A cell assembly, a battery pack, and an electrical device.

Abstract

This utility model provides a battery cell assembly, a battery pack, and an electrical device. The battery cell assembly includes: an adjacent first battery cell module and a second battery cell module, each including multiple battery cells. A pressure relief structure for each cell in the first battery cell module is located at the end of the cell facing the second battery cell module, and a pressure relief structure for each cell in the second battery cell module is located at the end of the cell facing the first battery cell module. A separator is located between the first and second battery cell modules. Both the first and second battery cell modules are connected to the separator, and pressure relief channels are provided between the first battery cell module and the separator, and between the second battery cell module and the separator. This utility model can improve the technical problem that adjacent battery cell modules are easily damaged when a battery cell module experiences thermal runaway.

Description

Technical Field

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

[0002] The battery pack mainly consists of a housing and multiple cell modules housed within the housing, which store and supply electrical energy.

[0003] In related technologies, some battery pack cell modules adopt a horizontal design, meaning the output terminals of the cells in the module are horizontally oriented. Correspondingly, the explosion-proof structures such as the explosion-proof valves and diaphragms of the cells are also horizontally oriented. Therefore, when one cell module experiences thermal runaway, the high-temperature fluid ejected from the pressure relief structure will directly contact adjacent cell modules, causing damage to the adjacent cell modules. Utility Model Content

[0004] The embodiments of this utility model provide a cell assembly, a battery pack, and an electrical device, which can improve the technical problem that adjacent cell modules are easily damaged when a cell module experiences thermal runaway.

[0005] In a first aspect, embodiments of the present invention provide a battery cell assembly, comprising:

[0006] Adjacent first and second battery cell modules, each including multiple battery cells, wherein the pressure relief structure of a cell in the first battery cell module is located at the end of the cell facing the second battery cell module, and the pressure relief structure of a cell in the second battery cell module is located at the end of the cell facing the first battery cell module; and,

[0007] A separator is provided between the first battery cell module and the second battery cell module; both the first battery cell module and the second battery cell module are connected to the separator, and there are pressure relief channels between the first battery cell module and the separator, and between the second battery cell module and the separator.

[0008] In one embodiment, the separator includes a first separator and a second separator;

[0009] The first cell module is connected to the first separator, and has the pressure relief channel between it and the first separator;

[0010] The second cell module is connected to the second separator and has the pressure relief channel between them.

[0011] In one embodiment, the first separator and the second separator are spaced apart.

[0012] In one embodiment, both the first battery cell module and the second battery cell module further include an integrated busbar, wherein the integrated busbar of the first battery cell module is electrically connected to the battery cells of the first battery cell module, and the integrated busbar of the second battery cell module is electrically connected to the battery cells of the second battery cell module.

[0013] The separator is fixedly connected to the integrated busbar and / or the battery cell.

[0014] In one embodiment, the integrated busbar includes:

[0015] Busbar support, wherein the busbar support is fixedly connected to a plurality of the battery cells;

[0016] Multiple busbars, wherein the busbars are disposed on the busbar support and are also electrically connected to the battery cells; and,

[0017] An insulating component is connected and fixed to the busbar, and a separator is connected and fixed to the insulating component and / or the busbar.

[0018] In one embodiment, the insulating element includes a first insulating element and a second insulating element. The first insulating element is disposed on the side of the busbar near the connected battery cell, and the second insulating element is disposed on the side of the busbar away from the connected battery cell. The second insulating element is connected and fixed to the separator; and / or,

[0019] The insulating component is bonded and fixed to the separator.

[0020] In one embodiment, the busbar support includes a first positioning hole, and the busbar is at least partially disposed in the first positioning hole.

[0021] In one embodiment, the busbar support is further provided with at least one hot riveting post, and the hot riveting post is provided between at least a portion of the first positioning holes. At least one of the busbar and the insulating member is hot riveted to the hot riveting post.

[0022] In one embodiment, the busbar support includes a second positioning hole, which communicates with the first positioning hole. The battery cell passes through the second positioning hole and is welded and fixed to the busbar.

[0023] In one embodiment, the busbar support includes a support body and a connecting side, the insulating member and the busbar are disposed on the support body, the connecting side protrudes from the support body and surrounds the insulating member and the busbar;

[0024] The connection side of the first battery cell module and the connection side of the second battery cell module are connected and fixed.

[0025] In one embodiment, the separator is sandwiched between the connection side of the first cell module and the connection side of the second cell module, such that the pressure relief channel is formed on the inner circumferential side of the connection side; or,

[0026] The separator is located on the inner circumferential side of the connecting side, such that the pressure relief channel is formed on the inner circumferential side of the connecting side.

[0027] In one embodiment, the cell assembly further includes a seal;

[0028] Both the connecting side of the first battery cell module and the connecting side of the second battery cell module are connected to the sealing element to seal the gap between the connecting side of the first battery cell module and the connecting side of the second battery cell module.

[0029] In one embodiment, the busbar support is further provided with a first mounting hole, which communicates with the inner circumferential side of the connecting side;

[0030] Both the first battery cell module and the second battery cell module further include an output busbar, which passes through the first mounting hole. The output busbar portion is located on the inner periphery of the connecting side to be electrically connected to the busbar, and the output busbar portion is located on the outer periphery of the bracket body to output the electrical energy stored in the battery cell.

[0031] The seal also seals the first mounting hole.

[0032] In one embodiment, the busbar support is further provided with a second mounting hole, which communicates with the inner circumferential side of the connecting side;

[0033] Both the first battery cell module and the second battery cell module further include a signal acquisition component. The signal acquisition component passes through the second mounting hole. A portion of the signal acquisition component is located on the inner periphery of the connection side to acquire the signal of the busbar. A portion of the signal acquisition component is located on the outer periphery of the bracket body to output the acquired signal.

[0034] The seal also seals the second mounting hole.

[0035] In one embodiment, the first battery cell module and the second battery cell module are arranged along a first direction;

[0036] Both the first battery cell module and the second battery cell module are provided with output ports. The output port portion of the first battery cell module is located on one side surface of the first battery cell module along the second direction for outputting the electrical energy stored in the battery cell. The output port portion of the second battery cell module is located on one side surface of the second battery cell module along the second direction for outputting the electrical energy stored in the battery cell. The second direction intersects with the first direction.

[0037] In one embodiment, both the first battery cell module and the second battery cell module are provided with signal acquisition components. The signal acquisition component of the first battery cell module is located on one side surface of the first battery cell module along a third direction for outputting information of the battery cell. The signal acquisition component of the second battery cell module is located on one side surface of the second battery cell module along a third direction for outputting information of the battery cell. The third direction, the second direction, and the first direction intersect each other.

[0038] In one embodiment, the battery cell assembly further includes at least two heat exchange plates;

[0039] The heat exchange plate is provided on the side of the first battery cell module away from the second battery cell module for heat exchange.

[0040] The second cell module has the heat exchange plate on the side opposite to the first cell module for heat exchange.

[0041] In one embodiment, the battery cell assembly further includes a base plate that supports the first battery cell module and the second battery cell module.

[0042] The pressure relief channel includes a first pressure relief channel and a second pressure relief channel. The first pressure relief channel is located between the first battery cell module, the separator, and the base plate, and the second pressure relief channel is located between the second battery cell module, the separator, and the base plate.

[0043] The base plate is provided with pressure relief holes, which are connected to the first pressure relief channel and the second pressure relief channel respectively.

[0044] In one embodiment, the area of ​​the pressure relief hole is greater than or equal to 4,000 square millimeters and less than or equal to 10,000 square millimeters.

[0045] Secondly, embodiments of this application also provide a battery pack, comprising:

[0046] Box; and,

[0047] At least one battery cell assembly as described above is disposed within the housing.

[0048] Thirdly, embodiments of this application also provide an electrical device, including the battery pack described above.

[0049] The beneficial effects of the embodiments of this utility model are as follows:

[0050] In embodiments of this utility model, the separator is connected to the first battery module and the second battery module respectively to separate adjacent first and second battery modules, thereby providing pressure relief channels between the first battery module and the separator, and between the second battery module and the separator. Therefore, when one of the first and second battery modules experiences thermal runaway, the high-temperature fluid ejected from the pressure relief structure by the thermally runaway battery module will be released along the corresponding pressure relief channel, and will not be able to be directly ejected to the other battery module, thus improving the technical problem that adjacent battery modules are easily damaged when a battery module experiences thermal runaway. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a three-dimensional schematic diagram of the battery cell assembly provided in an embodiment of this utility model.

[0053] Figure 2 yes Figure 1 The top view of the battery cell assembly shown.

[0054] Figure 3 yes Figure 2 The image shows a cross-sectional view of the battery cell assembly along the AA direction.

[0055] Figure 4 yes Figure 1 The exploded view of the battery cell assembly shown.

[0056] Figure 5 yes Figure 4 Exploded view of some parts and separators of the Zhongdian cell module.

[0057] Figure 6 yes Figure 5 A schematic diagram of the structure of the busbar support.

[0058] Figure 7 yes Figure 6 A magnified view of the area at point X in the image.

[0059] Figure 8 This is a three-dimensional schematic diagram of another battery cell assembly provided in an embodiment of this utility model.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100, Battery cell module; 100a, First battery cell module; 100b, Second battery cell module;

[0062] 11. Battery cell; 111. Pressure relief structure;

[0063] 12. Integrated busbar; 121. Busbar bracket; 1211. First positioning hole; 1212. Second positioning hole; 1213. Hot-riveting post; 1214. Bracket body; 1215. Connecting side; 1216. First mounting hole; 1217. Second mounting hole; 122. Busbar; 123. Insulating component; 1231. First insulating component; 1232. Second insulating component; 124. Output busbar; 125. Signal acquisition component;

[0064] 13. Sealing components;

[0065] 14. Heat exchange plate;

[0066] 15. Base plate; 151. Pressure relief hole;

[0067] 16. Foamed support;

[0068] 200. Separator;

[0069] 21. Pressure relief channel; 211. First pressure relief channel; 212. Second pressure relief channel; 22. First partition; 23. Second partition;

[0070] H1, First direction; H2, Second direction; H3, Third direction. Detailed Implementation

[0071] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0072] Please refer to Figure 1 , Figure 2 and Figure 3 This application provides a battery cell assembly. The battery cell assembly may include a separator 200 and at least two battery cell modules 100.

[0073] At least two battery cell modules 100 may include an adjacent first battery cell module 100a and a second battery cell module 100b. In the first battery cell module 100a, the pressure relief structure 111 of the battery cell 11 is provided at the end of the battery cell 11 facing the second battery cell module 100b, and in the second battery cell module 100b, the pressure relief structure 111 of the battery cell 11 is provided at the end of the battery cell 11 facing the first battery cell module 100a.

[0074] The separator 200 is disposed between the first cell module 100a and the second cell module 100b. Both the first cell module 100a and the second cell module 100b are connected to the separator 200, and there are pressure relief channels 21 between the first cell module 100a and the separator 200, and between the second cell module 100b and the separator 200.

[0075] Therefore, when one of the battery modules in the first battery module 100a and the second battery module 100b experiences thermal runaway, the high-temperature fluid ejected from the pressure relief structure 111 of the thermally runaway battery module will be released along the corresponding pressure relief channel 21, and will not be able to be directly ejected to the other battery module in the first battery module 100a and the second battery module 100b, thereby improving the technical problem that adjacent battery modules are easily damaged when a battery module experiences thermal runaway.

[0076] That is to say, the pressure relief channel 21 includes a first pressure relief channel 211 and a second pressure relief channel 212. The first pressure relief channel 211 is located between the first cell module 100a and the separator 200, and the second pressure relief channel 212 is located between the second cell module 100b and the separator 200.

[0077] When thermal runaway occurs in the first cell module 100a, the high-temperature fluid ejected from the cell 11 in the first cell module 100a will be blocked by the separator and discharged along the first pressure relief channel 211, so the second cell module 100b is not easily damaged.

[0078] When thermal runaway occurs in the second cell module 100b, the high-temperature fluid ejected from the cell 11 in the second cell module 100b will be blocked by the separator and discharged along the second pressure relief channel 212, so that the first cell module 100a is not easily damaged.

[0079] Furthermore, since the separator 200 is directly connected to the first cell module 100a and the second cell module 100b, after the first cell module 100a and the second cell module 100b are installed inside the battery pack, a large positional tolerance between the separator 200, the first cell module 100a and the second cell module 100b can be avoided. This prevents the separator 200 from failing to effectively separate the first cell module 100a and the second cell module 100b, thereby improving the reliability of the battery pack.

[0080] It is also noted here that the pressure relief structure 111 may include an explosion-proof valve and an explosion-proof plate disposed on the surface of the cell 11, etc., to burst open in the event of thermal runaway of the cell 11, thereby releasing the high-temperature fluid inside the battery.

[0081] Optionally, the pressure relief structure 111 may also include a pressure relief port disposed on the surface of the battery cell 11. The battery cell 11 is provided with an explosion-proof valve or explosion-proof plate located in the pressure relief port, so that after the explosion-proof structure inside the battery cell 11 bursts, the high-temperature fluid inside the battery cell 11 is discharged from the pressure relief port. This application embodiment does not limit this.

[0082] For example, the cell 11 can be a cylindrical battery cell, the top cover assembly of the cell 11 has an explosion-proof sheet inside, and the cap of the top cover assembly of the cell 11 has a pressure relief port as a pressure relief structure 111.

[0083] The above is an overall description of the technical solutions of the embodiments of this application. The separator 200 of the embodiments of this application will be explained below.

[0084] In some embodiments, the separator 200 may include mica paper, thereby giving the separator 200 better high-temperature resistance to prevent the separator 200 from being damaged by the high-temperature fluid ejected by the thermally runaway first cell module 100a or second cell module 100b.

[0085] The number of separators 200 can be one; the number of separators 200 can also be at least two, for example, two, three, four, five or even six, and this application embodiment does not limit this.

[0086] Please continue to refer to this. Figure 4 In some embodiments, the separator 200 includes a first separator 22 and a second separator 23. The first separator 22 is connected to the first cell module 100a, and a pressure relief channel 21 (i.e., the first pressure relief channel 211) is provided between the first cell module 100a and the first separator 22.

[0087] The second separator 23 is connected to the second cell module 100b, and there is a pressure relief channel 21 (i.e., the second pressure relief channel 212) between the second cell module 100b and the second separator 23.

[0088] Therefore, for the first cell module 100a and the second cell module 100b, even if one of the first separator 22 and the second separator 23 is damaged, the other of the first separator 22 and the second separator 23 can still play a good isolation role, thereby improving the safety and reliability of the cell assembly and the corresponding battery pack.

[0089] In some embodiments, the first separator 22 and the second separator 23 are spaced apart.

[0090] Therefore, when the first cell module 100a experiences thermal runaway, even if the temperature of the first separator 22 rises due to contact with the high-temperature fluid ejected from the first cell module 100a, the gap between the first separator 22 and the second separator 23 can reduce the heat transferred from the first separator 22 to the second separator 23, thereby preventing the second cell module 100b from also experiencing thermal runaway after being heated.

[0091] In some embodiments, an air gap is provided between the first separator 22 and the second separator 23. This air gap reduces the heat exchange efficiency between the first separator 22 and the second separator 23, thereby preventing heat transfer from one of the first battery cell module 100a and the second battery cell module 100b to the other in the event of thermal runaway.

[0092] Below, we will first give an overall introduction to the battery cell module 100, so that we can further introduce the separator 200 in conjunction with the structure of the battery cell module 100.

[0093] Please continue to refer to this. Figure 5 The battery module 100 also includes an integrated busbar 12, which is electrically connected to the battery cell 11. Thus, multiple battery cells 11 can be connected in series, in parallel, or in a mixed configuration through the integrated busbar 12.

[0094] That is to say, both the first battery cell module 100a and the second battery cell module 100b also include an integrated busbar 12. The integrated busbar 12 of the first battery cell module 100a is electrically connected to the battery cell 11 of the first battery cell module 100a, and the integrated busbar 12 of the second battery cell module 100b is electrically connected to the battery cell 11 of the second battery cell module 100b.

[0095] For example, the integrated busbar 12 includes a busbar bracket 121 and a plurality of busbars 122. The busbar bracket 121 is fixedly connected to a plurality of battery cells 11. The busbars 122 are fixedly connected to the busbar bracket 121 and are also electrically connected to the battery cells 11.

[0096] Furthermore, the integrated busbar 12 can be fixed to the battery cell 11 by the busbar bracket 121, and then multiple battery cells 11 can be connected in series, in parallel or in a mixed manner by the busbar 122.

[0097] Busbar 122 and battery cell 11 can be welded together to achieve electrical connection.

[0098] Please continue to refer to this. Figure 6 and Figure 7In some embodiments, the busbar support 121 may include a first positioning hole 1211, and the busbar 122 is at least partially disposed in the first positioning hole 1211. Thus, during the process of electrically connecting the busbar 122 to the battery cell 11, the first positioning hole 1211 can provide a better positioning effect for the busbar 122, so as to accurately connect and fix the busbar 122 to the battery cell 11.

[0099] In some embodiments, the busbar support 121 includes a second positioning hole 1212, which communicates with the first positioning hole 1211. The battery cell 11 passes through the second positioning hole 1212 for welding and fixing to the busbar 122. Therefore, during the welding process between the busbar 122 and the battery cell 11, the first positioning hole 1211 provides a better positioning effect for the busbar 122, and the second positioning hole 1212 provides a better positioning effect for the battery cell 11, facilitating accurate welding and fixing of the busbar 122 and the battery cell 11.

[0100] The busbar support 121 can be an injection molded support, so that the busbar support 121 can be easily molded with the first positioning hole 1211 and the second positioning hole 1212.

[0101] In some embodiments, the integrated busbar 12 further includes an insulating element 123, which is fixedly connected to the busbar support 121. The busbar 122 is fixedly connected to the insulating element 123.

[0102] The insulating element 123 can be fixedly connected to one busbar 122. The insulating element 123 can also be fixedly connected to at least two busbars 122, and thus the insulating element 123 can also be used to fix the connection between multiple busbars 122. This application embodiment does not limit this.

[0103] In some embodiments, the insulating member 123 includes a first insulating member 1231 and a second insulating member 1232. The first insulating member 1231 is disposed on the side of the busbar 122 close to the connected battery cell 11, and the second insulating member 1232 is disposed on the side of the busbar 122 away from the connected battery cell 11. Thus, the first insulating member 1231 and the second insulating member 1232 can be used to insulate both sides of the busbar 122, and the busbar 122 can be fixed from both sides, thereby improving the stability and reliability of the installation of the busbar 122.

[0104] In some embodiments, the insulating element 123 may include a heat-pressed film, so that the insulating element 123 can be heat-pressed to the busbar 122 by a simple heat-pressing process.

[0105] In some embodiments, the busbar support 121 is further provided with at least one hot riveting post 1213, and the hot riveting post 1213 is provided between at least a portion of the first positioning holes 1211, and at least one of the busbar 122 and the insulating member 123 is hot riveted to the hot riveting post 1213.

[0106] In the actual assembly process, the insulator 123 and busbar 122 can be placed on the busbar bracket 121 first, and then the busbar 122 and insulator 123 can be hot-riveted to the busbar bracket 121 by the hot riveting post 1213; then the busbar 122 and insulator 123 can be hot-pressed to fix them.

[0107] Next, we will continue to introduce the separator 200 in conjunction with the structure of the integrated busbar 12.

[0108] In some embodiments, the separator 200 is fixedly connected to the integrated busbar 12 and / or the battery cell 11. That is, the separator 200 may be fixedly connected only to the integrated busbar 12, or it may be fixedly connected only to the battery cell 11, or both the integrated busbar 12 and the battery cell 11 may be fixedly connected to the separator 200. This application does not limit this.

[0109] Taking the connection and fixation of the separator 200 and the integrated busbar 12 as an example, the insulating part 123 and / or the busbar 122 can be connected and fixed to the separator 200.

[0110] Understandably, in order to achieve insulation between multiple busbars 122, the area of ​​the insulating element 123 is usually relatively large. Therefore, when the insulating element 123 and the separator 200 are connected and fixed, the separator 200 can increase the connection area between the separator 200 and the cell module 100 by connecting to the larger insulating element 123, thereby improving the stability and reliability of the separator 200 installation.

[0111] For example, the second insulating member 1232 is connected and fixed to the separator 200. Therefore, after the insulating member 123 is welded and fixed to the busbar 122, the separator 200 can be directly connected to the second insulating member 1232, making the installation of the separator 200 simpler and more convenient.

[0112] In some embodiments, the insulating element 123 and the separator 200 can be bonded together to make the separator 200 easy to install.

[0113] Next, we will continue to introduce the separator 200 in conjunction with the structure of the busbar support 121.

[0114] In some embodiments, the busbar support 121 includes a support body 1214 and a connecting side 1215. An insulator 123 and a busbar 122 are disposed on the support body 1214, and the connecting side 1215 protrudes from the support body 1214, surrounding the insulator 123 and the busbar 122. Thus, the connecting side 1215 can provide some protection for the insulator 123 and the busbar 122.

[0115] In some embodiments, the connection side 1215 of the first battery cell module 100a and the connection side 1215 of the second battery cell module 100b are connected and fixed. This improves the stability and reliability of the installation of the first battery cell module 100a and the second battery cell module 100b.

[0116] For example, the connection side 1215 of the first battery cell module 100a and the connection side 1215 of the second battery cell module 100b can be connected and fixed by means of snap-fit, screw-fit, etc., and this application embodiment does not limit this.

[0117] In some embodiments, the separator 200 may be sandwiched between the first cell module 100a and the second cell module 100b, such that the pressure relief channel 21 is formed on the inner circumferential side of the connecting side 1215. Thus, the connecting side 1215 can also prevent the leakage of high-temperature fluid injected into the pressure relief channel 21 in the event of thermal runaway of the cell module 100.

[0118] Optionally, the separator 200 may be located on the inner circumference of the connecting side 1215, so that the pressure relief channel 21 is formed on the inner circumference of the connecting side 1215. Thus, the connecting side 1215 can also prevent the leakage of high-temperature fluid injected into the pressure relief channel 21 in the event of thermal runaway of the battery module 100.

[0119] like Figure 1 As shown, in some embodiments, the cell assembly further includes a seal 13. The connection side 1215 of the first cell module 100a and the connection side 1215 of the second cell module 100b are both connected to the seal 13 to seal the gap between the connection sides 1215 of the first cell module 100a and the second cell module 100b. Therefore, the seal 13 can prevent high-temperature fluid ejected during thermal runaway of the cell module 100 from leaking through the gap at the connection side 1215, thereby improving the safety and reliability of the cell assembly.

[0120] Please combine Figure 1 and Figure 7 In some embodiments, both the first cell module 100a and the second cell module 100b further include an output bus 124. The output bus 124 is connected to the bus 122 for outputting the electrical energy stored in the cell 11.

[0121] For example, the busbar bracket 121 is also provided with a first mounting hole 1216, which is connected to the inner circumference of the connecting side 1215. The output busbar 124 passes through the first mounting hole 1216. Part of the output busbar 124 is located on the inner circumference of the connecting side 1215 to be electrically connected to the busbar 122, and part of the output busbar 124 is located on the outer circumference of the bracket body 1214 to output the electrical energy stored in the battery cell 11.

[0122] In some embodiments, the seal 13 also seals the first mounting hole 1216. This prevents the high-temperature fluid ejected during thermal runaway of the battery module 100 from leaking through the gap at the first mounting hole 1216, thereby improving the safety and reliability of the battery assembly.

[0123] In addition, the sealing element 13 can seal the gap between the connection side 1215 of the first cell module 100a and the connection side 1215 of the second cell module 100b, and can also seal the first mounting hole 1216, so that the cell assembly has the advantages of simple structure and easy assembly.

[0124] In some embodiments, both the first cell module 100a and the second cell module 100b further include a signal acquisition component 125. The signal acquisition component 125 is used to acquire information from the bus 122. For example, the signal acquisition component 125 is used to acquire information such as the temperature and voltage of the bus 122, so that the battery pack can provide accurate and effective control over the cell assembly.

[0125] For example, the busbar bracket 121 may be provided with a second mounting hole 1217, which communicates with the inner peripheral side of the connecting side 1215. The signal acquisition component 125 passes through the second mounting hole 1217, with part of the signal acquisition component 125 located on the inner peripheral side of the connecting side 1215 for electrical connection with the busbar 122, and part of the signal acquisition component 125 located on the outer peripheral side of the bracket body 1214 for outputting the acquired signal.

[0126] In some embodiments, the seal 13 also seals the second mounting hole 1217. This prevents the high-temperature fluid ejected during thermal runaway of the cell module 100 from leaking through the gap at the second mounting hole 1217, thereby improving the safety and reliability of the cell assembly.

[0127] In addition, the seal 13 can seal the gap between the connection side 1215 of the first cell module 100a and the connection side 1215 of the second cell module 100b, and can also seal the second mounting hole 1217, so that the cell assembly has the advantages of simple structure and easy assembly.

[0128] In some embodiments, the seal 13 may include mica paper. This gives the seal 13 better high-temperature resistance to prevent the separator 200 from being damaged by the high-temperature fluid ejected from the thermally runaway battery module 100.

[0129] In some embodiments, the seal 13 and the busbar bracket 121 can be bonded together to make the separator 200 easy to install.

[0130] In some embodiments, the first cell module 100a and the second cell module 100b are both arranged along the first direction H1.

[0131] The output row 124 of the first cell module 100a is located on one side surface of the first cell module 100a along the second direction H2 for outputting the electrical energy stored in the cell 11. The first direction H1 and the second direction H2 intersect.

[0132] The output row 124 of the second cell module 100b is located on one side surface of the second cell module 100b along the second direction H2 for outputting the electrical energy stored in the cell 11. The first direction H1 and the second direction H2 intersect.

[0133] Furthermore, this allows the battery cell module 100 to output from the side (i.e., one side surface of the second direction H2), so as to make full use of the space around the battery cell module 100, thereby facilitating the miniaturization design of the battery cell assembly.

[0134] In some embodiments, the signal acquisition component 125 of the first cell module 100a is located on one side surface of the first cell module 100a along the third direction H3 for outputting information of the cell 11. The third direction H3, the second direction H2 and the first direction H1 intersect each other.

[0135] The signal acquisition component 125 of the second cell module 100b is located on one side surface of the second cell module 100b along the third direction H3 for outputting information of the cell 11. The third direction H3, the second direction H2 and the first direction H1 intersect each other.

[0136] Furthermore, this allows the battery cell module 100 to output from the side (i.e., one side surface facing H3), making full use of the space around the battery cell module 100, which is beneficial for the miniaturization design of the battery cell assembly.

[0137] In some implementations, the first direction H1 can be left-right, the second direction H2 can be front-back, and the third direction H3 can be up-down. Of course, depending on the installation posture of the battery cell assembly, the third direction H3, the second direction H2, and the first direction H1 can be interchanged, and this application embodiment does not limit this.

[0138] Please continue to refer to this. Figure 8 In some embodiments, the battery cell module 100 further includes a foaming bracket 16 having a receiving cavity in which the battery cell 11 is partially disposed.

[0139] Therefore, the battery cell 11 can be better positioned by the foam support 16, so that the battery cell 11 can be accurately welded and fixed to the integrated busbar 12.

[0140] For example, during the production process, the battery cell 11 can first be placed in a foaming device to create a foaming support 16 for housing the battery cell 11. Then, the integrated busbar 12 is welded and fixed to the battery cell 11. Next, the separator 200 is connected and fixed to the integrated busbar 12. Then, the integrated busbars 12 of the two battery cell modules 100 are connected and fixed. Finally, a sealing element 13 is provided at the connection point of the integrated busbars 12 of the two connected modules.

[0141] In some embodiments, the cell assembly further includes a heat exchange plate 14. The heat exchange plate 14 is used to exchange heat with the cell module 100.

[0142] For example, the heat exchange plate 14 may be provided with a cooling medium flow channel for the flow of cooling medium, so that the heat exchange plate 14 can cool the battery cell module 100.

[0143] In some embodiments, the number of heat exchange plates 14 is at least two. A heat exchange plate 14 is provided on the side of the first battery cell module 100a opposite to the side of the second battery cell module 100b for heat exchange. A heat exchange plate 14 is provided on the side of the second battery cell module 100b opposite to the side of the first battery cell module 100a for heat exchange.

[0144] In some embodiments, the cell assembly further includes a base plate 15. The base plate 15 supports the first cell module 100a and the second cell module 100b.

[0145] The pressure relief channel 21 includes a first pressure relief channel 211 and a second pressure relief channel 212. The first pressure relief channel 211 is located between the first battery cell module 100a, the separator 200, and the base plate 15. The second pressure relief channel 212 is located between the second battery cell module 100b, the separator 200, and the base plate 15. The base plate 15 is provided with a pressure relief hole 151, which communicates with the first pressure relief channel 211 and the second pressure relief channel 212 respectively.

[0146] Furthermore, when a cell module 100 experiences thermal runaway, the high-temperature fluid ejected can be discharged sequentially through the pressure relief channel 21 and the pressure relief hole 151, without being sprayed onto adjacent cell modules 100.

[0147] In some embodiments, the area of ​​the pressure relief hole 151 is greater than or equal to 4000 square millimeters and less than or equal to 10000 square millimeters. This avoids both the situation where the area of ​​the pressure relief hole 151 is too large, resulting in insufficient strength of the base plate 15, and the situation where the area of ​​the pressure relief hole 151 is too small, resulting in the inability to discharge the high-temperature fluid in the event of thermal runaway of the battery cell module 100 in a timely manner.

[0148] For example, the area of ​​the pressure relief hole 151 is 4000 square millimeters, 4176 square millimeters, 4250 square millimeters, 4341 square millimeters, 4456 square millimeters, 4776 square millimeters, 4800 square millimeters, 4864 square millimeters, 4900 square millimeters, 4950 square millimeters, 5000 square millimeters, 5300 square millimeters, 5607 square millimeters, 6000 square millimeters, 6506 square millimeters, 6975 square millimeters, 7000 square millimeters, 7500 square millimeters, 7643 square millimeters, 8000 square millimeters, 8199 square millimeters, 8604 square millimeters, 9000 square millimeters, 9010 square millimeters, 9507 square millimeters, or 10000 square millimeters. This application embodiment does not limit this.

[0149] This application also provides a battery pack. The battery pack may include a housing and at least one of the above-described cell assemblies. The cell assembly is disposed within the housing.

[0150] Since the battery pack has the aforementioned cell assembly, and thus possesses all the advantages of the aforementioned cell assembly, the embodiments of this application will not be elaborated upon here.

[0151] This application also provides an electrical device. The electrical device includes the battery pack described above.

[0152] Since the electrical equipment has the aforementioned battery cell assembly, and thus possesses all the advantages of the aforementioned battery cell assembly, the embodiments of this application will not be elaborated upon here.

[0153] Electrical equipment can include vehicles, such as cars, ships, and airplanes. It can also include weighing scales, body fat scales, nutrition scales, body composition analyzers, charging devices, mobile terminals, and smart home devices, but this application does not limit the scope of such devices.

[0154] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An electric cell assembly, comprising: include: The first and second battery cell modules are adjacent to each other. Both the first and second battery cell modules include multiple battery cells. The pressure relief structure of the battery cell in the first battery cell module is located at the end of the battery cell facing the second battery cell module. The pressure relief structure of the battery cell in the second battery cell module is located at the end of the battery cell facing the first battery cell module. and, A separator is provided between the first battery cell module and the second battery cell module; both the first battery cell module and the second battery cell module are connected to the separator, and there are pressure relief channels between the first battery cell module and the separator, and between the second battery cell module and the separator.

2. The battery cell assembly according to claim 1, characterized in that, The partition includes a first partition and a second partition; The first battery cell module is connected to the first separator, and has the pressure relief channel between it and the first separator; The second cell module is connected to the second separator and has the pressure relief channel between them.

3. The electric cell assembly of claim 2, wherein, The first separator and the second separator are spaced apart.

4. The electric cell assembly of claim 1, wherein, Both the first battery cell module and the second battery cell module further include an integrated busbar. The integrated busbar of the first battery cell module is electrically connected to the battery cell of the first battery cell module, and the integrated busbar of the second battery cell module is electrically connected to the battery cell of the second battery cell module. The separator is fixedly connected to the integrated busbar and / or the battery cell.

5. The electric cell assembly of claim 4, wherein, The integrated busbar includes: Busbar support, wherein the busbar support is fixedly connected to a plurality of the battery cells; Multiple busbars, wherein the busbars are disposed on the busbar support and are also electrically connected to the battery cells; and, An insulating component is connected and fixed to the busbar, and a separator is connected and fixed to the insulating component and / or the busbar.

6. The electric cell assembly of claim 5, wherein, The insulating component includes a first insulating component and a second insulating component. The first insulating component is disposed on the side of the busbar near the connected battery cell, and the second insulating component is disposed on the side of the busbar away from the connected battery cell. The second insulating component is connected and fixed to the separator; and / or, The insulating component is bonded and fixed to the separator.

7. The electric cell assembly of claim 5, wherein, The busbar support includes a first positioning hole, and the busbar is at least partially disposed in the first positioning hole.

8. The electric cell assembly of claim 7, wherein, The busbar support is also provided with at least one hot riveting post, and the hot riveting post is provided between at least a portion of the first positioning holes. At least one of the busbar and the insulating member is hot riveted to the hot riveting post.

9. The electric cell assembly of claim 7, wherein, The busbar support includes a second positioning hole, which communicates with the first positioning hole. The battery cell passes through the second positioning hole and is welded and fixed to the busbar.

10. The electric cell assembly of claim 5, wherein, The busbar support includes a support body and a connecting side. The insulating element and the busbar are disposed on the support body. The connecting side protrudes from the support body and surrounds the insulating element and the busbar. The connection side of the first battery cell module and the connection side of the second battery cell module are connected and fixed.

11. The electric cell assembly of claim 10, wherein, The separator is sandwiched between the connection side of the first battery cell module and the connection side of the second battery cell module, so that the pressure relief channel is formed on the inner circumference of the connection side; or, The separator is located on the inner circumferential side of the connecting side, such that the pressure relief channel is formed on the inner circumferential side of the connecting side.

12. The electric cell assembly of claim 10, wherein, The battery cell assembly also includes a seal; Both the connecting side of the first battery cell module and the connecting side of the second battery cell module are connected to the sealing element to seal the gap between the connecting side of the first battery cell module and the connecting side of the second battery cell module.

13. The electric cell assembly of claim 12, wherein, The busbar support is also provided with a first mounting hole, which is connected to the inner circumferential side of the connecting side. Both the first battery cell module and the second battery cell module further include an output busbar, which passes through the first mounting hole. The output busbar portion is located on the inner periphery of the connecting side to be electrically connected to the busbar, and the output busbar portion is located on the outer periphery of the bracket body to output the electrical energy stored in the battery cell. The seal also seals the first mounting hole.

14. The electric cell assembly of claim 12, wherein, The busbar support is also provided with a second mounting hole, which is connected to the inner circumferential side of the connecting side; Both the first battery cell module and the second battery cell module further include a signal acquisition component. The signal acquisition component passes through the second mounting hole. A portion of the signal acquisition component is located on the inner periphery of the connection side to acquire the signal of the busbar. A portion of the signal acquisition component is located on the outer periphery of the bracket body to output the acquired signal. The seal also seals the second mounting hole.

15. The electric cell assembly of claim 1, wherein, The first battery cell module and the second battery cell module are arranged along a first direction; Both the first battery cell module and the second battery cell module are provided with output ports. The output port portion of the first battery cell module is located on one side surface of the first battery cell module along the second direction for outputting the electrical energy stored in the battery cell. The output port portion of the second battery cell module is located on one side surface of the second battery cell module along the second direction for outputting the electrical energy stored in the battery cell. The second direction intersects with the first direction.

16. The electric cell assembly of claim 15, wherein, Both the first battery cell module and the second battery cell module are equipped with signal acquisition components. The signal acquisition component of the first battery cell module is located on one side of the first battery cell module along a third direction to output the information of the battery cell. The signal acquisition component of the second battery cell module is located on one side of the second battery cell module along a third direction to output the information of the battery cell. The third direction, the second direction, and the first direction intersect each other.

17. The cell assembly of any one of claims 1 to 16, wherein, The battery cell assembly also includes at least two heat exchange plates; The heat exchange plate is provided on the side of the first battery cell module away from the second battery cell module for heat exchange. The second cell module has the heat exchange plate on the side opposite to the first cell module for heat exchange.

18. The cell assembly of any one of claims 1-6, wherein, The battery cell assembly also includes a base plate, which supports the first battery cell module and the second battery cell module. The pressure relief channel includes a first pressure relief channel and a second pressure relief channel. The first pressure relief channel is located between the first battery cell module, the separator, and the base plate, and the second pressure relief channel is located between the second battery cell module, the separator, and the base plate. The base plate is provided with pressure relief holes, which are connected to the first pressure relief channel and the second pressure relief channel respectively.

19. The electric cell assembly of claim 18, wherein, The area of ​​the pressure relief hole is greater than or equal to 4000 square millimeters and less than or equal to 10000 square millimeters.

20. A battery pack, characterized by include: Box; and, At least one cell assembly as described in any one of claims 1 to 19, the cell assembly being disposed within the housing.

21. An electrical device, comprising: Includes the battery pack as described in claim 20.

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