[0029] The technical solution of the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0030] Refer to attached Figure 1-5, a lithium-ion battery thermal runaway test and analysis system, including an experimental device, an electric heating device, a charging device, a discharging device, a testing device, a data acquisition and processing system; the experimental device includes a heat pipe 3 and a heat preservation system; The bottom of the heat pipe 3 is provided with a hook angle 9, so that the longitudinal section of the heat pipe 3 is inverted convex; the outer wall of the heat pipe 3 is wound with a resistance wire 4, and the resistance wire 4 is provided with a The resistance wire access point 10 and the resistance wire connection point 11; the resistance wire 4 is evenly wound with high temperature resistant tape as the resistance wire fixing device 5, the heat pipe 3 is embedded in the heat preservation system, and the inner cavity of the heat pipe 3 forms The lithium-ion battery installation hole 1 is used to install the lithium-ion battery to be tested, and the top of the heat pipe 3 is provided with a temperature sensor installation hole 2 for installing a temperature sensor 7; the heat preservation system includes an iron cylindrical container 8 and a filling The high-temperature-resistant insulation layer 6 formed by the high-temperature-resistant material in the container 8; wherein, the heat-conducting pipe 3 is a copper pipe; the inner diameter of the heat-conducting pipe 3 is 18mm, the outer diameter is 26mm, and the height is 68mm; The hook angle 9 has a length of 1 mm and a height of 3 mm; the lithium-ion battery thermal runaway test and analysis system of this embodiment is suitable for thermal runaway experiments of 18650-type lithium-ion batteries.
[0031] The electric heating device includes a first DC stabilized power supply (30V5A) and resistance wires in the experimental device, and the first DC stabilized power supply is connected to the resistance wires through electric wires. The first DC stabilized power supply is a WYJ-5A30V DC stabilized power supply with an adjustable voltage range of 0-30V, a display accuracy of ±1.2%, a current of 0-5A, and a display accuracy of ±1.5%.
[0032] The charging device is a second DC stabilized power supply (30V50A), and the positive and negative poles of the lithium-ion battery to be tested are connected to the second DC stabilized power supply through electric wires. The second DC stabilized power supply is a KXN-3050D DC stabilized power supply with an adjustable voltage range of 0-30V, a display accuracy of ±1%, a current of 0-50A, and a display accuracy of ±1%.
[0033] The discharge device is a resistance wire for discharge, and the positive and negative poles of the lithium-ion battery to be tested are connected to both ends of the resistance wire for discharge through electric wires. The discharge resistance wire in the discharge device is Cr 20 Ni 80 Type resistance wire, the adjustable resistance range is 0~5Ω.
[0034] The test device includes a temperature sensor; in this embodiment, the temperature sensor is an OMEGA-K type thermocouple with a response time of 0.01s, and the thermocouple is installed in the temperature sensor mounting hole of the experimental device for collecting the lithium-ion battery to be tested. temperature.
[0035] The data acquisition and processing system includes a multi-channel data acquisition instrument and data analysis software; the multi-channel data acquisition instrument is connected with a temperature sensor to collect data, and transmits the data to the data analysis software for analysis and processing. Multi-channel data acquisition instrument is Hydra2620A multi-channel data acquisition instrument in the present embodiment, and resolution is 0.1 ℃, and accuracy is ± 0.45 ℃; Described data analysis software is Hydra series general signal analysis software; Multi-channel data acquisition instrument and The temperature sensor (thermocouple) is connected to collect data, and the data is transmitted to the data analysis software for analysis and processing.
[0036] Constant (or non-constant) heating power lithium-ion battery thermal runaway experiment: before the experiment, the resistance wire access point and the resistance wire connection point of the resistance wire in the experimental device are respectively passed through the positive and negative terminals of the electric wire and the first DC regulated power supply. Pole connection constitutes an electric heating device. During the experiment, insert the lithium-ion battery to be tested into the installation hole of the lithium-ion battery, insert the temperature sensor into the installation hole of the temperature sensor, open the temperature acquisition software, check whether each channel is in working state, and wait for the signal; then, according to the experimental conditions, set Set the voltage and current of the first DC stabilized power supply, start heating, measure the temperature signal by the temperature sensor, and transmit the signal to the data acquisition instrument, and the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested. If the first DC regulated power supply continues to supply power to the resistance wire, the constant heating power lithium-ion battery thermal runaway experiment can be realized; if the first DC regulated power supply continues to supply power to the resistance wire first, and then the lithium-ion battery reaches a certain temperature Stopping the power supply to the resistance wire can realize the thermal runaway experiment of lithium-ion battery with non-constant heating power.
[0037] Thermal runaway experiment of high-rate rechargeable lithium-ion battery at ambient temperature: insert the lithium-ion battery to be tested into the installation hole of the lithium-ion battery, and connect the positive and negative electrodes of the second DC stabilized power supply to the lithium-ion battery to be tested in the experimental device through the electric wires respectively. Connect the positive and negative poles, insert the temperature sensor into the temperature sensor installation hole, open the temperature acquisition software, check whether each channel is in working state, and wait for the signal; then, according to the experimental conditions, set the voltage and current of the second DC stabilized power supply, Lithium-ion battery charging, the temperature signal is measured by the temperature sensor, and the signal is transmitted to the data acquisition instrument, the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, and realizes the thermal runaway experiment of high-rate charging lithium-ion battery at ambient temperature.
[0038] Thermal runaway experiment of high-rate discharge lithium-ion battery at ambient temperature: the lithium-ion battery to be tested is embedded in the installation hole of the lithium-ion battery, and the positive and negative electrodes of the lithium-ion battery to be tested in the experimental device are respectively connected to the electric wire and the resistance wire for discharge. The sensor is embedded in the temperature sensor installation hole, open the temperature acquisition software, check whether each channel is in working condition, and wait for the signal; then, according to the experimental conditions, set the resistance value of the discharge resistance wire, discharge the lithium-ion battery, and measure the temperature by the temperature sensor Signal, and transmit the signal to the data acquisition instrument, the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, and realizes the thermal runaway experiment of the high-rate discharge lithium-ion battery at ambient temperature.
[0039] Thermal runaway experiment of high-rate rechargeable lithium-ion battery under high-temperature environment: the resistance wire entry point and resistance wire connection point of the resistance wire in the experimental device are respectively connected to the positive and negative poles of the first DC stabilized voltage power supply through electric wires to form electric heating device, the positive and negative poles of the lithium-ion battery to be tested are connected to the positive and negative poles of the second DC regulated power supply through electric wires, the temperature sensor is embedded in the temperature sensor installation hole, and the temperature acquisition software is opened to check whether each channel is in working condition and wait for the signal; Then, according to the experimental conditions, set the voltage and current of the first DC regulated power supply, start heating, set the voltage and current of the second DC regulated power supply at the same time, charge the lithium-ion battery, measure the temperature signal by the temperature sensor, And transmit the signal to the data acquisition instrument, the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, which can realize the thermal runaway experiment of the high-rate charging lithium-ion battery in a high-temperature environment.
[0040] Thermal runaway experiment of high-rate discharge lithium-ion battery under high-temperature environment: the lithium-ion battery to be tested is embedded in the installation hole of the lithium-ion battery, and the resistance wire entry point and resistance wire connection point of the resistance wire in the experimental device are respectively connected by the electric wire and The positive and negative poles of the first DC stabilized power supply are connected to form an electric heating device. In the experimental device, the positive and negative poles of the lithium-ion battery to be tested are connected to a discharge resistance wire through an electric wire to form a discharge device. The temperature sensor is embedded in the temperature sensor installation hole. Open the temperature acquisition software, check whether each channel is in working state, and wait for the signal; then, according to the experimental conditions, set the voltage and current of the first DC stabilized power supply, start heating, and set the resistance value of the discharge resistance wire at the same time, When the lithium-ion battery is discharged, the temperature sensor measures the temperature signal and transmits the signal to the data acquisition instrument. The data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, which can realize the thermal runaway experiment of high-rate discharge lithium-ion battery in a high-temperature environment.
[0041] Thermal runaway experiment of high-rate rechargeable lithium-ion batteries under different heat dissipation conditions: Before the experiment, change the material of the high-temperature-resistant insulation layer in the insulation system, and connect the positive and negative electrodes of the lithium-ion battery to be tested to the positive and negative electrodes of the second DC stabilized power supply through the electric wires respectively. pole connection. During the experiment, insert the lithium-ion battery to be tested into the installation hole of the lithium-ion battery, insert the temperature sensor into the installation hole of the temperature sensor, open the temperature acquisition software, check whether each channel is in working state, and wait for the signal; then, according to the experimental conditions, set Set the voltage and current of the second DC regulated power supply, charge the lithium-ion battery, measure the temperature signal by the temperature sensor, and transmit the signal to the data acquisition instrument, and the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, which can realize different Thermal runaway experiment of high-rate rechargeable lithium-ion battery under heat dissipation conditions.
[0042] Thermal runaway experiment of high-rate discharge lithium-ion battery under different heat dissipation conditions: Before the experiment, change the material of the high-temperature-resistant insulation layer in the insulation system, and connect the positive and negative electrodes of the lithium-ion battery to be tested to the resistance wire for discharge through electric wires. During the experiment, insert the lithium-ion battery to be tested into the installation hole of the lithium-ion battery, insert the temperature sensor into the installation hole of the temperature sensor, open the temperature acquisition software, check whether each channel is in working state, and wait for the signal; then, according to the experimental conditions, set The resistance value of the resistance wire used for constant discharge, the lithium-ion battery is discharged, the temperature signal is measured by the temperature sensor, and the signal is transmitted to the data acquisition instrument, and the data acquisition instrument collects and records the temperature of the lithium-ion battery to be tested, which can achieve high temperature under different heat dissipation conditions. Thermal runaway experiment of rate charging lithium-ion battery.
[0043] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.
