Battery pack and battery pack parallel power supply device

Abstract

The utility model discloses a battery pack and a battery pack parallel power supply device. The battery pack comprises a control module, a first switch module, an output port and a first parallel operation port, and when the battery pack is in a working state and the first parallel operation port is connected with the power-up pack, the control module controls the first switch module to be in an off state. According to the technical scheme, the first switch module is arranged in the battery pack, the power output circuit and the parallel operation output circuit of the battery pack are separated, and when the battery pack is in the working state and needs to be in parallel operation with the power-up pack, the second switch module is controlled to be switched off, so that the battery pack can be in parallel operation with the power-up pack in the working state; the hot plug of the battery pack and the power-up pack is realized, a user can conveniently use the battery pack and the power-up pack to carry out power-up operation, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack and a battery pack parallel power supply device. Background Art

[0002] Outdoor power supply, also known as portable energy storage power supply, is a multifunctional energy storage device with built-in lithium-ion battery, which can store electrical energy and has AC output. Portable energy storage power supply is light in weight, high in capacity, high in power, easy to carry, and can be used indoors or outdoors. Conventional charging or solar charging can be selected according to different usage conditions. It can provide ultra-high-power AC interface and is equipped with various types of DC output interfaces such as USB-A interface, USB-C interface, car charger interface, etc. It can not only be used as a backup power supply for electric vehicles, but also suitable for various types of electronic products. It can be used as a small backup power supply for outdoor power supply and emergency situations such as power outages. The size of the battery pack capacity in the portable energy storage power supply determines the amount of power stored and the use time of the equipment. The outdoor power supplies on the market are currently limited by factors such as cost, volume, and convenience of carrying. The capacity is generally limited and can no longer meet the needs of long-term outdoor use.

[0003] In order to solve the above technical problems, Figure 1 As shown, the prior art uses a power pack and a battery pack in parallel to achieve capacity expansion. When paralleling, the battery pack and the power pack need to be turned off respectively, and then the battery pack and the power pack are connected from the parallel port, and then turned on to achieve capacity expansion. The defect of the prior art is that this static parallel method cannot achieve live paralleling, does not support hot swapping, and results in a poor user experience. Utility Model Content

[0004] The embodiment of the utility model provides a battery pack and a battery pack parallel power supply device to solve the above-mentioned technical problems.

[0005] A first aspect of an embodiment of the utility model provides a battery pack, including a control module, a first switch module, an output port, and a first parallel port;

[0006] One end of the first switch module is connected to the positive electrode of the battery pack and the output port respectively, the other end of the first switch module is connected to the first parallel port, and the control module is connected to the first switch module;

[0007] When the battery pack is in working state and the first parallel port is connected to the power pack, the control module controls the first switch module to be in a disconnected state.

[0008] Optionally, the battery pack includes a first battery module and a second switch module, the positive electrode of the first battery module is the positive electrode of the battery pack, the second switch module is connected between the positive electrode of the first battery module and the output port, the second switch module is also connected to the control module, and the first battery module and the first parallel port are connected to a common ground;

[0009] The control module controls the second switch module to be turned on, and when it is detected that the first parallel port is connected to a power pack, controls the first switch module to be turned off; when the power pack meets the parallel condition, controls the first switch module to be turned on.

[0010] Optionally, the battery pack further includes:

[0011] An inverter connected between the second switch module and the output port;

[0012] The inverter is used to transform the voltage output by the first battery module and superimpose it with the voltage output by the power pack for output; or, the inverter is used to transform the voltage input to the battery pack to charge the first battery module.

[0013] Optionally, the battery pack further includes:

[0014] an inverter, one end of which is respectively connected to one end of the first switch module and one end of the second switch module, and the other end of which is connected to the output port;

[0015] The inverter is used to transform the voltage output by the first battery module and the power-up pack to discharge the first battery module and the power-up pack; or, the inverter is used to transform the voltage input to the first battery module and the power-up pack to charge the first battery module and the power-up pack.

[0016] A second aspect of an embodiment of the utility model provides a battery pack parallel power supply device, the battery pack parallel power supply device comprises the battery pack described in the first aspect, and the first parallel port of the battery pack is connected to a power pack.

[0017] Optionally, the power-up package includes:

[0018] A second battery module;

[0019] A third switch module, a first end of the third switch module is connected to the positive electrode of the second battery module;

[0020] a fourth switch module, wherein a first end of the fourth switch module is connected to the positive electrode of the second battery module;

[0021] The second parallel port, the positive electrode interface of the second parallel port is respectively connected to the second end of the third switch module and the second end of the fourth switch module, and the negative electrode interface of the second parallel port is respectively connected to the negative electrode of the second battery module.

[0022] Optionally, the number of the power-up packs is N, where N is greater than or equal to 2, and each of the power-up packs includes a second parallel port and a third parallel port. The second parallel port of the first power-up pack is connected to the first parallel port, and starting from the second power-up pack, the power-up packs are connected in parallel step by step in a manner in which the second parallel port of the second power-up pack is connected to the third parallel port of the first power-up pack.

[0023] Optionally, the power-up package further includes:

[0024] A second battery module, wherein a negative electrode of the second battery module is connected to a negative electrode interface of the second parallel port and a negative electrode interface of the third parallel port respectively;

[0025] a third switch module, wherein a first end of the third switch module is connected to the positive electrode of the second battery module, and a second end of the third switch module is respectively connected to the positive electrode interface of the second parallel port and the positive electrode interface of the third parallel port;

[0026] A fourth switch module, wherein a first end of the fourth switch module is connected to the positive electrode of the second battery module, and a second end of the fourth switch module is respectively connected to the positive electrode interface of the second parallel port and the positive electrode interface of the third parallel port.

[0027] Optionally, the second end of the third switch module is also connected to an MPPT module, and the MPPT module is used to charge the second battery module.

[0028] Optionally, the control module is used to obtain the voltage of each power pack, obtain the parallel connection sequence of the power packs according to the voltage of each power pack, and control the power packs and the battery packs to be connected in parallel according to the parallel connection sequence.

[0029] The technical effect of the embodiment of the utility model is as follows: by setting a first switch module in the battery pack, the power output circuit and the parallel output circuit of the battery pack are separated; when the battery pack is in working state and needs to be paralleled, the second switch module is controlled to be turned off, so that the battery pack can be paralleled with the power pack when in working state; when the power pack meets the paralleling conditions, the second switch module is controlled to be turned on, thereby realizing hot swapping of the battery pack and the power pack, facilitating users to use the battery pack and the power pack for powering operations, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the parallel structure of the battery pack and the power pack provided by the prior art;

[0032] Figure 2 This is a schematic diagram of the structure of a battery pack provided by Embodiment 1 of the present utility model;

[0033] Figure 3 This is another structural schematic diagram of a battery pack provided by Embodiment 1 of the present utility model;

[0034] Figure 4 This is a schematic diagram of the structure of a battery pack provided by Embodiment 2 of the present utility model;

[0035] Figure 5 This is a schematic diagram of the structure of a battery pack provided by Embodiment 2 of the present utility model;

[0036] Figure 6 This is a schematic diagram of the structure of a battery pack parallel power supply device provided in Embodiment 3 of the present utility model;

[0037] Figure 7 It is a schematic diagram of the structure of a power pack in a battery pack parallel power supply device provided in Embodiment 3 of the present utility model;

[0038] Figure 8 This is another structural schematic diagram of a power pack in a battery pack parallel power supply device provided in Embodiment 3 of the present utility model;

[0039] Fig. 9 This is a schematic diagram of the structure of a battery pack parallel power supply device provided in the fourth embodiment of the present utility model;

[0040] Fig.10 It is a schematic diagram of the structure of a power pack in a battery pack parallel power supply device provided in the fourth embodiment of the present utility model;

[0041] Fig.11 This is another structural schematic diagram of a power pack in a battery pack parallel power supply device provided by the fourth embodiment of the present utility model;

[0042] Fig.12 This is a circuit diagram of a battery pack parallel power supply device provided in Embodiment 4 of the present utility model;

[0043] In the figure: 10, battery pack; 20, power pack; 21, first power pack; 22, second power pack; 30, battery pack parallel power supply device; 101, first battery module; 102, second switch module; 103, first switch module; 104, first parallel port; 105, control module; 106, inverter; 10, output port; 201, second battery module; 202, third switch module; 203, fourth switch module; 204, second parallel port; 205, MPPT module; 206, third parallel port; 301, third battery module; 302, fifth switch module; 303, sixth switch module; 304, fourth parallel port; 305, fifth parallel port. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] It should be understood that the utility model can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0046] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. On the contrary, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0047] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0048] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0049] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0050] Embodiment 1

[0051] The first embodiment of the utility model provides a battery pack, which solves the problem in the prior art that a power pack and a battery pack cannot be connected in parallel with power, resulting in poor user experience.

[0052] The first embodiment of the present invention provides a battery pack 10, such as Figure 2 As shown, the battery pack 10 includes: a control module 105, a first switch module 103, an output port 110 and a first parallel port 104;

[0053] One end of the first switch module 103 is connected to the positive electrode B+ of the battery pack 10 and the output port 110 respectively, the other end of the first switch module 103 is connected to the first parallel port 104, and the control module 105 is connected to the first switch module 103;

[0054] When the battery pack 10 is in working state and the first parallel port 104 is connected to the power pack 20 , the control module 105 controls the first switch module 103 to be in the disconnected state.

[0055] Among them, the first parallel port 104 is used to connect with the power pack 20 to realize the parallel connection of the battery pack 10 and the power pack 20; the output port 110 is used to output power, and can output the power of the battery pack 10 and / or the power pack 20; the first switch module 103 is connected between the output port 110 and the first parallel port 104. When the battery pack 10 is in working state and connected to the power pack 20, the control module 105 controls the first switch module 103 to be in a disconnected state, so that the battery pack 10 is parallel with the power pack 20 when working, and then communicates with the power pack 20. When the power pack 20 meets the parallel condition, the first switch module 103 is turned on to realize the battery pack 10 and the power pack 20 output power together.

[0056] The technical effect of the technical solution provided in the first embodiment is: by setting a first switch module in the battery pack, the power output circuit of the battery pack is separated from the parallel circuit of the power pack; when the battery pack is in working state and needs to be paralleled, the first switch module is controlled to be turned off, so that the battery pack can be paralleled with the power pack when in working state; when the power pack meets the parallel conditions, the first switch module is controlled to be turned on, thereby realizing hot swapping of the battery pack and the power pack, facilitating users to use the battery pack for powering operations and improving user experience.

[0057] The following embodiments may be used to connect the power output circuit inside the battery pack 10 and the parallel circuit of the power pack:

[0058] The battery pack 10 includes a first battery module 101 and a second switch module 102. The positive electrode B+ of the first battery module 101 is the positive electrode B+ of the battery pack 10. The second switch module 102 is connected between the positive electrode B+ of the first battery module 101 and the output port 110. The second switch module 102 is also connected to the control module 105. The negative electrode B- of the first battery module 101 is connected to the first parallel port 104.

[0059] The control module 105 controls the second switch module 102 to be turned on, and when it detects that the first parallel port 104 is connected to the power pack 20, controls the first switch module 103 to be turned off; when the power pack 20 meets the parallel condition, controls the first switch module 103 to be turned on.

[0060] Among them, the first battery module 101 is used to store electrical energy and energy supply in the battery pack 10, the second switch module 102 is used to control the first battery module 101 to output electrical energy and stop outputting electrical energy, and the second switch module 102 is connected to the control module 105; the control module 105 is used to control the on and off of the first switch module 102 and the second switch module 103, and the on and off state of the battery pack 10 is controlled by controlling the second switch module 102, and the parallel state of the power pack 20 and the battery pack 10 is controlled by controlling the first switch module 103. In this embodiment, the control module 105 controls the powered parallel process of the power pack 20 and the battery pack 10 as follows: when the control module 105 controls the second switch module 102 to be turned on, and detects that the first parallel port 104 is connected to the power pack 20, the first switch module 103 is controlled to be disconnected to ensure circuit safety. The control module 105 continues to communicate with the power pack 20 until it is detected that the power pack 20 meets the parallel condition. The parallel condition can be that the voltage difference between the voltage of the battery pack 10 and the voltage of the power pack 20 is within a preset range. The control module 105 controls the first switch module 103 to be turned on, and the power pack 20 and the battery pack 10 jointly output electrical energy.

[0061] The advantage of this embodiment is that the control module can ensure that when the power-up pack is connected to the battery pack but the parallel conditions are not met, the first switch module is controlled to be disconnected, thereby avoiding parallel connection of the battery pack and the power-up pack when the parallel conditions are not met, reducing the risks in the battery pack parallel connection process.

[0062] Embodiment 2

[0063] The second embodiment of the present invention provides a battery pack 10 , which realizes different functions by setting a connection relationship between an inverter 106 and a first switch module 103 and a second switch module 102 .

[0064] The technical solution provided in the second embodiment of the present utility model is based on the technical solution provided in the first embodiment, such as Figure 4 As shown in the figure, as the first embodiment of the connection relationship between the inverter 106 and the first switch module 103 and the second switch module 102, the battery pack 10 further includes:

[0065] An inverter 106, the inverter 106 is connected between the second switch module 102 and the output port 110;

[0066] The inverter 106 is used to transform the voltage output by the first battery module 101 and superimpose it with the voltage output by the power pack 20 for output; or, the inverter 106 is used to transform the voltage input to the battery pack 10 to charge the first battery module 101.

[0067] The inverter 106 is an electric energy converter for current conversion. When energy needs to be released from the first battery module 101, the inverter 106 converts the DC voltage output by the first battery module 101 into DC or AC, and superimposes it with the voltage output by the power pack 20 so as to supply it to the external load, thereby realizing the discharge operation of the battery pack 10. When energy needs to be stored in the first battery module 101, the inverter 106 converts the external input AC voltage into a DC voltage suitable for the first battery module 101, thereby realizing the charging operation of the battery pack 10.

[0068] The advantages of this embodiment 1 are: the inverter can realize bidirectional energy conversion of the battery pack, and can perform both discharge and charge operations. The inverter can convert the voltage output by the battery pack into the required voltage of the load. The battery pack output port superimposes the voltage output by the inverter with the voltage output by the power pack, and provides it to the external load to meet the external load's demand for electrical energy, thereby maintaining the stability and reliability of power supply.

[0069] As a second embodiment of the connection relationship between the inverter 106 and the first switch module 103 and the second switch module 102, Figure 5 As shown, the battery pack 10 also includes:

[0070] An inverter 106, one end of the inverter 106 is respectively connected to one end of the first switch module 103 and one end of the second switch module 102, and the other end of the inverter 106 is connected to the output port 110;

[0071] The inverter 106 is used to transform the voltage output by the first battery module 101 and the power pack 20 to discharge the first battery module 101 and the power pack 20; or, the inverter 106 is used to transform the voltage input to the first battery module 101 and the power pack 20 to charge the first battery module 101 and the power pack 20.

[0072] The difference between the second embodiment and the first embodiment is that the first battery module 101 of the battery pack 10 and the power pack 20 share an inverter 106. When energy needs to be released, the inverter 106 transforms the voltage output by the first battery module 101 and the power pack 20 so that the battery pack 10 and the power pack 20 can discharge. When energy needs to be stored in the battery pack 10, the inverter 106 transforms the voltage input to the first battery module 101 and the power pack 20 to meet the charging requirements of the battery pack 10 and the power pack 20.

[0073] The advantages of the second embodiment are: since the battery pack and the power pack share one inverter, the number of components and space occupied by the power pack can be reduced, which facilitates the miniaturization of the power pack, and since all battery modules share one inverter, the performance and operating characteristics between the battery pack and the power pack are more consistent, reducing the imbalance problem caused by differences between battery modules and improving the stability and reliability of the entire system. In addition, the circuit structures of the battery pack and the power pack are different. The parallel technology makes the power pack have fewer inverters than the battery pack, and the main control board of the power pack is relatively simpler than the main control board of the battery pack, and the cost is lower.

[0074] Embodiment 3

[0075] A third embodiment of the present invention provides a battery pack parallel power supply device 30, which is a power supply device composed of a battery pack 10 and a power pack 20 connected in parallel.

[0076] The technical solution provided in the third embodiment of the present utility model is based on the technical solutions provided in the first and second embodiments, such as Figure 6 As shown, a battery pack parallel power supply device 30 includes the battery pack 10 provided in the first and second embodiments, and the first parallel port 104 of the battery pack 10 is connected to the power pack 20 .

[0077] The technical effect of the technical solution provided in the third embodiment is that by reasonably configuring the battery pack and the power pack, flexible and reliable large-power output can be achieved, stable power supply support can be provided for various power equipment, and the use of the battery pack is increased.

[0078] As an implementation method, the number of the power pack 20 is one, such as Figure 7 As shown, the power-up pack 20 includes:

[0079] A second battery module 201;

[0080] A third switch module 202, a first end of the third switch module 202 is connected to the positive electrode of the second battery module 201;

[0081] A fourth switch module 203, a first end of the fourth switch module 203 is connected to the positive electrode of the second battery module 201;

[0082] The second parallel port 204 has a positive electrode interface connected to the second end of the third switch module 202 and the second end of the fourth switch module 203 , and a negative electrode interface connected to the negative electrode of the second battery module 201 .

[0083] Among them, the second battery module 201 is used to store energy and provide power, and can be charged or discharged as needed. The third switch module 202 is used to control the direction of current flow and the working state of the second battery module 201. The fourth switch module 203 is used to control the working state of the power pack 20 and the battery pack 10 when they are connected in parallel. The second parallel port serves as the output interface of the power pack 20, which is used to connect the battery pack 10 to provide power support. The positive interface of the second parallel port 204 is connected to the positive interface of the first parallel port 104, and the negative interface of the second parallel port 204 is connected to the negative interface of the first parallel port 104.

[0084] The working process of this embodiment is as follows: when the power pack 20 is connected to the battery pack 10 through the second parallel port 204, the second switch module 103 of the battery pack 10 and the fourth switch module 203 of the power pack 20 are configured to be in the disconnected state. At this time, the third switch module 202 can be in the on state or in the off state. When the power pack 20 meets the parallel condition, the second switch module 103 of the battery pack 10 and the fourth switch module 203 of the power pack 20 are configured to be in the on state, and the power pack 20 and the battery pack 10 complete the parallel connection and output electrical energy.

[0085] The advantage of this embodiment is that through the cooperation between the third switch module and the fourth switch module, coordinated work between the battery pack and the power pack is achieved, the power efficiency and reliability of the system are improved, and it is suitable for various application scenarios that require reliable power support.

[0086] Further, such as Figure 8 As shown, the second end of the third switch module 202 is also connected to the MPPT module 205 , and the MPPT module 205 is used to charge the second battery module 201 .

[0087] The MPPT (Maximum Power Point Tracking) module is a power converter whose main function is to optimize the power output of the solar panel to ensure the maximum power output under different lighting conditions. The MPPT module 205 is used to charge the second battery module 201 through the third switch module 202.

[0088] The advantages of this embodiment are: the MPPT module ensures the maximum conversion efficiency of solar energy by real-time monitoring and adjusting the working point of the solar cell panel. At the same time, the third switch module can be in the on state during the parallel operation, so that the MPPT module can charge the second battery module at any time.

[0089] Embodiment 4

[0090] A fourth embodiment of the present invention provides a battery pack parallel power supply device 30, which is a power supply device composed of a battery pack 10 and a plurality of power packs 20 connected in parallel.

[0091] The technical solution provided in the fourth embodiment of the present utility model is based on the technical solutions provided in the first to third embodiments, such as Fig. 9 As shown, the battery pack parallel power supply device 30 includes the battery pack 10 provided in Example 1 and Example 2 and the power pack 20 provided in Example 3. The first parallel port 104 of the battery pack 10 is connected to the power pack 20. The number of the power packs 20 is N, where N is greater than or equal to 2. Each power pack 20 includes a second parallel port and a third parallel port. The second parallel port 204 of the first power pack 21 is connected to the first parallel port 104. Starting from the second power pack 22, the power packs 2N are connected in parallel step by step in a manner that the second parallel port 204 of the second power pack 22 is connected to the third parallel port 206 of the first power pack 21.

[0092] The difference between the fourth embodiment and the third embodiment is that there are multiple power packs 20, which are auxiliary components in the power supply device and are used to increase the power output capacity. By cascading multiple power packs 20 to the battery pack 10, long-term power supply is achieved. Each power pack 20 includes a second parallel port and a third parallel port. The second parallel port is used to connect to the parallel port of the previous power pack 20 or the battery pack 10 to extend the parallel power supply. The third parallel port is used to connect to the parallel port of the next power pack 20 to extend the parallel power supply link.

[0093] The technical effect of this embodiment is that by connecting multiple power packs in parallel, the power supply is expanded and enhanced. The step-by-step parallel connection method is adopted to ensure the continuity and stability of the power output, increase the scalability and flexibility of the system, and the number of power packs can be increased or decreased at any time according to actual needs to meet the power needs in different scenarios.

[0094] As an implementation method, Fig.10 As shown, the power pack 20 also includes:

[0095] A second battery module 201, wherein the negative electrode of the second battery module 201 is connected to the negative electrode interface of the second parallel port 204 and the negative electrode interface of the third parallel port 206 respectively;

[0096] A third switch module 202, wherein a first end of the third switch module 202 is connected to the positive electrode of the second battery module, and a second end of the third switch module 202 is connected to the positive electrode interface of the second parallel port 204 and the positive electrode interface of the third parallel port 206;

[0097] The fourth switch module 203 has a first end connected to the positive electrode of the second battery module, and a second end connected to the positive electrode interface of the second parallel port 204 and the positive electrode interface of the third parallel port 206 .

[0098] In this embodiment, the second battery module 201, the third switch module 202 and the fourth switch module 203 are the same as those in the above embodiment, and are not described in detail here.

[0099] As an implementation of the structure of the power pack 20, Fig.11 As shown, the second end of the third switch module 202 is also connected to the MPPT module 205 , and the MPPT module 205 is used to charge the second battery module 201 .

[0100] Among them, the function of the MPPT module 205 is the same as the function of the MPPT module 205 in the above embodiment, and will not be repeated here.

[0101] As an implementation method of controlling the parallel connection process, when a battery pack 10 is connected in parallel with multiple power packs 20, the parallel connection process of the power packs and the battery pack is as follows: the control module 105 is used to obtain the voltage of each power pack 20, obtain the parallel connection sequence of the power packs 20 according to the voltage of each power pack 20, and control the power packs 20 and the battery pack 10 to be connected in parallel according to the parallel connection sequence.

[0102] Among them, the battery pack 10 and the power pack 20 communicate using the CAN protocol. When paralleling, the power pack 20 waits for the CAN synchronization data frame of the battery pack 10 after the address is successfully allocated. When the battery pack 10 detects that the number of power packs 20 is greater than or equal to 2, it broadcasts the synchronization data frame. After receiving the synchronization data frame, the power pack 20 broadcasts the voltage, capacity and other information of its own battery. After the battery pack 10 collects the information of all the power packs 20, it obtains the parallel order of the power packs according to the principle of giving priority to the power pack with the highest voltage, and sends a control instruction to the power pack 20. The power pack with the highest voltage is connected in parallel according to the parallel order, so that it forms a parallel state with the battery pack 10, until the voltage of the power pack is not the highest voltage, and then the parallel power pack is replaced.

[0103] The advantages of this embodiment are: the logical control in this embodiment enables the battery pack to automatically detect and determine the parallel order of the power packs, thereby realizing an automated parallel process. According to the voltage of the power packs, the battery pack can preferentially discharge the high-voltage power packs to achieve optimization of charging and discharging. By dynamically adjusting the parallel connection, the stability and reliability of the system during operation are ensured. This embodiment is suitable for different numbers of power packs and can dynamically adjust the parallel order according to actual conditions. It has strong adaptability and flexibility.

[0104] The above embodiment of the utility model is described in detail below through a specific circuit structure. Fig.12 As shown, the battery pack parallel power supply device 30 includes a battery pack 10, a first power pack 21 and a second power pack 22. The battery pack 10 includes a first battery module 101, a first switch module 103, a second switch module 102, a first parallel port 104, a control module 105 and an output port A. The second switch module 102 includes MOS tubes M1 and M2. The first switch module 103 includes MOS tubes M3 and M4. The positive electrode of the first battery module 101 is connected to the drain of the MOS tube M1, the source of the MOS tube M1 is connected to the source of the MOS tube M2, the drain of the MOS tube M2 is respectively connected to the drain of the MOS tube M3 and the output port A, the source of the MOS tube M3 is connected to the source of the MOS tube M4, the drain of the MOS tube M4 is connected to the positive electrode port of the first parallel port 104, the control module 105 is respectively connected to the gate of the MOS tube M1, the gate of the MOS tube M2, the gate of the MOS tube M3 and the gate of the MOS tube M4, and the negative electrode of the first battery module 101 is connected to the negative electrode port of the first parallel port 104.

[0105] The first power pack 21 includes a second battery module 201, a third switch module 202, a fourth switch module 203, a second parallel port 204 and a third parallel port 206. The third switch module 202 includes MOS transistors M5 and M6. The fourth switch module 203 includes MOS transistors M7 and M8. The positive electrode of the second battery module 201 is respectively connected to the drain of the MOS tube M5 and the drain of the MOS tube M7, the source of the MOS tube M5 is connected to the source of the MOS tube M6, the source of the MOS tube M7 is connected to the source of the MOS tube M8, the drain of the MOS tube M6 and the drain of the MOS tube M8 are connected together and respectively connected to the positive port of the second parallel port 204 and the positive port of the third parallel port 206, the negative electrode of the second battery module 201 is respectively connected to the negative port of the second parallel port 204 and the negative port of the third parallel port 206, the positive port of the second parallel port 204 is connected to the positive port of the first parallel port 104, and the negative port of the second parallel port 204 is connected to the negative port of the first parallel port 104.

[0106] The second power pack 22 includes a third battery module 301, a fifth switch module 302, a sixth switch module 303, a fourth parallel port 304, and a fifth parallel port 305. The fifth switch module 302 includes a MOS transistor M9 and a MOS transistor M10, and the sixth switch module 303 includes a MOS transistor M11 and a MOS transistor M12. The second parallel port 204 of the first power pack 20 is connected to the first parallel port 104 of the battery pack 10, and the third parallel port 206 of the first power pack 20 is connected to the fifth parallel port 305 of the second power pack 30. The positive electrode of the third battery module 301 is respectively connected to the drain of the MOS tube M9 and the drain of the MOS tube M11, the source of the MOS tube M9 is connected to the source of the MOS tube M10, the source of the MOS tube M11 is connected to the source of the MOS tube M12, the drain of the MOS tube M10 and the drain of the MOS tube M12 are connected together and respectively connected to the positive port of the fourth parallel port 304 and the positive port of the fifth parallel port 305, the negative electrode of the second battery module 201 is respectively connected to the negative port of the fourth parallel port 304 and the negative port of the fifth parallel port 305, the positive port of the fifth parallel port 305 is connected to the positive port of the third parallel port 206, and the negative port of the fifth parallel port 305 is connected to the negative port of the third parallel port 206.

[0107] Among them, the battery pack 10 is provided with a group of DI and DO signal pins, and the first power pack 21 and the second power pack 22 are provided with two groups of DI and DO pins for address allocation transmission. The DI pin of the battery pack 10 is connected to the DO pin of the first power pack 21, the DO pin of the battery pack 10 is connected to the DI pin of the first power pack 21, the DI pin of the first power pack 21 is connected to the DO pin of the second power pack, and the DO pin of the first power pack 21 is connected to the DI pin of the second power pack. When the DI and DO pins are disconnected, the second switch module 103, the fourth switch module 203, and the sixth switch module 303 are turned off. In the power-on connection state, when the communication is not connected, the second switch module 103, the fourth switch module 203, and the sixth switch module 303 are turned off, the voltage of the first parallel port 104 of the battery pack 10 is 0, and the voltage of the parallel port of the first power pack 21 and the second power pack 22 is 0. The battery pack 10 and the first power pack 21 and the second power pack 22 are connected from the parallel port, and after the communication is established and the parallel conditions are met, the power pack with the largest voltage is turned on to realize hot plugging.

[0108] The beneficial effects of this implementation are: supporting plug-and-play, this implementation connects the power pack charging / load terminal P+ / BAK to the battery pack charging / load terminal P+ through a pair of MOSFETs, and the load circuit of the power pack is separated from its parallel circuit, regardless of whether it is in the on state or not, when not in parallel, the parallel MOSFET is turned off, the battery pack parallel port voltage is 0, and the voltage of the power pack parallel port meets the agreed voltage difference range, the battery pack and the power pack are connected through the parallel port, under certain conditions, the parallel MOSFET and the power pack charging and discharging MOSFET are turned on, then the battery pack and the power pack form a parallel state, the control circuit between the battery pack and the power pack enables the power pack to be hot-swappable, which is more convenient to use than traditional parallel technology and improves user experience.

[0109] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: include: A control module (105), a first switch module (103), an output port (110) and a first parallel port (104); One end of the first switch module (103) is respectively connected to the positive electrode (B+) of the battery pack (10) and the output port (110), the other end of the first switch module (103) is connected to the first parallel port (104), and the control module (105) is connected to the first switch module (103); When the battery pack (10) is in a working state and the first parallel port (104) is connected to a power pack (20), the control module (105) controls the first switch module (103) to be in a disconnected state.

2. The battery pack according to claim 1, characterized in that: The battery pack (10) further comprises a first battery module (101) and a second switch module (102); the positive electrode (B+) of the first battery module (101) is the positive electrode (B+) of the battery pack (10); the second switch module (102) is connected between the positive electrode (B+) of the first battery module (101) and the output port (110); the second switch module (102) is also connected to the control module (105); the negative electrode (B-) of the first battery module (101) is connected to a common ground with the first parallel port (104); The control module (105) controls the second switch module (102) to be turned on, and when it detects that the first parallel port (104) is connected to the power pack (20), controls the first switch module (103) to be turned off; when the power pack (20) meets the parallel condition, controls the first switch module (103) to be turned on.

3. The battery pack according to claim 2, characterized in that: The battery pack (10) further comprises: An inverter (106), the inverter (106) being connected between the second switch module (102) and the output port (110); The inverter (106) is used to transform the voltage output by the first battery module (101) and then add it to the voltage output by the power pack (20) for output; or, the inverter (106) is used to transform the voltage input to the battery pack (10) to charge the first battery module (101).

4. The battery pack according to claim 2, characterized in that: The battery pack (10) further comprises: An inverter (106), one end of the inverter (106) being connected to the first switch module (103) and the second switch module (102), respectively, and the other end of the inverter (106) being connected to the output port (110); The inverter (106) is used to transform the voltage output by the first battery module (101) and the power pack (20) so as to discharge the first battery module (101) and the power pack (20); or, the inverter (106) is used to transform the voltage input to the first battery module (101) and the power pack (20) so as to charge the first battery module (101) and the power pack (20).

5. A battery pack parallel power supply device, characterized in that: The battery pack parallel power supply device (30) comprises the battery pack (10) according to any one of claims 1 to 4, and the first parallel port (104) of the battery pack (10) is connected to the power pack (20).

6. The battery pack parallel power supply device according to claim 5, characterized in that: The power-up package (20) comprises: A second battery module (201); a third switch module (202), wherein a first end of the third switch module (202) is connected to the positive electrode of the second battery module (201); a fourth switch module (203), wherein a first end of the fourth switch module (203) is connected to the positive electrode of the second battery module (201); A second parallel port (204), wherein the positive electrode interface of the second parallel port (204) is respectively connected to the second end of the third switch module (202) and the second end of the fourth switch module (203), and the negative electrode interface of the second parallel port (204) is connected to the negative electrode of the second battery module (201).

7. The battery pack parallel power supply device according to claim 6, characterized in that: The number of the power-up packs (20) is N, wherein N is greater than or equal to 2, and each of the power-up packs (20) comprises a second parallel port (204) and a third parallel port (206), the second parallel port (204) of the first power-up pack (21) is connected to the first parallel port (104), and starting from the second power-up pack (22), the second parallel port (204) of the second power-up pack (22) is connected to the third parallel port (206) of the first power-up pack (21) in a step-by-step manner to connect to the Nth power-up pack (2N) in parallel.

8. The battery pack parallel power supply device according to claim 7, characterized in that: The power-up package (20) further comprises: A second battery module (201), wherein a negative electrode of the second battery module (201) is respectively connected to a negative electrode interface of the second parallel port (204) and a negative electrode interface of the third parallel port (206); a third switch module (202), wherein a first end of the third switch module (202) is connected to the positive electrode of the second battery module (201), and a second end of the third switch module (202) is respectively connected to the positive electrode interface of the second parallel port (204) and the positive electrode interface of the third parallel port (206); A fourth switch module (203), wherein a first end of the fourth switch module (203) is connected to the positive electrode of the second battery module (201), and a second end of the fourth switch module (203) is respectively connected to the positive electrode interface of the second parallel port (204) and the positive electrode interface of the third parallel port (206).

9. The battery pack parallel power supply device according to claim 6 or 8, characterized in that: The second end of the third switch module (202) is also connected to an MPPT module (205), and the MPPT module (205) is used to charge the second battery module (201).

10. The battery pack parallel power supply device according to claim 7, characterized in that: The control module (105) is used to obtain the voltage of each power pack (20), obtain the parallel connection sequence of the power packs (20) according to the voltage of each power pack (20), and control the power packs (20) and the battery pack (10) to be connected in parallel according to the parallel connection sequence.

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