KR102572526B1 - Temperature control method for energy storage battery compartment and discharging control method for energy storage system, and energy storage application system - Google Patents

Abstract

A temperature control method for an energy storage battery compartment, a discharge control method for an energy storage system, and an energy storage application system are provided. The temperature control method includes: an energy storage calculation model representing a relationship between a life characteristic parameter of an energy storage system in which an energy storage battery compartment is located and a temperature of a cell of an energy storage battery in the energy storage battery compartment, according to a battery decay rule. constructing; determining, based on the energy storage calculation model, an allowable temperature range of the cell when the lifetime characteristic parameter of the energy storage system meets a requirement; and controlling operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell.

Description

Temperature control method for energy storage battery compartment and discharge control method and energy storage application system for energy storage system

The present disclosure relates to the field of control technology, and more particularly to a temperature control method for an energy storage battery compartment and a discharge control method for an energy storage system and an energy storage application system.

In an energy storage system, temperature control devices such as air conditioners and fans are generally provided to ensure that the cells of the energy storage battery and other supporting electrical devices in the energy storage battery compartment can operate within a safe temperature range. .

In existing temperature control solutions of energy storage systems, the air conditioner is typically configured to operate in a single automatic mode of operation, and then the control module is configured to initiate cooling or heating based on the ambient temperature and the cell temperature. It controls the temperature regulating device and thus implements the temperature control of the energy storage system. However, this control solution only provides single control over temperature without considering the overall benefit of the energy storage system.

In view of the above, in order to improve the overall benefits of the energy storage system, a temperature control method for an energy storage battery compartment, a discharge control method for an energy storage system, and an energy storage application system are provided in the present disclosure. do.

In order to achieve the above objects, technical solutions provided by embodiments of the present disclosure are as follows.

According to a first aspect of the present disclosure, a temperature control method for an energy storage battery compartment is provided. The method is:

constructing an energy storage calculation model representing a relationship between a lifetime characteristic parameter of an energy storage system in which an energy storage battery compartment is located and a temperature of a cell of an energy storage battery in the energy storage battery compartment, according to a battery decay rule;

determining, based on the energy storage calculation model, an allowable temperature range of the cell when the lifetime characteristic parameter of the energy storage system meets a requirement; and

based on the allowable temperature range of the cell, controlling operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment.

In one embodiment, in the temperature control method above, controlling the operation of a temperature regulating device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell. The steps are:

Controlling the operation of the temperature regulating device to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell and the preset allowable range of the environmental temperature of the energy storage system. Include steps.

In one embodiment, in the above temperature control method, based on the allowable temperature range of the cell and the preset allowable range of the ambient temperature of the energy storage system, the temperature adjustment for the energy storage battery compartment is implemented. The steps of controlling the operation of the temperature regulation device are:

obtaining a current temperature of the cell and a current temperature of the energy storage battery compartment;

comparing the current temperature of the cell with an allowable temperature range of the cell, and comparing the current temperature of the energy storage battery compartment with a preset allowable range of ambient temperature of the energy storage system;

Cooling ( controlling the temperature regulating device to start cooling;

When the current temperature of the cell is less than the lower limit of the allowable temperature range of the cell or the current temperature of the energy storage battery compartment is less than the lower limit of the preset allowable range of the ambient temperature of the energy storage system controlling the temperature adjusting device to start heating; and

to be in a standby state when the current temperature of the cell is within the allowable temperature range of the cell and the current temperature of the energy storage battery compartment is within the preset allowable range of the ambient temperature of the energy storage system. and controlling the temperature regulating device.

In an embodiment, in the above temperature control method, a preset allowable range of an ambient temperature of the energy storage system when the energy storage battery is in an operating state is the energy storage battery when the energy storage battery is in a standby state. different from the preset acceptable range of ambient temperature of the storage system;

Before the step of comparing the current temperature of the cell with the allowable temperature range of the cell and comparing the current temperature of the energy storage battery compartment with a preset allowable range of the ambient temperature of the energy storage system, the temperature control method silver:

further comprising determining a state of the energy storage battery;

Comparing the current temperature of the energy storage battery compartment with a preset acceptable range of ambient temperature of the energy storage system comprises:

comparing the current temperature of the energy storage battery compartment with the upper and lower limits of a predetermined allowable range of ambient temperature of the energy storage system under a corresponding condition of the energy storage battery.

In one embodiment, after controlling operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell, the temperature control method comprises: :

determining whether the power to be output by a power conversion system is greater than the actual charge-discharge power of the energy storage battery at a previous time when the energy storage battery is in an operating state;

controlling the temperature regulating device to start cooling when the power to be output is greater than the actual charge-discharge power of the energy storage battery at a previous time; and

and controlling the temperature regulating device to start heating when the power to be output is equal to or less than the actual charge-discharge power of the energy storage battery at a previous time.

In one embodiment, after controlling operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell, the temperature control method comprises: :

Whether a difference between a preset charge-discharge time of the energy storage system and a current time is greater than a reserved reaction time period of the temperature regulating device when the state of the energy storage battery is switched from a standby state to an operating state; deciding;

When the difference between the preset charge-discharge time and the current time of the energy storage system is equal to or less than the reserved reaction time period, the current temperature of the energy storage battery compartment and the energy controlling the temperature regulating device to start cooling or heating based on a relationship between preset allowable ranges of ambient temperature of the storage system; and

and controlling the temperature regulating device to maintain an original state when a difference between a preset charge-discharge time and a current time of the energy storage system is greater than the reserved reaction time period.

In one embodiment, in the above temperature control method, the lifetime characteristic parameter of the energy storage system is the total benefits of the energy storage battery compartment during its lifetime or the total on-off provided by the energy storage battery compartment during its lifetime. It is on-grid electricity.

In an embodiment, in the above temperature control method, when the lifespan characteristic parameter of the energy storage system is the total gain of the energy storage battery compartment during life, according to the battery decay rule, the lifespan characteristic parameter of the energy storage system and constructing an energy storage calculation model representing a relationship between the temperature of a cell of an energy storage battery in the energy storage battery compartment:

constructing a battery operating function representing a relationship between a temperature of the cell, preset operating years of a power station, and a battery capacity retention rate according to the battery decay rule;

installed capacity of the energy storage system, power consumption of the energy storage system, equivalent operating days, charging efficiency of the energy storage system, discharging efficiency of the energy storage system, the battery capacity retention rate and the energy constructing a function to calculate an annual benefit of the energy storage battery compartment based on the per unit gain of on-grid electricity provided by the storage system; and

and determining an energy storage calculation model of the energy storage battery compartment within the preset operating age based on the battery operating function and the function for calculating the annual gain.

According to a second aspect of the present disclosure, a discharge control method for an energy storage system is provided. The discharge control method is:

comprising a temperature control method for the energy storage battery compartment according to any one provided in the first aspect of the present disclosure;

After the step of determining the allowable temperature range of the cell when the life characteristic parameter of the energy storage system meets the requirements based on the energy storage calculation model, the discharge control method:

constructing a discharge calculation model representing a relationship between a discharge power of the energy storage system and a discharge characteristic parameter of the energy storage system, based on the allowable temperature range of the cell;

determining discharge power of the energy storage system based on the discharge calculation model; and

The method further includes controlling the energy storage battery to discharge with the discharge power of the energy storage system within a preset discharge time period.

In one embodiment, in the discharge control method, constructing a discharge calculation model representing a relationship between discharge power of the energy storage system and a discharge characteristic parameter of the energy storage system based on an allowable temperature range of the cell. Is:

Representing the relationship between the discharge power of the energy storage system, the discharge time period of the energy storage system, the installed capacity of the energy storage system, the battery capacity retention rate, the charging efficiency of the energy storage system, and the discharging efficiency of the energy storage system Construct a discharge power simulation function, and construct a power consumption function of the energy storage system representing a relationship between discharge power of the energy storage system and consumed power of a self-consumption device of the energy storage system; configuring a discharge efficiency function of the energy storage system representing a relationship between discharge power, battery discharge efficiency, line loss, efficiency of a power conversion system, and efficiency of a transformer of the energy storage system; and

and acquiring the discharge calculation model based on the discharge power simulation function, the power consumption function of the energy storage system, the discharge efficiency function of the energy storage system, and on-grid electricity rates.

In an embodiment, in the above discharge control method, the discharge characteristic parameter of the energy storage system is a total discharge gain of the energy storage system during a lifetime or a total amount of on-grid electricity provided by the energy storage system during a lifetime. am.

According to a third aspect of the present disclosure, an energy storage application system is provided. The system:

a controller, power conversion system and independent energy storage battery compartment;

an energy storage connection terminal of the energy storage battery compartment is connected to a transformer disposed at a grid-connection point through the power conversion system;

The controller is configured to perform a temperature control method according to any one provided in the first aspect of the present disclosure, and/or performs a discharge control method according to any one provided in the second aspect of the present disclosure. is configured to

In one embodiment, in the above energy storage application system, the controller is an energy management system disposed in the energy storage battery compartment.

In an embodiment, in the above energy storage application system, the energy storage battery compartment further includes an energy storage module, a battery combiner cabinet, a battery management system, a fire protection system, an air conditioner system and an environmental monitor;

the energy storage module is connected to the energy storage connection terminal in the energy storage battery compartment through the battery combiner cabinet;

the battery management system is communicatively coupled to the energy storage module;

The energy management system is configured to obtain electricity from a power grid through the transformer, and is communicatively connected to the fire protection system, the air conditioner system, the environment monitor, the battery management system, and the power conversion system, respectively.

In one embodiment, the above energy storage application system further includes a new energy generation system.

In an embodiment, in the above energy storage application system, the new energy generation system includes at least one of a photovoltaic power generation system, a wind power generation system, and a diesel power generation system.

In the temperature control method for an energy storage battery compartment according to the present disclosure, first, according to the battery decay rule, the energy representing the relationship between the life characteristic parameter of the energy storage system and the temperature of the cells of the energy storage battery in the energy storage battery compartment. construct a storage calculation model, thereby obtaining a relationship between the temperature of the cell and the gain of the energy storage system; Then, based on the energy storage calculation model, an allowable temperature range of the cell is determined when life characteristic parameters of the energy storage system meet the requirements, so that the temperature of the cell is controlled to be within the allowable range. allows the gain of the energy storage system to be maintained at a high level when Finally, based on the allowable temperature range of the cell, control the operation of the temperature regulating device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment, so that the temperature of the cell is within the allowable range. When tuned, it guarantees the overall gain of the energy storage system at a high level, which has an improved gain of the energy storage system over existing technologies.

In order to explain the technical solutions of the prior art or in the embodiments of the present disclosure more clearly, the drawings used in the description of the embodiments or the prior art are briefly described below. Obviously, the drawings in the following description merely show some embodiments of the present disclosure, and a person skilled in the art to which the present invention pertains may make other drawings according to the provided drawings without any creative work. can be obtained
1 is a flowchart of a temperature control method for an energy storage battery compartment according to an embodiment of the present disclosure.
2 is a flowchart of constructing an energy storage calculation model according to an embodiment of the present disclosure.
3 is a flowchart of dual closed-loop control according to one embodiment of the present disclosure.
4 is a flowchart of dual closed-loop control according to another embodiment of the present disclosure.
5 is a flowchart of a temperature control method for an energy storage battery compartment according to another embodiment of the present disclosure.
6 is a flowchart of a temperature control method for an energy storage battery compartment according to another embodiment of the present disclosure.
7 is a flowchart of a discharge control method for an energy storage system according to an embodiment of the present disclosure.
8 is a flowchart of constructing a discharge calculation model according to an embodiment of the present disclosure.
9 is a schematic structural diagram of an energy storage application system according to an embodiment of the present disclosure.
10 is a schematic structural diagram of an energy storage application system according to another embodiment of the present disclosure.
11 is a schematic diagram of a communication architecture of an energy storage application system according to one embodiment of the present disclosure.

Technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. Clearly, the embodiments described herein are only some but not all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, any other embodiments obtained by a person skilled in the art without creative efforts belong to the scope of the present disclosure.

In one embodiment of the present disclosure, a temperature control method for an energy storage battery compartment is provided to improve the overall gain of the energy storage system.

As shown in FIG. 1 , the temperature control method for an energy storage battery compartment includes the following steps S101 to S103.

In step S101, an energy storage calculation model representing a relationship between a lifecycle characteristic parameter of an energy storage system in which an energy storage battery compartment is located and a temperature of a cell of an energy storage battery in the energy storage battery compartment according to a battery decay rule is generated. It consists of

The battery decay rule may be a rule corresponding to the decay characteristics of the battery itself.

The lifetime characteristic parameter of an energy storage system is the total benefit of the energy storage battery compartment over its lifetime or the total on-grid electricity provided by the energy storage battery compartment over its lifetime.

As shown in FIG. 2, according to the battery decay rule, the process of constructing an energy storage calculation model representing the relationship between the life characteristic parameters of the energy storage system and the temperature of the cells of the energy storage battery in the energy storage battery compartment is as follows: It includes steps S201 to S203.

In step S201, a battery operating function representing a relationship between the temperature of a cell, a preset operating life of a power station, and a battery capacity retention rate is constructed according to a battery decay rule.

The battery operating function is expressed as:

Here, T1 represents the temperature of the cell, n represents the preset operating life of the power station, and r represents the battery capacity retention rate.

If the lifetime characteristic parameter of the energy storage system is the total on-grid electricity provided by the energy storage battery compartments during the lifetime, after step S201 is performed, the total on-grid power provided by the energy storage battery compartments during the lifetime is It can be calculated according to the following formula;

where C represents the installed capacity of the energy storage system, Q ₁ represents the power consumption of the energy storage system, k ₁ represents the charging efficiency of the energy storage system, m represents the equivalent operating days, and r represents the battery capacity Lee represents the tension rate; Then, an energy storage computational model representing the relationship between the temperature of the cell and the total on-grid power provided by the energy storage battery compartment over its lifetime within the power station's preset operational age X is calculated as follows: the battery operating function and Based on the above formula for calculating the total on-grid power provided by the energy storage battery compartment over its lifetime, it can be determined:

Steps S202 and S203 shown in FIG. 2 are performed when the lifetime characteristic parameter of the energy storage system is the total gain of the energy storage battery compartment over the lifetime.

In step S202, the function for calculating the annual gain of the energy storage battery compartment is the installed capacity of the energy storage system, power consumption of the energy storage system, equivalent operating days, charging efficiency of the energy storage system, discharging efficiency of the energy storage system, Based on the battery capacity retention rate and the gain per unit of on-grid electricity provided by the energy storage system.

The function for calculating the annual gain of the energy storage battery compartment is expressed as:

where C represents the installed capacity of the energy storage system, r represents the battery capacity retention rate, k ₁ represents the charging efficiency of the energy storage system, Q ₁ represents the power consumption of the energy storage system, and k ₂ represents denotes the discharge efficiency of the energy storage system, m denotes the equivalent operating days, and I ₁ denotes the gain per unit of on-grid electricity provided by the energy storage system.

In practice, the gain I ₁ per unit of on-grid electricity provided by the energy storage system can be obtained from the unit charge of on-grid electricity.

Power consumption Q ₁ of the energy storage system refers to the power consumed by the system itself in which the energy storage battery compartment is located when the energy storage system is discharging. Specifically, when the energy storage system is discharging, power consumed by the temperature regulating device and other self-consuming devices in the system is provided by the energy storage system itself. Thus, the power consumption Q ₁ of the energy storage system can be determined based on the historical power consumption of the system in which the energy storage battery compartment is located.

In step S203, an energy storage calculation model of the energy storage battery compartment within a preset operating age is determined based on the battery operating function and the function for calculating the annual gain.

In the case where the preset operating age of the power station is set as 10, the energy storage calculation model is expressed as follows:

Here, I ₃ represents the total gain of the energy storage battery compartment over its lifetime.

The relationship between the overall gain I ₃ of the energy storage battery compartment during the lifetime and the temperature T ₁ of the cell can be obtained based on the relationships between the parameters of the energy storage calculation model and the function for calculating the annual gain and the battery operating function described above. can

Therefore, the allowable temperature range of the cell is inferred from the total gain of the energy storage battery compartment over its lifetime or the total on-grid power provided by the energy storage battery compartment over its lifetime at a higher level, i.e. by performing step S102. It can be.

In step S102, an allowable temperature range of the cell is determined based on the energy storage calculation model when life characteristic parameters of the energy storage system meet the requirements.

If the lifetime characteristic parameter of the energy storage system in the configured energy storage calculation model is the total gain of the energy storage battery compartment during the lifetime, the total gain of the energy storage battery compartment during the lifetime greater than the preset gain is the total gain of the energy storage battery compartment during the lifetime. The range of temperatures of the cell that can be obtained from all total gains and then corresponds to the obtained total gain of the energy storage battery compartment for a lifetime greater than the preset gain can be used as the cell's acceptable temperature range. Obviously, all total gains of the energy storage battery compartment over lifetime can be sorted in descending order or ascending order, either the first q overall gains of the energy storage battery compartment over lifetime in descending order or the last q total gains of the energy storage battery compartment over lifetime in ascending order. A gain is obtained, and then the range of temperatures of the cell corresponding to the obtained q total gains of the energy storage battery compartment over its lifetime may be used as the allowable temperature range of the cell, where q is a positive integer.

The preset gain may be determined based on the application environment and user selection in the present disclosure, but is not limited thereto. Only preset gains are required to be good gains in the system. Similarly, the value of q can also be determined based on the application environment and user selection, and only q gains obtained are required to be good gains in the system.

In step S103, based on the allowable temperature range of the cells, operation of a temperature regulating device in the energy storage battery compartment is controlled to implement temperature regulation for the energy storage battery compartment.

The temperature regulating device of the energy storage battery compartment may be an air conditioner, fan or other devices having a temperature regulating function. It is not limited to a specific type of temperature regulating device in the present disclosure, which falls within the protection scope of the present disclosure.

In practice, based on the allowable temperature range of the cell and the preset allowable range of the ambient temperature of the energy storage system, the operation of the temperature regulating device may be controlled to implement temperature regulation for the energy storage battery compartment.

A preset allowable range of ambient temperature of the energy storage system may be determined based on temperature requirements in warranty and temperature ranges of operating other electrical devices other than cells of the energy storage battery in the energy storage battery compartment.

The preset allowable range of ambient temperature of the energy storage system when the energy storage battery is in an operating state is different from the preset allowable range of ambient temperature of the energy storage system when the energy storage battery is in a standby state. That is, the preset allowable range of the ambient temperature of the energy storage system is the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in an operating state and the temperature of the energy storage system when the energy storage battery is in a standby state. A preset acceptable range of ambient temperatures may be included.

Assuming that the temperature resistances of the main electrical devices in the energy storage battery compartment are as shown in Table 1, the ambient temperature range suitable for operation of the battery combiner cabinet is [0 ° C, 40 ° C], and the battery According to the requirements in the warranty of , the ambient temperature range of the battery in the operating state is [18 ° C, 28 ° C], and the ambient temperature range of the battery in the standby state is [5 ° C, 28 ° C]. Thus, the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in operation is [18°C, 28°C] by crossing the temperature ranges [0°C, 40°C] and [18°C, 28°C]. °C], and the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in a standby state is determined by crossing the temperature ranges [0 °C, 40 °C] and [5 °C, 28 °C] to [ 5°C, 28°C].

Temperature resistances of key electrical devices in the energy storage battery compartment device name factory in action
temperature range in standby
temperature range battery Samsung 18~28℃ 5~28℃ energy management system
(EMS) Sungrow -30~60℃ -40~85℃ battery combiner
Cabinet (BCP) Sungrow 0~40℃ \ Fire protection system (including control cabinet)
(FFS) ZhengTianQi 0~50℃ \ Heat ventilation and air conditioner (HVAC) GaiDing -35~50℃ \ industrial control computer DongTian -40~70℃ \ monitor Hikvision -30~60℃ \ distribution box (including cables) XuJi -15~180℃ \

A process for controlling the operation of a temperature regulating device to implement temperature regulation for an energy storage battery compartment based on an allowable temperature range of a cell and a preset acceptable range of ambient temperature of an energy storage system, as shown in FIG. 3 . includes the following steps S301 to S305.

In step S301, the current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment are obtained.

Practically, the current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment can be obtained by detecting the temperature of the cell and the temperature of the energy storage battery compartment in real time.

The current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment may be obtained in different ways according to existing technology. The manner in which the temperature is obtained is not limited in the present disclosure, which falls within the protection scope of the present disclosure.

In step S302, the current temperature T ₁ of the cell is compared with the allowable temperature range [T _1-1 , T _1-q ] of the cell, and the current temperature T ₂ of the energy storage battery compartment and the ambient temperature of the energy storage system are compared in advance. Compare the set allowable range.

The current temperature T ₁ of the cell is greater than the upper limit of the allowable temperature range T _1-q of the cell or the current temperature T ₂ of the energy storage battery compartment is greater than the upper limit of the preset allowable range of the ambient temperature of the energy storage system. , then proceeds to step S303. The current temperature T ₁ of the cell is less than the lower limit of the allowable temperature range of the cell T _1-1 or the current temperature T ₂ of the energy storage battery compartment is less than the lower limit of the preset allowable range of the ambient temperature of the energy storage system. , then proceeds to step S304. The current temperature T ₁ of the cell is within the allowable temperature range of the cell [T _1-1 , T _1-q ] and the current temperature T ₂ of the energy storage battery compartment is within the preset acceptable range of the ambient temperature of the energy storage system. In this case, it then proceeds to step S305.

In step S303, the temperature regulating device is controlled to start cooling.

In step S304, the temperature regulating device is controlled to start heating.

In step S305, the temperature regulating device is controlled to be in a standby state.

Therefore, through the above process, dual closed-loop control of the operation of the temperature regulating device based on the allowable temperature range of the cell and the preset allowable range of the ambient temperature of the energy storage system is achieved. can be achieved

In practice, the preset allowable range of the ambient temperature of the energy storage system is the preset allowable range of ambient temperature of the energy storage system [T _2a , T _2b ] when the energy storage battery is in operation and the energy storage battery is in standby. The energy storage battery compartment includes a preset allowable range [T _2c , T _2d ] of the ambient temperature of the energy storage system when in the state and, when the temperature regulating device is an air conditioner, based on the allowable temperature range of the cell. The specific process of step S103 in which the operation of the temperature regulating device of the energy storage battery compartment is controlled to implement temperature regulating for the can be shown in FIG. 4 .

Referring to FIG. 4 , before detecting the current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment, the temperature control method may further include determining whether the energy storage battery is in an operating state. . A step of detecting the current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment is performed when the energy storage battery is in an operating state. In practice, the step of determining whether the energy storage battery is in an operational state simply needs to be performed prior to step S202.

Prior to determining whether the energy storage battery is in an operating state, the temperature control method may further include determining whether the energy storage battery has failed. If the energy storage battery fails, then the status of the energy storage battery will be detected; If the energy storage battery is not failing, then determining whether the energy storage battery is in an operational state is performed.

After controlling the temperature regulating device to start cooling, to start heating, or to be in a standby state, it returns to detecting the current temperature T ₁ of the cell and the current temperature T ₂ of the energy storage battery compartment.

In this embodiment, first, according to the battery decay rule, an energy storage calculation model representing a relationship between a life characteristic parameter of an energy storage system and the temperature of a cell of an energy storage battery in an energy storage battery compartment is constructed, so that the temperature of the cell and a gain of the energy storage system; Then, based on the energy storage calculation model, an allowable temperature range of the cell is determined when life characteristic parameters of the energy storage system meet the requirements, so that the temperature of the cell is controlled to be within the allowable range. allows the gain of the energy storage system to be maintained at a high level when Finally, based on the allowable temperature range of the cell, control the operation of the temperature regulating device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment, so that the temperature of the cell is within the allowable range. When tuned, it guarantees the overall gain of the energy storage system at a high level, which has an improved gain of the energy storage system over existing technologies.

Additionally, this solution considers a temperature range suitable for operation of other electrical devices except for cells in the energy storage battery compartment to accurately set the operating parameters of the temperature regulating device, so that the cells and related supporting devices are kept within normal temperature ranges. operation, thereby improving safety and economy in the operation of the system and avoiding damage due to overheating of devices in the energy storage battery compartment.

In another embodiment of the present disclosure, as shown in FIG. 5 , controlling operation of a temperature regulating device in an energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on an acceptable temperature range of a cell. After step S103 of doing, the temperature control method may further include the following steps S401 to S403.

In step S401, it is determined whether the power to be output by the power conversion system (PCS) is greater than the actual charge-discharge power of the energy storage battery at a previous time when the energy storage battery is in an operating state.

In practice, the operating state of an energy storage battery includes a charging state and a discharging state.

If the system in which the energy storage battery is placed is a photovoltaic energy storage system, the power to be output by the power conversion system when the energy storage battery is in a charged state is determined based on the predicted photovoltaic power, and the energy storage battery The power to be output by the power conversion system when in the discharge state is determined based on the predicted load power.

If the power output by the power conversion system is greater than the actual charge-discharge power of the energy storage battery in the previous time, processing proceeds to step S402; If the power output by the power conversion system is smaller than the actual charge-discharge power of the energy storage battery in the previous time, the process proceeds to step S403.

In step S402, the temperature regulating device is controlled to start cooling.

In step S403, the temperature regulating device is controlled to start heating.

In this embodiment, based on the dual closed-loop control of the temperature regulating device, the operation of the temperature regulating device is controlled based on the power to be output by the power conversion system, that is, the dual closed-loop control has the highest priority. is set to have Thus, after ensuring that the operating parameters of the temperature regulating device can be set to meet the temperature of the cell within the allowable temperature range of the cell and that the optimal gain can be maintained, the operating parameters of the temperature regulating device are controlled by the power conversion system. adjusted again based on the power to be output, so that the operating parameters of the temperature regulating device will match the current environment of the energy storage battery compartment much better, thereby ensuring normal operation of the electrical devices in the energy storage battery compartment. do.

According to another embodiment of the present disclosure, operation of a temperature regulating device in an energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on an acceptable temperature range of the cells, as shown in FIG. 6 . After the controlling step S103, the temperature control method may further include the following steps S501 to S503.

In step S501, whether the difference between the preset charge-discharge time of the energy storage system and the current time is greater than the reserved reaction time period of the temperature regulating device when the state of the energy storage battery is switched from the standby state to the operating state. is determined

Switching the energy storage battery from a standby state to an operating state can include switching the energy storage battery from a standby state to a discharged state and switching the energy storage battery from a standby state to a charged state.

The preset charge-discharge time of the energy storage system is a time instance at which the energy storage system starts charging/discharging. The preset charge/discharge time of the energy storage system is determined based on the current temperature of the cell and the difference between internal and external temperatures of the energy storage battery compartment. The preset charge-discharge time of the energy storage system on different days may be different.

For example, the preset charge-discharge time of the energy storage system may be configured to start charging at 10:00 and discharging at 16:00. The charge-discharge time of the energy storage system can also be set to other values, which are not limited in the present disclosure and are within the protection scope of the present disclosure.

The current time refers to the time instance at which the energy storage battery is switched from a standby state to an operating state. The reserved response time period of the temperature regulating device is a preset reserved time period during which the temperature regulating device will respond to a control command.

If the difference between the preset charge-discharge time of the energy storage system and the current time is equal to or less than the reserved response time period of the temperature regulating device, the process proceeds to step S502; If the difference between the preset charge-discharge time of the energy storage system and the current time is greater than the reserved reaction time period of the temperature regulating device, the process proceeds to step S503.

For example, the preset charge-discharge time of the energy storage system is configured to start charging at 10:00 and start discharging at 16:00. If the current time is 16:30 and the reserved reaction time period is configured as 50 minutes, then the difference between the current time and the preset charge-discharge time of the energy storage system is smaller than the reserved reaction time period. If the current time is 17:30, the difference between the preset charge-discharge time of the energy storage system and the current time is greater than the reserved reaction time period.

In step S502, the temperature regulating device is controlled to start cooling or heating based on a relationship between a current temperature of the energy storage battery compartment and a preset allowable range of ambient temperature of the energy storage system.

The temperature regulating device is controlled to start cooling when the current temperature of the energy storage battery compartment is greater than the upper limit of the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in an operating state. The temperature regulating device is controlled to start heating if a current temperature of the energy storage battery compartment when the energy storage battery is in operation is less than a lower limit of a preset allowable range of an ambient temperature of the energy storage system.

The temperature regulating device is controlled to start cooling when the current temperature of the energy storage battery compartment is greater than the upper limit of the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in a standby state. The temperature regulating device is controlled to start heating when the current temperature of the energy storage battery compartment is less than the lower limit of the preset allowable range of the ambient temperature of the energy storage system when the energy storage battery is in a standby state.

In step S503, the temperature regulating device is controlled to be in its original state.

In this embodiment, based on the performance of the dual closed-loop control, a reaction time period is reserved for the temperature regulation device to respond to a control command for the energy storage battery switching between different states, and thus, the temperature regulation device's It ensures reliable switching, improves accuracy in temperature control of the energy storage battery compartment, and avoids temperature runaway in the energy storage battery compartment.

Based on the above temperature control method for an energy storage battery compartment, a discharge control method for an energy storage system is also provided in another embodiment of the present disclosure. A discharge control method for an energy storage system, as shown in FIG. 7 , may include steps S101 and S102 of the temperature control method in the above embodiments, and may also include an energy storage system based on an energy storage calculation model. The following steps S601 to S603 may be included after step S102 of determining the allowable temperature range of the cell when the lifetime characteristic parameter of satisfies the requirements.

In step S601, a discharge calculation model representing a relationship between discharge power of the energy storage system and discharge characteristic parameters of the energy storage system based on the allowable temperature range of the cell is constructed.

In practice, the discharge characteristic parameter of the energy storage system may be the total amount of on-grid power provided by the energy storage system during its lifetime or the total discharge gain of the energy storage system over its lifetime.

Discharge calculation representing the relationship between the discharge power of the energy storage system and the discharge characteristic parameter of the energy storage system based on the allowable temperature range of the cell, when the discharge characteristic parameter of the energy storage system is the total discharge gain of the energy storage system during its lifetime. The specific process of step S601 in which the model is constructed may include the following steps S701 and S702, as shown in FIG. 8 .

In step S701, a discharge representing a relationship between discharge power of the energy storage system, discharge time period of the energy storage system, installed capacity of the energy storage system, battery capacity retention rate, charging efficiency of the energy storage system, and discharging efficiency of the energy storage system. Construct a power simulation function, construct a power consumption function of the energy storage system representing the relationship between the discharge power of the energy storage system and the consumed power of self-consuming devices of the energy storage system, and configure the discharge power of the energy storage system, the battery discharge Construct the discharge efficiency function of the energy storage system, which represents the relationship between efficiency, line loss, efficiency of the power conversion system and efficiency of the transformer.

Practically, firstly, based on the installed capacity of the energy storage system, the battery capacity retention rate, the charging efficiency of the energy storage system and the discharging efficiency of the energy storage system, the discharge power of the energy storage system for the discharging time period of the energy storage system Considering the influence of , a discharge power simulation function is constructed.

The discharge power simulation function is expressed as:

Here, P ₅ represents the discharge power of the energy storage system, t ₄ represents the discharge time period of the energy storage system, C represents the installed capacity of the energy storage system, r represents the battery capacity retention rate, k ₁ denotes the charging efficiency of the energy storage system, k ₂ denotes the discharging efficiency of the energy storage system, and Q ₁ denotes the power consumption of self-consuming devices of the energy storage system.

Then, the different heat dissipation and temperature regulating devices of the cells of the battery versus the power consumption of self-consuming devices in the energy storage system under different discharge powers of the energy storage system and the different powers of other power-consuming devices of the energy storage system. The power consumption function of the energy storage system is constructed considering the influence of

The power consumption function of the energy storage system is expressed as:

Here, P ₆ represents the consumed power of self-consuming devices in the energy storage system.

Then, the influence of different discharge powers of the energy storage system on the discharge efficiency of the energy storage system is considered. While the energy storage system is discharging, since the energy from the battery is mainly provided to the grid through the line, power conversion system and transformer, the discharge efficiency function of the energy storage system is the battery discharge efficiency to the discharge efficiency of the energy storage system, It is obtained by considering the effects of line loss, efficiency of the power conversion system and efficiency of the transformer.

The discharge efficiency function of an energy storage system is expressed as:

k ₂ represents the discharge efficiency of the energy storage system, k _2a represents the battery discharge efficiency, k _2b represents the line loss, k _2c represents the efficiency of the power conversion system, and k _2d represents the efficiency of the transformer.

In step 702, a discharge calculation model is obtained based on the discharge power simulation function, the power consumption function of the energy storage system, the discharge efficiency function of the energy storage system, and the on-grid electricity rate.

When I ₄ represents the on-grid electricity rate, the discharge calculation model is expressed as:

Here, I ₅ represents the discharge gain of the energy storage system.

In step S602, the discharge power of the energy storage system is determined based on the discharge calculation model.

In practice, the discharge power of the energy storage system corresponding to the optimum gain in the discharge calculation model can be used as the determined discharge power of the energy storage system.

A discharge power of the energy storage system corresponding to another gain in the discharge calculation model may also be used as the determined discharge power of the energy storage system.

In step S603, the energy storage battery is controlled to discharge at the discharge power of the energy storage system within a preset discharge time period.

Practically, the preset discharge time period can be configured for every day, and within the preset discharge time period, the discharge power of the energy storage system is calculated and updated every day. Also, in the discharge control method for the energy storage system, the preset discharge time period of the energy storage battery can be dynamically adjusted and is not limited by the discharge start time (16:00) of the energy storage system.

In this embodiment, the discharge power of the energy storage system is first determined by the configured discharge calculation model, and then the energy storage battery is controlled to discharge at the discharge power of the energy storage system within a preset discharge time period. That is, in the present solution, the discharge power of the energy storage battery of the energy storage system is determined by a discharge calculation model constructed based on the allowable temperature range of the cell, and the discharge when the temperature regulating device is operating at low power consumption. power, and thus a higher discharge gain can be obtained by controlling the energy storage battery to discharge at the discharge power of the energy storage system. In addition, the influence of the discharge characteristic parameters of the energy storage system (eg, the discharge time period of the energy storage system and the power consumption of self-consuming devices in the energy storage system) on the discharge calculation model can be used to determine the discharge calculation model in this solution. Sufficient consideration is given to the configuration, thereby elaborate the control process of the discharge of the energy storage battery.

It should be noted that discharge control solutions exist for photovoltaic energy storage systems according to existing technologies. A photovoltaic energy storage system is built after constructing an investment benefit calculation model of the energy storage system in consideration of electricity rates, costs, and power generation parameters. The investment return calculation model of photovoltaic energy storage system is mainly used in the project development phase to provide a basis for economic evaluation and capacity allocation. However, the investment gain calculation model is a gain model used in the project development stage and established on the basis of initial investment, and does not consider the problem of electricity absorption of the energy storage system in the project test stage, so that in the energy management system The discharge process of can not be elaborated. In the present disclosure, the energy storage calculation model in the discharge control method for the energy storage system is a gain model used in the project test phase or project operation phase, and the discharge time period of the energy storage system for the discharge gain and the energy storage system The influence of the power consumption of the self-consuming device is fully considered in constructing the discharge calculation model, thus solving the shortcoming of solutions in the existing art. In addition, through the discharge control method of the energy storage system according to the present disclosure, to obtain an optimal result, the discharge calculation model is a discharge time period of the energy storage system and power consumption of a self-consuming device (eg, an air conditioner). It can be reconstructed by comprehensively considering factors such as

As shown in FIG. 9 , in another embodiment of the present disclosure an energy storage application system is provided. The system includes: a controller 102 , a power conversion system (PCS) 103 and an independent energy storage battery compartment 101 .

The energy storage connection terminals of the energy storage battery compartment 101 are connected through the PCS 103 to a transformer located at the grid-connection point.

The controller 102 performs a temperature control method for an energy storage battery compartment according to any of the embodiments described above and/or an energy storage system according to any of the embodiments described above. It is configured to perform a discharge control method for. [

In practice, as shown in FIG. 10 , the controller 102 may be an energy management system (EMS) disposed in the energy storage battery compartment. The controller 102 may also be, but is not limited to, an independent controller disposed within the energy storage battery compartment or even outside the energy storage battery compartment.

As shown in FIG. 10 , the energy storage battery compartment includes: an energy storage module (rack in FIG. 10 ), a battery combiner cabinet (BCP), a battery management system (BMS), a fire fighting system (FFS), It may further include an air conditioner system (HVAC) and environmental monitor (THU).

The rack is connected to the energy storage connection terminal inside the energy storage battery compartment through the BCP. The energy storage connection terminal outside the energy storage battery compartment is connected to the DC side of the PCS. The AC side of the P'CS is connected to the power grid through a transformer placed at the grid-connection point.

The BMS is connected to the rack by communication.

The EMS is configured to obtain electricity from the power grid through a transformer and is communicatively connected to FFS, HVAC, THU, BMS and PCS, respectively.

A rack includes a number of battery clusters connected in parallel.

Each of the plurality of battery clusters, through the cluster-level management unit of the BMS (1# rack BMS, 2# rack BMS, 3# rack BMS, 4# rack BMS shown in FIG. 11), through the CAN BUS system- It is connected to the level management unit SYS BMS.

The system-level management unit SYS in the BMS The BMS communicates with the EMS via the Modbus TCP/IP protocol.

As shown in FIG. 11, EMS is connected by communication to FFS through a protocol converter for converting Modbus TCP/IP protocol to I/O protocol, and EMS is a protocol for converting Modbus TCP/IP protocol to RS485 protocol Communication is connected to HVAC and THU through the converter, and EMS is connected to PCS through Modbus TCP/IP protocol.

In practice, the EMS may obtain the current temperature of the energy storage battery compartment and the current temperature of the cell through the BMS, and the preset temperature control including the temperature control method for the energy storage battery compartment provided in the above embodiments. Depending on the logic, control commands can be sent to HVAC, FFS, Rack and PCS.

It should be noted that since the EMS is directly connected to the PCS, HVAC, FFS and BMS, the communication rate and accuracy can be improved, facilitating accurate control of the temperature in the energy storage battery compartment by the EMS. Also, the time for the PCS, HVAC, FFS and BMS to respond to control commands from the EMS can be reduced, ensuring that the EMS can respond in a timely manner after recognizing a system failure.

Indeed, in one embodiment, the energy storage application system includes a new energy generation system.

The new energy generation system includes at least one of a photovoltaic power generation system, a wind power generation system, and a diesel power generation system.

It should be noted that the principle and related description of the controller performing the temperature control method for the energy storage battery compartment may be referred to the embodiments corresponding to FIGS. 1 to 6 in the present disclosure, and are not repeated here.

Similarly, the principles and related descriptions of the controller performing the discharge control method for the energy storage system may be referred to the embodiments corresponding to FIGS. 7 and 8 in the present disclosure, and are not repeated herein.

Features described in the embodiments of the present disclosure may be interchanged with each other or combined with each other, each of which highlights differences from other embodiments, and may be the same or similar between the embodiments. Parts may be referenced with respect to each other. Since the system or system embodiments are similar to the method embodiments, the description thereof is relatively simple, and reference may be made to the description of the method embodiments to relevant parts. The system or system embodiments described above are schematic only. Units described as separate components may or may not be physically separate, and components displayed as one unit may or may not be physical units, i.e., may be placed in the same location or Or it can be distributed over multiple network units. Some or all of the modules may be selected as desired to implement the objectives of the embodiments. Those skilled in the art can understand and implement these embodiments without any creative work.

Units and steps in each method described in connection with the embodiments presented herein may be implemented by electronic hardware, computer software, or a combination thereof, which is common knowledge in the art to which the present invention belongs. may also be known to the person. To clearly illustrate the interchangeability of hardware and software, the steps and configurations of each embodiment have been described generally in light of functions in the above specification. Whether a function is executed in a hardware manner or in a software manner depends on the specific application of the technical solution and design constraints. Those skilled in the art may use different methods for each particular application to implement the described functionality, and this should not be considered as departing from the scope of the present disclosure.

According to the above description of the presented embodiments, a person skilled in the art can implement or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments presented herein, but is to be accorded the widest scope in accordance with the principles and novel features presented herein.

Relational terms, such as “first”, “second”, etc., refer only to one entity or operation to another rather than to indicate that there need or exists an actual relationship or order between the entities or operations. It should also be noted that it is used herein to distinguish from an entity or action. Also, the terms “include”, “comprise” or any other variations are intended to be non-exclusive. Therefore, a process, method, article or device that includes a number of elements includes those elements as well as other elements not listed, or also includes elements unique to such process, method, article, or device. . In the absence of further limitations, elements defined by the phrase "comprising (including) a/an..." may be present in a process, method, product or device containing such elements and other similar elements. do not rule out

Claims (16)

A temperature control method for an energy storage battery compartment comprising:
constructing an energy storage calculation model representing a relationship between a lifetime characteristic parameter of an energy storage system in which an energy storage battery compartment is located and a temperature of a cell of an energy storage battery in the energy storage battery compartment, according to a battery decay rule;
determining, based on the energy storage calculation model, an allowable temperature range of the cell when the lifetime characteristic parameter of the energy storage system meets a requirement; and
based on the allowable temperature range of the cell, controlling operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment;
Based on the allowable temperature range of the cell, controlling the operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment comprises:
Controlling the operation of the temperature regulating device to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell and the preset allowable range of the environmental temperature of the energy storage system. including steps,
temperature control method. According to claim 1,
Controlling the operation of the temperature regulating device to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell and the preset allowable range of the ambient temperature of the energy storage system comprises:
obtaining a current temperature of the cell and a current temperature of the energy storage battery compartment;
comparing the current temperature of the cell with an allowable temperature range of the cell, and comparing the current temperature of the energy storage battery compartment with a preset allowable range of ambient temperature of the energy storage system;
Cooling ( controlling the temperature regulating device to start cooling;
When the current temperature of the cell is less than the lower limit of the allowable temperature range of the cell or the current temperature of the energy storage battery compartment is less than the lower limit of the preset allowable range of the ambient temperature of the energy storage system controlling the temperature adjusting device to start heating; and
to be in a standby state when the current temperature of the cell is within the allowable temperature range of the cell and the current temperature of the energy storage battery compartment is within the preset allowable range of the ambient temperature of the energy storage system. Including controlling the temperature adjustment device,
temperature control method. According to claim 2,
A preset allowable range of ambient temperature of the energy storage system when the energy storage battery is in an operating state is a preset allowable range of ambient temperature of the energy storage system when the energy storage battery is in a standby state and different;
Before the step of comparing the current temperature of the cell with the allowable temperature range of the cell and comparing the current temperature of the energy storage battery compartment with a preset allowable range of the ambient temperature of the energy storage system, the temperature control method silver,
further comprising determining a state of the energy storage battery;
Comparing the current temperature of the energy storage battery compartment with a preset allowable range of ambient temperature of the energy storage system,
comparing the current temperature of the energy storage battery compartment with the upper and lower limits of a preset allowable range of the ambient temperature of the energy storage system under a corresponding condition of the energy storage battery.
temperature control method. According to claim 2,
After controlling the operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell, the temperature control method comprises:
determining whether the power to be output by a power conversion system is greater than the actual charge-discharge power of the energy storage battery at a previous time when the energy storage battery is in an operating state;
controlling the temperature regulating device to start cooling when the power to be output is greater than the actual charge-discharge power of the energy storage battery at a previous time; and
controlling the temperature regulating device to start heating when the power to be output is less than the actual charge-discharge power of the energy storage battery at a previous time;
temperature control method. According to claim 2,
After controlling the operation of a temperature regulation device in the energy storage battery compartment to implement temperature regulation for the energy storage battery compartment based on the allowable temperature range of the cell, the temperature control method comprises:
Whether a difference between a preset charge-discharge time of the energy storage system and a current time is greater than a reserved reaction time period of the temperature regulating device when the state of the energy storage battery is switched from a standby state to an operating state; deciding;
When the difference between the preset charge-discharge time and the current time of the energy storage system is equal to or less than the reserved reaction time period, the current temperature of the energy storage battery compartment and the energy controlling the temperature regulating device to start cooling or heating based on a relationship between preset allowable ranges of ambient temperature of the storage system; and
Further comprising controlling the temperature regulating device to maintain an original state when a difference between a preset charge-discharge time and a current time of the energy storage system is greater than the reserved reaction time period.
temperature control method. According to any one of claims 1 to 5,
wherein the lifetime characteristic parameter of the energy storage system is the total benefits of the energy storage battery compartment during its lifetime or the total on-grid electricity provided by the energy storage battery compartment during its lifetime.
temperature control method. According to claim 6,
When the life characteristic parameter of the energy storage system is the total gain of the energy storage battery compartment during lifetime, according to the battery decay rule, the life characteristic parameter of the energy storage system and the energy storage battery in the energy storage battery compartment The step of constructing an energy storage calculation model representing the relationship between the temperatures of the cell,
constructing a battery operating function representing a relationship between a temperature of the cell, preset operating years of a power station, and a battery capacity retention rate according to the battery decay rule;
installed capacity of the energy storage system, power consumption of the energy storage system, equivalent operating days, charging efficiency of the energy storage system, discharging efficiency of the energy storage system, the battery capacity retention rate and the energy constructing a function to calculate an annual benefit of the energy storage battery compartment based on the per unit gain of on-grid electricity provided by the storage system; and
determining an energy storage calculation model of the energy storage battery compartment within the preset operating age based on the battery operating function and the function for calculating the annual gain;
temperature control method. As a discharge control method for an energy storage system,
a temperature control method for the energy storage battery compartment according to claim 1;
After the step of determining the allowable temperature range of the cell based on the energy storage calculation model when the lifespan characteristic parameter of the energy storage system meets the requirements, the discharge control method comprises:
constructing a discharge calculation model representing a relationship between a discharge power of the energy storage system and a discharge characteristic parameter of the energy storage system, based on the allowable temperature range of the cell;
determining discharge power of the energy storage system based on the discharge calculation model; and
Further comprising controlling the energy storage battery to discharge with the discharge power of the energy storage system within a preset discharge time period.
Discharge control method. According to claim 8,
Constructing a discharge calculation model representing a relationship between a discharge power of the energy storage system and a discharge characteristic parameter of the energy storage system based on the allowable temperature range of the cell,
Representing the relationship between the discharge power of the energy storage system, the discharge time period of the energy storage system, the installed capacity of the energy storage system, the battery capacity retention rate, the charging efficiency of the energy storage system, and the discharging efficiency of the energy storage system Construct a discharge power simulation function, and construct a power consumption function of the energy storage system representing a relationship between discharge power of the energy storage system and consumed power of a self-consumption device of the energy storage system; configuring a discharge efficiency function of the energy storage system representing a relationship between discharge power, battery discharge efficiency, line loss, efficiency of a power conversion system, and efficiency of a transformer of the energy storage system; and
Acquiring the discharge calculation model based on the discharge power simulation function, the power consumption function of the energy storage system, the discharge efficiency function of the energy storage system, and on-grid electricity rates.
Discharge control method. According to claim 8 or 9,
The discharge characteristic parameter of the energy storage system is a total discharge gain of the energy storage system during its lifetime or a total amount of on-grid electricity provided by the energy storage system during its lifetime.
Discharge control method. As an energy storage application system,
It includes a controller, power conversion system and an independent energy storage battery compartment;
The energy storage connection terminal of the energy storage battery compartment is connected to a transformer disposed at a grid-connection point through the power conversion system;
The controller is configured to perform the temperature control method according to claim 1 and / or configured to perform the discharge control method according to claim 8,
Energy storage application system. According to claim 11,
The controller is an energy management system disposed in the energy storage battery compartment,
Energy storage application system. According to claim 12,
the energy storage battery compartment further includes an energy storage module, a battery combiner cabinet, a battery management system, a fire fighting system, an air conditioner system and an environmental monitor;
The energy storage module is connected to the energy storage connection terminal in the energy storage battery compartment through the battery combiner cabinet;
The battery management system is communicatively connected to the energy storage module,
The energy management system is configured to obtain electricity from a power grid through the transformer, and is communicatively connected to the fire protection system, the air conditioner system, the environmental monitor, the battery management system, and the power conversion system, respectively.
Energy storage application system. According to claim 11,
Further including a new energy power generation system,
Energy storage application system. 15. The method of claim 14,
The new energy generation system includes at least one of a photovoltaic power generation system, a wind power generation system, and a diesel power generation system.
Energy storage application system. delete