Charging system and temperature control apparatus

Abstract

The present invention relates to a charging system and a temperature control apparatus. The charging system comprises a battery module; a charging device, which is configured to charge the battery module; a temperature regulation module, which is configured to regulate the temperature of the battery module; a temperature measurement module, which is configured to measure the temperature of the battery module; and a control module, which is configured to control and coordinate the operation of the temperature regulation module and the charging of the battery module on the basis of the temperature of the battery module. The temperature control apparatus comprises a housing; a battery pack mounting portion; a first vent, which is provided in the battery pack mounting portion, wherein when a battery pack is mounted to the battery pack mounting portion, the first vent is in communication with an air output hole of the battery pack; and a temperature control device, which comprises a temperature control element and an air suction fan, wherein when the battery pack is mounted to the battery pack mounting portion, the air suction fan is configured to drive an airflow passing through the temperature control element to flow into an air intake hole of the battery pack, pass through a battery cell in the battery pack, and then flow to the air output hole of the battery pack.

Description

A charging system and a temperature control device TECHNICAL FIELD

[0001] The present application relates to the field of power tools, in particular to a charging system and a temperature control device. BACKGROUND

[0002] In outdoor work scenarios, users need to use power tools to complete work tasks. Considering the impact of environmental pollution and the shortage of fossil energy, electric power tools have gradually become the choice of more and more users due to their environmental protection and cleanliness.

[0003] In order to adapt to various work scenarios, especially outdoor work scenarios, electric power tools usually need to work for a long time without interruption, so users need to charge the battery pack in time to meet the power endurance requirement.

[0004] Since the charging and discharging performance of the battery pack at low temperature is poor, in the outdoor scenario in cold regions, the battery pack not only has great difficulty in charging and discharging work, but also may be damaged by charging and discharging work. Therefore, the charging work of the battery pack at low temperature faces great challenges. SUMMARY

[0005] The various aspects of the present application are listed in independent claims 1-10. The optional features of the embodiments of the present application are listed in the dependent claims. The beneficial effects of the solution are as follows: a charging system with a temperature adjustment module is configured, which makes it possible to charge the battery module in a low temperature environment while ensuring the efficiency and safety of the charging system and improving the use scenarios of the charging system. BRIEF DESCRIPTION OF DRAWINGS

[0006] Embodiments of the present application will be further described in conjunction with the following drawings:

[0007] FIG. 1 is a schematic diagram of a charging system provided by the present application;

[0008] FIG. 2 is a schematic diagram of a battery module provided by the present application;

[0009] FIG. 3 is a schematic diagram of the flow of air in the battery pack when the battery module is installed in the charging device provided by the present application;

[0010] FIG. 4 is a combined schematic diagram of the charging system provided by the present application;

[0011] FIG. 5 is a schematic diagram of a charging device provided by the present application with the cover opened;

[0012] FIG. 6 is a schematic diagram of a charging device provided by the present application with the cover closed;

[0013] Figure 7 is a schematic diagram of the electrical connection between a battery module and a charging device according to the present application;

[0014] Figure 8 is a schematic diagram of the electrical connection between a battery module and a charging device according to the present application;

[0015] Figure 9 is a schematic diagram of the electrical connection between a battery module and a charging device according to the present application;

[0016] Figure 10 is a schematic diagram of a charging device according to the present application with a front wall removed;

[0017] Figure 11 is a schematic diagram of the air flow when the air inlet and air outlet are open according to the present application;

[0018] Figure 12 is a schematic diagram of the air flow when the air inside the housing is isolated from the air outside the housing according to an embodiment of the present application;

[0019] Figure 13 is a schematic diagram of the air flow when the air inside the housing is isolated from the air outside the housing according to another embodiment of the present application;

[0020] Figure 14 is a schematic diagram of the installation of the fan, temperature regulating element and heat conducting element according to the present application;

[0021] Figure 15 is a schematic diagram of the exploded view of the fan, temperature regulating element and heat conducting element according to the present application;

[0022] Figure 16 is a schematic diagram of the air inlet in an open state according to the present application;

[0023] Figure 17 is a schematic diagram of the air inlet in a closed state according to the present application;

[0024] Figure 18 is a schematic diagram of the air inlet from another perspective according to the present application;

[0025] Figure 19 is a schematic diagram of the exploded view of the air inlet according to the present application;

[0026] Figure 20 is a schematic diagram of the suction fan located between two oppositely arranged battery pack mounting portions according to the present application;

[0027] Figure 21 is a schematic diagram of the exploded view of the air guiding element, suction fan, on-off mechanism and battery pack mounting portion according to the present application;

[0028] Figure 22 is a schematic diagram of a charging device connected to a charger according to the present application. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work, in terms of structure, method or function, belong to the scope of protection of the present application.

[0030] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. In the illustrated embodiments, the orientation of the directional terms, such as up, down, front, back, left, right, and the like, are relative to the views of the drawings. These orientation terms are used to describe the relative orientation of the components in the application. These orientation terms are appropriate when the components are in the position shown in the drawings. However, if the position of the components is changed, it is considered that the orientation terms will also change accordingly.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "first", "second", etc. are used only to describe a particular embodiment and do not imply an order or a sequence unless otherwise specified. Thus, a feature specified as "first" can imply another feature second or a third feature. The use of the terms "first" and "second" are used to denote different features and do not imply any importance or any relative technical superiority. By the same token, the use of the term "and / or" includes any and all combinations of one or more related items.

[0032] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0033] In the working scene, the electric tool uses the battery pack as the power supply. Due to the limitation of the capacity of the battery pack, the endurance is short, and the electric tool cannot support long-time work.

[0034] In order to realize that the electric tool can work continuously in the outdoor scene, one method is that the user prepares a large number of battery packs in advance, and replaces the battery pack with full power in time after the battery pack with power is used up to meet the power demand of the electric tool. This way requires a large number of battery packs, and the cost of purchasing equipment is very high. Moreover, the user needs to charge a large number of battery packs, which is very inconvenient to operate and takes a long time to charge.

[0035] In order to reduce the use cost and improve the operation convenience, another method is that the user prepares a predetermined number of battery packs, such as 2-4, and carries the charging device when going out, so as to use the charging device to timely charge other battery packs in any operable time, such as when a battery pack is discharged to the power tool, or when the user drives to the work destination, and the like, so as to meet the power demand of the power tool. However, this way has a higher requirement for the charging efficiency of the charging device and the battery pack. Once the charging performance of any of the charging device or the battery pack is affected, such as the charging rate is very low in a low temperature environment, the charging cannot be realized quickly, and it will take several hours to charge the battery pack, the battery pack cannot supply power to the power tool, and thus the user cannot complete the work in time.

[0036] Generally, the charging and discharging performance of the battery pack is closely related to the temperature. When the temperature is appropriate, the charging and discharging performance of the battery pack is good, and the fast charging and discharging can be realized. When the temperature is low, the charging and discharging performance of the battery pack is greatly reduced, and this problem is particularly prominent in a low temperature or extremely cold severe environment. Therefore, in order to widely use the power tool in all regions of the world, especially in the regions with low temperature such as North America and Canada, the main problem is how to overcome the influence of the low temperature environment on the charging and discharging capability of the battery cell, and effectively improve the charging and discharging performance of the battery pack.

[0037] It is generally believed that the defect of the low charging and discharging performance of the battery pack in the low temperature environment is greatly limited by the battery cell technology. Unless the battery cell technology has a great development, the above problem cannot be solved in a short time.

[0038] The embodiment of the present application provides a different problem solving idea. A charging system is reasonably designed, and the balance between the battery temperature and the charging control is reasonably coordinated, so that the battery pack of the power tool still has good charging and discharging performance in a low temperature environment (such as an environment temperature of minus 10℃, or even minus 30℃), so that the user of the power tool does not need to worry about the problem that the battery pack cannot be normally charged and discharged due to the low temperature, the battery pack is damaged, or the work process is affected. This solution idea is helpful to realize the full regional coverage of the power tool driven by the battery pack.

[0039] The charging system and the charging method are described in detail in combination with different embodiments.

[0040] Please refer to FIG. 1. The charging system 10 provided by the embodiment includes a battery module 200 and a charging device 100.

[0041] As shown in FIGS. 2-3, the battery module 200 includes a battery cell group 230, which includes at least one battery cell 240, i.e., the battery cell group 230 can include one or more battery cells 240. If the battery cell group 230 includes a plurality of battery cells 240, the plurality of battery cells 240 can be connected in full series, full parallel, or partial series and partial parallel.

[0042] The battery cell 240 can be a cylindrical battery cell or a non-cylindrical battery cell. Optionally, the battery cell 240 is a pouch battery cell, and the battery cell 240 can be curved into an arc shape. In some embodiments, the battery cell can also be provided as a blade battery cell or a square battery cell, etc. Optionally, the battery cells 240 are stacked in the up-down direction.

[0043] Optionally, the capacity of the battery module 200 can be 2 Ah, 3 Ah, 4 Ah, 5 Ah, 6 Ah, 8 Ah, 11 Ah, 15 Ah, 17 Ah, 20 Ah, 30 Ah, 50 Ah, 80 Ah, 100 Ah, or even higher, which is not limited in the present application.

[0044] In some embodiments, as shown in FIG. 4, the battery module 200 can be a separate device, which is detachably connected or connected through a connecting device with the charging device 100. For example, when the battery module 200 is a battery pack, the battery pack can be a battery pack of different sizes and structures, such as a handheld pack 200b and a backpack 200c, which are detachably connected with the charging device 100. When the battery module 200 is a battery module 200a, it is connected with the charging device 100a through a cable. In some embodiments, the battery module 200 can also be a module built-in the charging device 100, which is fixedly arranged or detachably arranged inside the housing of the charging device 100.

[0045] Specifically, referring to FIGS. 2-3, taking the backpack as an example, the battery module 200 includes a battery pack housing 210. Optionally, the battery pack housing 210 includes a first housing 211 and a second housing 212 arranged oppositely. In some embodiments, the first housing 211 and the second housing 212 are assembled to form a receiving space for receiving the battery cell group 230, and the battery cell group 230 is received in the receiving space in the battery pack housing 210.

[0046] In the present embodiment, the battery module 200 further includes a battery pack interface 220 for connecting with the charging device 100. The battery pack interface 220 includes a pair of mating portions 220a, 220b. The pair of mating portions 220a, 220b are arranged on the battery pack housing 210, for guiding the sliding installation of the battery module 200 with the charging device 100, so that the battery module 200 is detachably installed to the charging device 100.

[0047] The battery pack interface 220 further comprises a plurality of battery pack poles 220c disposed between the pair of adapter portions 220a, 220b, for electrical connection with corresponding terminals of the charging device 100. The battery pack housing 210 is provided with a plurality of terminal grooves 215, each of the battery pack poles 220c is at least partially accommodated in one of the terminal grooves 215, when the battery module 200 is mounted on the charging device 100, the battery pack poles 220c are plugged with corresponding terminals of the charging device 100, thereby realizing electrical connection between the battery module 200 and the charging device 100.

[0048] In some embodiments, the battery pack poles 220c at least comprise a battery pack positive pole, a battery pack negative pole and a battery pack communication pole; wherein the battery pack positive pole and the battery pack negative pole are respectively electrically connected with the positive pole and the negative pole of the cell group 230, for transmitting charge and discharge current when mating with external equipment; the battery pack communication pole is electrically connected with the battery control module 260, for transmitting communication information with external equipment when mating with external equipment.

[0049] The battery pack interface 220 further comprises a locking portion 250, for cooperating with a corresponding component on the charging device 100 to realize locking between the battery module 200 and the charging device 100. Optionally, the locking portion 250 is disposed between the pair of adapter portions 220a, 220b. Optionally, the locking portion 250 is provided as a clamping groove.

[0050] In some embodiments, as shown in FIG. 2, the battery pack housing 210 is provided with ventilation holes 210a, 210b, one of which is an air inlet hole and the other is an air outlet hole, for air flow into and out of the battery pack housing 210, respectively. Optionally, the ventilation hole 210a is disposed at the bottom of the battery pack housing 210, and the ventilation hole 210b is disposed between the pair of adapter portions 220a, 220b in the left-right direction, and between the terminal groove 215 and the locking portion 250 in the up-down direction.

[0051] As shown in FIG. 1, the charging device 100 is configured to charge the battery module 200. In some embodiments, as shown in FIG. 4, the charging device 100 can have various forms, such as a single-port charger, a multi-port charger, a built-in energy storage charger, an external energy storage charger, a box-type charger, etc., which are not limited in the present application.

[0052] In an embodiment, referring to FIGS. 5 and 6, the charging device 100 comprises a housing 110. The housing 110 comprises a box body 112 and a cover body 114, the cover body 114 being pivotally connected to the box body 112 to open or close the box body 112. When the box body 112 is closed with the cover body 114, a closed space is formed. The housing 110 further comprises a first chamber and a second chamber adjacent to each other, and an intermediate housing 117 between the first chamber and the second chamber, and a battery pack mounting portion 120, wherein the intermediate housing 117 is disposed in the closed space, and the battery pack mounting portion 120 is disposed on the intermediate housing 117 and configured to detachably mount the battery module 200; when the battery module 200 is mounted on the battery pack mounting portion 120, the battery module 200 is in the first chamber in the closed space. FIGS. 5 and 6 are schematic diagrams of the box body 112 opening the cover body 114 and the box body 112 closing the cover body 114, respectively. The cover body can be operable to close the box body, which can seal against water on one hand, and prevent the temperature control inside the housing from being affected by the air outside the housing on the other hand, thereby effectively regulating the temperature of the battery module 200.

[0053] Optionally, in order to prevent the cover body 114 from being opened too much, the charging device 100 further comprises an arc-shaped connecting rod 116 connecting the box body 112 and the cover body 114.

[0054] Further, as shown in FIGS. 5 and 11, the box body 112 comprises a front wall 112a and a rear wall 112b disposed opposite in the front-rear direction, a left wall 112c and a right wall 112d disposed opposite in the left-right direction, and a bottom wall 112e.

[0055] The battery pack mounting portion 120 is disposed on the housing 110, and the battery pack mounting portion 120 is configured to detachably mount the battery module 200. Optionally, the battery pack mounting portion 120 is provided as one or more. In the embodiment shown, as shown in FIG. 4, the charging device 100 comprises four battery pack mounting portions 120. Optionally, in order to facilitate maintenance, the battery pack mounting portion 120 is detachably connected to the housing 110.

[0056] As shown in FIG. 7, the battery pack mounting portion 120 comprises a pair of guide portions 120a, 120b, which are connected with the mating portions 220a, 220b to guide the battery module 200 to be mounted on or detached from the charging device 100 along a sliding direction. Optionally, the sliding direction is set as the up-down direction.

[0057] The charging device 100 further comprises a plurality of device poles 120c located between the pair of guide portions 120a, 120b. When the battery module 200 is mounted to the charging device 100, the device poles 120c are used to electrically connect with corresponding battery pack poles 220c to realize power transmission between the battery module 200 and the charging device 100. In the embodiment, the device poles 120c are provided as a device positive pole, a device negative pole and a device communication pole. When the battery module 200 is mounted to the battery pack mounting portion 120 of the charging device 100, the device positive pole is connected to the battery pack positive pole in correspondence, the device negative pole is connected to the battery pack negative pole in correspondence to establish a charging and discharging path between the battery module 200 and the charging device 100, and the device communication pole is connected to the battery pack communication pole in correspondence to establish a communication path between the battery module 200 and the charging device 100.

[0058] It should be noted that the device poles and the battery pack poles can be provided in any form as easily thought of by those skilled in the art, which will not be described herein.

[0059] The battery pack mounting portion 120 further comprises a terminal seat 115 provided on the housing 110, and the device poles 120c are mounted on the terminal seat 115.

[0060] Please continue to refer to FIG. 7, the battery pack mounting portion 120 further comprises a locking member 150. When the battery module 200 is mounted to the charging device 100, the locking member 150 is used to cooperate with the locking portion 250 to lock the battery module 200 and the charging device 100. Optionally, in the left-right direction, the locking member 150 is provided between the pair of guide portions 120a, 120b.

[0061] Optionally, the locking member 150 is provided as a buckle. Of course, the locking member and the locking portion can also be provided in other forms, such as the locking member is provided as a clamping groove and the locking portion is provided as a buckle matched with the clamping groove, which will not be limited herein.

[0062] The battery pack mounting portion 120 further comprises a triggering member 151, which is capable of driving the locking member 150 to move from a locking position to an unlocking position. When the locking member 150 is located at the locking position, the locking member 150 is connected in cooperation with the locking portion 250 to lock the connection between the charging device 100 and the battery module 200. When the locking member 150 is located at the unlocking position, the locking member 150 is disconnected from the locking portion 250 to unlock the connection between the charging device 100 and the battery module 200. Optionally, the triggering member 151 is provided as a button.

[0063] The battery pack mounting portion 120 is further provided with a first ventilation opening 121. When the battery device 200 is mounted to the battery pack mounting portion 120, the first ventilation opening 121 is configured to communicate with the ventilation hole 210b of the battery device 200. Optionally, the ventilation hole 210b at least partially interfaces with the first ventilation opening 121. Optionally, in the left-right direction, the first ventilation opening 121 is disposed between the pair of guide portions 120a, 120b, and in the up-down direction, the first ventilation opening 121 is located between the locking member 150 and the device tab 120c.

[0064] The charging system 10 further comprises a temperature adjustment module disposed in the battery module 200 and / or the charging device 100, and configured to at least adjust the temperature of the battery module 200. That is, the temperature adjustment module can heat and / or cool the battery module 200.

[0065] In some embodiments, the temperature adjustment module can comprise both a heating module and a cooling module. Optionally, the temperature adjustment module comprises a Peltier element. In some embodiments, the temperature adjustment module can comprise only a heating module or only a cooling module. Optionally, the heating module comprises a heating element, which can be configured as a resistance wire or a heating film, etc.; and the cooling module comprises a cooling element, which can be configured as a phase change material or a hydrogel, etc.

[0066] Referring to FIGS. 8-10, in some embodiments, the temperature adjustment module comprises only a first temperature adjustment module 270 disposed in the battery module 200, or only a second temperature adjustment module 140 disposed in the charging device 100. In some embodiments, the temperature adjustment module comprises both the first temperature adjustment module 270 and the second temperature adjustment module 140, wherein the first temperature adjustment module 270 is disposed in the battery module 200, and the second temperature adjustment module 140 is disposed in the charging module 100.

[0067] Optionally, the first temperature adjustment module 270 is disposed in at least one of the following positions: wrapped around the battery cell group 230 along the outer surface of the battery cell group 230, or disposed between the battery cells 240, or disposed on one side of the battery cell group 230, or disposed on the end plate connecting the battery cell group 230. The position of the first temperature adjustment module 270 is not specifically limited here.

[0068] When the first temperature adjustment module 270 is disposed close to the battery cell group 230, the cold / hot generated by the temperature adjustment module will first act on the battery cell group 230, reducing unnecessary loss in other parts, and the battery cell group 230 can be effectively heated and / or cooled.

[0069] Optionally, the setting position of the second temperature adjusting module 140 includes any position in the closed space formed by the box 112 and the cover 114; for example, in the first chamber, or in the second chamber, etc. to heat and / or cool the battery module 200 through air flow; for example, at the battery pack mounting portion 120, when the battery module 200 is mounted to the battery pack mounting portion 120, to be as close to the battery module 200 as possible, and also to effectively heat and / or cool the battery module 200.

[0070] For example, as shown in FIGS. 2-3, in some embodiments, the air vent 210a of the battery module 200 is used as an air inlet, the air vent 210b is used as an air outlet, and the battery pack mounting portion 120 is provided with a first air vent 121 corresponding to the air vent 210a. When the temperature adjusting module in the charging device 100 performs heating work, hot air can enter the battery module 200 from the air vent 210a, flow through the battery cell group 230, and then flow out from the air vent 210b, thereby achieving heating of the battery cell group 230. In actual operation, the specific arrangement of the temperature adjusting module can be designed based on requirements, and the present application is not limited.

[0071] It can be understood that no matter where the temperature adjusting module 400 is arranged in the battery module 200 and / or the charging device 100, the temperature of the battery module 200 can be adjusted, not only solving the influence of abnormal temperature on the charging system, but also effectively improving the flexibility of product design.

[0072] The charging system 10 further includes a temperature detecting module configured to detect the temperature of the battery module 200. The temperature of the battery module 200 includes the temperature related to the battery module 200, such as the temperature of the battery cell group 230, the temperature of the control board (not shown) of the battery module, the temperature at the power element of the battery module 200, the temperature at the connection between the battery module 200 and other devices, the temperature at the shell of the battery module 200, the ambient temperature of the battery module 200, etc.

[0073] The charging system further comprises a control module configured to control the operation of the temperature adjustment module according to the temperature of the battery module 200. The control module is arranged in the charging device 100 and / or the battery module 200. As shown in FIGS. 8-10, in some embodiments, the control module only comprises a battery control module 260 arranged in the battery module 200 and configured to control the first temperature adjustment module 270 and / or the second temperature adjustment module 140. In some embodiments, the control module only comprises a charging device control module 160 arranged in the charging device 100 and configured to control the first temperature adjustment module 270 and / or the second temperature adjustment module 140. In some embodiments, the control module comprises both the battery control module 260 and the charging device control module 160 arranged in the battery module 200 and the charging device 100 respectively, and the battery control module 260 and the charging device control module 160 cooperate with each other to independently or jointly control the operation of the first temperature adjustment module 270 and / or the second temperature adjustment module 140.

[0074] In some embodiments, as shown in FIGS. 8-10, the battery module 200 comprises a battery control module 260 arranged on a circuit board (not shown) and configured to control the operation of the battery module 200, i.e., to control various operations of the battery module 200, including charging and / or discharging control, fault handling, communication, data analysis, data uploading, software updating, etc. When the first temperature adjustment module 270 is arranged in the battery module 200, the battery control module 260 is further configured to control the operation of the first temperature adjustment module 270.

[0075] In some embodiments, as shown in FIGS. 8-10, the charging device 100 comprises a charging device control module 160 arranged on a circuit board (not shown) in the charging device and configured to control the charging and communication of the battery module 200, as well as the fault handling, data analysis, data uploading, software updating, etc. of the charging device 100 itself. When the second temperature adjustment module 140 is arranged in the charging device 100, the charging device control module 160 is further configured to control the operation of the second temperature adjustment module 140.

[0076] For the temperature adjustment module, it is not always in operation. When the temperature adjustment module comprises a heating module, the temperature threshold corresponding to the start of heating and the stop of heating is preset in the control module to control the start and stop of the heating operation of the temperature adjustment module. By reasonably selecting the temperature threshold, the temperature of the battery module 200 is reasonably controlled, and the optimal performance of the charging and discharging performance is achieved, and the charging and discharging efficiency is improved.

[0077] In some embodiments, the control module controls the temperature adjustment module to start heating when the temperature of the battery module 200 is not greater than a first heating temperature threshold.

[0078] Specifically, the first heating temperature threshold is a temperature threshold at which the temperature adjustment module starts heating. When the temperature of the battery module 200 is not greater than the first heating temperature threshold, the temperature of the battery module 200 is low, and the charge-discharge performance of the battery module 200 is poor, which cannot charge and discharge or can only charge and discharge at a small current, far failing to meet the user's working demand of fast charging. Therefore, when the temperature of the battery module 200 is lower than the first heating temperature threshold, the temperature adjustment module starts heating to raise the temperature of the battery module 200 to a reasonable temperature range, so that the battery module 200 can fully exert the charge-discharge performance.

[0079] In some embodiments, the first heating temperature threshold is any value in -30°C to 15°C. Alternatively, the first heating temperature threshold is any value in -10°C to 0°C. Alternatively, the first heating temperature threshold is any one of -30°C, or -20°C, or -10°C, or 0°C.

[0080] In some embodiments, the control module controls the temperature adjustment module to stop heating when the temperature of the battery module 200 is not less than a second heating temperature threshold.

[0081] The second heating temperature threshold is a temperature threshold at which the temperature adjustment module stops heating. When the temperature of the battery module 200 is greater than the second heating temperature threshold, the temperature of the battery module 200 is high, and the charge-discharge performance of the battery module 200 is low, which cannot continuously fast charge, or continues to fast charge will cause the temperature of the battery module 200 to be too high to enter an over-temperature protection state, and thus waste the charging time. Therefore, when the temperature of the battery module 200 is higher than the second heating temperature threshold, the temperature adjustment module stops heating to avoid the temperature of the battery module 200 becoming too high, so that the battery module 200 can fully exert the charge-discharge performance in a suitable temperature range.

[0082] In some embodiments, the second heating temperature threshold is any value in 0°C to 60°C. Alternatively, the second heating temperature threshold is any value in 5°C to 30°C. Alternatively, the second heating temperature threshold is any value in 5°C to 15°C. Alternatively, the second heating temperature threshold is any one of 0°C, or 7°C, or 8°C, or 30°C, or 55°C, or 60°C.

[0083] In one embodiment, as shown in FIGS. 8-10, the temperature adjustment module includes a first temperature adjustment module 270 disposed in the battery module 200. The first temperature adjustment module 270 is electrically connected with the charging device 100 to form a first temperature adjustment power supply path, when the first temperature adjustment power supply path is turned on, the first temperature adjustment module 270 is powered by the charging device 100; or the first temperature adjustment module 270 is electrically connected with at least one battery cell 240 to form a second temperature adjustment power supply path, when the second temperature adjustment power supply path is turned on, the first temperature adjustment module 270 is powered by at least one battery cell 240; or the first temperature adjustment module 270 is electrically connected with the charging device 100 to form a first temperature adjustment power supply path, and the first temperature adjustment module 270 is also electrically connected with at least one battery cell 240 to form a second temperature adjustment power supply path, and the control module is configured to selectively turn on at least one of the first temperature adjustment power supply path and the second temperature adjustment power supply path to select at least one of the charging device 100 and the at least one battery cell 240 to power the first temperature adjustment module 270.

[0084] It can be understood that the first temperature adjustment module 270 can only support the power supply of the battery cell group 230, and therefore, in the circuit design, the battery cell group 230 is electrically connected with the first temperature adjustment module 270 to form a first temperature adjustment power supply path, which can realize the power supply of the first temperature adjustment module 270 by the battery cell group 230. In this way, the power for heating is derived from the outside, the power supply is sufficient, and the power of the battery module 200 itself does not need to be consumed, which is more suitable for scenarios in which the charging device 100 can work, such as scenarios in which the charging device 100 supports output heating power, the mains power is available, and the storage power of the charging device 100 is sufficient.

[0085] Alternatively, the first temperature adjustment module 270 can also only support the power supply provided by the charging device 100 connected with the battery module 200, and therefore, the charging device 100 is electrically connected with the first temperature adjustment module 270 to form a second temperature adjustment power supply path, which can realize the power supply of the first temperature adjustment module 270 by the charging device 100. In this way, the power for heating is derived from the inside of the battery module 200, and the power is limited by the remaining power of the battery module 200 itself, but when the charging device 100 does not have the heating function and cannot provide the heating power supply for the battery module 200, the battery module 200 can use the power itself to heat the battery cell group 230 to improve the charging efficiency, and this way makes the battery module 200 be able to adapt to various special working environments, which also has important significance.

[0086] Optionally, the first temperature regulation module 270 can also be powered by the battery cell group 230 and / or the charging device 100 at the same time, and the battery module 200 is provided with a first temperature regulation power supply path electrically connecting the battery cell group 230 and the first temperature regulation module 270 and a second temperature regulation power supply path electrically connecting the charging device 100 and the first temperature regulation module 270. The control module is configured to selectively select at least one of the first temperature regulation power supply path and the second temperature regulation power supply path to supply power to the first temperature regulation module 270. This way combines the advantages of the above two ways and is suitable for most working scenarios.

[0087] By providing different power supply circuit designs for the first temperature regulation module 270, the flexibility of the power supply source is improved.

[0088] Further, in some embodiments, the control module includes a battery control module 260 disposed in the battery module 200 and configured to: detect whether the battery module 200 obtains power from the charging device 100; if yes, control the second temperature regulation power supply path to be turned on to select the charging device 100 to supply power to the first temperature regulation module 270; if no, obtain a battery module parameter of the battery module 200; when the battery module parameter meets a first preset condition, control the second temperature regulation power supply path to be turned on to select at least one battery cell 240 to supply power to the first temperature regulation module 270; and when the battery module parameter does not meet the first preset condition, control the second temperature regulation power supply path to be turned off to cut off the power supply to the first temperature regulation module 270.

[0089] The power required by the temperature regulation module is usually large, and since the power of the battery module 200 is limited, when the battery module 200 simultaneously supports power supply by the battery cell group 230 and the charging device 100, the first temperature regulation module 270 is optionally powered by the charging device 100 first. Therefore, as shown in FIG. 8, when the battery module 200 is connected to the charging device 100, when the battery control module 260 detects that the battery module 200 obtains power from the charging device 100, indicating that the power is successfully obtained, the battery control module 260 controls the first temperature regulation power supply path powered by the charging device 100 to be turned on; and when the battery control module 260 detects that power is not obtained, the power supply by at least one battery cell 240 is considered.

[0090] To ensure the safety of the battery module 200 and avoid unnecessary damage, the battery core group can start to supply power to the first temperature adjustment module 270 only when the parameters of the battery module 200 meet the conditions. Specifically, the battery control module 260 detects the battery module parameters of the battery module 200 in real time. When the battery control module 260 determines that the battery module parameters meet the first preset condition, it indicates that the parameter conditions of the battery module meet the requirements, and therefore the first temperature adjustment module is allowed to be powered by the battery core group. Otherwise, when the battery control module 260 determines that the battery module parameters do not meet the first preset condition, the first temperature adjustment module 270 is prohibited to be powered by the battery core group.

[0091] Further, in some embodiments, the first preset condition includes at least one of the following: the battery module has a power not lower than a preset power threshold, the battery module has a voltage not lower than a preset voltage value, the battery module has a temperature not higher than a high temperature threshold, the battery module is not in a fault state, and the battery module allows the first heating module to be powered.

[0092] It can be understood that the battery module 200 needs to be powered and output, and its power must be relatively sufficient and its working state must be normal. Therefore, the first preset condition is mainly a condition related to the electrical parameters of the battery module 200, especially a condition that must be met for the battery module 200 to work normally. The above at least one condition is met to enable the battery module 200 to be in a safe and stable working state as much as possible, reduce unnecessary damage, and prolong the service life of the battery module 200.

[0093] Optionally, as shown in FIGS. 8-10, a temperature switch module is arranged in the first temperature adjustment power supply path. In some embodiments, the temperature switch module includes switch elements Q3 and Q4, which are arranged in the second temperature adjustment power supply path. The battery control module 260 controls the conduction and disconnection of Q3 and Q4 to control the on-off of the first temperature adjustment power supply path. Optionally, the battery control module 260 can also control the duty cycle of Q3 and Q4 to control the working voltage of the first temperature adjustment module 270, and thus control its working power.

[0094] In some embodiments, the temperature switch module further comprises switch elements Q1, Q2, Q3 and Q4, which are arranged in the first temperature adjustment power supply path. The battery control module 260 controls the on and off of Q1, Q2, Q3 and Q4 to control the on and off of the first temperature adjustment power supply path. The current flows through Q1, Q2, Q4 and Q3 in turn from the battery cell group to provide power to the first temperature adjustment module 270. It should be noted that this circuit design is suitable for the case where the first temperature adjustment module only supports power supply by the charging device 100, and is also suitable for the case where the first temperature adjustment module only supports power supply by the battery cell group, and is also suitable for the case where the battery cell group 230 and / or the charging device 100 supply power. Among them, switch elements Q3 and Q4 are arranged in the first temperature adjustment power supply path and the second temperature adjustment power supply path, switch elements Q1 and Q2 have the functions of charging on and off and heating on and off, Q1, Q2, Q3 and Q4 are multi-purpose switch elements; to a certain extent, it can improve the utilization rate of elements and reduce product cost.

[0095] In some embodiments, the control module comprises a battery control module 260 arranged in the battery module 200. When the battery module 200 is connected to the charging device 100, the battery control module 260 is configured to generate a request instruction and send it to the charging device 100 to request power supply power from the charging device 100. The request instruction represents a temperature control request and / or a charging request.

[0096] It should be noted that if the first temperature adjustment module 270 is arranged in the battery module 200, when the temperature of the battery module 200 is not greater than the first heating temperature threshold, the battery control module 260 sends a request instruction to the charging device 100 to start heating the first temperature adjustment module 270, and when the temperature of the battery module 200 is greater than the second heating temperature threshold, the second temperature adjustment module 270 stops heating.

[0097] Specifically, when the battery module 200 is connected to the charging device 100, the first temperature adjustment module 270 cannot directly obtain the power supply power of the charging device 100. Therefore, the battery control module 260 sends a request instruction to the charging device 100 to obtain the power supply power from the charging device 100. The existing charging devices are various, and some can identify the temperature control request representing heating / cooling of the battery module 200. The battery control module 260 can only send a request instruction representing the temperature control request to obtain the power supply; while more charging devices can only identify the charging request, and the battery control module 260 can disguise the temperature control request into the form of the charging request, that is, send a request instruction representing the charging request to obtain the power supply, so that the battery module 200 is compatible with more charging devices. Of course, the battery control module 260 can also send a request instruction representing both the temperature control request and the charging request, so that the peripheral device can at least identify the charging request to provide the power supply. Such a design greatly improves the compatibility of the battery module 200 with the charging device 100.

[0098] In addition, the relationship between the temperature of the battery module 200 and the allowable charging temperature threshold of the battery module 200 can also cause the battery control module 260 to send different request instructions. Specifically, if the temperature of the battery module 200 is less than the allowable charging temperature threshold, whether the first heating temperature threshold of the battery module 200 is reached (that is, the temperature adjustment module starts heating when the temperature is less than the temperature threshold), the battery module 200 always performs only heating operation; At this time, the battery module 200 cannot send a request instruction representing a "charging request", but can only send a "temperature control request" or a "charging request" representing a "temperature control request". If the temperature of the battery module 200 reaches the allowable charging temperature threshold, the battery module 200 can perform heating and charging at the same time. At this time, since the battery module 200 is allowed to charge, the battery module 200 can only send a "charging request", which represents both a charging request and a heating request. When the temperature of the battery module 200 reaches the second temperature threshold (that is, the temperature at which the heating module stops heating), the battery module 200 stops heating and only charges, and the battery module 200 can only send a "charging request", which only represents a charging request. In the technical solution provided in the present application, the battery control module 260 can send a request instruction to the charging device 100 according to the specific situation of the battery module 200 to meet various temperature conditions, thereby improving the operation flexibility and control intelligence of the battery module 200.

[0099] Further, in some embodiments, the battery control module 260 is further configured to: after sending the request instruction to the charging device 100, detect the current of the battery module 100; when the current of the battery module 200 is greater than a first preset current value, determine that the battery module 200 successfully obtains the power supply power from the charging device 100; when the current of the battery module 200 is not greater than the first preset current value, determine that the battery module 200 does not obtain the power supply power from the charging device 100; wherein the power supply power is used to power the first temperature adjustment module 270.

[0100] It should be noted that the battery control module 200 generally determines whether the battery module 200 obtains the power supply power by detecting the current of the charging and discharging main loop of the battery module 200, at this time Q1 and Q2 are closed, and the requested power supply current needs to flow through the battery cell group 230 first. When the temperature of the battery module 200 is lower than the allowed charging temperature threshold, the resistance value of the battery cell group 230 is very large, and even if a small current, for example, 1A, flows, it will cause the power value occupied on the battery cell group 230 to be extremely large, sometimes even exceeding the output power of the charging device 100, at this time, the situation that the charging device is overloaded and the power supply fails may occur. For the case that the temperature of the battery module 200 is not lower than the allowed charging temperature threshold, the battery module 200 is already in the allowed charging stage, and thus the situation that the power supply fails to be requested is not easy to occur. In addition, after the battery module 200 is connected with the charging device 100, the battery module 200 necessarily has working currents, which may be used for the self-working of the battery module 200, for communication interaction with the charging device 100, and the like, but these are usually micro currents, which are different from the current required for heating. Therefore, it is also necessary to set a current lower limit value to ensure that the battery module 200 indeed obtains the power supply power from the charging device 100 to power the first heating module.

[0101] Therefore, it is necessary to detect the current of the battery module 200 to determine whether it indeed obtains the power supply power from the charging device 100. Specifically, when the current of the battery module 200 is greater than a first preset current value, it is determined that the output power of the charging device 100 is sufficient to provide power supply to the battery module 200, and thus it is determined that the battery module 200 successfully obtains the power supply power from the charging device 100; on the contrary, when the current of the battery module 200 is not greater than the first preset current value, it is determined that the battery module 200 does not obtain the power supply power from the charging device 100.

[0102] Optionally, the first preset current value is in the range of 0.3-3A; optionally, the first preset current value is in the range of 0.5-2A; optionally, the first preset current value is 2A. The specific value can be set according to the battery cell material, and the present application is not limited.

[0103] Optionally, to further prevent misjudgment, when the battery control module 260 determines that the battery module 200 fails to obtain the power supply from the charging device 100, the count is incremented by one, and the request instruction is repeatedly sent to the charging device 100 to obtain the power supply. When the count exceeds a preset number, for example, three times, the battery control module 260 finally determines that the power supply fails to be obtained, and stops the request. Since the battery module 200 does not reach the allowable charging temperature threshold at this time, and cannot obtain the power supply from the charging device 100 for heating, in order to avoid further power loss of the battery module 200, the battery control module 260 enters the sleep mode after a delay, or disconnects the power supply.

[0104] In one embodiment, as shown in FIGS. 8-10, the temperature adjustment module includes a second temperature adjustment module 140, which is arranged in the charging device 100; since the charging device 100 is more convenient to obtain an external power supply source, and the external power supply source has sufficient power, the charging device 100 is usually used to provide power supply for the second temperature adjustment module 140. Optionally, a switch module is arranged in the power supply circuit of the second temperature adjustment module 140, and the switch module includes switch tubes Q5 and Q6 connected in series. The charging device control module 160 controls the on-off of Q5 and Q6 to control the start and stop of the second temperature adjustment module 140. Optionally, the charging device control module 160 can also control the duty cycle of Q5 and Q6 to control the working voltage of the second temperature adjustment module 140, and further control the working power thereof.

[0105] When the second temperature adjustment module 140 is arranged in the charging device 100, the charging device 100 controls the working of the second temperature adjustment module 140, and simultaneously controls the charging of the battery module. Specifically, in one embodiment, as shown in FIGS. 9-10, the control module includes a battery control module 260 and a charging device control module 160, the battery control module 260 is arranged in the battery module 200, and the charging device control module 160 is arranged in the charging device 100; when the battery module 200 is connected to the charging device 100, the battery control module 260 establishes communication with the charging device control module 160 to transmit communication information; the charging device control module 160 is further configured to: according to the communication information, provide charging power for the battery module 200, and control the working of the second temperature adjustment module 140.

[0106] The second temperature adjustment module 140 is arranged in the charging device 100, and is directly controlled by the charging device 100 to provide power supply, which is more direct and convenient. Of course, the charging device control device 160 can also control the start and stop of the second temperature adjustment module 140 according to the communication information, for example, the request of the battery pack.

[0107] Further, the charging device control device 160 also transmits communication information with the battery control module 260, and controls the charging of the battery module 200 based on the communication information. In this embodiment, the charging device control module 160 controls the output of the charging power according to the communication information with the battery control module 260. Specifically, the battery control module 260 determines the charging rate based on the temperature, and sends various charging parameters including the charging rate to the charging device control module 160 as communication information, and the charging device control module 160 provides charging power to the battery module 200 according to the received various charging parameters and in combination with its own charging capability. It can be understood that if the requested charging parameters of the battery control module 260 do not exceed the charging capability of the charging device 200, the charging device control module 160 controls the output of the matching charging power; if the requested charging parameters of the battery control module 260 exceed the charging capability of the charging device 200, the charging device control module 160 controls the charging device 100 to output the maximum charging capability. Thus, under the premise of ensuring the safe operation of the charging device 100, the charging requirements of the battery module 200 are met as much as possible. By controlling the charging of the battery module 200 and the operation of the second temperature adjusting module through communication, more accurate control of temperature adjustment and charging can be achieved, and the use safety and reliability of the charging system 10 are improved.

[0108] Optionally, the charging device 100 is provided with a charging device control module 160, when the battery module 200 is connected to the charging device 100, the charging device control module 160 and the battery control module 260 establish a communication connection through the communication pole, and transmit communication information to each other. Optionally, the communication mode between the charging device control module 160 and the battery control module 260 can be digital communication and / or analog communication. Among them, the digital communication includes but is not limited to UART, I 2C, CAN, special communication and the like. Optionally, the communication pole can be provided with only one, or can be provided with multiple, which can be matched based on the communication mode, and the present application does not make specific limitation.

[0109] In an embodiment, the communication information transmitted between the charging device control module 160 and the battery control module 260 includes, but is not limited to, the operating parameters and state parameters of the charging device 100, the operating parameters and state parameters of the battery module; wherein the operating parameters of the charging device 100 include, but are not limited to, the output charging current, the output charging voltage, the maximum output current, the output charging rate, the maximum output voltage, the high / low charging temperature threshold, the charging time, the charging cycle number, etc. of the charging device 100, and the state parameters of the charging device 100 include, but are not limited to, the fault state parameters, the historical data, the software update data, etc. of the charging device 100. The operating parameters of the battery module 200 include, but are not limited to, the required charging current, the required charging voltage, the required charging rate, the maximum charging current, the maximum charging voltage, the high / low charging temperature threshold, the charge / discharge cycle number, the remaining power, etc. of the battery module 200, and the state parameters of the battery module 200 include, but are not limited to, the life information, the fault state parameters, the historical data, the software update data, etc. of the battery module 200.

[0110] Optionally, in some embodiments, the communication information at least includes the temperature of the battery module; the charging device control module 160 is configured to: receive the temperature of the battery module 200; control the second temperature adjusting module 140 to start heating when the temperature of the battery module 200 is not greater than a third heating temperature threshold; and / or control the second temperature adjusting module 140 to stop heating when the temperature of the battery module 200 is greater than a fourth heating temperature threshold.

[0111] Wherein the opening and closing temperatures of the second temperature adjusting module 140 can be consistent with or different from the first temperature adjusting module 270. Optionally, the second temperature adjusting module 140 can also control the opening and closing according to the temperature of the battery module 200, i.e. according to the temperature value transmitted by the battery control module 260, but since there may be some deviation between the temperature of the charging device 100 and the temperature of the battery module 200, another temperature threshold can be set, thereby controlling the second temperature adjusting module 140 based on the communication information.

[0112] Of course, optionally, the second temperature adjusting module 140 can also control the opening and closing according to the temperature of the charging device 100 itself. For example, the charging device control module 160 also controls the start and stop of the second temperature adjusting module 270 according to the ambient temperature of the charging device 100. Specifically, the charging device control module 160 obtains the ambient temperature of the charging device 100, controls the second temperature adjusting module 270 to start heating when the ambient temperature is not greater than a first ambient temperature threshold, and controls the second temperature adjusting module 270 to stop heating when the ambient temperature is greater than a second ambient temperature threshold. Optionally, the ambient temperature of the charging device 100 includes, but is not limited to, the external ambient temperature of the charging device 100, the temperature inside the shell of the charging device 100, the temperature of the battery pack mounting portion of the charging device 100, etc.

[0113] Optionally, the first heating temperature threshold is the same as the first ambient temperature threshold, and the second heating temperature threshold is the same as the second ambient temperature threshold. Of course, optionally, the first heating temperature threshold is different from the first ambient temperature threshold, and the second heating temperature threshold is different from the second ambient temperature threshold. The setting of these temperature thresholds can be adjusted based on actual needs, which is not limited in the present application.

[0114] In some embodiments, the communication information at least includes temperature control instructions; the battery control module 260 is further configured to: obtain the temperature of the battery module 200, generate the temperature control instructions according to the temperature of the battery module 200, and send to the charging device control module 160; when the temperature of the battery module 200 is not greater than the first heating temperature threshold, the temperature control instructions represent that the battery module is allowed to heat, and the charging device control module 160 controls the second temperature adjusting module 140 to start heating in response to the temperature control instructions; when the temperature of the battery module 200 is greater than the second heating temperature threshold, the temperature control instructions represent that the battery module 200 is not allowed to heat, and the charging device control module 160 controls the second temperature adjusting module 140 to close the heating in response to the temperature control instructions.

[0115] In the communication information transmitted by the battery control module 260, the specific temperature value can also not be included, but a control instruction representing the temperature condition, that is, the battery control module 260 converts the temperature value of the battery module 200 into a temperature control instruction representing the temperature value, and the charging device control module 160 controls the second temperature adjusting module 140 to open and close according to the temperature adjusting module.

[0116] It can be understood that the interface of the battery module 200 and the charging device 100 can only include digital communication terminals, can only include analog communication terminals, or can include both digital communication terminals and analog communication terminals. When only analog communication terminals are provided, only analog signals are transmitted between the battery control module 260 and the charging device control module 160. Since specific temperature data cannot be transmitted, temperature control instructions representing temperature values can be transmitted, so that effective communication can also be achieved. When the interface includes digital communication terminals, digital signals are transmitted between the battery control module 260 and the charging device control module 160, that is, both specific temperature values and temperature control instructions can be transmitted.

[0117] In some embodiments, the communication information at least includes a charging control instruction; the battery control module 260 is further configured to: obtain the parameter of the battery module 200, generate the charging control instruction according to the parameter of the battery module, and send to the charging device control module 160; when the parameter of the battery module 200 is within the allowed parameter range, the charging control instruction represents that the battery module 200 allows charging, and the charging device control module 160 controls to provide charging power to the battery module 200 in response to the charging control instruction; when the parameter of the battery module is not within the allowed parameter range, the control instruction represents that the battery module 200 prohibits charging, and the charging device control module 160 controls to stop providing charging power to the battery module 200 in response to the charging control instruction.

[0118] In this embodiment, the charging device control module 160 controls the charging of the battery module 200 according to the communication information with the battery control module 260. Specifically, when the battery control module 260 determines whether the working state of the battery module allows charging and correspondingly generates a charging control instruction representing that charging is allowed or prohibited, the charging device control module 160 controls the charging of the battery module 200 according to the charging control instruction. It can be understood that only when all parameters of the battery module 200 are in a good state allowing charging, safe charging can be performed, and therefore, the charging device 100 controls the charging of the battery module 200 based on the communication information, which can also improve the safety, reliability and accuracy of the charging.

[0119] For the battery module 200, when the battery cell groups adopt different battery cell materials, the temperature range corresponding to the good charging and discharging performance of the battery cell groups is also different. Optionally, the battery cell material can be selected from lithium iron phosphate, ternary lithium, lithium titanate, lithium cobaltate, lithium manganate, sodium ion, solid state and the like, and the specific material is not limited in the present application. When the temperature is low, for example, lower than 0℃, or when the temperature is high, for example, higher than 60℃, the performance of substantially all battery cells will decrease to different degrees, and the battery cells need to be charged with current limiting or cannot be charged. The battery cell group of such battery cell material has a charging rate of not less than 2C within a suitable temperature range. However, regardless of the material used by the battery module 200, the influence of high and low temperature needs to be solved.

[0120] Therefore, when the charging system 10 in a low temperature environment has a charging demand, the battery module 200 needs to be reasonably temperature-regulated, and charged at a suitable temperature with a matching charging rate; in other words, a reasonable balance needs to be sought between temperature regulation and charging control.

[0121] In the charging system 10, in some embodiments, the control module is further configured to start charging of the battery module 200 by the charging device 100 when the temperature of the battery module 200 is not less than the allowed charging temperature threshold.

[0122] Similarly, the battery module 200 is not always directly chargeable. Considering that the charge-discharge performance of the battery module 200 is closely related to its temperature, the charge-discharge performance of the battery module 200 is low at low or high temperature; and the charge-discharge performance of the battery module 200 is good at appropriate temperature. Therefore, charging is usually not allowed when the temperature of the battery module 200 is too high or too low, and the battery module 200 is allowed to charge when the temperature of the battery module 200 is not less than the allowed charging temperature threshold, and the charging device starts charging the battery module 200.

[0123] It should be noted that the allowed charging temperature threshold is the temperature threshold at which the battery module 200 is allowed to charge. When the temperature of the battery module 200 is less than the first heating temperature threshold, the temperature of the battery module 200 is too low, and the battery module 200 is not allowed to charge at this time. In order to avoid unnecessary damage to the battery module 200, the temperature of the battery module 200 is far from meeting the user's working requirements for fast charging. Therefore, the battery module 200 is allowed to charge when the temperature of the battery module 200 is not less than the allowed charging temperature threshold. The advantage of this design is that on the one hand, the safety of the battery module 200 is protected; on the other hand, the battery module 200 can be charged within a reasonable temperature range to fully exert the charging performance and improve the charging efficiency.

[0124] In some embodiments, the allowed charging temperature threshold is any value in -20°C to 15°C. Alternatively, the allowed charging temperature threshold is any value in -10°C to 5°C. Alternatively, the allowed charging temperature threshold is -10°C or 0°C.

[0125] In order to coordinate the work between temperature regulation and charging control, the second heating temperature threshold can also be associated with the charging rate of the battery module 200. In some embodiments, when the temperature of the battery module is not less than the second heating temperature threshold, the temperature regulation module stops heating; when the temperature of the battery module is not less than the third charging temperature threshold, the control module determines the charging rate of the battery module to be the second charging rate, which is the maximum charging rate that the battery module can reach during charging; wherein the second heating temperature threshold is not less than the allowed charging temperature threshold and not greater than the third charging temperature threshold.

[0126] That is, after the battery module 200 allows charging, and before or when the maximum charging rate of the self-charging capacity during the charging process is reached, the temperature adjustment module stops heating. The benefit of this design is that the battery module 200 can be continuously heated to continuously improve the charging rate of the battery module 200, thereby improving the charging efficiency. When the charging rate of the battery module 200 reaches the maximum capacity, i.e., the second charging rate, since the larger charging rate will generate a certain amount of heat in the charging operation itself to the battery module 200, heating should be stopped in time, which can maintain the charging rate of the battery module 200 and avoid the interruption of the charging process due to the excessive temperature of the battery module 200, thereby saving the charging time to the greatest extent and improving the charging efficiency.

[0127] In some embodiments, when the temperature of the battery module 200 is too high, the battery module 200 will enter the over-temperature protection to prohibit charging.

[0128] In some embodiments, in order to enable the battery module 200 to always charge at a relatively optimal charging rate, thereby improving the charging control accuracy and charging efficiency of the battery module 200, the control module is further configured to determine the charging rate of the battery module 200 according to the temperature of the battery module 200, and the charging device 100 charges the battery module 200 at the charging rate; wherein the charging rate changes with the change of the temperature of the battery module 200.

[0129] Optionally, the charging rate of the battery module 200 ranges from 0 to 20C. Optionally, the charging rate of the battery module ranges from 0 to 10C. Optionally, the charging rate of the battery module ranges from 0 to 8C. Optionally, the charging rate of the battery module ranges from 0 to 6C. The charging rate range of the battery module 200 is closely related to the material of the battery cell. Different battery cell materials have different charging rate ranges of the battery module 200.

[0130] In one embodiment, the charging rate is the maximum allowed charging rate of the battery module 200 at the current temperature.

[0131] It should be noted that when the temperature of the battery module 200 changes, the charging rate of the battery module 200 also changes. Here, the "changing charging rate" can be the maximum charging rate allowed by the battery module 200 at the current corresponding temperature; or it can be a certain charging rate selected within the capacity range of the battery module 200 at the corresponding temperature. In this embodiment, in order to improve the charging speed of the battery module 200, the control module determines the maximum allowed charging rate of the battery module 200 at the current temperature as the charging rate of the battery module 200 according to the temperature of the battery module 200.

[0132] Based on this, the application provides a charging system 10, comprising a battery module 200, a charging device 100, a temperature adjusting module, a temperature detecting module and a control module, the control module is configured to control the working of the temperature adjusting module according to the temperature of the battery module 200; when the temperature of the battery module 200 is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; when the temperature of the battery module 200 is not less than an allowed charging temperature threshold, the charging device 100 starts charging the battery module 200; the control module is further configured to determine the charging rate of the battery module 200 according to the temperature of the battery module 200; the charging device charges the battery module at the charging rate; wherein the charging rate changes with the change of the temperature of the battery module 200, and the charging rate is the maximum allowed charging rate of the battery module 200 at the current temperature.

[0133] By setting the charging rate as the maximum allowed charging rate of the battery module 200 at the current temperature, the parameter characteristics of the battery module 200 in different temperature intervals are fully utilized, and the temperature parameter is accurately adjusted and utilized, so that the charging device 100 can charge the battery module 200 at the optimal charging rate in real time while changing the temperature to resist cold temperature, greatly improving the charging efficiency of the charging system 10 and expanding the application scenarios of the charging system 10.

[0134] In some embodiments, when the temperature of the battery module 200 is not greater than the first charging temperature threshold, the charging rate of the battery module 200 increases with the increase of the temperature of the battery module 200; when the temperature of the battery module 200 is greater than the first charging temperature threshold, the charging rate of the battery module 200 decreases with the increase of the temperature of the battery module 200.

[0135] Specifically, the charging rate of the battery module 200 has a certain corresponding relationship with the temperature of the battery module 200. In one embodiment, as the temperature rises, the charging rate of the battery module 200 presents a change trend of first increasing and then decreasing, and reaches the highest at the first charging temperature threshold. This change trend conforms to the charging characteristics of battery materials at different temperatures, can fully utilize the charging characteristics of the battery module, and improve the charging efficiency of the battery module.

[0136] For example, in one embodiment, the battery module 200 cannot be charged below-10℃, can be charged at 1C charging rate between-10℃ and 5℃, can reach 2C charging rate at 5℃, gradually increases the charging rate to 10C between 5℃ and 17℃, and continues to charge at 10C until the charging rate gradually decreases after 55℃.

[0137] In another embodiment, the battery module 200 cannot be charged below 0℃, can be charged at 1C rate between 0℃ and 7℃, can be charged at 2C rate between 7℃ and 15℃, can be charged at 6C rate between 15℃ and 65℃, and the charging rate gradually decreases after 65℃.

[0138] Since the charging characteristics of different battery materials are different, for the above correspondence, the specific battery material can be selected to make full use of the performance of the battery material, and the application does not limit this.

[0139] Optionally, the battery module 200 can also be provided with a storage unit to store the temperature and charging rate correspondence of the battery module. Optionally, the storage unit is a separate module, or can be integrated into the battery control module 260.

[0140] In some embodiments, the charging rate of the battery module 200 changes in real time with the temperature of the battery module 200, that is, the correspondence between the charging rate and the temperature is a continuously changing curve. Of course, in order to facilitate implementation, sometimes the charging rate of the battery module 200 does not always change in real time with the temperature of the battery module 200 in engineering operation. For example, during the temperature rise of the battery module 200, a plurality of temperature intervals can be included, and a corresponding charging rate is set for each temperature interval. Specifically, in some embodiments, when the temperature of the battery module 200 is in a first temperature interval, the charging rate of the battery module 200 is a first constant charging rate; when the temperature of the battery module 200 is in a second temperature interval, the charging rate of the battery module 200 is a second constant charging rate.

[0141] It can be understood that each of the above temperature intervals also follows the above increasing and then decreasing change trend. For example, if five temperature intervals are set, which are first to fifth temperature intervals, and the temperature increases; wherein the first charging temperature threshold is the left temperature endpoint value of the third temperature interval, and the first to fifth temperature intervals correspond to the first to fifth charging rates respectively. The size relationship of the first to fifth charging rates is first charging rate < second charging rate < third charging rate, and fifth charging rate < fourth charging rate < third charging rate. Among them, there is no certain size relationship between the first charging rate and the second charging rate and the fourth charging rate and the fifth charging rate, and the size relationship is determined by the selection of each temperature interval and the battery material of the battery module 200, etc.

[0142] It should be noted that in some temperature intervals, the change of the charging rate corresponding to the temperature change of the battery module 200 is small, and frequent changes of the charging rate have little practical significance, so a constant charging rate can be set in the temperature interval, which can ensure that the charging rate of the battery module 200 can change with the change of temperature, and can also avoid the battery module 200 to frequently charge request or unnecessary charging rate adjustment, reduce the calculation amount of the control module, and reduce the cost of components and production under the premise of ensuring the function.

[0143] Optionally, the temperature range included in each temperature interval can be the same or different. For example, the first temperature interval is 0-3℃, the second temperature interval is 3-6℃, and so on. For example, the first temperature interval is 0-3℃, the second temperature interval is 3-8℃, and so on. The setting of the temperature range of each temperature interval can be set according to the battery characteristics of the battery module 200, actual operation habits, actual needs, etc., which is not limited by the present application.

[0144] It can be understood that, optionally, the first charging temperature threshold can be a temperature threshold interval, and when the temperature of the battery module is not greater than the low value of the temperature threshold interval, the charging rate of the battery module 200 increases with the increase of the temperature of the battery module 200, and when the temperature of the battery module 200 is greater than the high value of the temperature threshold interval, the charging rate of the battery module 200 decreases with the decrease of the temperature of the battery module 200.

[0145] It should be noted that when the temperature range of the temperature interval is small enough and the number of temperature intervals is enough, the charging rate of the battery module 200 changes in real time with the temperature of the battery module 200. At this time, the first charging temperature threshold is a point value, that is, at this temperature point, the battery module 200 reaches the maximum charging rate in the charging process, that is, the second charging rate.

[0146] Further, in some embodiments, the first charging temperature threshold is less than the over-temperature protection temperature threshold of the battery module 200; wherein the temperature difference between the first charging temperature threshold and the over-temperature protection temperature threshold is not less than 5℃.

[0147] It should be noted that if the first charging temperature threshold of the battery module 200 is greater than the over-temperature protection threshold, it means that the battery module 200 has reached the over-temperature protection threshold before reaching the maximum charging rate, and the charging rate is low during the charging process, which will affect the charging efficiency, so it is less used in actual scenarios. On the contrary, if the first charging temperature threshold is less than the over-temperature protection threshold, when the temperature of the battery module 200 reaches the first charging temperature threshold, the charging rate of the battery module 200 also reaches the maximum, at least ensuring that the battery module 200 can be charged at the maximum charging rate. Further, by controlling the temperature of the battery module 200 to avoid entering the over-temperature protection, the charging time of the battery module 200 at the maximum charging rate can be maintained.

[0148] Therefore, in order to further improve the charging efficiency, the battery module 200 should be controlled to charge at the maximum charging rate for as long as possible, and theoretically, the longer this time, the higher the overall charging efficiency of the battery module 200. However, when the charging rate of the battery module 200 is large, the heat generated during charging will cause the temperature of the battery module 200 to continuously rise, and even over-temperature protection may occur. Therefore, a preset temperature interval needs to be reserved to provide a buffer interval for the temperature rise of the battery module 200, thereby avoiding over-temperature of the battery module 200.

[0149] When the first charging temperature threshold is a temperature point value, the reserved preset temperature interval, i.e. the temperature difference between the first charging temperature threshold and the over-temperature protection temperature threshold, is not less than 5℃. In some embodiments, the first charging temperature threshold is a temperature threshold interval, and the reserved temperature interval is determined by the high value of the temperature threshold interval and the over-temperature protection threshold, i.e. the temperature difference between the high value of the first charging temperature threshold and the over-temperature protection temperature threshold is not less than 5℃.

[0150] It can be understood that the temperature threshold interval of the first charging temperature threshold of some battery modules with some cell materials has a large range, and selecting the high value of the temperature threshold interval for reserving the preset temperature interval makes the time for the battery module 200 to charge at the maximum charging rate longer, and the time for heating also longer, so that the battery module 200 can be heated to a higher temperature, and even after stopping heating, the temperature of the battery module 200 can be maintained at a relatively optimal charging rate temperature interval for a longer time.

[0151] The first charging temperature threshold and the over-temperature protection temperature threshold of the battery module 200 are usually closely related to the cell material thereof, and therefore temperature setting also needs to be made according to the temperature characteristics of the cell material.

[0152] With the first charging temperature threshold of 15°C, and the maximum charging rate of 6C of the battery module 200 can be reached when the temperature is between 15°C and 65°C, and the over-temperature protection threshold of 70°C, when the battery module 200 is continuously charged at 6C, the temperature rise of the battery module 200 caused by charging is generally not more than 20°C from the start of charging to 20 minutes, at this time the battery module 200 can be fully charged to 80%, and the over-temperature protection threshold is not reached, so the temperature interval of 5°C reserved can meet the demand. In some embodiments, when the battery module 200 is continuously used, i.e. repeatedly charged and discharged, at least 3 times or more under this condition.

[0153] By reserving a preset temperature interval for the battery module 200, the battery module 200 can be charged at the maximum charging rate for a longer time without being affected by over-temperature, effectively improving the charging efficiency of the battery module 200, and greatly improving the user experience.

[0154] Generally, when the temperature of the battery module is low and needs to be charged, the working process of the charging device 100 charging the battery module 200 is: first heating the battery module to rapidly increase the temperature of the battery module, and starting charging after the temperature of the battery module reaches the allowed charging temperature threshold, so that the battery module can be charged at a faster charging rate, until the battery module 200 is fully charged to 80% of the rated capacity, and then the battery module 200 is fully charged. Based on this, when the charging system 10 is in a cold working environment, the working process of the charging device 100 charging the battery module 200 includes at least two time periods, the first time period is the heating time T1 required for the battery module 200 to start heating to start charging, and the second time period is the charging time T2 required for the battery module 200 to start charging to 80% of the rated capacity. Of course, the working process also includes the time period from the battery module 200 being charged to 80% of the rated capacity to being fully charged.

[0155] Specifically, during the heating time T1 from the start of heating to the start of charging of the battery module, only heating is performed in the charging system without charging; during the period from the start of charging to the battery module being charged to 80% of the rated capacity, at least charging operation is performed in the charging system. Seeking a reasonable balance between temperature regulation and charging control means that the heating time T1 is controlled so that the battery module 200 is quickly warmed up into a suitable temperature range, and the charging rate in the charging time T2 is matched to maximize the charge-discharge performance of the battery module 200, so as to effectively improve the charge-discharge efficiency of the battery module 200 and improve the user experience.

[0156] In one embodiment, when the temperature of the battery module 200 is not less than the second charging temperature threshold, the control module is configured to determine the charging rate of the battery module 200 as a first charging rate, which is not less than 2C; wherein during the charging process from starting charging by the charging device 100 to the battery module 200 to 80% of the rated capacity of the battery module 200, the time of the charging rate not less than 2C is not less than 8 minutes.

[0157] It can be understood that the charging time required for the battery module 200 to start charging to 80% of its rated capacity can also be divided into two time periods, one is the time T3 of charging and heating to the second charging temperature threshold, and the other is the time T4 of charging at a charging rate not less than 2C when the temperature is greater than the second charging temperature threshold. During the time T3, the amount of electricity charged into the battery module 200 is not only related to the charging rate of the battery module, but also related to the temperature rising rate of the battery module 200. In this stage, the temperature of the battery module 200 is low, and the charging rate is also relatively small, so the charging efficiency is low in this stage, and the charging time is long. During the time T4, the charging rate of the battery module 200 is greatly improved, so the charging time is more affected by the charging rate, and ensuring the charging time of this stage can effectively improve the charging efficiency. Therefore, in order to ensure that the battery module 200 can be charged to 80% of its rated capacity as soon as possible, at least the charging time T4 of the charging rate not less than 2C should be ensured. When the time of charging at a charging rate not less than 2C is not less than 8 minutes, even if the charging is only at a charging rate of 2C, at least 25% of the rated capacity of the battery module 200 can be charged. When the charging rate is 4C or even more than 6C, 8 minutes can charge more than 60% of the rated capacity, thereby ensuring that the charging efficiency of the charging system 10 meets the demand.

[0158] Based on this, the application provides a charging system 10, which comprises a battery module 200, a charging device 100, a temperature adjusting module, a temperature detecting module and a control module. The control module is configured to control the working of the temperature adjusting module according to the temperature of the battery module 200; when the temperature of the battery module 200 is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; when the temperature of the battery module 200 is not less than an allowed charging temperature threshold, the charging device 100 starts charging the battery module 200; the control module is further configured to determine the charging rate of the battery module 200 according to the temperature of the battery module 200; the control module is further configured to determine the charging rate of the battery module according to the temperature of the battery module 200, which changes with the change of the temperature of the battery module 200; by setting the first charging rate when the temperature of the battery module 200 is not less than a second charging temperature threshold to be not less than 2C, so that during the charging process from the start of charging the battery module 200 by the charging device 100 to the charging of the battery module 200 to 80% of the rated capacity, the time of the charging rate not less than 2C is not less than 8 minutes; the second charging temperature threshold is greater than the allowed charging temperature threshold. In this way, the charging time of the battery module at a charging rate of 2C or above is ensured, the charging efficiency of the charging system 10 is effectively improved, the charging time demand of the charging system 10 in a low-temperature environment is met, and the user experience is improved.

[0159] In one embodiment, the charging device 100 comprises a storage energy charging device, the storage energy charging device comprises a storage energy power supply, the discharge rate of the storage energy power supply is not less than 2C; when the battery module is charged by using the storage energy charging device, the charging time T2 required from the start of charging to the charging of the battery module 200 to 80% of the rated capacity is not longer than 40 minutes.

[0160] The charging time of the battery module 200 is usually also related to the output power of the charging device 100. When the output power of the charging device can reach the charging power required by the 2C charging rate of the battery module, the charging time T2 required from the start of charging to the charging of the battery module 200 to 80% of the rated capacity is not longer than 40 minutes.

[0161] In one embodiment, the charging device 100 comprises a storage energy charging device, the storage energy charging device comprises a storage energy power supply, the output power of the storage energy power supply is not less than 2000W, and the power watt-hour of the battery module 200 is not less than 1000Wh; when the battery module 200 is charged by using the storage energy charging device, the charging time T2 required from the start of charging to the charging of the battery module 200 to 80% of the rated capacity is not longer than 25 minutes.

[0162] It can be understood that the charging device is usually powered by the mains power, and the power of the mains power is limited, so the charging rate that can be provided to the battery module 200 for charging is also limited accordingly. The energy storage type charging device uses an energy storage power supply as a power supply, which can solve the problem of limited power. When the energy storage power supply charges the battery module 200 at least 2C, or for an energy storage power supply with an output power of not less than 2000W, the battery module 200 with a power of 1000Wh can be provided with a charging rate of at least 2C. In the extreme case, it can be charged to 80% of the rated capacity of the battery module 200 in at most 24 minutes.

[0163] By using the energy storage type charging device, the problem of limited mains power is effectively solved, and the charging efficiency of the battery module 200 can be improved by selecting an energy storage power supply with a larger output power, thereby greatly improving the charging efficiency of the charging system 10.

[0164] In order to further improve the charging efficiency, it is also necessary to consider how to reduce the heating time T1 required by the battery module 200 before starting charging.

[0165] In one embodiment, the control module is configured to control the operation of the temperature adjusting module according to the temperature of the battery module 200, so that the heating time T1 required from starting heating of the battery module 200 to starting charging of the battery module 200 is not longer than 20 minutes.

[0166] Specifically, when the temperature of the battery module 200 is low, the temperature difference to be warmed up is obtained according to the current temperature of the battery module 200 and the allowable charging temperature threshold of the battery module 200, and then the operation of the temperature adjusting module 200 is controlled. The operation of the temperature adjusting module at least includes starting, stopping and adjusting the temperature of the temperature adjusting module. By controlling the temperature adjusting module, the temperature of the battery module 200 is regulated, thereby effectively saving the heating time. Generally, in order to improve user experience and the cycle use efficiency of the battery pack, the total charging time of the battery module 200 should not be too long. In this embodiment, the heating time T1 required from starting heating of the battery module 200 to starting charging of the battery module 200 is not longer than 20 minutes.

[0167] In one embodiment, when the temperature of the battery module 200 is not less than the second charging temperature threshold, the control module is configured to determine that the charging rate of the battery module 200 is a first charging rate, and the first charging rate is not less than 2C; wherein the charging time T2 required by the charging device 100 to start charging the battery module 200 to 80% of the rated capacity of the battery module 200 is not more than 40 minutes.

[0168] In other words, it is the total time of T3+T4. In T3 time, as the temperature of the battery module 200 rises, the charging device 100 charges the battery module 200 with a certain amount of electricity, and the battery module 200 is allowed to charge to reach the fast charging temperature. The T3 time is generally short, usually no more than 15 minutes; in T4 time, when the charging device 100 charges the battery module 200 at a charging rate of at least 2C, the battery module 200 can be charged from empty to 80% of its rated capacity in at most 24 minutes; by jointly adjusting the temperature control module and the charging rate of the battery module 200, T3 and T4 are coordinated, and the charging time T2 required for the battery module 200 to start charging to 80% of the rated capacity of the battery module 200 is not more than 40 minutes, so as to meet the time requirement of low-temperature charging.

[0169] For example, if the capacity of the battery module 200 is 4Ah, the charging is allowed at 0°C, and the charging is at 1C between 0-8°C, and the average heating rate of the battery module 200 is 0.8°C / min, it takes 10 minutes to heat to 8°C, and during this period the battery module 200 is charged to 1 / 6 of the rated capacity; when it exceeds 8°C, it is charged at not less than 2C, and if it is charged to 80% of the rated capacity, there is still 19 / 30 (4 / 5-1 / 6) of the rated capacity to be charged, and it takes 19 minutes to charge at 2C. That is, in the entire process, the charging time required from starting charging to charging to 80% of the rated capacity is 10+19=29 minutes. Both 19 minutes and 29 minutes can meet the charging efficiency requirement.

[0170] In some embodiments, during T4 time, the battery module 200 can be charged at a charging rate of more than 10C, and it can be fully charged to 80% of the rated capacity in 5 minutes or less. When the power of the temperature adjustment module is large, the heating time can also be controlled within 10 minutes, so that the charging time T2 required for the battery module to start charging to fully charge to 80% of the rated capacity is not less than 15 minutes.

[0171] Based on this, the application provides a charging system, comprising: a battery module, a charging device, a temperature adjusting module, a temperature detecting module and a control module; wherein the control module is configured to control the operation of the temperature detecting module according to the temperature of the battery module; when the temperature of the battery module 200 is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; when the temperature of the battery module 200 is not less than an allowed charging temperature threshold, the charging device 100 starts charging the battery module 200; the control module is further configured to determine the charging rate of the battery module 200 according to the temperature of the battery module 200, and the charging device 100 charges the battery module 200 at the charging rate; wherein the ratio of the heating time T1 required for the battery module 200 from starting heating to starting charging of the battery module 200 to the charging time T2 required for the battery module 200 from starting charging to being filled to 80% of the rated capacity is between 0.1 and 2.5.

[0172] In some embodiments, the heating time T1 required for the battery module 200 from starting heating to starting charging of the battery module is not greater than 20 minutes, the charging time T2 required for the battery module 200 from starting charging to being filled to 80% of the rated capacity is not greater than 40 minutes, and the value range of T1+T2 is 20 minutes-60 minutes.

[0173] Through reasonable coordination of the heating time T1 and the charging time T2, the influence of low temperature on the charging system can be effectively alleviated, and the corresponding relationship between the temperature of the battery module and the charging rate can be reasonably utilized, which avoids both the low charging rate when the temperature is too low and the charging stop caused by too high temperature, thereby effectively saving the charging time, improving the charging efficiency, ensuring the safety and reliability, and greatly improving the user experience.

[0174] One of the main influencing factors of the temperature adjusting module is the power value. In some embodiments, the temperature adjusting module comprises a temperature adjusting element, and the temperature adjusting element for heating can comprise a heating film, a resistance wire, etc. For the same material of the temperature adjusting element, the greater the power is, the greater the corresponding thickness or volume is. When the battery module 200 is used as a battery pack, it is usually held or carried by the user, and the compactness of the product structure is required to be high for the convenience of carrying. When selecting, the actual structural design of the battery module 200 also needs to be considered, so the temperature adjusting element is usually selected after considering multiple factors such as power, volume, thickness and cost, and some power values are usually lost. For example, a heating film with medium power and thin thickness is selected. Alternatively, the power value of the temperature adjusting module can be 30W-500W. Alternatively, the power value of the temperature adjusting module is 40W-200W. Alternatively, the power value of the temperature adjusting module is 45W. Alternatively, the power value of the temperature adjusting module is 120W.

[0175] In some embodiments, the power of the temperature adjusting module and the number of battery cells of the battery module are set such that the average temperature rising rate of the battery module 200 is not greater than 5℃ / min within the heating time T1.

[0176] wherein the average temperature rising rate of the battery module 200 is the temperature difference to be raised / heating time T1. Specifically, the temperature difference to be raised is the temperature difference between the temperature of the battery module 200 and the start charging temperature of the battery module 200 (the allowable charging temperature threshold). The heating time T1 is the time required from the start of heating of the battery module 200 to the start of charging of the battery module 200. In an embodiment, when the battery module 200 starts heating, the control module starts timing, when the battery module 200 starts charging, the control module stops timing, and the time between the start and the stop is obtained, i.e. T1.

[0177] Here, the temperature of the battery module 200 can be obtained in various ways. Alternatively, the temperature detected by the temperature detecting element arranged on the battery module 200 is directly taken as the temperature of the battery module 200, or the temperature detected by the temperature detecting element is preliminarily processed by the control module and then taken as the temperature of the battery module 200, etc. The present application does not limit this.

[0178] Generally speaking, the most direct factor affecting the temperature rising rate of the battery module 200 is the power value of the temperature adjusting module. The greater the power value of the temperature adjusting module, the more heat applied to the battery module 200, and the higher the average temperature rising rate of the battery module 200. When the number of battery cells of the battery module 200 is large, i.e. the number of objects to be heated is large, the average temperature rising rate will also be affected to a certain extent. As can be seen, the main factors affecting the average temperature rising rate of the battery module 200 include the power of the temperature adjusting module and the number of battery cells of the battery module 200.

[0179] In some embodiments, the ratio of the power of the temperature adjusting module to the number of battery cells is in the range of 3W / cell-30W / cell.

[0180] It can be understood that, in order to avoid excessive influence on the average temperature rising rate of the battery module 200, the power of the temperature adjusting module should be matched with the number of battery cells. The number N of battery cells of the battery module 200 is in the range of 1-30 cells or groups; alternatively, the number of battery cells is in the range of 3-15 cells or groups; alternatively, the number of battery cells is 15 cells or groups. Each group of battery cells can include at least one battery cell.

[0181] For the battery pack already held by the user, the number of battery cells is relatively fixed, and the higher the power value of the temperature adjustment module, the higher the average temperature rising rate of the battery module. Considering the power supply of the charging device 100 and the charging power as the main power consumption, the available power for the temperature adjustment module should not be too high, so the temperature rising rate of the battery module 200 should not be too high. In this embodiment, the average temperature rising rate of the battery module 200 is not greater than 2℃ / min.

[0182] Optionally, the average temperature rising rate of the battery module 200 is in the range of 0.5-3℃ / min. Optionally, the average temperature rising rate of the battery module 200 is in the range of 0.5-2℃ / min. Optionally, the average temperature rising rate of the battery module 200 is in the range of 0.6-1℃ / min. By limiting the lower limit and upper limit of the average temperature rising rate of the battery module 200, the temperature rising demand of the battery module 200 can be met, and the normal charging function of the battery module 200 is not affected. This design reasonably coordinates the work between temperature adjustment and charging control.

[0183] Optionally, when the temperature adjustment module only includes the first temperature adjustment module 270 arranged in the battery module 200, the average temperature rising rate of the battery module 200 heated only by the first temperature adjustment module 270 is in the range of 0.5-2℃ / min.

[0184] Optionally, when the temperature adjustment module only includes the second temperature adjustment module 140 arranged in the charging device 100, the average temperature rising rate of the battery module 200 heated only by the second temperature adjustment module 140 is in the range of 0.25-3℃ / min.

[0185] Optionally, when the temperature adjustment module includes both the first temperature adjustment module 270 arranged in the battery module 200 and the second temperature adjustment module 140 arranged in the charging device 100, the average temperature rising rate of the battery module 200 heated by both the first temperature adjustment module 270 and the second temperature adjustment module 140 is in the range of 0.6-5℃ / min.

[0186] It can be understood that when different temperature adjustment modules are equipped in the charging system 10, the average temperature rising rate of the battery module 200 is also different. When the battery module 200 and the charging device 100 are equipped with both the first and second temperature adjustment modules, the temperature of the battery module 200 can be raised the fastest, and the charging efficiency of the charging system 10 can be improved.

[0187] In some embodiments, when the number of battery cells is greater than or equal to 3, the power of the temperature adjustment module is set such that the average temperature rising rate of the battery module 200 is not greater than 2℃ / min within the heating time T1.

[0188] It should be noted that the temperature rising rate of the battery module 200 is not necessarily the higher the better, that is, it is not too high, nor too low. When the temperature rising rate is too high, the fast temperature rising rate on the one hand leads to a large demand for heating power, to some extent, reduces the available charging power, and affects the charging efficiency; on the other hand, it also leads to an increase in the temperature difference between the cells, causing the imbalance of the performance of the cells, which is easy to damage the battery and affect the charging efficiency. Correspondingly, if the temperature rising rate is too low, the battery module 200 rises very slowly, and it is also difficult to meet the demand of saving charging time. Therefore, it is also necessary to set a reasonable and effective interval for the temperature rising rate. The researchers comprehensively study the characteristics of the cells, the temperature, the temperature rising rate, the temperature difference, the cell form, the cell arrangement structure, the structural design of the battery module 200, the coordinated work of the battery module 200 and the charging device 100 and other aspects, in order to realize the reasonable and effective adjustment of the temperature adjusting module, and finally obtain the above-mentioned reasonable and effective temperature rising rate interval, while meeting the dual demands of charging efficiency and charging safety.

[0189] Based on the research on the characteristics of the cells, the researchers obtain various evaluation data of the characteristics of the cells. When the temperature difference is within 5°C, the performance parameters of the cells are still in a reasonable and controllable interval, and can work effectively and safely. Since the battery module determines the charging rate of the smallest charging rate in each cell as the charging rate of the entire battery module, when the temperature difference is large, it will affect the charging rate of the entire battery module and affect the charging efficiency. Therefore, when the temperature difference is greater than 5°C, some charging efficiency may be lost.

[0190] It can be understood that when the number of cells is large, considering the need for compact battery module structure, the distance between the cells is small, and heat is easy to accumulate. At the same time, due to the difference in the setting position, the contact surface of each cell with the temperature adjusting module or with the airflow is greatly different, so the heat generated by the temperature adjusting module may not make the temperature of each cell change uniformly, and the temperature imbalance phenomenon between different cells is more likely to occur. Since the charge and discharge performance of the cells is closely related to the temperature value, when the temperature difference between different cells is large, the charge and discharge performance of each cell also has a large difference. When each cell together constitutes a battery module as a whole, the battery module can only charge and discharge each cell with the same charge and discharge parameter. At this time, this charge and discharge parameter may have a large gap with the charge and discharge performance of part of the cells, which will cause damage to this part of the cells, and is not easy to protect the battery. Therefore, in order to avoid the temperature imbalance phenomenon, when the number of cells is large, the average temperature rising rate of the battery module 200 needs to be further limited.

[0191] In this embodiment, when the number of battery cells is greater than or equal to 3, the average temperature rise rate of the battery module 200 within the heating time T1 is not greater than 2°C / min, which not only meets the temperature rise requirement of the battery module 200 and enables the battery module 200 to be quickly charged within a reasonable temperature range, but also avoids damage to the battery cell group caused by too fast temperature rise, effectively improves the use safety of the battery module 200, and prolongs the service life of the battery module 200 to a certain extent.

[0192] It can be understood that, in some embodiments, the temperature rise rate of the battery module 200 can vary in real time with temperature or can be a fixed value, which is not limited in the present application.

[0193] In the battery module 200, a plurality of temperature detection elements are usually arranged at different parts of the battery cells to detect the temperatures of the battery cells at different positions. The control module is electrically connected with each temperature detection element to obtain the temperature values detected by each temperature detection element. When the control module determines that the temperatures at any two positions are greater than a preset temperature threshold, it is determined that the temperature imbalance phenomenon occurs in the battery cells.

[0194] In order to alleviate or avoid the temperature imbalance of the battery module 200, in some embodiments, the battery module is further configured to, when the temperature difference between any two positions of the battery module 200 is greater than a preset temperature difference threshold, reduce the supply voltage of the temperature adjustment module and / or disconnect the power supply of the temperature adjustment module.

[0195] Specifically, when the temperature difference between any two positions of the battery module 200 is greater than a preset temperature difference threshold, it means that the temperature imbalance occurs in the battery module 200. The preset temperature difference threshold can be set according to the characteristics of the battery cells, for example, the preset temperature difference threshold can be the maximum temperature difference value that can be tolerated by each battery cell of the battery module 200, or a set temperature difference value less than the maximum temperature difference value. When the preset temperature difference threshold is the maximum temperature difference value of the battery module 200, in order to avoid the temperature difference of the battery module 200 from further expanding, the control module can control to disconnect the power supply of the temperature adjustment module; and when the preset temperature difference threshold is a temperature difference value less than the maximum temperature difference value, the temperature difference of the battery module 200 can still have a certain relief interval, and the control module can also control to reduce the supply voltage of the temperature adjustment module to reduce the heat output of the temperature adjustment module, thereby alleviating the temperature difference between the battery cells. Of course, the control module can also control to first reduce the supply voltage of the temperature adjustment module and then disconnect the power supply thereof. The specific setting mode is not limited in the present application.

[0196] Further, in some embodiments, the temperature adjustment module comprises at least two temperature elements, which are connected in series or in parallel; when the temperature difference between any two places of the battery module 200 is greater than the preset temperature difference threshold, the control module is configured to, in the case of series connection of the at least two temperature elements, control the power supply voltage of all temperature adjustment elements to be reduced and / or the power supply of all temperature adjustment elements to be turned off; in the case of parallel connection of the at least two temperature elements, control the power supply voltage of at least one temperature adjustment element to be reduced and / or the power supply of at least one temperature adjustment element to be turned off.

[0197] It should be noted that the at least two temperature elements of the temperature adjustment module can be distributed at different positions of the battery module 200 and / or the charging device 100. When the at least two temperature elements are connected in series, the control module can only control the voltage across the at least two temperature elements at the same time, i.e., control the power supply of all temperature adjustment elements to be turned off and / or reduced. When the at least two temperature elements are connected in parallel, each temperature element can be independently controlled, so the control module can selectively control the power supply of at least one temperature adjustment element to be turned off and / or reduced. For example, when the temperature adjustment module is provided with three temperature adjustment elements, the control module can selectively turn off and / or reduce the power supply of only one temperature adjustment element provided at the highest temperature, while maintaining the power supply of the other two temperature adjustment elements. Of course, the control module can also selectively turn off the power supply of the temperature adjustment element provided at the highest temperature, and reduce the power supply of the temperature adjustment element provided at the medium temperature, while maintaining the power supply of the temperature adjustment element provided at the lowest temperature. The number of temperature adjustment elements, the series-parallel connection mode, and the unbalanced control mode are not limited in the present application, and the product can be set based on actual needs.

[0198] Of course, when the temperature imbalance occurs, the control module can also set the control mode of each temperature adjustment element according to the actual preset temperature difference threshold and the series-parallel connection mode of the temperature adjustment module. By considering the preset temperature difference threshold and the hardware structure of the temperature adjustment element, the accuracy of temperature adjustment of the battery module is improved, and the flexibility of temperature adjustment is also effectively improved.

[0199] In order to further alleviate or avoid the temperature imbalance of the battery module 200, in addition to the control by the control module, the position distribution and structure of the temperature adjustment module can also be designed.

[0200] In some embodiments, the temperature adjustment module comprises a first temperature adjustment module 270 arranged in the battery module 200. The first temperature adjustment module 270 comprises at least a first temperature adjustment element and a second temperature adjustment element, which are arranged between the battery cells 240 at intervals; the first temperature adjustment element is arranged in a first battery cell region, and the second temperature adjustment element is arranged in a second battery cell region, which is closer to the center of the battery cell group 230 than the first battery cell region; the heating power value of the first temperature adjustment element is not less than that of the second temperature adjustment element.

[0201] When the temperature of the battery module 200 is unbalanced, the temperature of the center of the battery cell group is usually higher than that of the outer side of the battery cell group. Therefore, in this case, the battery cell group can be divided into at least two battery cell regions from its edge to the center, for example, a first battery cell region and a second battery cell region in turn from its edge to the center. Accordingly, the first temperature adjustment element with a higher heating power value is arranged in the first battery cell region with a lower temperature, and the second temperature adjustment element with a lower heating power value is arranged in the second battery cell region with a higher temperature. Of course, when the battery cell group is divided into more battery cell regions from its edge to the center, the temperature adjustment elements with decreasing heating power values can be arranged in turn from its edge to the center. In this way, the temperature difference between the center and the outer side of the battery cell group can be neutralized, so that the temperature inside and outside the battery cell group is consistent, and the working capacity and safety performance of the battery cell group are improved.

[0202] Similarly, in addition to arranging temperature adjustment elements with different power values, temperature adjustment elements with the same power value can also be arranged in the same region.

[0203] In some embodiments, the temperature adjustment module comprises a first temperature adjustment module 270 arranged in the battery module; the first temperature adjustment module 270 comprises at least a third temperature adjustment element and a fourth temperature adjustment element, wherein the third temperature adjustment element and the fourth temperature adjustment element are arranged between the battery cells 240 at intervals, and the heating power values of the third temperature adjustment element and the fourth temperature adjustment element are the same; at least one third temperature adjustment element is arranged in a third battery cell region, and at least one fourth temperature adjustment element is arranged in a fourth battery cell region, which is closer to the center of the battery cell group than the third battery cell region; the density of the third temperature adjustment elements arranged in the third battery cell region is not less than that of the fourth temperature adjustment elements arranged in the fourth battery cell region.

[0204] Specifically, the battery cell group can be divided into at least two battery cell regions from its edge to center, for example, the third battery cell region and the fourth battery cell region from its edge to center. Accordingly, for the third battery cell region with lower temperature, the third temperature adjusting element with higher number density is arranged, and for the fourth battery cell region with higher temperature, the fourth temperature adjusting element with lower number density is arranged, so that the heating heat in the third battery cell region will be greater than that in the fourth region. Of course, when the battery cell group is divided into more battery cell regions from its edge to center, the temperature adjusting elements with decreasing number density can be arranged in sequence from its edge to center. In this way, the temperature difference between the center and the outside of the battery cell group can be neutralized, so that the temperature inside and outside the battery cell group is consistent, and the working capacity and safety performance of the battery cell group are improved.

[0205] In the charging system 10, in some embodiments, the control module controls the temperature adjusting module to heat the battery module 200 according to the temperature of the battery module 200; the control module determines the charging rate of the battery module according to the temperature of the battery module, and the charging device 100 charges the battery module 200 at the charging rate; wherein the product of the average temperature rising rate of the battery module 200 within the heating time T1 and the real-time charging rate of the battery module 200 ranges from 2 ℃*Ah / min to 700 ℃*Ah / min.

[0206] Based on this, the application provides a charging system 10, comprising: a battery module, a charging device, a temperature adjusting module, a temperature detection module and a control module; wherein the control module is configured to control the operation of the temperature detection module according to the temperature of the battery module; when the temperature of the battery module 200 is not greater than the first heating temperature threshold, the control module controls the temperature adjusting module to start heating; when the temperature of the battery module 200 is not less than the allowable charging temperature threshold, the charging device 100 starts charging the battery module 200; the control module is further configured to determine the charging rate of the battery module 200 according to the temperature of the battery module 200, and the charging device 100 charges the battery module 200 at the charging rate; wherein the product of the average temperature rising rate of the battery module 200 within the heating time T1 required from starting heating to starting charging and the real-time charging rate of the battery module ranges from 2 ℃*Ah / min to 700 ℃*Ah / min.

[0207] By reasonably setting and power controlling the temperature adjusting module, the average temperature rising rate of the battery module 200 is adjusted to raise the temperature, and the charging rate of the battery module is adjusted in real time according to the temperature, so that the battery module realizes high-speed safe charging.

[0208] In some embodiments, the application also provides a charging system 11, comprising a battery module 200 and a charging device 100; the battery module 200 comprises a first battery module 200a and a second battery module 200b, the first battery module 200a comprises a first temperature adjusting module 260 configured to adjust the temperature of the first battery module 200a; the charging device 100 comprises a first charging device 100a, the first charging device 100a comprises a first charging device housing, a first battery pack mounting portion and a second temperature adjusting module 140, the first battery pack mounting portion is arranged on the first charging device housing and is configured to detachably connect the first battery module 200a, the second temperature adjusting module 140 is arranged on the first charging device housing and is configured to adjust the temperature of the first battery module 200a; wherein the first charging device 100a is configured to provide a charging current and a heating current to the first battery module 200a, and the first charging device 100a is further configured to provide a charging current to the second battery module 200b.

[0209] Specifically, when the first battery module 200a is connected to the first charging device 100a, the first charging device 100 can provide both a charging current to perform a charging operation and a heating current to power the first temperature adjusting module for the first battery module 200a; when the second battery module 200b is connected to the first charging device 100a, the first charging device 100a can provide a charging current to perform a charging operation for the second battery module 200b. In short, the first charging device 100a provided with the second temperature adjusting module 140 can be compatible with both the first battery module 200a provided with the first temperature adjusting module 270 and the second battery module 200b without the first temperature adjusting module 270. Thus, no matter which battery module the first charging device 100a is connected to, it can work with it, ensuring that at least one device in the charging system has a temperature adjusting function when any combination is made, which expands the applicable scenarios of the first charging device 100a. In a special scenario, for example, when a user already has some old second battery modules 200b and purchases a new first charging device 100a and a new first battery module 200a, the first charging device 100a can work with both the newly purchased new first battery module 200a and the existing second battery module 200b, thereby avoiding the situation that the old second battery module 200b cannot be used and is idle. For users, the new first battery module 200a is not necessarily purchased, which reduces the user's use cost.

[0210] In this embodiment, there are two matching modes, the first is that the first charging device 100a is connected to the first battery module 200a to work, and the second is that the first charging device 100a is connected to the second battery module 200b to work. The working processes of the two matching modes will be described in detail below.

[0211] When the first charging device 100a is connected to the first battery module 200a, as shown in FIG. 10, the first battery module 200a includes a battery control module 260 and a first temperature adjustment module 270, and the first charging device 100a includes a charging device control module 160 and a second temperature adjustment module 140.

[0212] In some embodiments, when the temperature of the first battery module 200a is not greater than the first heating temperature threshold, in response to a request instruction of the first battery module 200a, the first charging device 100a provides a heating current and a charging current to the first battery module 200a, and the first temperature adjustment module 270 starts heating; the first charging device 100a receives communication information representing the temperature of the first battery module 200a from the first battery module 100a; when the temperature of the first battery module 100a is not greater than the third heating temperature threshold, the first charging device 100a provides a heating current to the second temperature adjustment module 140, and the second temperature adjustment module 140 starts heating.

[0213] It can be understood that in the present embodiment, when the temperature of the first battery module 200a is low, the first temperature adjustment module 270 and the second temperature adjustment module 140 can work at the same time, and both are provided with a heating current by the first charging device 100a.

[0214] Specifically, when the first battery module 200a is connected to the first charging device 100a, the battery control module 260 establishes communication with the charging device control module 160 to transmit communication information. The temperature detection module detects the temperature of the first battery module 200a, and the battery control module 260 determines whether the detected temperature of the first battery module 200a is not greater than the first heating temperature threshold, and sends a request instruction to the charging device control module 160; at the same time, the battery control module 260 also sends communication information representing the temperature of the first battery module 200a, such as a specific temperature value or a control instruction representing the temperature value, to the charging device control module 160 for charging and heating control. Alternatively, when the battery control module 260 determines that the first battery module 200a is charging and heating at the same time, the temperature control request parameter value and the charging request parameter value can be integrated into one request parameter value, and sent to the charging device control module 160 as a request instruction.

[0215] Correspondingly, the charging device control module 160 receives the communication information, and provides the power supply current to the first battery module 200a according to the request instruction. If the first battery module 200a only has a heating demand, the battery control module 260 controls the closing of the switching elements Q3 and Q4, and the power supply current is provided to the first temperature adjusting module 270 as the heating current. If the first battery module 200a has both a heating demand and a charging demand, the battery control module 260 controls the closing of Q1, Q2, Q3 and Q4 at the same time, and the power supply current is distributed according to the actual demand, part of which is provided to the first temperature adjusting module 270 as the heating current, and the other part is provided to the battery cell group 230 as the charging current. At the same time, the charging device control module 160 also determines that the temperature of the first battery module 200a is not greater than the third heating temperature according to the temperature value of the first battery module 200a in the communication information, or controls the provision of the heating current to the second temperature adjusting module 140 according to the control instruction in the communication information, which indicates that the temperature of the first battery module 200a is not greater than the third heating temperature, to start the heating work of the second temperature adjusting module 140. In this way, the charging control of the first charging device 100a on the first battery module 200a is realized, and the simultaneous heating of the first temperature adjusting module 270 and the second temperature adjusting module 140 is also realized, which effectively improves the heating efficiency of the charging system 11 and shortens the heating and charging time.

[0216] The charging demand of the first battery module 200a at least includes the charging rate determined by the battery control module 260 according to the temperature of the first battery module 200a. The determination of the charging rate, the setting of the first heating temperature threshold and the third heating temperature threshold, the content and form of the request instruction, etc. can be referred to the foregoing description, which will not be repeated here. The schemes of the various modules, the connection relationship between the various modules, the communication setting and control scheme, the average temperature rising rate of the battery module, the power supply circuit design, the position setting and distribution of the first temperature adjusting module, the control logic, etc. are also applicable to this embodiment, which will not be repeated here.

[0217] It should be noted that the provision of the charging current and the heating current by the first charging device 100a to the first battery module 200a herein refers to the function of providing the charging current and the heating current, and does not limit that the two need to be provided at the same time. They should be provided separately or at the same time according to the specific situation.

[0218] For example, when the temperature of the first battery module 200a is greater than the first temperature threshold, the first temperature adjustment module 270 does not need to be started, and thus the battery control module 260 does not send a request instruction for the first heating temperature module 270 to the first charging device 100a for power supply, but still sends communication information representing the temperature of the first battery module 200a to the charging device control module 160 for charging and heating control, such as controlling whether to start the second temperature adjustment module 140. Therefore, even in the case that the first charging device 100a matches the work of the first battery module 200a, the case that the first temperature adjustment module 270 or the second temperature adjustment module 140 works alone can occur. That is, the first temperature adjustment module 270 and the second temperature adjustment module 140 work simultaneously under certain conditions, and can work alone under certain conditions.

[0219] In some embodiments, when the first temperature adjustment module 270 and the second temperature adjustment module 140 heat simultaneously, the average temperature rising rate of the first battery module 200a within the heating time T1 is not less than 0.6°C / min.

[0220] It can be understood that when heating simultaneously, the first battery module 200a receives heating from both, and the temperature rising rate is higher than that when only one of them heats. By independently setting the lower limit of the average temperature rising within the heating time T1, it is ensured that when the first temperature adjustment module 270 and the second temperature adjustment module 140 heat simultaneously, a better temperature rising result can be achieved to make the user feel a significant improvement in experience.

[0221] Optionally, the average temperature rising rate of the first battery module 200a within the heating time T1 is 0.6-5°C / min.

[0222] Optionally, the average temperature rising rate of the first battery module 200a within the heating time T1 is 1-2°C / min.

[0223] In some embodiments, the heating current provided by the first charging device 100a to the first temperature adjustment module 270 is not greater than the heating current provided to the second temperature adjustment module 140.

[0224] It can be understood that the structure space of the first charging device 100a is generally greater than that of the first battery module 200a, or the first charging device 100a can be provided with multiple battery pack mounting portions 120, that is, there are multiple objects to be heated, and thus the heat required by the first charging device 100a to improve the temperature is higher than that of the first battery module 200a. In order to make the first charging device 100a improve the temperature as soon as possible, a greater heating current is generally provided to the second temperature adjustment module 140 than to the first temperature adjustment module 270.

[0225] In some embodiments, the power of the first temperature adjustment module ranges from 20W to 400W. In some embodiments, the power of the second temperature adjustment module ranges from 20W to 120W. In some embodiments, the power of the second temperature adjustment module ranges from 150W to 360W. In some embodiments, the power of the second temperature adjustment module is 45W, or 50W, or 108W.

[0226] In some embodiments, the power of the second temperature adjustment module ranges from 50W to 800W. In some embodiments, the power of the second temperature adjustment module ranges from 100W to 400W. In some embodiments, the power of the second temperature adjustment module ranges from 100W to 300W.

[0227] In some embodiments, when the first charging device 100a is connected to the second battery module 200b, the first charging device 100a provides a charging current to the second battery module 200b, and when the temperature of the second battery module 200b is not greater than the third heating temperature threshold, the first charging device 100a provides a heating current to the second temperature adjustment module 140, and the second temperature adjustment module 140 starts heating, so that the average temperature rising rate of the second battery module within the heating time T1 is not less than 0.25℃ / min.

[0228] As shown in FIGS. 9-10, when the second battery module 200b is connected to the first charging device 100a, the second battery module 200b includes a battery control module 260, and the first charging device 100a includes a charging device control module 160 and a second temperature adjustment module 140.

[0229] In this embodiment, only the second temperature adjustment module 140 is arranged in the first charging device 100a, and therefore, when the temperature of the second battery module 200b is low, the second temperature adjustment module 140 can also be enabled. Specifically, the battery control module 260 establishes communication with the charging device control module 160 to transmit communication information. The temperature detection module detects the temperature of the second battery module 200b, and the battery control module 260 determines, according to the temperature of the second battery module 200b, that the temperature of the second battery module 200b is not less than the running charging temperature threshold, and sends a request instruction to the charging device control module 160 to request a charging current, wherein the charging current is a charging rate value corresponding to the temperature of the second battery module 200b; at the same time, the battery control module 260 also sends communication information representing the temperature of the second battery module 200b, such as a specific temperature value, or a control instruction representing the temperature value, etc., to the charging device control module 160 for charging and heating control. It should be noted that, since there is no first temperature adjustment module 270 in the second battery module 200b, there is no heating demand, and therefore no temperature control request is sent.

[0230] Correspondingly, the charging device control module 160 receives the communication information, and according to the request instruction in the communication information, provides the power supply current to the second battery module 200b. Since the second battery module 200b only has charging demand, the battery control module 260 controls the closing of the switching elements Q1 and Q2 to charge the power supply current to the battery cell group 230. At the same time, the charging device control module 160 also receives the communication information, and according to the temperature value of the second battery module 200b in the communication information, judges that the temperature value is not greater than the third heating temperature, or according to the control instruction in the communication information indicating that the temperature of the second battery module 200b is not greater than the third heating temperature, controls to provide the heating current to the second temperature adjusting module 140 to start the second temperature adjusting module 140. Thus, the charging of the first charging device 100a to the second battery module 200b is realized, and the control work of the second temperature adjusting module 140 is also realized, which improves the heating efficiency to a certain extent and shortens the heating and charging time.

[0231] It can be understood that since the second temperature adjusting module 140 is only arranged in the first charging device 110a, the average temperature rising rate of the second battery module 200b in the time T1 is slightly reduced. In the embodiment, the average temperature rising rate is not less than 0.25℃ / min. By independently setting the lower limit of the average temperature rising in the heating time T1, a better temperature rising result is achieved as much as possible, and the charging efficiency is improved.

[0232] Optionally, the average temperature rising rate of the second battery module in the heating time T1 is 0.25-2℃ / min.

[0233] Optionally, the average temperature rising rate of the second battery module in the heating time T1 is 0.5-1℃ / min.

[0234] Wherein, the determination of the charging rate, the setting of the first heating temperature threshold and the third heating temperature threshold, the content and form of the request instruction, etc. can refer to the foregoing description, which will not be repeated here. The schemes of the various modules, the connection relationship between the various modules, the communication setting and control scheme, the average temperature rising rate of the battery module, the power supply circuit design, the position setting and distribution of the first temperature adjusting module, the control logic, etc. are also applicable to the present embodiment, which will not be repeated here.

[0235] In some embodiments, the first charging device 100a includes at least two battery pack mounting portions 120; then in the charging system 11, the first charging device 100a can be fully matched with the first battery module 200a to perform work, can perform work on the fully matched second battery module 200b, and can also perform work while matching part of the first battery module 200a and part of the second battery module 200b.

[0236] Specifically, when the first charging device 100a is connected to at least two battery modules 200, each battery module detects its own temperature and other parameters, and sends a request instruction to the first charging device 100a. The temperature of each battery module 200 can be the same, for example, when the battery modules are placed in the environment for a long time without use; the temperature of each battery module 200 can also be quite different, for example, when the battery modules are placed in different environments, or when some battery modules 200 have just finished working and some battery modules 200 have not started working. Therefore, the request instructions sent by each battery module 200 can also be different, including at least one of whether the battery module 200 needs to be heated, whether the battery module 200 allows / needs to be charged, whether the first charging device 100a needs to turn on and / or prohibit the second temperature adjustment module 140, and the like.

[0237] Correspondingly, the first charging device 100a receives the request instructions sent by each battery module 200, and controls the charging, temperature control, and power supply of the second temperature adjustment module of each battery module 200 according to the request instructions. For charging and / or temperature control requests, the first charging device 100a sorts the battery modules 200 that make charging and / or temperature control requests according to a preset priority according to the request instructions, and controls the power supply, i.e., the charging current and / or the heating current, to at least one battery module 200 according to the preset priority. The preset priority includes at least one of the type of the battery module, the order of the battery pack mounting portion, the order of the SOC from high to low or from low to high, the order of the temperature from high to low or from low to high, the order of the insertion, whether there is a temperature control request of the battery module, and the like. It should be noted that the main difference between the request instructions sent by the first battery module 200a and the second battery module 200b is that the first battery module 200a can include a temperature control request, while the second battery module 200b does not include a temperature control request. The first charging device 100a can take whether the temperature control request is included as a judgment condition of the preset priority, or can treat the first battery module 200a and the second battery module 200b equally, which can be set according to actual needs, and the present application is not limited.

[0238] For the control of the second temperature adjustment module, when any request instruction includes a request to turn on the second temperature adjustment module 140, and / or the first charging device 100a determines that the second temperature adjustment module 140 needs to be turned on according to the communication information, the second temperature adjustment module 140 is controlled to be turned on. When the situations of turning on and prohibiting the second temperature adjustment module 140 occur at the same time, the turning on operation is preferentially performed. Alternatively, the second temperature adjustment module 140 can be prohibited for a preset time, and then the turning on operation is performed.

[0239] In the charging system 11, the first charging device 100a is capable of communicating and controlling the power supply of each first battery module 200a and second battery module 200b by setting at least two battery pack mounting parts 120, so as to realize efficient charging of two different battery modules. In particular, when the first battery module 200a and the first charging device 100a simultaneously open the respective temperature adjusting modules, the average temperature rising rate is higher, and thus the charging efficiency is also higher, effectively saving the waiting and use time of the user.

[0240] In some embodiments, the present application also provides a charging system 12, comprising a battery module 200 and a charging device 100; the battery module 200 comprises a first battery module 200a, and the first battery module 200a comprises: a first temperature adjusting module 270 configured to adjust the temperature of the first battery module 200a; the charging device 100 comprises first and second charging devices 100a and 100b; the first charging device 100a comprises: a first charging device housing, a first battery pack mounting part and a second temperature adjusting module 140, the first battery pack mounting part is arranged on the first charging device housing and is configured to detachably connect the first battery module 200a, and the second temperature adjusting module 140 is arranged on the first charging device housing and is configured to adjust the temperature of the first battery module 200a; the second charging device 100b comprises: a second charging device housing and a second battery pack mounting part, the second battery pack mounting part is arranged on the second charging device housing and is configured to detachably connect the first battery module 200a; wherein the first charging device 100a is configured to provide a charging current and a heating current to the first battery module 200a, and the second charging device 100b is configured to provide a charging current and a heating current to the first battery module 200a.

[0241] Specifically, the charging system 10 comprises a first battery module 200a with a first temperature adjusting module 270, a first charging device 100a with a second temperature adjusting module 140, and a second charging device 100b without a temperature adjusting module 140.

[0242] In this embodiment, when the first charging device 100a is connected to the first battery module 200a, the first charging device 100 can not only provide a charging current to the first battery module 200a to perform a charging operation, but also provide a heating current to power the first temperature adjustment module 270, while the first charging device 100 can also control the second temperature adjustment module to work; when the second charging device 100b is connected to the first battery module 200a, the second charging device 100b can provide a charging current to the first battery module 200a to perform a charging operation, and also provide a heating current to power the first temperature adjustment module 270. In short, the first battery module 200a provided with the first temperature adjustment module 270 can be compatible with the first charging device 100a provided with the second temperature adjustment module 140, and the second charging device 100b without the second temperature adjustment module 140. Thus, no matter which charging device the first battery module 200a is connected to, it can work with it, expanding the application scenarios of the first battery module 200a. In a special scenario, for example, when a user already has some old second charging devices 100b and purchases a new first battery module 200a, he can either continue to purchase a new first charging device 100a to work with it, or match the existing second charging device 100b to work, avoiding the situation that the old second charging device 100b cannot be used and is idle, reducing the user's use cost.

[0243] In this embodiment, there are two matching modes, the first is that the first charging device 100a is connected to the first battery module 200a, and the second is that the second charging device 100b is connected to the first battery module 200a.

[0244] The case when the first charging device 100a is connected to the first battery module 200a has been described before, and reference can be made to the foregoing, which will not be repeated here.

[0245] When the second charging device 100b is connected to the first battery module 200a, as shown in FIGS. 8 and 10, the first battery module 200a includes a battery control module 260 and a first temperature adjustment module 270, and the second charging device 100b includes a charging device control module 160.

[0246] In this embodiment, only the first temperature adjustment module 270 is arranged in the first battery module 200a, and thus only the first temperature adjustment module 270 can be activated when the temperature of the first battery module 200a is low. Specifically, when the first battery module 200a is connected to the second charging device 100b, the battery control module 260 establishes communication with the charging device control module 160 to transmit communication information. The temperature detection module detects the temperature of the first battery module 200a, and the battery control module 260 determines whether the temperature of the first battery module 200a is not greater than the first heating temperature threshold value, and sends a request instruction to the charging device control module 160. Meanwhile, the battery control module 260 also sends communication information representing the temperature of the first battery module 200a, such as a specific temperature value or a control instruction representing the temperature value, to the charging device control module 160 for charging and heating control. Alternatively, when the battery control module 260 determines that the first battery module 200a is to be charged and heated simultaneously, the temperature control request and the charging request can be integrated into one request parameter value and sent to the charging device control module 160 as a request instruction.

[0247] Correspondingly, the charging device control module 160 receives the communication information and provides the power supply current to the first battery module 200a according to the request instruction. If the first battery module 200a only has a heating requirement, the battery control module 260 controls the closing of the switch elements Q3 and Q4 to provide the power supply current as the heating current to the first temperature adjustment module 270. If the first battery module 200a has both a heating requirement and a charging requirement, the battery control module 260 controls the closing of Q1, Q2, Q3 and Q4 to distribute the power supply current according to the actual requirement, a part of which is provided as the heating current to the first temperature adjustment module 270, and another part of which is provided as the charging current to charge the cell group 230. Since the second charging device 100b does not have the second temperature adjustment module 140, it only needs to provide the charging current and the heating current to the first battery module 200a. Thus, the charging control of the second charging device 100b on the first battery module 200a is realized, and the working of the first temperature adjustment module 270 is also realized, which improves the heating efficiency and shortens the heating and charging time to a certain extent.

[0248] In some embodiments, when the temperature of the first battery module 200a is not greater than the first heating temperature threshold value in the case of charging the first battery module 200a by the second charging device 100b, the second charging device 100b provides the charging current and the heating current to the first battery module 200a, and the first temperature adjustment module 270 starts heating, so that the average temperature rising rate of the first battery module 200a within the heating time T1 is not less than 0.5°C / min.

[0249] It can be understood that, since the second temperature adjusting module 140 is only arranged in the first battery module 200a, the average temperature rising rate of the first battery module 200a in the time T1 is slightly decreased. In the embodiment, the average temperature rising rate is not less than 0.5℃ / min. By independently setting the lower limit of the average temperature rising in the heating time T1, a better temperature rising result is achieved as much as possible, and the charging efficiency is improved.

[0250] Optionally, the average temperature rising rate of the first battery module 200a in the heating time T1 is 0.5-2℃ / min.

[0251] Optionally, the average temperature rising rate of the first battery module 200a in the heating time T1 is 0.6℃ / min.

[0252] Wherein, the determination of the charging rate, the setting of the first heating temperature threshold and the third heating temperature threshold, the content and form of the request instruction, etc. can refer to the foregoing description, and will not be described here. The schemes of the various modules, the connection relationship between the various modules, the communication setting and control scheme, the average temperature rising rate of the battery module, the power supply circuit design, the position setting and distribution of the first temperature adjusting module, the control logic, etc. are also applicable to the embodiment, and will not be described here.

[0253] In some embodiments, the first charging device 100a or the second charging device 100b can also include at least two battery pack mounting portions 120; then in the charging system 12, the first charging device 100a can be fully matched with the first battery module 200a to perform work, and can provide the first battery module 200a with the charging current and the heating current, and can also provide the second temperature adjusting module 140 with the heating current; the second charging device 100b can be fully matched with the second battery module 200b to perform work, and can provide the second battery module 200b with the charging current and the heating current.

[0254] The working process of the first charging device 100a matched with at least two battery modules 200 can refer to the foregoing description, and will not be described here.

[0255] The working procedure of the second charging device 100b when being connected with at least two first battery modules 200a is similar to the working procedure of the first charging device 100a when being connected with at least two battery modules 200. The difference is that, first, since the second battery device 100b does not have the second temperature adjusting module 140, the request instruction sent by the first battery module 200a usually does not include whether the charging device needs to start and / or stop the second temperature adjusting module 140. Of course, the first battery module 200a can still send this request instruction, but the second charging device 100b can ignore this instruction and does not respond. Second, the first charging device 100a receives the request instructions sent by each battery module 200, controls the charging and temperature control of each first battery module 200a according to the request instructions, but since the second temperature adjusting module 140 is not set, the control of the second temperature adjusting module 140 is not performed.

[0256] In the charging system 12, the first charging device 100a and the second charging device 100b are both connected with at least two battery pack mounting parts 120, and communicate with and control the power supply of each first battery module 200a, so as to realize efficient charging of the same type of battery module by different charging devices. In particular, when the first battery module 200a and the first charging device 100a start the temperature adjusting module of each other at the same time, the average temperature rising rate is higher, and thus the charging efficiency is higher, which effectively saves the waiting and use time of the user.

[0257] In some embodiments, the present application also provides a charging system 13, which comprises a first battery module 200a and a second battery module 200b, the first battery module 200a comprising a first temperature adjusting module 260 configured to adjust the temperature of the first battery module 200a; the charging system 13 further comprises a first charging device 100a and a second charging device 100b, the first charging device 100a comprising a first charging device shell, a first battery pack mounting part and a second temperature adjusting module 140, the first battery pack mounting part being arranged on the first charging device shell and being configured to detachably connect the first battery module 200a and / or the second battery module 200b, the second temperature adjusting module 140 being arranged on the first charging device shell and being configured to adjust the temperature of the first battery module 200a and / or the second battery module 200b; the second charging device 100b comprises a second charging device shell and a second battery pack mounting part, the second battery pack mounting part being arranged on the second charging device shell and being configured to detachably connect the first battery module 200a and / or the second battery module 200b; wherein the first charging device 100a and / or the second charging device 100b is configured to provide a charging current and a heating current to the first battery module 200a and provide a charging current to the second battery module 200b.

[0258] The descriptions of the first battery module 200a, the second battery module 200b, the first charging device 100a, and the second charging device 100b, and the working processes of the first charging device 100a compatible with the first battery module 200a and the second battery module 200b, and the working processes of the second charging device 100b compatible with the first battery module 200a and the second battery module 200b can refer to the foregoing descriptions, which will not be described herein.

[0259] In the charging system 13, whether the first charging device 100a provided with the second temperature adjustment module 140 or the second charging device 100b not provided with the second temperature adjustment module 140, can be compatible with the first battery module 200a provided with the first temperature adjustment module 270 and the second battery module 200b not provided with the first temperature adjustment module 270, greatly expanding the applicable scenarios of various types of battery modules and charging devices.

[0260] In some embodiments, the input interface of the first charging device 100a in the charging system 12 and the charging system 13 can be directly connected to an external AC power supply; in some embodiments, the input interface of the first charging device 100a is an adapter structure, which needs to be used in combination with the second charging device 100b directly connected to an external AC power supply. As shown in FIG. 18, specifically, one end of the adapter structure is connected to the housing of the first charging device 100a, and the other end is provided as an adapter seat and is detachably connected to the battery pack mounting portion 120 of the second charging device 100b. Wherein, the structure of the battery pack mounting portion of the first charging device 100a and the second charging device 100b is the same. Therefore, the second charging device 100b is connected to an external AC power supply, and the first charging device 100a is connected to the battery pack mounting portion 120 of the first charging device 100a through the adapter structure to obtain power supply power from the first charging device 100a for charging the battery module 200 connected to the first charging device 100a.

[0261] Optionally, the first charging device 100a and the second charging device 100b each include at least two battery pack mounting portions, and at least the first charging device 100a is the box structure described above. Specifically, the second charging device 100b can supply power to the devices connected to the at least two battery pack mounting portions according to at least one of the preset priorities, such as the order of the positions, the order of the inserted battery packs, the order of the SOCs, the order of the temperatures, etc.; when the battery pack mounting portion is connected to the battery module 200, the battery module 200 is charged, and when the battery pack mounting portion is connected to the first charging device 100a, the first charging device 100a is supplied with power.

[0262] It should be noted that, in order to improve compatibility, in some embodiments, when the first charging device 100a is connected to the battery pack mounting portion of the second charging device 100b, the first charging device 100a can communicate with the second charging device 100b in accordance with the communication protocol / logic of the battery module 200 and the second charging device 100b, and then the second charging device 100b can directly supply power to the first charging device 100a as a battery module 200. For example, the first charging device 100a generates a charging request instruction according to its own heating demand and charging demand for each battery module 200, and sends a request to the second charging device 100b in the manner of the battery module 200. Accordingly, the second charging device 100b provides power supply power to the second charging device 100b according to the request. This design expands the use scenarios of the second charging device 100b and improves the compatibility of the first charging device 100a and the second charging device 100b.

[0263] Specifically, the working process of matching the first charging device 100a and the second charging device 100b is as follows: when the user inserts the first charging device 100a into the battery module 200, connects the first charging device 100a to the battery pack mounting portion 120 of the second charging device 100b, and connects the second charging device 100b to the mains, a connection relationship is established. If the second charging device 100b includes multiple battery pack mounting portions, each battery pack mounting portion needs to be sequentially powered. Alternatively, if the first charging device 100a immediately obtains power supply, the charging device control module of the first charging device 100a can be activated. Alternatively, if the first charging device 100a may not be able to obtain power supply from the second charging device 100b temporarily, when the battery module 200 is inserted into the first charging device 100a, the first charging device 100a can be temporarily powered by the battery module 200, i.e., the charging device control module is activated and powered, and after obtaining power supply from the second charging device 100b, the power supply is switched to the second charging device 100b. Further, when the charging device control module of the first charging device obtains power supply, it establishes communication with each battery module 200 connected to the first charging device 100a and establishes communication with the second charging device 100b. The first charging device 100a obtains the charging and heating demands of itself and each battery module 200, generates a charging request instruction, and sends it to the second charging device 100b to obtain power supply from the second charging device 100b. After obtaining power supply, the first charging device 100a distributes the power supply power to the second temperature regulation module to start heating, to each battery module to start charging, and to the first temperature regulation module to start heating. In this way, the charging and heating work of the entire system is completed.

[0264] In some embodiments, when the charging system is in a cold environment, the user can connect the battery modules 200 into the first charging device 100a, heat and charge the battery modules 200, which can effectively improve the charging efficiency.

[0265] In some embodiments, in the above charging system, the second charging device 100b can be a storage type charging device, which includes a battery module as a storage power supply. That is, the second charging device 100b can obtain power from an external AC power supply to output charging power, or can output charging power from the storage power supply. When using a storage type charging device, since the output power of the storage power supply is large, the battery module 200 can be charged at a higher charging rate, thereby further improving the charging efficiency.

[0266] Optionally, a temperature adjusting module can also be provided in the storage type charging device to heat the storage power supply, so that the storage power supply can provide a higher output power in a low temperature environment to meet the user's demand for high charging efficiency. In this case, the cooperation system of the first charging device 100b as a storage type charging device and the first charging device 100b which is not a storage type charging device also has important practical value.

[0267] In some embodiments, as shown in FIGS. 5-6, the charging device 100 includes a housing 110, which includes a box body 112 and a cover body 114, the cover body 114 is pivotally connected to the box body 112 to open or close the box body 112, and the cover body 114 and the box body 112 form a closed space when closed; the housing 110 further includes an intermediate housing 117, which is arranged in the closed space; the charging device 100 further includes a battery pack mounting portion 120 arranged on the intermediate housing 117, which is configured to detachably mount the battery module; when the battery module 200 is mounted to the battery pack mounting portion 120, the battery module 200 is in the closed space.

[0268] The closed space is formed by the box body 112 and the cover body 114, so that when the battery module 200 is mounted to the battery pack mounting portion 120, it can be in the closed space, and when either the battery module 200 or the charging device 100 is heated, the heat can be effectively locked, avoiding the temperature of the battery module 200 from dropping, further ensuring the charging rate of the battery module and improving the charging efficiency.

[0269] In some embodiments, when the temperature of the battery module 200 is not greater than the third heating temperature threshold, the second temperature adjusting module 140 starts heating, so that the average temperature rising rate in the closed space is not less than 0.25℃ / min within the heating time T1.

[0270] The second temperature adjusting module 140 is arranged in the closed space, and the heat generated by the second temperature adjusting module 140 directly acts on each component in the closed space, thereby heating the battery module 200. By setting a lower limit for the average temperature rising rate of the temperature in the closed space within the heating time T1, the closed space can also achieve a better temperature rising result, and the charging efficiency is improved.

[0271] Optionally, the average temperature rising rate of the temperature in the closed space is not less than 0.25-2℃ / min.

[0272] Optionally, the average temperature rising rate of the temperature in the closed space is 0.5-1℃ / min.

[0273] In some embodiments, the shell 110 at least includes a first shell wall and a second shell wall, the first shell wall is an outer shell wall of the shell 100, and the second shell wall is an inner shell wall of the shell 100; the first shell wall and the second shell wall form a hollow structure space therebetween, wherein the hollow structure space is filled with vacuum or gas.

[0274] It can be understood that, in order to enhance the heat preservation performance, the shell 110 is provided with two shell walls, and the hollow structure space between the two shell walls is filled with vacuum or special gas, so as to further improve the heat preservation performance and ensure that the heat is locked in the closed space.

[0275] Further, in some embodiments, the thermal resistance value of the shell material is not less than 0.025(m2·K) / W.

[0276] In order to improve the heat preservation performance, the shell 110 can be made of PC (polycarbonate) + ABS (acrylonitrile-butadiene-styrene copolymer) material, or HDPE (high density polyethylene), or other materials with relatively high thermal resistance value. The first shell wall and the second shell wall can be made of the same material or different materials, but the material should have a thermal resistance value meeting the requirements. The greater the thermal resistance value of the material, the stronger the heat preservation performance.

[0277] In some embodiments, as shown in FIGS. 2-3, 5, 11, the battery module includes a battery pack 200 provided with an air inlet hole 210a and an air outlet hole 210b; the charging device includes: a housing 110; a battery pack mounting portion 120 provided on the housing 110, the battery pack mounting portion 120 being configured to detachably mount the battery pack 200; a first air vent 121 provided on the battery pack mounting portion 120, the first air vent 121 being in communication with the air outlet hole 210b of the battery pack 200 when the battery pack 200 is mounted to the battery pack mounting portion 120; and a second temperature adjusting module 140 configured to adjust the temperature of the battery pack 200, including: a temperature adjusting element 141 at least partially disposed in the housing 110 and configured to heat and / or cool air; and a suction fan 145 disposed in the housing 110 and in communication with the first air vent 121, the suction fan 145 being configured to drive air flow through the temperature adjusting element to flow into the air inlet hole 210a of the battery pack 200 and then to the air outlet hole 210b of the battery pack 200 when the battery pack 200 is mounted to the battery pack mounting portion 120.

[0278] By providing the charging device 100, the temperature adjusting element 141 is used to change the temperature of the ambient air, and the suction fan 145 is used to suck the air passing through the temperature adjusting element 141 into the battery pack 200 to cool or heat the battery pack 200, so that the battery cells 240 in the battery pack 200 can reach a suitable temperature to meet the use and charging requirements.

[0279] Therefore, whether the battery module 200 is provided with the first heating module or not, when it is connected to the charging device 100 provided with the second heating module, the charging device 100 can heat based on the communication with the battery module 200. The charging device control module 160 can adopt different control strategies based on different information transmitted by the battery control module 260 to match battery modules of different types, thereby improving the compatibility of the charging device 100. Here, "different" refers to one or more of the following: capacity of the battery cells, type of the battery cells, internal structure of the battery pack, and shape of the battery pack. In addition, the charging device control module 160 can also control the start and stop of the second heating module according to the ambient temperature, thereby improving the environmental adaptability of the charging system and improving the user experience.

[0280] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0281] The application also provides an electrical assembly 10 comprising the temperature control device 100 and the battery pack 200. The electrical assembly 10 mentioned herein includes but is not limited to the charging system mentioned above; the temperature control device 100 mentioned herein includes but is not limited to the charging device mentioned above, and the battery pack 200 mentioned herein includes but is not limited to the battery module mentioned above.

[0282] The structural design of the charging device and the battery pack mentioned above also applies to the temperature control device 100 and the battery pack 200 in the present embodiment, which will not be described herein.

[0283] Further, in some embodiments, as shown in FIG. 12, the temperature adjusting module 140 further comprises a control fan 143 arranged in the housing 110, which is configured to drive air flow through the temperature adjusting element 141. By arranging the control fan 143, the air temperature range changed by the temperature adjusting element 141 can be spread. Optionally, the control fan 143 is arranged adjacent to the temperature adjusting element 141. Specifically, the control fan 143 is arranged at one end of the temperature adjusting element 141.

[0284] In some embodiments, as shown in FIGS. 5, 11 and 12, the housing 110 encloses the adjacent first chamber 111 and the second chamber 113, and the housing 110 comprises an intermediate housing 117 between the first chamber 111 and the second chamber 113, and the battery pack mounting portion 120 is arranged on the intermediate housing 117, when the battery pack 200 is mounted on the battery pack mounting portion 120, the battery pack 200 is located in the first chamber 111, and the air suction fan 145 is located in the second chamber 113.

[0285] Optionally, the first chamber 111 is enclosed by the front wall 112a, the partial left wall 112c, the partial right wall 112d, the intermediate housing 117, the partial cover 114 and the partial bottom wall 112e. The housing 110 further comprises an intermediate wall (not shown) arranged between the intermediate housing 117 and the rear wall 112b in the front-rear direction and opposite to the intermediate housing 117, a top housing 118 and two side housings (not shown) between the intermediate housing 117 and the intermediate wall, and the second chamber 113 is enclosed by the intermediate housing 117, the intermediate wall, the top housing 118, the two side housings and the partial bottom wall 112e. Optionally, the top housing 118 is provided with a trigger 151 and a state display portion 153 for displaying the state of the battery pack 200, such as power information, fault information, etc. It should be noted that the first chamber 111 and the second chamber 113 can be fully enclosed or partially enclosed, for example, the first chamber 111 may, for example, have a certain gap between the intermediate housing 117 and the partial cover 114 in the up-down direction.

[0286] Optionally, the temperature adjusting element 141 can be located in the first chamber 111 or in the second chamber 113.

[0287] In some embodiments, as shown in FIG. 7, the intermediate shell 117 is further provided with a second air vent 127 communicating the first chamber 111 and the second chamber 113, and the control fan 143 is configured to be located in the second chamber 113 and communicate with the second air vent 127, and to drive the airflow to flow from the second chamber 113 to the first chamber 111 through the second air vent 127.

[0288] By setting the air suction fan 145, the airflow can flow from the first chamber 111 to the second chamber 113 through the first air vent 121, and by setting the control fan 143, the airflow can flow from the second chamber 113 to the first chamber 111 through the second air vent 127. The air suction fan 145 and the control fan 143 are configured to drive the airflow to circulate and flow in the first chamber 111 and the second chamber 113, so that the airflow continuously passes through the temperature adjusting element 141 and then flows through the battery pack 200, thereby reducing energy loss while adjusting the temperature of the battery pack 200, and having low cost and high temperature adjusting efficiency.

[0289] Optionally, the second air vent 127 is located adjacent to the battery pack mounting portion 120 and at the bottom of one side of the intermediate shell 117. Optionally, the second air vent 127 at least partially interfaces with the air outlet of the control fan 143.

[0290] Optionally, as shown in FIGS. 7 and 11, the control fan 143 and the second air vent 127 are oppositely arranged with respect to the temperature adjusting element 141. Such arrangement can enable the airflow with changed temperature to be efficiently transmitted into the first chamber 111 through the second air vent 127.

[0291] In some embodiments, as shown in FIGS. 12-14, the temperature adjusting module 140 further includes a heat conducting element 147, which has a heat transfer relationship with the temperature adjusting element 141. By setting the heat conducting element, heat can be better transmitted, and the heat conduction effect is better.

[0292] Optionally, the heat conducting element 147 is in a cylindrical shape, and the temperature adjusting element 141 is at least partially wrapped around the circumferential surface of the heat conducting element 147. As shown in FIG. 12, the heat conducting element 147 is mounted on the bottom wall 112e, and the control fan 143 is mounted on the heat conducting element 147. As shown in FIG. 14, the heat conducting element 147 is hollow inside to allow air flow. The temperature adjusting element 141 is attached to at least a portion of the circumferential surface of the heat conducting element 147 by an adhesive (not shown) such as double-sided tape. Optionally, the control fan 143 is arranged at one end of the heat conducting element 147, and the radial dimension of the control fan 143 is substantially the same as the radial dimension of the heat conducting element 147, so that the air flow generated by the control fan 143 can pass through the heat conducting element 147 to the maximum extent. In order to increase the heat conducting effect, the heat conducting element 147 further comprises a plurality of heat dissipation ribs 147a protruding inwardly from the inner wall of the heat conducting element 147. Optionally, the heat conducting element 147 is made of a heat conducting metal, such as aluminum or aluminum alloy.

[0293] In some embodiments, the internal air of the housing 110 is in operable communication or isolation with the external air. In some embodiments, when the cover 114 closes the box 112, the internal air of the housing 110 is isolated from the external air; when the cover 114 opens the box 112, the internal air of the housing 110 is in communication with the external air.

[0294] When the internal air of the housing 110 is isolated from the external air, the suction fan 145 and the control fan 143 are configured to drive the air flow to circulate in the first chamber 111 and the second chamber 113, and the temperature adjusting element 141 is located in the circulation path of the air flow. In this way, the air flow can only circulate in the housing, thereby avoiding energy loss caused by mixing of the heated or cooled air flow with the external air, and improving the thermal management efficiency.

[0295] In some embodiments, as shown in FIGS. 5 and 6, the housing 110 further comprises an air inlet 170 and an air outlet 175. The air inlet 170 is in communication with the first chamber 111, and the air outlet 175 is in communication with the second chamber 113. Optionally, the air inlet 170 and the air outlet 175 are located on opposite sides of the housing 110. Optionally, the air inlet 170 is located on the left wall 112c constituting the first chamber 111, and the air outlet 175 is located on the right wall 112d constituting the second chamber 113.

[0296] In some embodiments, the air inlet 170 and the air outlet 175 are operable to open or close to accommodate the cooling or heating needs of the battery pack 200. For example, when the battery pack 200 needs to be heated or cooled, the user can close the air inlet 170 and the air outlet 175 so that the interior of the housing 110 forms a sealed chamber, and the heated or cooled air flow after the temperature regulating element 141 can circulate in the first chamber 111 and the second chamber 113, and the outside air does not interfere with the cooling or heating of the battery pack, avoiding energy loss, and the thermal management can be fully and efficiently achieved.

[0297] In the embodiments shown, when the cover 114 closes the box 112 and the air inlet 170 and the air outlet 175 are closed, the interior air of the housing 110 is isolated from the outside air, and the interior of the housing 110 forms a sealed chamber, and the suction fan 145 and the control fan 143 are configured to drive the air flow to circulate in the first chamber 111 and the second chamber 113. When the cover 114 opens the box 112 or the air inlet 170 and the air outlet 175 are opened, the interior air of the housing 110 is in communication with the outside air. Taking the air flow passing through the battery pack 200 near the air outlet 175 as an example, the arrow direction shown in FIG. 12 illustrates the flow direction of the air flow in the first chamber 111 and the second chamber 113, and the arrow direction shown in FIG. 3 illustrates the flow direction of the air flow in the battery pack 200. The control fan 143 drives the air flow to pass through the temperature regulating element 141 to heat or cool the air temperature around the temperature regulating element 141. Since the second air vent 127 communicates the first chamber 111 and the second chamber 113, the heated or cooled air flow can pass from the second chamber 113 to the first chamber 111 through the second air vent 127, and then flow into the air inlet 203 of the battery pack 200, pass through the battery cells inside the battery pack 200, and then flow out from the air outlet 201 of the battery pack 200. Again, due to the action of the suction fan 145, and the air outlet 201 communicates the first air vent 121, the air flow flowing out of the battery pack 200 flows into the second chamber 113 through the first air vent 121, and thus the air flow realizes circulation between the first chamber 111 and the second chamber 113. In the embodiments shown in FIG. 12, the temperature regulating element 141 can include a heating element and / or a cooling element.

[0298] In some embodiments, as shown in FIG. 13, the temperature regulating element 141 is configured as a Peltier device. Taking the example of air flow passing through the battery pack 200 close to the air outlet 175 side, the arrow direction shown in FIG. 13 illustrates the air flow direction in the first chamber 111 and the second chamber 113, and the arrow direction shown in FIG. 3 illustrates the air flow direction in the battery pack 200. The air flow direction shown in FIG. 9 is substantially the same as the air flow direction shown in FIG. 12, and thus is not described again here. Unlike the single heating element or cooling element shown in FIG. 12, the Peltier device includes two temperature control surfaces (not shown), and the control module 160 can switch the current flow direction as needed, so that one of the two temperature control surfaces generates heat and the other generates cold, to achieve heating or cooling of the corresponding area. Alternatively, one of the temperature control surfaces of the Peltier device is located outside the housing 110, and the other is located inside the housing 110. When heating the battery pack is needed, the control module 160 is configured to cause the temperature control surface located inside the housing 110 to generate heat to heat the air temperature inside the housing 110, and the control module 160 controls the air suction fan 145 and the control fan 143 to start to drive the air flow to circulate in the first chamber 111 and the second chamber 113 to achieve heating of the battery pack. Moreover, due to the Peltier effect, when the temperature control surface located inside the housing 110 generates heat, the temperature control surface located outside the housing 110 generates cold. Alternatively, the heat conducting element 147 includes two, which are respectively attached to the two temperature control surfaces to guide the heated or cooled air out. Alternatively, the heat conducting element 147 can be configured as a heat conducting block having a plurality of heat conducting ribs with gaps therebetween for the air flow to pass through. Alternatively, the temperature regulating module 140 further includes a flow guiding fan 143a for driving the air flow to pass through the temperature control surface located outside the housing 110.

[0299] Alternatively, in the embodiments shown in FIG. 12 and FIG. 13, the control fan 143 can be configured as a blowing fan or a suction fan. The control fan 143 can also be positioned as needed, for example, it can be positioned at either end of the heat conducting element 147, or on the opposite side of the heat conducting element 147 relative to the Peltier device, which is not limited in the present application.

[0300] Alternatively, in the embodiments shown in FIG. 12 and FIG. 13, in order to avoid energy loss, the air inside the housing 110 is isolated from the air outside the housing 110 to achieve circulation of the air flow inside the housing 110. In the embodiments shown, the cover 114 closes the box 112 and the air inlet 170 and the air outlet 175 are closed to isolate the air inside the housing 110 from the air outside the housing 110.

[0301] It should be noted that when the temperature control device includes a plurality of battery pack mounting portions, in other words, a plurality of battery packs are arranged in the first chamber, the airflow can heat or cool all the battery packs in the first chamber, the difference is only that different battery pack mounting portions are correspondingly provided with different first air vents and different air suction fans. The arrow directions shown in FIGS. 12 and 13 only show the flow direction of the airflow for heating or cooling one of the battery packs, and do not represent the overall airflow circulation. In this way, the plurality of battery packs can share the heating or cooling air path, which is simple in structure and low in cost.

[0302] In some embodiments, the air inlet 170 and the air outlet 175 are basically the same in structure. Taking the air inlet 170 as an example, referring to FIGS. 16 to 19, the air inlet 170 includes an air window 171 mounted on the shell 110, and the air window 171 and the shell 110 can be fixedly mounted or detachably mounted. Optionally, as shown in FIG. 18, the air window 171 is provided with a plurality of first clamping members 171a on both sides thereof to clamp the air window 171 on the shell 110.

[0303] As shown in FIG. 19, the air inlet 170 further includes a plurality of first air ports 171b formed in the air window 171, and the plurality of first air ports 171b are arranged at intervals and form first connecting members 171c between adjacent first air ports 171a. Optionally, the first air ports 171b are arranged in a longitudinal manner on the air window 171.

[0304] Taking the air inlet 170 as an example, the air inlet 170 has an open state and a closed state. As shown in FIG. 16, when the air inlet 170 is in the open state, external air is allowed to enter the shell 110 from the first air ports 171b. As shown in FIG. 17, when the air inlet 170 is in the closed state, external air is prevented from entering the shell 110 from the first air ports 171b.

[0305] Specifically, the air inlet 170 further includes a plug 172 mounted on the air window 171. As shown in FIG. 18, the air window 171 is provided with a plurality of second clamping members 171d on both sides thereof to clamp the plug 172 on the air window 171. As shown in FIG. 19, the plug 172 is provided with a plurality of second air ports 172b arranged at intervals, and adjacent second air ports 172b form second connecting members 172c. Optionally, the second air ports 172b are arranged in a longitudinal manner on the plug 172.

[0306] When the air inlet 170 is in the open state, the second connecting members 172c are arranged in a staggered manner with the first air ports 171b, and the first air ports 171b are in communication with the second air ports 172b. When the air inlet 170 is in the closed state, the second connecting members 172c cover the first air ports 171b, and the first air ports 171a are not in communication with the second air ports 172b.

[0307] In some embodiments, the air inlet 170 further comprises a switching mechanism 173 configured to switch the air inlet 170 between the open state and the closed state in response to user operation.

[0308] In some embodiments, the switching mechanism 173 comprises an operating member 173a configured to move between an open position and a closed position in response to user operation. As shown in FIG. 16, when the operating member 173a is in the open position, the air inlet 170 is in the open state; as shown in FIG. 17, when the operating member 173a is in the closed position, the air inlet 170 is in the closed state.

[0309] Specifically, the air window 171 is provided with an opening 171e, and the operating member 173a at least partially protrudes from the opening 171e to facilitate user operation. Optionally, the operating member 173a is provided as a knob.

[0310] In some embodiments, the switching mechanism 173 further comprises a linkage member 173b linked with the operating member 173a and the insert 172, and the operating member 173a is capable of driving the linkage member 173b to move between a first position and a second position. When the operating member 173a is in the open position, the linkage member 173b is in the first position; when the operating member 173a is in the closed position, the linkage member 173b is in the second position.

[0311] In some embodiments, the switching mechanism 173 further comprises a sliding groove 172d provided on the insert 172, and the linkage member 173b is capable of sliding in the sliding groove 172d between the first position and the second position. Optionally, the sliding groove 172d is provided as an arc-shaped sliding groove, and the height of the sliding groove 172d from the distal end of the insert 172 when the linkage member 173b is in the first position is less than the height of the sliding groove 172d from the distal end of the insert 172 when the linkage member 173b is in the second position.

[0312] Optionally, the linkage member 173b is provided as a pin connected with the operating member 173a and the insert 172, respectively. The end of the linkage member 173b away from the operating member has a diameter greater than the diameter of the sliding groove 172d, so as to limit the axial movement of the linkage member 173b in the sliding groove 172d.

[0313] Optionally, in order to facilitate the installation of the operating member 173a and the linkage member 173b, the switching mechanism 173 further comprises a mounting member 173c, and the operating member 173a and the linkage member 173b are both arranged on the mounting member 173c. Specifically, the mounting member 173c is attached to the inner side of the opening 171c and exposes the operating member 173a outside the opening 171c. The mounting member 173c is provided with a mounting column 173e, and the linkage member 173b passes through the sliding groove 172d and is connected to the mounting column 173e. Optionally, in order to facilitate manufacturing, the operating member 173a is integrally injection molded with the mounting member 173c.

[0314] In some embodiments, the switching mechanism can further comprise a control unit (not shown) and a driving unit (not shown), so that the temperature control device can control the opening or closing of the air inlet and / or air outlet in an electronic control manner. For example, when the control unit detects that the air temperature outside the shell is higher than a certain threshold, it controls the driving unit to open the air inlet and / or air outlet. When the control unit detects that the air temperature outside the shell is lower than a certain threshold, it controls the driving unit to close the air inlet and / or air outlet. Optionally, the driving unit can comprise a motor and a linkage driven by the motor.

[0315] It should be noted that the switching device for switching the opening or closing of the air inlet and air outlet can be the same or different, and those skilled in the art can select the appropriate setting mode according to the actual situation.

[0316] When the air inlet 170 and the air outlet 175 are opened, the air suction fan 145 is configured to drive the airflow to be sucked from the outside of the shell 110 through the air inlet 170, cool the battery pack 200, and then flow out from the air outlet 175. When it is necessary to cool the battery pack 200, the user can open the air inlet 170 and the air outlet 175 to introduce air with a lower external temperature into the inside of the battery pack 200, thereby cooling the battery cells 240 inside the battery pack 200.

[0317] When the air inlet 170 and the air outlet 175 are opened, taking the battery pack 200 near the air outlet 175 as an example, the arrow direction shown in FIG. 11 illustrates the flow direction of the airflow entering the shell 110 from the air inlet 170 and flowing out of the shell 110 from the air outlet 175, and the arrow direction shown in FIG. 3 illustrates the flow direction of the airflow in the battery pack. Due to the action of the air suction fan 145, the airflow is sucked from the outside of the shell 110 through the air inlet 170 and flows into the first chamber 111, enters the air inlet hole 210a of the battery pack 200, cools the battery cells 240 in the battery pack 200, and then flows out from the air outlet hole 210b of the battery pack 200. Since the air outlet hole 210b of the battery pack 200 is in communication with the first ventilation hole 121, the airflow flows into the second chamber 113 through the first ventilation hole 121, and finally flows out from the air outlet 175. In the embodiment shown in FIG. 11, the cooling airflow does not pass through the temperature adjusting element 141, but only cools the battery pack by introducing air with a lower external temperature.

[0318] It should be noted that when the temperature control device includes multiple battery pack mounting portions, in other words, multiple battery packs are arranged in the first chamber, the air flow is all from the air inlet to the air outlet after cooling the battery pack, and the difference is only that different battery pack mounting portions are correspondingly provided with different first air vents and different air suction fans. The arrow direction shown in FIG. 11 only shows the flow direction of the air flow cooling one of the battery packs, and does not represent the overall air flow circulation. In this way, the multiple battery packs can share the air inlet, the air outlet and part of the cooling air path, which is simple in structure and low in cost.

[0319] In order to facilitate the gas exhaust, the air suction fan 145 is arranged towards the air outlet 175. As shown in FIG. 11, the air outlet 175 is arranged below the shell 100, and the air suction fan 145 is arranged above the air outlet 175. In order to enable the air flow discharged by the air suction fan 145 to flow to the air outlet, the air outlet of the air suction fan 145 is arranged towards the air outlet 1. Alternatively, the air suction fan 145 is arranged to be inclined relative to the shell 100.

[0320] As shown in FIGS. 11 and 12, the temperature adjustment module 140 further includes an air guide fan 148 arranged at the air outlet 175, and the air guide fan 148 is configured to guide the air flow discharged by the air suction fan 145 to outside the air outlet 175. By arranging the air guide fan, the air flow after cooling the battery pack can be discharged in time, so that the cooling effect is better.

[0321] As shown in FIGS. 20 and 21, the temperature adjustment module 140 further includes an air guide element 142, and the air guide element 142 is configured to guide the air flow from the first air vent 121 to the air suction fan 145. Alternatively, the air guide element 142 is mounted to the battery pack mounting portion 120.

[0322] Further, the air guide element 142 includes a first air guide opening 144 in communication with the first air vent 121, a second air guide opening 146 in communication with the air suction fan 145, and an air guide pipeline 149 connecting the first air guide opening 144 and the second air guide opening 146. Alternatively, the air suction fan 145 is mounted on the air guide element 142. Alternatively, the second air guide opening 146 is arranged in butt joint with the air suction fan 145, and the diameter of the air suction fan 145 is substantially the same as the diameter of the second air guide opening 142b.

[0323] In some embodiments, as shown in FIG. 5, the temperature control device 100 includes two first chambers 111, and the two first chambers 111 are symmetrically arranged about the second chamber 113.

[0324] As shown in FIG. 11, FIG. 12 and FIG. 20, the air suction fan 145 is located between the two oppositely arranged battery pack mounting portions 120 of the two first chambers 111, and drives air flow into the two battery packs 200 respectively when the two battery packs 200 are mounted in the two oppositely arranged battery pack mounting portions 120 respectively. Such arrangement can save space for the temperature control device, make the temperature control device simple and compact in structure, and also reduce the number of air suction fans, thereby reducing the cost.

[0325] As shown in FIG. 20, the air guide element 142 includes first air guide openings 142 respectively communicating with the first air vents 121 of the two first chambers 11, so as to guide air flow from the two first air vents 121 to the air suction fan 145 respectively.

[0326] When only one of the two oppositely arranged battery pack mounting portions is mounted with a battery pack, if the air flow is still divided into two paths to flow out from the two first air vents respectively, it will cause air flow waste and reduce the efficiency of temperature control. In order to avoid this problem, the first air vent 121 is configured to be operable to open or close. The first air vent 121 has an open state and a closed state, when the first air vent 121 is in the open state, air flow is allowed to enter the second chamber 113 from the first air vent 121; when the first air vent 121 is in the closed state, air flow is prevented from entering the second chamber 113 from the first air vent 121.

[0327] Optionally, the first air vent 121 is linked with the battery pack 200 to realize opening or closing. When the battery pack mounting portion 120 is mounted with the battery pack 200, the first air vent 121 is in the open state; when the battery pack mounting portion 120 is not mounted with the battery pack 200, the first air vent 121 is in the closed state. Such arrangement can make the air flow flow to the battery pack, instead of flowing to the path where the battery pack is not mounted, thereby avoiding the temperature regulation efficiency to be low.

[0328] In some embodiments, as shown in FIG. 20 and FIG. 21, the temperature regulation module 140 further includes an on-off mechanism 190 configured to switch the first air vent 121 between the open state and the closed state in response to the mounting action of the battery pack 200.

[0329] The on-off mechanism 190 includes a stop piece 191 configured to move between a wind-stopping position and a wind-letting-in position, when the stop piece 191 is in the wind-letting-in position, the first air vent 121 is in the open state; when the stop piece 191 is in the wind-stopping position, the first air vent 121 is in the closed state.

[0330] Optionally, the on-off mechanism 190 further includes a stop groove 126 provided on the battery pack mounting portion 120, and the stop piece 191 moves between the wind-stopping position and the wind-letting-in position in the stop groove 126.

[0331] The stopper 191 is provided with a locking buckle 193 protruding towards one side of the first air vent 121. The stopper 191 is provided with a plurality of air holes 195 arranged at intervals, and a connecting piece 197 is formed between adjacent air holes 195. Optionally, two locking buckles 193 are arranged on both sides of the stopper 191, and the air holes 195 are arranged between the two locking buckles 193.

[0332] When the battery pack 200 is installed on the battery pack mounting portion 120, the stopper 191 is in the air inlet position, the locking buckle 193 is pressed by the battery pack 200 and is separated from the stopper groove 126, and the stopper 191 moves away from the battery pack mounting portion 120, so that a gap (not shown) is formed between the stopper 191 and the first air vent 121, and air flow can flow from the first air vent 121 into the gap. When the battery pack 200 is not installed on the battery pack mounting portion 120, the locking buckle 193 passes through the stopper groove 126, and the connecting piece 197 covers the first air vent 121, so that air flow cannot flow from the first air vent 121 into the second chamber 113.

[0333] The on-off mechanism 190 further comprises an assembly portion 192 for mounting the stopper 191. Specifically, the assembly portion 192 comprises a receiving groove 196, and the side of the stopper 191 facing the assembly portion 192 is provided with a protrusion 198, which cooperates with the receiving groove 196 to position the stopper 191. The assembly portion 192 is located between the air guide element 142 and the stopper 191, and is mounted to the air guide element 192. The assembly portion 192 comprises an air vent 194 in communication with the first air guide vent 144 and the air holes 195, to allow air flow from the air holes 195 to the first air guide vent 144.

[0334] As shown in FIGS. 11 and 12, the temperature control device 100 further comprises a control module 160 arranged in the housing 110 and configured to control the temperature adjustment module 140 according to the temperature inside the housing 110 and / or the temperature of the air outside the housing 110. The “temperature inside the housing 110” can be the temperature in the first chamber 111 or the second chamber 113, or the temperature of the battery cell inside the battery pack 200 received in the housing 110. The control module 160 is configured to control the operation of the temperature adjustment module 140, such as the switching and rotation speed of the air suction fan 145 and the fan 143, whether the temperature adjustment element is running, etc., to adjust the internal air temperature of the temperature control device 100.

[0335] The temperature control device 100 further comprises one or more temperature sensors (not shown) configured to detect the temperature within the temperature control device 100, and / or the temperature of the one or more battery packs 200, and / or the temperature of the one or more device tabs 120c, etc. The temperature within the temperature control device 100 can be the temperature within the first chamber 111 or the temperature within the second chamber 113. The one or more temperature sensors provide control signals to the control module 160. Based on the control signals, the control module 160 determines the ambient air temperature within the temperature control device 100, and / or the temperature of the one or more battery packs 200, and / or the temperature of the one or more device tabs 120c, etc.

[0336] The temperature control device 100 further comprises a charging module 180 disposed within the housing 110, which is configured to connect to an external power source to supply charging power to the battery pack 200 when the battery pack 200 is mounted to the battery pack mounting portion 120. This arrangement enables the temperature control device to not only regulate the battery pack temperature, but also charge the battery pack, and both temperature control and operation can be completed in one temperature control device, which is more convenient to use. The external power source can be alternating current or direct current. Optionally, as shown in FIG. 22, the temperature control device 100 is connected to a charger 300, which is configured to connect to alternating current and convert the alternating current to direct current. The temperature control device 100 can receive the direct current power conducted from the charger 300 to charge the battery pack.

[0337] The present application also provides a temperature control device, comprising: a housing enclosing a first chamber and a second chamber adjacent and in communication, the housing comprising an intermediate housing between the first chamber and the second chamber; a plurality of battery pack mounting portions disposed on the intermediate housing, each battery pack mounting portion being configured to detachably mount one battery pack, when the battery pack is mounted to the battery pack mounting portion, the battery pack is located in the first chamber; a first vent opening disposed on the battery pack mounting portion, when the battery pack is mounted to the battery pack mounting portion, the first vent opening is in communication with the air outlet of the battery pack and in communication with the first chamber and the second chamber; an air inlet and an air outlet disposed on the housing, the air inlet being in communication with the first chamber, and the air outlet being in communication with the second chamber; and a suction fan disposed in the second chamber and in communication with the first vent opening, when the battery pack is mounted on the battery pack mounting portion, the suction fan is configured to drive airflow from the air inlet into the first chamber, cool the battery pack located in the first chamber, and then flow from the first chamber into the second chamber, and then flow out of the second chamber from the air outlet.

[0338] By providing a plurality of battery pack mounting portions in the first chamber of the temperature control device, the plurality of battery packs are located in the first chamber, and the cooling of the plurality of battery packs can share the air inlet, the air outlet, and part of the cooling air path, which is simple in structure and low in cost.

[0339] Specifically, the specific structure of the temperature control device and the connection relationship with the battery pack can be referred to Figs. 1 to 22 and the corresponding expressions described above, which will not be repeated here.

[0340] The application also provides a temperature control device, comprising: a shell, which encloses a first chamber and a second chamber adjacent to each other, and comprises an intermediate shell between the first chamber and the second chamber; a battery pack mounting portion provided on the intermediate shell, configured to detachably mount a battery pack, and when the battery pack is mounted on the battery pack mounting portion, the battery pack is located in the first chamber; a first ventilation opening provided on the battery pack mounting portion, configured to communicate with an air outlet hole of the battery pack and the first chamber and the second chamber when the battery pack is mounted on the battery pack mounting portion; a second ventilation opening provided on the intermediate shell, communicating the first chamber and the second chamber; a temperature adjustment module comprising a temperature adjustment element provided in the second chamber, configured to heat and / or cool air, and the temperature adjustment module is configured to drive air flow from one of the first ventilation opening and the second ventilation opening to flow from the first chamber to the second chamber, and from the other of the first ventilation opening and the second ventilation opening to flow from the second chamber to the first chamber, to realize circulation between the first chamber and the second chamber, and the temperature adjustment element is located in the circulation path of the air flow.

[0341] The air flow circulates between the first chamber and the second chamber, and the temperature adjustment element is arranged in the circulation path of the air flow, so that the air flow continuously passes through the temperature adjustment element and then flows through the battery pack, which reduces energy loss while adjusting the temperature of the battery pack, has low cost and high temperature adjustment efficiency.

[0342] Specifically, the specific structure of the temperature control device and the connection relationship with the battery pack can be referred to Figs. 1 to 22 and the corresponding expressions described above, which will not be repeated here.

[0343] The application provides a specific embodiment of a charging system. As shown in FIG. 18, the charging system 10 includes a charging device 100 and a battery module 200, wherein the charging device 100 includes a first charging device 100a and a second charging device 100b, and the battery module 200 includes a first battery module 200a and a second battery module 200b. The first battery module 200a is provided with a first temperature adjusting module 270, a battery control module 260, and a temperature detection module, and the first temperature adjusting module 270 is arranged in the battery cell group at intervals; the second battery module 200a is provided with a battery control module 260 and a temperature detection module. The first charging device 100a includes four battery pack mounting parts, and is further provided with a second temperature adjusting module 140 and a charging device control module 160; the second charging device 100b includes two battery pack mounting parts and is provided with a charging device control module 160. The first battery module 200a and the second battery module 200b are matched with the first charging device 100a and the second charging device 100b.

[0344] For the specific settings of the first battery module 200a, the second battery module 200b, the first charging device 100a, and the second charging device 100b, and the specific settings of the first temperature adjusting module 270 and the second temperature adjusting module 140, please refer to the foregoing description, which will not be repeated here.

[0345] Specifically, the second charging device 100b is connected to an external AC power source through an AC plug, and the first charging device 100a is detachably connected to the battery pack mounting part of the second charging device 100b through an adapter structure to obtain power supply from the second charging device 100b. The first battery module 200a and the second battery module 200b can be arbitrarily plugged into the battery pack mounting part of the first charging device 100a or the second charging device 100b for charging.

[0346] In this embodiment, taking the battery module 200 with lithium iron phosphate material as an example, a structure of 60V, 15 battery cells, and 17Ah is selected. The relationship between the temperature and the charging rate is set as follows: charging is prohibited below 0℃, the charging rate is 1C at 0-7℃, the charging rate is 2C at 7-15℃, the charging rate is 6C at 15-65℃, the over-temperature protection temperature threshold is reached at 70℃, and charging is prohibited. Correspondingly, the first heating temperature threshold is 0℃, the second heating temperature threshold is 15℃, the allowed charging temperature threshold is 0℃, the first charging temperature threshold is 7℃, and the second charging temperature threshold is 15℃, or it can be understood as 15-65℃, and the temperature difference between the first heating temperature threshold and the over-temperature protection temperature threshold is 5℃. In this embodiment, the charging device 100 selects a 30A charging device, the second temperature adjusting module 140 starts and / or stops heating according to the instruction of the battery module, and also stops heating according to the ambient temperature in the sealed space of the first charging device 100a.

[0347] When the whole charging system is working, when the battery module 200 (the first battery module 200a, the second battery module 200b) accesses any charging device to establish communication, the battery control module 260 determines the charging rate of the battery module 200 according to the temperature of the battery module 200, and the charging device charges the battery module 200 according to the charging rate, wherein the charging rate of the battery module 200 changes with the change of the temperature of the battery module 200. Alternatively, the charging rate of the battery module 200 is the maximum charging rate at the current temperature. For the relationship between the temperature of the battery module 200 and the charging rate, please refer to the foregoing description, which will not be repeated here.

[0348] When the temperature of the battery module 200 is less than 0℃, the battery module 200 determines that the first temperature adjusting module 270 needs to be started, but the charging is prohibited, and the battery module 200 is set to be preferentially provided with the heating current by the charging device 100, at this time the battery module 200 sends the request instruction representing the heating request to the charging device 100, and the charging device 200 provides the current to the battery module 200 for heating, while the charging device 200 controls the second temperature adjusting module to start heating. When the temperature of the battery module 200 is 0℃-15℃, the battery module 200 determines that the first temperature adjusting module 270 needs to be started, and the charging is allowed, at this time the battery module 200 sends the request instruction representing the heating request and the charging request to the charging device 100, and the charging device 200 provides the current to the battery module 200 for charging and heating, while the charging device 200 controls the second temperature adjusting module to start heating. When the temperature of the battery module 200 is 15-65℃, the battery module 200 determines that the first temperature adjusting module 270 does not need to be started, and the charging is allowed, at this time the battery module 200 sends the request instruction representing the charging request to the charging device 100, and the charging device 200 provides the current to the battery module 200 for charging, and controls the second temperature adjusting module not to start heating.

[0349] In this embodiment, the first temperature adjustment module 270 selects a 50W heating film, and the second temperature adjustment module selects two 150W heating films. The ratio of the power of the first temperature adjustment module 270 to the number of battery cells is about 13W / cell, which meets the range of 3W / cell-30W / cell. The temperature rise of the battery module from self-starting heating to starting charging is 10°C, which can be achieved in about 14 minutes, and the average temperature rise rate of the battery module 200 within the heating time T1 is about 0.7°C / min. That is, the heating time T1 required from starting heating to starting charging is less than 20 minutes, and the average temperature rise rate of the battery module 200 within the heating time T1 is between 0.5-2°C / min. It can be understood that when a heating film with greater power is selected, the heating time is shorter, and the average temperature rise rate of the battery module within the heating time is also faster. Based on the above data, the product of the real-time charging rate of the battery module is in the range of 11.9°C*Ah / min-71.4°C*Ah / min, which is within the parameter range of 2°C*Ah / min-700°C*Ah / min.

[0350] After the battery module 200 starts charging, the charging time T2 from starting charging to charging to 80% of the rated capacity is about 30 minutes, which is not greater than 40 minutes, of which about 10 minutes is before reaching 2C, and the time for charging at a charging rate of 2C or above is about 20 minutes, meeting the time requirement that the charging rate is not less than 2C for not less than 8 minutes. Among them, the value of T1 / T2 is 0.46, which is within the interval of 0.1-2.5. In particular, when using a storage type charging device, the output charging current can reach more than 60A, so the charging time T2 of the battery module 200 from starting charging to charging to 80% of the rated capacity can be reduced to within 20 minutes, meeting the time requirement of 25 minutes.

[0351] When the first charging device 100a receives the request instruction of the battery module, the power demand of the second temperature adjustment module 140 is integrated into the total request instruction and power is requested from the second charging device 100b, and the second charging device 100b can supply power to the first charging device 100a according to the preset priority, and the first charging device 100a can correspondingly provide power supply power according to the request. For specific communication and control logic, please refer to the foregoing description, which will not be repeated here.

[0352] Therefore, the first charging device 100a, the second charging device 100b, the first battery module 200a, and the second battery module 200b are mutually compatible and collectively form a charging system with temperature adjustment, which not only solves the charging dilemma of the charging system in a low-temperature environment, but also realizes efficient and safe charging, expands the use scenarios of the charging system, and provides powerful equipment support for the promotion of energy type electric tools and energy systems.

[0353] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0354] The above-described embodiments only express several implementation manners of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the application should be subject to the appended claims.

Claims

1. A charging system comprising: A battery module, comprising a battery cell group, the battery cell group comprising at least one battery cell; A charging device configured to charge the battery module; A temperature adjusting module arranged in the battery module and / or the charging device, and configured to adjust the temperature of the battery module; A temperature detecting module configured to detect the temperature of the battery module; and a control module configured to control the operation of the temperature adjusting module according to the temperature of the battery module; wherein when the temperature of the battery module is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; and when the temperature of the battery module is not less than an allowed charging temperature threshold, the charging device starts charging the battery module; and wherein the ratio of the heating time T1 required for the battery module from starting heating to starting charging to the charging time T2 required for the battery module from starting charging to reaching 80% of the rated capacity is between 0.1 and 2.

5.

2. A charging system comprising: A battery module, comprising a battery cell group, the battery cell group comprising at least one battery cell; and a charging device configured to charge the battery module; A temperature adjusting module arranged in the battery module and / or the charging device, and configured to adjust the temperature of the battery module; A temperature detecting module configured to detect the temperature of the battery module; and a control module configured to control the operation of the temperature adjusting module according to the temperature of the battery module; wherein when the temperature of the battery module is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; and when the temperature of the battery module is not less than an allowed charging temperature threshold, the charging device starts charging the battery module; and wherein the control module is further configured to determine the charging rate of the battery module according to the temperature of the battery module; the charging device charges the battery module at the charging rate; and wherein the charging rate changes with the temperature of the battery module, and the charging rate is the maximum allowed charging rate of the battery module at the current temperature.

3. A charging system comprising: A battery module, comprising a battery cell group, the battery cell group comprising at least one battery cell; A charging device configured to charge the battery module; A temperature adjusting module arranged in the battery module and / or the charging device, and configured to adjust the temperature of the battery module; A temperature detecting module configured to detect the temperature of the battery module; and a control module configured to control the operation of the temperature adjusting module according to the temperature of the battery module; wherein when the temperature of the battery module is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; and when the temperature of the battery module is not less than an allowed charging temperature threshold, the charging device starts charging the battery module; and wherein the control module is further configured to determine the charging rate of the battery module according to the temperature of the battery module; the charging rate changes with the temperature of the battery module, and the charging rate is the maximum allowed charging rate of the battery module at the current temperature. When the temperature of the battery module is not less than a second charging temperature threshold, the control module determines a charging rate of the battery module as a first charging rate, the first charging rate being not less than 2C; wherein, during a charging process from starting charging of the battery module by the charging device to charging of the battery module to 80% of a rated capacity of the battery module, a time of charging rate not less than 2C is not less than 8 minutes; The second charging temperature threshold is greater than the allowable charging temperature threshold.

4. A charging system comprising: A battery module, comprising a cell group, the cell group comprising at least one cell; A charging device configured to charge the battery module; A temperature adjusting module provided in the battery module and / or the charging device, and configured to adjust the temperature of the battery module; A temperature detecting module configured to detect the temperature of the battery module; a control module configured to control operation of the temperature detecting module according to the temperature of the battery module; when the temperature of the battery module is not greater than a first heating temperature threshold, the control module controls the temperature adjusting module to start heating; when the temperature of the battery module is not less than an allowable charging temperature threshold, the charging device starts charging of the battery module; the control module is further configured to determine a charging rate of the battery module according to the temperature of the battery module, and the charging device charges the battery module at the charging rate; wherein, a product of an average temperature rising rate of the battery module within a heating time T1 required from starting heating to starting charging and a real-time charging rate of the battery module ranges from 2 ℃*Ah / minute to 700 ℃*Ah / minute.

5. A charging system comprising: A battery module, comprising a first battery module and a second battery module, the first battery module comprising: a first temperature adjusting module configured to adjust the temperature of the first battery module; a charging device comprising a first charging device, the first charging device comprising: a housing; a battery pack mounting portion provided on the housing and configured to detachably connect the first battery module and / or the second battery module; a second temperature adjusting module at least partially provided in the housing and configured to adjust the temperature of the battery module connected to the first charging device; wherein the first charging device is configured to provide a charging current and a heating current to the first battery module, and to provide a charging current to the second battery module.

6. A charging system comprising: A battery module, including a first battery module, the first battery module comprising: a first temperature adjustment module configured to adjust a temperature of the first battery module; a charging device including a first charging device and a second charging device; the first charging device comprising: a first charging device housing; a first battery pack mounting portion provided on the first charging device housing and configured to detachably connect the first battery module; a second temperature adjustment module at least partially provided in the first charging device housing and configured to adjust the temperature of the first battery module; the second charging device comprising: a second charging device housing; a second battery pack mounting portion provided on the second charging device housing and configured to detachably connect the first battery module; wherein the first charging device is configured to provide a charging current and a heating current to the first battery module; and the second charging device is configured to provide a charging current and a heating current to the first battery module.

7. A charging system comprising: A temperature control device, characterized in that, comprising: a housing; a battery pack mounting portion provided on the housing, the battery pack mounting portion being configured to detachably mount a battery pack; a first air vent provided on the battery pack mounting portion, the first air vent being in communication with an air outlet hole of the battery pack when the battery pack is mounted on the battery pack mounting portion; and a temperature control device configured to adjust a temperature of a cell in the battery pack, the temperature control device comprising: a temperature control element at least partially provided in the housing and configured to heat and / or cool air; and a suction fan provided in the housing and in communication with the first air vent, the suction fan being configured to drive an air flow passing through the temperature control element to flow into an air inlet hole of the battery pack and then to the air outlet hole of the battery pack when the battery pack is mounted on the battery pack mounting portion.

8. A charging system comprising a temperature control device and a battery pack, the battery pack comprising: A battery pack housing; A cell group comprising a plurality of cells electrically connected to each other and accommodated in the battery pack housing; An air inlet hole and an air outlet hole provided on the battery pack housing; A temperature control device, comprising: a housing; a battery pack mounting portion provided on the housing, the battery pack mounting portion being configured to detachably mount a battery pack; a first air vent provided on the battery pack mounting portion, the first air vent being in communication with an air outlet hole when the battery pack is mounted on the battery pack mounting portion; and a temperature control device configured to adjust a temperature of a cell, the temperature control device comprising: a temperature control element at least partially provided in the housing and configured to heat and / or cool air; and a suction fan provided in the housing and in communication with the first air vent, the suction fan being configured to drive an air flow passing through the temperature control element to flow into an air inlet hole and then to the air outlet hole when the battery pack is mounted on the battery pack mounting portion.

9. A charging system comprising a temperature control device, characterized in that Comprising: a housing enclosing a first chamber and a second chamber adjacent to each other, the housing comprising an intermediate housing between the first chamber and the second chamber; A plurality of battery pack mounting portions are arranged on the intermediate housing, each of the battery pack mounting portions is configured to detachably mount one battery pack, when the battery pack is mounted on the battery pack mounting portion, the battery pack is located in the first chamber; a first ventilation opening is arranged on the battery pack mounting portion, when the battery pack is mounted on the battery pack mounting portion, the first ventilation opening is communicated with the air outlet hole of the battery pack and communicated with the first chamber and the second chamber; an air inlet and an air outlet are arranged on the housing, the air inlet is communicated with the first chamber, and the air outlet is communicated with the second chamber; a suction fan is arranged in the second chamber and communicated with the first ventilation opening, when the battery pack is mounted on the battery pack mounting portion, the suction fan is configured to drive the airflow to flow from the air inlet into the first chamber, cool the battery pack located in the first chamber, and then flow from the first chamber into the second chamber through the first ventilation opening, and then flow out of the second chamber from the air outlet.

10. A charging system comprising a temperature control device, characterized in that Comprise: a housing, which encloses adjacent first and second chambers, and includes an intermediate housing between the first and second chambers; a battery pack mounting portion arranged on the intermediate housing, the battery pack mounting portion is configured to detachably mount a battery pack, when the battery pack is mounted on the battery pack mounting portion, the battery pack is located in the first chamber; a first ventilation opening is arranged on the battery pack mounting portion, when the battery pack is mounted on the battery pack mounting portion, the first ventilation opening is communicated with the air outlet hole of the battery pack and communicated with the first chamber and the second chamber; a second ventilation opening is arranged on the intermediate housing, which is communicated with the first and second chambers; a temperature control device comprising a temperature control element arranged in the second chamber, the temperature control element is configured to heat and / or cool air, the temperature control device is configured to drive the airflow to flow from one of the first and second ventilation openings from the first chamber into the second chamber, and from the other of the first and second ventilation openings from the second chamber into the first chamber, to achieve circulation between the first and second chambers, and the temperature control element is located in the flow path of the airflow.

11. The charging system of claims 1-10, wherein, The control module is further configured to determine a charging rate of the battery module according to the temperature of the battery module, and the charging device charges the battery module at the charging rate; wherein the charging rate changes with the change of the temperature of the battery module.

12. The charging system of claims 1-11, wherein, When the temperature of the battery module is not less than a second charging temperature threshold, the control module is configured to determine the charging rate of the battery module as a first charging rate, and the first charging rate is not less than 2C; wherein during the charging process from starting charging the battery module to charging the battery module to 80% of its rated capacity, the time when the charging rate is not less than 2C is not less than 8 minutes.

13. The charging system of claims 1-12, wherein, The charging device comprises a storage type charging device, the storage type charging device comprises a storage power supply, the output power of the storage power supply is not less than 2000W, and the power of the battery module is not less than 1000Wh; when the battery module is charged using the storage type charging device, the charging time T2 required for the battery module to start charging to 80% of the rated capacity is not longer than 25 minutes.

14. The charging system of claims 1-13, wherein, The charging rate is a maximum allowed charging rate of the battery module at a current temperature.

15. The charging system of claims 1-14, wherein, When the temperature of the battery module is not greater than a first charging temperature threshold, the charging rate increases with an increase of the temperature of the battery module; when the temperature of the battery module is greater than the first charging temperature threshold, the charging rate decreases with an increase of the temperature of the battery module.

16. The charging system of claims 1-15, wherein, The first charging temperature threshold is less than an over-temperature protection temperature threshold of the battery module; wherein a temperature difference between the first temperature threshold and the over-temperature protection temperature threshold is not less than 5℃.

17. The charging system of claims 1-16, wherein, When the temperature of the battery module is in a first temperature interval, the charging rate of the battery module is a first constant charging rate; when the temperature of the battery module is in a second temperature interval, the charging rate of the battery module is a second constant charging rate.

18. The charging system of claims 1-17, wherein, The control module is further configured to control the operation of the temperature adjusting module according to the temperature of the battery module, so that a heating time T1 required for the battery module to start heating to enable the battery module to start charging is not longer than 20 minutes.

19. The charging system of claims 1-18, wherein, The power of the temperature adjusting module and the number of battery cells of the battery module are set so that, within the heating time T1, an average temperature rising rate of the battery module is not greater than 5℃ / minute.

20. The charging system of claims 1-19, wherein, When the number of battery cells is greater than or equal to 3, the power of the temperature adjusting module is set so that, within the time T1, the average temperature rising rate of the battery module is not greater than 2℃ / minute.

21. The charging system of claims 1-20, wherein, A ratio of the power of the temperature adjusting module to the number of battery cells ranges from 3W / cell to 30W / cell.

22. The charging system of claims 1-21, wherein, The control module is configured to, when a temperature difference between any two places of the battery module is greater than a preset temperature difference threshold, reduce a supply voltage of the temperature adjusting module and / or disconnect the supply of the temperature adjusting module.

23. The charging system of claims 1-22, wherein, The temperature adjusting module includes at least two temperature adjusting elements connected in series or in parallel; when a temperature difference between any two places of the battery module is greater than a preset temperature difference threshold, the control module is configured to, in the case of the at least two temperature adjusting elements connected in series, control to reduce the supply voltage of all the temperature adjusting elements and / or disconnect the supply of all the temperature adjusting elements. In the case of the at least two temperature adjusting elements connected in parallel, control to reduce the supply voltage of at least one of the temperature adjusting elements and / or disconnect the supply of at least one of the temperature adjusting elements.

24. The charging system of claims 1-23, wherein, The temperature adjusting module includes a first temperature adjusting module arranged in the battery module; the temperature adjusting module includes at least a first temperature adjusting element and a second temperature adjusting element, and the first temperature adjusting element and the second temperature adjusting element are arranged at intervals between the battery cells. The first temperature adjusting element is arranged in a first battery cell region, and the second temperature adjusting element is arranged in a second battery cell region closer to the center of the battery cell group than the first battery cell region; wherein a heating power value of the first temperature adjusting element is not less than a heating power value of the second temperature adjusting element.

25. The charging system of claims 1-24, wherein, The temperature adjusting module comprises a first temperature adjusting module arranged in the battery module; the first temperature adjusting module comprises at least a third temperature adjusting element and a fourth temperature adjusting element, the third temperature adjusting element and the fourth temperature adjusting element are arranged at intervals between the battery cells, the third temperature adjusting element and the fourth temperature adjusting element have the same heating power value; at least one third temperature adjusting element is arranged in a third battery cell area, and at least one fourth temperature adjusting element is arranged in a fourth battery cell area, the fourth battery cell area is closer to the center of the battery cell group than the third battery cell area; wherein the density of the third temperature adjusting element arranged in the third battery cell area is not less than the density of the fourth temperature adjusting element arranged in the fourth battery cell area.

26. The charging system of claims 1-25, wherein, The arrangement position of the temperature adjusting module comprises at least one of the following: wrapping the battery cell group along the outer surface of the battery cell group, arranging at intervals between the battery cells, arranging on one side of the battery cell group, or arranging on the end plate connected to the battery cell group.

27. The charging system of claims 1-26, wherein, The control module controls the temperature adjusting module to heat the battery module according to the temperature of the battery module; the control module determines the charging rate of the battery module according to the temperature of the battery module, and the charging device charges the battery module at the charging rate; wherein the product of the average temperature rising rate of the battery module within the heating time T1 and the real-time charging rate of the battery module ranges from 2 ℃*Ah / min to 700 ℃*Ah / min.

28. The charging system of claims 1-27, wherein, When the temperature of the battery module is not less than a second heating temperature threshold, the temperature adjusting module stops heating; when the temperature of the battery module is not less than a first charging temperature threshold, the control module determines the charging rate of the battery module as a second charging rate, and the second charging rate is the maximum charging rate that the battery module can reach during charging; wherein the second heating temperature threshold is not less than the allowable charging temperature threshold and not greater than the first charging temperature threshold.

29. The charging system of claims 1-28, wherein, The temperature adjustment module at least includes a first temperature adjustment module arranged in the battery module; the first temperature adjustment module is electrically connected with the charging device to form a first temperature adjustment power supply path, when the first temperature adjustment power supply path is turned on, the first temperature adjustment module is powered by the charging device; or, the first temperature adjustment module is electrically connected with at least one of the battery cells to form a second temperature adjustment power supply path, when the second temperature adjustment power supply path is turned on, the first temperature adjustment module is powered by the at least one battery cell; or, the first temperature adjustment module is electrically connected with the charging device to form the first temperature adjustment power supply path, and the first temperature adjustment module is also electrically connected with at least one of the battery cells to form the second temperature adjustment power supply path, and the control module is configured to selectively turn on at least one of the first temperature adjustment power supply path and the second temperature adjustment power supply path to select at least one of the charging device and the at least one battery cell to power the first temperature adjustment module.

30. The charging system of claims 1-29, wherein, The control module includes a battery control module arranged in the battery module and configured to detect whether the battery module obtains power from the charging device; if yes, control to turn on the first temperature adjustment power supply path to select the charging device to power the first temperature adjustment module; if no, obtain a battery module parameter of the battery module; when the battery module parameter meets a first preset condition, control to turn on the second temperature adjustment power supply path to select the at least one battery cell to power the first temperature adjustment module; when the battery module parameter does not meet the first preset condition, control to turn off the second temperature adjustment power supply path to disconnect the power supply to the first temperature adjustment module.

31. The charging system of claims 1-30, wherein, The first preset condition includes at least one of that the power of the battery module is not lower than a preset power threshold, the voltage of the battery module is not lower than a preset voltage value, the temperature of the battery module is not higher than a high temperature threshold, the battery module is not in a fault state, and the battery module allows the power supply to the first heating module.

32. The charging system of claims 1-31, wherein, The control module includes a battery control module arranged in the battery module; when the battery module is connected to the charging device, the battery control module is configured to generate a request instruction and send it to the charging device to request power supply power from the charging device; wherein the request instruction represents a temperature control request and / or a charging request.

33. The charging system of claims 1-32, wherein, The battery control module is further configured to detect the current of the battery module after sending the request instruction to the charging device, determine that the battery module successfully obtains the power supply from the charging device when the current of the battery module is greater than a first preset current value, and determine that the battery module does not obtain the power supply from the charging device when the current of the battery module is not greater than the first preset current value, wherein the power supply is used to power the first temperature adjustment module.

34. The charging system of any one of claims 1-33, wherein, The temperature adjustment module comprises a second temperature adjustment module arranged in the charging device, the control module comprises a battery control module arranged in the battery module and a charging device control module arranged in the charging device, the battery control module establishes communication with the charging device control module to transmit communication information when the battery module is connected to the charging device, and the charging device control module is further configured to provide charging power to the battery module and control the operation of the second temperature adjustment module according to the communication information.

35. The charging system of claims 1-34, wherein, The communication information at least comprises the temperature of the battery module, the charging device control module is configured to receive the temperature of the battery module, control the second temperature adjustment module to start heating when the temperature of the battery module is not greater than a third heating temperature threshold, and / or control the second temperature adjustment module to stop heating when the temperature of the battery module is greater than a fourth heating temperature threshold.

36. The charging system of claims 1-35, wherein, The communication information at least comprises a temperature control instruction, the battery control module is further configured to obtain the temperature of the battery module, generate the temperature control instruction according to the temperature of the battery module, and send the temperature control instruction to the charging device control module, the temperature control instruction represents that the battery module allows heating when the temperature of the battery module is not greater than the first heating temperature threshold, the charging device control module controls the second temperature adjustment module to start heating in response to the temperature control instruction, and the temperature control instruction represents that the battery module does not allow heating when the temperature of the battery module is greater than the second heating temperature threshold, the charging device control module controls the second temperature adjustment module to stop heating in response to the temperature control instruction.

37. The charging system of any one of claims 1-36, wherein, The communication information at least includes a charging control instruction; the battery control module is further configured to: acquire a parameter of the battery module, generate the charging control instruction according to the parameter of the battery module, and send to the charging device control module; when the parameter of the battery module is in an allowable parameter range, the charging control instruction represents that the battery module allows charging, and the charging device control module controls to provide charging power to the battery module in response to the charging control instruction; when the parameter of the battery module is not in the allowable parameter range, the control instruction represents that the battery module prohibits charging, and the charging device control module controls to stop providing charging power to the battery module in response to the charging control instruction.

38. The charging system of any one of claims 1-37, wherein: The temperature adjusting module includes a first temperature adjusting module and a second temperature adjusting module; the battery module includes a first battery module and a second battery module, the first battery module includes the first temperature adjusting module and is configured to adjust the temperature of the first battery module; the charging device includes a first charging device, the first charging device includes: a first charging device shell; a first battery pack mounting portion provided on the first charging device shell and configured to detachably connect the first battery module and / or the second battery module; and the second temperature adjusting module is at least partially arranged in the first charging device shell and is configured to adjust the temperature of the battery module connected to the first charging device; wherein the first charging device is configured to provide a charging current and a heating current to the first battery module and to provide a charging current to the second battery module.

39. The charging system of claims 1-38, wherein, The battery module includes a first battery module, the first battery module includes: a first temperature adjusting module configured to adjust the temperature of the first battery module; the charging device includes a first charging device and a second charging device; the first charging device includes: a first charging device shell; a first battery pack mounting portion provided on the first charging device shell and configured to detachably connect the first battery module; and a second temperature adjusting module at least partially arranged in the first charging device shell and configured to adjust the temperature of the first battery module; the second charging device includes: a charging device shell; a second battery pack mounting portion provided on the second charging device shell and configured to detachably connect the first battery module; wherein the first charging device is configured to provide a charging current and a heating current to the first battery module; and the second charging device is configured to provide a charging current and a heating current to the first battery module.

40. The charging system of claims 1-39, wherein, When the first charging device charges the first battery module, the first charging device provides the first battery module with a charging current and a heating current in response to a request instruction of the first battery module when a temperature of the first battery module is not greater than a first heating temperature threshold, and the first temperature regulation module starts heating; the first charging device receives communication information from the battery module, which represents the temperature of the first battery module; and the first charging device provides the second temperature regulation module with a heating current when the temperature of the first battery module is not greater than a third heating temperature threshold, and the second temperature regulation module starts heating.

41. The charging system of claims 1-40, wherein, When the first temperature regulation module and the second temperature regulation module heat at the same time, an average temperature rising rate of the first battery module within the heating time T1 is not less than 0.6℃ / min.

42. The charging system of claims 1-41, wherein, The heating current provided by the first charging device to the first temperature regulation module is not greater than the heating current provided to the second temperature regulation module.

43. The charging system of claims 1-42, wherein, When the first charging device charges the second battery module, the first charging device provides the second battery module with a charging current, and the first charging device provides the second temperature regulation module with a heating current when a temperature of the second battery module is not greater than a third heating temperature threshold, and the second temperature regulation module starts heating, so that an average temperature rising rate of the second battery module within the heating time T1 is not less than 0.25℃ / min.

44. The charging system of any one of claims 1-43, wherein, When the second charging device charges the first battery module, the second charging device provides the first battery module with a charging current and a heating current when a temperature of the first battery module is not greater than a first heating temperature threshold, and the first temperature regulation module starts heating, so that an average temperature rising rate of the first battery module within the heating time T1 is not less than 0.5℃ / min.

45. The charging system of claims 1-44, wherein, The charging device comprises a shell, the shell comprises a box body and a cover body, the cover body is pivotally connected to the box body to open or close the box body, and the box body and the cover body form a closed space when the box body is closed; the shell further comprises an intermediate shell, which is arranged in the closed space; the charging device further comprises a battery pack mounting portion arranged on the intermediate shell, the battery pack mounting portion is configured to detachably mount the battery module; when the battery module is mounted to the battery pack mounting portion, the battery pack is in the closed space.

46. The charging system of claims 1-45, wherein, When the temperature of the battery module is not greater than a third heating temperature threshold, the second temperature regulation module starts heating, so that an average temperature rising rate of the temperature in the closed space within the heating time T1 is not less than 0.25℃ / min.

47. The charging system of claims 1-46, wherein, The shell comprises at least a first shell wall and a second shell wall, the first shell wall is an outer wall of the shell, and the second shell wall is an inner wall of the shell; a hollow structure space is formed between the first shell wall and the second shell wall, and the hollow structure space is in a vacuum state or filled with gas.

48. The charging system of claims 1-47, wherein, The thermal resistance value of the shell material is not less than 0.025 (m 2 K) / W.

49. The charging system of claims 1-48, wherein, The battery module comprises a battery pack provided with an air inlet hole and an air outlet hole; the charging device comprises a shell, a battery pack mounting portion provided on the shell and configured to detachably mount the battery pack, a first ventilation opening provided on the battery pack mounting portion and communicating with the air outlet hole of the battery pack when the battery pack is mounted to the battery pack mounting portion, and a second temperature adjusting module configured to adjust the temperature of the battery pack and comprising a temperature adjusting element at least partially provided in the shell and configured to heat and / or cool air, and a suction fan provided in the shell and communicating with the first ventilation opening and configured to drive air flow to flow into the air inlet hole of the battery pack through the temperature adjusting element when the battery pack is mounted to the battery pack mounting portion, and then flow to the air outlet hole of the battery pack through the battery cells in the battery pack.

50. The charging system of claims 1-49, wherein, The temperature control device further comprises a control fan provided in the shell and configured to drive air flow to pass through the temperature control element.

51. The charging system of claims 1-50, wherein, The shell encloses a first chamber and a second chamber adjacent to each other, and comprises an intermediate shell between the first chamber and the second chamber, and the battery pack mounting portion is provided on the intermediate shell, and the battery pack is located in the first chamber and the suction fan is located in the second chamber when the battery pack is mounted to the battery pack mounting portion.

52. The charging system of any one of claims 1-51, wherein The intermediate shell is further provided with a second ventilation opening communicating with the first chamber and the second chamber, and the control fan is configured to be located in the second chamber and communicate with the second ventilation opening and drive air flow to flow from the second chamber to the first chamber through the second ventilation opening.

53. The charging system of claims 1-52, wherein, The control fan and the second ventilation opening are oppositely arranged with respect to the temperature control element.

54. The charging system of claims 1-53, wherein, The internal air of the shell is operatively communicated with or isolated from external air, and when the internal air of the shell is isolated from the external air, the suction fan and the control fan are configured to drive air flow to circulate and flow in the first chamber and the second chamber, and the temperature control element is located in the flow path of the air flow.

55. The charging system of claims 1-54, wherein, The shell is provided with an air inlet and an air outlet, the air inlet communicates with the first chamber, and the air outlet communicates with the second chamber.

56. The charging system of any one of claims 1-55, wherein The air inlet and the air outlet are operatively opened or closed.

57. The charging system of claims 1-56, wherein, When the air inlet and the air outlet are opened, the suction fan is configured to drive air flow to be sucked from the outside of the shell through the air inlet, and then flow out of the air outlet after cooling the battery pack.

58. The charging system of claims 1-57, wherein, The temperature control device includes two first chambers, which are symmetrically arranged with respect to the second chamber.

59. The charging system of claims 1-58, wherein, The air suction fan is located between the oppositely arranged battery pack mounting portions in the two first chambers, and when the two battery packs are respectively mounted to the oppositely arranged battery pack mounting portions, the air suction fan is configured to drive air flow to flow into the two battery packs, respectively.

60. The charging system of claims 1-59, wherein, The temperature control device further includes a charging module arranged in the shell, and when the battery pack is mounted to the battery pack mounting portion, the charging module is configured to connect an external power supply to supply charging power to the battery pack.

Images