Method and system for simultaneously checking capacity of multiple groups of storage batteries

Abstract

The invention relates to a simultaneous capacity checking method and system for multiple groups of storage batteries, and relates to the field of battery capacity checking, and the method comprises the steps: 100, responding to a preset capacity checking signal, and calling a capacity checking number; 101, based on the capacity checking number, a rated current is called; step 102, determining a load current in response to the rated current; step 103, according to the load current, controlling a preset parallel module to adjust the current of the storage battery corresponding to the capacity checking number, and collecting a discharge voltage; step 104, determining the battery capacity based on the discharge voltage; and step 105, generating and displaying a storage battery capacity checking report in response to the battery capacity. The storage battery capacity checking device has the effects of improving the capacity checking efficiency of the storage battery and simultaneously checking the capacity of a plurality of storage batteries.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery core capacity, in particular to a method and system for simultaneously checking the capacity of multiple battery groups. BACKGROUND

[0002] The core capacity is full name of battery capacity checking test, the essence is to accurately detect the actual available capacity of the battery group by simulating the actual load discharge method, to judge whether it meets the design standard or the operation demand.

[0003] The substation DC power supply system is a device for providing stable power supply for all devices in the substation, and is the most critical guarantee for safe operation. The parallel DC power supply system of the substation connects several batteries in parallel to the DC bus. After applying the parallel DC power supply system, the open circuit or capacity reduction of the single battery has little effect on the backup time of the DC bus, and the related components can be replaced online quickly to ensure the operation of the DC bus and the reliability of the system.

[0004] The parallel DC power supply system has a large number of batteries, which can be as many as 32. When checking the capacity of the battery to ensure the reliability of the parallel DC system, the current conventional method is to check the capacity of No. 1 battery in the system, and then check the capacity of No. 2 battery after the capacity of the battery is checked. Check the capacity of the battery in the system until the capacity of the battery in the whole system is checked.

[0005] The capacity checking time of a group of batteries generally exceeds 10 hours, which leads to a long capacity checking time of the whole parallel DC power supply system, and further leads to a low capacity checking efficiency. SUMMARY

[0006] In order to improve the capacity checking efficiency of the battery, multiple batteries can be checked at the same time, and the present application provides a method and system for simultaneously checking the capacity of multiple battery groups.

[0007] In the first aspect, the present application provides a method for simultaneously checking the capacity of multiple battery groups, which adopts the following technical scheme: A method for simultaneously checking the capacity of multiple battery groups, comprising: Step 100: responding to a preset capacity checking signal to call a capacity checking number; Step 101: calling a rated current based on the capacity checking number; Step 102: determining a load current in response to the rated current; Step 103: controlling the preset parallel module to adjust the battery current corresponding to the capacity checking number according to the load current, and collecting the discharge voltage; Step 104: determining the battery capacity based on the discharge voltage; Step 105: generating and displaying a battery capacity checking report in response to the battery capacity.

[0008] By adopting the technical scheme, the output current values of the plurality of storage batteries are raised, so as to drive the plurality of storage batteries to preferentially supply power to the load, and the plurality of storage batteries are simultaneously subjected to capacity checking, thereby reducing the time for capacity checking of the entire parallel DC power supply system and improving the capacity checking efficiency of the storage batteries.

[0009] Optionally, the method further comprises: Step 106: acquiring a bus current; Step 107: determining a bus power according to the bus current, and calling a load power based on the capacity checking number; Step 108: when the bus power is not less than the load power, acquiring a charging voltage of the storage battery; Step 109: when the charging voltage is consistent with a preset floating charging voltage, issuing a capacity checking signal.

[0010] By adopting the technical scheme, the current of the bus is detected before the capacity checking of the storage battery, so as to determine the power of the load on the bus, and when the power of the load is not lower than the output power of the storage battery, it is determined that the current load can be subjected to capacity checking, so as to detect the charging state of the storage battery, and then the storage battery is subjected to capacity checking when the storage battery is fully charged, thereby improving the accuracy of the capacity checking result.

[0011] Optionally, the method further comprises: Step 110: when the charging voltage is consistent with the preset floating charging voltage, determining a capacity checking number according to the bus power and the load power; Step 111: determining a capacity checking sequence in combination with the capacity checking number and the capacity checking number; Step 112: generating a capacity checking process in response to the capacity checking sequence and the load current; Step 113: controlling the storage battery to discharge according to the capacity checking process, and updating the discharging voltage.

[0012] By adopting the technical scheme, the maximum number of simultaneous capacity checking of the bus is determined according to the power of the load, so as to plan a sequence of sequentially performing capacity checking on the storage battery according to the maximum number, thereby reducing the time for capacity checking of the entire parallel DC power supply system and improving the capacity checking efficiency of the storage battery.

[0013] Optionally, the method further comprises an electric quantity control method, and the electric quantity control method comprises: Step 200: when the charging voltage is consistent with the preset floating charging voltage, calling a storage capacity based on the capacity checking number; Step 201: determining a redundant electric quantity in combination with the storage capacity and the capacity checking sequence, and determining a lower limit of the electric quantity according to the bus power; Step 202: When the redundant power is less than the lower limit of the power, the difference between the lower limit of the power and the redundant power is calculated and defined as a power gap; Step 203: The redundant number is determined in combination with the power gap, the core capacity sequence and the storage capacity; Step 204: The core capacity sequence is updated according to the redundant number.

[0014] By adopting the technical solution, when the battery core capacity is completed, there is no electric energy in the battery, which leads to the difficulty of the battery after the core capacity in supplying power for the load on the bus, the minimum electric energy reserve ensuring the normal work of the load is selected according to the power of the load, thereby reducing the number of batteries simultaneously undergoing core capacity when the remaining electric energy of the parallel DC power supply system is insufficient, and further improving the stability of the parallel DC power supply system.

[0015] Optionally, the power control method further comprises: Step 205: When the redundant power is less than the lower limit of the power, the redundant number is determined according to the core capacity sequence; Step 206: If the redundant number is equal to 0, the idle capacity is determined in combination with the redundant number and the storage capacity; Step 207: The difference between the lower limit of the power and the idle capacity is calculated and defined as a supplementary power; Step 208: The charging number is determined according to the supplementary power and the bus power; Step 209: The charging number is determined in combination with the charging number, the redundant number and the core capacity number; Step 210: The external power supply is controlled to supply power to the bus according to the charging number.

[0016] By adopting the technical solution, the total power of the parallel DC power supply system is calculated in real time, so that when the total power is insufficient to support the normal work of the load, the external power supply is connected to the parallel DC power supply system, thereby improving the stability of the parallel DC power supply system.

[0017] Optionally, the load adjustment method comprises: Step 300: When the bus power is less than the load power, the core capacity current is determined according to the bus power; Step 301: The quotient of the core capacity current and the rated current is calculated and defined as a current coefficient; Step 302: The calibration coefficient is determined in response to the current coefficient, and the calibration number is determined based on the core capacity current; Step 303: The battery corresponding to the calibration number is controlled to discharge according to the core capacity current, and the discharge voltage is updated; Step 304: The calibration capacity is determined based on the discharge voltage; Step 305: calculate the product of the calibration capacity and the calibration coefficient, and define as the battery capacity.

[0018] By adopting the technical scheme, when the power of the load is insufficient to undertake the nuclear capacity, the current size of the battery discharge is selected according to the power size of the load, so as to reduce the power of the battery discharge, and the nuclear capacity result is corrected according to the current size of the discharge, thereby improving the convenience of the battery nuclear capacity.

[0019] Optionally, the load adjustment method further comprises: Step 306: when the busbar power is not less than the load power, determine the nuclear capacity voltage based on the nuclear capacity sequence; Step 307: determine the nuclear capacity duration in combination with the nuclear capacity voltage and the load power; Step 308: determine the sequence duration according to the nuclear capacity duration; Step 309: calculate the difference between the sequence duration and the nuclear capacity duration, and define as the waiting duration; Step 310: determine the limit capacity in response to the waiting duration and the load power; Step 311: select the replacement number from the nuclear capacity number according to the limit capacity and the load power; Step 312: generate and display the nuclear capacity replacement suggestion in response to the replacement number.

[0020] By adopting the technical scheme, the nuclear capacity duration required by the battery with different capacity is different, when the battery with smaller capacity completes the nuclear capacity, the appropriate battery is selected to replace the battery completing the nuclear capacity according to the nuclear capacity duration required by the battery performing the nuclear capacity in the same batch and the load power occupied by the battery completing the nuclear capacity, thereby improving the efficiency of the battery nuclear capacity.

[0021] Optionally, the load adjustment method further comprises: Step 313: when the replacement number is empty, calculate the sum of the load power and the preset idle power, and define as the idle power; Step 314: update the limit capacity and the replacement number in response to the waiting duration and the idle power; Step 315: determine the replacement power based on the replacement number; Step 316: calculate the difference between the idle power and the rated power, and define as the idle power.

[0022] By adopting the technical scheme, the load power occupied by the battery completing the nuclear capacity is accumulated, so as to select the battery with larger power to replace the battery completing the nuclear capacity to perform the nuclear capacity, thereby reducing the idle situation of the load power and improving the efficiency of the battery nuclear capacity.

[0023] Optionally, the load regulation method further comprises: Step 317: when the replacement number is not empty, determining the replacement current according to the waiting time length; Step 318: calculating the quotient of the replacement current and the rated current, and defining as the replacement coefficient; Step 319: when the replacement coefficient exceeds the preset replacement interval, determining the replacement threshold value in combination with the replacement coefficient and the preset replacement interval; Step 320: calculating the product of the replacement threshold value and the rated current, and defining as the limit current; Step 321: updating the limit capacity and the replacement number in response to the limit current, the waiting time length and the idle power.

[0024] By adopting the above technical solution, when the required capacity of the batteries in the same batch is short, the replacement battery is required to release a larger current within a limited time, which further leads to a larger error in the calculated battery capacity. Therefore, appropriate batteries to be tested are selected according to the capacity and current value.

[0025] In a second aspect, the application provides a system for simultaneously determining the capacity of multiple groups of batteries, which adopts the following technical solution: A system for simultaneously determining the capacity of multiple groups of batteries, comprising: a collection module for collecting discharge voltage, bus current and state of charge; a memory for storing the program of any of the above methods for simultaneously determining the capacity of multiple groups of batteries; a processor, the program in the memory can be loaded and executed by the processor.

[0026] By adopting the above technical solution, the output current value of the multiple batteries is raised, thereby driving the multiple batteries to preferentially supply power to the load, and further simultaneously determining the capacity of the multiple batteries, reducing the time for determining the capacity of the entire parallel DC power supply system, and improving the efficiency of battery capacity determination.

[0027] In summary, the application includes at least one of the following beneficial technical effects: 1. The output current value of the multiple batteries is raised, thereby driving the multiple batteries to preferentially supply power to the load, and further simultaneously determining the capacity of the multiple batteries, reducing the time for determining the capacity of the entire parallel DC power supply system, and improving the efficiency of battery capacity determination. 2. The output current value of the multiple batteries is raised, thereby driving the multiple batteries to preferentially supply power to the load, and further simultaneously determining the capacity of the multiple batteries, reducing the time for determining the capacity of the entire parallel DC power supply system, and improving the efficiency of battery capacity determination. 3. The output current value of the plurality of storage batteries is lifted, so as to drive the plurality of storage batteries to preferentially supply power to the load, and then the plurality of storage batteries are simultaneously subjected to capacity checking, the time for capacity checking the whole parallel DC power supply system is reduced, and the efficiency of capacity checking the storage batteries is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a flowchart of a plurality of storage batteries simultaneously subjected to capacity checking method; Figure 2 It is a flowchart of the power control method; Figure 3 It is a flowchart of the load adjustment method. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0030] Referring to Figure 1 A plurality of storage batteries simultaneously subjected to capacity checking method, comprising: Step 100: responding to the preset capacity checking signal to call the capacity checking number.

[0031] The capacity checking signal refers to a signal sent when the storage battery can be subjected to capacity checking, and the capacity checking signal triggering mode is selected by the staff according to the actual situation, which is not described herein. The capacity checking number refers to the storage battery number that needs to be subjected to capacity checking, and each capacity checking number corresponds to a storage battery. The capacity checking number can be queried from the capacity checking record table, and the capacity checking record table refers to a data table recording different capacity checking numbers and corresponding storage battery parameters, wherein the storage battery parameters include the rated current, rated voltage, rated power, standard capacity, residual power and working temperature of the storage battery.

[0032] Step 101: calling the rated current based on the capacity checking number.

[0033] The rated current is the current value normally output by the storage battery, and the rated current corresponding to the capacity checking number can be queried from the capacity checking record table.

[0034] Step 102: determining the load current in response to the rated current.

[0035] The load current refers to the current value needed to be lifted to drive the storage battery to supply power to the load on the bus, for example, the load current of 19.9A is generally used for 12V storage battery, and the load current corresponding to the rated current can be queried from the load corresponding table, and the load corresponding table refers to a data table recording different rated currents and corresponding load currents.

[0036] Step 103: Adjust the battery current corresponding to the core capacity number according to the preset parallel module load current control, and collect the discharge voltage.

[0037] The parallel module refers to a device for controlling the output and input current of the battery, and the parallel module includes an EMI filter circuit, an APFC boost circuit, and a DC / DC conversion circuit. The parallel module is connected with the mains, the battery, and the bus, respectively. The bus is generally 220V DC. The mains can be filtered through the EMI filter circuit first, and then converted from 220V AC mains to 400V DC through the APFC boost circuit. The 400V DC is converted to 220V DC through the DC / DC conversion circuit to output to the load on the bus. At the same time, the DC / DC conversion circuit converts the 400V DC to 12V DC to charge the battery. When the mains input is disconnected, the DC / DC conversion circuit converts the 12V DC of the battery to 220V DC to output to the load on the bus. The parallel module communicates with the control terminal through RS485. The current and voltage values of the battery input to the bus can be adjusted through the control terminal. The parallel module is selected by the staff according to the actual situation, and will not be described here.

[0038] For example, the voltage of the 12V battery can be adjusted to about 220V through the parallel module, and the discharge current of the battery is preferentially ensured to be 19.9A. The excess load is evenly supplied by other batteries.

[0039] The discharge voltage is the real-time voltage value of the battery during discharge. The discharge voltage can be collected by the parallel module. The collection method of the discharge voltage is selected by the staff according to the actual situation, and will not be described here.

[0040] Step 104: Determine the battery capacity based on the discharge voltage.

[0041] The battery capacity refers to the electrical energy capacity of the battery. When the electrical energy of the battery is exhausted, its output voltage tends to decrease. For example, the voltage of a 12V battery tends to decrease to 10.8V after the electrical energy is exhausted. The discharge duration of the 12V battery to be tested for capacity from discharge to voltage of 10.8V is calculated, and the product of the discharge duration and the rated current is calculated as the battery capacity. The determination method of the battery capacity is known to those skilled in the art, and will not be described here.

[0042] Step 105: Generate and display a battery capacity report in response to the battery capacity.

[0043] The battery capacity report refers to information for showing the capacity of the battery to the staff. The generation method of the battery capacity report is known to those skilled in the art, and will not be described here.

[0044] The output current value of the plurality of storage batteries is lifted, so as to drive the plurality of storage batteries to preferentially supply power to the load, and then the plurality of storage batteries are simultaneously subjected to capacity checking, the time for checking the capacity of the entire parallel DC power supply system is reduced, and the capacity checking efficiency of the storage batteries is improved.

[0045] A method for simultaneously checking the capacity of multiple groups of storage batteries, further comprising: Step 106: collecting the bus current.

[0046] The bus current refers to the real-time current value of the bus, which can be collected by the parallel module. The collection method of the bus current is selected by the staff according to the actual situation, and is not described here.

[0047] Step 107: determining the bus power according to the bus current, and calling the load power based on the capacity checking number.

[0048] The bus power refers to the total power value of the load on the bus, which can be calculated as the product of the bus current and 220. The calculation method of the bus power is known to those skilled in the art, and is not described here.

[0049] The load power is the rated power of the storage battery, which can be obtained from the capacity checking record table.

[0050] Step 108: When the bus power is not less than the load power, collect the charging voltage of the storage battery.

[0051] The bus power not less than the load power represents that the load meets the demand of single storage battery capacity checking. When capacity checking, the storage battery needs to discharge preferentially to the load through "current lifting". If the load power is insufficient, the storage battery cannot release the rated current, thereby causing the capacity checking time to be prolonged and the capacity calculation to be deviated. The charging voltage refers to the voltage value of the storage battery when charging the storage battery through the commercial power supply. The charging voltage can be collected by the parallel module. The collection method of the charging voltage is selected by the staff according to the actual situation, and is not described here.

[0052] Step 109: When the charging voltage is consistent with the preset floating charging voltage, a capacity checking signal is sent out.

[0053] The floating charging voltage refers to the voltage value of the storage battery when it reaches the floating state. For example, the floating charging voltage of a 12V storage battery is 13.5V. The floating charging voltage is selected by the staff according to the actual situation, and is not described here. The charging voltage consistent with the floating charging voltage represents that the storage battery enters the floating state, and capacity checking can be performed at this time.

[0054] The current of the bus is detected before battery capacity is detected, so that the power of the load on the bus is determined, and when the power of the load is not lower than the output power of the battery, it is determined that the current load capacity can be used for capacity detection, so that the state of charge of the battery is detected, and then the battery capacity is detected when the battery is fully charged, thereby improving the accuracy of the capacity detection result.

[0055] A method for simultaneously detecting the capacity of a plurality of batteries, further comprising: Step 110: When the charging voltage is consistent with the preset floating charging voltage, the number of capacity detection is determined according to the bus power and the load power.

[0056] The number of capacity detection refers to the number of batteries that can simultaneously bear the maximum capacity of the load. The quotient of the bus power and the load power can be calculated and rounded to the nearest whole number as the number of capacity detection. The method for calculating the number of capacity detection is well known in the art and will not be described here.

[0057] Step 111: Determine the capacity detection sequence in combination with the number of capacity detection and the capacity detection number.

[0058] The capacity detection sequence refers to the order of batch capacity detection according to the number of capacity detection. The number of capacity detection numbers can be counted as the number of numbers, and the quotient of the number of numbers and the number of capacity detection can be calculated and rounded to the nearest whole number as the number of batches. Finally, the quotient of the number of numbers and the number of batches is calculated as the number of batches for capacity detection, and the batteries are arranged in sequence for capacity detection according to the number of batches.

[0059] Step 112: Generate a capacity detection process in response to the capacity detection sequence and the load current.

[0060] The capacity detection process is a process of sequentially detecting the capacity of the battery according to the capacity detection sequence and the load current. The method for determining the capacity detection process is well known in the art and will not be described here.

[0061] Step 113: Control the discharge of the battery according to the capacity detection process, and update the discharge voltage.

[0062] The maximum number of simultaneous capacity detection that the bus can bear is determined according to the power of the load, so that the order of sequentially detecting the capacity of the battery according to the maximum number is planned, thereby reducing the time for detecting the capacity of the entire parallel DC power supply system, and improving the efficiency of battery capacity detection.

[0063] Referring to Figure 2 , the power control method comprises: Step 200: When the charging voltage is consistent with the preset floating charging voltage, the capacity of the battery is retrieved based on the capacity detection number.

[0064] The capacity of the battery refers to the remaining power in the battery. The remaining power corresponding to the capacity detection number can be queried from the capacity detection record table as the capacity of the battery.

[0065] Step 201: determine the redundant power based on the battery capacity and the nuclear capacity sequence, and determine the lower limit of the power based on the bus power.

[0066] The redundant power refers to the sum of the battery capacity in the remaining battery except the nuclear capacity sequence. The calculation method of the redundant power is well known to those skilled in the art, and will not be repeated here.

[0067] The lower limit of the power refers to the minimum power reserve required to ensure continuous operation of the load. The lower limit of the power corresponding to the bus power can be queried from the lower limit corresponding table. The lower limit corresponding table refers to a data table recording different bus powers and their corresponding lower limits of the power.

[0068] Step 202: when the redundant power is less than the lower limit of the power, calculate the difference between the lower limit of the power and the redundant power, and define it as the power gap.

[0069] The redundant power being less than the lower limit of the power means that the remaining power of the parallel DC power supply system is insufficient to support the load when the battery for nuclear capacity suddenly loses power. At this time, the number of batteries for nuclear capacity needs to be reduced. The power gap refers to the power lacking in the parallel DC power supply system. The calculation method of the power gap is well known to those skilled in the art, and will not be repeated here.

[0070] Step 203: determine the redundant number based on the power gap, the nuclear capacity sequence, and the battery capacity.

[0071] The redundant number refers to the number of batteries selected from the nuclear capacity sequence that do not perform nuclear capacity. The battery capacity of each battery in the nuclear capacity sequence can be queried, and the number of batteries with a sum of battery capacity that is just greater than the power gap is selected as the redundant number. The determination method of the redundant number is well known to those skilled in the art, and will not be repeated here.

[0072] Step 204: update the nuclear capacity sequence based on the redundant number.

[0073] When the battery nuclear capacity is completed, there is no power in the battery, which makes it difficult for the battery after nuclear capacity to supply power to the load on the bus. The minimum power reserve required to ensure normal operation of the load is selected according to the power of the load, thereby reducing the number of batteries for nuclear capacity when the remaining power of the parallel DC power supply system is insufficient, and thereby improving the stability of the parallel DC power supply system.

[0074] The power control method further comprises: Step 205: when the redundant power is less than the lower limit of the power, determine the redundant number based on the nuclear capacity sequence.

[0075] The redundancy quantity refers to the number of remaining nuclear capacity numbers in the nuclear capacity sequence after the redundancy number is deleted from the nuclear capacity sequence, and the determination method of the redundancy quantity is well known to those skilled in the art, which will not be repeated here.

[0076] Step 206: If the redundancy quantity is equal to 0, the idle capacity is determined in combination with the redundancy number and the storage capacity.

[0077] The redundancy quantity equal to 0 represents that the remaining power of the parallel DC power supply system is insufficient to bear the load work, and the idle capacity refers to the sum of the storage capacities corresponding to the batteries other than the redundancy number, and the determination method of the idle capacity is well known to those skilled in the art, which will not be repeated here.

[0078] Step 207: Calculate the difference between the lower limit of the electric quantity and the idle capacity, and define it as the supplementary electric quantity.

[0079] The supplementary electric quantity refers to the electric quantity value that needs to be supplemented by the parallel DC power supply system, and the calculation method of the supplementary electric quantity is well known to those skilled in the art, which will not be repeated here.

[0080] Step 208: Determine the charging quantity according to the supplementary electric quantity and the busbar power.

[0081] The charging quantity refers to the number of external power sources that need to be connected, and in this embodiment, the quotient of the supplementary electric quantity and the busbar power is calculated and rounded up as the charging quantity. The calculation method of the charging quantity is well known to those skilled in the art, which will not be repeated here.

[0082] Step 209: Determine the charging number in combination with the charging quantity, the redundancy number and the nuclear capacity number.

[0083] The charging number refers to the battery number of the external power source connected to the busbar, and the nuclear capacity number other than the redundancy number can be selected as the charging number according to the charging quantity. The determination method of the charging number is selected by the staff according to the actual situation, which will not be repeated here.

[0084] Step 210: Control the external power supply to supply power to the busbar according to the charging number.

[0085] The city power is directly supplied to the busbar through the parallel module control, thereby reducing the situation that the load stops working due to the loss of power of the battery during the nuclear capacity.

[0086] The total electric quantity of the parallel DC power supply system is calculated in real time, so that when the total electric quantity is insufficient to bear the normal work of the load, the external power source is connected to the parallel DC power supply system, thereby improving the stability of the parallel DC power supply system.

[0087] Reference Figure 3 The load adjustment method comprises the following steps: Step 300: determining a core capacity current according to the busbar power when the busbar power is less than the load power.

[0088] The busbar power less than the load power represents that the load on the busbar does not meet the requirement of a single battery core capacity, and the core capacity current refers to an output current when the output power of the battery is equal to the busbar power. The quotient of the busbar power and a core capacity voltage can be calculated as the core capacity current, wherein the core capacity voltage refers to the voltage of the battery to be core capacity.

[0089] Step 301: calculating the quotient of the core capacity current and the rated current, and defining as a current coefficient.

[0090] The current coefficient refers to a value for showing the gap between the core capacity current and the rated current.

[0091] Step 302: determining a calibration coefficient in response to the current coefficient, and determining a calibration number based on the core capacity current.

[0092] The calibration coefficient refers to a coefficient for calibrating the battery capacity. When the output current of the battery deviates too much from the rated current, the calculated battery capacity is prone to deviation. The calibration coefficient corresponding to the current coefficient can be queried from a calibration correspondence table, wherein the calibration correspondence table refers to a data table recording different current coefficients and calibration coefficients corresponding thereto.

[0093] The calibration number refers to the core capacity number of the battery with the same voltage as the core capacity voltage. The determination method of the calibration number is well known to those skilled in the art, and is not described here.

[0094] Step 303: discharging the battery corresponding to the calibration number according to the core capacity current, and updating the discharge voltage.

[0095] The batteries corresponding to the calibration numbers are sequentially controlled to discharge, so as to obtain the capacity of the battery to be core capacity.

[0096] Step 304: determining a calibration capacity based on the discharge voltage.

[0097] The calibration capacity refers to the battery capacity calculated according to the discharge voltage. The calculation method of the calibration capacity is referred to the above step 104, and is not described here.

[0098] Step 305: calculating the product of the calibration capacity and the calibration coefficient, and defining as the battery capacity.

[0099] When the power of the load is insufficient to undertake the core capacity, the current size of the battery discharge is selected according to the power size of the load, so as to reduce the power of the battery discharge, and the core capacity result is corrected according to the current size of the discharge, thereby improving the convenience of the battery core capacity.

[0100] The load adjustment method further comprises: Step 306: determining the nuclear capacity voltage based on the nuclear capacity sequence when the busbar power is not less than the load power.

[0101] The nuclear capacity voltage refers to the rated voltage of the battery in the nuclear capacity sequence, which can be queried from the nuclear capacity record table corresponding to the nuclear capacity sequence.

[0102] Step 307: determining the nuclear capacity duration in combination with the nuclear capacity voltage and the load power.

[0103] The nuclear capacity duration refers to the duration required by the nuclear capacity battery, which can be queried from the duration corresponding table corresponding to the nuclear capacity voltage and the load power. The duration corresponding table refers to a data table recording different nuclear capacity voltages and load powers and their corresponding nuclear capacity durations.

[0104] Step 308: determining the sequence duration according to the nuclear capacity duration.

[0105] The sequence duration refers to the maximum value in the combined duration, and the determination method of the sequence duration is known to those skilled in the art, which will not be described here.

[0106] Step 309: calculating the difference between the sequence duration and the nuclear capacity duration, and defining it as the waiting duration.

[0107] The waiting duration refers to the duration required from the completion of the battery nuclear capacity to the nuclear capacity of all batteries in the same nuclear capacity sequence. The calculation method of the waiting duration is known to those skilled in the art, which will not be described here.

[0108] Step 310: determining the limit capacity in response to the waiting duration and the load power.

[0109] The limit capacity refers to the maximum electrical energy that can be released according to the load power within the waiting duration. The calculation method of the limit capacity is known to those skilled in the art, which will not be described here.

[0110] Step 311: selecting the replacement number from the nuclear capacity number according to the limit capacity and the load power.

[0111] The replacement number is the battery number whose standard capacity is lower than the limit capacity. The standard capacity corresponding to the nuclear capacity number whose rated power is lower than the load power can be queried from the nuclear capacity record table. Then, the nuclear capacity number corresponding to the standard capacity closest to the limit capacity and lower than the limit capacity is selected as the replacement number.

[0112] Step 312: generating and displaying the nuclear capacity replacement suggestion in response to the replacement number.

[0113] The core capacity replacement suggestion refers to information for showing a replacement number to a worker, and whether the worker needs to replace a battery that has completed core capacity by the core capacity replacement suggestion. The determination method of the core capacity replacement suggestion is common knowledge to those skilled in the art, and is not described herein.

[0114] Different capacity batteries require different core capacity time. When a smaller capacity battery completes core capacity, a suitable battery is selected to replace the battery that has completed core capacity according to the core capacity time required by the battery in the same batch and the load power occupied by the battery that has completed core capacity, thereby improving the efficiency of battery core capacity.

[0115] The load adjustment method further comprises: Step 313: When the replacement number is empty, the sum of the load power and the preset idle power is calculated and defined as the idle power.

[0116] The replacement number being empty means that there is no battery that can replace the battery that has completed core capacity. The idle power refers to the power value divided by other batteries that have not completed core capacity on the busbar power. The sum of the load powers of the batteries in the core capacity sequence can be calculated as the core capacity power, and the difference between the busbar power and the core capacity power can be calculated as the idle power. When the battery completes core capacity, the power occupied by the battery that has completed core capacity is released as idle power.

[0117] Step 314: Updating the limit capacity and the replacement number in response to the waiting time and the idle power.

[0118] The limit capacity and the replacement number are found according to the limit power and the waiting time. The determination method of the limit capacity and the replacement number is referred to the above steps 310 and 311, and is not described herein.

[0119] Step 315: Determining the replacement power based on the replacement number.

[0120] The replacement power is the rated power of the battery corresponding to the replacement number, which can be queried from the core capacity record table.

[0121] Step 316: Calculating the difference between the idle power and the replacement power, and defining it as the idle power.

[0122] The load power occupied by the battery that has completed core capacity is accumulated, so that a battery with larger transmission power is selected to replace the battery that has completed core capacity for core capacity, thereby reducing the idle situation of the load power and improving the efficiency of battery core capacity.

[0123] The load adjustment method further comprises: Step 317: When the replacement number is not empty, determining the replacement current according to the waiting time.

[0124] A non-empty replacement number indicates that there is a battery available to replace the battery whose capacity has been approved. The replacement current refers to the current required for the battery corresponding to the replacement number to exhaust its power within the waiting time. The standard capacity corresponding to the replacement number can be found in the capacity record table, and the quotient of the standard capacity and the waiting time can be calculated as the replacement current.

[0125] Step 318: Calculate the quotient of the replacement current and the rated current, and define it as the substitution coefficient.

[0126] The substitution factor is a value used to represent the difference between the replacement current and the rated current. The greater the substitution factor deviates from 1, the greater the deviation of the replacement current from the rated current, and the greater the error in the battery capacity calculated based on the replacement current.

[0127] Step 319: When the replacement coefficient exceeds the preset replacement interval, determine the replacement threshold by combining the replacement coefficient and the preset replacement interval.

[0128] The replacement range refers to the range of replacement coefficients where the battery capacity calculation error is too large. The replacement range is selected by the staff based on the actual situation and will not be elaborated here. If the replacement coefficient exceeds the replacement range, it means that the battery capacity calculation error is too large. The replacement threshold is the value of the replacement range closest to the replacement coefficient. When the replacement coefficient is higher than the replacement range, the upper limit of the replacement range is used as the replacement threshold; when the replacement coefficient is lower than the replacement range, the lower limit of the replacement range is used as the replacement threshold.

[0129] Step 320: Calculate the product of the replacement threshold and the rated current, and define it as the limiting current.

[0130] The limiting current refers to the maximum output current value with a small error in battery capacity. The calculation method of the limiting current is common knowledge to those in the field and will not be elaborated here.

[0131] Step 321: Update the limit capacity and succession number in response to the limit current, waiting time and idle power.

[0132] At this point, the product of the limiting current and the waiting time can be calculated as the limiting capacity, and the replacement number can be selected according to step 311. The method for determining the replacement number will not be elaborated here.

[0133] When the required capacity testing time for batteries in the same batch is short, the current that the replacement battery needs to release within a limited time is likely to be large, which in turn leads to a large error in the calculated battery capacity. Therefore, it is necessary to select a suitable battery to be tested according to the capacity testing time and current value.

[0134] Based on the same inventive concept, embodiments of the present invention provide a system for simultaneous capacity verification of multiple battery banks, comprising: The collecting module is used for collecting the discharge voltage, the bus current and the state of charge; The memory is used for storing the program of the above-mentioned any one of the multiple groups of storage battery simultaneous capacity checking methods; The processor, the program in the memory can be loaded and executed by the processor.

[0135] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional module is taken as an example, in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the above-mentioned system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0136] The above-mentioned is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiment only, any technical scheme belonging to the idea of the present application is also within the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A method for simultaneously calibrating the capacity of multiple battery banks, characterized in that, include: Step 100: Retrieve the capacity number in response to the preset capacity signal; Step 101: Retrieve the rated current based on the capacity number; Step 102: Determine the load current in response to the rated current; Step 103: Adjust the battery current corresponding to the capacity number according to the preset parallel module controlled by the load current, and collect the discharge voltage; Step 104: Determine the battery capacity based on the discharge voltage; Step 105: In response to the battery capacity generation, a battery capacity report is displayed.

2. The method for simultaneous capacity verification of multiple battery banks according to claim 1, characterized in that, Also includes: Step 106: Collect bus current; Step 107: Determine the bus power based on the bus current, and retrieve the load power based on the capacity number; Step 108: When the bus power is not less than the load power, collect the battery charging voltage; Step 109: When the charging voltage is consistent with the preset float charging voltage, a capacity verification signal is issued.

3. The method for simultaneous capacity verification of multiple battery banks according to claim 2, characterized in that, Also includes: Step 110: When the charging voltage is consistent with the preset float charging voltage, determine the number of units to be filled based on the bus power and load power; Step 111: Determine the kernel sequence by combining the number of kernels and the kernel number; Step 112: Generate a core capacity process in response to the core capacity sequence and load current; Step 113: Control the battery discharge according to the core capacity process and update the discharge voltage.

4. The method for simultaneous capacity assessment of multiple battery banks according to claim 3, characterized in that, It also includes a power control method, the power control method comprising: Step 200: When the charging voltage is consistent with the preset float charging voltage, retrieve the energy storage capacity based on the core capacity number; Step 201: Determine the redundant power capacity by combining the energy storage capacity and the core capacity sequence, and determine the lower limit of the power capacity according to the bus power; Step 202: When the redundant power is less than the lower power limit, calculate the difference between the lower power limit and the redundant power, and define it as the power difference; Step 203: Determine the redundancy number by combining the power difference, core capacity sequence, and storage capacity; Step 204: Update the kernel capacity sequence according to the redundancy number.

5. The method for simultaneous capacity verification of multiple battery banks according to claim 4, characterized in that, The power control method further includes: Step 205: When the redundant power is less than the lower limit of power, determine the amount of redundancy according to the core capacity sequence; Step 206: If the number of redundancies is equal to 0, determine the idle capacity by combining the redundancy number and the energy storage capacity; Step 207: Calculate the difference between the lower limit of power and the idle capacity, and define it as the replenished power; Step 208: Determine the charging quantity based on the replenished power and bus power; Step 209: Determine the charging number by combining the charging quantity, redundancy number, and capacity number; Step 210: Control the external power supply to transmit power to the bus according to the charging number.

6. The method for simultaneous capacity verification of multiple battery banks according to claim 5, characterized in that, It also includes a load conditioning method, the load conditioning method comprising: Step 300: When the bus power is less than the load power, determine the core current based on the bus power; Step 301: Calculate the quotient of the core current and the rated current, and define it as the current coefficient; Step 302: Determine the calibration coefficient in response to the current coefficient, and determine the calibration number based on the core capacitance current; Step 303: Control the battery corresponding to the calibration number to discharge according to the core capacity current, and update the discharge voltage; Step 304: Determine the calibration capacity based on the discharge voltage; Step 305: Calculate the product of the calibration capacity and the calibration coefficient, and define it as the battery capacity.

7. The method for simultaneous capacity assessment of multiple battery banks according to claim 6, characterized in that, The load adjustment method further includes: Step 306: When the bus power is not less than the load power, determine the capacitance voltage based on the capacitance sequence; Step 307: Determine the capacitance duration based on the capacitance voltage and load power; Step 308: Determine the sequence duration based on the nuclear capacity duration; Step 309: Calculate the difference between the sequence duration and the kernel capacity duration, and define it as the waiting time; Step 310: Determine the limit capacity in response to the waiting time and load power; Step 311: Select a replacement number from the approved capacity numbering based on the maximum capacity and load power; Step 312: In response to the succession number, generate and display the capacity succession proposal.

8. The method for simultaneous capacity verification of multiple battery banks according to claim 7, characterized in that, The load adjustment method further includes: Step 313: When the replacement number is empty, calculate the sum of the load power and the preset idle power, and define it as the idle power; Step 314: Update the limit capacity and replacement number in response to the waiting time and idle power; Step 315: Determine the succession power based on the succession number; Step 316: Calculate the difference between the idle power and the rated power, and define it as the idle power.

9. The method for simultaneous capacity verification of multiple battery banks according to claim 8, characterized in that, The load adjustment method further includes: Step 317: When the replacement number is not empty, determine the replacement current according to the waiting time; Step 318: Calculate the quotient of the replacement current and the rated current, and define it as the substitution coefficient; Step 319: When the replacement coefficient exceeds the preset replacement interval, determine the replacement threshold by combining the replacement coefficient and the preset replacement interval; Step 320: Calculate the product of the replacement threshold and the rated current, and define it as the limiting current; Step 321: Update the limit capacity and succession number in response to the limit current, waiting time and idle power.

10. A system for simultaneous capacity verification of multiple battery banks, characterized in that, include: The data acquisition module is used to collect discharge voltage, bus current, and charging status. A memory for storing a program for a method of simultaneously accumulating capacity of multiple groups of batteries as described in any one of claims 1 to 9; The processor is the unit of memory that allows programs to be loaded and executed by the processor.

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