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

Abstract

The utility model provides a kind of blade bare cell and bare cell module and vehicle chassis structure, including the bare cell body formed using lamination or winding mode, positive pole and negative pole being set on the bare cell body in front or back and the explosion-proof valve being at the bottom or upper portion of the bare cell body;The bare cell body is overall flat long strip shape blade body structure;A kind of bare cell module, including the blade bare cell, multifunctional box by injection molding or casting, cell front cover plate and cell back cover plate;Several cell placement warehouses for placing the blade bare cell are sequentially provided in the multifunctional box;The cell front cover plate, the cell back cover plate and the shape of both ends of each blade bare cell are matched, effectively improve the anti-breaking performance of the blade bare cell, 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 cells.

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 blade 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 blade-shaped 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 forward or backward, 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, elongated blade-shaped structure.

[0010] A bare battery cell module includes the blade-shaped bare battery cell, a multi-functional housing formed by injection molding or casting, a front cover plate of the battery cell located at the front end of the multi-functional housing, and a rear cover plate of the battery cell located at the rear end of the multi-functional housing. A plurality of battery cell placement compartments for placing the blade-shaped bare battery cells are sequentially formed in the multi-functional housing. The front cover plate and the rear cover plate of the battery cell are shaped to match the two ends of each blade-shaped bare battery cell, effectively improving the anti-breakage performance of the blade-shaped bare battery cell. A terminal connection hole for exposing the positive terminal and the negative terminal is formed on the front cover plate or the rear cover plate of the battery cell. The module also includes a heat dissipation water flow channel located inside the multi-functional housing. The front cover plate and the rear cover plate of the battery cell 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.

[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 blade bare cells.

[0012] Preferably, the bottom of the multifunctional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds one-to-one with the position of the bare blade battery cell; and the explosion-proof valve corresponds to the position of the pressure relief channel; the bottom water flow channel is spaced apart from each of the adjacent pressure relief channels.

[0013] Preferably, the cell placement compartment of the multifunctional housing is opened in a clip-on structure to form a multifunctional elastic interlayer and a clip-on water flow channel; it also includes a heat insulation pad disposed between each adjacent bare blade cell.

[0014] Preferably, the number of explosion-proof valves at the bottom of the bare blade cell ranges from 1 to 5, and the spacing between them is equal.

[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 bare blade cells.

[0016] Preferably, the length of the multifunctional housing is 1200-1600mm, and the height is 180-250mm; the two large surfaces of the bare battery cell body are provided with grooves that penetrate the top of the blade bare battery cell, and locking blocks are inserted into the corresponding two grooves between two adjacent blade bare battery cells; the blade bare battery cell is also provided with a fixing member for vertically limiting the blade bare battery cell; the fixing member is used for detachable connection with the multifunctional housing; the locking block is interference-fitted with the groove.

[0017] Preferably, the front cover plate and the rear cover plate of the battery cell are both integral plate structures or multiple independent plate structures corresponding to each of the bare blade battery cells; it also includes an insulating strong magnet disposed on the outside of the bare blade battery cell; the insulating strong magnet includes a strong magnet sheet and a thermally conductive silicone pad; the thermally conductive silicone pad wraps the strong magnet sheet; the insulating strong magnet is ring-shaped, including a circular ring, a rectangular ring, or an elliptical ring; the insulating strong magnet is connected to the bare battery 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 blade-shaped bare battery cell, a bare 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 facing forward or backward 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 a flat, elongated blade-shaped 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 blade-shaped bare battery cell module according to this utility model.

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

[0023] Figure 3 This is a schematic diagram of the side structure of a blade-shaped bare battery cell module according to this utility model.

[0024] Figure 4 This is a schematic diagram of the combined exploded structure of a blade-shaped bare battery cell module according to this utility model.

[0025] Figure 5 and Figure 6 This is a schematic diagram of the side structure of a blade-shaped bare battery cell module in its combined state according to this utility model.

[0026] Figure 7 This is an exploded structural diagram of the vehicle chassis structure corresponding to the blade-shaped 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 7 The present invention provides a blade-shaped 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 forward or backward, 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, elongated blade-shaped structure.

[0035] A bare battery cell module includes a blade-shaped bare battery cell 11, a multi-functional housing 122 formed by injection molding or casting, a battery cell front cover plate 121 disposed at the front end of the multi-functional housing 122, and a battery cell rear cover plate disposed at the rear end of the multi-functional housing 122; a plurality of battery cell placement compartments for placing the blade-shaped bare battery cells 11 are sequentially formed in the multi-functional housing 122; the battery cell front cover plate 121 and the battery cell rear cover plate are shaped to match the two ends of each blade-shaped bare battery cell 11, effectively improving the anti-breakage performance of the blade-shaped bare battery cell 11, and electrode connection holes for exposing the positive electrode and the negative electrode are formed on the battery cell front cover plate 121 or the battery cell rear cover plate; it also includes a heat dissipation water flow channel disposed inside the multi-functional housing 122; the battery cell front cover plate 121 and the battery cell rear cover plate 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.

[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 channels are sequentially and spaced apart between adjacent groups of blade bare cells.

[0037] The bottom of the multi-functional housing 122 is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of the bare blade battery cell 11; and the explosion-proof valve corresponds to the position of the pressure relief channel; the bottom water flow channel is spaced apart from each of the adjacent pressure relief channels.

[0038] The battery cell placement compartment of the multifunctional housing 122 is opened in a clip-on structure, forming a multifunctional elastic interlayer and a clip-on water flow channel; it also includes a heat insulation pad disposed between each adjacent bare blade battery cell 11.

[0039] The number of explosion-proof valves at the bottom of the bare blade cell 11 ranges from 1 to 5, and the spacing between them is equal.

[0040] The inner side of the multifunctional enclosure 122 is also provided with several firewalls for fire protection and isolation; the firewalls are located between two adjacent bare blade cells 11.

[0041] The length of the multifunctional housing 122 ranges from 1200 to 1600 mm, and the height ranges from 180 to 250 mm. Grooves penetrating the top of the blade bare battery cell 11 are formed on two large surfaces of the bare battery cell body, and locking blocks are inserted into the corresponding two grooves between two adjacent blade bare battery cells 11. A fixing member for vertically limiting the blade bare battery cell 11 is also provided on the blade bare battery cell 11. The fixing member is detachably connected to the multifunctional housing 122. The locking block is interference-fitted with the groove.

[0042] The front cover plate 121 and the rear cover plate of the battery cell are both integral plate structures or multiple independent plate structures corresponding to each of the bare blade battery cells 11; it also includes an insulating strong magnet disposed on the outside of the bare blade battery cell 11; the insulating strong magnet includes a strong magnet sheet and a thermally conductive silicone pad; the thermally conductive silicone pad wraps the strong magnet sheet; the insulating strong magnet is ring-shaped, including circular ring, rectangular ring or elliptical ring; the insulating strong magnet is connected to the bare battery cell body by adhesive or riveting.

[0043] A vehicle chassis structure 1 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 dedicated 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 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.

[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 blade-shaped bare battery cell, a bare 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 facing forward or backward 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 a flat, elongated blade-shaped structure, 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 blade-shaped bare battery cell, characterized in that: It includes a bare cell body formed by stacking or winding, a positive terminal and a negative terminal set on the bare cell body facing forward or backward, and an explosion-proof valve located at the bottom or top of the bare cell body; the bare cell body is generally in the form of a flat, elongated blade structure.

2. A bare battery cell module, characterized in that: The device includes the blade-shaped bare battery cell of claim 1, an insulated multi-functional housing formed by injection molding or casting, a battery cell front cover plate disposed at the front end of the multi-functional housing, and a battery cell rear cover plate disposed at the rear end of the multi-functional housing; a plurality of battery cell placement compartments for placing the blade-shaped bare battery cells are sequentially opened in the multi-functional housing; the battery cell front cover plate and the battery cell rear cover plate are shaped to match the two ends of each blade-shaped bare battery cell, effectively improving the anti-breakage performance of the blade-shaped bare battery cell, and the battery cell front cover plate or the battery cell rear cover plate is provided with a terminal connection hole for exposing the positive terminal and the negative terminal; it also includes a heat dissipation water flow channel disposed inside the multi-functional housing; the battery cell front cover plate and the battery cell rear cover plate 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.

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 channels are arranged sequentially at intervals between adjacent groups of blade bare cells.

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 the bare battery cell of the blade; 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 cell placement compartment of the multifunctional enclosure is opened in a clip-on structure, forming a multifunctional elastic interlayer and a clip-on water flow channel; it also includes a heat insulation pad disposed between each adjacent bare blade cell.

6. A bare cell module as described in any one of claims 2 to 4, characterized in that: The number of explosion-proof valves at the bottom of the bare blade cell ranges from 1 to 5, and the spacing between them is equal.

7. A bare 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 bare blade cells.

8. A bare cell module as described in claim 2, characterized in that: The length of the multifunctional housing ranges from 1200 to 1600 mm, and the height ranges from 180 to 250 mm. Grooves penetrating the top of the blade-shaped bare battery cell are formed on two large surfaces of the bare battery cell body, and locking blocks are inserted into the corresponding two grooves between two adjacent blade-shaped bare battery cells. A fixing component for vertically limiting the blade-shaped bare battery cell is also provided on the blade-shaped bare battery cell. The fixing component is detachably connected to the multifunctional housing. The locking block is interference-fitted with the groove.

9. A bare cell module as described in claim 8, characterized in that: The front cover plate and the rear cover plate of the battery cell are both integral plate structures or multiple independent plate structures corresponding to each of the bare blade battery cells; it also includes an insulating strong magnet disposed on the outside of the bare blade battery cell; the insulating strong magnet includes a strong magnet sheet and a thermally conductive silicone pad; the thermally conductive silicone pad wraps the strong magnet sheet; the insulating strong magnet is ring-shaped, including circular ring, rectangular ring or elliptical ring; the insulating strong magnet is connected to the bare battery 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.

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