Energy storage battery module and cooling method thereof, energy storage system and readable storage medium

Abstract

The invention relates to an energy storage battery module and a cooling method thereof, an energy storage system and a readable storage medium. The energy storage battery module comprises a plurality of first liquid cooling plates and a plurality of battery cell units, the first liquid cooling plates and the battery cell units are alternately arranged in the first direction and are arranged in a contact mode, a plurality of first flow channels are formed in the first liquid cooling plates, and the first flow channels extend in the second direction and are arranged at intervals in the third direction; in the multiple first liquid cooling plates, the first flow channels which are arranged in the same position in the third direction are sequentially communicated, and cooling liquid flows from the first flow channel of the first liquid cooling plate close to the liquid inlet pipeline to the first flow channel of the first liquid cooling plate far away from the liquid inlet pipeline; and each first flow channel of the first liquid cooling plate close to the liquid inlet pipeline is connected with the liquid inlet pipeline. The temperature difference value of the battery cell units in the third direction is reduced, the cooling effect of the cooling liquid is improved, and the service life of the energy storage battery module is prolonged.

Description

Technical Field

[0001] The present application relates to the field of solar energy technology, and in particular to an energy storage battery module and a cooling method thereof, an energy storage system and a readable storage medium. Background Art

[0002] The energy storage battery module is composed of multiple battery cells. The battery cells will generate heat during operation, which affects the service life of the energy storage battery module. Usually, a cooling plate is set at the bottom of the energy storage battery module to reduce the temperature of the battery cells. As the single cell capacity of the battery cells in the energy storage battery module increases, the temperature difference of the battery cells in the height direction becomes more and more obvious, affecting the service life of the energy storage battery module. Summary of the invention

[0003] Based on this, it is necessary to provide an energy storage battery module and its cooling method, energy storage system and readable storage medium that can ensure the temperature uniformity of the battery cell temperature in order to address the above technical problems.

[0004] In a first aspect, an energy storage battery module is provided, comprising: a plurality of battery cell units and a plurality of first liquid cooling plates; the plurality of first liquid cooling plates and the plurality of battery cell units are alternately arranged along a first direction and are arranged in contact with each other, a plurality of first flow channels are opened in the first liquid cooling plate, the first flow channels extend along a second direction, and are arranged at intervals along a third direction, and the first direction, the second direction and the third direction intersect each other; among the plurality of first liquid cooling plates, the first flow channels arranged at the same position in the third direction are connected in sequence, and the coolant flows from the first flow channel of the first liquid cooling plate close to the liquid inlet pipeline to the first flow channel of the first liquid cooling plate away from the liquid inlet pipeline; each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is respectively connected to the liquid inlet pipeline.

[0005] In one embodiment, the energy storage battery module further includes:

[0006] A temperature detection module, used to detect the cell temperature of the top surface of the cell unit in the third direction and generate a temperature signal;

[0007] A control module is connected to the temperature detection module and is used to control the cooling parameters of the coolant in each of the first flow channels of the first liquid cooling plate near the liquid inlet pipeline from the liquid inlet pipeline according to the temperature signal, so as to adjust the temperature of the battery cell unit.

[0008] In one embodiment, the cooling parameter includes a flow parameter of the coolant, and the energy storage battery module further includes:

[0009] A plurality of regulating valves, the plurality of regulating valves and the plurality of first flow channels of the first liquid cooling plate near the liquid inlet pipeline are respectively arranged correspondingly; the plurality of regulating valves are connected to the control module; and are used to adjust the cooling parameters of the coolant entering the corresponding first flow channels to adjust the temperature of the battery cell unit;

[0010] The control module is used to control the opening degree of each regulating valve according to the temperature signal to adjust the flow parameter of the coolant entering each first flow channel.

[0011] In one embodiment, along the third direction, the plurality of first flow channels are divided into a first portion close to the top surface of the battery cell unit, a second portion away from the top surface of the battery cell unit, and a third portion located between the first portion and the second portion, the first portion and the second portion are respectively disconnected from the liquid inlet pipeline, and the third portion is connected to the liquid inlet pipeline;

[0012] Wherein, the control module is used to control the first part to be connected to the liquid inlet pipeline when the temperature signal is greater than a preset temperature signal.

[0013] In one of the embodiments, the temperature detection module is further used to detect the battery cell temperature at multiple locations on the top surface of the battery cell unit and generate multiple temperature signals;

[0014] The control module is also used to generate a temperature difference signal based on multiple temperature signals. When each of the temperature signals is less than or equal to the preset temperature signal and the temperature difference signal is greater than the preset temperature difference signal, the control module controls the third part to be connected to the liquid inlet pipeline and adjusts the cooling parameters of the coolant in the first flow channel entering the third part.

[0015] In one embodiment, a plurality of the first liquid cooling plates share the liquid inlet pipeline; and the flow directions of the coolant in the plurality of first flow channels of the same first liquid cooling plate are the same.

[0016] In one of the embodiments, at least two of the first liquid cooling plates have a height in the third direction greater than a height of the battery cell unit in the third direction.

[0017] In one embodiment, in the first direction, the first liquid cooling plate having a height greater than that of the battery cell unit is located at two ends of the energy storage battery module. In one embodiment, the energy storage battery module further includes:

[0018] A second liquid cooling plate, in the second direction, the second liquid cooling plates are respectively located at opposite ends of the battery cell unit, and a plurality of second flow channels are opened in the second liquid cooling plate; the ends of the plurality of second flow channels extending along the first direction and arranged at intervals along the third direction are respectively connected to the plurality of first flow channels of two adjacent first liquid cooling plates, so that the coolant flows between different first liquid cooling plates.

[0019] In one embodiment, the first flow channel penetrates the first liquid cooling plate in the second direction, and a plurality of communication holes are formed on a side of the second liquid cooling plate facing the battery cell unit, and the plurality of communication holes are respectively connected to ends of the plurality of second flow channels;

[0020] The opposite ends of the first liquid cooling plate are respectively abutted against one side of the second liquid cooling plate where the connecting hole is opened, and the first flow channels of the first liquid cooling plate are respectively connected to a row of connecting holes arranged at intervals along the third direction, so that the first flow channels are connected to the second flow channels.

[0021] In one of the embodiments, a plurality of liquid inlet holes penetrating the second liquid cooling plate along the second direction are provided at a position of the second liquid cooling plate near the liquid inlet pipeline, the liquid inlet holes are arranged at intervals along the third direction, and the plurality of liquid inlet holes are respectively connected to a plurality of first flow channels in the first liquid cooling plate near the liquid inlet pipeline.

[0022] In one embodiment, the energy storage battery module further includes:

[0023] A plurality of liquid inlet branches, one end of each of the plurality of liquid inlet branches is connected to the plurality of liquid inlet holes respectively, and the other end of each of the plurality of liquid inlet branches is communicated with the liquid inlet pipeline, so that the first flow channel is connected to the liquid inlet pipeline.

[0024] In one of the embodiments, a plurality of liquid outlet holes penetrating the second liquid cooling plate along the second direction are formed at a position of the second liquid cooling plate away from the liquid inlet pipeline, the liquid outlet holes are arranged at intervals along the third direction, and the plurality of liquid outlet holes are respectively connected to a plurality of first flow channels in the first liquid cooling plate away from the liquid inlet pipeline.

[0025] In one of the embodiments, the battery cell unit includes a plurality of battery cells arranged at intervals along the second direction, and opposite surfaces of each of the battery cells in the first direction are respectively in contact with adjacent first liquid cooling plates.

[0026] In a second aspect, an energy storage system is provided, comprising: a plurality of energy storage battery modules as described in any one of the above items.

[0027] In one embodiment, there are multiple energy storage battery modules, and in the third direction, multiple energy storage battery modules are stacked, and the top surface of the battery cell unit in the energy storage battery module is spaced from the bottom surface of the adjacent energy storage battery module.

[0028] In one of the embodiments, in the third direction, the top surface of the first liquid cooling plate in the energy storage battery module, which is taller than the battery cell unit, contacts the bottom surface of the adjacent energy storage battery module.

[0029] In one of the embodiments, a plurality of the stacked energy storage battery modules share a common liquid inlet pipeline and / or a common liquid outlet pipeline.

[0030] In one of the embodiments, two adjacent energy storage battery modules are arranged at intervals along a first direction to form an energy storage battery unit; the liquid outlet of the energy storage battery module close to the liquid inlet pipeline in the energy storage battery unit is connected to multiple first flow channels of the first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline.

[0031] In one of the embodiments, the multiple first flow channels of the last first liquid cooling plate of the energy storage battery module close to the liquid inlet pipeline in the energy storage battery unit are respectively connected with the multiple first flow channels of the first first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline, so that the liquid outlet of the energy storage battery module close to the liquid inlet pipeline is connected with the multiple first flow channels of the first first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline.

[0032] In one of the embodiments, in the third direction, a plurality of the energy storage battery cells are stacked, and a top surface of a cell unit of an energy storage battery module in the energy storage battery cell is spaced apart from a bottom surface of the energy storage battery module in an adjacent energy storage battery cell.

[0033] In one embodiment, the energy storage battery modules of the plurality of energy storage battery units close to the liquid inlet pipeline share the liquid inlet pipeline;

[0034] And / or the energy storage battery modules of the multiple energy storage battery units close to the liquid outlet pipeline share the liquid outlet pipeline.

[0035] In one embodiment, the energy storage system further comprises:

[0036] An energy storage battery rack, comprising columns spaced apart along a first direction;

[0037] Wherein, in the first direction, the energy storage battery unit is arranged between adjacent columns and is detachably connected to the columns.

[0038] In a third aspect, a cooling method for an energy storage battery module is provided, wherein the energy storage battery module comprises: a plurality of battery cells and a plurality of first liquid cooling plates, wherein the plurality of first liquid cooling plates and the plurality of battery cells are alternately arranged along a first direction and are arranged in contact with each other, wherein a plurality of first flow channels are provided in the first liquid cooling plate, wherein the first flow channels extend along a second direction and are arranged at intervals along a third direction, wherein the first direction, the second direction and the third direction intersect each other; wherein the first flow channels arranged at the same position in the plurality of first liquid cooling plates in the third direction are connected in sequence, wherein the cooling liquid flows from the first flow channel of the first liquid cooling plate close to the liquid inlet pipeline to the first flow channel of the first liquid cooling plate away from the liquid inlet pipeline; wherein each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is respectively connected to the liquid inlet pipeline; wherein the cooling method comprises:

[0039] detecting a cell temperature of a top surface of the cell unit in the third direction and generating a temperature signal;

[0040] According to the temperature signal, the cooling parameter of the coolant entering from the liquid inlet pipeline into each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is controlled to adjust the temperature of the battery cell unit.

[0041] In one embodiment, along the third direction, the plurality of first flow channels are divided into a first portion close to the top surface of the battery cell unit, a second portion away from the top surface of the battery cell unit, and a third portion located between the first portion and the second portion, the first portion and the second portion are respectively disconnected from the liquid inlet pipeline, and the third portion is connected to the liquid inlet pipeline; the cooling method comprises:

[0042] When the temperature signal is greater than a preset temperature signal, the first part is controlled to be connected to the liquid inlet pipeline.

[0043] In one embodiment, the cooling method of the energy storage battery module further includes:

[0044] Detecting the battery cell temperature at multiple locations on the top surface of the battery cell unit and generating multiple temperature signals;

[0045] generating a temperature difference signal according to the multiple temperature signals;

[0046] When each of the temperature signals is less than or equal to the preset temperature signal and the temperature difference signal is greater than the preset temperature difference signal, the third part is controlled to be connected to the liquid inlet pipeline, and the cooling parameters of the coolant entering the first flow channel of the third part are adjusted.

[0047] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the cooling method of the energy storage battery module described in any one of the above are implemented.

[0048] In the above-mentioned energy storage battery module, the side surface of the battery cell unit in the first direction is in contact with the first liquid cooling plate. The cooling liquid in the first flow channel arranged at intervals along the third direction opened in the first liquid cooling plate can cool the battery cell unit in the third direction, thereby reducing the temperature difference of the battery cell unit in the third direction, improving the cooling effect of the cooling liquid, and increasing the service life of the energy storage battery module.

[0049] In the cooling method of the energy storage battery module, the cooling parameters of the coolant entering each first flow channel of the first liquid cooling plate are controlled by a temperature signal generated according to the cell temperature of the top surface of the cell unit, the cooling of the cell unit by the coolant in the third direction is adjusted, the temperature difference of the cell unit in the third direction is reduced, the cooling effect of the coolant is improved, and the service life of the energy storage battery module is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0051] FIG1 is a schematic top view of an energy storage battery module in some embodiments;

[0052] Figure 2 is a cross-sectional schematic diagram of a first liquid cooling plate in some embodiments;

[0053] Figure 3 is a schematic cross-sectional view of a first liquid cooling plate near a liquid inlet pipeline in some embodiments;

[0054] Figure 4 Schematic top view of energy storage battery modules in other embodiments;

[0055] Figure 5 Schematic top view of energy storage battery modules in some other embodiments;

[0056] Figure 6 is a cross-sectional schematic diagram of a second liquid cooling plate in some embodiments;

[0057] Figure 7 is a cross-sectional schematic diagram of a second liquid cooling plate in some other embodiments;

[0058] Figure 8A schematic side view of an energy storage battery module in some embodiments;

[0059] Fig. 9 is a side view schematic diagram of an energy storage battery module without a second liquid cooling plate;

[0060] Fig.10 is a schematic side view of a first liquid cooling plate in some embodiments;

[0061] Fig.11 for Fig.10 A partial enlarged schematic diagram of

[0062] Fig.12 for Fig.10 the corresponding side view schematic diagram;

[0063] Fig.13 is a schematic side view of a first liquid cooling plate in another embodiment;

[0064] Fig.14 for Fig.13 A partial enlarged schematic diagram of

[0065] Fig.15 is a side view schematic diagram of an energy storage system in some embodiments;

[0066] Fig.16 is a schematic side view of a second liquid cooling plate in some embodiments;

[0067] Fig.17 for Fig.16 A partial enlarged schematic diagram of

[0068] Fig.18 is a side view schematic diagram of an energy storage system in some embodiments;

[0069] Fig.19 for Fig.18 A partial enlarged schematic diagram of the corresponding energy storage system;

[0070] Fig. 20 is a schematic side view of a first connecting member in some embodiments;

[0071] Fig.21 is a schematic side view of a second connecting member in some embodiments;

[0072] Fig. 22 Schematic diagram of the process of cooling the energy storage battery module in some embodiments.

[0073] Description of reference numerals:

[0074] Part 1; Part 2; Part 3; Energy storage battery module 10; Cell unit 102; First liquid cooling plate 104; First liquid cooling plate 1 1041; First liquid cooling plate 2 1042; Liquid inlet pipeline 106; Temperature detection module 108; Control module 110; Regulating valve 112; Second liquid cooling plate 114; Second liquid cooling plate 1 1141; Second liquid cooling plate 2 1142; Energy storage battery rack 116; First flow channel 202; Second flow channel 204; Cell 206; Bottom plate 208; Liquid inlet hole 210; Liquid outlet hole 212; Liquid outlet pipeline 214; Liquid inlet branch 216; Connecting hole 218; Column 220; First connecting piece 222; Second connecting piece Part 224; side panel edge beam 302; side panel bottom mounting hole 304; side panel top mounting hole 306; side panel locating pin 308; side panel flow channel side 312; side panel cavity 314; side panel edge beam locating hole 316; module connecting pipeline 402; liquid outlet branch 404; first connecting part fitting column edge 502; first connecting part column mounting hole 504; first connecting part module mounting hole 506; first connecting part fitting module edge 508; first connecting part rib 510; second connecting part module mounting hole 512; second connecting part fitting module edge 514; second connecting part rib 516; second connecting part column mounting hole 518; second connecting part fitting column edge 520. DETAILED DESCRIPTION

[0075] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0077] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first liquid cooling plate may be referred to as a second liquid cooling plate, and similarly, a second liquid cooling plate may be referred to as a first liquid cooling plate. Both the first liquid cooling plate and the second liquid cooling plate are liquid cooling plates, but they are not the same liquid cooling plate.

[0078] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0079] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least part of an element” means part or all of an element.

[0080] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0081] FIG1 is a schematic top view of an energy storage battery module in some embodiments. Figure 2 is a schematic cross-sectional view of a first liquid cooling plate in some embodiments, Figure 3 1 is a schematic cross-sectional view of a first liquid cooling plate near a liquid inlet pipeline in some embodiments, as shown in FIG. Figure 2 , Figure 3 As shown, in this embodiment, an energy storage battery module 10 is provided, including: a plurality of battery cell units 102 and a plurality of first liquid cooling plates 104; the plurality of first liquid cooling plates 104 and the plurality of battery cell units 102 are alternately arranged along a first direction X and are arranged in contact, a plurality of first flow channels 202 are opened in the first liquid cooling plate 104, the first flow channels 202 extend along a second direction Y, and are arranged at intervals along a third direction Z, the first direction X, the second direction Y and the third direction Z intersect in pairs; as an example, the first direction X, the second direction Y and the third direction Z are arranged perpendicularly in pairs. Among the multiple first liquid cooling plates 104, the first flow channels 202 arranged at the same position in the third direction Z are connected in sequence, and the cooling liquid flows from the first flow channel 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 to the first flow channel 202 of the first liquid cooling plate 104 far away from the liquid inlet pipeline 106; each of the first flow channels 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 is respectively connected to the liquid inlet pipeline 106.

[0082] At least one of the opposite sides of the battery cell unit 102 in the first direction X (the surface of the battery cell unit 102 in the plane where the second direction Y and the third direction Z are located) is in contact with the first liquid cooling plate 104. The first liquid cooling plate 104 can cool the battery cell unit 102 from the side, take away the heat generated by the battery cell unit 102, and reduce the temperature difference of the battery cell unit 102 in the third direction Z.

[0083] The number of first flow channels 202 provided in multiple first liquid cooling plates 104 is the same, and the first flow channels 202 located in the same first liquid cooling plate 104 are not connected. The first flow channels 202 in the first liquid cooling plate 104 are arranged in a third direction Z, and the first flow channels 202 of the same arrangement in different first liquid cooling plates 104 are connected in sequence from close to the liquid inlet pipeline 106 to away from the liquid inlet pipeline 106 to form a passage, so that the coolant flows through different first liquid cooling plates 104 in sequence. Exemplarily, FIG1 shows the flow of the coolant between the first flow channels 202 of different first liquid cooling plates 104 when the liquid inlet pipeline 106 is located on one side of the energy storage battery module 10 with dotted lines, and the flow direction of the coolant is shown with arrows.

[0084] Each first flow channel 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 is connected to the liquid inlet pipeline 106, so that when the first flow channel 202 and the liquid inlet pipeline 106 are connected, the coolant enters the first flow channel 202 from the liquid inlet pipeline 106 and flows through each first liquid cooling plate 104 in the energy storage battery module 10 in the same order in sequence. As an example, Figure 3 The connection between the plurality of first flow channels 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 and the liquid inlet pipeline 106 is shown, and the arrows show the flow direction of the coolant when the first flow channels 202 are connected to the liquid inlet pipeline 106 .

[0085] In the embodiments of the present disclosure, the number and position of the liquid inlet pipelines 106 are not limited, as long as the coolant flows from the first liquid cooling plate 104 close to the liquid inlet pipeline 106 to the first liquid cooling plate 104 far from the liquid inlet pipeline 106 for the same liquid inlet pipeline 106 .

[0086] It is understandable that in the case of multiple liquid inlet pipelines 106, there are multiple first liquid cooling plates 104 close to the liquid inlet pipelines 106. At this time, each first liquid cooling plate 104 close to the liquid inlet pipeline 106 has a part of the first flow channel 202 connected to the adjacent liquid inlet pipeline 106, and the arrangement of the first flow channels 202 connecting different first liquid cooling plates 104 to adjacent liquid inlet pipelines 106 in the third direction Z is different.

[0087] In the above energy storage battery module, the side of the battery cell unit 102 in the first direction X is in contact with the first liquid cooling plate 104. The cooling liquid in the first flow channel 202 arranged at intervals along the third direction Z opened in the first liquid cooling plate 104 can cool the battery cell unit 102 in the third direction Z, thereby reducing the temperature difference of the battery cell unit 102 in the third direction Z, improving the cooling effect of the cooling liquid, and increasing the service life of the energy storage battery module.

[0088] As an example, in the first direction X, side plates are provided at both ends of the energy storage battery module 10 , and the battery cell units 102 in the energy storage battery module 10 can be protected by the side plates.

[0089] Figure 4 Schematic diagrams of top views of energy storage battery modules in other embodiments, such as Figure 4 As shown, in some embodiments, the opposite sides of the battery cell unit 102 in the first direction X are in contact with the first liquid cooling plate 104, and the first liquid cooling plate 104 can cool the battery cell unit 102 from two sides, which has a better cooling effect on the battery cell unit 102, and further increases the service life of the energy storage battery module 10. At this time, the first liquid cooling plates 104 located at both ends of the energy storage battery module 10 can be used as the side plates of the energy storage battery module 10. At this time, the side plates of the energy storage battery module 10 and the first liquid cooling plates 104 located at both ends of the energy storage battery module 10 are integrally formed. The size of the energy storage battery module 10 is reduced, and the cost of the energy storage battery module 10 is reduced.

[0090] like Figure 3 , Figure 4 As shown, in one embodiment, the energy storage battery module 10 further includes: a temperature detection module 108 and a control module 110; the temperature detection module 108 is used to detect the cell temperature of the top surface of the cell unit 102 in the third direction Z, and generate a temperature signal according to the cell temperature; the control module 110 is connected to the temperature detection module 108, and is used to receive and control the cooling parameters of the coolant in each of the first flow channels 202 of the first liquid cooling plate 104 near the liquid inlet pipeline 106 from the liquid inlet pipeline 106 according to the temperature signal, so as to adjust the temperature of the cell unit 102, and the cooling parameters are cooling-related parameters corresponding to the coolant, such as flow parameters characterizing the flow rate of the coolant, temperature parameters characterizing the temperature of the coolant, etc. The temperature difference of the cell unit 102 in the third direction Z is further reduced, and the temperature uniformity of the cell unit 102 is improved.

[0091] The coolant flows from the direction close to the liquid inlet pipeline 106 to the direction away from the liquid inlet pipeline 106, the temperature of the coolant gradually increases, and the cooling rate of the battery cell 102 gradually decreases. Among the multiple battery cells 102 of the energy storage battery module 10, the temperature of the top surface of the battery cell 102 located away from the liquid inlet pipeline 106 is the highest. As an example, the test point of the temperature detection module 108 is located on the top surface of the battery cell 102 away from the liquid inlet pipeline 106. The temperature signal generated by the temperature detection module 108 can represent the maximum value of the top surface temperature of the battery cell 102 of the energy storage battery module 10. The cooling parameters of the coolant entering the first liquid cold plate 104 close to the liquid inlet pipeline 106 from the liquid inlet pipeline 106 are controlled by the maximum value of the top surface temperature of the battery cell 102 to adjust the temperature of the battery cell 102, so as to avoid the problem that the battery cell 102 of the energy storage battery module 10 has an overly high temperature, which affects the service life of the energy storage battery module 10.

[0092] As an example, the temperature detection module 108 is disposed on the top surface of the battery cell unit 102 and is in contact with the top surface of the battery cell unit 102 . For example, the temperature detection module 108 includes a temperature sensor.

[0093] like Figure 3 , Figure 4 As shown, in one embodiment, the cooling parameter includes a flow parameter of the coolant, and the energy storage battery module 10 also includes: a plurality of regulating valves 112, the plurality of regulating valves 112 and the plurality of first flow channels 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 are respectively arranged correspondingly; the plurality of regulating valves 112 are connected to the control module 110; and are used to adjust the cooling parameter of the coolant entering the corresponding first flow channel 202 to adjust the temperature of the battery cell unit 102; wherein the control module 110 is used to control the opening degree of each regulating valve 112 according to the temperature signal to adjust the flow parameter of the coolant entering each first flow channel 202.

[0094] The number of regulating valves 112 is the same as the number of first flow channels 202 in the first liquid cooling plate 104. Multiple regulating valves 112 are respectively arranged corresponding to multiple first flow channels 202 in the same first liquid cooling plate 104. The regulating valves 112 are arranged between the liquid inlet pipeline 106 and the first flow channels 202. The control module 110 controls the opening degree of each regulating valve 112 according to the temperature signal of the battery cell unit 102, thereby adjusting the flow parameters of the coolant entering each first flow channel 202. The flow parameters of the coolant in the first flow channel 202 limit the cooling of the side of the battery cell unit 102 in contact with the first flow channel 202 by the coolant. By adjusting the flow parameters, the cooling of different positions of the battery cell unit 102 in contact with the first flow channel 202 in the third direction Z can be changed, thereby changing the distribution of the temperature of the battery cell unit 102 in the third direction Z, so as to achieve the purpose of adjusting the temperature of the battery cell unit 102. As an example, the regulating valve 112 includes a solenoid valve.

[0095] like Figure 3 As shown, in one embodiment, along the third direction Z, the plurality of first flow channels 202 are divided into a first part 1 close to the top surface of the battery cell unit 102, a second part 2 away from the top surface of the battery cell unit 102, and a third part 3 located between the first part 1 and the second part 2, the first part 1 and the second part 2 are disconnected from the liquid inlet pipeline 106 respectively, and the third part 3 is connected to the liquid inlet pipeline 106; wherein, the control module 110 is used to control the first part 1 to be connected to the liquid inlet pipeline 106 when the temperature signal is greater than the preset temperature signal. By controlling the first flow channel 202 of the first part 1 to be connected to the liquid inlet pipeline 106, the coolant can enter the first flow channel 202 of the first part 1, and the side of the battery cell unit 102 corresponding to the first part 1 is cooled, thereby further cooling the battery cell unit 102, so that the temperature of the top surface of the battery cell unit 102 is reduced, the temperature signal is reduced, and the influence of the heat generated by the battery cell unit 102 on the service life of the energy storage battery module 10 is reduced.

[0096] As an example, the first part 1 includes several first flow channels 202 close to the battery cell unit 102 in the third direction Z, the second part 2 includes several first flow channels 202 away from the battery cell unit 102 in the third direction Z, and the third part 3 includes several first flow channels 202 located between the first part 1 and the second part 2 in the third direction Z. The number of first flow channels 202 between any two of the first part 1, the second part 2 and the third part 3 may be the same or different.

[0097] The first flow channels 202 in the first part 1 and the second part 2 are disconnected from the liquid inlet pipeline 106, and the coolant cannot enter the first flow channels 202 in the first part 1 and the second part 2. The first flow channels 202 in the third part 3 are connected to the liquid inlet pipeline 106, and the coolant can enter the first flow channels 202 in the third part 3. The coolant cools the battery cell 102 through the side of the battery cell 102 and the part corresponding to the third part 3. The preset temperature corresponding to the preset temperature signal is the temperature of the top surface of the battery cell 102 which has no effect on the service life of the energy storage battery module 10. When the temperature signal of the top surface of the battery cell 102 is greater than the preset temperature signal, it is determined that the temperature of the battery cell 102 will affect the service life of the energy storage battery module 10, and the temperature of the battery cell 102 needs to be further reduced. The control module 110 controls the number of first flow channels 202 in the first part 1 connected to the liquid inlet pipeline 106 according to the temperature signal, so that the coolant in the liquid inlet pipeline 106 enters the first flow channel 202 in the first part 1 connected to the liquid inlet pipeline 106, and cools the battery cell 102 through the side of the battery cell 102 and the part corresponding to the first flow channel 202 in the first part 1 where the coolant exists, thereby reducing the temperature signal until the detected temperature signal is less than or equal to the preset temperature signal.

[0098] Figure 5 Schematic diagrams of top views of energy storage battery modules in some other embodiments, such as Figure 5 As shown, in one embodiment, the temperature detection module 108 is also used to detect the battery cell temperature at multiple positions on the top surface of the battery cell unit 102 and generate multiple temperature signals; the control module 110 is also used to generate a temperature difference signal based on the multiple temperature signals, and when each of the temperature signals is less than or equal to the preset temperature signal, and the temperature difference signal is greater than the preset temperature difference signal, the third part 3 is controlled to be connected with the liquid inlet pipeline 106, and the cooling parameters of the coolant entering the first flow channel 202 of the third part 3 are adjusted to reduce the temperature difference signal, eliminate the deviation of the battery cell temperature at different positions on the top surface of different battery cell units 102, and improve the cooling effect of the energy storage battery module 10.

[0099] As an example, when the temperature detection module 108 detects the battery cell temperatures at multiple positions on the top surface of the battery cell unit 102, the positions corresponding to the battery cell temperatures include positions on the top surface of the battery cell unit 102 close to the liquid inlet pipeline 106 (which can reflect the minimum value of the battery cell temperature in the energy storage battery module 10) and positions on the top surface of the battery cell unit 102 away from the liquid inlet pipeline 106 (which can reflect the maximum value of the battery cell temperature in the energy storage battery module 10). At this time, the temperature difference signal can represent the maximum deviation of the battery cell temperature of the battery cell unit 102 in the energy storage battery module 10. After reducing the temperature difference signal according to this setting, the deviation between the temperature signals at different positions of the energy storage battery module 10 is minimized, and the service life of the energy storage battery module 10 is longest.

[0100] As an example, the control module 110 uses the difference between the maximum value and the minimum value of the multiple temperature signals as the temperature difference signal. This setting can reduce the temperature difference signal to the greatest extent and improve the service life of the energy storage battery module 10.

[0101] Exemplarily, the control module 110 adjusts the flow parameters of the coolant entering each first flow channel 202 of the third part 3 by controlling the opening degree of the regulating valve 112 between the first flow channel 202 of the third part 3 and the liquid inlet pipeline 106, that is, adjusts the cooling parameters of the coolant entering the first flow channel 202 of the third part 3, thereby adjusting the cooling of the battery cell 102 by the coolant in the third direction Z, thereby achieving the purpose of reducing the temperature difference signal.

[0102] In one embodiment, a plurality of the first liquid cooling plates 104 share the liquid inlet pipeline 106. At this time, the coolant enters the first flow channels 202 arranged along the third direction Z from the same liquid inlet pipeline 106. The flow direction of the coolant in the plurality of first flow channels 202 of the same first liquid cooling plate 104 is the same, which simplifies the design difficulty of the energy storage battery module 10 and reduces the cost of the energy storage battery module 10.

[0103] Figure 6 is a cross-sectional schematic diagram of the second liquid cooling plate in some embodiments, Figure 7 Schematic cross-sectional view of the second liquid cooling plate in some other embodiments, such as Figure 5 , Figure 6 , Figure 7As shown, in one embodiment, the energy storage battery module also includes: a second liquid cooling plate 114, in the second direction Y, the second liquid cooling plate 114 is respectively located at the opposite ends of the battery cell unit 102, and a plurality of second flow channels 204 are opened in the second liquid cooling plate 114; the two ends of the plurality of second flow channels 204 extending along the first direction X and arranged at intervals along the third direction Z are respectively connected to the plurality of first flow channels 202 of two adjacent first liquid cooling plates 104, so that the coolant flows between different first liquid cooling plates 104.

[0104] like Figure 5 , Figure 6 , Figure 7 As shown, the second liquid cooling plate 114 includes a second liquid cooling plate 1141 and a second liquid cooling plate 1142; the second liquid cooling plate 1141 and the second liquid cooling plate 1142 are respectively located at opposite ends of the first liquid cooling plate 104, and the number of second flow channels 204 arranged in a row along the third direction Z in the second liquid cooling plate 1141 and the second liquid cooling plate 1142 is the same as the number of first flow channels 202 in the first liquid cooling plate 104. The positions of the second flow channels 204 in the second liquid cooling plate 1141 and the second liquid cooling plate 1142 are determined by the position of the first flow channels 202 in the first liquid cooling plate 104 and the flow direction of the coolant. A plurality of columns of second flow channels 204 arranged at intervals along the first direction X are provided in the liquid cooling plate 1 141 and the second liquid cooling plate 2 1142. The number of columns of the second flow channels 204 is determined by the number of the first liquid cooling plates 104 and the flow direction of the coolant. The first flow channels 202 in the first liquid cooling plate 104 are connected through the second flow channels 204 in the second liquid cooling plate 1 1141, so that the coolant in the liquid inlet pipeline 106 flows from the first flow channel 202 in the first liquid cooling plate 104 close to the liquid inlet pipeline 106 to the first flow channel 202 in the first liquid cooling plate 104 far from the liquid inlet pipeline 106, and cools the battery cell unit 102 during the flow.

[0105] Figure 8 is a schematic side view of an energy storage battery module in some embodiments, Fig. 9 is a side view schematic diagram of an energy storage battery module without a second liquid cooling plate, such as Figure 8 , Fig. 9 As shown, in one embodiment, the battery cell unit 102 includes a plurality of battery cells 206 arranged at intervals along the second direction Y, and the relative surfaces of each of the battery cells 206 in the first direction X are respectively in contact with the adjacent first liquid cooling plate 104, and the battery cells 206 in contact with the first liquid cooling plate 104 are cooled by the first liquid cooling plate 104, and the surfaces of each battery cell 206 in the same battery cell unit 102 in contact with the same first liquid cooling plate 104 constitute a side surface of the battery cell unit 102.

[0106] In some embodiments, the height of each first liquid cooling plate 104 in the energy storage battery module in the third direction Z is the same as the height of the battery cell unit 102 in the third direction Z, and the installation of the battery cell unit 102 and the first liquid cooling plate 104 in the energy storage battery module is simple.

[0107] Fig.10 is a schematic side view of a first liquid cooling plate in some embodiments, Fig.11 for Fig.10 A partial enlarged schematic diagram of Fig.12 for Fig.10 The corresponding side view diagram, Fig.13 is a side view schematic diagram of a first liquid cooling plate in another embodiment, Fig.14 for Fig.13 A local enlarged schematic diagram of Figure 8-Figure 14 As shown, in one embodiment, the first liquid cooling plate 104 in the energy storage battery module includes a first liquid cooling plate 1 1041 and a first liquid cooling plate 2 1042. In the third direction Z, the height of the first liquid cooling plate 1 1041 is greater than the height of the first liquid cooling plate 2 1042, and the height of the first liquid cooling plate 2 1042 is equal to the height of the battery cell unit 102. As an example, the number of the first liquid cooling plates 1041 in the energy storage battery module is greater than or equal to 2, that is, there are at least two first liquid cooling plates 104 in the energy storage battery module, the height of which in the third direction Z is greater than the height of the battery cell unit 102 in the third direction Z, and the top surface of the first liquid cooling plate 104 exceeds the top surface of the battery cell unit 102.

[0108] Fig.15 is a schematic side view of an energy storage system in some embodiments, such as Fig.15 As shown, when the energy storage battery modules 10 are stacked in the third direction Z, in the case where multiple energy storage battery modules 10 are stacked in sequence along the third direction Z, the bottom surface of the previous energy storage battery module 10 contacts the top surface of the first liquid cooling plate 1041 of the next energy storage battery module 10 whose height is greater than the battery cell 102. The first liquid cooling plate 1041, which is greater than the battery cell 102, realizes the spacing arrangement of the battery cells 102 in different energy storage battery modules 10, and plays a role in supporting the energy storage battery modules 10, thereby increasing the stability and structural rigidity of the energy storage system including the multiple energy storage battery modules 10 stacked in the third direction Z. In addition, in the process of stacking the multiple energy storage battery modules 10 along the third direction Z, no separate bracket is required to install and fix the energy storage battery modules 10, which is simple to operate and low in cost.

[0109] Exemplarily, the bottom surface of the energy storage battery module 10 includes the bottom surface of the first liquid cooling plate 1041 and the bottom surface of the bottom plate 208 of the energy storage battery module 10 away from the battery cell unit 102 .

[0110] like Figure 8, Fig. 9 and Fig.15 As shown, in one embodiment, in the first direction X, the first liquid cooling plate 1041 which is greater than the height of the battery cell unit 102 is respectively located at both ends of the energy storage battery module 10, so that the stacking of the energy storage battery module 10 in the third direction Z is more stable. In the case of a temperature detection module, the installation accuracy requirement of the temperature detection module is low, and the signal transmission path is simple.

[0111] like Figure 6 , Figure 8 and Fig.15 As shown, in one embodiment, a plurality of liquid inlet holes 210 penetrating the second liquid cooling plate 1141 along the second direction Y are provided at a position near the liquid inlet pipeline 106 of the second liquid cooling plate 1141, and the liquid inlet holes 210 are arranged at intervals along the third direction Z. The plurality of liquid inlet holes 210 are respectively connected to a plurality of first flow channels 202 in the first liquid cooling plate 104 (the first liquid cooling plate 1041 is used as an example in the figure) near the liquid inlet pipeline 106, and the coolant can pass through the second liquid cooling plate 1141 into the first flow channel 202 of the first liquid cooling plate 1041 near the liquid inlet pipeline 106 in the energy storage battery module 10 through the liquid inlet holes 210, and the structure is simple and easy to implement. At this time, the liquid inlet hole 210 is the liquid inlet of the energy storage battery module 10.

[0112] like Figure 6 , Figure 8 , Fig.15 As shown, in one embodiment, a plurality of liquid outlet holes 212 penetrating the second liquid cooling plate 1141 along the second direction Y are provided at a position of the second liquid cooling plate 1141 away from the liquid inlet pipeline 106, and the liquid outlet holes 212 are arranged at intervals along the third direction Z. The plurality of liquid outlet holes 212 are respectively connected to the plurality of first flow channels 202 in the first liquid cooling plate 104 away from the liquid inlet pipeline 106, and the coolant entering the first flow channel 202 of the energy storage battery module 10 can be realized through the liquid outlet holes 212 to flow out of the energy storage battery module 10 through the second liquid cooling plate 1141, and the structure is simple and easy to implement. At this time, the liquid outlet hole 212 is the liquid outlet of the energy storage battery module 10.

[0113] As an example, the liquid inlet hole 210 and the liquid outlet hole 212 shown in the figure are opened in the same second liquid cooling plate 1141, the liquid inlet hole 210 is located at one end of the second liquid cooling plate 1141 close to the liquid inlet pipeline 106, and the liquid outlet hole 212 is located at one end of the second liquid cooling plate 1141 close to the liquid outlet pipeline 214. It can be understood that, affected by the number and position of the battery cell units 102 and the first liquid cooling plate 104, the liquid inlet hole 210 and the liquid outlet hole 212 can be opened in different second liquid cooling plates 114. As long as the coolant enters the first flow channel 202 in the energy storage battery module 10 from the liquid inlet hole 210 and flows out of the first flow channel 202 of the energy storage battery module 10 from the liquid outlet hole 212, it will be fine.

[0114] like Fig.15 As shown, in one embodiment, the energy storage battery module also includes: a plurality of liquid inlet branches 216, one end of the plurality of liquid inlet branches 216 is respectively connected to the plurality of liquid inlet holes 210, and the other end of the plurality of liquid inlet branches 216 is connected to the liquid inlet pipeline 106, so that the first flow channel 202 and the liquid inlet pipeline 106 are connected.

[0115] It can be understood that the regulating valve 112 is located between the liquid inlet branch 216 and the liquid inlet hole 210, and is used to control the connection and disconnection between the liquid inlet branch 216 and the corresponding liquid inlet hole 210, as well as the flow parameters of the coolant during the connection between the liquid inlet branch 216 and the corresponding liquid inlet hole 210.

[0116] Fig.16 is a schematic side view of a second liquid cooling plate in some embodiments, Fig.17 for Fig.16 A local enlarged schematic diagram of Figure 3 , Figure 8-Figure 17 As shown, in one embodiment, the first flow channel 202 penetrates the first liquid cooling plate 104 in the second direction Y, and the second liquid cooling plate 114 is provided with a plurality of connecting holes 218 on a side facing the battery cell unit 102, and the plurality of connecting holes 218 are respectively connected to the ends of the plurality of second flow channels 204; wherein, the opposite ends of the first liquid cooling plate 104 are respectively abutted against the side of the second liquid cooling plate 114 where the connecting holes 218 are provided, and each of the first flow channels 202 of the first liquid cooling plate 104 is respectively correspondingly connected with a row of connecting holes 218 arranged at intervals along the third direction Z, so that the first flow channel 202 is connected with the second flow channel 204, and the connection between the first flow channel 202 and the second flow channel 204 is achieved when the ends of the first flow channel 202 of the first liquid cooling plate 104 and the positions where the connecting holes 218 of the second liquid cooling plate 114 are provided are aligned and abutted through the connecting holes 218, which is simple to operate and low in cost.

[0117] It can be understood that, when the positions of the liquid inlet hole 210, the liquid outlet hole 212 and the connecting hole 218 are the same, the liquid inlet hole 210 and the liquid outlet hole 212 serve as the connecting hole 218. The multiple columns of connecting holes 218 arranged at intervals along the first direction X and the multiple first liquid cooling plates 104 in the energy storage battery module 10 are respectively arranged correspondingly, and the distance between two adjacent columns of connecting holes 218 in the first direction X satisfies that the battery cell unit 102 is close to the side contact of the first liquid cooling plate 104 during the operation of the energy storage battery module 10, so as to cool the battery cell unit 102.

[0118] Furthermore, the battery cell 206 extends along the second direction Y, and the large surface of each battery cell 206 in the battery cell unit 102 is in good contact with the first liquid cooling plate 104. The expansion force of the battery cell unit 102 during operation has little effect on the second liquid cooling plate 114, thereby reducing the risk of connection failure at the connection between the first flow channel 202 in the first liquid cooling plate 104 and the second flow channel 204 in the second liquid cooling plate 114.

[0119] like Fig.15 As shown, in some embodiments, the present application also provides an energy storage system, including: a plurality of energy storage battery modules 10 as described in any of the above items, and the parts that are the same as or corresponding to the embodiments in the above energy storage battery modules 10 will not be repeated below.

[0120] like Fig.15 As shown, in one embodiment, the number of the energy storage battery modules 10 is multiple, and in the third direction Z, the multiple energy storage battery modules 10 are stacked, and the top surface of the battery cell unit 102 in the energy storage battery module 10 is spaced from the bottom surface of the adjacent energy storage battery module 10 to detect the battery cell temperature on the top surface of the battery cell unit 102 of each stacked energy storage battery module 10, so as to accurately control the temperature of each energy storage battery module 10 stacked in the third direction Z in the energy storage system and reduce the temperature difference between each energy storage battery module 10 in the energy storage system.

[0121] like Fig.15 As shown, in one embodiment, in the third direction Z, the top surface of the first liquid cooling plate 1041 in the energy storage battery module 10 which is higher than the battery cell unit 102 contacts the bottom surface of the adjacent energy storage battery module 10 .

[0122] like Figure 10-15As shown, the bottom surface of the first liquid cooling plate 1041 is flush with the bottom surface of the bottom plate 208 away from the battery cell unit 102, and the orthographic projections of the first liquid cooling plate 1041 in each energy storage battery module 10 arranged in the third direction Z in the plane where the first direction X and the second direction Y are located coincide with each other. The first liquid cooling plate 1041 is provided with side plate edge beams 302 extending along the second direction Y at both ends in the third direction Z. In the first direction X, the side plate edge beams 302 extend in a direction away from the side plate flow channel side 312, and the side plate flow channel side 312 is a side of the first liquid cooling plate 1041 that contacts the side of the battery cell unit 102 to cool the battery cell unit 102. In the energy storage system, when multiple energy storage battery modules 10 are stacked in sequence along the third direction Z, the first liquid cooling plate 1041 of the previous energy storage battery module 10 is close to the side plate bottom mounting hole 304 on the side plate side beam 302 of the next energy storage battery module 10 and the side plate top mounting hole 306 on the side plate side beam 302 of the next energy storage battery module 10 are correspondingly arranged, and the detachable connection between the previous energy storage battery module 10 and the next energy storage battery module 10 is realized by bolts penetrating the side plate bottom mounting hole 304 and the side plate top mounting hole 306. The side plate positioning pin 308 on the side plate side beam 302 of the next energy storage battery module 10 close to the previous energy storage battery module 10 is inserted into the side plate side beam positioning hole 316 on the side plate side beam 302 of the first liquid cooling plate 1041 of the previous energy storage battery module 10 close to the next energy storage battery module 10, so as to realize the positioning and connection between the previous energy storage battery module 10 and the next energy storage battery module 10. The side plate positioning pin 308 and the side plate side beam positioning hole 316 play a positioning role, which is convenient for the stacking of each energy storage battery module 10 in the energy storage system. The energy storage battery module 10 at the bottom of the energy storage system is fixed on the crossbeam at the bottom of the energy storage system.

[0123] See also Fig.10 The liquid cooling plates at both ends of the energy storage battery module 10 and the side plates of the energy storage battery module 10 are integrally formed to form a first liquid cooling plate 1041. At this time, the first liquid cooling plate 1041 has a side plate cavity 314.

[0124] like Fig.15 As shown, in one embodiment, a plurality of the stacked energy storage battery modules 10 share a common liquid inlet pipeline 106 and / or a common liquid outlet pipeline 214, so that the energy storage system has a small size and a compact structure.

[0125] like Figure 8 , Fig.15As shown, in one embodiment, two adjacent energy storage battery modules 10 are arranged at intervals along the first direction X to form an energy storage battery unit; the liquid outlet (i.e., the liquid outlet hole 212 in the figure) of the energy storage battery module 10 close to the liquid inlet pipeline 106 in the energy storage battery unit is connected to the multiple first flow channels 202 of the first liquid cooling plate 104 of the energy storage battery module 10 far away from the liquid inlet pipeline 106. The first liquid cooling plate 104 refers to the first liquid cooling plates 104 in the same energy storage battery module 10 arranged in sequence in the direction away from the liquid inlet pipeline 106. The first liquid cooling plate 104 located in the first position is the first first liquid cooling plate 104, and the first liquid cooling plate 104 located in the last position is the last first liquid cooling plate 104.

[0126] like Figure 8 , Fig.15 As shown, in one embodiment, the multiple first flow channels 202 of the last first liquid cooling plate 104 of the energy storage battery module 10 close to the liquid inlet pipeline 106 in the energy storage battery unit are respectively connected with the multiple first flow channels 202 of the first first liquid cooling plate 104 of the energy storage battery module 10 away from the liquid inlet pipeline 106, so that the liquid outlet (i.e., the liquid outlet hole 212 in the figure) of the energy storage battery module 10 close to the liquid inlet pipeline 106 is connected with the multiple first flow channels 202 of the first first liquid cooling plate 104 of the energy storage battery module 10 away from the liquid inlet pipeline 106.

[0127] like Fig.15 As shown, in some embodiments, the energy storage system further includes: a plurality of module connecting pipes 402, the plurality of module connecting pipes 402 and the plurality of liquid outlets (i.e., the liquid outlet holes 212 in the figure) are respectively arranged correspondingly, and the module connecting pipes 402 are used to realize the flow of coolant between adjacent energy storage battery modules 10 in the same energy storage battery unit.

[0128] like Fig.15 As shown, in some embodiments, the energy storage system further includes: a plurality of liquid outlet branches 404, one end of each of the plurality of liquid outlet branches 404 is respectively connected to a plurality of liquid outlet holes (i.e., the liquid outlet holes 212 in the figure) of the energy storage battery module 10 close to the liquid outlet pipeline 214, and the other end of each of the plurality of liquid outlet branches 404 is connected to the liquid outlet pipeline 214, so that the first flow channel 202 is connected to the liquid outlet pipeline 214, so that the coolant flows out of the energy storage battery module 10 into the liquid outlet pipeline 214.

[0129] like Fig.15 As shown, in one embodiment, in the third direction Z, a plurality of the energy storage battery cells are stacked, and the top surface of the battery cell 102 of the energy storage battery module 10 in the energy storage battery cell is spaced apart from the bottom surface of the energy storage battery module 10 in the adjacent energy storage battery cell.

[0130] like Fig.15 As shown, in one embodiment, the energy storage battery module 10 of multiple energy storage battery cells close to the liquid inlet pipeline 106 shares the liquid inlet pipeline 106; and / or the energy storage battery module 10 of multiple energy storage battery cells close to the liquid outlet pipeline 214 shares the liquid outlet pipeline 214.

[0131] Fig.18 is a side view schematic diagram of an energy storage system in some embodiments, Fig.19 for Fig.18 The corresponding partial enlarged schematic diagram of the energy storage system is shown in Fig.15 , Fig.18 , Fig.19 In one embodiment, the energy storage system further includes: an energy storage battery rack 116, the energy storage battery rack 116 includes columns 220 arranged at intervals along a first direction X; wherein, in the first direction X, the energy storage battery unit is arranged between adjacent columns 220 and is detachably connected to the columns 220.

[0132] like Fig.18 , Fig.19 As shown, as an example, a plurality of spaced-apart columns 220 arranged along the second direction Y are detachably connected to the energy storage battery cells on adjacent sides in the first direction X, and by increasing the number of columns 220 arranged along the second direction Y, the stability and structural rigidity of the energy storage battery cells in the energy storage system can be increased.

[0133] See also Fig.18 In some embodiments, a plurality of energy storage battery cells are arranged at intervals along the first direction X, and columns 220 are provided between adjacent energy storage battery cells.

[0134] Fig. 20 is a schematic side view of the first connecting member in some embodiments, Fig.21 is a side view of the second connecting member in some embodiments, see Fig.15 , Figure 18-Figure 21, the first liquid cooling plate 1041 of the energy storage battery module 10 is away from the side of the battery cell unit 102 and the adjacent column 220 through the first connector 222. Specifically, the first connector 222 is installed on the side of the first liquid cooling plate 1041 of an energy storage battery module 10 in the energy storage battery unit away from the battery cell unit 102 through the first connector module installation hole 506 on the first connector 222. At this time, the first connector fitting module edge 508 on the first connector 222 is in contact with the first liquid cooling plate 1041; the second connector 224 is installed on the first liquid cooling plate 1041 of another energy storage battery module 10 in the energy storage battery unit away from the battery cell unit through the second connector module installation hole 512 on the second connector 224. On one side of the battery cell unit 102, at this time, the second connector 224 is fitted with the module edge 514 and is in contact with the first liquid cooling plate 1041; after the energy storage battery module 10 is stacked along the third direction Z, the first connector 222 is installed and connected to the adjacent column 220 through the first connector column mounting hole 504, at this time, the first connector is fitted with the column edge 502 and is in contact with the column 220; the second connector 224 is installed and connected to the adjacent column 220 through the second connector column mounting hole 518, at this time, the second connector is fitted with the column edge 520 and is in contact with the column 220, the first connector 222 also includes a first connector rib 510, and the second connector 224 also includes a second connector rib 516.

[0135] Fig. 22 FIG. 1 is a schematic diagram of a cooling method for an energy storage battery module in some embodiments, see FIG. Fig. 22 In this embodiment, a cooling method for an energy storage battery module 10 is provided, wherein the energy storage battery module 10 comprises: a plurality of battery cell units 102 and a plurality of first liquid cooling plates 104, wherein the plurality of first liquid cooling plates 104 and the plurality of battery cell units 102 are alternately arranged along a first direction X and are arranged in contact with each other, wherein the first liquid cooling plates 104 are provided with a plurality of first flow channels 202, wherein the first flow channels 202 extend along a second direction Y and are arranged at intervals along a third direction Z, wherein the first direction X, the second direction Y and the third direction Z intersect each other. Among the plurality of first liquid cooling plates 104, the first flow channels 202 arranged at the same position in the third direction Z are connected in sequence, and the cooling liquid flows from the first flow channel 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 to the first flow channel 202 of the first liquid cooling plate 104 far from the liquid inlet pipeline 106; each of the first flow channels 202 of the first liquid cooling plate 104 close to the liquid inlet pipeline 106 is respectively connected to the liquid inlet pipeline 106; the cooling method includes:

[0136] S102 , detecting a cell temperature of a top surface of the cell unit in a third direction, and generating a temperature signal.

[0137] Specifically, the temperature detection module 108 is used to detect the battery cell temperature of the top surface of the battery cell unit 102 in the third direction Z, and a temperature signal is generated according to the battery cell temperature.

[0138] S104, according to the temperature signal, controlling the cooling parameters of the coolant entering the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline from the liquid inlet pipeline to adjust the temperature of the battery cell unit.

[0139] Specifically, the control module 110 receives and controls the cooling parameters of the coolant in each of the first flow channels 202 of the first liquid cooling plate 104 near the liquid inlet pipeline 106 from the liquid inlet pipeline 106 according to the temperature signal, so as to adjust the temperature of the battery cell unit 102 .

[0140] In the cooling method of the above-mentioned energy storage battery module, the cooling parameters of the coolant in each first flow channel 202 entering the first liquid cooling plate 104 are controlled by a temperature signal generated according to the battery cell temperature on the top surface of the battery cell unit 102, and the cooling of the battery cell unit 102 by the coolant in the third direction Z is adjusted to reduce the temperature difference of the battery cell unit 102 in the third direction Z, thereby improving the cooling effect of the coolant and increasing the service life of the energy storage battery module 10.

[0141] In one embodiment, along the third direction Z, multiple first flow channels 202 are divided into a first part 1 close to the top surface of the battery cell unit 102, a second part 2 away from the top surface of the battery cell unit 102, and a third part 3 located between the first part 1 and the second part 2, the first part 1 and the second part 2 are respectively disconnected from the liquid inlet pipeline 106, and the third part 3 is connected to the liquid inlet pipeline 106; the cooling method includes: when the temperature signal is greater than a preset temperature signal, controlling the first part 1 to be connected to the liquid inlet pipeline 106.

[0142] In one embodiment, the cooling method of the energy storage battery module further includes: steps S202-S206.

[0143] S202, detecting the battery cell temperatures at multiple locations on the top surface of the battery cell unit, and generating multiple temperature signals.

[0144] Specifically, the BMS (battery management system) detects the cell temperatures at multiple different locations on the top surface of the same battery cell unit 102, or detects the cell temperatures on the top surfaces of multiple different battery cell units 102, and generates multiple temperature signals corresponding to the multiple battery cell temperatures based on the detected multiple battery cell temperatures.

[0145] S204: Generate a temperature difference signal according to the multiple temperature signals.

[0146] Specifically, the BMS generates a temperature difference signal according to a plurality of temperature signals. As an example, the temperature difference signal can be used to characterize a maximum deviation of the cell temperature of the cell unit 102 in the energy storage battery module 10 .

[0147] S206, when each of the temperature signals is less than or equal to the preset temperature signal, and the temperature difference signal is greater than the preset temperature difference signal, control the third part 3 to be connected with the liquid inlet pipeline, and adjust the cooling parameters of the coolant entering the first flow channel 202 of the third part 3.

[0148] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0149] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of any of the above-mentioned methods for cooling an energy storage battery module are implemented.

[0150] The present disclosure also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned methods for cooling an energy storage battery module are implemented.

[0151] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for cooling an energy storage battery module.

[0152] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0153] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0154] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy storage battery module, characterized in that: include: A plurality of battery cell units and a plurality of first liquid cooling plates; A plurality of the first liquid cooling plates and a plurality of the battery core units are alternately arranged along a first direction and are arranged in contact with each other. A plurality of first flow channels are opened in the first liquid cooling plate. The first flow channels extend along a second direction and are arranged at intervals along a third direction. The first direction, the second direction and the third direction intersect each other. Among the multiple first liquid cooling plates, the first flow channels arranged at the same position in the third direction are connected in sequence, and the cooling liquid flows from the first flow channel of the first liquid cooling plate close to the liquid inlet pipeline to the first flow channel of the first liquid cooling plate far from the liquid inlet pipeline; each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is respectively connected to the liquid inlet pipeline.

2. The energy storage battery module according to claim 1, characterized in that: Also includes: A temperature detection module, used to detect the cell temperature of the top surface of the cell unit in the third direction and generate a temperature signal; A control module is connected to the temperature detection module and is used to control the cooling parameters of the coolant in each of the first flow channels of the first liquid cooling plate near the liquid inlet pipeline from the liquid inlet pipeline according to the temperature signal, so as to adjust the temperature of the battery cell unit.

3. The energy storage battery module according to claim 2, characterized in that: The cooling parameters include the flow parameters of the coolant, and also include: A plurality of regulating valves, the plurality of regulating valves and the plurality of first flow channels of the first liquid cooling plate near the liquid inlet pipeline are respectively arranged correspondingly; the plurality of regulating valves are connected to the control module; and are used to adjust the cooling parameters of the coolant entering the corresponding first flow channels to adjust the temperature of the battery cell unit; The control module is used to control the opening degree of each regulating valve according to the temperature signal to adjust the flow parameter of the coolant entering each first flow channel.

4. The energy storage battery module according to claim 2, characterized in that: Along the third direction, the plurality of first flow channels are divided into a first portion close to the top surface of the battery cell unit, a second portion away from the top surface of the battery cell unit, and a third portion located between the first portion and the second portion, the first portion and the second portion are respectively disconnected from the liquid inlet pipeline, and the third portion is connected to the liquid inlet pipeline; Wherein, the control module is used to control the first part to be connected to the liquid inlet pipeline when the temperature signal is greater than a preset temperature signal.

5. The energy storage battery module according to claim 4, characterized in that: The temperature detection module is also used to detect the battery cell temperature at multiple locations on the top surface of the battery cell unit and generate multiple temperature signals; The control module is also used to generate a temperature difference signal based on multiple temperature signals. When each of the temperature signals is less than or equal to the preset temperature signal and the temperature difference signal is greater than the preset temperature difference signal, the control module controls the third part to be connected to the liquid inlet pipeline and adjusts the cooling parameters of the coolant in the first flow channel entering the third part.

6. The energy storage battery module according to claim 1, characterized in that: The plurality of first liquid cooling plates share the liquid inlet pipeline; the flow directions of the cooling liquid in the plurality of first flow channels of the same first liquid cooling plate are the same.

7. The energy storage battery module according to claim 1, characterized in that: At least two of the first liquid cooling plates have a height in the third direction greater than a height of the battery cell unit in the third direction.

8. The energy storage battery module according to claim 7, characterized in that: In the first direction, the first liquid cooling plates, which are greater than the height of the battery core units, are respectively located at two ends of the energy storage battery module.

9. The energy storage battery module according to claim 1, characterized in that: The energy storage battery module also includes: A second liquid cooling plate, in the second direction, the second liquid cooling plates are respectively located at opposite ends of the battery cell unit, and a plurality of second flow channels are opened in the second liquid cooling plate; the ends of the plurality of second flow channels extending along the first direction and arranged at intervals along the third direction are respectively connected to the plurality of first flow channels of two adjacent first liquid cooling plates, so that the coolant flows between different first liquid cooling plates.

10. The energy storage battery module according to claim 9, characterized in that: The first flow channel penetrates the first liquid cooling plate in the second direction, and a plurality of communication holes are formed on a side of the second liquid cooling plate facing the battery cell unit, and the plurality of communication holes are respectively connected to ends of the plurality of second flow channels; The opposite ends of the first liquid cooling plate are respectively abutted against one side of the second liquid cooling plate where the connecting hole is opened, and the first flow channels of the first liquid cooling plate are respectively connected to a row of connecting holes arranged at intervals along the third direction, so that the first flow channels are connected to the second flow channels.

11. The energy storage battery module according to claim 9, characterized in that: A plurality of liquid inlet holes penetrating the second liquid cooling plate along the second direction are provided at a position of the second liquid cooling plate near the liquid inlet pipeline, the liquid inlet holes are arranged at intervals along the third direction, and the plurality of liquid inlet holes are respectively connected to a plurality of first flow channels in the first liquid cooling plate near the liquid inlet pipeline.

12. The energy storage battery module according to claim 11, characterized in that: The energy storage battery module also includes: A plurality of liquid inlet branches, one end of each of the plurality of liquid inlet branches is connected to the plurality of liquid inlet holes respectively, and the other end of each of the plurality of liquid inlet branches is communicated with the liquid inlet pipeline, so that the first flow channel is connected to the liquid inlet pipeline.

13. The energy storage battery module according to claim 9, characterized in that: A plurality of liquid outlet holes penetrating the second liquid cooling plate along the second direction are provided at a position of the second liquid cooling plate away from the liquid inlet pipeline. The liquid outlet holes are arranged at intervals along the third direction. The plurality of liquid outlet holes are respectively connected to a plurality of first flow channels in the first liquid cooling plate away from the liquid inlet pipeline.

14. The energy storage battery module according to claim 1, characterized in that: The battery cell unit includes a plurality of battery cells arranged at intervals along the second direction, and opposite surfaces of each of the battery cells in the first direction are in contact with adjacent first liquid cooling plates respectively.

15. An energy storage system, characterized in that: include: A plurality of energy storage battery modules according to any one of claims 1 to 14.

16. The energy storage system according to claim 15, characterized in that: There are multiple energy storage battery modules. In the third direction, multiple energy storage battery modules are stacked, and the top surface of the battery cell unit in the energy storage battery module is spaced apart from the bottom surface of the adjacent energy storage battery module.

17. The energy storage system according to claim 16, characterized in that: In the third direction, the top surface of the first liquid cooling plate in the energy storage battery module, which is taller than the battery cell unit, contacts the bottom surface of the adjacent energy storage battery module.

18. The energy storage system according to claim 16, characterized in that: The plurality of stacked energy storage battery modules share a common liquid inlet pipeline and / or a common liquid outlet pipeline.

19. The energy storage system according to claim 15, characterized in that: Two adjacent energy storage battery modules are arranged at intervals along the first direction to form an energy storage battery unit; the liquid outlet of the energy storage battery module close to the liquid inlet pipeline in the energy storage battery unit is connected to multiple first flow channels of the first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline.

20. The energy storage system according to claim 19, characterized in that: The multiple first flow channels of the last first liquid cooling plate of the energy storage battery module close to the liquid inlet pipeline in the energy storage battery unit are respectively connected with the multiple first flow channels of the first first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline, so that the liquid outlet of the energy storage battery module close to the liquid inlet pipeline is connected with the multiple first flow channels of the first first liquid cooling plate of the energy storage battery module away from the liquid inlet pipeline.

21. The energy storage system according to claim 19, characterized in that: In the third direction, a plurality of the energy storage battery cells are stacked, and a top surface of a cell unit of an energy storage battery module in the energy storage battery cell is spaced apart from a bottom surface of the energy storage battery module in an adjacent energy storage battery cell.

22. The energy storage system according to claim 21, characterized in that: The energy storage battery modules of the plurality of energy storage battery units close to the liquid inlet pipeline share the liquid inlet pipeline; And / or the energy storage battery modules of the multiple energy storage battery units close to the liquid outlet pipeline share the liquid outlet pipeline.

23. The energy storage system according to claim 21, characterized in that: The energy storage system further comprises: An energy storage battery rack, comprising columns spaced apart along a first direction; Wherein, in the first direction, the energy storage battery unit is arranged between adjacent columns and is detachably connected to the columns.

24. A cooling method for an energy storage battery module, characterized in that: The energy storage battery module comprises: a plurality of battery cells and a plurality of first liquid cooling plates, the plurality of first liquid cooling plates and the plurality of battery cells are alternately arranged along a first direction and are arranged in contact, a plurality of first flow channels are opened in the first liquid cooling plate, the first flow channels extend along a second direction and are arranged at intervals along a third direction, and the first direction, the second direction and the third direction intersect each other; among the plurality of first liquid cooling plates, the first flow channels arranged at the same position in the third direction are connected in sequence, and the coolant flows from the first flow channel of the first liquid cooling plate close to the liquid inlet pipeline to the first flow channel of the first liquid cooling plate away from the liquid inlet pipeline; each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is connected to the liquid inlet pipeline respectively; the cooling method comprises: detecting a cell temperature of a top surface of the cell unit in the third direction and generating a temperature signal; According to the temperature signal, the cooling parameter of the coolant entering from the liquid inlet pipeline into each of the first flow channels of the first liquid cooling plate close to the liquid inlet pipeline is controlled to adjust the temperature of the battery cell unit.

25. The cooling method according to claim 24, characterized in that: Along the third direction, the plurality of first flow channels are divided into a first part close to the top surface of the battery cell unit, a second part away from the top surface of the battery cell unit, and a third part located between the first part and the second part, the first part and the second part are respectively disconnected from the liquid inlet pipeline, and the third part is connected to the liquid inlet pipeline; the cooling method comprises: When the temperature signal is greater than a preset temperature signal, the first part is controlled to be connected to the liquid inlet pipeline.

26. The cooling method according to claim 25, characterized in that: The cooling method further comprises: Detecting the battery cell temperature at multiple locations on the top surface of the battery cell unit and generating multiple temperature signals; generating a temperature difference signal according to the multiple temperature signals; When each of the temperature signals is less than or equal to the preset temperature signal and the temperature difference signal is greater than the preset temperature difference signal, the third part is controlled to be connected to the liquid inlet pipeline, and the cooling parameters of the coolant entering the first flow channel of the third part are adjusted.

27. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for cooling the energy storage battery module according to any one of claims 24 to 26 are implemented.

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