A PACK structure

Abstract

The utility model discloses a PACK structure, including the shell, be provided with a plurality of battery groups in the shell, the top of a plurality of battery groups all buckle has the support, and the top of support is provided with a plurality of aluminium bar respectively, and the bottom of aluminium bar is connected with the battery group top electric core and is passed through the bottom of support, is used for the battery in battery group series connection, the top of support's middle part still is provided with the PCB board, and the top of PCB board is provided with a plurality of connecting parts, and the connecting part is connected with corresponding aluminium bar respectively, is used for gathering electric core data, the top of support still is provided with the positioning assembly, and the positioning connection of a plurality of aluminium bars and PCB board and support, the utility model discloses design structure is reasonable through the setting of a plurality of aluminium bars, PCB board in support, then through connecting part and positioning assembly, and a plurality of aluminium bars and PCB board, support form a in integral whole outside battery group, then in the assembly of this component integral with battery group, thereby solves the problem of being more complicated when existing assembly, and the influence integral assembly efficiency problem.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically a PACK structure. Background Technology

[0002] The current PACK structure mainly includes several systems such as single battery modules, electrical system, thermal management system, enclosure and BMS (Battery Management System). Among them, BMU (Battery Management Unit) in BMS is one of the core components of the battery management system and is usually closely related to BMS. BMU is mainly responsible for real-time monitoring of the battery, including the acquisition and processing of key parameters such as voltage, current and temperature.

[0003] In most current PACKs, the BMU consists of a sampling harness and a BMU unit. The sampling harness is connected to the battery cell aluminum bar on the PACK to collect data from the battery cell. The data is then transmitted to the BMU, and the BMU then transmits the data to the main control unit. The entire process of making and installing the sampling harness is time-consuming and labor-intensive, and due to the large number of installation points, it is easy to make mistakes.

[0004] Therefore, in order to reduce costs and improve production efficiency, CCS (Cells Contact System, integrated busbar) technology is also used to replace sampling harnesses. PCB boards or FPC boards are used to realize sampling, transmission and other functions. Since the board is integrally thermoformed, although it can simplify some installation processes, during assembly, several batteries must first be assembled to form a battery pack. Then, the tooling is clipped onto the top of the battery pack. Then, the workers place aluminum bars in the corresponding positions for welding. After the aluminum bars are fixed, the tooling is fixed again by fixing components. This makes the process still relatively cumbersome and complicated, affecting assembly efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a PACK structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A PACK structure includes a housing, inside which are disposed a plurality of battery packs. Each of the battery packs is fastened to the top of a bracket, and the top of the bracket is provided with a plurality of aluminum bars. The bottom of the aluminum bars passes through the bottom of the bracket and is connected to the battery cells at the top of the battery packs for connecting the batteries in series within the battery packs.

[0008] A PCB board is also installed at the top of the middle part of the bracket. Several connecting parts are installed at the top of the PCB board. The connecting parts are connected to the corresponding aluminum bars for collecting cell data.

[0009] The top of the bracket is also equipped with a positioning component for positioning and connecting several aluminum bars to the PCB board and the bracket.

[0010] Furthermore, the positioning component includes a plurality of first positioning posts and a plurality of second positioning posts, the bottoms of the plurality of first positioning posts and the bottoms of the plurality of second positioning posts being connected to the top of the bracket.

[0011] Several first positioning posts penetrate the top of the PCB board and are used for positioning and connecting the PCB board.

[0012] Several second positioning posts penetrate the top of several corresponding aluminum bars, and are used for positioning and connecting the aluminum bars.

[0013] Furthermore, the connecting part is a nickel sheet, one side of which is fixedly connected to the aluminum bar, and the other side of which is fixedly connected to the PCB board.

[0014] Furthermore, the PCB board has several first openings in the middle, the same number as the number of batteries in the battery pack.

[0015] A second opening is provided in the middle of the bracket, corresponding to the first opening, to expose the explosion-proof valve and QR code on the electromagnetic battery pack.

[0016] Furthermore, several control structures are set on the PCB board;

[0017] The control structure includes two connecting slots, and the connecting slots are located at the edge of the PCB board and are equipped with a shearing part. When the PCB board processing error is large, the shearing part is cut off to form a Z-shaped structure on the PCB board, so that the Z-shaped structure on the PCB board can be adjusted slightly back and forth.

[0018] Furthermore, the top of the PCB board has several chips corresponding to the number of batteries in the battery pack, used for monitoring and regulating the battery cells.

[0019] Furthermore, the PCB board is composed of several sub-PCB boards connected to each other. Adjacent sub-PCB boards are provided with a first connection structure and a second connection structure on their sides that are close to each other. The two sub-PCB boards are connected by the cooperation of the first connection structure and the second connection structure.

[0020] A third connection structure is provided on each of the sub-PCBs located at both ends of the PCB board. The third connection structure is located on the part of the sub-PCB board near the non-connection end and is used for data transmission.

[0021] Furthermore, the top of the bracket is provided with several grooves, the bottom of the second positioning post is in the groove, and the inner wall of the groove is in contact with the outer side of the aluminum bar, which is used to reduce the height of the aluminum bar so that the bottom recess of the aluminum bar passes through the groove and contacts the battery cell.

[0022] Furthermore, the housing includes a water-cooled plate, the top of which is connected to the bottom of several battery packs, and the top of the water-cooled plate is fixedly connected to the bottom of the top cover.

[0023] Compared with existing technologies, this PACK structure has the following advantages:

[0024] I. This utility model solves the problem of the cumbersome and complicated assembly process that affects the overall assembly efficiency by setting several aluminum bars and PCB boards on a bracket, and then forming a whole with the aluminum bars, PCB boards and bracket outside the battery pack through the connecting part and positioning component. Then the whole component is assembled with the battery pack.

[0025] Second, by adding several chips to the PCB board, which can be directly connected to the main control, the PCB board is enhanced with the ability to process information and perform operations. This eliminates the need for the use of BMU unit and sampling line, and monitors each cell. Under the premise of ensuring battery safety, the cost is greatly reduced. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a three-dimensional structural diagram of the bracket of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the aluminum bar in this utility model;

[0029] Figure 4 This is an exploded structural diagram of the present invention;

[0030] Figure 5 This is a three-dimensional structural diagram of the water-cooled plate in this utility model;

[0031] Figure 6 This is a partial three-dimensional structural diagram of the PCB board in this utility model.

[0032] In the figure: 1. First opening; 2. Second positioning post; 3. Connecting groove; 4. Connecting part; 5. Chip; 6. First connecting structure; 7. Second connecting structure; 8. Third connecting structure; 9. Top cover; 10. Water cooling plate; 11. Bracket; 12. PCB board; 13. Aluminum bar; 14. First positioning post. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figures 1-6 As shown, this utility model provides a technical solution: a PACK structure, including a shell, with a plurality of battery packs disposed inside the shell, and a bracket 11 fastened to the top of each of the battery packs. A plurality of aluminum bars 13 are respectively disposed on the top of the bracket 11, and the bottom of each aluminum bar 13 penetrates through the bottom of the bracket 11 and connects to the battery cells at the top of the battery pack, for connecting the batteries in the battery pack in series. A PCB board 12 is also disposed on the top of the middle part of the bracket 11, and a plurality of connecting parts 4 are disposed on the top of the PCB board 12, which are respectively connected to the corresponding aluminum bars 13 for collecting battery cell data. A positioning component is also disposed on the top of the bracket 11 for positioning and connecting the aluminum bars 13 to the PCB board 12 and the bracket 11, so that during assembly, the aluminum bars 13 and the PCB board 12 are first assembled on the bracket 11 outside the battery pack, and then the bracket 11 is used to fasten the entire assembly to the top of the battery pack, connecting the battery cells and the corresponding aluminum bars 13, thereby improving assembly efficiency.

[0035] In use, the bracket 11, several aluminum bars 13, and PCB board 12 are first assembled into a whole. Then, the bracket 11 is directly fastened to the top of the battery pack, so that the aluminum bars 13 contact the corresponding cells. Finally, the aluminum bars 13 are welded to the cells by manual or automated means. Since the assembly of the bracket 11, aluminum bars 13, and PCB board 12 can all be completed on the outside of the battery pack, only the final welding and fixing on the battery pack is required. This makes it easier for workers to operate and eliminates tooling, thereby improving the overall efficiency of the battery pack assembly.

[0036] The positioning assembly includes several first positioning posts 14 and several second positioning posts 2. The bottoms of the first positioning posts 14 and the second positioning posts 2 are connected to the top of the bracket 11. The first positioning posts 14 penetrate the top of the PCB board 12 for positioning and connecting the PCB board 12. The second positioning posts 2 penetrate the tops of corresponding aluminum bars 13 for positioning and connecting the aluminum bars 13. In use, the circular holes on the aluminum bars 13 and the PCB board 12 are adapted to the diameters of the corresponding second positioning posts 2 and the first positioning posts 14, so as to improve the stability of positioning the aluminum bars 13 and the PCB board 12 through the friction between the inner wall of the circular hole and the corresponding first positioning posts 14 and the second positioning posts 2, while limiting their left and right swaying. Alternatively, corresponding protrusions can be provided on the first positioning posts 14 and the second positioning posts 2 to engage with the aluminum bars 13 and the PCB board 12, thereby improving the positioning and connection effect.

[0037] The connecting part 4 is a nickel sheet. One side of the nickel sheet is fixedly connected to the aluminum bar 13, and the other side of the nickel sheet is fixedly connected to the PCB board 12. In use, the fixed connection here is a welding connection. The nickel sheet is first welded to the PCB board 12, and then welded to the aluminum bar 13. Multiple aluminum bars 13 and PCB board 12 are connected to enable PCB board 12 to collect data from the battery cell.

[0038] The PCB board 12 has several first openings 1 in the middle, the same number as the number of batteries in the battery pack; the bracket 11 has a second opening in the middle corresponding to the first opening 1, which is used to expose the explosion-proof valve and QR code on the electromagnetic battery pack; in use, the first opening 1 and the second opening have the same shape and correspond to the explosion-proof valve and QR code below, ensuring that the entire process of the battery pack cells can be traced and its safety is guaranteed.

[0039] The PCB board 12 is provided with several control structures. The control structures include two connecting slots 3, and the connecting slots 3 are provided with shearing parts at the edge of the PCB board 12. When the processing error of the PCB board 12 is large, the shearing parts are cut off to form a Z-shaped structure on the PCB board 12, so that the Z-shaped structure on the PCB board 12 can be adjusted slightly back and forth. In use, the connecting slot 3 is triangular in shape, and one end is located on the outer side or edge of the PCB board 12. The edge of the PCB board 12 at this point is fixedly connected by the two sides of the triangular shearing part. When it is necessary to reduce the processing error, it can be shortened to avoid being subjected to large torque and thus affecting normal operation.

[0040] The top of the PCB board 12 has several chips 5 corresponding to the number of batteries in the battery pack. The pins of the chips 5 are soldered to pads on the PCB board 12, and the PCB board 12 also has a cell control circuit. The cells are monitored and regulated by connecting the soldered chips 5 to the circuit. In use, by adding several chips 5 to the PCB board 12, with the number corresponding to the number of batteries, the chips 5 can be STL9963E. This adds chips 5 to the existing CCS technology, enabling direct connection to the master control. The PCB board 12 increases the ability to process information and execute operations, thereby eliminating the need for a BMU unit and sampling lines. Each cell is monitored, significantly reducing costs while ensuring battery safety.

[0041] The PCB board 12 is composed of several interconnected sub-PCB boards. Adjacent sub-PCB boards have a first connection structure 6 and a second connection structure 7 on their sides, respectively, which connect the two sub-PCB boards. A third connection structure 8 is located on each of the sub-PCB boards at both ends of the PCB board 12, near the non-connection ends. The third connection structure 8 is used for data transmission. In use, the first connection structure 6 and the second connection structure 7 are connection terminals, reducing torque between sub-boards and preventing large processing errors from affecting normal operation. The third connection structure 8 is also a connection terminal and connects to the data transmission line, directly sending the collected battery cell data to the main control unit. The PCB board 12 has corresponding wiring paths that connect to the corresponding connection terminals, connecting the chip 5 to the connection terminals and the control circuit. Each chip 5 collects data from each battery cell, and then transmits the data to the main control unit through the connection terminals of the first connection structure 6, the second connection structure 7, and the third connection structure 8.

[0042] The top of the bracket 11 is provided with several grooves, the bottom of the second positioning post 2 is in the groove, and the inner wall of the groove is in contact with the outer side of the aluminum bar 13, which is used to reduce the height of the aluminum bar 13 so that the bottom recess of the aluminum bar 13 passes through the groove and contacts the battery cell; the outer shell includes a water cooling plate 10, the top of the water cooling plate 10 is connected to the bottom of several battery packs, and the top of the water cooling plate 10 is fixedly connected to the bottom of the top cover 9. The fixed connection here can be made by bolt connection, glue connection, welding, snap buckle, etc.; in use, four sets of battery strings are placed on the water cooling plate 10 coated with thermal conductive adhesive, and two sets of battery strings are connected in series through copper busbars respectively. Then, the fire-fighting components, explosion-proof valves, terminals and other components on the PACK top cover 9 are installed to complete the assembly.

Claims

1. A PACK structure, comprising a housing, wherein a plurality of battery packs are disposed within the housing, characterized in that, Each of the battery packs has a bracket (11) fastened to its top. Each bracket (11) has a plurality of aluminum bars (13) on its top. The bottom of each aluminum bar (13) passes through the bottom of the bracket (11) and connects to the battery cell at the top of the battery pack, for connecting the batteries in the battery pack in series. The top of the middle part of the bracket (11) is also provided with a PCB board (12), and the top of the PCB board (12) is provided with a plurality of connecting parts (4), which are respectively connected to the corresponding aluminum bar (13) for collecting cell data. The top of the bracket (11) is also provided with a positioning component for positioning and connecting several of the aluminum bars (13) with the PCB board (12) and the bracket (11).

2. The PACK structure according to claim 1, characterized in that: The positioning component includes a plurality of first positioning posts (14) and a plurality of second positioning posts (2), the bottoms of the plurality of first positioning posts (14) and the bottoms of the plurality of second positioning posts (2) are all connected to the top of the bracket (11); Several of the first positioning posts (14) penetrate the top of the PCB board (12) and are used for positioning and connecting the PCB board (12); Several second positioning posts (2) pass through the top of the corresponding aluminum bars (13) respectively, for positioning and connecting the aluminum bars (13).

3. The PACK structure according to claim 1, characterized in that: The connecting part (4) is a nickel sheet, one side of which is fixedly connected to the aluminum bar (13), and the other side of which is fixedly connected to the PCB board (12).

4. The PACK structure according to claim 1, characterized in that: The PCB board (12) has a number of first openings (1) in the middle, which are the same number of batteries as the battery pack; The bracket (11) has a second opening in the middle part corresponding to the first opening (1), which is used to expose the explosion-proof valve and QR code on the battery pack.

5. The PACK structure according to claim 1, characterized in that: The PCB board (12) is provided with several control structures; The control structure includes two connecting slots (3), and the connecting slots (3) are provided with a shearing part at the edge of the PCB board (12) to cut off the shearing part when the processing error of the PCB board (12) is large, so as to form a Z-shaped structure on the PCB board (12) so that the Z-shaped structure on the PCB board (12) can be adjusted slightly back and forth.

6. The PACK structure according to claim 1, characterized in that: The PCB board (12) has several chips (5) on its top, corresponding to the number of batteries in the battery pack, for monitoring and regulating the battery cells.

7. The PACK structure according to claim 1, characterized in that: The PCB board (12) is composed of several sub-PCB boards connected to each other. The adjacent sub-PCB boards are respectively provided with a first connection structure (6) and a second connection structure (7) on the side that is close to each other. The two sub-PCB boards are connected by the cooperation of the first connection structure (6) and the second connection structure (7). A third connection structure (8) is provided on each of the sub-PCBs located at both ends of the PCB board (12). The third connection structure (8) is located on the part of the sub-PCB near the non-connection end and is used for data transmission.

8. The PACK structure according to claim 2, characterized in that: The top of the bracket (11) is provided with several grooves, the bottom of the second positioning post (2) is in the groove, and the inner wall of the groove is in contact with the outer side of the aluminum bar (13) to reduce the height of the aluminum bar (13) so that the bottom recess of the aluminum bar (13) passes through the groove and contacts the battery cell.

9. The PACK structure according to claim 6, characterized in that: The housing includes a water-cooled plate (10), the top of which is connected to the bottom of a plurality of the battery packs, and the top of which is fixedly connected to the bottom of the top cover (9).

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