Integrated battery module

Abstract

The utility model provides an integrated battery module which comprises a plurality of battery core bodies, and one end of each battery core body is respectively provided with a positive pole lug and a negative pole lug; the inner shell is provided with an upper end opening, the inner shell is provided with a plurality of separated spaces, and each separated space is used for accommodating one battery core body; the inner shell is provided with a plurality of bulges; and the upper cover is positioned at the upper end opening of the inner shell and is provided with a plurality of accommodating grooves for accommodating the positive electrode lugs and the negative electrode lugs, the upper cover is provided with a plurality of grooves, and the grooves can be inserted into the bulges so as to seal the battery core body in the inner shell. The integrated battery module disclosed by the utility model is good in sealing performance, small in size and high in safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an integrated battery module. Background Art

[0002] With the continuous development of new energy electric vehicles, new energy electric vehicles are developing towards lightweight and small size. However, the current traditional battery modules are generally stacked by multiple finished battery cells and external structural parts. Each of the multiple battery cells needs to have a separate shell. A battery module has multiple shells, which easily causes the battery module to be large in size. In addition, since the battery module needs to be connected with multiple external structural parts, the problem of large size and high weight of the battery module is further aggravated. In order to solve the problem of large battery module size and poor sealing performance in the prior art, some technologies have disclosed the idea of ​​removing the aluminum shells of each battery cell and using only one integrated module contained in the shell. However, how to achieve sealing and corresponding functions and effects after the battery cell has no aluminum shell is an urgent problem to be solved. Utility Model Content

[0003] In order to achieve an excellent sealing effect of an integrated battery module, the utility model provides an integrated battery module, comprising: a plurality of battery cells, each of which is provided with a positive electrode tab and a negative electrode tab at one end; an inner shell having an upper end opening, the inner shell having a plurality of partition spaces, each of the partition spaces being used to accommodate one of the battery cells; the inner shell having a plurality of protrusions; an upper cover, located at the upper end opening of the inner shell and having a plurality of accommodating grooves to accommodate the positive electrode tab and the negative electrode tab, the upper cover having a plurality of grooves, the grooves being insertable into the protrusions to seal the battery cells in the inner shell.

[0004] Further, the plurality of grooves include axial grooves extending in the left-right direction and longitudinal grooves in the front-rear direction.

[0005] Furthermore, the upper cover is also provided with a liquid injection hole, and the electrolyte can be injected into each battery core through the liquid injection hole.

[0006] Furthermore, the injection hole is configured as a cylindrical hollow protrusion protruding outward from a surface of the upper cover.

[0007] Furthermore, it also includes a PCB circuit board assembly, on which a plurality of connection rows are arranged, and the plurality of connection rows can connect the positive electrode tabs and the negative electrode tabs of the respective battery cells.

[0008] Furthermore, the upper cover is provided with a plurality of positive electrode tab accommodating grooves and a plurality of negative electrode tab accommodating grooves, and in the left-right direction, the liquid injection hole is located between the positive electrode tab accommodating grooves and the negative electrode tab accommodating grooves.

[0009] Furthermore, the plurality of positive electrode tab accommodating grooves are arranged side by side in the front-to-back direction.

[0010] Furthermore, a top cover is included, and the positive pole and the negative pole on the PCB circuit assembly can pass through the top cover.

[0011] Furthermore, it also includes an outer shell, the inner shell is installed in the outer shell, and the top cover is used to cover the outer shell. The integrated battery module of the utility model has good sealing performance, high overall performance, small size, light weight, low cost, and one shell can accommodate multiple battery cores at the same time, which simplifies the connection method of the battery module, is highly integrated, and has high assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall schematic diagram of the integrated battery module of the utility model;

[0013] Figure 2 This is an exploded schematic diagram of the integrated battery module of the utility model;

[0014] Figure 3 It is a schematic diagram of a battery cell in the integrated battery module of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the PCB circuit board of the integrated battery module of the utility model;

[0016] Figure 5 It is a schematic diagram of the inner shell in the integrated battery module of the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the upper cover in the integrated battery module of the utility model;

[0018] Figure 7 It is a schematic diagram of the other side of the upper cover in the integrated battery module of the utility model;

[0019] Figure 8 In the utility model integrated battery module Figure 7 A is a partial enlarged schematic diagram of the middle part. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0021] To facilitate the explanation of directions, we define the installation direction of the battery module as the up-down direction, the axial direction of the battery core as the left-right direction, and the third direction perpendicular to both the up-down direction and the left-right direction as the front-back direction.

[0022] like Figure 1-2 As shown, the integrated battery module of the utility model comprises: a plurality of battery cores 30, an inner shell 20 for mounting the plurality of cores 30, an outer shell 10 disposed outside the inner shell 20, an upper cover 40 disposed on the upper end of the battery core 30, a PCB circuit board assembly 50 located above the upper cover 40, and a top cover 60. Figure 1-6 The detailed structure of the integrated battery module of the utility model is described in detail.

[0023] The integrated battery module of the utility model is provided with a plurality of battery cores 30, which may be composed of a rolled core or a stacked core, and include a positive electrode sheet (not shown), a negative electrode sheet (not shown), and a diaphragm (not shown), and one end of each battery core 30 is provided with a positive electrode tab 301 and a negative electrode tab 302. In the integrated battery module of the utility model, four battery cores 30 are provided, and of course, the number of battery cores 30 can be appropriately adjusted according to actual needs, and the battery cores 30 can be connected in series and parallel according to actual needs.

[0024] The inner shell 20 is preferably made of plastic, and is in the shape of a rectangular parallelepiped with an open top, and is provided with a plurality of partition spaces 201 inside, each of which can accommodate a battery cell 30, so that the inner shell 20 physically separates each battery cell 30, and each battery cell 30 can operate independently of each other without interfering with or affecting each other. Compared with the prior art method in which each battery cell requires a separate aluminum shell for packaging, the assembly process of the battery cell is greatly simplified, and the production cost of the battery cell is saved. Each partition space 201 in the utility model is surrounded by a plurality of axial protrusions 203 and longitudinal protrusions 204, and there are 5 limiting protrusions 205 arranged in parallel in the front-to-back direction; there are two longitudinal protrusions 204 arranged in parallel in the front-to-back direction; the plurality of axial protrusions 204 and longitudinal protrusions 204 evenly divide the internal space of the inner shell 20 into 4 independent partition spaces 201 to accommodate each of the 4 battery cells 30. A plurality of limiting protrusions 205 are disposed on the outside of the inner shell 20 . The limiting protrusions 205 are close to the opening end of the inner shell 20 and partially protrude from the outer wall of the inner shell.

[0025] The upper cover 40 is preferably made of plastic and is generally rectangular in shape, covering the upper opening of the inner shell 20. The upper cover 40 is provided with a positive electrode ear accommodating groove 401 and a negative electrode ear accommodating groove 402. In the front-to-back direction, four positive electrode ear accommodating grooves 401 are arranged side by side; four negative electrode ear accommodating grooves 402 are also arranged side by side. Further, in the left-right direction, four injection holes 403 are arranged in the middle part of the upper cover 40, and each injection hole 403 corresponds to each partition space 201 in the inner shell 20, so that when each battery core 30 is installed in the partition space 201 of the inner shell 20, the electrolyte can be injected into each partition space 201 in the inner shell 20 through the injection hole 403, so that the electrolyte can be injected into multiple battery cores 30 in the battery module at one time, without the need to inject into each battery core one by one. Compared with the traditional battery module, the injection efficiency of the electrolyte is higher. In the embodiment of the utility model, the injection hole 403 is constructed as a cylindrical hollow protrusion protruding upward from the upper surface 404 of the upper cover 20. The injection hole 403 is set to protrude more outward than the upper surface 404 of the upper cover, so that when it is necessary to inject electrolyte into the integrated module, the external injection device can be directly fixed on the outside of the cylindrical hollow protrusion. Compared with the solution in which the injection hole is set flush with the plane, the injection hole structure of the utility model is easier to realize automatic operation. At the same time, on the lower surface opposite to the upper surface of the upper cover, a part of the injection hole 403 is constructed as a cylindrical hollow protrusion protruding downward from the lower surface. The injection hole is constructed to be opposite to the partition space 201 and to be separated from the battery core by a certain distance so as to more efficiently inject electrolyte into the battery core. At the same time, a plurality of axial grooves 406 and longitudinal grooves 407 are arranged on the lower cover of the utility model. The axial groove 406 can be inserted into the axial protrusion 203 on the inner shell; the longitudinal groove 407 can be inserted into the longitudinal protrusion 407.

[0026] The PCB circuit board assembly 50 is composed of a printed circuit board as a whole, and a plurality of parts can be arranged on the PCB circuit board assembly according to the structure and function of the battery module. In the utility model, the PCB circuit board is constructed as a rectangle as a whole, and its size is adapted to the upper cover 40 of the battery core. Specifically, a plurality of notches are arranged on it, and the plurality of notches correspond to the positive pole ear accommodating groove 401 and the negative pole ear accommodating groove 402 on the upper cover respectively so that the positive pole ear 301 and the negative pole ear 302 of the battery cell pass through the PCB circuit board assembly, and the PCB circuit board assembly is also provided with a positive pole ear connection row 503 and a negative pole ear connection row 504. The positive pole ear 301 and the negative pole ear 302 on the battery cell monomer can pass through the corresponding notches on the PCB circuit board 50 and be connected with the positive pole ear connection row 503 and the negative pole ear connection row 504, preferably, the pole ear on the battery cell monomer is connected to the corresponding connection row by welding. However, the connection mode of each connection row with the battery cell monomer 30 can be a series connection or a parallel connection. The PCB circuit board assembly is integrated with a positive pole column 501 and a negative pole column 502. The positive pole column 501 is arranged at the left end of the battery module, adjacent to the positive pole ear 301 of each battery cell, so as to connect the positive pole ear 301 of each battery cell to realize the series and parallel connection of the positive pole ear 301 of the battery cell. The negative pole column 502 is arranged at the right end of the battery module, adjacent to the negative pole ear 302 of each battery cell. The positive pole column 501 and the negative pole column 502 on the PCB circuit board can be connected to the power supply or circuit of the external component of the battery module to realize the power transmission between the battery module and the outside. Furthermore, the PCB circuit board assembly can also be equipped with a temperature and pressure acquisition sheet to monitor the temperature and pressure of each battery cell in real time to feedback the relevant information. The PCB circuit board assembly of the utility model highly integrates the positive pole column, the negative pole column, the temperature acquisition sheet, and the pressure acquisition sheet, with high integration and small size.

[0027] The top cover 60 is formed in a generally rectangular shape and is configured to be adapted to the shape of the PCB circuit board assembly. Specifically, a positive pole accommodating hole and a negative pole accommodating hole are formed on the top cover 60 to accommodate the positive pole 501 and the negative pole 502 on the PCB circuit board assembly when the battery module is assembled. In the present utility model, the top cover 60 is constructed of an insulating material to insulate the top cover 70 from the positive pole 501 and the negative pole 502 on the PCB circuit board assembly and protect the various components on the PCB circuit assembly from external interference.

[0028] The following describes in detail the assembly steps of the battery module of the utility model in conjunction with the accompanying drawings:

[0029] S1: Place each battery core 30 in each independent separation space 201 in the inner shell 20 along the up-down direction, and then install the upper cover 40 to the opening of the inner shell 20. During the installation process, the positive pole ear 301 and the negative pole ear 302 of the battery core are respectively passed through the positive pole ear accommodating groove 401 and the negative pole ear accommodating groove 40 in the upper cover 40, and the axial groove 406 in the upper cover 40 is inserted into the axial protrusion 203 of the inner shell, and the longitudinal groove 407 is inserted into the longitudinal protrusion 204. At the same time, the upper cover is further moved downward by force until the upper cover 40 limit protrusion 207 is inserted into the upper cover 40 limit protrusion 207. 05 abuts, the upper cover cannot move downward any further and is positioned at a specific position of the inner shell, ensuring that the upper cover 40 is tightly fitted with the inner shell 20, and at the same time, glue is provided between the upper cover 40 and the inner shell 20 to seal the gap between the upper cover 40 and the inner shell 20, thereby sealing the battery cell 30 in each independent space of the inner shell 20, and then the assembled inner shell 20, battery cell 30 and upper cover 40 components are installed together in the outer shell 10, and finally the electrolyte is injected into each separated space 201 in the inner shell 20 through the injection hole 403, so as to inject the electrolyte into each battery cell 30 respectively.

[0030] S2: Install the PCB circuit board assembly into the assembly assembled in step S1, so that the positive electrode tab 301 and the negative electrode tab 302 of the battery cell 30 pass through the corresponding receiving grooves on the PCB circuit board assembly; then connect each tab to the corresponding connecting row on the PCB circuit board assembly 50 by welding, so that each battery cell 30 is connected in series and parallel through the PCB circuit board assembly.

[0031] S3: Install the top cover 60 above the PCB circuit board assembly of step S2, so that the positive pole 501 set on the PCB circuit board assembly passes through the positive pole penetration hole (not shown) of the bracket 60, and the negative pole 502 passes through the negative pole penetration hole (not shown) on the bracket 60.

[0032] The battery module of the utility model has multiple battery cores directly encapsulated in one shell, which is different from the prior art that each battery core needs a shell for sealing, thereby reducing the number of core shells and saving space. Thus, the battery cores are directly connected in series and parallel inside the battery module shell and injected with liquid, without the need for multiple external structures such as aluminum-plastic films, achieving the goal of lightweight and small volume of the battery module, and better meeting the functional requirements of the battery core of the electric vehicle. At the same time, a sealing groove is provided in the upper cover of the battery module, which cooperates with the protrusion of the lower shell to form a tight fit, further improving the sealing effect of the battery module, and the battery module will not have the risk of electrolyte leakage, thereby greatly improving the safety performance of the battery module.

[0033] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An integrated battery module, comprising: A plurality of battery cores, each of which has a positive electrode tab and a negative electrode tab at one end; An inner shell having an upper opening, the inner shell having a plurality of partition spaces, each of the partition spaces being used to accommodate one of the battery cores; the inner shell having a plurality of protrusions; The upper cover is located at the upper end opening of the inner shell and has a plurality of accommodating grooves to accommodate the positive electrode tabs and the negative electrode tabs. The characteristic is that the upper cover has a plurality of grooves, which can be inserted into the protrusions to seal the battery core in the inner shell.

2. The integrated battery module according to claim 1, characterized in that: The plurality of grooves include axial grooves extending in the left-right direction and longitudinal grooves in the front-rear direction.

3. The integrated battery module according to claim 1, characterized in that: The upper cover is also provided with a liquid injection hole, through which the electrolyte can be injected into each battery core.

4. The integrated battery module according to claim 3, characterized in that: The liquid injection hole is configured as a cylindrical hollow protrusion protruding outward from a surface of the upper cover.

5. The integrated battery module according to claim 1, characterized in that: It also includes a PCB circuit board assembly, on which a positive pole, a negative pole and a plurality of connection rows are arranged, and the plurality of connection rows can connect the positive pole tabs and the negative pole tabs of each battery core.

6. The integrated battery module according to claim 3, characterized in that: The upper cover is provided with a plurality of positive electrode tab accommodating grooves and a plurality of negative electrode tab accommodating grooves, and in the left-right direction, the injection hole is located between the positive electrode tab accommodating grooves and the negative electrode tab accommodating grooves.

7. The integrated battery module according to claim 6, characterized in that: The plurality of positive electrode tab accommodating grooves are arranged side by side in the front-to-back direction.

8. The integrated battery module according to claim 5, characterized in that: A top cover is also included, and the positive pole and the negative pole on the PCB circuit board assembly can pass through the top cover.

9. The integrated battery module according to claim 8, characterized in that: It also includes an outer shell, the inner shell is installed in the outer shell, and the top cover is used to cover the outer shell.

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