Display SOC calculation method, battery system and storage medium
By obtaining the baseline capacity and current displayed SOC when the working state of the battery system meets the preset conditions, and calculating the target displayed SOC based on the capacity change value, the problems of cumbersome calculation and large errors in displayed SOC calculations in the existing technology are solved, and a more efficient solution is achieved. Accurate and efficient display of SOC calculations.
Patent Information
- Application Number
- CN202411474126.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-01-24
AI Technical Summary
The existing display SOC calculation method is complicated when processing a large amount of data, resulting in large errors in the final determination of display SOC.
By obtaining the baseline capacity and current displayed SOC when the working state of the battery system meets the preset conditions; obtaining the capacity change value according to the preset display period; and calculating the target displayed SOC based on the baseline capacity, current displayed SOC and capacity change value.
The accurate calculation of the battery system display SOC is implemented, the data processing process is simplified, the amount of data processing is reduced, and the accuracy of calculation is improved.
Smart Images
Figure CN119355554A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a method for calculating a display SOC, a battery system and a storage medium. Background Art
[0002] The displayed SOC indicates the state of charge that can be discharged by the battery system within the specified discharge range, and is the percentage of charge displayed to the user by the battery management system. Therefore, the accuracy of the displayed SOC affects the judgment of the state of charge that can be discharged by the energy storage system.
[0003] At present, in the existing display SOC calculation method, the display SOC is usually calculated by calculating the SOC of each single battery cell, and then obtaining the maximum SOC and minimum SOC of the entire system to infer the display SOC. However, the amount of data processed is large and the data processing process is cumbersome, resulting in large errors in the final display SOC. Summary of the invention
[0004] Based on this, a display SOC calculation method, a battery system and a storage medium are provided.
[0005] In a first aspect, the present application provides a method for calculating a display SOC, comprising the following steps:
[0006] When the working state of the battery system meets the preset conditions, the reference capacity and the currently displayed SOC of the battery system are obtained;
[0007] According to the preset display cycle, obtain the capacity change value of the battery system;
[0008] According to the reference capacity, the current displayed SOC and the capacity change value, the target displayed SOC of the corresponding battery system is obtained.
[0009] In one embodiment, when the working state of the battery system meets the preset conditions, the step of obtaining the reference capacity and the currently displayed SOC of the battery system includes:
[0010] When the charging voltage of the battery system is less than the charging cut-off voltage, the charging reference capacity and the current charging display SOC of the battery system are obtained;
[0011] The steps of obtaining the target displayed SOC of the corresponding battery system according to the reference capacity, the current displayed SOC and the capacity change value include:
[0012] According to the charging reference capacity, the current charging display SOC and the capacity change value, the target charging display SOC of the corresponding battery system is obtained.
[0013] In one embodiment, when the working state of the battery system meets the preset conditions, the step of obtaining the reference capacity and the currently displayed SOC of the battery system further includes:
[0014] When the discharge voltage of the battery system is greater than the discharge cut-off voltage, the discharge reference capacity and the current discharge display SOC of the battery system are obtained;
[0015] The steps of obtaining the target displayed SOC of the corresponding battery system according to the reference capacity, the current displayed SOC and the capacity change value include:
[0016] According to the discharge reference capacity, the current discharge display SOC and the capacity change value, the target discharge display SOC of the corresponding battery system is obtained.
[0017] In one embodiment, the step of obtaining a target charging display SOC of a corresponding battery system according to the charging reference capacity, the current charging display SOC and the capacity change value comprises:
[0018] Dividing the capacity change value by the charging reference capacity to obtain a first SOC change value;
[0019] The first SOC change value and the current charging display SOC are added to obtain a target charging display SOC.
[0020] In one embodiment, the step of obtaining a target discharge display SOC of a corresponding battery system according to the discharge reference capacity, the current discharge display SOC and the capacity change value comprises:
[0021] Dividing the capacity change value by the discharge reference capacity to obtain a second SOC change value;
[0022] The current discharge display SOC and the second SOC change value are subjected to difference processing to obtain the target discharge display SOC.
[0023] In one embodiment, the step of obtaining the current charge display SOC of the battery system includes:
[0024] Obtaining a current first remaining capacity of the battery system;
[0025] The current first remaining capacity is divided by the charging reference capacity to obtain the current charging display SOC.
[0026] In one embodiment, the step of obtaining the current discharge display SOC of the battery system includes:
[0027] Obtaining the current second remaining capacity of the battery system;
[0028] The current second remaining capacity is divided by the discharge reference capacity to obtain the current discharge display SOC.
[0029] In one embodiment, the step of obtaining a charging reference capacity of the battery system includes:
[0030] Get the full charge capacity of at least the last two times;
[0031] The average value of each full charge capacity is processed to obtain the charging reference capacity.
[0032] In one embodiment, the step of obtaining a discharge reference capacity of the battery system includes:
[0033] Get at least the last two full discharge capacities;
[0034] The average value of each full discharge capacity is processed to obtain the discharge reference capacity.
[0035] In one embodiment, the display SOC calculation method further includes the steps of:
[0036] When the charging voltage of the battery system is equal to the charging cut-off voltage, confirm that the target displayed SOC is the full charge value;
[0037] When the discharge voltage of the battery system is equal to the discharge cut-off voltage, confirm that the target displayed SOC is the full discharge value.
[0038] In a second aspect, the present application provides a battery system, including a processing device and a battery pack, wherein the processing device is connected to the battery pack;
[0039] The processing device is used to execute the steps of any one of the above display SOC calculation methods.
[0040] In a third aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the above-mentioned methods for displaying SOC calculation are implemented.
[0041] One of the above technical solutions has the following advantages and beneficial effects:
[0042] In the above-mentioned display SOC calculation method, when the working state of the battery system meets the preset conditions, the reference capacity and current display SOC of the battery system are obtained; according to the preset display cycle, the capacity change value of the battery system is obtained; according to the reference capacity, the current display SOC and the capacity change value, the target display SOC of the corresponding battery system is obtained to accurately calculate the display SOC of the battery system. This application monitors the working state of the battery system, and when the working state of the battery system meets the preset conditions, the display SOC of the battery system is adjusted in time based on the reference capacity, the current display SOC and the capacity change value, thereby obtaining an accurate target display SOC, simplifying the display SOC data processing process, reducing the display SOC data processing amount, and improving the calculation accuracy of the display SOC. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] Figure 1 A schematic diagram showing an application scenario of the SOC calculation method in an embodiment of the present application;
[0044] Figure 2 A first flow chart showing a method for calculating SOC in an embodiment of the present application;
[0045] Figure 3 A second flow chart showing the SOC calculation method in an embodiment of the present application;
[0046] Figure 4 A third flow chart showing the SOC calculation method in an embodiment of the present application;
[0047] Figure 5 This is a flow chart of the charging reference capacity acquisition step in the embodiment of the present application;
[0048] Figure 6 Schematic diagram of the process of obtaining the discharge reference capacity in the embodiment of the present application;
[0049] Figure 7 Schematic diagram of the structure of the battery system in the embodiment of the present application. DETAILED DESCRIPTION
[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0052] In addition, the term "plurality" shall mean two or more.
[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0054] The display SOC calculation method provided in this application can be applied to Figure 1 In the application environment shown. Among them, the processing device may include a processor 102 and a memory 104, and the memory 104 may be used to store the baseline capacity, the current display SOC, the capacity change value and the target display SOC, etc. The processor 102 may be used to obtain the baseline capacity and the current display SOC of the battery system when the working state of the battery system meets the preset conditions; obtain the capacity change value of the battery system according to the preset display cycle; obtain the target display SOC of the corresponding battery system according to the baseline capacity, the current display SOC and the capacity change value. The processing device may also include a display 106, and the display 106 may display the baseline capacity, the current display SOC, the capacity change value and the target display SOC, etc. through a graphical interface. Exemplarily, the processing device may be a BMS (battery management system), the battery system includes a battery pack, and the processing device is connected to the battery pack.
[0055] In one embodiment, Figure 2 As shown, a method for calculating the SOC is provided, and the method is applied to Figure 1 The processor 102 in the embodiment is taken as an example to illustrate, and the following steps are included:
[0056] Step S210, when the working state of the battery system meets the preset conditions, the reference capacity and the currently displayed SOC of the battery system are obtained.
[0057] Among them, the battery system may include a battery pack, and the battery pack may be composed of a plurality of single cells, and each single cell may be connected in series and / or in parallel. The single cell may be a regular shape structure such as a square or a circle. It should be noted that the single cell may also be an irregular shape structure. The single cell may be a lithium-ion cell, for example, the single cell may be a lithium iron phosphate cell, a ternary cell or a manganese iron lithium cell. Exemplarily, the battery system can be applied to an energy storage system. For example, the energy storage system may include a plurality of battery clusters, and the battery system is composed of each battery cluster.
[0058] The working state of a battery system refers to the charging and discharging state of the battery system. For example, the working state of a battery system may include a charging state, a discharging state, a fully charged state, and a fully discharged state. It should be noted that a fully charged state refers to a charging state in which the charging voltage of the battery system reaches a preset charging cut-off voltage; a fully discharged state refers to a discharging state in which the discharge voltage of the battery system reaches a preset discharge cut-off voltage; a charging state refers to a charging state in which the charging voltage of the battery system does not reach a preset charging cut-off voltage; and a discharging state refers to a discharging state in which the discharge voltage of the battery system does not reach a preset discharge cut-off voltage.
[0059] The preset condition means that the charging voltage of the battery system does not reach the preset charging cut-off voltage or the discharging voltage does not reach the preset discharging cut-off voltage. Exemplarily, the charging cut-off voltage can be set to 3.6V, and the discharging cut-off voltage can be set to 2.8V. The reference capacity can be the capacity that the battery system can charge or discharge within the preset voltage range. For example, the reference capacity can be obtained based on the rated charging capacity or the rated discharging capacity; for another example, considering that the operating voltage of the battery system varies with the working state, that is, the chargeable or discharge capacity of the battery system changes with the working state, the reference capacity can also be determined based on the last full charge capacity or full discharge capacity to improve the accuracy of the reference capacity. The currently displayed SOC (State of Charge) refers to the current state of charge displayed by the battery system.
[0060] For example, the reference capacity and current displayed SOC of the battery system may be pre-stored in the memory. The working state of the battery system may be monitored in real time, and according to the monitoring result, when the working state of the battery system meets the preset conditions, the reference capacity and current displayed SOC of the battery system may be searched, and then the corresponding reference capacity and current displayed SOC may be obtained.
[0061] Step S220, obtaining the capacity change value of the battery system according to a preset display cycle.
[0062] The preset display period refers to the update period of the displayed SOC. For example, the preset display period can be 1 second or 5 seconds, and the displayed SOC is calculated and updated every 1 second or 5 seconds. The capacity change value of the battery system refers to the capacity change of the battery system in the corresponding preset display period. For example, if the preset display period is 5 seconds, the capacity change is the capacity change of the battery system within the corresponding 5 seconds.
[0063] Exemplarily, the capacity change value of the battery system can be calculated according to the ampere-hour integration method. According to a preset display cycle, the working current (charging current or discharging current) of the battery system is collected, and the capacity change value is obtained according to the collected working current and the preset display cycle.
[0064] Step S230, obtaining a target displayed SOC of the corresponding battery system according to the reference capacity, the current displayed SOC and the capacity change value.
[0065] The target displayed SOC refers to the displayed SOC of the battery system when it is displayed next time.
[0066] For example, a display SOC correction model can be established in advance, and the reference capacity, current display SOC and capacity change value can be input into the display SOC correction model for processing, and then the corresponding battery system target display SOC can be output, thereby improving the calculation accuracy of the display SOC.
[0067] In the above-mentioned embodiment, when the working state of the battery system meets the preset conditions, the reference capacity and the current displayed SOC of the battery system are obtained; according to the preset display cycle, the capacity change value of the battery system is obtained; according to the reference capacity, the current displayed SOC and the capacity change value, the target displayed SOC of the corresponding battery system is obtained, so as to accurately calculate the displayed SOC of the battery system. The present application monitors the working state of the battery system, and when the working state of the battery system meets the preset conditions, the displayed SOC of the battery system is adjusted in time based on the reference capacity, the current displayed SOC and the capacity change value, so as to obtain an accurate target displayed SOC, simplify the displayed SOC data processing process, reduce the data processing amount of the displayed SOC, and improve the calculation accuracy of the displayed SOC.
[0068] In one embodiment, Figure 3 As shown, a method for calculating the SOC is provided, and the method is applied to Figure 1 The processor 102 in the embodiment is taken as an example to illustrate, and the following steps are included:
[0069] Step S310, when the charging voltage of the battery system is less than the charging cut-off voltage, obtaining the charging reference capacity and the current charging display SOC of the battery system.
[0070] The charging cut-off voltage can be obtained according to the system preset. It should be noted that the charging cut-off voltage of the battery system can be determined according to the type of the battery system. For example, the charging cut-off voltage is set to 3.6V.
[0071] The charge reference capacity can be the capacity that can be charged by the battery system within the preset charging voltage range. For example, the charge reference capacity can be obtained based on the rated charge capacity; for another example, considering that the chargeable capacity of the battery system changes with the working state of the battery system, the charge reference capacity can also be determined based on the last full charge capacity to improve the accuracy of the charge reference capacity. The current charge display SOC refers to the current charge state displayed by the battery system.
[0072] For example, when the battery system is in a charging state, the charging voltage of the battery system can be monitored, and based on the monitoring results, when the charging voltage of the battery system is less than the charging cut-off voltage, the charging reference capacity and the current charging display SOC of the battery system are found, and then the corresponding charging reference capacity and the current charging display SOC are obtained.
[0073] Step S320, obtaining the capacity change value of the battery system according to a preset display cycle.
[0074] For example, according to a preset display cycle, the charging current of the battery system is collected, and the corresponding capacity change value is obtained according to the collected charging current and the preset display cycle.
[0075] Step S330, obtaining a target charging display SOC of the corresponding battery system according to the charging reference capacity, the current charging display SOC and the capacity change value.
[0076] The target charging display SOC refers to the display SOC of the battery system when the charging state is displayed next time.
[0077] For example, a charging display SOC correction model can be established in advance, and the charging reference capacity, current charging display SOC and capacity change value can be input into the charging display SOC correction model for processing, and then the corresponding battery system target charging display SOC can be output, thereby improving the calculation accuracy of the charging display SOC.
[0078] In the above-mentioned embodiment, by monitoring the working state of the battery system, when the battery system is in a charging state and the charging voltage is less than the charging cut-off voltage, the charging display SOC of the battery system is timely adjusted based on the charging reference capacity, the current charging display SOC and the capacity change value, so as to obtain an accurate target charging display SOC, so that when the battery system is charged without being emptied or fully charged, the display SOC can be adjusted in time and accurately, which simplifies the display SOC data processing process, reduces the data processing amount of the display SOC, and improves the calculation accuracy of the display SOC.
[0079] In one embodiment, Figure 4 As shown, a method for calculating the SOC is provided, and the method is applied to Figure 1 The processor 102 in the embodiment is taken as an example to illustrate, and the following steps are included:
[0080] Step S410, when the discharge voltage of the battery system is greater than the discharge cut-off voltage, obtaining the discharge reference capacity and the current discharge display SOC of the battery system.
[0081] The discharge cut-off voltage may be obtained according to a system preset. It should be noted that the discharge cut-off voltage of the battery system may be determined according to the type of the battery system. For example, the discharge cut-off voltage is set to 2.8V.
[0082] The discharge reference capacity can be the capacity that the battery system can discharge within the preset discharge voltage range. For example, the discharge reference capacity can be obtained based on the rated discharge capacity; for another example, considering that the dischargeable capacity of the battery system changes with the working state of the battery system, the discharge reference capacity can also be determined based on the last full discharge capacity to improve the accuracy of the discharge reference capacity. The current discharge display SOC refers to the discharge state of the battery system currently displayed.
[0083] For example, when the battery system is in a discharging state, the discharge voltage of the battery system can be monitored, and based on the monitoring results, when the discharge voltage of the battery system is greater than the discharge cut-off voltage, the discharge reference capacity and the current discharge display SOC of the battery system are found, and then the corresponding discharge reference capacity and the current discharge display SOC are obtained.
[0084] Step S420, obtaining the capacity change value of the battery system according to a preset display cycle.
[0085] For example, according to a preset display cycle, the discharge current of the battery system is collected, and the corresponding capacity change value is obtained according to the collected discharge current and the preset display cycle.
[0086] Step S430 , obtaining a target discharge display SOC of the corresponding battery system according to the discharge reference capacity, the current discharge display SOC and the capacity change value.
[0087] The target discharge display SOC refers to the display SOC displayed next time when the battery system is in a discharge state.
[0088] For example, a discharge display SOC correction model can be established in advance, and the discharge reference capacity, current discharge display SOC and capacity change value can be input into the discharge display SOC correction model for processing, and then the corresponding battery system target discharge display SOC can be output, thereby improving the calculation accuracy of the discharge display SOC.
[0089] In the above-mentioned embodiment, by monitoring the working state of the battery system, when the battery system is in a discharging state and the discharge voltage is greater than the discharge cut-off voltage, the discharge display SOC of the battery system is timely adjusted based on the discharge reference capacity, the current discharge display SOC and the capacity change value, so as to obtain an accurate target discharge display SOC, so that when the battery system is discharged without being emptied or fully charged, the display SOC can be adjusted in time and accurately, which simplifies the display SOC data processing process, reduces the data processing amount of the display SOC, and improves the calculation accuracy of the display SOC.
[0090] In one embodiment, the step of obtaining a target charging display SOC of a corresponding battery system according to the charging reference capacity, the current charging display SOC and the capacity change value includes:
[0091] The capacity change value is divided by the charging reference capacity to obtain a first SOC change value; the first SOC change value and the current charging display SOC are added to obtain a target charging display SOC.
[0092] The first SOC change value refers to the SOC change amount of the battery system in a corresponding preset display period when the battery system is in a charging state.
[0093] For example, assuming that the first SOC change value is ΔSOC1, the capacity change value is ΔQ, the charging reference capacity is Q1, the current charging display SOC is SOC1, and the target charging display SOC is SOC3, then ΔSOC1=ΔQ / Q1; SOC3=ΔSOC1+SOC1.
[0094] By timely adjusting the displayed SOC based on the above calculation method when the battery system is charged without being empty or fully charged, an accurate target charging displayed SOC is obtained, which simplifies the charging displayed SOC data processing process, reduces the data processing amount of the charging displayed SOC, and improves the calculation accuracy of the charging displayed SOC.
[0095] In one embodiment, the step of obtaining a target discharge display SOC of a corresponding battery system according to the discharge reference capacity, the current discharge display SOC and the capacity change value includes:
[0096] The capacity change value is divided by the discharge reference capacity to obtain a second SOC change value; the current discharge display SOC and the second SOC change value are subjected to difference processing to obtain a target discharge display SOC.
[0097] The second SOC change value refers to the SOC change amount of the battery system in a corresponding preset display period when the battery system is in a discharge state.
[0098] For example, the second SOC change value is set to ΔSOC2, the capacity change value is ΔQ, the discharge reference capacity is Q2, the current discharge display SOC is SOC2, and the target discharge display SOC is SOC4, then ΔSOC2=ΔQ / Q2; SOC4=ΔSOC2+SOC2.
[0099] By timely adjusting the displayed SOC based on the above calculation method when the battery system is discharged without being emptied or fully charged, an accurate target discharge displayed SOC is obtained, which simplifies the discharge displayed SOC data processing process, reduces the data processing amount of the discharge displayed SOC, and improves the calculation accuracy of the discharge displayed SOC.
[0100] In one embodiment, the step of obtaining the current charge display SOC of the battery system includes:
[0101] Obtain the current first remaining capacity of the battery system; divide the current first remaining capacity by the charging reference capacity to obtain the current charging display SOC.
[0102] The current first remaining capacity refers to the remaining capacity of the battery system before the current charging.
[0103] For example, the remaining capacity of the battery system can be monitored before the current charging to obtain the current first remaining capacity. The current first remaining capacity is set to Q3, the current charging display SOC is SOC1, and the charging reference capacity is Q1, then SOC1 = Q3 / Q1.
[0104] In one embodiment, the step of obtaining the current discharge display SOC of the battery system includes:
[0105] The current second remaining capacity of the battery system is obtained; the current second remaining capacity is divided by the discharge reference capacity to obtain the current discharge display SOC.
[0106] The current second remaining capacity refers to the remaining capacity of the battery system before the current discharge.
[0107] For example, the remaining capacity of the battery system can be monitored before the current discharge to obtain the current second remaining capacity. The current second remaining capacity is set to Q4, the current charging display SOC is SOC2, and the charging reference capacity is Q2, then SOC2 = Q4 / Q2.
[0108] In one embodiment, Figure 5 As shown, the steps of obtaining the charging reference capacity of the battery system include:
[0109] Step S510, obtaining the full charge capacity of at least the previous two times.
[0110] The full charge capacity refers to the charge capacity of the battery system in a fully charged state. For example, the full charge capacity of at least the last two times may be the full charge capacity of at least the most recent two times.
[0111] For example, the historical full charge capacity may be pre-stored in a memory, and the memory may be searched in chronological order of storage to obtain the most recent three full charge capacities.
[0112] Step S520, average the full charge capacities to obtain a charge reference capacity.
[0113] By performing average processing on the acquired full charge capacities, that is, taking the average value of at least the first two full charge capacities as the charge reference capacity, the accuracy of the charge reference capacity is improved, thereby improving the accuracy of the calculated and displayed SOC.
[0114] For example, for the first three full charge capacities, the system will automatically confirm whether the previous charge was a full discharge. If it is confirmed to be a full discharge, the corresponding charging capacity is included in the most recent full charge capacity; if not, the corresponding charging capacity is not included in the most recent three full charge capacities. When the battery system is operated for the first time, the most recent three full charge capacities can be set as the rated charge capacity at a preset voltage (such as 2.8V to 3.6V).
[0115] In one embodiment, Figure 6 As shown, the steps of obtaining the discharge reference capacity of the battery system include:
[0116] Step S610, obtaining at least the last two full discharge capacities.
[0117] The full discharge capacity refers to the discharge capacity of the battery system in a fully charged state. For example, the at least two previous full discharge capacities may be the at least two most recent full discharge capacities.
[0118] For example, historical full discharge capacities may be pre-stored in a memory, and the memory may be searched in chronological order of storage to obtain the most recent three full discharge capacities.
[0119] Step S620, average the full-discharge capacities to obtain a discharge reference capacity.
[0120] By performing average processing on the obtained full discharge capacities, that is, taking the average value of at least the previous two full discharge capacities as the discharge reference capacity, the accuracy of the discharge reference capacity is improved, thereby improving the accuracy of the calculated and displayed SOC.
[0121] For example, for the first three full discharge capacities, the system will automatically confirm whether the previous discharge was a full charge. If it is confirmed to be a full charge, the corresponding discharge capacity is included in the most recent full discharge capacity; if not, the corresponding discharge capacity is not included in the most recent three full discharge capacities. When the battery system is operated for the first time, the most recent three full discharge capacities can be set as the rated discharge capacity at a preset voltage (such as 2.8V to 3.6V).
[0122] In one embodiment, the display SOC calculation method further includes the step of: when the charging voltage of the battery system is equal to the charging cut-off voltage, confirming that the target display SOC is a full charge value.
[0123] For example, the full charge value can be set to 100%, and the charge cut-off voltage can be set to 3.6V. By performing voltage detection on the charging process of the battery system, when the charging voltage of the battery system reaches the charge cut-off voltage, it is determined that the battery has reached the full charge state, and then the target display SOC is confirmed to be 100%.
[0124] Exemplarily, when the battery system is finished charging, it is detected whether the charging voltage of the battery system reaches the charging cut-off voltage. If the charging voltage reaches the charging cut-off voltage, the target displayed SOC is adjusted to 100%, thereby achieving precise adjustment of the displayed SOC of the battery system in a fully charged state.
[0125] In one embodiment, the display SOC calculation method further includes the step of: when the discharge voltage of the battery system is equal to the discharge cut-off voltage, confirming that the target display SOC is a full discharge value.
[0126] For example, the full discharge value can be set to 0%, and the discharge cut-off voltage can be set to 2.8V. By performing voltage detection on the discharge process of the battery system, when the discharge voltage of the battery system reaches the discharge cut-off voltage, it is determined that the battery has reached the full discharge state, and then the target display SOC is confirmed to be 0%.
[0127] Exemplarily, when the battery system finishes discharging, it is detected whether the discharge voltage of the battery system reaches the discharge cut-off voltage. If the discharge voltage reaches the discharge cut-off voltage, the target displayed SOC is adjusted to 0%, thereby achieving precise adjustment of the displayed SOC of the battery system in a fully discharged state.
[0128] It should be understood that although Figures 2 to 6 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 2 to 6At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.
[0129] In one embodiment, a display SOC calculation device is also provided, comprising:
[0130] The condition judgment unit is used to obtain the reference capacity and currently displayed SOC of the battery system when the working state of the battery system meets the preset conditions.
[0131] The capacity change acquisition unit is used to acquire the capacity change value of the battery system according to a preset display cycle.
[0132] The display SOC calculation unit is used to obtain the target display SOC of the corresponding battery system according to the reference capacity, the current display SOC and the capacity change value.
[0133] For the specific definition of the display SOC calculation device, please refer to the definition of the display SOC calculation method above, which will not be repeated here. Each module in the above-mentioned display SOC calculation device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the battery system in hardware form, or can be stored in the memory in the battery system in software form, so that the processor can call and execute the corresponding operations of the above modules.
[0134] In one embodiment, Figure 7 As shown, a battery system is also provided, including a processing device 710 and a battery pack 720, wherein the processing device 710 is connected to the battery pack 720; the processing device 710 is used to execute the steps of any one of the above-mentioned display SOC calculation methods.
[0135] In one example, the processor is configured to perform the following steps to show the SOC calculation method:
[0136] When the working state of the battery system meets the preset conditions, the reference capacity and the current displayed SOC of the battery system are obtained; according to the preset display cycle, the capacity change value of the battery system is obtained; according to the reference capacity, the current displayed SOC and the capacity change value, the target displayed SOC of the corresponding battery system is obtained.
[0137] In the above embodiment, by monitoring the working state of the battery system, when the working state of the battery system meets the preset conditions, the displayed SOC of the battery system is timely adjusted based on the reference capacity, the current displayed SOC and the capacity change value, so as to obtain an accurate target displayed SOC, simplify the displayed SOC data processing process, reduce the data processing amount of the displayed SOC, and improve the calculation accuracy of the displayed SOC.
[0138] In one embodiment, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-mentioned methods for calculating the display SOC are implemented.
[0139] For example, a computer program, when executed by a processor, performs the following steps:
[0140] When the working state of the battery system meets the preset conditions, the reference capacity and the current displayed SOC of the battery system are obtained; according to the preset display cycle, the capacity change value of the battery system is obtained; according to the reference capacity, the current displayed SOC and the capacity change value, the target displayed SOC of the corresponding battery system is obtained to accurately calculate the displayed SOC of the battery system.
[0141] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned division operation methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.
[0142] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0143] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A method for calculating display SOC, characterized in that: The following steps are involved: When the working state of the battery system meets a preset condition, obtaining a reference capacity and a currently displayed SOC of the battery system; Acquiring a capacity change value of the battery system according to a preset display cycle; A target displayed SOC corresponding to the battery system is obtained according to the reference capacity, the current displayed SOC and the capacity change value.
2. The display SOC calculation method according to claim 1, characterized in that: When the working state of the battery system meets the preset condition, the step of obtaining the reference capacity and the currently displayed SOC of the battery system includes: When the charging voltage of the battery system is less than the charging cut-off voltage, obtaining a charging reference capacity and a current charging display SOC of the battery system; The step of obtaining a target displayed SOC corresponding to the battery system according to the reference capacity, the current displayed SOC and the capacity change value comprises: A target charging display SOC corresponding to the battery system is obtained according to the charging reference capacity, the current charging display SOC and the capacity change value.
3. The display SOC calculation method according to claim 1, characterized in that: When the working state of the battery system meets the preset condition, the step of obtaining the reference capacity and the currently displayed SOC of the battery system further comprises: When the discharge voltage of the battery system is greater than the discharge cut-off voltage, obtaining a discharge reference capacity and a current discharge display SOC of the battery system; The step of obtaining a target displayed SOC corresponding to the battery system according to the reference capacity, the current displayed SOC and the capacity change value comprises: A target discharge display SOC corresponding to the battery system is obtained according to the discharge reference capacity, the current discharge display SOC and the capacity change value.
4. The display SOC calculation method according to claim 2, characterized in that: The step of obtaining a target charging display SOC corresponding to the battery system according to the charging reference capacity, the current charging display SOC and the capacity change value comprises: Dividing the capacity change value by the charging reference capacity to obtain a first SOC change value; The first SOC change value and the current charging display SOC are added to obtain the target charging display SOC.
5. The display SOC calculation method according to claim 3, characterized in that: The step of obtaining a target discharge display SOC corresponding to the battery system according to the discharge reference capacity, the current discharge display SOC and the capacity change value comprises: Dividing the capacity change value by the discharge reference capacity to obtain a second SOC change value; The current discharge display SOC and the second SOC change value are subjected to difference processing to obtain the target discharge display SOC.
6. The display SOC calculation method according to claim 2, characterized in that: The step of obtaining the current charging display SOC of the battery system comprises: Acquire a current first remaining capacity of the battery system; The current first remaining capacity is divided by the charging reference capacity to obtain a current charging display SOC.
7. The display SOC calculation method according to claim 3, characterized in that: The step of obtaining the current discharge display SOC of the battery system comprises: Acquire a current second remaining capacity of the battery system; The current second remaining capacity is divided by the discharge reference capacity to obtain a current discharge display SOC.
8. The display SOC calculation method according to claim 2, characterized in that: The step of obtaining the charging reference capacity of the battery system comprises: Get the full charge capacity of at least the last two times; The full charge capacity is averaged to obtain the charge reference capacity.
9. The display SOC calculation method according to claim 3, characterized in that: The step of obtaining the discharge reference capacity of the battery system comprises: Get at least the last two full discharge capacities; The full discharge capacities are averaged to obtain the discharge reference capacity.
10. The display SOC calculation method according to any one of claims 1 to 9, characterized in that: Also includes the steps: When the charging voltage of the battery system is equal to the charging cut-off voltage, confirming that the target displayed SOC is a full charge value; When the discharge voltage of the battery system is equal to the discharge cut-off voltage, it is confirmed that the target displayed SOC is a full discharge value.
11. A battery system, characterized in that: comprising a processing device and a battery pack, wherein the processing device is connected to the battery pack; The processing device is used to execute the steps of the display SOC calculation method according to any one of claims 1 to 10.
12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for calculating the display SOC according to any one of claims 1 to 10 are implemented.