A positive and negative terminal contact for a battery module terminal board

Abstract

This application relates to a positive and negative electrode contact plate for a battery module contact plate, comprising a positive electrode contact plate and a negative electrode contact plate arranged in parallel. One end of the negative electrode contact plate is bent upward to form a transition connection portion that connects to the positive electrode contact plate, and the other end of the negative electrode contact plate has an upwardly curved inspection portion. This utility model belongs to the field of battery technology. Its integrated structure reduces welding processes, allows for rapid matching of positioning protrusions with contact plate holes, reduces installation time by more than 30%, and improves assembly efficiency. The arc-shaped concave surface of the negative electrode contact plate fully conforms to the positive electrode post, reducing contact resistance by 15%-20%. The vertical plate design of the transition connection portion disperses stress, improves vibration resistance, and enhances connection reliability. The grooved inspection portion allows for direct judgment of the connection status between the negative electrode contact plate and the negative terminal plate by applying tension with tools, avoiding potential loose connections. The stamping process simplifies the production process, achieving a material utilization rate of over 95%.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a positive and negative terminal contact for a battery module contact plate. Background Technology

[0002] In existing battery module manufacturing technologies, the positive and negative electrode contacts are typically designed as separate units. This design presents the following technical problems:

[0003] 1. Low assembly efficiency: The positive and negative terminals need to be installed and fixed separately, which increases the assembly process and time;

[0004] 2. Insufficient connection reliability: The split structure is prone to poor contact due to vibration or thermal deformation;

[0005] 3. Difficulty in quality inspection: There is a lack of effective means of detecting connection status, making it difficult to quickly determine whether the installation is in place.

[0006] To address the aforementioned issues, there is an urgent need to develop a novel positive and negative electrode contact structure to improve the assembly efficiency, connection reliability, and testing convenience of battery modules. Utility Model Content

[0007] Therefore, it is necessary to provide a positive and negative electrode connection structure, the specific technical solution of which is as follows.

[0008] A positive and negative electrode contact plate for a battery module contact plate includes a positive electrode contact plate and a negative electrode contact plate arranged in parallel. One end of the negative electrode contact plate is bent upward and has a transition connection portion that connects to the positive electrode contact plate. The positive electrode contact plate, the negative electrode contact plate and the transition connection portion are integrally stamped and formed. The other end of the negative electrode contact plate has an inspection portion that is raised upward.

[0009] Furthermore, the bottom surface of the inspection section is provided with a groove.

[0010] Furthermore, the inspection section and the groove are located at one corner of the end of the negative electrode contact piece, and the inspection section, the groove and the negative electrode contact piece are integrally stamped and formed.

[0011] Furthermore, the opposite ends of the positive and negative electrode contacts are provided with laser welding point holes.

[0012] Furthermore, the bottom surface of the positive electrode contact is provided with three positioning protrusions arranged in a triangle near the end of the negative electrode contact, and the positioning protrusions are adapted to the three positioning holes on the contact plate.

[0013] Furthermore, the transition connection portion is a vertical plate structure that is perpendicularly connected to the positive electrode contact and the negative electrode contact.

[0014] Furthermore, the positive and negative electrode contacts are thin sheet structures, the length of the negative electrode contact is smaller than the length of the positive electrode contact, and the thickness of the positive and negative electrode contacts is 0.5 mm to 1.5 mm.

[0015] Furthermore, the positive electrode contact is used to electrically connect to the positive electrode post at the top of the lithium battery, and the negative electrode contact is used to electrically connect to the negative electrode plate around the positive electrode post of the lithium battery.

[0016] Compared with existing technologies, this utility model has the following beneficial effects:

[0017] This utility model discloses positive and negative electrode contact pieces for battery module contact plates. The integrated structure reduces welding processes, and the positioning protrusions quickly match the holes on the contact plate, reducing installation time by more than 30% and improving assembly efficiency. Pre-set laser welding point holes prevent welding misalignment. The arc-shaped concave surface of the negative electrode contact piece fully conforms to the circumference of the positive electrode post, reducing contact resistance by 15%-20%. The transition connection plate design disperses stress, improves vibration resistance, and enhances connection reliability. The inspection groove allows for direct judgment of the connection status between the negative electrode contact piece and the negative terminal plate by applying tension with tools, avoiding potential loose connections. The stamping process simplifies the production process, achieving a material utilization rate of over 95%. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural view of the positive and negative terminal contact plates for the battery module contact plate of this utility model.

[0020] Figure 2 This is a front view of the structure of the positive and negative terminal contact pieces for the battery module contact plate of this utility model;

[0021] Figure 3 This is a top view of the structure of the positive and negative terminal contact plates for the battery module contact plate of this utility model;

[0022] Figure 4 This is a schematic diagram illustrating the installation of the positive and negative terminal contacts of the battery module terminal board, connecting them to the terminal board and the lithium battery.

[0023] Explanation of reference numerals in the attached drawings: 1. Positive electrode contact; 2. Negative electrode contact; 3. Transition connection; 4. Inspection section; 5. Groove; 6. Laser welding point hole; 7. Positioning protrusion; 8. Arc-shaped concave surface; 100. Lithium battery; 101. Negative terminal plate; 102. Positive electrode post. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] The embodiments of this utility model will be described below based on its overall structure.

[0026] Reference Figures 1-4 As shown, this embodiment provides positive and negative electrode contact pieces for a battery module contact plate, including a positive electrode contact piece 1 and a negative electrode contact piece 2 arranged in parallel. One end of the negative electrode contact piece 2 is bent upward and has a transition connection part 3 connected to the positive electrode contact piece 1. The positive electrode contact piece 1, the negative electrode contact piece 2 and the transition connection part 3 are integrally stamped and formed. The other end of the negative electrode contact piece 2 is provided with an inspection part 4 for checking whether the negative electrode contact piece is firmly connected to the negative end plate 101 of the lithium battery 100. The positive electrode contact piece 1 is used to fit and connect with the top surface of the positive electrode contact post 102 at the top of the lithium battery 100, and the negative electrode contact piece 2 is used to fit and connect with the negative end plate 101 around the positive electrode contact post 102 of the lithium battery 100, and is fixed by laser welding.

[0027] The positive and negative electrode contacts of this utility model are integrally stamped, reducing welding processes and improving assembly efficiency. The inspection unit 4 can apply upward pulling force with tools to intuitively judge the connection status between the negative electrode contact 2 and the negative terminal plate 101, avoiding the risk of loose connection. The integral stamping process simplifies the production process and the material utilization rate reaches more than 95%.

[0028] Specifically, refer to Figure 1 As shown, the bottom surface of the inspection section 4 is provided with a hook groove 5. Workers can use a pry bar or their fingernails to hook the hook groove 5 and then pry upwards to check whether the negative electrode contact 2 is firmly connected to the negative terminal plate 101 of the lithium battery.

[0029] Specifically, refer to Figure 1 As shown, the inspection section 4 and the groove 5 are located at one corner of the end of the negative electrode contact 2, and the inspection section 4, the groove 5 and the negative electrode contact 2 are integrally stamped structures.

[0030] Specifically, refer to Figure 1-3 As shown, the opposite ends of the positive electrode contact 1 and the negative electrode contact 2 are provided with laser welding point holes 6. The end face of the negative electrode contact 2 is provided with an arc-shaped concave surface 8, which is adapted to the cylindrical surface of the positive electrode contact post 102.

[0031] Specifically, refer to Figure 2-4 As shown, the bottom surface of the positive electrode contact 1, near the end of the negative electrode contact 2, has three triangularly distributed positioning protrusions 7, which are adapted to the three positioning holes on the junction plate 200. The positive electrode contact 1 and the junction plate 200 are positioned at three points, which is quick and avoids relative sliding when the positive electrode contact 1 and the junction plate 200 are bonded with glue or zinc alloy liquid adhesive.

[0032] Specifically, refer to Figure 1-4 As shown, the transition connection part 3 is a vertical plate structure that is perpendicularly connected to the positive electrode contact 1 and the negative electrode contact 2.

[0033] Specifically, refer to Figure 1-4 As shown, the positive electrode contact 1 and the negative electrode contact 2 are thin sheet structures. The length of the negative electrode contact 2 is smaller than that of the positive electrode contact 1, and the thickness of the positive electrode contact 1 and the negative electrode contact 2 is 0.5 mm to 1.5 mm.

[0034] Working principle:

[0035] Installation phase: Positive electrode contact 1 is fixed to the contact plate 200 via positioning protrusion 7, and positive electrode contact 1 is fixedly connected to the top surface of positive electrode contact post 102 by laser welding; negative electrode contact 2 is attached to the negative terminal plate 101 of the next lithium battery 100 and fixedly connected by laser welding, and multiple contact pieces are connected to multiple lithium batteries 100 to connect the lithium batteries in series.

[0036] Inspection stage: Use the tool to pull the groove 5 of the inspection section. If the negative terminal piece 2 does not move, the connection is confirmed to be firm; if it is loose, it needs to be re-crimped.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A positive and negative terminal contact for a battery module contact plate, characterized in that, It includes a positive electrode contact (1) and a negative electrode contact (2) arranged in parallel. One end of the negative electrode contact (2) is bent upward and has a transition connection part (3) connected to the positive electrode contact (1). The positive electrode contact (1), the negative electrode contact (2) and the transition connection part (3) are integrally stamped and formed. The other end of the negative electrode contact (2) has an inspection part (4) that is raised upward.

2. The positive and negative terminal contact plates for a battery module contact plate according to claim 1, characterized in that, The bottom surface of the inspection section (4) is provided with a groove (5).

3. The positive and negative terminal contact plates for a battery module contact plate according to claim 2, characterized in that, The inspection section (4) and the groove (5) are located at one corner of the end of the negative electrode contact (2), and the inspection section (4), the groove (5) and the negative electrode contact (2) are integrally stamped and formed.

4. The positive and negative terminal contact plates for a battery module contact plate according to claim 3, characterized in that, The opposite ends of the positive electrode contact (1) and the negative electrode contact (2) are provided with laser welding point holes (6).

5. A positive and negative terminal contact piece for a battery module contact plate according to any one of claims 1-4, characterized in that, The bottom surface of the positive electrode contact (1) near the end of the negative electrode contact (2) is provided with three positioning protrusions (7) arranged in a triangle. The positioning protrusions (7) are adapted to the three positioning holes on the contact plate (200).

6. The positive and negative terminal contacts for a battery module contact plate according to claim 5, characterized in that, The transition connection part (3) is a vertical plate structure that is perpendicularly connected to the positive electrode contact (1) and the negative electrode contact (2).

7. The positive and negative terminal contacts for a battery module contact plate according to claim 5, characterized in that, The positive electrode contact (1) and the negative electrode contact (2) are thin sheet structures. The length of the negative electrode contact (2) is smaller than that of the positive electrode contact (1). The thickness of the positive electrode contact (1) and the negative electrode contact (2) is 0.5 mm to 1.5 mm.

8. The positive and negative terminal contacts for a battery module contact plate according to claim 7, characterized in that, The positive electrode contact (1) is used to electrically connect to the positive electrode terminal (102) at the top of the lithium battery (100), and the negative electrode contact (2) is used to electrically connect to the negative electrode plate (101) around the positive electrode terminal (102) of the lithium battery (100).

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