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CN-224216852-U - Battery testing device

CN224216852UCN 224216852 UCN224216852 UCN 224216852UCN-224216852-U

Abstract

The application relates to the field of batteries, in particular to a battery testing device, which aims to solve the problem that the testing result of the existing testing device is inaccurate. The battery testing device comprises a plurality of current probes and current wires, wherein the current wires comprise positive current wires and negative current wires, the positive current wires comprise a plurality of positive current transmission wires and a plurality of positive current output wires, the positive current transmission wires are connected with the current probes and form a plurality of contact points with one ends of the positive current output wires, the negative current wires comprise a plurality of negative current transmission wires and a plurality of negative current output wires, and the negative current transmission wires are connected with the current probes and form a plurality of contact points with one ends of the negative current output wires. Through the embodiment, the main grid at the edge of the battery and the main grid at the middle position can respectively transmit current through different contact points, so that the problem of local brightness is avoided, and the test result is more accurate.

Inventors

  • YIN KUN
  • XIN DELEI
  • LIU HAIQIN

Assignees

  • 天合光能股份有限公司

Dates

Publication Date
20260508
Application Date
20250506

Claims (10)

  1. 1. A battery testing device, characterized in that the battery comprises a plurality of main grids, the battery testing device comprises a plurality of current probes (10) and current wires connected with the current probes (10); Wherein the current conductors comprise a positive current conductor (21) and a negative current conductor (22); The forward current lead (21) comprises a plurality of forward current transmission leads (211) and a plurality of forward current output leads (212), wherein the plurality of forward current transmission leads (211) are connected with the current probe (10) and form a plurality of contact points with one ends of the plurality of forward current output leads (212); The negative current lead (22) comprises a plurality of negative current transmission leads (221) and a plurality of negative current output leads (222), wherein the negative current transmission leads (221) are connected with the current probe (10) and form a plurality of contact points with one ends of the negative current output leads (222).
  2. 2. The battery testing device of claim 1, wherein the plurality of forward current transfer conductors (211) form a plurality of equally spaced forward contact points (23) with one end of the plurality of forward current output conductors (212); The plurality of negative current carrying conductors (221) form a plurality of equally spaced negative contact points (24) with one end of the plurality of negative current output conductors (222).
  3. 3. The battery test device according to claim 2, wherein the number of the positive contact points (23) and the negative contact points (24) is the same, and The positive contact point (23) is symmetrical to the position of the negative contact point (24).
  4. 4. The battery testing device of claim 1, further comprising a plurality of voltage probes (30), and And a voltage wire connected to the voltage probe (30).
  5. 5. The battery testing device according to claim 4, wherein the plurality of voltage probes (30) are equally spaced; each voltage probe (30) is connected in series with a resistor (31).
  6. 6. The battery test device according to claim 5, wherein the resistance (31) has a resistance value of 200 Ω to 500 Ω.
  7. 7. The battery testing device of claim 4, wherein the plurality of primary grids are distributed on the first surface of the battery; the plurality of current probes (10) correspond to the plurality of main grids, and the plurality of current probes (10) are used for acquiring current signals of the battery; the plurality of voltage probes (30) correspond to at least part of the main grid, and the plurality of voltage probes (30) are used for acquiring voltage signals of the battery.
  8. 8. The battery testing device according to claim 4, wherein the other ends of the plurality of forward current output wires (212) are connected to form a forward current output total wire (213); The other ends of the negative current transmission wires (221) are connected to form a negative current output total wire (223).
  9. 9. The battery testing apparatus of claim 8, wherein the battery testing apparatus further comprises a testing device; The positive current output total wire (213) and the negative current output total wire (223) are respectively connected to the test equipment; the positive current conductor (21) and the negative current conductor (22) are used for transmitting the current signal to the test device.
  10. 10. The battery testing device according to claim 9, wherein the voltage conductors comprise a positive voltage conductor (41) and a negative voltage conductor (42); one ends of the positive voltage wire (41) and the negative voltage wire (42) are connected with the voltage probes (30), and the other ends of the positive voltage wire (41) and the negative voltage wire (42) are respectively connected into the test equipment; The positive voltage conductor (41) and the negative voltage conductor (42) are used for transmitting the voltage signal to the test device.

Description

Battery testing device Technical Field The application relates to the technical field of batteries, in particular to a battery testing device. Background A Back Contact (BC) cell is a photovoltaic cell in which both positive and negative electrodes are arranged on the Back surface. When testing a BC battery, the BC battery is usually adsorbed on a fixture, and the BC battery is tested by contacting a probe of the test fixture with the positive and negative electrodes of the battery backlight (i.e., the main grid of the battery backlight). However, in actual testing, there may be a difference between the potentials measured by the Voltage pins on the main gate, and the potential difference may bring about a small internal Current, which may interfere with Current-Voltage (IV) testing, i.e., a circulating effect, and affect the accuracy of the test result. In addition, positive and negative currents are respectively led out through one lead, and the connection points of the two leads are respectively arranged at the middle positions of the first row and the last row of probes, so that the current transmission distance of the main grid at the edge position of the battery is longer than that of the main grid at the middle position, and further, the phenomenon of local brightness and darkness occurs during the Electroluminescence (EL) test of the battery, and the test result is influenced. Accordingly, there is a need in the art for a new battery testing device that addresses the above-described problems. Disclosure of utility model The present application is proposed to overcome the above-mentioned drawbacks, and to provide a battery testing device that solves or at least partially solves the technical problem of inaccurate test results when the existing testing device tests BC batteries. The application provides a battery testing device, which comprises a plurality of main grids, wherein the battery testing device comprises a plurality of current probes 10 and current wires connected with the current probes 10; wherein the current conductors include a positive current conductor 21 and a negative current conductor 22; The forward current lead 21 comprises a plurality of forward current transmission leads 211 and a plurality of forward current output leads 212, wherein the plurality of forward current transmission leads 211 are connected with the current probe 10 and form a plurality of contact points with one ends of the plurality of forward current output leads 212; The negative current conducting wire 22 comprises a plurality of negative current transmission conducting wires 221 and a plurality of negative current output conducting wires 222, wherein the negative current transmission conducting wires 221 are connected with the current probe 10 and form a plurality of contact points with one ends of the negative current output conducting wires 222. In one aspect of the above battery testing device, the plurality of forward current transmission wires 211 and one ends of the plurality of forward current output wires 212 form a plurality of equidistant forward contact points 23; The plurality of negative current carrying conductors 221 form a plurality of equally spaced negative contact points 24 with one end of the plurality of negative current output conductors 222. In one embodiment of the above battery testing device, the positive contact points 23 and the negative contact points 24 are the same in number, and The positive contact point 23 is symmetrical to the position of the negative contact point 24. In one aspect of the above battery testing device, the other ends of the plurality of forward current output wires 212 are connected to form a forward current output total wire 213; The other ends of the plurality of negative current transmission wires 221 are connected to form a negative current output total wire 223. In one aspect of the above battery testing apparatus, the battery testing apparatus further includes a plurality of voltage probes 30, and And a voltage wire connected to the voltage probe 30. In one aspect of the above battery testing device, the plurality of voltage probes 30 are distributed at equal intervals; Each of the voltage probes 30 is connected in series with a resistor 31. In one aspect of the above battery testing device, the resistance of the resistor 31 is 200Ω to 500Ω. In one aspect of the above battery testing device, the plurality of main grids are distributed on the first surface of the battery; the plurality of current probes 10 correspond to the plurality of main grids, and the plurality of current probes 10 are used for acquiring current signals of the battery; The plurality of voltage probes 30 correspond to at least part of the main grid, and the plurality of voltage probes 30 are used for acquiring voltage signals of the battery. In one aspect of the above battery testing apparatus, the battery testing apparatus further includes a testing device; The positive current out