A battery structure for fast automated production

Abstract

The utility model relates to a kind of battery structure of quick automation production, including the integrated female board of several electric core electricity connection;Integrated female board is equipped with BMS mainboard with the end of electric core away;BMS mainboard is equipped with insulating gasket between integrated female board;Integrated female board includes main part and the soft glue film of the soft glue film of two sides of main part;The main part includes FPC soft board;Several busbars are connected on the FPC soft board;The busbar includes the anode connecting portion for being connected with the anode of electric core and the cathode connecting portion for being connected with the cathode of electric core;The anode connecting portion and cathode connecting portion are connected with different electric core respectively.The utility model is high in integration, and FPC soft board can integrate voltage acquisition, temperature acquisition, current collection and other functions, realize the real-time monitoring and management and energy loss of BMS.The design of integrated female board structure is more conducive to heat dissipation;After using integrated female board, the process of assembly is reduced, conducive to automatic assembly and large-scale production.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a battery structure for rapid automated production. Background Technology

[0002] As we all know, we are now in the era of new energy, and various products worldwide are undergoing upgrades and replacements, such as new energy vehicles, electric two-wheelers, robotic vacuum cleaners, AGVs, service robots, and so on. These products all use power batteries. However, the battery designs and production solutions vary greatly between different products, and the production processes are cumbersome and complex. Traditional manufacturing methods are inefficient, reliant on manual labor, and prone to errors. They use a wide variety of materials, resulting in high costs, complex processes, poor shock resistance, and potential battery life and safety issues. Specifically, this manifests as low automation levels, insufficient assembly precision, and high manufacturing costs. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a battery structure for rapid and automated production.

[0004] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0005] A battery structure for rapid automated production includes an integrated motherboard electrically connected to several battery cells; a BMS main board is located at the end of the integrated motherboard away from the battery cells; an insulating gasket is provided between the BMS main board and the integrated motherboard; the integrated motherboard includes a main body and soft adhesive films covering both sides of the main body; the main body includes an FPC flexible circuit board; several busbars are connected to the FPC flexible circuit board; each busbar includes a positive electrode connection portion for connecting to the positive electrode of a battery cell and a negative electrode connection portion for connecting to the negative electrode of a battery cell; different battery cells are respectively connected to the positive electrode connection portion and the negative electrode connection portion.

[0006] In one embodiment of this utility model, the FPC flexible board includes an FPC connector; the BMS motherboard is provided with an FPC female connector connected to the FPC connector.

[0007] In one embodiment of this utility model, the FPC female connector is disposed on the side of the BMS motherboard away from the integrated motherboard.

[0008] In one embodiment of this utility model, the battery cell includes a positive electrode with one end protruding; the circumferential direction of the positive electrode is the negative electrode; the positive electrodes of several battery cells are disposed on the same side; the negative electrode connection portion extends away from the positive electrode connection portion so that the positive electrode connection portion and the negative electrode connection portion are respectively located on different planes; the positive electrode connection portion of the busbar is connected to the positive electrode of the battery cell, and the negative electrode connection portion is connected to the negative electrode of the adjacent battery cell.

[0009] In one embodiment of this utility model, the FPC flexible circuit board is connected to the busbar via a connecting piece; the middle part of the busbar is the flexible circuit board connecting part; the two sides of the flexible circuit board connecting part are a positive electrode connecting part and a negative electrode connecting part, respectively; the connecting piece is connected to the flexible circuit board connecting part.

[0010] In one embodiment of this utility model, a plurality of NTCs are connected to the FPC flexible board.

[0011] In one embodiment of the present invention, at least one of the soft rubber films is provided with a clearance hole that mates with the NTC.

[0012] In one embodiment of the present invention, the soft adhesive film is provided with a positive electrode clearance hole that mates with the positive electrode connection portion and a negative electrode clearance hole that mates with the negative electrode connection portion.

[0013] In one embodiment of this utility model, the soft adhesive film is provided with a plurality of first positioning holes; the busbar is provided with second positioning holes that cooperate with the first positioning holes; and the FPC flexible board is provided with third positioning holes that cooperate with the second positioning holes.

[0014] In one embodiment of this utility model, the soft adhesive film is made of PET material.

[0015] The beneficial effects of this invention are: high integration; voltage acquisition, temperature acquisition, current collection, and other functions can be integrated into the FPC flexible board, enabling real-time monitoring and management of the BMS and energy loss control. The integrated motherboard structure design is more conducive to heat dissipation; the integrated motherboard can be smaller, saving PACK space; by adopting an integrated motherboard, the battery assembly process is reduced, which is conducive to automated assembly and large-scale production, and reduces manufacturing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the integrated motherboard of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 100. Battery cell; 110. Positive electrode of battery cell; 120. Negative electrode of battery cell; 200. Integrated motherboard; 210. Flexible printed circuit board (FPC); 211. FPC connector; 212. Connecting piece; 213. NTC; 214. Third positioning hole; 220. Busbar; 221. Positive electrode connection part; 222. Negative electrode connection part; 223. Flexible printed circuit board connection part; 224. Second positioning hole; 230. Soft adhesive coating; 231. Clearance hole; 232. First positioning hole; 233. Positive electrode clearance hole; 234. Negative electrode clearance hole; 300. Insulating gasket; 400. BMS motherboard; 410. FPC female connector. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] A battery structure for rapid automated production includes an integrated motherboard 200 electrically connected to a plurality of battery cells 100. The battery cells 100 include, but are not limited to, 4695, 21700, 26700, and 32135 cells of different shapes, which can be connected in series and parallel to form a complete circuit loop to provide energy to external products. Multiple battery cells 100 constitute a battery cell group. Each battery cell 100 includes a positive electrode 110 with one protruding end; the circumferential direction of the positive electrode 110 is the negative electrode 120. The positive electrodes 110 of several of the battery cells 100 are disposed on the same side. The integrated motherboard 200 and the battery cells 100 are electrically connected on the same side, which can greatly improve production efficiency. This electrical connection is typically achieved by spot welding or soldering for both fixing and electrical connection in the art.

[0026] In one embodiment, a BMS mainboard 400 is provided at the end of the integrated motherboard 200 away from the battery cell 100; an insulating pad 300 is provided between the BMS mainboard 400 and the integrated motherboard 200. By using the integrated motherboard 200, the battery pack assembly can be achieved more efficiently, the internal structure of the battery pack will be simpler, and the volume occupied will be smaller. In one embodiment, the BMS mainboard 400 uses epoxy board material FR-4 substrate, and different circuit components are designed and arranged according to product requirements to form a power battery BMS management system. The insulating pad 300 can be composed of special materials such as insulating mica paper, mica ceramic, high-temperature damping composite cloth, fiber insulating cloth, aerogel heat insulation sheet, and nano heat insulation material, and its main function is to resist high temperature and provide insulation.

[0027] In one embodiment, the integrated motherboard 200 includes a main body and flexible adhesive films 230 covering both sides of the main body. The main body includes an FPC flexible board 210. A plurality of busbars 220 are connected to the FPC flexible board 210. Each busbar 220 includes a positive electrode connection portion 221 for connecting to the positive electrode of a battery cell 100 and a negative electrode connection portion 222 for connecting to the negative electrode of a battery cell 100. The positive electrode connection portion 221 and the negative electrode connection portion 222 are respectively connected to different battery cells 100. The flexible adhesive films 230 completely enclose the main body, forming a single unit, similar to a sandwich structure. The busbars 220 and corresponding battery cell groups are welded to ensure that the battery cells 100 are connected in series and parallel as required. The substrate used in the FPC flexible board 210 is mainly polyimide copper-clad laminate. This material has high heat resistance and good dimensional stability, and is pressed together with the flexible adhesive films 230, which have both mechanical protection and good electrical insulation properties, to form the final product. In double-sided, multilayer printed circuit boards, the surface and inner conductors are metallized to achieve electrical connection between the inner and outer circuit layers.

[0028] In one embodiment of this utility model, the FPC flexible board 210 includes an FPC connector 211; the BMS mainboard 400 is provided with an FPC female connector 410 connected to the FPC connector 211. The FPC connector 211 can be matched and connected with the FPC female connector 410 on the BMS mainboard 400 to realize the transmission of overall communication, differential pressure, temperature, etc.

[0029] In one embodiment of this utility model, the FPC female connector 410 is disposed on the side of the BMS motherboard 400 away from the integrated motherboard 200. This ensures that the side of the BMS motherboard 400 connected to the integrated motherboard 200 is relatively flat.

[0030] In one embodiment of this utility model, the battery cell 100 includes a positive electrode 110 with one protruding end; the circumferential direction of the positive electrode 110 is the negative electrode 120; several positive electrodes 110 of the battery cells 100 are disposed on the same side; the negative electrode connection portion 222 extends away from the positive electrode connection portion 221 so that the positive electrode connection portion 221 and the negative electrode connection portion 222 are located on different planes; the positive electrode connection portion 221 of the busbar 220 is connected to the positive electrode 110 of the battery cell, and the negative electrode connection portion 222 is connected to the negative electrode 120 of the adjacent battery cell 100. The fact that the negative electrode connection portion 222 and the positive electrode connection portion 221 are located on different planes can be used to compensate for the height difference between the positive electrode 110 and the negative electrode 120 of the battery cell, and better realize the connection between the busbar 220 and the battery cell 100.

[0031] In one embodiment of this utility model, the FPC flexible board 210 is connected to the busbar 220 via a connecting piece 212; the middle part of the busbar 220 is a flexible board connection part 223; the two sides of the flexible board connection part 223 are a positive electrode connection part 221 and a negative electrode connection part 222, respectively; the connecting piece 212 is connected to the flexible board connection part 223. The main function of the connecting piece 212 is to integrate the voltage on the busbar 220 and the FPC flexible board 210 together, ensuring that the voltage difference of each node in the entire circuit loop can be monitored. In one embodiment, the connecting piece 212 can be set as a fuse structure, for example, by making the width of the connecting piece 212 smaller. When an abnormal current occurs, a high temperature will be generated, thereby achieving the effect of melting the connecting piece 212 to protect the battery pack.

[0032] In one embodiment of this invention, a plurality of NTCs 213 are connected to the FPC flexible circuit board 210. The main function of the NTCs 213 is to monitor the temperature at different locations in the battery pack. In one embodiment, the NTCs 213 are preferably located close to the busbar 220.

[0033] In one embodiment of this utility model, at least one of the flexible adhesive films 230 is provided with a clearance hole 231 that mates with the NTC 213. The clearance hole 231 provides accommodating space for the installation of the NTC 213 and also assists in heat dissipation of the FPC flexible board 210 and the bus 220.

[0034] In one embodiment of this utility model, the flexible adhesive film 230 is provided with a positive electrode clearance hole 233 that mates with the positive electrode connection portion 221, and a negative electrode clearance hole 234 that mates with the negative electrode connection portion 222. The positive electrode clearance hole 233 and the negative electrode clearance hole 234 provide space for welding the busbar 220 to the battery cell 100. In one embodiment, the positive electrode clearance hole 233 is circular, and the negative electrode clearance hole 234 is oriented, making installation and positioning easier during assembly. The positive electrode clearance hole 233 and the negative electrode clearance hole 234 also assist in heat dissipation of the FPC flexible board 210 and the busbar 220, improving the heat dissipation capacity of the integrated motherboard 200.

[0035] In one embodiment of this utility model, the flexible adhesive film 230 is provided with a plurality of first positioning holes 232; the busbar 220 is provided with second positioning holes 224 that mate with the first positioning holes 232; and the FPC flexible board 210 is provided with third positioning holes 214 that mate with the second positioning holes 224. The positioning holes are mainly to ensure the assembly accuracy during the production process of the integrated busbar, and to ensure that the size and position of the entire integrated busbar meet the requirements.

[0036] In one embodiment of this utility model, the flexible adhesive film 230 is made of PET material. PET material provides good electrical insulation properties and also has certain mechanical protection properties, and can ensure the fixation of the relative position of the busbar 220 and the FPC flexible board 210 after connection.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A battery structure for rapid automated production, characterized in that: The system includes an integrated motherboard (200) electrically connected to several battery cells (100); a BMS main board (400) is provided at one end of the integrated motherboard (200) away from the battery cells (100); an insulating pad (300) is provided between the BMS main board (400) and the integrated motherboard (200); the integrated motherboard (200) includes a main body and a soft rubber film (230) covering both sides of the main body; the main body includes an FPC flexible board (210); several busbars (220) are connected to the FPC flexible board (210); the busbars (220) include a positive electrode connection part (221) for connecting to the positive electrode of the battery cell (100) and a negative electrode connection part (222) for connecting to the negative electrode of the battery cell (100); the positive electrode connection part (221) and the negative electrode connection part (222) are respectively connected to different battery cells (100).

2. The battery structure for rapid automated production according to claim 1, characterized in that: The FPC flexible board (210) includes an FPC connector (211); the BMS motherboard (400) is provided with an FPC female connector (410) connected to the FPC connector (211).

3. The battery structure for rapid automated production according to claim 2, characterized in that: The FPC female connector (410) is located on the side of the BMS motherboard (400) away from the integrated motherboard (200).

4. The battery structure for rapid automated production according to claim 1, characterized in that: The battery cell (100) includes a positive electrode (110) with one end protruding; the circumferential direction of the positive electrode (110) is the negative electrode (120); the positive electrodes (110) of several of the battery cells (100) are arranged on the same side; the negative electrode connection (222) extends away from the positive electrode connection (221) so that the positive electrode connection (221) and the negative electrode connection (222) are located on different planes respectively; the positive electrode connection (221) of the busbar (220) is connected to the positive electrode (110) of the battery cell, and the negative electrode connection (222) is connected to the negative electrode (120) of the adjacent battery cell (100).

5. The battery structure for rapid automated production according to claim 1, characterized in that: The FPC flexible board (210) is connected to the busbar (220) via a connecting piece (212); the middle part of the busbar (220) is the flexible board connection part (223); the two sides of the flexible board connection part (223) are the positive electrode connection part (221) and the negative electrode connection part (222), respectively; the connecting piece (212) is connected to the flexible board connection part (223).

6. The battery structure for rapid automated production according to claim 1, characterized in that: Several NTCs (213) are connected to the FPC flexible board (210).

7. A battery structure for rapid automated production according to claim 6, characterized in that: At least one of the soft rubber coatings (230) is provided with a relief hole (231) that mates with the NTC (213).

8. The battery structure for rapid automated production according to claim 1, characterized in that: The soft rubber coating (230) is provided with a positive electrode clearance hole (233) that cooperates with the positive electrode connection part (221) and a negative electrode clearance hole (234) that cooperates with the negative electrode connection part (222).

9. The battery structure for rapid automated production according to claim 1, characterized in that: The soft rubber coating (230) is provided with a plurality of first positioning holes (232); the busbar (220) is provided with second positioning holes (224) that cooperate with the first positioning holes (232); the FPC flexible board (210) is provided with third positioning holes (214) that cooperate with the second positioning holes (224).

10. A battery structure for rapid automated production according to any one of claims 1-9, characterized in that: The soft adhesive film (230) is made of PET material.

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