Immersed battery dynamic temperature control test system

Abstract

The utility model provides a dynamic temperature control test system for an immersed battery. The dynamic temperature control test system comprises a data acquisition control device, an oil pump circulation assembly, a circulation pipeline, a control ball valve, an immersed battery test module and immersion oil. The data acquisition control device is composed of a temperature sensor and a signal acquisition control box, the temperature acquisition sensor is arranged in the immersion device, and a lead of the temperature acquisition sensor is connected with the outer side of the signal acquisition control box. An inlet pipeline and an outlet pipeline of the circulating system are connected with an inlet and an outlet of the immersion device respectively, and the other side of the circulating system is connected with the control ball valve and then connected with the oil pump circulating assembly through a pipeline. The oil pump circulation assembly is composed of an oil tank, a motor, an oil pump, a throttling valve and a pressure reducing valve. The throttling valve and the pressure reducing valve are used for controlling the pressure and flow of an outlet of the circulation system. The immersed battery dynamic temperature control test system provided by the utility model has the advantages of low cost, sensitive temperature adjustment, convenient operation and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a kind of immersion type battery dynamic temperature control test system. BACKGROUND

[0002] In the thermal runaway test process in the field of energy storage battery and power battery, there are still a series of challenges and problems. The accuracy of thermal runaway, especially the runaway test under immersion state, is crucial for evaluating the safety performance of the battery. The industry generally adopts some solutions.

[0003] Invention patent CN116008814A discloses a kind of immersion type cooling battery thermal runaway performance test system and method. The system can cause thermal runaway by battery charge-discharge control test module overcharge, and real-time acquisition battery voltage data and battery current data before and after causing thermal runaway. Patent 202011035446.X discloses an immersion type liquid-cooled battery pack, including a shell, a battery pack, a liquid inlet cavity, a liquid outlet cavity, a current sharing plate, etc. The battery pack is provided with a liquid inlet cavity and a liquid outlet cavity on both sides along the second direction, and the cooling liquid enters the liquid inlet cavity from the liquid inlet, flows through the battery pack and then flows into the liquid outlet cavity, and flows out from the liquid outlet. However, in some cases, for example when the water flow is less than 1L / min, it is difficult to control the temperature difference of the battery pack below 5°C, and when using special cooling liquid and complex system design test system, it has high cost. The test process is complicated and the precision is not high, and needs to be optimized.

[0004] Therefore, developing new test devices and technologies to improve the accuracy, efficiency and universality of the test is still an important research direction in the field of battery thermal safety management. UTILITY MODEL CONTENT

[0005] Based on the above technical problems, the utility model provides an immersion type battery dynamic temperature control test system with low cost, high precision and convenient operation.

[0006] An immersion type battery dynamic temperature control test system includes an immersion type test device, a temperature sensor line

[0007] The temperature sensor wire harness is drawn out from a preset wire hole of the immersion test device, the circulating oil pump assembly is composed of an oil tank, an oil pump, a pressure reducing valve, a pressure gauge, a throttle valve and a flowmeter, and is characterized by sequentially connecting the pipeline, and driving the oil pump by a motor with corresponding power, the signal acquisition control box and the outlet and inlet control ball valves are characterized by being connected with the control ball valves and the temperature sensor wire harness respectively through the control box, and the high-temperature-resistant pipeline is characterized by being connected with the reserved hole of the immersion test device.

[0008] Preferably, the pressure reducing valve can change the output pressure of the immersion test system by adjusting the spring pre-tightening force of the valve core, and the pressure is displayed by the pressure gauge.

[0009] Preferably, the outlet control ball valve and the inlet control ball valve can avoid the reverse flow of oil during the test, and prevent foreign matters from entering the oil tank through unconventional means during the test, thereby preventing the immersion oil in the oil tank from being polluted and the oil pump from being damaged.

[0010] Preferably, the signal acquisition control box can acquire the signals of the temperature sensor and the pressure gauge, and control the opening and closing of the oil pump and the outlet control ball valve and the inlet control ball valve according to the real-time temperature and pressure changes.

[0011] Preferably, one side of the high-temperature-resistant pipeline is connected with the immersion test device by screw fastening, and the other side is connected with the corresponding control ball valve by a movable interface, so that the system installation process is convenient and operable.

[0012] Preferably, the test system can meet the dielectric cooling liquid test of hydrocarbon-based oil, silicone oil, fluorinated liquid, ethylene glycol aqueous solution and the like, and the battery includes not only energy storage batteries, but also power batteries such as solid lithium ion batteries, sodium ion batteries and the like.

[0013] Compared with the prior art, the immersion battery dynamic temperature control test system has the advantages that:

[0014] The immersion battery dynamic temperature control test system has the advantages that:

[0015] The immersion type battery dynamic temperature control test system can not only be suitable for battery conventional thermal management test, but also can monitor and test temperature evolution characteristics of a battery pack under a thermal runaway situation.

[0016] The test method usually needs to place the equipment in a safe explosion-proof room for testing, and the device can realize automatic acquisition of test data.

[0017] The immersion type battery dynamic temperature control test device can adjust the flow and the preset pressure of the circulating system before testing through knob operation, and the pipeline connection uses movable pipe openings to ensure airtightness, and the convenience and safety of installation operation are considered, so that the battery thermal runaway performance in the immersion environment can be satisfied. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an immersion type battery dynamic temperature control test device mentioned in the utility model;

[0019] Figure 2 is a circulating oil pump assembly system mentioned in the utility model;

[0020] Figure 3 is a circulating oil pump assembly system mentioned in the utility model;

[0021]

Explanation of reference signs

[0022] 1-immersion type test device, 2-temperature sensor wire harness, 3-outlet control ball valve, 4-circulating oil pump assembly, 5-inlet control ball valve, 6-signal acquisition control box, 7-high temperature resistant pipeline, 8-oil tank, 9-oil pump, 10-pressure reducing valve, 11-pressure gauge, 12-throttle valve, 13-flow meter, 14-box (wiring hole with sealing rubber plug), 15-upper cover, 16-box explosion-proof pressure relief valve, 17-test battery module, 18-immersion type oil outlet, 19-immersion type oil inlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be described in detail below with reference to the drawings in the embodiments of the utility model. The described embodiments are only some of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] Referring to FIG. 1, FIG. 2 and FIG. 3, an immersion type battery dynamic temperature control test device, as shown in FIG. 1, mainly comprises an immersion type test device 1, a temperature sensor wire harness 2, an outlet control ball valve 3, a circulating oil pump assembly 4, an inlet control ball valve 5, a signal acquisition control box 6, and a high-temperature-resistant pipeline set 7. The immersion type test device 1 is connected with the outlet control ball valve 3 and the inlet control ball valve 5 through the high-temperature-resistant pipeline 7, the tank body of the test device is connected with the high-temperature-resistant pipeline through a pipe thread, the length of the pipeline is appropriate, and the control ball valve is connected to the signal acquisition control box equipment 6 after ensuring that the test device is away from the safety distance. The inlet and outlet control ball valves are connected with the outlet and inlet of the circulating oil pump assembly through a movable thread interface.

[0025] Specifically, as shown in FIG. 2, the circulating oil pump assembly 4 can provide a wide range of flow regulation environment of 1-6.0 L / min (±0.01 L / min), the oil tank 8 can provide total standby cooling oil liquid not less than 2 times of the volume of the immersion oil liquid used in the test system, and the oil tank is externally provided with a liquid level observation line; the oil pump 9 uses a medium-sized gear oil pump, is equipped with a small-power motor to achieve the purpose of long-time stable work, and the motor and the oil pump are placed on a platform above the rectangular oil pump. In the test process, the size of the liquid surface in the oil tank is observed, and an electrical switch is used to realize real-time control of the start and stop of the oil pump. The outlet of the oil pump 9 is connected to a pressure reducing valve 10 through a metal oil pipe, which is used to adjust the pressure of the outlet oil liquid. Similarly, a small-sized pressure reducing valve is equipped with a precision pressure gauge 11, which can provide a pressure regulation environment of 1-8.0 kPa (±0.1 kPa). The overflow port of the pressure reducing valve 10 is directly connected to the oil tank to ensure the constancy of the outlet pressure, and the pressure gauge 11 is fixed above the pressure reducing valve 10. A throttle valve 12 and a flowmeter 13 are installed in the outlet of the pressure reducing valve in sequence. The numbers 10-13 are small-volume instruments, which are fixed above the oil tank through preset thread openings. The oil tank is provided with a foot support at the bottom, an oil filling hole and an oil return inlet at the top, and an oil discharge hole at the bottom of the tank wall, and has hand-held handles on both sides. In the test process, the implementer only needs to carry the oil pump assembly to a predetermined position, connect the inlet and outlet according to FIG. 1, and then the test can be performed.

[0026] Further, as shown in FIG. 3, the immersion type test device specifically comprises a tank body 1 (a wire hole with a sealing rubber plug), an upper cover 2, a tank explosion-proof pressure relief valve 3, a test battery module 4, an immersion type oil liquid outlet 5, a temperature sensor wire harness 2, and an immersion type oil liquid inlet 7. In the test process, the implementer only needs to arrange the battery according to the predetermined mode to trigger the battery thermal runaway, connect the inlet 7 and the outlet 5 according to FIG. 1, and then the test can be performed.

[0027] Further, when the technician uses the immersion battery dynamic temperature control test device, the specific operation is: 1) determine the mode of battery triggering thermal runaway, and arrange the test device 1, make the temperature sensor wire bundle lead out and connect with the control box, use the high temperature resistant pipeline to connect according to the figure 1. 2) start the oil pump power supply, adjust the throttle valve 12 to the full closed state, at this time the pressure gauge 11 number gradually rises, at this time through the adjusting knob of the pressure reducing valve 10, control the preset pressure of the pump outlet; 2) gradually rotate the flow regulating knob of the throttle valve 12 to increase the opening of the throttle valve, the flowmeter 13 can accurately measure the volume flow into the immersion test system 1, and display the total flow after the test starts. 3) when the volume of the box body is consistent with the total flow displayed by the flowmeter, it is indicated that the immersion test device 1 inside meets the immersion test environment. 4) use the means required by the test to trigger thermal runaway, in the initial state, the inlet control ball valve 5 and the outlet control ball valve 3 are in the closed state, when the battery triggers thermal runaway, the signal acquisition control box collects the information of temperature anomaly

[0028] Start the 10s timer, after the rapid increase of the pressure in the immersion box is relieved through the pressure relief valve at the top of the test device, the control ball valve is opened, and the runaway battery is cooled by the flowing liquid to achieve the purpose of testing the immersion battery thermal runaway cycle performance.

[0029] Further, after the test is completed, the oil pump circulation assembly power supply is turned off, the test device is opened, and the battery module is taken out

[0030] 17, remove the thermocouple wire and high temperature resistant pipeline, etc., when disassembling the pipeline, the ball valve is closed first, then the residual oil in the pipeline is poured out by opening the ball valve, and the immersion battery thermal runaway cycle performance test experiment is completed.

[0031] It should be further noted that although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An immersion battery dynamic temperature control test system, comprising: The immersion test device (1), the temperature sensor wire harness (2), the outlet control ball valve (3), the inlet control ball valve (5), the circulating oil pump assembly (4), the signal acquisition control box (6) and the high-temperature-resistant pipeline (7) are characterized in that the temperature sensor wire harness (2) is led out from a preset wire hole of the immersion test device (1); the circulating oil pump assembly is composed of an oil tank (8), an oil pump (9), a pressure reducing valve (10), a pressure gauge (11), a throttle valve (12) and a flowmeter (13), and the pipelines are sequentially connected; wherein the oil pump (9) is driven by a corresponding power motor; the signal acquisition control box (6) is connected with the outlet control ball valve (3) and the inlet control ball valve (5) and the temperature sensor wire harness (2) respectively; and the high-temperature-resistant pipeline (7) is connected with the reserved hole of the immersion test device (1). 2.The dynamic temperature control test system for an immersed battery of claim 1, wherein: The pressure reducing valve (10) can change the output pressure of the immersion test system by adjusting the valve core spring pre-tightening force, and the pressure is displayed by the pressure gauge (11); the throttle valve (12) can adjust the inlet flow of the test system, and measure the total flow into the test system within a specified time period, and the flow is displayed by the flowmeter (13). 3.The dynamic temperature control test system for an immersed battery of claim 1, wherein: The outlet control ball valve (3) and the inlet control ball valve (5) can avoid the reverse flow of oil during the test, and prevent foreign matter from entering the oil tank during the test by unconventional means, thereby preventing the immersion oil in the oil tank (8) from being contaminated and the oil pump (9) from being damaged.

4. The dynamic temperature control test system for an immersed battery of claim 3, wherein: The signal acquisition control box (6) can collect the signals of the temperature sensor and the pressure gauge (11), and control the opening and closing of the oil pump (9) and the outlet control ball valve (3) and the inlet control ball valve (5) according to the real-time temperature and pressure changes; wherein the temperature sensor is mainly arranged at the center of the large surface of the battery or the internal center.

5. The dynamic temperature control test system for an immersed battery of claim 4, wherein: One side of the high-temperature-resistant pipeline (7) is connected with the immersion test device (1) by screw fastening, and the other side is connected with the corresponding outlet control ball valve (3) and inlet control ball valve (5) by using a movable interface, so that the system installation process is convenient and operable.

6. The dynamic temperature control test system for an immersed battery of claim 5, wherein: The test system meets the dielectric cooling liquid test of hydrocarbon-based oil, silicone oil, fluorinated liquid and ethylene glycol aqueous solution, and the battery is a battery for energy storage or a battery for power.

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