Repair structure applied to battery module

Abstract

According to the repair structure applied to the battery module, the battery module comprises a plurality of mutually connected battery cells and an acquisition board, and the acquisition board comprises an acquisition circuit board, a connecting bar, an acquisition nickel sheet and a connector; at least one connecting site needing to be repaired exists between the battery cell and the collecting plate, the repairing structure comprises a transmission wire harness, the transmission wire harness is connected with a connector, a plurality of fly wires are connected to the transmission wire harness, and the other ends of the fly wires are connected with replacing nickel pieces. And the replacement nickel sheet is detachably connected with the output pole and the connection bar at the connection site needing to be repaired through a threaded fastener. According to the utility model, the high-voltage connecting bar, the nickel sheet and the output electrode are electrically connected with the nickel sheet through the threaded fastener and the fly wire by wire cutting and crimping, so that the laser welding process of CCS is cancelled, the repair difficulty of the battery module is reduced, the assembly process during maintenance is reduced, the fixing effect is good, and the replacement of parts is more convenient.

Description

Technical Field

[0001] This utility model relates to the fields of new energy power and energy storage battery technology, and in particular to a repair structure for battery modules. Background Technology

[0002] With the rapid development of the new energy market, the demand for power and energy storage batteries is increasing. In the existing technology, welding defects are prone to occur during the acquisition process. If the CCS components cannot be repaired, the battery module or the entire battery pack will be scrapped, resulting in excessive costs. The current common method is to disassemble the entire CCS and re-weld it. However, the disassembly process is prone to causing secondary damage to the acquisition board, making repair difficult and increasing the risk of scrapping the battery module.

[0003] In the current market demand, in order to address the problem of rework of battery modules due to poor welding, there is a need for a simple rework structure for battery modules that can reduce the risk of rework. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to design a rework structure for battery modules, which eliminates the laser welding process of CCS during the rework process, reduces the difficulty of rework, improves the rework efficiency, and reduces the scrap rate of battery modules.

[0005] To achieve the above objectives, this utility model provides a rework structure for a battery module. The battery module includes several interconnected battery cells and a data acquisition board. The data acquisition board includes a data acquisition circuit board, a connector, a data acquisition nickel plate, and a connector. The connector is connected to the output terminal of the battery cell. One end of the connector is connected to the data acquisition circuit board via the data acquisition nickel plate. One end of the data acquisition circuit board is connected to the connector, which includes a plug-in end. There is at least one connection point between the battery cell and the data acquisition board that needs to be reworked. The rework structure includes a transmission harness connected to the connector. Several flying wires are connected to the transmission harness. The other end of each flying wire is connected to a replacement nickel plate. The replacement nickel plate is detachably connected to the output terminal and the connector at the connection point that needs to be reworked via threaded fasteners.

[0006] Furthermore, the replacement nickel sheet is provided with a first through hole, the connecting bar is provided with a second through hole corresponding to the first through hole, the output pole is provided with a threaded hole corresponding to the threaded fastener, and the threaded fastener passes through the second through hole and the first through hole in sequence and is threadedly connected to the threaded hole.

[0007] Furthermore, the end of the connector furthest from the plug end is electrically connected to the transmission harness.

[0008] Furthermore, the replacement nickel sheet and the flying wire are joined by wire cutting and crimping.

[0009] After adopting the above technical solution, the beneficial effects of this utility model are as follows: The battery module repair structure of this utility model electrically connects the connecting strip, replacement nickel sheet and output electrode at the connection point that needs to be repaired through threaded fasteners, and uses a flying wire to electrically connect with the replacement nickel sheet through wire cutting and crimping. The other end of the flying wire is short-circuited to the transmission harness, thereby eliminating the disassembly and reassembly and laser welding process in the CCS module repair process, reducing the repair difficulty, making it more convenient to replace parts, improving the repair yield, saving time and reducing assembly steps. Attached Figure Description

[0010] Figure 1 This is a front view of the battery module repair structure according to an embodiment of the present utility model;

[0011] Figure 2 This is a split diagram of the battery module repair structure according to an embodiment of the present utility model;

[0012] Figure 3 This is a schematic diagram of the data acquisition board structure of the battery module repair structure according to an embodiment of this utility model.

[0013] The attached diagram is labeled as follows: 1. Flying wire; 2. Replacement nickel sheet; 21. First through hole; 3. Threaded fastener; 4. Acquisition board; 41. Acquisition circuit board; 42. Aluminum busbar; 43. Acquisition nickel sheet; 44. Connector; 45. High voltage connection busbar; 5. Output pole; 51. Screw hole; 6. Transmission harness. Detailed Implementation

[0014] The technical solution of this utility model will be further described below through embodiments:

[0015] like Figures 1-3As shown, this utility model provides a repair structure for a battery module. The battery module includes several interconnected battery cells and a data acquisition board 4. The data acquisition board 4 includes a data acquisition circuit board 41, a connecting strip, a data acquisition nickel plate 43, and a connector 44. The connecting strip is connected to the output terminal 5 of the battery cell. One end of the connecting strip is connected to the data acquisition circuit board 41 through the data acquisition nickel plate 43. One end of the data acquisition circuit board 41 is connected to the connector 44, which includes a plug-in end. There is at least one connection point between the battery cell and the data acquisition board 4 that needs to be repaired. The repair structure includes a transmission harness 6, which is connected to the connector 44. Several flying wires 1 are connected to the transmission harness 6. The other end of each flying wire 1 is connected to a replacement nickel plate 2. The replacement nickel plate 2 is detachably connected to the output terminal 5 and the connecting strip at the connection point that needs to be repaired via a threaded fastener 3. The replacement nickel sheet 2 has a first through hole 21, the connecting busbar has a second through hole corresponding to the first through hole 21, and the output electrode 5 has a screw hole 51 corresponding to the threaded fastener 3. The threaded fastener 3 passes through the second through hole and the first through hole 21 in sequence and is threadedly connected to the screw hole 51. When there is a connection point with poor connection between the battery cell and the acquisition board 4, a transmission harness 6 is first connected to the connector 44, and then the replacement nickel sheet 2 used for repair is short-circuited to the transmission harness 6 through the flying wire 1. This eliminates the welding between the replacement nickel sheet 2 and the acquisition circuit board 41 during the rework process, and the original acquisition nickel sheet 43 can be retained without disassembly during rework. The replacement nickel sheet 2 is fixed by the threaded fastener 3 to electrically connect to the connecting busbar and the output electrode 5 at the connection point that needs to be repaired, further eliminating the welding between the replacement nickel sheet 2 and the connecting busbar, reducing the difficulty of rework, and improving the rework yield.

[0016] In this embodiment, the replacement nickel sheet 2 can be either a temperature-sensing nickel sheet or a voltage-sensing nickel sheet. The type of replacement nickel sheet 2 can be selected based on the type of sensing nickel sheet 43 at the connection point to be repaired.

[0017] More specifically, the end of connector 44 furthest from the insertion end is electrically connected to the transmission harness 6. Replacement nickel plate 2 transmits the acquired information to connector 44 through transmission harness 6, eliminating the need to solder replacement nickel plate 2 to acquisition circuit board 41, thus reducing the difficulty of rework.

[0018] Specifically, the connecting bus includes an aluminum bus 42 and a high-voltage connecting bus 45. The temperature sensing nickel strip is electrically connected to the aluminum bus 42, and the voltage acquisition nickel strip is electrically connected to the high-voltage connecting bus 45.

[0019] During battery module production, if the temperature-sensing or voltage-collecting nickel strips on the connector are poorly soldered, there is no need to disassemble and resolder them. Instead, the replacement nickel strip 2 is directly connected to the transmission harness 6 via a flying wire 1, and then the replacement nickel strip 2 is electrically connected to the output terminal 5 and the connector at the connection point requiring repair via a threaded fastener 3. At this point, the replacement nickel strip 2 collects temperature or voltage data, and the flying wire 1 continues to transmit the temperature or voltage data to the battery BMS via the transmission harness 6 and connector 44. This design avoids laser welding between the replacement nickel strip 2 and the data acquisition circuit board 41, as well as welding between the replacement nickel strip 2 and the connector, resulting in better fixation, easier component replacement, reduced production scrap rate, and fewer assembly steps.

[0020] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rework structure for a battery module, the battery module comprising a plurality of interconnected battery cells and a data acquisition board, the data acquisition board comprising a data acquisition circuit board, a connecting strip, a data acquisition nickel plate, and a connector, the connecting strip being connected to the output terminal of the battery cells, one end of the connecting strip being connected to the data acquisition circuit board via the data acquisition nickel plate, and one end of the data acquisition circuit board being connected to the connector, the connector comprising a plug-in terminal; characterized in that: There is at least one connection point that needs to be repaired between the battery cell and the acquisition board. The repair structure includes a transmission harness connected to the connector. Several flying wires are connected to the transmission harness. The other end of the flying wires is connected to a replacement nickel plate. The replacement nickel plate is detachably connected to the output electrode and the connector at the connection point that needs to be repaired via threaded fasteners.

2. The rework structure for battery modules according to claim 1, characterized in that: The replacement nickel sheet is provided with a first through hole, the connecting bar is provided with a second through hole corresponding to the first through hole, the output pole is provided with a threaded hole corresponding to the threaded fastener, and the threaded fastener passes through the second through hole and the first through hole in sequence and is threadedly connected to the threaded hole.

3. The rework structure for battery modules according to claim 1, characterized in that: The end of the connector furthest from the plug end is electrically connected to the transmission harness.

4. The rework structure for battery modules according to claim 1, characterized in that: The replacement nickel sheet and the flying wire are connected by wire cutting and crimping.

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