CN219830019U - Testing device - Google Patents

Abstract

The embodiment of the utility model discloses a testing device. Specifically, the testing device is used for carrying out gas production test on the battery to be tested, and the testing device comprises: a sealed box inside which the battery to be tested is accommodated; the pressure monitoring device is arranged in the sealing box and is used for monitoring the pressure in the sealing box; the vacuum pump is arranged outside the sealing box and is in sealing connection with the sealing box and used for pumping the inside of the sealing box into a negative pressure state. The testing device provided by the embodiment of the utility model has a simple structure, can reduce the probability of air leakage of the device and improves the accuracy of the gas production test.

Description

Testing device

Technical Field

The utility model relates to the technical field of batteries, in particular to a testing device.

Background

With the development of new energy technology, power batteries are widely used in various fields. During the charge-discharge cycle of the power battery, gas is generated in the power battery, so that the air pressure in the power battery is increased, the power battery is broken due to the fact that the air pressure is increased to a certain degree, and the electrolyte flows out to cause accidents. In order to reduce the probability of accidents of the power battery, the gas production of the power battery can be tested in the production process of the power battery, and then the material system, electrolyte and the like in the power battery are optimized according to the test result.

However, part of gas generated in the power battery is stored in the electrolyte or between the isolating film and the pole piece, so that the gas is not easily discharged, and the gas production test result of the power battery is inaccurate. In view of this, how to improve the accuracy of the gas production test of the power battery is a problem to be solved.

Disclosure of Invention

The embodiment of the utility model provides a testing device which is simple in structure, can reduce the probability of air leakage of the device and improves the accuracy of gas production testing.

In a first aspect, there is provided a testing device for performing a gassing test on a battery to be tested, the testing device comprising: a sealed box inside which the battery to be tested is accommodated; the pressure monitoring device is arranged in the sealing box and is used for monitoring the pressure in the sealing box; the vacuum pump is arranged outside the sealing box and is in sealing connection with the sealing box and used for pumping the inside of the sealing box into a negative pressure state.

In the embodiment of the utility model, the testing device comprises the sealing box, the pressure monitoring device and the vacuum pump, wherein the battery to be tested is accommodated in the sealing box, the pressure monitoring device can monitor the pressure in the sealing box, and the vacuum pump can pump the interior of the sealing box into a negative pressure state, so that the gas production test is carried out on the battery to be tested in the sealing box in the negative pressure state, the gas produced in the battery to be tested in the negative pressure state is easy to discharge, the gas produced by the battery to be tested is concentrated in the sealing box instead of being concentrated in a plurality of pipelines, the testing device has a simple structure, and the probability of gas leakage of the device can be reduced.

In some embodiments, the test device further comprises: and the temperature measuring device is arranged inside the sealing box and is used for measuring the temperature in the sealing box.

In the embodiment of the utility model, the temperature measuring device is arranged in the sealing box of the testing device to measure the temperature in the sealing box, so that the interior of the sealing box can be in a constant temperature state, the influence of the temperature on the gas production test can be reduced, and the accuracy of the gas production test is improved.

In some embodiments, the test device further comprises: humidity monitoring device, set up in inside the seal box is used for monitoring humidity in the seal box.

According to the embodiment of the utility model, the humidity monitoring device is arranged in the sealing box, so that the humidity in the sealing box can meet the requirement of the gas production test, and the accuracy of the gas production test is improved.

In some embodiments, the test device further comprises: and the temperature control device is arranged inside the sealing box and used for controlling the temperature in the sealing box.

According to the embodiment of the utility model, the temperature control device is arranged in the sealed box, so that the temperature in the sealed box is similar to the temperature of the battery to be tested under the actual working condition, and the accuracy of the gas production test can be improved.

In some embodiments, the temperature control device comprises a resistance wire and a fan for distributing heat generated by the resistance wire inside the sealed box.

According to the embodiment of the utility model, the temperature control device comprises the resistance wire and the fan, the fan disperses heat generated by the resistance wire in the sealing box, so that the temperature in the sealing box can be increased, the temperature field in the sealing box is distributed uniformly, the temperature in the sealing box meets the gas production test requirement, and the accuracy of the gas production test is improved.

In some embodiments, the test device further comprises: and the charging and discharging device is arranged in the sealing box and is used for charging and/or discharging the battery to be tested.

In the embodiment of the utility model, the charging and discharging device is arranged in the sealed box to charge and/or discharge the battery to be tested, so that the charging and discharging device and the battery to be tested are electrically connected in the sealed box, the connection mode between the charging and discharging device and the battery to be tested is stable, and the accuracy of the gas production test is improved.

In some embodiments, the charge and discharge device includes a pole of a charge and discharge apparatus and a charge and discharge control device for controlling movement of the pole of the charge and discharge apparatus.

In the embodiment of the utility model, the charging and discharging device comprises the pole of the charging and discharging equipment and the charging and discharging control device, so that the charging and discharging control device can control the movement of the pole of the charging and discharging equipment, the charging and discharging equipment is convenient to charge and/or discharge the battery to be tested, and the efficiency of the gas production test is improved.

In some embodiments, the enclosure includes an observation window for observing conditions inside the enclosure.

In the embodiment of the utility model, the sealing box comprises the observation window for observing the condition inside the sealing box, so that the condition inside the sealing box can be observed through the observation window, when the condition such as connection failure and the like occurs inside the sealing box, the condition is treated in time, the probability of failure in the gas production test process is reduced, and the efficiency of the gas production test is improved.

In some embodiments, the testing device is configured to test the gas discharged through the one-way valve of the battery to be tested, where the one-way valve is disposed in the liquid injection hole of the battery to be tested.

In the embodiment of the utility model, the gas exhausted through the one-way valve of the battery to be tested is tested through the testing device, and the external gas of the battery to be tested is not easy to enter the interior of the battery to be tested, so that the testing result of the testing device is not easy to be interfered by the outside, the probability that the external gas of the battery to be tested influences the gas production testing result is reduced, and the accuracy of the gas production test is improved.

In some embodiments, the test device further comprises: and the first gas pipeline is used for gas transmission between the vacuum pump and the sealing box.

In the embodiment of the utility model, the gas transmission between the vacuum pump and the seal box is realized by arranging the first gas pipeline, so that the vacuum pump and the seal box can be free from the influence of external environment, the gas is transmitted, the seal box is in a negative pressure state conveniently, and the accuracy of the gas production test is improved.

In some embodiments, the test device further comprises: and a second gas pipeline for gas transmission between the inside and the outside of the sealing box.

In the embodiment of the utility model, the second gas pipeline is arranged to realize the exchange of the gas in the sealed box and the external gas, thereby reducing the probability of deformation, difficult opening and other conditions caused by the difference between the gas pressure inside and outside the sealed box, and being beneficial to improving the efficiency of the gas production test.

In some embodiments, the first gas line and/or the second gas line comprises at least one of a PVC pipe, a PE pipe, a teflon pipe, and a silicone pipe.

In the embodiment of the utility model, the first gas pipeline and/or the second gas pipeline comprises at least one of a PVC pipeline, a PE pipeline, a Teflon pipeline and a silica gel pipeline, so that the gas transportation in the testing device is facilitated, and the accuracy of the gas production test is also facilitated to be improved.

In some embodiments, the test device further comprises: and the data line is used for data transmission between the sealing box and the computer.

In the embodiment of the utility model, the data transmission between the sealing box and the computer can be realized by arranging the data line, so that the control of the gas production test and the recording of the gas production test result are facilitated, and the efficiency of the gas production test is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a testing device according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a testing device and a computer according to an embodiment of the present utility model.

Fig. 3 shows a schematic flow chart of a method for using the test device according to the embodiment of the utility model.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the utility model and are not intended to limit the scope of the utility model, i.e., the utility model is not limited to the embodiments described.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present utility model and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the utility model. In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

With the development of new energy technology, the power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

During the charge-discharge cycle of the power battery, gas is generated in the power battery, so that the air pressure in the power battery is increased, the power battery is broken due to the fact that the air pressure is increased to a certain degree, and the electrolyte flows out to cause accidents. In order to reduce the probability of accidents of the power battery, the gas production of the power battery can be tested in the production process of the power battery, and then the material system, electrolyte and the like in the power battery are optimized according to the test result.

However, part of gas generated in the power battery is stored in the electrolyte or between the isolating film and the pole piece, and is not easy to be discharged in normal pressure environment or positive pressure environment, so that the gas production test result of the power battery can be affected. And the gas production test result of the power battery is easily affected by temperature, for example, when the temperature is low, the gas production volume obtained by the test may be smaller than that under the actual working condition.

In addition, the common battery gas production testing device has a complex structure, is easy to generate gas leakage and affects the gas production testing result of the battery.

In view of this, an embodiment of the present utility model provides a testing device for performing a gassing test on a battery to be tested, the testing device including: the sealed box is used for accommodating the battery to be tested; the pressure monitoring device is arranged in the sealed box and is used for monitoring the pressure in the sealed box; the vacuum pump is arranged outside the sealing box and is in sealing connection with the sealing box and used for pumping the interior of the sealing box into a negative pressure state. The testing device comprises a sealing box, a pressure monitoring device and a vacuum pump, wherein the battery to be tested can be contained in the sealing box, the pressure monitoring device can monitor the pressure in the sealing box, and the vacuum pump can pump the interior of the sealing box into a negative pressure state, so that the gas production test is carried out on the battery to be tested in the sealing box under the negative pressure state, the gas produced in the battery to be tested under the negative pressure state is easy to discharge, the gas produced by the battery to be tested is concentrated in the sealing box instead of being concentrated in a plurality of pipelines, the structure of the testing device is simple, and the probability of gas leakage of the device can be reduced.

Fig. 1 shows a schematic structural diagram of a testing device according to an embodiment of the present utility model. As shown in fig. 1, the testing device 100 is used for performing a gassing test on a battery 200 to be tested, and the testing device 100 includes: a sealed case 110, inside of which the battery 200 to be tested is accommodated; the pressure monitoring device 120 is arranged inside the sealing box 110 and is used for monitoring the pressure inside the sealing box 110; the vacuum pump 130 is disposed outside the seal box 110 and is in sealing connection with the seal box 110, for pumping the interior of the seal box 110 into a negative pressure state.

Specifically, the testing device 100 is configured to perform the gas production test on the battery 200 to be tested, and may be configured to perform the test on the condition of the gas produced by the gas production rate, and the like of the battery 200 to be tested. As shown in fig. 1, the sealing case 110 may be a sealed and airtight case, and a plurality of devices, such as a pressure monitoring device 120, may be disposed inside the case, and the case may be square, rectangular or irregularly shaped, which is not limited in the present utility model. When the gas production test is performed, the battery 200 to be tested may be contained in the sealed box 110, for example, the battery 200 to be tested shown in fig. 1 is contained in the sealed box 110, and after the battery 200 to be tested discharges gas, the gas pressure in the sealed box 110 increases, so that the gas production test of the battery 200 to be tested may be implemented by monitoring the pressure in the sealed box 110.

The pressure monitoring device 120 may be used to monitor the pressure inside the sealed box 110, for example, monitor the pressure or vacuum in the sealed box 110, and may be a digital manometer or a vacuum gauge, etc., so that the air tightness of the testing device 100 and/or the gas yield of the battery may be determined by the monitored pressure change or vacuum change.

The vacuum pump 130 may pump the sealing case 110 by mechanical, physical, chemical or physicochemical means to pump the sealing case 110 to a negative pressure state. The vacuum pump 130 may be, for example, a gas delivery pump, and may be, for example, a gas trapping pump. As shown in fig. 1, the vacuum pump 130 and the seal box 110 may be in a sealed connection, for example, by a gas line or the like.

The test device 100 includes a sealing case 110, a pressure detection device 120, and a vacuum pump 130, wherein the battery 200 to be tested is accommodated in the sealing case 110, the pressure monitoring device 120 can monitor the pressure in the sealing case 110, and the vacuum pump 130 can pump the sealing case 110 into a negative pressure state, so that the gas production test is performed on the battery 200 to be tested in the sealing case 110 in the negative pressure state, so that the gas produced in the battery 200 to be tested in the negative pressure state is easily discharged, and the gas produced by the battery 200 to be tested is concentrated in the sealing case 110 instead of being concentrated in a plurality of pipelines, the test device 100 has a simple structure, and the probability of gas leakage of the device can be reduced, so that the test device 100 provided by the utility model can improve the accuracy of the gas production test.

In the embodiment of the present utility model, the testing device 100 further includes a temperature measuring device 140 disposed inside the sealing box 110 for measuring the temperature inside the sealing box 110.

Specifically, the temperature measuring device 140 may be used to measure the temperature inside the sealing box 110, observe the temperature change inside the sealing box 110, so that the inside of the sealing box 110 is in a constant temperature state. The temperature measuring device 140 may include a temperature sensor such as a thermocouple, etc., and may also include a display meter or a recording meter, etc.

Therefore, by arranging the temperature measuring device 140 in the sealing box 110 of the testing device 100 to measure the temperature inside the sealing box 110, the sealing box 110 can be in a constant temperature state, so that the influence of the temperature on the gas production test can be reduced, and the accuracy of the gas production test can be improved.

In the embodiment of the present utility model, the testing device 100 further includes a humidity monitoring device 150 disposed inside the sealing box 110 for monitoring the humidity inside the sealing box 110.

Specifically, the humidity monitoring device 150 may be used to monitor the humidity within the seal box 110, and may be, for example, a humidity sensor, a hygrometer, or the like.

Because the humidity change in the seal box 110 can influence the gas production test result in the seal box 110, the humidity in the seal box 110 can meet the requirement of the gas production test by arranging the humidity monitoring device 150 in the seal box 110, and the accuracy of the gas production test is improved.

In the embodiment of the present utility model, the testing device 100 further includes a temperature control device 160 disposed inside the sealing box 110 for controlling the temperature inside the sealing box 110.

Specifically, the temperature control device 160 is configured to control the temperature in the sealed box 110, which may be to control the temperature increase in the sealed box 110, or to control the temperature decrease in the sealed box 110, so that the temperature in the sealed box 110 is the same as or less different from the temperature under the actual working condition of the battery 200 to be tested.

Therefore, by arranging the temperature control device 160 inside the sealing box 110, the temperature inside the sealing box 110 is similar to the temperature of the battery 200 to be tested under the actual working condition, and the accuracy of the gas production test can be improved.

Alternatively, as shown in fig. 1, the temperature control device 160 includes a resistance wire 161 and a fan 162, and the fan 162 is used to spread heat generated by the resistance wire 161 inside the sealing case 110.

Specifically, the resistance wire 161 is capable of converting electrical energy into thermal energy, and may be, for example, a nichrome resistance wire. The fan 162 can raise the pressure of the gas and discharge the gas, so as to drive the heat energy generated by the resistance wire 161 to be dissipated inside the sealing box 110.

Therefore, the temperature control device 160 comprises the resistance wire 161 and the fan 162, the fan 162 disperses heat generated by the resistance wire 161 inside the sealing box 110, so that the temperature inside the sealing box 110 can be increased, the temperature field inside the sealing box 110 is distributed more uniformly, the temperature inside the sealing box 110 can meet the gas production test requirement, and the accuracy of the gas production test is improved.

In the embodiment of the present utility model, the testing device 100 further includes a charging and discharging device 170 disposed inside the sealed box 110, for charging and/or discharging the battery 200 to be tested.

Specifically, the charge and discharge device 170 is used to implement operations such as charging, discharging, or charge and discharge cycles of the battery 200 to be tested. The charging and discharging device 170 may include a charging and discharging apparatus and a connection member of the charging and discharging apparatus such as a post for connection with the battery 200 to be tested, or the charging and discharging device 170 may include a connection member of the charging and discharging apparatus such as a post for connection with the battery 200 to be tested, in which case the charging and discharging apparatus may be disposed outside the sealed case 110.

It should be understood that when the volume of the charge and discharge device is large, the charge and discharge device disposed inside the sealed case 110 occupies a large space of the sealed case 110, and at this time, the charge and discharge device may be disposed outside the sealed case 110, and a part of the components connected to the battery 200 to be tested, such as a post of the charge and discharge device, may be disposed inside the sealed case 110.

Therefore, by arranging the charge and discharge device 170 inside the sealed box 110, the battery 200 to be tested is charged and/or discharged, so that the charge and discharge device 170 and the battery 200 to be tested are electrically connected inside the sealed box 110, and the connection mode between the charge and discharge device and the battery is stable, thereby being beneficial to improving the accuracy of the gas production test.

Alternatively, as shown in fig. 1, the charge and discharge device 170 includes a pole 171 of the charge and discharge apparatus and a charge and discharge control device 172, and the charge and discharge control device 172 is used to control movement of the pole 171 of the charge and discharge apparatus.

Specifically, the charge and discharge control device 172 may be used to control the lifting of the pole 171 of the charge and discharge apparatus, such as a servo motor or a stepper motor. So that the charge and discharge control device 172 can press-connect the electrode post 171 of the charge and discharge device with the electrode plate of the battery 200 to be tested together to realize electrical connection.

Therefore, the charging and discharging device 170 includes the electrode post 171 of the charging and discharging device and the charging and discharging control device 172, so that the charging and discharging control device 172 can control the movement of the electrode post 171 of the charging and discharging device, which is convenient for realizing charging and/or discharging of the battery 200 to be tested by the charging and discharging device, and is beneficial to improving the efficiency of the gas production test.

In an embodiment of the present utility model, the sealing case 110 includes an observation window 111 for observing the condition inside the sealing case 110.

Specifically, the observation window 111 may be used to observe connection conditions, operation states, etc. of at least part of devices in the sealed case 110, for example, connection conditions of the electrode post 171 of the charge and discharge apparatus with the battery 200 to be tested may be observed. The observation window 111 may be disposed on at least one surface of the sealing case 110, and the number of the observation windows 111 may be one or more, which is not limited in the present utility model.

Therefore, the sealing box 110 comprises the observation window 111 for observing the condition inside the sealing box 110, so that the condition inside the sealing box 110 can be observed through the observation window 111, when the condition such as connection fault occurs inside the sealing box 110, the condition is treated in time, the probability of fault occurrence in the gas production test process is reduced, and the gas production test efficiency is improved.

In the embodiment of the present utility model, the testing device 100 is used for testing the gas discharged through the check valve 210 of the battery 200 to be tested, and the check valve 210 is disposed at the liquid injection hole of the battery 200 to be tested.

Specifically, the check valve 210 includes a directional control valve for controlling the flow of the air in one direction, and is disposed on the liquid injection hole of the battery 200 to be tested, and when the internal pressure of the battery 200 to be tested is greater than the external pressure, the check valve 210 is opened, otherwise the check valve 210 is closed, and the internal environment of the battery 200 to be tested is isolated from the external environment. The check valve 210 may be, for example, a spring-type check valve, a diaphragm-type pressure valve, or the like.

Therefore, the test device 100 is used for testing the gas exhausted through the check valve 210 of the battery 200 to be tested, and the external gas of the battery 200 to be tested is not easy to enter the battery 200 to be tested, so that the test result of the test device 100 is not easy to be interfered by the outside, the probability that the external gas of the battery 200 to be tested influences the gas production test result is reduced, and the accuracy of the gas production test is improved.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the testing apparatus 100 further includes a first gas line 181 for gas transfer between the vacuum pump 130 and the sealing box 110.

Specifically, the sealed connection between the vacuum pump 130 and the seal box 110 is achieved by a first gas line 181, and the first gas line 181 may transfer gas between the vacuum pump 130 and the seal box 110.

Optionally, a vacuum valve 1810 may be disposed on the first gas pipeline 181, where the vacuum pump 130 may pump air from the seal box 110 until the seal box 110 is in a negative pressure state in a state where the vacuum valve 1810 is opened, and the vacuum valve 1810 may be closed.

Therefore, through setting up the gas transmission between the first gas line 181 realization vacuum pump 130 and the seal box 110 for can not receive the influence of external environment between vacuum pump 130 and the seal box 110, the transmission gas, the seal box 110 of being convenient for is in the negative pressure state, is favorable to promoting the degree of accuracy of gas production test.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the test apparatus 100 further includes: a second gas line 182 for gas transfer between the inside and the outside of the sealing case 110.

Specifically, the second gas line 182 may be used for outputting the internal gas of the sealing case 110 to the external space, or may be used for inputting the external gas of the sealing case 110 to the internal space, so that the internal and external gas pressures of the sealing case 110 may be balanced.

Optionally, a relief valve 1820 may be disposed on the second gas pipeline 182, where the interior of the seal box 110 is in communication with the exterior when the relief valve 1820 is in an open state, and the interior of the seal box 110 is isolated from the exterior when the relief valve 1820 is in a closed state.

Therefore, by arranging the second gas pipeline 182, the exchange between the gas inside the seal box 110 and the external gas is realized, so that the probability of deformation, difficult opening and other conditions caused by the difference between the gas pressure inside and outside the seal box 110 is reduced, and the efficiency of the gas production test is improved.

In an embodiment of the present utility model, the first gas line 181 and/or the second gas line 182 includes at least one of a polyvinyl chloride (polyvinyl chloride, PVC) pipe, a Polyethylene (PE) pipe, a teflon pipe, and a silicone pipe.

Specifically, the gas pipeline in the test device 100 can meet conditions of low probability of permeation, adsorption and reaction of the gas generated in the battery, and the like, so that the gas transportation is facilitated.

Therefore, by providing the first gas pipeline 181 and/or the second gas pipeline 182 including at least one of a PVC pipe, a PE pipe, a teflon pipe, and a silica gel pipe, the gas transportation inside the test apparatus 100 is facilitated, and the accuracy of the gas production test is also facilitated to be improved.

In some embodiments, the vacuum valve 1810 and/or the pressure relief valve 1820 may be a connection component in the gas line that is air tight and removable, and may include, for example, a threaded luer adapter or a quick connector, etc.

In an embodiment of the present utility model, the test apparatus 100 further includes a data line 190 for data transmission between the seal box 110 and the computer.

Specifically, the data line 190 may transmit data of the vacuum degree, the temperature, the humidity, etc. in the sealing case 110 to a computer, which stores various data, for example, the computer 300 shown in fig. 2 and the testing apparatus 100 may be connected through the data line 190. For example, the data line 190 may be an RS485 interface line or an RS232 interface line, etc., and the computer may be a PC computer, etc., which is not limited in the present utility model.

In addition, optionally, software may be provided in the computer 300 to collect the state data and the charge and discharge data in the seal box 110, and generate a test curve, and store the test curve in a designated path of the computer 300.

Therefore, by setting the data line 190, data transmission between the seal box 110 and the computer 300 can be realized, which is convenient for controlling the gas production test and recording the result of the gas production test, and is beneficial to improving the efficiency of the gas production test.

Fig. 3 shows a schematic flow chart of a method for using the test device 100 according to the embodiment of the utility model. As shown in fig. 3, the usage method 400 includes:

s410, connecting the testing device 100 with the computer 300, and setting a testing flow and testing parameters of the gas production test on the computer 300;

s420, closing a pressure release valve 1820, placing the battery 200 to be tested in the sealed box 110, and connecting a pole 171 of the charge-discharge device with a pole piece of the battery 200 to be tested;

s430, raising the temperature in the sealed box 110 to a test temperature by using the temperature control device 160, closing the pressure relief valve 1820, opening the vacuum valve 1810, opening the vacuum pump 130 to exhaust air until the air pressure in the sealed box 110 reaches the test atmospheric pressure and is stable, and closing the vacuum valve 1810 after the humidity in the sealed box 110 meets the test requirement;

s440, maintaining for 10 minutes under the test atmospheric pressure, and determining that the pressure in the seal box 110 is unchanged by using the pressure monitoring device 120;

s450, starting a gas production test based on the set test flow and test parameters, and recording test data in the gas production test process by using the computer 300;

s460, after the charging process and/or the discharging process is finished for 30min, the pressure release valve 1820 is opened, so that the air pressure in the sealing box 110 is restored to normal pressure.

In some embodiments, when the charge and discharge device is disposed outside the sealing case 110, the charge and discharge device may be connected with the sealing case 110 in step S410 described above.

In some embodiments, the step S420 may further include: a temperature sensor is provided on one surface of the battery 200 to be tested, for example, a temperature sensing wire is posted on one surface of the battery 200 to be tested (e.g., an explosion-proof valve).

In some embodiments, the test parameters in the method 400 described above may be the same as the parameters associated with the battery formation process.

In some embodiments, the test atmospheric pressure in the step S430 may be 30kPa to 50kPa, for example, any value of 30kPa, 40kPa, 50 kPa. It should be noted that, when the test atmospheric pressure is smaller, the electrolyte inside the battery 200 to be tested is easily extracted, which affects the gas production test structure; when the test atmospheric pressure is large, the gas generated in the battery 200 to be tested is not easy to be discharged, and the gas generation test result is also influenced, so that the gas discharge in the battery 200 to be tested is facilitated by setting the test atmospheric pressure in a certain range, and the accuracy of the gas generation test can be improved.

In some embodiments, the step S440 can detect the air tightness of the sealing box 110, and the pressure of the sealing box 110 is unchanged, which indicates that the air tightness of the sealing box 110 is good and no air leakage occurs.

In some embodiments, in step S450, the gas production test may be started by controlling the gas production test process by software in the computer 300, for example, by clicking "start" on the software in the computer 300, to control the connection of the pole 171 of the charge and discharge device to the pole piece of the battery 200 to be tested. And recording test data such as vacuum degree, temperature, humidity, charge-discharge voltage and the like in the gas production test process.

It should be noted that, in the above step S460, the pressure release valve 1820 is opened to restore the air pressure in the sealing box 110 to normal pressure, so that the sealing box 110 is easy to open, otherwise, the sealing box 110 is not easy to open under the action of the air pressure difference in the negative pressure state in the sealing box 110.

Referring again to fig. 2, as shown in fig. 2, a test apparatus 100 provided in an embodiment of the present utility model may include: the device comprises a sealed box 110, a pressure monitoring device 120, a vacuum pump 130, a temperature measuring device 140, a humidity monitoring device 150, a temperature control device 160 and a charging and discharging device 170, wherein the sealed box 110 is internally used for accommodating a battery 200 to be tested, the pressure monitoring device 120, the temperature measuring device 140, the humidity monitoring device 150, the temperature control device 160 and the charging and discharging device 170 are all arranged inside the sealed box 110 and are all used for monitoring or controlling the state inside the sealed box 110, and the vacuum pump 130 is arranged outside the sealed box 110 and is used for exhausting air from the sealed box 110, so that the inside of the sealed box 110 is in a negative pressure state, and the exhaust of the battery 200 to be tested is facilitated. In addition, a first gas pipe 181 and a second gas pipe 182 are respectively disposed at two sides of the sealing box 110, the first gas pipe 181 connects the vacuum pump 130 with the sealing box 110, the second gas pipe 182 connects the internal and external environments of the sealing box 110, and valves are disposed on both gas pipes, the left valve may be referred to as a vacuum valve 1810, and the right valve may be referred to as a pressure release valve 1820.

While the utility model has been described with reference to the above-selected embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (13)

1. A testing device, characterized in that the testing device (100) is used for performing a gassing test on a battery (200) to be tested, the testing device (100) comprising:

-a sealed box (110), the interior of the sealed box (110) being adapted to house the battery (200) to be tested;

the pressure monitoring device (120) is arranged inside the sealing box (110) and is used for monitoring the pressure in the sealing box (110);

and the vacuum pump (130) is arranged outside the sealing box (110) and is in sealing connection with the sealing box (110) and is used for pumping the inside of the sealing box (110) into a negative pressure state.

2. The test device according to claim 1, wherein the test device (100) further comprises: and a temperature measuring device (140) which is arranged inside the sealing box (110) and is used for measuring the temperature in the sealing box (110).

3. The test device according to claim 1, wherein the test device (100) further comprises: the humidity monitoring device (150) is arranged inside the sealing box (110) and is used for monitoring the humidity in the sealing box (110).

4. The test device according to claim 1, wherein the test device (100) further comprises: and a temperature control device (160) which is arranged inside the sealing box (110) and is used for controlling the temperature in the sealing box (110).

5. The test device according to claim 4, wherein the temperature control device (160) comprises a resistance wire (161) and a fan (162), the fan (162) being adapted to spread heat generated by the resistance wire (161) inside the sealing box (110).

6. The test device according to claim 1, wherein the test device (100) further comprises: and the charging and discharging device (170) is arranged inside the sealing box (110) and is used for charging and/or discharging the battery (200) to be tested.

7. The test device according to claim 6, wherein the charge-discharge means (170) comprises a pole (171) of a charge-discharge apparatus and a charge-discharge control means (172), the charge-discharge control means (172) being adapted to control the movement of the pole (171) of the charge-discharge apparatus.

8. The test device according to any one of claims 1-7, wherein the sealing box (110) comprises an observation window (111) for observing conditions inside the sealing box (110).

9. The test device according to any one of claims 1-7, wherein the test device (100) is configured to test a gas discharged through a one-way valve (210) of the battery (200) to be tested, the one-way valve (210) being arranged in a liquid filling hole of the battery (200) to be tested.

10. The test device according to any one of claims 1-7, wherein the test device (100) further comprises: -a first gas line (181) for gas transfer between the vacuum pump (130) and the seal box (110).

11. The test device according to claim 10, wherein the test device (100) further comprises: a second gas line (182) for gas transfer between the interior and the exterior of the seal box (110).

12. The test device according to claim 11, wherein the first gas line (181) and/or the second gas line (182) comprises at least one of a PVC pipe, a PE pipe, a teflon pipe and a silicone pipe.

13. The test device according to any one of claims 1-7, wherein the test device (100) further comprises: and a data line (190) for data transmission between the seal box (110) and a computer.