Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, the battery pack comprises a box body, the box body is internally provided with a first chamber and a second chamber which are separated by a heat conduction wall body, and the first chamber is used for accommodating heat conduction liquid; the heat conduction assembly is arranged in the second cavity, a plurality of first battery cell holes are formed in the heat conduction assembly, and the heat conduction assembly is in heat conduction connection with the cavity wall of the second cavity; the battery assembly comprises a plurality of battery cells, and each battery cell is arranged in the corresponding first battery cell hole and is in heat conduction connection with the hole wall of the corresponding first battery cell hole, so that the battery cells can exchange heat with the heat conduction liquid. According to the technical scheme, the closed box body structure is adopted, the heat conduction liquid, the heat conduction assembly and the battery cells in the box body are utilized for heat exchange, heat generated by the battery cells is dissipated to the outside through the heat conduction liquid and the box body, the battery pack does not need to be provided with a special external circulation system, the risk of liquid leakage of a pipeline is avoided, energy consumption is reduced, and the battery pack is more energy-saving and environment-friendly. The cost is low, and a high protection level can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery pack and an electrical device. Background Art

[0002] At present, the heat generation problem during the charging and discharging process of batteries has always been a bottleneck problem troubling the battery industry. Especially for battery packs or battery groups with large capacitance, if the heat generated during battery use cannot be dissipated in time, the operating temperature of the battery will be too high, which is likely to cause a decrease in battery performance efficiency and service life, and even damage to the battery or related equipment. Existing battery products mainly use air cooling, water cooling, air-conditioning cooling and other methods for heat dissipation. Among them, water cooling and air-conditioning cooling both require a complex cooling circulation system to be configured and connected to the cooling pipelines inside the battery to exchange heat and cool the inside of the battery by pumping the circulating coolant. However, the above heat dissipation methods have complex structures, large space occupation, high system energy consumption, high equipment costs, and it is difficult to achieve a high protection level because the inside and outside of the battery are connected by pipelines. Moreover, there is a risk of liquid leakage at the pipeline connection, posing a safety hazard. Summary of the Utility Model

[0003] In order to solve the problems in the prior art that the battery heat dissipation system has a complex structure, large space occupation and high energy consumption, a risk of liquid leakage in the pipeline, high equipment costs and it is difficult to achieve a high protection level, the present application provides a battery pack and an electrical device.

[0004] According to an embodiment of the first aspect of the present application, a battery pack is provided, including: a box body, in which a first chamber and a second chamber are provided, the first chamber and the second chamber are separated by a heat-conducting wall body, and the first chamber is used to accommodate a heat-conducting liquid; a heat-conducting component, arranged in the second chamber, with a plurality of first battery cell holes provided inside the heat-conducting component, and the heat-conducting component is in heat-conducting connection with the wall of the second chamber; and a battery component, including a plurality of battery cells, each battery cell is arranged in a corresponding first battery cell hole and is in heat-conducting connection with the hole wall of the corresponding first battery cell hole, so that the battery cells can exchange heat with the heat-conducting liquid in the first chamber through the heat-conducting component and the heat-conducting wall body.

[0005] In a further embodiment of the present application, one battery cell is correspondingly arranged in each first battery cell hole.

[0006] In a further embodiment of the present application, the heat-conducting component includes: a heat-conducting bracket, on which a plurality of first cell holes are formed, and each first cell hole penetrates through both ends of the heat-conducting bracket along a first direction; and two insulating brackets, respectively connected to both ends of the heat-conducting bracket in the first direction, and a plurality of second cell holes penetrating along the first direction are provided on each insulating bracket, and each second cell hole is correspondingly arranged with one of the first cell holes; wherein, both ends of each cell extend out of the first cell hole and are respectively inserted into the corresponding second cell holes.

[0007] In a further embodiment of the present application, a positioning groove is provided on at least one outer sidewall of the heat-conducting bracket, and the positioning groove penetrates through both ends of the heat-conducting bracket along the first direction; a positioning protrusion adapted to the positioning groove is provided on the inner sidewall of the second chamber, and the positioning protrusion extends along the first direction and forms a positioning fit with the corresponding positioning groove.

[0008] In a further embodiment of the present application, the heat-conducting component further includes two insulating end caps, which are respectively arranged at both ends of the cell in the first direction and cover one end of the corresponding insulating bracket away from the heat-conducting bracket; mounting holes are provided at corresponding positions on the heat-conducting bracket, the insulating bracket and the insulating end cap, the mounting holes penetrate along the first direction, and fixing screws are inserted into the mounting holes, and both ends of the fixing screws are fixedly connected to the box body; wherein, the mounting holes are misaligned with the first cell holes and the second cell holes in the row direction and / or the column direction.

[0009] In a further embodiment of the present application, a flange structure is provided at the edge of one end of the insulating bracket away from the heat-conducting bracket, the flange structure extends along the first direction, and a plurality of first clamping structures are provided on the outer sidewall of the insulating bracket in the circumferential direction; a first groove is provided on the end face of one end of the insulating end cap facing the heat-conducting bracket, and a plurality of second clamping structures adapted to the first clamping structures are provided on the inner sidewall of the first groove, the flange structure extends into the first groove, and the first clamping structure is clamped and fixed with the corresponding second clamping structure.

[0010] In a further embodiment of the present application, at least two cells are connected in series or in parallel through a connecting piece; the battery pack further includes a switching power supply module and at least one electronic control module, and the switching power supply module and the electronic control module are electrically connected to the cells; wherein, the switching power supply module is used to control the input and output voltage of the battery assembly, and the electronic control module is used to control the charging and discharging process of the battery assembly.

[0011] In a further embodiment of the present application, the battery pack further includes: a temperature collector disposed inside the box for collecting the temperature information inside the box. The temperature collector is electrically connected to the electronic control module and can transmit the collected temperature information to the electronic control module; and a heater disposed in the first chamber and fixedly connected to the box. The heater is electrically connected to the electronic control module to heat the heat-conducting liquid in the first chamber under the control of the electronic control module.

[0012] In a further embodiment of the present application, the box includes: a main box shell with a heat-conducting wall body disposed inside. The heat-conducting wall body divides the main box shell into a first chamber and a second chamber, and at least one end of the main box shell in the first direction is a through structure; at least one outer box cover disposed at the through end of the main box shell in the first direction and detachably connected to the main box shell. The outer box cover abuts against the heat-conducting wall body, and sealing structures are provided at the joints between the outer box cover and the heat-conducting wall body and between the outer box cover and the main box shell, so that the first chamber and the second chamber form independent sealed chambers.

[0013] In an embodiment of the technical solution of the second aspect of the present application, an electrical equipment is further provided, including the battery pack in any one of the embodiments of the first aspect above.

[0014] Beneficial effects of the above technical solutions of the present application:

[0015] According to the battery pack in the present application, by adopting a closed box structure and using the heat exchange between the heat-conducting liquid, heat-conducting components and battery cells inside the box, the battery cells can conduct the generated heat to the heat-conducting liquid in the first chamber through the heat-conducting bracket and the heat-conducting wall body in sequence, and then dissipate it to the outside through the box, realizing the heat dissipation of the battery cells; the overall structure of the battery pack is simple, without the need to set up a dedicated external circulation system, avoiding the risk of pipeline liquid leakage, reducing energy consumption, and having a lower cost compared with common liquid cooling and air cooling heat dissipation devices, and being able to reach a higher protection level, which is beneficial to applications in places with high explosion-proof requirements such as underground mines and tunnels. Description of the Drawings

[0016] Figure 1 It is a partial exploded view of the battery pack in an embodiment of the present application;

[0017] Figure 2 It is a structural schematic diagram of the battery pack in an embodiment of the present application;

[0018] Figure 3 It is an internal structural schematic diagram of the battery pack in an embodiment of the present application;

[0019] Figure 4 It is Figure 3 The internal structural schematic diagram of the battery pack in

[0020] Figure 5Schematic diagram of a heat conduction component and an electric core in an embodiment of the present application;

[0021] Figure 6 Schematic diagram of a main box shell in an embodiment of the present application;

[0022] Figure 7 Schematic diagram of the heat conduction component in the assembled state in an embodiment of the present application.

[0023] Figure 8 Schematic diagram of a heat conduction bracket in an embodiment of the present application.

[0024] Figure 9 Schematic diagram of a part of the heat conduction component and the electric core in an embodiment of the present application.

[0025] Figure 10 Exploded state schematic diagram of a battery pack in an embodiment of the present application.

[0026] Figure 11 Partial structure exploded state schematic diagram of the battery pack from another perspective in an embodiment of the present application.

[0027] Figure 12 Cross-sectional view of a battery pack in an embodiment of the present application.

[0028] Figure 13 Schematic block diagram of an electrical device in an embodiment of the present application.

[0029] Wherein, the arrow F1 in the above-mentioned drawings represents the first direction.

[0030] Explanation of reference numerals:

[0031] 100 Battery pack;

[0032] 1 Box body, 11 Main box shell, 111 First chamber, 112 Second chamber, 113 Positioning protrusion, 114 Heat conduction wall body, 115 First bolt hole, 12 Outer box cover, 121 Second bolt hole, 122 Sealing structure;

[0033] 2 Heat conduction component, 21 Heat conduction bracket, 211 First electric core hole, 212 Positioning groove, 22 Insulating bracket, 221 Second electric core hole, 222 Flange structure, 223 First clamping structure, 23 Insulating end cover, 231 First groove, 232 Second clamping structure, 24 Mounting hole, 25 Fixed screw;

[0034] 3 Battery component, 31 Electric core, 32 Adapter plate; 41 Switching power supply module, 42 Electric control module, 421 Battery management module, 422 Balancing management module, 43 Temperature collector, 44 Heater.

[0035] 500 Electrical device. Detailed implementation manners

[0036] The present application will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners. Similar components in different implementation manners adopt related similar component numbers. In the following implementation manners, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other components, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid overwhelming the core part of the present application with excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0037] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various implementation manners, and the operation steps involved in each embodiment can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the specification and the drawings are only for clearly describing a certain embodiment, and do not mean that they are essential components and / or sequences.

[0038] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0039] The following are some embodiments of the battery pack and the electrical equipment provided by the present application.

[0040] The battery pack in the present application mainly includes a box body, a heat conduction component, and a battery component. By separating an enclosed box body into an independent first chamber and a second chamber through a heat conduction wall body, the first chamber is used to accommodate a heat conduction liquid, and a heat conduction component thermally connected to the chamber wall is arranged in the second chamber. A plurality of battery cells of the battery component are arranged in the first cell holes of the heat conduction component, and the battery cells are thermally connected to the hole walls of the first cell holes. Thus, heat exchange is carried out among the heat conduction liquid accommodated in the first chamber, the heat conduction wall body, and the heat conduction component and the battery cells, so that the heat generated by the battery cells can be sequentially conducted to the heat conduction liquid in the first chamber through the heat conduction support and the heat conduction wall body, and then dissipated to the outside through the box body, realizing uniform heat dissipation of the battery cells. The overall structure of the battery pack is simple, without the need to set up a dedicated external circulation system, avoiding the risk of pipeline liquid leakage, reducing energy consumption, and having a lower cost. At the same time, the battery pack has high safety and can reach a high protection level, which is beneficial to applications in places with high explosion-proof requirements such as underground mines and tunnels.

[0041] In an embodiment of the first aspect of the present application, a battery pack 100 is provided. As Figure 1 、 Figure 2 and Figure 3 shown, the battery pack 100 includes a box body 1, a heat conduction component 2, and a battery component 3. A closed first chamber 111 and a second chamber 112 are provided inside the box body 1, and the first chamber 111 and the second chamber 112 are separated by a heat conduction wall 114; wherein, the heat conduction component 2 and the battery component 3 are arranged in the second chamber 112, and the first chamber 111 is used to accommodate a heat conduction liquid. The box body 1 can be as Figure 1 shown, assembled from a plurality of split structures so as to be disassembled and assembled. After assembly, the first chamber 111 and the second chamber 112 are independent closed chambers. The heat conduction component 2 is provided with a plurality of first battery cell holes 211, and the heat conduction component 2 is in heat conduction connection with the chamber wall of the second chamber 112. The battery component 3 includes a plurality of battery cells 31, and each battery cell 31 is arranged in a corresponding first battery cell hole 211 and is in heat conduction connection with the hole wall of the first battery cell hole 211 of the heat conduction component 2, so that heat conduction can be carried out between the battery cell 31, the heat conduction component 2, the heat conduction wall 114, and the box body 1. During use, the heat generated by the operation of the battery cell 31 can sequentially pass through the heat conduction component 2 and the heat conduction wall 114 and be transferred to the first chamber 111, and exchange heat with the heat conduction liquid, thereby realizing heat dissipation and temperature reduction of the battery cell 31.

[0042] It can be understood that in practical applications, since heat is transferred from the side with a higher temperature to the side with a lower temperature, when the temperature of the battery cell 31 is lower than the temperature of the heat conduction liquid, the heat of the heat conduction liquid can also pass through the heat conduction wall 114 and the heat conduction component 2 and be transferred to the battery cell 31 to play a heat preservation role for the battery cell 31.

[0043] It should be noted that the heat conduction component 2 and the chamber wall of the second chamber 112 can be in direct contact to form a heat conduction connection, or can form a heat conduction connection by filling a heat conduction medium. For example, heat conduction silicone grease is filled between the heat conduction component 2 and the chamber of the second chamber 112. Similarly, the battery cell 31 and the hole wall of the first battery cell hole 211 can be in direct contact to form a heat conduction connection, or can form a heat conduction connection by filling a heat conduction medium. For example, heat conduction silicone grease is filled between the battery cell 31 and the hole wall of the first battery cell hole 211. The heat conduction liquid includes but is not limited to water and coolant.

[0044] In addition, the first chamber 111 and the second chamber 112 are not limited to being as Figure 1The arrangement shown (i.e., the first chamber 111 is located above the second chamber 112) can also adopt other arrangements according to the usage requirements. For example, the first chamber 111 is located below the second chamber 112, or the first chamber 111 and the second chamber 112 are arranged horizontally left and right, or the first chamber 111 is arranged circumferentially around the second chamber 112, etc. The heat exchange effect can also be achieved.

[0045] In a further embodiment of the present application, as Figure 4 shown, the battery cells 31 correspond to the first battery cell holes 211 one by one, and one battery cell 31 is arranged in each first battery cell hole 211, which can reasonably utilize the space for easy assembly. In addition, only one battery cell 31 is arranged in each first battery cell hole 211, which can also enable each battery cell 31 to independently perform heat exchange. Moreover, the contact area between a single battery cell 31 and the hole wall of the first battery cell hole 211 is large, and the heat exchange efficiency is higher, making the heat temperature of each battery cell 31 in the battery assembly 3 relatively uniform.

[0046] In a further embodiment of the present application, as Figure 1 and Figure 4 shown, the heat conduction component 2 includes a heat conduction bracket 21 and two insulating brackets 22. A plurality of first battery cell holes 211 are formed in the heat conduction bracket 21, and each first battery cell hole 211 penetrates through both ends of the heat conduction bracket 21 along the first direction; the battery cells 31 are arranged in the corresponding first battery cell holes 211 along the first direction, and both ends of the battery cells 31 extend out from both ends of the first battery cell holes 211 respectively. The two insulating brackets 22 are respectively arranged at both ends of the heat conduction bracket 21 in the first direction and are both connected to the heat conduction bracket 21; a plurality of second battery cell holes 221 corresponding to the first battery cell holes 211 are formed in the insulating brackets 22, and the second battery cell holes 221 penetrate through both ends of the insulating brackets 22 along the first direction. Both ends of the battery cells 31 extending into the first battery cell holes 211 are respectively arranged in the corresponding second battery cell holes 221.

[0047] It can be understood that both ends of the battery cell usually need to form an electrical connection with corresponding electrical components. By arranging the insulating brackets 22 at both ends of the battery cell, after the electrical connection of the circuit is completed, the corresponding electrical components can be isolated from the heat conduction bracket 21, playing an insulating role on the one hand, and preventing the heat conduction bracket 21 from contacting the electrical components and causing the temperature of the electrical components to be too high and affecting the normal operation on the other hand.

[0048] In a further embodiment of the present application, please refer to Figure 4 、 Figure 5 shown, at least one outer side wall of the heat conduction bracket 21 is provided with a positioning groove 212, and the positioning groove 212 penetrates through both ends of the heat conduction bracket 21 along the first direction. Correspondingly, as Figure 4 and Figure 6As shown, a positioning protrusion 113 is provided at a position corresponding to the positioning groove 212 on the inner side wall of the second chamber 112 of the box body 1, and the positioning protrusion 113 is adapted to the positioning groove 212 and extends along the first direction, and a positioning fit is formed between the corresponding positioning protrusion 113 and the positioning groove 212. During assembly, the corresponding positioning protrusion 113 can be aligned with the positioning groove 212 first, and then the heat-conducting bracket 21 can be pushed into the second chamber 112 of the box body 1 along the first direction; after the assembly is completed, the positioning fit between the positioning protrusion 113 and the positioning groove 212 can also play a limiting role to prevent the heat-conducting bracket 21 from shaking relative to each other.

[0049] It should be noted that, in actual applications, the number of positioning protrusions 113 and positioning grooves 212 can be set according to assembly requirements, and the setting position of the positioning protrusion 113 is not limited to the left and right side walls and the bottom wall of the second chamber 112 as shown in FIG4 . The positioning protrusion 113 can also be set on the top wall of the second chamber 112, or the positioning protrusion 113 can be set only on one or two inner walls of the second chamber 112. The number and setting position of the positioning grooves 212 correspond to the positioning protrusion 113.

[0050] In a further embodiment of the present application, Figure 1 and Figure 7 As shown, the heat-conducting component 2 further includes two insulating end caps 23. The two insulating end caps 23 are respectively arranged at the two ends of the battery cell 31 in the first direction, and are respectively located on the side of the corresponding insulating bracket 22 away from the heat-conducting bracket 21. Each insulating end cap 23 covers the side of the corresponding insulating bracket 22 away from the heat-conducting bracket 21, so as to insulate and isolate the end of the battery cell 31 from the shell and other components in the first direction. Through the insulating end caps 23, the insulating bracket 22 and the heat-conducting bracket 21, each battery cell 31 can be located in a relatively closed space to improve safety.

[0051] Among them, Figure 6 , Figure 7 and Figure 8 As shown, corresponding positions on the heat-conducting bracket 21, the insulating bracket 22 and the insulating end cover 23 are all provided with mounting holes 24 extending through along the first direction. Figure 10 As shown, a fixing screw 25 is passed through the mounting hole 24, and both ends of the fixing screw 25 are fixedly connected to the shell. On the one hand, it can make the connection between the heat-conducting component 2 and the box body 1 more firmly, and at the same time, it can also position and limit the heat-conducting bracket 21, the insulating bracket 22 and the insulating end cover 23 of the heat-conducting component 2 to prevent misalignment between them.

[0052] Further, the mounting holes 24 are arranged offset from the first battery cell holes 211 and the second battery cell holes 221 in the row direction and / or the column direction, so that the space between multiple first battery cell holes 211 and the space between multiple second battery cell holes 221 can be fully utilized to arrange the mounting holes 24, without increasing the end face area of the heat conducting bracket 21 and the insulating bracket 22, and the space utilization rate is higher.

[0053] It can be understood that the first battery cell holes 211 and the second battery cell holes 221 generally adopt a circular hole structure to be adapted to the cylindrical battery cells. When arranging multiple circular hole structures, the area between adjacent holes is usually difficult to be effectively utilized. In this embodiment, the mounting holes 24 are arranged in the area between adjacent first battery cell holes 211 and the area between adjacent second battery cell holes 221, which can effectively improve the space utilization rate.

[0054] It should be noted that the first battery cell holes 211 and the second battery cell holes 221 are not limited to Figure 4 the arrangement of three rows and five columns shown, and other arrangements can also be adopted according to needs. The arrangement of the mounting holes 24 is adapted to the first battery cell holes 211 and the second battery cell holes 221 to keep them arranged offset from the first battery cell holes 211 and the second battery cell holes 221.

[0055] In addition, in practical applications, in order to facilitate the setting of the electrical connection lines between the battery cells and the electrical components, corresponding wire passing holes can be provided on the insulating end cover 23 according to needs.

[0056] In a further embodiment of the present application, as Figure 9 , Figure 10 and Figure 11 , a flange structure 222 is provided at one end of the insulating bracket 22 away from the heat conducting part. The flange structure 222 is located at the side edge of the insulating bracket 22 and extends along the first direction; a plurality of first clamping structures 223 are provided on the outer side wall of the insulating bracket 22. Correspondingly, a first groove 231 is provided on the end face of one end of the insulating end cover 23 facing the heat conducting bracket 21. The first groove 231 is adapted to the flange structure 222, and the flange structure 222 extends into the first groove 231. Among them, a plurality of second clamping structures 232 are provided on the inner side wall of the insulating end cover 23. The second clamping structures 232 are arranged corresponding to the first clamping structures 223, and the connection and fixation between the insulating end cover 23 and the insulating bracket 22 are realized through the cooperation of the clamping parts between the first clamping structures 223 and the second clamping structures 232.

[0057] Further, among the first clamping structures 223 and the second clamping structures 232, one is a snap structure and the other is a slot structure. For example Figure 10 and Figure 11 in the examples, the first clamping structure 223 adopts a snap structure and the second clamping structure 232 adopts a slot structure.

[0058] Further, as in Figure 9 the example, the flange structure 222 is arranged in a circle along the circumferential direction of the insulating bracket 22, and the first clamping structures 223 are all arranged on the outer side wall of the flange structure 222 to facilitate cooperation with the second clamping structures 232 on the inner side wall of the first groove 231.

[0059] In a further embodiment of the present application, as in Figure 9 , Figure 10 and Figure 11 shown, the battery assembly 3 further includes a jumper 32, a switching power supply module 41, and at least one electronic control module 42. At least two battery cells 31 in the battery assembly 3 are connected in series or in parallel through the jumper 32 to supply power outward as needed. The switching power supply module 41 and the electronic control module 42 are both electrically connected to the battery cell 31. The switching power supply module 41 is used to control the input and output voltage of the battery assembly 3, and the electronic control module 42 is used to control the charging and discharging process of the battery assembly 3.

[0060] Further, the switching power supply module 41 adopts a DCDC power supply.

[0061] Further, the electronic control module 42 includes a battery management module 421 (BMS module) and an equalization management module 422.

[0062] In a further embodiment of the present application, as in Figure 10 and Figure 11 , the battery pack 100 further includes a temperature collector 43 and a heater 44. The temperature collector 43 is arranged in the box body 1, and the temperature collector 43 is electrically connected to the electronic control module 42; the temperature collector 43 is used to collect the temperature information in the box body 1 and can transmit the collected temperature information to the electronic control module 42. The heater 44 is arranged in the first chamber 111 and is fixedly connected to the box body 1 for heating the heat-conducting liquid in the first chamber 111; the heater 44 is electrically connected to the electronic control module 42 to control the operation of the heater 44 through the electronic control module 42.

[0063] Specifically, both the temperature collector 43 and the heater 44 are electrically connected to the battery management module 421. When the battery management module 421 detects that the temperature in the box body 1 is lower than the normal operating temperature of the battery assembly 3, it outputs a corresponding control instruction to control the operation of the heater 44 to heat the heat-conducting liquid in the first chamber 111, so that the heat of the heat-conducting liquid passes through the heat-conducting wall 114 and the heat-conducting component 2 to the battery cells 31 of the battery assembly 3 to heat and keep warm the battery cells 31.

[0064] Among them, the temperature collector 43 can be directly arranged on the battery management module 421 or can be arranged at other positions in the box body 1 suitable for collecting temperature information.

[0065] Further, as shown in Figure 11 and Figure 12 , the heater 44 specifically includes a plurality of electric heating tubes. One end of each electric heating tube is fixedly connected to the box body 1, and the other end extends into the first chamber 111 along the first direction.

[0066] In a further embodiment of the present application, as shown in Figure 1 , Figure 2 and Figure 11 and Figure 12 , the box body 1 specifically includes a main box shell 11 and at least one outer box cover 12. A heat-conducting wall body 114 is provided inside the main box shell 11, and the heat-conducting wall body 114 divides the internal space of the main box shell 11 into a first chamber 111 and a second chamber 112; wherein, at least one end of the main box shell 11 in the first direction is a through structure. Correspondingly, the outer box cover 12 is detachably connected to one end of the main box shell 11 that is through in the first direction. The outer box cover 12 abuts against the heat-conducting wall body 114, and a sealing structure 122 is provided at the connection between the outer box cover 12 and the heat-conducting wall body 114 and the main box shell 11, so that the first chamber 111 and the second chamber 112 form independent sealed chambers to prevent the heat-conducting liquid in the first chamber 111 from leaking. The sealing structure 122 can specifically adopt a gasket.

[0067] Further, as shown in the examples in Figure 11 and Figure 12 , both ends of the main box shell 11 in the first direction are through structures, and both ends of the first chamber 111 and the second chamber 112 in the first direction are also correspondingly through; one outer box cover 12 is respectively connected to both ends of the main box shell 11 in the first direction to cover the main box shell 11 and the first chamber 111 and the second chamber 112 at both ends. The heat-conducting component 2 and the battery component 3 can be loaded into or taken out from any end of the main box shell 11, which is convenient for assembly and disassembly.

[0068] Please refer to Figures 1 to 12 . In an embodiment of the present application, a battery pack 100 is provided, including a box body 1, a heat-conducting component 2, a battery component 3, a switching power supply module 41, a battery management module 421, a balancing management module 422, a temperature collector 43, and a heater 44.

[0069] As shown in Figure 1 , Figure 2 and Figure 11 and Figure 12As shown in the figure, the box body 1 specifically includes a main box shell 11 and two outer box covers 12. A heat-conducting wall 114 is provided inside the main box shell 11, and the heat-conducting wall 114 divides the internal space of the main box shell 11 into a first chamber 111 and a second chamber 112, with the first chamber 111 located above the second chamber 112. Among them, both ends of the main box shell 11 in the first direction are through structures. Correspondingly, the two outer box covers 12 are respectively arranged at both ends of the main box shell 11 in the first direction and are detachably connected to the main box shell 11. Sealing structures 122 are provided at the joints of the outer box covers 12 with the heat-conducting wall 114 and the main box shell 11, and the outer box covers 12 are in contact with the heat-conducting wall 114 so that the first chamber 111 and the second chamber 112 form independent sealed chambers. The first chamber 111 is used to accommodate the heat-conducting liquid, and the second chamber 112 is used to accommodate the battery assembly 3 and the heat-conducting assembly 2.

[0070] As Figure 1 and Figure 4 shown in the figure, the heat-conducting assembly 2 includes a heat-conducting bracket 21, two insulating brackets 22 and two insulating end caps 23. A plurality of first battery cell holes 211 are formed in the heat-conducting bracket 21, and each first battery cell hole 211 penetrates through both ends of the heat-conducting bracket 21 in the first direction; a battery cell 31 is inserted into each first battery cell hole 211, and both ends of the battery cell 31 extend out from both ends of the first battery cell hole 211 respectively. The two insulating brackets 22 are respectively arranged at both ends of the heat-conducting bracket 21 in the first direction and are both connected to the heat-conducting bracket 21; a plurality of second battery cell holes 221 corresponding to the first battery cell holes 211 are provided on the insulating brackets 22, and the second battery cell holes 221 penetrate through both ends of the insulating brackets 22 in the first direction. The two ends of the battery cell 31 extending into the first battery cell hole 211 are respectively inserted into the corresponding second battery cell holes 221. Among them, heat-conducting silicone grease is filled between the outer side surface of the battery cell 31 and the hole wall of the first battery cell hole 211, and heat-conducting silicone grease is also filled between the outer side surface of the heat-conducting bracket 21 and the chamber wall of the second chamber 112.

[0071] As Figure 1 and Figure 7 shown in the figure, the two insulating end caps 23 are respectively arranged at both ends of the battery cell 31 in the first direction and are respectively located on the side of the corresponding insulating bracket 22 away from the heat-conducting bracket 21, and each insulating end cap 23 covers the side of the corresponding insulating bracket 22 away from the heat-conducting bracket 21. As Figure 9 , Figure 10 and Figure 11, a circumferential edge of one end of the insulating bracket 22 away from the heat conduction has a flange structure 222, and the flange structure 222 extends along the first direction; a plurality of first clamping structures 223 are arranged at intervals along the circumferential direction on the outer side wall of the flange structure 222, and the first clamping structures 223 are in the form of buckles. Correspondingly, a first groove 231 is provided on an end surface of one end of the insulating end cover 23 facing the heat conduction bracket 21, and the first groove 231 is adapted to the flange structure 222, and the flange structure 222 extends into the first groove 231. Among them, a plurality of second clamping structures 232 are provided on the inner side wall of the insulating end cover 23, the second clamping structures 232 are in the form of clamping grooves, and are correspondingly arranged with the first clamping structures 223, and a clamping part fit is formed between the corresponding first clamping structures 223 and the second clamping structures 232, so that the insulating end cover 23 and the insulating bracket 22 are fixedly connected.

[0072] As Figure 4 , Figure 5 shown, a plurality of positioning grooves 212 are arranged at intervals along the circumferential direction on the outer side wall of the heat conduction bracket 21, and each positioning groove 212 penetrates through both ends of the heat conduction bracket 21 along the first direction. Correspondingly, as Figure 4 and Figure 6 shown, a plurality of positioning protrusions 113 are provided at positions corresponding to the positioning grooves 212 on the inner side wall of the second chamber 112 of the main box shell 11, the positioning protrusions 113 are adapted to the positioning grooves 212 and extend along the first direction, and a positioning fit is formed between the corresponding positioning protrusions 113 and the positioning grooves 212. Among them, a first bolt hole 115 is opened on the end surface of each positioning protrusion 113 in the first direction, a protruding structure extending along the first direction is also provided on the inner wall surface of the first chamber 111, and the end surface of the protruding structure has a first bolt hole 115, and a second bolt hole 121 is provided at the corresponding position on the outer box cover 12, and the main box shell 11 and the outer box cover 12 are connected by bolts.

[0073] As Figure 6 , Figure 7 and Figure 8 shown, mounting holes 24 penetrating through in the first direction are opened at corresponding positions on the heat conduction bracket 21, the insulating bracket 22 and the insulating end cover 23. Correspondingly, as Figure 10 shown, a fixing screw 25 is inserted through the mounting hole 24, and both ends of the fixing screw 25 are threadedly connected to corresponding screw holes on the outer box cover 12. Among them, a plurality of first battery cell holes 211 and a plurality of second battery cell holes 221 are arranged in three rows and five columns, a plurality of the mountings are arranged in two rows and four columns, and the mounting holes 24 are misaligned with the first battery cell holes 211 and the second battery cell holes 221 in both the row direction and the column direction.

[0074] As Figures 9 to 11As shown in the figure, multiple battery cells 31 in the battery assembly 3 are connected in series through connection plates 32. The switching power supply module 41 specifically uses a DCDC power supply and is electrically connected to the battery cells 31 to control the input and output voltage of the battery assembly 3; both the battery management module 421 (BMS module) and the equalization management module 422 are electrically connected to the battery cells 31 to perform corresponding control on the charging and discharging process of the battery assembly 3. The temperature collector 43 is arranged on the battery management module 421, and the temperature collector 43 is electrically connected to the battery management module 421; the temperature collector 43 is used to collect the temperature information inside the box body 1 and can transmit the collected temperature information to the battery management module 421. The heater 44 is arranged in the first chamber 111 and is fixedly connected to the outer box cover 12 of the box body 1; the heater 44 specifically includes two electric heating tubes, and the heater 44 is electrically connected to the battery management module 421 to heat the heat-conducting liquid in the first chamber 111 under the control of the battery management module 421.

[0075] In practical applications, the first chamber 111 of the box body 1 contains a heat-conducting liquid, such as water, coolant, etc. During the operation of the battery assembly 3, the heat generated by the battery cells 31 in the second chamber 112 can be sequentially transferred to the first chamber 111 through the heat-conducting bracket 21 and the heat-conducting wall 114, and exchange heat with the heat-conducting liquid. The heat-conducting liquid transfers the heat to the box body 1 again and then diffuses outwards, realizing the heat dissipation and temperature reduction of the battery cells 31. When it is detected that the temperature inside the box body 1 is lower than the normal operating temperature of the battery assembly 3, the battery management module 421 outputs corresponding control instructions to control the heater 44 to work, so as to heat the heat-conducting liquid in the first chamber 111, so that the heat of the heat-conducting liquid passes through the heat-conducting wall 114 and the heat-conducting component 2 to the battery cells 31 of the battery assembly 3, playing a role in heating and heat preservation for the battery cells 31.

[0076] The overall structure of the battery pack 100 in this embodiment is simple, without the need to set up a dedicated external circulation system, avoiding the risk of pipeline leakage, reducing energy consumption, and having a relatively low cost. At the same time, the battery pack 100 has high safety, and overall meets the requirements of the IP6 protection level, and is suitable for applications in places with high explosion-proof requirements such as underground and tunnels.

[0077] In the embodiment of the second aspect of the present application, an electrical device is provided, such as Figure 1 、 Figure 2 and Figure 13 As shown in the figure, the electrical device includes the battery pack 100 in any one of the above-mentioned first aspect embodiments to supply power to the electrical device through the battery pack 100; during the operation of the battery pack 100, the heat generated by the battery cells 31 of the battery assembly 3 can be transferred to the first chamber 111 through the heat-conducting component 2 and the heat-conducting wall 114 and exchange heat with the heat-conducting liquid, thereby realizing the heat dissipation and temperature reduction of the battery cells 31.

[0078] Among them, the electrical equipment includes, but is not limited to, electric vehicles.

[0079] Furthermore, when the battery pack 100 is provided with the heater 44 in any of the above embodiments, when the temperature inside the box body 1 is lower than the normal operating temperature of the battery assembly 3, the heater 44 can be used to heat the heat-conducting liquid in the first chamber 111, and then the heat of the heat-conducting liquid is transferred to the battery cell 31 through the heat-conducting wall 114 and the heat-conducting assembly 2, so as to heat and keep warm the battery cell 31.

[0080] In addition, the electrical equipment in this embodiment has all the beneficial effects of the battery pack 100 in any of the above embodiments, which will not be elaborated here.

[0081] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, according to the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A battery pack, characterized in that, Comprising: A box body, within which a first chamber and a second chamber are provided. The first chamber and the second chamber are separated by a heat-conducting wall body. The first chamber is used for accommodating a heat-conducting liquid. A heat-conducting component, which is arranged in the second chamber. A plurality of first battery cell holes are provided inside the heat-conducting component, and the heat-conducting component is in heat-conducting connection with the chamber wall of the second chamber. And a battery component, including a plurality of battery cells. Each battery cell is arranged in a corresponding first battery cell hole and is in heat-conducting connection with the hole wall of the corresponding first battery cell hole, so that the battery cell can exchange heat with the heat-conducting liquid in the first chamber through the heat-conducting component and the heat-conducting wall body.

2. The battery pack according to claim 1, wherein One battery cell is correspondingly arranged in each first battery cell hole.

3. The battery pack according to claim 1 or 2, wherein The heat-conducting component includes: A heat-conducting support, on which a plurality of the first battery cell holes are formed, and each first battery cell hole penetrates through both ends of the heat-conducting support along a first direction. And two insulating supports, which are respectively connected to both ends of the heat-conducting support in the first direction. A plurality of second battery cell holes penetrating along the first direction are provided on each insulating support, and each second battery cell hole is correspondingly arranged with one of the first battery cell holes. Wherein, both ends of each battery cell extend out of the first battery cell hole and respectively penetrate through the corresponding second battery cell holes.

4. The battery pack according to claim 3, wherein At least one outer side wall of the heat-conducting support is provided with a positioning groove, and the positioning groove penetrates through both ends of the heat-conducting support along the first direction. A positioning protrusion adapted to the positioning groove is provided on the inner side wall of the second chamber. The positioning protrusion extends along the first direction and forms a positioning fit with the corresponding positioning groove.

5. The battery pack according to claim 3, wherein The heat-conducting component further includes two insulating end caps, which are respectively arranged at both ends of the battery cell in the first direction and cover one end of the corresponding insulating support away from the heat-conducting support. Mounting holes are provided at corresponding positions on the heat-conducting support, the insulating support and the insulating end caps. The mounting holes penetrate along the first direction, and fixing screws are inserted into the mounting holes. Both ends of the fixing screws are fixedly connected to the box body respectively. Wherein, the mounting holes are arranged in a staggered manner with the first battery cell holes and the second battery cell holes in the row direction and / or the column direction.

6. The battery pack according to claim 5, wherein A flange structure is provided at the edge of one end of the insulating support away from the heat-conducting support. The flange structure extends along the first direction, and a plurality of first clamping structures are provided on the outer side wall of the insulating support in the circumferential direction. A first groove is provided on the end face of one end of the insulating end cap facing the heat-conducting support. A plurality of second clamping structures adapted to the first clamping structures are provided on the inner side wall of the first groove. The flange structure extends into the first groove, and the first clamping structures are clamped and fixed with the corresponding second clamping structures.

7. The battery pack according to claim 1 or 2, characterized in that at least two of the battery cells are connected in series or in parallel by a connecting piece; the battery pack further includes a switching power supply module and at least one electronic control module, and the switching power supply module and the electronic control module are electrically connected to the battery cells; wherein, the switching power supply module is used to control the input and output voltage of the battery assembly, and the electronic control module is used to control the charging and discharging process of the battery assembly.

8. The battery pack according to claim 7, characterized in that, It further includes: a temperature collector, which is arranged in the box body and is used to collect the temperature information in the box body. The temperature collector is electrically connected to the electronic control module and can transmit the collected temperature information to the electronic control module; and a heater, which is arranged in the first chamber and is fixedly connected to the box body. The heater is electrically connected to the electronic control module to heat the heat-conducting liquid in the first chamber under the control of the electronic control module.

9. The battery pack according to claim 1 or 2, characterized in that the box body includes: a main box shell, in which the heat-conducting wall body is arranged. The heat-conducting wall body divides the main box shell into the first chamber and the second chamber, and at least one end of the main box shell in the first direction is a through structure; at least one outer box cover, which is arranged at one end of the main box shell that is through in the first direction and is detachably connected to the main box shell. The outer box cover abuts against the heat-conducting wall body, and sealing structures are provided at the joints of the outer box cover with the heat-conducting wall body and with the main box shell, so that the first chamber and the second chamber form independent sealed chambers.

10. An electrical device, characterized in that, It includes: the battery pack according to any one of claims 1 to 9.

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