Pressure relief test method, system, storage medium, and electronic device

Abstract

The application discloses a pressure relief test method, which comprises the following steps: determining real-time pressure values of a to-be-tested object in different directions; determining whether the real-time pressure values increase rapidly; in the case that the real-time pressure values are determined to increase rapidly, determining that the to-be-tested object has pressure relief at least, and determining a pressure relief direction of the to-be-tested object according to the real-time pressure values in the different directions. The application further discloses a pressure relief test system, a machine readable storage medium and an electronic device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pressure relief testing, in particular to a pressure relief testing method, system, storage medium and electronic device. BACKGROUND

[0002] At present, various electronic products develop towards wireless and portable, and batteries are widely used as the best power supply. As a kind of energy storage device, under normal storage and use conditions, the slow release of electric energy can continuously provide working energy for electronic products.

[0003] However, under the conditions of overcharge, overdischarge, high temperature use, external short circuit, mechanical abuse, aging, etc., the battery is prone to heat accumulation inside, which leads to an increase in internal pressure. When the pressure exceeds the shell tolerance value, pressure relief occurs, which can cause fire, explosion and other hazards.

[0004] Electronic products using batteries (such as lithium ion batteries), especially electronic products with air passage (such as electronic cigarettes), need to consider the direction of battery pressure relief (such as avoiding the mouth end, handheld end, etc.), so as to effectively avoid or reduce personal injury and property loss caused by battery relief.

[0005] At present, there is no comprehensive pressure relief safety testing method and system for batteries and electronic products using batteries. SUMMARY

[0006] In a first aspect, embodiments of the present application provide a pressure relief testing method, comprising:

[0007] determining real-time pressure values of the measured object in different directions;

[0008] determining whether the real-time pressure values increase rapidly;

[0009] In the case of determining that the real-time pressure values increase rapidly, at least determining that the measured object has pressure relief, and determining the pressure relief direction of the measured object according to the real-time pressure values in different directions.

[0010] In some embodiments, in the case of determining that the real-time pressure values increase rapidly, at least determining that the measured object has pressure relief, and determining the pressure relief direction of the measured object according to the real-time pressure values in different directions, comprising:

[0011] determining that the measured object has pressure relief, and determining the pressure relief direction of the measured object according to the real-time pressure values in different directions, and

[0012] recording the thermal distribution data and / or image data of the measured object corresponding to the pressure relief of the measured object, and / or outputting an alarm signal.

[0013] In some embodiments, before the step of determining the real-time pressure value of the measured object in different directions, the method comprises:

[0014] determining whether the discharge protection circuit of the measured object is removed;

[0015] In the case where it is determined that the discharge protection circuit of the measured object is removed, determining whether the charge protection circuit of the measured object is removed;

[0016] In the case where it is determined that the charge protection circuit of the measured object is removed, pre-charging the measured object to make the measured object in a full-charge state.

[0017] In some embodiments, after the step of pre-charging the measured object to make the measured object in a full-charge state in the case where it is determined that the charge protection circuit of the measured object is removed, the method comprises:

[0018] supplying power to the measured object under a preset ambient temperature and a preset ambient humidity.

[0019] In some embodiments, after the step of supplying power to the measured object under a preset ambient temperature and a preset ambient humidity, the method comprises:

[0020] determining a real-time current value of a power supply loop in which the measured object is located;

[0021] determining whether the real-time current value is greater than a preset current value;

[0022] In the case where it is determined that the real-time current value is greater than the preset current value, determining whether the real-time current value increases rapidly;

[0023] In the case where it is determined that the real-time current value increases rapidly, at least determining whether the power supply loop is in an open circuit state;

[0024] In the case where it is determined that the power supply loop is in the open circuit state, determining that the measured object is in a pressure relief or the measured object is damaged, and outputting an alarm signal.

[0025] In some embodiments, after the step of outputting the alarm signal, the method comprises ending the pressure relief test.

[0026] In some embodiments, in the case where it is determined that the real-time current value increases rapidly, at least determining whether the power supply loop is in an open circuit state, the method comprises:

[0027] determining whether the power supply loop is in an open circuit state, and

[0028] recording thermal distribution data and / or image data of the measured object corresponding to the real-time current value of the power supply loop increasing rapidly.

[0029] In some embodiments, after the step of powering the measured object under the preset ambient temperature and the preset ambient humidity, the method comprises:

[0030] determining the real-time voltage value of the measured object;

[0031] determining whether the real-time voltage value is greater than the preset voltage value;

[0032] in the case where the real-time voltage value is greater than the preset voltage value, ending the pressure relief test.

[0033] In some embodiments, after the step of powering the measured object under the preset ambient temperature and the preset ambient humidity, the method comprises:

[0034] determining the real-time temperature value at different positions of the measured object;

[0035] determining whether the real-time temperature value exceeds the preset temperature value;

[0036] in the case where the real-time temperature value exceeds the preset temperature value, aborting the pressure relief test.

[0037] In some embodiments, after the step of powering the measured object under the preset ambient temperature and the preset ambient humidity, the method comprises:

[0038] recording the initial thermal distribution data of the measured object.

[0039] In some embodiments, the method comprises:

[0040] after the pressure relief test is ended, in the case where the measured object has a pressure relief, filtering, exhausting and / or cleaning the pressure relief test system, and generating a pressure relief test report.

[0041] In some embodiments, the measured object comprises a battery or an electronic device containing a battery.

[0042] In a second aspect, embodiments of the present application provide a pressure relief test system for performing a pressure relief test on a measured object for an electronic device, comprising:

[0043] a pressure data acquisition device configured to receive a first control signal sent from the processor and send the acquired real-time pressure data of the measured object in different directions to the processor, wherein the first control signal is configured to control the pressure data acquisition device to acquire the real-time pressure data of the measured object in different directions;

[0044] The processor is configured to send the first control signal, receive real-time pressure data in different directions sent from the pressure data acquisition device, determine whether the real-time pressure data increases rapidly, and determine that the measured object is at least in a pressure relief state when it is determined that the real-time pressure data increases rapidly, and determine a pressure relief direction of the measured object according to the real-time pressure data in different directions.

[0045] In some embodiments, the following one or more units are included:

[0046] (1) a direct current electronic load configured to form a discharge circuit with the measured object and receive a second control signal sent from the processor, wherein the second control signal is configured to control an operating parameter of the direct current electronic load,

[0047] The processor is configured to send the second control signal and determine whether a discharge protection circuit of the measured object is removed according to the measured data and the operating parameter.

[0048] (2) a programmable direct current power supply configured to form a power supply circuit with the measured object and receive a third control signal, a fourth control signal and / or a fifth control signal sent from the processor, wherein the third control signal is configured to control an operating parameter of the programmable direct current power supply; the fourth control signal is configured to control the programmable direct current power supply to pre-charge the measured object at a preset maximum rated charging voltage so that the measured object is in a full charge state; and the fifth control signal is configured to control a power supply parameter of the programmable direct current power supply,

[0049] The processor is configured to send the third control signal and determine whether a charging protection circuit of the measured object is removed according to the measured data and the operating parameter; and / or send the fourth control signal when it is determined that the charging protection circuit is removed; and / or send the fifth control signal when the measured object is pre-charged to the full charge state.

[0050] (3) a power analysis device configured to be connected between the programmable direct current power supply and the measured object and receive a sixth control signal sent from the processor, wherein the sixth control signal is configured to control the power analysis device to collect the measured data;

[0051] (4) a temperature data acquisition device configured to receive a seventh control signal sent from the processor, wherein the seventh control signal is configured to control the temperature data acquisition device to collect position temperature data and / or environmental temperature data at different positions of the measured object;

[0052] (5) a camera configured to receive an eighth control signal sent from the processor, wherein the eighth control signal is configured to control the camera to record image data of the measured object.

[0053] (6) the infrared thermal imaging device is configured to receive the ninth control signal sent by the processor, wherein the ninth control signal is configured to control the infrared thermal imaging device to record the surface temperature change and / or the surface temperature distribution of the measured object;

[0054] (7) the temperature and humidity environment device is configured to receive the tenth control signal sent by the processor, wherein the tenth control signal is configured to control the environment temperature and the environment humidity of the temperature and humidity environment device;

[0055] (8) the alarm device is configured to receive the eleventh control signal sent by the processor, wherein the eleventh control signal is configured to control the alarm device to output the alarm signal;

[0056] (9) the filtered exhaust device is configured to receive the twelfth control signal sent by the processor, wherein the twelfth control signal is configured to control the filtered exhaust device to filter and exhaust the pressure relief test system;

[0057] (10) the cleaning device is configured to receive the thirteenth control signal sent by the processor, wherein the thirteenth control signal is configured to control the cleaning device to clean the residue of the measured object.

[0058] In some embodiments, the measured object includes a battery or an electronic device containing a battery.

[0059] In a third aspect, an embodiment of the present application provides a machine readable storage medium, the machine readable storage medium storing program codes, the program codes causing a machine to execute the pressure relief test method according to any one of the first aspect when the program codes are executed on the machine.

[0060] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a storage medium, wherein the storage medium is coupled to the processor, and the storage medium is configured to store program codes, and the processor is configured to read the program codes from the storage medium, so that the electronic device executes the pressure relief test method according to any one of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 FIG. 1 shows a schematic diagram of a pressure relief test system according to some embodiments of the present application;

[0062] Figure 2 FIG. 2 shows a flowchart of a pressure relief test method according to some embodiments of the present application;

[0063] Figure 3 FIG. 3 shows a flowchart of the method in FIG. 1C1. Figure 2 DETAILED DESCRIPTION

[0064] ​The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0065] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0066] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0067] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0068] Figure 1 A schematic diagram of a pressure relief testing system provided according to some embodiments of this application is shown. For example... Figure 1 As shown, the pressure relief test system 100 includes a pressure data acquisition device 105 and a processor 114. It should be noted that the test object of this pressure relief test system 100 can be a battery (the battery described in this invention can be a single battery or a battery pack), or an electronic product or electronic device that uses or contains a battery (e.g., an aerosol generating device, which can be an electronic cigarette or a heated cigarette device, etc.), and is not specifically limited here. Preferably, the test object can be a rechargeable battery, such as a lithium-ion battery or a sodium-ion battery.

[0069] The pressure data acquisition device 105 (for example, a pressure data acquisition instrument) is configured to receive the first control signal sent by the processor 114 and send the real-time pressure values of the measured object in different directions collected by the pressure data acquisition device 105 to the processor 114 (for example, the real-time pressure values collected by the pressure data acquisition device 105 can be sent to the processor 114 by arranging pressure sensors around the measured object, especially in the air passage or heat dissipation passage). The first control signal is configured to control the pressure data acquisition device 105 to collect the real-time pressure values of the measured object in different directions. In some embodiments, the collection frequency of the pressure data acquisition device 105 is not less than 1 Hz.

[0070] The processor 114 (for example, an industrial control device) is configured to send the first control signal and receive the real-time pressure values in different directions sent by the pressure data acquisition device 105; determine whether the real-time pressure values increase rapidly; and in the case that the real-time pressure values increase rapidly, determine that the measured object leaks at least, and determine the direction of the measured object leaking according to the real-time pressure values in different directions.

[0071] For example, pressure sensors are arranged around the measured object (for example, front, back, left, and right). When there is no leakage, the pressure of each pressure sensor is close to zero; when there is a leakage, the pressure sensor senses the release pressure (for example, 10-50 bar), that is, the real-time pressure value increases rapidly from zero to 10-50 bar, and then the direction corresponding to the maximum real-time pressure value is determined as the leakage direction of the measured object according to the real-time pressure values in different directions.

[0072] According to the pressure leakage test system 100 provided by the present application, based on the collected real-time pressure values of the measured object in different directions, the direction of the measured object leaking is determined in the case that the measured object leaks, so that the structural weak point of the battery or the electronic product containing (using) the battery can be analyzed, and the personal injury and property loss caused by the battery leakage can be avoided or reduced. In other words, the pressure leakage test system 100 of the present application can analyze the structural weak point of the battery by testing the battery, which provides a basis for the design of the shell structure of the electronic product using the battery; in addition, the pressure leakage test system 100 of the present application can test the electronic product using the battery, and detect whether the shell structure design of the electronic product conforms to the safe leakage direction, for example, whether the leakage direction of the electronic cigarette avoids the leakage direction of the mouth end, the hand-held end, and other directions that are easy to cause personal injury.

[0073] In some embodiments, the pressure relief test system 100 can further comprise a direct current electronic load 101. It is configured to form a discharge circuit with the object under test (e.g. connect the input of the direct current electronic load 101 with the positive and negative leads or power interface of the battery to form a discharge circuit, and configure the corresponding connection terminal or interface according to the lead condition or interface type, such as USB, TYPE-C, MICRO-USB, etc.), and receive the second control signal sent by the processor 114. The second control signal is configured to control the working parameters of the direct current electronic load 101, including the working current (e.g. the current setting range is 0-80A), the working voltage (e.g. the voltage setting range is 1-150V), and / or the working power (e.g. the maximum output power is 400W).

[0074] The processor 114 is configured to send the second control signal, and determine whether the discharge protection circuit of the object under test is removed according to the measured data and the working parameters. For example, the measured data includes the measured current, the measured voltage, and / or the measured power. By comparing the measured current, the measured voltage, and / or the measured power with the working current, the working voltage, and / or the working power, it can be determined whether the discharge protection circuit of the object under test is removed.

[0075] In the case where it is determined that the discharge protection circuit of the object under test is removed, the pressure relief test is continued, for example, the following step of determining whether the charging protection circuit is removed.

[0076] In the case where it is determined that the discharge protection circuit of the object under test is not removed, the pressure relief test is terminated. For example, the operator can be prompted that the pressure relief test has been terminated through a prompt on the display interface, etc.

[0077] In some embodiments, the pressure relief test system 100 can further comprise a programmable direct current power supply 102. It is configured to form a power supply circuit with the object under test, and receive the third control signal sent by the processor 114. The third control signal is configured to control the working parameters of the programmable direct current power supply 102, including the working current (e.g. the current setting range is 0-80A), the working voltage (e.g. the voltage setting range is 0-40V), and / or the working power (e.g. the maximum output power is 800W).

[0078] The processor 114 is configured to send the third control signal, and determine whether the charging protection circuit of the object under test is removed according to the measured data and the working parameters. For example, the measured data includes the measured current, the measured voltage, and / or the measured power. By comparing the measured current, the measured voltage, and / or the measured power with the working current, the working voltage, and / or the working power, it can be determined whether the charging protection circuit of the object under test is removed.

[0079] In the case that the charging protection circuit of the object under test is removed, the pressure relief test is continued, for example, the processor 114 sends a fourth control signal to the programmable DC power supply 102. The fourth control signal is configured to control the programmable DC power supply 102 to pre-charge the object under test at a preset maximum rated charging voltage (for example, at the maximum rated charging voltage specified in the battery specification book) so that the object under test is in a full charge state. In other words, after receiving the fourth control signal sent by the processor 114, the programmable DC power supply 102 pre-charges the object under test at a preset maximum rated charging voltage so that the object under test is in a full charge state, thereby ensuring that the object under test is in the same state of charge, ensuring the comparability of the pressure relief test results.

[0080] After the object under test is pre-charged to a full charge state, the processor 114 sends a fifth control signal to the programmable DC power supply 102. The fifth control signal is configured to control the power supply parameters of the programmable DC power supply 102, including the power supply current (for example, the current setting range is 0-80A), the power supply voltage (for example, the voltage setting range is 0-40V) and / or the power supply power (for example, the maximum output power is 800W). In other words, after receiving the fifth control signal sent by the processor 114, the programmable DC power supply 102 supplies power to the object under test at the preset power supply parameters.

[0081] The programmable DC power supply 102 is also configured with a communication interface such as LAN, USB or RS232, so that the output parameters (for example, operating parameters, power supply parameters) can be precisely controlled by editing a timing program.

[0082] In some embodiments, the pressure relief test system 100 can further include a power analysis device 103 (for example, a power analyzer). It is configured to be connected between the programmable DC power supply 102 and the object under test, and to receive a sixth control signal sent by the processor 114. The sixth control signal is configured to control the power analysis device 103 to collect measured data (for example, measured data when it is determined that the discharge protection circuit / charging protection circuit of the object under test is removed, and / or measured data when the programmable DC power supply 102 supplies power to the object under test). The measured data includes measured current, measured voltage and / or measured power. By measuring the data through the power analysis device 103, the influence of the system circuit on the measurement results can be reduced, thereby improving the accuracy of the measured data.

[0083] It should be noted that the DC electronic load 101 and the programmable DC power supply 102 can also measure data (for example, current, voltage and / or power), and in other embodiments, the measured data can be measured by the DC electronic load 101 and the programmable DC power supply 102 themselves instead of the power analysis device 103.

[0084] The power analysis device 103 is further configured to send the collected measured data to the processor 114. For example, the power analysis device 103 can send and receive data / signals to the processor 114 through a communication interface such as LAN, USB, or RS232.

[0085] The power analysis device 103 can be further configured to determine the change of charging energy during the power supply of the programmable DC power supply 102 to the measured object by an integration function.

[0086] In some embodiments, the pressure relief test system 100 can further include a temperature data collection device 104 (e.g., a temperature data collection instrument). The temperature data collection device 104 is configured to receive a seventh control signal sent by the processor 114. The seventh control signal is configured to control the temperature data collection device 104 to collect position temperature data and / or environmental temperature data at different positions on the surface of the measured object.

[0087] The collection frequency of the temperature data collection device 104 is greater than 1 Hz.

[0088] The temperature measurement can use a K-type thermocouple with a temperature measurement range of 0-480°C. The insulation material can use a glass filament woven layer, which can withstand the surface temperature when the measured object is pressure relieved. By placing the thermocouple in the test environment, on the one hand, the stability of the test environment can be monitored, and on the other hand, the influence of the measured object when pressure relieved on the surrounding environment can be monitored.

[0089] Specifically, the thermocouple is pasted on the surface of the measured object using high-temperature resistant glue or high-temperature resistant tape, and the change of the temperature of the surface of the measured object during the test is continuously recorded, which is beneficial to further analyze the pressure relief safety characteristics of the measured object.

[0090] In some embodiments, the pressure relief test system 100 can further include a camera 106 (e.g., a high-definition camera). The camera 106 is configured to receive an eighth control signal sent by the processor 114. The eighth control signal is configured to control the camera 106 to record image data of the measured object.

[0091] When the measured object is pressure relieved, a large amount of smoke or sparks is ejected from the inside of the measured object through the air passage, the heat dissipation passage, or the molten part. The camera 106 can directly record the pressure relief phenomenon. For example, the image capturing function can be triggered at the same time when the pressure sensor senses the pressure release, and a number of phenomenon pictures or videos when the pressure relief occurs are generated, which is convenient for directly determining the pressure relief direction.

[0092] Specifically, the resolution of the camera 106 can be 1920*1080, the frame rate per second is greater than 20 frames, and the slow motion function is greater than or equal to one-eighth speed. The audio and video signals (including sound signals and image signals) can be recorded in real time.

[0093] In some embodiments, the pressure relief test system 100 can further include an infrared thermal imaging device 107 (for example, an infrared thermal imager). It is configured to receive the ninth control signal sent by the processor 114. The ninth control signal is configured to control the infrared thermal imaging device 107 to record the surface temperature change / surface temperature distribution of the measured object.

[0094] Specifically, the temperature range of the infrared thermal imager can be 0-1000℃, the accuracy can be 2%, and the resolution of the detector can be 640*480 or higher.

[0095] In some embodiments, the pressure relief test system 100 can further include a temperature and humidity environment device 113 (for example, a temperature and humidity environment box). It is configured to receive the tenth control signal sent by the processor 114. The tenth control signal is configured to control the temperature and humidity of the temperature and humidity environment device 113. By controlling the temperature and humidity of the test environment, the pressure relief test under different temperature and humidity environments can be realized.

[0096] Specifically, the temperature and humidity environment device 113 is mainly made of stainless steel plate to withstand the impact force generated when the measured object is subjected to pressure relief. The temperature range of the temperature and humidity environment device 113 can be-40℃-180℃, and the humidity range can be 10-98%.

[0097] In some embodiments, the pressure relief test system 100 can further include an alarm device 108. It is configured to receive the eleventh control signal sent by the processor 114. The eleventh control signal is configured to control the alarm device 108 to output an alarm signal, and the alarm signal includes an acoustic signal and / or an optical signal. Thus, the operator can be reminded of different situations such as the occurrence of pressure relief, the termination of pressure relief test, etc.

[0098] In some embodiments, the pressure relief test system 100 can further include a filtering and exhaust device 109. It is configured to receive the twelfth control signal sent by the processor 114. The twelfth control signal is configured to control the filtering and exhaust device 109 to filter and exhaust the pressure relief test device.

[0099] Specifically, after the measured object is subjected to pressure relief, a large amount of smoke and dust will be generated. By installing an exhaust fan on the wall of the temperature and humidity environment device 113, and adding a filter screen and a filter core at the inlet of the exhaust duct, the dust and impurities can be filtered and treated, and the smoke in the temperature and humidity environment device 113 can be discharged.

[0100] In some embodiments, the pressure relief test system 100 can further comprise a cleaning device 110. The cleaning device 110 is configured to receive a thirteenth control signal sent by the processor 114. The thirteenth control signal is configured to control the cleaning device 110 to clean the residue of the measured object.

[0101] Specifically, the cleaning device 110 is arranged at the bottom of the temperature and humidity environment device 113, and is mainly used to clean the residue of the measured object after the pressure relief test out of the temperature and humidity environment device 113 and collect the residue by the fixed container. The cleaning device 110 can be similar to the structure of a windshield wiper, and the cleaning surface is made of fire-retardant silica gel.

[0102] In some embodiments, the pressure relief test system 100 can further comprise a fixing device 111. The fixing device 111 is configured to fix the measured battery / electronic product using the battery. The fixing device 111 can be controlled by the processor 114 to clamp and fix the measured battery / electronic product using the battery, or can be fixed manually, which is not specifically limited here.

[0103] Specifically, the fixing device 111 can be used to clamp and fix the measured battery / electronic product using the battery in a multi-component combination manner. The contact area of the clamping component with the measured battery / electronic product using the battery is small, and the contact material is made of elastic fire-retardant material (such as silica gel), so as to reduce the influence of the fixing device 111 on the heat dissipation of the pressure relief test.

[0104] The wiring port is close to the fixing device 111, so as to facilitate the power supply for the measured battery / electronic product using the battery.

[0105] In some embodiments, the pressure relief test system 100 can further comprise an illumination observation device 112. The illumination observation device 112 is configured to observe the state of the measured battery / electronic product using the battery in the temperature and humidity environment device 113. The illumination observation device 112 comprises an observation window and an illumination device. The observation window can be made of organic glass or explosion-proof glass, and the illumination device can be installed at the top of the observation window or the top of the temperature and humidity environment device 113. The lampshade of the illumination device is made of explosion-proof glass or organic glass, and plays a role of illumination.

[0106] Figure 2 A flowchart of a pressure relief test method according to some embodiments of the present application is shown. Figure 3 A flowchart of the pressure relief test method is shown. Figure 2 The flowchart of C1 is shown. The following refers to the flowchart of C1. Figure 2 And Figure 3 and in combination with Figure 1 The pressure relief test method is specifically described by taking the measured object as a lithium ion battery / electronic product using a lithium ion battery as an example. It should be noted that the pressure relief test method can also be applied to a sodium ion battery / electronic product using a sodium ion battery.

[0107] Step S201, fix the lithium ion battery / electronic product using lithium ion battery.

[0108] For example, the fixing device 111 can be controlled by the processor 114 (for example, sending a control signal to the fixing device 111) to clamp and fix the measured lithium ion battery / electronic product using lithium ion battery, or the fixing can be performed manually, which is not specifically limited here.

[0109] Step S202, determine whether the discharge protection circuit is removed.

[0110] For example, the DC electronic load 101 and the lithium ion electronic constitute a discharge circuit, and the processor 114 sends a second control signal to the DC electronic load 101. The second control signal is configured to control the working parameters of the DC electronic load 101, including working current (for example, the current setting range is 0-80A), working voltage (for example, the voltage setting range is 1-150V) and / or working power (for example, the maximum output power is 400W).

[0111] The processor 114 determines whether the discharge protection circuit of the measured object is removed according to the measured data and the working parameters. Specifically, the measured data includes measured current, measured voltage and / or measured power. By comparing the measured current, measured voltage and / or measured power with the working current, working voltage and / or working power, it can be determined whether the discharge protection circuit of the measured object is removed.

[0112] It should be noted that the measured data can be determined by the power analysis device 103, or can be determined by the measurement function of the DC electronic load 101 itself. In this embodiment, the measured data can be determined by the power analysis device 103, which can reduce the influence of the system circuit on the measurement result, thereby improving the accuracy of the measured data.

[0113] In the case where it is determined that the discharge protection circuit of the measured object is not removed, step 215 is performed to stop the pressure relief test.

[0114] In the case where it is determined that the discharge protection circuit of the measured object is removed, step 203 is performed.

[0115] Step 203, determine whether the charge protection circuit is removed.

[0116] For example, the programmable DC power supply 102 and the object under test form a power supply loop, and the processor 114 sends a third control signal to the programmable DC power supply 102. The third control signal is configured to control the working parameters of the programmable DC power supply 102, and the working parameters include working current (for example, the current setting range is 0-80A), working voltage (for example, the voltage setting range is 0-40V), and / or working power (for example, the maximum output power is 800W).

[0117] The processor 114 determines whether the charging protection circuit of the object under test is removed according to the measured data and the working parameters. For example, the measured data includes measured current, measured voltage, and / or measured power, and by comparing the measured current, measured voltage, and / or measured power with the working current, working voltage, and / or working power, it can be determined whether the charging protection circuit of the object under test is removed.

[0118] It should be noted that the measured data can be determined by the power analysis device 103 or by the measurement function of the DC electronic load 101 itself. In this embodiment, the measured data can be determined by the power analysis device 103, which can reduce the influence of the system circuit on the measurement result, thereby improving the accuracy of the measured data.

[0119] In the case where it is determined that the charging protection circuit of the object under test is not removed, step S215 is performed to terminate the pressure relief test.

[0120] In the case where it is determined that the charging protection circuit of the object under test is removed, step S204 is performed.

[0121] In step S204, the object under test is pre-charged to a full charge state.

[0122] For example, the processor 114 sends a fourth control signal to the programmable DC power supply 102. The fourth control signal is configured to control the programmable DC power supply 102 to pre-charge the object under test (i.e., the lithium ion battery) at a preset maximum rated charging voltage (for example, at the maximum rated charging voltage specified in the lithium ion battery specification book) to make the object under test in a full charge state. In other words, after receiving the fourth control signal sent by the processor 114, the programmable DC power supply 102 pre-charges the object under test at a preset maximum rated charging voltage to make the object under test in a full charge state, thereby ensuring that the object under test is in the same amount of electricity, ensuring the comparability of the pressure relief test results.

[0123] In step S205, the object under test is powered under a preset ambient temperature and a preset ambient humidity.

[0124] For example, after the lithium ion object reaches the full state of charge, the processor 114 can send a tenth control signal to the temperature and humidity environment device 113. The tenth control signal is configured to control the environmental temperature and humidity of the temperature and humidity environment device 113. By controlling the temperature and humidity of the test environment, the pressure relief test under different temperature and humidity environments can be realized.

[0125] When the temperature and humidity environment device 113 reaches the preset environmental temperature and preset environmental humidity, the processor 114 can send a fifth control signal to the programmable DC power supply 102. The fifth control signal is configured to control the power supply parameters of the programmable DC power supply 102, including the power supply current (for example, the current setting range is 0-80A), the power supply voltage (for example, the voltage setting range is 0-40V) and / or the power supply power (for example, the maximum output power is 800W). In other words, the programmable DC power supply 102 powers the object to be tested with the predetermined power supply parameters after receiving the fifth control signal sent by the processor 114.

[0126] Step S206, determine the real-time voltage value, real-time current value, real-time temperature value, real-time pressure value and initial thermal distribution data.

[0127] The real-time voltage value, real-time current value, real-time temperature value, real-time pressure value and initial thermal distribution data can be determined by the power analysis device 103, temperature data acquisition device 104, pressure data acquisition device 105 and infrared thermal imaging device 107 respectively. For specific description of each device, please refer to the description in the foregoing Figure 1

[0128] Step S207, determine whether the real-time voltage value is greater than the preset voltage value.

[0129] In the case where it is determined that the real-time voltage value is not greater than the preset voltage value, the determination of the real-time voltage value in step S206 is repeated.

[0130] In the case where it is determined that the real-time voltage value is greater than the preset voltage value, step S208 is performed, and C1 is ended.

[0131] Step S209, determine whether the real-time current value is greater than the preset current value.

[0132] In the case where it is determined that the real-time current value is not greater than the preset current value, the determination of the real-time current value in step S206 is repeated.

[0133] In the case where it is determined that the real-time current value is greater than the preset current value, step S210 is performed.

[0134] Step S210, determine whether the real-time current value increases rapidly.

[0135] ​In some embodiments, the rate of change of the current value is 5-15 A / s.

[0136] In the case where it is determined that the real-time current value does not increase rapidly, the determination of the real-time current value in step S206 is repeated.

[0137] In the case where it is determined that the real-time current value increases rapidly, steps S211 and S213 are performed.

[0138] In step S211, it is determined whether the power supply circuit is broken.

[0139] In the case where it is determined that the power supply circuit is not broken, step S208 is performed, and the process C1 is ended.

[0140] In the case where it is determined that the power supply circuit is broken, step S212 is performed.

[0141] In step S212, an alarm signal is output, and the process C1 is ended.

[0142] For example, the processor 114 can send an eleventh control signal to the alarm device 108. The eleventh control signal is configured to control the alarm device 108 to output an alarm signal, and the alarm signal includes an acoustic signal and / or a light signal. In other words, after receiving the eleventh control signal sent by the processor 114, the alarm device 108 outputs an alarm signal, so as to remind the operator that the pressure relief phenomenon has occurred.

[0143] In step S213, thermal distribution data and / or image data are recorded.

[0144] For example, the processor 114 sends a ninth control signal to the infrared thermal imaging device 107. The ninth control signal is configured to control the infrared thermal imaging device 107 to record the surface temperature change / surface temperature distribution of the measured object, and / or the processor 114 sends an eighth control signal to the camera device 106. The eighth control signal is configured to control the image device to record the image data of the measured object. In other words, after receiving the ninth control signal sent by the processor 114, the infrared thermal imaging device 107 records the surface temperature change / surface temperature distribution of the measured object, and / or after receiving the eighth control signal sent by the processor 114, the camera device 106 records the image data of the measured object.

[0145] In step S214, it is determined whether the real-time temperature value is greater than a preset temperature value.

[0146] In the case where it is determined that the real-time temperature value is greater than the preset temperature value, step S215 is performed, and the pressure relief test is terminated.

[0147] In the case where it is determined that the real-time temperature value is not greater than the preset temperature value, the determination of the real-time temperature value in step S206 is repeated.

[0148] Step S216, determine whether the real-time pressure value increases rapidly.

[0149] In the case of determining that the real-time pressure value does not increase rapidly, repeat the determination of the real-time pressure value in step S206.

[0150] In the case of determining that the real-time pressure value increases rapidly, proceed to steps S217, S218 and S212.

[0151] It should be noted that steps S207, S209, S214 and S216 can be performed simultaneously or not simultaneously, which is not specifically limited here.

[0152] Step S217, determine that the measured object has a pressure release, and determine the pressure release direction according to the real-time pressure value in different directions. Thus, the structural weak point of the lithium ion battery / electronic product using the lithium ion battery can be analyzed to avoid or reduce personal injury and property loss caused by lithium ion battery release.

[0153] For example, pressure sensors are arranged around the measured object (e.g. front, back, left and right). When there is no pressure release, the pressure of each pressure sensor is nearly zero; when there is a pressure release, the pressure sensor senses the release pressure (e.g. 10-50 bar), i.e. the real-time pressure value rapidly increases from zero to 10-50 bar, and then according to the real-time pressure value in different directions, the direction corresponding to the maximum real-time pressure value is determined as the pressure release direction of the measured object.

[0154] In some embodiments, the time point at which each pressure sensor senses the release pressure can also be combined to finally confirm the pressure release direction of the measured object. In other words, the direction that simultaneously satisfies the maximum real-time pressure value and the earliest sensing of the release pressure is determined as the pressure release direction of the measured object.

[0155] Step S218, record the thermal distribution data and / or image data.

[0156] Step 212, output an alarm signal and end C1.

[0157] Step 219, determine whether C1 has a pressure release.

[0158] In the case of determining that C1 does not have a pressure release, proceed to step 221 to generate a pressure release test report.

[0159] In the case of determining that C1 has a pressure release, proceed to step 220.

[0160] Step 220, perform filtered exhaust and / or cleaning.

[0161] For example, the processor 114 sends a twelfth control signal to the filtering and exhausting device 109. The twelfth control signal is configured to control the filtering and exhausting device 109 to filter and exhaust the pressure relief test device. After the pressure relief of the measured object, a large amount of smoke and dust is generated. The exhaust fan is installed on the wall of the temperature and humidity environment device 113, and the filter screen and filter core are added at the inlet of the exhaust pipeline to filter and treat the dust and impurities, and the smoke in the temperature and humidity environment device 113 is exhausted.

[0162] The processor 114 sends a thirteenth control signal to the cleaning device 110. The thirteenth control signal is configured to control the cleaning device 110 to clean the residue of the measured object. The cleaning device 110 can be similar to a wiper structure, and the cleaning surface is made of fire-retardant silica gel, so that the residue of the measured object after the pressure relief test can be cleaned out of the temperature and humidity environment device 113.

[0163] In step 221, a pressure relief test report is generated.

[0164] According to the pressure relief test method provided by the application, based on the collected real-time pressure values of the measured object in different directions, the pressure relief direction of the measured object is determined when the measured object is determined to have pressure relief, so that the weak structure of the lithium ion battery or the electronic product containing (using) the lithium ion battery can be analyzed, and the personal injury and property loss caused by the lithium ion battery relief can be avoided or reduced.

[0165] Embodiments of the mechanisms disclosed herein can be implemented in hardware, software, firmware, or some combination of these implementation approaches.

[0166] In the drawings, some structural or methodological features can be shown in a particular arrangement and / or order. However, it should be understood that such a particular arrangement and / or order can not be required. Rather, in some embodiments, the features can be arranged in a different manner and / or order than shown in the illustrative figures. Additionally, inclusion of structural or methodological features in a particular figure does not imply that such features are required in all embodiments, and in some embodiments, these features can not be included or can be combined with other features.

[0167] It should be noted that each unit / module mentioned in each device embodiment of the present application is a logical unit / module, and in physical form, one logical unit / module can be a physical unit / module, or a part of a physical unit / module, or be realized in a combination of multiple physical unit / modules, and the physical realization of these logical units / modules is not the most important, and the combination of functions implemented by these logical units / modules is the key to solving the technical problems proposed in the present application. In addition, in order to highlight the innovative part of the present application, the above-mentioned device embodiments of the present application do not introduce units / modules that are not closely related to solving the technical problems proposed in the present application, which does not mean that the above-mentioned device embodiments do not have other units / modules.

[0168] It should be noted that in the examples and descriptions of the present patent, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0169] Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood that the above description is a further illustration of the present application in connection with the specific embodiments, and cannot be construed as limiting the specific implementation of the present application. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present application.

Claims

1. A pressure relief test method characterized by, The method comprises the following steps: determining whether the discharge protection circuit of the measured object is removed, wherein the measured object is a battery or an electronic device using or containing the battery, and the measured object is fixed in a temperature and humidity environment device capable of providing different temperature and humidity; determining whether the charge protection circuit of the measured object is removed in the case that the discharge protection circuit of the measured object is removed; pre-charging the measured object to make the measured object in a full charge state in the case that the charge protection circuit of the measured object is removed; powering the measured object under a preset environment temperature and a preset environment humidity; determining the real-time pressure value of the measured object in different directions; determining whether the real-time pressure value increases rapidly; determining that the measured object leaks at least in the case that the real-time pressure value increases rapidly, determining the leakage direction of the measured object according to the real-time pressure value in different directions, and recording the thermal distribution data and / or image data of the measured object corresponding to the leakage of the measured object.

2. The pressure relief test method of claim 1, wherein, The step of determining that the measured object leaks at least in the case that the real-time pressure value increases rapidly, determining the leakage direction of the measured object according to the real-time pressure value in different directions, and recording the thermal distribution data and / or image data of the measured object corresponding to the leakage of the measured object, comprises: outputting an alarm signal.

3. The pressure relief test method of claim 1, wherein, After the step of powering the measured object under a preset environment temperature and a preset environment humidity, comprising: determining the real-time current value of the power supply circuit in which the measured object is located; determining whether the real-time current value is greater than a preset current value; determining whether the real-time current value increases rapidly in the case that the real-time current value is greater than the preset current value; determining that the power supply circuit is at least in an open circuit state in the case that the real-time current value increases rapidly; determining that the measured object leaks or the measured object is damaged in the case that the power supply circuit is in the open circuit state, and outputting an alarm signal.

4. The pressure relief test method of claim 2 or 3, wherein, After the step of outputting an alarm signal, comprising:

5. The pressure relief test method of claim 3, wherein, ending the leakage test. The step of determining that the power supply circuit is at least in an open circuit state in the case that the real-time current value increases rapidly, comprises: determining whether the power supply circuit is in an open circuit state, and 6. The pressure relief test method of claim 1, wherein, recording the thermal distribution data and / or image data of the measured object corresponding to the rapid increase of the real-time current value of the power supply circuit. After the step of powering the measured object under a preset environment temperature and a preset environment humidity, comprising: determining the real-time voltage value of the measured object; determining whether the real-time voltage value is greater than a preset voltage value; 7. The pressure relief test method of claim 1, wherein, ending the leakage test in the case that the real-time voltage value is greater than the preset voltage value. After the step of powering the measured object under a preset environment temperature and a preset environment humidity, comprising: determining real-time temperature values of the measured object at different positions; determining whether the real-time temperature values exceed preset temperature values; in the case where it is determined that the real-time temperature values exceed the preset temperature values, stopping the pressure relief test.

8. The pressure relief test method of claim 1, wherein, The step of powering the measured object under preset environmental temperature and preset environmental humidity comprises: recording initial thermal distribution data of the measured object.

9. The pressure relief test method of any one of claims 3, 5-8, wherein, It comprises: After the pressure relief test is completed, in the case where the measured object is relieved of pressure, filtering, exhausting and / or cleaning the pressure relief test system, and generating a pressure relief test report.

10. A pressure relief test system characterized by, It comprises: a temperature and humidity environment device, in which the measured object is fixed, the temperature and humidity environment device can provide different temperature and humidity, the measured object is a battery or an electronic device using or containing the battery, and the measured object is used to pre-charge the measured object to make the measured object in a full charge state in the case where it is determined that the discharge protection circuit and the charge protection circuit of the measured object are removed; and then power the measured object under preset environmental temperature and preset environmental humidity; a pressure data acquisition device configured to receive a first control signal sent by the processor and send the real-time pressure data of the measured object in different directions collected by the pressure data acquisition device to the processor, wherein the first control signal is configured to control the pressure data acquisition device to collect the real-time pressure data of the measured object in different directions; a processor configured to send the first control signal and receive the real-time pressure data in different directions sent by the pressure data acquisition device, determine whether the real-time pressure data increases rapidly, and in the case where it is determined that the real-time pressure data increases rapidly, at least determine that the measured object is relieved of pressure, determine the pressure relief direction of the measured object according to the real-time pressure data in different directions, and record the thermal distribution data and / or image data of the measured object corresponding to the pressure relief of the measured object.

11. The pressure relief test system of claim 10, wherein, It comprises one or more of the following units: (1) a direct current electronic load configured to form a discharge circuit with the measured object and receive a second control signal sent by the processor, wherein the second control signal is configured to control the working parameters of the direct current electronic load, wherein the processor is configured to send the second control signal and determine whether the discharge protection circuit of the measured object is removed according to the measured data and the working parameters; (2) a programmable direct current power supply configured to form a power supply circuit with the measured object and receive a third control signal, a fourth control signal and / or a fifth control signal sent by the processor, wherein the third control signal is configured to control the working parameters of the programmable direct current power supply; the fourth control signal is configured to control the programmable direct current power supply to pre-charge the measured object at a preset maximum rated charging voltage to make the measured object in a full charge state; and the fifth control signal is configured to control the power supply parameters of the programmable direct current power supply, The processor is configured to send the third control signal, and determine whether the charging protection circuit of the measured object is removed according to the measured data and the working parameter; and / or, send the fourth control signal in the case that the charging protection circuit is removed; and / or, send the fifth control signal in the case that the measured object is pre-charged to the full power state; (3) a power analysis device configured to be connected between the programmable direct current power supply and the measured object, and receive the sixth control signal sent by the processor, wherein the sixth control signal is configured to control the power analysis device to collect the measured data; (4) a temperature data collection device configured to receive the seventh control signal sent by the processor, wherein the seventh control signal is configured to control the temperature data collection device to collect the position temperature data and / or the environmental temperature data at different positions of the surface of the measured object; (5) a camera device configured to receive the eighth control signal sent by the processor, wherein the eighth control signal is configured to control the camera device to record the image data of the measured object; (6) an infrared thermal imaging device configured to receive the ninth control signal sent by the processor, wherein the ninth control signal is configured to control the infrared thermal imaging device to record the surface temperature change and / or the surface temperature distribution of the measured object; (7) a temperature and humidity environment device configured to receive the tenth control signal sent by the processor, wherein the tenth control signal is configured to control the environmental temperature and the environmental humidity of the temperature and humidity environment device; (8) an alarm device configured to receive the eleventh control signal sent by the processor, wherein the eleventh control signal is configured to control the alarm device to output an alarm signal; (9) a filtering and air exhaust device configured to receive the twelfth control signal sent by the processor, wherein the twelfth control signal is configured to control the filtering and air exhaust device to filter and air exhaust the pressure relief test system; (10) a cleaning device configured to receive the thirteenth control signal sent by the processor, wherein the thirteenth control signal is configured to control the cleaning device to clean the residues of the measured object.

12. A machine-readable storage medium, characterized in that, The machine readable storage medium stores program codes, and the program codes make the machine execute the pressure relief test method according to any one of claims 1-9 when executed on the machine.

13. An electronic device, comprising: It comprises: a processor and a storage medium, wherein the storage medium is coupled with the processor, and the storage medium is used to store program codes, and the processor reads the program codes from the storage medium to make the electronic device execute the pressure relief test method according to any one of claims 1-9.

Images