A thermal management device, system and method for energy storage system

Abstract

The present invention relates to the field of thermal management technology for power battery energy storage systems, and in particular to a thermal management device, system and method for an energy storage system, the thermal management device comprising a heat exchange component, which is arranged on one side of a battery pack, wherein the battery pack has a plurality of battery packs arranged in a matrix; each battery pack is provided with an air flow channel for dissipating heat from internal battery cells; a first pipeline circumferentially surrounds the outside of the battery pack, and is connected to the plurality of air flow channels in a one-to-one correspondence through a plurality of first branch pipes. The thermal management device for the energy storage system provided in the present application comprises a first pipeline and a second pipeline respectively connected to the air flow channels in the battery pack, and the heat generated inside the battery pack participates in the thermal management process, and does not completely rely on energy intervention from outside the battery energy storage system, thereby reducing energy consumption, facilitating targeted thermal management of the state of each battery pack in the battery pack, and facilitating refined and balanced heat adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of power battery energy storage systems, and in particular to a thermal management device, system and method for energy storage systems. Background Art

[0002] Battery energy storage thermal management is based on the impact of temperature on battery performance and the optimal charging and discharging temperature range of a specific battery. It controls the temperature through reasonable design to solve the problem of thermal dissipation or thermal runaway caused by the battery operating at too high or too low a temperature.

[0003] In traditional thermal management technology for battery energy storage systems, no matter what method is used to control the temperature, cool or heat the battery, the entire process relies entirely on energy intervention from outside the battery energy storage system to achieve thermal management, which will generate huge energy consumption. In addition, the existing thermal management operations are basically performed uniformly on the internal state of the battery pack, which also increases the energy consumption during cooling and heating. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a thermal management device, system and method for an energy storage system.

[0005] In a first aspect, an embodiment of the present invention provides a thermal management device for an energy storage system, the thermal management device comprising:

[0006] The heat exchange component is arranged on one side of the battery pack, and the battery pack has multiple battery groups arranged in a matrix; each battery group is provided with an air flow channel for dissipating heat from the internal battery blocks;

[0007] The first pipeline circumferentially surrounds the outer side of the battery pack and is connected to the plurality of air flow channels in a one-to-one correspondence through a plurality of first branch pipes;

[0008] A second pipeline is provided between two adjacent rows or columns of battery packs, and the second pipeline is connected to the plurality of air flow channels in a one-to-one correspondence through a plurality of second branch pipes;

[0009] An active heat exchange pipeline, whose inlet end is connected to the air outlet of the heat exchange component or the heat recovery unit, and whose outlet end is connected to the first pipeline;

[0010] The passive heat exchange pipeline has an inlet end connected to the second pipeline, and an outlet end that passes through the first pipeline and is connected to the second air outlet of the heat exchange component; the second pipeline and the first pipeline are in a cross-through structure.

[0011] In combination with the first aspect, the battery pack comprises:

[0012] The battery pack body includes a plurality of battery blocks connected in series, and heat sinks are arranged between adjacent battery blocks;

[0013] A heat exchanger, the heat exchanger circumferentially surrounding the battery pack body and having fins extending outward;

[0014] The packaging component comprises a lower shell, an upper cover shell and a connecting shell for connecting the lower shell and the upper cover shell; the lower shell, the upper cover shell, the heat exchange element and the connecting shell together form an air flow channel.

[0015] In combination with the first aspect, the connecting shell includes first to fourth air guide plates that are integrally formed and connected in sequence; the cross-sections of the first to fourth air guide plates are all C-shaped structures.

[0016] In combination with the first aspect, a first through hole and a second through hole are provided on the connecting shell, and the active heat exchange pipeline is connected to the air flow channel through the first through hole; the passive heat exchange pipeline is connected to the air flow channel through the second through hole.

[0017] In combination with the first aspect, the first through hole and the second through hole are opened on two oppositely arranged air guide plates.

[0018] In combination with the first aspect, the thermal management device further includes:

[0019] There are a plurality of first control valves, corresponding one-to-one to the plurality of first branch pipes;

[0020] The second control valve is arranged in the active heat exchange pipeline, and is used to open or close the connecting pipeline between the first pipeline and the air outlet of the heat exchange component and / or the heat recovery unit.

[0021] In combination with the first aspect, the pipeline connecting the active heat exchange pipeline and the air outlet of the heat exchange component is also connected to the exhaust pipe through the third control valve.

[0022] In a second aspect, the present application provides an energy storage system thermal management system, comprising a control unit and the above-mentioned energy storage system thermal management device.

[0023] In conjunction with the second aspect, the system further includes:

[0024] A first temperature monitoring mechanism, used to monitor the temperature of each battery pack;

[0025] A second temperature monitoring mechanism is used to monitor the ambient temperature;

[0026] The first temperature monitoring mechanism and the second temperature monitoring mechanism are respectively connected to the control unit.

[0027] In a third aspect, the present application provides a method for thermal management of an energy storage system, which is applied to a control unit in the above-mentioned thermal management system of the energy storage system; the method comprises:

[0028] Acquiring ambient temperature data and first temperature data of each battery pack;

[0029] generating a heat exchange instruction based on the ambient temperature data and all the first temperature data;

[0030] Based on a preset mapping relationship, determining a target valve corresponding to a target battery pack in a thermal instruction;

[0031] The target valve is controlled to open to conduct the target heat exchange path to adjust the temperature of the target battery pack.

[0032] In conjunction with the third aspect, the step of generating a heat exchange instruction based on the ambient temperature data and all current temperature data includes:

[0033] Based on the preset mapping relationship, obtain the working temperature safety threshold range corresponding to the ambient temperature data;

[0034] Combining the current temperature data of all battery packs, determining a first quantity of the current temperature data exceeding the operating temperature safety threshold range;

[0035] Determining whether the first quantity is greater than a first quantity threshold;

[0036] If so, generating a first heat exchange instruction based on a comparison relationship between the ambient temperature and the operating temperature safety threshold range;

[0037] According to the first heat exchange instruction, all valves are used as target valves, and the target valves are opened for a first time period;

[0038] Acquiring second temperature data of each battery pack;

[0039] Calculate the equilibrium temperature of the battery pack by combining all the second temperature data;

[0040] Determine whether the equilibrium temperature is within the operating temperature safety threshold range;

[0041] If so, generating a second heat exchange instruction based on the operating temperature safety threshold range and all second temperature data;

[0042] Based on the second heat exchange instruction, the battery pack whose second temperature data is different from the equilibrium temperature is updated as the target battery pack, the valve corresponding to the target battery pack is updated as the target valve, and the target valve is opened for a second time to conduct the target heat exchange path, so as to adjust the temperature of the target battery pack;

[0043] Among them, the second duration is shorter than the first duration.

[0044] In combination with the third aspect, after the step of determining whether the first quantity is greater than the first quantity threshold, the method further includes:

[0045] The battery pack whose current temperature data exceeds the operating temperature safety threshold range is taken as the target battery pack, and a third heat exchange instruction is generated.

[0046] Based on the third heat exchange instruction, the target valve corresponding to the target battery pack is controlled to operate for a third time period.

[0047] Among them, the third duration is greater than the second duration, and less than the first duration.

[0048] In conjunction with the third aspect, the step of determining whether the equilibrium temperature is within the operating temperature safety threshold range further includes:

[0049] If not, the second temperature data exceeding the operating temperature safety threshold range is eliminated to obtain the third temperature data;

[0050] Based on all the third temperature data, calculating the target equilibrium temperature of the battery pack and generating a fourth heat exchange instruction;

[0051] Based on the fourth heat exchange instruction, updating the battery pack with a temperature different from the target equilibrium temperature to the target battery pack, updating the valve corresponding to the target battery pack to the target valve, and opening the target valve for a fourth time to conduct the target heat exchange path, so as to adjust the temperature of the target battery pack;

[0052] Among them, the fourth duration is greater than or equal to the third duration.

[0053] In combination with the third aspect, after the step of controlling the target valve to open to conduct the target heat exchange path to adjust the temperature of the target battery pack, the method further includes:

[0054] For each battery group, a first temperature difference between the battery group and an adjacent battery group is calculated.

[0055] If the first temperature difference is greater than the temperature difference threshold, the battery group close to the target balance temperature threshold is used as the first battery group.

[0056] The target first control valve corresponding to the first battery group is controlled to be closed until the temperature adjustment of the adjacent battery group is completed.

[0057] The embodiments of the present invention bring the following beneficial effects: the thermal management device, system and method of the energy storage system provided by the present application, the thermal management device includes a heat exchange component, which is arranged on one side of the battery pack, and the battery pack has a plurality of battery groups arranged in a matrix; each battery group is provided with an air flow channel for dissipating heat of the internal battery core blocks; a first pipeline circumferentially surrounds the outside of the battery pack, and is connected to the plurality of air flow channels one-to-one through a plurality of first branches; a second pipeline is arranged between two adjacent rows or columns of battery groups, and the second pipeline is connected to the plurality of air flow channels one-to-one through a plurality of second branches; an active heat exchange pipeline, whose inlet end is connected to the air outlet of the heat exchange component or the heat recovery unit, and whose outlet end is connected to the first pipeline; a passive heat exchange pipeline, whose inlet end is connected to the second pipeline, and whose outlet end is connected to the second air outlet of the heat exchange component after passing through the first pipeline; the second pipeline and the first pipeline are in a cross-through structure.

[0058] In the thermal management device of the energy storage system provided in the present application, the first pipeline and the second pipeline are respectively connected to the air flow channel in the battery pack, and the heat generated inside the battery pack participates in the thermal management process, and does not completely rely on energy intervention outside the battery energy storage system, thereby reducing energy consumption, facilitating targeted thermal management of the status of each battery pack in the battery pack, and facilitating refined and balanced heat adjustment.

[0059] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0060] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0062] Figure 1 A schematic diagram of the structure of a thermal management device for an energy storage system provided in an embodiment of the present invention;

[0063] Figure 2 A schematic diagram of the exploded packaging structure of a battery pack in a thermal management device for an energy storage system provided in an embodiment of the present invention;

[0064] Figure 3 A schematic flow chart of a heat pipe method for an energy storage system provided by an embodiment of the present invention;

[0065] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0066] Reference numerals:

[0067] 1-heat exchange assembly, 2-first pipeline, 21-first branch pipe, 3-second pipeline, 31-second branch pipe, 4-active heat exchange pipeline, 5-passive heat exchange pipeline, 6-battery pack, 61-air flow channel, 62-battery core block, 63-heat exchange element, 64-lower shell, 65-upper cover shell, 66-connecting shell, 661-first through hole, 662-second through hole, 7-first control valve, 8-second control valve, 9-third control valve, 10-connecting pipeline;

[0068] 130 - processor, 131 - memory, 132 - bus, 133 - communication interface. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0070] In order to facilitate the understanding of this embodiment, the technical terms designed in this application are briefly introduced below.

[0071] Energy storage is the process of converting electrical energy into other forms of energy and storing it. The basic method of energy storage is to first convert electricity into other forms of energy and store it in an energy storage device, and then release it when needed. According to the characteristics of energy conversion, electrical energy can be converted into kinetic energy, potential energy, chemical energy, etc.

[0072] After introducing the technical terms involved in this application, the application scenarios and design concepts of the embodiments of this application are briefly introduced.

[0073] With the rapid development of the new energy industry, energy storage systems can be connected to the power grid to alleviate the fluctuations in the output power of new energy power generation systems and improve the stability of the power grid. Traditional thermal management technology for battery energy storage systems completely relies on energy intervention from outside the battery energy storage system to achieve thermal management, which will generate huge energy consumption. In addition, the existing technology basically performs unified thermal management operations on the internal state of the battery pack, which also increases the energy consumption during cooling and heating.

[0074] Based on this, embodiments of the present application provide a thermal management device, system and method for an energy storage system.

[0075] Example 1

[0076] The present application provides a thermal management device for an energy storage system. Figure 1 As shown, the thermal management device includes: a heat exchange component 1, a first pipeline 2, a second pipeline 3, an active heat exchange pipeline 4 and a passive heat exchange pipeline 5.

[0077] The heat exchange assembly 1 is arranged at one side of the battery pack, and the battery pack has a plurality of battery groups 6 arranged in a matrix; each battery group 6 is provided with an air flow channel 61 for dissipating heat from the internal battery blocks.

[0078] The first pipeline 2 surrounds the outside of the battery pack, and is connected to the air flow channels 61 through a plurality of first branch pipes 21 .

[0079] The second pipeline 3 is disposed between two adjacent rows or columns of battery packs 6 , and the second pipeline 3 is connected to the plurality of air flow channels 61 in a one-to-one correspondence through the plurality of second branch pipes 31 .

[0080] The inlet end of the active heat exchange pipeline 4 is connected to the air outlet of the heat exchange component 1 or the heat recovery unit (not shown in the figure), and the outlet end is communicated with the first pipeline 2.

[0081] The inlet end of the passive heat exchange pipeline 5 is connected to the second pipeline 3, and the outlet end passes through the first pipeline 2 and is connected to the second air outlet of the heat exchange component 1; the second pipeline 3 and the first pipeline 2 are in a cross-through structure.

[0082] In this embodiment, a heat exchange component 1 is arranged outside the battery pack, and the heat exchange component 1 is connected to the gas path of each battery pack through the first pipeline 2 and the active heat exchange pipeline 4 to actively transport gas into the battery pack for active temperature adjustment, and is connected to the gas path of the heat exchange component 1 through the second pipeline 3 and the passive heat exchange pipeline 5 to discharge the heat generated during the operation of the battery pack to the heat exchange component. In this way, the heat generated inside the battery pack participates in the heat management process, and does not completely rely on the energy intervention outside the battery energy storage system, thereby reducing energy consumption, facilitating targeted thermal management of the state of each battery pack in the battery pack, and facilitating refined and balanced heat adjustment.

[0083] In combination with the first aspect, the battery pack 6 includes: a battery pack body, a heat exchange component 63, and a packaging assembly.

[0084] Combination Figure 2 As shown, the battery pack body includes a plurality of battery core blocks 62 connected in series, and heat sinks (not shown in the figure) are arranged between adjacent battery core blocks 62 .

[0085] The heat exchange member 63 circumferentially surrounds the battery pack body and has fins extending outward.

[0086] The packaging assembly includes a lower shell 64 , an upper cover shell 65 and a connecting shell 66 for connecting the lower shell 64 and the upper cover shell 65 ; the lower shell 64 , the upper cover shell 65 , the heat exchange element 63 and the connecting shell 66 together form an air flow channel 61 .

[0087] It can be understood that a battery pack body is arranged on the lower shell 64, and a connecting shell 66 is sleeved on the outside of the battery pack body. There is a gap between the outer wall of the battery pack body and the inner wall of the connecting shell 66. An upper cover shell 65 is connected at the top for packaging. The space enclosed by the upper cover shell 65, the lower shell 64 and the outer wall of the battery pack body is the airflow channel, that is, the space enclosed by the above-mentioned gap and the upper cover shell 65 is the airflow channel.

[0088] When the battery pack is running, the electric core blocks 62 in the battery pack 6 will generate heat, which is transferred to the air flow channel through the heat exchanger 63. Similarly, the gas in the air flow channel also transfers heat with the battery pack, that is, each electric core block 62 can exchange heat with the gas in the air flow channel. In this way, the temperature of each electric core block 62 in the battery pack 6 can be adjusted by passing airflows of different temperatures into the air flow channel.

[0089] In combination with the first aspect, the connecting shell 66 includes first to fourth air guide plates that are integrally formed and sequentially connected; the cross-sections of the first to fourth air guide plates are all C-shaped structures.

[0090] In this embodiment, the cross-sections of the first to fourth air guide plates are all C-shaped structures, forming an inward-curling structure, thereby preventing the airflow from escaping outwards during the flow of the air.

[0091] In combination with the first aspect, a first through hole 661 and a second through hole 662 are provided on the connecting shell 66 , and the active heat exchange pipeline 4 is connected to the air flow channel through the first through hole 661 ; the passive heat exchange pipeline 5 is connected to the air flow channel through the second through hole 662 .

[0092] In combination with the first aspect, the first through hole 661 and the second through hole 662 are provided on two oppositely disposed air guide plates.

[0093] The connection shell 66 is provided with a first through hole 661 and a second through hole 662 , so as to be connected to an external pipeline through the first through hole 661 and the second through hole 662 , thereby performing heat exchange inside and outside the battery pack.

[0094] In combination with the first aspect, the device further includes: a first control valve 7 and a second control valve 8 .

[0095] There are multiple first control valves 7 corresponding to the multiple first branch pipes 21 one by one.

[0096] It can be understood that the plurality of first control valves 7 correspond to the plurality of first branch pipes 21 one by one, so that by opening the first control valve 7 to conduct the corresponding first branch pipe 21, the pipeline connection between the first pipeline 2, the first branch pipe 21, and the cell block 62 connected to the first branch pipe 21 is conducted, so that the corresponding gas for temperature regulation is introduced into the cell block 62. Similarly, by closing the first control valve 7 to block the corresponding first branch pipe 21, the pipeline connection between the first pipeline 2, the first branch pipe 21, and the cell block 62 connected to the first branch pipe 21 is blocked, so that the corresponding gas for temperature regulation is stopped from being introduced into the cell block 62.

[0097] The second control valve 8 is disposed in the active heat exchange pipeline 4 and is used to open or close the connecting pipeline 10 between the first pipeline 2 and the air outlet of the heat exchange component 1 and / or the heat recovery unit.

[0098] Similarly, the second control valve 8 is opened to open the pipeline connection between the heat exchange component 1 and the first pipeline 2, or to open the connecting pipeline 10 between the heat recovery unit and the heat exchange component 1.

[0099] When the second control valve 8 is closed, the above-mentioned pipeline connection is blocked to stop the gas for heat exchange from being transported to the first pipeline 2 .

[0100] The heat recovery unit is arranged on one side of the heat exchange component 1 and is used to absorb the heat generated when the heat exchange component 1 is working, so as to realize heat recovery and reuse.

[0101] In combination with the first aspect, the pipeline connecting the active heat exchange pipeline 4 and the air outlet of the heat exchange component 1 is also connected to an exhaust pipe through the third control valve 9.

[0102] In this way, the third control valve 9 is opened to discharge the surplus heat along the exhaust pipe.

[0103] In a second aspect, the present application provides an energy storage system thermal management system, comprising a control unit and the above-mentioned energy storage system thermal management device.

[0104] The control unit is connected to a plurality of first control valves 7, second control valves 8, third control valves 9 and heat exchange components 1 in the thermal management device of the energy storage system. In this embodiment, each control valve is connected to the control unit, and the control unit adjusts the operating state of each control valve to open or block the corresponding pipeline, thereby performing heat exchange with the electric heating group.

[0105] In combination with the second aspect, the system further includes: a first temperature monitoring mechanism and a second temperature monitoring mechanism.

[0106] The first temperature monitoring mechanism is used to monitor the temperature of each battery pack 6 .

[0107] The second temperature monitoring mechanism is used to monitor the ambient temperature.

[0108] The first temperature monitoring mechanism and the second temperature monitoring mechanism are respectively connected to the control unit.

[0109] It can be understood that by detecting the temperature of each battery pack 6 and the environment, the temperature distribution in the entire energy storage system can be understood, and temperature adjustment can be performed based on the temperature distribution to balance the temperature everywhere, thereby improving the overall operating stability of the energy storage system and avoiding thermal dissipation or thermal runaway problems caused by abnormal operating temperature.

[0110] In a third aspect, the present application provides a method for thermal management of an energy storage system, which is applied to a control unit in the above-mentioned thermal management system of the energy storage system. Figure 3 As shown, the method includes:

[0111] S110, acquiring ambient temperature data and first temperature data of each battery pack.

[0112] S120: Generate a heat exchange instruction based on the ambient temperature data and all the first temperature data.

[0113] S130, determining a target valve corresponding to the target battery pack in the thermal instruction based on a preset mapping relationship.

[0114] S140, controlling the target valve to open to conduct the target heat exchange path to adjust the temperature of the target battery pack.

[0115] In the present application, the ambient temperature and the temperature of each battery pack 6 in the energy storage system are detected, and a heat exchange instruction is generated based on the detected temperature data. The heat exchange instruction carries the target pipeline to be heat exchanged (i.e., the target heat exchange path) and the corresponding target valve. In this way, the target valve is opened to allow hot air or cold air to be introduced into the target heat exchange path to adjust the temperature of the target battery pack, thereby adjusting the operating temperature of each target battery pack to avoid thermal escape and thermal runaway caused by abnormal operating temperature.

[0116] Among them, the heat exchange instruction includes: heating instruction and cooling instruction. For different battery packs 6, the corresponding heat exchange instructions may also be different. When receiving the heating instruction, the corresponding target valves are the first control valve 7 and the second control valve 8. When the heat source for executing the heating instruction is the heat dissipated by the heat exchange component 1, the corresponding target valve also includes the third control valve 9. It can be understood that before actual application, the i-th battery pack 6 is numbered and the connection relationship between the corresponding first branch pipe 21 and the first control valve 7 is constructed, such as: 6 i -twenty one i -7 i . In actual application, when the fifth battery pack 6 needs to be heated, the heat exchange instruction carries the following information: 65-215-75. In addition, the heating element for this heating uses the heat dissipated by the heat exchange component 1 when it is working, so the heat exchange instruction also carries the following information: 8, 9. That is, when the temperature of the battery pack 6 is adjusted, the heat exchange instruction is specifically: 65-215-75, 8, 9. That is, open 9 to connect the heat recovery unit, open 8 to conduct the connection between the heat recovery unit, the heat exchange component 1 and the active heat exchange pipeline 4, and open 75 to conduct the active heat exchange pipeline 4 and the pipeline connection of the fifth battery pack 6 (numbered 65), that is, the pipeline numbered 215. In this way, heat is passed from the heat exchange component 1, the heat recovery unit along the active heat exchange pipeline 4, 215 to the battery pack 6 numbered 65. In this way, the heat generated by the battery energy storage system can be recycled and utilized, thereby reducing energy consumption, facilitating targeted thermal management of the state of each battery group 6 in the battery pack, and facilitating refined and balanced heat adjustment.

[0117] Similarly, when a cooling instruction is received, heat is extracted along the second branch pipe 31 , the second pipeline 3 , and the passive heat exchange pipeline 5 to the heat exchange component 1 to reduce the temperature of the battery pack 6 .

[0118] In conjunction with the third aspect, step S120 includes:

[0119] S121, based on a preset mapping relationship, obtaining a working temperature safety threshold range corresponding to the ambient temperature data.

[0120] S122, combining the first temperature data of all battery packs, determining a first quantity of current temperature data exceeding a safe operating temperature threshold range.

[0121] S123, determining whether the first quantity is greater than a first quantity threshold.

[0122] If so, execute steps S124-S128.

[0123] S124: Generate a first heat exchange instruction based on a comparison relationship between the ambient temperature and the operating temperature safety threshold range.

[0124] S125, according to the first heat exchange instruction, all valves are used as target valves, and the target valves are opened for a first time period.

[0125] S126, obtaining second temperature data of each battery pack.

[0126] S127, calculating the equilibrium temperature of the battery pack by combining all the second temperature data.

[0127] S128, determining whether the equilibrium temperature is within a safe operating temperature threshold range.

[0128] If so, execute step S129.

[0129] S129, based on the second heat exchange instruction, update the battery pack whose second temperature data is different from the equilibrium temperature to the target battery pack, update the valve corresponding to the target battery pack to the target valve, and open the target valve for a second time to conduct the target heat exchange path to adjust the temperature of the target battery pack.

[0130] Among them, the second duration is shorter than the first duration.

[0131] In this embodiment, the operating temperature safety threshold corresponding to the current ambient temperature data is determined according to a preset mapping relationship, and then the current temperature data of the battery pack 6 is compared with the operating temperature safety threshold to determine whether each battery pack 6 is at a safe temperature. If there are a large number of battery packs 6 at abnormal operating temperatures, all the battery packs 6 are first subjected to uniform heat exchange, and then the equilibrium temperature of the battery pack is calculated based on the second temperature data of all the battery packs 6. When the equilibrium temperature is within the operating temperature safety threshold range, it indicates that the calculated equilibrium temperature is correct and meets the expected working requirements. At this time, the target battery pack to be adjusted and the corresponding target valve can be determined based on the equilibrium temperature and all the second temperature data, so that temperature adjustment can be performed to adjust the temperature of each target battery pack.

[0132] In combination with the third aspect, after step S123, the method further includes:

[0133] If not, execute step S1231.

[0134] S1231, taking the battery pack whose current temperature data exceeds the operating temperature safety threshold range as the target battery pack, and generating a third heat exchange instruction.

[0135] S1232: Based on the third heat exchange instruction, control the target valve corresponding to the target battery pack to operate for a third time period.

[0136] Among them, the third duration is greater than the second duration, and less than the first duration.

[0137] It is understandable that when the number of battery packs 6 exceeding the operating temperature safety threshold range is small, unified temperature adjustment is no longer required, and temperature adjustment is only required for the target battery packs with abnormal operating temperature. The specific adjustment method is to open the corresponding valves and connect the corresponding pipelines for heat exchange.

[0138] In combination with the third aspect, after step S128, the method further includes:

[0139] If not, execute step S1281.

[0140] S1281, eliminate the second temperature data that exceeds the operating temperature safety threshold range to obtain the third temperature data.

[0141] S1282: Based on all the third temperature data, calculate the target equilibrium temperature of the battery pack and generate a fourth heat exchange instruction.

[0142] S1283, based on the fourth heat exchange instruction, updating the battery pack with a temperature different from the target equilibrium temperature to the target battery pack, updating the valve corresponding to the target battery pack to the target valve, and opening the target valve for a fourth time to conduct the target heat exchange path, so as to adjust the temperature of the target battery pack;

[0143] Among them, the fourth duration is greater than or equal to the third duration.

[0144] In this embodiment, if the initially calculated equilibrium temperature does not meet the working safety temperature, it means that the temperature of most battery packs 6 is too high or too low, so it is necessary to redetermine the equilibrium temperature before further temperature adjustment, which can improve the effectiveness and accuracy of temperature adjustment.

[0145] In combination with the third aspect, after step S140, the method further includes:

[0146] S150 , for each battery pack, calculating a first temperature difference between the battery pack and an adjacent battery pack.

[0147] S160: If the first temperature difference is greater than the temperature difference threshold, the battery group close to the target balance temperature threshold is used as the first battery group.

[0148] S170, controlling the target first control valve corresponding to the first battery group to close until the temperature adjustment of the adjacent battery group is completed.

[0149] It can be understood that after temperature adjustment, the first temperature difference between each battery group 6 and other battery groups 6 is calculated, so that the temperature difference between each battery group 6 can be understood. If the temperature difference is too large, the first branch pipe 21 corresponding to the battery group 6 that does not need to be adjusted can be closed to increase the regulating gas introduced into the battery group 6 to be adjusted, so as to speed up the temperature adjustment speed.

[0150] In a fourth aspect, an embodiment of the present application provides an electronic device, Figure 4 As shown, the electronic device includes a memory 131 and a processor 130. The memory 131 is used to store computer programs, and the processor 130 runs the computer programs to enable the electronic device to perform the above method.

[0151] Furthermore, combined with Figure 4 The electronic device shown further includes a bus 132 and a communication interface 133 , and the processor 130 , the communication interface 133 and the memory 131 are connected via the bus 132 .

[0152] The memory 131 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 133 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 132 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0153] The processor 130 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 130. The above processor 130 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 131, and the processor 130 reads the information in the memory 131 and completes the steps of the method of the above embodiment in combination with its hardware.

[0154] In a fifth aspect, an embodiment of the present application provides a readable storage medium, in which computer program instructions are stored. When the computer program instructions are read and executed by a processor, the above method is executed.

[0155] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0156] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0157] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0158] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0159] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A thermal management device for an energy storage system, characterized in that: The thermal management device comprises: A heat exchange assembly is provided on one side of a battery pack, wherein the battery pack has a plurality of battery packs arranged in a matrix; each of the battery packs is provided with an air flow channel for dissipating heat from the internal battery blocks; A first pipeline circumferentially surrounds the outer side of the battery pack and is connected to the plurality of air flow channels in a one-to-one correspondence through a plurality of first branch pipes; A second pipeline is provided between two adjacent rows or columns of the battery packs, and the second pipeline is connected to the plurality of air flow channels in a one-to-one correspondence through a plurality of second branch pipes; An active heat exchange pipeline, whose inlet end is connected to the air outlet of the heat exchange component or the heat recovery unit, and whose outlet end is connected to the first pipeline; A passive heat exchange pipeline, the inlet end of which is connected to the second pipeline, and the outlet end of which passes through the first pipeline and is connected to the second air outlet of the heat exchange component; the second pipeline and the first pipeline are in a cross-through structure; There are a plurality of first control valves, corresponding one-to-one to the plurality of the first branch pipes; A second control valve, provided in the active heat exchange pipeline, for opening or closing the connecting pipeline between the first pipeline and the air outlet of the heat exchange component and / or the heat recovery unit; Wherein, the battery pack comprises: The battery pack body comprises a plurality of the battery core blocks connected in series, and heat sinks are arranged between adjacent battery core blocks; A heat exchange member circumferentially surrounding the battery pack body; the heat exchange member has fins extending outward; The packaging assembly comprises a lower shell, an upper cover shell and a connecting shell for connecting the lower shell and the upper cover shell; the lower shell, the upper cover shell, the heat exchange element and the connecting shell together form the airflow channel.

2. The thermal management device according to claim 1, characterized in that: The connecting shell includes first to fourth air guide plates which are integrally formed and connected in sequence; the cross sections of the first to fourth air guide plates are all C-shaped structures.

3. The thermal management device according to claim 1, characterized in that: The connecting shell is provided with a first through hole and a second through hole. The active heat exchange pipeline is communicated with the air flow channel through the first through hole; the passive heat exchange pipeline is communicated with the air flow channel through the second through hole.

4. The thermal management device according to claim 3, characterized in that: The first through hole and the second through hole are formed on two oppositely disposed air guide plates.

5. The thermal management device according to claim 3, characterized in that: The pipeline connecting the active heat exchange pipeline and the air outlet of the heat exchange component is also connected to an exhaust pipe through a third control valve.

6. A thermal management system for an energy storage system, characterized in that: The invention comprises a control unit and a thermal management device of an energy storage system as claimed in any one of claims 1 to 5.

7. The system according to claim 6, characterized in that The system further comprises: A first temperature monitoring mechanism, used to monitor the temperature of each battery pack; A second temperature monitoring mechanism is used to monitor the ambient temperature; The first temperature monitoring mechanism and the second temperature monitoring mechanism are connected to the control unit respectively.

8. A thermal management method for an energy storage system, characterized in that: A control unit used in a thermal management system of an energy storage system according to any one of claims 6 to 7; the method comprising: Acquiring ambient temperature data and first temperature data of each battery pack; generating a heat exchange instruction based on the ambient temperature data and all the first temperature data; Determining a target valve corresponding to a target battery pack in the thermal instruction based on a preset mapping relationship; The target valve is controlled to open to conduct the target heat exchange path, so as to adjust the temperature of the target battery pack.

9. The method according to claim 8, characterized in that The step of generating a heat exchange instruction based on the ambient temperature data and all the first temperature data comprises: Based on a preset mapping relationship, obtaining a safe threshold range of the operating temperature corresponding to the ambient temperature data; Combining the current temperature data of all battery packs, determining a first quantity of the current temperature data exceeding the operating temperature safety threshold range; Determining whether the first quantity is greater than a first quantity threshold; If so, generating a first heat exchange instruction based on a comparison relationship between the ambient temperature and the operating temperature safety threshold range; According to the first heat exchange instruction, all valves are used as target valves, and the target valves are opened for a first time period; Acquiring second temperature data of each battery pack; Calculating the equilibrium temperature of the battery pack by combining all the second temperature data; Determining whether the equilibrium temperature is within the operating temperature safety threshold range; If so, generating a second heat exchange instruction based on the operating temperature safety threshold range and all of the second temperature data; Based on the second heat exchange instruction, the battery pack whose second temperature data is different from the equilibrium temperature is updated as a target battery pack, and the valve corresponding to the target battery pack is updated as a target valve, and the target valve is opened for a second time to conduct the target heat exchange path, so as to adjust the temperature of the target battery pack; The second duration is shorter than the first duration.

10. The method according to claim 9, characterized in that After the step of determining whether the first quantity is greater than a first quantity threshold, the method further includes: Taking the battery pack whose current temperature data exceeds the operating temperature safety threshold range as the target battery pack, and generating a third heat exchange instruction; Based on the third heat exchange instruction, controlling the target valve corresponding to the target battery group to operate for a third time period; The third duration is greater than the second duration and less than the first duration.

11. The method according to claim 10, characterized in that The step of judging whether the equilibrium temperature is within the operating temperature safety threshold range further includes: If not, the second temperature data exceeding the operating temperature safety threshold range is eliminated to obtain the third temperature data; Based on all the third temperature data, calculating the target equilibrium temperature of the battery pack and generating a fourth heat exchange instruction; Based on the fourth heat exchange instruction, the battery pack having a temperature different from the target equilibrium temperature is updated as a target battery pack, a valve corresponding to the target battery pack is updated as a target valve, and the target valve is opened for a fourth time period to conduct a target heat exchange path, so as to adjust the temperature of the target battery pack; The fourth duration is greater than or equal to the third duration.

12. The method according to claim 8, characterized in that After the step of controlling the target valve to open to conduct the target heat exchange path to adjust the temperature of the target battery pack, the method further includes: For each of the battery groups, calculating a first temperature difference between the battery group and an adjacent battery group; If the first temperature difference is greater than the temperature difference threshold, the battery group close to the target balance temperature threshold is used as the first battery group; The target first control valve corresponding to the first battery group is controlled to be closed until the temperature adjustment of the adjacent battery group is completed.

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