CN117913426A - Energy storage system thermal management method and device and electronic equipment - Google Patents

Abstract

The application discloses a thermal management method and device for an energy storage system and electronic equipment, and belongs to the technical field of energy storage systems, wherein the method comprises the following steps: acquiring the temperature value of each single battery in each battery stack, controlling the BMS management mode to be started when the thermal management requirement is met based on the acquired temperature value of each single battery, determining the first temperature parameter of each battery stack and the second temperature parameter of each battery cluster based on the temperature value of each single battery, controlling the air conditioner corresponding to each battery stack to execute a first control strategy based on the first temperature parameter of each battery stack, and controlling the air conditioner corresponding to each battery cluster to execute a second control strategy based on the second temperature parameter of each battery cluster. The BMS uniformly controls the air conditioners corresponding to the whole battery stacks to execute a first control strategy and controls the air conditioners corresponding to the whole battery clusters to execute a second control strategy according to the battery temperature, so that temperature rise among the battery clusters is consistent, current among the battery clusters is consistent, and performance of the whole energy storage power supply system is improved.

Description

Energy storage system thermal management method and device and electronic equipment

Technical Field

The present application relates to the field of energy storage systems, and in particular, to a method and an apparatus for thermal management of an energy storage system, and an electronic device.

Background

With the gradual increase of the clean energy duty ratio, the energy storage plays a vital role on the power generation side, the power grid side and the user side of the power system. Energy storage is the process of storing energy by a medium or device and releasing it when needed. The lithium battery has the advantages of high working voltage, large specific energy, small volume, light weight, low self-discharge rate, higher cycle life and the like, so the lithium battery is widely applied to energy storage batteries.

The temperature has great influence on the capacity, power, safety and other performances of the battery in the energy storage system. In large energy storage system applications where multiple battery clusters are used in parallel, system temperature differential control presents a significant challenge due to the large number of battery clusters (multiple battery packs in series) and battery packs (single battery pack).

The existing mode is that a plurality of air-cooled air conditioners are arranged near each battery cluster in an energy storage system, and the temperature control of the energy storage system is realized based on return air temperature through each air-cooled air conditioner.

However, as the air-cooled air conditioners are mutually independent and respectively adopt different sensors, the air-cooled air conditioners enter different running states because of different acquired data, particularly in the charging and discharging processes of the energy storage batteries, if the temperature rise of the batteries is inconsistent, the temperature difference among the battery clusters is easily caused to be overlarge, so that the current difference among the clusters is increased, at the end of discharging, the temperature rise speed is accelerated, the polarization of the batteries is increased, the heat release rate is accelerated, the inconsistency of the batteries is enhanced, the discharge capacity is seriously influenced, the service life of the battery system is possibly reduced, the performance of the whole energy storage system is influenced, thermal runaway is easily caused when the thermal runaway is serious, and safety accidents are caused.

Disclosure of Invention

The embodiment of the application provides a thermal management method and device for an energy storage system and electronic equipment, which are used for controlling temperature and humidity among battery clusters to be consistent and improving the performance of the whole energy storage power supply system.

In a first aspect, an embodiment of the present application provides a method for thermally managing an energy storage system, where the energy storage system includes at least one stack, a plurality of battery clusters corresponding to each stack, a plurality of air-cooled air conditioners, and a battery management system BMS, and the method includes:

acquiring the temperature value of each single battery in each battery stack;

Based on the obtained temperature values of the single batteries, when the thermal management requirements are met, controlling the BMS management mode to be started;

determining a first temperature parameter of each cell stack and a second temperature parameter of each cell cluster based on the temperature value of each single cell;

Based on the first temperature parameter of each cell stack, controlling the air conditioner corresponding to each cell stack to execute a first control strategy;

and controlling the air conditioner corresponding to each battery cluster to execute a second control strategy based on the second temperature parameter of each battery cluster.

In some embodiments, the first control strategy is to control the air-conditioning refrigeration corresponding to the battery stack to be started or control the air-conditioning heating corresponding to the battery stack to be started, and the second control strategy is to control the air-conditioning refrigeration corresponding to the battery cluster to be closed or control the air-conditioning heating corresponding to the battery cluster to be closed.

In some embodiments, the determining the first temperature parameter of each cell stack and the second temperature parameter of each cell cluster based on the temperature value of each cell includes:

For any cell stack, determining the average temperature of the cell stack according to the average value of the temperature values of the cells in the cell stack and the maximum temperature of the cell stack according to the maximum temperature of each cell in the cell stack;

and aiming at any battery cluster, determining the highest temperature of the battery cluster according to the highest temperature of each single battery in the battery cluster, and determining the lowest temperature of the battery cluster according to the lowest temperature of each single battery in the battery cluster.

In some embodiments, the controlling the air conditioner corresponding to each stack to execute the first control strategy based on the first temperature parameter of each stack includes:

For any battery stack, if the highest temperature of the battery stack is not less than a refrigeration starting temperature threshold value and the average temperature of the battery stack is not less than a first average temperature, controlling the air conditioner corresponding to the battery stack to be refrigerated and started;

And if the highest temperature of the battery stack is not greater than the heating starting temperature threshold value and the average temperature of the battery stack is not greater than the second average temperature, controlling the corresponding air conditioner of the battery stack to be heated and started.

In some embodiments, the controlling the air conditioner corresponding to each battery cluster to execute the second control policy based on the second temperature parameter of each battery cluster includes:

for any battery cluster, if the highest temperature of the battery cluster is not greater than a refrigeration closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be refrigerated and closed;

and if the lowest temperature of the battery cluster is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be heated and closed.

In some embodiments, when controlling the air conditioner corresponding to each battery stack to execute the first control policy or controlling the air conditioner corresponding to each battery cluster to execute the second control policy, the method further includes:

If the control strategy of the same cell stack comprises air conditioner heating start and air conditioner refrigerating start at the same time, controlling the air conditioner refrigerating start corresponding to the cell stack;

If the control strategy of the same battery cluster comprises air conditioner refrigeration on and air conditioner refrigeration off at the same time, controlling the air conditioner refrigeration off corresponding to the battery cluster;

And if the control strategy of the same battery cluster comprises air conditioner heating on and air conditioner heating off, controlling the air conditioner heating off corresponding to the battery cluster.

In some embodiments, monitoring an ambient temperature within a battery compartment of the energy storage system acquired by the temperature and humidity sensor;

If the ambient temperature is lower than a preset low-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop refrigeration;

And if the ambient temperature is higher than a preset high-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop heating.

In some embodiments, further comprising:

And controlling the BMS management mode to stop when the obtained temperature values of the single batteries are determined to not meet the thermal management requirement, wherein the condition that the temperature of the single batteries is not higher than a first preset threshold and the temperature of the single batteries is not lower than a second preset threshold.

In a second aspect, an embodiment of the present application provides a thermal management device for an energy storage system, where the energy storage system includes at least one stack, a plurality of battery clusters corresponding to each stack, a plurality of air-cooled air conditioners, and a battery management system BMS, and the device includes:

The acquisition module is used for acquiring the temperature value of each single battery in each battery stack;

The first determining module is used for controlling the BMS management mode to be started when the thermal management requirement is met based on the acquired temperature values of the single batteries;

The second determining module is used for determining a first temperature parameter of each battery stack and a second temperature parameter of each battery cluster based on the temperature value of each single battery;

the first control module is used for controlling the air conditioner corresponding to each battery stack to execute a first control strategy based on the first temperature parameter of each battery stack;

and the second control module is used for controlling the air conditioner corresponding to each battery cluster to execute a second control strategy based on the second temperature parameter of each battery cluster.

In some embodiments, the first control strategy is to control the air-conditioning refrigeration corresponding to the battery stack to be started or control the air-conditioning heating corresponding to the battery stack to be started, and the second control strategy is to control the air-conditioning refrigeration corresponding to the battery cluster to be closed or control the air-conditioning heating corresponding to the battery cluster to be closed.

In some embodiments, the second determining module is specifically configured to:

For any cell stack, determining the average temperature of the cell stack according to the average value of the temperature values of the cells in the cell stack and the maximum temperature of the cell stack according to the maximum temperature of each cell in the cell stack;

and aiming at any battery cluster, determining the highest temperature of the battery cluster according to the highest temperature of each single battery in the battery cluster, and determining the lowest temperature of the battery cluster according to the lowest temperature of each single battery in the battery cluster.

In some embodiments, the first control module is specifically configured to:

For any battery stack, if the highest temperature of the battery stack is not less than a refrigeration starting temperature threshold value and the average temperature of the battery stack is not less than a first average temperature, controlling the air conditioner corresponding to the battery stack to be refrigerated and started;

And if the highest temperature of the battery stack is not greater than the heating starting temperature threshold value and the average temperature of the battery stack is not greater than the second average temperature, controlling the corresponding air conditioner of the battery stack to be heated and started.

In some embodiments, the second control module is specifically configured to:

for any battery cluster, if the highest temperature of the battery cluster is not greater than a refrigeration closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be refrigerated and closed;

and if the lowest temperature of the battery cluster is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be heated and closed.

In some embodiments, when the first control module controls the air conditioner corresponding to each battery stack to execute the first control policy or the second control module controls the air conditioner corresponding to each battery cluster to execute the second control policy, the method further includes:

The third control module is used for controlling the air conditioner refrigeration on corresponding to the battery stack if the control strategy of the same battery stack simultaneously comprises air conditioner heat on and air conditioner refrigeration on;

If the control strategy of the same battery cluster comprises air conditioner refrigeration on and air conditioner refrigeration off at the same time, controlling the air conditioner refrigeration off corresponding to the battery cluster;

And if the control strategy of the same battery cluster comprises air conditioner heating on and air conditioner heating off, controlling the air conditioner heating off corresponding to the battery cluster.

In some embodiments, further comprising:

The monitoring module is used for monitoring the environmental temperature in the battery compartment of the energy storage system, which is acquired by the temperature and humidity sensor;

If the ambient temperature is lower than a preset low-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop refrigeration;

And if the ambient temperature is higher than a preset high-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop heating.

In some embodiments, the first determining module is further configured to:

And controlling the BMS management mode to stop when the obtained temperature values of the single batteries are determined to not meet the thermal management requirement, wherein the condition that the temperature of the single batteries is not higher than a first preset threshold and the temperature of the single batteries is not lower than a second preset threshold.

In a third aspect, an embodiment of the present application provides an electronic device, including: at least one processor, and a memory communicatively coupled to the at least one processor, wherein:

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the energy storage system thermal management method described above.

In a fourth aspect, embodiments of the present application provide a storage medium, which when executed by a processor of an electronic device is capable of performing the above-described energy storage system thermal management method.

Compared with the prior art, the beneficial effects of the embodiment of the application are at least as follows:

in the embodiment of the application, the temperature value of each single battery in each battery stack is obtained, when the thermal management requirement is met based on the obtained temperature value of each single battery, the BMS management mode is controlled to be started, the first temperature parameter of each battery stack and the second temperature parameter of each battery cluster are determined based on the temperature value of each single battery, the air conditioner corresponding to each battery stack is controlled to execute a first control strategy based on the first temperature parameter of each battery stack, and the air conditioner corresponding to each battery cluster is controlled to execute a second control strategy based on the second temperature parameter of each battery cluster. Like this, confirm when satisfying the thermal management demand, control BMS management mode and open, by BMS according to battery temperature, the air conditioner that the whole battery pile of unified control corresponds carries out first control strategy and the air conditioner that the whole battery cluster of control corresponds carries out the second control strategy to make the temperature rise unanimous between the battery cluster, realize that the electric current is unanimous between the cluster, and then promote whole energy storage power supply system performance.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

fig. 1 is a schematic diagram of arrangement of a battery cluster and an air conditioner in a battery compartment of an energy storage system according to an embodiment of the present application;

FIG. 2 is a flow chart of a thermal management method for an energy storage system according to an embodiment of the present application;

FIG. 3 is a flow chart of a thermal management method for an energy storage system according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a thermal management device of an energy storage system according to an embodiment of the present application;

Fig. 5 is a schematic hardware structure of an electronic device for implementing a thermal management method of an energy storage system according to an embodiment of the present application.

Detailed Description

In order to control the temperature and humidity among the battery clusters to keep consistent and improve the performance of the whole energy storage power supply system, the embodiment of the application provides a heat management method and device of an energy storage system and electronic equipment.

The preferred embodiments of the present application will be described below with reference to the accompanying drawings of the specification, it being understood that the preferred embodiments described herein are for illustration and explanation only, and not for limitation of the present application, and embodiments of the present application and features of the embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description of embodiments of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. In the description of the embodiments of the present application, unless otherwise indicated, "plurality" means two or more. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

With the gradual increase of the clean energy duty ratio, the energy storage plays a vital role on the power generation side, the power grid side and the user side of the power system. Energy storage is the process of storing energy by a medium or device and releasing it when needed. The lithium battery has the advantages of high working voltage, large specific energy, small volume, light weight, low self-discharge rate, higher cycle life and the like, so the lithium battery is widely applied to energy storage batteries.

The temperature has great influence on the capacity, power, safety and other performances of the battery in the energy storage system. In large energy storage system applications where multiple battery clusters are used in parallel, system temperature differential control presents a significant challenge due to the large number of battery clusters (multiple battery packs in series) and battery packs (single battery pack).

The existing mode is that a plurality of air-cooled air conditioners are arranged near each battery cluster in an energy storage system, and the temperature control of the energy storage system is realized based on return air temperature through each air-cooled air conditioner. As shown in fig. 1, fig. 1 is a schematic diagram of arrangement of Battery clusters and air conditioners in a Battery compartment of an energy storage system according to an embodiment of the present application, where the energy storage system includes a Battery system, a Battery management system (Battery MANAGEMENT SYSTEM, BMS) (not shown), a temperature and humidity sensor (not shown), a fire protection system, a power distribution and air conditioners, and the Battery system includes 12 Battery clusters, which are respectively a Battery cluster 1, a Battery cluster 2, a Battery cluster 3, a Battery cluster 4, a Battery cluster 5, a Battery cluster 6, a Battery cluster 7, a Battery cluster 8, a Battery cluster 9, a Battery cluster 10, a Battery cluster 11 and a Battery cluster 12, the air conditioners are 6 air-cooled air conditioners, which are respectively an air conditioner 1, an air conditioner 2, an air conditioner 3, an air conditioner 4, an air conditioner 5 and an air conditioner 6, and the fire protection system includes a composite gas detector, a temperature detector, a smoke detector, an acousto-optic alarm device, a gas release alarm device, an anti-explosion fan and a shutter, a heptafluoropropane or a perfluorinated hexanone device, a water fire protection system, and the like, wherein the air conditioner 1 is an air conditioner corresponding to the Battery cluster 1 and the Battery cluster 2, and is used for adjusting the temperature and the humidity of the Battery cluster 1 and the Battery cluster 2, the air conditioner 2 is an air conditioner corresponding to the Battery cluster 3 and the Battery cluster 4, and is used for adjusting the temperature and the humidity of the Battery cluster 3 and the Battery cluster 4, the air conditioner 3 is an air conditioner corresponding to the Battery cluster 5 and the Battery cluster 6, and is used for adjusting the temperature and the humidity of the Battery cluster 5 and the Battery cluster 6, the air conditioner 4 is an air conditioner corresponding to the Battery cluster 7 and the Battery cluster 8, and is used for adjusting the temperature and the humidity of the Battery cluster 7 and the Battery cluster 8, the air conditioner 5 is an air conditioner corresponding to the Battery cluster 9 and the Battery cluster 10, and the air conditioner 6 is an air conditioner corresponding to the Battery cluster 11 and the Battery cluster 12, and is used for adjusting the temperature and the humidity of the Battery cluster 11 and the Battery cluster 12, the battery clusters 1 to 6 belong to the battery stack 1, and the battery clusters 7 to 12 belong to the battery stack 2, so that the air conditioners 1 to 3 are air conditioners corresponding to the battery stack 1, and the air conditioners 4 to 6 are air conditioners corresponding to the battery stack 2.

Fig. 2 is a flowchart of a method for thermal management of an energy storage system according to an embodiment of the present application, which may be performed by an air conditioner, and the method includes the following steps.

In step 201, for any air conditioner, the return air temperature and humidity detected by the return air inlet temperature and humidity probe of the air conditioner are obtained.

In step 202, the air conditioner is controlled to execute corresponding operation modes according to the return air temperature and humidity, wherein the operation modes comprise refrigeration, heating, dehumidification, humidification and air supply.

In specific implementation, an opening threshold and a closing threshold can be set for the refrigerating, heating, dehumidifying and humidifying operation modes respectively, for example, a refrigerating opening threshold and a refrigerating closing threshold are set for the refrigerating mode, and if the return air temperature is not less than the refrigerating opening temperature threshold, the refrigerating opening of the air conditioner is controlled; if the return air temperature is not greater than the refrigeration closing temperature threshold value, controlling the air conditioner to be refrigerated and closed; setting a heating opening threshold and a heating closing threshold for a heating mode, and controlling the air conditioner to be heated and opened if the return air temperature is not greater than the heating opening temperature threshold; if the return air temperature is not less than the heating closing temperature threshold, controlling the air conditioner to be heated and closed; setting a dehumidification opening threshold and a dehumidification closing threshold for a dehumidification mode, and controlling the air conditioner to be dehumidified and opened if the return air humidity is not less than the dehumidification opening humidity threshold; if the return air humidity is not greater than the dehumidifying closing humidity threshold value, controlling the air conditioner to be dehumidified and closed; if the return air humidity is not greater than the humidification start humidity threshold value, controlling the air conditioner to be humidified and started; setting a humidification opening threshold and a humidification closing threshold for a humidification mode, and controlling the air conditioner to be humidified and closed if the return air humidity is not less than the humidification closing humidity threshold; in addition, when the temperature and humidity of the return air do not meet the conditions, the air conditioner is controlled to enter an air supply mode so as to ensure that the temperature distribution in the cabin is uniform.

However, as the air-cooled air conditioners are mutually independent and respectively adopt different sensors, the air-cooled air conditioners enter different running states because of different acquired data, particularly in the charging and discharging processes of the energy storage batteries, if the temperature rise of the batteries is inconsistent, the temperature difference among the battery clusters is easily caused to be overlarge, so that the current difference among the clusters is increased, at the end of discharging, the temperature rise speed is accelerated, the polarization of the batteries is increased, the heat release rate is accelerated, the inconsistency of the batteries is enhanced, the discharge capacity is seriously influenced, the service life of the battery system is possibly reduced, the performance of the whole energy storage system is influenced, thermal runaway is easily caused when the thermal runaway is serious, and safety accidents are caused.

In view of this, an embodiment of the present application provides a thermal management method for an energy storage system, where a temperature value of each unit cell in each stack is obtained, when it is determined that a thermal management requirement is met based on the obtained temperature value of each unit cell, a BMS management mode is controlled to be turned on, a first temperature parameter of each stack and a second temperature parameter of each battery cluster are determined based on the temperature value of each unit cell, an air conditioner corresponding to each stack is controlled to execute a first control policy based on the first temperature parameter of each stack, and an air conditioner corresponding to each battery cluster is controlled to execute a second control policy based on the second temperature parameter of each battery cluster. Like this, confirm when satisfying the thermal management demand, control BMS management mode and open, by BMS according to battery temperature, the air conditioner that the whole battery pile of unified control corresponds carries out first control strategy and the air conditioner that the whole battery cluster of control corresponds carries out the second control strategy to make the temperature rise unanimous between the battery cluster, realize that the electric current is unanimous between the cluster, and then promote whole energy storage power supply system performance.

It should be noted that, in the embodiments of the present application, an application of the thermal management method of the energy storage system to the application architecture shown in fig. 1 is schematically illustrated.

The thermal management of the energy storage system according to the present application will be described in specific embodiments. Fig. 3 is a flowchart of a thermal management method of an energy storage system according to an embodiment of the present application, where the energy storage system includes at least one stack, a plurality of battery clusters corresponding to each stack, a plurality of air-cooled air conditioners, and a battery management system BMS.

In step 301, a temperature value of each unit cell in each cell stack is obtained.

In practice, the voltage, current, temperature, etc. data of each single battery can be obtained by connecting each single battery to the battery management system BMS. Wherein the battery stack is a whole body formed by connecting a plurality of battery clusters, and the battery clusters are a whole body formed by connecting a plurality of battery packs, and the battery packs usually comprise one or more single batteries.

In step 302, when it is determined that the thermal management requirements are satisfied based on the obtained temperature values of the individual battery cells, the BMS management mode is controlled to be turned on.

In specific implementation, the condition that the thermal management requirement is met may be that the temperature of the single battery is higher than a first preset threshold or the temperature of the single battery is lower than a second preset threshold, when the battery system is in a charge-discharge state or the environmental temperature in summer is higher, the temperature of the single battery is increased, when the temperature of the single battery reaches the first preset temperature threshold, for example, the first preset temperature threshold is 30 ℃, the thermal management requirement is met, or when the temperature of the single battery is reduced to reach the second preset temperature threshold, for example, the second preset temperature threshold is 18 ℃, the thermal management requirement is met, and the BMS management mode can be controlled to be started.

In specific implementation, when it is determined that the thermal management requirement is not met based on the obtained temperature value of each single battery, the BMS management mode is controlled to stop, at this time, because each air conditioner cannot receive the BMS control signal, each air conditioner can automatically enter the air conditioner local management mode, where the thermal management requirement is that the single battery temperature is not higher than a first preset threshold and the single battery temperature is not lower than a second preset threshold, for example, when the battery system is in a static state, i.e. in an uncharged state, the single battery temperature is in a normal temperature range, for example, about 25 ℃, the thermal management requirement is not met, in specific implementation, after entering the air conditioner local management mode, the air conditioner executes a corresponding operation mode according to the return air temperature and humidity detected by the air conditioner return temperature and humidity probe, where the operation mode includes refrigeration, heating, dehumidification, humidification and air supply.

It should be noted that, after the BMS management mode is turned on, the BMS sends a control signal to each air conditioner to instruct the air conditioner to execute the control policy indicated by the BMS, and at this time, if any air conditioner receives the control signal of the BMS, the air conditioner is in any operation mode in the local management mode of the air conditioner, so as to avoid executing the policy conflict, the priority of the BMS management mode may be preset to be higher than that of the local management mode of the air conditioner.

In step 303, a first temperature parameter for each stack and a second temperature parameter for each cluster are determined based on the temperature values of each cell.

In specific implementation, for any cell stack, the average temperature of the cell stack is determined according to the average value of the temperature values of the cells in the cell stack and the maximum temperature of the cell stack is determined according to the maximum temperature of each cell in the cell stack.

For example, as shown in fig. 1, there are two stacks in total, and it is assumed that 10 single cells are in each of the clusters of the stacks 1 and 2, that is, 60 single cells are in each of the stacks 1 and 2, and if the maximum temperature of the 60 single cells of the stack 1 is 30 ℃, the maximum temperature of the 60 single cells of the stack 2 is 29.5 ℃, the maximum temperature of the stack 1 is 30 ℃, the maximum temperature of the stack 2 is 29.5 ℃, and if the average value of the temperature values of the 60 single cells of the stack 1 is 28 ℃, the average temperature of the 60 single cells of the stack 2 is 28.5 ℃, the average temperature of the stack 1 is 28 ℃, and the average temperature of the stack 2 is 28.5 ℃.

For any battery cluster, determining the highest temperature of the battery cluster according to the highest temperature of each single battery in the battery cluster, and determining the lowest temperature of the battery cluster according to the lowest temperature of each single battery in the battery cluster.

Taking the energy storage system battery compartment shown in fig. 1 as an example, there are two battery stacks in total, and each battery stack corresponds to 6 battery clusters, and 10 battery cells in each battery cluster of battery stack 1 and battery stack 2 are respectively, in the battery stack 1, if the temperature of each battery cell of battery cluster 1 is 30 ℃, the temperature of each battery cell of battery cluster 2 is 29.2 ℃, the temperature of each battery cell of battery cluster 2 is 29 ℃, the temperature of each battery cell of battery cluster 2 is 28.5 ℃, the temperature of each battery cell of battery cluster 3 is 29.5 ℃, the temperature of each battery cell of battery cluster 4 is 29.8 ℃, the temperature of each battery cell of battery cluster 4 is 29.5 ℃, the temperature of each battery cell of battery cluster 5 is 29.9 ℃, the temperature of battery cell of battery cluster 6 is 29.7 ℃, the temperature of battery cluster 1 is 30 ℃, the temperature of battery 2 is 29.2 ℃, the temperature of battery 2 is 28.5 ℃, the temperature of battery 3.5 ℃, the temperature of battery cell 2 is 29.5 ℃, and the temperature of battery 4.5 is 29.9 ℃, the temperature of battery 4, and the temperature of battery 4.5 is 29.9 ℃.

Similarly, in the stack 2, if the highest temperature of each unit cell of the battery cluster 7 is 30.2 ℃, the lowest temperature is 29 ℃, the highest temperature of each unit cell of the battery cluster 8 is 29.5 ℃, the lowest temperature of each unit cell of the battery cluster 9 is 29.5 ℃, the highest temperature of each unit cell of the battery cluster 9 is 29.5 ℃, the lowest temperature of each unit cell of the battery cluster 10 is 29.8 ℃, the lowest temperature of each unit cell of the battery cluster 10 is 29.2 ℃, the highest temperature of each unit cell of the battery cluster 11 is 30 ℃, the lowest temperature of each unit cell of the battery cluster 11 is 29.6 ℃, the highest temperature of each unit cell of the battery cluster 12 is 29.8 ℃, the lowest temperature of each unit cell of the battery cluster 12 is 29.5 ℃, the highest temperature of the battery cluster 7 is 30.2 ℃, the lowest temperature of the battery cluster 7 is 29 ℃, the highest temperature of the battery cluster 8 is 29.5 ℃, the lowest temperature of the battery cluster 8 is 28.9 ℃, the highest temperature of the battery cluster 9 is 29.5 ℃, the lowest temperature of the battery cluster 9 is 29.8 ℃, the lowest temperature of the battery cluster 10 is 29.8 ℃, the highest temperature of the battery cluster 10 is 29.2 ℃, the highest temperature of the battery 11, the lowest temperature of the battery 11 is 30.8 ℃, the lowest temperature of the battery 11, and the lowest temperature of the battery cluster 12 is 29.5.

In step 304, based on the first temperature parameter of each stack, the air conditioner corresponding to each stack is controlled to execute a first control strategy.

In specific implementation, the first control strategy is to control the air conditioner refrigeration opening corresponding to the cell stack or control the air conditioner heating opening corresponding to the cell stack.

When the method is implemented, for any cell stack, if the highest temperature of the cell stack is not less than a refrigeration starting temperature threshold value and the average temperature of the cell stack is not less than a first average temperature, controlling the air conditioner corresponding to the cell stack to be started in refrigeration; and if the highest temperature of the battery stack is not greater than the heating starting temperature threshold value and the average temperature of the battery stack is not greater than the second average temperature, controlling the corresponding air conditioner of the battery stack to be heated and started.

Taking the air conditioner corresponding to the cell stack 1 as an example of the air conditioner 1, the air conditioner 2 and the air conditioner 3 as shown in fig. 1, if the highest temperature of the cell stack 1 is not less than the refrigeration starting temperature threshold value and the average temperature of the cell stack 1 is not less than the first average temperature, controlling the air conditioner 1, the air conditioner 2 and the air conditioner 3 corresponding to the cell stack 1 to simultaneously start refrigeration; if the highest temperature of the cell stack 1 is not greater than the heating start temperature threshold and the average temperature of the cell stack 1 is not greater than the second average temperature, controlling the air conditioner 1, the air conditioner 2 and the air conditioner 3 corresponding to the cell stack 1 to start heating at the same time.

Like this, when satisfying the thermal management demand, control whole heap air conditioner by BMS according to battery temperature and unify refrigeration or heat, can realize that the temperature rise is unanimous between each battery cluster, avoid the cluster current difference increase that high difference in temperature caused, can promote whole energy storage power supply system performance.

In step 305, based on the second temperature parameter of each battery cluster, the air conditioner corresponding to each battery cluster is controlled to execute the second control strategy.

In specific implementation, the second control strategy is to control the air conditioner refrigeration corresponding to the battery cluster to be closed or control the air conditioner heating corresponding to the battery cluster to be closed.

When the method is implemented, aiming at any battery cluster, if the highest temperature of the battery cluster is not greater than a refrigeration closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be refrigerated and closed; and if the lowest temperature of the battery cluster is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be heated and closed.

As shown in fig. 1, taking the air conditioner 1 corresponding to the battery cluster 1 as an example, if the highest temperature of the battery cluster 1 is not greater than the refrigeration closing temperature threshold, controlling the air conditioner 1 corresponding to the battery cluster 1 to be in refrigeration closing; and if the lowest temperature of the battery cluster 1 is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster 1 to be heated and closed. Because, in the schematic diagram of the battery compartment of the energy storage system shown in fig. 1, the battery cluster 1 and the battery cluster 2 correspond to the air conditioner 1, when the highest temperature of any one of the battery cluster 1 and the battery cluster 2 is not greater than the cooling shutdown temperature threshold, the air conditioner 1 is controlled to be turned off in a cooling manner, and when the lowest temperature of any one of the battery cluster 1 and the battery cluster 2 is not less than the heating shutdown temperature threshold, the air conditioner 1 is controlled to be turned off in a heating manner.

Therefore, if the temperature of the single battery in any battery cluster meets the threshold value, the BMS controls the corresponding air conditioner to stop refrigerating or heating, so that the condition that the whole stack of air conditioners is always refrigerated or always heated due to one temperature extreme value is avoided, the power consumption of the air conditioners is reduced, and the excessively low or high battery temperature is also avoided.

In practical application, in order to avoid the condition that refrigeration and heating are simultaneously started, the following control strategies can be set:

if the control strategy of the same cell stack comprises air conditioner heating start and air conditioner refrigerating start at the same time, controlling the air conditioner refrigerating start corresponding to the cell stack; if the control strategy of the same battery cluster comprises air conditioner refrigeration on and air conditioner refrigeration off at the same time, controlling the air conditioner refrigeration off corresponding to the battery cluster; and if the control strategy of the same battery cluster comprises air conditioner heating on and air conditioner heating off, controlling the air conditioner heating off corresponding to the battery cluster.

In the specific implementation, besides controlling the air conditioner to execute a corresponding control strategy according to the temperature of the single battery, the environment temperature in the battery compartment of the energy storage system collected by the temperature and humidity sensor can be monitored, if the environment temperature is lower than a preset low-temperature alarm value, the air conditioner corresponding to each battery stack is controlled to stop refrigerating, and if the environment temperature is higher than a preset high-temperature alarm value, the air conditioner corresponding to each battery stack is controlled to stop heating. When the BMS detects the fault of the air conditioning system, the fire alarm and the water immersion sensor alarm, the BMS can also control all air conditioners to stop; when the BMS detects that communication with the air conditioner fails, the BMS can also control the shutdown of the whole energy storage system and alarm.

Therefore, by setting the priority of the air conditioner operation mode and the thermal management strategy of the energy storage power system in the fault or alarm state, the out-of-control temperature and humidity in the prefabricated cabin is avoided, the safe and efficient operation of the energy storage power system is ensured, meanwhile, the sensitivity of the thermal management method of the energy storage system can be enhanced, and the performance of the whole energy storage power system is further improved.

Based on the same technical concept, the embodiment of the application also provides an energy storage system thermal management device, and the principle of solving the problem of the energy storage system thermal management device is similar to that of the energy storage system thermal management method, so that the implementation of the energy storage system thermal management device can refer to the implementation of the energy storage system thermal management method, and the repetition is omitted.

Fig. 4 is a schematic structural diagram of a thermal management device of an energy storage system according to an embodiment of the present application, where the energy storage system includes at least one cell stack, a plurality of battery clusters corresponding to each cell stack, a plurality of air-cooled air conditioners, and a battery management system BMS, and the thermal management device includes an obtaining module 401, a first determining module 402, a second determining module 403, a first control module 404, and a second control module 405.

An obtaining module 401, configured to obtain a temperature value of each unit cell in each cell stack;

A first determining module 402, configured to control the BMS management mode to be turned on when determining that the thermal management requirement is satisfied based on the obtained temperature values of the individual battery cells;

a second determining module 403, configured to determine a first temperature parameter of each cell stack and a second temperature parameter of each cell cluster based on the temperature value of each cell;

A first control module 404, configured to control, based on the first temperature parameter of each stack, an air conditioner corresponding to each stack to execute a first control policy;

and the second control module 405 is configured to control the air conditioner corresponding to each battery cluster to execute a second control policy based on the second temperature parameter of each battery cluster.

In some embodiments, the first control strategy is to control the air-conditioning refrigeration corresponding to the battery stack to be started or control the air-conditioning heating corresponding to the battery stack to be started, and the second control strategy is to control the air-conditioning refrigeration corresponding to the battery cluster to be closed or control the air-conditioning heating corresponding to the battery cluster to be closed.

In some embodiments, the second determining module 403 is specifically configured to:

For any cell stack, determining the average temperature of the cell stack according to the average value of the temperature values of the cells in the cell stack and the maximum temperature of the cell stack according to the maximum temperature of each cell in the cell stack;

and aiming at any battery cluster, determining the highest temperature of the battery cluster according to the highest temperature of each single battery in the battery cluster, and determining the lowest temperature of the battery cluster according to the lowest temperature of each single battery in the battery cluster.

In some embodiments, the first control module 404 is specifically configured to:

For any battery stack, if the highest temperature of the battery stack is not less than a refrigeration starting temperature threshold value and the average temperature of the battery stack is not less than a first average temperature, controlling the air conditioner corresponding to the battery stack to be refrigerated and started;

And if the highest temperature of the battery stack is not greater than the heating starting temperature threshold value and the average temperature of the battery stack is not greater than the second average temperature, controlling the corresponding air conditioner of the battery stack to be heated and started.

In some embodiments, the second control module 405 is specifically configured to:

for any battery cluster, if the highest temperature of the battery cluster is not greater than a refrigeration closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be refrigerated and closed;

and if the lowest temperature of the battery cluster is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be heated and closed.

In some embodiments, when the first control module 404 controls the air conditioner corresponding to each battery stack to execute the first control policy or the second control module 405 controls the air conditioner corresponding to each battery cluster to execute the second control policy, the method further includes:

a third control module 406, configured to control, if the control strategy of the same cell stack includes both air conditioning heating start and air conditioning cooling start, the air conditioning cooling start corresponding to the cell stack;

If the control strategy of the same battery cluster comprises air conditioner refrigeration on and air conditioner refrigeration off at the same time, controlling the air conditioner refrigeration off corresponding to the battery cluster;

And if the control strategy of the same battery cluster comprises air conditioner heating on and air conditioner heating off, controlling the air conditioner heating off corresponding to the battery cluster.

In some embodiments, further comprising:

The monitoring module 407 is used for monitoring the environmental temperature in the battery compartment of the energy storage system acquired by the temperature and humidity sensor;

If the ambient temperature is lower than a preset low-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop refrigeration;

And if the ambient temperature is higher than a preset high-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop heating.

In some embodiments, the first determining module 402 is further configured to:

And controlling the BMS management mode to stop when the obtained temperature values of the single batteries are determined to not meet the thermal management requirement, wherein the condition that the temperature of the single batteries is not higher than a first preset threshold and the temperature of the single batteries is not lower than a second preset threshold.

The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The coupling of the individual modules to each other may be achieved by means of interfaces which are typically electrical communication interfaces, but it is not excluded that they may be mechanical interfaces or other forms of interfaces. Thus, the modules illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed in different locations on the same or different devices. The integrated modules may be implemented in hardware or in software functional modules.

Having described the energy storage system thermal management method and apparatus of an exemplary embodiment of the present application, next, an electronic device according to another exemplary embodiment of the present application is described.

An electronic device 130 implemented according to such an embodiment of the present application is described below with reference to fig. 5. The electronic device 130 shown in fig. 5 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present application.

As shown in fig. 5, the electronic device 130 is in the form of a general-purpose electronic device. Components of electronic device 130 may include, but are not limited to: the at least one processor 131, the at least one memory 132, and a bus 133 connecting the various system components, including the memory 132 and the processor 131.

Bus 133 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, and a local bus using any of a variety of bus architectures.

Memory 132 may include readable media in the form of volatile memory such as Random Access Memory (RAM) 1321 and/or cache memory 1322, and may further include Read Only Memory (ROM) 1323.

Memory 132 may also include a program/utility 1325 having a set (at least one) of program modules 1324, such program modules 1324 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

The electronic device 130 may also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), one or more devices that enable a user to interact with the electronic device 130, and/or any device (e.g., router, modem, etc.) that enables the electronic device 130 to communicate with one or more other electronic devices. Such communication may occur through an input/output (I/O) interface 135. Also, electronic device 130 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 136. As shown, network adapter 136 communicates with other modules for electronic device 130 over bus 133. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 130, including, but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

In an exemplary embodiment, a storage medium is also provided, which is capable of performing the above-described energy storage system thermal management method when a computer program in the storage medium is executed by a processor of an electronic device. Alternatively, the storage medium may be a non-transitory computer readable storage medium, which may be, for example, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

In an exemplary embodiment, the electronic device of the present application may include at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores a computer program executable by the at least one processor, which when executed by the at least one processor, causes the at least one processor to perform the steps of any of the energy storage system thermal management methods provided by the embodiments of the present application.

In an exemplary embodiment, a computer program product is also provided, which, when executed by an electronic device, is capable of carrying out any one of the exemplary methods provided by the application.

Also, a computer program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, a RAM, a ROM, an erasable programmable read-only memory (EPROM), flash memory, optical fiber, compact disc read-only memory (Compact Disk Read Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The program product for thermal management of an energy storage system in embodiments of the present application may take the form of a CD-ROM and include program code that can run on a computing device. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio Frequency (RF), etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, such as a local area network (Local Area Network, LAN) or wide area network (Wide Area Network, WAN), or may be connected to an external computing device (e.g., connected over the internet using an internet service provider).

It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functions of two or more of the elements described above may be embodied in one element in accordance with embodiments of the present application. Conversely, the features and functions of one unit described above may be further divided into a plurality of units to be embodied.

Furthermore, although the operations of the methods of the present application are depicted in the drawings in a particular order, this is not required or suggested that these operations must be performed in this particular order or that all of the illustrated operations must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A method for thermal management of an energy storage system, wherein the energy storage system includes at least one stack, a plurality of battery clusters corresponding to each stack, a plurality of air-cooled air conditioners, and a battery management system BMS, the method comprising:

acquiring the temperature value of each single battery in each battery stack;

Based on the obtained temperature values of the single batteries, when the thermal management requirements are met, controlling the BMS management mode to be started;

determining a first temperature parameter of each cell stack and a second temperature parameter of each cell cluster based on the temperature value of each single cell;

Based on the first temperature parameter of each cell stack, controlling the air conditioner corresponding to each cell stack to execute a first control strategy;

and controlling the air conditioner corresponding to each battery cluster to execute a second control strategy based on the second temperature parameter of each battery cluster.

2. The method of claim 1, wherein the first control strategy is to control on air conditioning cooling corresponding to the stack or to control on air conditioning heating corresponding to the stack, and the second control strategy is to control off air conditioning cooling corresponding to the battery cluster or to control off air conditioning heating corresponding to the battery cluster.

3. The method of claim 1 or 2, wherein determining the first temperature parameter for each stack and the second temperature parameter for each cluster based on the temperature values of each cell comprises:

For any cell stack, determining the average temperature of the cell stack according to the average value of the temperature values of the cells in the cell stack and the maximum temperature of the cell stack according to the maximum temperature of each cell in the cell stack;

and aiming at any battery cluster, determining the highest temperature of the battery cluster according to the highest temperature of each single battery in the battery cluster, and determining the lowest temperature of the battery cluster according to the lowest temperature of each single battery in the battery cluster.

4. The method of claim 3, wherein controlling the air conditioner associated with each stack to execute a first control strategy based on the first temperature parameter of each stack comprises:

For any battery stack, if the highest temperature of the battery stack is not less than a refrigeration starting temperature threshold value and the average temperature of the battery stack is not less than a first average temperature, controlling the air conditioner corresponding to the battery stack to be refrigerated and started;

And if the highest temperature of the battery stack is not greater than the heating starting temperature threshold value and the average temperature of the battery stack is not greater than the second average temperature, controlling the corresponding air conditioner of the battery stack to be heated and started.

5. The method of claim 3, wherein controlling the air conditioner corresponding to each battery cluster to execute the second control strategy based on the second temperature parameter of each battery cluster comprises:

for any battery cluster, if the highest temperature of the battery cluster is not greater than a refrigeration closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be refrigerated and closed;

and if the lowest temperature of the battery cluster is not less than the heating closing temperature threshold, controlling the air conditioner corresponding to the battery cluster to be heated and closed.

6. The method of claim 2, wherein when controlling the air conditioner corresponding to each stack to execute the first control strategy or controlling the air conditioner corresponding to each cluster to execute the second control strategy, further comprising:

If the control strategy of the same cell stack comprises air conditioner heating start and air conditioner refrigerating start at the same time, controlling the air conditioner refrigerating start corresponding to the cell stack;

If the control strategy of the same battery cluster comprises air conditioner refrigeration on and air conditioner refrigeration off at the same time, controlling the air conditioner refrigeration off corresponding to the battery cluster;

And if the control strategy of the same battery cluster comprises air conditioner heating on and air conditioner heating off, controlling the air conditioner heating off corresponding to the battery cluster.

7. The method as recited in claim 1, further comprising:

Monitoring the ambient temperature in a battery compartment of the energy storage system acquired by the temperature and humidity sensor;

If the ambient temperature is lower than a preset low-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop refrigeration;

And if the ambient temperature is higher than a preset high-temperature alarm value, controlling the air conditioner corresponding to each cell stack to stop heating.

8. The method as recited in claim 1, further comprising:

And controlling the BMS management mode to stop when the obtained temperature values of the single batteries are determined to not meet the thermal management requirement, wherein the condition that the temperature of the single batteries is not higher than a first preset threshold and the temperature of the single batteries is not lower than a second preset threshold.

9. An energy storage system thermal management device, wherein, energy storage system includes at least one battery pile, a plurality of battery clusters that each battery pile corresponds, a plurality of forced air cooling air conditioner and battery management system BMS, the device includes:

The acquisition module is used for acquiring the temperature value of each single battery in each battery stack;

The first determining module is used for controlling the BMS management mode to be started when the thermal management requirement is met based on the acquired temperature values of the single batteries;

The second determining module is used for determining a first temperature parameter of each battery stack and a second temperature parameter of each battery cluster based on the temperature value of each single battery;

the first control module is used for controlling the air conditioner corresponding to each battery stack to execute a first control strategy based on the first temperature parameter of each battery stack;

and the second control module is used for controlling the air conditioner corresponding to each battery cluster to execute a second control strategy based on the second temperature parameter of each battery cluster.

10. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein:

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-8.