阅读说明：本技术 电池测试装置及电池测试方法 (Battery testing device and battery testing method ) 是由 谢毅 周公庆 马志强 王璞 陈坤 于 2020-06-03 设计创作，主要内容包括：本申请提供了电池测试装置及电池测试方法,涉及电池检测技术领域。电池测试装置采用具有高透光性和高导电率的透明导电玻璃与电池的正面电极和背面电极接触,一方面可以将电流导入电池片内部,实现导电；另一方面该结构不会阻挡测试EL和PL的红外摄像头测试图像,可以减少电池正面和背面被遮挡的问题,使得测试的图像更加准确。采用平整的透明导电玻璃作为测试面,电池能够展平在透明导电玻璃平面上,完全与玻璃平面接触,可以防止电池被探针压的不平整,而引起的碎片问题。在测试双面电池时,可以直接从电池的下方测试PL。而不需要更换探针排,从而保证测试的快速。(The application provides a battery testing device and a battery testing method, and relates to the technical field of battery detection. The battery testing device adopts transparent conductive glass with high light transmittance and high conductivity to contact with the front electrode and the back electrode of the battery, so that on one hand, current can be led into the battery piece to realize conductivity; on the other hand, the structure can not block the infrared camera test images for testing EL and PL, and can reduce the problem that the front and back of the battery are shielded, so that the test images are more accurate. The flat transparent conductive glass is used as a test surface, the battery can be flattened on the plane of the transparent conductive glass and is completely contacted with the plane of the glass, and the problem of fragments caused by the unevenness of the battery pressed by the probe can be prevented. In testing a double sided battery, PL can be tested directly from below the battery. And the probe row does not need to be replaced, thereby ensuring the test speed.)

1. A battery testing apparatus, comprising:

the battery testing device comprises a bracket, wherein a first transparent conductive glass and a second transparent conductive glass are arranged on the bracket, a space for accommodating a battery to be tested is formed between the first transparent conductive glass and the second transparent conductive glass, and the first transparent conductive glass, the battery to be tested and the second transparent conductive glass can be electrically connected to form a conductive loop;

an imager configured to capture an image of the battery under test; and

the light source is configured to emit light to the space of the battery to be tested at one side of the battery to be tested, which is far away from the imager.

2. The battery testing device according to claim 1, wherein the bracket comprises a first frame and a second frame, the first transparent conductive glass is disposed in the first frame, the second transparent conductive glass is disposed in the second frame, and a limiting block is disposed on a surface of the first frame, which is close to the second frame, for limiting a position of the battery to be tested relative to the first transparent conductive glass.

3. The battery testing device according to claim 2, wherein the stopper is slidably connected to the first frame, and the stopper is configured to be slidable relative to the first frame to push the battery to be tested placed on the first transparent conductive glass to move relative to the first transparent conductive glass.

4. The battery testing device of claim 2 or 3, wherein the first frame and the second frame are movably connected, and the second frame is configured to be able to approach or move away from the first frame to change the size of the space between the first transparent conductive glass and the second transparent conductive glass.

5. The battery testing device according to claim 1, wherein the first transparent conductive glass and the second transparent conductive glass are single-sided conductive structures, and the conductive layer of the first transparent conductive glass is arranged opposite to the conductive layer of the second transparent conductive glass.

6. The battery testing device according to claim 1 or 5, wherein the first transparent conductive glass and the second transparent conductive glass are connected to a wire through edges of the respective conductive layers, respectively.

7. The battery testing device according to claim 1, wherein the imager is disposed on a side of the second transparent conductive glass away from the first transparent conductive glass and corresponds to a central position of the second transparent conductive glass.

8. The battery testing device according to claim 7, wherein the light source is disposed on a side of the first transparent conductive glass away from the second transparent conductive glass, and corresponds to a center position of the first transparent conductive glass.

9. A battery testing method for testing a battery using the battery testing apparatus according to any one of claims 1 to 8, comprising: first transparent conductive glass await measuring the battery and under the state of second transparent conductive glass formation conductive loop, utilize the imager catches the light image of the battery that awaits measuring, and/or first transparent conductive glass await measuring the battery and under the state that the second transparent conductive glass disconnection electricity is connected, utilize the light source shines the battery that awaits measuring, reuse the imager catches the light image of the battery that awaits measuring.

10. The method for testing a battery according to claim 9, wherein the imager is disposed on a side of the second transparent conductive glass away from the first transparent conductive glass, and the light source is disposed on a side of the first transparent conductive glass away from the second transparent conductive glass, and comprises:

placing a double-sided battery to be tested on the first transparent conductive glass, and adjusting the second transparent conductive glass to be in complete contact with the double-sided battery to be tested; switching on a power supply to enable the first transparent conductive glass, the double-sided battery to be tested and the second transparent conductive glass to be electrically connected to form a conductive loop, and capturing an optical image of the double-sided battery to be tested by the imager;

the light source is opened to enable light to irradiate on the double-sided battery to be detected under the state that the first transparent conductive glass, the double-sided battery to be detected and the second transparent conductive glass are electrically disconnected, and the imager is used for capturing the image of the double-sided battery to be detected.

Technical Field

The application relates to the technical field of battery detection, in particular to a battery testing device and a battery testing method.

Background

The EL tester is called as an electroluminescence tester, is an internal defect detection device of a solar cell or a cell module, utilizes the electroluminescence principle of crystalline silicon, adopts a high-resolution CCD (charge coupled device) camera to shoot a near-infrared image of the module, and obtains and judges the defects of the module.

The PL tester is collectively referred to as a photoluminescence tester: when a semiconductor material is excited by light, electrons transit from a low energy level to a high energy level, and electron-hole pairs are generated to form non-equilibrium carriers. After a period of time, the excited electrons return to a lower energy state and recombination of electron-hole pairs occurs. The non-equilibrium electrons can directly cross the forbidden band to recombine with the valence band holes, and can also recombine with the holes after being trapped by the localized states in the forbidden band. Recombination can be radiative recombination, i.e. luminescence, or non-radiative surface recombination, auger recombination and multiphoton-emitting recombination. During recombination, electron-hole pairs are called photoluminescence if they release excess energy in the form of light.

The EL test requires connection to the electrodes. Conventionally, it is necessary to use a lead wire and a probe pin to press the electrodes on both sides of the cell sheet. While PL testing does not require the use of probes for testing. Both test methods cannot be completed in the same test rack, requiring the rack to be replaced after the EL test is completed, and then testing the PL image. If the probe bank is not replaced, the probe bank will block the image of the PL test, thus affecting the results of the test. There is also a problem. In the process of taking images, if undistorted images are desired, the camera needs to be placed above the center position, and infrared imaging can be taken by using a CCD camera in both EL and PL. However, they use different spectral ranges, so that separate cameras must be used, and there is no way to place two CCD cameras in the center of the same side of the cell, resulting in a problem of distortion of the image taken by one of the cameras.

Disclosure of Invention

The application aims to provide a battery testing device and a battery testing method so as to realize the electroluminescent test and the photoluminescence test of a battery by adopting the same testing device.

In a first aspect, an embodiment of the present application provides a battery testing apparatus, which includes a bracket, an imager, and a light source. Be equipped with first transparent conductive glass and second transparent conductive glass on the support, have the space that is used for holding the battery that awaits measuring between first transparent conductive glass and the second transparent conductive glass, first transparent conductive glass, the battery that awaits measuring and second transparent conductive glass can form electrically conductive return circuit through the electricity connection. The imager is configured to capture an image of the battery under test. The light source is configured to emit light to the space of the battery under test at a side of the battery under test away from the imager.

The battery testing device adopts transparent conductive glass with high light transmittance and high conductivity to contact with the front electrode and the back electrode of the battery, so that on one hand, current can be led into the battery piece to realize conductivity; on the other hand, the structure can not block the infrared camera test images for testing EL and PL, and can reduce the problem that the front and back of the battery are shielded, so that the test images are more accurate. The flat transparent conductive glass is used as a test surface, the battery can be flattened on the plane of the transparent conductive glass and is completely contacted with the plane of the glass, and the problem of fragments caused by the unevenness of the battery pressed by the probe can be prevented. In testing a double sided battery, PL can be tested directly from below the battery. And the probe row does not need to be replaced, thereby ensuring the test speed.

Compared with the prior art that current is poured through the probe, the contact area between the electrodes on the front side and the back side of the cell piece and the conducting layer of the transparent conductive glass is large, so that the current is led in more smoothly, and imaging is clearer. The problem of probe contact can not cause that certain area of the battery piece is dark or has high brightness, so that the brightness is not uniform, and the accuracy of a tested image is not influenced.

In a possible implementation manner, the bracket includes a first frame and a second frame, the first transparent conductive glass is disposed in the first frame, the second transparent conductive glass is disposed in the second frame, and a limiting block is disposed on a surface of the first frame, which is close to the second frame, for limiting a position of the battery to be tested relative to the first transparent conductive glass.

The battery to be tested is limited at a specified position through the limiting block, for example, the center position of the first transparent conductive glass, and the accuracy of the tested image is improved.

In one possible implementation manner, the limiting block is connected with the first frame in a sliding manner, and the limiting block is configured to be capable of sliding relative to the first frame so as to push the battery to be tested placed on the first transparent conductive glass to move relative to the first transparent conductive glass.

The structure is convenient for moving the battery to be tested, the battery to be tested is placed at the edge of the first transparent conductive glass, and the battery to be tested is moved to the center of the first transparent conductive glass by adjusting the limiting block.

In one possible implementation, the first frame and the second frame are movably connected, and the second frame is configured to be capable of approaching or departing from the first frame so as to change the size of the space between the first transparent conductive glass and the second transparent conductive glass.

The structure is convenient for taking and placing the battery, the second frame is moved to be away from the first frame before the battery piece is placed, the battery to be tested is placed on the first transparent conductive glass, and the second frame is moved to be in complete contact with the upper surface of the second transparent conductive glass and the battery to be tested.

In one possible implementation manner, the first transparent conductive glass and the second transparent conductive glass are single-sided conductive structures, and the conductive layer of the first transparent conductive glass is arranged opposite to the conductive layer of the second transparent conductive glass. The structure enables the first transparent conductive glass, the battery to be tested and the second transparent conductive glass to be conducted.

In one possible implementation, the first transparent conductive glass and the second transparent conductive glass are respectively connected with the conducting wire through the edge of the conducting layer.

The connecting structure can not shield the imaging image and does not influence the accuracy of the test image.

In a possible implementation manner, the imager is disposed on a side of the second transparent conductive glass far away from the first transparent conductive glass, and corresponds to a central position of the second transparent conductive glass. In a possible implementation manner, the light source is disposed on a side of the first transparent conductive glass, which is far away from the second transparent conductive glass, and corresponds to a central position of the first transparent conductive glass.

The structure ensures that the test position is shot in the center, the images of EL and PL are not distorted, and the test result is convenient to correspond to the EL or other analysis images of the battery piece.

In a second aspect, a battery testing method is provided, including: the method comprises the steps of capturing an optical image of a battery to be tested by using an imager in a state that a first transparent conductive glass, the battery to be tested and a second transparent conductive glass form a conductive loop, and/or irradiating the battery to be tested by using a light source in a state that the first transparent conductive glass, the battery to be tested and the second transparent conductive glass are disconnected from each other in an electric connection manner, and capturing the optical image of the battery to be tested by using the imager.

According to the testing method, the transparent conductive glass with high light transmittance and high conductivity is contacted with the front electrode and the back electrode of the battery, so that the problem that the front surface and the back surface of the battery are shielded is solved, and the tested image is more accurate. The contact area between the transparent conductive glass and the battery is larger, so that the current is led in more smoothly, and the imaging is clearer. Meanwhile, the flat transparent conductive glass is used as a test surface, the battery can be flatly laid on the plane of the transparent conductive glass and is completely contacted with the plane of the glass, and the problem of fragments caused by the unevenness of the battery pressed by the probe can be prevented. The test method can realize the EL test and the PL test of the double-sided battery without moving the battery and replacing the test bracket, and has the advantages of simple operation and high detection efficiency.

In one possible implementation manner, the imager is disposed on a side of the second transparent conductive glass far away from the first transparent conductive glass, and the light source is disposed on a side of the first transparent conductive glass far away from the second transparent conductive glass, including: placing the double-sided battery to be tested on the first transparent conductive glass, and adjusting the second frame to enable the second transparent conductive glass to be in complete contact with the double-sided battery to be tested; switching on a power supply to enable the first transparent conductive glass, the double-sided battery to be tested and the second transparent conductive glass to be electrically connected to form a conductive loop, and capturing an image of the double-sided battery to be tested by an imager; and under the condition that the first transparent conductive glass, the double-sided battery to be tested and the second transparent conductive glass are electrically disconnected, turning on the light source to enable light to irradiate the double-sided battery to be tested, and capturing the image of the double-sided battery to be tested by using the imager.

In the actual detection process, the test sequence can be adjusted as required, for example, the electrical connection is firstly performed, the image of the double-sided battery to be tested is captured, then the electrical connection is disconnected, the double-sided battery to be tested is illuminated and the image of the double-sided battery to be tested is captured, or the electrical connection is performed by firstly illuminating the double-sided battery to be tested and capturing the image of the double-sided battery to be tested, then the light source is turned off, and the electrical connection is performed to capture the image of.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a battery testing apparatus according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a first frame and a first transparent conductive glass provided in an embodiment of the present application.

Icon: 10-double-sided battery to be tested; 20-a wire; 100-a battery test device; 110-a scaffold; 111-a first frame; 112-a second frame; 113-a first transparent conductive glass; 114-a second transparent conductive glass; 115-a limiting block; 120-an imager; 130-light source.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The existing EL machine structure for testing the battery piece is generally characterized in that a CCD camera is arranged above the EL machine structure and is specially used for testing a light source, a testing support is arranged below the EL machine structure, the battery piece is positioned between the testing supports, a group of corresponding testing probe rows are respectively arranged above and below the testing support, and the probe rows are in contact with a front electrode and a back electrode of the battery piece. And when negative electricity is introduced into the front surface and positive electricity is introduced into the back surface, the battery generates electroluminescence phenomenon, and various defects in the battery piece are tested. Disadvantages of existing EL test tests include the following:

the EL tester can only test EL (electroluminescence) alone, and if PL (photoluminescence) needs to be tested, the probe bank needs to be disassembled, so that the operation is troublesome and the test time is seriously affected.

2. In the devices of the present common combination of PL and EL, the picture taken is distorted. This is because the PL and EL cameras are on the top side, but the positions for taking pictures cannot be both taken, so only one camera of the EL or PL is located directly above the cell, while the other cameras can only be arranged side by side. Such distorted EL or PL images are disadvantageous for analyzing the structure of the cell. The inability of the distorted EL and PL images to correspond to the position of the cell creates analytical difficulties.

3. When the probes are used for testing the EL, a large number of probes are used for pressing the battery piece from top to bottom, and the situation of fragments is easy to occur. In addition, the thickness of the battery piece in the industry is thinner and thinner, the thickness is close to 160 micrometers, the size of the battery piece is larger and larger, and the battery with the side length of 210mm is gradually popularized, so that the situation of fragments is easy to occur in the process of testing EL. And the thinner and bigger battery slice is easy to bend on the track, so the battery slice is easy to be scratched by the metal probe, and the poor slice on the electrical property and the appearance is caused.

4. When the metal probe is used for testing the EL, the probe is easy to have poor contact after being used for a period, so that the probe needs to be replaced by a new probe, and the cost of the equipment is increased.

5. When a metal probe is used for testing EL, if a battery piece is placed on a track and slight deviation occurs, the probe is easy to press down an electrode without a quasi battery piece, so that current cannot be normally led into the battery piece, and the condition that an EL image to be tested is not clear enough or even shooting fails can be caused.

In view of the above technical problems, the present application adopts transparent conductive glass as an electrode contacting with a double-sided cell, on one hand, the back surface is ensured not to be shielded by a probe bank and the like, the accuracy of testing an EL image is increased, and a PL image of the back surface of a cell piece can be tested simultaneously. On the other hand, the battery piece is completely flattened and pressed on the conductive glass and is not suitable to be crushed. Particularly, the large-size 210 mm-diameter battery piece in the industry is easier to bend in a testing machine under the influence of gravity, so that the testing device provided by the application is more suitable to be used.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery testing apparatus 100 according to the present embodiment.

The present embodiment provides a battery testing apparatus 100, which includes a bracket 110, an imager 120 and a light source 130. The bracket 110 is used for placing the double-sided battery 10 to be tested, and the imager 120 and the light source 130 are used for testing the double-sided battery 10 to be tested placed on the bracket 110.

The bracket 110 includes a first frame 111 and a second frame 112 disposed opposite to each other, wherein a first transparent conductive glass 113 is disposed in the first frame 111, and a second transparent conductive glass 114 is disposed in the second frame 112. This application adopts transparent conductive glass, utilizes its high light transmissivity and high conductivity, replaces prior art's test probe. A gap for accommodating the double-sided battery 10 to be tested is formed between the first transparent conductive glass 113 and the second transparent conductive glass 114, the battery is placed on the first transparent conductive glass 113 or the second transparent conductive glass 114, and the first transparent conductive glass 113, the double-sided battery 10 to be tested and the second transparent conductive glass 114 can form a conductive loop through electrical connection. In the present embodiment, the first frame 111 is disposed below, and the second frame 112 is disposed above.

In some embodiments of the present application, the first transparent conductive glass 113 and the second transparent conductive glass 114 are single-sided conductive structures, and a conductive layer of the first transparent conductive glass 113 is disposed opposite to a conductive layer of the second transparent conductive glass 114. So that the conductive layer of the first transparent conductive glass 113 and the conductive layer of the second transparent conductive glass 114 are respectively in contact with two surfaces of the double-sided battery 10 to be tested, thereby realizing the electrical conduction.

Referring to fig. 2, fig. 2 is a schematic structural diagram of the first frame 111 and the first transparent conductive glass 113. In some embodiments of the present application, the first transparent conductive glass 113 and the second transparent conductive glass 114 are respectively connected to the conducting wires 20 through edges of the conducting layers thereof, and current is supplied through the conducting wires 20 to form a conducting loop.

In order to facilitate taking and placing the battery pieces, the first frame 111 and the second frame 112 in the embodiment of the present application are movably connected, that is, the first frame 111 and the second frame 112 can move relatively, so as to change the size of the space between the first transparent conductive glass 113 and the second transparent conductive glass 114. The specific connection mode is a general technology in the field, and the application does not limit the connection mode. Before placing the double-sided battery 10 to be tested, the second frame 112 is moved away from the first frame 111, and after placing the double-sided battery 10 to be tested on the first transparent conductive glass 113, the second frame 112 is moved to make the second transparent conductive glass 114 completely contact with the upper surface of the double-sided battery 10 to be tested.

In order to define the position of the double-sided battery 10 to be tested, the double-sided battery 10 to be tested is positioned at the middle position of the first transparent conductive glass 113 to obtain clear imaging. The surface of the first frame 111 close to the second frame 112 is provided with a limiting block 115 for limiting the position of the double-sided battery 10 to be tested relative to the first transparent conductive glass 113. As an implementation manner, the limiting block 115 is slidably connected to the first frame 111, and the limiting block 115 is configured to be able to slide relative to the first frame 111 to push the double-sided battery 10 to be tested placed on the first transparent conductive glass 113 to move relative to the first transparent conductive glass 113. Namely, the position of the limiting block 115 is adjusted to change the limited size of the limiting block, so that the limiting blocks of the battery pieces with different sizes can be limited. Meanwhile, the double-sided battery 10 to be tested may be placed at the edge of the first transparent conductive glass 113, and then the double-sided battery 10 to be tested is moved to the center of the first transparent conductive glass 113 by adjusting the limiting block 115. In some embodiments of the present application, the limiting block 115 is slidably connected to the first frame 111 through a clip and a slot. The limiting block 115 is an L-shaped structure, one end of the limiting block 115 is slidably connected to the first frame 111, and the other end of the limiting block 115 can penetrate into a space between the first transparent conductive glass 113 and the second transparent conductive glass 114 to push the double-sided battery 10 to be tested. In other embodiments of the present application, the sliding connection may be implemented by using a connection manner with the same function, which is not limited in the present application. In this embodiment, two limiting blocks 115 are respectively disposed on four borders of the first frame 111. In other embodiments of the present application, the number and shape of the limiting blocks 115 can be adjusted as needed.

The imager 120 and the light source 130 are respectively disposed at both sides of the first transparent conductive glass 113 and the second transparent conductive glass 114 to test the to-be-tested double-sided battery 10 placed between the first transparent conductive glass 113 and the second transparent conductive glass 114. In the present embodiment, the imager 120 is disposed above the second transparent conductive glass 114, and the light source 130 is disposed below the first transparent conductive glass 113.

Further, in order to improve the imaging accuracy and avoid image distortion, the imager 120 and the light source 130 are disposed corresponding to the center position of the first transparent conductive glass 113 and the center position of the second transparent conductive glass 114, respectively. In this embodiment, the first frame 111 and the second frame 112 have the same size, the first transparent conductive glass 113 and the second transparent conductive glass 114 have the same size, and the first frame 111 and the second frame 112 are completely opposite and horizontally disposed. As one implementation, above the second transparent conductive glass 114 is a camera for testing EL, and below the first transparent conductive glass 113 is a camera for testing PL. The test procedure for testing EL and PL is done by using transparent conductive glass, focusing the test process into one test rack 110, the top test EL image and the bottom test PL image. When testing the EL image of the battery, the upper electrode is connected to the negative electrode and the lower electrode is connected to the positive electrode, and the current is applied, and the EL image is tested by using the upper EL camera. When a PL image of a double-sided battery piece is tested, the first transparent conductive glass 113 and the second transparent conductive glass 114 do not need to be moved, current does not need to be switched on, and after infrared laser is irradiated on the battery piece, a PL infrared camera is directly used for shooting a picture of the battery piece.

The working principle is as follows:

according to the method, the first transparent conductive glass 113 and the second transparent conductive glass 114 are in complete contact with the two sides of the double-sided battery, a conductive loop is formed after current is connected, a near-infrared image is shot on one side of the double-sided battery 10 to be tested by using an imager 120 (a high-resolution CCD camera) by utilizing the electroluminescence principle of crystalline silicon, the defect of the double-sided battery 10 to be tested is obtained and judged, and the EL test of the battery is realized. Because the first transparent conductive glass 113 and the second transparent conductive glass 114 have high light transmittance, and no part is arranged near the double-sided battery to shield the surface of the battery, the battery can be moved, no current is required to be connected, the light source 130 is directly arranged on the other side of the double-sided battery 10 to be tested to emit light to the battery, and a test image is obtained through the imager 120, so that the PL test of the battery is realized.

The beneficial effect of this application includes:

(1) the test support 110 provided by the application adopts transparent conductive glass with high light transmittance and high conductivity to contact with the front electrode and the back electrode of the battery, so that on one hand, current can be led into the battery piece to realize conductivity; on the other hand, the structure can not block the infrared camera test images for testing EL and PL, and can reduce the problem that the front and back of the battery are shielded, so that the test images are more accurate.

(2) Compared with the prior art that current is poured through the probe, the contact area between the electrodes on the front side and the back side of the cell piece and the conducting layer of the transparent conductive glass is large, so that the current is led in more smoothly, and imaging is clearer. The problem of probe contact can not cause that certain area of the battery piece is dark or has high brightness, so that the brightness is not uniform, and the accuracy of a tested image is not influenced.

(3) The flat transparent conductive glass is used as a test surface, the battery can be flattened on the plane of the transparent conductive glass and is completely contacted with the plane of the glass, and the problem of fragments caused by the unevenness of the battery pressed by the probe can be prevented. Particularly, as the size of the battery is larger and larger at present, the size of the battery piece reaches 210mm, even the size of the battery piece in the future may be larger, the battery piece is easier to be in a bending state under the action of gravity, and the fragment rate is higher.

(4) When the double-sided battery is tested, PL can be directly tested from the lower part of the battery. And the probe row does not need to be replaced, thereby ensuring the test speed. And moreover, the image of the PL can be ensured to be shot from the right center of the lower testing position, the image of the PL can not be distorted, and the testing result can be conveniently corresponding to the EL or other analysis images of the battery plate.

(5) The application provides a testing arrangement can also be used as test anti infrared detecting instrument that deviates from. When the double-sided battery 10 to be tested is used, the double-sided battery can be placed below the testing support 110, the transparent conductive glass is used as electrodes on the front side and the back side of the battery, positive charges and negative charges are respectively led in, infrared images of the double-sided battery are tested, and abnormal reasons possibly occurring in the corresponding area of the double-sided battery 10 to be tested are analyzed.

The present application further provides a battery testing method, which tests a battery by using the above battery testing apparatus 100, and includes: the method comprises the steps of capturing an image of the double-sided battery 10 to be tested by using an imager 120 in a state that the first transparent conductive glass 113, the double-sided battery 10 to be tested and the second transparent conductive glass 114 form a conductive loop, and/or irradiating the battery to be tested by using a light source 130 in a state that the first transparent conductive glass 113, the double-sided battery 10 to be tested and the second transparent conductive glass 114 are electrically disconnected, and capturing the image of the double-sided battery 10 to be tested by using the imager 120.

As an implementation manner, the double-sided battery 10 to be tested is placed on the first transparent conductive glass 113, and the second frame 112 is adjusted to make the second transparent conductive glass 114 completely contact with the double-sided battery 10 to be tested; switching on the power supply to enable the first transparent conductive glass 113, the double-sided battery 10 to be tested and the second transparent conductive glass 114 to form a conductive loop through electrical connection; the imager 120 receives the optical signal from the double-sided battery 10 to be tested to perform the electroluminescence test.

After the detection is finished, the battery does not need to be moved, and in a state that the first transparent conductive glass 113, the double-sided battery 10 to be detected and the second transparent conductive glass 114 are electrically disconnected, the light source 130 is turned on so that infrared light irradiates the double-sided battery 10 to be detected, and the imager 120 receives an optical signal sent by the double-sided battery 10 to be detected so as to perform a photoluminescence test.

The battery testing method is simple and convenient to operate, and the EL test and the PL test of the battery can be realized without moving the battery and replacing the test bracket 110. The test method has accurate test result and is not easy to generate fragment condition.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.