Battery adaptive control method, device, electronic equipment and system

Abstract

The invention discloses a battery adaptive control method and device, electronic equipment and a system, and belongs to the technical field of battery life evaluation, and the method comprises the steps: determining the real-time charging state of charge of a battery, and judging the charging interval type of the battery according to the real-time charging state of charge; determining a target charging mode based on a mapping relation between a preset interval type and a charging mode; wherein the interval type comprises an activation interval, an unsaturated linear interval, a saturated linear interval, a saturated nonlinear interval and a trickle floating charge interval; the charging modes comprise a low-current activation charging mode corresponding to an activation interval, a high-current constant-current charging mode corresponding to an unsaturated linear interval, a constant-power charging mode corresponding to a saturated linear interval, a constant-voltage charging mode corresponding to a saturated nonlinear interval and a trickle charging mode corresponding to a trickle floating charging interval. Different charging modes are adopted according to the charging interval type of the battery, and the charging efficiency, safety and stability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging and discharging control, and in particular to a battery adaptive control method, device, electronic equipment and system. Background Art

[0002] As a new energy storage technology, the charging and discharging process of all-vanadium liquid flow battery relies on complex electrochemical reactions. During the charging process, the external power supply is controlled by the battery management system (BMS) to supply power to the positive and negative electrodes of the battery respectively, causing the vanadium ions at the positive electrode to be reduced from a high valence state to a low valence state, while the vanadium ions at the negative electrode are oxidized from a low valence state to a high valence state. In this process, electrical energy is converted into chemical energy and stored in the electrolyte solution. During discharge, the vanadium ions inside the battery undergo an oxidation-reduction reaction in the electrolyte solution, releasing energy and converting it into electrical energy to supply the external load.

[0003] In the prior art, the battery's charge and discharge currents are adjusted by real-time monitoring of key parameters such as battery voltage, current, and temperature to avoid damage to the battery caused by overcharging or over-discharging. However, due to the characteristics of the all-vanadium liquid flow battery itself, when it reaches a critical state, the accumulation of chemical products will cause the battery to operate in a nonlinear region. Simply adjusting the charge and discharge currents cannot guarantee the battery's charging efficiency and the stability and safety of the battery system.

[0004] Therefore, there is an urgent need for a battery adaptive control method that can ensure the battery charging efficiency and the stability and safety of the battery system by controlling the charging and discharging working mode in multiple segments. Summary of the invention

[0005] In view of this, it is necessary to provide a battery adaptive control method, device, electronic device and system that can ensure the charging efficiency of the battery and the stability and safety of the battery system through multi-segment control of the charging and discharging working mode.

[0006] In order to solve the above technical problems, on the one hand, the present invention provides a battery adaptive control method, comprising: Determine the real-time charging state of charge of the battery, and determine the charging interval type of the battery according to the real-time charging state of charge; Based on a mapping relationship between a preset interval type and a charging mode, determining a target charging mode according to the charging interval type; Among them, the interval types include a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval.

[0007] In one possible implementation, determining the real-time charging state of a battery includes: Obtaining the measured voltage when charging a battery consisting of multiple battery stacks connected in series; Obtaining a cell reference voltage of a single battery stack; The real-time charging state of charge of the battery is calculated according to the measured voltage, the battery cell reference voltage, the preset gas constant, the Kelvin temperature and the Faraday constant.

[0008] In one possible implementation, the calculation formula for the state of charge of the all-vanadium liquid flow battery is: , in, Real-time charging status of the battery. is the measured voltage of the battery during charging, is the reference voltage of the battery cell of a single battery stack, is the Faraday constant, is the gas constant, is the temperature in Kelvin, is the number of battery stacks connected in series.

[0009] In a possible implementation, the charging interval type of the battery is determined according to the real-time charging state of charge, and the method further includes: According to the historical charging state of charge and battery charging characteristics, the battery charging process is divided into a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval according to the charging state of charge from low to high.

[0010] In one possible implementation, it also includes: Determine the real-time discharge and charge state of the battery, and judge the discharge interval type of the battery according to the real-time discharge and charge state; Based on a mapping relationship between a preset discharge interval type and a charging mode, determining a target discharge mode according to the discharge interval type; Among them, the discharge interval types include a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturated linear interval, and the discharge mode includes a large current constant current discharge mode corresponding to the discharge high state of charge interval, a constant power discharge mode corresponding to the discharge saturation linear interval and a trickle discharge mode corresponding to the discharge non-saturated linear interval.

[0011] In one possible implementation, determining the real-time discharge and charge state of the all-vanadium liquid flow battery includes: Obtain the measured discharge voltage of the battery during discharge; Based on the calculation formula of the state of charge, the real-time discharge state of charge is calculated according to the measured discharge voltage.

[0012] In a possible implementation, the discharge interval type of the battery is determined according to the real-time discharge and charge state, and the method further includes: According to the historical discharge state of charge and battery charging characteristics, the battery discharge process is divided into a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturation linear interval according to the discharge state of charge from high to low.

[0013] In a second aspect, the present invention further provides a battery adaptive control device, comprising: A charging interval type determination module, used to determine the real-time charging state of charge of the battery, and judge the charging interval type of the battery according to the real-time charging state of charge; A charging mode determination module, configured to determine a target charging mode according to a charging interval type based on a mapping relationship between a preset interval type and a charging mode; Among them, the interval types include a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval.

[0014] In a third aspect, the present invention also provides an electronic device, comprising a memory and a processor, wherein the memory is used to store programs and data; the processor is coupled to the memory, and is used to execute the program stored in the memory, to implement the battery adaptive control method as described above, and / or to implement the battery adaptive control as described above.

[0015] In a fourth aspect, the present invention further provides a battery adaptive control system, comprising the battery adaptive control device, and further comprising: a PCS bidirectional converter, a first control switch, and a DCDC conversion component; The battery adaptive control devices are connected to the battery, the first control switch and the DCDC conversion component; The first control switch connects the battery pack and the PCS bidirectional AC; The DCDC conversion component includes a second control switch, a movable DCDC converter and a third control switch connected in series; The first control switch is connected in parallel with the DCDC conversion component and then connected in series with the PCS bidirectional AC device. The PCS bidirectional AC device is externally connected to the high-voltage component via a low-voltage bus.

[0016] The beneficial effects of the present invention are: determining the real-time charging state of charge of the battery, judging the charging interval type of the battery according to the real-time charging state of charge; determining the target charging mode according to the charging interval type based on the mapping relationship between the preset interval type and the charging mode; wherein the interval type includes a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and the charging mode includes a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval. The present invention divides the charging interval into a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and first judges the charging interval type according to the real-time charging state of charge of the battery, and then adopts different charging modes corresponding to different charging interval types, which can effectively improve the efficiency of battery charging and ensure the safety and stability of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic flow chart of an embodiment of a battery adaptive control method provided by the present invention; Figure 2 For the present invention Figure 1 A schematic flow chart of an embodiment of step S101; Figure 3 A schematic diagram of a battery discharge adaptive control process provided by the present invention; Figure 4 For the present invention Figure 3 A schematic flow chart of an embodiment of step S301; Figure 5 A schematic diagram of the structure of an embodiment of a battery adaptive control device provided by the present invention; Figure 6 A schematic diagram of the structure of an embodiment of a battery adaptive control electronic device provided by the present invention; Figure 7 This is a circuit diagram of the battery adaptive control system provided by the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] In the description of the embodiments of the present invention, unless otherwise specified, "multiple" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: A exists alone, A and B exist at the same time, and B exists alone.

[0021] The descriptions of "first", "second", etc. involved in the embodiments of the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the technical features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present invention provides a battery adaptive control method, device, electronic equipment and system, which are described below respectively.

[0024] Figure 1 A schematic flow chart of an embodiment of the battery adaptive control method provided by the present invention is shown in FIG. Figure 1As shown, the battery adaptive control method includes: S101. Determine the real-time state of charge (SOC) of the battery, and judge the type of charging interval of the battery according to the real-time SOC; S102. Based on the mapping relationship between the preset interval type and the charging mode, determine the target charging mode according to the charging interval type; Among them, the interval types include a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval, and a charging trickle floating charge interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval, and a trickle charging mode corresponding to the charging trickle floating charge interval.

[0025] It should be noted that the state of charge (SOC) is the ratio of the remaining battery power to its total capacity, and is an important indicator to measure the current battery power state. During the battery charging process, the state of charge (SOC) gradually increases as the charging progresses until it reaches the full charge state.

[0026] Specifically, in this embodiment, when SOC <= 0.05 and the battery voltage is 0V, the battery is in a state after deep discharge. At this time, it is the charging activation interval. During this period, the internal chemical reaction of the battery is relatively slow, and a small current is required for activation. Since the battery voltage differs greatly from the external grid voltage, a DCDC converter needs to be connected at this time for voltage conversion and current control, so that the charging current uses the trickle mode for charging, gradually increasing from a small current to avoid excessive impact on the battery; When 0.05 < SOC < 0.2, the battery voltage working range is 500V to 580V at this time, which is the charging non-saturated linear interval. During this period, the charging efficiency of the battery is high, and there is a stable linear relationship between the charging voltage and the charging current. The large current constant current charging mode is used to charge the battery quickly and efficiently, so that the battery power rises rapidly; When 0.2 <= SOC <= 0.8, the battery voltage working range is 580V to 650V at this time, which is the charging saturated linear interval. In this interval, the internal chemical reaction of the battery gradually tends to be balanced. Excessive current may cause phenomena such as overheating and gas evolution that are not conducive to the battery performance. At the same time, as the current power increases, its ability to accept the charging current will also decrease. At this time, the constant power charging mode is adopted, which indirectly limits the magnitude of the charging current, and at the same time can charge the battery quickly, thereby protecting the safety of the battery performance and improving the charging efficiency; When 0.8 < SOC < 0.9, the operating range of the battery voltage is 650V - 685V, which is the charging saturation non-linear range. In this range, the battery charge is close to saturation, and the charging characteristic of the battery becomes highly non-linear. The battery voltage rises rapidly, while the battery current hardly increases or may show a downward trend. At this time, the constant voltage charging mode is adopted to limit the excessive increase of the battery voltage, avoiding damage to the battery, and at the same time, it can also use electric energy more efficiently and reduce energy loss; When SOC >= 0.9, the operating range of the battery voltage is 685V - 700V, which is the charging trickle floating charge range. At this time, the battery charge is already completely close to the full charge state, but a very small current (trickle) still needs to be maintained to continue charging until the full charge state. This current is mainly used to compensate for the charge loss caused by battery self-discharge until the state of charge (SOC) reaches the preset charging limit threshold, and then the charging ends. In this embodiment, the preset charging limit threshold is SOC = 0.95.

[0027] In this embodiment, by determining the real-time charging state of charge of the battery and judging the type of the charging range according to the real-time charging state of charge; when the charging range type is the charging activation range, the charging mode is set to the small current activation charging mode; when the charging range type is the charging non-saturated linear range, the charging mode is set to the large current constant current charging mode; when the charging range type is the charging saturated linear range, the charging mode is set to the constant power charging mode; when the charging range type is the charging saturated non-linear range, the charging mode is set to the constant voltage charging mode; when the charging range type is the charging trickle floating charge range, the charging mode is set to the trickle charging mode. By dividing the charging range into the charging activation range, the charging non-saturated linear range, the charging saturated linear range, the charging saturated non-linear range, and the charging trickle floating charge range, judging the charging range according to the real-time charging state of charge of the battery, and adopting different charging modes corresponding to different charging range types, the charging efficiency of the battery can be improved, and the safety and stability of the battery system can be ensured.

[0028] In this embodiment, by dividing the charging range into multiple ranges, judging the charging range according to the real-time charging state of charge of the battery, and adopting different charging modes for different charging ranges, the charging efficiency of the battery can be effectively improved, and the safety and stability of the battery can be ensured.

[0029] In some embodiments of the present invention, as Figure 2 shown, Figure 2 is a schematic flow chart of an embodiment of step S101 provided by the present invention, which determines the total capacity of the proportional valve opening execution and the total gap of the opening target, including: Figure 1 S201. Obtain the measured voltage when the battery is charged with multiple fuel cells connected in series; S201, obtain the measured voltage during battery charging with multiple fuel cells connected in series; S202, obtaining a cell reference voltage of a single battery stack; S203, calculating the real-time charging state of charge according to the measured voltage, the reference voltage of the battery cells of a single battery stack, the preset gas constant, the Kelvin temperature and the Faraday constant.

[0030] It should be noted that the all-vanadium liquid flow battery includes multiple battery stacks connected in series. An external voltage measuring instrument monitors the battery voltage in real time and obtains the battery cell reference voltage of a single battery stack based on the battery cell type, material and design factors of the battery stack.

[0031] This embodiment calculates the state of charge of the battery according to the measured voltage of the battery, providing a data basis for determining the charging state of the battery.

[0032] In some embodiments of the present invention, the calculation formula of the real-time charging state of charge of the battery is: , in, Real-time charging status of the battery. is the measured voltage during charging, is the reference voltage of the battery cell of a single battery stack, is the Faraday constant, is the gas constant, is the temperature in Kelvin, is the number of battery stacks connected in series.

[0033] In some embodiments of the present invention, before determining the interval type of the charging interval of the battery according to the real-time charging state of charge, the method further includes: According to the historical charging state of charge and battery charging characteristics, the battery charging process is divided into a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval according to the charging state of charge from low to high.

[0034] It should be noted that the charging process is divided into five main intervals according to the charge state and battery charging characteristics. These intervals reflect the different stages of the battery from low to fully charged, including the charging activation interval, the battery is in a state of deep discharge, and the internal chemical reaction is slow. The purpose of this stage is to gradually restore the battery to a state where it can accept normal charging; the charging non-saturated linear interval, the battery charging efficiency is high, and the charging voltage and current are in a stable linear relationship, the charging speed is relatively fast, the internal chemical reaction of the battery is active, and it can effectively convert electrical energy into chemical energy; the charging saturated linear interval, the charging efficiency begins to gradually decrease. Although the relationship between voltage and current still maintains a certain degree of linearity, the charging speed begins to slow down; in the charging saturation nonlinear interval, the battery's charging characteristics become highly nonlinear, the battery voltage rises rapidly, the current hardly increases, and may even show a downward trend. At this time, the battery is already close to its maximum storage capacity. Further overcharging will cause the battery to overcharge, damage the battery and cause safety problems. Therefore, the charging voltage and current must be strictly controlled to ensure the safety of the battery; in the trickle floating charge interval, the battery is close to being fully charged, but it is still necessary to maintain a very small current (trickle current) to maintain the battery in a fully charged state. This current is mainly used to compensate for the power loss caused by battery self-discharge to maintain the battery's performance and life.

[0035] This embodiment can refine the battery charging process by reasonably dividing the battery charging process into five different intervals, facilitate accurate control of the battery charging mode, and ensure the efficiency, safety and stability of the battery charging process.

[0036] In some embodiments of the present invention, Figure 3 As shown, Figure 3 The schematic diagram of the battery discharge adaptive control process provided by the present invention includes: S301, determining the real-time discharge and charge state of the battery, and judging the discharge interval type of the battery according to the real-time discharge and charge state; S302, based on a preset mapping relationship between the discharge interval type and the discharge mode, determining a target discharge mode according to the discharge interval type; Among them, the discharge interval types include a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturated linear interval, and the discharge mode includes a large current constant current discharge mode corresponding to the discharge high state of charge interval, a constant power discharge mode corresponding to the discharge saturation linear interval and a trickle discharge mode corresponding to the discharge non-saturated linear interval.

[0037] Specifically, in this embodiment, the real-time state of charge (SOC) of the battery is judged. When 0.8 < SOC < 0.95 and the battery voltage operating range is 650V - 685V at this time, it is the high state of charge discharge range. During this period, the battery has a relatively high energy reserve, can support a relatively large discharge current, the battery voltage is relatively stable, and the discharge efficiency is relatively high. Therefore, this range is suitable for discharging operations with high current requirements, and a relatively high constant current value is set to ensure that the battery can release energy at a relatively fast speed; When 0.2 <= SOC <= 0.8, the battery voltage operating range is 580V - 650V at this time, which is the non-saturated linear charging range. During this period, the discharge characteristics of the battery are still relatively linear, but the discharge speed begins to gradually slow down. The battery voltage will gradually decrease as the battery power decreases, but the decreasing speed is relatively uniform. At this time, the constant power mode is used for discharging, which can discharge with relatively high efficiency, reduce energy loss, and ensure a stable discharging process; When 0.05 < SOC < 0.2, the battery voltage operating range is 500V - 580V at this time, which is the non-saturated linear discharge range. In this range, the battery power is already relatively low, the discharge characteristics of the battery become non-linear, the voltage drop speed accelerates, and at the same time, the discharge capacity of the battery also decreases significantly and cannot support the discharge requirements of large current or high power. In order to protect the battery from damage caused by over-discharge, the trickle mode is used for discharging. At the same time, in order to protect the battery from damage caused by over-discharge, when setting the discharge limit threshold, when the state of charge (SOC) reaches the discharge limit threshold, the discharge ends. In this embodiment, the preset discharge limit threshold is SOC = 0.05.

[0038] In this embodiment, by dividing the discharge range into multiple ranges, judging the type of discharge range according to the real-time state of charge and discharge of the battery, and adopting different discharge modes corresponding to different discharge range types, the discharge efficiency of the battery can be effectively improved, and the safety and stability of the battery system can be ensured.

[0039] In some embodiments of the present invention, as Figure 4 shown, Figure 4 is a schematic flowchart of an embodiment of step S301 provided by the present invention. Determining the real-time state of charge and discharge of the all-vanadium redox flow battery includes: Figure 3 S401. Obtain the measured discharge voltage when the battery discharges; S402. Based on the calculation formula of the state of charge, calculate the real-time state of charge and discharge according to the measured discharge voltage.

[0040] In this embodiment, the state of charge of the battery is calculated according to the measured voltage of the battery, providing a data basis for judging the battery discharge state.

[0041] In some embodiments of the present invention, before determining the discharge interval type of the battery according to the real-time discharge and charge state, the method further includes: According to the historical discharge state of charge and battery charging characteristics, the battery discharge process is divided into a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturation linear interval according to the discharge state of charge from high to low.

[0042] In order to better implement the battery adaptive control method in the embodiment of the present invention, based on the battery adaptive control method, correspondingly, Figure 5 As shown, the embodiment of the present invention further provides a battery adaptive control device 500 including: A charging interval type determination module 501 is used to determine the real-time charging state of charge of the battery, and judge the charging interval type of the battery according to the real-time charging state of charge; A charging mode determination module 502, configured to determine a target charging mode according to a charging interval type based on a mapping relationship between a preset interval type and a charging mode; Among them, the interval types include charging activation interval, charging non-saturated linear interval, charging saturated linear interval, charging saturated non-linear interval and charging trickle floating interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval.

[0043] The battery adaptive control device 500 provided in the above embodiment can implement the technical solution described in the above battery adaptive control method embodiment. The specific implementation principles of the above modules or units can refer to the corresponding contents in the above battery adaptive control method embodiment, which will not be repeated here.

[0044] In the embodiment of the present invention, the battery adaptive control device may be an independent server, or a server network or server cluster composed of servers. For example, the battery adaptive control device described in the embodiment of the present invention includes but is not limited to a computer, a network host, a single network server, a plurality of network server sets or a cloud server composed of a plurality of servers. The cloud server is composed of a large number of computers or network servers based on cloud computing.

[0045] The present invention also provides a battery adaptive control electronic device, such as Figure 6 As shown, Figure 6This is a structural block diagram of an embodiment of a battery adaptive control electronic device provided by the present invention. The battery adaptive control electronic device 600 can be a computing electronic device such as a mobile terminal, a desktop computer, a notebook, a PDA, and a server. The battery adaptive control electronic device 600 includes a processor 601 and a memory 602, wherein the memory 602 stores a battery adaptive control program 603.

[0046] In some embodiments, the memory 602 may be an internal storage unit of a computer electronic device, such as a hard disk or memory of a computer electronic device. In other embodiments, the memory 602 may also be an external storage electronic device of a computer electronic device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the computer electronic device. Further, the memory 602 may also include both an internal storage unit of a computer electronic device and an external storage electronic device. The memory 602 is used to store application software and various types of data installed in the computer electronic device, such as program codes installed in the computer electronic device. The memory 602 may also be used to temporarily store data that has been output or is to be output. In one embodiment, the battery adaptive control program 603 may be executed by the processor 601, thereby realizing the battery adaptive control method, device, electronic device and storage electronic device of each embodiment of the present invention.

[0047] In some embodiments, the processor 601 may be a central processing unit (CPU), a microprocessor or other data processing chip, and is used to run program codes or process data stored in the memory 602, such as executing a battery adaptive control program.

[0048] The present invention also provides a battery adaptive control system. Figure 7 As shown, Figure 7 A schematic diagram of a battery adaptive control system provided by the present invention, including the above-mentioned battery adaptive control, and also including a PCS bidirectional converter, a first control switch K1 and a DCDC conversion component; The battery adaptive control devices are connected to the battery, the first control switch K1 and the DCDC conversion component; The first control switch K1 connects the battery pack and the PCS bidirectional AC; The DCDC conversion component includes a second control switch K2, a movable DCDC converter and a third control switch K3 connected in series; The first control switch K1 is connected in parallel with the DCDC conversion component and then connected in series with the PCS bidirectional AC. The PCS bidirectional AC is externally connected to the high-voltage component through the low-voltage bus.

[0049] Specifically, when the battery starts to charge, the battery adaptive control device monitors the battery voltage and calculates the battery state of charge. When the state of charge is in the charging activation interval, the battery adaptive control device controls the first control switch K1 to be disconnected, the second control switch K2 and the third control switch K3 to be closed, and the portable DCDC converter 5 converts the constant voltage output by the PCS bidirectional AC device to a trickle output, and uses the trickle mode to activate the battery; when the state of charge is in the charging non-saturated linear interval, the battery adaptive control device controls the first control switch K1 to be closed, the second control switch K2 and the third control switch K3 to be disconnected, the portable DCDC converter stops working, and at the same time controls the PCS bidirectional AC device to output a large current constant current, and uses the large current constant current mode to charge the battery; when the state of charge is in the charging ... closed, the portable DCDC converter stops working, and at the same time controls the PCS bidirectional AC device to output a large current constant current, and uses the large current constant current mode to charge the battery. The switch K2 and the third control switch are disconnected, the portable DCDC converter stops working, and at the same time controls the PCS bidirectional AC to output constant power, and uses the constant power mode to charge the battery; when the state of charge is in the charging saturation nonlinear interval, the battery adaptive control device controls the first control switch K1 to close, the second control switch K2 and the third control switch K3 to disconnect, the portable DCDC converter stops working, and at the same time controls the PCS bidirectional AC to output constant voltage, and uses the constant voltage mode to charge the battery; when the state of charge is in the charging trickle floating charge interval, the battery adaptive control device controls the first control switch K1 to disconnect, the second control switch K2 and the third control switch K3 to close, the portable DCDC converter converts the constant voltage output by the PCS bidirectional AC, controls it to trickle output, and uses the trickle mode to charge the battery until the battery state of charge reaches the preset charging limit threshold, and the charging is terminated.

[0050] When the battery starts to discharge, the battery adaptive control device monitors the battery voltage and calculates the battery state of charge. When the state of charge is in the high state of charge interval of discharge, the battery adaptive control device controls the first control switch K1 to close, the second control switch K2 and the third control switch K3 to open, the portable DCDC converter to stop working, and the battery is controlled to output a large current constant current, and the large current constant current mode is used for discharge; when the state of charge is in the discharge saturation linear interval, the battery adaptive control device controls the first control switch K1 to close, the second control switch K2 and the third control switch K3 to open, the portable DCDC converter to stop working, and the battery is controlled to output a constant power, and the constant power mode is used for discharge; when the state of charge is in the discharge non-saturation linear interval, the battery adaptive control device controls the first control switch K1 to open, the second control switch K2 and the third control switch K3 to close, the portable DCDC converter controls the battery to output a trickle current, and the battery is charged using the trickle current mode until the battery state of charge reaches the preset discharge limit threshold, and the discharge ends.

[0051] The battery adaptive control method, device, electronic device and system provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery adaptive control method, characterized in that: include: Determine the real-time charging state of charge of the battery, and determine the charging interval type of the battery according to the real-time charging state of charge; Based on a mapping relationship between a preset interval type and a charging mode, determining a target charging mode according to the charging interval type; Among them, the interval types include a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval.

2. The battery adaptive control method according to claim 1, characterized in that: Determine the battery's real-time charging state of charge, including: Obtaining the measured voltage when charging a battery consisting of multiple battery stacks connected in series; Obtaining a cell reference voltage of a single battery stack; The real-time charging state of charge of the battery is calculated according to the measured voltage, the battery cell reference voltage, the preset gas constant, the Kelvin temperature and the Faraday constant.

3. The battery adaptive control method according to claim 2, characterized in that: The calculation formula of the real-time charging state of charge of the battery is: ， in, Real-time charging status of the battery. is the measured voltage during charging, is the reference voltage of the battery cell of a single battery stack, is the Faraday constant, is the gas constant, is the temperature in Kelvin, is the number of battery stacks connected in series.

4. The battery adaptive control method according to claim 1, characterized in that: Determining the charging interval type of the battery according to the real-time charging state of charge, the method also includes: According to the historical charging state of charge and battery charging characteristics, the battery charging process is divided into a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval according to the charging state of charge from low to high.

5. The battery adaptive control method according to claim 1, characterized in that: Also includes: Determine the real-time discharge and charge state of the battery, and judge the discharge interval type of the battery according to the real-time discharge and charge state; Based on a mapping relationship between a preset discharge interval type and a charging mode, determining a target discharge mode according to the discharge interval type; Among them, the discharge interval types include a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturated linear interval, and the discharge mode includes a large current constant current discharge mode corresponding to the discharge high state of charge interval, a constant power discharge mode corresponding to the discharge saturation linear interval and a trickle discharge mode corresponding to the discharge non-saturated linear interval.

6. The battery adaptive control method according to claim 5, characterized in that: Determine the real-time discharge and charge state of a vanadium flow battery, including: Obtain the measured discharge voltage of the battery during discharge; Based on the calculation formula of the state of charge, the real-time discharge state of charge is calculated according to the measured discharge voltage.

7. The battery adaptive control method according to claim 6, characterized in that: The method further comprises: determining the discharge interval type of the battery according to the real-time discharge and charge state; According to the historical discharge state of charge and battery charging characteristics, the battery discharge process is divided into a discharge high state of charge interval, a discharge saturation linear interval and a discharge non-saturation linear interval according to the discharge state of charge from high to low.

8. A battery adaptive control device, characterized in that: include: A charging interval type determination module, used to determine the real-time charging state of charge of the battery, and judge the charging interval type of the battery according to the real-time charging state of charge; A charging mode determination module, configured to determine a target charging mode according to a charging interval type based on a mapping relationship between a preset interval type and a charging mode; Among them, the interval types include a charging activation interval, a charging non-saturated linear interval, a charging saturated linear interval, a charging saturated non-linear interval and a charging trickle floating interval, and the charging modes include a small current activation charging mode corresponding to the charging activation interval, a large current constant current charging mode corresponding to the charging non-saturated linear interval, a constant power charging mode corresponding to the charging saturated linear interval, a constant voltage charging mode corresponding to the charging saturated non-linear interval and a trickle charging mode corresponding to the charging trickle floating interval.

9. A battery adaptive control device, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the battery adaptive control method according to any one of claims 1 to 7 are implemented.

10. A battery adaptive control system, characterized in that: The battery adaptive control device according to claim 9 further comprises: a PCS bidirectional converter, a first control switch and a DCDC conversion component; The battery adaptive control devices are connected to the battery, the first control switch and the DCDC conversion component; The first control switch connects the battery pack and the PCS bidirectional AC; The DCDC conversion component includes a second control switch, a movable DCDC converter and a third control switch connected in series; The first control switch is connected in parallel with the DCDC conversion component and then connected in series with the PCS bidirectional AC device. The PCS bidirectional AC device is externally connected to the high-voltage component via a low-voltage bus.

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