Square bare cell, cell module and vehicle chassis structure

Abstract

The utility model provides a kind of square bare electric core and electric core module and vehicle chassis structure, including the bare electric core body formed using lamination or winding mode, positive pole and negative pole are set on the bare electric core body in the upward or downward and are in the explosion-proof valve of the bottom or upper portion of the bare electric core body;The bare electric core body is overall flat square body structure;The electric core module includes square bare electric core, multifunctional box by injection molding or casting forming, bottom waterway cover plate is set in the bottom of the multifunctional box and is in the upper cover plate of the multifunctional box top;Several electric core placement bin for placing the square bare electric core are opened in the matrix in the multifunctional box;It further includes the heat dissipation water flow passage being set in the inner side of the multifunctional box;The electric core module structure of the application can significantly save space, reduce cost, and ensure the consistency of product, and is not restricted by the number of electric core.

Description

[Technical Field]

[0001] This utility model relates to the field of battery pack cell technology for new energy vehicles, and in particular to a square bare cell, cell module and vehicle chassis structure that can effectively improve manufacturing efficiency, enhance operational reliability and facilitate maintenance. [Background Technology]

[0002] With the increasing global awareness of environmental protection, new energy vehicles are becoming more and more popular as a means of green travel. In terms of specific application effects, compared with traditional vehicles, new energy vehicles not only get rid of dependence on oil, but also have the advantages of no polluting gas emissions during use and protecting the urban environment. At present, China's new energy vehicles are mainly lithium-ion battery vehicles, while fuel cells, lithium metal batteries and other forms of new energy batteries are also being developed.

[0003] As the application of batteries becomes increasingly widespread, the requirements for manufacturing processes and production efficiency of battery packs and new energy chassis are also constantly increasing. However, the existing battery pack manufacturing process is generally quite complex and inefficient, requiring processes such as cell winding, casing, BMS connection, wiring, debugging, and functional testing. After the battery pack is assembled, a series of routine tests are generally required to ensure the quality and performance of the product. These tests cover key aspects such as charge and discharge, internal resistance measurement, capacity testing, overcharge and over-discharge testing, short circuit testing, and overcurrent protection. When there are many individual battery packs, the cost will increase significantly, and if a fault occurs during subsequent application, the repair will also be quite complex and costly.

[0004] For example, the utility model patent with application number CN202121792904.4 and patent title "A Novel Automotive Lithium Battery Pack" specifically discloses a novel automotive lithium battery pack, including a battery box. The battery box includes an upper cover, a lower shell, a battery module, and a battery management system (BMS). The upper cover and the lower shell are detachably connected. An explosion-proof valve is provided on the right outer wall of the lower shell, and a main positive high-voltage connector and a main negative high-voltage connector are sequentially provided on the left outer wall. A communication connector is provided between the main positive high-voltage connector and the main negative high-voltage connector. The battery module is matched and installed inside the lower shell. A BMS bracket is provided on the left side of the battery module, and the BMS is installed on the BMS bracket. An insulating plate is provided on the top of the battery module, and an EVA sponge heat insulation pad is provided on the bottom. A pressure strip is provided above the insulating plate. This utility model is easy to assemble and disassemble, the battery module has a simple structure, good versatility, short charging time, large energy storage capacity, simple assembly process, no pollution to the environment, and is green and environmentally friendly. The battery box is lightweight, has high energy density, good cycle life, and is safe and reliable.

[0005] To better address the problems existing in current technologies, it is necessary to start from multiple aspects such as the preparation and structural design of battery cells and packs, and combine them with related heat dissipation and pressure relief components to improve the production efficiency and operational stability of products, and reduce manufacturing costs. [Utility Model Content]

[0006] The problem with the prior art that this application addresses is:

[0007] Existing battery pack manufacturing processes are generally complex and inefficient, requiring cell winding, casing, BMS connection, wiring, debugging, and functional testing. After battery pack assembly, a series of routine tests are usually required to ensure product quality and performance. These tests cover key aspects such as charge and discharge, internal resistance measurement, capacity testing, overcharge and over-discharge testing, short circuit testing, and overcurrent protection. When there are many individual battery packs, the cost will increase significantly, and if a fault occurs during subsequent application, repair will be quite complex and costly.

[0008] The solution to the technical problem of this utility model is:

[0009] A square bare battery cell is provided, comprising a bare battery cell body formed by stacking or winding, a positive terminal and a negative terminal disposed on the bare battery cell body facing upward or downward, and an explosion-proof valve located at the bottom or top of the bare battery cell body; the bare battery cell body is generally in the form of a flat square structure.

[0010] A battery cell module includes square bare battery cells, a multifunctional housing formed by injection molding or casting, a bottom water channel cover plate disposed at the bottom of the multifunctional housing, and a top cover plate disposed at the top of the multifunctional housing; the multifunctional housing has a plurality of battery cell placement compartments arranged in a matrix for placing the square bare battery cells; the top cover plate matches the top shape of each square bare battery cell, and the top cover plate has electrode connection holes for exposing the positive electrode and the negative electrode; it also includes a heat dissipation water flow channel disposed inside the multifunctional housing; the ends of the multifunctional housing are respectively provided with water inlets and water outlets; the water inlets and water outlets are connected to the heat dissipation water flow channel.

[0011] Preferably, the heat dissipation water flow channel includes a side water flow channel and a bottom water flow channel; the side water flow channels are sequentially and spaced apart between adjacent groups of square bare cells.

[0012] Preferably, the bottom of the multifunctional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple square bare battery cells in the same group; and the explosion-proof valve corresponds to the position of the pressure relief channel; the bottom water flow channel is provided at intervals with each adjacent pressure relief channel.

[0013] Preferably, the battery cell placement compartments of the multifunctional enclosure are opened in the X and Y directions; and the number of battery cell placement compartments in the X direction ranges from 1 to 468; the number of battery cell placement compartments in the Y direction ranges from 1 to 468.

[0014] Preferably, the number of square bare battery cells in the multifunctional enclosure is 1-468; and the number connected in series is 1-468, while the number connected in parallel is 2-32.

[0015] Preferably, the inside of the multifunctional enclosure is also provided with several firewalls for fire protection and isolation; the firewalls are located between two adjacent square bare battery cells.

[0016] Preferably, the length of the multifunctional housing ranges from 1200 to 1600 mm, and the height ranges from 180 to 250 mm. When the cells are connected in series, the positive terminal of the square bare cell corresponds to the negative terminal of its adjacent square bare cell. When the cells are connected in parallel, the positive terminal of the square bare cell corresponds to the positive terminal of its adjacent square bare cell, and the negative terminal of the square bare cell corresponds to the negative terminal of its adjacent square bare cell.

[0017] Preferably, the upper cover plate is an integral plate structure or multiple independent plate structures corresponding to each of the square bare battery cells; it also includes insulating strong magnets disposed on both sides of the square bare battery cells; the insulating strong magnets include strong magnet sheets and thermally conductive silicone pads; the thermally conductive silicone pads wrap the strong magnet sheets; the insulating strong magnets are annular in shape, including circular annular, rectangular annular, or elliptical annular; the insulating strong magnets are connected to the bare battery cell body by adhesive or riveting.

[0018] A vehicle chassis structure includes a battery cell module as described above, a chassis main frame, and a module mounting position disposed inside the chassis main frame for placing the battery cell module; the module mounting position is provided with a water flow connector connected to the water inlet and the water outlet, and a pressure relief connector connected to the pressure relief channel; it also includes a battery control system for electrically controlling the connection with the battery cell module.

[0019] The technical effects achieved by this application in solving the technical problem are as follows:

[0020] Compared with the prior art, the present invention provides a square bare battery cell, a battery cell module, and a vehicle chassis structure. The bare battery cell body is formed by stacking or winding, with positive and negative terminals arranged upward or downward on the bare battery cell body, and an explosion-proof valve located at the bottom or top of the bare battery cell body. The bare battery cell body has a flat square structure, which can significantly save space, reduce costs, ensure product consistency, and is not limited by the number of battery cells. [Image Description]

[0021] Figure 1 This is a schematic diagram of the exploded state structure of a square bare battery cell module according to this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of a square bare battery cell module according to this utility model.

[0023] Figure 3 This is a schematic diagram of the top state structure of a square bare battery cell module according to this utility model.

[0024] Figure 4 This is a schematic diagram of the bottom state structure of a square bare battery cell module according to this utility model.

[0025] Figure 5 This is a schematic diagram of the side structure of a square bare battery cell module according to this utility model.

[0026] Figure 6 This is a three-dimensional structural diagram of a square bare battery cell module in its combined state according to this utility model.

[0027] Figure 7 This is an exploded structural diagram of the vehicle chassis structure corresponding to the square bare battery cell module of this utility model. [Detailed Implementation]

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0030] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] Please see Figures 1 to 7 The present invention provides a square bare battery cell 11, which includes a bare battery cell body formed by stacking or winding, a positive electrode post and a negative electrode post disposed on the bare battery cell body facing upward or downward, and an explosion-proof valve located at the bottom or top of the bare battery cell body; the bare battery cell body is generally in the form of a flat square structure.

[0036] A battery cell module 12 includes square bare battery cells 11, a multi-functional housing 123 formed by injection molding or casting, a bottom water channel cover 122 disposed at the bottom of the multi-functional housing 123, and an upper cover 121 disposed at the top of the multi-functional housing 123; a plurality of battery cell placement compartments for placing the square bare battery cells 11 are arranged in a matrix in the multi-functional housing 123; the upper cover 121 matches the top shape of each square bare battery cell 11, and is provided with electrode connection holes for exposing the positive electrode and the negative electrode respectively; it also includes a heat dissipation water flow channel disposed inside the multi-functional housing 123; the ends of the multi-functional housing 123 are respectively provided with water inlets and water outlets; the water inlets and water outlets are connected to the heat dissipation water flow channel.

[0037] In some other embodiments, the heat dissipation water flow channel includes a side water flow channel and a bottom water flow channel; the side water flow channels are sequentially and spaced apart between adjacent groups of square bare cells.

[0038] The bottom of the multifunctional enclosure 123 is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple square bare battery cells 11 in the same group; and the explosion-proof valve corresponds to the position of the pressure relief channel; the bottom water flow channel is provided at intervals with each adjacent pressure relief channel.

[0039] The battery cell placement compartments of the multifunctional housing 123 are opened in the X and Y directions; and the number of battery cell placement compartments in the X direction ranges from 1 to 468; the number of battery cell placement compartments in the Y direction ranges from 1 to 468.

[0040] The number of square bare cells in the multifunctional enclosure 123 is 1-468; and the number connected in series is 1-468, while the number connected in parallel is 2-32.

[0041] The inner side of the multifunctional enclosure 123 is also provided with several firewalls for fire protection and isolation; the firewalls are located between two adjacent square bare battery cells 11.

[0042] The length of the multifunctional housing 123 ranges from 1200 to 1600 mm; the height ranges from 180 to 250 mm. When the cells are connected in series, the positive terminal of the square bare cell 11 corresponds to the negative terminal of its adjacent square bare cell. When the cells are connected in parallel, the positive terminal of the square bare cell 11 corresponds to the positive terminal of its adjacent square bare cell, and the negative terminal of the square bare cell 11 corresponds to the negative terminal of its adjacent square bare cell.

[0043] The upper cover plate 121 is either an integral plate structure or multiple independent plate structures corresponding to each of the square bare battery cells 11; it also includes insulating strong magnets disposed on both sides of the square bare battery cells 11; the insulating strong magnets include strong magnet sheets and thermally conductive silicone pads; the thermally conductive silicone pads wrap the strong magnet sheets; the insulating strong magnets are in the shape of annular sheets, including circular annular, rectangular annular, or elliptical annular; the insulating strong magnets are connected to the bare battery cell body by adhesive or riveting.

[0044] A vehicle chassis structure 13 includes a battery cell module as described above, a chassis main frame 13, and a module mounting position 131 disposed inside the chassis main frame 13 for placing the battery cell module; the module mounting position is provided with a water flow connector connected to the water inlet and the water outlet, and a pressure relief connector connected to the pressure relief dedicated channel; it also includes a battery control system for electrically controlling the connection with the battery cell module.

[0045] The technical effects achieved by this application in solving the technical problem are as follows:

[0046] Compared with the prior art, the present invention provides a square bare battery cell, a battery cell module, and a vehicle chassis structure 1. The bare battery cell body is formed by stacking or winding, with positive and negative terminals arranged upward or downward on the bare battery cell body, and an explosion-proof valve located at the bottom or top of the bare battery cell body. The bare battery cell body has a flat square structure, which can significantly save space, reduce costs, ensure product consistency, and is not limited by the number of battery cells.

[0047] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A square bare battery cell, characterized in that: It includes a bare cell body formed by stacking or winding, a positive terminal and a negative terminal disposed on the bare cell body facing upward or downward, and an explosion-proof valve located at the bottom or top of the bare cell body; the bare cell body is generally in the shape of a flat square structure.

2. A battery cell module, characterized in that: The device includes the square bare battery cell of claim 1, an insulated multi-functional housing formed by injection molding or casting, a bottom water channel cover plate disposed at the bottom of the multi-functional housing, and a top cover plate disposed at the top of the multi-functional housing; the multi-functional housing has a plurality of battery cell placement compartments arranged in a matrix for placing the square bare battery cells; the top cover plate matches the top shape of each square bare battery cell, and the top cover plate has electrode connection holes for exposing the positive electrode and the negative electrode; it also includes a heat dissipation water flow channel disposed inside the multi-functional housing; the ends of the multi-functional housing are respectively provided with water inlets and water outlets; the water inlets and the water outlets are connected to the heat dissipation water flow channel.

3. A cell module as described in claim 2, characterized in that: The heat dissipation water flow channel includes a side water flow channel and a bottom water flow channel; the side water flow channels are arranged sequentially at intervals between adjacent groups of square bare cells.

4. A cell module as described in claim 3, characterized in that: The bottom of the multi-functional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple square bare battery cells in the same group; and the explosion-proof valve corresponds to the position of the pressure relief channel; the bottom water flow channel is provided at intervals with each adjacent pressure relief channel.

5. A cell module as described in any one of claims 2 to 4, characterized in that: The battery cell placement compartments of the multifunctional enclosure are opened in the X and Y directions; and the number of battery cell placement compartments in the X direction ranges from 1 to 468; the number of battery cell placement compartments in the Y direction ranges from 1 to 468.

6. A battery cell module as described in any one of claims 2 to 4, characterized in that: The number of square bare battery cells in the multifunctional enclosure is 1-468; the number connected in series is 1-468 and the number connected in parallel is 2-32.

7. A cell module as described in any one of claims 2 to 4, characterized in that: The inside of the multifunctional enclosure is also provided with several firewalls for fire protection and isolation; the firewalls are located between two adjacent square bare battery cells.

8. A battery cell module as described in any one of claims 2 to 4, characterized in that: The length of the multifunctional enclosure ranges from 1200 to 1600 mm; the height ranges from 180 to 250 mm. When the enclosure is connected in series, the positive terminal of the square bare battery cell corresponds to the negative terminal of its adjacent square bare battery cell. When the enclosure is connected in parallel, the positive terminal of the square bare battery cell corresponds to the positive terminal of its adjacent square bare battery cell, and the negative terminal of the square bare battery cell corresponds to the negative terminal of its adjacent square bare battery cell.

9. A cell module as described in claim 2, characterized in that: The top cover plate is either an integral plate structure or multiple independent plate structures corresponding to each of the square bare battery cells; it also includes insulating strong magnets disposed on both sides of the square bare battery cells; the insulating strong magnets include strong magnet sheets and thermally conductive silicone pads; the thermally conductive silicone pads wrap the strong magnet sheets; the insulating strong magnets are annular in shape, including circular annular, rectangular annular, or elliptical annular; the insulating strong magnets are connected to the bare battery cell body by adhesive or riveting.

10. A vehicle chassis structure, characterized in that: The system includes a cell module as described in any one of claims 2 to 4, a chassis main frame, and a module mounting position disposed inside the chassis main frame for placing the cell module; the module mounting position is provided with a water flow connector connected to the water inlet and the water outlet, and a pressure relief connector connected to the pressure relief dedicated channel; it also includes a battery control system for electrically controlling the connection with the cell module.

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