Battery cell group module, battery pack and power utilization device

Abstract

The utility model belongs to a battery cell group module, a battery pack and an electric device in the technical field of power batteries. The battery cell group module comprises a plurality of battery cell stacking bodies which are arranged along a first direction, and each battery cell stacking body comprises a plurality of battery cells which are stacked along a second direction; the connecting beams are arranged between every two adjacent battery cell stacking bodies; the two side plate groups are distributed on the two sides of the battery cell stacking body in the second direction, and the side plate groups are connected with the connecting beams so as to clamp and fix the battery cell stacking body; and the electrical assembly is integrated and fixed on the connecting beam and / or the side plate group. The side plate groups are connected and matched with the connecting beams, so that the cell stack can be mounted and clamped, the transportation requirement can be met, the structure can be simplified, the space utilization rate can be increased, and the cost can be reduced; the electrical assembly is integrated and fixed on the connecting beam and / or the side plate group, independent fixation is not needed, the number of parts is reduced, the integration degree is improved, the subsequent installation steps are simplified, and the energy density and the production efficiency of the battery pack are improved.

Description

Technical Field

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

[0002] Traditional soft-pack battery packs are designed with modules as the cell carriers. Multiple modules and electrical components such as the battery management system need to be fixed relatively independently inside the battery pack housing. This not only affects the production cycle but also occupies a lot of space and affects the battery energy density. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a battery cell module, battery pack and power device to solve the problems of low space utilization and low production efficiency in the prior art, so as to improve battery energy density and reduce cost.

[0004] To achieve the above and other related objectives, this utility model provides a battery cell assembly module, comprising:

[0005] Multiple battery cell stacks are arranged along a first direction, and each battery cell stack includes multiple battery cells stacked along a second direction.

[0006] A connecting beam is arranged between two adjacent battery cell stacks;

[0007] Two side plate assemblies are distributed on both sides of the cell stack along the second direction, and the side plate assemblies are connected to the connecting beam to clamp and fix the cell stack.

[0008] Electrical components, which are integrated and fixed to the connecting beam and / or the side plate assembly.

[0009] Optionally, each of the side plate groups includes a plurality of side plate segments distributed along the first direction and detachably connected, wherein the side plate segments located on both sides of the same cell stack are detachably connected to the two ends of the corresponding connecting beam.

[0010] Optionally, multiple side plate segments of the same side plate group correspond one-to-one with multiple battery cell stacks, and when two side plate segments located on both sides of the battery cell stack are connected to the connecting beam, the battery cell stack is clamped and fixed along the second direction.

[0011] Optionally, the side plate segment has a first connecting portion, and two adjacent first connecting portions of two adjacent side plate segments in the same side plate group are stacked along the second direction and connected and locked with the connecting beam.

[0012] Optionally, one of the two overlapping first connecting parts has an L-shaped cross-section, and the other first connecting part has an inverted L-shaped cross-section that is adapted to and fits the L-shaped structure.

[0013] Optionally, the electrical components include a battery management system and a sampling element. The battery management system includes multiple slave control boards, which are mounted and fixed on the side plate assembly and are electrically connected to the multiple cell stacks respectively through the sampling element.

[0014] Optionally, the side plate group includes multiple side plate segments distributed along the first direction and detachably connected, and the multiple side plate segments in the same side plate group correspond one-to-one with the battery cell stack; each side plate segment is equipped with the slave control board, and the slave control board is electrically connected to the corresponding battery cell stack through the sampling element.

[0015] Optionally, the side plate assembly is provided with a groove, the slave control plate is installed in the groove, and the outer wall of the slave control plate is lower than or flush with the groove opening.

[0016] Optionally, the groove is disposed on the outer side of the side plate assembly opposite to the cell stack and extends through the top of the side plate assembly in a third direction. The top of the slave control plate does not protrude from the top of the side plate assembly, and the sidewall of the slave control plate does not protrude from the outer sidewall of the side plate assembly.

[0017] Optionally, the control panel is fixed to the side panel assembly by snap-fit ​​or bolt connection.

[0018] Optionally, some adjacent two cell stacks have a first connecting tab. The electrical component includes a bridging bus and a first connecting bus. The first connecting bus is connected to the first connecting tab. The projections of the first connecting buses connected to the first connecting tabs of two adjacent cell stacks in the first direction are staggered, and they are connected and fixed to the connecting beam through the bridging bus.

[0019] Optionally, some of the cell stacks have low-voltage output tabs. The electrical components include a low-voltage busbar bracket and a low-voltage output busbar. The low-voltage busbar bracket is positioned and mounted on the side plate assembly. The low-voltage output busbar is mounted on the low-voltage busbar bracket and connected to the low-voltage output tab.

[0020] Optionally, some of the cell stacks have high-voltage output tabs, and the electrical components include a high-voltage busbar bracket and a high-voltage output busbar, the high-voltage output busbar being mounted on the high-voltage busbar bracket, and the connection end of the high-voltage output busbar being connected to the high-voltage output tab.

[0021] Optionally, the low-voltage output bus and the high-voltage output bus are located on both sides of the battery cell module in the first direction, respectively. The high-voltage output bus is adapted to output high voltage, and the low-voltage output bus is adapted to output low voltage.

[0022] Optionally, a connecting beam, forming an end beam, is arranged on the side of the cell stack located away from its adjacent cell stack, and the connecting beam is connected to the end of the side plate assembly; the high-voltage output bus and the low-voltage output bus are respectively insulatedly connected to the two connecting beams on both sides.

[0023] Optionally, some adjacent cell stacks have a second connection tab. The electrical component includes a first bracket and a second connection bus. The first bracket is positioned and mounted on the side plate assembly. The second connection bus is mounted on the first bracket and connected to the second connection tab. The second connection bus is also connected to another second connection bus connected to an adjacent cell stack.

[0024] Optionally, some adjacent cell stacks have a third connecting tab. The electrical component includes a second bracket and a third connecting bus. The second bracket is located between the cell stack and the connecting beam and is mounted on the connecting beam. The third connecting bus is fixed to the second bracket and connected to the third connecting tab. The third connecting bus is also connected to another third connecting bus on an adjacent cell stack.

[0025] Optionally, the battery cell includes a pouch cell.

[0026] Optionally, a connecting beam, formed as an end beam, is arranged on the side of the cell stack located away from its adjacent cell stack, and the ends of the two side plate groups are connected by the end beam; and / or, the ends of the two side plate groups are fastened together by strapping.

[0027] To achieve the above and other related objectives, this utility model also provides a battery pack, including the cell assembly module as described above and a plate-shaped lower housing, wherein the side plate assembly is connected to the lower housing to mount the cell stack on the lower housing.

[0028] Optionally, the battery pack further includes a top cover, which is sealed to the lower housing to define an installation space for accommodating the battery cell stack, the installation space being filled with coolant that immerses the battery cell stack.

[0029] Optionally, a portion of the lower housing protrudes in a direction away from the battery cell module to form a receiving cavity, and the battery cell module is installed in the receiving cavity.

[0030] To achieve the above and other related objectives, this utility model also provides an electrical device, including the battery cell assembly module as described above.

[0031] Optionally, the electrical device includes a vehicle, the bottom of which has an installation space, and the battery cell module is installed in the installation space.

[0032] As described above, the battery cell module, battery pack, and power supply device of this utility model have at least the following beneficial effects: the side plate assembly and the connecting beam can be connected and clamped to install the battery cell stack, which can not only meet the transportation requirements, but also simplify the structure, which is conducive to improving space utilization and reducing costs; based on this, the electrical components are integrated and fixed on the connecting beam and / or the side plate assembly, without the need for independent fixing, which reduces the number of parts, improves the degree of integration, simplifies the subsequent installation steps, and is conducive to improving the energy density and production efficiency of the battery pack. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a first embodiment of the battery cell assembly module of this utility model;

[0034] Figure 2 for Figure 1 Exploded view of the core module of China Electronics Technology Group Corporation (CETC);

[0035] Figure 3 This is a schematic diagram of the structure of the battery cell assembly module of this utility model in embodiment two;

[0036] Figure 4 for Figure 3 Exploded view of the core module of China Electronics Technology Group Corporation (CETC);

[0037] Figure 5 for Figure 3 A partial structural diagram of the CNEDC cell module;

[0038] Figure 6 for Figure 5 Top view of the CEC module;

[0039] Figure 7 for Figure 6 A magnified schematic diagram of part A in the middle;

[0040] Figure 8 for Figure 7 A partially exploded view of the first support, the second connecting busbar, the side plate assembly, and the connecting beam.

[0041] Figure 9 for Figure 6A magnified schematic diagram of part B in the middle;

[0042] Figure 10 for Figure 9 A schematic diagram of the partial structural connection of the intermediate busbar and the first connecting busbar;

[0043] Figure 11 for Figure 9 A partial exploded view of the intermediate busbar and the first connecting busbar;

[0044] Figure 12 for Figure 6 A magnified schematic diagram of part C in the middle;

[0045] Figure 13 for Figure 12 A schematic diagram of the partial structural connection between the medium and low voltage busbar support and the low voltage output busbar;

[0046] Figure 14 for Figure 12 A partial explosion diagram of the medium and low voltage busbar support and the low voltage output busbar;

[0047] Figure 15 for Figure 3 A simplified partial structural diagram of the CEC module;

[0048] Figure 16 for Figure 6 A magnified schematic diagram of part D in the middle;

[0049] Figure 17 This is a partial connection structure diagram of the second bracket, the third connecting busbar, and the connecting beam in Embodiment 3 of the battery cell assembly module of this utility model;

[0050] Figure 18 for Figure 17 A partially exploded view of the first support, second connecting busbar, and connecting beam of the CNC cell module;

[0051] Figure 19 This is a schematic diagram of the structure of an embodiment of the battery pack of this utility model;

[0052] Figure 20 for Figure 19 A schematic diagram of a partial explosion of the battery pack in the middle;

[0053] Figure 21 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0054] Part Number Explanation

[0055] The battery cell module 100 includes a battery cell stack 1, a battery cell 11, a first connecting tab 12, a low-voltage output tab 13, a second connecting tab 14, a first sub-stack 15, a second sub-stack 16, a high-voltage output tab 17, a third connecting tab 18, a connecting beam 2, a first mounting slot 21, a second mounting slot 22, a side plate assembly 3, a side plate segment 31, a first connecting part 311, a groove 312, a control board 401, a sampling element 402, a bridging bus 403, a first connecting bus 404, a low-voltage bus bracket 405, a low-voltage output bus 406, a first bracket 407, and a third connecting tab 408. 408 connecting busbar, 409 connecting pole base, 410 low-voltage output pole base, 411 insulating sleeve, 412 bridging base, 413 third bracket, 414 high-voltage output busbar, 415 high-voltage busbar bracket, 416 high-voltage output pole base, 417 second bracket, 418 third connecting busbar, 51 top cover, 52 lower housing, 521 receiving cavity, 6 strap, 71 first locking member, 72 second locking member, 73 third locking member, 74 fourth locking member, 75 fifth locking member, 76 sixth locking member, 8 insulating partition, 200 battery pack, 300 vehicle, 301 installation space. Detailed Implementation

[0056] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0057] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0058] See Figures 1 to 4In some optional embodiments, the present invention provides a battery cell assembly module 100, which includes multiple battery cell stacks 1, connecting beams 2, two side plate assemblies 3, and electrical components. The multiple battery cell stacks 1 are arranged along a first direction, and each battery cell stack 1 includes multiple battery cells 11 stacked along a second direction. The battery cells 11 include pouch cells. A connecting beam 2 is arranged between two adjacent battery cell stacks 1. The two side plate assemblies 3 are distributed along the second direction on both sides of the battery cell stack 1. The side plate assemblies 3 are connected to the connecting beams 2 to clamp and fix the battery cell stacks 1. The electrical components are integrated and fixed on the connecting beams 2 and / or the side plate assemblies 3.

[0059] Optionally, there can be multiple connecting beams 2, which are distributed along the first direction.

[0060] In the above embodiment, the battery cell module, with the side plate group 3 and the connecting beam 2 forming a frame, can clamp and install the battery cell stack 1, meeting the transportation requirements. The electrical components are integrated and fixed on the frame formed by the side plate group 3 and the connecting beam 2, without the need for separate installation and fixing, i.e., without the need for separate fixing brackets. This simplifies the structure, improves space utilization and energy density, reduces production steps, and lowers costs. Specifically, after the battery cell module is assembled, it can form a battery device without a shell, so that it can be directly installed and used later, for example, it can be directly installed in the installation space of the battery pack or the installation space of the electrical device.

[0061] See Figure 1 and Figure 2 In some optional embodiments, in the first direction, connecting beams corresponding to the ends of the side plate group 3 are also provided on both sides of the cell assembly module 100. That is, a connecting beam 2 forming an end beam is also arranged on the side of the cell stack 1 located away from its adjacent cell stack 1. The end beam corresponds to and is connected to the end of the side plate group 3. The connecting beam 2 located between two adjacent cell stacks 1 forms an intermediate beam. The ends of the two side plate groups 3 are connected by the end beam, which is beneficial to further improve the stability of the corresponding cell stack 1 being clamped and the rigidity of the overall structure.

[0062] See Figure 3 and Figure 4 In some optional embodiments, in the first direction, the ends of the two side plate groups 3 are fastened together by straps 6. Specifically, the straps 6 are correspondingly arranged to the ends of the side plate groups 3. The straps 6 are sleeved on the ends of the two side plate groups 3 so that the two side plate groups 3 move towards each other and clamp the corresponding cell stack 1. This can ensure the stability of the cell stack 1 being clamped without the need for end beams. Compared with end beams, the straps 6 occupy less space and are lighter, which is beneficial to improving space utilization and increasing the energy density of the cell module.

[0063] It is understandable that the ends of the two side plate groups 3 can be connected only by end beams; or, the ends of the two side plate groups 3 can be secured only by straps 6; or, the ends of the two side plate groups 3 can be connected by end beams and also secured by straps 6 to the ends of the two side plate groups 3, further improving the stability of the overall structure.

[0064] See Figures 3 to 8 In some optional embodiments, each side plate group 3 includes a plurality of side plate segments 31 distributed along a first direction and detachably connected. The side plate segments 31 located on both sides of the same cell stack 1 are detachably connected to the two ends of the corresponding connecting beam 2 distributed along a second direction.

[0065] Optionally, the side plate section 31 and the connecting beam 2 can be connected and locked by a first locking member 71, which includes bolts, ensuring reliable connection and easy and convenient disassembly and assembly.

[0066] Optionally, multiple side plate segments 31 in the same side plate group 3 correspond one-to-one with multiple battery cell stacks 1. When the two side plate segments 31 located on both sides of the battery cell stack 1 are connected to the connecting beam 2, the battery cell stack 1 is clamped and fixed along the second direction. The assembly is simple and flexible. The number of side plate segments 31 in the side plate group 3 can be increased or decreased according to the actual number of battery cell stacks 1 required, so as to meet the requirements of different charge levels and facilitate universal setting.

[0067] Optionally, the side plate segment 31 has a first connecting portion 311. Two adjacent first connecting portions 311 of two adjacent side plate segments 31 in the same side plate group 3 are stacked along a second direction and connected and locked to the connecting beam 2. Specifically, one end of the first locking member 71 passes through the first connecting portions 311 of the two adjacent side plate segments 31 along the second direction and is threadedly connected to the connecting beam 2. Further, one of the two stacked first connecting portions 311 has an L-shaped cross-section, and the other has an inverted L-shaped cross-section that fits and conforms to the L-shaped structure. The side plate segment 31 can be an aluminum profile, an injection-molded part, or a die-cast part.

[0068] In this invention, the first direction is perpendicular to the second direction. Specifically, the arrangement direction of the multiple battery cell stacks 1, the arrangement direction of the multiple side plate segments 31 in each side plate group 3, the length direction of the side plate segments 31, the arrangement direction of the multiple connecting beams 2, the length direction of the battery cell stack 1, and the length direction of the battery cell 11 are the same as the first direction, i.e., the X direction in the figures. The arrangement direction of the multiple battery cells 11 in each battery cell stack 1, the arrangement direction of the two side plate groups 3, the length direction of the connecting beams 2, the width direction of the battery cell stack 1, and the thickness direction of the battery cell 11 are the same as the second direction, i.e., the Y direction in the figures.

[0069] In the above embodiment, the battery cell module includes a side plate assembly 3 comprising multiple independently arranged side plate segments 31. The side plate segments 31 can be detachably connected to each other and to the connecting beam 2, which facilitates flexible assembly according to the number of battery cell stacks 1, avoids space waste, and helps to improve space utilization and further reduce costs. In addition, multiple battery cell stacks 1 can be connected and combined into an integral structure through the side plate assembly 3 and the connecting beam 2, which can not only save the process of separately packing the battery cell stacks 1, but also improve the rigidity of the overall structure of the battery cell module.

[0070] See Figures 3 to 5 In some alternative embodiments, the electrical components include a battery management system and a sampling element 402. The battery management system includes a plurality of slave control boards 401, which are mounted and fixed on the side plate assembly 3 and are electrically connected to a plurality of cell stacks 1 through the sampling element 402.

[0071] Optionally, the battery management system also includes a main control board. Slave control boards 401 are connected to the cell stack 1 via sampling elements 402, which include flexible printed circuits (FPCs). The main control board is connected to multiple slave control boards 401. Furthermore, each side panel segment 31 is equipped with a slave control board 401. The slave control board 401 can be connected to the corresponding cell stack 1 via the sampling elements 402 to collect voltage signals from the cells 11 in the cell stack 1. The main control board then uses the multiple slave control boards 401 to diagnose and control each cell 11.

[0072] Optionally, the side plate assembly 3 is provided with a groove 312, and the slave control plate 401 is installed in the groove 312. The outer wall of the slave control plate 401 is lower than or flush with the groove opening of the groove 312. The slave control plate 401 is easy and convenient to install, and during transportation, the side plate assembly 3 is compressed before the slave control plate 401. The side plate assembly 3 protects the slave control plate 401 and helps reduce the risk of pressure on the slave control plate 401. Furthermore, the groove 312 is located on the outer side of the side plate assembly 3 facing away from the cell stack 1. The groove 312 extends through the top of the side plate assembly 3 in a third direction. The top of the slave control plate 401 does not protrude from the top of the side plate assembly 3, and the side wall of the slave control plate 401 does not protrude from the outer side wall of the side plate assembly 3.

[0073] Optionally, the control panel 401 can be fixed to the side panel assembly 3 by snap-fit ​​or bolt connection, making the connection operation simple and convenient.

[0074] See Figures 3 to 6 , Figures 9 to 11 and Figure 15In some optional embodiments, some adjacent two cell stacks 1 have a first connecting tab 12. The electrical components include a bridging bus 403 and a first connecting bus 404. The first connecting bus 404 is connected to the first connecting tab 12, and the projections of the first connecting bus 404 connected to the first connecting tabs 12 of adjacent two cell stacks 1 in the first direction are staggered, and they are connected and fixed to the connecting beam 2 through the bridging bus 403.

[0075] Optionally, the first connecting bus 404 includes a copper bar.

[0076] Optionally, the bridging bus 403 includes copper bars.

[0077] Optionally, a portion of the cells 11 in the same cell stack 1 form a first sub-stack 15, and another portion of the cells 11 form a second sub-stack 16. The first sub-stacks 15 of two adjacent cell stacks 1 are close to the same side plate group 3, and the second sub-stacks 16 of two adjacent cell stacks 1 are close to the other side plate group 3. That is, the arrangement direction of the first sub-stacks 15 and the second sub-stacks 16 of two adjacent cell stacks 1 is the same in the second direction. For example, the first sub-stacks 15 and the second sub-stacks 16 of two adjacent cell stacks 1 are arranged from left to right in the second direction, or from right to left in the second direction. The first connecting tab 12 includes a first tab of a first sub-stack 15 and a second tab of a second sub-stack 16. The first connecting bus 404 connected to the first tab and the first connecting bus 404 connected to the second tab of the adjacent cell stack 1 are connected through a bridging bus 403. The first connecting bus 404 connected to the second tab and the first connecting bus 404 connected to the first tab of the adjacent cell stack 1 are connected through another bridging bus 403. Furthermore, the number of cells 11 in the first sub-stacks 15 of the two adjacent cell stacks 1 are not equal, and the number of cells 11 in the second sub-stacks 16 of the two adjacent cell stacks 1 are not equal. Specifically, the total number of cells 11 in each cell stack 1 is equal. If the number of cells 11 in the first sub-stack 15 is greater than the number of cells 11 in the first sub-stack 15 of the adjacent cell stack 1, then the number of cells 11 in the second sub-stack 16 is less than the number of cells 11 in the second sub-stack 16 of the adjacent cell stack 1; or, if the number of cells 11 in the first sub-stack 15 is less than the number of cells 11 in the first sub-stack 15 of the adjacent cell stack 1, then the number of cells 11 in the second sub-stack 16 is greater than the number of cells 11 in the second sub-stack 16 of the adjacent cell stack 1. By adjusting the number of cells 11 in the first sub-stack 15 and the second sub-stack 16 of adjacent cell stacks 1, the projections of the first connecting busbars 404 connected to each sub-stack in the first direction are staggered. That is, the first connecting busbars 404 connected to each sub-stack can be distributed at intervals in the second direction, and the interval distance adjustment is highly flexible. This allows for staggered overlap between the two first connecting tabs 12 through the bridging busbars 403, which helps to improve the creepage distance of each sub-stack when connected. In particular, compared with the layout where the first connecting tabs 12 of two adjacent cell stacks 1 are arranged facing each other and directly connected in the first direction, the creepage distance of adjacent cell stacks 1 is increased, thus improving electrical safety.

[0078] Optionally, the first and second tabs connected to the same bridging bus 403 have opposite polarities, and the portion between the two ends of one bridging bus 403 extends along the second direction across the other bridging bus 403 and is spaced apart from the other bridging bus 403 in the third direction. By reasonably allocating the positive and negative polarities of the battery cells 11, the bridging bus 403 can connect the two sub-stacks of two adjacent battery cell stacks 1 in series, while avoiding cross contact with the other bridging bus 403, resulting in a compact layout and improved space utilization. Furthermore, the portion between the two ends of the bridging bus 403 is a bridging portion, which is covered with an insulating sleeve 411 for insulation purposes. Specifically, one bridging bus 403 is Ω-shaped, and the other bridging bus 403 is I-shaped. The Ω-shaped bridging bus 403 crosses the I-shaped bridging bus 403 along the second direction.

[0079] Optionally, an insulating partition 8 is provided between the first sub-stack 15 and the second sub-stack 16 of the same cell stack 1, or in other words, an insulating partition 8 is provided between some adjacent cells 11 of the same cell stack 1. The first connecting bus 404 is mounted on the insulating partition 8 through a third bracket 413. The third bracket 413 includes a plastic bracket. The first connecting bus 404 can be riveted and fixed to the third bracket 413. Since the material of the first connecting tab 12 is relatively soft, it is difficult to provide stable installation support for the first connecting bus 404. The insulating partition 8 can provide installation support for the first connecting bus 404 through the third bracket 413. The first connecting bus 404 is not easy to shake, which helps to reduce the connection difficulty between the first connecting bus 404 and the bridging bus 403. The insulating partition 8 is bonded and fixed to the cells 11 of the first sub-stack 15 and the second sub-stack 16 of the same cell stack 1 on both sides in the second direction. Furthermore, in the first direction, the length of the insulating partition 8 is not less than the length of the insulating film of the battery cell 11; in the third direction, the width of the insulating partition 8 is not less than the maximum width of the electrode stack of the battery cell 11, which helps to ensure the insulation effect.

[0080] Optionally, the height direction of the connecting beam 2 is in the third direction. In the third direction, the top of the connecting beam 2 is lower than the top of the cell stack 1. The bridging bus 403 is fixed to the top of the connecting beam 2, and the bridging bus 403 is fixed to the top of the connecting beam 2 through the bridging base 412. Fixing the bridging bus 403 to the connecting beam 2 not only utilizes the unused space above the connecting beam 2, improving space utilization, but also eliminates the need for additional components to support the bridging bus 403, which helps reduce the number of parts, simplify the structure, and further improve space utilization. Furthermore, the bridging base 412 is installed on the connecting beam 2, and the first connecting bus 404 and the bridging bus 403 are connected and fixed to the bridging base 412. Specifically, the top of the connecting beam 2 is provided with a second mounting groove 22. At least a portion of the bridging base 412 extends into the second mounting groove 22 and is snapped and fixed to the second mounting groove 22. One end of the first connecting bus 404 is electrically connected to the first connecting electrode tab 12 of the cell stack 1. The other end of the first connecting bus 404 is bent and stacked on the bridging base 412 along a third direction with one end of the bridging bus 403, and is connected and fixed by the second locking member 72. The second locking member 72 includes bolts, and the connection is simple, convenient and reliable.

[0081] In this utility model, the height direction of the battery cell stack 1, the height direction of the connecting beam 2, the height direction of the side plate group 3, the height direction of the side plate segment 31, the height direction of the battery cell 11 and the third direction are the same, namely the Z direction in the figure.

[0082] In the above embodiment, the projections of multiple first connection busbars 404, which are respectively connected to the first connection tabs 12 of adjacent cell stacks 1, are staggered in the first direction and are electrically connected through bridging busbars 403. This not only enables the series and parallel connection of adjacent cell stacks 1, but also helps to increase the creepage distance between the two first connection tabs 12 during electrical connection, thereby reducing the probability of electrical safety accidents and improving the safety performance of the cell stack module.

[0083] See Figures 3 to 6 , Figures 12 to 14 In some alternative embodiments, a portion of the battery cell stack 1 has a low-voltage output electrode tab 13. The electrical components include a low-voltage bus support 405 and a low-voltage output bus 406. The low-voltage bus support 405 is positioned and assembled on the side plate assembly 3. The low-voltage output bus 406 is mounted on the low-voltage bus support 405. The connection end of the low-voltage output bus 406 is connected to the low-voltage output electrode tab 13.

[0084] Optionally, the electrical components also include a low-voltage output electrode base 410, which is mounted on the side plate section 31 of the side plate assembly 3. A low-voltage busbar bracket 405 is positioned and assembled on the side plate section 31. A low-voltage output busbar 406, which is connected to the low-voltage output electrode tab 13, is connected and fixed to the low-voltage output electrode base 410 via a third locking member 73. The output end of the low-voltage output busbar 406 is connected and fixed to the output electrode base 410 via the third locking member 73, which includes bolts, making the connection simple, convenient, and reliable. Furthermore, the low-voltage output electrode base 410 is locked and fixed to the side plate section 31 via a fourth locking member 74, which also includes bolts.

[0085] Optionally, the low-voltage output bus 406 includes a copper bar.

[0086] Optionally, the low-voltage busbar bracket 405 includes a plastic bracket.

[0087] Optionally, the low-voltage busbar bracket 405 can be embedded and / or riveted to the side plate section 31, making the connection simple, convenient, and reliable.

[0088] Specifically, during assembly, the low-voltage output electrode base 410 is first fixed to the side plate section 31, and the low-voltage output busbar 406 is fixed to the side plate section 31 via the low-voltage busbar bracket 405. The side plate section 31 is then assembled and connected to the connecting beam 2 along the second direction. After assembly, the low-voltage output busbar 406 is welded and fixed to the low-voltage output electrode tab 13 of the cell stack 1 and connected and fixed to the low-voltage output electrode base 410. The low-voltage output busbar 406, supported and fixed by the side plate section 31, is connected to the low-voltage output electrode base 410, which is also supported and fixed by the side plate section 31. Neither the low-voltage output electrode base 410 nor the low-voltage output busbar 406 is prone to shaking or displacement, ensuring the stability of the low-voltage output busbar 406 and the low-voltage output electrode base 410 when connected via the third locking member 73.

[0089] In the battery cell module of the above embodiment, the low-voltage output electrode base 410 and the low-voltage busbar bracket 405 connected to the low-voltage output busbar 406 are fixed on the side plate section 31. The side plate section 31 provides support for the low-voltage output electrode base 410 and the low-voltage busbar bracket 405. The low-voltage output electrode base 410 and the low-voltage output busbar 406 are not prone to positional displacement, the structure is stable, and it is beneficial to the external output of the battery cell stack 1.

[0090] See Figures 1 to 6 and Figure 16In some alternative embodiments, a portion of the battery cell stack 1 has a high-voltage output electrode tab 17, and the electrical components include a high-voltage bus support 415 and a high-voltage output bus 414. The high-voltage output bus 414 is mounted on the high-voltage bus support 415, and the connection end of the high-voltage output bus 414 is connected to the high-voltage output electrode tab 17.

[0091] Optionally, the low-voltage output bus 406 and the high-voltage output bus 414 are located on opposite sides of the cell assembly module in the first direction. The high-voltage output bus 414 is suitable for outputting high voltage, and the low-voltage output bus 406 is suitable for outputting low voltage. The same cell assembly module can output both high and low voltage, which not only meets different usage scenarios but also makes the layout more compact, which is beneficial to improving space utilization and reducing costs.

[0092] See Figure 1 and Figure 2 A connecting beam 2, which is formed as an end beam, is arranged on the side of the cell stack 1 located away from its adjacent cell stack 1. The connecting beam 2 is connected to the end of the side plate assembly 3. The high voltage output bus 414 and the low voltage output bus 406 are respectively insulatedly connected to the two connecting beams 2 on both sides.

[0093] Optional, see Figure 1 and Figure 2 The output terminal of the high-voltage output bus 414 is insulated from the connecting beam 2. Furthermore, the electrical assembly also includes a high-voltage output electrode base 416, through which the output terminal of the high-voltage output bus 414 is insulated from the connecting beam 2. Specifically, the high-voltage output electrode base 416 is mounted on the connecting beam 2, and the output terminal of the high-voltage output bus 414 is fixedly connected to the high-voltage output electrode base 416 by bolts. The output terminal of the low-voltage output bus 406 is insulated from the connecting beam 2. Furthermore, the output terminal of the low-voltage output bus 406 is insulated from the connecting beam 2 through a low-voltage output electrode base 410.

[0094] Optionally, an insulating partition 8 is arranged between two adjacent cells 11 in a cell stack 1 with a high-voltage output tab 17. A part of the insulating partition 8 is clamped and fixed between two adjacent cells 11 in the same cell stack 1, and the other part of the insulating partition 8 extends out between two adjacent cells 11. The high-voltage busbar bracket 415 is positioned and connected with the other part of the insulating partition 8, so that the high-voltage busbar bracket 415 is mounted on the insulating partition 8.

[0095] Optionally, the high-voltage output bus 414 includes a copper bar.

[0096] Optionally, the high-voltage busbar bracket 415 includes a plastic bracket.

[0097] Specifically, during assembly, the high-voltage output busbar 414 is mounted on the insulating partition 8 via the high-voltage busbar bracket 415. The connecting end of the high-voltage output busbar 414 is welded and fixed to the high-voltage output electrode tab 17. The insulating partition 8 provides support for the high-voltage output busbar 414 to facilitate the welding operation between the high-voltage output busbar 414 and the high-voltage output electrode tab 17. After the connecting end of the high-voltage output busbar 414 is welded and fixed to the high-voltage output electrode tab 17, the output end of the high-voltage output busbar 414 is then connected and fixed to the high-voltage output electrode base 416 on the connecting beam 2. The high-voltage output busbar 414, supported and fixed by the insulating partition 8, is connected to the high-voltage output electrode base 416, supported and fixed by the connecting beam 2. Neither the high-voltage output electrode base 416 nor the high-voltage output busbar 414 is prone to shaking or displacement, ensuring the stability of the output end of the high-voltage output busbar 414 during connection and fixation.

[0098] In the above embodiment, the output terminals of the high-voltage output bus 414 and the low-voltage output bus 406 are respectively connected to two connecting beams 2, which is beneficial to the stability of the output terminals of the high-voltage output bus 414 and the low-voltage output bus 406, thereby facilitating the stable output of high and low voltages of the cell stack 1.

[0099] See Figures 3 to 8 In some alternative embodiments, some adjacent two cell stacks 1 have a second connecting tab 14. The electrical components include a first bracket 407 and a second connecting bus 408. The first bracket 407 is positioned and assembled on the side plate assembly 3. The second connecting bus 408 is mounted on the first bracket 407 and connected to the second connecting tab 14. The second connecting bus 408 is also connected to another second connecting bus 408 connected to an adjacent cell stack 1.

[0100] Optionally, the second connecting bus 408 includes a copper bar.

[0101] Optionally, the first bracket 407 includes a plastic bracket.

[0102] Optionally, the electrical assembly also includes a connecting base 409, which is mounted on the connecting beam 2. Second connecting buses 408 connected to the adjacent ends of two adjacent cell stacks 1 are fixed and connected to the connecting base 409 to achieve series-parallel connection of the two adjacent cell stacks 1. Further, the top of the connecting beam 2 is provided with a first mounting groove 21, and the connecting base 409 is snapped into and fixed to the first mounting groove 21. Two second connecting buses 408 connecting two adjacent cell stacks 1 are bent towards each other and placed on the connecting base 409, and fixed by a fifth locking member 75, which includes bolts.

[0103] Specifically, during the assembly process, the connecting electrode base 409 is fixed on the connecting beam 2, and the second connecting bus 408 is fixed on the side plate section 31 through the first bracket 407. After the side plate section 31 and the connecting beam 2 are assembled in place, the second connecting bus 408 is welded and fixed to the second connecting electrode tab 14 of the cell stack 1. The second connecting bus 408, which is supported and fixed by the side plate section 31, is connected to the connecting electrode base 409, which is supported and fixed by the connecting beam 2. The connecting electrode base 409 and the second connecting bus 408 are not easy to shake or shift in position, which ensures the stability of the second connecting bus 408 and the connecting electrode base 409 when connected by the fifth locking member 75.

[0104] In the above embodiment of the battery cell module, the connecting electrode base 409 and the first bracket 407 connected to the second connecting bus 408 are respectively fixed on the connecting beam 2 and the side plate section 31. The connecting beam 2 and the side plate section 31 provide support for the connecting electrode base 409 and the second connecting bus 408 respectively. The connecting electrode base 409 and the second connecting bus 408 are not prone to positional displacement, the structure is stable, and it is beneficial to the series and parallel connection between the battery cell stack 1.

[0105] See Figure 17 and Figure 18 In some alternative embodiments, some adjacent cell stacks 1 have a third connecting tab 18. The electrical components include a second bracket 417 and a third connecting bus 418. The second bracket 417 is located between the cell stack 1 and the connecting beam 2 and is mounted on the connecting beam 2. The third connecting bus 418 is fixed on the second bracket 417 and connected to the third connecting tab 18. The third connecting bus 418 is also connected to another third connecting bus 418 connected to an adjacent cell stack 1.

[0106] Optionally, the third connection bus 418 includes a copper bar.

[0107] Optionally, the second bracket 417 includes a plastic bracket. Furthermore, the second bracket 417 is riveted and / or embedded to the connecting beam 2, resulting in a simple, convenient, and reliable connection.

[0108] Optionally, the electrical assembly also includes a connecting electrode base 409, which is fixed to the connecting beam 2. A third connecting busbar 418, connected to the adjacent ends of two adjacent cell stacks 1, is connected and fixed to the connecting electrode base 409 via a fifth locking member 75. The connecting electrode base 409 is snapped into the connecting beam 2, and the fifth locking member 75 includes a bolt. Furthermore, the top of the connecting beam 2 is provided with a first mounting groove 21, and the connecting electrode base 409 is snapped into the first mounting groove 21, making the connection simple and convenient.

[0109] In the above embodiment of the battery cell module, the connection between the second bracket 417 and the connecting beam 2 is simple, convenient and reliable. The connecting beam 2 provides stable support and limit for the second bracket 417, so that the third connecting busbar 418 is not easy to shift, which helps to reduce assembly difficulty and improve assembly effect.

[0110] See Figure 1 , Figure 2 , Figure 19 and Figure 20 In some alternative embodiments, the present invention also provides a battery pack 200, including a cell assembly module 100 as in any of the above embodiments and a plate-shaped lower housing 52, wherein a side plate assembly 3 is connected to the lower housing 52 to mount the cell stack 1 on the lower housing 52.

[0111] Optionally, a portion of the lower housing 52 protrudes in the direction away from the battery cell module 100 to form a receiving cavity 521, in which the battery cell module 100 is installed.

[0112] Optionally, the side panel assembly 3 can be connected and fixed to the lower housing 52 by a sixth locking member 76, which includes bolts.

[0113] Optionally, the battery pack 200 also includes an upper cover 51, which is sealed to the lower housing 52 to define an installation space for accommodating the battery cell stack 1. The installation space is filled with coolant that submerges the battery cell stack 1. Furthermore, the outer shell formed by the connection of the upper cover 51 and the lower housing 52 is provided with an inlet and an outlet. Coolant is filled into the installation space from the inlet until it flows out from the outlet, so that the coolant fills the installation space completely. The battery cell stack 1 in the installation space is completely submerged in the coolant, achieving immersion cooling with good cooling effect.

[0114] Optionally, the battery pack 200 contains only one cell module 100. The assembled cell module 100 can be directly installed into the lower casing 52 of the battery pack 200, simplifying the subsequent installation steps and making the installation simple and efficient.

[0115] During assembly, the side plate section 31 of the side plate assembly 3 is connected to the connecting beam 2 to clamp and fix the corresponding cell stack 1. The electrical components are integrated and fixed on the frame formed by the side plate assembly 3 and the connecting beam 2. The assembled cell module 100 is installed on the lower housing 52, and the upper cover 51 is installed. The upper cover 51 is sealed to the lower housing 52 to define the installation space. Coolant is poured into the installation space, and the coolant immerses the cell stack 1 to achieve immersion cooling, thus completing the final assembly.

[0116] In the battery pack of the above embodiment, the side plate group 3 and the connecting beam 2 in the cell assembly module cooperate to clamp and fix the cell stack 1, so that there is no need to set additional beam structures on the outer periphery of the plate-shaped lower box 52 to fasten the cell stack 1, which is beneficial to simplify the structure, reduce weight and reduce cost. In addition, the electrical components are integrated on the frame formed by the side plate group 3 and the connecting beam 2. After the cell assembly module 100 is assembled, it can be directly installed on the lower box 52 of the battery pack 200. It is not necessary to install the cell stack 1 and electrical components such as the slave control board 401 separately in the lower box 52. The structure is simple and the installation operation is simple and convenient, which is beneficial to simplify the installation steps.

[0117] See Figure 21 In some alternative embodiments, the present invention also provides an electrical device, including the battery cell module 100 as described in any of the above embodiments.

[0118] Optionally, the electrical device includes a vehicle 300, the bottom of which has an installation space 301. The battery cell module 100 is installed within the installation space 301 to form the vehicle's power supply module. Furthermore, the vehicle 300 has a chassis with the installation space 301. The battery cell module 100 can be connected to the chassis, allowing it to be directly installed within the chassis's installation space 301. This design is simple, compact, and improves space utilization.

[0119] Optionally, the number of battery cell module 100 in the electrical device is one. The assembled battery cell module 100 can be directly installed into the installation space 301 of the electrical device. The overall structure of the battery cell module 100 does not require secondary assembly, which simplifies the subsequent installation steps and makes the installation simple and efficient.

[0120] The battery cell module, battery pack, and electrical device of this utility model, with the side plate assembly 3 and connecting beam 2 working together to provide pre-tightening force to secure multiple battery cell stacks 1, makes the side plate assembly 3, connecting beam 2, and multiple battery cell stacks 1 form a whole, which helps to improve the rigidity of the overall structure and can meet the transportation requirements under pressure. The electrical components are integrated and fixed on the side plate assembly 3 and / or connecting beam 2, which improves the integration level of the overall structure, meets the transportation requirements, simplifies the subsequent overall packaging and installation steps, and helps to improve production efficiency.

[0121] In the description of this specification, the references to terms such as "this embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery cell assembly module, characterized in that, include: Multiple battery cell stacks are arranged along a first direction, and each battery cell stack includes multiple battery cells stacked along a second direction. A connecting beam is arranged between two adjacent battery cell stacks; Two side plate assemblies are distributed on both sides of the cell stack along the second direction, and the side plate assemblies are connected to the connecting beam to clamp and fix the cell stack. Electrical components, which are integrated and fixed to the connecting beam and / or the side plate assembly.

2. The cell assembly module according to claim 1, characterized in that, Each of the side plate groups includes multiple side plate segments distributed along the first direction and detachably connected, with the side plate segments located on both sides of the same cell stack being detachably connected to the two ends of the corresponding connecting beam.

3. The battery cell module according to claim 2, characterized in that, Multiple side plate segments of the same side plate group correspond one-to-one with multiple battery cell stacks. When the two side plate segments located on both sides of the battery cell stack are connected to the connecting beam, the battery cell stack is clamped and fixed along the second direction.

4. The cell assembly module according to claim 2, characterized in that, The side plate segment has a first connecting portion, and two adjacent first connecting portions of two adjacent side plate segments in the same side plate group are stacked along the second direction and connected and locked with the connecting beam.

5. The cell assembly module according to claim 4, characterized in that, One of the two overlapping first connecting parts has an L-shaped cross-section, while the other has an inverted L-shaped cross-section that fits and conforms to the L-shaped structure.

6. The cell assembly module according to claim 1, characterized in that, The electrical components include a battery management system and a sampling element. The battery management system includes multiple slave control boards, which are mounted and fixed on the side plate assembly and are electrically connected to multiple battery cell stacks through the sampling element.

7. The cell assembly module according to claim 6, characterized in that, The side plate group includes multiple side plate segments distributed along the first direction and detachably connected. Each of the multiple side plate segments in the same side plate group corresponds to a cell stack. Each side plate segment is equipped with a slave control board, which is electrically connected to the corresponding cell stack through the sampling element.

8. The cell assembly module according to claim 6, characterized in that, The side plate assembly has a groove, the slave control plate is installed in the groove, and the outer wall of the slave control plate is lower than or flush with the groove opening.

9. The cell assembly module according to claim 8, characterized in that, The groove is disposed on the outer side of the side plate assembly opposite to the cell stack and extends through the top of the side plate assembly in a third direction. The top of the slave control plate does not protrude from the top of the side plate assembly, and the sidewall of the slave control plate does not protrude from the outer sidewall of the side plate assembly.

10. The cell assembly module according to claim 6, characterized in that, The control panel is fixed to the side panel assembly by snap-fit ​​or bolt connection.

11. The cell assembly module according to claim 1, characterized in that, Two adjacent cell stacks have a first connecting tab. The electrical component includes a bridging bus and a first connecting bus. The first connecting bus is connected to the first connecting tab. The projections of the first connecting buses connected to the first connecting tabs of two adjacent cell stacks in the first direction are staggered and connected and fixed to the connecting beam through the bridging bus.

12. The cell assembly module according to claim 1, characterized in that, Some of the cell stacks have low-voltage output tabs. The electrical components include a low-voltage busbar bracket and a low-voltage output busbar. The low-voltage busbar bracket is positioned and mounted on the side plate assembly. The low-voltage output busbar is mounted on the low-voltage busbar bracket and connected to the low-voltage output tab.

13. The cell assembly module according to claim 12, characterized in that, Some of the battery cell stacks have high-voltage output tabs. The electrical components include a high-voltage busbar bracket and a high-voltage output busbar. The high-voltage output busbar is mounted on the high-voltage busbar bracket, and the connection end of the high-voltage output busbar is connected to the high-voltage output tab.

14. The cell assembly module according to claim 13, characterized in that, The low-voltage output bus and the high-voltage output bus are respectively located on both sides of the battery cell module in the first direction. The high-voltage output bus is adapted to output high voltage, and the low-voltage output bus is adapted to output low voltage.

15. The cell assembly module according to claim 14, characterized in that, A connecting beam, forming an end beam, is arranged on the side of the cell stack located away from its adjacent cell stack. The connecting beam is connected to the end of the side plate assembly. The high-voltage output bus and the low-voltage output bus are respectively insulatedly connected to the two connecting beams on both sides.

16. The cell assembly module according to claim 1, characterized in that, Two adjacent cell stacks have a second connection tab. The electrical component includes a first bracket and a second connection bus. The first bracket is positioned and mounted on the side plate assembly. The second connection bus is mounted on the first bracket and connected to the second connection tab. The second connection bus is also connected to another second connection bus connected to an adjacent cell stack.

17. The cell assembly module according to claim 1, characterized in that, Two adjacent cell stacks have a third connecting tab. The electrical component includes a second bracket and a third connecting bus. The second bracket is located between the cell stack and the connecting beam and is mounted on the connecting beam. The third connecting bus is fixed to the second bracket and connected to the third connecting tab. The third connecting bus is also connected to another third connecting bus on an adjacent cell stack.

18. The cell assembly module according to claim 1, characterized in that, The battery cells include pouch cells.

19. The cell assembly module according to claim 1, characterized in that, The connecting beam, which is formed as an end beam, is arranged on the side of the cell stack located away from its adjacent cell stack, and the ends of the two side plate groups are connected by the end beam; and / or, the ends of the two side plate groups are fastened together by strapping.

20. A battery pack, characterized in that, Includes a cell assembly module as described in any one of claims 1 to 19 and a plate-shaped lower housing, wherein the side plate assembly is connected to the lower housing to mount the cell stack onto the lower housing.

21. The battery pack according to claim 20, characterized in that, The battery pack also includes a top cover, which is sealed to the lower housing to define an installation space for accommodating the battery cell stack, the installation space being filled with coolant that immerses the battery cell stack.

22. The battery pack according to claim 20, characterized in that, A portion of the lower housing protrudes in the direction away from the battery cell module to form a receiving cavity, and the battery cell module is installed in the receiving cavity.

23. An electrical appliance, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 19.

24. The electrical appliance according to claim 23, characterized in that, The electrical device includes a vehicle, the bottom of which has an installation space, and the battery cell module is installed in the installation space.

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