Battery health monitoring method and battery health monitor

Abstract

The application relates to a storage battery health degree monitoring method and a storage battery health degree monitor. The method can determine the operation state of a storage battery by continuously acquiring and according to battery operation data of the storage battery. In the case that the storage battery is in a stable discharge state, the discharge time required for preventing the storage battery from being empty can be determined according to the battery operation data of a preset time length. Then, according to the discharge time and the specification parameters of the storage battery, the health degree of the storage battery can be determined, so that the staff can evaluate the remaining life, working efficiency and the suitable degree of the current matched load of the storage battery from the performance parameters of the health degree of the storage battery, thereby realizing effective management of the storage battery.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery health monitoring, and particularly relates to a storage battery health monitoring method and a storage battery health monitor. BACKGROUND

[0002] In power plants and transformer substations, a DC power supply system mainly provides working power supply for protection and control devices, and in order to ensure the power supply reliability of the DC power supply system, a storage battery is used as a backup power supply, and the storage battery in the DC power supply system is operated in a floating charge state for a long time. The storage battery is connected in parallel across the charging machine in the floating charge state, and under normal circumstances, the charging machine provides a floating charge current to supplement the charge of the storage battery, the floating charge current is extremely small and difficult to identify, and the floating charge voltage is in a long-term unchanged state; and under the condition that the storage battery is operated in a constant temperature environment, the temperature of the storage battery does not change obviously under no major accidents. Therefore, it is difficult to determine the operating state of the storage battery according to the state quantity of the storage battery, so that the health state of the storage battery cannot be determined. SUMMARY

[0003] Therefore, it is necessary to provide a storage battery health monitoring method and a storage battery health monitor capable of monitoring the health of the storage battery in view of the above technical problems.

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

[0005] continuously acquiring battery operating data of the storage battery;

[0006] determining an operating state of the storage battery according to the continuously acquired battery operating data;

[0007] in a case where the storage battery is in a stable discharge state, determining a discharge time required for the storage battery to be discharged empty according to battery operating data of a preset time length;

[0008] determining the health of the storage battery according to the discharge time and specification parameters of the storage battery.

[0009] In one of the embodiments, the battery operating data comprises a charge-discharge current, and the step of determining the operating state of the storage battery according to the continuously acquired battery operating data comprises:

[0010] determining a charge-discharge state of the storage battery according to the charge-discharge current;

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

[0012] In the case that the battery is in the floating state, the battery is connected to a load, and according to the discharge current in a preset time length and the specification parameters of the battery, it is judged whether the battery is in a stable discharge state;

[0013] In the case that the battery is in the equalizing state, the equalizing state of the battery is maintained.

[0014] In one embodiment, the step of determining the discharge time required for the battery to be emptied according to the battery operation data in a preset time length comprises:

[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] According to the first parameter, the second parameter, the third parameter, the discharge termination voltage in the specification parameters obtained by solving 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 above-mentioned battery health monitoring method further comprises:

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

[0024] According to the terminal voltage of the battery under the preset alternating current, the internal resistance of the battery is determined;

[0025] According to the internal resistance of the battery, the health degree of the battery is determined.

[0026] Secondly, the application also provides a battery health monitoring device, comprising:

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

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

[0029] The monitoring terminal is connected with the discharging module and the monitoring module respectively, and is used for executing any step of the above-mentioned battery health degree monitoring method.

[0030] In one of the embodiments, the discharging module comprises:

[0031] The switch tube has a first end connected with the positive pole of the battery, a second end connected with the control end of the monitoring terminal, and a third end grounded;

[0032] The load is connected in series with the branch of the battery grounded through the switch tube.

[0033] The monitoring terminal is further used for outputting a driving signal to the switch tube to trigger the switch tube to be turned on in the case that the battery is in the floating state.

[0034] In one of the embodiments, the monitoring terminal is further used for outputting an alternating current control signal to the switch tube to periodically turn on and turn off the switch tube in response to the internal resistance detection instruction.

[0035] In one of the embodiments, the discharging module further comprises:

[0036] The current back sampling module is connected in series between the third end of the switch tube and the ground, and has an output end connected with the feedback end of the monitoring terminal.

[0037] The monitoring terminal is further used for adjusting the driving signal according to the back sampling signal output by the current back sampling module to maintain the stability of the discharging current of the battery.

[0038] In one of the embodiments, the load comprises:

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

[0040] In one of the embodiments, the discharging module further comprises:

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

[0042] The above-mentioned battery health degree monitoring method and the battery health degree monitoring instrument can correspondingly determine the running state of the battery by continuously acquiring and according to the battery running data, and can determine the discharging time required for the battery to be empty according to the battery running data of the preset time length in the case that the battery is in the stable discharging state; then the health degree of the battery can be determined according to the discharging time and the specification parameters of the battery, so that the staff can evaluate the remaining life, working efficiency and the appropriate degree of the current matched load of the battery from the performance parameters of the health degree of the battery, thereby realizing the effective management of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other related drawings can also be obtained from these drawings without creative labor.

[0044] Figure 1 An application environment diagram of the battery health monitoring method in one embodiment;

[0045] Figure 2 A flowchart of the 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 A voltage and current change curve of the battery discharge state in one embodiment;

[0048] Figure 5 A structure block diagram of the battery health monitor in one embodiment;

[0049] Figure 6 A structure block diagram of the battery health monitor in one embodiment;

[0050] Figure 7 A structure block diagram of the battery health monitoring device in one embodiment;

[0051] Figure 8 An internal structure diagram of the computer device in one embodiment. DETAILED DESCRIPTION

[0052] In order to make the purposes, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with the 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 the conventional technology, the health degree of the battery is often judged by regularly performing nuclear capacity discharge, regularly testing internal resistance, regularly measuring terminal voltage, and through online monitoring equipment.

[0054] Among them, the way of regularly carrying out nuclear capacity discharge exists the case of large heat generation when discharging the battery with discharge capacity greater than 80%*C10 using 0.1C discharge current, low safety factor, and when activating the battery with discharge capacity greater than 80%*C10, the recovered battery cannot be put into the same use system again.

[0055] In the way of regularly testing internal resistance, the internal resistance of each battery is different due to different manufacturers, different models, different batches, etc., that is, the internal resistance has no fixed value or clear judgment standard. And due to different measuring equipment, testing principles, testers, the corresponding test results are also different, therefore, there is no unique logical relationship between internal resistance and health degree.

[0056] In the way of regularly measuring terminal voltage, the change of battery terminal voltage is not obvious, and it is difficult to judge the health degree of the battery only according to the terminal voltage. And, there are fewer cases of finding low health degree of the lag battery through this way, and the technology is not mature enough.

[0057] In the way of judging the health degree of the battery through online monitoring equipment, there is no special person to track and analyze the online measurement data of the battery for a long time, and so far, there is no low health degree of the lag battery found through the online monitoring equipment of the battery. And, in this way, the accuracy and reliability of the online monitoring equipment and the professional quality of the maintenance personnel are required to be high, and the corresponding cost is also high.

[0058] The battery health degree monitoring method provided by the embodiments of the present application can be applied to, for example Figure 1The application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the battery running data required by the server 104 to process. The data storage system can be integrated on the server 104, or placed on the cloud or other network servers. The server 104 obtains a plurality of battery running data from the data storage system, and determines the running state of the storage battery according to the battery running data. In the case that the storage battery is in a stable discharge state, the discharge time required for the storage battery to empty the electricity is determined according to the plurality of battery running data within a preset time length, and then the discharge time is used to measure the health degree of the storage battery. Further, the server 104 can transmit the finally determined health degree to the terminal 102 for the user to view, thereby improving the visualization. Among them, the terminal 102 can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things device can be a smart speaker, a smart television, a smart air conditioner, a smart vehicle device, a projection device, etc. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, etc. The head-mounted device can be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. The server 104 can be a stand-alone 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, as shown in Figure 2 , a storage battery health degree monitoring method is provided. The method is applied to the server in Figure 1 for example, including:

[0060] S202, continuously obtaining battery running data of the storage battery. The battery running data includes multi-dimensional data such as charging and discharging current, terminal voltage, internal resistance, temperature, etc.

[0061] S204, determining the running state of the storage battery according to the continuously obtained battery running data.

[0062] The running state of the storage battery can be determined according to the change trend of the terminal voltage, the flow direction of the charging and discharging current, etc.

[0063] S206, in the case that the storage battery is in a stable discharge state, determining the discharge time required for the storage battery to empty the electricity according to the battery running data within a preset time length.

[0064] It should be noted that the battery emptying power is not to empty the battery to 0 power, but to release the battery to the discharge termination voltage, which can be determined according to the specification parameters provided by the manufacturer of the battery. As shown in Figure 3 Figure 3 The discharge time of a certain battery under different current conditions is given in Table 1, wherein the greater the discharge current, the shorter the discharge time, and the less the generated power. When the discharge current is less than 0.3C, the discharge termination voltage of the battery is 1.8V, so 1.8V can be used as the discharge termination voltage of the battery.

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

[0066] Different health degrees can be set. For example, the battery can be divided into three health levels, namely healthy, qualified and unhealthy. Correspondingly, when 80%≤k (k represents the health degree)≤100%, the battery can be considered healthy; when 60%≤k≤80%, the battery can be considered qualified; and 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; and when 0≤k≤80%, the battery can be considered unhealthy. Of course, the battery can also be divided into other number of health levels, which will not be described here.

[0067] It should be noted that the above health, qualification and unhealth are only used to judge the charging and discharging capacity of the battery. The healthier the battery, the stronger its charging capacity and the longer its discharging time.

[0068] Taking the case of dividing the battery into two health levels as an example, according to the specification parameters of the battery, if the theoretical discharge time of the battery corresponding to the health degree of 100% is 10 hours, and the discharge time T satisfies 8h≤T≤10h, the battery can be considered healthy; and if the discharge time T satisfies 0≤T≤8h, the battery can be considered unqualified.

[0069] ​The battery health monitoring method can continuously acquire battery operation data, and determine the operation state of the battery according to the battery operation data. When the battery is in a stable discharge state, the discharge time required for the battery to be empty can be determined according to the battery operation data of a preset time length. Then, the health of the battery can be determined according to the discharge time and the specification parameters of the battery, so that the staff can evaluate the remaining life, working efficiency and the appropriate degree of the current matched load of the battery according to the health of the battery, thereby realizing effective management of the battery.

[0070] In an exemplary embodiment, the battery operation data includes a charging and discharging current. According to the continuously acquired battery operation data, the step of determining the operation state of the battery includes:

[0071] According to the charging and discharging current, the charging and discharging state of the battery is determined.

[0072] The charging and discharging state of the battery can be determined from the flow direction of the charging and discharging current. If the flow direction of the charging and discharging current is flowing into the battery within the time of continuously acquiring the charging and discharging current, it indicates that the battery is in a charging state within this time. If the flow direction of the charging and discharging current is flowing out of the battery within the time of continuously acquiring the charging and discharging current, it indicates that the battery is in a discharging state within this time.

[0073] In an embodiment, the operation state of the battery can also be determined according to the terminal voltage at multiple different times. If the terminal voltage increases with the passage of time, it indicates that the battery is in a charging state at this time. If the terminal voltage decreases with the passage of time, it indicates that the battery is in a discharging state at this time.

[0074] In the case that the battery is in a discharging state, whether the battery is in a stable discharging state can be determined according to the discharging current within a preset time length and the specification parameters of the battery.

[0075] In the case that the battery is in a discharging state, whether the battery is in a stable discharging state can be determined according to the charging and discharging current. Specifically, if the continuously acquired multiple charging and discharging currents are all floating within a preset range, it can be considered that the charging and discharging current output by the battery at this time is stable, that is, the battery at this time is in a stable discharging state.

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

[0077] In the case that the battery is in a floating state, the battery is connected to a load, and whether the battery is in a stable discharging state can be determined according to the discharging current within a preset time length and the specification parameters of the battery.

[0078] Float charging is a low-voltage charging mode used by batteries to maintain a fully charged state, allowing the battery to remain fully charged for extended periods. Connecting a load to a battery in float charging mode releases the energy within the battery. This simultaneous charging and discharging keeps the battery voltage constant. If multiple charge / discharge currents observed in this state fluctuate within a preset range, the battery's output charge / discharge current can be considered stable, meaning the battery is in a stable discharge state.

[0079] Maintain the battery's equalization charge state when the battery is in an equalization charge state.

[0080] Equalizing charge is a periodic charging process in which the battery is charged until it reaches float charge. Then, it proceeds to the step of "connecting a load to the battery while it is in float charge and determining whether the battery is in a stable discharge state based on the discharge current, battery terminal voltage, and battery specifications within a preset time period"; or, after disconnecting the charging power supply and connecting a load, it proceeds to the step of "determining whether the battery is in a stable discharge state based on the charging and discharging current while it is in a discharge state".

[0081] For example, a 500Ah battery is provided, such as Figure 4 As shown, Figure 4 The red curve in the graph represents the current variation of the battery, and the blue curve represents the voltage variation. Figure 4 It can be seen that when the battery is in float charging mode, the terminal voltage is artificially high, and this high voltage persists for a period of time after a load is applied (see...). Figure 4 Within the first 0 minutes to 1 minute, the current was unstable, but after that, the current remained relatively stable, fluctuating around 50A. During the period when the current remained stable, the voltage was also basically consistent with the voltage change curve provided by the manufacturer.

[0082] In one exemplary embodiment, determining the discharge time required to completely deplete the battery based on battery operation data of a preset duration includes:

[0083] Based on battery operating data and the following formulas, the first, second, and third parameters can be determined:

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

[0085] Where 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 establishment of the above formula can refer to the characteristics of the voltage change curve in Figure 4

[0087] Thus, at least three groups of data (a certain time point, the voltage corresponding to the time point) in the stable state are substituted into the above formula, and the first parameter a, the second parameter b, and the third parameter c are solved.

[0088] According to the first parameter, the second parameter, the third parameter, the discharge termination voltage in the specification parameter, and the following formula:

[0089] V0=aT 2 +bT+c

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

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

[0092] Let the time point of starting discharge be t1, and the discharge time be (T-t1). For example, if the discharge of the battery starts at 0 time, then T (T-0) is the discharge time.

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

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

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

[0096] The internal resistance of the battery is determined according to the terminal voltage of the battery under the preset alternating current.

[0097] The health of the battery is determined according to the internal resistance of the battery.

[0098] The preset alternating current can be a small amplitude alternating current to reduce the direct current component, so as to obtain a more accurate internal resistance detection result. Under the preset alternating current, the battery will correspondingly generate an alternating voltage, i.e., the terminal voltage. The probe of the voltage detection instrument can be connected to the battery to measure the terminal voltage. Then, according to the Ohm's law, the internal resistance of the battery is determined according to the preset alternating current and the terminal voltage under the preset alternating current.

[0099] The health of the battery is determined according to the change degree and the change trend of the internal resistance. For example, in the case of a large increase in the internal resistance of the battery, the battery is aging, the charging cycle period is rapidly reduced, and the health is greatly reduced or even reaches the unqualified condition. Therefore, the internal resistance of the battery can determine the health of the battery.​

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

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

[0102] Among them, the proportion corresponding to the internal resistance and the discharge time can be determined according to the degree of influence of the internal resistance and the discharge time on the health degree. For example, in the case of smaller internal resistance influence and larger discharge time influence, the internal resistance can be allocated a weight proportion of 0.2, and the discharge time can be allocated a weight proportion of 0.8. Of course, other dimensional parameters can also be combined to monitor the health degree.

[0103] In one exemplary embodiment, as shown in FIG. 5, a battery health degree monitor 500 is provided, comprising a discharge module 502, a measurement and control module 504 and a monitoring terminal 506.

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

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

[0107] The monitoring terminal 506 equipped with the above-mentioned battery 600 health degree monitoring method can obtain the battery operation data of the battery 600, thereby determining the health degree of the battery 600; and can also drive the discharge module 502 to release the electric energy in the battery 600.

[0108] In one 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 degree of the battery 600 and other data in the display module in real time, thereby improving the visualization degree of the data.

[0110] In one exemplary embodiment, as shown in FIG. Figure 6 The above-mentioned discharge module 502 comprises a switch tube Q and a load 5022.

[0111] The first end of the switch tube Q is used for connecting the positive pole of the storage 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 between the storage battery 600 and the ground via the switch tube Q.

[0113] The monitoring terminal 506 is further used for outputting a driving signal (Ctl signal) to the switch tube Q to trigger the switch tube Q to be turned on in the case that the storage battery 600 is in the floating state.

[0114] In the case that the switch tube Q is turned on, the branch of the storage battery 600 connected to the ground via the load 5022 is turned on, and the electric energy in the storage battery 600 is released via the load 5022, so that the voltage stabilizing discharge state is realized after the discharge.

[0115] The driving signal can be a fixed level signal, so as to ensure that the discharge current of the storage battery 600 is in a stable state.

[0116] In an exemplary embodiment, the monitoring terminal 506 is further used for outputting an alternating current control signal to the switch tube Q to periodically turn on and turn off the switch tube Q in response to an internal resistance detection instruction.

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

[0118] In an exemplary embodiment, as shown in Figure 6 The above discharge module 502 further includes a current back sampling module 5024.

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

[0120] The monitoring terminal 506 is further used for adjusting the driving signal according to the back sampling signal output by the current back sampling module 5024, so as to maintain the stability of the discharge current of the storage battery 600.

[0121] The monitoring terminal 506 adjusts the driving signal according to the current information carried by the back sampling signal, so as to ensure 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 resistor module is connected in series with the branch of the 600 battery that is grounded via the switching transistor Q.

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

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

[0126] The protection module 5026 is connected in series between the switching transistor 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 conduction diode D).

[0128] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0129] Based on the same inventive concept, this application also provides a battery health monitoring device for implementing the battery health monitoring method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more embodiments of the battery health monitoring device provided below can be found in the limitations of the battery health monitoring method described above, and will not be repeated here.

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

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

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

[0133] The discharge time determination module 706 is configured to determine a discharge time required for the battery to be discharged empty according to battery operating data of a preset time length, in a case where the battery is in a stable discharge state.

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

[0135] In an embodiment, the operating state determination module 704 comprises a charge-discharge state determination module, a first judgment module, a second judgment module and a third judgment module.

[0136] The charge-discharge state determination module is configured to determine a charge-discharge state of the battery according to a charge-discharge current.

[0137] The first judgment module is configured to determine whether the battery is in a stable discharge state according to a discharge current in a preset time length and a specification parameter of the battery, in a case where the battery is in a discharge state.

[0138] The second judgment module is configured to connect a load to the battery and determine whether the battery is in a stable discharge state according to a discharge current in a preset time length and a specification parameter of the battery, in a case where the battery is in a float charging state.

[0139] The third judgment module is configured to maintain a uniform charging state of the battery, in a case where the battery is in a uniform charging state.

[0140] In an embodiment, the discharge time determination module 706 comprises a parameter determination module, a discharge termination voltage determination module and a discharge time determination module.

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

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

[0143] wherein V(t) is a 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 configured 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 point corresponding to the discharge termination voltage.

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

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

[0149] The response module is configured to apply a preset alternating current to the battery in response to an internal resistance detection instruction.

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

[0151] The health degree sub-confirmation module is configured to determine the health degree of the battery according to the internal resistance of the battery.

[0152] Each module in the above-mentioned battery health monitoring device can be realized by software, hardware, or a combination thereof, in whole or in part. Each module can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to each module.

[0153] In one exemplary embodiment, a computer device is provided, which can be a server, and the internal structure diagram thereof can be as shown in FIG. 2. Figure 8As shown in the figure. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through the system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capability. 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 the battery operation data of the battery. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with the terminal outside through the network connection. The computer program is executed by the processor to realize a kind of battery health monitoring method.

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

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

[0156] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by the processor to realize the steps of any of the above battery health monitoring methods.

[0157] In one embodiment, a computer program product is provided, including a computer program, and the computer program is executed by the processor to realize the steps of any of the above battery health monitoring methods.

[0158] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to 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. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0159] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0160] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A method of monitoring the health of a battery, characterized by, The method comprises: continuously acquiring battery operation data of the storage battery; determining an operation state of the storage battery according to the continuously acquired battery operation data; in a case where the storage battery is in a stable discharge state, determining a discharge time required for the storage battery to be discharged empty according to the battery operation data of a preset time length; determining a health degree of the storage battery according to the discharge time and a specification parameter of the storage battery; wherein the battery operation data comprises a charge-discharge current, and the determining of the operation state of the storage battery according to the continuously acquired battery operation data comprises: determining a charge-discharge state of the storage battery according to the charge-discharge current; in a case where the storage battery is in a discharge state, judging whether the storage battery is in a stable discharge state according to a discharge current in the preset time length and the specification parameter of the storage battery; in a case where the storage battery is in a float charging state, connecting a load to the storage battery and judging whether the storage battery is in a stable discharge state according to a discharge current in the preset time length and the specification parameter of the storage battery; in a case where the storage battery is in a uniform charging state, maintaining the uniform charging state of the storage battery; wherein the determining of the discharge time required for the storage battery to be discharged empty according to the battery operation data of the preset time length comprises: solving a first parameter, a second parameter and a third parameter according to the battery operation data and the following formula: V(t) = at + bt + c 2 + bt + c wherein V(t) is a discharge voltage of the storage battery at t moment, a is the first parameter, b is the second parameter, and c is the third parameter; obtaining a moment corresponding to the discharge termination voltage according to the first parameter, the second parameter, the third parameter, a discharge termination voltage in the specification parameter and the following formula: V0 = aT 2 + bT + c wherein V0 is the discharge termination voltage, and T is the moment corresponding to the discharge termination voltage; determining the discharge time according to the moment corresponding to the discharge termination voltage.

2. The method of claim 1, wherein, Further comprising: in response to an internal resistance detection instruction, applying a preset alternating current to the storage battery; determining an internal resistance of the storage battery according to an end voltage of the storage battery under the preset alternating current; determining the health degree of the storage battery according to the internal resistance of the storage battery.

3. A battery health monitor, comprising: Comprise: a discharge module, the discharge module being used for connecting a storage battery; a measurement and control module, the measurement and control module being used for connecting the storage battery, and the measurement and control module being used for continuously measuring battery operation data of the storage battery; a monitoring terminal, the monitoring terminal being connected to the discharge module and the measurement and control module respectively, and the monitoring terminal being used for executing any step of the storage battery health degree monitoring method according to any one of claims 1-2.

4. The battery health monitor of claim 3, wherein, The discharge module comprises: a switch tube, a first end of the switch tube being used for connecting a positive electrode of the storage battery, a second end of the switch tube being connected to a control end of the monitoring terminal, and a third end of the switch tube being grounded; a load, the load being connected in series to a branch of the storage battery grounded through the switch tube. The monitoring terminal is further configured to output a driving signal to the switch tube to trigger the switch tube to be turned on when the storage battery is in a float state.

5. The battery health monitor of claim 4, wherein, The monitoring terminal is further configured to output an alternating current control signal to the switch tube to periodically turn on and turn off the switch tube in response to an internal resistance detection instruction.

6. The battery health monitor of claim 4, wherein, The discharging module further comprises: A current back-drawing module connected in series between a third end of the switch tube and the ground, and an output end of the current back-drawing module connected to a feedback end of the monitoring terminal. The monitoring terminal is further configured to adjust the driving signal according to a back-drawing signal output by the current back-drawing module to maintain stability of a discharging current of the storage battery.

7. The battery health monitor of claim 4, wherein, The load comprises: A resistance module connected in series on a branch through which the storage battery is grounded via the switch tube.

8. The battery health monitor of claim 4, wherein, The discharging module further comprises: A protection module connected in series between the switch tube and the storage battery.

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