Temperature control method and device, energy storage system and medium

Abstract

The invention discloses a temperature control method and device, an energy storage system and a medium, the method is applied to the energy storage system, the energy storage system comprises a plurality of battery clusters, each battery cluster comprises a plurality of battery packs connected in series, and the method comprises the following steps: selecting at least one battery cluster from the plurality of battery clusters according to the current of each battery cluster to form a first battery cluster set; screening the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, the second battery cluster set comprising at least one battery cluster; and controlling the temperatures of the plurality of battery clusters according to the temperature information of the battery clusters in the second battery cluster set. According to the embodiment of the invention, the problem that the temperature information of the battery cluster in the working state is mixed with the temperature information of the battery cluster in the non-working state can be avoided, so that the matching degree of the temperature control of the battery cluster and the actual demand of the battery cluster can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and in particular, to a temperature control method, device, energy storage system and medium. Background Art

[0002] The temperature control of an energy storage system generally relies on the temperature acquisition of the battery cells in the battery cluster and the monitoring of the status of the liquid cooling unit as the main judgment basis, and then designs a corresponding temperature control scheme. In actual application scenarios, individual battery clusters may have exited the working state. If the temperature of the battery cells in this battery cluster is still used as the judgment basis, it will lead to a mismatch between the temperature control of the battery cluster and the actual needs of the battery cluster. Summary of the Invention

[0003] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a temperature control method, device, energy storage system and medium, which can make the temperature control of the battery cluster match the actual needs of the battery cluster.

[0004] In a first aspect, an embodiment of the present invention provides a temperature control method, the method comprising:

[0005] Selecting at least one of the battery clusters from a plurality of the battery clusters according to the current of each of the battery clusters to form a first battery cluster set;

[0006] Screening the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, the second battery cluster set including at least one of the battery clusters;

[0007] Controlling the temperature of a plurality of the battery clusters according to the temperature information of the battery clusters in the second battery cluster set.

[0008] The temperature control method provided by the embodiments of the present invention has at least the following beneficial effects: at least one battery cluster is selected from multiple battery clusters according to the current of each battery cluster to form a first battery cluster set; the battery clusters in the first battery cluster set are screened according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, and the second battery cluster set includes at least one battery cluster; the temperatures of multiple battery clusters are controlled according to the temperature information of the battery clusters in the second battery cluster set. Since the battery clusters are screened from all the battery clusters of the energy storage system according to the current of the battery clusters to form a first battery cluster set, the problem of mixing the temperature information of the battery clusters in the working state and the temperature information of the battery clusters in the non-working state is avoided. Then, according to the temperature information of each battery cluster in the first battery cluster set, the battery clusters in the first battery cluster set are screened to determine the battery clusters that most need to be regulated, and a second battery cluster set is formed. The temperatures of multiple battery clusters are controlled according to the temperature information of the battery clusters in the second battery cluster set, so that the temperature control of the battery clusters better matches the actual requirements of the current battery clusters.

[0009] In some embodiments, the energy storage system further includes a liquid cooling unit for adjusting the temperatures of multiple battery clusters;

[0010] The step of selecting at least one battery cluster from multiple battery clusters according to the current of each battery cluster to form a first battery cluster set includes:

[0011] Determine the current state of the liquid cooling unit according to the currents of multiple battery clusters;

[0012] When the current state is the first state, select the battery clusters with currents greater than the first threshold from multiple battery clusters to form a first battery cluster set, and the first state is used to indicate that the liquid cooling unit is in a non-static state;

[0013] When the current state is the second state, select all the battery clusters from multiple battery clusters to form a first battery cluster set, and the second state is used to indicate that the liquid cooling unit is in a static state.

[0014] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster;

[0015] The step of screening the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set includes:

[0016] When the minimum temperature of each battery cluster in the first battery cluster set is greater than a second threshold, and there is at least one battery cluster in the first battery cluster set whose maximum temperature is greater than or equal to a third threshold, the battery cluster with the highest temperature in the first battery cluster set is used as the battery cluster in the second battery cluster set, where the second threshold is less than the third threshold;

[0017] When the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, and there is at least one battery cluster in the first battery cluster set whose minimum temperature is less than or equal to the second threshold, the battery cluster with the lowest temperature in the first battery cluster set is used as the battery cluster in the second battery cluster set;

[0018] When the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold, and the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, the battery cluster with the largest temperature difference in the first battery cluster set is used as the battery cluster in the second battery cluster set, where the temperature difference is the difference between the maximum temperature and the minimum temperature of the battery cluster.

[0019] In some embodiments, the second threshold corresponding to the first state is greater than the second threshold corresponding to the second state;

[0020] The third threshold corresponding to the first state is less than the third threshold corresponding to the second state.

[0021] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the first state;

[0022] Controlling the temperature of the multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes:

[0023] If the temperature information of the battery clusters in the second battery cluster set satisfies a first preset condition, control the liquid cooling unit to turn on the refrigeration mode;

[0024] Wherein, the first preset condition includes any one of the following:

[0025] The first maximum reference temperature is greater than or equal to the third threshold, and the first reference temperature difference is less than or equal to the fourth threshold;

[0026] The first minimum reference temperature is greater than or equal to the fifth threshold, and the first reference temperature difference is less than or equal to the fourth threshold;

[0027] The first maximum reference temperature is greater than the sixth threshold;

[0028] Among them, the sixth threshold is greater than the third threshold, the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set, the first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set, and the first reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the second battery cluster set.

[0029] In some embodiments, after controlling the liquid cooling unit to turn on the refrigeration mode if the temperature information of the battery clusters in the second battery cluster set meets the first preset condition, the method further includes:

[0030] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0031] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one of the battery clusters;

[0032] If the temperature information of the battery clusters in the fourth battery cluster set meets the second preset condition, control the liquid cooling unit to turn on the self-circulation mode;

[0033] Among them, the second preset condition includes any one of the following:

[0034] The second maximum reference temperature is less than or equal to the fifth threshold;

[0035] The second maximum reference temperature is less than or equal to the seventh threshold, and the second reference temperature difference is greater than or equal to the eighth threshold.

[0036] Among them, the fifth threshold is less than the seventh threshold, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0037] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster;

[0038] The controlling the temperature of the multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes:

[0039] If the temperature information of the battery clusters in the second battery cluster set meets the third preset condition, control the liquid cooling unit to turn on the heating mode;

[0040] Wherein, the third preset condition is that the first minimum reference temperature is less than or equal to the second threshold value. The first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set. The second threshold value corresponding to the first state is greater than the second threshold value corresponding to the second state.

[0041] In some embodiments, the current state is the first state;

[0042] After controlling the liquid cooling unit to turn on the heating mode if the temperature information of the battery clusters in the second battery cluster set meets the third preset condition, the method further includes:

[0043] Select at least one battery cluster from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0044] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one battery cluster;

[0045] If the temperature information of the battery clusters in the fourth battery cluster set meets the fourth preset condition, control the liquid cooling unit to turn on the self-circulation mode;

[0046] Wherein, the fourth preset condition includes any one of the following:

[0047] The second minimum reference temperature is greater than or equal to the ninth threshold value;

[0048] The second maximum reference temperature is greater than or equal to the tenth threshold value;

[0049] Wherein, the ninth threshold value is less than the tenth threshold value. The second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set. The second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set.

[0050] In some embodiments, the current state is the second state;

[0051] After controlling the liquid cooling unit to turn on the heating mode if the temperature information of the battery clusters in the second battery cluster set meets the third preset condition, the method further includes:

[0052] Select at least one battery cluster from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0053] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, where the fourth battery cluster set includes at least one of the battery clusters;

[0054] If the temperature information of the battery clusters in the fourth battery cluster set meets a fifth preset condition, then control the liquid cooling unit to enter the standby mode;

[0055] Wherein, the fifth preset condition includes any one of the following:

[0056] The second minimum reference temperature is greater than or equal to an eleventh threshold, and the second reference temperature difference is less than a twelfth threshold;

[0057] The second maximum reference temperature is greater than or equal to a thirteenth threshold, and the second reference temperature difference is less than a twelfth threshold;

[0058] Wherein, the eleventh threshold is less than the thirteenth threshold, the second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0059] In some embodiments, after obtaining the fourth battery cluster set, the method further includes:

[0060] If the temperature information of the battery clusters in the fourth battery cluster set meets a sixth preset condition, then control the liquid cooling unit to enter the self - circulation mode;

[0061] Wherein, the sixth preset condition includes any one of the following:

[0062] The second minimum reference temperature is greater than or equal to the eleventh threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold;

[0063] The second maximum reference temperature is greater than or equal to the thirteenth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold.

[0064] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the second state;

[0065] Controlling the temperature of the multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes:

[0066] If the temperature information of the battery clusters in the second battery cluster set satisfies the seventh preset condition, control the liquid cooling unit to turn on the refrigeration mode;

[0067] Wherein, the seventh preset condition is that the first maximum reference temperature is greater than or equal to the third threshold, and the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set.

[0068] In some embodiments, after the step of if the temperature information of the battery clusters in the second battery cluster set satisfies the seventh preset condition, control the liquid cooling unit to turn on the refrigeration mode, the method further includes:

[0069] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0070] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one of the battery clusters;

[0071] If the temperature information of the battery clusters in the fourth battery cluster set satisfies the eighth preset condition, control the liquid cooling unit to turn on the standby mode;

[0072] Wherein, the eighth preset condition includes:

[0073] The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is less than the twelfth threshold;

[0074] Wherein, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0075] In some embodiments, after obtaining the fourth battery cluster set, the method further includes:

[0076] If the temperature information of the battery clusters in the fourth battery cluster set satisfies the ninth preset condition, control the liquid cooling unit to turn on the self-circulation mode;

[0077] Wherein, the ninth preset condition includes any one of the following:

[0078] The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold;

[0079] The second maximum reference temperature is less than or equal to the seventh threshold, and the second reference temperature difference is greater than or equal to the eighth threshold. The fifth threshold is less than the seventh threshold, and the eighth threshold is greater than the twelfth threshold.

[0080] In some embodiments, after controlling the liquid cooling unit to turn on the self - circulation mode, the method further includes:

[0081] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a fifth battery cluster set;

[0082] Screen the battery clusters in the fifth battery cluster set according to the temperature information of each battery cluster in the fifth battery cluster set to obtain a sixth battery cluster set, and the sixth battery cluster set includes at least one of the battery clusters;

[0083] If the temperature information of the battery clusters in the sixth battery cluster set satisfies the tenth preset condition, control the liquid cooling unit to turn on the standby mode. The tenth preset condition is that the third reference temperature difference is less than the fourteenth threshold, where the third reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the sixth battery cluster set.

[0084] In a second aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to implement the temperature control method as described in the first aspect.

[0085] In a third aspect, an embodiment of the present invention further provides an energy storage system, including:

[0086] Multiple battery clusters; and

[0087] The electronic device as described in the second aspect, where each battery cluster includes multiple serially connected battery packs.

[0088] In a fourth aspect, an embodiment of the present invention further provides a computer - readable storage medium, where the computer - readable storage medium stores computer - executable instructions, and the computer - executable instructions are used to cause an air conditioner to execute the temperature control method as described in the first aspect.

[0089] Other features and advantages of the present invention will be described in the following description of the specification, and part of them will become obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the specification, the claims, and the drawings. Description of the Drawings

[0090] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention, and do not constitute a limitation to the technical solution of the present invention.

[0091] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0092] Figure 1 is a flowchart of a temperature control method provided by an embodiment of the present invention;

[0093] Figure 2 is a schematic diagram of the structure of an energy storage system provided by an embodiment of the present invention;

[0094] Figure 3 is a logic flowchart of the temperature control method provided by an embodiment of the present invention;

[0095] Figure 4 is a logic flowchart of controlling an energy storage system based on the temperature control method provided by another embodiment of the present invention;

[0096] Figure 5 is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present invention. Detailed Embodiments

[0097] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The role of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation to the protection scope of the present invention.

[0098] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, "above", "below", "within", etc. are understood as including the number itself, "any one" means one or more, and "at least one of the following" and its similar expressions refer to any combination of these items, including any combination of single items or plural items. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0099] It should be noted that the terms "set", "install", "connect", etc. in the embodiments of the present invention should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connect" can be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium.

[0100] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0101] The temperature control of the energy storage system generally relies on the collection of the core temperature of the battery cluster and the monitoring of the status of the liquid cooling unit as the main judgment basis, and then designs the corresponding temperature control scheme. In the actual application scenario, individual battery clusters may have exited the working state. If the core temperature of this battery cluster is still used as the judgment basis, it will lead to a mismatch between the temperature control of the battery cluster and the actual needs of the battery cluster.

[0102] In order to improve the prediction accuracy of the power saving of the air conditioner, an embodiment of the present invention provides a temperature control method. This method selects at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a first battery cluster set; screens the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, and the second battery cluster set includes at least one of the battery clusters; controls the temperature of the multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set. Since the battery clusters are screened from all the battery clusters of the energy storage system according to the current of the battery clusters to form a first battery cluster set, the problem of mixing the temperature information of the battery clusters in the working state and the temperature information of the battery clusters in the non-working state is avoided. Then, according to the temperature information of each battery cluster in the first battery cluster set, the battery clusters in the first battery cluster set are screened to determine the battery clusters that most need to be regulated, and a second battery cluster set is formed. The temperature of the multiple battery clusters is controlled according to the temperature information of the battery clusters in the second battery cluster set, so that the temperature control of the battery cluster is more matched with the actual needs of the current battery cluster.

[0103] Refer to Figure 1 as shown Figure 1 is a flowchart of a temperature control method provided by an embodiment of the present invention. This temperature control method is applied to an energy storage system. The energy storage system includes multiple battery clusters, and each battery cluster includes multiple series-connected battery packs. This temperature control method includes but is not limited to steps S100 to step S300.

[0104] Step S100: Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a first battery cluster set;

[0105] Step S200: Screen the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, and the second battery cluster set includes at least one of the battery clusters;

[0106] Step S300: Control the temperatures of the multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set.

[0107] In some embodiments, the current of each battery cluster in the energy storage system is obtained, and it is determined whether the battery cluster is in a working state (i.e., the battery cluster is in a charge-discharge working state) or a non-working state (i.e., the current of the battery cluster is zero) according to the current of the battery cluster, so as to distinguish the battery clusters in different working states, thereby improving the matching degree between the temperature control of the battery clusters and the actual requirements of the battery clusters. Among them, the current of the battery cluster can be obtained through a current sensor or through a pre-configured data acquisition unit, and no specific limitation is made here.

[0108] In some embodiments, the maximum temperature of a battery cluster refers to the highest value of the collected values of the temperature sensors of all battery packs in the battery cluster. Specifically, it can be realized by arranging temperature sensors inside the battery packs and reading the data in real time, and is used to characterize the degree of thermal runaway risk of the battery cluster. Among them, the minimum temperature of the battery cluster refers to the lowest value of the collected values of the temperature sensors of all battery packs in the battery cluster. Specifically, the same temperature acquisition system can be used to realize it, and is used to identify the risk of capacity attenuation caused by the low-temperature operation of the battery cluster; further, the temperature difference of the battery cluster can be calculated according to the maximum temperature and the minimum temperature of the battery cluster, and according to the maximum temperature, the minimum temperature and the temperature difference of each battery cluster, the battery cluster that most needs to be regulated is determined and used as the battery cluster in the second battery cluster set. Among them, the temperature information of the battery cluster can be obtained through a temperature sensor or through a thermistor, and no specific limitation is made here.

[0109] It should be noted that, according to the maximum temperature, the minimum temperature and the temperature difference of each battery cluster, the battery cluster that most needs to be regulated is determined, which can be selected according to the actual situation, that is, the battery cluster with the maximum temperature can be selected, the battery cluster with the minimum temperature can be selected, or the battery cluster with the largest temperature difference can be selected, and no specific limitation is made here.

[0110] In some embodiments, the energy storage system further includes a liquid cooling unit, and the liquid cooling unit is used to adjust the temperatures of the multiple battery clusters. The multiple battery clusters share one liquid cooling unit. When only one battery cluster is included in the second battery cluster set, the working mode of the liquid cooling unit is adjusted according to the temperature information of the battery cluster to control the temperatures of the multiple battery clusters. When multiple battery clusters are included in the second battery cluster set, the working mode of the liquid cooling unit can be adjusted according to the average temperature of the battery clusters in the first battery cluster set to control the temperatures of the multiple battery clusters.

[0111] In some embodiments, at least one battery cluster is selected from the multiple battery clusters according to the current of each battery cluster to form a first battery cluster set, which may include but is not limited to the following:

[0112] Determine the current state of the liquid cooling unit according to the currents of multiple battery clusters;

[0113] When the current state is the first state, select battery clusters with currents greater than the first threshold from multiple battery clusters to form a first battery cluster set, where the first state is used to indicate that the liquid cooling unit is in a non - static state;

[0114] When the current state is the second state, select all the battery clusters from multiple battery clusters to form a first battery cluster set, where the second state is used to indicate that the liquid cooling unit is in a static state.

[0115] In some embodiments, when the current of at least one battery cluster in the energy storage system is not zero, it is determined that the liquid cooling unit is in a non - static state, i.e., the first state; when the currents of all battery clusters in the energy storage system are zero, it is determined that the liquid cooling unit is in a static state, i.e., the second state. Here, the static state refers to any one of the states where the liquid cooler is in a stopped operation state and a power - off state.

[0116] In some embodiments, when the current of a battery cluster is zero, it is determined that the battery cluster is in a non - working state; when the current of a battery cluster is not zero, it is determined that the battery cluster is in a working state.

[0117] Furthermore, when the current state of the liquid cooling unit is a non - static state, if the current of each battery cluster in the energy storage system is not zero, select all the battery clusters from multiple battery clusters to form a first battery cluster set; if there are some battery clusters with zero current and some with non - zero current among multiple battery clusters, select the battery clusters with non - zero current from multiple battery clusters to form a first battery cluster set, so as to exclude the battery clusters in the non - working state, ensure that the temperature control is based on the effectively operating battery clusters, facilitate the subsequent accurate construction of the second battery cluster, and make the temperature control more match the actual needs of the current battery clusters. Here, the first threshold is set to zero.

[0118] In some embodiments, when the current state of the liquid cooling unit is a static state, i.e., the currents of multiple battery clusters are all zero, select all the battery clusters from multiple battery clusters to form a first battery cluster set.

[0119] In other embodiments, the first threshold can be set according to the actual situation. When the liquid cooling unit is in a non - static state, battery clusters with high current values are screened out through the first threshold, and battery clusters with too low current values are filtered out, that is, high - activity battery clusters are screened out to form a first battery cluster set, so as to avoid including the information of low - current batteries that have exited work or have low activity in the subsequent temperature screening, improve the accuracy of temperature, and thus improve the matching degree between the temperature control of the battery cluster and the actual needs of the battery cluster.

[0120] In some embodiments, the temperature information of the battery clusters includes the maximum temperature and the minimum temperature of the battery clusters. Screening the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set may include, but is not limited to, the following:

[0121] When the minimum temperature of each battery cluster in the first battery cluster set is greater than a second threshold, and there is at least one battery cluster in the first battery cluster set whose maximum temperature is greater than or equal to a third threshold, the battery cluster with the highest temperature in the first battery cluster set is used as the battery cluster in the second battery cluster set, where the second threshold is less than the third threshold;

[0122] When the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, and there is at least one battery cluster in the first battery cluster set whose minimum temperature is less than or equal to the second threshold, the battery cluster with the lowest temperature in the first battery cluster set is used as the battery cluster in the second battery cluster set;

[0123] When the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold, and the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, the battery cluster with the largest temperature difference in the first battery cluster set is used as the battery cluster in the second battery cluster set, where the temperature difference is the difference between the maximum temperature and the minimum temperature of the battery cluster.

[0124] In some embodiments, the second threshold may be a preset low-temperature warning line, for example, set to 16 degrees Celsius, for triggering active intervention in abnormally low-temperature battery clusters; the third threshold may be a preset high-temperature warning line, for example, set to 30 degrees Celsius, for identifying battery clusters that require heat dissipation treatment. When the lowest temperature of a battery cluster in the first battery cluster set is less than the second threshold, it indicates that the heating mode of the liquid cooling unit needs to be controlled to be turned on at this time to increase the temperature of multiple battery clusters. When the highest temperature of a battery cluster in the first battery cluster set is higher than the high-temperature threshold, it indicates that the cooling mode of the liquid cooling unit needs to be controlled to be turned on at this time to reduce the temperature of multiple battery clusters. When there is no battery cluster in the first battery cluster set with a temperature lower than the second threshold and no battery cluster with a temperature higher than the third threshold, it indicates that the temperature is relatively good at this time, and only the self-circulation mode of the liquid cooling unit needs to be controlled to be turned on to reduce the temperature difference of each battery cluster and thus maintain the temperature balance of the battery clusters.

[0125] It should be noted that both the second threshold and the third threshold can be set according to the actual situation and are not specifically limited here. However, it should be noted that since the second threshold is used to judge the low-temperature situation and the third threshold is used to judge the high-temperature situation, when setting, the second threshold needs to be less than the third threshold. And generally, the temperatures of the battery clusters in the same energy storage system will not vary too much, that is, the temperatures of the battery clusters in the same energy storage system will not be both lower than the second threshold and higher than the third threshold.

[0126] In some embodiments, when it is detected that the minimum temperature of all battery clusters in the first battery cluster set is higher than the second threshold, it indicates that there are no abnormally low-temperature battery clusters in the energy storage system. At this time, if the highest temperature of at least one battery cluster exceeds the third threshold, the battery cluster with the highest temperature is preferentially selected as the control object, and the liquid chiller is controlled to start the refrigeration mode to cool down the battery cluster.

[0127] In some other embodiments, a super-high temperature threshold can be set, and the super-high temperature threshold is greater than the third threshold. When the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold and there is a battery cluster with a maximum temperature greater than the third threshold, the battery cluster in the first battery cluster set with a maximum temperature exceeding the super-high temperature threshold is selected as the battery cluster in the second battery cluster set.

[0128] In some embodiments, when the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold and there is a battery cluster with a minimum temperature greater than the second threshold, it indicates that multiple battery clusters need to be heated at this time. The battery cluster with the lowest temperature is selected from the first battery clusters as the battery cluster in the second battery cluster set.

[0129] In some other embodiments, a super-low temperature threshold can be set, and the super-low temperature threshold is lower than the second threshold. When the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold and there is a battery cluster with a minimum temperature greater than the second threshold, the battery cluster in the first battery cluster set with the lowest temperature lower than the super-low temperature threshold is selected as the battery cluster in the second battery cluster set.

[0130] In some embodiments, when the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold and the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, it indicates that the temperatures among the battery clusters are relatively balanced at this time. Therefore, the battery cluster with the largest difference between the maximum temperature and the minimum temperature is selected from the first battery clusters as the battery cluster in the second battery cluster set.

[0131] In some other embodiments, a temperature difference threshold can be set. When the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold and the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, the battery clusters with the difference between the maximum temperature and the minimum temperature greater than the temperature difference threshold are selected from the first battery clusters as the battery clusters in the second battery cluster set.

[0132] It should be noted that the ultra-high temperature threshold, ultra-low temperature threshold, and temperature difference threshold can all be set according to the actual situation and are not specifically limited here.

[0133] In this embodiment, when the liquid cooling unit is in the working state, by setting the second threshold to a higher value (such as 25 °C) and the third threshold to a lower value (such as 40 °C), a relatively strict temperature control range is formed, enabling the energy storage system to quickly identify possible local overheating points or low-temperature areas in the battery clusters during the active temperature regulation stage and promptly initiate corresponding regulation measures. When the unit is in the static state, the second threshold is adjusted to a lower value (such as 20 °C), and the third threshold is adjusted to a higher value (such as 45 °C), forming a monitoring range with a larger fault tolerance range. By relaxing the threshold, the temperature safety monitoring during the dormancy period of the energy storage system is ensured, and frequent triggering of ineffective temperature control instructions when the cooling system is not running is avoided; therefore, the second threshold corresponding to the first state is greater than the second threshold corresponding to the second state, and the third threshold corresponding to the first state is less than the third threshold corresponding to the second state.

[0134] Exemplarily, as Figure 2 shown, exemplarily, as Figure 2 shown, Figure 2 It shows that the energy storage system includes two groups of battery clusters and a liquid cooling unit. In the figure, label 1 represents the liquid cooling unit, label 2 represents the inlet (return) water pipe, label 3 represents the inlet (return) water pipe, label 4 represents the series pipeline, label 5 represents battery cluster one, label 6 represents battery cluster two, T 1max represents the maximum temperature of battery cluster one, T 2max represents the maximum temperature of battery cluster two, T 1min represents the minimum temperature of battery cluster one, T 2min represents the minimum temperature of battery cluster two. The second threshold in the first state is set to 16 °C, the third threshold in the first state is set to 30 °C, the second threshold in the second state is set to 12 °C, and the third threshold in the second state is set to 36 °C.

[0135] In the first state:

[0136] When T 1max ≥ 30 °C, T 2max ≥ 30 °C, if T 1max ≥ T 2max, then select Battery Cluster 1 as the battery cluster in the second battery cluster set. If T 2max > T 1max , then select Battery Cluster 2 as the battery cluster in the second battery cluster set.

[0137] When T 1max ≥ 30°C and T 2max < 30°C, select Battery Cluster 1 as the battery cluster in the second battery cluster set.

[0138] When T 1max < 30°C and T 2max ≥ 30°C, select Battery Cluster 2 as the battery cluster in the second battery cluster set.

[0139] When T 1max ≤ 16°C and T 2max ≤ 16°C, if T 1max ≤ T 2max , then select Battery Cluster 1 as the battery cluster in the second battery cluster set. If T 2max < T 1max , then select Battery Cluster 2 as the battery cluster in the second battery cluster set.

[0140] When T 1max ≤ 16°C and T 2max > 16°C, select Battery Cluster 1 as the battery cluster in the second battery cluster set.

[0141] When T 1max > 16°C and T 2max ≤ 16°C, select Battery Cluster 2 as the battery cluster in the second battery cluster set.

[0142] When T 1max < 30°C, T 2max < 30°C, and T 1max > 16°C, T 2max > 16°C, if T 1max - T 1min ≥ T 2max - T 2min , then select Battery Cluster 1 as the battery cluster in the second battery cluster set. If T 1max - T 1min < T 2max - T 2min , then select Battery Cluster 2 as the battery cluster in the second battery cluster set.

[0143] The judgment logic in the second state is the same as that in the first state, and only the parameters of the second threshold and the third threshold in different states need to be changed.

[0144] In some embodiments, it is possible to accurately identify the battery clusters that need to be preferentially processed based on the real-time temperature distribution characteristics, automatically eliminate the interference of non-operating battery clusters during the operation of the liquid cooling unit, and concentrate the temperature control resources on the battery clusters with actual temperature anomalies. For example, in the scenario of parallel operation of battery clusters, when a certain battery cluster is disconnected due to a fault, its temperature data no longer participates in subsequent control decisions, thereby avoiding incorrect triggering of heating or cooling operations and ensuring that the temperature control instructions are fully matched with the actual operating state of the battery clusters.

[0145] In some embodiments, the temperature information of the battery clusters includes the maximum temperature and the minimum temperature of the battery clusters. The current state is the first state. Controlling the temperatures of multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set may include, but is not limited to, the following:

[0146] If the temperature information of the battery clusters in the second battery cluster set satisfies the first preset condition, then control the liquid cooling unit to turn on the refrigeration mode;

[0147] Wherein, the first preset condition includes any one of the following:

[0148] The first maximum reference temperature is greater than or equal to the third threshold, and the first reference temperature difference is less than or equal to the fourth threshold;

[0149] The first minimum reference temperature is greater than or equal to the fifth threshold, and the first reference temperature difference is less than or equal to the fourth threshold;

[0150] The first maximum reference temperature is greater than the sixth threshold;

[0151] Wherein, the sixth threshold is greater than the third threshold, the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set, the first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set, and the first reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the second battery cluster set.

[0152] In some embodiments, when only one battery cluster is included in the second battery cluster set, the maximum temperature of the battery cluster is used as the first maximum reference temperature, the minimum temperature of the battery cluster is used as the first minimum reference temperature, and the difference between the maximum temperature and the minimum temperature of the battery cluster is used as the first reference temperature difference; when multiple battery clusters are included in the second battery cluster set, the average value of the maximum temperatures of the multiple battery clusters in the second battery cluster set is used as the first maximum reference temperature, the average value of the minimum temperatures of the multiple battery clusters in the second battery cluster set is used as the first minimum reference temperature, and the difference between the average value of the maximum temperatures and the average value of the minimum temperatures of the multiple battery clusters in the second battery cluster set is used as the first reference temperature difference.

[0153] Specifically, when the liquid cooling unit is in an operating state, first, select the working battery clusters with a current higher than the first threshold to form a first battery cluster set, excluding the battery clusters that have exited the operation; then, perform temperature characteristic analysis on the battery clusters in the first battery cluster set to construct a second battery cluster set. When it is detected that the highest temperature of a certain battery cluster in the second battery cluster set exceeds the third threshold but the internal temperature difference is less than the fourth threshold, it indicates that the overall battery cluster has entered a stable overheating state and refrigeration needs to be started; if it is detected that the lowest temperature exceeds the fifth threshold and the temperature difference is less than the fourth threshold, it means that all battery packs are in a critical high-temperature environment and early intervention is required; when an extreme situation occurs, such as the highest temperature of a certain battery cluster is greater than the sixth threshold, forced refrigeration is immediately started to prevent thermal runaway; this combined judgment mechanism of the three conditions enables the energy storage system to adopt corresponding control strategies according to different overheating development stages, avoiding misoperations caused by temperature interference of non-working battery clusters or local transient temperature rises.

[0154] It should be noted that the third threshold, the fifth threshold, and the sixth threshold can be set according to the actual situation and are not specifically limited here. However, it should be noted that since the sixth threshold indicates that the temperature is already too high at this time, the sixth threshold needs to be greater than the third threshold when setting.

[0155] Exemplarily, as Figure 3 shown, when the current state of the hydraulic unit is the non-static state, i.e., the first state, the third threshold is set to 30 °C, the fourth threshold is set to 6 °C, the fifth threshold is set to 28 °C, and the sixth threshold is set to 35 °C. When the first maximum reference temperature is greater than or equal to 30 °C and the first reference temperature difference is less than or equal to 6 °C, control the liquid cooling unit to turn on the refrigeration mode; when the first maximum reference temperature is greater than or equal to 28 °C and the first reference temperature difference is less than or equal to 6 °C, control the liquid cooling unit to turn on the refrigeration mode; or when the first reference temperature is greater than 35 °C, control the liquid cooling unit to turn on the refrigeration mode.

[0156] In this embodiment, by excluding non-working units through current screening and combining the joint judgment of the three dimensions of the highest temperature, the lowest temperature, and the temperature difference, both the energy waste caused by ineffective refrigeration is avoided, and the target battery clusters that truly require temperature regulation can be accurately identified.

[0157] In some embodiments, after controlling the liquid cooling unit to turn on the refrigeration mode if the temperature information of the battery clusters in the second battery cluster set meets the first preset condition, the temperature control method may further include but is not limited to the following:

[0158] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0159] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, where the fourth battery cluster set includes at least one of the battery clusters;

[0160] If the temperature information of the battery clusters in the fourth battery cluster set meets the second preset condition, control the liquid cooling unit to turn on the self-circulation mode;

[0161] Wherein, the second preset condition includes any one of the following:

[0162] The second maximum reference temperature is less than or equal to the fifth threshold;

[0163] The second maximum reference temperature is less than or equal to the seventh threshold, and the second reference temperature difference is greater than or equal to the eighth threshold,

[0164] Wherein, the fifth threshold is less than the seventh threshold, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0165] In some embodiments, when controlling the liquid cooling unit to turn on the refrigeration mode, battery clusters that were previously in a non-operating state may be started, and after controlling the liquid cooling unit to turn on the refrigeration mode, the temperatures of multiple battery clusters will change. Therefore, the current of each battery cluster is re-acquired every preset period, at least one battery cluster is selected from multiple battery clusters according to the current of each battery cluster to form a third battery cluster set, and the third battery cluster set is screened according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, so as to ensure that the operation mode of the liquid cooling machine is adjusted in time when the temperature control target is achieved or partially achieved, reducing energy consumption. Among them, the construction process of the third battery cluster is the same as that of the first battery cluster, and the construction process of the fourth battery cluster is the same as that of the second battery cluster. The construction processes of the first battery cluster and the second battery cluster have been described above and will not be elaborated here.

[0166] In some embodiments, when the fourth battery cluster set contains only one battery cluster, the maximum temperature of the battery cluster is used as the second maximum reference temperature, the minimum temperature of the battery cluster is used as the second minimum reference temperature, and the difference between the maximum temperature and the minimum temperature of the battery cluster is used as the second reference temperature difference; when the fourth battery cluster set contains multiple battery clusters, the average value of the maximum temperatures of the multiple battery clusters in the fourth battery cluster set is used as the second maximum reference temperature, the average value of the minimum temperatures of the multiple battery clusters in the fourth battery cluster set is used as the second minimum reference temperature, and the difference between the average value of the maximum temperatures and the average value of the minimum temperatures of the multiple battery clusters in the fourth battery cluster set is used as the second reference temperature difference.

[0167] Specifically, during the refrigeration operation of the liquid cooling unit, by periodically obtaining the current status of each battery cluster, the battery clusters still in the working state are screened out to form a third battery cluster set; further analyzing the temperature distribution of each battery cluster in the third battery cluster set, the battery cluster with the highest temperature, the lowest temperature, or the largest temperature difference is selected as the fourth battery cluster set. When the highest temperature in the fourth battery cluster set drops to the safe operation threshold, it indicates that the refrigeration demand has been met, and at this time, the self-circulation mode is triggered to reduce energy consumption; when the highest temperature has not fully reached the standard but has been significantly reduced, and at the same time the temperature difference inside the battery cluster exceeds the reasonable range, the self-circulation mode is also triggered to balance the internal temperature distribution; the dual judgment mechanism ensures that the operation mode is adjusted in a timely manner when the temperature control target is achieved or partially achieved.

[0168] In some embodiments, according to the second maximum reference temperature, the second minimum reference temperature, and the second reference temperature difference, it is determined whether the temperature information of the battery clusters in the fourth battery cluster set meets the second preset condition. If the second preset condition is met, it means that the temperatures of the battery clusters are not at a high temperature at this time, so the liquid cooler is controlled to turn on the self-circulation mode. If the second preset condition is not met, it means that the temperatures of multiple battery packs in each battery cluster are relatively high, and the liquid cooler is continuously controlled to maintain the refrigeration mode until the second preset condition is met, and then the liquid cooler is controlled to turn on the self-circulation mode.

[0169] It should be noted that the fifth threshold, the seventh threshold, the eighth threshold, and the preset period can all be set according to the actual situation and are not specifically limited here. However, it should be noted that since the maximum temperature being less than the fifth threshold indicates that the temperatures of the battery clusters are not at a high temperature at this time, the fifth threshold needs to be less than the seventh threshold when setting.

[0170] Exemplarily, as Figure 3 shown, the fifth threshold is set to 28 °C, the seventh threshold is set to 33 °C, and the eighth threshold is set to 8 °C. When the second maximum reference temperature is less than or equal to 28 °C, the liquid cooling unit is controlled to turn on the self-circulation mode; or, when the second maximum reference temperature is less than or equal to 33 °C, and the second reference temperature difference is greater than or equal to 8 °C, the liquid cooling unit is controlled to turn on the self-circulation mode; if the second maximum reference temperature or the second reference temperature difference does not meet the above conditions for turning on the self-circulation mode, the liquid cooling unit is controlled to maintain the refrigeration mode until the above conditions are met and the liquid cooling unit is controlled to turn on the self-circulation mode.

[0171] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the first state. According to the temperature information of the battery clusters in the second battery cluster set, controlling the temperatures of the multiple battery clusters may include, but is not limited to, the following:

[0172] Controlling the temperatures of a plurality of the battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes:

[0173] If the temperature information of the battery clusters in the second battery cluster set meets a third preset condition, controlling the liquid cooling unit to turn on the heating mode;

[0174] Wherein, the third preset condition is that a first minimum reference temperature is less than or equal to a second threshold value, the first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set, and the second threshold value corresponding to the first state is greater than the second threshold value corresponding to the second state.

[0175] In some embodiments, since the temperature of the battery clusters in the working state is higher than that in the non - working state, when judging low temperature, the second threshold value corresponding to the first state is greater than the second threshold value corresponding to the second state. The determination of the first minimum reference temperature has been described above and will not be elaborated here. The second threshold value can be set according to actual situations and is not specifically limited herein.

[0176] Exemplarily, as Figure 3 shown, the second threshold value in the first state is set to 16 °C, and the second threshold value in the second state is set to 12 °C. When the current state of the liquid cooling machine is the first state and the first minimum reference temperature is less than or equal to 16 °C, controlling the liquid cooling machine to turn on the heating mode to increase the temperatures of a plurality of battery clusters; when the current state of the liquid cooling machine is the second state and the first minimum reference temperature is less than or equal to 12 °C, controlling the liquid cooling machine to turn on the heating mode to increase the temperatures of a plurality of battery clusters.

[0177] In this embodiment, through dynamic threshold adjustment and precise screening of the battery clusters in the operating state, the timeliness and accuracy of battery cluster temperature compensation in a low - temperature environment are achieved, avoiding performance degradation caused by local over - cooling of the battery pack, reducing energy waste caused by ineffective heating, and considering that the self - heat generation of the battery is low in the static state of the liquid cooling unit and requires a lower heating threshold, while the battery generates more heat in the operating state and requires a higher heating threshold. That is, by establishing a threshold adjustment mechanism associated with the state, the control delay problem under low - temperature working conditions is effectively avoided.

[0178] In some embodiments, when the current state is the first state, after controlling the liquid cooling unit to turn on the heating mode if the temperature information of the battery clusters in the second battery cluster set meets the third preset condition, this temperature control method may further include but is not limited to the following:

[0179] Selecting at least one of the battery clusters from the plurality of battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0180] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, where the fourth battery cluster set includes at least one of the battery clusters;

[0181] If the temperature information of the battery clusters in the fourth battery cluster set meets a fourth preset condition, control the liquid cooling unit to turn on the self-circulation mode;

[0182] Among them, the fourth preset condition includes any one of the following:

[0183] The second minimum reference temperature is greater than or equal to a ninth threshold;

[0184] The second maximum reference temperature is greater than or equal to a tenth threshold;

[0185] Among them, the ninth threshold is less than the tenth threshold, the second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set, and the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set.

[0186] In some embodiments, when controlling the liquid cooling unit to turn on the heating mode, battery clusters that were previously in a non-operating state may be started, and after controlling the liquid cooling unit to turn on the heating mode, the temperatures of multiple battery clusters will change. Therefore, the current of each battery cluster is re-acquired every preset period, at least one battery cluster is selected from multiple battery clusters according to the current of each battery cluster to form a third battery cluster set, and the third battery cluster set is screened according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set. The above two screening processes, the second maximum reference temperature, and the second minimum reference temperature are all described above and will not be elaborated here.

[0187] It should be noted that both the ninth threshold and the tenth threshold can be set according to actual situations and are not specifically limited here. However, it should be noted that since the ninth threshold is used as the reference threshold for the second minimum reference temperature and the tenth threshold is used as the reference threshold for the second maximum reference temperature, the ninth threshold needs to be less than the tenth threshold when setting.

[0188] Exemplarily, as Figure 3 shown, the ninth threshold is set to 18 °C and the tenth threshold is set to 22 °C. When the second minimum reference temperature is greater than or equal to 18 °C, control the liquid cooling unit to turn on the self-circulation mode; or, when the second maximum reference temperature is greater than or equal to 22 °C, control the liquid cooling unit to turn on the self-circulation mode; if the second maximum reference temperature or the second minimum reference temperature does not meet the above conditions for turning on the self-circulation mode, control the liquid cooling unit to maintain the heating mode until the above conditions are met to control the liquid cooling unit to turn on the self-circulation mode.

[0189] In some embodiments, the current state is the second state. After controlling the liquid cooling unit to turn on the heating mode if the temperature information of the battery clusters in the second battery cluster set satisfies the third preset condition, the temperature control method may further include, but is not limited to, the following:

[0190] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0191] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one of the battery clusters;

[0192] If the temperature information of the battery clusters in the fourth battery cluster set satisfies the fifth preset condition, control the liquid cooling unit to turn on the standby mode;

[0193] Wherein, the fifth preset condition includes any one of the following:

[0194] The second minimum reference temperature is greater than or equal to the eleventh threshold, and the second reference temperature difference is less than the twelfth threshold;

[0195] The second maximum reference temperature is greater than or equal to the thirteenth threshold, and the second reference temperature difference is less than the twelfth threshold;

[0196] Wherein, the eleventh threshold is less than the thirteenth threshold, the second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0197] In some embodiments, the construction processes of the third battery cluster set and the fourth battery cluster set, as well as the determination processes of the second minimum reference temperature, the second reference temperature difference, and the second maximum reference temperature are all recorded above and will not be elaborated here. If the temperature information of the battery clusters in the fourth current cluster set satisfies the fifth preset condition, control the liquid cooling unit to switch from the heating mode to the standby mode. If the temperature information of the battery clusters in the fourth current cluster set does not satisfy the fifth preset condition, control the liquid cooling unit to maintain the heating mode until the fifth preset condition is satisfied and then control the liquid cooling unit to switch to the standby mode.

[0198] It should be noted that the eleventh threshold, the twelfth threshold, and the thirteenth threshold can all be set according to the actual situation and are not specifically limited here. However, it should be noted that since the eleventh threshold is the reference threshold for the second minimum reference temperature and the thirteenth threshold is the reference threshold for the second maximum reference temperature, the eleventh threshold needs to be less than the thirteenth threshold when setting.

[0199] Exemplarily, as Figure 3 shown, the eleventh threshold is set to 16 °C, the twelfth threshold is set to 4 °C, and the thirteenth threshold is set to 20 °C. When the second minimum reference temperature is greater than or equal to 16 °C and the second reference temperature difference is less than 4 °C, the liquid cooling unit is controlled to enter the standby mode; or, when the second maximum reference temperature is greater than or equal to 20 °C and the second reference temperature difference is less than 4 °C, the liquid cooling unit is controlled to enter the standby mode; if the second maximum reference temperature or the second minimum reference temperature does not meet the conditions for starting the standby mode, the liquid cooling unit is controlled to maintain the heating mode until the conditions are met to control the liquid cooling unit to enter the self-circulation mode.

[0200] In some embodiments, after obtaining the fourth battery cluster set, the temperature control method may further include but is not limited to the following:

[0201] If the temperature information of the battery clusters in the fourth battery cluster set meets the sixth preset condition, the liquid cooling unit is controlled to enter the self-circulation mode;

[0202] Wherein, the sixth preset condition includes any one of the following:

[0203] The second minimum reference temperature is greater than or equal to the eleventh threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold;

[0204] The second maximum reference temperature is greater than or equal to the thirteenth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold.

[0205] Exemplarily, as Figure 3 shown, the eleventh threshold is set to 16 °C, the twelfth threshold is set to 4 °C, and the thirteenth threshold is set to 20 °C. When the second minimum reference temperature is greater than or equal to 16 °C and the second reference temperature difference is greater than or equal to 4 °C, the liquid cooling unit is controlled to enter the self-circulation mode; or, when the second maximum reference temperature is greater than or equal to 20 °C and the second reference temperature difference is greater than or equal to 4 °C, the liquid cooling unit is controlled to enter the self-circulation mode; if the second maximum reference temperature, the second minimum reference temperature, or the second reference temperature difference does not meet the conditions for starting the self-circulation mode, the liquid cooling unit is controlled to maintain the heating mode until the conditions are met to control the liquid cooling unit to enter the self-circulation mode.

[0206] In some other embodiments, after controlling the liquid cooling unit to turn on the self - circulation mode, the temperature control method may further include, but is not limited to, the following:

[0207] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a fifth battery cluster set;

[0208] Screen the battery clusters in the fifth battery cluster set according to the temperature information of each battery cluster in the fifth battery cluster set to obtain a sixth battery cluster set, and the sixth battery cluster set includes at least one of the battery clusters;

[0209] If the temperature information of the battery clusters in the sixth battery cluster set meets the tenth preset condition, control the liquid cooling unit to turn on the standby mode, where the tenth preset condition is that the third reference temperature difference is less than the fourteenth threshold, and the third reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the sixth battery cluster set.

[0210] In some embodiments, when controlling the liquid cooling unit to turn on the self - circulation mode, it may start battery clusters that were previously in a non - working state, and after controlling the liquid cooling unit to turn on the self - circulation mode, the temperatures of multiple battery clusters will change. Therefore, re - obtain the current of each battery cluster every preset period, select at least one battery cluster from the multiple battery clusters according to the current of each battery cluster to form a fifth battery cluster set, and screen according to the temperature information of each battery cluster in the fifth battery cluster set to obtain a sixth battery cluster set. Among them, the specific construction process of the fifth battery cluster is the same as that of the first battery cluster, and the specific construction process of the sixth battery cluster is the same as that of the second battery cluster. The specific construction processes of the first battery cluster and the second battery cluster are described above and will not be repeated here.

[0211] In some embodiments, when the sixth battery cluster set contains only one battery cluster, the difference between the maximum temperature and the minimum temperature of this battery cluster is used as the third reference temperature difference; when the sixth battery cluster set contains multiple battery clusters, the difference between the average value of the maximum temperatures of the multiple battery clusters in the sixth battery cluster set and the average value of the minimum temperatures is used as the third reference temperature difference.

[0212] Exemplarily, as Figure 3 shown, the fourteenth threshold is set to 3°C. When the third reference temperature difference is less than 3°C, control the liquid cooling unit to turn on the standby mode; if the third reference temperature difference does not meet the above - mentioned condition for turning on the standby mode, control the liquid cooling unit to maintain the self - circulation mode until the above - mentioned condition is met to control the liquid cooling unit to turn on the standby mode.

[0213] In some embodiments, the temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the second state. Controlling the temperatures of multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set may include, but is not limited to, the following:

[0214] If the temperature information of the battery clusters in the second battery cluster set satisfies the seventh preset condition, then control the liquid cooling unit to turn on the refrigeration mode;

[0215] Wherein, the seventh preset condition is that the first maximum reference temperature is greater than or equal to the third threshold, and the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set.

[0216] In some embodiments, the third threshold can be set according to the actual situation and is not specifically limited herein. The first maximum reference temperature has been described above and will not be elaborated herein.

[0217] Exemplarily, as Figure 3 shown, the third threshold is set to 36 °C. When the first maximum reference temperature is greater than or equal to 36 °C, control the liquid cooler to turn on the refrigeration mode to increase the temperatures of multiple battery clusters.

[0218] In some embodiments, after controlling the liquid cooling unit to turn on the refrigeration mode if the temperature information of the battery clusters in the second battery cluster set satisfies the seventh preset condition, the temperature control method may further include, but is not limited to, the following:

[0219] Select at least one battery cluster from multiple battery clusters according to the current of each battery cluster to form a third battery cluster set;

[0220] Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one battery cluster;

[0221] If the temperature information of the battery clusters in the fourth battery cluster set satisfies the eighth preset condition, then control the liquid cooling unit to turn on the standby mode;

[0222] Wherein, the eighth preset condition includes:

[0223] The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is less than the twelfth threshold;

[0224] Wherein, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

[0225] In some embodiments, the construction processes of the third battery cluster and the fourth battery cluster, and the determination processes of the second maximum reference temperature and the second reference temperature difference are all described above, and will not be elaborated here.

[0226] It should be noted that both the fifth threshold and the eleventh threshold can be set according to the actual situation, and no specific limitation is made here.

[0227] Exemplarily, as Figure 3 shown, the fifth threshold is set to 28 °C, and the twelfth threshold is set to 4 °C. When the second maximum reference temperature is less than or equal to 28 °C and the second reference temperature difference is less than 4 °C, the liquid chiller is controlled to enter the standby mode; if the second maximum reference temperature or the second reference temperature difference does not meet the above conditions for entering the standby mode, the liquid chiller unit is controlled to maintain the refrigeration mode until the above conditions are met to control the liquid chiller unit to enter the self-circulation mode.

[0228] In some embodiments, after obtaining the fourth battery cluster set, the temperature control method may further include but is not limited to the following:

[0229] If the temperature information of the battery clusters in the fourth battery cluster set meets the ninth preset condition, the liquid chiller unit is controlled to enter the self-circulation mode;

[0230] Wherein, the ninth preset condition includes any one of the following:

[0231] The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold;

[0232] The second maximum reference temperature is less than or equal to the seventh threshold, and the second reference temperature difference is greater than or equal to the eighth threshold, the fifth threshold is less than the seventh threshold, and the eighth threshold is greater than the twelfth threshold.

[0233] In some embodiments, the fifth threshold, the twelfth threshold, the seventh threshold, and the eighth threshold can all be set according to the actual situation, and no specific limitation is made here. It should be noted that when setting, the fifth threshold needs to be less than the seventh threshold, and the eighth threshold needs to be greater than the twelfth threshold.

[0234] Exemplarily, as Figure 3As shown, the fifth threshold is set to 28°C, the twelfth threshold is set to 4°C, the seventh threshold is set to 33°C, and the eighth threshold is set to 8°C. When the second maximum reference temperature is less than or equal to 28°C and the second reference temperature difference is greater than or equal to 4°C, the liquid cooling unit is controlled to turn on the self-circulation mode; or, when the second maximum reference temperature is less than or equal to 33°C and the second reference temperature difference is greater than or equal to 8°C, the liquid cooling unit is controlled to turn on the self-circulation mode; if the second maximum reference temperature and the second reference temperature difference do not meet the above conditions for turning on the self-circulation mode, the liquid cooling unit is controlled to maintain the heating mode until the above conditions are met to control the liquid cooling unit to turn on the self-circulation mode.

[0235] In some other embodiments, after controlling the liquid cooling unit to turn on the self-circulation mode, the temperature control method may further include but is not limited to the following:

[0236] Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a fifth battery cluster set;

[0237] Screen the battery clusters in the fifth battery cluster set according to the temperature information of each battery cluster in the fifth battery cluster set to obtain a sixth battery cluster set, and the sixth battery cluster set includes at least one of the battery clusters;

[0238] If the temperature information of the battery clusters in the sixth battery cluster set meets the tenth preset condition, the liquid cooling unit is controlled to turn on the standby mode, and the tenth preset condition is that the third reference temperature difference is less than the fourteenth threshold, where the third reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the sixth battery cluster set.

[0239] In some embodiments, the specific construction process of the fifth battery cluster, the specific construction process of the sixth battery cluster, and the determination process of the third reference temperature difference have been described above and will not be repeated here.

[0240] Exemplarily, as Figure 3 shown, the fourteenth threshold is set to 3°C. When the third reference temperature difference is less than 3°C, the liquid cooling unit is controlled to turn on the standby mode; if the third reference temperature difference does not meet the above conditions for turning on the standby mode, the liquid cooling unit is controlled to maintain the self-circulation mode until the above conditions are met to control the liquid cooling unit to turn on the standby mode.

[0241] In some other embodiments, as Figure 4As shown in the figure, the cell temperature in the figure is the cell temperature of the battery cluster, that is, the temperature information of the battery cluster. The charge and discharge state is determined according to the current of the battery cluster. If the current of the battery cluster is not zero, it is considered that the battery cluster is in the charge and discharge state. If the current of the battery cluster is zero, it is considered that the battery cluster is in the non-charge and discharge state, that is, the non-working state. The current state of the liquid cooling unit includes the static state, the standby state, the refrigeration state, the heating state, and the self-circulation state, and the above temperature control method can be used to implement Figure 4 the logical judgment in, that is, to determine which mode to control the liquid cooling machine to turn on according to the above temperature control method, and to complete the temperature control of multiple battery clusters by controlling the liquid cooling machine to turn on the corresponding mode.

[0242] In addition, referring to Figure 5 , Figure 5 is a schematic diagram of the hardware structure of the electronic device provided by the embodiment of the present application. The electronic device includes:

[0243] A processor 901, which can be implemented by using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application;

[0244] A memory 902, which can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc. The memory 902 can store an operating system and other application programs. When implementing the technical solutions provided by the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 902 and are called by the processor 901 to execute the vehicle abnormal departure recognition method of the embodiments of the present application;

[0245] An input / output interface 903, which is used to implement information input and output;

[0246] A communication interface 904, which is used to implement communication interaction between this device and other devices, and can implement communication through a wired method (such as USB, network cable, etc.) or through a wireless method (such as mobile network, WIFI, Bluetooth, etc.);

[0247] A bus 905, which transmits information between various components of the device (such as the processor 901, the memory 902, the input / output interface 903, and the communication interface 904);

[0248] Among them, the processor 901, the memory 902, the input / output interface 903, and the communication interface 904 are communicatively connected to each other inside the device through the bus 905.

[0249] In addition, an embodiment of the present invention further provides an energy storage system, including:

[0250] a plurality of battery clusters; and

[0251] the electronic device in the above embodiment, each of the battery clusters includes a plurality of serially connected battery packs.

[0252] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions for causing the energy storage system to execute the temperature control method in the above embodiment, for example, execute Figure 1 the method steps S100 to step S300 in

[0253] Those of ordinary skill in the art can understand that all or some of the steps and systems disclosed in the above methods can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium or a non-transitory medium and a communication medium or a transitory medium. As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc DVD or other optical disc storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0254] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A temperature control method, characterized in that, Applied to an energy storage system, the energy storage system includes a plurality of battery clusters, and each battery cluster includes a plurality of serially connected battery packs. The method includes: Select at least one of the plurality of battery clusters according to the current of each battery cluster to form a first battery cluster set; Screen the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set, and the second battery cluster set includes at least one battery cluster; Control the temperatures of the plurality of battery clusters according to the temperature information of the battery clusters in the second battery cluster set.

2. The temperature control method according to claim 1, wherein The energy storage system further includes a liquid cooling unit, and the liquid cooling unit is used to adjust the temperatures of the plurality of battery clusters; The step of selecting at least one of the plurality of battery clusters according to the current of each battery cluster to form a first battery cluster set includes: Determine the current state of the liquid cooling unit according to the currents of the plurality of battery clusters; When the current state is the first state, select the battery clusters with currents greater than a first threshold from the plurality of battery clusters to form a first battery cluster set, and the first state is used to indicate that the liquid cooling unit is in a non - stationary state; When the current state is the second state, select all the battery clusters from the plurality of battery clusters to form a first battery cluster set, and the second state is used to indicate that the liquid cooling unit is in a stationary state.

3. The temperature control method according to claim 2, characterized in that, The temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster; The step of screening the battery clusters in the first battery cluster set according to the temperature information of each battery cluster in the first battery cluster set to obtain a second battery cluster set includes: When the minimum temperature of each battery cluster in the first battery cluster set is greater than a second threshold, and there is at least one battery cluster in the first battery cluster set whose maximum temperature is greater than or equal to a third threshold, use the battery cluster with the highest temperature in the first battery cluster set as the battery cluster in the second battery cluster set, where the second threshold is less than the third threshold; When the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, and there is at least one battery cluster in the first battery cluster set whose minimum temperature is less than or equal to the second threshold, use the battery cluster with the lowest temperature in the first battery cluster set as the battery cluster in the second battery cluster set; When the minimum temperature of each battery cluster in the first battery cluster set is greater than the second threshold, and the maximum temperature of each battery cluster in the first battery cluster set is less than the third threshold, use the battery cluster with the largest temperature difference in the first battery cluster set as the battery cluster in the second battery cluster set, and the temperature difference is the difference between the maximum temperature and the minimum temperature of the battery cluster.

4. The temperature control method according to claim 3, characterized in that The second threshold corresponding to the first state is greater than the second threshold corresponding to the second state; The third threshold corresponding to the first state is less than the third threshold corresponding to the second state.

5. The temperature control method according to claim 2, wherein The temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the first state; Controlling the temperatures of multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes: If the temperature information of the battery clusters in the second battery cluster set meets a first preset condition, controlling the liquid cooling unit to turn on the refrigeration mode; Wherein, the first preset condition includes any one of the following: The first maximum reference temperature is greater than or equal to a third threshold, and the first reference temperature difference is less than or equal to a fourth threshold; The first minimum reference temperature is greater than or equal to a fifth threshold, and the first reference temperature difference is less than or equal to the fourth threshold; The first maximum reference temperature is greater than a sixth threshold; Wherein, the sixth threshold is greater than the third threshold, the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set, the first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set, and the first reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the second battery cluster set.

6. The temperature control method according to claim 5, characterized in that After controlling the liquid cooling unit to turn on the refrigeration mode if the temperature information of the battery clusters in the second battery cluster set meets the first preset condition, the method further includes: Selecting at least one battery cluster from multiple battery clusters according to the current of each battery cluster to form a third battery cluster set; Screening the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one battery cluster; If the temperature information of the battery clusters in the fourth battery cluster set meets a second preset condition, controlling the liquid cooling unit to turn on the self-circulation mode; Wherein, the second preset condition includes any one of the following: The second maximum reference temperature is less than or equal to the fifth threshold; The second maximum reference temperature is less than or equal to a seventh threshold, and the second reference temperature difference is greater than or equal to an eighth threshold, Wherein, the fifth threshold is less than the seventh threshold, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

7. The temperature control method according to claim 2, characterized in that The temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster; Controlling the temperatures of multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes: If the temperature information of the battery clusters in the second battery cluster set meets a third preset condition, controlling the liquid cooling unit to turn on the heating mode; Wherein, the third preset condition is that the first minimum reference temperature is less than or equal to a second threshold, the first minimum reference temperature is determined according to the minimum temperature of the battery clusters in the second battery cluster set, and the second threshold corresponding to the first state is greater than the second threshold corresponding to the second state.

8. The temperature control method according to claim 7, characterized in that, The current state is the first state; If the temperature information of the battery clusters in the second battery cluster set satisfies the third preset condition, after controlling the liquid cooling unit to turn on the heating mode, the method further includes: Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set; Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one of the battery clusters; If the temperature information of the battery clusters in the fourth battery cluster set satisfies the fourth preset condition, control the liquid cooling unit to turn on the self-circulation mode; Wherein, the fourth preset condition includes any one of the following: The second minimum reference temperature is greater than or equal to the ninth threshold; The second maximum reference temperature is greater than or equal to the tenth threshold; Wherein, the ninth threshold is less than the tenth threshold, the second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set, and the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set.

9. The temperature control method according to claim 7, characterized in that, The current state is the second state; If the temperature information of the battery clusters in the second battery cluster set satisfies the third preset condition, after controlling the liquid cooling unit to turn on the heating mode, the method further includes: Select at least one of the battery clusters from the multiple battery clusters according to the current of each battery cluster to form a third battery cluster set; Screen the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one of the battery clusters; If the temperature information of the battery clusters in the fourth battery cluster set satisfies the fifth preset condition, control the liquid cooling unit to turn on the standby mode; Wherein, the fifth preset condition includes any one of the following: The second minimum reference temperature is greater than or equal to the eleventh threshold, and the second reference temperature difference is less than the twelfth threshold; The second maximum reference temperature is greater than or equal to the thirteenth threshold, and the second reference temperature difference is less than the twelfth threshold; Wherein, the eleventh threshold is less than the thirteenth threshold, the second minimum reference temperature is determined according to the minimum temperature of the battery clusters in the fourth battery cluster set, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

10. The temperature control method according to claim 9, characterized in that, After obtaining the fourth battery cluster set, the method further includes: If the temperature information of the battery clusters in the fourth battery cluster set satisfies the sixth preset condition, control the liquid cooling unit to turn on the self-circulation mode; Wherein, the sixth preset condition includes any one of the following: The second minimum reference temperature is greater than or equal to the eleventh threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold; The second maximum reference temperature is greater than or equal to the thirteenth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold.

11. The temperature control method according to claim 2, characterized in that, The temperature information of the battery cluster includes the maximum temperature and the minimum temperature of the battery cluster, and the current state is the second state; Controlling the temperatures of multiple battery clusters according to the temperature information of the battery clusters in the second battery cluster set includes: If the temperature information of the battery clusters in the second battery cluster set meets the seventh preset condition, controlling the liquid cooling unit to turn on the refrigeration mode; Wherein, the seventh preset condition is that the first maximum reference temperature is greater than or equal to the third threshold, and the first maximum reference temperature is determined according to the maximum temperature of the battery clusters in the second battery cluster set.

12. The temperature control method according to claim 11, wherein After controlling the liquid cooling unit to turn on the refrigeration mode if the temperature information of the battery clusters in the second battery cluster set meets the seventh preset condition, the method further includes: Selecting at least one battery cluster from multiple battery clusters according to the current of each battery cluster to form a third battery cluster set; Screening the battery clusters in the third battery cluster set according to the temperature information of each battery cluster in the third battery cluster set to obtain a fourth battery cluster set, and the fourth battery cluster set includes at least one battery cluster; If the temperature information of the battery clusters in the fourth battery cluster set meets the eighth preset condition, controlling the liquid cooling unit to turn on the standby mode; Wherein, the eighth preset condition includes: The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is less than the twelfth threshold; Wherein, the second maximum reference temperature is determined according to the maximum temperature of the battery clusters in the fourth battery cluster set, and the second reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the fourth battery cluster set.

13. The temperature control method according to claim 12, wherein After obtaining the fourth battery cluster set, the method further includes: If the temperature information of the battery clusters in the fourth battery cluster set meets the ninth preset condition, controlling the liquid cooling unit to turn on the self-circulation mode; Wherein, the ninth preset condition includes any one of the following: The second maximum reference temperature is less than or equal to the fifth threshold, and the second reference temperature difference is greater than or equal to the twelfth threshold; The second maximum reference temperature is less than or equal to the seventh threshold, and the second reference temperature difference is greater than or equal to the eighth threshold, the fifth threshold is less than the seventh threshold, and the eighth threshold is greater than the twelfth threshold.

14. The temperature control method according to claim 10 or 13, characterized in that, After controlling the liquid cooling unit to turn on the self-circulation mode, the method further includes: Selecting at least one battery cluster from multiple battery clusters according to the current of each battery cluster to form a fifth battery cluster set; Screening the battery clusters in the fifth battery cluster set according to the temperature information of each battery cluster in the fifth battery cluster set to obtain a sixth battery cluster set, and the sixth battery cluster set includes at least one battery cluster; If the temperature information of the battery clusters in the sixth battery cluster set satisfies the tenth preset condition, the liquid cooling unit is controlled to enter the standby mode, where the tenth preset condition is that the third reference temperature difference is less than the fourteenth threshold, and the third reference temperature difference is determined according to the difference between the maximum temperature and the minimum temperature of the battery clusters in the sixth battery cluster set.

15. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the temperature control method according to any one of claims 1 to 14.

16. An energy storage system, characterized in that, The energy storage system includes: a plurality of battery clusters; and the electronic device according to claim 15, each of the battery clusters including a plurality of serially connected battery packs.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing the energy storage system to execute the temperature control method according to any one of claims 1 to 14.

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