Battery pack and electric device

Abstract

A battery pack and an electric device. The battery pack comprises: a case, wherein a first chamber and a second chamber separated by a heat conducting wall are formed in the case, and the first chamber is used for accommodating a heat conducting liquid; a heat conducting assembly arranged in the second chamber, wherein a plurality of first cell holes are formed inside the heat conducting assembly, and the heat conducting assembly is in thermally conductive connection with the wall of the second chamber; and a battery assembly comprising a plurality of cells, wherein each cell is arranged in the corresponding first cell hole and is in thermally conductive connection with the hole wall of the corresponding first cell hole, such that the cell can exchange heat with the heat conducting liquid. A closed case structure is used, and the heat conducting liquid and the heat conducting assembly in the case are used to exchange heat with the cells, such that heat generated by the cells is dissipated to the outside by means of the heat conducting liquid and the case. The battery pack does not need to be provided with a special external circulation system, thereby avoiding the risk of liquid leakage of tubes, reducing energy consumption, involving low costs, and achieving a high protection level.

Description

Battery packs and electrical equipment Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] Currently, the heat generation problem during battery charging and discharging has been a bottleneck issue plaguing the battery industry, especially for battery packs or arrays with high capacitance. If the heat generated during battery use cannot be dissipated in time, the battery operating temperature will become too high, easily leading to a reduction in battery performance efficiency and lifespan, and even damage to the battery or related equipment. Existing battery products mainly use air cooling, water cooling, and air conditioning cooling methods for heat dissipation. Among them, water cooling and air conditioning cooling require the configuration of complex cooling circulation systems that are connected to the internal cooling pipes of the battery to exchange heat and cool the battery internally by pumping circulating coolant. However, the above heat dissipation methods are complex in structure, occupy a large space, have high system energy consumption, and have high equipment costs. The internal and external connections of the battery are connected by pipes, making it difficult to achieve a high level of protection, and there is also a risk of leakage at the pipe connections, posing a safety hazard. Application content

[0003] This application mainly provides a battery pack and electrical equipment to solve the problems of complex structure, large space occupation and energy consumption, leakage risk in pipelines, high equipment cost and difficulty in achieving a high protection level in the prior art battery heat dissipation system.

[0004] According to a first aspect, one embodiment provides a battery pack, comprising: a housing, the housing having a first chamber and a second chamber, the first chamber and the second chamber being separated by a thermally conductive wall, the first chamber being used to contain a thermally conductive liquid; a thermally conductive assembly disposed within the second chamber, the thermally conductive assembly having a plurality of first cell holes inside, and the thermally conductive assembly being thermally connected to the cavity wall of the second chamber; and a battery assembly comprising a plurality of cells, each cell being disposed in a corresponding first cell hole and thermally connected to the hole wall of the corresponding first cell hole, so that the cell can exchange heat with the thermally conductive liquid in the first chamber through the thermally conductive assembly and the thermally conductive wall.

[0005] In a further embodiment of this application, a battery cell is disposed in each first battery cell hole.

[0006] In a further embodiment of this application, the heat-conducting component includes: a heat-conducting bracket having a plurality of first battery cell holes, each of which penetrates 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, each of which has a plurality of second battery cell holes penetrating along the first direction, and each second battery cell hole corresponding to one of the first battery cell holes; wherein both ends of each battery cell extend out from the first battery cell hole and pass through the corresponding second battery cell hole.

[0007] In a further embodiment of this application, at least one outer side wall of the heat-conducting bracket is provided with a positioning groove, the positioning groove extending through both ends of the heat-conducting bracket in a first direction; the inner side wall of the second chamber is provided with a positioning protrusion adapted to the positioning groove, the positioning protrusion extending in the first direction and forming a positioning fit with the corresponding positioning groove.

[0008] In a further embodiment of this application, the heat-conducting assembly further includes two insulating end caps, which are respectively disposed at both ends of the battery cell in the first direction and cover the 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 caps, the mounting holes are through the first direction, and fixing screws are inserted through the mounting holes, the two ends of the fixing screws are respectively fixedly connected to the housing; wherein, the mounting holes are offset from the first battery cell hole and the second battery cell hole in the row direction and / or column direction.

[0009] In a further embodiment of this application, the edge of the insulating bracket away from the heat-conducting bracket is provided with a flange structure, the flange structure extends along a first direction, and the insulating bracket is provided with a plurality of first snap-fit ​​structures on the outer side wall in the circumferential direction; the end face of the insulating end cap facing the heat-conducting bracket is provided with a first groove, and the inner side wall of the first groove is provided with a plurality of second snap-fit ​​structures adapted to the first snap-fit ​​structures, the flange structure extends into the first groove, and the first snap-fit ​​structure is snap-fitted and fixed with the corresponding second snap-fit ​​structure.

[0010] In a further embodiment of this application, at least two battery cells are connected in series or in parallel via an adapter plate; the battery pack also includes a switching power supply module and at least one electronic control module, the switching power supply module and the electronic control module being 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.

[0011] In a further embodiment of this application, the battery pack further includes: a temperature acquisition device disposed inside the housing for acquiring temperature information inside the housing, the temperature acquisition device being electrically connected to the electronic control module and capable of transmitting the acquired temperature information to the electronic control module; and a heater disposed in the first chamber and fixedly connected to the housing, the heater being 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 this application, the housing includes: a main housing shell, a heat-conducting wall inside the main housing shell, the heat-conducting wall dividing the main housing shell into a first chamber and a second chamber, and at least one end of the main housing shell in a first direction is a through structure; at least one outer housing cover, disposed at the through end of the main housing shell in the first direction and detachably connected to the main housing shell, the outer housing cover abutting against the heat-conducting wall, and the connection between the outer housing cover and the heat-conducting wall and the main housing shell is provided with a sealing structure, so that the first chamber and the second chamber form mutually independent sealed chambers.

[0013] According to a second aspect, one embodiment provides an electrical device including the battery pack of any of the embodiments of the first aspect described above.

[0014] According to the battery pack of the above embodiment, by adopting a closed box structure and utilizing the heat-conducting liquid and heat-conducting components inside the box to exchange heat with the battery cells, the battery cells can transfer the heat generated to the heat-conducting liquid in the first chamber through the heat-conducting bracket and heat-conducting wall, and then dissipate it to the outside through the box, thereby achieving heat dissipation of the battery cells. The overall structure of the battery pack is simple, and there is no need to set up a special external circulation system, which avoids the risk of pipeline leakage, reduces energy consumption, and is lower in cost than common liquid cooling and air cooling heat dissipation devices. It can also achieve a high protection level, which is beneficial for application in places with high explosion-proof requirements such as underground mines and tunnels. Attached Figure Description

[0015] Figure 1 is a partially exploded view of a battery pack in one embodiment of this application;

[0016] Figure 2 is a schematic diagram of the structure of a battery pack in one embodiment of this application;

[0017] Figure 3 is a schematic diagram of the internal structure of a battery pack in one embodiment of this application;

[0018] Figure 4 is a schematic diagram of the internal structure of the battery pack in Figure 3 from another perspective;

[0019] Figure 5 is a schematic diagram of the heat-conducting component and the battery cell in one embodiment of this application;

[0020] Figure 6 is a schematic diagram of the main housing in one embodiment of this application;

[0021] Figure 7 is a schematic diagram of the heat-conducting component in the assembled state according to one embodiment of this application;

[0022] Figure 8 is a schematic diagram of a heat-conducting bracket in one embodiment of this application;

[0023] Figure 9 is a schematic diagram of some heat-conducting components and battery cells in one embodiment of this application;

[0024] Figure 10 is a schematic diagram of the disassembled state of the battery pack in one embodiment of this application;

[0025] Figure 11 is a partial structural decomposition diagram of a battery pack in one embodiment of this application from another perspective.

[0026] Figure 12 is a cross-sectional view of a battery pack in one embodiment of this application;

[0027] Figure 13 is a schematic block diagram of an electrical device in one embodiment of this application.

[0028] In the above-mentioned figure, arrow F1 indicates the first direction.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 battery pack;

[0031] 1. Box body, 11. Main box shell, 111. First chamber, 112. Second chamber, 113. Positioning protrusion, 114. Heat-conducting wall, 115. First bolt hole, 12. Outer box cover, 121. Second bolt hole, 122. Sealing structure.

[0032] 2. Thermal conductive component, 21. Thermal conductive bracket, 211. First cell hole, 212. Positioning groove, 22. Insulating bracket, 221. Second cell hole, 222. Flange structure, 223. First snap-fit ​​structure, 23. Insulating end cap, 231. First groove, 232. Second snap-fit ​​structure, 24. Mounting hole, 25. Fixing screw.

[0033] 3 Battery assembly, 31 Battery cell, 32 Adapter plate; 41 Switching power supply module, 42 Electronic control module, 421 Battery management module, 422 Balance management module, 43 Temperature acquisition device, 44 Heater.

[0034] 500 electrical equipment. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0036] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0037] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0038] In this embodiment, a closed enclosure is divided into two independent chambers—a first chamber and a second chamber—by a thermally conductive wall. The first chamber contains a thermally conductive liquid, and the second chamber contains a thermally conductive component that is thermally connected to the chamber wall. Multiple battery cells are housed in the first cell hole of the thermally conductive component, with the cells thermally connected to the hole wall. This allows for heat exchange between the thermally conductive liquid in the first chamber, the thermally conductive wall, and the thermally conductive component and the battery cells. The generated heat from the battery cells is sequentially conducted to the thermally conductive liquid in the first chamber through the thermally conductive support and the thermally conductive wall, and then dissipated to the outside through the enclosure, achieving uniform heat dissipation for the battery cells. The overall battery pack structure is simple, eliminating the need for a dedicated external circulation system, avoiding the risk of pipeline leakage, reducing energy consumption, and lowering costs. Furthermore, the battery pack offers high safety, achieving a high protection level, which is beneficial for applications in locations with high explosion-proof requirements, such as underground mines and tunnels.

[0039] An embodiment of the first aspect of this application provides a battery pack 100. As shown in Figures 1, 2, and 3, the battery pack 100 includes a housing 1, a heat-conducting component 2, and a battery assembly 3. The housing 1 has a closed first chamber 111 and a second chamber 112, separated by a heat-conducting wall 114. The heat-conducting component 2 and the battery assembly 3 are disposed in the second chamber 112, and the first chamber 111 is used to contain a heat-conducting liquid. The housing 1 may be assembled from multiple modular structures, as shown in Figure 1, to allow for disassembly and assembly. After assembly, the first chamber 111 and the second chamber 112 are independent closed chambers. The heat-conducting component 2 has multiple first cell holes 211, and is thermally connected to the wall of the second chamber 112. The battery assembly 3 includes multiple battery cells 31, each battery cell 31 being disposed in a corresponding first battery cell hole 211 and thermally connected to the hole wall of the first battery cell hole 211 of the heat-conducting assembly 2, enabling heat conduction between the battery cell 31, the heat-conducting assembly 2, the heat-conducting wall 114, and the housing 1. During use, the heat generated by the operation of the battery cell 31 can be transferred sequentially through the heat-conducting assembly 2 and the heat-conducting wall 114 to the first chamber 111, where it exchanges heat with the heat-conducting liquid, thereby achieving heat dissipation and cooling of the battery cell 31.

[0040] It is understandable that in practical applications, since heat is transferred from the side with higher temperature to the side with lower temperature, when the temperature of the battery cell 31 is lower than the temperature of the heat-conducting liquid, the heat of the heat-conducting liquid can also be transferred to the battery cell 31 through the heat-conducting wall 114 and the heat-conducting component 2 to keep the battery cell 31 warm.

[0041] It should be noted that the thermally conductive component 2 and the cavity wall of the second chamber 112 can form a thermally conductive connection through direct contact, or a thermally conductive medium can be filled to form a thermally conductive connection, such as thermally conductive silicone grease between the thermally conductive component 2 and the cavity of the second chamber 112. Similarly, the battery cell 31 and the hole wall of the first battery cell hole 211 can form a thermally conductive connection through direct contact, or a thermally conductive medium can be filled to form a thermally conductive connection, such as thermally conductive silicone grease between the battery cell 31 and the hole wall of the first battery cell hole 211. Thermally conductive liquids include, but are not limited to, water and coolant.

[0042] In addition, the arrangement of the first chamber 111 and the second chamber 112 is not limited to the arrangement shown in Figure 1 (i.e., the first chamber 111 is located above the second chamber 112). Other arrangements can also be adopted according to the needs of use, such as the first chamber 111 being located below the second chamber 112, or the first chamber 111 and the second chamber 112 being arranged horizontally, or the first chamber 111 being arranged around the second chamber 112, etc., which can also achieve the heat exchange effect.

[0043] In a further embodiment of this application, as shown in FIG4, the battery cell 31 corresponds one-to-one with the first battery cell hole 211, and one battery cell 31 is disposed in each first battery cell hole 211, which can make reasonable use of space and facilitate assembly. In addition, only one battery cell 31 is disposed in each first battery cell hole 211, which also allows each battery cell 31 to exchange heat independently. Moreover, the contact area between a single battery cell 31 and the hole wall of the first battery cell hole 211 is large, resulting in higher heat exchange efficiency and making the heat temperature of each battery cell 31 in the battery assembly 3 relatively uniform.

[0044] In a further embodiment of this application, as shown in Figures 1 and 4, the heat-conducting assembly 2 includes a heat-conducting bracket 21 and two insulating brackets 22. The heat-conducting bracket 21 has multiple first battery cell holes 211, each of which extends through both ends of the heat-conducting bracket 21 along a first direction. A battery cell 31 passes through the corresponding first battery cell hole 211 along the first direction, with both ends of the battery cell 31 extending out from the ends of the first battery cell hole 211. The two insulating brackets 22 are respectively disposed at both ends of the heat-conducting bracket 21 in the first direction and are both connected to the heat-conducting bracket 21. The insulating bracket 22 has multiple second battery cell holes 221 corresponding to the first battery cell holes 211, and each of the second battery cell holes 221 extends through both ends of the insulating bracket 22 along the first direction. The two ends of the battery cell 31 extending into the first battery cell hole 211 pass through the corresponding second battery cell holes 221.

[0045] It is understandable that the two ends of the battery cell usually need to form an electrical connection with the corresponding electrical components. By setting the insulating brackets 22 at both ends of the battery cell, the corresponding electrical components are isolated from the heat-conducting brackets 21 after the circuit is electrically connected. On the one hand, it plays an insulating role, and on the other hand, it can prevent the heat-conducting brackets 21 from contacting the electrical components, which would cause the electrical components to overheat and affect normal operation.

[0046] In a further embodiment of this application, referring to Figures 4 and 5, at least one outer wall of the heat-conducting bracket 21 is provided with a positioning groove 212, and the positioning groove 212 extends through both ends of the heat-conducting bracket 21 along a first direction. Correspondingly, as shown in Figures 4 and 6, a positioning protrusion 113 is provided on the inner wall of the second chamber 112 of the housing 1 at a position corresponding to the positioning groove 212. The positioning protrusion 113 is adapted to the positioning groove 212 and extends along the first direction, forming a positioning fit 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 housing 1 along the first direction. After assembly, 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.

[0047] It should be noted that in practical applications, the number of positioning protrusions 113 and positioning grooves 212 can be set according to assembly needs. The location of the positioning protrusions 113 is not limited to the left and right side walls and bottom wall of the second chamber 112 as shown in 4. The positioning protrusions 113 can also be set on the top wall of the second chamber 112, or the positioning protrusions 113 can be set only on one or two inner walls of the second chamber 112. The number and location of the positioning grooves 212 correspond to the positioning protrusions 113.

[0048] In a further embodiment of this application, as shown in Figures 1 and 7, the heat-conducting assembly 2 further includes two insulating end caps 23. The two insulating end caps 23 are respectively disposed at both ends of the battery cell 31 in the first direction, and are located on the side of the corresponding insulating support 22 away from the heat-conducting support 21. Each insulating end cap 23 covers the side of the corresponding insulating support 22 away from the heat-conducting support 21, thereby providing insulation isolation between the end of the battery cell 31 and the housing and other components in the first direction. Through the insulating end caps 23, the insulating support 22, and the heat-conducting support 21, each battery cell 31 can be located in a relatively enclosed space, thereby improving safety.

[0049] As shown in Figures 6, 7, and 8, mounting holes 24 extending along the first direction are provided at corresponding positions on the heat-conducting bracket 21, the insulating bracket 22, and the insulating end cap 23. Correspondingly, as shown in Figure 10, fixing screws 25 are inserted into the mounting holes 24. The two ends of the fixing screws 25 are fixedly connected to the housing. On the one hand, this can make the connection between the heat-conducting component 2 and the housing 1 more secure. On the other hand, it can also position and limit the heat-conducting bracket 21, the insulating bracket 22, and the insulating end cap 23 of the heat-conducting component 2, preventing misalignment between them.

[0050] Furthermore, the mounting holes 24 are staggered with the first cell holes 211 and the second cell holes 221 in the row direction and / or column direction. This allows for full utilization of the space between the multiple first cell holes 211 and the multiple second cell holes 221 when arranging the mounting holes 24. This eliminates the need to increase the end face area of ​​the heat-conducting bracket 21 and the insulating bracket 22, resulting in higher space utilization.

[0051] It is understood that the first cell hole 211 and the second cell hole 221 are usually circular holes to fit cylindrical cells. However, when multiple circular holes are arranged, the area between adjacent holes is often difficult to utilize effectively. In this embodiment, the mounting holes 24 are set in the areas between adjacent first cell holes 211 and adjacent second cell holes 221, which can effectively improve space utilization.

[0052] It should be noted that the arrangement of the first cell hole 211 and the second cell hole 221 is not limited to the three-row, five-column arrangement shown in Figure 4, and other arrangements can be used as needed. The arrangement of the mounting holes 24 is adapted to the first cell hole 211 and the second cell hole 221 to maintain a staggered setting with respect to the first cell hole 211 and the second cell hole 221.

[0053] In addition, in practical applications, in order to facilitate the setting of electrical connection lines between the battery cell and electrical components, corresponding wire passage holes can be set on the insulating end cover 23 as needed.

[0054] In a further embodiment of this application, as shown in Figures 9, 10, and 11, the end of the insulating support 22 away from the heat-conducting structure is provided with a flange structure 222. The flange structure 222 is located at the side edge of the insulating support 22 and extends along a first direction. Multiple first snap-fit ​​structures 223 are provided on the outer side wall of the insulating support 22. Correspondingly, a first groove 231 is provided on the end face of the insulating end cap 23 facing the heat-conducting support 21. The first groove 231 is adapted to the flange structure 222, and the flange structure 222 extends into the first groove 231. Multiple second snap-fit ​​structures 232 are provided on the inner side wall of the insulating end cap 23. The second snap-fit ​​structures 232 are correspondingly arranged with the first snap-fit ​​structures 223, and the connection and fixation between the insulating end cap 23 and the insulating support 22 are achieved through the snap-fit ​​cooperation between the first snap-fit ​​structures 223 and the second snap-fit ​​structures 232.

[0055] Furthermore, in the first snap-fit ​​structure 223 and the second snap-fit ​​structure 232, one is a snap-fit ​​structure and the other is a slot structure. For example, in the examples in Figures 10 and 11, the first snap-fit ​​structure 223 adopts a snap-fit ​​structure and the second snap-fit ​​structure 232 adopts a slot structure.

[0056] Furthermore, as shown in the example in Figure 9, the flange structure 222 is arranged around the circumference of the insulating support 22, and the first snap-fit ​​structure 223 is arranged on the outer side wall of the flange structure 222 so as to cooperate with the second snap-fit ​​structure 232 on the inner side wall of the first groove 231.

[0057] In a further embodiment of this application, as shown in Figures 9, 10, and 11, the battery assembly 3 further includes an adapter plate 32, a switching power supply module 41, and at least one electronic control module 42. At least two cells 31 in the battery assembly 3 are connected in series or parallel via the adapter plate 32 to supply power as needed. Both the switching power supply module 41 and the electronic control module 42 are electrically connected to the cells 31. The switching power supply module 41 controls the input and output voltages of the battery assembly 3, and the electronic control module 42 controls the charging and discharging process of the battery assembly 3.

[0058] Furthermore, the switching power supply module 41 uses a DC-DC power supply.

[0059] Furthermore, the electronic control module 42 includes a battery management module 421 (BMS module) and a balance management module 422.

[0060] In a further embodiment of this application, as shown in Figures 10 and 11, the battery pack 100 further includes a temperature sensor 43 and a heater 44. The temperature sensor 43 is disposed inside the housing 1 and is electrically connected to the electronic control module 42; the temperature sensor 43 is used to collect temperature information inside the housing 1 and can transmit the collected temperature information to the electronic control module 42. The heater 44 is disposed inside the first chamber 111 and is fixedly connected to the housing 1, and is used to heat the heat-conducting liquid inside the first chamber 111; the heater 44 is electrically connected to the electronic control module 42 so that the electronic control module 42 can control the operation of the heater 44.

[0061] Specifically, the temperature acquisition device 43 and the heater 44 are both electrically connected to the battery management module 421. When the battery management module 421 detects that the temperature inside the housing 1 is lower than the normal operating temperature of the battery assembly 3, it outputs a corresponding control command 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 is transferred to the battery cell 31 of the battery assembly 3 through the heat-conducting wall 114 and the heat-conducting component 2, so as to heat and keep the battery cell 31 warm.

[0062] The temperature acquisition device 43 can be directly installed on the battery management module 421, or it can be installed in other suitable locations for collecting temperature information inside the housing 1.

[0063] Furthermore, as shown in Figures 11 and 12, the heater 44 specifically includes multiple electric heating tubes, one end of each electric heating tube is fixedly connected to the housing 1, and the other end extends into the first chamber 111 along the first direction.

[0064] In a further embodiment of this application, as shown in Figures 1, 2, 11, and 12, the housing 1 specifically includes a main housing shell 11 and at least one outer cover 12. The main housing shell 11 has a heat-conducting wall 114 inside, which divides the internal space of the main housing shell 11 into a first chamber 111 and a second chamber 112; wherein at least one end of the main housing shell 11 in a first direction is a through structure. Correspondingly, the outer cover 12 is detachably connected to the through end of the main housing shell 11 in the first direction, and the outer cover 12 abuts against the heat-conducting wall 114. Sealing structures 122 are provided at the connections between the outer cover 12, the heat-conducting wall 114, and the main housing shell 11, so that the first chamber 111 and the second chamber 112 form independent sealed chambers, preventing leakage of the heat-conducting liquid in the first chamber 111. The sealing structure 122 may specifically be a sealing gasket.

[0065] Furthermore, as shown in the examples in Figures 11 and 12, both ends of the main housing 11 in the first direction are through structures, and the two ends of the first chamber 111 and the second chamber 112 in the first direction are also through structures. An outer cover 12 is connected to each end of the main housing 11 in the first direction to seal the main housing 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 installed or removed from either end of the main housing 11, which is convenient for assembly and disassembly.

[0066] Please refer to Figures 1 to 12. In one embodiment of this application, a battery pack 100 is provided, including a housing 1, a heat-conducting component 2, a battery component 3, a switching power supply module 41, a battery management module 421, an equalization management module 422, a temperature acquisition device 43, and a heater 44.

[0067] As shown in Figures 1, 2, 11, and 12, the housing 1 specifically includes a main housing 11 and two outer covers 12. The main housing 11 has a heat-conducting wall 114 inside, which divides the internal space of the main housing 11 into a first chamber 111 and a second chamber 112, with the first chamber 111 located above the second chamber 112. The main housing 11 has through-type structures at both ends in the first direction. Correspondingly, the two outer covers 12 are respectively located at both ends of the main housing 11 in the first direction and are detachably connected to the main housing 11. Sealing structures 122 are provided at the connections between the outer covers 12 and the heat-conducting wall 114, and at the main housing 11. The outer covers 12 abut against 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 contain a heat-conducting liquid, and the second chamber 112 is used to contain the battery assembly 3 and the heat-conducting assembly 2.

[0068] As shown in Figures 1 and 4, the heat-conducting assembly 2 includes a heat-conducting bracket 21, two insulating brackets 22, and two insulating end caps 23. The heat-conducting bracket 21 has multiple first battery cell holes 211, each hole penetrating both ends of the heat-conducting bracket 21 along a first direction. A battery cell 31 passes through each first battery cell hole 211, with both ends of the battery cell 31 extending out from the two ends of the first battery cell hole 211. The two insulating brackets 22 are respectively located at both ends of the heat-conducting bracket 21 along the first direction and are connected to the heat-conducting bracket 21. The insulating brackets 22 have multiple second battery cell holes 221 corresponding to the first battery cell holes 211, each penetrating both ends of the insulating bracket 22 along the first direction. The two ends of the battery cell 31 extending into the first battery cell hole 211 pass through the corresponding second battery cell hole 221. Thermal grease is filled between the outer side of the battery cell 31 and the wall of the first battery cell hole 211, and thermal grease is also filled between the outer side of the thermally conductive bracket 21 and the wall of the second chamber 112.

[0069] As shown in Figures 1 and 7, two insulating end caps 23 are respectively disposed at both ends of the battery cell 31 in the first direction, and are respectively located on the side of the corresponding insulating support 22 away from the heat-conducting support 21. Each insulating end cap 23 covers the side of the corresponding insulating support 22 away from the heat-conducting support 21. As shown in Figures 9, 10 and 11, the circumferential edge of the end of the insulating support 22 away from the heat-conducting support is provided with a flange structure 222, and the flange structure 222 extends along the first direction; multiple first snap-fit ​​structures 223 are provided circumferentially at intervals on the outer wall of the flange structure 222, and the first snap-fit ​​structures 223 adopt the form of snap-fit. Correspondingly, the end face of the insulating end cap 23 facing the heat-conducting support 21 is provided with a first groove 231, which is adapted to the flange structure 222, and the flange structure 222 extends into the first groove 231. The inner wall of the insulating end cap 23 is provided with a plurality of second snap-fit ​​structures 232. The second snap-fit ​​structures 232 are in the form of slots and are correspondingly set with the first snap-fit ​​structures 223. The corresponding first snap-fit ​​structures 223 and the second snap-fit ​​structures 232 form a snap-fit ​​engagement to fix the insulating end cap 23 to the insulating bracket 22.

[0070] As shown in Figures 4 and 5, multiple positioning grooves 212 are spaced circumferentially on the outer wall of the heat-conducting bracket 21, and each positioning groove 212 extends through both ends of the heat-conducting bracket 21 in the first direction. Correspondingly, as shown in Figures 4 and 6, multiple positioning protrusions 113 are provided on the inner wall of the second chamber 112 of the main housing 11 at positions corresponding to the positioning grooves 212. The positioning protrusions 113 are adapted to the positioning grooves 212 and extend in the first direction, forming a positioning fit between the corresponding positioning protrusions 113 and positioning grooves 212. Each positioning protrusion 113 has a first bolt hole 115 on its end face in the first direction. The inner wall of the first chamber 111 also has a protrusion structure extending in the first direction, and the end face of the protrusion structure has a first bolt hole 115. The outer cover 12 has a corresponding second bolt hole 121. The main housing 11 and the outer cover 12 are connected by bolts.

[0071] As shown in Figures 6, 7, and 8, mounting holes 24 extending along the first direction are provided at corresponding positions on the heat-conducting bracket 21, the insulating bracket 22, and the insulating end cap 23. Correspondingly, as shown in Figure 10, fixing screws 25 are inserted into the mounting holes 24, and the two ends of the fixing screws 25 are threadedly connected to the corresponding screw holes on the outer casing 12. The multiple first cell holes 211 and multiple second cell holes 221 are arranged in three rows and five columns, and the multiple mounting holes are arranged in two rows and four columns. Furthermore, the mounting holes 24 are staggered from the first cell holes 211 and the second cell holes 221 in both the row and column directions.

[0072] As shown in Figures 9 to 11, multiple cells 31 in the battery assembly 3 are connected in series via adapter pieces 32. The switching power supply module 41 specifically uses a DC-DC power supply and is electrically connected to the cells 31 to control the input and output voltage of the battery assembly 3. The battery management module 421 (BMS module) and the equalization management module 422 are both electrically connected to the cells 31 to control the charging and discharging process of the battery assembly 3. A temperature sensor 43 is mounted on the battery management module 421 and is electrically connected to it; the temperature sensor 43 collects temperature information within the housing 1 and transmits the collected temperature information to the battery management module 421. A heater 44 is located within the first chamber 111 and is fixedly connected to the outer cover 12 of the housing 1; the heater 44 specifically includes two electric heating tubes and is electrically connected to the battery management module 421 to heat the heat-conducting liquid within the first chamber 111 under the control of the battery management module 421.

[0073] In practical applications, the first chamber 111 of the housing 1 contains a heat-conducting liquid, such as water or coolant. During the operation of the battery pack 3, the heat generated by the cells 31 in the second chamber 112 can be transferred sequentially to the first chamber 111 through the heat-conducting bracket 21 and the heat-conducting wall 114, where it exchanges heat with the heat-conducting liquid. The heat-conducting liquid then transfers the heat back to the housing 1, which then diffuses outward, thus cooling the cells 31. When the temperature inside the housing 1 is detected to be lower than the normal operating temperature of the battery pack 3, the battery management module 421 outputs a corresponding control command to control the heater 44 to operate, thereby heating the heat-conducting liquid in the first chamber 111. This allows the heat from the heat-conducting liquid to be transferred through the heat-conducting wall 114 and the heat-conducting component 2 to the cells 31 of the battery pack 3, thus providing heating and insulation for the cells 31.

[0074] The battery pack 100 in this embodiment has a simple overall structure, does not require a dedicated external circulation system, avoids the risk of pipeline leakage, reduces energy consumption, and has a low cost. At the same time, the battery pack 100 has high safety, meets the requirements of IP6 protection level, and is suitable for use in places with high explosion protection requirements such as underground mines and tunnels.

[0075] An embodiment of the second aspect of this application provides an electrical device, as shown in Figures 1, 2 and 13. The electrical device includes the battery pack 100 in any embodiment of the first aspect described above, so as 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 cell 31 of the battery assembly 3 can be transferred to the first chamber 111 through the heat-conducting wall 114 of the heat-conducting component 2, and exchange heat with the heat-conducting liquid, thereby achieving heat dissipation and cooling of the battery cell 31.

[0076] Electrical equipment includes, but is not limited to, electric vehicles.

[0077] Furthermore, when the battery pack 100 is equipped with a heater 44 in any of the above embodiments, the heater 44 can also heat the heat-conducting liquid in the first chamber 111 when the temperature inside the housing 1 is lower than the normal operating temperature of the battery assembly 3, thereby allowing the heat of the heat-conducting liquid to be transferred to the battery cell 31 through the heat-conducting wall 114 and the heat-conducting component 2, so as to heat and keep the battery cell 31 warm.

[0078] Furthermore, the electrical device in this embodiment has all the beneficial effects of the battery pack 100 in any of the above embodiments, which will not be repeated here.

[0079] This document describes various exemplary embodiments with reference to them. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope of this document. For example, various operational steps and components for performing operational steps can be implemented in different ways depending on the specific application or considering any number of cost functions associated with the operation of the system (e.g., one or more steps can be deleted, modified, or combined with other steps).

[0080] While the principles herein have been illustrated in various embodiments, numerous modifications to the structure, arrangement, proportions, elements, materials, and components, particularly suited to specific environmental and operational requirements, may be used without departing from the principles and scope of this disclosure. These modifications and other alterations or alterations will be included within the scope of this document.

[0081] The foregoing specific descriptions have been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of this disclosure. Therefore, considerations for this disclosure are to be illustrative rather than restrictive, and all such modifications are to be included within its scope. Similarly, advantages, other advantages, and solutions to problems with respect to various embodiments have been described above. However, benefits, advantages, solutions to problems, and any elements that produce these, or make them more explicit, should not be construed as critical, essential, or necessary. The term “comprising” and any other variations thereof as used herein are non-exclusive inclusion, meaning that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or not part of the process, method, system, article, or apparatus. Furthermore, the term “coupled” and any other variations thereof as used herein refer to physical connections, electrical connections, magnetic connections, optical connections, communication connections, functional connections, and / or any other connections.

[0082] Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the basic principles of this application. Therefore, the scope of this application should be determined according to the following claims.

Claims

1. A battery pack, characterized in that, include: The enclosure has a first chamber and a second chamber, which are separated by a heat-conducting wall. The first chamber is used to contain a heat-conducting liquid. A heat-conducting component is disposed in the second chamber. The heat-conducting component has multiple first cell holes inside, and the heat-conducting component is thermally connected to the cavity wall of the second chamber. The battery assembly includes multiple battery cells, each of which is disposed in a corresponding first battery cell hole and is thermally connected to the hole wall of the corresponding first battery cell hole, so that the battery cell can exchange heat with the thermally conductive liquid in the first chamber through the thermally conductive assembly and the thermally conductive wall.

2. The battery pack according to claim 1, characterized in that, One battery cell is provided in each of the first battery cell holes.

3. The battery pack according to claim 1 or 2, characterized in that, The thermally conductive component includes: A heat-conducting bracket, wherein a plurality of first battery cell holes are provided on the heat-conducting bracket, and each first battery cell hole penetrates both ends of the heat-conducting bracket along a first direction; And two insulating brackets, respectively connected to the two ends of the heat-conducting bracket in the first direction, each of the insulating brackets is provided with a plurality of second cell holes that penetrate along the first direction, and each second cell hole is corresponding to one of the first cell holes; Each of the battery cells has two ends extending from the first battery cell hole and passing through the corresponding second battery cell hole.

4. The battery pack according to claim 3, characterized in that, At least one outer wall of the heat-conducting bracket is provided with a positioning groove, and the positioning groove extends through both ends of the heat-conducting bracket in a first direction. The inner wall of the second chamber is provided with a positioning protrusion that matches the positioning groove. 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, characterized in that, The heat-conducting component also includes two insulating end caps, which are respectively disposed at both ends of the battery cell in the first direction and cover the end of the corresponding insulating support away from the heat-conducting support. Mounting holes are provided at corresponding positions on the heat-conducting bracket, the insulating bracket, and the insulating end cap. The mounting holes are through in the first direction, and fixing screws are inserted in the mounting holes. The two ends of the fixing screws are respectively fixedly connected to the housing. The mounting holes are offset from the first cell hole and the second cell hole in the row direction and / or column direction.

6. The battery pack according to claim 5, characterized in that, The edge of the insulating bracket away from the heat-conducting bracket is provided with a flange structure, the flange structure extends along a first direction, and the insulating bracket is provided with a plurality of first snap-fit ​​structures on the outer side wall in the circumferential direction. The insulating end cap has a first groove on one end face facing the heat-conducting bracket. The inner wall of the first groove has a plurality of second snap-fit ​​structures adapted to the first snap-fit ​​structure. The flange structure extends into the first groove, and the first snap-fit ​​structure is snap-fitted and fixed with the corresponding second snap-fit ​​structure.

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 via an adapter plate; The battery pack further includes a switching power supply module and at least one electronic control module, wherein 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, Also includes: A temperature acquisition device is installed inside the enclosure to collect temperature information inside the enclosure. The temperature acquisition device is electrically connected to the electronic control module and can transmit the collected temperature information to the electronic control module. A heater is disposed in the first chamber and fixedly connected to the housing. 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 enclosure includes: The main housing has a heat-conducting wall inside, which divides the main housing into a first chamber and a second chamber, and at least one end of the main housing in a first direction is a through structure. At least one outer cover is provided at one end of the main housing in a first direction and is detachably connected to the main housing. The outer cover abuts against the heat-conducting wall, and the connection between the outer cover and the heat-conducting wall, as well as the connection with the main housing, is provided with a sealing structure so that the first chamber and the second chamber form mutually independent sealed chambers.

10. An electrical appliance, characterized in that, include: The battery pack as described in any one of claims 1 to 9.

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