Battery inspection method and apparatus, readable storage medium

Abstract

This application provides a battery detection method and apparatus, and a readable storage medium. The battery detection apparatus includes a voltage measurement module connected to a battery to be detected and measuring the open-circuit voltage of the battery to be detected; a processor connected to the voltage measurement module and acquiring the open-circuit voltage; a constant voltage source connected to the processor and controlled by the processor to input a test voltage to the battery to be detected after the battery to be detected has been left standing for a predetermined period of time, the test voltage being equal to the open-circuit voltage; and a current measurement module connected to the battery to be detected and measuring the instantaneous current of the battery to be detected after the test voltage has been input. The processor is further connected to the current measurement module and acquires the instantaneous current, which is used to determine the self-discharge characteristics of the battery to be detected based on the instantaneous current and a preset current threshold. This detection apparatus is used to reduce battery detection costs, improve battery detection efficiency, and increase the applicability of battery detection.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery detection method and apparatus, and a readable storage medium.

Background Art

[0002] Due to the self-discharge of the battery, failure phenomena such as the voltage of the battery during storage being too low or the voltage becoming zero may occur. That is, since the self-discharge performance of the battery affects the quality of the battery, the self-discharge performance of the battery can be detected to determine the quality of the battery.

[0003] In the prior art, the self-discharge performance of the battery can be detected by the constant voltage charging method. The constant voltage charging method needs to occupy the device (detection device) channel for a long time during detection, resulting in waste of device cost and device energy consumption. Therefore, the detection efficiency is low, and the applicability of this detection method is also low.

Summary of the Invention

[0004] The object of this application is to provide a battery detection method and apparatus, and a readable storage medium in order to reduce the battery detection cost, improve the battery detection efficiency, and enhance the applicability of battery detection.

[0005] In a first aspect, the present application is connected to a battery awaiting detection, and includes a voltage measurement module for measuring the open-circuit voltage of the battery awaiting detection, a processor connected to the voltage measurement module for obtaining the open-circuit voltage, a constant voltage source connected to the processor and used to input a test voltage to the battery awaiting detection under the control of the processor after the battery awaiting detection has been left standing for a preset time, where the test voltage is the same as the open-circuit voltage, and a current measurement module connected to the battery awaiting detection for measuring the instantaneous current of the battery awaiting detection after the test voltage has been input. The processor is further connected to the current measurement module for obtaining the instantaneous current and using it to determine the self-discharge characteristic of the battery awaiting detection based on the instantaneous current and a preset current threshold, thereby providing a battery detection device.

[0006] In the present application, compared with the prior art, the detection principle of the constant voltage method is adopted. The difference from the existing constant voltage method is that after the corresponding voltage is input by the constant voltage source, the instantaneous current of the battery awaiting detection is measured. This enables immediate measurement of the battery without waiting for a long time, greatly improving the detection efficiency and saving the detection time and equipment (detection device) cost. Also, before the corresponding voltage is input by the constant voltage source, the battery awaiting detection needs to be left standing for a preset time. During this standing time, this detection device can continue to be connected to other batteries awaiting detection and detect other batteries awaiting detection. For example, it can measure the open-circuit voltage of other batteries awaiting detection. Furthermore, this detection device can detect a batch of batteries. Therefore, this detection device can reduce the battery detection cost and improve the battery detection efficiency, and has high applicability.

[0007] As a possible embodiment, the voltage measurement module includes a voltmeter, a first switch, and a first battery connection terminal. One end of the first switch is connected to one end of the voltmeter, and the other end of the first switch is connected to one end of the first battery connection terminal. The battery to be detected is connected to the voltage measurement module via the first battery connection terminal. The other end of the voltmeter is connected to the other end of the first battery connection terminal. The voltmeter is connected to the processor. When the battery to be detected is connected to the voltage measurement module via the first battery connection terminal, the first switch is closed, and the voltmeter measures the open-circuit voltage of the battery to be detected.

[0008] In this application, the voltage measurement module includes a voltmeter, a first switch, and a first battery connection terminal. The first switch and the first battery connection terminal can be used to connect and disconnect the battery to be detected, and the voltmeter can effectively measure the open-circuit voltage of the connected battery to be detected.

[0009] As a possible embodiment, the current measurement module includes an ammeter, a second switch, and a second battery connection terminal. One end of the ammeter is connected to the processor, and the other end of the ammeter is connected to one end of the second switch. The other end of the second switch is connected to the second battery connection terminal. The battery to be detected is connected to the current measurement module via the second battery connection terminal. When the battery to be detected is connected to the current measurement module via the second battery connection terminal, the second switch is closed, and the ammeter measures the instantaneous current of the battery to be detected.

[0010] In this application, the current measurement module includes an ammeter, a second switch, and a second battery connection terminal. The second switch and the second battery connection terminal can be used to connect and disconnect the battery to be detected, and the ammeter can effectively and quickly measure the instantaneous current of the connected battery to be detected.

[0011] As one possible embodiment, the detection device further includes a battery scanning module including a first battery scanning module connected to the voltage measurement module and a second battery scanning module connected to the current measurement module. Both the first battery scanning module and the second battery scanning module are connected to the processor. The first battery scanning module is used to determine the identifier of the battery waiting to be detected when the battery waiting to be detected is connected to the voltage measurement module and transmit it to the processor. Specifically, the processor is used to obtain the open circuit voltage corresponding to the identifier of the battery waiting to be detected and control the constant voltage source to input the test voltage corresponding to the identifier of the battery waiting to be detected to the battery waiting to be detected. The second battery scanning module is used to determine the identifier of the battery waiting to be detected when the battery waiting to be detected is connected to the current measurement module and transmit it to the processor. Specifically, the processor is used to obtain the instantaneous current corresponding to the identifier of the battery waiting to be detected and determine the self-discharge characteristic of the battery waiting to be detected based on the instantaneous current corresponding to the identifier of the battery waiting to be detected and a preset current threshold.

[0012] In this application, the detection device is further provided with a battery scanning module including a first battery scanning module and a second battery scanning module. The first battery scanning module can make the open circuit voltage of the battery waiting to be detected correspond to the identifier. Further, the processor can control the constant voltage source to input the test voltage corresponding to the identifier. The second battery scanning module can make the instantaneous current of the battery waiting to be detected correspond to the identifier. Further, the processor can determine the self-discharge characteristic of the battery based on the instantaneous current corresponding to the identifier. Furthermore, when this detection device detects a batch of batteries waiting to be detected, it can effectively distinguish (identify) the open circuit voltage and instantaneous current corresponding to each battery waiting to be detected, and realize the effective detection of the batch of batteries waiting to be detected.

[0013] As one possible embodiment, specifically, when the instantaneous current is greater than the preset current threshold, the processor is used to determine that the battery to be detected is a product with abnormal self-discharge, and when the instantaneous current is less than or equal to the preset current threshold, the processor is used to determine that the battery to be detected is a product with normal self-discharge.

[0014] In this application, when the instantaneous current is greater than the preset current threshold, it can be determined that the battery to be detected is a product with abnormal self-discharge, and when the instantaneous current is less than or equal to the preset current threshold, it can be determined that the battery to be detected is a product with normal self-discharge, thus realizing an accurate determination of the self-discharge performance of the battery.

[0015] As one possible embodiment, the detection device further includes a transfer device, the transfer device is connected to the processor, and when the processor determines that the battery to be detected is a product with abnormal self-discharge, the processor is used to control the transfer device to transfer the battery to be detected to the first position, and when the processor determines that the battery to be detected is a product with normal self-discharge, the processor is used to control the transfer device to transfer the battery to be detected to the second position.

[0016] In this application, after the detection result of the battery to be detected is determined, based on different detection results, the battery to be detected can be transferred to different positions to realize further processing of the detected battery.

[0017] In a second aspect, this application provides a battery detection method including steps of measuring the open-circuit voltage of a battery to be detected, inputting a test voltage to the battery to be detected after the battery to be detected is left standing for a preset time, where the test voltage is the same as the open-circuit voltage, measuring the instantaneous current of the battery to be detected after the test voltage is input, and determining the self-discharge characteristic of the battery to be detected based on the instantaneous current and a preset current threshold.

[0018] In this application, compared with the prior art, the detection principle of the constant voltage method is still adopted. The difference from the existing constant voltage method is that after the test voltage is input, the instantaneous current of the battery waiting for detection is measured, so that the measurement of the battery can be carried out immediately without waiting for a long time. Therefore, the detection efficiency can be greatly improved, and the detection time and the cost of the equipment (detection equipment) can be saved. Also, before the test voltage is input, the battery waiting for detection needs to be static for a preset time. During this static time, the detection of other batteries waiting for detection can be continued. For example, the open circuit voltage of other batteries waiting for detection can be measured. Furthermore, by this detection method, a batch of batteries can be detected. Therefore, this detection method can reduce the detection cost of the battery and improve the detection efficiency of the battery, and the applicability of this detection method is high.

[0019] As one possible embodiment, the step of determining the self-discharge performance of the battery waiting for detection based on the instantaneous current and a preset current threshold includes: when the instantaneous current is greater than the preset current threshold, determining that the battery waiting for detection is a product with abnormal self-discharge; and when the instantaneous current is less than or equal to the preset current threshold, determining that the battery waiting for detection is a product with normal self-discharge.

[0020] In this application, when the instantaneous current is greater than the preset current threshold, it can be determined that the battery waiting for detection is a product with abnormal self-discharge; when the instantaneous current is less than or equal to the preset current threshold, it can be determined that the battery waiting for detection is a product with normal self-discharge, and an accurate determination of the self-discharge performance of the battery is realized.

[0021] As one possible embodiment, the detection method further includes: when it is determined that the battery waiting for detection is a product with abnormal self-discharge, transferring the battery waiting for detection to the first position; and when it is determined that the battery waiting for detection is a product with normal self-discharge, transferring the battery waiting for detection to the second position.

[0022] In this application, after the detection result of the battery waiting to be detected is determined, based on different detection results, the battery waiting to be detected can be transferred to different positions to realize further processing of the battery waiting to be detected.

[0023] As one possible implementation, this detection method is applied to the battery detection device described in any possible implementation of the first aspect and the first aspect.

[0024] In this application, through the combined application of the battery detection device and the battery detection method, the detection cost of the battery is reduced, the detection efficiency of the battery is improved, and the applicability of the battery detection device and the battery detection method is high.

[0025] In the third aspect, this application provides a battery detection device including each functional module for realizing the battery detection method described in any possible implementation of the second aspect and the second aspect.

[0026] In the fourth aspect, this application provides a readable storage medium in which a computer program is stored, and when the computer program is executed by a computer, it executes the battery detection method described in any possible implementation of the second aspect and the second aspect.

Brief Description of the Drawings

[0027] To more clearly explain the technical solutions in the embodiments of this application, the drawings necessary for the embodiments of this application are briefly introduced below. Obviously, the drawings described below are only some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0028]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0029] In the drawings, the drawings are not necessarily drawn to actual scale.

Modes for Carrying Out the Invention

[0030] Hereinafter, embodiments of the present application will be described in more detail with reference to the drawings and examples. The following detailed description of the examples and the accompanying drawings are used to exemplarily explain the principle of the present application, but cannot be used to limit the scope of the present application. That is, the present application is not limited to the described embodiments.

[0031] In the description of the present application, unless otherwise specified, "a plurality" means two or more, and the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer" are for the purpose of easily explaining the present application and simplifying the description, but it should be explained that the shown device or element does not have to have a specific orientation and does not have to be configured and operated in a specific orientation, and thus should not be understood as limiting the present application. Also, terms such as "first", "second", "third" are only for the purpose of explanation and should not be understood as indicating or implying relative importance. "Vertical" includes not only vertical in a strict sense but also an allowable range of error. "Parallel" includes not only parallel in a strict sense but also an allowable range of error.

[0032] The terms indicating directions appearing in the following description all refer to the directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, unless specifically defined and limited, terms such as "attachment", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, an integral connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in the present application according to specific situations.

[0033] Due to the self-discharge of the battery cell, failure phenomena such as the voltage of the battery during storage being too low or the voltage becoming zero occur. In the process of battery grouping, if the consistency of the self-discharge of battery cells in the same batch is low, safety problems such as overcharging and over-discharging will occur, and ultimately the service life of the battery module will be shortened. Therefore, the self-discharge performance of the battery is one of the factors determining the quality of the battery. Furthermore, the detection of self-discharge performance has become one of the detection tasks for battery quality detection.

[0034] The applicant of the present application analyzed the existing battery detection methods and found that in the constant voltage detection method, after the constant voltage source is connected, it is necessary to wait until the charging current of the battery stabilizes and then collect the stable charging current. As a result, the detection device channel is occupied for a long time, and the detection efficiency is further reduced.

[0035] From the above problems, the applicant of the present application found through research that when using the detection principle of the constant voltage method, even if a stable charging current is not collected, it is not necessary to wait until the charging current of the battery stabilizes, that is, by measuring the instantaneous current of the battery, the long-term occupation of the detection device channel can be reduced.

[0036] To enable the instantaneous current to reflect the self-discharge performance of the battery, the open-circuit voltage of the battery can be tested first. However, due to the self-discharge of the battery, when the preset time elapses, the voltage of the battery will be lower than the open-circuit voltage. After reconnecting the same test voltage as the open-circuit voltage, there is a corresponding relationship between the instantaneous current generated at this time and the instantaneous voltage difference. Therefore, the instantaneous current can reflect the self-discharge performance of the battery. By this method, not only can the detection of the self-discharge performance be realized, but also the long-term occupation of the detection device channel can be avoided.

[0037] Based on the principle of the above technical solution, the applicant further studied and found that after the open-circuit voltage of the battery is measured, there is a waiting period of a preset time in the middle, and the battery can be static during this waiting period. When the currently measured battery is static, the member for measuring the open-circuit voltage is in an idle state, and the measurement of the open-circuit voltage of the next battery that requires measurement can be continued using the idle period. Therefore, by this detection method, a batch of batteries can also be detected, so that the test efficiency can be greatly improved, and the test time and detection device cost can be greatly saved.

[0038] The technical solution provided by the embodiments of the present application can be applied to various application scenarios where it is necessary to test the self-discharge performance of the battery, and can not only test the self-discharge performance of a small number of batteries, but also test the self-discharge performance of a large number of batteries.

[0039] The technical solution provided by the embodiments of the present application includes a battery detection method and a battery detection device, and the battery detection method can be applied to the battery detection device. That is, the battery detection device is used as the hardware execution environment of the battery detection method, and the battery detection method can also be applied to other battery detection devices. Therefore, in order to facilitate the understanding of the technical solution provided by the embodiments of the present application, in the following embodiments, the battery detection method will be introduced first, and then the battery detection device will be described.

[0040] Referring to FIG. 1, FIG. 1 is a flowchart of a battery detection method provided by an embodiment of the present application. This detection method includes the following steps:

[0041] In step 110, measure the open-circuit voltage of the battery to be detected.

[0042] In step 120, after the battery to be detected is left standing for a preset time, input a test voltage to the battery to be detected. The test voltage is the same as the open-circuit voltage.

[0043] In step 130, measure the instantaneous current of the battery to be detected after the test voltage is input.

[0044] In step 140, based on the instantaneous current and a preset current threshold, determine the self-discharge performance of the battery to be detected.

[0045] In the embodiment of the present application, the detection principle of the constant voltage method is adopted. The difference from the existing constant voltage method is that after the test voltage is input, the instantaneous current of the battery to be detected is measured. Since the battery measurement can be performed immediately without waiting for a long time, the detection efficiency can be greatly improved, and the detection time and equipment (detection equipment) cost can be saved. Also, before the test voltage is input, the battery to be detected needs to be left standing for a preset time. During this standing time, the detection of other batteries to be detected can be continued. For example, the open-circuit voltage of other batteries to be detected can be measured. Furthermore, with this detection method, a batch of batteries can be detected. Therefore, this detection method can reduce the battery detection cost and improve the battery detection efficiency, and the applicability of this detection method is high.

[0046] Next, a detailed embodiment of this detection method will be described.

[0047] In step 110, first measure the open-circuit voltage of the battery waiting to be detected. It can be understood that the terminal voltage of a battery in an open-circuit state is called the open-circuit voltage. The open-circuit voltage of a battery is equal to the difference between the positive electrode potential and the negative electrode potential of the battery when the battery is disconnected (i.e., when no current is flowing through the two electrodes).

[0048] Therefore, when measuring the open-circuit voltage, first disconnect the battery waiting to be detected, and then directly measure the voltage between the positive and negative electrodes of the voltage waiting to be measured, that is, the open-circuit voltage.

[0049] The measurement of the open-circuit voltage may be realized by a voltmeter. In actual applications, the two measurement ports of the voltmeter can be drawn out. When measurement is required, if the positive and negative electrodes of the battery waiting to be detected are directly connected corresponding to the two measurement ports, an effective measurement of the open-circuit voltage of the battery waiting to be detected can be realized.

[0050] After the open-circuit voltage of the battery is measured in step 110, first let the battery waiting to be detected stand still. After the standing time reaches the preset time, input the same test voltage as the open-circuit voltage to the battery waiting to be detected in step 120.

[0051] Here, the preset time may be set according to the needs of the actual operating conditions of the battery. Generally speaking, if the battery needs to leak a lot of electricity, the preset time can be set longer to ensure sufficient leakage. If the battery needs to leak less electricity, even if the preset time is set shorter, sufficient leakage can still be ensured.

[0052] In addition to being set based on the amount of electricity leaked, this time may also be set in combination with the actual disclosure of the battery such as the capacity and maximum potential of the battery, and is not limited to the embodiments of the present application.

[0053] As an example, the preset time may be set within the range of 10 minutes to 6 hours.

[0054] In step 120, the battery waiting to be detected can be connected to a voltage source with the same voltage as the open-circuit voltage, and an input of a test voltage identical to the open-circuit voltage can be realized.

[0055] After the test voltage is input in step 120, a current corresponding to both poles of the battery waiting to be detected flows. At this time, step 130 is executed, and the instantaneous current of the battery waiting to be detected after the test voltage is input can be measured.

[0056] Regarding the instantaneous current, after a test voltage is input to the battery waiting to be detected, the battery waiting to be detected is immediately connected to an ammeter. After the connection is established, the instantaneous value measured by the ammeter is taken as the instantaneous current.

[0057] Due to the self-discharge of the battery, after a preset time has elapsed, the voltage of the battery is lower than the open-circuit voltage. After reconnecting to the same test voltage as the open-circuit voltage, the instantaneous current generated at this time corresponds to the instantaneous voltage difference. Therefore, it can be understood that the instantaneous current can reflect the self-discharge performance of the battery.

[0058] Furthermore, after the instantaneous current is measured in step 130, in step 140, based on the instantaneous current and a preset current threshold, the self-discharge performance of the battery waiting to be detected is determined.

[0059] Here, the preset current threshold may be set according to a previous test. As one selectable embodiment, the above steps 110 - 130 are performed on a batch of batteries with normal self-discharge performance, the distribution of the instantaneous current (i) of the batteries is tested, and a compensation current threshold imax corresponding to the batteries with normal self-discharge is calculated from this distribution. This compensation current threshold imax can be determined as the preset current threshold.

[0060] For example, the value of imax may be a value of μ+(3 to 6)δ or more, and the specific value may be set according to the actual block needs of defective products (the block needs of batteries with abnormal self-discharge performance). Here, μ and δ represent the average value of the i value and the standard deviation of the i value calculated from the normal distribution of the i values of a batch of batteries, respectively.

[0061] In addition to the above setting method, the preset current threshold value may be set by other methods. For example, there are settings based on a large amount of empirical data, settings according to the needs of some manufacturers, etc., which are not limited to the embodiments of this application.

[0062] Based on the preset current threshold value, as an optional embodiment, step 140 includes determining that the battery to be detected is a product with abnormal self-discharge when the instantaneous current is greater than the preset current threshold value, and determining that the battery to be detected is a product with normal self-discharge when the instantaneous current is less than or equal to the preset current threshold value.

[0063] In this embodiment, when the instantaneous current is greater than the preset current threshold value, it can be determined that the battery to be detected is a product with abnormal self-discharge, and when the instantaneous current is less than or equal to the preset current threshold value, it can be determined that the battery to be detected is a product with normal self-discharge, realizing an accurate determination of the self-discharge performance of the battery.

[0064] From the introduction of the embodiments of steps 110 - 140, it can be seen that in the entire detection process of the battery, it is necessary to let the battery to be detected stand still for a certain period of time. Based on such a detection method, this detection method can be applied to batch battery detection.

[0065] For example, assuming that the batteries awaiting detection include battery 1, battery 2, battery 3, and more batteries, after the measurement of the open-circuit voltage of battery 1 is completed, battery 1 is left stationary. At this time, the open-circuit voltage of battery 2 can be measured. Next, battery 2 is left stationary. Battery 1 and battery 2 may each be left stationary. Next, the measurement of the open-circuit voltage of battery 3 is continued, and after the measurement, battery 3 is left stationary. Since the start times of leaving battery 1, battery 2, and battery 3 stationary are different, after the stationary state of battery 1 ends, a test voltage is input thereto, and the instantaneous current is measured. Next, this process is sequentially performed for battery 2 and battery 3. Also, when measuring the instantaneous current for battery 1, battery 2, and battery 3 respectively, the measurement of the open-circuit voltage of other batteries can also be performed simultaneously, and these processes do not interfere with each other.

[0066] Also, throughout the process, the measurement of the batteries is performed immediately, and the stationary times of each battery do not affect each other. Therefore, by this detection method, a batch of batteries can be efficiently detected.

[0067] Although a batch of batteries can be detected by this detection method, since the time points of measuring the open circuit of the batch of batteries, inputting the test voltage, and measuring the instantaneous current are separated, in order to avoid data confusion, an identifier corresponding to the measured open-circuit voltage and instantaneous current can also be added.

[0068] Therefore, as one selectable embodiment, after the open-circuit voltage of the battery awaiting detection is measured in step 110, it is associated with the identifier corresponding to the battery awaiting detection. For example, assuming that the current battery awaiting detection is battery 1, the identifier of the battery awaiting detection may be the number of battery 1. Further, in step 120, when the battery for which it is necessary to input the test voltage is connected, first, the identifier of the battery is identified, and then the open-circuit voltage corresponding to the identifier of the battery is used as the test voltage.

[0069] Also, after the instantaneous current is measured in step 130, associate it with the identifier corresponding to the battery waiting to be detected. Further, in step 140, when determining the self-discharge performance of the battery, associate the determined self-discharge performance with the battery corresponding to the battery identifier corresponding to the instantaneous current.

[0070] In the embodiments of the present application, when this detection method is applied to application scenarios such as battery manufacturing factories, after the self-discharge performance of the battery is determined, further processing can be directly performed on the battery.

[0071] Therefore, as an optional embodiment, when this detection method determines that the battery waiting to be detected is a self-discharge abnormal product, this detection method further includes the step of transferring the battery waiting to be detected to the first position, and when determining that the battery waiting to be detected is a self-discharge normal product, the step of transferring the battery waiting to be detected to the second position.

[0072] In this embodiment, the first position may be a preset placement position for self-discharge abnormal products, and the second position may be a preset placement position for self-discharge normal products.

[0073] In some embodiments, the step of transferring the battery waiting to be detected to the first position includes the step of transferring the battery waiting to be detected to the first position by a battery transfer device. Also, the step of transferring the battery waiting to be detected to the second position includes the step of transferring the battery waiting to be detected to the second position by a battery transfer device.

[0074] Here, the battery transfer device may be a device capable of realizing the movement of the position of the battery, such as a robotic arm or a conveyor belt, and is not limited to the embodiments of the present application. Based on embodiments such as the battery transfer device, first generate a control command for the battery transfer device based on the detection result, and then send the control command to the battery transfer device, whereby the battery transfer device realizes the transfer of the battery to the corresponding position according to the control command.

[0075] In the embodiments of the present application, after the detection result of the battery to be detected is determined, based on different detection results, the battery to be detected can be transferred to the corresponding position to realize further processing of the battery to be detected.

[0076] As described in the above embodiments, the battery detection method may be realized by a corresponding battery detection device. Therefore, in the embodiments of the present application, a battery detection device available for realizing the battery detection method is also provided.

[0077] Next, referring to FIG. 2, it is a schematic structural diagram of a first battery detection device 200 provided by an embodiment of the present application. This first detection device 200 may be understood as a hardware environment corresponding to the battery detection method, and includes a voltage measurement module 210, a processor 220, a constant voltage source 230, and a current measurement module 240.

[0078] The voltage measurement module 210 is connected to the battery to be detected and is used to measure the open-circuit voltage of the battery to be detected.

[0079] The processor 220 is connected to the voltage measurement module 210 and is used to obtain the open-circuit voltage measured by the voltage measurement module 210.

[0080] The constant voltage source 230 is connected to the processor 220 and is used to input a test voltage same as the open-circuit voltage to the battery to be detected under the control of the processor 220 after the battery to be detected is left standing for a preset time.

[0081] The current measurement module 240 is connected to the battery to be detected and is used to measure the instantaneous current of the battery to be detected after the test voltage to be waited for is input.

[0082] The processor 220 is further connected to a current measurement module 240, and is used to obtain the instantaneous current measured by the current measurement module 240 and determine the self-discharge characteristics of the battery waiting to be detected based on the instantaneous current and a preset current threshold.

[0083] Each of the above-described connection relationships may be an electrical connection or a communication connection. The specific connection method may be selected in combination according to the actual application scenario and is not limited to the embodiments of the present application.

[0084] The processor 220 may be an integrated circuit chip having signal processing capabilities. The processor 220 may be a general-purpose processor, or may be a CPU (Central Processing Unit), an NP (Network Processor), etc., or may be a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The general-purpose processor may be a microprocessor, or this processor 220 may be any conventional processor or the like.

[0085] The constant voltage source 230 may be a conventional voltage source such as a DC power supply. The size of the voltage source corresponding to the constant voltage source 230 needs to correspond to the open circuit voltage of the battery waiting to be detected. After the processor 220 obtains the open circuit voltage, the test voltage provided by the constant voltage source 230 can be controlled.

[0086] In some embodiments, the constant voltage source 230 can switch different voltage sources and switches the corresponding voltage source based on the control instruction of the processor 220.

[0087] In some other embodiments, the constant voltage source 230 can include voltage sources of different sizes, and after the processor 220 obtains the open circuit voltage, the voltage source corresponding to the open circuit voltage can be selected as the input voltage source of the test voltage.

[0088] In the embodiments of the present application, the detection principle of the constant voltage method is adopted. The difference from the existing constant voltage method is that after the corresponding voltage is input by the constant voltage source 230, the instantaneous current of the battery waiting for detection is measured. In order to perform the measurement of the battery immediately without waiting for a long time, the detection efficiency can be greatly improved, and the detection time and the cost of the equipment (detection equipment) can be saved. Also, before the corresponding voltage is input by the constant voltage source 230, the battery waiting for detection needs to be statically placed for a preset time. During this static placement time, this detection device continues to be connected to other batteries waiting for detection and detects other batteries waiting for detection. For example, the open circuit voltage of other batteries waiting for detection can be measured. Furthermore, this detection device can detect a batch of batteries. Therefore, this detection device can reduce the detection cost of the battery and improve the detection efficiency of the battery, and the applicability of this detection device is high.

[0089] The function of the voltage measurement module 210 is to realize the measurement of voltage. As one selectable embodiment, the voltage measurement module 210 includes a voltmeter, a first switch, and a first battery connection terminal.

[0090] Here, one end of the first switch is connected to one end of the voltmeter, the other end of the first switch is connected to one end of the first battery connection terminal, the battery waiting for detection is connected to the voltage measurement module 210 through the first battery connection terminal, the other end of the voltmeter is connected to the other end of the first battery connection terminal, the voltmeter is connected to the processor 220, and when the battery waiting for detection is connected to the voltage measurement module 210 through the first battery connection terminal, the first switch is closed, and the voltmeter measures the open circuit voltage of the battery waiting for detection.

[0091] In addition to the above embodiments, the voltage measurement module 210 can also adopt other embodiments. For example, the above voltage meter may be implemented by other voltage acquisition modules and is not limited to the embodiments of the present application.

[0092] In this embodiment, the voltage measurement module 210 includes a voltmeter, a first switch, and a first battery connection terminal. The first switch and the first battery connection terminal can be used to connect and disconnect the battery to be detected, and the voltmeter can effectively measure the open-circuit voltage of the connected battery to be detected.

[0093] The function of the current measurement module 240 is to measure the instantaneous current. As an alternative embodiment, the current measurement module 240 includes an ammeter, a second switch, and a second battery connection terminal.

[0094] Here, one end of the ammeter is connected to the processor 220, the other end of the ammeter is connected to one end of the second switch, the other end of the second switch is connected to the second battery connection terminal, and the battery to be detected is connected to the current measurement module 240 through the second battery connection terminal. When the battery to be detected is connected to the current measurement module 240 through the second battery connection terminal, the second switch is closed, and the ammeter measures the instantaneous current of the battery to be detected.

[0095] In addition to the above embodiments, the current measurement module 240 can also adopt other embodiments. For example, the above ammeter may be implemented by other current acquisition modules and is not limited to the embodiments of the present application.

[0096] In this embodiment, the current measurement module 240 includes an ammeter, a second switch, and a second battery connection terminal. The second switch and the second battery connection terminal can be used to connect and disconnect the battery to be detected, and the ammeter can effectively and quickly measure the instantaneous current of the connected battery to be detected.

[0097] From the description of the embodiment of the first detection device 200, it can be seen that in the entire battery detection process, it is necessary to leave the battery to be detected stationary for a certain period of time. Based on such a detection method, this first detection device 200 can be applied to batch battery detection.

[0098] For example, assuming that the batteries to be detected include battery 1, battery 2, battery 3 and more batteries, after the voltage measurement module 210 completes the measurement of the open-circuit voltage of battery 1, battery 1 is disconnected from the voltage measurement module 210 and left stationary. At this time, the voltage measurement module 210 is used to continue connecting to battery 2, measure the open-circuit voltage of battery 2, and then battery 2 is disconnected from the voltage measurement module 210 and left stationary. Battery 1 and battery 2 may be left stationary respectively. Next, the voltage measurement module 210 continues to connect to battery 3 and measures the open-circuit voltage of battery 3. After the measurement of battery 3 is completed, it is left stationary. Since the stationary start times of battery 1, battery 2 and battery 3 are different, after the stationary state of battery 1 ends, the processor 220 controls the constant voltage source 230 to input a test voltage to battery 1, measures the instantaneous current using a current measurement device, and then performs this process on battery 2 and battery 3 sequentially. Also, when measuring the instantaneous current for battery 1, battery 2, and battery 3 respectively, the measurement of the open-circuit voltage of other batteries can also be measured simultaneously without these processes conflicting.

[0099] Also, throughout the process, the measurement of the battery is performed immediately, and the stationary times of each battery do not affect each other. Therefore, with this first detection device 200, batch batteries can be detected efficiently.

[0100] Although this detection device can detect batch batteries, since the time points of the open-circuit measurement, test voltage input, and instantaneous current measurement of batch batteries are separated, in order to avoid data confusion, it is also possible to add identifiers corresponding to the measured open-circuit voltage and instantaneous current.

[0101] Therefore, as one selectable embodiment, referring to FIG. 3, the first detection device 200 further includes a battery scanning module including a first battery scanning module 250 and a second battery scanning module 260. The first battery scanning module 250 is connected to the voltage measurement module 210, the second battery scanning module 260 is connected to the current measurement module 240, and the processor 220 is connected to the first battery scanning module 250 and the second battery scanning module 260 respectively.

[0102] For the first battery scanning module 250, when the battery to be detected is connected to the voltage measurement module 210, determine the identifier of the battery to be detected and send it to the processor 220. The processor 220 obtains the open circuit voltage corresponding to the identifier of the battery to be detected, and further controls the constant voltage source 230 to input the test voltage corresponding to the identifier of the battery to be detected to the battery to be detected when the test voltage is input.

[0103] For the second battery scanning module 260, when the battery to be detected is connected to the current measurement module 240, determine the identifier of the battery to be detected and send it to the processor 220. The processor 220 obtains the instantaneous current corresponding to the identifier of the battery to be detected, and further determines the self-discharge characteristic of the battery to be detected based on the instantaneous current corresponding to the identifier of the battery to be detected and a preset current threshold.

[0104] Here, the first battery scanning module 250 and the second battery scanning module 260 may be battery code scanning units. Correspondingly, a scanning pattern such as a corresponding barcode or two-dimensional code is set for the battery to be detected. These scanning patterns correspond to the identifier (for example, number) of the battery to be detected, and the battery scanning unit can determine the identifier of the battery to be detected by scanning the scanning pattern on the battery to be detected. For example, the battery scanning unit can correspond to a two-dimensional code scanning device, a barcode scanning device, etc.

[0105] After the processor 220 obtains the identifier of the battery scanned by the first battery scanning module 250 or the second battery scanning module 260, since it can be understood that it may not be used immediately, the processor 220 further has a function of storing the identifier of the battery so as to associate the identifier of the battery with the corresponding parameter at any time.

[0106] In this embodiment, the open circuit voltage of the battery to be detected can be associated with the identifier by the first battery scanning module 250. Further, the processor 220 can control the constant voltage source 230 to input a test voltage corresponding to the identifier. The second battery scanning module 260 can associate the instantaneous current of the battery to be detected with the identifier. Further, the processor 220 can determine the self-discharge characteristic of the battery based on the instantaneous current corresponding to the identifier. Further, when this detection device detects a batch of batteries to be detected, the open circuit voltage and the instantaneous current corresponding to each battery to be detected can be effectively distinguished (identified), and effective detection of the batch of batteries to be detected can be realized.

[0107] Furthermore, in combination with the description of the battery detection method, when the processor 220 determines the self-discharge performance, if the instantaneous current is greater than a preset current threshold, it is determined that the battery to be detected is a product with abnormal self-discharge. If the instantaneous current is less than or equal to the preset current threshold, it is determined that the battery to be detected is a product with normal self-discharge.

[0108] Here, for the embodiment of the preset current threshold, refer to the description of the above embodiment, and the description will not be repeated here.

[0109] In the embodiment of the present application, if the instantaneous current is greater than a preset current threshold, it can be determined that the battery to be detected is a product with abnormal self-discharge. If the instantaneous current is less than or equal to the preset current threshold, it can be determined that the battery to be detected is a product with normal self-discharge, and accurate determination of the self-discharge performance of the battery is realized.

[0110] When combined with the description of the above embodiments, the first detection device 200 may further include a transfer device, and the transfer device is connected to the processor 220. When the processor 220 determines that the battery waiting to be detected is a product with abnormal self-discharge, the transfer device is controlled to transfer the battery waiting to be detected to the first position. When the processor 220 determines that the battery waiting to be detected is a product with normal self-discharge, the transfer device is controlled to transfer the battery waiting to be detected to the second position.

[0111] Here, for the embodiments of the transfer device and the embodiments of the control, refer to the description of the above embodiments, and the description will not be repeated here.

[0112] In the embodiments of the present application, after the detection result of the battery waiting to be detected is determined, based on different detection results, the battery waiting to be detected can be transferred to different positions to realize further processing of the detected battery.

[0113] Combined with the description of the embodiments of each module above, next, referring to FIG. 4, which is a schematic structural diagram when actually applied to the first detection device 200 provided by the embodiments of the present application. In FIG. 4, module 1 corresponds to the voltage measurement module 210, module 2 corresponds to the current measurement module 240, the battery code scanning unit corresponds to the battery scanning module, port 3 corresponds to the above first battery connection terminal, port 1 corresponds to the above second battery connection terminal, and port 2 may be understood as the battery connection terminal of the battery scanning module corresponding to the current measurement module 240. The DC power supply corresponds to the constant voltage source 230.

[0114] According to the structure shown in FIG. 4, when performing battery detection, the processor 220 controls the connection between each port and the battery waiting to be detected and the ports, controls the closing and disconnection of each switch, controls the on and off of the constant voltage source 230, stores and processes the acquired data, and determines the final self-discharge performance detection result.

[0115] Based on the same inventive concept, referring to FIG. 5, in an embodiment of the present application, a second detection device 500 for a battery is also provided. The second detection device 500 may be understood as a virtual device corresponding to the above battery detection method. The second detection device includes a measurement module 510 and a processing module 520.

[0116] The measurement module 510 is used to measure the open circuit voltage of the battery to be detected. The processing module 520 is used to input a test voltage to the battery to be detected after the battery to be detected has been static for a preset time. The test voltage is the same as the open circuit voltage. The measurement module 510 is further used to measure the instantaneous current of the battery to be detected after the test voltage is input. The processing module 520 is further used to determine the self-discharge performance of the battery to be detected based on the instantaneous current and a preset current threshold.

[0117] In an embodiment of the present application, specifically, when the instantaneous current is greater than the preset current threshold, the processing module 520 determines that the battery to be detected is a product with abnormal self-discharge. When the instantaneous current is less than or equal to the preset current threshold, the processing module 520 is used to determine that the battery to be detected is a product with normal self-discharge.

[0118] In an embodiment of the present application, when the processing module 520 further determines that the battery to be detected is a product with abnormal self-discharge, the processing module 520 is used to transfer the battery to be detected to the first position. When it is determined that the battery to be detected is a product with normal self-discharge, the processing module 520 is used to transfer the battery to be detected to the second position.

[0119] The second detection device 500 corresponds to the battery detection method, and each functional module corresponds to each step of the method. Therefore, for the embodiments of each functional module, refer to the embodiments of each step, and the description will not be repeated here.

[0120] Based on the same inventive concept, an embodiment of the present application provides a readable storage medium in which a computer program is stored, and when the computer program is executed by a computer, the battery detection method described in the above embodiment is executed.

[0121] The present application has been described with reference to the preferred embodiments, but various changes can be made without departing from the scope of the present application, and some of them can be replaced with equivalents. In particular, each technical feature described in each embodiment can be combined in any manner as long as there is no structural contradiction. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Description of Reference Numerals

[0122] 200 - First detection device; 210 - Voltage measurement module; 220 - Processor; 230 - Constant voltage source; 240 - Current measurement module; 250 - First battery scanning module; 260 - Second battery scanning module; 500 - Second detection device; 510 - Measurement module; 520 - Processing module.

Claims

1. A battery inspection device, comprising: a voltage measurement module connected to a battery under test for measuring an open circuit voltage of the battery under test; a processor connected to the voltage measurement module for acquiring the open circuit voltage; a constant voltage source connected to the processor, used for inputting a test voltage controlled by the processor to the battery under test having a voltage lower than the open circuit voltage after the battery under test with the measured open circuit voltage is left standing for a preset time, wherein the test voltage is the same as the open circuit voltage; a current measurement module connected to the battery under test for measuring an instantaneous current of the battery under test after the test voltage is input; The processor is further connected to the current measurement module, acquires the instantaneous current, and is used for determining a self-discharge characteristic of the battery under test based on the instantaneous current and a preset current threshold. The battery inspection device is characterized by the above.

2. The voltage measurement module includes a voltmeter, a first switch, and a first battery connection terminal. One end of the first switch is connected to one end of the voltmeter, the other end of the first switch is connected to one end of the first battery connection terminal, the battery under test is connected to the voltage measurement module through the first battery connection terminal, the other end of the voltmeter is connected to the other end of the first battery connection terminal, and the voltmeter is connected to the processor. When the battery under test is connected to the voltage measurement module through the first battery connection terminal, the first switch is closed, and the voltmeter measures the open circuit voltage of the battery under test. The inspection device according to claim 1 is characterized by the above.

3. The current measurement module includes an ammeter, a second switch, and a second battery connection terminal. One end of the ammeter is connected to the processor, the other end of the ammeter is connected to one end of the second switch, the other end of the second switch is connected to the second battery connection terminal, and the battery under test is connected to the current measurement module through the second battery connection terminal. When the battery under test is connected to the current measurement module through the second battery connection terminal, the second switch is closed, and the ammeter measures the instantaneous current of the battery under test. The inspection device according to claim 1 is characterized by the above.

4. The inspection device further includes a battery scanning module including a first battery scanning module connected to the voltage measurement module and a second battery scanning module connected to the current measurement module, and both the first battery scanning module and the second battery scanning module are connected to the processor. The first battery scanning module is used to determine the identifier of the battery under test and transmit it to the processor when the battery under test is connected to the voltage measurement module. Specifically, the processor is used to obtain the open circuit voltage corresponding to the identifier of the battery under test and control the constant voltage source to input the test voltage corresponding to the identifier of the battery under test to the battery under test. The second battery scanning module is used to determine the identifier of the battery under test and transmit it to the processor when the battery under test is connected to the current measurement module. Specifically, the processor is used to obtain the instantaneous current corresponding to the identifier of the battery under test and determine the self-discharge characteristic of the battery under test based on the instantaneous current corresponding to the identifier of the battery under test and a preset current threshold. The inspection device according to claim 1, characterized in that it is used.

5. Specifically, the processor When the instantaneous current is greater than the preset current threshold, it is determined that the battery under test is a product with abnormal self-discharge. When the instantaneous current is less than or equal to the preset current threshold, it is used to determine that the battery under test is a product with normal self-discharge. The inspection device according to any one of claims 1-4, characterized in that it is used.

6. The inspection device further includes a transfer device, the transfer device is connected to the processor, and the processor further When it is determined that the battery under test is a product with abnormal self-discharge, the transfer device is controlled to transfer the battery under test to the first position. When it is determined that the battery under test is a product with normal self-discharge, it is used to control the transfer device to transfer the battery under test to the second position. The inspection device according to claim 5, characterized in that it is used.

7. A method for inspecting a battery, comprising: Measuring the open circuit voltage of the battery under test; A step of inputting a test voltage to the battery under test having a voltage lower than the open-circuit voltage after leaving the battery under test, for which the open-circuit voltage has been measured, stand for a preset time, wherein the test voltage is the same as the open-circuit voltage, A step of measuring the instantaneous current of the battery under test after the test voltage has been input, A step of determining the self-discharge performance of the battery under test based on the instantaneous current and a preset current threshold, characterized in that the battery inspection method includes these steps.

8. The step of determining the self-discharge performance of the battery under test based on the instantaneous current and a preset current threshold is as follows: When the instantaneous current is greater than the preset current threshold, determining that the battery under test is a product with abnormal self-discharge, When the instantaneous current is less than or equal to the preset current threshold, determining that the battery under test is a product with normal self-discharge, characterized in that the inspection method according to claim 7 includes these steps.

9. The inspection method is as follows: When it is determined that the battery under test is a product with abnormal self-discharge, a step of transferring the battery under test to a first position, When it is determined that the battery under test is a product with normal self-discharge, a step of transferring the battery under test to a second position, characterized in that the inspection method according to claim 8 further includes these steps.

10. The inspection method is characterized in that it is applied to the battery inspection device according to any one of claims 1-6, and is the battery inspection method according to any one of claims 7-9.

11. A battery inspection device, A measurement module for measuring the open-circuit voltage of the battery under test, After leaving the battery under test, for which the open-circuit voltage has been measured, stand for a preset time, it is used to input a test voltage to the battery under test having a voltage lower than the open-circuit voltage, wherein the test voltage is the same as the open-circuit voltage, and includes a processing module, The measurement module is further used to measure the instantaneous current of the battery under test after the test voltage has been input, The processing module is further used to determine the self-discharge performance of the battery under test based on the instantaneous current and a preset current threshold, characterized in that the battery inspection device has these features.

12. Specifically, the processing module is When the instantaneous current is greater than the preset current threshold value, it is determined that the battery under test is a product with abnormal self-discharge. The inspection apparatus according to claim 11, characterized in that when the instantaneous current is equal to or less than the preset current threshold value, it is used to determine that the battery under test is a product with normal self-discharge. **Claim 13** The processing module further When it is determined that the battery under test is a product with abnormal self-discharge, the battery under test is transferred to the first position. The inspection apparatus according to claim 12, characterized in that when it is determined that the battery under test is a product with normal self-discharge, it is used to transfer the battery under test to the second position. **Claim 14** A readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the battery inspection method according to any one of claims 7-9 is executed.

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