Energy storage system

Abstract

The utility model provides an energy storage system which comprises a cabinet body, a liquid inlet and outlet pipeline and a plurality of battery cell brackets, the liquid inlet and outlet pipeline and the battery cell brackets are arranged in the cabinet body, the battery cell brackets are sequentially arranged in the vertical direction, the liquid inlet and outlet pipeline is located on one side of each battery cell bracket, and each battery cell bracket comprises a cold plate and end plates arranged at the two ends of the cold plate. A mounting area for mounting a battery cell module is defined by each cold plate and the corresponding end plates at the two ends, and a communication channel for communicating the liquid inlet and outlet pipeline with the corresponding cold plate is arranged on the end plate, close to the liquid inlet and outlet pipeline, in each battery cell bracket. According to the energy storage system, the communication channel for communicating the liquid inlet and outlet pipeline with the cold plate is integrated on the end plate, so that the use of pipelines can be reduced, the problems that the whole energy storage system is heavier, the cost is high and the like are solved, and cost reduction and light weight realization are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an energy storage system. Background Art

[0002] The energy storage system is a new type of energy management system that stores a large number of lithium-ion batteries in cabinets or containers, collects and stores excess energy that is temporarily unused for a period of time in some way, and releases it when needed in the future. It has the functions of smooth transition, peak shaving and valley filling, frequency and voltage regulation, and has the advantages of easy installation, easy transportation and modularity.

[0003] The existing energy storage system consists of three levels: battery cells, battery packs, and energy storage cabinets. The energy storage system thus constructed has a high volume energy density. In addition, common energy storage systems also have problems such as complex piping structures, difficult assembly, and large amounts of piping used, which results in the overall weight of the energy storage system and high costs, which is not conducive to cost reduction and lightweight design. In addition, due to the complex piping structure, there are also problems such as high liquid cooling resistance and high risk of leakage, which cannot meet design requirements. Utility Model Content

[0004] In view of this, the utility model aims to propose an energy storage system, which can solve the problems of overall weight and high cost of the energy storage system, so as to reduce costs and achieve lightweight.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An energy storage system comprises a cabinet, and liquid inlet and outlet pipelines and a plurality of battery cell brackets arranged in the cabinet, wherein the plurality of battery cell brackets are arranged in sequence along the up and down direction, and the liquid inlet and outlet pipelines are located on one side of each battery cell bracket.

[0007] Each of the battery cell brackets includes a cold plate and end plates arranged at both ends of the cold plate. Each of the cold plates and the corresponding end plates at both ends form an installation area for installing the battery cell module; on the end plate of each battery cell bracket close to the inlet and outlet liquid pipelines, a connecting channel connecting the inlet and outlet liquid pipelines and the corresponding cold plate is provided.

[0008] Furthermore, each of the cold plates is plug-connected with the corresponding end plates at both ends; and / or, along the up-down direction, two adjacent end plates are plug-connected.

[0009] Furthermore, in each of the battery cell brackets, each end plate is provided with a first plug-in protrusion arranged along the extension direction of the cold plate, both ends of the cold plate are respectively provided with a first slot, and the first plug-in protrusion on each end plate is inserted into the corresponding first slot.

[0010] Furthermore, each of the connecting channels includes a liquid inlet channel and a liquid outlet channel formed on the corresponding end plate, the liquid inlet channel is connected to the flow channel inlet of the cold plate, and the liquid outlet channel is connected to the flow channel outlet of the cold plate; the inlet and outlet pipelines include an inlet pipeline connected in series with a plurality of three-way valves, and a liquid outlet pipeline connected in series with a plurality of three-way valves, and the outlet of each of the three-way valves in the inlet pipeline is connected one-to-one with each of the liquid inlet channels, and the outlet of each of the three-way valves in the outlet pipeline is connected one-to-one with each of the liquid outlet channels.

[0011] Furthermore, an exhaust valve is provided at the top of the liquid outlet pipeline; and / or the outlet of each of the three-way valves in the liquid inlet pipeline is provided with a first quick-connect connector for plugging into the corresponding liquid inlet channel, and the outlet of each of the three-way valves in the liquid outlet pipeline is provided with a second quick-connect connector for plugging into the corresponding liquid outlet channel.

[0012] Furthermore, the middle portion of the liquid inlet pipeline along the up-down direction is connected to a liquid inlet main pipe; and / or the middle portion of the liquid outlet pipeline along the up-down direction is connected to a liquid outlet main pipe.

[0013] Furthermore, the connecting channels are all Z-shaped and have a first sub-channel and a second sub-channel arranged along the extension direction of the cold plate, and an intermediate channel connecting the first sub-channel and the second sub-channel; the first sub-channel is connected to the inlet and outlet liquid pipelines, and the second sub-channel passes through the first plug-in protrusion along the extension direction of the cold plate and is connected to the flow channel in the cold plate.

[0014] Furthermore, in each of the battery cell brackets, connecting flanges are provided on both sides of the cold plate in the width direction, and side beams corresponding to each of the connecting flanges are connected between the two end plates, and each of the side beams is connected to the corresponding connecting flange via fasteners.

[0015] Furthermore, each of the cold plates, each of the end plates and each of the side beams are made of profiles; and / or, the cross-street surface of the side beam is rectangular.

[0016] Furthermore, each of the battery cell modules is connected to the corresponding cold plate via a thermally conductive structural adhesive; and / or, the cold plate is provided on the top of the topmost battery cell bracket, and each of the battery cell modules is connected to the cold plate above itself via a thermally conductive structural adhesive.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The energy storage system described in the utility model can reduce the use of pipelines by integrating a connecting channel connecting the inlet and outlet liquid pipelines and the cold plate on the end plate, which is beneficial to cost reduction and lightweight, and can also reduce the flow resistance of the working fluid and the risk of leakage. At the same time, the battery cell module is directly placed on the cold plate, which can omit the shell structure, which is not only beneficial to cost reduction and lightweight, but also helps to ensure that the energy storage system has a higher energy density.

[0019] Furthermore, the cold plate is plugged and connected to the end plates at both ends, which is conducive to improving the convenience of disassembly and maintenance. The first plug-in protrusion is inserted into the corresponding first slot, which is conducive to the assembly between the end plate and the cold plate, and forms a better support effect on the cold plate. The outlet of each three-way valve in the liquid inlet pipeline is connected to each liquid inlet channel one by one, and the outlet of each three-way valve in the liquid outlet pipeline is connected to each liquid outlet channel one by one. Therefore, the layout structure is reasonable, which is conducive to reducing the use of pipelines, reducing the flow path of the working fluid, and reducing energy loss.

[0020] Secondly, an exhaust valve is provided at the top of the liquid outlet pipeline, which can discharge excess gas in the pipeline and improve the smoothness of the working fluid flow. The setting of the quick-connect connector helps to reduce the difficulty of disassembly and assembly and improve the convenience of disassembly and assembly. At the same time, it is conducive to the individual control of the flow of working fluid in each cold plate, which is conducive to the maintenance and replacement of a single cold plate and battery cell bracket. The liquid inlet and outlet main pipes are respectively provided in the liquid inlet and outlet pipelines, which helps to reduce the flow distance and improve the heat exchange efficiency.

[0021] In addition, the connecting channel is Z-shaped, which is convenient for simultaneous connection with the inlet and outlet liquid pipelines and the cold plate, and the second sub-channel is connected to the flow channel of the cold plate after penetrating the first plug-in protrusion, which can realize the integration of the connecting channel and the first plug-in protrusion, which is convenient for saving the layout space in the vertical direction, thereby improving the overall integration of the structure. The cold plate can transfer all the gravity to the end plate through the side beam, thereby improving the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the energy storage system according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the end plate and the inlet and outlet liquid pipelines according to an embodiment of the utility model;

[0025] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the battery cell bracket according to an embodiment of the utility model;

[0027] Figure 5 for Figure 4 A bottom view of the structure shown in;

[0028] Figure 6 for Figure 4 A top view of the structure shown in;

[0029] Figure 7 for Figure 6 Cross-sectional view along the BB direction;

[0030] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0031] Fig. 9 This is a schematic diagram of the structure of the cold plate according to an embodiment of the utility model;

[0032] Fig.10 for Fig. 9 The enlarged view of point D in the middle;

[0033] Fig.11 This is a schematic structural diagram of the end plate according to an embodiment of the utility model;

[0034] Fig.12 It is a partial structural schematic diagram of the energy storage system according to an embodiment of the utility model;

[0035] Fig.13 for Fig.12 Enlarged view of point E in the middle;

[0036] Description of reference numerals:

[0037] 1. Liquid inlet and outlet pipelines; 11. Liquid inlet pipeline; 111. First quick-connect fitting; 112. Liquid inlet main pipe; 12. Liquid outlet pipeline; 121. Second quick-connect fitting; 122. Liquid outlet main pipe; 123. Exhaust valve; 13. Three-way valve; 14. Two-way valve; 15. Water inlet fitting; 16. Water outlet fitting;

[0038] 2. Cell bracket; 21. Cold plate; 211. First slot; 2111. Flow channel inlet; 2112. Flow channel outlet; 212. Connecting flange; 22. End plate; 221. First plug-in protrusion; 222. Second plug-in protrusion; 223. Second slot; 23. Installation area; 231. Cell module; 232. Baffle;

[0039] 3, connecting channel; 31, liquid inlet channel; 32, liquid outlet channel; 311, first sub-channel; 312, middle channel; 313, second sub-channel;

[0040] 4. Side beam; 41. Fasteners;

[0041] 5. Fixing block; 6. Thermal conductive structural adhesive; 7. Tray;

[0042] d1, the distance between the cold plate and the cold plate below it; d2, the gap between the cold plate and the battery cell module below it. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] Taking the energy storage system described in the present utility model as an example, the directional words used in the embodiments, such as "up, down, left, right, front, back" are based on Figure 1 The vertical direction (also called the height direction), the horizontal direction (also called the width direction), and the front-back direction (also called the length direction) in the illustrated state are defined as references.

[0046] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] This embodiment relates to an energy storage system, which is conducive to cost reduction and lightweight. In terms of overall structure, Figure 1 , Figure 4 and Fig.12As shown, the energy storage system of this embodiment includes a cabinet, and a liquid inlet and outlet pipeline 1 and a plurality of battery cell brackets 2 arranged in the cabinet, and the plurality of battery cell brackets 2 are arranged in sequence along the up and down direction, and the liquid inlet and outlet pipeline 1 is located on one side of each battery cell bracket 2.

[0050] Furthermore, each battery cell bracket 2 includes a cold plate 21 and end plates 22 arranged at both ends of the cold plate 21. An installation area 23 for installing a battery cell module 231 is formed between each cold plate 21 and the corresponding end plates 22 at both ends. At the same time, a connecting channel 3 connecting the liquid inlet and outlet pipelines 1 and the corresponding cold plate 21 is provided on the end plate 22 of each battery cell bracket 2 close to the liquid inlet and outlet pipelines 1.

[0051] Here, the energy storage system of this embodiment integrates the connecting channel 3 connecting the inlet and outlet liquid pipelines 1 and the cold plate 21 on the end plate 22, which can reduce the use of pipelines, help reduce costs and achieve lightweight. At the same time, the battery cell module 231 is placed directly on the cold plate 21, which can eliminate the shell structure, which is not only conducive to improving cost reduction and lightweight, but also helps to ensure that the energy storage system has a higher energy density.

[0052] Based on the above overall introduction, in this embodiment, as a preferred implementation form, Figures 1 to 4 As shown, each cold plate 21 is plugged and connected with the corresponding end plates 22 at both ends, and two adjacent end plates 22 are plugged and connected along the up and down direction. This is conducive to improving the convenience of disassembly and assembly and the convenience of maintenance.

[0053] Still, it should be noted that Fig.12 and Fig.13 As shown, the distance d1 between the cold plate 21 and the lower cold plate 21 can be set between 120 mm and 300 mm, and its specific value can be set and adjusted according to the actual height size of the battery cell. For example, d1 can be specifically set to 270 mm or 300 mm, etc., as long as it can match the height size of the battery cell.

[0054] Furthermore, in this embodiment, as a preferred implementation form, Figure 4 and Fig.11 As shown, in each battery cell bracket 2, each end plate 22 is provided with a first plug-in protrusion 221 arranged along the extension direction of the cold plate 21, and first slots 211 are respectively provided at both ends of the cold plate 21, and the first plug-in protrusion 221 on each end plate 22 is inserted into the corresponding first slot 211, so that the arrangement is convenient for assembly and forms a better supporting effect for the cold plate 21.

[0055] In a specific implementation, the first plug-in protrusions 221 on the end plates 22 at both ends are inserted into the first slots 211 corresponding to the cold plate 21 to form an installation area 23 for installing the battery cell module 231. At the same time, the end plates 22 are provided with second plug-in protrusions 222 and second slots 223. During installation, the second plug-in protrusions 222 of the upper end plates 22 are inserted into the second slots 223 of the lower end plates 22, so as to install layer by layer.

[0056] Here, the number of layers of the cold plate 21 can be designed and adjusted accordingly according to actual conditions. For example, it can be preferably set to seven layers to place six layers of battery cell modules in order to increase the volume energy density and reduce the total weight of the system.

[0057] In addition, in this embodiment, as a preferred implementation form, Figure 4 , Fig.10 and Fig.11 As shown, each communication channel 3 includes a liquid inlet channel 31 and a liquid outlet channel 32 formed on the corresponding end plate 22 , the liquid inlet channel 31 is connected to the flow channel inlet 2111 of the cold plate 21 , and the liquid outlet channel 32 is connected to the flow channel outlet 2112 of the cold plate 21 .

[0058] At the same time, if Figure 2 As shown, the inlet and outlet liquid pipelines 1 include an inlet pipeline 11 with multiple three-way valves 13 connected in series, and a liquid outlet pipeline 12 with multiple three-way valves 13 connected in series, and the outlets of each three-way valve 13 in the inlet pipeline 11 are connected one-to-one with each liquid inlet channel 31, and the outlets of each three-way valve 13 in the liquid outlet pipeline 12 are connected one-to-one with each liquid outlet channel 32.

[0059] With this arrangement, the structural layout is reasonable, which is conducive to reducing the use of pipelines, reducing the flow path of the working fluid, and reducing energy loss. It is worth mentioning that the working fluid can be a heat exchange liquid familiar to those skilled in the art, such as water, oil, etc.

[0060] In this embodiment, the number of three-way valves 13 can be designed and adjusted accordingly according to the actual demand. Here, the three-way valve on the liquid inlet pipeline can be set to five corresponding to the number of liquid inlet channels 31 of the middle cold plate 21, and the three-way valve on the liquid outlet pipeline can be set to seven corresponding to the number of liquid outlet channels 32 of all cold plates 21. It is worth noting that two-way valves 14 are set at the top liquid inlet channel 31, the bottom liquid inlet channel 31 and the bottom of the liquid outlet pipeline.

[0061] In addition, in this embodiment, as a preferred implementation form, Figure 2As shown, an exhaust valve 123 is provided at the top of the liquid outlet pipeline 12, and the outlet of each three-way valve 13 in the liquid inlet pipeline 11 is provided with a first quick-connect connector 111 for plugging with the corresponding liquid inlet channel 31, and the outlet of each three-way valve 13 in the liquid outlet pipeline 12 is provided with a second quick-connect connector 121 for plugging with the corresponding liquid outlet channel 32.

[0062] Here, the exhaust valve 123 is provided to discharge excess gas in the pipeline and improve the smoothness of the working fluid flow. In addition, the first quick-connect connector 111 and the second quick-connect connector 121 are provided to reduce the difficulty of disassembly and assembly, improve the convenience of disassembly and assembly, and at the same time, facilitate the individual control of the flow of the working fluid in each cold plate 21, thereby facilitating the maintenance and replacement of a single cold plate 21 and the battery cell bracket 2.

[0063] Furthermore, the middle of the liquid inlet pipeline 11 along the vertical direction is connected to the liquid inlet main pipe 112, and the middle of the liquid outlet pipeline 12 along the vertical direction is connected to the liquid outlet main pipe 122. This arrangement is conducive to reducing the flow distance and improving the heat exchange efficiency.

[0064] In terms of specific structure, Figure 2 As shown, the liquid inlet main pipe 112 is arranged between the third and fourth cold plates 21 along the liquid inlet pipeline 11 from top to bottom through the three-way valve 13, and the liquid outlet main pipe 122 is arranged between the fourth and fifth cold plates 21 along the liquid outlet pipeline 12 from top to bottom through the three-way valve 13. Compared with the traditional method of inletting and exiting the working fluid from the bottom, such an arrangement has a better flow equalization effect.

[0065] In this embodiment, as a preferred implementation form, Figure 6 and Figure 8 As shown, the connecting channels 3 are all Z-shaped, and have a first sub-channel 311 and a second sub-channel 313 arranged along the extension direction of the cold plate 21, and an intermediate channel 312 connecting the first sub-channel 311 and the second sub-channel 313. At the same time, the first sub-channel 311 is connected to the inlet and outlet liquid pipeline 1, and the second sub-channel 313 is connected to the flow channel in the cold plate 21 after passing through the first plug-in protrusion 221 along the extension direction of the cold plate 21.

[0066] Here, the connecting channel 3 is Z-shaped, which is convenient for simultaneous connection with the inlet and outlet liquid pipelines 1 and the cold plate 21, and the second sub-channel 313 is connected to the flow channel of the cold plate 21 after passing through the first plug-in protrusion 221, so that the connecting channel 3 and the first plug-in protrusion 221 can be integrated, which is convenient for saving the layout space in the up and down directions, thereby improving the overall integration of the structure.

[0067] It should also be noted that the Z-shape here is not a Z-shape in the strict sense, but is similar to the Z-shape in shape. When implemented specifically, the connecting channel 3 may also have a shape that matches the end plate structure, such as arranging the intermediate channel 312 along a direction perpendicular to the extension direction of the cold plate 21 (the end plate height direction).

[0068] In a specific implementation, the liquid inlet channel 31 and the liquid outlet channel 32 are both configured to be Z-shaped, the first quick-plug connector 111 is connected to the first sub-channel 311 of the liquid inlet channel 31, and the second quick-plug connector 121 is connected to the first sub-channel 311 of the liquid outlet channel 32. At the same time, the second sub-channel 313 of the liquid inlet channel 31 is connected to the flow channel inlet 2111 of the cold plate 21, and the second sub-channel 313 of the liquid outlet channel 32 is connected to the flow channel outlet 2112 of the cold plate 21.

[0069] It should be noted that the second sub-channel 313 of the liquid inlet channel 31 passes through the first plug-in protrusion 221 and is connected to the flow channel inlet 2111 of the cold plate 21, and the second sub-channel 313 of the liquid outlet channel 32 passes through the first plug-in protrusion 221 and is connected to the flow channel outlet 2112 of the cold plate 21. This facilitates the sealing of the connection between the connecting channel 3 and the flow channel to ensure the overall sealing.

[0070] In addition, in this embodiment, as a preferred implementation form, Figure 4 As shown, in each battery cell bracket 2, both sides of the cold plate 21 in the width direction are provided with connecting flanges 212, and side beams 4 corresponding to each connecting flange 212 are connected between the two end plates 22, and each side beam 4 is connected to the corresponding connecting flange 212 by a fastener 41. Here, the cold plate 21 can transfer all the gravity to the end plate 22 through the side beam 4, thereby improving the stability of the overall structure.

[0071] In addition, each cold plate 21, each end plate 22 and each side beam 4 are made of profiles, and the cross-street surface of the side beam 4 is rectangular. The profile has good strength and toughness, which is conducive to improving the stability of the overall structure.

[0072] And, if Fig.12 As shown, each battery cell module 231 is connected to the corresponding cold plate 21 via a thermally conductive structural adhesive 6. At the same time, a cold plate 21 is provided on the top of the uppermost battery cell bracket 2, and each battery cell module 231 is connected to the cold plate 21 above itself via a thermally conductive structural adhesive 6.

[0073] It is worth mentioning here that Fig.13As shown, a gap d2 is preferably provided between the cold plate 21 and the battery cell module 231 below it, and the value range of d2 is between 1 mm and 4 mm, so as to facilitate filling of thermal conductive structural adhesive between the cold plate 21 and the corresponding battery cell module 231 to avoid direct contact between the two, resulting in the battery cells in the lower battery cell module 231 being crushed. The specific value of d2 can be 1 mm, 2 mm or 4 mm, etc.

[0074] When the energy storage system of this embodiment is implemented, the first plug-in protrusions 221 of the end plates 22 at both ends are correspondingly plugged into the first slots 211 of the cold plate 21, and then the battery module 231 is directly placed on the cold plate 21. The six-layer battery tray 2 in this embodiment is placed in sequence along the up and down direction through the second plug-in protrusions 222 and the second slots 223 of the end plates 22, so that the weight of each layer of battery tray 2 can transfer gravity to the end plates 22 of the next layer through the end plates 22 at both ends, and then transfer layer by layer until it is transferred to the tray 7 at the bottom layer. At the same time, a fixed block 5 with a connecting channel 3 is inserted on the top of the uppermost end plate 22, and a second plug-in protrusion 222 is also provided on the fixed block 5, which can connect the inlet and outlet liquid pipelines 1 with the uppermost cold plate 21.

[0075] Furthermore, there is a 1 mm gap d1 between the cold plate 21 and the cell module 231 of the next layer, and the gap is filled with a thermal conductive structural adhesive 6 to prevent the cell bracket 2 of the upper layer from directly contacting the cell module 231 of the next layer, which would cause the cell to be crushed. The distance d2 between the cold plate 21 and the cold plate 21 of the lower layer can be set to 300 mm, making the overall structure more compact and improving the volume utilization.

[0076] Secondly, one end of the liquid inlet main pipe 112 is connected to the water inlet joint 15 through the two-way valve 14, and the other end is connected to the liquid inlet pipeline 11. One end of the liquid outlet main pipe 122 is connected to the water outlet joint 16 through the two-way valve 14, and the other end is connected to the liquid outlet pipeline 12. The working fluid flows in from the water inlet joint 15, and then flows into the liquid inlet pipeline 11 through the liquid inlet main pipe 112, passes through the two-way valve 14 at the top, the two-way valve 14 at the bottom and each three-way valve 13 on the liquid inlet pipeline 11, and then flows into each cold plate 21. After completing the heat exchange in the cold plate 21, it flows into the liquid outlet pipeline 12 through the three-way valve 13 on the liquid outlet pipeline 12, and finally converges into the liquid outlet main pipe 122, and then returns to the liquid cooling unit through the water outlet joint 16, thereby completing the heat exchange cycle.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage system, characterized in that: It comprises a cabinet, and a liquid inlet and outlet pipeline and a plurality of battery cell brackets arranged in the cabinet, wherein the plurality of battery cell brackets are arranged in sequence along the up-down direction, and the liquid inlet and outlet pipeline is located at one side of each battery cell bracket; Each of the battery cell brackets comprises a cold plate and end plates arranged at both ends of the cold plate, and each of the cold plates and the corresponding end plates at both ends form an installation area for installing the battery cell module; A communication channel connecting the liquid inlet and outlet pipelines and the corresponding cold plate is provided on the end plate of each battery bracket close to the liquid inlet and outlet pipelines.

2. The energy storage system according to claim 1, characterized in that: Each of the cold plates is plug-connected with the corresponding end plates at both ends; and / or, along the up-down direction, two adjacent end plates are plug-connected.

3. The energy storage system according to claim 2, characterized in that: In each of the battery cell brackets, each of the end plates is provided with a first insertion protrusion arranged along the extension direction of the cold plate, both ends of the cold plate are provided with a first slot, and the first insertion protrusion on each of the end plates is inserted into the corresponding first slot.

4. The energy storage system according to claim 3, characterized in that: Each of the communication channels comprises a liquid inlet channel and a liquid outlet channel formed on the corresponding end plate, the liquid inlet channel is connected to the flow channel inlet of the cold plate, and the liquid outlet channel is connected to the flow channel outlet of the cold plate; The inlet and outlet liquid pipelines include an inlet pipeline with multiple three-way valves connected in series, and a liquid outlet pipeline with multiple three-way valves connected in series, and the outlets of each of the three-way valves in the inlet pipeline are connected one-to-one with each of the liquid inlet channels, and the outlets of each of the three-way valves in the outlet pipeline are connected one-to-one with each of the liquid outlet channels.

5. The energy storage system according to claim 4, characterized in that: An exhaust valve is provided at the top of the liquid outlet pipeline; and / or, The outlet of each three-way valve in the liquid inlet pipeline is provided with a first quick-connect connector for plugging into the corresponding liquid inlet channel, and the outlet of each three-way valve in the liquid outlet pipeline is provided with a second quick-connect connector for plugging into the corresponding liquid outlet channel.

6. The energy storage system according to claim 4, characterized in that: The middle part of the liquid inlet pipeline along the up-down direction is connected to a liquid inlet main pipe; and / or the middle part of the liquid outlet pipeline along the up-down direction is connected to a liquid outlet main pipe.

7. The energy storage system according to claim 3, characterized in that: The connecting channels are all Z-shaped and have a first sub-channel and a second sub-channel arranged along the extension direction of the cold plate, and an intermediate channel connecting the first sub-channel and the second sub-channel; The first sub-channel is connected to the liquid inlet and outlet pipelines, and the second sub-channel passes through the first insertion protrusion along the extension direction of the cold plate and is connected to the flow channel in the cold plate.

8. The energy storage system according to claim 1, characterized in that: In each of the battery cell brackets, connecting flanges are provided on both sides of the cold plate in the width direction, and side beams corresponding to each of the connecting flanges are connected between the two end plates, and each of the side beams is connected to the corresponding connecting flange via a fastener.

9. The energy storage system according to claim 8, characterized in that: Each of the cold plates, each of the end plates and each of the side beams is made of profiles; and / or the cross-street surface of the side beam is rectangular.

10. The energy storage system according to any one of claims 1 to 9, characterized in that: Each of the battery core modules is connected to the corresponding cold plate via a thermally conductive structural adhesive; and / or, The cold plate is disposed on the top of the uppermost battery cell bracket, and each battery cell module is connected to the cold plate above itself via a heat-conducting structural adhesive.

Images