Battery module box cover and battery module

Abstract

The utility model provides a battery module box cover and a battery module, the battery module box cover comprises: a box cover body provided with a welding hole penetrating through the box cover body; the electric connecting sheet is fixed on one side of the box cover body, the electric connecting sheet is provided with a welding spot, and the welding spot is exposed out of the welding hole; and the welding hole sealing cover is fixed on the other side of the box cover body and is used for sealing the welding hole. According to the utility model, the electric connecting sheet is integrated on the box cover body, the welding connection between the electric connecting sheet and the battery is realized through the welding hole, and then the welding hole is sealed through the welding hole sealing cover, so that a traditional CCS bracket can be omitted, and the integration level, the space utilization rate and the installation efficiency of the battery module are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery module cover and a battery module. Background Art

[0002] A power PACK refers to a battery pack composed of multiple battery cells, and is usually used in fields such as energy storage systems and electric vehicles. The components of a power PACK include battery modules, a mechanism system, an electrical system, a thermal management system, and a BMS (battery management system).

[0003] Currently, the power PACKs on the market have low integration and low space utilization rate, and the connection of each part is through bolts and nuts, resulting in low installation efficiency and high cost. Summary of the Utility Model

[0004] Embodiments of the utility model provide a battery module cover and a battery module, which can improve the technical problems of low integration, low space utilization rate, and low installation efficiency existing in the existing battery modules.

[0005] In a first aspect, embodiments of the utility model provide a battery module cover, including:

[0006] A cover body provided with welding holes, and the welding holes penetrate through the cover body;

[0007] An electrical connection piece fixed on one side of the cover body, the electrical connection piece having a welding point, and the welding point exposing from the welding hole;

[0008] A welding hole sealing cover fixed on the other side of the cover body for sealing the welding hole.

[0009] In the embodiments of the utility model, by integrating the electrical connection piece on the cover body, realizing its welding connection with the battery through the welding hole, and then sealing the welding hole through the welding hole sealing cover, the traditional CCS bracket can be omitted, thereby improving the integration, space utilization rate, and installation efficiency of the battery module.

[0010] In one embodiment, the electrical connection piece is fixed on the cover body by an injection molding integrated molding method, and the electrical connection piece is clamped on the cover body.

[0011] In the embodiments of the utility model, by fixing the electrical connection piece on the cover body by an injection molding integrated molding method, the installation efficiency of the cover can be improved. By clamping the electrical connection piece on the cover body, effective fixation of the electrical connection piece can be achieved.

[0012] In one embodiment, the electrical connection piece includes a positive electrical connection piece, a negative electrical connection piece, and a series / parallel electrical connection piece. The series / parallel electrical connection piece is used to connect multiple battery cells in series or in parallel to form a battery pack. The positive electrical connection piece is connected to the positive electrode of the battery pack, and the negative electrical connection piece is connected to the negative electrode of the battery pack. A plurality of welding holes and a plurality of series / parallel electrical connection pieces are provided, and the electrical connection pieces correspond to the welding holes one by one. The part of the box cover body between two adjacent welding holes is a partition part. Every two series / parallel electrical connection pieces form a group. The series / parallel electrical connection pieces in a group are adjacent and integrally provided, and the series / parallel electrical connection pieces in a group are clamped on the partition part therebetween.

[0013] In an embodiment of the present invention, by making the electrical connection pieces correspond to the welding holes one by one, the welding of each electrical connection piece to the battery can be effectively realized, and at the same time, the self-strength of the box cover body is ensured. By clamping the adjacent series / parallel electrical connection pieces that are integrally provided on the partition part therebetween, the series / parallel electrical connection pieces can be stably fixed on the box cover body, and at the same time, the solder joints on the series / parallel electrical connection pieces are fully exposed in the welding holes, so as to facilitate the welding operation.

[0014] In one embodiment, fixing plates are provided on one circumferential side of the welding holes corresponding to the positive electrical connection piece and the negative electrical connection piece respectively. The fixing plates are integrally formed with the box cover body. The fixing plates, the positive electrical connection piece, and the negative electrical connection piece are arranged on the same side of the box cover body. The positive electrical connection piece and the negative electrical connection piece respectively pass through the fixing plates on one side of their corresponding welding holes.

[0015] In an embodiment of the present invention, by passing the positive electrical connection piece and the negative electrical connection piece through the fixing plates on one side of their corresponding welding holes, the positive electrical connection piece and the negative electrical connection piece can be fixed on the box cover body. In one embodiment, the electrical connection pieces are grouped. Each group of electrical connection pieces includes two rows of electrical connection pieces arranged oppositely. Each row of electrical connection pieces includes a plurality of electrical connection pieces. The arrangement direction of each row of electrical connection pieces is the same as the arrangement direction of the battery cells. The positive and negative electrodes of the battery cells are respectively connected to the adjacent electrical connection pieces in the two rows of electrical connection pieces arranged oppositely. A plurality of welding holes are provided, and the welding holes correspond to the electrical connection pieces one by one.

[0016] In an embodiment of the present invention, by connecting two rows of electrical connection pieces arranged oppositely to the positive and negative electrodes of the battery cells respectively, the series and parallel connection of the battery cells can be effectively realized.

[0017] In one embodiment, the number of the welding hole sealing covers is twice the number of the groups of the electrical connection pieces, and each welding hole sealing cover seals one row of the welding holes.

[0018] In an embodiment of the present utility model, by making each welding hole sealing cover seal one row of welding holes, the number of welding hole sealing covers can be reduced, which is convenient for the installation of the welding hole sealing covers and the box cover.

[0019] In one embodiment, the battery module box cover further includes a PCB board, the PCB board and the electrical connection pieces are arranged on the same side of the box cover body, and the PCB board is welded to the electrical connection pieces; and / or

[0020] The welding hole sealing cover is welded to the box cover body.

[0021] In an embodiment of the present utility model, by welding the PCB board to the electrical connection pieces and the welding hole sealing cover to the box cover body, screwless fixation can be achieved, thereby reducing the number of parts and facilitating installation.

[0022] In a second aspect, an embodiment of the present utility model provides a battery module, including:

[0023] The above-mentioned battery module box cover;

[0024] A plurality of battery cells, which are respectively welded to the electrical connection pieces, the positive and negative electrodes of the battery cells are arranged on the same side of the battery cells, and the positive and negative electrodes of the battery cells are respectively welded to different electrical connection pieces.

[0025] In an embodiment of the present utility model, by arranging the positive and negative electrodes of the battery cells on the same side, it is convenient to weld to the electrical connection pieces on the box cover body.

[0026] In one embodiment, the battery module further includes a box body, the battery cells are arranged in the box body, and the box body is welded to the box cover body.

[0027] In an embodiment of the present utility model, by welding the box body to the box cover body, screwless fixation can be achieved, thereby reducing the number of parts and facilitating installation.

[0028] In one embodiment, an adhesive layer is arranged between the side of the battery cell facing away from the battery module box cover and the box body.

[0029] In an embodiment of the present utility model, by using the adhesive layer, fixed connection between the battery cell and the box body can be achieved, and traditional end plates and side plates can be omitted, thereby reducing the number of parts and facilitating installation. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of a battery module cover provided by an embodiment of the present invention (the welding hole sealing cover is not shown);

[0032] Figure 2 is an exploded view of a battery module cover provided by an embodiment of the present invention (the welding hole sealing cover is not shown);

[0033] Figure 3 is an exploded view of a battery module provided by an embodiment of the present invention.

[0034] Description of the drawings: Cover body - 1; Welding hole - 11; Partition part - 12; Fixed plate - 13; Welding hole sealing cover - 2; Electrical connection piece - 3; Welding point - 31; Positive electrical connection piece - 32; Negative electrical connection piece - 33; Series / parallel electrical connection piece - 34; PCB board - 4; Battery cell - 5; Positive electrode - 51; Negative electrode - 52; Box body - 6; Adhesive layer - 7. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation manners described here are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the drawings; and "inner" and "outer" refer to the outline of the device.

[0036] Please refer to Figures 1 to 3 , in the first aspect, an embodiment of the present invention provides a battery module cover, including:

[0037] A cover body 1, provided with a welding hole 11, and the welding hole 11 penetrates through the cover body 1;

[0038] An electrical connection piece 3, fixed to one side of the cover body 1, and the electrical connection piece 3 has a welding point 31, and the welding point 31 exposes from the welding hole 11;

[0039] The welding hole sealing cover 2 is fixed to the other side of the box cover body 1 and is used to seal the welding hole 11.

[0040] It can be understood that the welding hole 11 on the box cover body 1 is provided for facilitating the welding operation of the electrical connection piece 3 and the battery cell 5 after the box cover body 1 is connected to the box body 6. Its size can be set as required, as long as it facilitates the welding of the welding point 31 of the electrical connection piece 3 and the battery cell 5. The welding point 31 of the electrical connection piece 3 is used for electrical connection with the positive electrode 51 or the negative electrode 52 of the battery cell 5, so as to realize the series and parallel connection of the battery cells 5. The number of welding holes 11 can correspond one by one to the welding points 31 on the electrical connection piece 3, or can be one-to-many, and can be set as required. The number of welding hole sealing covers 2 can correspond one by one to the number of welding holes 11, or can be one-to-many. In this solution, in order to facilitate the connection between the welding hole sealing cover 2 and the box cover body 1, one welding hole sealing cover 2 can seal multiple welding holes 11.

[0041] In one embodiment, the electrical connection piece 3 is fixed to the box cover body 1 by an injection molding integrated forming method, and the electrical connection piece 3 is clamped on the box cover body 1.

[0042] It can be understood that the box cover body 1 and the electrical connection piece 3 are connected by an injection molding integrated forming method, that is, through injection molding, the box cover body 1, the welding hole 11 and the electrical connection piece 3 are processed integrally at one time. After injection molding is completed, the electrical connection piece 3 is clamped on the box cover body 1, and the welding point 31 on the electrical connection piece 3 is exposed from the welding hole 11, which can effectively reduce the processing procedures and improve the processing accuracy and speed. The electrical connection piece 3 can also be clamped on the box cover body 1 after the box cover body 1 is processed.

[0043] In one embodiment, the electrical connection piece 3 includes a positive electrode electrical connection piece 32, a negative electrode electrical connection piece 33 and a series / parallel electrical connection piece 34. The series / parallel electrical connection piece 34 is used to connect multiple battery cells 5 in series or in parallel to form a battery pack. The positive electrode electrical connection piece 32 is connected to the positive electrode of the battery pack, and the negative electrode electrical connection piece 33 is connected to the negative electrode of the battery pack. A plurality of welding holes 11 and series / parallel electrical connection pieces 343 are provided. The electrical connection piece 3 corresponds one by one to the welding hole 11. The part of the box cover body 1 between two adjacent welding holes 11 is a partition part 12. Every two series / parallel electrical connection pieces 34 are a group. A group of series / parallel electrical connection pieces 34 are adjacent and integrally arranged, and a group of series / parallel electrical connection pieces 34 are clamped on the partition part 12 therebetween.

[0044] It can be understood that the positive electrode connection piece 32 is connected to the positive electrode of the battery pack, and the negative electrode connection piece 33 is connected to the negative electrode of the battery pack. That is, the positive and negative electrodes of the battery pack are respectively connected to the electrical equipment through the positive electrode connection piece 32 and the negative electrode connection piece 33 to form a loop. By making the connection pieces 3 correspond to the welding holes 11 one by one, compared with the situation where one welding hole 11 corresponds to multiple connection pieces 3, the one-to-one correspondence method can make only the solder joints 11 on the corresponding connection piece 3 exposed in a single welding hole 11, which is convenient for the welding operation of the welding 11. Thus, the covering area of a single welding hole 11 can be made smaller, which is beneficial to improving the strength of the lid body 1. The partition part 12 is automatically formed when the welding holes 11 are opened on the lid body 1. The lid body 1 between the welding holes 11 is the partition part 12, and the shape and size of the partition part 12 can be set as needed. The partition part 12 is used to fix the series / parallel connection pieces 34.

[0045] In one embodiment, on the circumferential side of the welding holes 11 corresponding to the positive electrode connection piece 32 and the negative electrode connection piece 33 respectively, there are fixed plates 13. The fixed plates 13 are integrally formed with the lid body 1. The fixed plates 13 and the positive electrode connection piece 32 and the negative electrode connection piece 33 are arranged on the same side of the lid body 1. The positive electrode connection piece 32 and the negative electrode connection piece 33 respectively pass through the fixed plates 13 on one side of their corresponding welding holes 11.

[0046] It can be understood that the fixed plates 13 are integrally formed with the lid body 1. When the lid body 1 is injection molded, the fixed plates 13 are formed on the lid body 1, and the positive electrode connection piece 32 and the negative electrode connection piece 33 pass through the fixed plates 13. Which side of the circumference of the welding hole 11 the fixed plate 13 is arranged on can be determined according to the orientation of the positive electrode connection piece 32 and the negative electrode connection piece 33, as long as it is convenient for the arrangement of the positive electrode connection piece 32 and the negative electrode connection piece 33. In one embodiment, the connection pieces 3 are grouped. Each group of connection pieces 3 includes two rows of connection pieces 3 arranged opposite to each other. Each row of connection pieces 3 includes multiple connection pieces 3. The arrangement direction of each row of connection pieces 3 is the same as the arrangement direction A of the battery cells 5. The positive electrode 51 and the negative electrode 52 of the battery cell 5 are respectively connected to the adjacent connection pieces 3 in the two rows of connection pieces 3 arranged opposite to each other. Multiple welding holes 11 are provided, and the welding holes 11 correspond to the connection pieces 3 one by one.

[0047] It can be understood that the number of groups of the connection pieces 3 is the same as the number of rows in which the single battery cells are arranged. The positive electrode 51 and the negative electrode 52 of the battery cell 5 are respectively connected to the adjacent connection pieces 3 in the two rows of connection pieces 3 arranged opposite to each other. That is, the positive electrode 51 of the battery cell 5 is connected to one of the connection pieces 3, and the negative electrode 52 of the battery cell 5 is connected to the other connection piece 3 opposite to this connection piece 3, which is convenient for realizing the series and parallel connection of the battery cells 5.

[0048] In one embodiment, the number of welding hole sealing covers 2 is twice the number of groups of electrical connection pieces 3, and each welding hole sealing cover 2 seals a row of welding holes 11.

[0049] In one embodiment, the battery module box cover further includes a PCB board 4. The PCB board 4 and the electrical connection pieces 3 are arranged on the same side of the box cover body 1, and the PCB board 4 is welded to the electrical connection pieces 3; and / or

[0050] The welding hole sealing cover 2 is welded to the box cover body 1.

[0051] It can be understood that the welding of the PCB board 4 and the electrical connection pieces 3 can be operated on the side of the box cover body where they are located. The PCB board 4 can be arranged between two opposite rows of electrical connection pieces 3, so as to facilitate the welding of the PCB board 4 and the electrical connection pieces 3.

[0052] In a second aspect, an embodiment of the present invention provides a battery module, including:

[0053] The above-mentioned battery module box cover;

[0054] A plurality of battery cells 5, which are respectively welded to the electrical connection pieces 3. The positive electrode 51 and the negative electrode 52 of the battery cell 5 are arranged on the same side of the battery cell 5, and the positive electrode 51 and the negative electrode 52 of the battery cell 5 are respectively welded to different electrical connection pieces 3.

[0055] It can be understood that the welding of the battery cell 5 and the electrical connection pieces 3 can be carried out after the battery cell 5 is installed in the box body 6 and the box cover body 1 is fixedly connected to the box body 6.

[0056] In one embodiment, the battery module further includes a box body 6. The battery cells 5 are arranged in the box body 6, and the box body 6 is welded to the box cover body 1.

[0057] In one embodiment, an adhesive layer 7 is provided between the side of the battery cell 5 facing away from the battery module box cover and the box body 6.

[0058] It can be understood that the adhesive layer 7 can be coated on the bottom of the battery cell 5 or on the inner bottom of the box body 6. The thickness and shape of the adhesive layer 7 can be set as required.

[0059] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A battery module box cover, characterized in that: include: The box cover body is provided with a welding hole, and the welding hole passes through the box cover body; An electrical connection piece, fixed to one side of the box cover body, the electrical connection piece having a welding point, and the welding point is exposed from the welding hole; The welding hole sealing cover is fixed to the other side of the box cover body and is used for sealing the welding hole.

2. The battery module box cover according to claim 1, characterized in that: The electrical connection piece is fixed on the box cover body by means of integral injection molding, and the electrical connection piece is clamped on the box cover body.

3. The battery module box cover according to claim 1, characterized in that: The electrical connection sheet includes a positive electrical connection sheet, a negative electrical connection sheet and a series / parallel electrical connection sheet. The series / parallel electrical connection sheet is used to connect multiple battery cells in series or in parallel to form a battery pack. The positive electrical connection sheet is connected to the positive electrode of the battery pack, and the negative electrical connection sheet is connected to the negative electrode of the battery pack. A plurality of welding holes and series / parallel electrical connection sheets are provided. The electrical connection sheets correspond to the welding holes one by one. The portion of the box cover body located between two adjacent welding holes is a partition. Every two series / parallel electrical connection sheets form a group. A group of series / parallel electrical connection sheets are adjacent and integrally arranged. A group of series / parallel electrical connection sheets is card-arranged on the partition therebetween.

4. The battery module box cover according to claim 3, characterized in that: A fixing plate is provided on one circumferential side of the welding hole corresponding to each of the positive and negative electrical connecting sheets, and the fixing plate is integrally formed with the box cover body. The fixing plate and the positive and negative electrical connecting sheets are arranged on the same side of the box cover body, and the positive and negative electrical connecting sheets are respectively penetrated in the fixing plates on one side of the corresponding welding holes.

5. The battery module box cover according to claim 1, characterized in that: The electrical connecting sheets are arranged in groups, each group of the electrical connecting sheets includes two rows of the electrical connecting sheets arranged opposite to each other, each row of the electrical connecting sheets includes a plurality of the electrical connecting sheets, the arrangement direction of the electrical connecting sheets in each row is the same as the arrangement direction of the battery cells, the positive and negative electrodes of the battery cells are respectively connected to the adjacent electrical connecting sheets in the two rows of the electrical connecting sheets arranged opposite to each other, a plurality of the welding holes are provided, and the welding holes correspond to the electrical connecting sheets one by one.

6. The battery module box cover according to claim 5, characterized in that: The number of the welding hole sealing covers is twice the number of the groups of the electrical connection sheets, and each welding hole sealing cover seals a row of the welding holes.

7. The battery module box cover according to claim 1, characterized in that: The battery module box cover further comprises a PCB board, the PCB board and the electrical connection sheet are arranged on the same side of the box cover body, and the PCB board and the electrical connection sheet are welded and connected; and / or The welding hole sealing cover is welded to the box cover body.

8. A battery module, characterized in that: include: The battery module box cover according to any one of claims 1 to 7; A plurality of battery cells are respectively welded to the electrical connection sheets, the positive electrodes and negative electrodes of the battery cells are arranged on the same side of the battery cells, and the positive electrodes and negative electrodes of the battery cells are respectively welded to different electrical connection sheets.

9. The battery module according to claim 8, characterized in that: The battery module further comprises a box body, the battery cells are arranged in the box body, and the box body is welded to the box cover body.

10. The battery module according to claim 9, characterized in that: An adhesive layer is arranged between the side of the battery cell facing away from the battery module box cover and the box body.

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