Battery cell group module, battery pack and power utilization device

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a battery cell group module, a battery pack and an electric device. 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 arranged along a second direction; the connecting beams are arranged at the two ends, distributed in the first direction, of the battery cell stacking body; the two side plate groups are distributed on the two sides of the battery cell stacking bodies in the second direction, each side plate group comprises a plurality of side plate sections which are distributed in the first direction and are detachably connected, and the side plate sections located on the two sides of the same battery cell stacking body are detachably connected with the connecting beams located at the two ends of the corresponding battery cell stacking body and clamp and fix the battery cell stacking bodies during connection; and hoisting holes are formed in the connecting beams and / or the side plate sections. The side plate sections and the connecting beams are assembled flexibly, the space utilization rate can be increased, the lifting appliance can be directly connected and matched with the lifting holes to achieve lifting and transferring, and lifting and transferring are convenient.

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] Currently, with the increasingly widespread application of batteries, the demand for electricity is becoming more diversified, often requiring the combination of multiple cell stacks to meet power needs, and the requirements for space utilization are also gradually increasing. In particular, the module-free integration technology of soft-pack CTP (cell to pack) directly integrates and fixes the cell stacks to the battery pack. The cell stacks do not have upper and lower cover plates, making the overall hoisting and transportation of the cell stacks difficult. 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 cell assembly module, a battery pack, and an electrical device to solve the problem of difficult transfer of cell stacks in the prior art.

[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] Multiple connecting beams are provided at both ends of each of the cell stacks distributed along the first direction;

[0007] Two side plate assemblies are distributed along the second direction on both sides of the cell stack. Each side plate assembly includes multiple side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the connecting beams located at both ends of the corresponding cell stack, and clamp and fix the cell stack when connected. The connecting beams and / or the side plate segments are provided with lifting holes.

[0008] Optionally, the bottom of the connecting beam is provided with a support structure, and both ends of the battery cell stack are respectively supported by the support structure of the corresponding connecting beam.

[0009] Optionally, the connecting beam located between two adjacent cell stacks among the plurality of connecting beams is an intermediate beam, and the cross-section of the intermediate beam has an inverted T-shaped structure.

[0010] Optionally, the connecting beam that connects to the end of the side plate assembly among the plurality of connecting beams is an end beam, and the cross-section of the end beam has an L-shaped structure.

[0011] Optionally, the lifting hole includes a threaded hole, the connecting beam is provided with a plurality of threaded holes distributed along the second direction, and the side plate segment is provided with a plurality of threaded holes distributed along the first direction and penetrating the side plate segment along a third direction.

[0012] Optionally, at least some of the lifting holes are configured as connection and fixing holes, which are used to fix the battery cell module.

[0013] Optionally, the side plate segment is fixed to the connecting beam by bolts.

[0014] Optionally, the cell assembly module further includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted and fixed on the side plate segment, and the slave control boards are electrically connected to the cell stack body corresponding to the side plate segment.

[0015] Optionally, the battery cell includes a pouch cell.

[0016] 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. The cell assembly module is placed on the lower housing and is connected and fixed to the lower housing through a first locking member passing through the lifting hole.

[0017] Optionally, the battery pack further includes a top cover, which is sealed to the lower housing to define an installation space for accommodating the cell assembly module, the installation space being filled with coolant that immerses the cell stack.

[0018] 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.

[0019] 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.

[0020] As described above, the battery cell module, battery pack, and power supply device of this utility model have at least the following beneficial effects: multiple side plate segments are detachably connected to the connecting beam to provide clamping force for fixing the battery cell stack, which not only makes the battery cell stack less likely to fall off and scatter during transportation, facilitating transportation, but also allows for flexible setting of the number of side plate segments according to needs, thereby facilitating flexible adjustment of the space accommodating the battery cell stack according to the number of battery cell stacks, making assembly flexible, which is conducive to improving space utilization and reducing costs; based on this, lifting holes are provided on the connecting beam and / or side plate segments, which can be directly connected and cooperated with lifting tools through the lifting holes on the connecting beam or side plate segments to realize the lifting and transportation of the battery cell stack, which is conducive to simplifying the structure and further improving space utilization. Attached Figure Description

[0021] Figure 1 This is a first-view structural schematic diagram of an embodiment of the battery cell assembly module of this utility model;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0023] Figure 3 for Figure 1 A structural diagram of multiple connecting beams;

[0024] Figure 4 for Figure 1 Structural diagram of the middle beam;

[0025] Figure 5 for Figure 1 Schematic diagram of the middle beam;

[0026] Figure 6 for Figure 1 A structural schematic diagram of the CNEDC core module from a second perspective;

[0027] Figure 7 for Figure 1 Schematic diagram of the connection structure between the cell assembly module and the lifting device;

[0028] Figure 8 for Figure 7 A magnified schematic diagram of part B in the middle;

[0029] Figure 9 for Figure 7 A partial sectional view of the battery cell assembly module and the lifting device;

[0030] Figure 10 for Figure 9 A magnified schematic diagram of part C in the middle;

[0031] Figure 11 for Figure 9 A magnified schematic diagram of part D in the middle;

[0032] Figure 12 This is a schematic diagram of the structure of an embodiment of the battery pack of this utility model;

[0033] Figure 13 for Figure 12 A schematic diagram of the explosion of the battery pack;

[0034] Figure 14 This is a simplified structural diagram of an embodiment of the electrical device of this utility model.

[0035] Part Number Explanation

[0036] Cell module 100, cell stack 1, cell 11, connecting beam 2, bottom support structure 21, side plate assembly 3, side plate section 31, lifting hole 4, lifting tool 5, lifting plate 51, lifting ring 52, second locking component 53, bolt 6, slave control board 71, lower housing 8, first locking component 81, top cover 9, battery pack 200, vehicle 300, installation space 301. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] See Figure 1 , Figure 2 , Figures 5 to 7 In some optional embodiments, this utility model provides a battery cell assembly module, which includes multiple battery cell stacks 1, multiple connecting beams 2, and two side plate assemblies 3. 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. Connecting beams 2 are arranged at both ends of each battery cell stack 1 distributed along the first direction. The two side plate assemblies 3 are distributed along the second direction on both sides of the battery cell stack 1. Each side plate assembly 3 includes multiple side plate segments 31 distributed along the first direction and detachably connected. The side plate segments 31 located on both sides of the same battery cell stack 1 are detachably connected to the connecting beams 2 located at both ends of the corresponding battery cell stack 1, and clamp and fix the battery cell stack 1 during connection. That is, the side plate segments 31 located around the same battery cell stack 1 and the connecting beams 2 are interconnected to provide a pre-tightening force to fix the battery cell stack 1, which helps to prevent the battery cell stack 1 from falling off and scattering. The connecting beam 2 and / or the side plate section 31 are provided with lifting holes 4. The lifting holes 4 can be used to connect and cooperate with the lifting device 5 to lift the connecting beam 2 and / or the side plate section 31, thereby realizing the overall lifting and transportation of the battery cell module.

[0040] In this application, the first direction is perpendicular to the second direction. Specifically, the arrangement direction of the multiple 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 cell stack 1, and the length direction of the cell 11 are the same as the first direction, i.e., the X direction in the figures; the arrangement direction of the multiple cells 11 in each 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 cell stack 1, and the thickness direction of the cell 11 are the same as the second direction, i.e., the Y direction in the figures.

[0041] Optionally, multiple side plate segments 31 of the same side plate group 3 correspond one-to-one with multiple battery cell stacks 1. That is, each battery cell stack 1 has an independent side plate segment 31 arranged on each side along the second direction. The assembly is simple and flexible, and 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 to meet different charge requirements and facilitate universal setting. The side plate segment 31 can be an aluminum profile, injection molded part or die casting part. The side plate segment 31 has a first connecting part corresponding to the connecting beam 2. The first connecting part and the connecting beam 2 can be fixed by bolts 6, which is simple and convenient to disassemble and assemble, and the connection is reliable.

[0042] Optionally, the battery cell 11 includes a pouch cell. The two ends of the battery cell 11 distributed along the first direction have tabs, or in other words, the two ends of the battery cell stack 1 distributed along the first direction are tab ends. There is a gap between the connecting beam 2 and the tab ends of the battery cell stack 1. That is, the length of the side plate segment 31 is greater than the length of the battery cell stack 1, so that the connecting beam 2 does not contact the tab ends of the battery cell stack 1. This helps to avoid squeezing the tab ends and affecting the performance of the battery cell stack 1, and also helps to ensure insulation. The side plate segments 31 located on both sides of the same battery cell stack 1 cooperate to clamp and fix the battery cell stack 1 along the second direction. The two sides of the battery cell 11 distributed along the second direction are the sides with the largest surface area of ​​the battery cell 11. The cooperation of the two side plate segments 31 to clamp the sides with the largest surface area of ​​the battery cell 11 helps to improve the stability of the overall structure.

[0043] In the above embodiment, the battery cell assembly module 100, with the side plate assembly 3 cooperating with the connecting beam 2, can provide pre-tightening force to clamp the battery cell stack 1 to fix the battery cell stack 1. The structure is stable, and the multiple battery cells 11 of the battery cell stack 1 are not easy to fall off and scatter. There is no need to assemble additional support plates to support the battery cell stack 1. Moreover, the connecting beam 2 and the side plate section 31 are provided with lifting holes 4 that can be connected and cooperate with the lifting device 5. The transportation needs can be met without the need for additional upper and lower cover plates, which is conducive to simplifying the structure, reducing production processes and reducing costs. In addition, the side plate assembly 3 includes multiple independently set side plate sections 31. The side plate sections 31 can be detachably connected to each other and to the connecting beam 2, which is convenient for flexible assembly according to the number of battery cell stacks 1, avoiding space waste, improving space utilization and further reducing costs.

[0044] See Figures 1 to 11 In some optional embodiments, the bottom of the connecting beam 2 is provided with a bottom support structure 21, and the two ends of the battery cell stack 1 in the first direction are respectively supported by the bottom support structure 21 of the corresponding connecting beam 2. The bottom support structure 21 can support the battery cell stack 1 in the third direction.

[0045] In this application, the height direction of the cell stack 1, the height direction of the connecting beam 2, the height direction of the side plate segment 31, the height direction of the cell 11 and the third direction are the same, namely the Z direction in the figure.

[0046] Optionally, among the multiple connecting beams 2, the connecting beam 2 located between two adjacent cell stacks 1 is an intermediate beam, and the cross-section of the intermediate beam is an inverted T-shaped structure. The bottom of the intermediate beam is provided with a support structure 21 extending along the first direction on both sides. The two support structures 21 can support two adjacent cell stacks 1 respectively. That is to say, one intermediate beam can support two adjacent cell stacks 1 at the same time, which helps to simplify the structure and improve space utilization.

[0047] Optionally, among the multiple connecting beams 2, the connecting beam 2 that connects to the end of the side plate assembly 3 is an end beam, and the end beam has an L-shaped cross-section. Furthermore, there are two end beams, which are distributed on both sides of the cell assembly module 100 in the first direction.

[0048] Optionally, the lifting holes 4 include threaded holes. The connecting beam 2 has multiple threaded holes distributed along the second direction, and the side plate section 31 has multiple threaded holes distributed along the first direction and penetrating the side plate section 31 along the third direction. With multiple lifting holes 4 on the connecting beam 2 and the side plate section 31, the force is evenly and reliably distributed during lifting, which helps to improve the stability of lifting and transportation. Specifically, the lifting device 5 includes a lifting plate 51 and a lifting ring 52. The lifting ring 52 is set on the lifting plate 51. The hook used to lift the battery cell module 100 hooks onto the lifting ring 52, so that the battery cell module 100 can be lifted and transported. The lifting plate 51 is provided with multiple connecting holes, which correspond to the lifting holes 4. The lifting plate 51 covers the top of the battery cell module 100. The connecting holes are aligned with the lifting holes 4 and are connected and locked by a second locking member 53. The second locking member 53 includes a bolt. The second locking member 53 passes through the connecting holes and the lifting holes 4 to achieve the connection and locking of the lifting plate 51 with the connecting beam 2 and the connection and locking of the lifting plate 51 with the side plate section 31.

[0049] Optionally, at least some of the lifting holes 4 are constructed as connection and fixing holes, which are used to fix the battery cell module 100. The lifting holes 4 can be used to cooperate with the lifting device 5 to lift and transport the battery cell module 100, and can also be used to install and fix the battery cell module 100. This multi-purpose hole helps to simplify the structure of the battery cell module 100, reduce the number of parts, and thus improve space utilization. That is, after the lifting and transport is completed, the battery cell module 100 can be directly fixed in the corresponding position through the lifting holes 4.

[0050] The battery cell module 100 in the above embodiment has a bottom support structure 21 in the middle beam. The bottom support structure 21 can support the battery cell stack 1, making the structure of the battery cell stack 1 more stable. This helps to ensure that the battery cell stack 1 will not fall off and scatter during hoisting, reducing the difficulty of hoisting and transportation, and further improving the stability of the overall structure of the battery cell module 100 during hoisting and transportation.

[0051] See Figure 12 In some alternative embodiments, the cell assembly module 100 may further include a battery management system (BMS), which includes a main control board and multiple slave control boards 71. The multiple slave control boards 71 ​​are mounted and fixed on the side plate section 31 and are electrically connected to the cell stack 1 corresponding to the side plate section 31.

[0052] Optionally, each side panel segment 31 is equipped with a slave control board 71, which is electrically connected to the corresponding cell stack 1 to diagnose and control the cell stack 1 based on the voltage signals of the multiple cells 11 in the cell stack 1. Furthermore, the main control board is connected to multiple slave control boards 71. The slave control boards 71 ​​can acquire the voltage signals of the cells 11 through a flexible printed circuit (FPC), and the main control board diagnoses and controls each cell 11 separately through the multiple slave control boards 71.

[0053] The battery cell module 100 in the above embodiment can be assembled into a battery pack without a casing, so that it can be directly installed and used in the future, which helps to simplify the subsequent installation and use process.

[0054] See Figure 12 and Figure 13 In some alternative embodiments, the present invention provides a battery pack 200, which includes a cell assembly module 100. In addition to the aforementioned components, the battery pack 200 may also include an upper cover 9 and a plate-shaped lower housing 8. The cell assembly module 100 is connected to the lower housing 8 via a first locking member 81 to mount the cell assembly module 100 onto the lower housing 8. The upper cover 9 is sealed to the lower housing 8 to define an installation space for accommodating the cell assembly module 100, and the installation space is filled with coolant that submerges the cell stack 1.

[0055] Optionally, when the cell assembly module 100 is installed on the lower housing 8 of the battery pack 200, the cell assembly module 100 is placed on the lower housing 8, and the first locking member 81 passes through the lifting hole 4 on the side plate section 31 and is connected and fixed to the lower housing 8. The first locking member 81 includes bolts. The side plate assembly 3 and the connecting beam 2 in the cell assembly module 100 cooperate to 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 housing 8 to fasten the cell stack 1, which helps to simplify the structure, reduce weight and reduce cost.

[0056] Optionally, the outer shell formed by the connection of the upper cover 9 and the lower housing 8 is provided with a liquid inlet and a liquid outlet. The coolant is filled into the installation space from the liquid inlet until the coolant flows out from the liquid outlet, so that the coolant fills the installation space and the battery cell stack 1 in the installation space is completely immersed in the coolant, achieving immersion cooling with good cooling effect.

[0057] Optionally, the battery pack 200 contains only one cell module 100. The assembled cell module 100 can be directly installed into the lower casing 8 of the battery pack 200, simplifying the subsequent installation steps and making the installation simple and efficient.

[0058] For details, see Figure 13During the assembly process, 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 slave control board 71 of the battery management system is fixed on the side plate section 31 and electrically connected to the corresponding cell stack 1. After the cell assembly module 100 is assembled, the assembled cell assembly module 100 is placed on the lower housing 8 by the lifting tool 5. The side plate section 31 is connected and fixed to the lower housing 8 to fix the cell assembly module 100. The upper cover 9 is installed and sealed to the lower housing 8 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.

[0059] After the battery pack 200 and the cell module 100 in the above embodiment are assembled, they can be directly installed on the lower housing 8 of the battery pack. It is not necessary to install the cell stack 1 and electrical structural components such as the control board 71 separately in the lower housing 8. The structure is simple and the installation operation is simple and convenient.

[0060] See Figure 1 and Figure 14 In some alternative embodiments, the present invention provides an electrical device that includes a battery cell module 100.

[0061] 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. Further, the vehicle 300 has a chassis with an installation space 301 within it. 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. Specifically, the battery cell module 100 is placed on the chassis, and a first locking member 81 passes through a lifting hole 4 on the side panel section 31 and is connected and fixed to the chassis to secure the battery cell stack 1.

[0062] Optionally, the vehicle contains only one battery cell module 100. 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. In addition, the chassis of the vehicle 300 protects the battery cell module 100, eliminating the need for an additional outer shell to protect the battery cell module 100, which simplifies the structure and helps reduce costs.

[0063] The battery cell module 100, battery pack 200, and power supply device of this utility model are connected and cooperated by the side plate group 3 and the connecting beam 2 to secure the battery cell stack 1. The overall structure is stable and reliable. While meeting transportation requirements, the structure is simplified. Moreover, the connecting beam 2 and the side plate section 31 are provided with lifting holes 4 for hoisting, which facilitates the hoisting and transportation of the battery cell stack 1. The battery cell stack 1 can be hoisted and transported without the need for additional upper and lower cover plates. The simplified structure also reduces the difficulty of hoisting and transporting the battery cell stack 1. In addition, each side plate section 31 of the side plate group 3 is independently detachable. The number of side plate sections 31 can be flexibly set according to the number of battery cell stacks 1, which is flexible in assembly, which helps to improve space utilization and reduce costs.

[0064] 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.

[0065] 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. Multiple connecting beams are provided at both ends of each of the cell stacks distributed along the first direction; Two side plate assemblies are distributed along the second direction on both sides of the cell stack. Each side plate assembly includes multiple side plate segments distributed along the first direction and detachably connected. The side plate segments located on both sides of the same cell stack are detachably connected to the connecting beams located at both ends of the corresponding cell stack, and clamp and fix the cell stack when connected. The connecting beams and / or the side plate segments are provided with lifting holes.

2. The cell assembly module according to claim 1, characterized in that, The bottom of the connecting beam is provided with a support structure, and both ends of the battery cell stack are supported by the support structure of the corresponding connecting beam.

3. The battery cell module according to claim 2, characterized in that, Among the multiple connecting beams, the connecting beam located between two adjacent cell stacks is the intermediate beam, and the cross-section of the intermediate beam has an inverted T-shaped structure.

4. The cell assembly module according to claim 2, characterized in that, Among the multiple connecting beams, the connecting beam that connects to the end of the side plate assembly is an end beam, and the end beam has an L-shaped cross-section.

5. The cell assembly module according to claim 1, characterized in that, The hoisting hole includes a threaded hole. The connecting beam is provided with a plurality of threaded holes distributed along the second direction. The side plate section is provided with a plurality of threaded holes distributed along the first direction and penetrating the side plate section along the third direction.

6. The cell assembly module according to claim 1 or 5, characterized in that, At least a portion of the lifting holes are constructed as connection and fixing holes, which are used to fix the battery cell module.

7. The cell assembly module according to claim 1, characterized in that, The cell assembly module also includes a battery management system, which includes multiple slave control boards. The slave control boards are mounted and fixed on the side plate segment, and the slave control boards are electrically connected to the cell stack body corresponding to the side plate segment.

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

9. A battery pack, characterized in that, Includes a battery cell assembly module as described in any one of claims 1 to 8 and a plate-shaped lower housing, wherein the battery cell assembly module is placed on the lower housing and is connected and fixed to the lower housing by a first locking member passing through the lifting hole.

10. The battery pack according to claim 9, 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 cell assembly module, the installation space being filled with coolant that immerses the cell stack.

11. An electrical appliance, characterized in that, Includes the cell assembly module as described in any one of claims 1 to 8.

12. The electrical appliance according to claim 11, 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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