Storage battery health degree monitoring method and storage battery health degree monitor

Abstract

The invention relates to a storage battery health degree monitoring method and a storage battery health degree monitor. According to the method, the operation state of the storage battery can be correspondingly determined by continuously acquiring the battery operation data of the storage battery according to the battery operation data of the storage battery, and under the condition that the storage battery is in a stable discharge state, the discharge time required for air defense of the storage battery can be determined according to the battery operation data of a preset time length; and then the health degree of the storage battery can be determined according to the discharge time and the specification parameters of the storage battery, so that a worker can evaluate the performance parameters of the storage battery in the aspects of the residual life, the working efficiency, the suitability degree of the currently matched load and the like through the health degree of the storage battery, and the effective management of the storage battery is realized.

Description

Technical Field

[0001] The present application relates to the technical field of battery health monitoring, and in particular to a battery health monitoring method and a battery health monitoring instrument. Background Art

[0002] The DC power supply system in power plants and substations mainly provides working power for protection and control equipment. In order to ensure the power supply reliability of the DC power supply system, batteries are used as backup power supplies, and the batteries in the DC power supply system operate in a floating charge state for a long time. In the floating charge state, the battery is connected in parallel at both ends of the charger. Under normal circumstances, the charger provides a floating charge current to the battery for supplementary charging. The floating charge current is extremely small and difficult to identify, and the floating charge voltage remains unchanged for a long time; and when the battery operates in a constant temperature environment, the temperature change of the battery is not obvious in the absence of major accidents. Therefore, it is difficult to judge the operating status of the battery based on the battery status quantity, and thus it is impossible to determine the health status of the battery. Summary of the invention

[0003] Based on this, it is necessary to provide a battery health monitoring method and a battery health monitoring instrument that can monitor the health of the battery in order to solve the above technical problems.

[0004] In a first aspect, the present application provides a battery health monitoring method, comprising:

[0005] Continuously obtain battery operation data of the battery;

[0006] Determine the operating status of the battery based on the continuously acquired battery operating data;

[0007] When the battery is in a stable discharge state, the discharge time required to discharge the battery to empty is determined according to the battery operation data of a preset time length;

[0008] Determine the health of the battery based on the discharge time and battery specifications.

[0009] In one embodiment, the battery operation data includes charge and discharge currents, and the step of determining the operation state of the battery according to the continuously acquired battery operation data includes:

[0010] Determine the charge and discharge status of the battery according to the charge and discharge current;

[0011] When the battery is in a discharging state, judging whether the battery is in a stable discharging state according to the discharge current within a preset time length and the specification parameters of the battery;

[0012] When the battery is in a floating charge state, a load is connected to the battery, and based on the discharge current within a preset time length and the specification parameters of the battery, it is determined whether the battery is in a stable discharge state;

[0013] When the storage battery is in an equalizing charging state, the equalizing charging state of the storage battery is maintained.

[0014] In one embodiment, the step of determining the discharge time required to discharge the battery to empty according to the battery operation data of a preset time length includes:

[0015] According to the battery operation data and the following formula, the first parameter, the second parameter and the third parameter are solved:

[0016] V(t)=at 2 +bt+c

[0017] Wherein, V(t) is the discharge voltage of the battery at time t, a is the first parameter, b is the second parameter, and c is the third parameter;

[0018] Based on the first parameter, second parameter, third parameter, discharge termination voltage in the specification parameters and the following formula:

[0019] V0=aT 2 +bT+c

[0020] Wherein, V0 is the discharge termination voltage, and T is the time corresponding to the discharge termination voltage;

[0021] The discharge time is determined according to the time corresponding to the discharge termination voltage.

[0022] In one embodiment, the battery health monitoring method further includes:

[0023] In response to the internal resistance detection instruction, applying a preset alternating current to the battery;

[0024] Determine the internal resistance of the battery according to the terminal voltage of the battery under a preset AC current;

[0025] The health of the battery is determined based on the internal resistance of the battery.

[0026] In a second aspect, the present application also provides a battery health monitoring device, comprising:

[0027] A discharge module, the discharge module is used to connect to the battery;

[0028] A measurement and control module, which is used to connect to the battery and continuously measure the battery operation data of the battery;

[0029] The monitoring terminal is connected to the discharge module and the measurement and control module respectively, and is used to execute any step of the above-mentioned battery health monitoring method.

[0030] In one embodiment, the discharge module comprises:

[0031] A switch tube, wherein a first end of the switch tube is used to connect to the positive electrode of the battery, a second end of the switch tube is connected to the control end of the monitoring terminal, and a third end of the switch tube is grounded;

[0032] Load, the load is connected in series to the branch of the battery grounded through the switch tube;

[0033] The monitoring terminal is also used to output a driving signal to the switch tube when the battery is in a floating charge state to trigger the switch tube to turn on.

[0034] In one of the embodiments, the monitoring terminal is further used to respond to the internal resistance detection instruction and output an AC control signal to the switch tube to periodically turn on and off the switch tube.

[0035] In one embodiment, the discharge module further includes:

[0036] A current recovery module, which is connected in series between the third terminal of the switch tube and the ground, and the output terminal of the current recovery module is connected to the feedback terminal of the monitoring terminal;

[0037] The monitoring terminal is also used to adjust the driving signal according to the recovery signal output by the current recovery module to maintain the stability of the discharge current of the battery.

[0038] In one embodiment, the load includes:

[0039] The resistance module is connected in series to the branch of the battery which is grounded through the switch tube.

[0040] In one embodiment, the discharge module further includes:

[0041] Protection module: The protection module is connected in series between the switch tube and the battery.

[0042] The above-mentioned battery health monitoring method and battery health monitor can determine the operating status of the battery by continuously acquiring and based on the battery operating data of the battery. When the battery is in a stable discharge state, the discharge time required for the battery to defend against air bursts can be determined based on the battery operating data of a preset time length; then the health of the battery can be determined based on the discharge time and the specification parameters of the battery, so that the staff can evaluate the remaining life of the battery, work efficiency, and suitability of the currently matched load and other performance parameters through the battery health, thereby achieving effective management of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A diagram showing an application environment of a battery health monitoring method in one embodiment;

[0045] Figure 2 A schematic diagram of a flow chart of a battery health monitoring method in one embodiment;

[0046] Figure 3 A battery discharge curve provided by a battery manufacturer in one embodiment;

[0047] Figure 4 is a voltage and current variation curve of a battery in a discharge state in one embodiment;

[0048] Figure 5 One of the structural block diagrams of a battery health monitor in one embodiment;

[0049] Figure 6 This is a second structural block diagram of a battery health monitor in one embodiment;

[0050] Figure 7 is a structural block diagram of a battery health monitoring device in one embodiment;

[0051] Figure 8 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] In traditional technology, the health of the battery is often judged by regularly discharging the core capacity, regularly testing the internal resistance, regularly measuring the terminal voltage, and using online monitoring equipment.

[0054] Among them, the method of regularly performing nuclear capacity discharge uses a discharge current of 0.1C to discharge a battery with a discharge capacity greater than 80%*C10, which generates large heat and has a low safety factor. When activating a battery with a discharge capacity greater than 80%*C10, the restored battery cannot be put back into the same system.

[0055] In the method of periodically testing the internal resistance, the internal resistance of each battery varies due to different manufacturers, models, batches, etc., that is, there is no fixed value or clear judgment standard for the internal resistance. And due to the differences in measuring equipment, test principles, and testers, the corresponding test results are also different. Therefore, there is no unique logical relationship between internal resistance and health.

[0056] In the periodic measurement of terminal voltage, the change of battery terminal voltage is not obvious, and it is difficult to judge the health of the battery based on the terminal voltage alone. In addition, there are few cases of discovering outdated batteries with low health through this method, and the technology is not mature enough.

[0057] In the method of judging the health of batteries through online monitoring equipment, there is no dedicated person to track and analyze the online measurement data of batteries for a long time. So far, there has been no case of poor health of outdated batteries discovered through online monitoring equipment of batteries. Moreover, in this method, the accuracy and reliability of online monitoring equipment and the professional quality of maintenance personnel are required to be high, and the corresponding cost is also high.

[0058] The battery health monitoring method provided in the embodiment of the present application can be applied to Figure 1In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the battery operation data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. The server 104 obtains multiple battery operation data from the data storage system, and determines the operating state of the battery based on these battery operation data. When the battery is in a stable discharge state, it determines the discharge time required for the battery to be discharged according to multiple battery operation data within a preset time length, and then measures the health of the battery based on this discharge time. Further, the server 104 can transmit the final determined health to the terminal 102 for the user to view and improve the visualization. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptops, smart phones, tablets, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, projection devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head mounted device may be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. The server 104 may be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0059] In an exemplary embodiment, Figure 2 As shown, a battery health monitoring method is provided, which is applied to Figure 1 The following is an example of a server in the example, including:

[0060] S202, continuously acquiring battery operation data of the battery, wherein the battery operation data includes multi-dimensional data such as charge and discharge current, terminal voltage, internal resistance, and temperature.

[0061] S204: Determine the operating state of the battery according to the continuously acquired battery operating data.

[0062] The operating status of the battery can be determined based on the changing trend of the terminal voltage in the battery operating data, the flow direction of the charging and discharging current, and other dimensions.

[0063] S206, when the storage battery is in a stable discharge state, determining the discharge time required to discharge the storage battery to zero according to the battery operation data of a preset time length.

[0064] It should be noted that discharging the battery does not mean completely discharging the battery to zero power, but discharging the battery to the discharge termination voltage, which can be determined based on the specifications provided by the battery manufacturer. Figure 3 As shown, Figure 3 The discharge time of a battery under different current conditions is given in the figure. The greater the discharge current, the shorter the discharge time and the less electrical energy generated. When the discharge current is less than 0.3C, the discharge termination voltage of the battery is uniformly 1.8V. Therefore, 1.8V can be used as the discharge termination voltage of the battery.

[0065] S208, determining the health of the battery according to the discharge time and the specification parameters of the battery.

[0066] Different health levels can be set. Exemplarily, the battery can be divided into three health levels, namely: healthy, qualified and unhealthy; correspondingly, when 80%≤k (k represents health)≤100%, the battery can be considered healthy; when 60%≤k≤80%, the battery can be considered qualified; when 0≤k≤60%, the battery can be considered unhealthy. The battery can also be divided into two health levels, namely: qualified and unhealthy; correspondingly, when 80%≤k≤100%, the battery can be considered qualified; when 0≤k≤80%, the battery can be considered unhealthy. Of course, there are other numbers of health levels for batteries, which will not be repeated here.

[0067] It should be noted that the above-mentioned healthy, qualified and unhealthy are only used to judge the storage capacity and discharge capacity of the battery. The healthier the battery, the stronger its storage capacity and the longer its discharge time.

[0068] Taking the classification of batteries into two health levels as an example, according to the battery specification parameters, if the theoretical discharge time corresponding to the battery health level is 100% is 10 hours, when 8h≤T (discharge time)≤10h is satisfied, the battery at this time can be considered healthy; when 0≤T≤8h is satisfied, the battery at this time can be considered unqualified.

[0069] The above-mentioned battery health monitoring method can determine the operating status of the battery by continuously acquiring and using the battery operating data of the battery. When the battery is in a stable discharge state, the discharge time required for the battery to defend against air attacks can be determined based on the battery operating data of a preset time length; then, based on the discharge time and the specification parameters of the battery, the health of the battery can be determined, so that the staff can evaluate the remaining life of the battery, the working efficiency, and the suitability of the currently matched load and other performance parameters through the battery health, thereby achieving effective management of the battery.

[0070] In an exemplary embodiment, the battery operation data includes charge and discharge currents, and the step of determining the operation state of the battery according to the continuously acquired battery operation data includes:

[0071] Determine the charge and discharge status of the battery based on the charge and discharge current.

[0072] The charge and discharge state of the battery can be determined from the flow direction of the charge and discharge current: if the charge and discharge current flows into the battery during the time when the charge and discharge current is continuously obtained, it means that the battery is in a charging state during this period of time; if the charge and discharge current flows out of the battery during the time when the charge and discharge current is continuously obtained, it means that the battery is in a discharging state during this period of time.

[0073] In one embodiment, the operating state of the battery can also be determined based on the terminal voltage at multiple different times: if the terminal voltage increases with the passage of time, it means that the battery is in a charging state at this time; if the terminal voltage decreases with the passage of time, it means that the battery is in a discharging state at this time.

[0074] When the battery is in a discharging state, it is determined whether the battery is in a stable discharging state according to the discharge current within a preset time length and the specification parameters of the battery.

[0075] When the battery is in a discharging state, it can be determined whether the battery is in a stable discharging state based on the charge and discharge current. Specifically, if the multiple charge and discharge currents continuously acquired all float within a preset range, it can be considered that the charge and discharge current output by the battery is stable, that is, the battery is in a stable discharging state.

[0076] The above-mentioned preset range can be determined according to the current range corresponding to the stable output of the battery as specified in the specification parameters of the battery.

[0077] When the battery is in a floating charge state, a load is connected to the battery, and whether the battery is in a stable discharge state is determined based on the discharge current within a preset time length and the specification parameters of the battery.

[0078] The floating charge state is a low-voltage charging mode used by the battery to maintain a fully charged state, which can keep the battery in a fully charged state for a long time. Connecting a load to a battery in a floating charge state can release the electric energy in the battery, and charging and discharging at the same time can keep the battery voltage constant. In this case, if the multiple charge and discharge currents continuously obtained are floating within a preset range, it can be considered that the charge and discharge current output by the battery is stable, that is, the battery is in a stable discharge state.

[0079] When the storage battery is in an equalizing charging state, the equalizing charging state of the storage battery is maintained.

[0080] The equalization charging state is a periodic charging process. The battery is charged in the equalization charging state to reach the floating charging state, and then enters the step of "when the battery is in the floating charging state, connecting the load to the battery, and judging whether the battery is in a stable discharge state according to the discharge current within a preset time length, the terminal voltage of the battery and the specification parameters of the battery"; or after disconnecting the charging power supply and connecting the load, enters the step of "when the battery is in the discharge state, judging whether the battery is in a stable discharge state according to the charge and discharge current".

[0081] Exemplarily, a 500Ah battery is provided, such as Figure 4 As shown, Figure 4 The red curve in the figure is the current variation curve of the battery, and the blue curve is the voltage variation curve of the battery. Figure 4 It can be seen that when the battery is in floating charge state, the terminal voltage is artificially high, and after a period of time after the load is put into operation (see Figure 4 During the 0min~1min period (in the figure), the current is unstable, but after that, the current remains basically stable and fluctuates around 50A. During the time when the current remains stable, the voltage is basically consistent with the voltage change curve provided by the manufacturer.

[0082] In an exemplary embodiment, determining the discharge time required for discharging the battery to empty according to the battery operation data of a preset time length includes:

[0083] According to the battery operation data and the following formula, the first parameter, the second parameter and the third parameter are solved:

[0084] V(t)=at 2 +bt+c

[0085] Wherein, V(t) is the discharge voltage of the battery at time t, a is the first parameter, b is the second parameter, and c is the third parameter.

[0086] The basis for establishing the above formula can be found in Figure 4 Characteristics of the voltage change curve in .

[0087] Therefore, by substituting at least three sets of data in a stable state (a certain time point and the voltage corresponding to the time point) into the above formula, it is possible to solve the above a as the first parameter, b as the second parameter, and c as the third parameter.

[0088] Based on the first parameter, second parameter, third parameter, discharge termination voltage in the specification parameters and the following formula:

[0089] V0=aT 2 +bT+c

[0090] Wherein, V0 is the discharge termination voltage, and T is the time corresponding to the discharge termination voltage;

[0091] The discharge time is determined according to the time corresponding to the discharge termination voltage.

[0092] The time when the discharge starts is t1, and the discharge time is (T-t1). For example, if the battery starts discharging at time 0, T(T-0) is the discharge time.

[0093] In an exemplary embodiment, the battery health monitoring method further includes:

[0094] In response to the internal resistance detection command, a preset alternating current is applied to the battery.

[0095] The internal resistance detection instruction can be actively issued by the operator, or can be set in the server to be issued periodically.

[0096] The internal resistance of the battery is determined based on the terminal voltage of the battery under a preset AC current.

[0097] The health of the battery is determined based on the internal resistance of the battery.

[0098] The preset AC current can be a small-amplitude AC current to reduce the DC component therein, thereby obtaining a more accurate internal resistance detection result. Under the preset AC current, the battery will generate an AC voltage, namely the terminal voltage, and the battery can be connected with a probe of a voltage detection instrument to measure the terminal voltage. Then, based on Ohm's law, the internal resistance of the battery is determined according to the preset AC current and the terminal voltage under the preset AC current.

[0099] The health of the battery is determined based on the change degree and change trend of the internal resistance. For example, when the internal resistance of the battery increases significantly, the battery is aged, the charging cycle period decreases rapidly, and the health is greatly reduced or even unqualified. Therefore, the internal resistance of the battery can determine the health of the battery.

[0100] In one embodiment, the health of the battery is determined based on the internal resistance of the battery, the discharge time, and the specification parameters of the battery.

[0101] The internal resistance and discharge time of the battery are combined to determine the health of the battery from multiple dimensions, thereby improving the reliability of the battery health monitoring method.

[0102] Among them, the corresponding proportions of internal resistance and discharge time can be determined according to the degree of influence of the internal resistance and discharge time of the battery on the health. For example, when the internal resistance has a small influence and the discharge time has a large influence, a weight proportion of 0.2 can be assigned to the internal resistance, and a weight proportion of 0.8 can be assigned to the discharge time. Of course, parameters of other dimensions can also be combined to monitor the health.

[0103] In an exemplary embodiment, as shown in FIG5 , a battery health monitor 500 is provided, including: a discharge module 502 , a measurement and control module 504 and a monitoring terminal 506 .

[0104] The discharge module 502 is used to connect to the battery 600 .

[0105] The measurement and control module 504 is used to connect to the storage battery 600 , and the measurement and control module 504 is used to continuously measure the battery operation data of the storage battery 600 .

[0106] The monitoring terminal 506 is connected to the discharge module 502 and the measurement and control module 504 respectively, and the monitoring terminal 506 is used to execute any step of the above-mentioned method for monitoring the health of the battery 600.

[0107] The monitoring terminal 506 equipped with the above-mentioned battery 600 health monitoring method can obtain the battery operation data of the battery 600 to determine the health of the battery 600; it can also drive the discharge module 502 to release the electrical energy in the battery 600.

[0108] In an exemplary embodiment, when the monitoring terminal 506 is equipped with a display module, the monitoring terminal 506 is also used for display.

[0109] The monitoring terminal 506 can display the obtained battery operation data of the battery 600, the currently determined health status of the battery 600 and other data in real time in the display module to improve the visualization of the data.

[0110] In an exemplary embodiment, Figure 6 As shown, the discharge module 502 includes a switch tube Q and a load 5022 .

[0111] The first end of the switch tube Q is used to connect to the positive electrode of the battery 600 , the second end of the switch tube Q is connected to the control end of the monitoring terminal 506 , and the third end of the switch tube Q is grounded.

[0112] The load 5022 is connected in series to the branch of the battery 600 which is grounded via the switch tube Q.

[0113] The monitoring terminal 506 is also used to output a driving signal (Ctl signal) to the switch tube Q when the battery 600 is in a floating charge state, so as to trigger the switch tube Q to turn on.

[0114] When the switch tube Q is turned on, the branch of the battery 600 connected to the ground through the load 5022 is turned on, and the electric energy in the battery 600 is released through the load 5022, so that the battery enters a voltage-stabilized discharge state after discharge.

[0115] The driving signal may be a fixed level signal, thereby ensuring that the discharge current of the battery 600 is in a stable state.

[0116] In an exemplary embodiment, the monitoring terminal 506 is further configured to respond to an internal resistance detection instruction and output an AC control signal to the switch tube Q to periodically turn on and off the switch tube Q.

[0117] The staff can actively issue internal resistance detection instructions through touch operations on the monitoring terminal 506, and can also set the monitoring terminal 506 to periodically issue internal resistance detection instructions to output an AC control signal to the switch tube Q, thereby periodically controlling the on and off of the switch tube Q, so that a preset AC current is applied to the battery 600; then based on Ohm's law, the internal resistance of the battery 600 is determined according to the preset AC current and the terminal voltage of the battery 600 under the preset AC current.

[0118] In an exemplary embodiment, Figure 6 As shown, the above-mentioned discharge module 502 also includes: a current recovery module 5024.

[0119] The current recovery module 5024 is connected in series between the third terminal of the switch tube Q and the ground, and the output end of the current recovery module 5024 is connected to the feedback end of the monitoring terminal 506 .

[0120] The monitoring terminal 506 is further used to adjust the driving signal according to the recovery signal output by the current recovery module 5024 to maintain the stability of the discharge current of the battery 600 .

[0121] The monitoring terminal 506 adjusts the driving signal according to the current information carried by the recovery signal, thereby ensuring the stability of the discharge current flowing through the switch tube Q.

[0122] In an exemplary embodiment, the load 5022 includes: a resistance module.

[0123] The resistance module is connected in series to a branch of the battery 600 that is grounded via the switch tube Q.

[0124] The resistor module includes at least one resistor connected in series, at least one resistor connected in parallel, or a plurality of resistors connected in series and parallel. Figure 6 As shown, the resistance module may be composed of R1, R2 and R3. R1 and R2 are power resistors with appropriate resistance values ​​according to the capacity of the battery 600; and R3 is a fixed 10 mΩ resistor.

[0125] In an exemplary embodiment, the discharge module 502 further includes: a protection module 5026 .

[0126] The protection module 5026 is connected in series between the switch tube Q and the battery 600 to protect the components in the subsequent circuit.

[0127] like Figure 6 As shown, the protection module 5026 includes at least one of an overcurrent protection element (fuse F), an overvoltage protection element (TVS (Transient Voltage Suppressor)) and a reverse connection protection element (unidirectional conducting diode D).

[0128] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0129] Based on the same inventive concept, the embodiment of the present application also provides a battery health monitoring device for implementing the battery health monitoring method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more battery health monitoring device embodiments provided below can refer to the limitations of the battery health monitoring method above, and will not be repeated here.

[0130] In an exemplary embodiment, Figure 7As shown, a battery health monitoring device 700 is provided, including: a data acquisition module 702, an operation state determination module 704, a discharge time determination module 706 and a health determination module 708, wherein:

[0131] The data acquisition module 702 is used to continuously acquire the battery operation data of the battery.

[0132] The operating state determination module 704 is used to determine the operating state of the battery according to the continuously acquired battery operating data.

[0133] The discharge time determination module 706 is used to determine the discharge time required for the battery to be discharged to empty according to the battery operation data of a preset time length when the battery is in a stable discharge state.

[0134] The health determination module 708 is used to determine the health of the battery according to the discharge time and the specification parameters of the battery.

[0135] In one embodiment, the operation state determination module 704 includes: a charge and discharge state determination module, a first judgment module, a second judgment module and a third judgment module.

[0136] The charge and discharge state determination module is used to determine the charge and discharge state of the battery according to the charge and discharge current.

[0137] The first judgment module is used to judge whether the battery is in a stable discharge state according to the discharge current within a preset time length and the specification parameters of the battery when the battery is in a discharge state.

[0138] The second judgment module is used to connect the load to the battery when the battery is in a floating charge state, and judge whether the battery is in a stable discharge state according to the discharge current within a preset time length and the specification parameters of the battery.

[0139] The third judgment module is used to maintain the equalization charging state of the battery when the battery is in the equalization charging state.

[0140] In one embodiment, the discharge time determination module 706 includes: a parameter determination module, a discharge termination voltage determination module and a discharge time determination module.

[0141] The parameter determination module is used to solve the first parameter, the second parameter and the third parameter according to the battery operation data and the following formula:

[0142] V(t)=at 2 +bt+c

[0143] Wherein, V(t) is the discharge voltage of the battery at time t, a is the first parameter, b is the second parameter, and c is the third parameter.

[0144] The discharge termination voltage determination module is used to determine the discharge termination voltage according to the first parameter, the second parameter, the third parameter, the specification parameter and the following formula:

[0145] V0=aT 2 +bT+c

[0146] Wherein, V0 is the discharge termination voltage, and T is the time corresponding to reaching the discharge termination voltage.

[0147] The discharge time determination module is used to determine the discharge time according to the time corresponding to the discharge termination voltage.

[0148] In one embodiment, the battery health monitoring device 700 further includes: a response module, an internal resistance determination module and a health sub-confirmation module.

[0149] The response module is used for applying a preset alternating current to the battery in response to the internal resistance detection instruction.

[0150] The internal resistance determination module is used to determine the internal resistance of the battery according to the terminal voltage of the battery under a preset alternating current.

[0151] The health sub-confirmation module is used to determine the health of the battery based on the internal resistance of the battery.

[0152] Each module in the above battery health monitoring device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0153] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 8As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store battery operation data of the battery. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a battery health monitoring method is implemented.

[0154] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0155] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor executes the steps of any one of the above-mentioned battery health monitoring methods.

[0156] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-mentioned battery health monitoring methods are implemented.

[0157] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of any of the above-mentioned battery health monitoring methods when executed by a processor.

[0158] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0159] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0160] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery health monitoring method, characterized in that: The method comprises: Continuously obtain battery operation data of the battery; Determining the operating state of the battery according to the continuously acquired battery operating data; When the storage battery is in a stable discharge state, determining the discharge time required to discharge the storage battery to empty according to the battery operation data of a preset time length; The health of the battery is determined according to the discharge time and the specification parameters of the battery.

2. The method according to claim 1, characterized in that The battery operation data includes charge and discharge currents, and determining the operation state of the battery according to the continuously acquired battery operation data includes: Determining the charge and discharge state of the battery according to the charge and discharge current; When the battery is in a discharging state, judging whether the battery is in a stable discharging state according to the discharge current within the preset time length and the specification parameters of the battery; When the battery is in a floating charge state, connecting a load to the battery, and judging whether the battery is in a stable discharge state according to the discharge current within the preset time length and the specification parameters of the battery; When the storage battery is in an equalizing charging state, the equalizing charging state of the storage battery is maintained.

3. The method according to claim 1, characterized in that The step of determining the discharge time required for the battery to be discharged to empty according to the battery operation data of the preset time length comprises: According to the battery operation data and the following formula, the first parameter, the second parameter and the third parameter are solved: V(t)=at 2 +bt+c Wherein, V(t) is the discharge voltage of the battery at time t, a is the first parameter, b is the second parameter, and c is the third parameter; According to the first parameter, the second parameter, the third parameter, the discharge termination voltage in the specification parameters and the following formula obtained by solving: V0=aT 2 +bT+c Wherein, V0 is the discharge termination voltage, and T is the time corresponding to reaching the discharge termination voltage; The discharge time is determined according to the time corresponding to the discharge termination voltage.

4. The method according to claim 1, characterized in that: Also includes: In response to an internal resistance detection instruction, applying a preset alternating current to the battery; determining the internal resistance of the battery according to the terminal voltage of the battery under the preset alternating current; The health of the battery is determined based on the internal resistance of the battery.

5. A battery health monitor, characterized in that: include: A discharge module, the discharge module is used to connect to the battery; A measurement and control module, the measurement and control module is used to connect to the battery, and the measurement and control module is used to continuously measure the battery operation data of the battery; A monitoring terminal, wherein the monitoring terminal is connected to the discharge module and the measurement and control module respectively, and the monitoring terminal is used to execute any step of the battery health monitoring method described in any one of claims 1 to 4.

6. The battery health monitor according to claim 5, characterized in that: The discharge module comprises: A switch tube, wherein a first end of the switch tube is used to connect to the positive electrode of the battery, a second end of the switch tube is connected to the control end of the monitoring terminal, and a third end of the switch tube is grounded; A load, the load being connected in series to a branch of the battery grounded via the switch tube; The monitoring terminal is also used to output a driving signal to the switch tube when the battery is in a floating charge state, so as to trigger the switch tube to turn on.

7. The battery health monitor according to claim 6, characterized in that: The monitoring terminal is also used to respond to the internal resistance detection instruction and output an AC control signal to the switch tube to periodically turn on and off the switch tube.

8. The battery health monitor according to claim 6, characterized in that: The discharge module further comprises: A current recovery module, wherein the current recovery module is connected in series between the third end of the switch tube and the ground, and the output end of the current recovery module is connected to the feedback end of the monitoring terminal; The monitoring terminal is also used to adjust the driving signal according to the recovery signal output by the current recovery module to maintain the stability of the discharge current of the battery.

9. The battery health monitor according to claim 6, characterized in that: The load includes: A resistance module is connected in series to a branch of the battery that is grounded via the switch tube.

10. The battery health monitor according to claim 6, characterized in that: The discharge module further comprises: A protection module is connected in series between the switch tube and the battery.

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