Integrated cover plate for energy storage battery pack

Abstract

The utility model relates to the technical field of energy storage battery packs, in particular to an integrated cover plate for an energy storage battery pack, which comprises an upper pressing film, a lower pressing film, and a sampling component, connecting aluminum bars and an output pole component which are arranged between the upper pressing film and the lower pressing film, the output pole assemblies are arranged at left and right ends of the lower pressing film; the positioning plate is arranged on the top surface of the lower pressing film; the positioning block is mounted on the sampling assembly; the two positioning plates are respectively arranged at the middle part and the right part of the lower pressing film; the two positioning blocks are respectively arranged at the middle part and the right part of the sampling assembly; a plurality of first convex parts are formed on the connecting aluminum bar, and large positioning holes corresponding to the first convex parts are formed in the positioning plate; a positioning column is arranged in the middle of the positioning plate, and a small positioning hole corresponding to the positioning column is formed in the positioning block; the integrated cover plate for the energy storage battery pack provided by the utility model is simple in structural design and high in integration level, and the sampling assembly and the connecting aluminum bar are relatively positioned.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery pack technology, and in particular to an integrated cover plate for energy storage battery packs. Background Technology

[0002] Traditional integrated cover plates mainly use injection molded plates or vacuum-formed plates, aluminum bars and wire harnesses, which have high mass production costs and pose a risk of short circuit due to wire harness wear. In order to solve the problem of wire harness wear, existing integrated cover plates use injection molded plates or vacuum-formed plates, aluminum bars and FPC, but have the following drawbacks: (1) In order to fix aluminum bars and FPC, injection molded plates or vacuum-formed plates need a certain thickness and features, resulting in low space utilization and limited effect on reducing the height of the battery pack; (2) Injection molded plates or vacuum-formed plates have high manufacturing costs and large weight.

[0003] Currently, integrated cover plates utilize double-layer membrane pressing technology to hot-press together FPC, aluminum busbars, and other components, thereby reducing the thickness and weight of the integrated cover plate and lowering the height of the battery pack. However, because the FPC and aluminum busbar are not relatively positioned, relative displacement may occur between them during placement or hot pressing, affecting the stable connection between them and consequently impacting product performance and quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated cover plate for energy storage battery packs with simple structural design, high integration, and relative positioning of sampling components and connecting aluminum bars.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: an integrated cover plate for an energy storage battery pack, including an upper pressure film, a lower pressure film, and a sampling component, a connecting aluminum bar, and an output electrode component disposed between the upper and lower pressure films. The connecting aluminum bar is distributed on the front and rear sides of the sampling component, and the output electrode component is disposed at the left and right ends of the lower pressure film. It also includes a positioning plate disposed on the top surface of the lower pressure film and a positioning block mounted on the sampling component. There are two positioning plates, which are respectively disposed in the middle and right parts of the lower pressure film. There are two positioning blocks, which are respectively disposed in the middle and right parts of the sampling component. Multiple first protrusions are formed on the connecting aluminum bar, and large positioning holes corresponding to the first protrusions are opened on the positioning plate. A positioning post is provided in the middle of the positioning plate, and small positioning holes corresponding to the positioning post are opened on the positioning block.

[0006] Furthermore, the sampling assembly includes a sampling line board, solder terminals, an NTC, and a connector. The sampling line board extends along the length of the pressure film. The solder terminals and the NTC are both mounted on the sampling line board and connected to the connecting aluminum bar. The connector is mounted on the left end of the sampling line board.

[0007] Furthermore, a fixing bracket is provided at the left end of the pressure membrane, and the connector is disposed within the fixing bracket.

[0008] Furthermore, the left end of the sampling line board is connected to a connector via a crimp terminal or a PCB board.

[0009] Furthermore, the PCB board includes a conductive layer, an insulating layer, and a heat dissipation layer. The insulating layer is disposed between the conductive layer and the heat dissipation layer, and a carbon block is embedded in the groove of the heat dissipation layer.

[0010] Furthermore, the output electrode assembly includes a mounting bracket and an aluminum electrode plate. The mounting bracket is disposed at the end of the pressure diaphragm, the aluminum electrode plate is disposed on the mounting bracket, a pin is disposed in the middle of the mounting bracket, a retaining edge is disposed on the outer side of the mounting bracket, and a socket corresponding to the pin is formed on the aluminum electrode plate.

[0011] Furthermore, a second protrusion is formed on the aluminum electrode plate.

[0012] Furthermore, the aluminum electrode plate is partially nickel-plated or has nickel sheets attached.

[0013] Furthermore, a thermally conductive pad is provided on the bottom surface of the pressure film.

[0014] Furthermore, both the upper and lower pressure films are provided with through holes, which correspond to the first and second protrusions.

[0015] The beneficial effects of this utility model are:

[0016] (1) By setting up a positioning plate and a positioning block, the first protrusion is inserted into the positioning large hole, and the positioning post is inserted into the positioning small hole, so as to realize the relative positioning of the sampling component and the connecting aluminum bar, avoid the relative displacement between the FPC and the aluminum bar, ensure the stable connection between the FPC and the aluminum bar, and thus ensure the product performance and quality.

[0017] (2) The present invention provides protection and fixation for the connector by setting up a fixed bracket.

[0018] (3) This utility model achieves the connection between the sampling line board and the connector by crimping terminals or PCB boards, which greatly improves production efficiency and reduces production costs.

[0019] (4) By setting up a heat dissipation layer, this utility model significantly improves the heat dissipation performance of the PCB board and ensures the working performance of the PCB board.

[0020] (5) This utility model achieves the relative positioning of the mounting bracket and the aluminum electrode plate by inserting the pin into the socket and cooperating with the edge. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an exploded view of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the sampling component in this utility model;

[0024] Figure 3 This is a front view of the connecting aluminum bar in this utility model;

[0025] Figure 4 This is a cross-sectional view of the PCB board in this utility model.

[0026] In the diagram: 100, upper pressure film; 110, through hole; 200, lower pressure film; 300, sampling assembly; 310, sampling line board; 320, solder terminal; 330, NTC; 340, connector; 350, fixing bracket; 400, connecting aluminum bar; 410, first protrusion; 500, output electrode assembly; 510, mounting bracket; 520, aluminum electrode plate; 521, socket; 522, second protrusion; 530, pin; 540, flange; 600, positioning plate; 610, positioning large hole; 700, positioning block; 710, positioning small hole; 800, positioning post; 910, conductive layer; 920, insulating layer; 930, heat dissipation layer; 940, carbon block; 1000, thermal pad. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] Example 1

[0029] like Figures 1-3As shown, an integrated cover plate for an energy storage battery pack includes an upper pressure membrane 100, a lower pressure membrane 200, a sampling component 300, a connecting aluminum bar 400, and an output electrode assembly 500 disposed between the upper pressure membrane 100 and the lower pressure membrane 200. The connecting aluminum bar 400 is distributed on the front and rear sides of the sampling component 300, and the output electrode assembly 500 is disposed at the left and right ends of the lower pressure membrane 200. It also includes a positioning plate 600 disposed on the top surface of the lower pressure membrane 200 and a positioning plate mounted on the sampling component 300. The sampling component 300 consists of two positioning plates 600, one in the middle and one on the right. The connecting aluminum bar 400 has multiple first protrusions 410, and the positioning plate 600 has large positioning holes 610 corresponding to the first protrusions 410. The positioning plate 600 has a positioning post 800 in the middle, and the positioning block 700 has small positioning holes 710 corresponding to the positioning post 800.

[0030] Specifically, the upper pressure film 100 and the lower pressure film 200 are made of PET (polyethylene terephthalate) film with a thickness of 0.13mm; the connecting aluminum bar 400 has an etched fuse, which eliminates the installation space of a separate fuse and reduces production costs; the integrated cover plate is less than 5mm thick, making it lightweight and easy to modularly produce, and its electrical performance can meet the following requirements: withstand voltage ≥2500VDC, inter-circuit current ≤200mA, leakage current ≤1mA, and maximum withstand current 600A; the positioning hole 610 can be circular or elliptical; and the bottom surface of the lower pressure film 200 is provided with a heat-conducting pad 1000.

[0031] By using the positioning plate 600 and positioning block 700, the first protrusion 410 is inserted into the large positioning hole 610, while the positioning post 800 is inserted into the small positioning hole 710. This achieves relative positioning between the sampling component 300 and the connecting aluminum bar 400, preventing relative displacement between them and ensuring a stable connection, thus guaranteeing product performance and quality. Furthermore, this application integrates the sampling component 300 and the connecting aluminum bar 400 together, significantly reducing the thickness and weight of the integrated cover plate and achieving product integration. This ensures product performance and quality while simplifying the production process. Simultaneously, this application uses a terminal piercing crimping solution instead of the traditional welding solution, eliminating quality risks such as unstable signal transmission and large errors caused by poor soldering of terminal pins (e.g., output electrode component 500, positioning plate 600) to the board.

[0032] like Figure 2As shown, the sampling assembly 300 includes a sampling line board 310, solder terminals 320, an NTC (temperature sensor) 330, and a connector 340. The sampling line board 310 extends along the length of the pressure film 200. Both the solder terminals 320 and the NTC 330 are mounted on the sampling line board 310 and connected to the connecting aluminum bar 400. The connector 340 is mounted on the left end of the sampling line board 310. Specifically, the sampling line board 310 is an FPC (flexible printed circuit board) or FFC (flexible flat cable); the solder terminals 320 collect voltage data; and the NTC 330 collects temperature data, meeting the requirements of a 10KΩ@25℃ impedance and a resistance ≤1Ω from the sampling position to the pin of the connector 340, and an integrated cover plate temperature measurement range of -40℃ to 85℃.

[0033] like Figure 1 As shown, a fixing bracket 350 is provided at the left end of the pressure membrane 200, and the connector 340 is disposed within the fixing bracket 350. The fixing bracket 350 serves to protect and fix the connector 340.

[0034] The left end of the sampling line board 310 is connected to the connector 340 via a crimp terminal or PCB board. This design greatly improves production efficiency and reduces production costs.

[0035] like Figure 1 As shown, the output electrode assembly 500 includes a mounting bracket 510 and an aluminum electrode plate 520. The mounting bracket 510 is disposed at the end of the lower pressure diaphragm 200, and the aluminum electrode plate 520 is disposed on the mounting bracket 510. A pin 530 is provided in the middle of the mounting bracket 510, and a retaining edge 540 is provided on the outer side of the mounting bracket 510. The aluminum electrode plate 520 has a socket 521 corresponding to the pin 530. The relative positioning of the mounting bracket 510 and the aluminum electrode plate 520 is achieved by the insertion of the pin 530 into the socket 521 and the cooperation of the retaining edge 540. Specifically, a second protrusion 522 is formed on the aluminum electrode plate 520. The second protrusion 522 of the right aluminum electrode plate 520 corresponds to a positioning hole 610 on the right positioning plate 600. The second protrusion 522 is inserted into the positioning hole 610 to achieve further positioning of the aluminum electrode plate 520. The partial nickel plating or nickel sheeting of the aluminum electrode plate 520 is less expensive than ultrasonic copper-aluminum lap welding, ultrasonic torque welding and copper-aluminum composite welding.

[0036] like Figure 1 and Figure 3 As shown, both the upper pressure film 100 and the lower pressure film 200 have through holes 110, which correspond to the first protrusion 410 and the second protrusion 522. The through holes 110 are provided to avoid the first protrusion 410 and the second protrusion 522.

[0037] The processing flow is as follows: Place silicone on the base plate → Place Teflon on the base plate → Place the lower pressure film 200 on the base plate → Place the sampling component 300 → Place the connecting aluminum bar 400 and the output electrode component 500 → Place the upper pressure film 100 → Place Teflon → Place silicone → Place the upper tooling plate → Place it in the hot pressing equipment for hot pressing for 20-30 minutes → Place it in the cold pressing equipment for 10 minutes.

[0038] Example 2

[0039] This embodiment improves upon Embodiment 1 by modifying the PCB board, such as... Figure 4 As shown, in this embodiment, the PCB board includes a conductive layer 910, an insulating layer 920, and a heat dissipation layer 930. The insulating layer 920 is disposed between the conductive layer 910 and the heat dissipation layer 930, and a carbon block 940 is embedded in the groove of the heat dissipation layer 930. The heat dissipation layer 930 significantly improves the heat dissipation performance of the PCB board, ensuring its operational performance.

[0040] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An integrated cover plate for an energy storage battery pack, comprising an upper pressure film (100), a lower pressure film (200), a sampling component (300), a connecting aluminum bar (400), and an output electrode assembly (500) disposed between the upper pressure film (100) and the lower pressure film (200), wherein the connecting aluminum bar (400) is distributed on the front and rear sides of the sampling component (300), and the output electrode assembly (500) is disposed at the left and right ends of the lower pressure film (200); characterized in that: It also includes a positioning plate (600) disposed on the top surface of the pressure membrane (200) and a positioning block (700) mounted on the sampling assembly (300); there are two positioning plates (600), which are respectively disposed in the middle and right part of the pressure membrane (200); there are two positioning blocks (700), which are respectively disposed in the middle and right part of the sampling assembly (300); a plurality of first protrusions (410) are formed on the connecting aluminum bar (400), and the positioning plate (600) is provided with a positioning large hole (610) corresponding to the first protrusion (410); a positioning post (800) is provided in the middle of the positioning plate (600), and the positioning block (700) is provided with a positioning small hole (710) corresponding to the positioning post (800).

2. The integrated cover plate for energy storage battery pack according to claim 1, characterized in that: The sampling assembly (300) includes a sampling line board (310), solder terminals (320), an NTC (330), and a connector (340). The sampling line board (310) extends along the length of the pressure film (200). The solder terminals (320) and the NTC (330) are both mounted on the sampling line board (310) and connected to the connecting aluminum bar (400). The connector (340) is mounted on the left end of the sampling line board (310).

3. The integrated cover plate for energy storage battery pack according to claim 2, characterized in that: The left end of the pressure membrane (200) is provided with a fixing bracket (350), and the connector (340) is disposed inside the fixing bracket (350).

4. The integrated cover plate for energy storage battery pack according to claim 2, characterized in that: The left end of the sampling line board (310) is connected to the connector (340) via a crimp terminal or PCB board.

5. The integrated cover plate for an energy storage battery pack according to claim 4, characterized in that: The PCB board includes a conductive layer (910), an insulating layer (920), and a heat dissipation layer (930). The insulating layer (920) is disposed between the conductive layer (910) and the heat dissipation layer (930). A carbon block (940) is embedded in the groove of the heat dissipation layer (930).

6. The integrated cover plate for an energy storage battery pack according to claim 1, characterized in that: The output electrode assembly (500) includes a mounting bracket (510) and an aluminum electrode plate (520). The mounting bracket (510) is disposed at the end of the pressure diaphragm (200), and the aluminum electrode plate (520) is disposed on the mounting bracket (510). A pin (530) is disposed in the middle of the mounting bracket (510), and a retaining edge (540) is disposed on the outer side of the mounting bracket (510). A socket (521) corresponding to the pin (530) is opened on the aluminum electrode plate (520).

7. The integrated cover plate for an energy storage battery pack according to claim 6, characterized in that: A second protrusion (522) is formed on the aluminum electrode plate (520).

8. The integrated cover plate for an energy storage battery pack according to claim 6, characterized in that: The aluminum electrode plate (520) is partially nickel-plated or has nickel-plated sheets.

9. The integrated cover plate for an energy storage battery pack according to claim 1, characterized in that: A thermal pad (1000) is provided on the bottom surface of the pressure membrane (200).

10. The integrated cover plate for an energy storage battery pack according to claim 7, characterized in that: Both the upper pressure film (100) and the lower pressure film (200) are provided with through holes (110), and the through holes (110) correspond to the first protrusion (410) and the second protrusion (522).

Images