Lithium battery test probe

Abstract

The application discloses a lithium battery test probe, which comprises a probe assembly and a wiring assembly, the probe assembly is integrally formed and fixed at the tail of the wiring assembly, the probe assembly comprises a first probe group and a second probe group, the wiring assembly comprises a first wiring sheet and a second wiring sheet, the second wiring sheet is arranged at the middle part of the first probe group, and the test probes in the first probe group and the second probe group are arranged at intervals. The first wiring sheet and the second wiring sheet are integrally formed with the first probe group and the second probe group in the mode of injection molding, so that the connection between the first wiring sheet and the second wiring sheet is stable and reliable, and short circuit caused by the mutual contact between the heads of the test probes due to fracture does not occur.

Description

TECHNICAL FIELD

[0001] The application relates to a detection device, in particular to a lithium battery test probe. BACKGROUND

[0002] OCV is Open circuit voltage = open circuit voltage, which refers to the potential difference between the two poles when the battery is not discharged in open circuit. Unlike the positive and negative poles of the traditional lithium battery arranged on the two sides of the battery, the positive and negative poles of some existing lithium batteries are arranged on one side of the battery. When testing such lithium batteries, many existing test devices use a large probe to perform overall coverage testing. However, due to the processing problems of the probe itself or the installation problems of the test device, the large probe may not fully cover the electrodes of the lithium battery, thereby affecting the accuracy of the test.

[0003] The applicant previously applied for an invention patent with application number 2022221266128, which disclosed a lithium battery OCV testing device. The device uses a plurality of electrode probes arranged in a hexagonal shape to replace the traditional large probe to overcome the problem of incomplete coverage of the electrodes of the lithium battery. However, the above-mentioned scheme still has the following defects in practice: 1. The small probe is very small in size, and during testing, the small probe may still bend, causing the head to contact each other and resulting in a short circuit; 2. The number of small probes is large, making it inconvenient during production, processing, and assembly. SUMMARY

[0004] To solve the above-mentioned purpose, the application provides a lithium battery test probe, which comprises a probe assembly and a wiring assembly. The probe assembly is integrally formed and fixed to the tail of the wiring assembly. The probe assembly comprises a first probe group and a second probe group. The wiring assembly comprises a first wiring sheet and a second wiring sheet. The second wiring sheet is arranged in the middle of the first probe group. The test probes in the first probe group and the second probe group are arranged at intervals.

[0005] Further, a plurality of through holes are arranged on the second wiring sheet. The through holes are arranged between each test probe in the second probe group. The number of test probes in the first probe group is the same as the number of through holes, and the positions are opposite.

[0006] Further, the first wiring sheet and the second wiring sheet extend outwardly to have a first wiring portion and a second wiring portion.

[0007] Further, the first wiring portion and the second wiring portion are arranged in a staggered manner.

[0008] Further, the first wiring portion and the second wiring portion are provided with wiring holes.

[0009] Further, the number of the first and second wiring parts is 2.

[0010] Further, a mounting seat and a fixing cap are arranged outside the wiring assembly, the fixing seat comprises a fixing part and a threaded part, and the fixing cap is internally provided with an internal thread matched with the threaded part.

[0011] Further, the first and second wiring pieces are fixed in the fixing part, the first and second wiring parts extend out of the fixing part, and the threaded part partially covers the probe assembly.

[0012] Further, the test probes in the first and second probe groups are externally provided with an insulating layer.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] Compared with the conventional single large probe, the two different test probes can be maximally kept in contact with the positive and negative poles of the lithium battery, thereby ensuring the accuracy of the test, and since the first and second wiring pieces and the first and second probe groups are integrally formed by injection molding, the connection between them is stable and reliable, and short circuit caused by the mutual contact between the heads of the test probes due to the fracture of the first and second wiring pieces can be avoided, and since the first probe group passes through the through hole of the second wiring piece, the second wiring piece is located between the first probe groups, thereby supporting the first probe groups to a certain extent and preventing the first probe groups from being bent to cause the mutual contact between the heads of the test probes.

[0015] Additional aspects and advantages of the application will be better understood from the following description with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the lithium battery test probe of the present application;

[0018] Figure 2 Fig. 1 is a schematic diagram of the overall structure of the lithium battery test probe of the present application;

[0019] Figure 3A structure diagram of a first probe group of a lithium battery test probe of the present application;

[0020] Figure 4 A structure diagram of a second probe group of a lithium battery test probe of the present application;

[0021] The reference signs and names in the drawings are as follows:

[0022] Probe assembly 100, wiring assembly 200, tail 131, first probe group 110, second probe group 120, test probe 130, insulating layer 132, first wiring tab 210, second wiring tab 220, through hole 221, first wiring part 230, second wiring part 240, wiring hole 250, head 133, mounting seat 300, fixing cap 400, fixing part 310, threaded part 320. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0024] The present application provides a lithium battery test probe, which combines Figures 2-4 As shown, it comprises a probe assembly 100 and a wiring assembly 200, the probe assembly 100 is integrally formed and fixed on the tail 131 of the wiring assembly 200, here the integrally formed means that the probe assembly 100 is welded on the wiring assembly 200 first, and then fixed and formed by an injection molding machine. The probe assembly 100 comprises a first probe group 110 and a second probe group 120, the first probe group 110 and the second probe group 120 each contain a plurality of test probes 130, and an insulating layer 132 is arranged outside between the head 133 and the tail 131 of the test probe 130.

[0025] The wiring assembly 200 comprises a first wiring piece 210 and a second wiring piece 220, the tail 131 of the first probe group 110 is fixedly connected with the first wiring piece 210, the tail 131 of the second probe group 120 is fixedly connected with the second wiring piece 220, a plurality of through holes 221 are arranged on the second wiring piece 220, the through holes 221 are arranged between the test probes 130 in the second probe group 120, the number of the inner test probes 130 of the first probe group 110 is same as the number of the through holes 221, and the positions are opposite, when the second wiring piece 220 moves towards the first wiring piece 210, the first probe group 110 can pass through the through holes 221 and extend into the test probes 130 of the second probe group 120, so that the test probes 130 in the first probe group 110 and the second probe group 120 are arranged at intervals.

[0026] The first wiring piece 210 and the second wiring piece 220 extend outwardly with a first wiring part 230 and a second wiring part 240, the first wiring part 230 and the second wiring part 240 are arranged staggered, that is, the first wiring part 230 does not shield the second wiring part 240,

[0027] The number of the first wiring part 230 and the second wiring part 240 is both 2, wiring holes 250 are arranged on the first wiring part 230 and the second wiring part 240 for connecting with the test equipment through connecting wires.

[0028] In use, first, the first wiring piece 210 and the second wiring piece 220 are fixed between the first probe group 110 and the second probe group 120, then the second wiring piece 220 is moved towards the first wiring piece 210, the first probe group 110 can pass through the through holes 221 and extend into the test probes 130 of the second probe group 120, finally, the head 133 of the first probe group 110 and the second probe group 120 is kept on a plane.

[0029] In the test, the probe assembly 100 composed of the first probe group 110 and the second probe group 120 is in contact with the positive and negative electrodes of the lithium battery to be tested at the same time. Since each probe group is composed of a plurality of test probes 130, and the test probes 130 between the first probe group 110 and the second probe group 120 are arranged at intervals, when the test probes 130 of the first probe group 110 and the second probe group 120 contact the positive and negative electrodes of the lithium battery at the same time, the tested current is transmitted to the first wiring part 230 and the second wiring part 240 on the first wiring piece 210 and the second wiring piece 220, and finally transmitted to the test equipment through the wire connected with the wiring hole 250 to complete the test. Compared with the traditional large probe, the two different test probes 130 can be maximally kept in contact with the positive and negative electrodes of the lithium battery at the same time, ensuring the accuracy of the test. At the same time, since the first wiring piece 210 and the second wiring piece 220 are integrally formed with the first probe group 110 and the second probe group 120 by injection molding, the connection between them is stable and reliable, and short circuit between the head parts 133 of the test probes 130 due to fracture will not occur. Again, since the first probe group 110 passes through the through hole 221 of the second wiring piece 220, the second wiring piece 220 is located between the first probe group 110, which also supports the first probe group 110 to a certain extent, preventing the first probe group 110 from bending and causing the head parts 133 of the test probes 130 to contact each other and cause short circuit.

[0030] In combination Figures 1-2 As shown in the wiring assembly 200, the mounting seat 300 and the fixing cap 400 are sleeved outside the wiring assembly 200. The fixing seat includes a fixing part 310 and a threaded part 320, and the fixing cap 400 is internally provided with an internal thread matched with the threaded part 320. The first wiring piece 210 and the second wiring piece 220 are fixed in the fixing part 310, and the first wiring part 230 and the second wiring part 240 extend out of the fixing part 310. The threaded part 320 partially covers the probe assembly 100. During installation, the wiring assembly 200 is first fixed in the mounting seat 300, then the probe assembly 100 is inserted into the threaded part 320, only the head part 133 is exposed, then one end of the threaded part 320 is inserted into the test rack, and finally the fixing cap 400 is screwed from the other end, so that the entire device is fixed on the test rack. Compared with the installation method of the prior art, it is more convenient and practical.

[0031] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A lithium battery test probe, characterized in that, The device includes a probe assembly (100) and a wiring assembly (200). The probe assembly (100) is integrally formed and fixed to the tail (131) of the wiring assembly (200). The probe assembly (100) is first welded to the wiring assembly (200), and then fixed by injection molding. The probe assembly (100) includes a first probe group (110) and a second probe group (120). The wiring assembly (200) includes a first wiring piece (210) and a second wiring piece (220). The second wiring piece (220) is disposed in the middle of the first probe group (110). The test probes (130) in the first probe group (110) and the second probe group (120) are spaced apart. The second connector (220) is provided with a plurality of through holes (221), which are arranged between each test probe (130) in the second probe group (120). The number of test probes (130) in the first probe group (110) is the same as the number of through holes (221) and they are positioned opposite each other. The first connector (210) and the second connector (220) have a first connector portion (230) and a second connector portion (240) extending outward. The tail (131) of the first probe group (110) is fixedly connected to the first connector (210), and the tail (131) of the second probe group (120) is fixedly connected to the second connector (220).

2. The lithium battery test probe according to claim 1, characterized in that, The first wiring section (230) and the second wiring section (240) are staggered.

3. The lithium battery test probe according to claim 2, characterized in that, The first wiring portion (230) and the second wiring portion (240) are provided with wiring holes (250).

4. The lithium battery test probe according to any one of claims 1-3, characterized in that, There are two of each of the first wiring section (230) and the second wiring section (240).

5. The lithium battery test probe according to any one of claims 4, characterized in that, A mounting base (300) and a fixing cap (400) are provided on the outer sleeve of the wiring assembly (200). The mounting base (300) includes a fixing part (310) and a threaded part (320). The fixing cap (400) is provided with an internal thread that mates with the threaded part (320).

6. The lithium battery test probe according to any one of claims 5, characterized in that, The first connector (210) and the second connector (220) are fixed inside the fixing part (310), the first connector (230) and the second connector (240) extend outside the fixing part (310), and the probe assembly (100) is covered by the threaded part (320).

7. The lithium battery test probe according to any one of claims 6, characterized in that, An insulating layer (132) is provided on the outside of the test probes (130) in the first probe group (110) and the second probe group (120).

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