Clamp applied to battery detection

Abstract

A frame is installed on the periphery of a light-transmitting plate, two sets of translation grooves with the corresponding heights are formed in one set of opposite side edges of the frame, the two sets of translation grooves are formed in the upper portion of the light-transmitting plate in an up-and-down mode, and the two ends of two clamping rods are connected into the corresponding set of translation grooves in the lower side respectively. The probe plate is connected in one group of translation grooves on the upper side, an ampere meter terminal and a voltmeter terminal are led out from the probe plate, the other group of opposite side edges of the frame are respectively connected with a support column on the base through a shaft, and a handle is arranged at the outer end of the shaft. When the positive electrode and the negative electrode are both designed on the same face of the battery and on the two faces of the battery respectively, compatible fixation is conducted on the solar battery during IV testing, the battery is fixed through the movable clamping rod, the probe plate is installed on the movable moving rod, flexible adjustment can be achieved, the device is particularly suitable for fixing the small-size battery, the battery is firmly fixed, and the working efficiency is improved. And the overturning of the test bench does not affect the clamping and fixing of the battery.

Description

Technical Field

[0001] The present application relates to a detection fixture for solar cells. Background Art

[0002] Photoelectric conversion efficiency is the most direct test method for evaluating the performance of solar cells. Currently, IV test equipment is mainly composed of a simulated sunlight light source, a test source meter, a computer with analysis software, a battery fixture, etc.

[0003] Due to the differences in battery structure and battery testing conditions, during IV testing, it is impossible to use the same battery fixture to complete the testing of different types of solar cells. Instead, the battery fixture needs to be replaced to adapt to batteries of different structures and sizes. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a fixture for battery testing, which is suitable for compatible fixation of solar cells when the positive and negative electrodes are designed on the same side of the battery or on two sides of the battery respectively, and is particularly suitable for small-sized batteries.

[0005] Technical solution: A fixture used for battery testing, including a test bench, a base, and a conductive plate. The test bench includes a light-transmitting plate, a frame, a clamping rod, and a probe plate. The frame is installed around the light-transmitting plate. Two groups of translation grooves with corresponding heights are opened on a group of opposite sides of the frame. The two groups of translation grooves are both above the light-transmitting plate and arranged up and down. The two ends of the two clamping rods are respectively connected to a group of translation grooves on the lower side, and the probe plate is connected to a group of translation grooves on the upper side. Ammeter terminals and voltmeter terminals are led out from the probe plate. Another group of opposite sides of the frame are respectively connected to the pillars on the base through shafts, and a handle is installed at the outer end of the shaft.

[0006] The battery is placed on the light-transmitting plate with the light-receiving side facing downward, the two clamping rods are moved to clamp and fix a set of opposite sides of the battery, the probe plate is moved to contact and conduct with the positive grid line and the negative grid line on the back of the battery, and the test bench is rotated to make the light-receiving side of the battery facing upward to perform IV test;

[0007] The conductive plate is placed on the light-transmitting plate, and the battery is placed on the conductive plate with the light-receiving surface facing upward. All the grid lines on the back of the battery are in contact with the conductive plate and are conductive. The two clamping rods are moved to clamp and fix a set of opposite side edges of the battery, and the probe board is moved to contact and be conductive with the grid lines on the light-receiving surface of the battery to perform IV testing.

[0008] Furthermore, the conductive plate is made of pure gold or gold-plated copper, and the light-transmitting plate is made of quartz, which has high light transmittance, thereby ensuring that the light-receiving surface of the battery is illuminated by a simulated sunlight light source.

[0009] Furthermore, fastening nuts are provided at both ends of the clamping rod, and the fastening nuts are abutted and fastened against the outer surface of the side edge of the frame.

[0010] Furthermore, the clamping surface of the clamping rod is a vertical plane. The battery located between the two clamping rods directly contacts the battery side surface through the clamping surface, and the vertical plane can effectively contact the battery side surface in a plane, so that the battery can be reliably clamped and fixed.

[0011] Furthermore, the probe plate is mounted on a moving rod, and the two ends of the moving rod are connected to a group of translation grooves on the upper side, the probe plate and the moving rod form a sliding connection in the length direction, and fastening nuts are provided at both ends of the moving rod, and the fastening nuts are fastened against the outer side of the side edge of the frame. The position of the probe plate can be adjusted in multiple directions.

[0012] Beneficial effects: The clamp used for battery testing of the present invention is suitable for compatible fixation of solar cells during IV testing when the positive and negative electrodes are designed on the same side of the battery or on both sides of the battery respectively; the movable clamping rod fixes the battery, and the movable movable rod installs the probe plate, which can be flexibly adjusted and is particularly suitable for fixing small-sized batteries. The battery is firmly fixed, and the flipping of the test bench does not affect the clamping and fixation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0014] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0015] A fixture for battery testing, as shown in the attached Figure 1 As shown, it includes a test bench 1, a base 2, and a conductive plate 3.

[0016] The test bench 1 includes a light-transmitting plate 11 , a frame 12 , a clamping rod 13 , and a probe plate 14 . The light-transmitting plate 11 needs to have high light transmittance, such as being made of quartz material. The frame 12 is installed around the light-transmitting plate 11 .

[0017] Two groups of translation grooves 15 with corresponding heights are provided on a group of opposite side edges 121 and 122 of the frame 12. Both groups of translation grooves are above the light-transmitting plate and arranged up and down. Two clamping rods 13 are placed in a group of translation grooves 151 on the lower side. Both ends of the clamping rods 13 are in the two translation grooves 151. The two clamping rods can move parallel to the light-transmitting plate along the translation grooves. Fastening nuts are provided at both ends of the clamping rods 13. When the fastening nuts are tightened, they are abutted and fastened against the outer side surfaces of the side edges 121 and 122 to fix the position of the clamping rods 13 in the translation grooves 15. The opposite surfaces of the two clamping rods 13 are clamping surfaces 131. The battery is located between the two clamping rods. The clamping surface directly contacts the side surface of the battery to clamp and fix the battery. For this purpose, the clamping surface 131 is designed as a vertical plane, which can effectively contact the side surface of the battery in a plane. A moving rod 141 is placed in a group of translation grooves 152 on the upper side, and both ends of the moving rod 141 are in the two translation grooves 152. The moving rod can move parallel to the light-transmitting plate along the translation grooves. Fastening nuts are set at both ends of the moving rod 141. When the fastening nuts are tightened, they are abutted and fastened against the outer side surfaces of the side edges 121 and 122 to fix the position of the moving rod 141 in the translation groove 152. The probe plate 14 is installed on the moving rod 141, and the probe 142 on the probe plate 14 faces the light-transmitting plate. The probe plate 14 and the moving rod 141 adopt a sliding rail matching form in the length direction, and the two form a sliding connection.

[0018] There are at least two probes 142 on the probe board 14 , and an ammeter terminal and a voltmeter terminal are connected from all the probes 142 . The two ammeter terminals are used to connect to a source meter to test current, and the two voltmeter terminals are used to connect to a source meter to test voltage.

[0019] The test bench 1 is located above the base 2, and another set of opposite side edges 123 and 124 of the frame 12 are respectively connected to the pillars 21 set on the base 2 through the shafts 16. The test bench 1 can be flipped as a whole through the shafts 16 at both ends. A handle 17 is installed at the outer end of the shaft 16 to facilitate the operation of rotating the test bench 1. The handle 17 has a locking structure, which can be locked after being rotated into place to keep the position of the test bench fixed.

[0020] The clamp used for battery detection of the present invention is suitable for compatible fixing of solar cells during IV testing when both positive and negative electrodes are designed on the same side of the battery. The battery should be placed on a light-transmitting plate with its backlight facing upward and its light-receiving side facing downward, and two clamping rods should be moved to clamp and fix a group of opposite sides of the battery, and then the moving rod should be moved to make the probes on the probe plate contact and conduct with the positive grid lines and negative grid lines on the back of the battery respectively, and the grid lines and probes should be able to contact and conduct, and after the clamping rods and the moving rods are fixed, the handle is turned to flip the test bench to the transparent plate facing upward, so that the light-receiving side of the battery faces upward, and the simulated sunlight light source is irradiated on the light-transmitting plate from top to bottom, and the positive grid lines on the back of the battery effectively contact and conduct with at least one probe, and the negative grid lines on the back of the battery effectively contact and conduct with at least one probe, and the probes are then led out through the ammeter terminal and the voltmeter terminal to connect with the source meter, forming a loop for IV testing.

[0021] Solar cells with positive and negative electrodes designed on the same surface, such as: perovskite stacked (BC) crystalline silicon cells, perovskite single junction cells, perovskite stacked perovskite cells. When such cells are installed on the fixture for battery testing of the present invention, the gate electrode can be kept in an upward position for probe alignment to avoid the gate electrode being in a downward position that is not conducive to probe alignment.

[0022] The fixture used for battery detection of the present invention is also suitable for compatible fixing of solar cells during IV testing when positive and negative electrodes are designed on both sides of the battery respectively. The conductive plate 3 needs to be placed on the light-transmitting plate 11 first. The material of the conductive plate 3 is pure gold or copper plated with gold. Then the battery should be placed on the conductive plate with the backlight facing downward and the light-receiving side facing upward. The conductive plate is not less than the maximum design size of the battery. When the battery to be tested is placed on the conductive plate, all the grid lines on the back of the battery are in contact with the conductive plate for conduction. The two clamping rods are moved to clamp and fix a group of opposite sides of the battery. Then the moving rods are moved to make the probes on the probe plate contact with the grid lines on the light-receiving side of the battery for conduction. The grid lines and the probes can be in contact with each other for conduction. The simulated sunlight light source is irradiated on the light-receiving side of the battery from top to bottom. The positive grid line electrode on the back of the battery is effectively in contact with the conductive plate for conduction. The negative grid line electrode on the light-receiving side of the battery is effectively in contact with at least one probe for conduction. The probe is then connected to the source meter through the ammeter terminal and the voltmeter terminal to form a loop for IV testing.

[0023] A solar cell with positive and negative electrodes designed on both sides, such as TOPCon, HJT, PERC crystalline silicon cells, and perovskite stacked (TOPCon, HJT, PERC) crystalline silicon cells.

[0024] The clamp used for battery testing of the present invention uses a movable clamping rod to fix the battery, and uses a movable moving rod to install the probe plate, which can be flexibly adjusted and compatible with different sizes, and is particularly suitable for fixing small-sized batteries. The battery is firmly fixed, and the flipping of the test bench does not affect the clamping and fixing of the battery. The probe can ensure effective contact and conduction with the auxiliary grid line, and is also applicable to batteries without main grid.

Claims

1. A fixture for battery testing, characterized in that: The test bench (1) comprises a light-transmitting plate (11), a frame (12), a clamping rod (13), and a probe plate (14). The frame (12) is installed around the light-transmitting plate (11). Two groups of translation grooves (15) with corresponding heights are provided on a group of opposite sides of the frame (12). The two groups of translation grooves (15) are both above the light-transmitting plate (11) and arranged up and down. The two ends of the two clamping rods (13) are respectively connected to a group of translation grooves (15) on the lower side. The probe plate (14) is connected to a group of translation grooves (15) on the upper side. Ammeter terminals and voltmeter terminals are led out from the probe plate (14). Another group of opposite sides of the frame (12) are respectively connected to pillars (21) on the base (2) through shafts (16). A handle (17) is installed at the outer end of the shaft (16). The battery is placed on the light-transmitting plate (11) with the light-receiving surface facing downward, the two clamping rods (13) are moved to clamp and fix a set of opposite sides of the battery, the probe plate (14) is moved to contact and conduct with the positive grid line and the negative grid line on the back of the battery, and the test bench (1) is rotated to make the light-receiving surface of the battery facing upward, and an IV test is performed; The conductive plate (3) is placed on the light-transmitting plate (11), and the battery is placed on the conductive plate (3) with the light-receiving surface facing upward, and all the grid lines on the back of the battery are in contact with the conductive plate (3) for conduction, and the two clamping rods (13) are moved to clamp and fix a group of opposite sides of the battery, and the probe plate (14) is moved to contact and conduct with the grid lines on the light-receiving surface of the battery to perform an IV test.

2. A fixture for battery testing according to claim 1, characterized in that: The material of the conductive plate (3) is pure gold or copper plated with gold, and the material of the light-transmitting plate (11) is quartz.

3. A fixture for battery testing according to claim 1, characterized in that: The two ends of the clamping rod (13) are provided with fastening nuts, and the fastening nuts are abutted and fastened against the outer surface of the side edge of the frame (12).

4. The fixture for battery testing according to claim 1, characterized in that: The clamping surface (131) of the clamping rod (13) is a vertical plane.

5. The fixture for battery testing according to claim 1, characterized in that: The probe plate (14) is installed on the moving rod (141), and the two ends of the moving rod (141) are connected to a group of translation grooves (15) on the upper side. The probe plate (14) and the moving rod (141) form a sliding connection in the length direction. Fastening nuts are arranged at both ends of the moving rod (141), and the fastening nuts are fastened to the side edges of the frame (12) and their outer surfaces.

Images