Lithium battery module sampling unit

Abstract

The utility model relates to a lithium battery module sampling unit which comprises a main board frame provided with a wiring harness groove, a sampling wiring harness is arranged in the wiring harness groove, pole piece holes are formed in the two sides of the wiring harness groove, the pole piece holes comprise a positive pole hole, a negative pole hole and multiple groups of double holes, and a first frame is arranged between two single holes; the anode hole and the cathode hole are distributed at the left end and the right end of one side of the wire harness groove; a second frame is arranged around the anode hole or the cathode hole; n groups of double holes are uniformly distributed between the positive electrode hole and the negative electrode hole, and N + 1 groups of double holes are uniformly distributed on the other side of the wire harness groove; the positive hole is provided with a positive plate, the negative hole is provided with a negative plate, and the double holes are provided with conductive plates; and the positive plate, the negative plate and the conductive plate are respectively connected with the sampling wire harness. The device is compact in structure and reasonable in design; the electrode plate holes of the main plate frame and the positioning grooves formed in the back face are matched with the lithium battery module detection device, the welding quality of all electrode plates can be detected at a time, detection is rapid and accurate, the production efficiency is greatly improved, and the product quality can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery modules, and particularly to a sampling unit of a lithium battery module. Background Art

[0002] The lithium battery module is a key component of the power battery pack of an electric vehicle and is very important for the safety monitoring of the electric vehicle. When the power battery pack encounters overcharging, over-discharging and other situations, the service life of each battery cell will be shortened. Sometimes, due to poor contact of the connecting wires or insecure welding of the electrode plates, the battery pack will overheat, and even thermal runaway will occur, endangering the safety of the vehicle and the occupants.

[0003] The lithium battery module monitors and manages the state of the power battery pack through a battery management system (BMS) and a sampling unit. The sampling unit of the lithium battery module generally includes a main board frame in the shape of a plate. Components such as sampling wire harnesses, electrode plates, and temperature sensors are arranged on the surface of the main board frame. The electrode plates include positive electrode plates and negative electrode plates. During the manufacturing process, the connecting pieces of the sampling wire harnesses are usually welded to the electrode plates by laser welding. Since it is difficult to completely avoid phenomena such as virtual soldering and insecure welding during mass production, it is necessary to detect the welding quality of each electrode plate of the sampling unit of the lithium battery module.

[0004] At present, the manufacturing factory of the sampling unit of the lithium battery module generally uses a wire harness continuity tester to detect the welding quality of the electrode plates. During the detection process, since there are multiple groups of electrode plates in the sampling unit, the operator needs to connect the wires, conduct power measurement, and disassemble the wires for all the electrode plates of the sampling unit one by one. This detection method has a large workload, takes a long time, and has low efficiency. Sometimes, there will be missed detections of individual electrode plates, which will pose potential risks to the product quality and the safety of the battery pack. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a sampling unit of a lithium battery module, which has a compact structure and reasonable design, and realizes the efficient detection of the welding quality of the electrode plates of the sampling unit of the lithium battery module by matching with a lithium battery module detection device through the positioning grooves arranged on the back of the main board frame.

[0006] The purpose of the utility model is realized by adopting the following technical solutions:

[0007] A sampling unit of a lithium battery module includes a main board frame in a rectangular shape. A horizontally arranged wire harness groove is provided at the center position of the upper surface of the main board frame, and a sampling wire harness is arranged in the wire harness groove;

[0008] A plurality of pole piece holes are opened on both sides of the wire harness groove. The pole piece holes include positive pole holes, negative pole holes and multiple groups of double holes. Each group of double holes is composed of two single holes, and a first frame is arranged between the two single holes;

[0009] The positive electrode holes and negative electrode holes are distributed at the end of one side of the wire harness groove, and the periphery of the positive electrode hole or negative electrode hole is set as a second frame;

[0010] On one side of the wire harness groove where the positive electrode holes and negative electrode holes are located, there are N groups of double holes, and on the other side of the wire harness groove, N + 1 groups of double holes are evenly distributed;

[0011] The positive electrode hole is provided with a positive electrode sheet, the negative electrode hole is provided with a negative electrode sheet, and the double hole is provided with a conductive electrode sheet;

[0012] The positive electrode sheet, negative electrode sheet and conductive electrode sheet are respectively connected to the sampling wire harness.

[0013] As a preferred technical solution of the present utility model, the sampling wire harness is composed of multiple wires, and connection pieces are provided at the ends of each wire;

[0014] On the surfaces of the positive electrode sheet, negative electrode sheet and conductive electrode sheet, there are sheet grooves matching the connection pieces respectively, and the connection pieces are welded to the sheet grooves.

[0015] As a preferred technical solution of the present utility model, multiple convex points are provided on the surface of the connection piece.

[0016] As a preferred technical solution of the present utility model, the conductive electrode sheet is set in a rectangular shape, a longitudinally arranged groove is provided in the middle of the conductive electrode sheet, two mounting holes are provided in the groove, and a pair of through holes are symmetrically provided on both sides of the groove;

[0017] The first frame is provided with two mounting posts matching the mounting holes of the conductive electrode sheet, and the conductive electrode sheet is connected and fixed to the first frame through the mounting posts.

[0018] As a preferred technical solution of the present utility model, two pairs of mounting posts are symmetrically provided on both sides of the second frame, the positive electrode sheet and the negative electrode sheet are respectively provided with mounting holes matching the mounting posts, and the positive electrode sheet and the negative electrode sheet are respectively connected and fixed to the second frame through the mounting posts.

[0019] As a preferred technical solution of the present utility model, the positive electrode sheet and the negative electrode sheet are respectively provided with two connecting bolts.

[0020] As a preferred technical solution of the present utility model, multiple groups of buckles for mounting and fixing the sampling wire harness are symmetrically provided on both sides of the wire harness groove.

[0021] As a preferred technical solution of the present utility model, a plurality of sensor wire holes are evenly distributed in the middle of the wire harness groove.

[0022] As a preferred technical solution of the present utility model, a positioning groove matching the lithium battery module detection device is provided on the lower surface of the main board frame.

[0023] As a preferred technical solution of the present utility model, N is equal to 3 or 4; the positive electrode holes and the negative electrode holes are distributed at the left and right ends on one side of the wire harness groove.

[0024] The beneficial effects of the present utility model: Compared with the prior art, the structure of the present utility model is compact and reasonably designed; through the electrode sheet holes on the main board frame and the positioning grooves provided on the back surface, it cooperates with the lithium battery module detection device to realize the one-time detection of the welding quality of all electrode sheets, which is not only fast and accurate in detection, greatly improves the production efficiency, but also can effectively improve the product quality. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the main board frame of the present utility model;

[0026] Figure 2 is Figure 1 the left view structural diagram of

[0027] In the figure: 1. Main board frame, 2. Wire harness groove, 3. Positive electrode hole, 4. Negative electrode hole, 5. Double holes, 6. First frame, 7. Second frame, 8. Positive electrode sheet, 9. Negative electrode sheet, 10. Conductive electrode sheet, 11. Buckle, 12. Wire hole. Specific Embodiments

[0028] The following further describes the present utility model in conjunction with the drawings and specific embodiments:

[0029] As Figure 1 and Figure 2 shown, a lithium battery module sampling unit includes a main board frame 1 set in a rectangular shape. A horizontally arranged wire harness groove 2 is provided at the central position of the upper surface of the main board frame 1, and a sampling wire harness is arranged in the wire harness groove 2. A plurality of electrode sheet holes are opened on both sides of the wire harness groove 2. The electrode sheet holes include a positive electrode hole 3, a negative electrode hole 4, and multiple groups of double holes 5. Each group of double holes 5 is composed of two single holes, and a first frame 6 is provided between the two single holes.

[0030] The positive electrode hole 3 and the negative electrode hole 4 are distributed at the left and right ends on one side of the wire harness groove 2, and the periphery of the positive electrode hole 3 or the negative electrode hole 4 is provided with a second frame 7; N groups of double holes 5 are evenly distributed between the positive electrode hole 3 and the negative electrode hole 4, and N + 1 groups of double holes 5 are evenly distributed on the other side of the wire harness groove 2; the positive electrode hole 3 is provided with a positive electrode sheet 8, the negative electrode hole 4 is provided with a negative electrode sheet 9, and the double holes 5 are provided with conductive electrode sheets 10; the positive electrode sheet 8, the negative electrode sheet 9, and the conductive electrode sheet 10 are respectively connected to the sampling wire harness.

[0031] In this embodiment, the sampling wire harness is composed of multiple wires, and a connecting piece is provided at the end of each wire. Sheet grooves matching the connecting pieces are respectively provided on the surfaces of the positive electrode sheet 8, the negative electrode sheet 9, and the conductive electrode sheet 10, and the connecting piece is welded to the sheet groove; a plurality of convex points are provided on the surface of the connecting piece.

[0032] The conductive electrode sheet 10 is provided in a rectangular shape. A longitudinally arranged groove is provided in the middle of the conductive electrode sheet 10. Two mounting holes are provided in the groove, and a pair of through holes are symmetrically provided on both sides of the groove; The first frame 6 is provided with two mounting posts that match the mounting holes of the conductive electrode sheet 10, and the conductive electrode sheet 10 is connected and fixed to the first frame 6 through the mounting posts.

[0033] On both sides of the second frame 7, two pairs of mounting posts are symmetrically provided. The positive electrode sheet 8 and the negative electrode sheet 9 are respectively provided with mounting holes that match the mounting posts, and the positive electrode sheet 8 and the negative electrode sheet 9 are respectively connected and fixed to the second frame through the mounting posts.

[0034] The positive electrode sheet 8 and the negative electrode sheet 9 are respectively provided with two connecting bolts; On both sides of the wire harness groove 2, multiple groups of buckles 11 for mounting and fixing the sampling wire harness are symmetrically provided; Multiple sensor wire holes 12 are evenly arranged in the middle of the wire harness groove 2.

[0035] The lower surface of the main board frame 1 in this embodiment is provided with a positioning groove that matches the lithium battery module detection device; N is equal to 3 or 4. In this embodiment, N is equal to 3, that is, on one side of the wire harness groove where the positive electrode holes 3 and the negative electrode holes 4 are located, 3 groups of double holes 5 are provided, and 4 groups of double holes 5 are evenly arranged on the other side of the wire harness groove.

[0036] Through the cooperation of the positioning groove provided on the back of the main board frame 1 and the lithium battery module detection device, the present utility model realizes the one-time detection of the welding quality of all electrode sheets, which is not only fast and accurate in detection, greatly improves the production efficiency, but also can effectively improve the product quality.

[0037] The above embodiments are only limited to illustrate the concept and technical features of the present utility model, and their purpose is to enable those skilled in the art to understand the technical solutions and implementation manners of the utility model, and cannot be used to limit the protection scope of the present utility model accordingly. Any equivalent substitution or equivalent change made according to the technical solutions of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A lithium battery module sampling unit, characterized in that: The sampling unit includes a main board frame set in a rectangular shape. At the center position of the upper surface of the main board frame, there is a horizontally arranged wire harness groove, and a sampling wire harness is arranged in the wire harness groove. On both sides of the wire harness groove, there are a plurality of pole piece holes. The pole piece holes include a positive pole hole, a negative pole hole, and multiple groups of double holes. Each group of double holes consists of two single holes, and there is a first frame between the two single holes. The positive pole hole and the negative pole hole are distributed at the ends on one side of the wire harness groove, and the periphery of the positive pole hole or the negative pole hole is set as a second frame. On one side of the wire harness groove where the positive pole hole and the negative pole hole are located, there are N groups of double holes, and N + 1 groups of double holes are evenly distributed on the other side of the wire harness groove. The positive pole hole is provided with a positive pole piece, the negative pole hole is provided with a negative pole piece, and the double holes are provided with conductive electrode pieces. The positive pole piece, the negative pole piece, and the conductive electrode piece are respectively connected to the sampling wire harness. The sampling wire harness is composed of multiple wires, and a connecting piece is provided at the end of each wire. On the surfaces of the positive pole piece, the negative pole piece, and the conductive electrode piece, there are respectively chip grooves matching the connecting pieces, and the connecting pieces are welded to the chip grooves. There are a plurality of bumps on the surface of the connecting piece. The conductive electrode piece is set in a rectangular shape. There is a longitudinally arranged groove in the middle of the conductive electrode piece. There are two mounting holes in the groove, and a pair of through holes are symmetrically arranged on both sides of the groove. The first frame is provided with two mounting posts matching the mounting holes of the conductive electrode piece, and the conductive electrode piece is connected and fixed to the first frame through the mounting posts. On both sides of the second frame, there are two pairs of symmetrically arranged mounting posts. The positive pole piece and the negative pole piece are respectively provided with mounting holes matching the mounting posts, and the positive pole piece and the negative pole piece are respectively connected and fixed to the second frame through the mounting posts. The positive pole piece and the negative pole piece are respectively provided with two connecting bolts. On both sides of the wire harness groove, there are multiple groups of buckles for mounting and fixing the sampling wire harness symmetrically. A plurality of sensor wire holes are evenly arranged in the middle of the wire harness groove. On the lower surface of the main board frame, there is a positioning groove matching the lithium battery module detection device. N is equal to 3 or 4; the positive pole hole and the negative pole hole are distributed at the left and right ends on one side of the wire harness groove.

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