A lithium battery management control method and device

Abstract

The application relates to a lithium battery management control method and device, and relates to the technical field of lithium battery management.The method comprises the following steps: collecting a lithium battery operation state and an actual temperature value; determining a state temperature value according to the lithium battery operation state; demarcating a state temperature interval according to the state temperature value; obtaining a temperature matching result by comparing the actual temperature value with the state temperature interval; collecting a duration value and a historical operation state; when the duration value exceeds a preset detection delay value, combining the temperature matching result and the historical operation state to generate management control information and outputting the management control information.The application has the effect of conveniently and accurately managing the charging and discharging of the lithium battery.

Description

Technical Field

[0001] This invention relates to the field of lithium battery management technology, and in particular to a lithium battery management and control method and apparatus. Background Technology

[0002] Lithium battery management refers to the comprehensive control over the charging and discharging process, status monitoring, safety protection, and lifespan optimization of lithium batteries, thereby ensuring the safe operation of lithium batteries, improving efficiency, extending service life, and providing users or equipment with accurate battery status information.

[0003] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 Currently, the management of lithium battery charging and discharging processes typically employs charging and discharging protection devices. These devices include a main control module using an SH79F6441 microcontroller, a power management module using a CE6601 chip, a protection chip using an SH367309 chip, a temperature detection module, a voltage detection module, an alarm indicator module, and a hardware protection module. During lithium battery charging and discharging management, a temperature protection threshold is generally set. When the actual temperature of the lithium battery exceeds the set threshold during charging or discharging, the charging and discharging circuit is cut off, thus protecting the lithium battery.

[0004] Because the charging and discharging process of lithium batteries is managed by using only a uniform temperature protection threshold, and lithium batteries are more sensitive to low temperatures during the charging phase, while the discharging phase is more intense due to large current fluctuations and more intense heat generation, it is not convenient to accurately manage the charging and discharging of lithium batteries. Summary of the Invention

[0005] To facilitate precise management of the charging and discharging of lithium batteries, this invention provides a lithium battery management and control method and apparatus.

[0006] In a first aspect, the present invention provides a lithium battery management and control method, which adopts the following technical solution: A lithium battery management and control method, comprising: S1: Collects the operating status and actual temperature value of the lithium battery; S2: Determine the state temperature value based on the operating state of the lithium battery; S3: Define the state temperature range based on the stated state temperature value; S4: By comparing the actual temperature value with the state temperature range, a temperature matching result is obtained; S5: Collect duration value and historical running status; S6: When the duration value exceeds the preset detection delay value, management control information is generated and output by combining the temperature matching result with the historical operating status.

[0007] Optionally, the method for generating the management and control information includes: S61: Determine whether the temperature matching result is within the preset normal range. S62: If yes, then collect the voltage value of a single lithium battery cell; S63: Calculate the maximum voltage difference based on the voltage value of the individual battery cell; S64: Determine the state reference voltage difference based on the operating state of the lithium battery; S65: Generate voltage reference control information by combining the maximum voltage difference, the state reference voltage difference, and the individual cell voltage value; S66: Generate status operation control information based on the historical operation status; S67: Combine the voltage reference control information with the state operation control information and use it as the management control information; S68: If not, output the preset operation stop control information as the management control information.

[0008] Optionally, the method for generating the voltage reference control information includes: S651: Determine the low-voltage reference value by comparing the voltage value of the individual battery cell with the preset low-voltage reference value; S652: Determine a voltage difference reference value based on the comparison result between the maximum voltage difference and the state reference voltage difference; S653: Determine a comprehensive reference value by combining the low-voltage reference value and the voltage difference reference value; S654: Generate voltage integrated control information based on the comprehensive reference value, as voltage reference control information.

[0009] Optionally, after outputting the management and control information, the method further includes: S71: Calculate the sum of the voltage values ​​of all the individual cells to obtain the overall voltage value; S72: Generate and output power display information based on the overall voltage value; S73: When the management control information is a preset charging operation control type, retrieve the operation control time value from the management control information; S74: Determine whether the operation control time value exceeds the preset charging duration value; S75: If yes, then by comparing the overall voltage value with the preset charging reference voltage value, determine the voltage display adjustment information and adjust the power display information; S76: If not, continue outputting the management and control information.

[0010] Optionally, after continuing to output the management and control information, the following may also be included: S761: When the overall voltage value is greater than the preset equalization voltage value, calculate the difference between the overall voltage value and the preset warning voltage value as the overall voltage deviation value; S762: Calculate the difference between the operation control time value and the preset charging duration value, and use it as the charging allowable time value; S763: Determine the equalization current value by combining the overall voltage deviation value and the charging allowance time value; S764: Collects the current charging current value; S765: Generate and output current adjustment control information based on the current charging current value and the equalization current value.

[0011] Optionally, after outputting the management and control information, the method further includes: S77: When the management control information is a preset stop control type, retrieve the stop reason information from the management control information; S78: Generate a stop warning message based on the stop reason information; S79: Combine the stop warning information and the power display information to determine the display adjustment information and output it.

[0012] Optionally, the method for determining the state temperature value includes: S21: Collect environmental monitoring information and lithium battery specifications; S22: Determine the specification test environment information and specification initial temperature information based on the lithium battery specifications; S23: Determine environmental deviation information by comparing the environmental detection information with the specification test environment information; S24: Select the initial specification temperature value from the initial specification temperature information based on the lithium battery operating status; S25: Generate an environmental deviation adjustment value by combining the environmental deviation information with the lithium battery operating status; S26: Adjust the initial specification temperature value using the environmental deviation adjustment value to obtain the specification adjustment temperature value and use it as the state temperature value.

[0013] Optionally, the method for generating the environmental deviation adjustment value includes: S251: Retrieve state type information from the lithium battery operating state; S252: Determine the temperature adjustment coefficient and humidity adjustment coefficient based on the aforementioned state type information; S253: Retrieve the temperature deviation value and humidity deviation value from the environmental deviation information; S254: Calculate the product of the temperature adjustment coefficient and the temperature deviation value, and use it as the temperature deviation adjustment value; S255: Calculate the product of the humidity adjustment coefficient and the humidity deviation value, and use it as the humidity deviation adjustment value; S256: Calculate the sum of the temperature deviation adjustment value and the humidity deviation adjustment value, and use it as the environmental deviation adjustment value.

[0014] Optionally, after calculating the temperature deviation adjustment value, the method further includes: S2541: Collect the actual detection location point corresponding to the actual temperature value; S2542: Determine the specification detection location point, reference distance value, and distance adjustment coefficient based on the lithium battery specifications; S2543: Calculate the distance between the actual detection location point and the specification detection location point, and use it as the detection location distance value; S2544: When the detection location distance value exceeds the reference distance value, the difference between the two is calculated as the distance deviation value; S2545: Calculate the product of the distance deviation value and the distance adjustment coefficient, and use it as the distance deviation adjustment value; S2546: Update the temperature deviation adjustment value using the distance deviation adjustment value.

[0015] Secondly, the present invention provides a lithium battery management and control device, which adopts the following technical solution: A lithium battery management and control device includes a memory and a processor. The memory stores a computer program that can be loaded and executed by the processor according to any one of the first aspects.

[0016] In summary, the present invention has at least one of the following beneficial technical effects: 1. By collecting data on the operating status and actual temperature of the lithium battery, and determining the state temperature value based on the operating status of the lithium battery, a state temperature range is defined. Then, based on the matching result between the actual temperature value and the state temperature range, the duration value and historical operating status are collected. When the duration value exceeds the preset detection delay value, management and control information is generated and output by combining the temperature matching result and historical operating status. This ensures that the temperature threshold is accurately matched with the thermal characteristics under different operating conditions, and the delayed triggering avoids false protection due to instantaneous temperature fluctuations, thus facilitating precise management of the charging and discharging of the lithium battery. 2. By judging whether the temperature matching result falls within the preset normal range, the voltage value of a single cell is collected to analyze and generate voltage reference control information, which is then combined with the status operation control information as management control information, or preset operation and stop control information is output as management control information, thereby improving the accuracy of the acquired management control information; 3. By dynamically adjusting the state temperature value in combination with factors such as environmental deviation and detection location, the accuracy of the obtained state temperature value is improved. Attached Figure Description

[0017] Figure 1 This is a flowchart of the lithium battery management and control method; Figure 2 This is a flowchart illustrating the method for determining the state temperature value; Figure 3 This is a flowchart illustrating the method for generating management and control information; Figure 4 It is the circuit of the charge and discharge protection device. Figure 1 ; Figure 5 It is the circuit of the charge and discharge protection device. Figure 2 ; Figure 6 It is the circuit of the charge and discharge protection device. Figure 3 ; Figure 7 It is the circuit of the charge and discharge protection device. Figure 4 ; Figure 8 It is the circuit of the charge and discharge protection device. Figure 5 ; Figure 9 It is the circuit of the charge and discharge protection device. Figure 6 . Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] A lithium battery management and control method dynamically collects multi-dimensional parameters such as the lithium battery's operating status, actual temperature, and individual cell voltage. First, it determines the state temperature value and range based on the operating status, environmental deviations, detection locations, and other factors. Then, it obtains a matching result by comparing the actual temperature with the range. After the duration exceeds a preset delay, it integrates the temperature matching result, individual cell voltage difference, historical operating status, and other factors to generate management and control information. At the same time, it links logic such as voltage balancing adjustment, dynamic adaptation of power display, and accurate early warning of abnormal causes, thereby ensuring that the temperature threshold is accurately matched with the thermal characteristics under different operating conditions, thus facilitating precise management of the lithium battery's charging and discharging.

[0020] Reference Figure 1This invention discloses a lithium battery management and control method, which includes: S1: Collect the operating status and actual temperature value of the lithium battery.

[0021] The operating status of a lithium battery refers to its current working mode. This mainly includes charging (external power source inputting energy into the battery), discharging (battery outputting energy to a load), and idle (non-charging / discharging idle state). The operating status is determined by monitoring the direction and magnitude of the current in the charging and discharging circuits: when current is detected flowing from an external power source into the battery, it is determined to be in charging mode; when current flows from the battery to the load, it is determined to be in discharging mode; and when the current is zero, combined with the characteristic of stable voltage changes, it is determined to be in idle mode.

[0022] Actual temperature values ​​refer to the current temperature data at critical locations of the lithium battery, reflecting the battery's real-time thermal state. These actual temperature values ​​are acquired through NTC thermistors or thermocouples pre-deployed at critical locations on the lithium battery. Critical locations include the lithium battery cells, the surface of the battery pack, and other key areas, which are pre-set by the operator according to actual needs.

[0023] S2: Determine the state temperature value based on the operating status of the lithium battery.

[0024] Among them, the state temperature value refers to the reference temperature parameter set according to the operating state of the lithium battery and in order to ensure the safe and efficient operation of the lithium battery.

[0025] By analyzing the operating status of lithium batteries, the state temperature value can be determined, which facilitates the subsequent delineation of the safe temperature range of lithium batteries under different states.

[0026] To further ensure the rationality of the condition temperature value, it is necessary to perform a further separate analysis and calculation on the condition temperature value, which will be explained in detail through the steps shown below.

[0027] Reference Figure 2 The method for determining the state temperature value includes the following steps: S21: Collect environmental monitoring information and lithium battery specifications.

[0028] Environmental monitoring information refers to external environmental parameters related to the operation of the lithium battery, including ambient temperature and humidity values. This information is acquired through temperature and humidity sensors pre-installed on the outer surface of the lithium battery.

[0029] Lithium battery specifications refer to the inherent technical parameters of a lithium battery. These specifications include factory-set parameters such as battery type, rated capacity, nominal voltage, number of individual cells, series / parallel connection method of individual cells, design charge / discharge temperature range, and maximum charge / discharge current. Lithium battery specifications can be obtained by reading pre-written specification data or by user input.

[0030] S22: Determine the specification test environment information and specification initial temperature information based on the lithium battery specifications.

[0031] Among them, the specification testing environment information refers to the standard environmental conditions used to test battery performance and determine basic parameters when lithium batteries leave the factory. The specification testing environment information includes specification testing temperature values ​​and specification testing humidity values. Specification initial temperature information refers to the initial temperature benchmark data determined by the lithium battery specifications under different operating conditions. Specification initial temperature information includes initial charging temperature threshold, initial discharging temperature threshold, and static storage temperature range, etc.

[0032] By inputting the lithium battery specifications into a preset specification database, the specification test environment information and initial specification temperature information are obtained for convenient subsequent use.

[0033] The specification database pre-stores different lithium battery specifications, their corresponding test environment information, and initial temperature information. The specification database is obtained after the operator pre-enters the information.

[0034] S23: Determine environmental deviation information by comparing environmental testing information with specification testing environmental information.

[0035] Among them, environmental deviation information refers to the difference data corresponding to deviations in the actual collected ambient temperature and humidity. Environmental deviation information includes temperature deviation values ​​and humidity deviation values. The temperature deviation value refers to the difference data corresponding to deviations in ambient temperature, and the humidity deviation value refers to the difference data corresponding to deviations in ambient humidity.

[0036] By retrieving the ambient temperature and humidity values ​​from the environmental monitoring information, and the specified test temperature and humidity values ​​from the specified test environment information, the difference between the ambient temperature value and the specified test temperature value is calculated as the temperature deviation value, and the difference between the ambient humidity value and the specified test humidity value is calculated as the humidity deviation value. The temperature deviation value and the humidity deviation value are then combined as environmental deviation information for convenient subsequent use.

[0037] S24: Select the initial temperature value of the specification from the initial temperature information based on the operating status of the lithium battery.

[0038] Among them, the initial temperature value refers to the corresponding initial temperature reference value selected from the initial temperature information of the specification for the current specific operating state of the lithium battery.

[0039] By selecting the initial temperature corresponding to the lithium battery's operating state from the initial temperature information in the specifications and using it as the initial temperature value in the specifications, it is convenient for subsequent use.

[0040] For example, the initial temperature specifications include an initial high temperature threshold of 45°C for charging, an initial low temperature threshold of 0°C for charging, an initial high temperature threshold of 60°C for discharging, and an initial low temperature threshold of -20°C for discharging. When the lithium battery is in the charging state, both 45°C and 0°C are selected as the initial temperature values ​​for the specifications.

[0041] S25: Generate environmental deviation adjustment values ​​by combining environmental deviation information with the operating status of the lithium battery.

[0042] Among them, the environmental deviation adjustment value refers to the value corresponding to the temperature correction when the actual environment deviates from the standard test environment and the current operating state of the lithium battery.

[0043] By analyzing environmental deviation information and the operating status of lithium batteries, environmental deviation adjustment values ​​are generated for convenient subsequent use.

[0044] To further ensure the rationality of the environmental deviation adjustment value, it is necessary to perform a further separate analysis and calculation on the environmental deviation adjustment value, which will be explained in detail through the steps shown below.

[0045] The method for generating environmental deviation adjustment values ​​includes the following steps: S251: Retrieve status type information from the lithium battery's operating status.

[0046] Among them, the status type information refers to the specific classification identifier of the lithium battery's operating status, which is used to clarify the current working mode type of the battery, such as charging status type, discharging status type, or resting status type.

[0047] By retrieving the state type from the lithium battery's operating status and using it as state type information, it becomes easier to use later.

[0048] S252: Determine the temperature adjustment coefficient and humidity adjustment coefficient based on the status type information.

[0049] The temperature adjustment coefficient refers to the adjustment parameter required when the ambient temperature deviation is quantified as an impact on the state temperature value, necessitating adjustment. The magnitude of the temperature adjustment coefficient is set based on the temperature sensitivity of the lithium battery under different operating conditions. The humidity adjustment coefficient refers to the adjustment parameter required when the ambient humidity deviation is quantified as an impact on the state temperature value, necessitating adjustment. The humidity adjustment coefficient is determined based on the degree of influence of humidity on battery performance under different operating conditions.

[0050] By inputting the status type information into the preset adjustment coefficient database, the temperature adjustment coefficient and humidity adjustment coefficient are obtained for convenient subsequent use.

[0051] The adjustment coefficient database pre-stores information on different status types and their corresponding temperature and humidity adjustment coefficients. The adjustment coefficient database can be pre-set by the operator according to actual needs.

[0052] For example, because batteries are more sensitive to temperature deviations during charging due to active chemical reactions, the temperature adjustment coefficient is set to 0.6, while humidity has a relatively small impact on charging, so the humidity adjustment coefficient is set to 0.1. During discharging, temperature sensitivity is slightly lower, so the temperature adjustment coefficient is set to 0.4, and when the humidity effect is negligible, the humidity adjustment coefficient is set to 0.05. During resting, environmental influences are weak, so the temperature adjustment coefficient is set to 0.2, and the humidity adjustment coefficient is set to 0.03. Furthermore, the temperature adjustment coefficients of 0.6 and humidity adjustment coefficients of 0.1 for each charging state, the temperature adjustment coefficients of 0.4 and humidity adjustment coefficients of 0.05 for each discharging state, and the temperature adjustment coefficients of 0.2 and humidity adjustment coefficients of 0.03 for each resting state are pre-stored in the adjustment coefficient database for easy retrieval later.

[0053] S253: Retrieve temperature deviation and humidity deviation values ​​from environmental deviation information.

[0054] Among them, temperature deviation and humidity deviation values ​​are retrieved from environmental deviation information to facilitate subsequent use.

[0055] S254: Calculate the product of the temperature adjustment coefficient and the temperature deviation value, and use it as the temperature deviation adjustment value.

[0056] Among them, the temperature deviation adjustment value refers to the adjustment value that needs to be adjusted based on the temperature deviation of the initial temperature value of the specification.

[0057] The product of the temperature adjustment coefficient and the temperature deviation value is calculated, and the result is used as the temperature deviation adjustment value for convenient subsequent use.

[0058] To further ensure the rationality of the calculated temperature deviation adjustment value, a further separate analysis and calculation is required after the temperature deviation adjustment value is calculated. The specific steps are explained in detail below.

[0059] After calculating the temperature deviation adjustment value, the following steps are included: S2541: Collect the actual detection location point corresponding to the actual temperature value.

[0060] The actual detection location refers to the specific installation position of the temperature sensor on the lithium battery pack or cell. The actual detection location is obtained by reading the position of the temperature sensor corresponding to the actual temperature value, facilitating subsequent use.

[0061] S2542: Determine the specification detection location point, reference distance value, and distance adjustment coefficient based on the lithium battery specifications.

[0062] Among these, the specification testing location point refers to the standard position corresponding to the temperature test of the lithium battery. The reference distance value refers to the maximum allowable deviation in temperature testing distance. The distance adjustment factor refers to the degree of influence of distance deviation on temperature correction. Different lithium battery specifications correspond to different specification testing locations, reference distance values, and distance adjustment factors.

[0063] By inputting the lithium battery specifications into a preset specification database, the specification detection location point, reference distance value, and distance adjustment coefficient are obtained for easy subsequent use.

[0064] The specification database contains a pre-stored table of different lithium battery specifications and their corresponding specification testing locations, reference distance values, and distance adjustment coefficients. The specification database is obtained by the operator after pre-entry.

[0065] S2543: Calculate the distance between the actual inspection location and the specification inspection location, and use it as the inspection location distance value.

[0066] Among them, the detection location distance value refers to the distance between the actual detection location point and the specification detection location point.

[0067] Calculating the distance value at the detection location facilitates subsequent use.

[0068] S2544: When the detection location distance value exceeds the reference distance value, calculate the difference between the two as the distance deviation value.

[0069] The distance deviation value refers to the distance value corresponding to the detection position when there is a deviation.

[0070] When the detection location distance exceeds the reference distance, it indicates that the actual detection location will affect the temperature. Therefore, the difference between the detection location distance and the reference distance is calculated, and the calculation result is used as the distance deviation value for subsequent use.

[0071] S2545: Calculate the product of the distance deviation value and the distance adjustment coefficient, and use it as the distance deviation adjustment value.

[0072] Among them, the distance deviation adjustment value refers to the adjustment value corresponding to the initial temperature value of the specification when it needs to be adjusted based on the distance deviation value.

[0073] The distance deviation value is calculated by multiplying it by the distance adjustment coefficient, and the result is used as the distance deviation adjustment value for convenient subsequent use.

[0074] S2546: Update the temperature deviation adjustment value using the distance deviation adjustment value.

[0075] Specifically, the accuracy of the obtained temperature deviation adjustment value is improved by calculating the sum between the distance deviation adjustment value and the temperature deviation adjustment value, and then using the sum to replace and update the temperature deviation adjustment value.

[0076] S255: Calculate the product of the humidity adjustment coefficient and the humidity deviation value, and use it as the humidity deviation adjustment value.

[0077] The humidity deviation adjustment value refers to the adjustment value required when the initial temperature value of the specification needs to be adjusted based on the humidity deviation.

[0078] The product of the humidity adjustment coefficient and the humidity deviation value is calculated, and the result is used as the humidity deviation adjustment value for convenient subsequent use.

[0079] S256: Calculate the sum of the temperature deviation adjustment value and the humidity deviation adjustment value, and use it as the environmental deviation adjustment value.

[0080] Among them, the environmental deviation adjustment value refers to the adjustment value corresponding to the initial temperature value of the specification when it needs to be adjusted according to environmental conditions.

[0081] By calculating the sum of the temperature deviation adjustment value and the humidity deviation adjustment value, and using the calculation result as the environmental deviation adjustment value, the accuracy of the obtained environmental deviation adjustment value is improved.

[0082] S26: Adjust the initial specification temperature value using the environmental deviation adjustment value to obtain the specification adjustment temperature value and use it as the status temperature value.

[0083] The specification adjustment temperature value refers to the temperature value after adjusting the initial specification temperature value.

[0084] By calculating the sum between the environmental deviation adjustment value and the initial specification temperature value, and using the calculation result as the specification adjustment temperature value, and then using the specification adjustment temperature value as the state temperature value, the accuracy of the obtained state temperature value is improved.

[0085] S3: Define the state temperature range based on the state temperature value.

[0086] The state temperature range refers to the range used to determine whether the temperature of a lithium battery is within a safe range.

[0087] The state tolerance value is obtained by calculating the sum between the preset temperature tolerance value and the state temperature value. Then, two adjacent values ​​in the state tolerance value are used as the two endpoints of the interval to obtain the state temperature interval, which is convenient for subsequent use.

[0088] The temperature tolerance value refers to the deviation value corresponding to the allowable temperature value. The temperature tolerance value is set in advance by the operator according to actual needs.

[0089] For example, when in charging mode, 45℃ and 0℃ are both used as the initial specification temperature values. The initial specification temperature values ​​are then adjusted to obtain status temperature values ​​of 50℃ and -3℃, with a temperature tolerance of ±5℃. At this point, the status tolerance values ​​are calculated to be 45℃, 55℃, -8℃, and 2℃. Then, the minimum and maximum values ​​are selected from the status tolerance values ​​to obtain the status temperature ranges as follows: low temperature warning range for charging is -8℃ to 2℃, normal charging range is 2℃ to 45℃, and high temperature warning range for charging is 45℃ to 55℃.

[0090] S4: By comparing the actual temperature value with the state temperature range, the temperature matching result is obtained.

[0091] Among them, the temperature matching result refers to the qualitative judgment result obtained by comparing the actual temperature value collected in real time by the lithium battery with the defined state temperature range.

[0092] By matching the actual temperature value with the temperature range, and using the matching result as the temperature matching result, it can be determined whether the current temperature of the battery is within a safe range.

[0093] S5: Collect duration value and historical running status.

[0094] The duration value refers to the continuous length of time that the actual temperature of the lithium battery falls within a certain temperature range (such as a safe range, warning range, or protection range). Specifically, the duration value corresponds to the time elapsed after obtaining the same temperature matching result. When adjacent unit times yield the same temperature matching result, timing is performed, and the timing result is used as the duration value.

[0095] Historical operating status refers to the operating record of a lithium battery over a period of time prior to the current moment. Historical operating status is retrieved and accessed by querying the operating status database. The historical operating status is queried and stored in real time.

[0096] S6: When the duration value exceeds the preset detection delay value, management control information is generated and output by combining the temperature matching result with the historical operating status.

[0097] The detection delay value refers to a pre-set time threshold. This value filters out instantaneous fluctuations in the lithium battery's temperature, ensuring that subsequent control logic is triggered only when the temperature remains within a certain range for the specified duration, thus preventing malfunctions due to short-term interference. The detection delay value is preset by the operator according to actual needs.

[0098] Management and control information refers to the control information used to adjust the operation of lithium batteries. Management and control information includes normal charging and discharging, stopping charging, and stopping discharging.

[0099] When the duration exceeds the preset detection delay value, it indicates that the temperature is continuously within a certain temperature range. Therefore, by analyzing the temperature matching results and historical operating status, management and control information is generated and output, thereby enabling precise management of lithium battery charging and discharging under different operating conditions.

[0100] To further ensure the rationality of management control information, it is necessary to perform further separate analysis and calculation on the management control information, which will be explained in detail through the steps shown below.

[0101] Reference Figure 3 The method for generating management and control information includes the following steps: S61: Determine whether the temperature matching result falls within the preset normal range. If yes, proceed to S62; if no, proceed to S68.

[0102] The "normal range fit-in result" refers to the matching result corresponding to a fit within the normal range. Normal range fit-in results include normal charging range, normal discharging range, and normal resting range.

[0103] By judging whether the temperature matching result falls within the preset normal range, it can be determined whether the charging and discharging is in a normal state.

[0104] S62: Collects the voltage value of a single lithium battery cell.

[0105] The individual cell voltage value refers to the real-time voltage data of a single cell in a lithium battery pack. Lithium batteries are typically composed of multiple cells connected in series or parallel. The voltage state of each cell directly reflects its energy storage, health status, and charge / discharge balance, and is a core parameter for determining whether a cell is overcharged, over-discharged, or experiencing inconsistency deterioration. The individual cell voltage value is acquired by connecting a cell voltage detection chip pre-installed inside the lithium battery to the positive and negative terminals of each individual cell.

[0106] When the temperature matching result falls within the preset normal range, it indicates that the battery is in a normal charging and discharging state. Therefore, the voltage value of the individual battery cell is collected for subsequent use.

[0107] S63: Calculate the maximum voltage difference based on the voltage value of a single cell.

[0108] The maximum voltage difference refers to the maximum difference between the voltage values ​​of all individual cells in a lithium battery pack.

[0109] By retrieving the highest and lowest individual cell voltages from the individual cell voltage values, calculating the difference between the highest and lowest individual cell voltages, and then using the calculation result as the maximum voltage difference for convenient subsequent use.

[0110] S64: Determine the state reference voltage difference based on the operating status of the lithium battery.

[0111] The state reference voltage difference refers to the maximum voltage difference threshold preset based on the current operating state of the lithium battery, used to determine whether the cell consistency is normal. Different lithium battery operating states correspond to different state reference voltage differences.

[0112] The lithium battery operating status is input into a preset state voltage difference database to obtain a state reference voltage difference, which facilitates subsequent use.

[0113] The state voltage difference database pre-stores a lookup table of different lithium battery operating states and their corresponding state reference voltage differences. The state voltage difference database can be pre-set by the operator according to their needs.

[0114] For example, when the lithium battery is in discharge mode, the state reference voltage difference is set to 1500mV; when the lithium battery is in charging mode, the state reference voltage difference is set to 1000mV.

[0115] S65: Generates voltage reference control information by combining the maximum voltage difference, the state reference voltage difference, and the voltage value of a single cell.

[0116] Among them, voltage reference control information refers to the control information used to control the state operation based on the voltage status of individual cells in the lithium battery pack.

[0117] By analyzing the maximum voltage difference, the state reference voltage difference, and the voltage value of a single cell, voltage reference control information is generated for convenient subsequent use.

[0118] To further ensure the rationality of the voltage reference control information, it is necessary to perform further separate analysis and calculation on the voltage reference control information, which will be explained in detail through the steps shown below.

[0119] The method for generating voltage reference control information includes the following steps: S651: Determine the low-voltage reference value by comparing the voltage value of a single cell with the preset low-voltage reference value.

[0120] The low-voltage reference value refers to the voltage threshold at which a single lithium battery cell poses a low-voltage risk. This low-voltage reference value is preset by the operator. The low-voltage reference value is the reference value used when specific charge / discharge control is applied based on the voltage of a single lithium battery cell.

[0121] By comparing the voltage value of a single cell with a preset low-voltage reference value, if the voltage value of a single cell is greater than the low-voltage reference value, it indicates that there is no low-voltage risk at this time, so the preset normal voltage reference value is output as the low-voltage reference value. If the voltage value of a single cell is not greater than the low-voltage reference value, it indicates that there is a low-voltage risk at this time, so the preset abnormal voltage reference value is output as the low-voltage reference value for convenient use in the future.

[0122] The normal voltage reference value is the reference value used to indicate when the voltage is normal, while the abnormal voltage reference value is the reference value used to indicate when the voltage is abnormal. Both the normal and abnormal voltage reference values ​​are preset by the operator according to actual needs.

[0123] For example, the normal voltage reference value can be set to 1, and the abnormal voltage reference value can be set to 0.

[0124] S652: Determine the voltage difference reference value based on the comparison result between the maximum voltage difference and the state reference voltage difference.

[0125] Among them, the voltage difference reference value refers to the reference value when the specific charge and discharge control is referenced based on the voltage difference.

[0126] By comparing the maximum voltage difference with the state reference voltage difference, when the maximum voltage difference is greater than the state reference voltage difference, it indicates that the voltage difference is abnormal. Therefore, a preset voltage difference abnormal reference value is output as the voltage difference reference value. When the maximum voltage difference is not greater than the state reference voltage difference, it indicates that the voltage difference is normal. Therefore, a preset voltage difference normal reference value is output as the voltage difference reference value for convenient subsequent use.

[0127] The voltage difference normal reference value is the reference value used to indicate when there is an abnormality in the voltage difference. The voltage difference normal reference value is the reference value used to indicate when there is no abnormality in the voltage difference. Both the voltage difference normal reference value and the voltage difference normal reference value are preset by the operator according to actual needs.

[0128] For example, the normal reference value for voltage difference can be set to 1, and the abnormal reference value for voltage difference can be set to 0.

[0129] S653: Determine the comprehensive reference value by combining the low-voltage reference value and the voltage difference reference value.

[0130] The comprehensive reference value refers to the reference value used when specific charge and discharge control is referenced based on the voltage and voltage difference of each individual cell in the lithium battery.

[0131] The sum of the low-voltage reference value and the voltage difference reference value is calculated, and the calculation result is used as a comprehensive reference value for convenient subsequent use.

[0132] S654: Generates comprehensive voltage control information based on the comprehensive reference value, which serves as the voltage reference control information.

[0133] Among them, voltage integrated control information refers to the control information corresponding to the specific charging and discharging control based on the reference value.

[0134] By comparing the comprehensive reference value with the preset normal operation reference value, if the comprehensive reference value is less than the normal operation reference value, it indicates that the current state is abnormal. Therefore, the preset operation stop control information is output as the voltage comprehensive control information. If the comprehensive reference value is not less than the normal operation reference value, it indicates that the current state is normal. Therefore, the preset operation continue control information is output as the voltage comprehensive control information, and the voltage comprehensive control information is used as the voltage reference control information, thereby improving the accuracy of the acquired voltage reference control information.

[0135] The normal operating reference value refers to the reference value at which operation can continue. The operation stop control information refers to the control information used to stop the current operating state. The operation continue control information refers to the control information used to continue operation. All three parameters—normal operating reference value, operation stop control information, and operation continue control information—are preset by the operator.

[0136] For example, the normal operating baseline reference value can be set to 2.

[0137] S66: Generate status operation control information based on historical operation status.

[0138] Among them, status operation control information refers to the control commands corresponding to the historical operating states of the lithium battery. Different historical operating states correspond to different status operation control information.

[0139] By inputting historical operating status into a preset operating status control database, operating status control information can be obtained through matching, which facilitates subsequent use.

[0140] The status operation control database stores historical operation statuses and corresponding status operation control information in advance, and the status operation control database is preset by the operator.

[0141] For example, when the historical operating state is charging, the operating control information is charging control information. When the historical operating state is discharging, the operating control information is discharging control information.

[0142] S67: Combine voltage reference control information with status operation control information and use it as management control information.

[0143] In this process, by combining voltage reference control information with state operation control information, complete control information is formed and used as management control information, thereby improving the accuracy of the acquired management control information.

[0144] S68: Output preset operation and stop control information as management control information.

[0145] When the temperature matching result does not fall within the preset normal range, it indicates that the charging and discharging process is not in a normal state. Therefore, the preset operation stop control information is output as management control information to improve the accuracy of the acquired management control information.

[0146] To further ensure the rationality of the output management and control information, it is necessary to perform further separate analysis and calculation on the output management and control information, which will be explained in detail through the following steps.

[0147] After outputting the management and control information, the following steps are also included: S71: Calculate the sum of the voltage values ​​of all individual cells as the overall voltage value.

[0148] The overall voltage value refers to the overall voltage value of all individual cells in a lithium battery.

[0149] Calculating the overall voltage value facilitates subsequent use.

[0150] S72: Generates and outputs power display information based on the overall voltage value.

[0151] Among them, the power display information refers to the display information that shows the power status of the lithium battery.

[0152] By comparing the overall voltage value with the preset power display range, and outputting the power display information obtained by querying and matching when the overall voltage value falls into the power display range, users can easily understand the power consumption in a timely manner.

[0153] The power display range refers to the range set for displaying different levels of power. The power display range is set by the operator according to their needs.

[0154] For example, the battery level display range can be set to less than 3.4V, 3.4V to 3.5V, 3.5V to 3.63V, and greater than 3.63V. When the battery level display range is less than 3.4V, the corresponding battery level display information is the first green light breathing. When the battery level display range is 3.4V to 3.5V, the corresponding battery level display information is the first and second green lights breathing. When the battery level display range is 3.5V to 3.63V, the corresponding battery level display information is the first, second, and third green lights breathing. When the battery level display range is greater than 3.63V, the corresponding battery level display information is all four green lights illuminated.

[0155] S73: When the management control information is a preset charging operation control type, retrieve the operation control time value from the management control information.

[0156] Among them, the charging operation control type refers to the type of control used when charging is initiated. The operation control time value refers to the duration value corresponding to the management control information remaining unchanged.

[0157] When the management control information is the preset charging operation control type, it indicates that the device is in a charging state. Therefore, the operation control time value can be retrieved through the management control information for convenient use later.

[0158] S74: Determine whether the running control time value exceeds the preset charging duration value. If yes, execute S75; if no, execute S76.

[0159] The charging duration value refers to the maximum allowed duration for a single charging cycle. This charging duration value is preset by the operator.

[0160] By judging whether the operation control time value exceeds the preset charging duration value, it is possible to determine whether there is a prolonged overcharging.

[0161] S75: By comparing the overall voltage value with the preset charging reference voltage value, the voltage display adjustment information is determined and the power display information is adjusted.

[0162] The charging reference voltage value refers to the voltage value after charging for the specified duration, and this value is preset by the operator. The voltage display adjustment information refers to the adjustment information required when the display needs to be adjusted based on the overall voltage condition.

[0163] When the operation control time exceeds the preset charging duration, it indicates that there is prolonged overcharging. Therefore, the overall voltage value is compared with the preset charging reference voltage value. If the overall voltage value is greater than the charging reference voltage value, it indicates that there is an overcharging abnormality, so a preset overcharging abnormality display message is output as voltage display adjustment information. If the overall voltage value is not greater than the charging reference voltage value, it indicates that there is no overcharging abnormality, so a preset display maintenance adjustment message is output as voltage display adjustment information, and the power display information is adjusted according to the voltage display adjustment information.

[0164] The overcharge error display information refers to the adjustment information used to show when an overcharge occurs, while the maintenance adjustment information refers to the adjustment information used to maintain the original power display. Both the overcharge error display information and the maintenance adjustment information are preset by the operator.

[0165] S76: Continue outputting management and control information.

[0166] When the operation control time exceeds the preset charging duration, it indicates that there is no prolonged overcharging. Therefore, management control information continues to be output.

[0167] To further ensure the rationality of continuing to output management and control information, it is necessary to perform further separate analysis and calculations after continuing to output management and control information, which will be explained in detail through the following steps.

[0168] After continuing to output management and control information, the following steps are also included: S761: When the overall voltage value is greater than the preset equalization voltage value, calculate the difference between the overall voltage value and the preset warning voltage value, and use it as the overall voltage deviation value.

[0169] The equalization voltage value refers to the voltage value required for equalization charging, which is preset by the operator. The overall voltage deviation value refers to the deviation value when there is a deviation in the overall voltage.

[0170] When the overall voltage value is greater than the preset equalization voltage value, it indicates that equalization charging is required. Therefore, the difference between the overall voltage value and the preset warning voltage value is calculated, and the calculation result is used as the overall voltage deviation value for convenient subsequent use.

[0171] S762: Calculate the difference between the operation control time value and the preset charging duration value, and use it as the charging allowable time value.

[0172] Among them, the charging allowance time value refers to the remaining allowance time value when charging once.

[0173] The difference between the operating control time value and the preset charging duration value is calculated, and the calculation result is used as the allowable charging time value for convenient subsequent use.

[0174] S763: Determine the equalization current value by combining the overall voltage deviation value and the charging allowance time value.

[0175] The equalization current value refers to the current value corresponding to equalization charging.

[0176] The charge deviation is calculated based on the overall voltage deviation and the preset nominal battery capacity. Then, the equalization current value is calculated based on the charge deviation and the allowable charging time, which facilitates subsequent use.

[0177] S764: Collects the current charging current value.

[0178] The current charging current value refers to the current value at the current time during charging. This current charging current value is obtained by a current detection element pre-installed in the lithium battery.

[0179] S765: Generates and outputs current adjustment control information based on the current charging current value and the equalization current value.

[0180] Among them, current adjustment control information refers to the control information corresponding to adjusting the charging current.

[0181] By calculating the difference between the current charging current value and the equalization current value, and outputting the corresponding adjustment control information as the current adjustment control information, the charging current can be adjusted in a timely manner, thereby improving the accuracy of charging.

[0182] To further ensure the rationality of the output management and control information, it is necessary to perform further separate analysis and calculation on the output management and control information, which will be explained in detail through the following steps.

[0183] After outputting the management and control information, the following steps are also included: S77: When the management control information is a preset stop control type, retrieve the stop reason information from the management control information.

[0184] The "Stop Control Type" refers to the control type used to stop the lithium battery from charging or discharging. The stop control type is obtained after pre-entry by the operator. The "Stop Reason Information" refers to the reason information corresponding to the stop of the lithium battery's charging or discharging.

[0185] When the management control information is a preset stop control type, it means that the lithium battery has stopped charging or discharging. Therefore, the analysis and judgment process before the output of the control information is retrieved through the management control information to determine the reason for the stop, which is convenient for subsequent use.

[0186] S78: Generate stop warning information based on the stop reason information.

[0187] Among them, the stop warning information refers to the warning information used to indicate the reason why the lithium battery stops charging or discharging. Different stop reasons correspond to different stop warning information.

[0188] By inputting the stop reason information into a preset stop warning database, stop warning information can be obtained for convenient subsequent use.

[0189] The stop warning database pre-stores a table that matches different stop reasons with their corresponding stop warning information. The stop warning database can be pre-set by the operator according to actual needs.

[0190] For example, when the reason for stopping is charge / discharge temperature protection, the stop warning message will be four solid red lights. When the reason for stopping is low charging voltage or differential voltage protection, the stop warning message will be four flashing red lights.

[0191] S79: Combine the stop warning information and the power display information to determine the display adjustment information and output it.

[0192] Among them, display adjustment information refers to the adjustment information corresponding to the adjustment of display information.

[0193] By comparing the stop warning information with the power display information, the control information needed to adjust the display is determined and output as display adjustment information, thereby adjusting the display and making it convenient for users to understand in a timely manner.

[0194] Based on the same inventive concept, embodiments of the present invention provide a lithium battery management and control device, including a memory and a processor. The memory stores a computer program that can be loaded and executed by the processor as described above for a lithium battery management and control method.

[0195] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0196] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A lithium battery management and control method, characterized in that, include: S1: Collects the operating status and actual temperature value of the lithium battery; S2: Determine the state temperature value based on the operating state of the lithium battery; S3: Define the state temperature range based on the stated state temperature value; S4: By comparing the actual temperature value with the state temperature range, a temperature matching result is obtained; S5: Collect duration value and historical running status; S6: When the duration value exceeds the preset detection delay value, management control information is generated and output by combining the temperature matching result with the historical operating status; The method for generating the management and control information includes: S61: Determine whether the temperature matching result is within the preset normal range. S62: If yes, then collect the voltage value of a single lithium battery cell; S63: Calculate the maximum voltage difference based on the voltage value of the individual battery cell; S64: Determine the state reference voltage difference based on the operating state of the lithium battery; S65: Generate voltage reference control information by combining the maximum voltage difference, the state reference voltage difference, and the individual cell voltage value; S66: Generate status operation control information based on the historical operation status; S67: Combine the voltage reference control information with the state operation control information and use it as the management control information; S68: If not, output the preset operation stop control information as the management control information.

2. The lithium battery management and control method according to claim 1, characterized in that, The method for generating the voltage reference control information includes: S651: Determine the low-voltage reference value by comparing the voltage value of the individual battery cell with the preset low-voltage reference value; S652: Determine a voltage difference reference value based on the comparison result between the maximum voltage difference and the state reference voltage difference; S653: Determine a comprehensive reference value by combining the low-voltage reference value and the voltage difference reference value; S654: Generate voltage integrated control information based on the comprehensive reference value, as voltage reference control information.

3. The lithium battery management and control method according to claim 1, characterized in that, After outputting the management and control information, the following is also included: S71: Calculate the sum of the voltage values ​​of all the individual cells to obtain the overall voltage value; S72: Generate and output power display information based on the overall voltage value; S73: When the management control information is a preset charging operation control type, retrieve the operation control time value from the management control information; S74: Determine whether the operation control time value exceeds the preset charging duration value; S75: If yes, then by comparing the overall voltage value with the preset charging reference voltage value, determine the voltage display adjustment information and adjust the power display information; S76: If not, continue outputting the management and control information.

4. The lithium battery management and control method according to claim 3, characterized in that, Following the output of the management and control information, the following is also included: S761: When the overall voltage value is greater than the preset equalization voltage value, calculate the difference between the overall voltage value and the preset warning voltage value as the overall voltage deviation value; S762: Calculate the difference between the operation control time value and the preset charging duration value, and use it as the charging allowable time value; S763: Determine the equalization current value by combining the overall voltage deviation value and the charging allowance time value; S764: Collects the current charging current value; S765: Generate and output current adjustment control information based on the current charging current value and the equalization current value.

5. The lithium battery management and control method according to claim 3, characterized in that, After outputting the management and control information, the following is also included: S77: When the management control information is a preset stop control type, retrieve the stop reason information from the management control information; S78: Generate a stop warning message based on the stop reason information; S79: Combine the stop warning information and the power display information to determine the display adjustment information and output it.

6. The lithium battery management and control method according to claim 1, characterized in that, The method for determining the state temperature value includes: S21: Collect environmental monitoring information and lithium battery specifications; S22: Determine the specification test environment information and specification initial temperature information based on the lithium battery specifications; S23: Determine environmental deviation information by comparing the environmental detection information with the specification test environment information; S24: Select the initial specification temperature value from the initial specification temperature information based on the lithium battery operating status; S25: Generate an environmental deviation adjustment value by combining the environmental deviation information with the lithium battery operating status; S26: Adjust the initial specification temperature value using the environmental deviation adjustment value to obtain the specification adjustment temperature value and use it as the state temperature value.

7. The lithium battery management and control method according to claim 6, characterized in that, The method for generating the environmental deviation adjustment value includes: S251: Retrieve state type information from the lithium battery operating state; S252: Determine the temperature adjustment coefficient and humidity adjustment coefficient based on the aforementioned state type information; S253: Retrieve the temperature deviation value and humidity deviation value from the environmental deviation information; S254: Calculate the product of the temperature adjustment coefficient and the temperature deviation value, and use it as the temperature deviation adjustment value; S255: Calculate the product of the humidity adjustment coefficient and the humidity deviation value, and use it as the humidity deviation adjustment value; S256: Calculate the sum of the temperature deviation adjustment value and the humidity deviation adjustment value, and use it as the environmental deviation adjustment value.

8. The lithium battery management and control method according to claim 7, characterized in that, After calculating the temperature deviation adjustment value, the following is also included: S2541: Collect the actual detection location point corresponding to the actual temperature value; S2542: Determine the specification detection location point, reference distance value, and distance adjustment coefficient based on the lithium battery specifications; S2543: Calculate the distance between the actual detection location point and the specification detection location point, and use it as the detection location distance value; S2544: When the detection location distance value exceeds the reference distance value, the difference between the two is calculated as the distance deviation value; S2545: Calculate the product of the distance deviation value and the distance adjustment coefficient, and use it as the distance deviation adjustment value; S2546: Update the temperature deviation adjustment value using the distance deviation adjustment value.

9. A lithium battery management and control device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program and can be loaded and executed by the processor, as described in any one of claims 1 to 8, a lithium battery management and control method.

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