Detection tool for insulating coating on surface of battery box

Abstract

The utility model discloses a detection tool for an insulating coating on the surface of a battery box, the battery box is provided with a first surface and a second surface which are opposite to each other, and the first surface is provided with the insulating coating; the detection tool comprises a negative electrode electrically connected with the second surface, conductive foam connected with the insulating coating, a positive electrode electrically connected with the conductive foam, and a conductive metal layer arranged between the insulating coating and the conductive foam. According to the utility model, the conductive metal layer is additionally arranged between the insulating coating and the conductive foam, and the conductive foam is not in direct contact with the insulating coating, so that when the insulating coating loses efficacy, the conductive foam is not easy to generate high temperature to be burnt through, and the conductive foam is further protected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery box detection, in particular to a detection tool for an insulating coating on the surface of a battery box. Background Art

[0002] The battery box is a shell for installing battery modules, and its surface is provided with an insulating coating to prevent leakage. Before the battery box leaves the factory, the leakage prevention performance of the insulating coating needs to be tested.

[0003] In order to detect all positions of the insulating coating, the existing inspection tooling usually sets a conductive foam on one side of the insulating coating and makes the conductive foam fit the insulating coating completely; then connect the conductive foam to the positive pole of the power supply, and then connect the other side of the battery box to the negative pole of the power supply; finally, turn on the power supply and detect whether the circuit is connected. If it is connected, it indicates that the insulating coating has failed, and if it is not connected, it indicates that the insulating coating is good. Among them, when there is an insulating coating failure, the high voltage generated between the conductive foam and the insulating coating at the moment the circuit is connected will burn through the conductive foam, thereby causing damage to the conductive foam. That is, once an unqualified insulating coating is encountered during the inspection process, the conductive foam will be burned, resulting in high inspection costs and low inspection efficiency. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a detection tool for the insulating coating on the surface of a battery box, which is used to solve the problem that the conductive foam is easily burned through when detecting the insulating coating in the prior art.

[0005] The utility model adopts a technical solution to solve its technical problem, which is a detection tool for the insulating coating on the surface of a battery box. The battery box has a first surface and a second surface which are opposite to each other, and the first surface has an insulating coating; the detection tool includes: a negative electrode electrically connected to the second surface, a conductive foam connected to the insulating coating, and a positive electrode electrically connected to the conductive foam, and the detection tool also includes a conductive metal layer arranged between the insulating coating and the conductive foam.

[0006] Furthermore, a side of the conductive metal layer away from the conductive foam is in contact with a surface of the insulating coating.

[0007] Furthermore, the conductive metal layer is copper foil.

[0008] Furthermore, a conductive cloth is provided between the conductive metal layer and the insulating coating layer, and the conductive cloth is bonded to the insulating coating layer.

[0009] Furthermore, the detection tooling also includes:

[0010] A lower support and an upper support, wherein the battery box is arranged between the lower support and the upper support; the lower support is provided with an abutment wall, and one end of the battery box can abut against the abutment wall;

[0011] A conductive pin is electrically connected to the negative electrode, and the conductive pin is movably arranged at an end of the battery box away from the abutment wall and can abut against the second surface.

[0012] Furthermore, an abutment plate extends downward from the second surface of the battery box;

[0013] The conductive pin can slide relative to the battery box so that the conductive pin is connected to or separated from the abutting plate.

[0014] Furthermore, the detection tooling also includes:

[0015] A fixing seat is arranged at one end of the battery box away from the abutment wall; the conductive pin is slidably arranged on the fixing seat, and a pre-tightening spring is arranged between the conductive pin and the fixing seat, and the pre-tightening spring is used to provide a pre-tightening force to make the conductive pin move in a direction toward the abutment plate.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] A conductive metal layer is added between the insulating coating and the conductive foam, and the conductive foam does not directly contact the insulating coating. When the insulating coating fails, the conductive foam is not easily burned by high temperature, thereby protecting the conductive foam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A cross-sectional view of a detection tool in an embodiment;

[0019] Figure 2 is a cross-sectional view of the conductive foam, the conductive metal layer and the conductive cloth in the embodiment;

[0020] In the figure:

[0021] 100, battery box; 110, abutment plate; 120, abutment wall;

[0022] 200, conductive foam;

[0023] 300, lower support;

[0024] 400, upper support;

[0025] 500, fixing seat; 510, conductive pin;

[0026] 600, conductive metal layer;

[0027] 700. Conductive fabric. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Please refer to Figure 1-Figure 2 The utility model discloses a detection tool for an insulating coating on the surface of a battery box. The battery box 100 has a first surface and a second surface which are opposite to each other, and the first surface has an insulating coating; the detection tool comprises: a negative electrode electrically connected to the second surface, a conductive foam 200 connected to the insulating coating, and a positive electrode electrically connected to the conductive foam 200, and the detection tool also comprises a conductive metal layer 600 arranged between the insulating coating and the conductive foam 200.

[0030] Specifically, the present application adds a conductive metal layer 600 between the insulating coating and the conductive foam 200. The conductive foam 200 is not in direct contact with the insulating coating. When the insulating coating fails, the conductive foam 200 is not easily burned by high temperature, thereby protecting the conductive foam 200.

[0031] It should be noted that if the conductive foam 200 is directly in contact with the insulating coating, and the failure point area of ​​the insulating coating is very small, the contact position of the failure point with the conductive foam 200 is small, resulting in a large resistance value and a high temperature burning through the conductive foam 200. In the present application, the conductive metal layer 600 is in contact with the conductive foam 200, and the contact area between the conductive foam 200 and the conductive metal layer 600 is large, and the resistance at the contact position is small, so the conductive foam 200 will not be burned through by high temperature. At the same time, the melting point of the conductive metal layer 600 is high, and even if a high temperature is generated at the contact position between the conductive metal layer 600 and the insulating coating, the conductive metal layer 600 will not be burned through. In this way, the conductive foam 200 is protected from being burned through by high temperature while ensuring that the detection work can be carried out smoothly.

[0032] Furthermore, a surface of the conductive metal layer 600 away from the conductive foam 200 is in contact with the surface of the insulating coating.

[0033] Specifically, the conductive metal layer 600 is in contact with the surface of the insulating coating, making it easy to detect all positions on the insulating coating.

[0034] Furthermore, the conductive metal layer 600 is copper foil.

[0035] Furthermore, a conductive cloth 700 is provided between the conductive metal layer 600 and the insulating coating layer, and the conductive cloth 700 is bonded to the insulating coating layer.

[0036] The conductive cloth 700 is arranged so as to fit the conductive cloth 700 and the insulating coating. The conductive cloth 700 is a flexible material and is convenient for completely fitting with the insulating coating so as to detect all positions of the insulating coating.

[0037] Furthermore, the detection tooling also includes:

[0038] A lower support 300 and an upper support 400, wherein the battery box 100 is disposed between the lower support 300 and the upper support 400; the lower support 300 is provided with an abutting wall 120, and one end of the battery box 100 can abut against the abutting wall 120;

[0039] A conductive pin 510 is electrically connected to the negative electrode. The conductive pin 510 is movably disposed at one end of the battery box 100 away from the abutting wall 120 and can abut against the second surface.

[0040] Furthermore, an abutment plate 110 extends downward from the second surface of the battery box 100;

[0041] The conductive pin 510 can slide relative to the battery box 100 so that the conductive pin 510 is connected to or separated from the contact plate 110 .

[0042] Furthermore, the detection tooling also includes:

[0043] A fixing seat 500 is arranged at one end of the battery box 100 away from the abutment wall 120; the conductive pin 510 is slidably arranged on the fixing seat 500, and a pre-tightening spring is arranged between the conductive pin 510 and the fixing seat 500, and the pre-tightening spring is used to provide a pre-tightening force to make the conductive pin 510 move in the direction toward the abutment plate 110.

[0044] Specifically, the conductive pin 510 is set to be movable, so that it can allow for the dimensional tolerance of the battery box 100, and can be moved to a position where it is always in contact with the abutment plate 110 to achieve electrical connection. Among them, a preload spring is provided so that the conductive pin 510 always has a force to move toward the abutment plate 110, ensuring the stability of the connection when in contact and preventing disconnection.

[0045] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A detection tool for an insulating coating on the surface of a battery box, wherein the battery box has a first surface and a second surface opposite to each other, and the first surface has an insulating coating; the detection tool comprises: A negative electrode electrically connected to the second surface, a conductive foam connected to the insulating coating, and a positive electrode electrically connected to the conductive foam, characterized in that the detection tooling also includes a conductive metal layer arranged between the insulating coating and the conductive foam.

2. A battery box surface insulation coating detection tool according to claim 1, characterized in that: A side of the conductive metal layer away from the conductive foam is in contact with the surface of the insulating coating.

3. The detection tool for the insulating coating on the surface of a battery box according to claim 1, characterized in that: The conductive metal layer is copper foil.

4. The detection tool for the insulating coating on the surface of a battery box according to claim 1, characterized in that: A conductive cloth is also provided between the conductive metal layer and the insulating coating layer, and the conductive cloth is bonded to the insulating coating layer.

5. The detection tool for the insulating coating on the surface of a battery box according to claim 1, characterized in that: The detection tooling also includes: A lower support and an upper support, wherein the battery box is arranged between the lower support and the upper support; the lower support is provided with an abutment wall, and one end of the battery box can abut against the abutment wall; A conductive pin is electrically connected to the negative electrode, and the conductive pin is movably arranged at an end of the battery box away from the abutment wall and can abut against the second surface.

6. The detection tool for the insulating coating on the surface of a battery box according to claim 5, characterized in that: An abutment plate extends downward from the second surface of the battery box; The conductive pin can slide relative to the battery box so that the conductive pin is connected to or separated from the abutting plate.

7. A battery box surface insulation coating detection tool as claimed in claim 6, characterized in that: The detection tooling also includes: A fixing seat is arranged at one end of the battery box away from the abutment wall; the conductive pin is slidably arranged on the fixing seat, and a pre-tightening spring is arranged between the conductive pin and the fixing seat, and the pre-tightening spring is used to provide a pre-tightening force to make the conductive pin move in a direction toward the abutment plate.

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