Cylindrical bare battery cell, bare battery cell module and vehicle chassis structure

Abstract

The utility model provides a kind of cylindrical bare cell and bare cell module and vehicle chassis structure, including winding formation's bare cell body, set on the bare cell body whole pole and at the bottom or upper portion of the bare cell body explosion-proof valve;The bare cell body is overall cylindrical structure;A kind of bare cell module includes cylindrical bare cell, the multifunctional box of injection molding or casting forming, the bottom waterway cover plate being set in the bottom of the multifunctional box and the upper cover plate being in the top of the multifunctional box;Several cell placement bin for placing the cylindrical bare cell are opened in the matrix in the multifunctional box;It further includes the heat dissipation water flow passage being set in the inside of the multifunctional box;The cell placement bin is honeycomb structure;The bare cell 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 cell.

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 cylindrical bare cell, bare 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 cylindrical bare battery cell is provided, comprising a bare battery cell body formed by winding, a full pole disposed 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 is generally cylindrical in structure.

[0010] A bare battery cell module includes cylindrical 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 cell placement compartments arranged in a matrix for placing the cylindrical bare battery cells; the top cover plate matches the top shape of each cylindrical bare battery cell, and each top cover plate has a terminal connection hole for exposing the full terminal post; 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; the cell placement compartments have a honeycomb structure.

[0011] Preferably, the heat dissipation water flow channel includes a side water flow channel and a bottom water flow channel; the side water flow channel matches the shape of the honeycomb-shaped battery cell placement compartment to form a flow channel structure similar to a corrugated cardboard shell.

[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 cylindrical 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 spaced apart from each adjacent pressure relief channel.

[0013] Preferably, the battery cell placement compartments of the multifunctional housing are densely arranged in a honeycomb structure, including an X-direction arrangement and a Y-direction arrangement inclined at a preset angle to the X-direction; 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 cylindrical bare 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 water inlet and outlet on the outside of the multifunctional box are connected to the X-direction battery cell placement compartments in the Nth and N+2th rows, respectively, so that the liquid can flow smoothly in the flow channel structure.

[0016] Preferably, the length of the multifunctional housing ranges from 1200-1600mm; the height ranges from 180-250mm; the bare cell body includes two process surfaces, each of which has a flattened area and a non-flattened area; the non-flattened area includes a first non-flattened area and a second non-flattened area; the first non-flattened area, the flattened area, and the second non-flattened area are arranged sequentially from the center of the bare cell body outwards; the first non-flattened area and the second non-flattened area are in the same plane as the process surface, and the flattened area is higher than the process surface; the area of ​​the non-flattened area accounts for 20%-50% of the area of ​​the process surface.

[0017] Preferably, the upper cover plate is an integral plate structure or multiple independent plate structures corresponding to each of the cylindrical bare cells; it also includes insulating strong magnets disposed on both sides of the cylindrical bare 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 cell body by adhesive or riveting.

[0018] A vehicle chassis structure includes a bare battery cell module as described above, a chassis main frame, and a module mounting position disposed inside the chassis main frame for placing the bare battery cell module. The module mounting position is provided with a water flow connector communicating with the water inlet and the water outlet, and a pressure relief connector communicating with the pressure relief channel. It also includes a battery control system for electrically controlling the connection with the bare battery cell module. The battery control system includes a battery circuit breaker unit and a battery system interface. The battery circuit breaker unit is detachably connected to the chassis main frame crossbeam and connected in series with multiple bare battery cell modules to turn the vehicle power battery system on or off to output electrical energy. The battery control system interface is integrated within the battery circuit breaker unit for outputting high-voltage current and low-voltage signals.

[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 cylindrical bare battery cell, a bare battery cell module and a vehicle chassis structure by using a bare battery cell body formed by winding, a full pole set 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 is cylindrical in shape, 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 cylindrical bare battery cell module according to this utility model.

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

[0023] Figure 3 This is a perspective view of the cylindrical bare battery cell module according to this utility model.

[0024] Figure 4 This is a schematic diagram of the cylindrical bare battery cell module from another perspective.

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

[0026] Figure 6 This is an exploded structural diagram of the vehicle chassis structure corresponding to the cylindrical bare battery cell module of this utility model. [Detailed Implementation]

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please see Figures 1 to 6 The present invention provides a cylindrical bare battery cell 11 comprising a bare battery cell body formed by winding, a full pole disposed 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 is generally cylindrical in structure.

[0035] A bare battery cell module includes a cylindrical bare battery cell 11, a multifunctional housing 123 formed by injection molding or casting, a bottom water channel cover 122 disposed at the bottom of the multifunctional housing 123, and an upper cover 121 disposed at the top of the multifunctional housing 123; a plurality of cell placement compartments for placing the cylindrical bare battery cells 11 are arranged in a matrix in the multifunctional housing 123; the upper cover 121 matches the top shape of each cylindrical bare battery cell 11, and each of the upper cover 121 has a terminal connection hole for exposing the full terminal; it also includes a heat dissipation water flow channel disposed inside the multifunctional housing 123; the ends of the multifunctional housing 123 are respectively provided with a water inlet and a water outlet; the water inlet and the water outlet are connected to the heat dissipation water flow channel; the cell placement compartment has a honeycomb structure.

[0036] 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 channel matches the shape of the honeycomb-shaped cell placement compartment to form a flow channel structure that approximates a corrugated cardboard shell.

[0037] 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 cylindrical bare 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.

[0038] The battery cell placement compartments of the multifunctional housing 123 are densely arranged in a honeycomb structure, including an X-direction arrangement and a Y-direction arrangement at a preset angle to the X-direction; 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.

[0039] The number of cylindrical bare cells in the multifunctional enclosure 123 is 1-468; the number connected in series is 1-468 and the number connected in parallel is 2-32.

[0040] The inlet and outlet of the multifunctional box 123 are connected to the X-direction battery cell placement compartments of the Nth and N+2th rows, respectively, so that the liquid can flow smoothly in the flow channel structure.

[0041] The length of the multifunctional housing 123 ranges from 1200 to 1600 mm, and the height ranges from 180 to 250 mm. The bare cell body includes two process surfaces, each of which has a flattened area and a non-flattened area. The non-flattened area includes a first non-flattened area and a second non-flattened area. The first non-flattened area, the flattened area, and the second non-flattened area are arranged sequentially from the center of the bare cell body outwards. The first non-flattened area and the second non-flattened area are in the same plane as the process surface, and the flattened area is higher than the process surface. The area of ​​the non-flattened area accounts for 20%-50% of the area of ​​the process surface.

[0042] The upper cover plate 121 is either an integral plate structure or multiple independent plate structures corresponding to each of the cylindrical bare cells 11; it also includes insulating strong magnets disposed on both sides of the cylindrical bare 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 annular in shape, including circular annular, rectangular annular, or elliptical annular; the insulating strong magnets are connected to the bare cell body by adhesive or riveting.

[0043] A vehicle chassis structure includes a bare 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 bare battery cell module. The module mounting position 131 is provided with a water flow connector communicating with the water inlet and the water outlet, and a pressure relief connector communicating with the pressure relief channel. It also includes a battery control system for electrically controlling the connection with the bare battery cell module. The battery control system includes a battery circuit breaker unit and a battery system interface. The battery circuit breaker unit is detachably connected to the crossbeam of the chassis main frame 13 and connected in series with multiple bare battery cell modules to turn the vehicle power battery system on or off to output electrical energy. The battery control system interface is integrated within the battery circuit breaker unit for outputting high-voltage current and low-voltage signals.

[0044] The technical effects achieved by this application in solving the technical problem are as follows:

[0045] Compared with the prior art, the present invention provides a cylindrical bare battery cell, a bare battery cell module and a vehicle chassis structure 1, which adopts a bare battery cell body formed by winding, a full pole set 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 is cylindrical in shape, which can significantly save space, reduce costs, ensure product consistency and is not limited by the number of battery cells.

[0046] 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 cylindrical bare battery cell, characterized in that: It includes a bare cell body formed by winding, a full pole set on the bare cell body, and an explosion-proof valve located at the bottom or top of the bare cell body; the bare cell body is generally cylindrical in structure.

2. A bare battery cell module, characterized in that: The device includes the cylindrical 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 cell placement compartments arranged in a matrix for placing the cylindrical bare battery cells; the top cover plate matches the top shape of each cylindrical bare battery cell, and the top cover plate is provided with electrode connection holes for exposing the full electrode posts; 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 water outlets are connected to the heat dissipation water flow channel; the cell placement compartments have a honeycomb structure.

3. A bare 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 channel matches the shape of the honeycomb-shaped battery cell placement compartment, forming a flow channel structure similar to a corrugated paper shell.

4. A bare 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 cylindrical 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 bare 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 densely arranged in a honeycomb structure, including an X-direction arrangement and a Y-direction arrangement at a preset angle to the X-direction; 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 bare cell module as described in any one of claims 2 to 4, characterized in that: The number of cylindrical bare 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 bare cell module as described in claim 5, characterized in that: The inlet and outlet on the outside of the multifunctional box are connected to the X-direction battery cell placement compartments in the Nth and N+2th rows, respectively, so that the liquid can flow smoothly in the flow channel structure.

8. A bare cell module as described in any one of claims 2 to 4, characterized in that: The length of the multifunctional housing ranges from 1200-1600mm; the height ranges from 180-250mm; the bare cell body includes two process surfaces, each of which has a flattened area and a non-flattened area; the non-flattened area includes a first non-flattened area and a second non-flattened area; the first non-flattened area, the flattened area, and the second non-flattened area are arranged sequentially from the center of the bare cell body outwards; the first non-flattened area and the second non-flattened area are in the same plane as the process surface, and the flattened area is higher than the process surface; the area of ​​the non-flattened area accounts for 20%-50% of the area of ​​the process surface.

9. A bare cell module as described in claim 2, characterized in that: The upper cover plate is either an integral plate structure or multiple independent plate structures corresponding to each of the cylindrical bare cells; it also includes insulating strong magnets disposed on both sides of the cylindrical bare 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 cell body by adhesive or riveting.

10. A vehicle chassis structure, characterized in that: The system includes a bare 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 bare cell module; the module mounting position is provided with a water flow connector communicating with the water inlet and the water outlet, and a pressure relief connector communicating with the pressure relief dedicated channel; it also includes a battery control system for electrically controlling the conduction of the bare cell module; the battery control system includes a battery circuit breaker unit and a battery system interface; the battery circuit breaker unit is detachably connected to the chassis main frame crossbeam and connected in series with multiple bare cell modules for turning on or off the output of electrical energy from the vehicle power battery system; the battery control system interface is integrated in the battery circuit breaker unit for outputting high-voltage current and low-voltage signals.

Images