Lithium battery module sampling unit detection device

Abstract

The invention relates to a lithium battery module sampling unit detection device, which comprises a detection main body, an adapter and a wire harness conduction tester, and is characterized in that the detection main body comprises a support and a base, and the support is arranged on the base; the support is provided with a plurality of conducting rods, the surface of the support is correspondingly provided with a plurality of through holes, and the lower end of each conducting rod is inserted into the corresponding through hole; the conductive rod is sleeved with a conductive ring which is connected with the conductive wire. The conductive wire is electrically connected with the adapter, and the adapter is electrically connected with the wire harness conduction tester and the power supply. The upper end of the conducting rod is provided with an annular convex body extending towards the outer side, the conducting rod is sleeved with a spring, and the spring is arranged between the annular convex body and the conducting ring. Compared with the prior art, the detection device has the advantages that the specially designed detection main body is combined with the adapter and the wire harness conduction tester, the welding quality of all the electrode plates of the lithium battery module sampling unit can be detected at a time, the detection is rapid and accurate, the production efficiency is greatly improved, and the product quality can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery modules, and in particular to a lithium battery module sampling unit detection device. Background Art

[0002] Lithium battery modules are key components of power battery packs, especially those of electric vehicles, which are very important for safety monitoring of electric vehicles. When the power battery pack encounters overcharge or over-discharge, the service life of each battery cell will be shortened. Sometimes, due to poor contact of the connecting wires or loose welding of the electrode sheets, the battery pack will overheat, and even thermal runaway will occur, endangering the safety of the car and passengers.

[0003] The lithium battery module monitors and manages the status of the power battery pack through the battery management system (BMS) and the sampling unit. The lithium battery module sampling unit generally includes a main board frame in the shape of a plate, and the surface of the main board frame is provided with sampling harnesses, electrode sheets, temperature sensors and other components, and the electrode sheets include positive and negative electrodes. During the manufacturing process, the connecting sheet of the sampling harness is usually laser welded to the electrode sheet. Since it is difficult to completely avoid the occurrence of cold welding and loose welding in mass production, it is necessary to test the welding quality of each electrode sheet of the lithium battery module sampling unit.

[0004] At present, the lithium battery module sampling unit manufacturing factory generally uses a wire harness continuity tester to test the welding quality of electrode sheets. During the inspection process, since the lithium battery module is equipped with multiple sets of electrode sheets, the operator needs to connect the wires, conduct power-on measurements, and remove the wires of all the electrode sheets of the lithium battery module sampling unit one by one. This inspection method is labor-intensive, time-consuming, and inefficient. Sometimes, individual electrode sheets may be missed, which poses a hidden danger to product quality and battery pack safety. Summary of the invention

[0005] The purpose of the present invention is to provide a lithium battery module sampling unit detection device. By combining the device with an adapter and a wiring harness continuity tester, the welding quality of all electrode sheets of the sampling unit can be detected at one time. The detection is fast and accurate, which not only greatly improves the production efficiency, but also effectively improves the product quality.

[0006] The object of the present invention is achieved by adopting the following technical solutions:

[0007] A lithium battery module sampling unit detection device comprises a detection body, an adapter and a wiring harness continuity tester, wherein the detection body comprises a bracket and a base, and the bracket is arranged on the base;

[0008] The bracket is provided with a plurality of conductive rods, and a plurality of through holes are correspondingly provided on the surface of the bracket, and the lower end of each conductive rod is inserted into the through hole;

[0009] The conductive rod sleeve is provided with a conductive ring, and the conductive ring is connected to the conductive wire;

[0010] The conductive wire is electrically connected to the adapter, and the adapter is electrically connected to the wiring harness continuity tester and the power supply.

[0011] As a preferred technical solution of the present invention, the upper end of the conductive rod is provided with an annular convex body extending outward, and the conductive rod sleeve is provided with a spring, which is arranged between the annular convex body and the conductive ring.

[0012] As a preferred technical solution of the present invention, the lower end of the conductive rod is connected to a slider, the slider is arranged in a slide groove, and the slide groove is arranged on the base.

[0013] As a preferred technical solution of the present invention, a simulated battery cell is provided in the slide slot.

[0014] As a preferred technical solution of the present invention, the bracket and the base are both configured as rectangular structures, and a plurality of flexible buffer blocks are provided on the upper surface of the bracket.

[0015] As a preferred technical solution of the present invention, the buffer blocks are distributed around the upper surface of the bracket, and the buffer blocks are made of rubber or foam plastic.

[0016] As a preferred technical solution of the present invention, a shell is provided between the bracket and the base, and the bracket and the base are connected and fixed by the shell.

[0017] As a preferred technical solution of the present invention, the conductive rods include rod No. 1, rod No. 2, rod No. 3, rod No. 4, rod No. 5, rod No. 6, rod No. 7, rod No. 8 and rod No. 9;

[0018] The adapter comprises a main board, the main board is provided with a sampling module, an input end and an output end, and the sampling module is electrically connected to the input end and the output end respectively;

[0019] The input ends are electrically connected to poles 1 to 9 respectively;

[0020] The output end is electrically connected to a wiring harness continuity tester.

[0021] As a preferred technical solution of the present invention, the adapter is provided with a housing, and the housing is provided with a power supply interface, an input interface and an output interface;

[0022] The power supply interface is electrically connected to the mainboard;

[0023] The input interface is electrically connected to the input terminal of the mainboard;

[0024] The output interface is electrically connected to the output terminal of the mainboard.

[0025] As a preferred technical solution of the present invention, the lithium battery module sampling unit is respectively provided with a plurality of positive electrode sheets and negative electrode sheets;

[0026] The No. 1 rod, No. 3 rod, No. 5 rod and No. 7 rod correspond to the negative electrode sheet of the sampling unit;

[0027] The No. 2 rod, No. 4 rod, No. 6 rod, No. 8 rod and No. 9 rod correspond to the positive electrode sheet of the sampling unit.

[0028] Beneficial effects of the present invention: Compared with the prior art, the present invention can perform a one-time detection of the welding quality of all electrode sheets of the lithium battery module sampling unit through a specially designed detection body combined with an adapter and a wiring harness conductivity tester. The detection is fast and accurate, which not only greatly improves the production efficiency, but also effectively improves the quality and reliability of the lithium battery module.

[0029] The multiple conductive rods provided in the present invention correspond one-to-one to all the electrode sheets of the lithium battery module sampling unit. During detection, all the electrode sheets of the sampling unit are aligned with the corresponding conductive rods and pressed tightly. Through a single detection by the harness conductivity tester, the detection of all the electrode sheets can be completed without missing the detection of individual electrode sheets, thereby realizing fast and efficient detection of the lithium battery module sampling unit, and further improving the safety of the power battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0031] Figure 2 yes Figure 1 Schematic diagram of the top view structure.

[0032] In the figure: 1, bracket, 2, base, 3, conductive rod, 4, annular convex body, 5, spring, 6, slider, 7, slide groove, 8, simulated battery cell, 9, buffer block, 10, shell, 11, rod No. 1, 12, rod No. 2, 13, rod No. 3, 14, rod No. 4, 15, rod No. 5, 16, rod No. 6, 17, rod No. 7, 18, rod No. 8, 19, rod No. 9. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0034] like Figure 1 and Figure 2 As shown, a lithium battery module sampling unit detection device includes a detection body, an adapter and a wiring harness continuity tester, the detection body includes a bracket 1 and a base 2, the bracket 1 is arranged on the base 2; the bracket 1 is provided with a plurality of conductive rods 3, and the surface of the bracket 1 is correspondingly provided with a plurality of through holes, and the lower end of each conductive rod 3 is inserted into the through hole; the conductive rod 3 is sleeved with a conductive ring, and the conductive ring is connected to the conductive wire; the conductive wire is electrically connected to the adapter, and the adapter is electrically connected to the wiring harness continuity tester and the power supply.

[0035] In this embodiment, the upper end of the conductive rod 3 is provided with an annular protrusion 4 extending outward, and the conductive rod 3 is sleeved with a spring 5, which is arranged between the annular protrusion 4 and the conductive ring. The lower end of the conductive rod 3 is connected to a slider 6, which is arranged in a slide groove 7, and the slide groove 7 is arranged on the base 2.

[0036] The slide groove 7 is provided with a simulated battery cell 8; the bracket 1 and the base 2 are both set as rectangular structures, and the upper surface of the bracket 1 is provided with a plurality of flexible buffer blocks 9, which are distributed around the upper surface of the bracket 1 and are made of rubber or foam plastic. In this embodiment, a shell 10 is further provided between the bracket 1 and the base 2, and the bracket 1 and the base 2 are connected and fixed by the shell 10.

[0037] In this embodiment, the conductive rods 3 include rods 1, 2, 3, 4, 5, 6, 7, 8 and 9. The adapter includes a main board, which is provided with a sampling module, an input end and an output end, wherein the sampling module is electrically connected to the input end and the output end respectively; the input end is electrically connected to rods 1 to 9 respectively; and the output end is electrically connected to a wiring harness continuity tester.

[0038] The adapter is provided with a shell, on which a power supply interface, an input interface and an output interface are provided; the power supply interface is electrically connected to the mainboard; the input interface is electrically connected to the input end of the mainboard; and the output interface is electrically connected to the output end of the mainboard.

[0039] The lithium battery module sampling unit is respectively provided with a plurality of positive electrode sheets and negative electrode sheets; the No. 1 rod, No. 3 rod, No. 5 rod and No. 7 rod correspond to the negative electrode sheets of the lithium battery module sampling unit, and the No. 2 rod, No. 4 rod, No. 6 rod, No. 8 rod and No. 9 rod correspond to the positive electrode sheets of the lithium battery module sampling unit.

[0040] When the present invention is used to detect the lithium battery module sampling unit, it is only necessary to align all the electrode sheets of the lithium battery module sampling unit with the corresponding conductive rods and press them tightly, and the conductivity of the electrode sheets can be detected by the wire harness conductivity tester. The test results are displayed on the screen of the wire harness conductivity tester. By installing relevant software, faults such as poor contact or failure to conduct can also be highlighted, which is convenient and intuitive, and can achieve rapid and efficient detection of the welding quality of the electrode sheets of the lithium battery module sampling unit, thereby greatly improving production efficiency and product quality.

[0041] The above embodiments are limited to illustrating the concept and technical features of the present invention, and their purpose is to enable those skilled in the art to understand the technical solutions and implementation methods of the present invention, and they cannot limit the protection scope of the present invention. Any equivalent replacement or equivalent change made according to the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery module sampling unit detection device, comprising a detection body, an adapter and a wiring harness continuity tester, characterized in that: The detection body comprises a bracket and a base, and the bracket is arranged on the base; The bracket is provided with a plurality of conductive rods, and a plurality of through holes are correspondingly provided on the surface of the bracket, and the lower end of each conductive rod is inserted into the through hole; The conductive rod sleeve is provided with a conductive ring, and the conductive ring is connected to the conductive wire; The conductive wire is electrically connected to the adapter, and the adapter is electrically connected to the wiring harness continuity tester and the power supply.

2. The lithium battery module sampling unit detection device according to claim 1, characterized in that: The upper end of the conductive rod is provided with an annular convex body extending outward, and the conductive rod sleeve is provided with a spring, which is arranged between the annular convex body and the conductive ring.

3. The lithium battery module sampling unit detection device according to claim 2, characterized in that: The lower end of the conductive rod is connected to a sliding block, the sliding block is arranged in a sliding groove, and the sliding groove is arranged on the base.

4. The lithium battery module sampling unit detection device according to claim 3, characterized in that: A simulated battery cell is arranged in the slide slot.

5. The lithium battery module sampling unit detection device according to any one of claims 1 to 4, characterized in that: The bracket and the base are both configured as rectangular structures, and a plurality of flexible buffer blocks are provided on the upper surface of the bracket.

6. The lithium battery module sampling unit detection device according to claim 5, characterized in that: The buffer blocks are distributed around the upper surface of the bracket and are made of rubber or foam plastic.

7. The lithium battery module sampling unit detection device according to claim 1, characterized in that: A shell is arranged between the bracket and the base, and the bracket and the base are connected and fixed by the shell.

8. The lithium battery module sampling unit detection device according to claim 1, characterized in that: The conductive rods include rod No. 1, rod No. 2, rod No. 3, rod No. 4, rod No. 5, rod No. 6, rod No. 7, rod No. 8 and rod No. 9; The adapter comprises a main board, the main board is provided with a sampling module, an input end and an output end, and the sampling module is electrically connected to the input end and the output end respectively; The input ends are electrically connected to poles 1 to 9 respectively; The output end is electrically connected to a wiring harness continuity tester.

9. The lithium battery module sampling unit detection device according to claim 8, characterized in that: The adapter is provided with a shell, and the shell is provided with a power supply interface, an input interface and an output interface; The power supply interface is electrically connected to the mainboard; The input interface is electrically connected to the input terminal of the mainboard; The output interface is electrically connected to the output terminal of the mainboard.

10. The lithium battery module sampling unit detection device according to claim 8, characterized in that: The lithium battery module sampling unit is respectively provided with a plurality of positive electrode sheets and negative electrode sheets; The No. 1 rod, No. 3 rod, No. 5 rod and No. 7 rod correspond to the negative electrode sheet of the sampling unit; The No. 2 rod, No. 4 rod, No. 6 rod, No. 8 rod and No. 9 rod correspond to the positive electrode sheet of the sampling unit.

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