Detection method, device and system, electronic device, battery system and storage medium

Abstract

The invention discloses a detection method, a detection device, a temperature detection system, an electronic device, a battery system and a storage medium. The detection method comprises the steps that under the condition that the state of a first thermistor is a first state, the state of a second thermistor is obtained, the state of the first thermistor is determined according to the resistance value of the first thermistor, and the state of the second thermistor is determined according to the resistance value of the second thermistor; and determining the state of the temperature sensor according to the state of the second thermistor. According to the detection method provided by the invention, the abnormal working states of the thermistor and the temperature sensor can be detected, so that the thermistor and the temperature sensor which work abnormally can be checked, and the temperature detection reliability of the temperature sensor is improved.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and more specifically, to a detection method, a detection device, a temperature detection system, an electronic device, a battery system, and a storage medium. Background Art

[0002] As an important part of electronic equipment, the battery system needs to monitor the temperature of the entire system at all times and provide early fault warnings or other fault prevention measures based on the temperature. Therefore, the reliability of the battery system's temperature information is crucial.

[0003] The temperature sensor is an important component for detecting temperature. A thermistor may be provided in the temperature sensor to realize the temperature collection function. When the thermistor works abnormally, the temperature information collected by the temperature sensor is wrong, which may cause the battery system to execute wrong fault prevention measures. Summary of the invention

[0004] The embodiments of the present application provide a detection method, a detection device, a temperature detection system, an electronic device, a battery system, and a storage medium. The detection method includes: when the state of a first thermistor is a first state, obtaining the state of a second thermistor, the state of the first thermistor is determined according to the resistance value of the first thermistor, and the state of the second thermistor is determined according to the resistance value of the second thermistor; determining the state of the temperature sensor according to the state of the second thermistor.

[0005] In this way, the detection method provided in the embodiment of the present application can detect the abnormal working state of the thermistor and the temperature sensor, so as to troubleshoot the abnormally working thermistor and the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0006] In some embodiments, when the resistance value of the first thermistor is outside the first preset resistance value range, the state of the first thermistor is the first state, and when the resistance value of the first thermistor is within the first preset resistance value range, the state of the first thermistor is the second state.

[0007] In this way, when the resistance value of the first thermistor is outside the first preset resistance value range, it can be determined that the first thermistor is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0008] In some embodiments, when the change in the resistance value of the first thermistor is greater than the second preset resistance change, the state of the first thermistor is the first state, and when the change in the resistance value of the first thermistor is less than or equal to the second preset resistance change, the state of the first thermistor is the second state.

[0009] In this way, when the change in the resistance value of the first thermistor is greater than the second preset resistance change, it can be determined that the first thermistor is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0010] In some embodiments, when the resistance value of the second thermistor is outside the third preset resistance value range, the state of the second thermistor is the first state, and when the resistance value of the second thermistor is within the third preset resistance value range, the state of the second thermistor is the second state.

[0011] In this way, when the resistance value of the second thermistor is outside the third preset resistance value range, it can be determined that the second thermistor is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0012] In some embodiments, when the change in the resistance value of the second thermistor is greater than a fourth preset resistance change, the state of the second thermistor is the first state, and when the change in the resistance value of the second thermistor is less than or equal to the fourth preset resistance change, the state of the second thermistor is the second state.

[0013] In this way, when the change in the resistance value of the second thermistor is greater than the fourth preset resistance change, it can be determined that the second thermistor is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0014] In some embodiments, when the state of the first thermistor is the first state and the state of the second thermistor is the first state, the state of the temperature sensor is the first state; when the state of the first thermistor is the second state or the state of the second thermistor is the second state, the state of the temperature sensor is the second state.

[0015] In this way, abnormally working thermistors and temperature sensors can be checked, thereby improving the reliability of temperature detection by the temperature sensor.

[0016] In certain embodiments, the detection method is used in a battery system, the battery system comprising the temperature sensor and a battery, the temperature sensor being configured to detect the temperature of the battery.

[0017] In some embodiments, the battery system further includes a voltage divider circuit, wherein the voltage divider circuit is configured to provide an output voltage according to a resistance value of an access resistor. The method includes: when the state of the first thermistor is a first state, controlling the second thermistor to access the voltage divider circuit to obtain the output voltage, wherein the state of the second thermistor is determined according to the output voltage value.

[0018] In this way, the state of the second thermistor can be determined according to the voltage value of the second thermistor, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0019] In some embodiments, the battery system further includes a voltage divider circuit, which is configured to provide an output voltage according to the resistance value of an access resistor. The method includes: controlling the first thermistor to access the voltage divider circuit to obtain the output voltage, and the state of the first thermistor is determined according to the output voltage.

[0020] In this way, the state of the second thermistor can be determined according to the voltage value of the first thermistor, so as to troubleshoot the abnormality of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0021] The detection device provided in the embodiment of the present application includes a transceiver unit and a processing unit. The transceiver unit is configured to obtain the state of the second thermistor when the state of the first thermistor is the first state, and the processing unit is configured to determine the state of the temperature sensor according to the state of the second thermistor.

[0022] The electronic device provided in the embodiment of the present application includes a memory and a processor, wherein the memory is configured to store a computer program, and when the processor executes the computer program, the detection method of the above embodiment of the claim is implemented.

[0023] The temperature detection system provided in the embodiment of the present application includes the detection device and the temperature sensor of the above embodiment. When the temperature sensor works normally, the temperature detection system is configured to determine the temperature detection value according to the resistance value of the first thermistor or the resistance value of the second thermistor.

[0024] An embodiment of the present application further provides a battery system, which includes the temperature detection system of the above embodiment.

[0025] An embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a processor, it implements the detection method of any one of the above embodiments.

[0026] The embodiments of the present application provide a detection method, a detection device, a temperature detection system, an electronic device, a battery system, and a storage medium. The detection method includes: when the state of a first thermistor is a first state, obtaining the state of a second thermistor, the state of the first thermistor is determined according to the resistance value of the first thermistor, and the state of the second thermistor is determined according to the resistance value of the second thermistor; determining the state of the temperature sensor according to the state of the second thermistor.

[0027] The first thermistor can be set as a common thermistor, the second thermistor can be set as a spare thermistor, and multiple second thermistors can be provided. In the case where the common thermistor cannot work normally, the state of the temperature sensor can be determined according to the state of the spare thermistor. If the spare thermistor also cannot work normally, the temperature sensor cannot work normally. If there is a spare thermistor that can work normally, the temperature sensor can work normally. In this way, the detection method provided in the embodiment of the present application can enable the second thermistor when the first thermistor fails, and determine the abnormal working state of the temperature sensor based on the state detection of the second thermistor, so as to avoid the abnormal working thermistor affecting the detection of the temperature sensor and improve the reliability of the temperature detection of the temperature sensor.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a schematic diagram of the process of the detection method of the embodiment of the present application;

[0031] Figure 2 is a schematic diagram of a detection device and a temperature detection system according to an embodiment of the present application;

[0032] Figure 3 is a schematic diagram of a detection device according to an embodiment of the present application determining a state of a thermistor;

[0033] Figure 4 is a schematic diagram of a battery system according to an embodiment of the present application;

[0034] Figure 5 is another schematic flow chart of the detection method according to the embodiment of the present application;

[0035] Figure 6 Schematic diagram of a temperature sensor according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0037] As an important part of electronic equipment, the battery system needs to monitor the temperature of the entire system at all times and provide early fault warnings or other fault prevention measures based on the temperature. Therefore, the reliability of the battery system's temperature information is crucial.

[0038] The temperature sensor is an important component for detecting temperature. A thermistor may be provided in the temperature sensor to realize the temperature collection function. When the thermistor works abnormally, the temperature information collected by the temperature sensor is wrong, which may cause the battery system to execute wrong fault prevention measures.

[0039] Reference Figure 1 The present application provides a method for detecting a temperature sensor, wherein the temperature sensor includes a first thermistor and a second thermistor, and the detection method includes:

[0040] 01: when the state of the first thermistor is the first state, obtain the state of the second thermistor, the state of the first thermistor is determined according to the resistance value of the first thermistor, and the state of the second thermistor is determined according to the resistance value of the second thermistor;

[0041] 02: Determine the state of the temperature sensor based on the state of the second thermistor.

[0042] Reference Figure 2 The embodiment of the present application further provides a detection device 20, and the detection method of the embodiment of the present application can be implemented by the detection device 20 of the embodiment of the present application. Specifically, the detection device 20 includes a transceiver unit 21 and a processing unit 22. The transceiver unit 21 is configured to obtain the state of the second thermistor 12 when the state of the first thermistor 11 is the first state, and the processing unit 22 is configured to determine the state of the temperature sensor 10 according to the state of the second thermistor 12.

[0043] The embodiment of the present application also provides an electronic device, and the detection method of the embodiment of the present application can be implemented by the electronic device of the embodiment of the present application. Specifically, the electronic device may include a memory and a processor, the memory is configured to store a computer program, the processor can obtain the state of the second thermistor 12 when the state of the first thermistor 11 is the first state, and the processor can also determine the state of the temperature sensor 10 according to the state of the second thermistor 12.

[0044] Specifically, in step 01, the states of the first thermistor 11 and the second thermistor 12 may include a first state and a second state. When the thermistor is operating normally, the state of the thermistor is the second state. The corresponding relationship between the resistance value of the thermistor and the temperature is determined, and the temperature can be determined based on the resistance value of the thermistor. When the corresponding relationship between the resistance value of the thermistor and the temperature deviates, the state of the thermistor is the first state, and the ambient temperature obtained based on the thermistor value is inaccurate.

[0045] Whether the corresponding relationship between the resistance value of the thermistor and the temperature has deviated can be determined based on the resistance value of the thermistor. For example, if the resistance value of the thermistor changes greatly when the temperature change is small, it can be considered that the corresponding relationship between the resistance value of the thermistor and the temperature has deviated. If the resistance value of the positive temperature coefficient thermistor decreases when the temperature rises, it can be considered that the corresponding relationship between the resistance value of the thermistor and the temperature has deviated, that is, the state of the thermistor can be determined to be the first state.

[0046] In step 02, the state of the temperature sensor 10 may include a first state and a second state. When the temperature sensor 10 can work normally, the state of the temperature sensor 10 is the second state. When the temperature sensor 10 cannot work normally, the state of the temperature sensor 10 is the first state.

[0047] The first thermistor 11 can be set as a common thermistor, the second thermistor 12 can be set as a spare thermistor, and a plurality of second thermistors 12 can be provided. In the case where the common thermistor cannot work normally, the state of the temperature sensor 10 can be determined according to the state of the spare thermistor. If the spare thermistor cannot work normally, the state of the temperature sensor 10 is the first state. If there is a spare thermistor that can work normally, the state of the temperature sensor 10 is the second state.

[0048] When the first thermistor 11 fails, the second thermistor 12 can be enabled, and the abnormal working state of the temperature sensor 10 can be determined based on the state detection of the second thermistor 12, so as to avoid the abnormal working thermistor affecting the detection of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10.

[0049] It can be understood that the detection method provided in the embodiment of the present application can detect the abnormal working state of the thermistor and the temperature sensor 10, so as to troubleshoot the abnormally working thermistor and the temperature sensor 10, improve the reliability of the temperature detection of the temperature sensor 10, and avoid the battery system from executing erroneous fault prevention measures due to erroneous temperature information.

[0050] In some embodiments, when the resistance value of the first thermistor 11 is outside the first preset resistance value range, the state of the first thermistor 11 is the first state, and when the resistance value of the first thermistor 11 is within the first preset resistance value range, the state of the first thermistor 11 is the second state.

[0051] Specifically, the first thermistor 11 has a corresponding operating temperature range. Within the operating temperature range of the first thermistor 11, the corresponding relationship between the resistance value of the first thermistor 11 and the temperature is determined, and the resistance value range of the first thermistor 11 is also determined. Figure 3 , the operating temperature range of the first thermistor 11 can be set to temperature T01 ~ temperature Tn1, and the operating temperature range of the automotive-grade thermistor can be set to -40℃ ~ 150℃. The first preset resistance value range can be set to resistance value R01 ~ resistance value Rn1. The resistance value of the positive temperature coefficient thermistor (Positive Temperature Coefficien1tthermistor, PTC) increases with the increase of temperature. For PTC, temperature T01 corresponds to resistance value R01, and temperature Tn1 corresponds to resistance value Rn1. The resistance value of the negative temperature coefficient thermistor (negative Temperature Coefficien1tthermistor, NTC) decreases with the increase of temperature. For NTC, temperature T01 corresponds to resistance value Rn1, and temperature Tn1 corresponds to resistance value R01.

[0052] If the resistance value of the first thermistor 11 is outside the resistance value R01 to the resistance value Rn1, the operating temperature of the first thermistor 11 is outside the temperature T01 to the temperature Tn1, or the corresponding relationship between the resistance value and the temperature of the first thermistor 11 deviates, the first thermistor 11 works abnormally, and the state of the first thermistor 11 is the first state. If the resistance value of the first thermistor 11 is within the resistance value R01 to the resistance value Rn1, the resistance value of the first thermistor 11 is normal, and the state of the first thermistor 11 is the second state.

[0053] In this way, when the resistance value of the first thermistor 11 is outside the first preset resistance value range, it can be determined that the first thermistor 11 is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10.

[0054] In some embodiments, when the change in the resistance value of the first thermistor 11 is greater than the second preset resistance change, the state of the first thermistor 11 is the first state, and when the change in the resistance value of the first thermistor 11 is less than or equal to the second preset resistance change, the state of the first thermistor 11 is the second state.

[0055] Specifically, when the first thermistor 11 works normally, the corresponding relationship between the resistance value and the temperature of the first thermistor 11 is determined, and the temperature change can be determined according to the change in the resistance value of the first thermistor 11. When the change in the resistance value of the first thermistor 11 is greater than the second preset resistance change, it can be considered that the resistance value of the first thermistor 11 has a jump, the temperature change determined according to the change in the resistance value of the first thermistor 11 exceeds the normal temperature change trend, the corresponding relationship between the resistance value and the temperature of the first thermistor 11 deviates, the first thermistor 11 works abnormally, and the state of the first thermistor 11 is the first state. When the change in the resistance value of the first thermistor 11 is less than the second preset resistance change, the state of the first thermistor 11 is the second state.

[0056] The second preset resistance change can be set according to the actual application scenario. In some working scenarios, the required change in ambient temperature cannot exceed the temperature threshold T1, and the second preset resistance change can be set according to the corresponding relationship between the temperature threshold T1 and the resistance value and temperature of the first thermistor 11. In the case where the change in the resistance value of the first thermistor 11 is greater than the second preset resistance change, the temperature change detected and determined by the first thermistor 11 is greater than the temperature threshold T1, and the state of the first thermistor 11 is the first state.

[0057] For example, according to the needs of the working scene, the temperature change within one minute cannot exceed 5°C. If the change in the resistance value of the first thermistor 11 within one minute is greater than the second preset resistance change, the temperature change detected by the first thermistor 11 is greater than 5°C, and the state of the first thermistor 11 is the first state. The temperature change within four temperature sampling cycles cannot exceed 10°C. If the change in the resistance value of the first thermistor 11 within four temperature sampling cycles is greater than the second preset resistance change, the temperature change detected by the first thermistor 11 is greater than 10°C, and the state of the first thermistor 11 is the first state.

[0058] The second preset resistance change amount can also be determined based on the temperature change detected by other thermistors. For example, the temperature change amount determined by the detection of other thermistors is T2, and the second preset resistance change amount can be set based on the corresponding relationship between the temperature change amount T2 and the resistance value and temperature of the first thermistor 11. In the case where the change amount of the resistance value of the first thermistor 11 is greater than the second preset resistance change amount, the temperature change amount determined by the detection of the first thermistor 11 is too different from the temperature change amount T2, and the state of the first thermistor 11 is the first state.

[0059] In this way, when the change in the resistance value of the first thermistor 11 is greater than the second preset resistance change, it can be determined that the first thermistor 11 is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10.

[0060] In some embodiments, when the resistance value of the second thermistor 12 is outside the third preset resistance value range, the state of the second thermistor 12 is the first state, and when the resistance value of the second thermistor 12 is within the third preset resistance value range, the state of the second thermistor 12 is the second state.

[0061] Specifically, the second thermistor 12 has a corresponding operating temperature range. Within the operating temperature range of the second thermistor 12, the corresponding relationship between the resistance value of the second thermistor 12 and the temperature is determined, and the resistance value range of the second thermistor 12 is also determined. Figure 3 The operating temperature range of the second thermistor 12 can be set to a temperature of T02 to a temperature of Tn2, and the third preset resistance value range can be set to a resistance value of R02 to a resistance value of Rn2.

[0062] If the resistance value of the second thermistor 12 is outside the resistance value R02 to the resistance value Rn2, the operating temperature of the second thermistor 12 is outside the temperature T02 to the temperature Tn2, or the corresponding relationship between the resistance value and the temperature of the second thermistor 12 deviates, the second thermistor 12 is abnormal, and the state of the second thermistor 12 is the first state. If the resistance value of the second thermistor 12 is within the resistance value R02 to the resistance value Rn2, the resistance value of the second thermistor 12 is normal, and the state of the second thermistor 12 is the second state.

[0063] In this way, when the resistance value of the second thermistor 12 is outside the third preset resistance value range, it can be determined that the second thermistor 12 is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10.

[0064] In some embodiments, when the change in the resistance value of the second thermistor 12 is greater than the fourth preset resistance change, the state of the second thermistor 12 is the first state, and when the change in the resistance value of the second thermistor 12 is less than or equal to the fourth preset resistance change, the state of the second thermistor 12 is the second state.

[0065] Specifically, when the change in the resistance value of the second thermistor 12 is greater than the fourth preset resistance change, it can be considered that the resistance value of the second thermistor 12 has a jump, the temperature change determined based on the change in the resistance value of the second thermistor 12 exceeds the normal temperature change trend, the corresponding relationship between the resistance value and the temperature of the second thermistor 12 deviates, the second thermistor 12 works abnormally, and the state of the second thermistor 12 is the first state. When the change in the resistance value of the second thermistor 12 is less than the fourth preset resistance change, the state of the second thermistor 12 is the second state.

[0066] The fourth preset resistance change amount can be set according to the actual application scenario. In some working scenarios, the required change amount of the ambient temperature cannot exceed the temperature threshold T3, and the fourth preset resistance change amount can be set according to the corresponding relationship between the temperature threshold T3 and the resistance value and temperature of the second thermistor 12. In the case where the change amount of the resistance value of the second thermistor 12 is greater than the fourth preset resistance change amount, the temperature change amount detected and determined by the second thermistor 12 is greater than the temperature threshold T3, and the state of the second thermistor 12 is the first state.

[0067] The fourth preset resistance change amount can also be determined based on the temperature change detected by other thermistors. For example, the temperature change amount determined by the detection of other thermistors is T4, and the fourth preset resistance change amount can be set based on the corresponding relationship between the temperature change amount T4 and the resistance value and temperature of the second thermistor 12. When the change amount of the resistance value of the second thermistor 12 is greater than the fourth preset resistance change amount, the temperature change amount determined by the detection of the second thermistor 12 is too different from the temperature change amount T4, and the state of the second thermistor 12 is the first state.

[0068] In this way, when the change in the resistance value of the second thermistor 12 is greater than the fourth preset resistance change, it can be determined that the second thermistor 12 is operating abnormally, so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10.

[0069] In some embodiments, when the state of the first thermistor 11 is the first state and the state of the second thermistor 12 is the first state, the state of the temperature sensor 10 is the first state; when the state of the first thermistor 11 is the second state or the state of the second thermistor 12 is the second state, the state of the temperature sensor 10 is the second state.

[0070] Specifically, the first state is an abnormal working state, and the second state is a normal working state. The temperature sensor 10 may be provided with a plurality of first thermistors 11 and a plurality of second thermistors 12. If the first thermistor 11 or the second thermistor 12 can work normally, the temperature sensor 10 can use a normally working thermistor to detect the temperature to ensure that the temperature detected by the temperature sensor 10 is accurate. If both the first thermistor 11 and the second thermistor 12 cannot work normally, the temperature sensor 10 cannot accurately detect the temperature, and the abnormal working state of the temperature sensor 10 can be reported at this time so as to troubleshoot the abnormality of the temperature sensor 10.

[0071] In this way, the abnormally working thermistor and the temperature sensor 10 can be checked, thereby improving the reliability of the temperature detection of the temperature sensor 10.

[0072] Reference Figure 4 , the embodiment of the present application also provides a temperature detection system 100 and a battery system 1000.

[0073] In some embodiments, the detection method is used in a battery system 1000 , which includes a temperature sensor 10 and a battery. The temperature sensor 10 is configured to detect the temperature of the battery.

[0074] Specifically, the temperature detection system 100 includes a detection device 20 and a temperature sensor 10 of an embodiment of the present application. When the temperature sensor 10 works normally, the temperature detection system 100 is configured to determine a temperature detection value based on the resistance value of the first thermistor 11 or the resistance value of the second thermistor 12.

[0075] The temperature detection system 100 can be used in various application scenarios with precise temperature requirements, such as the manufacture of chemical processes such as ceramics and rubber, battery systems of electronic devices, chips and thermal warning devices, etc. The detection device 20 can detect the abnormal working state of the thermistor and the temperature sensor 10, so as to troubleshoot the abnormally working thermistor and the temperature sensor 10, improve the reliability of the temperature detection of the temperature sensor 10, and the temperature detected and determined by the temperature detection system 100 is more accurate.

[0076] The temperature detection system 100 can be used for the battery management system (BMS) in the battery system 1000. For example, the BMS and high-voltage components can be put into a distribution box. There can be many high-voltage connection ports in the distribution box. In order to ensure the reliability of the connection of the high-voltage connection ports, corresponding temperature sensors 10 can be set at the connection ports. The main control chip in the BMS can collect these temperature information and make some strategies based on the temperature information. When the acquired temperature information reaches a certain threshold, the corresponding relay in the battery system 1000 can be controlled to disconnect, so that the battery is prohibited from discharging. If the temperature information detected by the temperature sensor 10 is wrong, it may cause the battery to be prohibited from discharging under normal temperature conditions.

[0077] The main control chip in the BMS can sample the voltage of the thermistor in the temperature sensor 10, determine the working status of the temperature sensor 10, check the abnormally working thermistor and temperature sensor 10, improve the reliability of the temperature detection of the temperature sensor 10, and avoid the BMS from executing wrong fault prevention measures based on wrong temperature information.

[0078] In addition, the power battery in the battery system 1000 needs to be at a suitable temperature to exert the maximum performance of the battery. The temperature detected and determined by the temperature detection system 100 is more accurate, which is conducive to the power battery to exert the maximum performance.

[0079] Reference Figure 5 In some embodiments, the battery system 1000 further includes a voltage divider circuit, which is configured to provide an output voltage according to the resistance value of the access resistor. Step 01: Obtaining the state of the second thermistor 12, including:

[0080] 011: When the state of the first thermistor 11 is the first state, control the second thermistor 12 to be connected to the voltage divider circuit to obtain the output voltage;

[0081] 012: Determine the state of the second thermistor 12 according to the voltage value of the second thermistor 12.

[0082] In some embodiments, when the state of the first thermistor 11 is the first state, the processing unit 22 may control the second thermistor 12 to access the corresponding voltage divider circuit. When the second thermistor 12 is connected to the corresponding voltage divider circuit, the transceiver unit 21 may obtain the voltage value of the second thermistor 12, and determine the state of the second thermistor 12 according to the voltage value of the second thermistor 12.

[0083] In some embodiments, when the state of the first thermistor 11 is the first state, the processor may control the second thermistor 12 to access the corresponding voltage divider circuit. When the second thermistor 12 is connected to the corresponding voltage divider circuit, the processor may also obtain the voltage value of the second thermistor 12, and determine the state of the second thermistor 12 according to the voltage value of the second thermistor 12.

[0084] Specifically, the resistance value of the second thermistor 12 can be determined according to the voltage value of the second thermistor 12, and then the state of the second thermistor 12 can be determined. Figure 5 For example, the resistor RTC1 can be set as the first thermistor 11, and the resistor RTC2 can be set as the second thermistor 12. In the case that the resistor RTC1 cannot work normally, the node N1 can be controlled to be connected to the node N3, so that the resistor RTC2 forms a corresponding voltage divider circuit with the resistor R1 and the resistor R2. The voltage value provided by the voltage source VCC can be set to Ua, and the voltage value of the resistor RTC2 can be set to the voltage value URTC2. According to the voltage value URTC2, the resistance value of the second thermistor 12 can be determined to be URTC2*(R1+R2) / (Ua-URTC2).

[0085] Of course, a specific voltage sampling point may also be set, and the resistance value of the second thermistor 12 may be determined according to the voltage at the voltage sampling point. For example, the voltage value of the node N3 may be set to UN3, and the resistance value of the second thermistor 12 may be determined to be [UN3*(R1+R2)-Ua*R2] / (Ua-UN3) according to the voltage value UN3.

[0086] The operating voltage range of the resistor RTC2 can be set to a voltage value U02 to a voltage value Un2. If the voltage value URTC2 is within the voltage value U02 to the voltage value Un2, the state of the resistor RTC2 is the second state. If the voltage value URTC2 is outside the voltage value U02 to the voltage value Un2, the state of the resistor RTC2 is the first state. In the case where the voltage value URTC2 fluctuates, the state of the resistor RTC2 is the first state.

[0087] The corresponding relationship between the divided voltage of resistor RTC2 and the state of resistor RTC2 can be referred to the following table:

[0088] URTC2 Status of RTC2 Control node connection / disconnection Voltage sampling Less than U02 First State Node N1 is disconnected from node N3 open circuit Greater than Un2 First State Node N1 is disconnected from node N3 Short Circuit beat First State Node N1 is disconnected from node N3 Error sampling Other situations Second State Node N1 is connected to node N3 Normal sampling

[0089] When the resistor RTC2 is in the first state, the voltage value sampled at the voltage sampling point of the resistor RTC2 cannot accurately determine the temperature, and the processing unit 22 can obtain the information that the resistor RTC2 is in the first state, and control the node N1 to be disconnected from the node N3. When the resistor RTC2 is in the second state, the voltage value sampled at the voltage sampling point of the resistor RTC2 can accurately determine the temperature, and at this time, the control node N1 is connected to the node N3.

[0090] In this way, the state of the second thermistor 12 can be determined according to the voltage value of the second thermistor 12 , so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10 .

[0091] Further, when the resistor RTC2 is in the first state, the resistor RTC2 may be set as the first thermistor 11 , and the other standby thermistors may be set as the second thermistors 12 .

[0092] Reference Figure 5 In some embodiments, before 011: obtaining the state of the second thermistor 12, the method includes:

[0093] 001: Control the first thermistor 11 to access the voltage divider circuit to obtain an output voltage, and determine the state of the first thermistor 11 according to the output voltage.

[0094] In some embodiments, the processing unit 22 may control the first thermistor 11 to be connected to a corresponding voltage divider circuit. When the first thermistor 11 is connected to a corresponding voltage divider circuit, the transceiver unit 21 may obtain a voltage value of the first thermistor 11 and determine a state of the first thermistor 11 according to the voltage value of the first thermistor 11.

[0095] In some embodiments, the processor may control the first thermistor 11 to be connected to a corresponding voltage divider circuit. When the first thermistor 11 is connected to a corresponding voltage divider circuit, the processor may also obtain a voltage value of the first thermistor 11 and determine the state of the first thermistor 11 according to the voltage value of the first thermistor 11.

[0096] Specifically, the resistance value of the first thermistor 11 can be determined according to the voltage value of the first thermistor 11 , and then the state of the first thermistor 11 can be determined. For details, reference can be made to the implementation method of determining the state of the second thermistor 12 according to the voltage value of the second thermistor 12 .

[0097] Reference Figure 6When the resistor RTC2 is in the first state, the resistor RTC2 can be set to the first thermistor 11, and the resistor RTC3 can be set to the second thermistor 12, the control node N1 is disconnected from the node N3, and the node N1 is connected to the node N4, so that the resistor RTC3 is connected to the voltage divider circuit.

[0098] The voltage value provided by the voltage source VCC can be set to Ua, the voltage value of the resistor RTC3 can be set to the voltage value URTC3, and the resistance value of the second thermistor 12 can be determined as URTC3*(R1+R2) / (Ua-URTC3) according to the voltage value URTC3.

[0099] Of course, a specific voltage sampling point may also be set, and the resistance value of the second thermistor 12 may be determined according to the voltage at the voltage sampling point. For example, the voltage value of the node N4 may be set to UN4, and the resistance value of the second thermistor 12 may be determined to be [UN4*(R1+R2)-Ua*R2] / (Ua-UN4) according to the voltage value UN4.

[0100] The operating voltage range of resistor RTC3 can be set to voltage value U03 to voltage value Un3. If voltage value URTC3 is within voltage value U03 to voltage value Un3, the state of resistor RTC3 is the second state, and if voltage value URTC2 is outside voltage value U02 to voltage value Un2, the state of resistor RTC3 is the first state. In the case that voltage value URTC3 fluctuates, the state of resistor RTC2 is the first state.

[0101] In this way, the state of the second thermistor 12 can be determined according to the voltage value of the first thermistor 11 , so as to troubleshoot the abnormality of the temperature sensor 10 and improve the reliability of the temperature detection of the temperature sensor 10 .

[0102] The corresponding relationship between the divided voltage of resistor RTC3 and the state of resistor RTC3 can be referred to the following table:

[0103] URTC3 Status of RTC3 Control node connection / disconnection Voltage sampling Less than U03 First State Node N1 is disconnected from node N4 open circuit Greater than Un3 First State Node N1 is disconnected from node N4 Short Circuit beat First State Node N1 is disconnected from node N4 Error sampling Other situations Second State Node N1 is connected to node N4 Normal sampling

[0104] When the resistor RTC2 is in the second state, the voltage value sampled at the voltage sampling point set on the resistor RTC2 can accurately determine the temperature. At this time, the control node N1 is connected to the node N3, and the processing unit 22 can obtain the state information of the resistor RTC2. When the temperature sensor 10 is started next time, the control resistor RTC2 is connected to the voltage divider circuit, and the temperature is detected through the voltage sampling point set on the resistor RTC2.

[0105] When the resistor RTC2 is in the first state and the resistor RTC3 is in the second state, the voltage value sampled at the voltage sampling point set on the resistor RTC3 can accurately determine the temperature. At this time, the control node N1 is connected to the node N4, and the processing unit 22 can obtain the state information of the resistor RTC2 and the resistor RTC3. When the temperature sensor 10 is started next time, the control resistor RTC3 is connected to the voltage divider circuit, and the temperature is detected through the voltage sampling point set on the resistor RTC3.

[0106] When the resistor RTC2 is in the first state and the resistor RTC3 is in the second state, other thermistors can be controlled to be connected to the voltage divider circuit and the status information of other thermistors can be obtained. If most or all thermistors in the temperature sensor 10 cannot work normally, the temperature sensor 10 reports fault information.

[0107] The temperature sensor 10 can be set to include resistors RTC1, RTC2 and RTC3. The state of the temperature sensor 10 can refer to the following table:

[0108] Status of RTC1 Status of RTC2 Status of RTC3 Status of temperature sensor 10 Second State / / Second State First State Second State / Second State First State First State Second State Second State First State First State First State First State

[0109] An embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a processor, it implements the detection method of any one of the above embodiments.

[0110] Specifically, the storage medium may be any medium that can store a computer program, such as a ROM (read-only memory), a RAM (random access memory), a magnetic disk or an optical disk.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples 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. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0112] In addition, the term "connection" should be understood in a broad sense, for example, it can include fixed connection, detachable connection, or integral connection; it can include direct connection, indirect connection through an intermediate medium, and internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0113] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0114] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0115] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A detection method of a temperature sensor, wherein the temperature sensor comprises a first thermistor and a second thermistor, characterized in that: The method comprises: When the state of the first thermistor is a first state, acquiring the state of the second thermistor, the state of the first thermistor being determined according to the resistance value of the first thermistor, and the state of the second thermistor being determined according to the resistance value of the second thermistor; A state of the temperature sensor is determined based on a state of the second thermistor.

2. The detection method according to claim 1, characterized in that: When the resistance value of the first thermistor is outside the first preset resistance value range, the state of the first thermistor is the first state, and when the resistance value of the first thermistor is within the first preset resistance value range, the state of the first thermistor is the second state.

3. The detection method according to claim 1, characterized in that: When the change in the resistance value of the first thermistor is greater than the second preset resistance change, the state of the first thermistor is the first state, and when the change in the resistance value of the first thermistor is less than or equal to the second preset resistance change, the state of the first thermistor is the second state.

4. The detection method according to claim 1, characterized in that: When the resistance value of the second thermistor is outside the third preset resistance value range, the state of the second thermistor is the first state, and when the resistance value of the second thermistor is within the third preset resistance value range, the state of the second thermistor is the second state.

5. The detection method according to claim 1, characterized in that: When the change in the resistance value of the second thermistor is greater than the fourth preset resistance change, the state of the second thermistor is the first state; when the change in the resistance value of the second thermistor is less than or equal to the fourth preset resistance change, the state of the second thermistor is the second state.

6. The detection method according to claim 1, characterized in that: When the state of the first thermistor is the first state and the state of the second thermistor is the first state, the state of the temperature sensor is the first state; when the state of the first thermistor is the second state or the state of the second thermistor is the second state, the state of the temperature sensor is the second state.

7. The detection method according to any one of claims 1 to 6, characterized in that: The detection method is used in a battery system, the battery system comprises the temperature sensor and a battery, and the temperature sensor is configured to detect the temperature of the battery.

8. The detection method according to claim 7, characterized in that: The battery system further includes a voltage divider circuit, wherein the voltage divider circuit is configured to provide an output voltage according to a resistance value of an access resistor, and the method includes: When the state of the first thermistor is the first state, the second thermistor is controlled to be connected to the voltage divider circuit to obtain the output voltage, and the state of the second thermistor is determined according to the output voltage value.

9. The detection method according to claim 7, characterized in that: The battery system further includes a voltage divider circuit, wherein the voltage divider circuit is configured to provide an output voltage according to a resistance value of an access resistor, and the method includes: The first thermistor is controlled to be connected to the voltage divider circuit to obtain the output voltage, and the state of the first thermistor is determined according to the output voltage.

10. A detection device, configured to detect a temperature sensor, the temperature sensor comprising a first thermistor and a second thermistor, characterized in that: include: a transceiver unit configured to, when the state of the first thermistor is a first state, obtain a state of the second thermistor, the state of the first thermistor being determined according to a resistance value of the first thermistor, and the state of the second thermistor being determined according to a resistance value of the second thermistor; The processing unit is configured to determine a state of the temperature sensor according to a state of the second thermistor.

11. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is configured to store a computer program, and the processor implements the detection method according to any one of claims 1 to 9 when executing the computer program.

12. A temperature detection system, characterized in that: The system comprises the detection device and the temperature sensor as claimed in claim 10, wherein when the temperature sensor works normally, the temperature detection system is configured to determine the temperature detection value according to the resistance value of the first thermistor or the resistance value of the second thermistor.

13. A battery system, characterized in that: The battery system includes the temperature detection system according to claim 12.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the detection method according to any one of claims 1 to 9 is implemented.

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