Supercapacitor and battery hybrid energy storage system and method

Abstract

The present invention discloses a supercapacitor and battery hybrid energy storage system and method, which relates to the field of battery energy storage and includes an energy storage center. The energy storage center is communicatively connected to a data acquisition module, a data analysis module, and a charge and discharge module. The data acquisition module collects the state data of the supercapacitor and the battery. The state data of the supercapacitor and the battery includes the discharge voltage, discharge current, and remaining power of the supercapacitor and the battery. The data analysis module analyzes the collected state data of the supercapacitor and the battery to obtain the hybrid power state of the supercapacitor and the battery. The charge and discharge module charges and discharges the supercapacitor and the battery according to the obtained hybrid power state of the supercapacitor and the battery, further improving the performance of the supercapacitor and the battery and extending the service life of the supercapacitor and the battery.

Description

Technical Field

[0001] The present invention relates to the field of battery energy storage, and specifically to a hybrid energy storage system and method of supercapacitors and storage batteries. Background Art

[0002] Storage batteries usually have a relatively high energy density and can store a large amount of energy, but their power density is relatively low and they cannot be charged and discharged quickly. Storage batteries can store energy for a long time and provide a stable power output when needed; supercapacitors have a relatively high power density and can be charged and discharged quickly, but their energy density is relatively low. Supercapacitors have an extremely low internal resistance and fast charge and discharge characteristics, and can absorb or release a large amount of energy instantly, and are used in scenarios such as handling transient loads or recovering braking energy. Combining the two can improve the efficiency of the energy storage system and extend the cycle life.

[0003] How to analyze the state data of supercapacitors and storage batteries, obtain the hybrid state of charge of supercapacitors and storage batteries, and charge and discharge supercapacitors and storage batteries according to the obtained hybrid state of charge of supercapacitors and storage batteries, so as to improve the performance of supercapacitors and storage batteries and extend the life of supercapacitors and storage batteries is a problem that needs to be solved by us. For this reason, a hybrid energy storage system and method of supercapacitors and storage batteries are provided herein. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a hybrid energy storage system and method of supercapacitors and storage batteries.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A hybrid energy storage system of supercapacitors and storage batteries, including an energy storage center, and the energy storage center is communicatively connected with a data acquisition module, a data analysis module, and a charge and discharge module;

[0006] The data acquisition module is used to acquire the state data of supercapacitors and storage batteries;

[0007] The data analysis module is used to analyze the acquired state data of supercapacitors and storage batteries to obtain the hybrid state of charge of supercapacitors and storage batteries;

[0008] The charge and discharge module is used to charge and discharge supercapacitors and storage batteries according to the obtained hybrid state of charge of supercapacitors and storage batteries.

[0009] Further, the process of the data acquisition module acquiring the state data of supercapacitors and storage batteries includes:

[0010] The state data of supercapacitors and storage batteries includes the discharge voltage, discharge current, and remaining charge of supercapacitors and storage batteries;

[0011] The data acquisition module is composed of a voltage acquisition terminal, a current acquisition terminal, and a remaining power acquisition terminal;

[0012] Install the voltage acquisition terminal, the current acquisition terminal, and the remaining power acquisition terminal at the corresponding positions in the new energy vehicle, and respectively obtain the discharge voltage, discharge current, and remaining power of the supercapacitor and the battery in the new energy vehicle through the installed voltage acquisition terminal, current acquisition terminal, and remaining power acquisition terminal.

[0013] Furthermore, the process of the data analysis module analyzing the collected state data of the supercapacitor and the battery includes:

[0014] Add the discharge current of the supercapacitor and the discharge current of the battery to obtain the mixed discharge current of the supercapacitor and the battery, add the discharge voltage of the supercapacitor and the discharge voltage of the battery to obtain the mixed discharge voltage of the supercapacitor and the battery, and add the remaining power of the supercapacitor and the remaining power of the battery to obtain the mixed remaining power of the supercapacitor and the battery;

[0015] Obtain the mixed state-of-charge coefficient of the supercapacitor and the battery based on the obtained mixed discharge current, mixed discharge voltage, and mixed remaining power of the supercapacitor and the battery, denote the obtained mixed state-of-charge coefficient of the supercapacitor and the battery as IC, set the threshold range of the mixed state-of-charge coefficient of the supercapacitor and the battery, and denote the set threshold range of the mixed state-of-charge coefficient of the supercapacitor and the battery as (IC0, IC1);

[0016] Obtain the mixed state-of-charge of the supercapacitor and the battery based on the comparison result between the obtained mixed state-of-charge coefficient of the supercapacitor and the battery and the set threshold range of the mixed state-of-charge coefficient of the supercapacitor and the battery.

[0017] Furthermore, the process of obtaining the mixed state-of-charge of the supercapacitor and the battery includes:

[0018] When IC ≤ IC0, the mixed state-of-charge of the supercapacitor and the battery is in a low state-of-charge;

[0019] When IC0 < IC < IC1, the mixed state-of-charge of the supercapacitor and the battery is in a normal state-of-charge;

[0020] When IC ≥ IC1, the mixed state-of-charge of the supercapacitor and the battery is in a high state-of-charge.

[0021] Furthermore, the process of the charge and discharge module charging and discharging the supercapacitor and the battery according to the obtained mixed state-of-charge of the supercapacitor and the battery includes:

[0022] The charging and discharging module is provided with a voltage and current distribution unit;

[0023] When the combined power state of the supercapacitor and the battery is in a low power state, charge the supercapacitor and the battery;

[0024] The new energy vehicle owner selects the corresponding charging mode according to the actual situation, and the charging mode includes a fast charging mode and a normal charging mode;

[0025] Obtain the supply current and supply voltage of the power supply. The voltage and current distribution unit sets the distribution ratio of the supercapacitor and the battery according to the charging mode, obtains the supply current and supply voltage of the supercapacitor and the battery, and charges the supercapacitor according to the obtained supply current and supply voltage of the supercapacitor, and charges the battery according to the obtained supply current and supply voltage of the battery;

[0026] When the combined power state of the supercapacitor and the battery is not in a low power state, the supercapacitor and the battery discharge;

[0027] Obtain the current consumption of the electrical equipment in the new energy vehicle, set the current consumption threshold of the electrical equipment according to the actual situation. When the current consumption of the electrical equipment in the new energy vehicle is less than or equal to the current consumption threshold, the battery discharges to provide the current consumption of the electrical equipment;

[0028] When the current consumption of the electrical equipment in the new energy vehicle is greater than the current consumption threshold, the supercapacitor and the battery perform hybrid discharge to provide the current consumption of the electrical equipment.

[0029] Further, the process of obtaining the supply current and supply voltage of the supercapacitor and the battery includes:

[0030] Obtain the supply current and supply voltage of the supercapacitor according to the supply current, supply voltage of the power supply and the distribution ratio of the supercapacitor, and obtain the supply current and supply voltage of the battery according to the supply current, supply voltage of the power supply and the distribution ratio of the battery.

[0031] Further, the process of hybrid discharge by the supercapacitor and the battery includes:

[0032] Obtain the initial discharge current of the supercapacitor and the battery. The discharge current of the supercapacitor and the battery changes with time, and obtain the changing discharge current of the supercapacitor and the battery according to the obtained initial discharge current of the supercapacitor and the battery;

[0033] The variable discharge currents of a supercapacitor and a storage battery are used to supply power to the electrical equipment in a new energy vehicle until the variable discharge current of the storage battery is the same as the power consumption current of the electrical equipment. At this point, the variable discharge currents of the supercapacitor and the storage battery stop changing. The variable discharge current of the storage battery after stopping the change is denoted as the stopped variable discharge current. The electrical equipment in the new energy vehicle is powered by the stopped variable discharge current of the storage battery. When the power consumption current of the electrical equipment in the new energy vehicle changes, the variable discharge currents of the supercapacitor and the storage battery change accordingly. The variable discharge currents of the changed supercapacitor and the storage battery are used to supply power to the electrical equipment in the new energy vehicle.

[0034] The present invention also discloses a hybrid energy storage method for a hybrid energy storage system of a supercapacitor and a storage battery, including the following steps:

[0035] Step 1: Obtain the state data of the supercapacitor and the storage battery;

[0036] Step 2: Analyze the obtained state data of the supercapacitor and the storage battery to obtain the hybrid state of charge of the supercapacitor and the storage battery;

[0037] Step 3: Charge and discharge the supercapacitor and the storage battery according to the obtained hybrid state of charge of the supercapacitor and the storage battery.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows: The state data of the supercapacitor and the storage battery are collected, and the state data of the supercapacitor and the storage battery include the discharge voltage, discharge current, and remaining charge of the supercapacitor and the storage battery. The collected state data of the supercapacitor and the storage battery are analyzed to obtain the hybrid state of charge of the supercapacitor and the storage battery. The supercapacitor and the storage battery are charged and discharged according to the obtained hybrid state of charge of the supercapacitor and the storage battery, further improving the performance of the supercapacitor and the storage battery and extending the service life of the supercapacitor and the storage battery. Description of the Drawings

[0039] Figure 1 is the schematic diagram of the present invention. Detailed Embodiments

[0040] As Figure 1 shown, a hybrid energy storage system of a supercapacitor and a storage battery includes an energy storage center, and the energy storage center is communicatively connected to a data acquisition module, a data analysis module, and a charge and discharge module;

[0041] The data acquisition module is used to collect the state data of the supercapacitor and the storage battery;

[0042] It should be further noted that, in the specific implementation process, the process of the data acquisition module collecting the state data of the supercapacitor and the storage battery includes:

[0043] The state data of the super capacitor and the battery include the discharge voltage, discharge current, and remaining power of the super capacitor and the battery;

[0044] The data acquisition module consists of a voltage acquisition terminal, a current acquisition terminal, and a remaining power acquisition terminal;

[0045] The voltage acquisition terminal is used to acquire the discharge voltage of the super capacitor and the battery, the current acquisition terminal is used to acquire the discharge current of the super capacitor and the battery, and the remaining power acquisition terminal is used to acquire the remaining power of the super capacitor and the battery;

[0046] Install the voltage acquisition terminal, current acquisition terminal, and remaining power acquisition terminal at the corresponding positions in the new energy vehicle. Obtain the discharge voltage of the super capacitor and the battery in the new energy vehicle through the installed voltage acquisition terminal, obtain the discharge current of the super capacitor and the battery in the new energy vehicle through the installed current acquisition terminal, and obtain the remaining power of the super capacitor and the battery in the new energy vehicle through the installed remaining power acquisition terminal.

[0047] The data analysis module is used to analyze the state data of the super capacitor and the battery collected, and obtain the hybrid power state of the super capacitor and the battery;

[0048] It should be further noted that in the specific implementation process, the process of the data analysis module analyzing the state data of the super capacitor and the battery collected includes:

[0049] Denote the discharge current of the super capacitor as I cf , denote the discharge current of the battery as I xf , add the discharge current of the super capacitor and the discharge current of the battery to obtain the hybrid discharge current of the super capacitor and the battery, and denote the obtained hybrid discharge current of the super capacitor and the battery as I hf ;

[0050] Among them, ;

[0051] Denote the discharge voltage of the super capacitor as U cf , denote the discharge voltage of the battery as U xf , add the discharge voltage of the super capacitor and the discharge voltage of the battery to obtain the hybrid discharge voltage of the super capacitor and the battery, and denote the obtained hybrid discharge voltage of the super capacitor and the battery as U hf ;

[0052] Among them, ;

[0053] Record the remaining power of the supercapacitor as C cs Record the remaining power of the battery as C xs Add the remaining power of the supercapacitor and the remaining power of the battery to obtain the combined remaining power of the supercapacitor and the battery, and record the obtained combined remaining power of the supercapacitor and the battery as C hs ;

[0054] Among them, ;

[0055] Obtain the combined state-of-charge coefficient of the supercapacitor and the battery based on the obtained combined discharge current, combined discharge voltage, and combined remaining power of the supercapacitor and the battery, and record the obtained combined state-of-charge coefficient of the supercapacitor and the battery as IC;

[0056] Among them, ; is the weight coefficient of the combined discharge current of the supercapacitor and the battery, is the weight coefficient of the combined discharge voltage of the supercapacitor and the battery, is the weight coefficient of the combined remaining power of the supercapacitor and the battery;

[0057] Set the threshold range of the combined state-of-charge coefficient of the supercapacitor and the battery, and record the set threshold range of the combined state-of-charge coefficient of the supercapacitor and the battery as (IC0, IC1);

[0058] Obtain the combined state-of-charge of the supercapacitor and the battery based on the comparison result between the obtained combined state-of-charge coefficient of the supercapacitor and the battery and the set threshold range of the combined state-of-charge coefficient of the supercapacitor and the battery;

[0059] When IC ≤ IC0, the combined state-of-charge of the supercapacitor and the battery is in a low state-of-charge;

[0060] When IC0 < IC < IC1, the combined state-of-charge of the supercapacitor and the battery is in a normal state-of-charge;

[0061] When IC ≥ IC1, the combined state-of-charge of the supercapacitor and the battery is in a high state-of-charge.

[0062] The charge and discharge module is used to charge and discharge the supercapacitor and the battery according to the obtained combined state-of-charge of the supercapacitor and the battery;

[0063] It should be further noted that in the specific implementation process, the process of the charge and discharge module charging and discharging the supercapacitor and the battery according to the obtained combined state-of-charge of the supercapacitor and the battery includes:

[0064] The charging and discharging module is provided with a voltage and current distribution unit;

[0065] The voltage and current distribution unit is used to distribute the supply voltage and supply current;

[0066] When the hybrid power state of the super capacitor and the battery is in a low power state, charge the super capacitor and the battery;

[0067] The new energy vehicle owner selects the corresponding charging mode according to the actual situation, and the charging mode includes a fast charging mode and a normal charging mode;

[0068] Obtain the supply current and supply voltage of the power supply, and denote the obtained supply current of the power supply as I g and denote the obtained supply voltage of the power supply as U g ;

[0069] When charging the super capacitor and the battery in the normal charging mode, the supply voltage and supply current reach the voltage and current distribution unit, set the distribution ratio of the super capacitor and the battery according to the charging mode, and set the distribution ratio of the super capacitor in the normal charging mode as a zcf and denote the distribution ratio of the battery in the normal charging mode as a zxf ;

[0070] where a zcf +a zxf =1, 0 < a zcf < 1, 0 < a zxf < 1, a zcf < a zxf ;

[0071] Obtain the supply current and supply voltage of the super capacitor and the battery in the normal charging mode according to the set distribution ratio, denote the supply current of the super capacitor in the normal charging mode as the normal capacitor supply current, and denote the normal capacitor supply current as I zcg denote the supply voltage of the super capacitor in the normal charging mode as the normal capacitor supply voltage, and denote the normal capacitor supply voltage as U zcg denote the supply current of the battery in the normal mode as the normal battery supply current, and denote the normal battery supply current as I zxg denote the supply voltage of the battery in the normal mode as the normal battery supply voltage, and denote the normal battery supply voltage as U zxg ;

[0072] where ; ; ; ;

[0073] The supercapacitor is charged with the normal capacitor supply current and normal capacitor supply voltage, and the battery is charged with the normal battery supply current and normal battery supply voltage;

[0074] When the supercapacitor and the battery are charged in the fast charging mode, the supply voltage and supply current reach the voltage and current distribution unit. According to the charging mode, the distribution ratio of the supercapacitor and the battery is set, and the distribution ratio of the supercapacitor in the fast charging mode is set to a kcf The distribution ratio of the battery in the fast charging mode is denoted as a kxf ;

[0075] Where a kcf +a kxf = 1, 0 < a kcf <1, 0 < a kxf <1, a kxf <a kcf ;

[0076] According to the set distribution ratio, the supply current and supply voltage of the supercapacitor and the battery in the fast charging mode are obtained. The supply current of the supercapacitor in the fast charging mode is denoted as the fast capacitor supply current, and the fast capacitor supply current is denoted as I kcg The supply voltage of the supercapacitor in the fast charging mode is denoted as the fast capacitor supply voltage, and the fast capacitor supply voltage is denoted as U kcg The supply current of the battery in the fast mode is denoted as the fast battery supply current, and the fast battery supply current is denoted as I kxg The supply voltage of the battery in the fast mode is denoted as the fast battery supply voltage, and the fast battery supply voltage is denoted as U kxg ;

[0077] Where ; ; ; ;

[0078] The supercapacitor is charged with the fast capacitor supply current and fast capacitor supply voltage, and the battery is charged with the fast battery supply current and fast battery supply voltage. When the supercapacitor is fully charged, the battery is charged with the supply current and supply voltage of the power supply;

[0079] When the combined power state of the supercapacitor and the battery is not in the low power state, the supercapacitor and the battery discharge;

[0080] Obtain the power consumption current of the electrical equipment in the new energy vehicle, and denote the obtained power consumption current of the electrical equipment in the new energy vehicle as I y, set the power consumption current threshold of the electrical equipment according to the actual situation, and record the set power consumption current threshold of the electrical equipment as I0;

[0081] When I y ≤I0, the battery discharges to provide the power consumption current of the electrical equipment;

[0082] When I y >I0, the supercapacitor and the battery are used for hybrid discharge to provide the power consumption current of the electrical equipment;

[0083] It should be further noted that in the specific implementation process, the process of hybrid discharge by the supercapacitor and the battery includes:

[0084] Obtain the initial discharge currents of the supercapacitor and the battery, and record the obtained initial discharge current of the supercapacitor as I cc , and record the obtained initial discharge current of the battery as I xc ;

[0085] Among them, ; ;

[0086] The discharge currents of the supercapacitor and the battery change with time. Obtain the changing discharge currents of the supercapacitor and the battery according to the obtained initial discharge currents of the supercapacitor and the battery, and record the changing discharge current of the battery as I x (t), and record the changing discharge current of the supercapacitor as I c (t);

[0087] Among them, ; ; k is the discharge current adjustment parameter, and t is the time;

[0088] Use the changing discharge currents of the supercapacitor and the battery to supply power to the electrical equipment in the new energy vehicle until the changing discharge current of the battery is the same as the power consumption current of the electrical equipment, and the changing discharge currents of the supercapacitor and the battery stop changing. Record the changing discharge current of the battery after stopping changing as the stopped changing discharge current, and supply power to the electrical equipment in the new energy vehicle through the stopped changing discharge current of the battery. When the power consumption current of the electrical equipment in the new energy vehicle changes, the changing discharge currents of the supercapacitor and the battery change accordingly, and use the changed changing discharge currents of the supercapacitor and the battery to supply power to the electrical equipment in the new energy vehicle.

[0089] The present invention also discloses a hybrid energy storage method for a supercapacitor and battery hybrid energy storage system, including the following steps:

[0090] Step 1: Obtain the state data of the supercapacitor and the battery;

[0091] Step 2: Analyze the status data of the obtained supercapacitor and battery to obtain the hybrid state of charge of the supercapacitor and battery;

[0092] Step 3: Charge and discharge the supercapacitor and battery according to the obtained hybrid state of charge of the supercapacitor and battery.

[0093] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A supercapacitor and battery hybrid energy storage system, including an energy storage center, characterized in that, The energy storage center is communicatively connected to a data acquisition module, a data analysis module, and a charge and discharge module; The data acquisition module is used to acquire the status data of the supercapacitor and the battery; The data analysis module is used to analyze the acquired status data of the supercapacitor and the battery to obtain the hybrid state of charge of the supercapacitor and the battery; The charge and discharge module is used to charge and discharge the supercapacitor and the battery according to the obtained hybrid state of charge of the supercapacitor and the battery; When the hybrid state of charge of the supercapacitor and the battery is not in the low state of charge, the supercapacitor and the battery are discharged; Obtain the power consumption current of the in-vehicle electrical equipment in a new energy vehicle, and denote the obtained power consumption current of the in-vehicle electrical equipment in the new energy vehicle as I y , set the power consumption current threshold of the electrical equipment according to the actual situation, and denote the set power consumption current threshold of the electrical equipment as I0; When I y ≤ I0, the battery discharges to provide the current for the electrical equipment. When I y > I0, the supercapacitor and the battery are used for hybrid discharge to provide the current for the electrical equipment. The process of hybrid discharge by the supercapacitor and the battery includes: Obtain the initial discharge currents of the supercapacitor and the storage battery, and denote the obtained initial discharge current of the supercapacitor as I cc and denote the obtained initial discharge current of the storage battery as I xc ; Among them, ; ; The discharge currents of the supercapacitor and the storage battery change with time. The changing discharge currents of the supercapacitor and the storage battery are obtained based on the initially acquired discharge currents of the supercapacitor and the storage battery. Denote the changing discharge current of the storage battery as I x (t), and denote the changing discharge current of the supercapacitor as I c (t); Among them, ; ; k is the discharge current adjustment parameter, and t is the time; Using the varying discharge currents of the supercapacitor and the battery to supply power to the electrical equipment in the new energy vehicle until the varying discharge current of the battery is the same as the electrical current of the electrical equipment, at which point the varying discharge currents of the supercapacitor and the battery stop changing. Denote the varying discharge current of the battery after stopping the change as the stopped changing discharge current, and supply power to the electrical equipment in the new energy vehicle through the stopped changing discharge current of the battery. When the electrical current of the electrical equipment in the new energy vehicle changes, the varying discharge currents of the supercapacitor and the battery change accordingly, and use the changed varying discharge currents of the supercapacitor and the battery to supply power to the electrical equipment in the new energy vehicle.

2. The supercapacitor and battery hybrid energy storage system according to claim 1, wherein The process of the data acquisition module acquiring the status data of the supercapacitor and the battery includes: The status data of the supercapacitor and the battery includes the discharge voltage, discharge current, and remaining charge of the supercapacitor and the battery; The data acquisition module is composed of a voltage acquisition terminal, a current acquisition terminal, and a remaining charge acquisition terminal; Install the voltage acquisition terminal, current acquisition terminal, and remaining charge acquisition terminal at the corresponding positions in the new energy vehicle, and respectively obtain the discharge voltage, discharge current, and remaining charge of the supercapacitor and the battery in the new energy vehicle through the installed voltage acquisition terminal, current acquisition terminal, and remaining charge acquisition terminal.

3. The supercapacitor and battery hybrid energy storage system according to claim 2, wherein, The process of the data analysis module analyzing the acquired status data of the supercapacitor and the battery includes: Add the discharge current of the supercapacitor and the discharge current of the battery to obtain the hybrid discharge current of the supercapacitor and the battery, add the discharge voltage of the supercapacitor and the discharge voltage of the battery to obtain the hybrid discharge voltage of the supercapacitor and the battery, and add the remaining charge of the supercapacitor and the remaining charge of the battery to obtain the hybrid remaining charge of the supercapacitor and the battery; Obtain the hybrid state of charge coefficient of the supercapacitor and the battery based on the obtained hybrid discharge current, hybrid discharge voltage, and hybrid remaining charge of the supercapacitor and the battery. Denote the obtained hybrid state of charge coefficient of the supercapacitor and the battery as IC, set the threshold range of the hybrid state of charge coefficient of the supercapacitor and the battery, and denote the set threshold range of the hybrid state of charge coefficient of the supercapacitor and the battery as (IC0, IC1); Obtain the hybrid state of charge of the supercapacitor and the battery according to the comparison result between the obtained hybrid state of charge coefficient of the supercapacitor and the battery and the set threshold range of the hybrid state of charge coefficient of the supercapacitor and the battery.

4. The supercapacitor and battery hybrid energy storage system according to claim 3, characterized in that, The process of obtaining the hybrid state of charge of the supercapacitor and the battery includes: When IC ≤ IC0, the hybrid state of charge of the supercapacitor and the battery is in a low state of charge; When IC0 < IC < IC1, the hybrid state of charge of the supercapacitor and the battery is in a normal state of charge; When IC ≥ IC1, the hybrid state of charge of the supercapacitor and the battery is in a high state of charge.

5. The supercapacitor and battery hybrid energy storage system according to claim 4, wherein The process of the charge and discharge module charging and discharging the supercapacitor and the battery according to the obtained hybrid state of charge of the supercapacitor and the battery includes: The charge and discharge module is provided with a voltage and current distribution unit; When the hybrid state of charge of the supercapacitor and the battery is in a low state of charge, charge the supercapacitor and the battery; The new energy vehicle owner selects a corresponding charging mode according to the actual situation, and the charging mode includes a fast charging mode and a normal charging mode; Obtain the supply current and supply voltage of the power supply. The voltage and current distribution unit sets the distribution ratio of the supercapacitor and the battery according to the charging mode, obtains the supply current and supply voltage of the supercapacitor and the battery, and charges the supercapacitor according to the obtained supply current and supply voltage of the supercapacitor, and charges the battery according to the obtained supply current and supply voltage of the battery.

6. The supercapacitor and battery hybrid energy storage system according to claim 5, wherein, The process of obtaining the supply current and supply voltage of the supercapacitor and the battery includes: Obtain the supply current and supply voltage of the supercapacitor according to the supply current, supply voltage of the power supply and the distribution ratio of the supercapacitor, and obtain the supply current and supply voltage of the battery according to the supply current, supply voltage of the power supply and the distribution ratio of the battery.

7. A supercapacitor and battery hybrid energy storage method, specifically applied to the supercapacitor and battery hybrid energy storage system according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Obtain the state data of the supercapacitor and the battery; Step 2: Analyze the obtained state data of the supercapacitor and the battery to obtain the hybrid state of charge of the supercapacitor and the battery; Step 3: Charge and discharge the supercapacitor and the battery according to the obtained hybrid state of charge of the supercapacitor and the battery.

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