CN-224203390-U - Resistance test system

CN224203390UCN 224203390 UCN224203390 UCN 224203390UCN-224203390-U

Abstract

The utility model discloses a resistance test system which comprises a light source, an imaging device, a grating, a control module and a light source, wherein the light source is used for emitting light to a battery piece to be tested, the imaging device and the grating are positioned between the imaging device and the battery piece to be tested, the grating is used for shielding part of light emitted by the light source, the grating comprises at least two gratings, the patterns of the at least two gratings are complementary patterns, the imaging device is used for respectively acquiring at least two first gray value images of the battery piece to be tested under the condition that the at least two gratings shield part of light emitted by the light source, the imaging device is also used for acquiring a second gray value image of the battery piece to be tested under the condition that the light emitted by the light source is not shielded, and the control module is electrically connected with the imaging device and the light source, and the light source is positioned at one side of the imaging device. The utility model can realize the non-contact measurement of the resistance of any metallized pattern battery piece, has good universality and compatibility, and improves the accuracy of the test result.

Inventors

WU HONGBO
CHEN JUN
WANG YONGQIAN
CHEN GANG

Assignees

浙江爱旭太阳能科技有限公司
山东爱旭太阳能科技有限公司
珠海富山爱旭太阳能科技有限公司
天津爱旭太阳能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20250530

Claims (10)

1. A resistance testing system, comprising: The light source is used for emitting light rays to the battery piece to be tested; The device comprises an imaging device, a grating, an imaging device and a light source, wherein the grating is positioned between the imaging device and the battery piece to be tested, the grating is used for shielding part of light rays emitted by the light source, the grating comprises at least two gratings, the patterns of the at least two gratings are complementary patterns, the imaging device is used for respectively acquiring at least two first gray value images of the battery piece to be tested under the condition that the at least two gratings shield part of light rays emitted by the light source, and the imaging device is also used for acquiring a second gray value image of the battery piece to be tested under the condition that the light rays emitted by the light source are not shielded; And the control module is electrically connected with the imaging device and the light source, and the light source is positioned on one side of the imaging device.
2. The resistance testing system of claim 1, wherein the at least two first gray value images are complementary; The resistance test system also comprises a driving device; the driving device is electrically connected with the control module under the condition that the position of the light source and the position of the battery piece to be tested are fixed, the driving device is connected with the at least two gratings and is used for driving the at least two gratings to move, or is connected with the battery piece to be tested under the condition that the position of the light source and the position of the gratings are fixed, and is used for driving the battery piece to be tested to move.
3. The resistance testing system of claim 2, wherein the driving means comprises a grating driving means and a battery cell driving means; the grating driving device comprises a servo motor or a stepping motor; The battery piece driving device comprises a conveyor belt.
4. The resistance testing system of claim 2, wherein the imaging device comprises a first imaging device, a second imaging device, and a third imaging device, wherein the light source comprises a first light source, a second light source, and a third light source, wherein the grating comprises a first grating and a second grating, and wherein the pattern of the first grating and the pattern of the second grating are complementary patterns; The control module is electrically connected with the first imaging device, the second imaging device, the third imaging device, the first light source, the second light source and the third light source, the first light source is positioned at one side of the first imaging device, the first imaging device is opposite to the first grating, the second light source is positioned at one side of the second imaging device, the second imaging device is opposite to the second grating, the third light source is positioned at one side of the third imaging device, and the opposite positions of the third imaging device are free from shielding by the first grating and the second grating; the driving device is used for driving the battery piece to be tested to move to one side of the first grating far away from the first imaging device, and the first imaging device is used for acquiring a first gray value first image of the battery piece to be tested under the condition that the first grating shields part of light rays emitted by the first light source; The driving device is used for driving the battery piece to be tested to move to one side of the second grating far away from the second imaging device, and the second imaging device is used for acquiring a first gray value second image of the battery piece to be tested under the condition that the second grating shields part of light rays emitted by the second light source; The driving device is used for driving the battery piece to be tested to move to the opposite side of the third imaging device, and the third imaging device is used for acquiring a second gray value image of the battery piece to be tested under the condition that light rays emitted by the third light source are not blocked.
5. The resistance testing system of claim 2, wherein the grating comprises a first grating and a second grating, the pattern of the first grating and the pattern of the second grating being complementary patterns; The driving device is used for driving the first grating to move between the imaging device and the battery piece to be tested, and the imaging device is used for acquiring a first gray value first image of the battery piece to be tested under the condition that the first grating shields part of light rays emitted by the light source; The driving device is used for driving the second grating to move between the imaging device and the battery piece to be tested, and the imaging device is used for acquiring a first gray value second image of the battery piece to be tested under the condition that the second grating shields part of light rays emitted by the light source; The driving device drives the first grating and the second grating to move until no shielding exists between the imaging device and the battery piece to be detected, and the imaging device is used for acquiring a second gray value image of the battery piece to be detected under the condition that light rays emitted by the light source are not shielded.
6. The resistance testing system of claim 5, wherein the driving means is for driving the first and second gratings to move in a first direction or the driving means is for driving the first and second gratings to move in a second direction; wherein the first direction and the second direction are interdigitated.
7. The resistance testing system of claim 5, further comprising: The device comprises a rotating device, at least two gratings and a driving device, wherein the at least two gratings are positioned on the rotating device, and the driving device is used for driving the at least two gratings to move through the rotating device.
8. The resistance testing system of claim 7, wherein the grating comprises a first grating, a second grating, and a third grating, the pattern of the first grating, the pattern of the second grating, and the pattern of the third grating being complementary patterns; The driving device is used for driving the first grating to move between the imaging device and the battery piece to be tested through the rotating device, and the imaging device is used for acquiring a first gray value first image of the battery piece to be tested under the condition that the first grating shields part of light rays emitted by the light source; The driving device is used for driving the second grating to move between the imaging device and the battery piece to be tested through the rotating device, and the imaging device is used for acquiring a first gray value second image of the battery piece to be tested under the condition that the second grating shields part of light rays emitted by the light source; The driving device is used for driving the third grating to move between the imaging device and the battery piece to be tested through the rotating device, and the imaging device is used for acquiring a first gray value third image of the battery piece to be tested under the condition that the third grating shields part of light rays emitted by the light source; The driving device drives the first grating, the second grating and the third grating to move to the position between the imaging device and the battery piece to be detected through the rotating device, wherein the first grating, the second grating and the third grating are not shielded, and the imaging device is used for acquiring a second gray value image of the battery piece to be detected under the condition that light rays emitted by the light source are not shielded.
9. The resistance testing system of claim 1, wherein the light source comprises a laser light source; the resistance test system also comprises a laser homogenizing device, wherein the laser homogenizing device is used for homogenizing light rays emitted by the laser light source.
10. The resistance testing system of claim 1, wherein the imaging device is a camera, the camera comprising a gray scale camera or a charge coupled device camera.

Description

Resistance test system Technical Field The utility model relates to the technical field of resistance testing, in particular to a resistance testing system. Background In the related art, in order to test the resistance of the battery cell, it is generally necessary to form a circuit by contacting the battery cell with a probe, however, in such a test mode, the battery cell is easily broken under the probe, the probe is used as a consumable material, the cost is increased, the shadow of the probe is also disturbed, and in order to make good contact with the probe, the battery cell pattern needs corresponding welding spots (pads), the cost of the battery cell is increased, and in order to solve the above problems, the resistance of the battery cell to be tested is measured in a material non-contact mode at present, but the accuracy of the measurement result is affected by a non-contact measurement mode. Disclosure of utility model The utility model provides a resistance test system which can realize non-contact measurement of resistance of any metallized pattern battery piece, has good universality and compatibility and can improve accuracy of test results. According to an aspect of the present utility model, there is provided a resistance test system including: the light source is used for emitting light to the battery piece to be tested; The grating is positioned between the imaging device and the battery piece to be tested; the grating is used for shielding part of light rays emitted by the light source; the imaging device is used for respectively acquiring at least two first gray value images of the battery piece to be tested under the condition that the at least two gratings shield part of light rays emitted by the light source; The control module is electrically connected with the imaging device and the light source, and the light source is positioned on one side of the imaging device. On the basis of the above embodiment, optionally, at least two first gray-value images are complementary; the resistance test system further includes: A driving device; The driving device is electrically connected with the control module under the condition that the position of the light source and the position of the battery piece to be measured are fixed, the driving device is connected with at least two gratings and is used for driving the at least two gratings to move, or is connected with the battery piece to be measured under the condition that the position of the light source and the position of the gratings are fixed, and is used for driving the battery piece to be measured to move. On the basis of the embodiment, optionally, the driving device comprises a grating driving device and a battery piece driving device; the grating driving device comprises a servo motor or a stepping motor; The battery piece driving device comprises a conveyor belt. On the basis of the embodiment, the imaging device comprises a first imaging device, a second imaging device and a third imaging device, wherein the light source comprises a first light source, a second light source and a third light source, the grating comprises a first grating and a second grating, and the pattern of the first grating and the pattern of the second grating are complementary patterns; The control module is electrically connected with the first imaging device, the second imaging device, the third imaging device, the first light source, the second light source and the third light source, wherein the first light source is positioned on one side of the first imaging device, and the first imaging device is opposite to the first grating; The driving device is used for driving the battery piece to be tested to move to one side of the first grating far away from the first imaging device, and the first imaging device is used for acquiring a first gray value first image of the battery piece to be tested under the condition that the first grating shields part of light rays emitted by the first light source; The driving device is used for driving the battery piece to be tested to move to one side of the second grating far away from the second imaging device, and the second imaging device is used for acquiring a first gray value second image of the battery piece to be tested under the condition that the second grating shields part of light rays emitted by the second light source; The driving device is used for driving the battery piece to be tested to move to the opposite side of the third imaging device, and the third imaging device is used for acquiring a second gray value image of the battery piece to be tested under the condition that light rays emitted by the third light source are not blocked. On the basis of the above embodiment, optionally, the grating includes a first grating and a second grating, and the pattern of the first grating and the pattern of the second grating are complementary patterns; The driving device is used for driving the first grating to mov