A cold storage and release control method and system for an immersed energy storage tank battery module

Abstract

The application discloses a kind of immersion energy storage box battery module's cold storage release control method and system, it is related to cold release control system technical field;Method includes: real-time acquisition ambient temperature point temperature value, module surface temperature point temperature value and battery module load data, obtain ambient thermal position table;To the space path of each ambient temperature point to battery module is path marked, obtain arrival order table;According to ambient thermal position table and arrival order table, each space path is divided into area, obtain stagnation heat partition table;The reachable cold quantity of each battery module is calculated, obtain reachable cold quantity table;Read the preset current power instruction and subsequent time period load arrangement, obtain load time period table;Based on load time period table and reachable cold quantity table, each battery module generates hierarchical release instruction;The application is conducive to in the cold storage release control scene of immersion energy storage box battery module, generates the release instruction matched with actual working condition.

Description

Technical Field

[0001] This invention relates to the field of cold release control system technology, and more specifically, to a cold storage and cold release control method and system for an immersion energy storage battery module. Background Technology

[0002] Immersion energy storage tanks directly exchange heat with the outer surface of the battery module through the immersion medium, thereby reducing the temperature rise of the battery module during charging and discharging. Compared with air cooling or cold plate heat exchange methods, the medium inside the immersion energy storage tank not only undertakes heat transfer but also serves as a carrier for subsequent cooling capacity. Therefore, the temperature state of the medium surrounding the battery module, its flow path, and its spatial correspondence with the battery module's position all affect the actual cooling capacity that the battery module can obtain in the current and subsequent periods.

[0003] In existing technologies, thermal management control of submerged energy storage tanks typically uses the average liquid temperature of the tank, local liquid temperature, or battery module surface temperature as the main criteria, and adjusts the circulation device in conjunction with the current load level. This approach assumes that the medium in different locations can act on the battery module approximately synchronously, or that the low-temperature medium can directly correspond to the available cooling capacity. However, in actual operation, due to the influence of the internal flow guidance structure information of the tank, the position of the battery module, the state of the circulation device, and the differences in heat generation of different battery modules, there are often stratified temperature differences, path differences, and local heat stagnation phenomena within the submerged energy storage tank. Even at the same sampling time, the order in which the medium corresponding to different peripheral liquid temperature points reaches the same battery module may be different. Although some low-temperature medium is already present, it may not be able to contact the battery module preferentially at the current time, and some medium areas adjacent to the battery module may not have effective cooling conditions due to heat retention.

[0004] Therefore, existing technologies struggle to accurately distinguish between currently prioritized cooling capacity, subsequently available cooling capacity, and cooling capacity unsuitable for current scheduling based solely on liquid temperature or surface temperature. They also fail to correlate the current thermal state with subsequent load arrangements, easily leading to errors in judging the timing of cooling release, persistent localized hotspots, and imbalances in cooling capacity allocation during subsequent high-load periods. Accurately determining the thermal potential differences, arrival order, and stagnation state of the surrounding medium in the cooling control process of submerged energy storage battery modules, and thereby improving the correspondence between cooling capacity deployment and load demand, has become a key technical problem that needs to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a method and system for controlling the cooling and releasing of battery modules in an immersion energy storage tank. This method constructs a peripheral heat potential table, an arrival sequence table, a heat stagnation zone table, an available cooling capacity table, and a load time period table. Based on the current power command and subsequent load schedules, it generates tiered cooling release commands. This achieves the goal of mapping the available cooling capacity corresponding to different spatial paths within the immersion energy storage tank to the battery module load requirements, distinguishing between currently available cooling capacity and subsequent cooling capacity values, and executing cooling and releasing control according to priority release commands, delayed release commands, and reserved cooling capacity commands. This improves the correspondence between battery module cooling release allocation and load changes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a method for controlling the cold storage and release of a battery module in an immersion energy storage box, comprising:

[0008] Peripheral liquid temperature points and module surface temperature points are set up around the immersion energy storage tank and each battery module, and the temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points, and the battery module load data are collected in real time to obtain the peripheral thermal potential table.

[0009] Based on the pre-acquired battery module location, the pre-acquired internal flow guiding structure information of the housing, and the peripheral thermal potential table, the spatial path from each peripheral liquid temperature point to the battery module is marked to obtain the arrival order table.

[0010] Based on the perimeter heat potential table and the arrival order table, each spatial path is divided into regions to obtain a heat retention zone table;

[0011] Based on the arrival order table, heat retardation zone table, temperature values ​​of each module's temperature point and battery module load data, the achievable cooling capacity of each battery module is calculated, resulting in the achievable cooling capacity table.

[0012] Read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, generate graded cooling release commands for each battery module.

[0013] Preferably, the locations of the peripheral liquid temperature points include the upper, middle, and lower layers of the immersion energy storage tank and around each battery module, and the locations of the module surface temperature points include the surface of each battery module.

[0014] When creating the peripheral thermal position table, the temperature values ​​of the peripheral liquid temperature point, the temperature values ​​of the module surface temperature point, the battery module load data, and the corresponding installation positions are written into the peripheral thermal position table.

[0015] Preferably, the step of obtaining the arrival order list includes:

[0016] The system reads the status of the circulation device, the liquid inlet position, and the liquid outlet position, retrieves the battery module position and the internal flow guiding structure information of the box, and combines the temperature values ​​of the upper, middle, and lower peripheral liquid temperature points in the peripheral thermal position table with their vertical distribution. It then marks the first arrival area, the slow arrival area, and the detour area along the spatial path through which the medium passes, forming an arrival sequence table.

[0017] Preferably, the spatial path along which the medium travels is marked segment by segment with an early arrival zone, a slow arrival zone, and a detour zone, including:

[0018] Determine the path direction from the inlet to the outlet position based on the status of the circulation device;

[0019] Based on the internal flow guidance structure information of the housing, determine the spatial path from each peripheral liquid temperature point to the battery module location.

[0020] The spatial paths from the installation location corresponding to the liquid temperature point in the same circumference to the location of the same battery module are compared sequentially to obtain the sorting results;

[0021] In the sorting results, the directly connected spatial paths that are ranked first are marked as the first-reaching zones, the spatial paths that require the most detours or traverses are marked as the detour zones, and the remaining spatial paths that can reach the battery module location are marked as the slow-reaching zones.

[0022] Preferably, the step of obtaining the heat retardation zoning table includes:

[0023] Based on the peripheral thermal level table, the temperature values ​​of each peripheral liquid temperature point and each module surface temperature point are read, and the temperature difference relationship between each peripheral liquid temperature point and each module surface temperature point is formed.

[0024] Based on the arrival order table, the medium regions along each spatial path are divided into accessible zones, delayed contact zones, and retention zones, forming a heat retention zoning table.

[0025] Preferably, the medium region along each spatial path is divided into an accessible region, a delayed contact region, and a retention region, including:

[0026] Based on the arrival order table, determine the priority zone, slow-arrival zone, or detour zone corresponding to each medium area;

[0027] The medium area located in the first zone and whose temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point is defined as the accessible zone.

[0028] The medium region located in the slow contact zone and whose temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point is defined as the delayed contact zone.

[0029] The medium area located in the bypass area is defined as the retention area;

[0030] The medium area located in the first or slow arrival zone, but whose temperature value at the peripheral liquid temperature point is not lower than the temperature value at the module surface temperature point, is defined as the stagnation zone.

[0031] Preferably, the step of obtaining the reachable cooling capacity meter includes:

[0032] Based on the heat retardation zoning table, extract the medium areas in the contactable zone where the temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point, and count the number of corresponding medium areas.

[0033] Based on the heat stagnation zoning table, extract the medium region where the temperature value of the peripheral liquid temperature point in the delayed contact zone is lower than the temperature value of the module surface temperature point, count the number of corresponding medium regions, and exclude the stagnant zone from the statistical range of the current available cooling capacity value and the continued cooling capacity value.

[0034] Based on the temperature values ​​of each module's surface temperature point at continuous sampling time for the same battery module, a trend of module surface temperature change is formed. Combined with battery module load data, the current achievable cooling capacity value and the subsequent cooling capacity value are determined and written into the achievable cooling capacity table.

[0035] Preferably, determining the currently available cooling capacity and the subsequent cooling capacity separately includes:

[0036] For the same battery module, count the total number of all media regions within the contactable area or delayed contact area, and count the number of media regions that satisfy the temperature difference relationship that the temperature value of the peripheral liquid temperature point is lower than the temperature value of the corresponding module surface temperature point.

[0037] When all media regions meet the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as high-level;

[0038] When at least one medium region satisfies the temperature difference relationship, and at least one medium region does not satisfy the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as intermediate level;

[0039] When there is no medium region that satisfies the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as low level;

[0040] Within the same level, they are sorted from largest to smallest by the difference between the temperature value of the corresponding module's surface temperature point and the temperature value of the surrounding liquid temperature point.

[0041] Preferably, the step of generating graded cooling release commands for each battery module includes:

[0042] Match the current power command with the current available cooling capacity, and match the load schedule for subsequent periods with the continued cooling capacity.

[0043] Based on the level and call order of the currently available cooling capacity and the subsequent cooling capacity, generate a command to release cooling first, a command to release cooling slowly, or a command to retain cooling capacity.

[0044] Preferably, generating a command to release cold first, a command to release cold slowly, or a command to retain cold capacity includes:

[0045] Convert the current power command to the current time period load value, and convert the subsequent time period load arrangement to the subsequent time period load value;

[0046] When the module surface temperature changes in an upward trend and the current available cooling capacity is high or medium, a first-release cooling command is generated.

[0047] When the module surface temperature changes in a stable or cooling trend, and the load value in at least one subsequent period is higher than the load value in the current period, and the subsequent cooling capacity is high or medium, a slow-release cooling command is generated.

[0048] A command to retain cooling capacity is generated when both the current available cooling capacity and the subsequent cooling capacity are at a low level, or when the load values ​​of each subsequent time period are not higher than the load value of the current time period.

[0049] Preferably, the step of generating graded cooling release commands for each battery module includes:

[0050] The current power command and subsequent load arrangement in the load period table are respectively matched with the current available cooling capacity value and the subsequent cooling capacity value in the available cooling capacity table;

[0051] Generate a cooling release command, a slow cooling release command, or a cooling retention command for each battery module, and limit each staged cooling release command to only call the spatial path corresponding to the accessible area or the delayed contact area.

[0052] Preferably, when generating graded cooling release commands for each battery module, the method further includes:

[0053] The spatial path and the position of each battery module are kept in correspondence. The spatial path corresponding to the bypass area and the spatial path corresponding to the stagnation area are excluded from the first cooling release command and the slow cooling release command. It is also prohibited to write the spatial path corresponding to one battery module into the graded cooling release command corresponding to another battery module.

[0054] Secondly, the present invention provides a cold storage and release control system for an immersion energy storage battery module, comprising:

[0055] Data acquisition module: used to set up peripheral liquid temperature points and module surface temperature points around the immersion energy storage tank and each battery module, and to collect the temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points and the battery module load data in real time to obtain the peripheral thermal potential table.

[0056] Order statistics module: Based on the pre-acquired battery module location, pre-acquired internal flow guiding structure information of the housing, and peripheral thermal position table, the spatial path from each peripheral liquid temperature point to the battery module is marked to obtain the arrival order table.

[0057] Heat retention zoning module: used to divide each spatial path into regions based on the perimeter heat potential table and arrival order table, and obtain the heat retention zoning table;

[0058] Cooling capacity statistics module: It is used to calculate the achievable cooling capacity of each battery module based on the arrival order table, heat stagnation zone table, temperature values ​​of each module's temperature point and battery module load data, and obtain the achievable cooling capacity table.

[0059] Command generation module: used to read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, it generates graded cooling release commands for each battery module.

[0060] Beneficial effects:

[0061] Compared to existing technologies, this invention does not rely solely on the average liquid temperature of the tank, local single-point liquid temperature, or the surface temperature of the target battery module for real-time temperature control. Instead, it addresses the issues of uneven temperature distribution of the medium within the immersion energy storage tank, complex flow relationships, and the potential mismatch in subsequent cooling capacity allocation. It constructs a cooling storage and release control chain, sequentially linked by a peripheral thermal potential table, an arrival order table, a heat retention zone table, an available cooling capacity table, and a load period table. By using the structured results from the previous step as the basis for subsequent processing, the spatial thermal potential differences of the medium surrounding the target battery module, the actual arrival order, the heat retention state, and the correspondence between the currently available portion and the subsequent allocated portion can be continuously determined. This reduces the risk of misjudging the nominally low-temperature medium as the current priority for allocation or prematurely consuming the cooling capacity required for subsequent periods.

[0062] By retrieving information on the battery module location and the internal flow guidance structure of the housing, and combining this with the installation location, temperature value, and circulation device status of the peripheral liquid temperature points, the spatial path from each peripheral liquid temperature point to the battery module is marked with a first-arrival zone, a slow-arrival zone, and a detour zone, forming an arrival sequence table. Furthermore, based on the temperature difference between the peripheral liquid temperature points and the module surface temperature points, and the arrival sequence table, a heat retention zoning table is formed. This transforms spatial location relationships, flow path relationships, and local heat potential relationships into directly callable structured intermediate results, thereby distinguishing the actual arrival order of the medium from different directions to the battery module and identifying the degree of heat retention in the area surrounding the battery module.

[0063] By using the arrival order table and the heat retardation zone table, combined with the number of medium areas that meet the temperature difference relationship, the corresponding temperature difference relationship, the module surface temperature change trend, and the battery module load data, the current available cooling capacity value and the subsequent cooling capacity value are determined. The current available cooling capacity value and the subsequent cooling capacity value are written into the available cooling capacity table in the order of call. This can distinguish the available cooling capacity that originally existed mixed around the battery module into the current priority call part and the subsequent call part, thereby avoiding the direct inclusion of cooling capacity that has not yet effectively reached the battery module into the current call part, or the omission of cooling capacity that has already met the priority contact conditions from the current scheduling.

[0064] By reading the current power command and the load schedule for subsequent periods to form a load schedule, and mapping the load schedule to the available cooling capacity table, a cooling release command, a slow cooling release command, or a cooling capacity retention command is generated for each battery module. This enables the cooling release control to not only respond to changes in the thermal state at the current moment, but also take into account the load changes in subsequent periods, and to allocate cooling capacity in a hierarchical and time-segmented manner, thereby improving the adaptability of the cooling release control of the submerged energy storage tank under complex operating conditions. Attached Figure Description

[0065] Figure 1 This is a flowchart of a method for controlling the cold storage and release of a battery module in an immersion energy storage box according to an embodiment of the present invention.

[0066] Figure 2 This is a flowchart of a method for obtaining an achievable cooling capacity meter according to an embodiment of the present invention;

[0067] Figure 3 This is a schematic diagram of a cold storage and release control system for an immersion energy storage battery module according to an embodiment of the present invention. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be described in detail, clearly, and completely below with reference to the accompanying drawings. It should be particularly noted that the specific embodiments described below are only for better illustrating and explaining the technical solutions of the present invention, and are intended to enable those skilled in the art to better understand and implement the present invention, and should not be construed as limiting the scope of protection of the present invention. Without departing from the spirit and substance of the present invention, those skilled in the art can modify, adjust, or make equivalent substitutions based on the content disclosed in the present invention, and these should all be considered within the scope of protection of the present invention.

[0069] Example 1

[0070] Please see Figure 1 and Figure 2 As shown, this embodiment provides a method for controlling the cold storage and release of a battery module in an immersion energy storage box, including:

[0071] Peripheral liquid temperature points and module surface temperature points are set up around the immersion energy storage tank and each battery module. The temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points, and the battery module load data are collected in real time to obtain the peripheral thermal potential table.

[0072] Among them, the peripheral liquid temperature point is the liquid temperature acquisition location deployed in the medium inside the immersion energy storage tank. The peripheral liquid temperature point is used to collect the temperature values ​​of the medium around the battery module in the upper, middle, and lower layers, as well as around the battery module. The module surface temperature point is the surface temperature acquisition location deployed on the surface of the battery module. The module surface temperature point is used to collect the temperature value at the contact point between the battery module surface and the medium. The temperature value of the peripheral liquid temperature point is used to characterize the thermal potential state of the medium around the battery module, and the temperature value of the module surface temperature point is used to characterize the thermal potential state of the battery module surface. When forming the peripheral thermal potential table, the installation location of the peripheral liquid temperature point, the temperature value of the peripheral liquid temperature point, the installation location of the module surface temperature point, the temperature value of the module surface temperature point, the battery module position, and the battery module load data are written into the peripheral thermal potential table at the same sampling time.

[0073] The method for collecting the temperature values ​​of the module surface temperature points is as follows: Before the immersion energy storage tank is put into cold storage and release control, the thermal management controller uniformly sets the sampling period, and makes the temperature values ​​of the module surface temperature points, the temperature values ​​of the peripheral liquid temperature points, and the battery module load data use the same sampling period; according to the sampling period, the surface temperature points of each battery module are continuously read, and the temperature values ​​of multiple surface temperature points corresponding to the same battery module are synchronously collected at each sampling time; when a battery module surface corresponds to multiple surface temperature points, the temperature values ​​of multiple surface temperature points are retained separately and recorded together with the corresponding installation positions, so that the temperature values ​​of each surface temperature point can reflect the thermal potential distribution at different positions on the battery module surface; after completing the reading of the temperature values ​​of each surface temperature point, the temperature values ​​of each surface temperature point are time-aligned with the temperature values ​​of the peripheral liquid temperature points corresponding to the same sampling time, and written into the peripheral thermal potential table.

[0074] The method for collecting the temperature values ​​of the peripheral liquid temperature points is as follows: Following a uniformly set sampling period, the peripheral liquid temperature points deployed around the upper, middle, and lower layers of the submerged energy storage tank, as well as around each battery module, are continuously read. The temperature values ​​of each peripheral liquid temperature point are synchronously collected at each sampling moment. To ensure that the temperature values ​​of the peripheral liquid temperature points reflect the liquid temperature distribution around different layers and battery modules within the submerged energy storage tank, the installation positions corresponding to each peripheral liquid temperature point are fixedly marked during the collection process, and the temperature values ​​of each peripheral liquid temperature point are recorded along with their corresponding installation positions. When multiple peripheral liquid temperature points correspond to the same battery module, the temperature values ​​of each peripheral liquid temperature point are retained separately to form a record of the peripheral liquid temperature distribution around the battery module.

[0075] The method for acquiring battery module load data is as follows: Under a sampling period consistent with the temperature values ​​of the peripheral liquid temperature point and the module surface temperature point, the corresponding operating data of each battery module is read, and battery module load data is formed based on the information representing the charging state, discharging state, current output power, current input power, and power call state in the operating data. The battery module load data is written into the peripheral thermal table using the battery module location and sampling time as indexes. The temperature values ​​of the peripheral liquid temperature points are written into the peripheral thermal table using the installation location and sampling time of the peripheral liquid temperature points as indexes. The temperature values ​​of the module surface temperature points are written into the peripheral thermal table using the installation location of the module surface temperature points, the battery module location, and the sampling time as indexes. Thermal position table; when the peripheral thermal position table is invoked, data at the same sampling time is read first, and then the battery module load data is matched with the temperature values ​​of the peripheral liquid temperature points around the corresponding battery module and the temperature values ​​of the module surface temperature points on the corresponding battery module surface according to the battery module position; the battery module load data is used to characterize the load state that the battery module has formed at the current sampling time, and the current power command and subsequent time period load arrangement are used to characterize the power scheduling requirements of the current time period and subsequent time period that the control system is preparing to execute. The battery module load data provides the current load basis for generating the reachable cooling capacity table, and the current power command and subsequent time period load arrangement provide the scheduling basis for generating the load time period table.

[0076] By acquiring the peripheral thermal potential table, the liquid temperature distribution at different levels inside the immersion energy storage tank, the thermal potential distribution on the surface of the battery module, and the corresponding load status of the battery module can be recorded at the same sampling time. This establishes a directly callable positional and temporal association between the peripheral liquid temperature points, module surface temperature points, and battery module load data. Based on this, when marking spatial paths, the thermal potential relationship between the upper, middle, and lower layers and around each battery module can be directly determined based on the peripheral thermal potential table. This further supports the generation of arrival order tables, heat retardation zoning tables, and reachable cooling capacity tables, thus providing a unified data foundation for determining graded cooling release commands.

[0077] Based on the pre-acquired battery module locations, pre-acquired internal airflow structure information, and peripheral thermal potential table, the spatial paths from each peripheral liquid temperature point to the battery module are marked to obtain an arrival order table, specifically including:

[0078] The system reads the status of the circulation device, the liquid inlet position, and the liquid outlet position, retrieves the battery module position and the internal flow guiding structure information of the box, and combines the temperature values ​​of the upper, middle, and lower peripheral liquid temperature points in the peripheral thermal position table with their vertical distribution. It then marks the first arrival area, the slow arrival area, and the detour area along the spatial path through which the medium passes, forming an arrival sequence table.

[0079] The medium is a liquid medium that flows around each battery module and participates in heat exchange inside the immersion energy storage tank. Under the combined effect of the circulation device status, liquid inlet position, liquid outlet position, and internal flow guiding structure information, the medium flows along the spatial path from each peripheral liquid temperature point to the battery module. During the flow process, the medium forms a corresponding relationship with each peripheral liquid temperature point, module surface temperature point, and battery module position, and serves as a unified flow object in the peripheral heat potential table, arrival order table, heat retardation zone table, and reachable cold capacity table. By defining the medium as the liquid medium that participates in flow and heat exchange inside the immersion energy storage tank, the subsequent division of spatial path, medium area, first arrival area, slow arrival area, and bypass area can all be based on the same object.

[0080] The circulation device status is used to characterize the circulation drive status of the medium in the submerged energy storage tank at the current moment. The circulation device status includes the start / stop status, circulation direction, and operating strength of the circulation device. The start / stop status of the circulation device is determined based on the circulation device control signal or operation feedback. The circulation direction is determined based on the corresponding medium delivery direction of the circulation device. The operating strength is determined based on the corresponding speed information, gear information, or flow feedback information of the circulation device. When the flow feedback information is not collected, the operating strength is determined based on the speed information of the circulation device. When neither the flow feedback information nor the speed information is collected, the operating strength is determined based on the gear information of the circulation device. The operating strength is used to judge the difference in the order in which the medium passes through the spatial path along the path direction. The operating strength does not change the correspondence between the liquid inlet position, liquid outlet position, and circulation direction.

[0081] The liquid inlet position is the entrance position where the medium enters the immersion energy storage tank and begins to flow along the internal guide structure of the tank. The liquid inlet position is predetermined based on the installation position of the liquid inlet and is recorded in correspondence with the internal position of the immersion energy storage tank.

[0082] The liquid outlet position is the outlet position where the medium leaves the interior of the submerged energy storage tank. The liquid outlet position is predetermined based on the installation position of the liquid outlet and is recorded in correspondence with the position inside the submerged energy storage tank.

[0083] The battery module position refers to the installation position data of each battery module inside the immersion energy storage box. The battery module position includes the layer distribution and spatial arrangement relationship of each battery module. The battery module position is recorded based on the actual installation results after the battery module assembly is completed.

[0084] The internal flow guiding structure information of the box is structural information used to characterize the flow boundary and flow guiding relationship of the medium inside the submerged energy storage box. The internal flow guiding structure information of the box includes the distribution of baffle structure, flow guiding structure, connecting channel, turning channel and flow gap. The internal flow guiding structure information of the box is pre-established based on the internal structural layout of the submerged energy storage box and corresponds to the liquid inlet position, liquid outlet position and battery module position.

[0085] The steps of marking the arrival zone, slow arrival zone, and detour zone segment by segment along the spatial path traversed by the medium include:

[0086] The path direction from the liquid inlet to the liquid outlet is determined based on the status of the circulation device; the spatial path from each peripheral liquid temperature point to the battery module is determined based on the internal flow guiding structure information of the box; for the spatial paths from the installation position corresponding to the liquid temperature point in the same peripheral area to the same battery module position, the connection mode, the number of layer switching sections, the temperature value of the peripheral liquid temperature point that first passes through the layer, and the number of sections passed through are compared in sequence to obtain the sorting result; the directly connected spatial path that is ranked first is marked as the first-reaching area, the spatial path that needs to be detoured or passes through the most sections is marked as the detour area, and the remaining spatial paths that can reach the battery module position are marked as the slow-reaching area.

[0087] The vertical distribution of temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers of the peripheral thermal potential table refers to the temperature relationship formed by reading the corresponding peripheral liquid temperature points of the upper, middle, and lower layers of the submerged energy storage tank according to the installation order of the upper, middle, and lower layers at the same sampling time. The vertical distribution of temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers of the peripheral thermal potential table is used to reflect the thermal potential difference of the medium in different layers inside the submerged energy storage tank. When there is a difference in the temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers, the vertical thermal potential distribution direction of the medium is identified according to the temperature value relationship of the corresponding layers. When the temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers are close, the corresponding layer relationship is retained according to the installation order of the upper, middle, and lower layers, and the order of each spatial path is further determined by combining the path direction.

[0088] By determining the vertical distribution of temperature values ​​at the upper, middle, and lower layers of the peripheral liquid temperature table as the arrangement of temperature values ​​at different layers at the same sampling time, the sorting of each spatial path can be determined not only by the path direction from the liquid inlet to the liquid outlet, but also by the thermal potential distribution of the medium between the upper, middle, and lower layers. On this basis, the markings of the first-arrival zone, the slow-arrival zone, and the detour zone can simultaneously correspond to the connectivity of the spatial paths and the vertical thermal potential distribution, thus providing a consistent basis for forming the arrival order table.

[0089] The steps for determining the path direction from the inlet to the outlet position based on the status of the circulation device include:

[0090] The circulation direction and operating strength of the circulation device are read, and the direction of medium flow from the inlet to the outlet position inside the submerged energy storage tank is determined according to the circulation direction. When the circulation device status indicates that the circulation device is in operation, the path direction is determined according to the direction from the inlet position to the outlet position. When the operating strength corresponding to the circulation device status decreases, the path direction is further corrected by combining the vertical distribution of the temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers of the peripheral thermal level table. The correction method is as follows: the overall direction from the inlet position to the outlet position is retained first, and the spatial path is adjusted according to the temperature value relationship of the peripheral liquid temperature points in the upper, middle, and lower layers, so that the path direction reflects both the circulation device status and the peripheral thermal level table.

[0091] The steps for determining the spatial path from each peripheral liquid temperature point to the battery module location based on the internal flow guidance structure information of the housing include:

[0092] Based on the connectivity between the installation positions of each peripheral liquid temperature point and the corresponding battery module positions, the distribution of connecting channels, partition structures, turning channels, and flow gaps in the internal flow guidance structure information of the enclosure are read. The connecting routes from each peripheral liquid temperature point to the battery module position are searched segment by segment along the path direction. When there is one connecting route between each peripheral liquid temperature point and the battery module position, the connecting route is determined as a spatial path. When there are multiple connecting routes between each peripheral liquid temperature point and the battery module position, the multiple connecting routes are retained as spatial paths respectively, and the corresponding sections of connecting channel distribution, turning channel distribution, and layer switching sections between the upper, middle, and lower layers are recorded for each spatial path.

[0093] Among them, the corresponding section of the connecting channel distribution is the channel section in the internal flow guiding structure information of the box that allows the medium to pass continuously along the path direction. The corresponding section of the connecting channel distribution is determined according to the order of the connecting channels on the spatial path and is used to characterize the part of the spatial path that can be passed continuously without bypassing the distribution of the partition structure; the corresponding section of the turning channel distribution is the channel section in the internal flow guiding structure information of the box that causes the flow direction of the spatial path to change; the layer switching section is the channel section in the internal flow guiding structure information of the box that causes the layer of the spatial path to change between the upper, middle and lower layers; based on the above recording results, a set of spatial paths from each peripheral liquid temperature point to the battery module position is formed.

[0094] The steps for sorting the order of the spatial paths include:

[0095] For each spatial path from the same peripheral liquid temperature point to the same battery module location, record the connectivity, turning channel distribution, number of layer switching sections, temperature value of the peripheral liquid temperature point first passed through the layer, and number of sections traversed. The connectivity means that the direction from the liquid inlet position to the battery module location can be reached by passing through the connecting channel distribution, or it may require passing through the turning channel distribution, layer switching sections, or bypassing the partition structure distribution. The number of sections traversed is the total number of connecting channel distribution sections, turning channel distribution sections, and layer switching sections that the same spatial path passes through sequentially from the peripheral liquid temperature point installation position to the battery module location.

[0096] During the sorting process, the connectivity is compared first. Spatial paths that can be reached through connecting channels are ranked before those that require traversing turning channels, level switching sections, or bypassing obstruction structures. If the connectivity is the same, the number of level switching sections is compared, with spatial paths having fewer level switching sections ranked before those having more. If the number of level switching sections is the same, the temperature values ​​of the peripheral liquid temperature points of the first level are compared, with spatial paths having lower peripheral liquid temperature values ​​ranked before those having higher. If the temperature values ​​of the peripheral liquid temperature points of the first level are the same, the number of sections traversed is compared, with spatial paths having fewer sections ranked before those having more. After completing the above comparisons, the sorting results for each spatial path are formed.

[0097] The number of layer-switching segments is the number of times the same spatial path enters another layer along the path direction. The number of layer-switching segments is obtained by statistically analyzing the records of the spatial path passing through the upper, middle and lower layers. When the spatial path always extends within the same layer, the number of layer-switching segments is recorded as zero. When the spatial path passes through two or more layers in sequence, the number of layer-switching segments is recorded once for each layer change.

[0098] The steps for marking each spatial path as an early arrival zone, a slow arrival zone, or a detour zone based on the sorting results include:

[0099] For a set of spatial paths from the same liquid temperature point to the same battery module location, the first path in the sorted results that can reach the battery module location via connected channels is marked as the first-reach area; the last path in the sorted results that requires bypassing obstructions, flowing away from the battery module location before returning, or traversing the most segments in the same set of spatial paths is marked as the detour area; and spatial paths in the same set that are neither marked as first-reach areas nor detour areas but can reach the battery module location are marked as the first-reach areas. The spatial path is marked as a slow-reaching zone. When there is only one spatial path in the same set of spatial paths, and the spatial path can reach the battery module location through the connecting channel, the single spatial path is marked as a first-reaching zone. When there is only one spatial path in the same set of spatial paths, and the single spatial path needs to bypass the distribution of the partition structure or needs to flow away from the battery module location before returning to the battery module location, the single spatial path is marked as a detour zone. After marking, the installation location of the peripheral liquid temperature point, the battery module location, the path direction, and the segment marking corresponding to each spatial path are written into the arrival order table.

[0100] By obtaining the arrival order table, the spatial path from each peripheral liquid temperature point to the battery module can be transformed from a simple positional connectivity relationship into a path marking result with an arrival order relationship, so that the arrival order of the medium corresponding to different peripheral liquid temperature points and the position of the battery module can be clearly correlated. On this basis, the first-arrival zone, the slow-arrival zone, and the detour zone can be further distinguished, providing a path basis for subsequent execution of heat stagnation zoning based on the peripheral thermal potential table, calculation of achievable cooling capacity based on the arrival order table and the heat stagnation zoning table, and generation of graded cooling release commands based on the achievable cooling capacity table.

[0101] Based on the perimeter heat potential table and arrival order table, the spatial paths are divided into regions to obtain a heat retention zoning table, which specifically includes:

[0102] Based on the peripheral heat potential table, the temperature values ​​of each peripheral liquid temperature point and each module surface temperature point are read, and the temperature difference relationship between each peripheral liquid temperature point and each module surface temperature point is formed; based on the arrival order table, the medium area on each spatial path is divided into contact area, delayed contact area and retention area, forming a heat retention partition table.

[0103] The medium region is the medium distribution segment on each spatial path corresponding to the installation position of the peripheral liquid temperature point, the position of the battery module, and the section through which the spatial path passes. The medium region is identified along the extension direction of the spatial path and assigned according to the connectivity relationship from the peripheral liquid temperature point to the battery module position. Each medium region corresponds to a specific spatial path. By dividing each spatial path into multiple medium regions, the temperature difference relationship in the peripheral thermal position table and the path segment marking in the arrival order table can be correlated on the same basis, thus providing a regional basis for subsequently dividing the medium region on each spatial path into accessible area, delayed contact area, and retention area.

[0104] The steps to establish the temperature difference relationship between the liquid temperature points of each perimeter and the surface temperature points of each module include:

[0105] Based on the peripheral thermal potential table, the temperature values ​​of each peripheral liquid temperature point, the temperature values ​​of each module surface temperature point, and their corresponding installation positions are read at the same sampling time. The peripheral liquid temperature points around the same battery module are then matched with the module surface temperature points on the same battery module surface according to the battery module's location. When the peripheral liquid temperature point and the module surface temperature point are on the same side of the same battery module, the module surface temperature point on that side is designated as the corresponding module surface temperature point. When multiple module surface temperature points exist on the same side, the module surface temperature point closest to the installation position of the peripheral liquid temperature point is designated as the corresponding module surface temperature point. If no module surface temperature point is located on the side where the peripheral liquid temperature point is located... The module surface temperature point closest to the installation position of the peripheral liquid temperature point on the same battery module surface is determined as the corresponding module surface temperature point. For each peripheral liquid temperature point and each module surface temperature point, the temperature values ​​of the peripheral liquid temperature point and the module surface temperature point are compared to form a temperature difference relationship where the temperature value of the peripheral liquid temperature point is lower than that of the module surface temperature point, or the temperature value of the peripheral liquid temperature point is not lower than that of the module surface temperature point. Then, each peripheral liquid temperature point, each module surface temperature point, the corresponding installation position, and the corresponding temperature difference relationship are written into the peripheral thermal position table so that the temperature difference relationship at the same sampling time can be directly called when dividing the medium area in subsequent spatial paths.

[0106] The steps for dividing the medium region along each spatial path into an accessible region, a delayed contact region, and a retention region include:

[0107] Based on the arrival order table, determine the corresponding first-arrival zone, slow-arrival zone, or detour zone for each medium area; determine the medium area located in the first-arrival zone where the temperature value of the surrounding liquid temperature point is lower than the temperature value of the module surface temperature point as the contactable zone; determine the medium area located in the slow-arrival zone where the temperature value of the surrounding liquid temperature point is lower than the temperature value of the module surface temperature point as the delayed contact zone; determine the medium area located in the detour zone as the stagnant zone; determine the medium area located in the first-arrival zone or slow-arrival zone where the temperature value of the surrounding liquid temperature point is not lower than the temperature value of the module surface temperature point as the stagnant zone.

[0108] The steps for determining the priority zone, slow-arrival zone, or detour zone for each medium area based on the arrival order table include:

[0109] Based on the arrival order table, the spatial path from each peripheral liquid temperature point to the battery module location and the corresponding segment markers of each spatial path are read. The spatial path and segment of each medium region are identified according to the order of passage along the path direction. Specifically, when the segment marker corresponding to the segment of each medium region is the first-arrival zone, each medium region is identified as the medium region of the corresponding first-arrival zone; when the segment marker corresponding to the segment of each medium region is the slow-arrival zone, each medium region is identified as the medium region of the corresponding slow-arrival zone; when the segment marker corresponding to the segment of each medium region is the detour zone, each medium region is identified as the medium region of the corresponding detour zone. After completing the above correspondence, the correspondence between each medium region and the first-arrival zone, slow-arrival zone, or detour zone is written into the heat retardation zoning table.

[0110] The reason for dividing the medium regions along each spatial path into accessible zones, delayed contact zones, and stagnant zones is that when the spatial path corresponding to the first-reaching zone arrives earlier in the arrival sequence list, and the temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point, it indicates that the corresponding medium region has reached the battery module location first along the current spatial path and has the conditions to form a temperature difference exchange with the battery module surface. Therefore, the corresponding medium region is identified as an accessible zone. Similarly, when the spatial path corresponding to the delayed-reaching zone can reach the battery module location, but its arrival sequence is after the first-reaching zone, and the temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point, it indicates that... The corresponding medium region still has the conditions to participate in subsequent temperature difference exchange, so the corresponding medium region is identified as the delayed contact region; the spatial path of the bypass region arrives later and the spatial path passes through relatively circuitous sections. Even if the corresponding medium region can eventually approach the battery module position along the spatial path, it is not considered as a medium region that participates in temperature difference exchange first, so the corresponding medium region is identified as the stagnation region; when it is located in the first-arrival region or the slow-arrival region but the temperature value of the peripheral liquid temperature point is not lower than the temperature value of the module surface temperature point, the corresponding medium region does not have the basis to participate in the release of cold according to the current temperature difference relationship, so the corresponding medium region is also identified as the stagnation region.

[0111] After obtaining the heat stagnation zoning table, the temperature difference relationship in the peripheral heat potential table can be combined with the spatial path sequence relationship in the arrival order table. This allows the medium regions on each spatial path to no longer simply retain connectivity, but to be further divided into accessible regions, delayed access regions, and stagnation regions. Based on this, when calculating the achievable cooling capacity, the heat stagnation zoning table can be used to distinguish the medium regions that can be called first, the medium regions that can be called later, and the medium regions that do not participate in the current call. This further supports the generation of the current achievable cooling capacity value, the subsequent cooling capacity value, and the staged cooling release command.

[0112] Based on the arrival sequence table, heat retardation zone table, temperature values ​​of each module's temperature points, and battery module load data, the achievable cooling capacity of each battery module is calculated, resulting in an achievable cooling capacity table, which specifically includes:

[0113] Based on the heat stagnation zoning table, extract the medium regions within the accessible zone whose peripheral liquid temperature points are lower than the module surface temperature points, and count the number of corresponding medium regions. Based on the heat stagnation zoning table, extract the medium regions within the delayed contact zone whose peripheral liquid temperature points are lower than the module surface temperature points, and count the number of corresponding medium regions. Exclude the stagnant zone from the statistical range of the current available cooling capacity and the subsequent cooling capacity. Based on the temperature values ​​of each module surface temperature point corresponding to the continuous sampling time of the same battery module, form the module surface temperature change trend, and combine it with the battery module load data to determine the current available cooling capacity and the subsequent cooling capacity, and write them into the available cooling capacity table.

[0114] The steps for determining the current available cooling capacity and the subsequent cooling capacity include:

[0115] Both the current achievable cooling capacity value and the subsequent cooling capacity value are level-based results, and both include high, medium, and low levels. The number of media regions within the accessible area corresponding to the same battery module that satisfy the temperature difference relationship is counted, and the temperature value of the peripheral liquid temperature point corresponding to the media region satisfying the temperature difference relationship is read, along with the temperature value of the corresponding module surface temperature point. Satisfying the temperature difference relationship means that the temperature value of the peripheral liquid temperature point is lower than the temperature value of the corresponding module surface temperature point. Based on the number of media regions within the accessible area corresponding to the same battery module that satisfy the temperature difference relationship, the results corresponding to the accessible area are divided into high, medium, and low levels to determine the current achievable cooling capacity value.

[0116] The number of medium regions that satisfy the temperature difference relationship within the delayed contact area corresponding to the same battery module is counted, and the temperature difference relationship between the temperature value of the corresponding peripheral liquid temperature point and the temperature value of the module surface temperature point is read. According to the number of medium regions that satisfy the temperature difference relationship within the delayed contact area corresponding to the same battery module, the results corresponding to the delayed contact area are divided into high-level, medium-level and low-level, and the continuing cooling capacity value is determined.

[0117] Exclude the stagnant zone from the current available cooling capacity and the subsequent cooling capacity; determine the order of calling the current available cooling capacity and the subsequent cooling capacity based on the module surface temperature change trend and battery module load data.

[0118] In some embodiments, the step of determining the currently available cooling capacity includes:

[0119] First, count the number of all media regions within the accessible area for the same battery module, and then count the number of media regions within the accessible area that satisfy the temperature difference relationship. When all media regions within the accessible area satisfy the temperature difference relationship, the current achievable cooling capacity value is determined to be high-level. When at least one media region within the accessible area satisfies the temperature difference relationship and at least one media region does not satisfy the temperature difference relationship, the current achievable cooling capacity value is determined to be medium-level. When no media region within the accessible area satisfies the temperature difference relationship, the current achievable cooling capacity value is determined to be low-level. When the current achievable cooling capacity value is determined to be at the same level, read the temperature difference relationship corresponding to the media regions that satisfy the temperature difference relationship, and use the difference between the temperature value of the corresponding module surface temperature point and the temperature value of the peripheral liquid temperature point as the sorting criterion within the same level, with media regions with larger differences ranked before those with smaller differences. Write the level of the current achievable cooling capacity value and the sorting results within the same level into the achievable cooling capacity table.

[0120] In some embodiments, the step of determining the continuing cooling capacity value includes:

[0121] First, count the number of all dielectric regions within the delayed contact area for the same battery module, and count the number of dielectric regions within the delayed contact area that satisfy the temperature difference relationship. When all dielectric regions within the delayed contact area satisfy the temperature difference relationship, the continued cooling capacity value is determined to be high-level. When at least one dielectric region within the delayed contact area satisfies the temperature difference relationship and at least one dielectric region does not satisfy the temperature difference relationship, the continued cooling capacity value is determined to be medium-level. When there are no dielectric regions within the delayed contact area that satisfy the temperature difference relationship, the continued cooling capacity value is determined to be low-level. When the continued cooling capacity values ​​are determined to be at the same level, read the temperature difference relationship corresponding to the dielectric regions that satisfy the temperature difference relationship, and use the difference between the temperature value of the corresponding module surface temperature point and the temperature value of the peripheral liquid temperature point as the sorting basis within the same level, with the dielectric region with the larger difference ranked before the dielectric region with the smaller difference. Write the level of the continued cooling capacity value and the sorting results within the same level into the reachable cooling capacity table.

[0122] In some embodiments, the order of calling the currently available cooling capacity value and the subsequent cooling capacity value is determined based on the module surface temperature change trend and battery module load data, including:

[0123] First, read the module surface temperature change trend for the same battery module, and then read the battery module load data for the same battery module at the current sampling time. When the module surface temperature change trend is an upward trend, and the battery module load data indicates that the load at the current sampling time is either increasing or maintaining the current load state, the currently available cooling capacity value is determined to be called first, and the subsequent cooling capacity value is determined to be called later. When the module surface temperature change trend is a stable trend, and the battery module load data indicates that there is still a load maintenance or load increase arrangement, the calling order of the currently available cooling capacity value first and the subsequent cooling capacity value second is maintained. When the module surface temperature change trend is a downward trend, and the battery module load data indicates the subsequent load arrangement... If the available cooling capacity is not higher than the current load schedule, the current available cooling capacity value is kept as the priority call value, and the subsequent cooling capacity value is reserved for subsequent call. When the current available cooling capacity value is high or medium, and the subsequent cooling capacity value is also high or medium, the current available cooling capacity value and the subsequent cooling capacity value are written into the available cooling capacity table in the order of priority. When only one of the current available cooling capacity value and the subsequent cooling capacity value is high or medium, the one in high or medium is determined as the priority call value, and the other is determined as the subsequent call value. When both the current available cooling capacity value and the subsequent cooling capacity value are low, both the current available cooling capacity value and the subsequent cooling capacity value are kept in the non-priority call order for further determination when generating graded cooling release instructions in combination with the load time table.

[0124] The steps to establish a trend in module surface temperature changes include:

[0125] Based on the perimeter thermal table, the temperature values ​​of each module's surface temperature point corresponding to the same battery module are read sequentially over time. The temperature values ​​of each module's surface temperature point at the current sampling time are compared point by point with those at the previous sampling time. When the temperature value of a module's surface temperature point at the current sampling time is higher than that at the previous sampling time, the same module's surface temperature point is recorded as an increasing module surface temperature point. When the temperature value of a module's surface temperature point at the current sampling time is lower than that at the previous sampling time, the same module's surface temperature point is recorded as a decreasing module surface temperature point. When the temperature value of a module's surface temperature point at the current sampling time is equal to that at the previous sampling time... When calculating the temperature value, the same module surface temperature point is recorded as a constant module surface temperature point; when the number of rising module surface temperature points is greater than the number of falling module surface temperature points and the number of constant module surface temperature points, the module surface temperature change trend is determined to be a rising trend; when the number of falling module surface temperature points is greater than the number of rising module surface temperature points and the number of constant module surface temperature points, the module surface temperature change trend is determined to be a falling trend; when there is no single record with the highest number among the number of rising module surface temperature points, the number of falling module surface temperature points, and the number of constant module surface temperature points, the module surface temperature change trend is determined to be a stable trend; the formed module surface temperature change trend and the corresponding battery module position are written into the reachable cooling capacity table.

[0126] After obtaining the available cooling capacity table, it is possible to uniformly correspond the spatial path sequence in the arrival order table, the regional division results in the heat stagnation zoning table, the number of medium regions, the temperature difference relationship, the module surface temperature change trend, and the battery module load data, so that the current available cooling capacity value and the subsequent cooling capacity value form results with level classification basis and calling order basis respectively; on this basis, when generating graded cooling release commands based on the load time table, the available cooling capacity table can be directly called to distinguish the priority calling part and the subsequent calling part, thus providing a consistent data basis for the generation of first cooling release command, slow cooling release command, and reserved cooling capacity command.

[0127] Read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, generate graded cooling release commands for each battery module.

[0128] The steps to obtain the load time table by reading the preset current power command and subsequent time period load arrangement include:

[0129] The system reads the preset current power command and subsequent time period load arrangement, and organizes them according to the battery module location. The current power command represents the power call requirement of the corresponding battery module at the current moment, and the subsequent time period load arrangement represents the load call order and load duration of the corresponding battery module in the subsequent time period. The current power command, subsequent time period load arrangement, and corresponding battery module location are then written into the same record in chronological order to form a load time period table. The load time period table retains at least the correspondence between the battery module location, the current power command, and the subsequent time period load arrangement for subsequent reference to the available cooling capacity table.

[0130] The steps for generating tiered cooling release commands for each battery module based on the load period table and available cooling capacity table include:

[0131] The current power command in the load period table is mapped to the current available cooling capacity value in the available cooling capacity table, and the subsequent period load arrangement in the load period table is mapped to the subsequent cooling capacity value in the available cooling capacity table. Based on the level and calling order of the current available cooling capacity value and the subsequent cooling capacity value, a first-release cooling command, a slow-release cooling command, or a reserved cooling capacity command is generated for each battery module. The first-release cooling command, the slow-release cooling command, and the reserved cooling capacity command all include the battery module location, the spatial path identifier participating in the cooling release scheduling, the corresponding accessible area or delayed contact area identifier, the result of the circulation device operation strength adjustment, and the command effective period. When generating graded cooling release commands for each battery module, only the spatial path corresponding to the accessible area or delayed contact area is used as the path source for participating in the cooling release scheduling, and the spatial path corresponding to the stagnant area is excluded from the path source for participating in the cooling release scheduling.

[0132] In some embodiments, the method of mapping the current power command in the load time period table to the current available cooling capacity value in the available cooling capacity table, and mapping the subsequent time period load arrangement in the load time period table to the follow-up cooling capacity value in the available cooling capacity table includes:

[0133] First, read the current power command and subsequent time period load arrangement from the load time period table according to the battery module location; then, read the current available cooling capacity value and subsequent cooling capacity value from the available cooling capacity table according to the same battery module location; convert the current power command into the current time period load value, and convert the subsequent time period load arrangement into the corresponding subsequent time period load value; the current time period load value and subsequent time period load value are determined based on the power dispatch data issued by the energy management unit of the energy storage system; map the current time period load value with the current available cooling capacity value, so that the current time period load value corresponds to the cooling capacity portion that can participate in the cooling release dispatch at the current moment; map the subsequent time period load value with the subsequent cooling capacity value, so that the subsequent time period load value corresponds to the cooling capacity portion that can participate in the cooling release dispatch in the subsequent time period; when the current time period load value, subsequent time period load value, current available cooling capacity value, and subsequent cooling capacity value corresponding to the same battery module are mapped, write the mapping result into the tiered cooling release command.

[0134] In some embodiments, the step of generating a pre-release cooling command, a slow-release cooling command, or a retain cooling capacity command includes:

[0135] When the module surface temperature trend is upward and the current available cooling capacity is high or medium, a priority cooling release command is generated, and the spatial path corresponding to the accessible area is used as the path source for participating in cooling release scheduling. When the module surface temperature trend is stable or downward, at least one subsequent time period has a load value higher than the current time period load value, and the subsequent cooling capacity is high or medium, a slow cooling release command is generated, and the spatial path corresponding to the delayed contact area is used as the path source for participating in cooling release scheduling. When both the current available cooling capacity and the subsequent cooling capacity are low, or when the subsequent time period load values ​​in the subsequent time period load arrangement are not higher than the current time period load value, a cooling capacity retention command is generated, and the spatial paths corresponding to the current accessible area and the delayed contact area are not used as the path source for priority cooling release scheduling during the command's effective period.

[0136] The reason for the above processing is that the module surface temperature change trend, the current available cooling capacity value, the continuing cooling capacity value, the current power command, and the load arrangement for subsequent periods correspond to the current thermal status of the battery module, the cooling capacity that can be prioritized at the current moment, the cooling capacity that can be continued to be called in subsequent periods, and the current and subsequent load requirements, respectively. When the module surface temperature change trend is an upward trend, it indicates that the thermal status corresponding to the surface of the battery module has a continuing upward direction. At this time, if the current available cooling capacity value is high or medium, it means that the number of medium areas and the temperature difference relationship corresponding to the contact area can support the priority call at the current moment. Therefore, a cooling release command is generated first, so that the current available cooling capacity value corresponds to the current power command first.

[0137] When the module surface temperature changes steadily or decreases, the current cooling demand is not primarily prioritized for immediate release. However, if at least one subsequent period's load arrangement is higher than the current power command's load arrangement, and the follow-up cooling capacity value is high or medium, it indicates that the medium area corresponding to the delayed contact zone still has the conditions for continued cooling release in subsequent periods. Therefore, a slow-release cooling command is generated, allowing the follow-up cooling capacity value to participate in the call-up according to the subsequent period's load arrangement. Correspondingly, when both the current available cooling capacity value and the follow-up cooling capacity value are low, it indicates that the available cooling capacity provided by the current contact zone and the delayed contact zone is at a low level. Alternatively, when none of the subsequent periods' load arrangements are higher than the current power command's load arrangement, it indicates that there is no cooling demand higher than the current time in subsequent periods. In this case, a reserved cooling capacity command is generated, which prevents the current available cooling capacity value and the follow-up cooling capacity value from being prioritized for call-up, thereby maintaining the correspondence between the tiered cooling release command and the available cooling capacity table and load period table.

[0138] When generating graded cooling instructions for each battery module, the following is also included:

[0139] The spatial path and battery module location are maintained separately for each battery module. The spatial paths corresponding to the bypass area and the stagnation area are excluded from the first-release cooling command and the slow-release cooling command. It is also prohibited to write the spatial path corresponding to one battery module into the graded cooling command corresponding to another battery module. The spatial path, arrival order table, heat stagnation zone table, achievable cooling capacity table, and graded cooling command are all based on the battery module location. The spatial path from the installation position of each peripheral liquid temperature point to the battery module position has been marked in the process of formation by combining the battery module position, the internal flow guiding structure information of the box, and the peripheral heat potential table. Therefore, when generating graded cooling commands for each battery module, maintaining the correspondence between the spatial path and the battery module location can ensure that the first-release cooling command, slow-release cooling command, and retained cooling capacity command are consistent with the achievable cooling capacity source of the corresponding battery module, and avoid the mixing of spatial path sources between different battery modules.

[0140] By generating tiered cooling release commands, a direct correspondence can be established between the current power command and subsequent load arrangements in the load time period table and the current available cooling capacity value and subsequent cooling capacity value in the available cooling capacity table. This allows each battery module to correspond to the cooling capacity portion under different call sequences in the current and subsequent time periods. Based on this, the first cooling release command, the slow cooling release command, and the reserved cooling capacity command can correspond to the cooling release methods of priority call, subsequent call, and deferred call, respectively, and are consistent with the accessible area, the delayed contact area, and the battery module position. Thus, the tiered cooling release command can reflect the cooling capacity call arrangements of each battery module under different time sequences.

[0141] Example 2

[0142] Please see Figure 3 As shown, this embodiment discloses a cold storage and release control system for an immersion energy storage box battery module, including:

[0143] Data acquisition module: used to set up peripheral liquid temperature points and module surface temperature points around the immersion energy storage tank and each battery module, and to collect the temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points and the battery module load data in real time to obtain the peripheral thermal potential table.

[0144] Order statistics module: Based on the pre-acquired battery module location, pre-acquired internal flow guiding structure information of the housing, and peripheral thermal position table, the spatial path from each peripheral liquid temperature point to the battery module is marked to obtain the arrival order table.

[0145] Heat retention zoning module: used to divide each spatial path into regions based on the perimeter heat potential table and arrival order table, and obtain the heat retention zoning table;

[0146] Cooling capacity statistics module: It is used to calculate the achievable cooling capacity of each battery module based on the arrival order table, heat stagnation zone table, temperature values ​​of each module's temperature point and battery module load data, and obtain the achievable cooling capacity table.

[0147] Command generation module: used to read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, it generates graded cooling release commands for each battery module.

[0148] Each module is connected via wired or wireless means to transmit data.

[0149] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the aforementioned scope.

Claims

1. A method for controlling the cold storage and release of a battery module in an immersion energy storage box, characterized in that, include: Peripheral liquid temperature points and module surface temperature points are set up around the immersion energy storage tank and each battery module, and the temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points, and the battery module load data are collected in real time to obtain the peripheral thermal potential table. Based on the pre-acquired battery module location, the pre-acquired internal flow guiding structure information of the housing, and the peripheral thermal potential table, the spatial path from each peripheral liquid temperature point to the battery module is marked to obtain the arrival order table. Based on the perimeter heat potential table and the arrival order table, each spatial path is divided into regions to obtain a heat retention zone table; Based on the arrival order table, heat retardation zone table, temperature values ​​of each module's temperature point and battery module load data, the achievable cooling capacity of each battery module is calculated, resulting in the achievable cooling capacity table. Read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, generate graded cooling release commands for each battery module.

2. The method for controlling the cold storage and release of the battery module in the immersion energy storage box according to claim 1, characterized in that, The steps to obtain the arrival order list include: The system reads the status of the energy storage tank's circulation device, inlet position, and outlet position. Based on the battery module position, the internal flow guiding structure information of the tank, and the vertical distribution of the temperature values ​​of the peripheral liquid temperature points in the upper, middle, and lower layers of the peripheral thermal table, it marks the first arrival zone, slow arrival zone, and detour zone segment by segment along the spatial path through which the medium passes, forming an arrival sequence table.

3. The method for controlling the cold storage and release of the battery module in the immersion energy storage box according to claim 2, characterized in that, The spatial path along which the medium travels is segmented into the first-arrival zone, the slow-arrival zone, and the detour zone, including: Determine the path direction from the inlet to the outlet position based on the status of the circulation device; Based on the internal flow guidance structure information of the housing, determine the spatial path from each peripheral liquid temperature point to the battery module location. The spatial paths from the installation location corresponding to the liquid temperature point in the same circumference to the location of the same battery module are compared sequentially to obtain the sorting results; In the sorting results, the directly connected spatial paths that are ranked first are marked as the first-reaching zones, the spatial paths that require the most detours or traverses are marked as the detour zones, and the remaining spatial paths that can reach the battery module location are marked as the slow-reaching zones.

4. The method for controlling the cold storage and release of the battery module in the immersion energy storage box according to claim 1, characterized in that, The steps to obtain the heat stagnation zoning table include: Based on the peripheral thermal level table, the temperature values ​​of each peripheral liquid temperature point and each module surface temperature point are read, and the temperature difference relationship between each peripheral liquid temperature point and each module surface temperature point is formed. Based on the arrival order table, the medium regions along each spatial path are divided into accessible zones, delayed contact zones, and retention zones, forming a heat retention zoning table.

5. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 4, characterized in that, The medium region along each spatial path is divided into an accessible region, a delayed access region, and a retention region, including: Based on the arrival order table, determine the priority zone, slow-arrival zone, or detour zone corresponding to each medium area; The medium area located in the first zone and whose temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point is defined as the accessible zone. The medium region located in the slow contact zone and whose temperature value of the peripheral liquid temperature point is lower than the temperature value of the module surface temperature point is defined as the delayed contact zone. The medium area located in the bypass area is defined as the retention area; The medium area located in the first or slow arrival zone, but whose temperature value at the peripheral liquid temperature point is not lower than the temperature value at the module surface temperature point, is defined as the stagnation zone.

6. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 1, characterized in that, The steps to obtain an available cooling capacity meter include: Based on the heat retardation zoning table, extract the medium area where the temperature value of the peripheral liquid temperature point in the contactable zone is lower than the temperature value of the module surface temperature point. Based on the heat stagnation zoning table, extract the medium area where the temperature value of the peripheral liquid temperature point in the delayed contact zone is lower than the temperature value of the module surface temperature point, and exclude the stagnation zone from the statistical range of the current available cooling capacity value and the continued cooling capacity value. Based on the temperature values ​​of each module's surface temperature point at continuous sampling time for the same battery module, a trend of module surface temperature change is formed. Combined with battery module load data, the current achievable cooling capacity value and the subsequent cooling capacity value are determined and written into the achievable cooling capacity table.

7. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 6, characterized in that, Determine the current available cooling capacity and the subsequent cooling capacity separately, including: For the same battery module, count the total number of all media regions within the contactable area or delayed contact area, and count the number of media regions that satisfy the temperature difference relationship that the temperature value of the peripheral liquid temperature point is lower than the temperature value of the corresponding module surface temperature point. When all media regions meet the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as high-level; When at least one medium region satisfies the temperature difference relationship, and at least one medium region does not satisfy the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as intermediate level; When there is no medium region that satisfies the temperature difference relationship, the corresponding current achievable cooling capacity value or subsequent cooling capacity value is determined as low level; Within the same level, they are sorted from largest to smallest by the difference between the temperature value of the corresponding module's surface temperature point and the temperature value of the surrounding liquid temperature point.

8. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 6, characterized in that, The steps for generating graded cooling instructions for each battery module include: Match the current power command with the current available cooling capacity, and match the load schedule for subsequent periods with the continued cooling capacity. Based on the level and call order of the currently available cooling capacity and the subsequent cooling capacity, generate a command to release cooling first, a command to release cooling slowly, or a command to retain cooling capacity.

9. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 8, characterized in that, Generate commands to release cooling first, release cooling slowly, or retain cooling capacity, including: Convert the current power command to the current time period load value, and convert the subsequent time period load arrangement to the subsequent time period load value; When the module surface temperature changes in an upward trend, and the current available cooling capacity is high or medium, a first-release cooling command is generated. When the module surface temperature changes in a stable or cooling trend, and the load value in at least one subsequent period is higher than the load value in the current period, and the subsequent cooling capacity is high or medium, a slow-release cooling command is generated. A command to retain cooling capacity is generated when both the current available cooling capacity and the subsequent cooling capacity are at a low level, or when the load values ​​of each subsequent time period are not higher than the load value of the current time period.

10. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 8, characterized in that, When generating graded cooling instructions for each battery module, the following is also included: The spatial path and the position of each battery module are kept in correspondence. The spatial path corresponding to the bypass area and the spatial path corresponding to the stagnation area are excluded from the first cooling release command and the slow cooling release command. It is also prohibited to write the spatial path corresponding to one battery module into the graded cooling release command corresponding to another battery module.

11. The method for controlling the cold storage and release of a battery module in an immersion energy storage box according to claim 1, characterized in that, The locations of the peripheral liquid temperature points include the upper, middle, and lower layers of the immersion energy storage tank, as well as around each battery module. The locations of the module surface temperature points include the surface of each battery module.

12. A cold storage and release control system for an immersion energy storage box battery module, used to implement the cold storage and release control method for an immersion energy storage box battery module as described in any one of claims 1-11, characterized in that, include: Data acquisition module: used to set up peripheral liquid temperature points and module surface temperature points around the immersion energy storage tank and each battery module, and to collect the temperature values ​​of the peripheral liquid temperature points, the temperature values ​​of the module surface temperature points and the battery module load data in real time to obtain the peripheral thermal potential table. Order statistics module: Based on the pre-acquired battery module location, pre-acquired internal flow guiding structure information of the housing, and peripheral thermal position table, the spatial path from each peripheral liquid temperature point to the battery module is marked to obtain the arrival order table. Heat retention zoning module: used to divide each spatial path into regions based on the perimeter heat potential table and arrival order table, and obtain the heat retention zoning table; Cooling capacity statistics module: It is used to calculate the achievable cooling capacity of each battery module based on the arrival order table, heat stagnation zone table, temperature values ​​of each module's temperature point and battery module load data, and obtain the achievable cooling capacity table. Command generation module: used to read the preset current power command and subsequent time period load arrangement to obtain the load time period table; based on the load time period table and the available cooling capacity table, it generates graded cooling release commands for each battery module.

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