Energy storage system and energy storage control method thereof

Abstract

The invention discloses an energy storage system and an energy storage control method thereof, and belongs to the technical field of external energy supply of energy storage systems. The energy storage system comprises an energy storage device, a control device, a power generation device and a cooling device; the energy storage device is used for storing electric energy; the control device is connected with the energy storage device and used for controlling input and output of electric energy. The power generation device is connected with the control device and used for supplying power to the control device in an external power supply mode. The cooling device is connected with the power generation device so as to drive the power generation device to generate power by connecting flowing cooling liquid, and power supply to the control device is achieved. The power generation device is connected into the cooling device, the power generation device is driven to supply power to the control device through flowing of the cooling liquid, electricity does not need to be taken from the energy storage battery all the time, power shortage damage is avoided, and the service life of the energy storage battery can be effectively prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy supply outside energy storage system, and particularly relates to an energy storage system and an energy storage control method thereof. BACKGROUND

[0002] In large-scale battery energy storage occasions such as existing energy storage power stations and new energy stations, the power supply strategy of BCMU (Battery Cluster Management Unit) and SMC (Submodule Control) usually has: directly taking power from the battery for power supply, which will consume the battery power all the time when the battery is not put into operation, and finally will cause the battery to be damaged due to power loss; directly taking power from the H-bridge module DC side, which will reduce the DC side voltage, affect the working performance of the energy storage system, and when the H-bridge unit fails, the power supply will be lost, and the energy storage system will lose the control function of the cluster battery. SUMMARY

[0003] The application aims to solve the technical problem that the existing technology directly takes power from the energy storage battery, which reduces the service life of the energy storage battery.

[0004] Technical scheme: In a first aspect, an embodiment of the application provides an energy storage system, comprising:

[0005] An energy storage device configured to store electric energy;

[0006] A control device connected with the energy storage device, the control device being configured to control the input and output of the electric energy;

[0007] A power generation device connected with the control device, the power generation device being configured to supply power to the control device;

[0008] A cooling device connected with the power generation device, the cooling device being configured to access a cooling liquid to drive the power generation device to generate power through the flow of the cooling liquid.

[0009] In some embodiments, a voltage stabilizer is further included, an input end of the voltage stabilizer being connected with the power generation device, an output end of the voltage stabilizer being connected with the control module, and the voltage stabilizer being configured to receive the electric energy output by the power generation device and perform voltage stabilization operation and then output to the control module.

[0010] In some embodiments, the energy storage device comprises:

[0011] A power supply configured to store electric energy;

[0012] a filter connected in series with the power supply;

[0013] an H-bridge module connected in parallel with the filter;

[0014] a bypass switch connected in parallel with the H-bridge module.

[0015] In some embodiments, the energy storage device further comprises:

[0016] a first switch connected in series between the positive pole of the power supply and the filter; the control terminal of the first switch is connected with the control device;

[0017] a second switch connected in series between the negative pole of the power supply and the filter; the control terminal of the second switch is connected with the control device.

[0018] In some embodiments, the energy storage device further comprises:

[0019] a third switch connected in series between the positive pole of the power supply and the first switch; the control terminal of the third switch is connected with the control device;

[0020] a fourth switch connected in series between the positive pole of the power supply and the first switch, the fourth switch being connected in parallel with the third switch; the control terminal of the fourth switch is connected with the control device;

[0021] a first resistor connected in series with the third switch, the first resistor being located at the low-potential side of the third switch.

[0022] In some embodiments, the control device comprises:

[0023] a first control module connected with the control terminal of the first switch, the control terminal of the second switch, the control terminal of the third switch, and the control terminal of the fourth switch;

[0024] a second control module connected with the first control module; the second control module is connected with the H-bridge module, and is configured to control the on-off of the insulated gate bipolar transistor in the H-bridge module; the second control module is connected with the control terminal of the bypass switch, and is configured to control the on-off of the bypass switch.

[0025] In some embodiments, the power supply is connected with the control module, and the H-bridge module is connected with the control module;

[0026] When the power generation device is abnormal, the H-bridge module and / or the power supply supplies power to the control device.

[0027] In some embodiments, a deionization device is further included, which is connected with the cooling device and is configured to reduce the conductivity of the cooling liquid.

[0028] In some embodiments, the power generation device comprises a water turbine generator.

[0029] In a second aspect, embodiments of the present application provide an energy storage control method based on the energy storage system of any one of the first aspect, comprising the following steps:

[0030] determining the total power of the cooling device, wherein the total power comprises the power required for the operation of the control device and the power required to meet the cooling requirement;

[0031] based on the total power, the cooling device drives the cooling liquid to flow after being connected with the cooling liquid, and drives the power generation device to generate power to supply power to the control device.

[0032] In some embodiments, the total power is represented by the following formula:

[0033] P = p1+ 3np b / η;

[0034] wherein P is the total power of the cooling device; p1 is the power required for the cooling device to meet the cooling requirement; n is the number of control devices; p b is the power required for the operation of the control device; and η is the power generation efficiency of the power generation device.

[0035] In some embodiments, the energy storage control method further comprises:

[0036] in response to the failure of the power generation device, controlling the power supply and / or the H-bridge module to supply power to the control device.

[0037] In some embodiments, the energy storage control method further comprises:

[0038] obtaining working state data of the third switch and the fourth switch by the first control module to generate a first signal and sending it to the second control module;

[0039] determining a first condition, generating a second signal based on the first condition by the second control module, and sending it to the first control module;

[0040] controlling the on-off of the third switch and the fourth switch by the first control module based on the second signal.

[0041] In some embodiments, the energy storage control method further comprises:

[0042] determining a second condition, generating a third signal based on the second condition by the second control module, and sending to the first control module;

[0043] controlling the first switch and the second switch by the first control module based on the third signal.

[0044] In some embodiments, the energy storage control method further comprises:

[0045] determining a third condition, generating a fourth signal based on the third condition by the second control module, and sending to the H-bridge module;

[0046] controlling the on-off of the insulated gate bipolar transistor in the H-bridge module based on the fourth signal by the H-bridge module.

[0047] In some embodiments, the energy storage control method further comprises:

[0048] determining a fourth condition, generating a fifth signal based on the fourth condition by the second control module, and controlling the on-off of the bypass switch based on the fifth signal.

[0049] Advantages: Compared with the prior art, the energy storage system provided by the embodiment of the application comprises an energy storage device, a control device, a power generation device, and a cooling device; the energy storage device is used for storing electric energy; the control device is connected with the energy storage device and is used for controlling the input and output of electric energy; the power generation device is connected with the control device and is used for supplying power to the control device in a power supply mode; and the cooling device is connected with the power generation device to drive the power generation device to generate power through the flowing cooling liquid, thereby achieving power supply to the control device. The embodiment of the application connects the power generation device in the cooling device, drives the power generation device to supply power to the control device through the flowing cooling liquid, does not need to take power from the energy storage battery all the time, avoids causing power loss and damage, and can effectively prolong the service life of the energy storage battery.

[0050] The embodiment of the application further provides an energy storage control method for controlling the energy storage system provided by the embodiment of the application. The energy storage control method comprises determining the total power of the cooling device, the total power comprising the power required for the operation of the control device and the power required for meeting the cooling requirement; and based on the total power, the cooling device drives the flowing of the cooling liquid after being connected with the cooling liquid, drives the power generation device to generate power, and supplies power to the control device. The embodiment of the application connects the power generation device in the cooling device, drives the power generation device to supply power to the control device through the flowing cooling liquid, does not need to take power from the energy storage battery all the time, avoids causing power loss and damage, and can effectively prolong the service life of the energy storage battery. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art based on the drawings without creative effort should be within the protection scope of the present application.

[0052] Figure 1 The first system diagram of the energy storage system provided by the embodiments of the present application (the scheme of taking energy from the power supply is not shown);

[0053] Figure 2 The second system diagram of the energy storage system provided by the embodiments of the present application (the scheme of taking energy from the power supply is shown);

[0054] Figure 3 The partial enlarged view of A in Figure 1 and Figure 2

[0055] Figure 4 The module diagram of the energy storage system provided by the embodiments of the present application;

[0056] Figure 5 The step flow chart of the energy storage control method provided by the embodiments of the present application;

[0057] The drawings are as follows: 100, energy storage device; 110, power supply; 120, filter; 130, H-bridge module; 140, bypass switch; 150, first switch; 160, second switch; 170, third switch; 180, fourth switch; 190, first resistor; 200, control device; 210, first control module; 220, second control module; 300, power generation device; 400, cooling device; 500, voltage stabilizer. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should be within the protection scope of the present application.

[0059] Please refer to Figures 1 to 4 ​The embodiment of the present application provides a kind of energy storage system, including energy storage device 100, control device 200, power generation device 300 and cooling device 400;Energy storage device 100 is used to store electric energy;Control device 200 is connected with energy storage device 100, for controlling the input and output of electric energy;Power generation device 300 is connected with control device 200, for supplying power to control device 200 in the mode of external power supply;Cooling device 400 is connected with power generation device 300, to drive power generation device 300 to generate electricity by accessing flowing cooling liquid, realize the power supply of control device 200;The present application accesses power generation device 300 in cooling device 400, drives power generation device 300 for control device 200 by the flow of cooling liquid, need not always take electricity from energy storage battery, avoid causing loss of power damage, can effectively prolong the service life of energy storage battery.

[0060] In some embodiments, referring to Figure 1 And Figure 2 The energy storage system provided by the embodiment of the present application further includes voltage stabilizer 500, the input end of voltage stabilizer 500 is connected with power generation device 300, the output end of voltage stabilizer 500 is connected with control module, voltage stabilizer 500 is used to receive fluctuating voltage output by power generation device 300, and stable voltage is output to control module after voltage stabilizing operation.

[0061] In some embodiments, referring to Figures 1 to 3 The energy storage system provided by the embodiment of the present application includes energy storage device 100, and energy storage device 100 is used to store electric energy.

[0062] In some embodiments, referring to Figures 1 to 3 Energy storage device 100 includes power supply 110, specifically, power supply 110 can be selected from battery module formed by a plurality of chargeable and dischargeable batteries in series, to store electric energy when power grid appears wave crest, release electric energy when power grid appears wave trough, improve the fluctuation of power grid by peak clipping and valley filling effect.

[0063] In some embodiments, referring to Figures 1 to 3 Energy storage device 100 further includes filter 120, filter 120 is connected in series with power supply 110, for reducing the noise and interference of voltage or current in energy storage system, improving the stability and performance of energy storage system.

[0064] In some embodiments, referring to Figures 1 to 3 Energy storage device 100 further includes H bridge module 130, H bridge module 130 is connected in parallel with filter 120, for controlling the current flow direction between power supply 110 and load in energy storage system, realizing the storage and release of electric energy.

[0065] In some embodiments, referring to Figures 1 to 3The energy storage device 100 further comprises a bypass switch 140 connected in parallel with the H-bridge module 130, for isolating the H-bridge module 130 from the load when a large current impact or a circuit fault occurs, avoiding the spread of the fault and maintaining the normal operation of the system.

[0066] In some embodiments, referring to Figures 1 to 3 The energy storage device 100 further comprises a first switch 150 connected in series between the positive pole of the power supply 110 and the filter 120; the control end of the first switch 150 is connected with the control device 200, for receiving the control signal of the control device 200 to turn on or off. Specifically, the first switch 150 is the MSD+ part in the MSD (Manual Service Disconnect, a switching device used to disconnect the circuit).

[0067] In some embodiments, referring to Figures 1 to 3 The energy storage device 100 further comprises a second switch 160 connected in series between the negative pole of the power supply 110 and the filter 120; the control end of the second switch 160 is connected with the control device 200, for receiving the control signal of the control device 200 to turn on or off. Specifically, the first switch 150 is the MSD- part in the MSD (Manual Service Disconnect, a switching device used to disconnect the circuit).

[0068] In some embodiments, referring to Figures 1 to 3 The energy storage device 100 further comprises a third switch 170 connected in series between the positive pole of the power supply 110 and the first switch 150; the control end of the third switch 170 is connected with the control device 200, for receiving the control signal of the control device 200 to turn on or off.

[0069] In some embodiments, referring to Figures 1 to 3 The energy storage device 100 further comprises a fourth switch 180 connected in series between the positive pole of the power supply 110 and the first switch 150, and the fourth switch 180 is connected in parallel with the third switch 170; the control end of the fourth switch 180 is connected with the control device 200, for receiving the control signal of the control device 200 to turn on or off, cooperating with the third switch 170 to realize the charge and discharge control of the power supply 110.

[0070] In some embodiments, referring to Figures 1 to 3 The energy storage device 100 further comprises a first resistor 190 connected in series with the third switch 170, and the first resistor 190 is located at the low-potential side of the third switch 170.

[0071] In some embodiments, referring to Figures 1 to 2The control device 200 comprises a first control module 210 connected with the control end of the first switch 150, the control end of the second switch 160, the control end of the third switch 170 and the control end of the fourth switch 180, for obtaining the on-off state of the third switch 170 and the fourth switch 180, and controlling the on-off of the first switch 150, the second switch 160, the third switch 170 and the fourth switch 180 based on the control requirement. Specifically, the first control module 210 comprises a BCMU (Battery Cluster Management Unit) in communication with an SMC (Submodule Control) and an EMS (Energy Management System), for monitoring the state of the third switch 170 and the fourth switch 180 in real time and feeding back, and receiving the instruction of the SMC, and controlling the on-off of the first switch 150, the second switch 160, the third switch 170 and the fourth switch 180.

[0072] In some embodiments, referring to Figures 1 to 2 The control device 200 further comprises a second control module 220 connected with the first control module 210; the second control module 220 is connected with the H-bridge module 130, for controlling the on-off of the insulated gate bipolar transistor in the H-bridge module 130; and the second control module 220 is connected with the control end of the bypass switch 140, for controlling the on-off of the bypass switch 140. Specifically, the second control module 220 comprises an SMC, for monitoring the on-off state of the third switch 170 and the first switch 150 through the BCMU, and controlling the on-off state of the first switch 150, the second switch 160, the third switch 170 and the fourth switch 180 through the BCMU; and the SMC controls the on-off of the insulated gate bipolar transistor in the H-bridge module 130 and the on-off of the bypass switch 140.

[0073] In some embodiments, the power generation device 300 comprises a water turbine generator, the impeller of the water turbine generator is completely in the water pipe of the cooling device 400, the impeller is driven by the flow of the cooling liquid, and the water turbine generator is closely connected with the water pipe to ensure the sealing property.

[0074] In some embodiments, referring to Figures 1 to 2 The power supply 110 is connected with the control module, and the H-bridge module 130 is connected with the control module; when the power generation device 300 is working normally, the control module takes power from the power generation device 300, so as to avoid using the power in the power supply 110 and to avoid the power supply 110 from being out of power, which can effectively prolong the service life of the power supply 110. When the power generation device 300 is faulty, the control module takes power from the power supply 110 and / or the H-bridge module 130 to maintain the normal work of the control module.

[0075] In some embodiments, the energy storage system provided by the embodiments of the present application further comprises a deionization device connected with the cooling device 400, and the deionization device is used to reduce the conductivity of the cooling liquid. Specifically, when the cooling device 400 is started, the cooling liquid is introduced into the cooling water pipe to discharge the gas in the pipe, and the conductivity of the cooling liquid is reduced by the deionization device, and then the cooling liquid flows through the hydroelectric generator to drive the power generation device 300 to generate electricity.

[0076] It can be understood that the energy storage system provided by the embodiments of the present application comprises an energy storage device 100, a control device 200, a power generation device 300 and a cooling device 400; the energy storage device 100 is used to store electrical energy; the control device 200 is connected with the energy storage device 100 and is used to control the input and output of electrical energy; the power generation device 300 is connected with the control device 200 and is used to supply power to the control device 200 in the form of external power supply; the cooling device 400 is connected with the power generation device 300 to drive the power generation device 300 to generate electricity by connecting with the flowing cooling liquid, so as to realize the power supply to the control device 200; the power generation device 300 is connected in the cooling device 400 in the embodiments of the present application, and the power generation device 300 is driven by the flowing cooling liquid to supply power to the control device 200, so that the power is not always taken from the energy storage battery, thereby avoiding the damage caused by power loss, and the service life of the energy storage battery can be effectively prolonged.

[0077] Correspondingly, please refer to Figure 5 The embodiments of the present application provide an energy storage control method of an energy storage system, which is used to control the energy storage system provided by the embodiments of the present application, and the energy storage control method comprises determining the total power of the cooling device 400, the total power comprising the power required for the operation of the control device 200 and the power required for meeting the cooling requirement; based on the total power, the cooling device 400 drives the flowing of the cooling liquid after connecting with the cooling liquid, and drives the power generation device 300 to generate electricity to supply power to the control device 200. The power generation device 300 is connected in the cooling device 400 in the embodiments of the present application, and the power generation device 300 is driven by the flowing cooling liquid to supply power to the control device 200, so that the power is not always taken from the energy storage battery, thereby avoiding the damage caused by power loss, and the service life of the energy storage battery can be effectively prolonged.

[0078] Please refer to Figure 5 In some embodiments, the energy storage method provided by the embodiments of the present application comprises the following steps:

[0079] Step a: determining the total power of the cooling device 400, the total power comprising the power required for the operation of the control device 200 and the power required for meeting the cooling requirement.

[0080] Specifically, the power generation device 300 generates electricity by the flow kinetic energy of the cooling liquid in the cooling system, and the cooling device 400 increases the working power on the basis of the power meeting the cooling demand to drive the power generation device 300 to generate sufficient electricity to drive the control device 200 to act. Specifically, the total power is represented by the formula:

[0081] P = p1 + 3npb / η;

[0082] Wherein, P is the total power of the cooling device 400; p1 is the power required by the cooling device 400 to meet the cooling requirement; n is the number of control devices 200; pb is the power required by the control device 200 to work; η is the power generation efficiency of the power generation device 300.

[0083] Step b: Based on the total power, the cooling device 400 drives the cooling liquid to flow after connecting the cooling liquid to supply power to the control device 200.

[0084] In some embodiments, after the management connection of the cooling device 400 is completed, the cooling liquid is continuously injected into the pipeline, and the air in the pipe is continuously pressed to the exhaust tank in the following direction, the exhaust tank valve is opened to exhaust the air, and the above process is repeated until the air in the pipe is completely exhausted.

[0085] In some embodiments, before the cooling device 400 is started, the water turbine generator impeller is completely placed in the water pipe, and the water turbine generator is closely connected with the water pipe structure, so that the cooling liquid does not flow out after the cooling system is operated, and the impeller is driven by the flowing cooling liquid after the waterway is filled with the cooling liquid.

[0086] In some embodiments, the water turbine generator and the voltage stabilizer 500 are connected by wires, the voltage stabilizer 500 converts the fluctuating voltage provided by the water turbine generator into a stable voltage, and then provides the stable voltage to the BCMU and the SMC through the wires.

[0087] In some embodiments, the energy storage control method provided by the application also includes:

[0088] Step c: In response to the failure of the power generation device 300, the control power supply 110 and / or the H-bridge module 130 supply power to the control device 200.

[0089] Specifically, when the power generation device 300 is working normally, the control module takes power from the power generation device 300, avoids using the power in the power supply 110, avoids power loss of the power supply 110, and can effectively prolong the service life of the power supply 110. When the power generation device 300 fails, the control module takes power from the power supply 110 and / or the H-bridge module 130 to maintain the normal work of the control module.

[0090] In some embodiments, the energy storage control method provided by the embodiments of the present application further comprises:

[0091] Step d: The first control module 210 acquires the working state data of the third switch 170 and the fourth switch 180 to generate a first signal and sends it to the second control module 220.

[0092] Specifically, after the BCMU and the SMC are started, the state of the third switch 170 and the fourth switch 180 is monitored in real time and fed back to the SMC.

[0093] Step e: Determine the first condition, and the second control module 220 generates a second signal based on the first condition and sends it to the first control module 210; the first control module 210 controls the on-off of the third switch 170 and the fourth switch 180 based on the second signal.

[0094] Specifically, after the BCMU and the SMC are started, when the first condition is met, the SMC sends a control instruction to the BCMU to control the on-off of the third switch 170 and the fourth switch 180.

[0095] In some embodiments, the energy storage control method provided by the embodiments of the present application further comprises:

[0096] Step f: Determine the second condition, and the second control module 220 generates a third signal based on the second condition and sends it to the first control module 210; the first control module 210 controls the on-off of the first switch 150 and the second switch 160 based on the third signal.

[0097] Specifically, after the BCMU and the SMC are started, when the second condition is met, the SMC sends a control instruction to the BCMU to control the on-off of the first switch 150 and the second switch 160.

[0098] In some embodiments, the energy storage control method provided by the embodiments of the present application further comprises:

[0099] Step g: Determine the third condition, and the second control module 220 generates a fourth signal based on the third condition and sends it to the H-bridge module 130; the H-bridge module 130 controls the on-off of the insulated gate bipolar transistor in the H-bridge module 130 based on the fourth signal.

[0100] In some embodiments, the energy storage control method provided by the embodiments of the present application further comprises:

[0101] Step h: Determine the fourth condition, and the second control module 220 generates a fifth signal based on the fourth condition and controls the on-off of the bypass switch 140 based on the fifth signal.

[0102] It can be understood that the energy storage control method of the energy storage system provided by the embodiments of the present application is used to control the energy storage system provided by the embodiments of the present application, and the energy storage control method comprises determining the total power of the cooling device 400, the total power comprising the power required for the operation of the control device 200 and the power required to meet the cooling requirement; based on the total power, the cooling device 400 drives the flow of the cooling liquid after being connected to the cooling liquid, drives the power generation device 300 to generate power, and supplies power to the control device 200. The present application connects the power generation device 300 in the cooling device 400, drives the power generation device 300 to supply power to the control device 200 through the flow of the cooling liquid, does not need to take power from the energy storage battery all the time, avoids causing damage due to power loss, and can effectively prolong the service life of the energy storage battery.

[0103] The above describes in detail the energy storage system and the energy storage control method thereof provided by the embodiments of the present application, and the principles and implementation manners of the present application are described by applying specific examples; the above embodiment description is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application range will be changed; in conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An energy storage system, characterized by, The application relates to a power storage device (100) configured to store electric energy; a control device (200) connected with the power storage device (100) and configured to control input and output of the electric energy; a power generation device (300) connected with the control device (200) and configured to supply power to the control device (200); and a cooling device (400) connected with the power generation device (300) and configured to access a cooling liquid to drive the power generation device (300) to generate power through flow of the cooling liquid. The application further relates to a voltage stabilizer (500) having an input end connected with the power generation device (300) and an output end connected with the control module, and being configured to receive the electric energy output by the power generation device (300) and output to the control module after voltage stabilization. The power storage device (100) comprises a power supply (110) configured to store electric energy; a filter (120) connected in series with the power supply (110); an H-bridge module (130) connected in parallel with the filter (120); and a bypass switch (140) connected in parallel with the H-bridge module (130). The power storage device (100) further comprises a first switch (150) connected in series between a positive electrode of the power supply (110) and the filter (120), and having a control end connected with the control device (200); and a second switch (160) connected in series between a negative electrode of the power supply (110) and the filter (120), and having a control end connected with the control device (200). The power storage device (100) further comprises a third switch (170) connected in series between the positive electrode of the power supply (110) and the first switch (150), and having a control end connected with the control device (200); a fourth switch (180) connected in series between the positive electrode of the power supply (110) and the first switch (150), and connected in parallel with the third switch (170), and having a control end connected with the control device (200); and a first resistor (190) connected in series with the third switch (170) and located at a low-potential side of the third switch (170).

2. The energy storage system of claim 1, wherein, The control device (200) comprises 3. The energy storage system of claim 1, wherein, ​ ​ ​ ​ ​ 4. The energy storage system of claim 3, wherein, ​ ​ ​ 5. The energy storage system of claim 4, wherein, ​ ​ ​ ​ 6. The energy storage system of claim 5, wherein, ​ A first control module (210) is connected with the control end of the first switch (150), the control end of the second switch (160), the control end of the third switch (170), and the control end of the fourth switch (180); A second control module (220) is connected with the first control module (210); the second control module (220) is connected with the H-bridge module (130), and the second control module (220) is configured to control the on-off of the insulated gate bipolar transistor in the H-bridge module (130); the second control module (220) is connected with the control end of the bypass switch (140), and the second control module (220) is configured to control the on-off of the bypass switch (140).

7. The energy storage system of claim 3, wherein, The power supply (110) is connected with the control module, and the H-bridge module (130) is connected with the control module; When the power generation device (300) is abnormal, the H-bridge module (130) and / or the power supply (110) supply power to the control device (200).

8. The energy storage system of claim 1, wherein, The power generation device (300) comprises a water turbine generator.

9. The energy storage system of claim 1, wherein, Further comprising a deionization device connected with the cooling device (400), and the deionization device is configured to reduce the conductivity of the cooling liquid.

10. A method of energy storage control based on the energy storage system of any one of claims 1-9, characterized in that, The method comprises the following steps: Determine the total power of the cooling device (400), which comprises the power required for the operation of the control device (200) and the power required to meet the cooling requirements; Based on the total power, the cooling device (400) drives the cooling liquid to flow after connecting with the cooling liquid, drives the power generation device (300) to generate power, and supplies power to the control device (200).

11. The energy storage control method of claim 10, wherein, The representation formula of the total power comprises: P = pi + 3np b / η; Wherein, P is the total power of the cooling device (400); p1 is the power required for the cooling device (400) to meet the cooling requirement; n is the number of control devices (200); p b is the power required for the control device (200) to work; η is the power generation efficiency of the power generation device (300).

12. The energy storage control method of claim 10, wherein, The energy storage control method further comprises: In response to the failure of the power generation device (300), the power supply (110) and / or the H-bridge module (130) supply power to the control device (200).

13. The energy storage control method of claim 10, wherein, The energy storage control method further comprises: The first control module (210) obtains the working state data of the third switch (170) and the fourth switch (180) to generate a first signal and sends it to the second control module (220); Determine the first condition, generate a second signal based on the first condition through the second control module (220), and send it to the first control module (210); The first control module (210) controls the on-off of the third switch (170) and the fourth switch (180) based on the second signal.

14. The energy storage control method of claim 10, wherein, The energy storage control method further comprises: Determine the second condition, generate a third signal based on the second condition through the second control module (220), and send it to the first control module (210); The first control module (210) controls the on-off of the first switch (150) and the second switch (160) based on the third signal.

15. The energy storage control method of claim 10, wherein, The energy storage control method further comprises: Determine the third condition, generate a fourth signal based on the third condition through the second control module (220), and send it to the H-bridge module (130); The H-bridge module (130) controls on-off of the insulated gate bipolar transistor in the H-bridge module (130) based on the fourth signal.

16. The energy storage control method of claim 10, wherein, The energy storage control method further comprises: A fourth condition is determined, a fifth signal is generated by the second control module (220) based on the fourth condition, and on-off of the bypass switch (140) is controlled based on the fifth signal.

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