Copper bar connecting piece for battery pack

Abstract

The utility model discloses a copper bar connecting piece for a battery pack, which comprises a copper bar body, the copper bar body comprises a confluence section and fixed sections arranged at two ends of the confluence section, at least one side of the confluence section is provided with a confluence assembly, the confluence assembly comprises a substrate, an extension plate and a conductive wire row, one end of the base plate is welded on the confluence section, the extension plates are welded on the upper side and the lower side of the other end of the base plate, a plug-in channel is arranged between the extension plates, the conductive wire row is connected to one side, close to the plug-in channel, of each extension plate, and the conductive wire row comprises a protruding part protruding towards the plug-in channel. An inserting gap is formed between the upper protruding part and the lower protruding part. According to the utility model, the conductive wire row is in interference contact fit with the conductive sheets, so that the conductive stability between the conductive sheets of the battery cell group and the copper bar connecting piece main body is still ensured when an automobile is driven for a long time, and the battery failure risk caused by looseness of the bus junction of the automobile battery cells is avoided.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a copper busbar connector for a battery pack. Background Technology

[0002] New energy vehicles are an important direction for the development of the new energy industry. Nowadays, each battery module in a new energy vehicle is composed of multiple cells (battery packs) connected in series and parallel. The cells of the same module are connected in series and parallel and then aggregated onto the copper busbar conductor.

[0003] Currently, the positive and negative terminals of battery cells are connected to the copper busbar conductors using fasteners. For example, Chinese patent CN216289444U discloses a copper busbar structure for new energy vehicles, which has a bent strip on one side of the straight strip for current collection. The bent strip is connected to the conductive sheet on the battery cell to achieve current collection. For new energy vehicles, long-term driving vibration may cause the busbar connection to loosen, resulting in poor connection stability, localized overheating, and even easily leading to vehicle battery system failure.

[0004] In view of this, there is an urgent need to design a new type of copper busbar connector for battery packs. Summary of the Invention

[0005] To solve the above problems, the technical solution provided by this utility model is as follows:

[0006] A copper busbar connector for a battery pack includes a copper busbar body, the copper busbar body including a busbar section and fixed sections disposed at both ends of the busbar section, a busbar assembly provided on at least one side of the busbar section, the busbar assembly including a substrate, an extension plate and a conductive wire bar, one end of the substrate being welded to the busbar section, the other end of the substrate having the extension plate welded to both the upper and lower sides, an insertion channel being provided between the extension plates, the conductive wire bar being connected to the side of the extension plate near the insertion channel, the conductive wire bar including a protrusion rising towards the insertion channel, and an insertion gap being provided between the upper and lower protrusions.

[0007] The present invention is further configured such that the extension plate includes a fixed section, a recessed section and a supporting section in sequence, the fixed section is welded to the other end of the substrate, one end of the conductive wire array is connected to the supporting section, and the other end of the conductive wire array is connected to the supporting section.

[0008] The present invention is further configured such that the conductive wire bus includes a barb portion, a guide portion and an abutment portion, the guide portion is disposed near the barb portion, the protrusion portion is located between the guide portion and the abutment portion, the bearing section is provided with a slot at one end away from the copper bus body, the barb portion is connected in the slot, and the abutment portion abuts against the inner side of the recessed section.

[0009] The present invention is further configured such that at least two protrusions are provided, and a flat portion is provided between the protrusions, the flat portion being fitted to the inner side of the bearing section.

[0010] The present invention is further configured such that the conductive wire array is composed of several conductive wires whose head and tail ends are welded together.

[0011] The present invention is further configured such that the conductive wire bar is made of copper-based elastic alloy material.

[0012] The present invention is further configured such that the substrate and the fixed section, as well as the substrate and the extension plate, are connected by ultrasonic welding.

[0013] The present invention is further provided with a positioning hole on the fixed section.

[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0015] The connection method of the copper busbar connector for the battery pack in this technical solution is as follows: place the copper busbar body on the mounting base, then insert the conductive lead-out ends of each cell group into the insertion gap of the busbar assembly, and finally fasten the fixing section on the mounting base to complete the busbar connection of the cell group.

[0016] In this utility model, the welding between the busbar section, the base plate, and the extension plate in the copper busbar connector ensures the consistency of the main body of the copper busbar connector in terms of mechanical structure and electrical connection. By setting elastic conductive wires on the extension plate, after the conductive sheet of the battery cell is inserted into the insertion gap, the conductive wires make an interference contact fit with the conductive sheet. Even during long-term driving of the car, the conductivity stability between the conductive sheet of the battery cell and the main body of the copper busbar connector is guaranteed, avoiding the risk of battery failure caused by loosening of the busbar connection of the car battery cell. Attached Figure Description

[0017] Figure 1 This is a perspective view of the copper busbar connector according to an embodiment of the present utility model.

[0018] Figure 2 This is a perspective view of the busbar assembly according to an embodiment of the present utility model.

[0019] Figure 3 This is a cross-sectional view of the bus assembly according to an embodiment of the present utility model.

[0020] Figure 4 This is a perspective view of the extension plate and conductive wire array in an embodiment of this utility model. Detailed Implementation

[0021] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to fixed connections, integral connections, or detachable connections; they can refer to mechanical connections or electrical connections, or internal connections between two components; they can refer to direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Combined with appendix Figure 1 To be continued Figure 4 This utility model provides a copper busbar connector for a battery pack, comprising a copper busbar body 1. The copper busbar body 1 includes a busbar section 11 and fixed sections 12 disposed at both ends of the busbar section 11. At least one side of the busbar section 11 is provided with a busbar assembly 2. The busbar assembly 2 includes a substrate 21, an extension plate 22, and a conductive wire busbar 23. One end of the substrate 21 is welded to the busbar section 11, and the extension plate 22 is welded to both the upper and lower sides of the other end of the substrate 21. An insertion channel 24 is provided between the extension plates 22. The conductive wire busbar 23 is connected to the side of the extension plate 22 near the insertion channel 24. The conductive wire busbar 23 includes a protrusion 231 that protrudes toward the insertion channel 24, and an insertion gap 25 is provided between the upper and lower protrusions 231.

[0025] In this embodiment, the welding between the busbar section 11, the substrate 21, and the extension plate 22 in the copper busbar connector ensures the consistency of the main body of the copper busbar connector in terms of mechanical structure and electrical connection. By setting elastic conductive wires 23 on the extension plate 22, after the conductive sheet of the battery cell group is inserted into the insertion gap 25, the conductive wires 23 are used to make an interference contact with the conductive sheet to realize the electrical connection of the battery cell group when it is connected. Moreover, the elastic conductive wires 23 are clamped on both sides of the conductive sheet, so that the stability of the battery cell group connection is always guaranteed after long-term driving of the new energy vehicle and under harsh driving conditions.

[0026] In this embodiment, the extension plate 22 is symmetrically arranged on both sides of the substrate 21; the conductive wire array 23 is also symmetrically arranged on both sides of the substrate 21.

[0027] In this embodiment, the extension plate 22 includes a fixing section 221, a recessed section 222 and a supporting section 223 in sequence. The fixing section 221 is welded to the other end of the substrate 21. One end of the conductive wire row 23 is connected to the supporting section 223, and the other end of the conductive wire row 23 is connected to the supporting section 223.

[0028] In this embodiment, the bearing section 223 is used to support the main body of the conductive wire bar 23, and the recessed section 222 is used to provide a pressure support point to one end of the conductive wire bar 23 to ensure the stability of the connection of the conductive wire bar 23 on the extension plate 22.

[0029] In this embodiment, the conductive wire busbar 23 includes a barb portion 232, a guide portion 233, and an abutment portion 234. The guide portion 233 is disposed close to the barb portion 232. The protrusion portion 231 is located between the guide portion 233 and the abutment portion 234. The bearing section 223 has a slot 224 at one end away from the copper busbar body 1. The barb portion 232 is connected in the slot 224. The abutment portion 234 abuts against the inner side of the recessed section 222.

[0030] In this embodiment, the guide portion 233 provides guidance when the connecting piece of the external battery cell assembly is inserted; the barb portion 232 is fixed in the slot 224 for positioning the conductive wire array 23; and the protrusion portion 231 is used to clamp the connecting piece of the external battery cell assembly.

[0031] In this embodiment, at least two protrusions 231 are provided, and a flattening portion 235 is provided between the protrusions 231. The flattening portion 235 is attached to the inner side of the bearing section 223. Multiple protrusions 231 can increase the contact area, and the flattening portion 235 can allow the conductive wire array 23 to rest more stably against the bearing section 223.

[0032] In this embodiment, the conductive wire array 23 is formed by welding the ends of several conductive wires together. The middle parts of the conductive wires are independent of each other, so that even if the conductive sheets of the battery cell assembly are not flat, the conductive contact area of ​​the current convergence can be ensured.

[0033] In this embodiment, the conductive wire bar 23 is made of copper-based elastic alloy material, such as tin phosphor bronze or beryllium bronze, which has the characteristics of good conductivity and excellent elasticity.

[0034] In this embodiment, the substrate 21 and the fixed section 12, as well as the substrate 21 and the extension plate 22, are connected by ultrasonic welding.

[0035] In this embodiment, a positioning hole 13 is provided on the fixed section 12, and the positioning hole 13 is used for conductive connection of the copper busbar body.

[0036] The connection method of the copper busbar connector in this embodiment is as follows: place the copper busbar body 1 on the mounting base, then insert the conductive lead-out ends of each battery cell group into the insertion gap 25 of the busbar assembly 2, and finally fasten the fixing section 12 on the mounting base to complete the busbar connection of the battery cell group.

[0037] This embodiment utilizes the interference contact fit between the conductive wire busbar and the conductive sheet to ensure the conductivity stability between the conductive sheet of the battery cell and the main body of the copper busbar connector even during long-term driving of the car, thus avoiding the risk of battery failure caused by loosening of the busbar connection of the car battery cell.

[0038] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A copper busbar connector for a battery pack, characterized in that, The device includes a copper busbar body, which includes a busbar section and fixed sections disposed at both ends of the busbar section. At least one side of the busbar section is provided with a busbar assembly. The busbar assembly includes a substrate, an extension plate, and a conductive wire bar. One end of the substrate is welded to the busbar section, and the extension plate is welded to both the upper and lower sides of the other end of the substrate. An insertion channel is provided between the extension plates. The conductive wire bar is connected to the side of the extension plate near the insertion channel. The conductive wire bar includes a protrusion that rises toward the insertion channel, and an insertion gap is provided between the upper and lower protrusions.

2. The copper busbar connector for a battery pack according to claim 1, characterized in that, The extension plate includes a fixed section, a recessed section and a support section in sequence. The fixed section is welded to the other end of the substrate. One end of the conductive wire array is connected to the support section, and the other end of the conductive wire array is connected to the support section.

3. A copper busbar connector for a battery pack according to claim 2, characterized in that, The conductive wire busbar includes a barb portion, a guide portion, and an abutment portion. The guide portion is disposed near the barb portion, and the protrusion portion is located between the guide portion and the abutment portion. The bearing section has a slot at one end away from the copper busbar body, the barb portion is connected in the slot, and the abutment portion abuts against the inner side of the recessed section.

4. A copper busbar connector for a battery pack according to claim 3, characterized in that, At least two protrusions are provided, and a flat portion is provided between the protrusions, the flat portion being fitted to the inner side of the bearing section.

5. A copper busbar connector for a battery pack according to claim 3, characterized in that, The conductive wire array is composed of several conductive wires welded together at their ends.

6. A copper busbar connector for a battery pack according to any one of claims 1 to 5, characterized in that, The conductive wire array is made of copper-based elastic alloy material.

7. A copper busbar connector for a battery pack according to any one of claims 2 to 5, characterized in that, The substrate and the fixed section, as well as the substrate and the extension plate, are connected by ultrasonic welding.

8. A copper busbar connector for a battery pack according to any one of claims 1 to 5, characterized in that, The fixed section is provided with positioning holes.

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