Battery pack voltage sampling board

Abstract

The utility model discloses a battery pack voltage sampling board, the sampling board comprises a sampling substrate, a sampling nickel strap, a jack and the like, the sampling substrate is a double-layer pcb board, a welding area is arranged on the sampling substrate, after the sampling nickel strap is vertically bent twice, one end of the sampling nickel strap is welded in the welding area of the sampling board, and the other end of the sampling nickel strap is welded in the welding area of the sampling board. And the other end is welded on the battery module aluminum strip. The sampling plate samples through the nickel strap and then transmits data to the interface through the wiring harness in the substrate, and the interface is directly connected with the BMS through the wiring harness, so that the risks of short circuit and even fire and explosion of the battery pack caused by external arrangement of the sampling wiring harness of the battery pack and friction damage with other parts can be effectively avoided, and meanwhile, the length of the wiring harness is reduced; and the precision of the battery pack sampling data is improved.

Description

[0001] manual Technical Field

[0002] The utility model relates to the technical field of battery pack sampling, in particular to a battery pack voltage sampling board. Background Art

[0003] With the development of various technologies and applications in the new energy sector and the acceleration of China's electrification efforts, lithium batteries are increasingly being used in industries such as consumer electronics, energy storage, and electric vehicles. Motorcycles, a type of two-wheeled vehicle, are also gradually entering the electrification era. However, the special characteristics of electric motorcycles place higher demands on the energy density and rate performance of battery packs. In addition, since the battery packs of electric motorcycles are exposed and can come into contact with the rider, they place even higher demands on high-voltage safety.

[0004] In existing technology, voltage sampling in electric motorcycle battery packs is typically achieved by welding wiring harnesses to tabs or connectors. This may require additional space in the battery pack to accommodate the voltage sampling wires, reducing the pack's energy density. Furthermore, a certain margin is typically left between the input and output ends of the sampling wires to protect them from damage during battery pack operation. However, friction between the wiring harness and other components can damage the wiring harness, leading to battery pack short circuits or even fire and explosion. This compromises the overall electrical safety of the battery pack, potentially damaging the battery pack at best and posing a life-threatening threat to the rider at worst. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a voltage sampling board which is simple in structure, safe and reliable, not prone to short circuit, and easy to connect.

[0006] To address the above technical issues, the present invention proposes a technical solution comprising a sampling substrate, a sampling nickel strip, and a connector. The sampling substrate is provided with a welding area, and rectangular notches are provided at both ends of the sampling substrate in the width direction. One end of the sampling nickel strip is welded to the sampling substrate, and the other end is welded to the battery module aluminum strip. A connector is provided adjacent to the rectangular notch.

[0007] Preferably, the sampling substrate is a double-layer PCB.

[0008] Preferably, the sampling nickel strip is welded to the aluminum strip after being bent twice, and both ends of the nickel strip are perpendicular to the middle section of the nickel strip.

[0009] Preferably, the welding area is a square boss structure.

[0010] Preferably, the sampling substrate is provided with fixing screw holes on both sides in the length direction, and the screw holes on both sides are arranged alternately.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] 1. The sampling nickel strip is bent vertically twice, one end welded to the sampling plate's welding area, and the other end welded to the battery module's aluminum strip. After the sampling plate samples the nickel strip, the data is transmitted to the connector via the baseplate's internal wiring harness. The connector is directly connected to the BMS via the wiring harness. This effectively avoids the risk of short circuits or even fire and explosion caused by friction and damage to the external battery pack sampling harness from other components. It also reduces the length of the wiring harness and improves the accuracy of the battery pack sampling data.

[0013] 2. The sampling plate is fixed to the battery pack tab bracket by screws, which improves the overall structural stability of the battery pack.

[0014] 3. The rectangular notches opened on both sides of the sampling substrate in the width direction provide placement for the positive and negative outputs of the battery pack, improving the space utilization and energy density of the battery pack. On the other hand, they provide stress release positions for the sampling board, which can improve the structural strength of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the battery pack voltage sampling board structure;

[0016] Main component symbols: 1. Sampling substrate, 2. Sampling nickel strip, 3. Rectangular notch, 4. Welding area, 5. Connector, 6. Fixing screw hole Specific embodiments

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] As shown in the accompanying drawings, the present application provides a battery pack voltage sampling board, comprising:

[0019] The sampling substrate, the sampling nickel strip, and the connector are provided with a welding area on the sampling substrate and rectangular notches at both ends of the sampling substrate in the width direction. One end of the sampling nickel strip is welded to the sampling substrate and the other end is welded to the battery module aluminum strip. The connector is provided next to the rectangular notch.

[0020] In this embodiment, the sampling substrate 1 utilizes a double-layer PCB with rectangular notches at either end along its width, providing locations for the battery pack's overall input and output. This reduces the overall weight of the voltage sampling board and, to a certain extent, improves the battery pack's energy density. The sampling substrate is provided with square welding areas on both sides of the substrate, corresponding to the position of the sampling nickel strip. This ensures the welding area and strength of the strip, improving sampling accuracy. Screw holes are provided on both sides of the sampling substrate along its length, corresponding to the position of the battery pack's tab bracket, for securing the sampling substrate to the tab bracket, further improving the battery pack's insulation performance. A connector is located next to the rectangular notch on the left side of the sampling substrate, which can be connected to the battery pack's battery management system for outputting sampling data.

[0021] In this embodiment, the sampling nickel strip 2 is evenly distributed along the length of the sampling substrate, with one end of the sampling nickel strip welded to the sampling substrate. The nickel strip is bent twice before being welded to the aluminum strip at the other end. Both ends of the nickel strip are perpendicular to the middle of the strip. This ensures smooth current flow and reduces sampling errors. Furthermore, it allows for a smooth transition from the sampling substrate platform to the aluminum strip welding platform, preventing the battery pack from pulling on the nickel strip during operation, which could cause the sampling nickel strip to become disconnected.

[0022] Rectangular notch 3 in this embodiment: Rectangular notches are provided on both sides of the sampling substrate in the width direction to provide placement positions for the positive input and negative output of the battery pack, which not only reduces the overall weight of the sampling plate and improves the energy density of the battery pack, but also serves as a stress release position for the entire sampling plate, thereby improving the structural strength of the sampling plate.

[0023] In this embodiment, welding area 4: a welding area is provided at the welding position of the nickel strip and the substrate. The welding area is a square boss structure. The nickel strip is welded to the welding area by soldering to ensure the welding area and welding strength of the nickel strip.

[0024] In this embodiment, connector 5 is located next to the rectangular notch on the left side of the sampling substrate. This placement facilitates connection to upper electrical components, improving battery pack space utilization. After the sampling substrate is sampled via the nickel strip, the data is aggregated to the connector via a wiring harness within the substrate. This approach simplifies the structure and reduces the risk of short circuits. The connector connects to the battery pack's BMS via a wiring harness to output the sampled data, avoiding sampling errors caused by excessive wiring.

[0025] In this embodiment, fixing screw hole 6: the sampling substrate is provided with fixing screw holes on both sides of the length direction according to the design of the battery pack tab bracket. The screw holes on both sides are staggered, and the sampling plate is fixed to the tab bracket through the screw holes to prevent the sampling plate from moving up and down and rotating, causing the sampling nickel belt connection to fall off, further increasing the overall structural stability and strength of the battery pack, while ensuring the overall electrical safety of the battery pack.

[0026] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details of the present invention are within the scope of protection of the present invention without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A battery pack voltage sampling board, comprising a sampling substrate, a sampling nickel strip, and a connector, characterized in that: A welding area is provided on the sampling substrate, and rectangular notches are provided at both ends of the sampling substrate in the width direction. One end of the sampling nickel strip is welded to the sampling substrate, and the other end is welded to the battery module aluminum strip. A connector is provided next to the rectangular notch.

2. The battery pack voltage sampling board according to claim 1, characterized in that: The sampling substrate adopts a double-layer PCB board.

3. The battery pack voltage sampling board according to claim 1, characterized in that: The sampling nickel strip is welded to the aluminum strip after being bent twice, and both ends of the nickel strip are perpendicular to the middle section of the nickel strip.

4. The battery pack voltage sampling board according to claim 1, characterized in that: The welding area is a square boss structure.

5. The battery pack voltage sampling board according to claim 1, characterized in that: The sampling base plate is provided with fixing screw holes on both sides in the length direction, and the screw holes on both sides are arranged alternately.

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