Storage battery detection method, system and device

Abstract

The invention discloses a storage battery detection method, system and device. The method comprises the following steps: obtaining a detection voltage before discharge of a storage battery and a real-time discharge voltage in a discharge process, and recording discharge time; determining a real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; and determining a storage battery detection result according to the discharge time and the voltage difference. According to the method, the storage battery detection result is obtained through the algorithm, manual participation in the storage battery detection process is reduced, and the test efficiency and the test accuracy are improved. The method can be widely applied to the technical field of battery detection.

Description

Technical Field

[0001] The present application relates to the technical field of battery detection, and in particular to a battery detection method, system, and device. Background Art

[0002] In key facilities such as communication rooms, lead-acid batteries, as an important part of the backup power system, are responsible for providing emergency power supply when the city power is interrupted. These batteries need to be kept healthy and available at all times to ensure that they can be put into operation quickly and reliably in an emergency, thus ensuring the continuity and stability of the communication system.

[0003] During the use of lead-acid batteries, their performance will gradually decline due to factors such as charge and discharge cycles, ambient temperature changes, and battery aging. Traditional manual inspection methods have problems such as low efficiency, missed inspections, and false inspections, and are difficult to meet the maintenance needs of large-scale battery packs. Therefore, there are still technical problems that need to be solved in related technologies. Summary of the invention

[0004] The purpose of this application is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0005] Therefore, an object of the embodiments of the present application is to provide a battery detection method, system and device, which can improve the efficiency of battery quality testing.

[0006] In order to achieve the above-mentioned technical objectives, the technical solution adopted in the embodiments of the present application includes: a battery detection method, comprising: obtaining the detection voltage of the battery before discharging, the real-time discharge voltage during the discharge process and recording the discharge time; determining the real-time voltage difference of the battery based on the detection voltage and the real-time discharge voltage; determining the battery detection result based on the discharge time and the voltage difference.

[0007] In addition, the battery detection method according to the above embodiment of the present invention may also have the following additional technical features:

[0008] Further, in the embodiment of the present application, the discharge time includes a first time period and a second time period; and determining the battery detection result according to the discharge time and the voltage difference specifically includes:

[0009] Determine, according to the discharge time, a first preset voltage threshold corresponding to the first time period and a second preset voltage threshold corresponding to the second time period;

[0010] Determining a battery detection result according to the voltage difference and the first preset voltage threshold;

[0011] Alternatively, a battery detection result is determined according to the voltage difference, the first preset voltage threshold, and the second preset voltage threshold.

[0012] Further, in the embodiment of the present application, determining the battery detection result according to the voltage difference and the first preset voltage threshold includes:

[0013] In the first time period, if the voltage difference is greater than the first preset voltage threshold, it is determined that the battery detection result is that the battery quality is poor.

[0014] Further, in the embodiment of the present application, determining the battery detection result according to the voltage difference, the first preset voltage threshold and the second preset voltage threshold includes:

[0015] In the first time period, if the voltage difference is less than or equal to a first preset voltage threshold, and in the second time period, if the voltage difference is less than or equal to a second preset voltage threshold, it is determined that the battery detection result is that the battery quality is good.

[0016] Alternatively, in the first time period, if the voltage difference is less than or equal to a first preset voltage threshold, and in the second time period, if the voltage difference is greater than a second preset voltage threshold, it is determined that the battery detection result is poor battery quality.

[0017] Furthermore, in an embodiment of the present application, the first preset voltage threshold is 4 times the second preset voltage threshold.

[0018] Furthermore, in an embodiment of the present application, the discharge time includes a first time period and a second time period; the first time period and the second time period are two consecutive time periods; and the discharge time is 35 minutes.

[0019] Furthermore, in the embodiment of the present application, the first time period is the first 5 minutes after the battery discharge starts; the second time period is from the 6th minute to the 35th minute after the battery discharge starts.

[0020] On the other hand, the embodiment of the present application also provides a battery detection system, including:

[0021] An acquisition unit, used to acquire the detection voltage of the battery before discharge, the real-time discharge voltage during discharge and record the discharge time;

[0022] A first processing unit, configured to determine a real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage;

[0023] The second processing unit is used to determine the battery detection result according to the discharge time and the voltage difference.

[0024] On the other hand, the present application also provides a battery detection device, used to implement the battery detection method described in any one of 1-7 above, the device includes a discharge circuit and a control circuit; the battery and the control circuit are connected to the discharge circuit; the battery is connected to the control circuit;

[0025] The control circuit is used to collect the detection voltage of the battery before discharging, generate a control signal to enable the discharge circuit to perform the discharge operation of the battery, and detect the real-time discharge voltage and discharge time during the discharge process of the battery, and determine the real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; and determine the battery detection result according to the discharge time and the voltage difference.

[0026] Further, in an embodiment of the present application, the discharge circuit includes: a first transistor, a first resistor, a second resistor, and a third resistor. One end of the second resistor and one end of the third resistor are connected to the base of the first transistor. The other end of the second resistor is connected to the control circuit. The emitter of the first transistor and the other end of the third resistor are both grounded. One end of the first resistor is connected to the battery. The other end of the first resistor is connected to the collector of the first transistor.

[0027] The advantages and benefits of the present application will be partially given in the following description, and partially become apparent from the following description, or be understood through the practice of the present application:

[0028] The present application can obtain the detection voltage of the battery before discharge, the real-time discharge voltage during discharge and record the discharge time; determine the real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; and determine the battery detection result according to the discharge time and the voltage difference. The present application obtains the battery detection result through an algorithm, reduces manual participation in the battery detection process, and improves the test efficiency and test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the steps of a battery detection method in a specific embodiment of the present invention;

[0030] Figure 2 It is a circuit structure schematic diagram of a discharge circuit in a specific embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a module of a battery detection device in a specific embodiment of the present invention;

[0032] Figure 4 It is a circuit structure schematic diagram of a control circuit in a specific embodiment of the present invention;

[0033] Figure 5 It is a circuit structure schematic diagram of a DC voltage-stabilized power supply circuit in a specific embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the circuit structure of a voltage acquisition circuit in a specific embodiment of the present invention;

[0035] Figure 7 It is a circuit structure schematic diagram of a battery charging management circuit in a specific embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the circuit structure of a battery protection circuit in a specific embodiment of the present invention;

[0037] Fig. 9 It is a circuit structure schematic diagram of a discharge circuit in another specific embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the circuit structure of a battery status acquisition circuit in a specific embodiment of the present invention;

[0039] Fig.11 A schematic diagram of the circuit structure of a serial communication circuit in a specific embodiment of the present invention;

[0040] Fig.12 The figure is a schematic structural diagram of a battery detection system in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings to illustrate the principles and processes of the battery detection method, system and device in the embodiments of the present invention.

[0042] Reference Figure 1 , Figure 1 Schematic diagram of the steps of a battery detection method provided in an embodiment of the present application. Figure 1 In the embodiment, the battery detection method includes steps S101 to S103.

[0043] S101, obtaining the detection voltage of the battery before discharge, the real-time discharge voltage during discharge, and recording the discharge time.

[0044] S102: Determine the real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage.

[0045] S103: Determine the battery detection result according to the discharge time and the voltage difference.

[0046] Further, the discharge time includes a first time period and a second time period; the step of determining the battery detection result according to the discharge time and the voltage difference may specifically include step S201 and step S202, or include step S201 and step S203.

[0047] S201 . Determine, according to a discharge time, a first preset voltage threshold corresponding to a first time period and a second preset voltage threshold corresponding to a second time period.

[0048] S202: Determine a battery detection result according to the voltage difference and a first preset voltage threshold.

[0049] or,

[0050] S203: Determine a battery detection result according to the voltage difference, the first preset voltage threshold and the second preset voltage threshold.

[0051] Further, the step of determining the battery detection result according to the voltage difference and the first preset voltage threshold may include:

[0052] In the first time period, if the voltage difference is greater than a first preset voltage threshold, it is determined that the battery detection result is that the battery quality is poor.

[0053] Further, the step of determining the battery detection result according to the voltage difference, the first preset voltage threshold and the second preset voltage threshold may include:

[0054] S301. In a first time period, if the voltage difference is less than or equal to a first preset voltage threshold, and in a second time period, if the voltage difference is less than or equal to a second preset voltage threshold, it is determined that the battery detection result is that the battery quality is good.

[0055] or,

[0056] S302: In the first time period, if the voltage difference is less than or equal to the first preset voltage threshold, and in the second time period, if the voltage difference is greater than the second preset voltage threshold, determine that the battery detection result is poor battery quality.

[0057] Furthermore, the first preset voltage threshold is 4 times the second preset voltage threshold.

[0058] Furthermore, the discharge time includes a first time period and a second time period; the first time period and the second time period are two consecutive time periods. The discharge time is 35 minutes.

[0059] Furthermore, the first time period is the first 5 minutes after the battery starts discharging; and the second time period is from the 6th minute to the 35th minute after the battery starts discharging.

[0060] In addition, the present application also provides a battery detection device. The device can be used to implement any of the above-mentioned battery detection methods. The device can include a discharge circuit and a control circuit. The battery and the control circuit are connected to the discharge circuit. The battery is connected to the control circuit.

[0061] The control circuit can be used to collect the detection voltage before the battery is discharged and generate a control signal to enable the discharge circuit to perform the discharge operation of the battery. The control circuit can detect the real-time discharge voltage and discharge time during the discharge process of the battery, and determine the real-time voltage difference of the battery based on the detection voltage and the real-time discharge voltage. The control circuit can be used to determine the battery detection result based on the discharge time and the voltage difference.

[0062] Further, refer to Figure 2 The discharge circuit may include a first transistor Q4, a first resistor R18, a second resistor R19, and a third resistor R20. One end of the second resistor R19 and one end of the third resistor R20 are connected to the base of the first transistor Q4. The other end of the second resistor R19 is connected to the control circuit; the emitter of the first transistor Q4 and the other end of the third resistor R20 are both grounded. One end of the first resistor R18 is connected to the battery. The other end of the first resistor R18 is connected to the collector of the first transistor Q4.

[0063] The specific implementation principle of this application is described below with reference to the accompanying drawings:

[0064] This embodiment can add a load discharge device to the existing battery management system, which is equivalent to simulating the state of the battery with load when the mains power is lost. By using the MCU to perform regular discharge detection on the battery, poor quality batteries can be found in advance and replaced early. The detection device of this embodiment consists of Figure 2 shown.

[0065] Figure 3 In the figure, 1 is the whole composition of the detection device system, 2 is the working part of the control chip of the system, 3 is the serial communication part, 4 is the DC voltage regulated power supply part, 5 is the voltage acquisition part, 6 is the battery charging management part, 7 is the battery protection part, 8 is the load discharge part, and 9 is the battery status acquisition part.

[0066] The system uses DC power input, and the voltage range is between DC 12V and 20V. The input power is stabilized by the DC voltage regulator and then used by the control chip. The control chip starts working and first outputs control signals to the battery charging management part, the battery protection part and the load discharge part to perform three operations: shutting down charging, canceling battery protection and shutting down load discharge. Then read the data of the voltage acquisition part to obtain the voltage value of the input power supply. The control chip monitors the working status of the input power supply through the voltage value. Then read the data of the battery status acquisition part, which can obtain the temperature, voltage, current and short circuit status of the battery. If the battery current read is 0mA, it is judged that the battery is lost. When it is detected that the battery current is greater than 0mA, the control chip reads the battery voltage again. When the battery voltage is greater than 9V, it is judged that the battery is restored. The control chip will start battery charging, and the battery charging part will feedback the two states of charging and charging end to the control chip. When the battery voltage exceeds the preset protection voltage during the charging process, the control chip will turn on the battery protection part, and the battery protection will also be turned on when the battery discharge is lower than the preset voltage. The serial communication part transmits data such as input power voltage, battery voltage, battery current, battery short circuit, battery loss and charging status to other devices. In addition to performing the functions of acquisition and output control, the control chip also has the function of a timer. By timing the timer inside the control chip, the load discharge part is turned on once every 30 days to test the battery performance.

[0067] Figure 4 It is the working part of the control chip of the system. This part is the core of the system, used to store program code and execute programs, uses the internal clock to work, and is responsible for receiving data collected by other parts or output control.

[0068] Figure 5 This is the DC voltage stabilization power supply part. The function of this circuit is voltage stabilization. Since the input DC voltage exceeds the working voltage of the control chip, this circuit is used to convert the input voltage to DC 5V, and then the DC 5V is used by the control chip, so that the chip works within the range required by the specification.

[0069] Figure 6 This is the voltage acquisition part. Because the voltage to be acquired (NC15V) is higher than the voltage that the control chip can withstand, the resistor voltage division method is used to scale down the voltage to be acquired and input it into the control chip. After inputting it into the control chip, it is amplified in the program according to the inverse of the resistor voltage division ratio. The processed voltage data is used to judge the working status of the mains. If the voltage is lost or too low, it means that the mains is working abnormally.

[0070] Figure 7It is the battery charging management part. In the figure, CHRG_EN is the charging enable control, which controls the field effect transistor Q1 to turn off or on to turn off or turn on the charging through the field effect transistor Q2. U2 is a boost power chip, the purpose of which is to increase the input voltage for use by chip U4. U4 is a PWM step-down lead-acid battery charging management chip, which is very suitable for use in this system. The chip has four charging modes: trickle, constant current, overcharge and float charge. The constant current charging current can be set by the sampling resistor R13. U4 pin 3 is the charging status output, and the control chip obtains the charging status by reading this pin.

[0071] Figure 8 It is the battery protection part. BAT_OFF is the battery shutdown control pin, which is controlled by the control chip output. After the output is high level, the relay RL1 will be disconnected, thereby disconnecting the battery from the system to prevent the battery from over-discharging.

[0072] Fig. 9 It is the load discharge part. LOAD0 is the load control pin, which is controlled by the control chip. After outputting high level, transistor Q4 is turned on and the battery is discharged through resistor R18.

[0073] Fig.10 It is the battery status acquisition part. This part mainly collects the battery's temperature, voltage, current and short-circuit status. RT1 is a thermistor installed on the battery surface, used to detect the battery temperature. The resistance value changes with the temperature. The resistance value change is converted into a voltage signal TEMP change through the resistor voltage divider. The voltage signal TEMP is input to the control chip for processing, and then converted to obtain the battery temperature. Chip U1 is a voltage and current acquisition chip, used to collect the battery's voltage and current, and connected to the control chip through a bus. BAT_SHORT is the battery short-circuit status output, which is output by chip U3. Chip U3 is a voltage comparison chip that compares the battery voltage with the 1.2V voltage. When the battery voltage is lower than 1.2V, the comparison chip outputs a low level, and it is judged as a battery short circuit.

[0074] Fig.11 It is the serial communication part. Chip U8 is an RS-485 interface chip, which has the ability of multi-point communication and is used to connect other devices to transmit the information of the control system.

[0075] The detection device of the present application adds a battery load discharge function, and uses the timer in the control chip to regularly start the load discharge function. Before turning on the load, the control chip records the battery voltage, which is recorded as voltage Ua. After turning on the load, the battery starts to discharge, and the control chip continuously records the battery voltage, which is recorded as voltage Ub. If the voltage difference between Ua and Ub is greater than 2V within 5 minutes, the control chip directly determines that the battery quality is poor. If the voltage difference between Ua and Ub is still less than 2V after more than 5 minutes, the load will continue to be turned on for 30 minutes. The battery voltage within 30 minutes of the load being turned on is recorded as Uc. If the voltage difference between Ub and Uc is less than 0.5V within 30 minutes, the control chip determines that the battery quality is good, otherwise it is poor quality. The device of this embodiment can regularly detect the quality of the battery, discover the degradation of battery performance in advance, and replace it in time.

[0076] In addition, refer to Fig.12 ,and Figure 1 Corresponding to the method, a battery detection system is also provided in an embodiment of the present application. The system may include: an acquisition unit 1001, a first processing unit 1002 and a second processing unit 1003. The acquisition unit 1001 can be used to obtain the detection voltage of the battery before discharge, the real-time discharge voltage during discharge and record the discharge time. The first processing unit 1002 can be used to determine the real-time voltage difference of the battery based on the detection voltage and the real-time discharge voltage. The second processing unit 1003 can be used to determine the battery detection result based on the discharge time and the voltage difference.

[0077] It should be noted that the acquisition unit can be any integrated circuit unit or microprocessor unit obtained by integrating a chip having a processing function and its peripheral circuits through existing integration technology. The first processing unit and the second processing unit can also be any integrated circuit module or microprocessor module obtained by integrating a chip having a processing function and its peripheral circuits through existing integration technology. The first processing unit and the second processing unit can also include one or more memories. One or more memories can be used to store the specific algorithm used for compression adjustment processing in this application.

[0078] In some embodiments of the present application, the acquisition unit 1001 can be set in the same gateway or device with a processor as the processing unit 1002. The specific device connection mode and device setting of the acquisition unit 1001 and the first processing unit 1002 and the first processing unit 1002 and the second processing unit 1003 are not limited.

[0079] It should be noted that the contents of the above-mentioned battery detection method embodiment are all applicable to the present battery detection system embodiment, the functions specifically implemented by the present battery detection system embodiment are the same as those of the above-mentioned battery detection method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned battery detection method embodiment.

[0080] In some optional embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Optional embodiments are expected, wherein the order of various operations is changed and the sub-operation described as a part of a larger operation is performed independently.

[0081] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present application. More specifically, in view of the properties, functions, and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional techniques of the engineer. Therefore, those skilled in the art can implement the present application set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the attached claims and their equivalents.

[0082] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several programs to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0083] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable programs for implementing the logical functions, and may be embodied in any computer-readable medium for use by a program execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch and execute a program from a program execution system, device or apparatus), or in conjunction with such program execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by a program execution system, device or apparatus, or in conjunction with such program execution systems, devices or apparatuses.

[0084] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0085] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0087] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0088] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Technical personnel familiar with the field may make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A battery detection method, characterized in that: The following steps are involved: Obtain the detection voltage of the battery before discharge, the real-time discharge voltage during discharge and record the discharge time; Determining a real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; A battery detection result is determined according to the discharge time and the voltage difference.

2. A battery detection method according to claim 1, characterized in that: The discharge time includes a first time period and a second time period; and determining the battery detection result according to the discharge time and the voltage difference specifically includes: Determine, according to the discharge time, a first preset voltage threshold corresponding to the first time period and a second preset voltage threshold corresponding to the second time period; Determining a battery detection result according to the voltage difference and the first preset voltage threshold; Alternatively, a battery detection result is determined according to the voltage difference, the first preset voltage threshold, and the second preset voltage threshold.

3. A battery detection method according to claim 2, characterized in that: The step of determining a battery detection result according to the voltage difference and the first preset voltage threshold comprises: In the first time period, if the voltage difference is greater than the first preset voltage threshold, it is determined that the battery detection result is that the battery quality is poor.

4. A battery detection method according to claim 3, characterized in that: The step of determining a battery detection result according to the voltage difference, the first preset voltage threshold, and the second preset voltage threshold comprises: In the first time period, if the voltage difference is less than or equal to a first preset voltage threshold, and in the second time period, if the voltage difference is less than or equal to a second preset voltage threshold, it is determined that the battery detection result is that the battery quality is good; Alternatively, in the first time period, if the voltage difference is less than or equal to a first preset voltage threshold, and in the second time period, if the voltage difference is greater than a second preset voltage threshold, it is determined that the battery detection result is poor battery quality.

5. A battery detection method according to claim 1, characterized in that: The first preset voltage threshold is 4 times the second preset voltage threshold.

6. A battery detection method according to claim 5, characterized in that: The discharge time includes a first time period and a second time period; the first time period and the second time period are two consecutive time periods; the discharge time is 35 minutes.

7. A battery detection method according to claim 6, characterized in that: The first time period is 5 minutes before the battery starts discharging; the second time period is from the 6th minute to the 35th minute after the battery starts discharging.

8. A battery detection system, characterized in that: include: An acquisition unit, used to acquire the detection voltage of the battery before discharge, the real-time discharge voltage during discharge and record the discharge time; A first processing unit, configured to determine a real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; The second processing unit is used to determine the battery detection result according to the discharge time and the voltage difference.

9. A battery detection device, characterized in that: For implementing the battery detection method described in any one of 1-7 above, the device comprises a discharge circuit and a control circuit; the battery and the control circuit are connected to the discharge circuit; the battery is connected to the control circuit; The control circuit is used to collect the detection voltage of the battery before discharging, generate a control signal to enable the discharge circuit to perform the discharge operation of the battery, and detect the real-time discharge voltage and discharge time of the battery during the discharge process, and determine the real-time voltage difference of the battery according to the detection voltage and the real-time discharge voltage; And used to determine the battery detection result according to the discharge time and the voltage difference.

10. The battery detection device according to claim 9, characterized in that: The discharge circuit includes: a first transistor, a first resistor, a second resistor and a third resistor; one end of the second resistor and one end of the third resistor are connected to the base of the first transistor; the other end of the second resistor is connected to the control circuit; the emitter of the first transistor and the other end of the third resistor are both grounded; one end of the first resistor is connected to the battery; the other end of the first resistor is connected to the collector of the first transistor.

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