A bare cell module structure and manufacturing equipment

Abstract

The utility model provides a kind of making process and structure and manufacturing equipment of bare battery module, comprising the following steps, S1: using 3D printing, injection molding or casting mode prepares multifunctional box structure with several battery placement bin;S2: several bare battery body is placed in corresponding battery placement bin, and bottom waterway cover plate or front cover plate is equipped in the bottom or front end cover of multifunctional box;Upper cover plate or rear cover plate is equipped in the top or rear end cover of multifunctional box;S3: the positive electrode lug or negative electrode lug of each adjacent bare battery body is carried out laser welding connection by laser welding mode, a kind of bare battery module structure, including square bare battery module, cylindrical bare battery module or blade bare battery module;The bare battery module structure prepared by the process of the application can realize the effect of saving space and reducing cost, and ensure the consistency of the product, and is not restricted by the number of battery.

Description

[Technical Field]

[0001] This utility model relates to the field of battery pack cells for new energy vehicles, and in particular to a manufacturing process, structure and equipment for bare cell modules that can effectively improve manufacturing efficiency, enhance operational reliability, save space 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 cells, bare cell modules, 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 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 the number of individual battery packs is large, the cost will increase significantly, and if a fault occurs during subsequent application, repair will 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 manufacturing process for a bare battery cell module is provided, including the following steps.

[0010] S1: Prepare a multi-functional box structure with several battery cell placement compartments using 3D printing, injection molding, or casting methods;

[0011] S2: Place several bare battery cells in the corresponding battery cell storage compartments, and cover the bottom or front of the multi-functional box with a bottom water channel cover or a front cover; cover the top or rear of the multi-functional box with an upper cover or a rear cover.

[0012] S3: The positive or negative tabs of adjacent bare battery cells are connected by laser welding.

[0013] A bare battery cell module structure includes a square bare battery cell module corresponding to a square bare battery cell body, a cylindrical bare battery cell module corresponding to a cylindrical bare battery cell body, or a blade-shaped bare battery cell module corresponding to a blade-shaped bare battery cell body; the square bare battery cell module, the cylindrical bare battery cell module, and the blade-shaped bare battery cell module all have a multi-functional housing for placing the bare battery cell body; a heat dissipation water flow channel is provided inside the multi-functional housing; an inlet and an outlet are respectively provided at the ends of the multi-functional housing; the inlet and the outlet are connected to the heat dissipation water flow channel.

[0014] Preferably, the square bare battery cell module includes square battery cells, a 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; a plurality of battery cell placement compartments for placing the square battery cells are arranged in a matrix in the multi-functional housing; the top cover plate matches the top shape of each square battery cell, and the top cover plate is provided with 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 water outlets are connected to the heat dissipation water flow channel.

[0015] 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 spaced between adjacent groups of square battery cells; 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 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.

[0016] Preferably, the cell placement compartments of the multifunctional enclosure are opened in the X and Y directions; and the number of cell placement compartments in the X direction ranges from 2 to 468; the number of cell placement compartments in the Y direction ranges from 2 to 468; the number of square cells in the multifunctional enclosure is 2 to 468; and the number connected in series ranges from 2 to 468, and the number connected in parallel ranges from 2 to 32.

[0017] Preferably, the cylindrical bare battery cell module includes a cylindrical battery cell, 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; a plurality of battery cell placement compartments for placing the cylindrical battery cells are arranged in a matrix in the multifunctional housing; the top cover plate matches the shape of the top of each cylindrical battery cell, and a terminal connection hole for exposing the full terminal is provided on the top cover plate; it also includes a heat dissipation water flow channel disposed inside the multifunctional housing; an inlet and an outlet are respectively provided at the ends of the multifunctional housing; the inlet and the outlet are connected to the heat dissipation water flow channel; the battery cell placement compartment has a honeycomb structure.

[0018] 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; the bottom of the multifunctional box is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple cylindrical 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.

[0019] Preferably, the blade-shaped bare battery cell module includes a blade 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 battery cells are sequentially opened in the multi-functional housing; the front cover plate and the rear cover plate of the battery cell match the shapes of the two ends of each blade battery cell, effectively improving the anti-breakage performance of the blade battery cell, and the front cover plate or the rear cover plate of the battery cell has a terminal connection hole for exposing the positive terminal and the negative terminal; it 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.

[0020] 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 spaced between adjacent groups of blade cells; the bottom of the multi-functional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds one-to-one with the position of the blade 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 adjacent pressure relief channel.

[0021] A bare battery cell module manufacturing apparatus includes a conveyor line for conveying bare battery cell modules; a positioning mechanism disposed on one side of the conveyor line; the positioning mechanism includes at least one positioning component and a supporting component; the positioning component positions the bare battery cell module conveyed by the conveyor line, the supporting component includes a liftable supporting plate, the supporting plate supports the bottom of the bare battery cell module and drives the bare battery cell module to move upward; and a clamping mechanism disposed on one side of the positioning mechanism; the clamping mechanism clamps a housing and moves the housing above the bare battery cell module, the opening of the housing facing downward to allow the bare battery cell module supported by the supporting plate to enter.

[0022] The technical effects achieved by this application in solving the technical problem are as follows:

[0023] Compared with the prior art, the manufacturing process, structure, and equipment of the bare cell module of this utility model adopts the following steps: S1: Prepare a multi-functional box structure with several cell placement compartments by 3D printing, injection molding, or casting; S2: Place several bare cell bodies in the corresponding cell placement compartments, and cover the bottom or front of the multi-functional box with a bottom water channel cover or a front cover; cover the top or rear of the multi-functional box with an upper cover or a rear cover; S3: Laser weld the positive or negative electrode tabs of each adjacent bare cell body together. The resulting battery product can achieve the effects of saving space and reducing costs, while ensuring product consistency and not being constrained by the number of cells. [Image Description]

[0024] Figure 1 and Figure 2 This is a schematic diagram of a square-structured bare battery cell module according to this utility model.

[0025] Figure 3 and Figure 4 This is a schematic diagram of a cylindrical bare battery cell module according to the present invention.

[0026] Figure 5 and Figure 6 This is a schematic diagram of a bare battery cell module with a blade structure according to 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 manufacturing process of a bare battery cell module according to this utility model includes the following steps:

[0035] S1: Prepare a multi-functional box structure with several battery cell placement compartments using 3D printing, injection molding, or casting methods;

[0036] S2: Place several bare battery cells in the corresponding battery cell storage compartments, and cover the bottom or front of the multi-functional box with a bottom water channel cover or a front cover; cover the top or rear of the multi-functional box with an upper cover or a rear cover.

[0037] S3: The positive or negative tabs of adjacent bare battery cells are connected by laser welding.

[0038] A bare battery cell module structure includes a square bare battery cell module corresponding to a square bare battery cell body, a cylindrical bare battery cell module corresponding to a cylindrical bare battery cell body, or a blade-shaped bare battery cell module corresponding to a blade-shaped bare battery cell body; the square bare battery cell module, the cylindrical bare battery cell module, and the blade-shaped bare battery cell module all have a multi-functional housing for placing the bare battery cell body; a heat dissipation water flow channel is provided inside the multi-functional housing; an inlet and an outlet are respectively provided at the ends of the multi-functional housing; the inlet and the outlet are connected to the heat dissipation water flow channel.

[0039] In some other embodiments, the square bare battery cell module includes square 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; a plurality of battery cell placement compartments for placing the square battery cells are arranged in a matrix in the multifunctional housing; the top cover plate matches the top shape of each square battery cell, and the top cover plate is provided with 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.

[0040] 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 spaced between adjacent groups of square battery cells; 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 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.

[0041] The cell placement compartments of the multifunctional enclosure are opened in the X and Y directions; the number of cell placement compartments in the X direction ranges from 2 to 468; the number of cell placement compartments in the Y direction ranges from 2 to 468; the number of square cells in the multifunctional enclosure ranges from 2 to 468; the number connected in series ranges from 2 to 468; and the number connected in parallel ranges from 2 to 32.

[0042] The cylindrical bare battery cell module includes a cylindrical battery cell, a 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 battery cells; the top cover plate matches the shape of the top of each cylindrical battery cell, and each of the top cover plates has a terminal connection hole for exposing the full terminal post; 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 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.

[0043] 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; the bottom of the multi-functional box is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple cylindrical 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.

[0044] The blade-shaped bare battery cell module includes a blade battery cell, a multi-functional housing formed by injection molding or casting, a front cover plate for the battery cell located at the front end of the multi-functional housing, and a rear cover plate for the battery cell located at the rear end of the multi-functional housing. Several battery cell placement compartments for placing the blade battery cells are sequentially formed within the multi-functional housing. The front cover plate and the rear cover plate match the shapes of both ends of each blade battery cell, effectively improving the anti-breakage performance of the blade battery cell. A terminal connection hole for exposing the positive and negative terminals is formed on the front cover plate or the rear cover plate. The module also includes a heat dissipation water flow channel located inside the multi-functional housing. An inlet and an outlet are respectively provided on the front cover plate and the rear cover plate. The inlet and outlet are connected to the heat dissipation water flow channel.

[0045] 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 spaced between adjacent groups of blade cells; the bottom of the multi-functional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds to a blade cell position; 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.

[0046] A bare battery cell module manufacturing apparatus includes a conveyor line for conveying bare battery cell modules; a positioning mechanism disposed on one side of the conveyor line; the positioning mechanism includes at least one positioning component and a supporting component; the positioning component positions the bare battery cell module conveyed by the conveyor line, the supporting component includes a liftable supporting plate, the supporting plate supports the bottom of the bare battery cell module and drives the bare battery cell module to move upward; and a clamping mechanism disposed on one side of the positioning mechanism; the clamping mechanism clamps a housing and moves the housing above the bare battery cell module, the opening of the housing facing downward to allow the bare battery cell module supported by the supporting plate to enter.

[0047] The technical effects achieved by this application in solving the technical problem are as follows:

[0048] Compared with the prior art, the manufacturing process, structure, and equipment of the bare cell module of this utility model adopts the following steps: S1: Prepare a multi-functional box structure with several cell placement compartments by 3D printing, injection molding, or casting; S2: Place several bare cell bodies in the corresponding cell placement compartments, and cover the bottom or front of the multi-functional box with a bottom water channel cover or a front cover; cover the top or rear of the multi-functional box with an upper cover or a rear cover; S3: Laser weld the positive or negative electrode tabs of each adjacent bare cell body together. The resulting battery product can achieve the effects of saving space and reducing costs, while ensuring product consistency and not being constrained by the number of cells.

[0049] 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 bare cell module structure, characterized in that: The system includes a square bare cell module corresponding to a square bare cell body, a cylindrical bare cell module corresponding to a cylindrical bare cell body, or a blade-shaped bare cell module corresponding to a blade-shaped bare cell body; each of the square, cylindrical, and blade-shaped bare cell modules has a multi-functional housing for placing the bare cell body; a heat dissipation water flow channel is provided inside the multi-functional housing; an inlet and an outlet are respectively provided at the ends of the multi-functional housing; the inlet and outlet are connected to the heat dissipation water flow channel.

2. The bare cell module structure as described in claim 1, characterized in that: The square bare battery cell module includes square battery cells, a 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 battery cells; the top cover plate matches the top shape of each square battery cell, and the top cover plate has electrode connection holes for exposing the positive and negative electrodes; 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.

3. The bare cell module structure 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 sequentially spaced between adjacent groups of square battery cells; 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 battery cells in the same group; it also includes explosion-proof valves corresponding to the positions of the pressure relief channels; the bottom water flow channels are spaced apart from each adjacent pressure relief channel.

4. The bare cell module structure as described in claim 3, characterized in that: The cell placement compartments of the multifunctional enclosure are opened in the X and Y directions; the number of cell placement compartments in the X direction ranges from 2 to 468; the number of cell placement compartments in the Y direction ranges from 2 to 468; the number of square cells in the multifunctional enclosure ranges from 2 to 468; the number connected in series ranges from 2 to 468; and the number connected in parallel ranges from 2 to 32.

5. The bare cell module structure as described in claim 3, characterized in that: The cylindrical bare battery cell module includes a cylindrical battery cell, a 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 battery cells; the top cover plate matches the shape of the top of each cylindrical 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 water outlets are connected to the heat dissipation water flow channel; the cell placement compartments have a honeycomb structure.

6. The bare cell module structure as described in claim 5, 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 to form a flow channel structure similar to a corrugated cardboard shell; the bottom of the multi-functional box is also provided with multiple pressure relief channels; each pressure relief channel corresponds to the position of multiple cylindrical 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.

7. The bare cell module structure as described in claim 2, characterized in that: The blade-shaped bare battery cell module includes a blade battery cell, a multi-functional housing formed by injection molding or casting, a front cover plate for the battery cell located at the front end of the multi-functional housing, and a rear cover plate for the battery cell located at the rear end of the multi-functional housing. Several battery cell placement compartments for placing the blade battery cells are sequentially formed within the multi-functional housing. The front cover plate and the rear cover plate match the shapes of both ends of each blade battery cell, effectively improving the anti-breakage performance of the blade battery cell. A terminal connection hole for exposing the positive and negative terminals is formed on the front cover plate or the rear cover plate. The module also includes a heat dissipation water flow channel located inside the multi-functional housing. An inlet and an outlet are respectively provided on the front cover plate and the rear cover plate. The inlet and outlet are connected to the heat dissipation water flow channel.

8. The bare cell module structure as described in claim 7, 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 sequentially spaced between adjacent groups of blade cells; the bottom of the multi-functional enclosure is also provided with multiple pressure relief channels; each pressure relief channel corresponds to a blade cell position; 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.

9. A manufacturing apparatus, characterized in that: The device includes a conveyor line for conveying bare battery cell modules; a positioning mechanism disposed on one side of the conveyor line; the positioning mechanism includes at least one positioning component and a supporting component; the positioning component positions the bare battery cell modules conveyed by the conveyor line, and the supporting component includes a liftable supporting plate that supports the bottom of the bare battery cell modules and moves them upward; and a clamping mechanism disposed on one side of the positioning mechanism; the clamping mechanism clamps a housing and moves the housing above the bare battery cell modules, with the opening of the housing facing downward to allow the bare battery cell modules supported by the supporting plate to enter.

Images