Battery detection system

Abstract

The utility model discloses a battery detection system which comprises a switch part used for being connected with an external power supply, an acquisition device and a trigger device which are electrically connected with the switch part, and a controller which is electrically connected with the acquisition device and the switch part. The triggering device is used for connecting a battery to trigger the battery to generate thermal runaway, the acquisition device is used for acquiring performance parameters of the battery, and the controller is used for determining that the battery generates thermal runaway based on the performance parameters and controlling the switching element to be switched off. Therefore, the acquisition device can acquire the performance parameters of the battery in real time in the thermal runaway triggering process of the battery and send the performance parameters to the controller, and the controller determines that thermal runaway of the battery occurs according to the performance parameters and controls the switching element to be switched off, so that the triggering device stops working, and safety accidents of the battery are avoided. Meanwhile, when the triggering device stops working, the collecting device also stops working, so that the collecting device does not collect the performance parameters of the battery any more after the battery is subjected to thermal runaway, and the collected performance parameters are more accurate.

Description

Technical Field

[0001] This application belongs to the technical field of battery detection, and particularly relates to a battery detection system. Background Art

[0002] With the development of technology, battery products emerge in an endless stream. To ensure the quality of batteries, it is necessary to conduct safety tests on batteries before leaving the factory, especially overcharge heating tests on batteries to detect the performance parameters of batteries in a thermal runaway state.

[0003] In related technologies, during overcharge and heating tests of batteries, test equipment heats and charges the batteries to trigger a thermal runaway state of the batteries in order to collect data when the batteries experience thermal runaway. However, after the batteries experience thermal runaway, the test equipment in related technologies still continues to operate, resulting in inaccurate collected data and potential safety hazards. Summary of the Utility Model

[0004] This application aims to provide a battery detection system that can solve the problems of inaccurate data collection and potential safety hazards existing in the test equipment in related technologies.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of this application provides a battery detection system, including: a switch, a collection device, a trigger device, and a controller; the switch is used to connect to an external power supply, the collection device and the trigger device are respectively electrically connected to the switch, and the controller is respectively electrically connected to the collection device and the switch; the trigger device is used to connect to a battery to trigger the battery to experience thermal runaway, the collection device is used to collect the performance parameters of the battery, and the controller is used to determine that the battery has experienced thermal runaway based on the performance parameters and control the switch to disconnect.

[0007] Optionally, the battery detection system further includes a conversion device; the conversion device is electrically connected to the switch, and the collection device and the trigger device are respectively electrically connected to the conversion device; the conversion device is used to convert the alternating current provided by the external power supply into direct current to supply power to the collection device and the trigger device.

[0008] Optionally, the conversion device includes a conversion module and a power supply module; the conversion module is electrically connected to the switch, the power supply module is electrically connected to the conversion module, the trigger device and the collection device are respectively electrically connected to the power supply module, the conversion module is used to convert the alternating current provided by the external power supply into the direct current, and the power supply module is used to supply the direct current to the collection device and the trigger device.

[0009] Optionally, the triggering device includes a charging module, which is connected to the conversion device and is used to connect to the battery and charge the battery to trigger thermal runaway of the battery.

[0010] Optionally, the acquisition device includes a pressure measuring component; the pressure measuring component is electrically connected to the controller and is used to acquire the real-time voltage of the battery, and the controller is used to determine that the battery has experienced thermal runaway based on the real-time voltage and control the switch component to disconnect.

[0011] Optionally, the acquisition device further includes a voltage sampling wire; one end of the voltage sampling wire is connected to the pressure measuring component, and the other end of the voltage sampling wire is used to connect to the electrode of the battery.

[0012] Optionally, the triggering device includes a heating component; the heating component is connected to the conversion device and is used to connect to the battery and heat the battery to trigger thermal runaway of the battery.

[0013] Optionally, the acquisition device includes a temperature measuring component; the temperature measuring component is electrically connected to the controller and is used to be disposed on the outer surface of the battery to detect the real-time temperature of the battery, and the controller is used to determine that the battery has experienced thermal runaway based on the real-time temperature and control the switch component to disconnect.

[0014] Optionally, the heating component includes a heating tape; the heating tape is used to be disposed on the outer surface of the battery to heat the battery.

[0015] Optionally, the controller includes a data processing module, a state judgment module, and a switch component control module; the data processing module is electrically connected to the acquisition device and is used to determine the parameter change rate based on the performance parameters acquired by the acquisition device; the state judgment module is electrically connected to the data processing module and is used to judge whether the battery has experienced thermal runaway based on the parameter change rate; the switch component control module is electrically connected to the state judgment module and the switch component and is used to control the switch component to disconnect when the state judgment module determines that the battery has experienced thermal runaway.

[0016] In an embodiment of the present application, by connecting a switch to an external power supply, a collection device and a triggering device are electrically connected to the switch respectively, and a controller is electrically connected to the collection device and the switch respectively; the triggering device is connected to a battery to trigger thermal runaway of the battery. In this way, during the process of triggering thermal runaway of the battery, the collection device can collect the performance parameters of the battery in real time and send the performance parameters to the controller. The controller determines that the battery has thermal runaway according to the performance parameters and controls the switch to disconnect, so that the triggering device stops working and avoids safety accidents of the battery. At the same time, when the triggering device stops working, the collection device also stops working, so that the collection device no longer collects the performance parameters of the battery after the battery has thermal runaway, making the collected performance parameters more accurate.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery detection system according to an embodiment of the present application.

[0020] REFERENCE SIGNS:

[0021] 1 - Switch; 2 - Collection device; 3 - Triggering device; 4 - Controller; 5 - External power supply; 6 - Battery; 7 - Conversion device; 21 - Pressure measuring component; 22 - Voltage sampling line; 23 - Temperature measuring component; 31 - Charging module; 32 - Heating component; 41 - Data processing module; 42 - State judgment module; 43 - Switch control module; 71 - Conversion module; 72 - Power supply module; 321 - Heating tape; 322 - Heating wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0023] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally indicates an "or" relationship between the associated objects before and after.

[0024] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0025] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0026] The battery detection system provided by the embodiments of this application will be described in detail below with reference to the drawings, through specific embodiments and their application scenarios.

[0027] As Figure 1 shown, the battery detection system according to some embodiments of this application includes: a switch member 1, a collection device 2, a trigger device 3, and a controller 4; the switch member 1 is used to connect to an external power supply 5, the collection device 2 and the trigger device 3 are respectively electrically connected to the switch member 1, and the controller 4 is respectively electrically connected to the collection device 2 and the switch member 1; the trigger device 3 is used to connect to a battery 6 to trigger the battery 6 to undergo thermal runaway, the collection device 2 is used to collect the performance parameters of the battery, and the controller 4 is used to determine that the battery 6 has undergone thermal runaway based on the performance parameters and control the switch member 1 to disconnect.

[0028] In the embodiments of the present application, by connecting the switch 1 to an external power supply 5, the acquisition device 2 and the trigger device 3 are respectively electrically connected to the switch 1, and the controller 4 is respectively electrically connected to the acquisition device 2 and the switch 1; the trigger device 3 is connected to the battery 6 to trigger the thermal runaway of the battery 6. In this way, the acquisition device 2 can collect the performance parameters of the battery in real time during the process of triggering the thermal runaway of the battery 6, and send the performance parameters to the controller 4. The controller 4 determines that the battery 6 has a thermal runaway according to the performance parameters and controls the switch 1 to disconnect, so that the trigger device 3 stops working, avoiding safety accidents of the battery 6. At the same time, when the trigger device 3 stops working, the acquisition device 2 also stops working, so that the acquisition device 2 no longer collects the performance parameters of the battery after the thermal runaway of the battery 6, making the collected performance parameters more accurate.

[0029] Specifically, the performance parameters of the battery may include parameters such as the temperature, current, and voltage of the battery. After the acquisition device 2 acquires the temperature, current, voltage, etc. of the battery, it sends them to the controller 4, and the controller 4 calculates and determines whether the battery 6 has a thermal runaway according to the temperature, current, voltage, etc. of the battery. For example, the controller 4 can calculate the actual temperature change rate of the battery according to the temperature and / or calculate the actual voltage change rate of the battery according to the voltage, and compare the actual temperature change rate and / or the actual voltage change rate with the preset temperature change rate and / or the preset voltage change rate in the controller 4. If the actual temperature change rate and / or the actual voltage change rate is greater than or equal to the preset temperature change rate and / or the preset voltage change rate, the controller 4 determines that the battery 6 has a thermal runaway, and at this time the controller 4 controls the switch 1 to disconnect.

[0030] In some embodiments, the external power supply 5 may be a direct current power supply device. The direct current power supply device is connected to the switch 1, and the direct current power supply device can provide power for the acquisition device 2 and the trigger device 3 to enable the acquisition device 2 and the trigger device 3 to work properly.

[0031] In still other embodiments, the controller 4 is separately connected to the external power supply 5 so that the controller 4 can still work after the switch 1 is disconnected.

[0032] Optionally, as Figure 1 shown, the battery detection system further includes a conversion device 7; the conversion device 7 is electrically connected to the switch 1, and the acquisition device 2 and the trigger device 3 are respectively electrically connected to the conversion device 7; the conversion device 7 is used to convert the alternating current provided by the external power supply 5 into direct current to supply power to the acquisition device 2 and the trigger device 3.

[0033] In the embodiments of the present application, by electrically connecting the conversion device 7 to the switch 1, the acquisition device 2 and the trigger device 3 are respectively electrically connected to the conversion device 7. In this way, the conversion device 7 can convert the alternating current provided by the external power supply 5 into direct current to supply power to the acquisition device 2 and the trigger device 3.

[0034] Optionally, as Figure 1 shown, the conversion device 7 includes a conversion module 71 and a power supply module 72; the conversion module 71 is electrically connected to the switch 1, the power supply module 72 is electrically connected to the conversion module 71, and the trigger device 3 and the acquisition device 2 are respectively electrically connected to the power supply module 72. The conversion module 71 is used to convert the alternating current provided by the power supply into direct current, and the power supply module 72 is used to supply direct current to the acquisition device 2 and the trigger device 3.

[0035] In the embodiment of the present application, by electrically connecting the conversion module 71 to the switch 1, the power supply module 72 to the conversion module 71, and the trigger device 3 and the acquisition device 2 to the power supply module 72 respectively. In this way, it is convenient for the conversion module 71 to convert the alternating current provided by the external power supply 5 into direct current, and the power supply module 72 to deliver the direct current to the acquisition device 2 and the trigger device 3, so as to supply power to the acquisition device 2 and the trigger device 3.

[0036] Optionally, as Figure 1 shown, the trigger device 3 includes a charging module 31. The charging module 31 is connected to the conversion device 7 and is used to connect to the battery 6 and charge the battery 6 to trigger the thermal runaway of the battery 6.

[0037] In the embodiment of the present application, by connecting the charging module 31 to the conversion device 7 and the charging module 31 to the battery 6, in this way, it is convenient for the charging module 31 to charge the battery 6, so that the battery 6 undergoes thermal runaway under the action of the charging module 31.

[0038] In some embodiments, the charging module 31 is connected to the power supply module 72 in the conversion device 7. The charging module 31 is connected to the positive and negative electrodes of the battery through wires. The charging module 31 can charge the battery 6 with constant voltage, constant current or constant power, so that the battery 6 undergoes thermal runaway under different charging modes.

[0039] In still other embodiments, the charging module 31 can be integrated in the conversion device 7, or the charging module 31 can exist independently. The embodiments of the present application do not limit this here.

[0040] Optionally, as Figure 1 shown, the acquisition device 2 includes: a pressure measuring member 21; the pressure measuring member 21 is electrically connected to the controller 4. The pressure measuring member 21 is used to collect the real-time voltage of the battery, and the controller 4 is used to determine that the battery 6 undergoes thermal runaway based on the real-time voltage and control the switch 1 to disconnect.

[0041] In an embodiment of the present application, by electrically connecting the pressure measuring member 21 to the controller 4, in this way, the pressure measuring member 21 can collect the real-time voltage of the battery and send the real-time voltage to the controller 4. The controller 4 calculates the voltage change rate based on the real-time voltage to determine that the battery 6 has a thermal runaway and controls the switch member 1 to disconnect, thereby controlling the charging module 31 to stop working and avoiding safety accidents of the battery 6.

[0042] Optionally, as Figure 1 shown, the acquisition device 2 further includes a voltage sampling line 22; one end of the voltage sampling line 22 is connected to the pressure measuring member 21, and the other end of the voltage sampling line 22 is used to connect to the electrode of the battery.

[0043] In an embodiment of the present application, by connecting one end of the voltage sampling line 22 to the pressure measuring member 21 and the other end of the voltage sampling line 22 is used to connect to the positive and negative electrodes of the battery, in this way, it is convenient for the pressure measuring member 21 to accurately measure the voltage change rate of the battery through the voltage sampling line 22.

[0044] In some embodiments, the voltage sampling line 22 can be made of indium phosphide material or other materials, which are not limited in the embodiments of the present application.

[0045] Optionally, as Figure 1 shown, the triggering device 3 includes a heating member 32; the heating member 32 is connected to the conversion device 7, and the heating member 32 is used to connect to the battery 6 and heat the battery 6 to trigger the battery 6 to have a thermal runaway.

[0046] In an embodiment of the present application, by connecting the heating member 32 to the conversion device 7 and connecting the heating member 32 to the battery 6, in this way, it is convenient for the heating member 32 to heat the battery 6 through the power supply of the conversion device 7 to cause the battery 6 to have a thermal runaway.

[0047] In some embodiments, the heating member 32 can be a rod-shaped, strip-shaped or sheet-shaped heating member 32, and the shape of the heating member 32 is adapted according to the shape of the battery, which is not limited in the embodiments of the present application.

[0048] Optionally, as Figure 1 shown, the acquisition device 2 includes: a temperature measuring member 23; the temperature measuring member 23 is electrically connected to the controller 4, and the temperature measuring member 23 is used to be arranged on the outer surface of the battery to detect the real-time temperature of the battery, and the controller 4 is used to determine that the battery 6 has a thermal runaway based on the real-time temperature and control the switch member 1 to disconnect.

[0049] In the embodiment of the present application, by electrically connecting the temperature measuring member 23 to the controller 4, and arranging the temperature measuring member 23 on the outer surface of the battery, in this way, it is convenient for the temperature measuring member 23 to detect the real-time temperature of the battery and send the real-time temperature to the controller 4. The controller 4 calculates the temperature change rate based on the real-time temperature to determine that the battery 6 has a thermal runaway and controls the switch member 1 to disconnect, thereby controlling the heating member 32 to stop working and avoiding safety accidents of the battery 6.

[0050] Optionally, as Figure 1 shown, the heating member 32 includes a heating tape 321; the heating tape 321 is used to be arranged on the outer surface of the battery to heat the battery 6.

[0051] In the embodiment of the present application, by arranging the heating tape 321 on the outer surface of the battery, in this way, the battery 6 can be heated by the heating tape 321 to cause a thermal runaway of the battery 6.

[0052] In some embodiments, the heating tape 321 can be evenly arranged on the surface of the battery. For example, the heating tape 321 is arranged on the front and rear surfaces of the battery, or the heating tape 321 is arranged on the left and right surfaces of the battery. The embodiments of the present application do not limit this here.

[0053] In still other embodiments, the heating member 32 further includes a heating wire 322. One end of the heating wire 322 is connected to the heating tape 321, and the other end is connected to the power supply module 72.

[0054] Optionally, as Figure 1 shown, the controller 4 includes a data processing module 41, a state judgment module 42, and a switch member control module 43; the data processing module 41 is electrically connected to the acquisition device 2 and is used to determine the parameter change rate based on the performance parameters acquired by the acquisition device 2; the state judgment module 42 is electrically connected to the data processing module 41 and is used to judge whether the battery 6 has a thermal runaway based on the parameter change rate; the switch member control module 43 is electrically connected to the state judgment module 42 and the switch member 1 and is used to control the switch member 1 to disconnect when the state judgment module 42 determines that the battery 6 has a thermal runaway.

[0055] In the embodiment of the present application, the data processing module 41 is electrically connected to the acquisition device 2, the state judgment module 42 is electrically connected to the data processing module 41, and the switch control module 43 is electrically connected to the state judgment module 42 and the switch 1. In this way, the data processing module 41 generates an actual temperature change rate and an actual voltage change rate according to the real-time temperature and real-time voltage collected by the acquisition device 2, and sends the actual temperature change rate and the actual voltage change rate to the state judgment module 42. The state judgment module 42 compares the actual temperature change rate and the actual voltage change rate with a preset temperature change rate and / or a preset voltage change rate. If the actual temperature change rate and / or the actual voltage change rate is greater than or equal to the preset temperature change rate and / or the preset voltage change rate, the state judgment module 42 sends a signal to the switch control module 43, and the switch control module 43 controls the switch 1 to disconnect according to the signal.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery detection system, characterized in that, Comprising: A switch, a collection device, a triggering device, and a controller; The switch is used to connect to an external power supply. The collection device and the triggering device are respectively electrically connected to the switch, and the controller is respectively electrically connected to the collection device and the switch; The triggering device is used to connect to a battery to trigger thermal runaway of the battery. The collection device is used to collect performance parameters of the battery, and the controller is used to determine that the battery has experienced thermal runaway based on the performance parameters and control the switch to disconnect.

2. The battery detection system according to claim 1, wherein The battery detection system further includes a conversion device; The conversion device is electrically connected to the switch. The collection device and the triggering device are respectively electrically connected to the conversion device; the conversion device is used to convert the alternating current provided by the external power supply into direct current to supply power to the collection device and the triggering device.

3. The battery detection system according to claim 2, wherein The conversion device includes a conversion module and a power supply module; The conversion module is electrically connected to the switch, the power supply module is electrically connected to the conversion module, the triggering device and the collection device are respectively electrically connected to the power supply module. The conversion module is used to convert the alternating current provided by the external power supply into the direct current, and the power supply module is used to supply the direct current to the collection device and the triggering device.

4. The battery detection system according to claim 2, wherein The triggering device includes a charging module. The charging module is connected to the conversion device and is used to connect to the battery and charge the battery to trigger thermal runaway of the battery.

5. The battery detection system according to claim 4, wherein The collection device includes: a pressure measuring member; the pressure measuring member is electrically connected to the controller and is used to collect the real-time voltage of the battery. The controller is used to determine that the battery has experienced thermal runaway based on the real-time voltage and control the switch to disconnect.

6. The battery detection system according to claim 5, wherein, The collection device further includes a voltage sampling line; one end of the voltage sampling line is connected to the pressure measuring member, and the other end of the voltage sampling line is used to connect to the electrode of the battery.

7. The battery detection system according to claim 2, wherein The triggering device includes a heating member; the heating member is connected to the conversion device and is used to connect to the battery and heat the battery to trigger thermal runaway of the battery.

8. The battery detection system according to claim 7, wherein The collection device includes: a temperature measuring member; the temperature measuring member is electrically connected to the controller and is used to be disposed on the outer surface of the battery to detect the real-time temperature of the battery. The controller is used to determine that the battery has experienced thermal runaway based on the real-time temperature and control the switch to disconnect.

9. The battery detection system according to claim 8, characterized in that, The heating member includes a heating tape; the heating tape is used to be disposed on the outer surface of the battery to heat the battery.

10. The battery detection system according to any one of claims 1-9, characterized in that, The controller includes a data processing module, a state judgment module, and a switch control module; The data processing module is electrically connected to the collection device and is used to determine a parameter change rate based on the performance parameters collected by the collection device; The state judgment module is electrically connected to the data processing module and is used to judge whether the battery has experienced thermal runaway based on the parameter change rate; The switch control module is electrically connected to the state judgment module and the switch, and is used to control the switch to disconnect when the state judgment module determines that the battery has experienced thermal runaway.

Images