CN203204021U - Clamp for testing internal resistance and voltage in battery pack - Google Patents

Abstract

The utility model relates to a battery detection device and discloses a clamp for testing the internal resistance and the voltage in a battery pack. The clamp comprises an insulation base plate, wherein two lower current-conducting plates are disposed on the upper surface of the base plate at a certain interval; a driving device is suspended above the base plate; the driving device is in driving connection with an insulation top plate and is used for driving the driving insulation top plate to move up and down in a manner of parallel to the base plate; at least one through hole is disposed at each projection position of each lower current-conducting plate on the insulation top plate; a guide rod is axially movably disposed in the through hole; a reset spring is sleeved on the guide rod; an upper current-conducting plate is fixedly disposed at the lower end of the guide rod and is parallel to the lower current-conducting plate; each lower current-conducting plate and each upper current-conducting plate which is vertically opposite to each other are respectively communicated with the same work lead. The clamp for testing the internal resistance and the voltage in the battery pack effectively solves the problem of low set-matching quality caused by unstable internal resistance/voltage tests during a set-matching process.

Description

A fixture for testing internal resistance and voltage in a battery pack

technical field

The utility model relates to battery testing equipment, in particular to a fixture for testing internal resistance and voltage in a battery PACK.

Background technique

The battery PACK process is divided into three parts: pre-processing, assembly, and packaging. In the PACK process, the internal resistance, voltage, capacity and size of the battery cells must be tested. The traditional method is to use conventional clamps. Both the upper and lower splints are designed with copper plates. The lower splint is fixed on the insulating workbench, and the upper splint is fixed on the piston rod of the cylinder through the insulating plate. Or loosen the tabs of the cell to be tested. When this kind of fixture tests the internal resistance/voltage, due to the inconsistent thickness of the tab or the flatness of the tab, it is easy to cause one tab to be compressed while the other is loose, resulting in the measured internal resistance voltage. problem; and after a period of use, due to the severe wear of the copper plate, the phenomenon of internal resistance/voltage fluctuations due to poor contact is more serious, which seriously affects the accuracy of the matching group, and the quality of the battery cell combination cannot be guaranteed.

Utility model content

In order to overcome the above-mentioned shortcomings, the utility model provides a fixture capable of accurately measuring the internal resistance and voltage of the battery cell in the battery PACK.

The purpose of this utility model is achieved through the following technical measures, a fixture for testing internal resistance and voltage in a battery PACK, including an insulating bottom plate, two lower conductive plates are arranged on the upper surface of the bottom plate at intervals, and a A driving device, the driving device drives and connects an insulating top plate, and is used to drive the insulating top plate to move up and down parallel to the bottom plate, and the lower conductive plate is at least provided with a through hole at each projection of the insulating top plate, and the axial movement of the through hole is arranged There is a guide rod, and a return spring is set on the guide rod, and the lower end of the guide rod is fixedly arranged with an upper conductive plate parallel to the lower conductive plate; connected.

As a preferred manner, the lower conductive plate is provided with two through holes at each projection of the insulating top plate.

Specifically, the lower conductive plate and the upper conductive plate are copper plates.

Specifically, the driving device is an air cylinder, and the insulating top plate is fixed on the piston rod.

Specifically, the guide rod is a copper rod with a diameter of 4mm.

The utility model uses a guide rod with a return spring and an upper conductive plate as the upper splint, so that regardless of whether the thickness of the tab of the battery cell changes, the strength and contact area of each contact are basically unchanged, and the test results are relatively stable; use During the process, even if the conductive plate is worn, it will not affect the test effect, thus effectively solving the problem of low quality of the assembly caused by the unstable internal resistance/voltage test during the assembly process.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

FIG. 2 is a partial enlarged view of A in FIG. 1 .

Detailed ways

Below in conjunction with embodiment and with reference to accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a fixture for testing internal resistance and voltage in a battery PACK includes an insulating base plate 5, two lower conductive copper plates 4 are arranged at intervals on the upper surface of the base plate 5, a cylinder 1 is suspended above the base plate, and the piston rod of the cylinder 1 is fixed on it. There is an insulating top plate 2, and the cylinder 1 works to drive the insulating top plate 2, and the parallel bottom plate 5 moves up and down. Referring to Fig. 2, two through-holes 201 are arranged at 4 positions of the conductive copper plate under the projection of the insulating top plate 2, and a copper rod 302 with a diameter of 4 mm is arranged axially in the through-hole 201. The clamping plate 101 of the through hole 201, the copper rod 302 is located at the lower end of the insulating top plate 2, and an upper conductive copper plate 304 is arranged in parallel. The compression sleeve above the copper rod 302 is provided with a return spring 303, and the upper and lower corresponding lower conductive copper plates 4 and upper conductive copper plates 304 are respectively connected by the same working wire.

The utility model adopts a copper rod (diameter 4mm) with a spring function as the upper splint, regardless of whether the thickness of the tab of the cell changes, the force and contact area of each contact are basically unchanged, and the test results are relatively stable; during use Even if the upper and lower conductive copper plates are worn out, the test results will not be affected, which solves the problem of low quality of matching caused by unstable internal resistance/voltage testing during the matching process.

The above is the elaboration of the fixture for testing the internal resistance and voltage in the battery PACK of the utility model, which is used to help understand the utility model, but the implementation of the utility model is not limited by the above examples, and any of them does not deviate from the principle of the utility model The changes, modifications, substitutions, combinations, and simplifications made below should all be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (5)

1. test internal resistance among a battery PACK, the anchor clamps of voltage, it is characterized in that: comprise insulating base, described plate upper surface is arranged at intervals with two lower conducting plates, a drive unit has suspended above the described base plate, described drive unit drives and connects an insulation top board, being used for driving the parallel base plate of insulation top board moves up and down, each projection place that described lower conducting plate is positioned at the insulation top board is provided with a through hole at least, axially be movably set with a guide rod in the described through hole, be arranged with a back-moving spring on the described guide rod, the parallel lower conducting plate in the lower end of described guide rod is set with current-carrying plate on; The lower conducting plate of described correspondence up and down is communicated with by identical work lead respectively with last current-carrying plate.

2. test the anchor clamps of internal resistance, voltage among the battery PACK according to claim 1, it is characterized in that: each projection place that described lower conducting plate is positioned at the insulation top board is provided with two through holes.

3. test the anchor clamps of internal resistance, voltage among the battery PACK according to claim 1 and 2, it is characterized in that: described lower conducting plate and last current-carrying plate are copper coin.

4. test the anchor clamps of internal resistance, voltage among the battery PACK according to claim 1 and 2, it is characterized in that: described drive unit is cylinder, and described insulation top board is fixed on the piston rod.

5. test the anchor clamps of internal resistance, voltage among the battery PACK according to claim 1 and 2, it is characterized in that: described guide rod is the copper rod of diameter 4mm.

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