Integrated lithium battery external short circuit testing device

Abstract

The utility model discloses an integrated lithium battery external short circuit testing arrangement, include: multichannel explosion -proof box, its inside is equipped with a plurality of independent explosion -proof compartment, be used for accommodating a plurality of lithium battery monomer, and every explosion -proof compartment is equipped with independent pressure -relief mouth, short circuit control module, including resistance regulator and with each lithium battery monomer's branch corresponding switch unit, for controlling each lithium battery monomer external short circuit loop's on -off, central control module is used for controlling switch unit's time -sharing sequence on -off, and setting test parameter, monitoring module includes gas monitoring unit, is used for real -time monitoring electrolyte volatile and thermal runaway characteristic gas. Thus, a testing arrangement can realize a plurality of lithium battery simultaneously test, has improved test efficiency and result consistency and reliability, every explosion -proof compartment independent protection, when thermal runaway, shock wave directional release, gas monitoring unit is combined with pressure -relief mouth, early initiative directional pressure release, avoids secondary accident.

Claims

1. An integrated external short-circuit testing device for lithium batteries, characterized in that, include: The multi-channel explosion-proof box has multiple independent explosion-proof compartments inside, which are used to accommodate multiple lithium battery cells, and each of the explosion-proof compartments is equipped with an independent pressure relief port; The short-circuit control module includes a resistor regulator and a switching unit corresponding to the branch circuit of each of the lithium battery cells, used to control the on / off state of the external short-circuit circuit of each of the lithium battery cells. The central control module is used to control the timing of the switching unit and to set test parameters; The monitoring module includes a gas monitoring unit for real-time monitoring of electrolyte volatiles and thermal runaway characteristic gases. When a characteristic gas is detected, the central control module actively controls the corresponding pressure relief port to open.

2. The integrated lithium battery external short-circuit test device according to claim 1, characterized in that, The multi-channel explosion-proof box is divided into at least two independent compartments by longitudinal explosion-proof isolation steel plates, and each compartment is further divided into multiple independent explosion-proof compartments by transverse high-temperature resistant insulating isolation plates.

3. The integrated lithium battery external short-circuit test device according to claim 2, characterized in that, The gas monitoring unit includes a VOC / H2 / CO / CO2 gas sensor and a pressure sensor.

4. The integrated lithium battery external short-circuit test device according to claim 2, characterized in that, The monitoring module also includes an electrical parameter monitoring unit and an image recording unit. The electrical parameter monitoring unit includes a voltage sensor, a temperature sensor, and a current sensor, which are used to monitor the voltage, temperature, and circuit current of the lithium battery cells in real time during the test. The image recording unit includes a high-speed camera and an infrared thermal imager, which are installed at the top corner of each of the explosion-proof compartments to record the thermal shock wave propagation process and the overall temperature field evolution data of the battery.

5. The integrated lithium battery external short-circuit test device according to claim 1, characterized in that, Each of the explosion-proof compartments has copper alloy busbars symmetrically arranged on its side walls. The positive and negative terminals of the lithium battery cells in the explosion-proof compartments are connected to the copper alloy busbars on both side walls and are electrically connected to the short-circuit circuit.

6. The integrated lithium battery external short-circuit test device according to claim 1, characterized in that, The switching unit is configured as a solenoid valve, and the resistor regulator is configured as a shared unit, which is switched to different battery test circuits through each of the solenoid valves.

7. The integrated lithium battery external short-circuit test device according to claim 2, characterized in that, The explosion-proof isolation steel plate has an explosion-proof pressure resistance of not less than 1 MPa.

8. The integrated lithium battery external short-circuit test device according to claim 2, characterized in that, The high-temperature resistant insulating isolation plate is made of high-temperature resistant ceramic.

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