Energy storage device

Abstract

The utility model provides an energy storage device. The energy storage device comprises at least one battery bin and an electrical bin, the battery compartment comprises a battery box body and a plurality of battery units, the battery box body is provided with a battery mounting cavity, and the plurality of battery units are arranged in the battery mounting cavity; the electrical bin is arranged on one side of the battery bin and comprises an electrical box body and a plurality of electrical modules, the electrical box body is provided with an electrical installation cavity, and the plurality of electrical modules are installed in the electrical installation cavity and electrically connected to the plurality of battery units; wherein the battery compartment and the electrical compartment are separately arranged, and the battery mounting cavity is filled with a cooling medium to immerse the plurality of battery units. The utility model aims to provide the energy storage device which is high in cooling efficiency, split in arrangement and high in safety coefficient.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to an energy storage device. Background Art

[0002] Outdoor cabinets are often applied to outdoor occasions. Affected by natural weather, for example, high temperature and other environments cause the temperature of the outdoor cabinet to be too high. At the same time, the operation of electrical components such as batteries in the outdoor cabinet will also generate heat. When in a high-temperature environment for a long time, the outdoor cabinet is prone to thermal runaway. In related technologies, cooling is carried out through air cooling or cooling devices, but the cooling efficiency is low. Moreover, the battery compartment and the electrical compartment of the outdoor cabinet are mostly of an integrated structure. When thermal runaway occurs, both of them will have thermal runaway together, which is likely to expand the scope of thermal runaway and pose a greater safety hazard. Content of the Utility Model

[0003] An embodiment of the utility model provides an energy storage device, aiming to provide an energy storage device with high cooling efficiency, separate setting, and high safety factor.

[0004] In a first aspect, an embodiment of the utility model provides an energy storage device, including:

[0005] At least one battery compartment, the battery compartment includes a battery box body and one or more battery units, the battery box body is provided with a battery installation cavity, and one or more of the battery units are arranged in the battery installation cavity; and,

[0006] An electrical compartment, arranged on one side of the battery compartment, includes an electrical box body and a plurality of electrical modules, the electrical box body is provided with an electrical installation cavity, and the plurality of electrical modules are installed in the electrical installation cavity and are electrically connected to the plurality of battery units;

[0007] Wherein, the battery compartment and the electrical compartment are separately arranged, and the battery installation cavity is filled with a cooling medium to immerse the plurality of battery units.

[0008] In one embodiment, a perforation is provided on one side of the battery box body close to the electrical box body, and the perforation is used for at least one connecting wire to pass through to be electrically connected to the plurality of battery units and at least one of the electrical modules.

[0009] In one embodiment, the top surface of the cooling medium is lower than or flush with the horizontal plane where the bottom of the perforation is located.

[0010] In one embodiment, the distance between the top surface of the cooling medium and the horizontal plane where the bottom of the perforation is located is L1, where L1≥30mm.

[0011] In one embodiment, each of the battery cells includes a plurality of battery modules, and the plurality of battery modules are stacked along the height of the battery compartment. The top surface of the battery module located at the top of the plurality of battery cells is a first surface, and the top surface of the cooling medium is flush with or higher than the first surface.

[0012] In one embodiment, the distance between the top surface of the cooling medium and the first surface is L2, where L2 ≥ 20 mm.

[0013] In one embodiment, the plurality of electrical modules include a BMS module, a high-voltage box module, and a cooling module. The high-voltage box module is located above the cooling module, and the BMS module is located above the high-voltage box module. The high-voltage box module includes a box body and a communication interface installed on the box body. At least one connecting wire is electrically connected to the communication interface through the BMS module.

[0014] In one embodiment, a cooling connection assembly is further included. The cooling connection assembly includes an inlet joint and an outlet joint, and the inlet joint and the outlet joint are installed on the box body of the high-voltage box;

[0015] The battery box is formed with a battery box inlet part and a battery box outlet part. One end of the inlet joint is connected to the battery box inlet part, and the other end is connected to the cooling module. One end of the outlet joint is connected to the battery box outlet part, and the other end is connected to the cooling module.

[0016] In one embodiment, a pressure relief port is provided at the top end of the battery compartment, and the pressure relief port is covered with a cover plate; and / or,

[0017] A clamping groove is provided at the bottom of the battery compartment, and the clamping groove is used for a mobile device to be clamped to transport the battery compartment.

[0018] In one embodiment, the cooling medium is an insulating medium, and the insulating medium includes synthetic oil.

[0019] Advantageous effects of the embodiments of the present utility model:

[0020] In the technical solution of the present utility model, the battery box body includes battery box side plates surrounding the side of the battery installation cavity, the electrical box body includes electrical box side plates surrounding the side of the electrical installation cavity, the battery box side plates and the electrical box side plates are opposite and spaced apart, the battery compartment and the electrical compartment are separately arranged, the positions of the electrical compartment and the battery compartment can be adjusted according to the actual application environment, the versatility of the energy storage device is improved. At the same time, the battery compartment and the electrical compartment are separately arranged, when thermal runaway occurs in any one of them, it will not interfere with the other party, the degree of thermal runaway can be reduced, and the safety of the energy storage device is improved; further, the battery box is filled with a cooling medium, and the cooling medium submerges a plurality of the battery cells, so that the battery cells are in direct contact with the cooling medium, and the cooling efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a three-dimensional schematic diagram of the energy storage device provided by the embodiment of the present utility model;

[0023] Figure 2 is Figure 1 a schematic diagram of the structure of the battery compartment in (excluding the cooling medium);

[0024] Figure 3 is Figure 1 a schematic diagram of the structure of the battery compartment in (including the cooling medium);

[0025] Figure 4 is Figure 3 an enlarged schematic diagram of A in ;

[0026] Figure 5 is Figure 1 a schematic diagram of the structure of the battery module in ;

[0027] Figure 6 is Figure 1 a schematic diagram of the structure of the electrical compartment in .

[0028] EXPLANATION OF THE REFERENCE NUMERALS IN THE DRAWINGS

[0029]

[0030] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] Outdoor cabinets are often applied to outdoor occasions and are affected by natural weather. For example, high-temperature environments such as high temperature cause the temperature of the outdoor cabinet to be too high. At the same time, the operation of electrical components such as batteries in the outdoor cabinet will also generate heat. When the outdoor cabinet is in a high-temperature environment for a long time, it is prone to thermal runaway. In related technologies, cooling is carried out through air cooling or cooling devices, with low cooling efficiency. Moreover, the battery compartment and the electrical compartment of the outdoor cabinet are mostly of an integrated structure. When thermal runaway occurs, both will experience thermal runaway together, easily expanding the scope of thermal runaway and posing a greater safety hazard.

[0033] In view of this, the present utility model proposes an energy storage device. Figures 1 to 6 It is a schematic structural diagram of an embodiment of the energy storage device provided by the present utility model. The energy storage device provided by the present utility model has high cooling efficiency and high safety factor. The following will describe the energy storage device in detail with reference to the main drawings.

[0034] Please refer to Figure 1 , the present utility model provides an energy storage device 100, the energy storage device 100 includes at least one battery compartment 101 and an electrical compartment 105. The battery compartment 101 includes a battery box body 102 and a plurality of battery units 103. The battery box body 102 is provided with a battery installation cavity 104, and the plurality of battery units 103 are arranged in the battery installation cavity 104. The electrical compartment 105 is arranged on one side of the battery compartment 101 and includes an electrical box body and a plurality of electrical modules 106. The electrical box body is provided with an electrical installation cavity, and the plurality of electrical modules 106 are installed in the electrical installation cavity and are electrically connected to the plurality of battery units 103. Among them, the battery compartment 101 and the electrical compartment 105 are separately arranged, and a cooling medium 109 is filled in the battery installation cavity 104 to immerse the plurality of battery units 103.

[0035] In the technical solution of the present utility model, the battery box body 102 includes battery box side plates 107 surrounding the side of the battery installation cavity 104, the electrical box body includes electrical box side plates 108 surrounding the side of the electrical installation cavity, the battery box side plates 107 and the electrical box side plates 108 are opposite and spaced apart, the battery compartment 101 and the electrical compartment 105 are separately arranged, and the positions of the electrical compartment 105 and the battery compartment 101 can be adjusted according to the actual application environment, improving the versatility of the energy storage device 100. At the same time, the battery compartment 101 and the electrical compartment 105 are separately arranged, and when thermal runaway occurs in any one of them, it will not interfere with the other, which can reduce the degree of thermal runaway and improve the safety of the energy storage device 100; further, a cooling medium 109 is filled in the battery box, and the cooling medium 109 submerges a plurality of the battery cells 103, so that the battery cells 103 are in direct contact with the cooling medium 109, improving the cooling efficiency.

[0036] Specifically, please continue to refer to Figure 1 , the battery box body 102 includes battery box side plates 107 surrounding the side of the battery installation cavity 104, the electrical box body includes electrical box side plates 108 surrounding the side of the electrical installation cavity, the battery box side plates 107 and the electrical box side plates 108 are opposite and spaced apart, so that the battery compartment 101 and the electrical compartment 105 are separately arranged, and the battery compartment 101 can be arranged in the front side, rear side, left side and right side of the electrical compartment 105. Specifically, the battery compartment 101 and the electrical compartment 105 can be reasonably planned according to the actual on-site situation.

[0037] In some embodiments, the function of the electrical compartment 105 is to control the operation of the battery compartment 101 and monitor the states of a plurality of the battery cells 103 in the battery compartment 101. Since the battery compartment 101 and the electrical compartment 105 are electrically connected, and at the same time, a cooling medium 109 is filled in the battery installation cavity 104, during the electrical connection process, not only the convenience of connection needs to be considered, but also the setting position of the through holes 110 needs to be considered to avoid leakage of the cooling medium 109 in the battery installation cavity 104. Specifically, please refer to Figure 2 and Figure 3 , the battery box side plates 107 are provided with a plurality of through holes 110, the plurality of through holes 110 are spaced apart, and the through holes 110 are used for at least one connecting wire to pass through to be electrically connected to a plurality of the battery cells 103 and at least one of the electrical modules 106. Further, taking the high-voltage wire as an example, one end of the high-voltage wire passes through one of the through holes 110, enters the battery installation cavity 104, and is connected to the battery cell 103 in the battery installation cavity 104, and the other end of the high-voltage wire enters the electrical box body and is connected to one of the electrical modules 106.

[0038] It should be noted that the top surface of the cooling medium 109 is lower than or flush with the horizontal plane where the bottom of the perforation 110 is located. As a preferred embodiment, the top surface of the cooling medium 109 is lower than the horizontal plane where the bottom of the perforation 110 is located, which can prevent the cooling medium 109 from leaking out from the perforation 110. It should be noted that the application environment of the energy storage device 100 is generally outdoors. When a vehicle or the like passes by the energy storage device 100, the battery compartment 101 will shake due to phenomena such as resonance. If the top surface of the cooling medium 109 is flush with the horizontal plane where the bottom of the perforation 110 is located, during the shaking of the battery compartment 101, the cooling medium 109 will leak out from the perforation 110, thus affecting the cooling effect.

[0039] Furthermore, in some embodiments, please refer to Figure 4 , the distance between the top surface of the cooling medium 109 and the horizontal plane where the bottom of the perforation 110 is located is L1, where L1 ≥ 30 mm. When the distance between the top surface of the cooling medium 109 and the horizontal plane where the bottom of the perforation 110 is located is less than 30 mm, when the battery compartment 101 vibrates due to phenomena such as resonance, the cooling medium 109 will leak out from the perforation 110; it should be noted that in order to avoid leakage, the larger the value of L1, the better, but when the value of L1 increases, the volume of the battery compartment 101 will also increase correspondingly. Therefore, the value of L1 is adaptively adjusted according to the actual application occasion and environment; as a preferred embodiment, the distance between the top surface of the cooling medium 109 and the horizontal plane where the bottom of the perforation 110 is located is 30 mm. At this value of L1, it will neither occupy too much space nor cause the cooling medium 109 to leak due to being too close to the top surface of the cooling medium 109.

[0040] In some embodiments, each battery unit 103 includes a plurality of battery modules 111, and the plurality of battery modules 111 are stacked along the height of the battery compartment 101. The top surface of the battery module 111 located at the top of the plurality of battery units 103 is the first surface, and the top surface of the cooling medium 109 is flush with or higher than the first surface. As a preferred embodiment, the top surface of the cooling medium 109 is higher than the first surface. Such a setting can ensure that the battery module 111 at the top can also be immersed in the cooling medium 109, thereby ensuring the cooling efficiency. It should be noted that when the top surface of the cooling medium 109 is flush with the first surface, if the battery compartment 101 shakes due to phenomena such as resonance, the cooling medium 109 will also shake, resulting in the area of the battery module 111 at the top being exposed outside the cooling medium 109, and the cooling efficiency is reduced.

[0041] In some embodiments, referring to Figure 4 , the distance between the top surface of the cooling medium 109 and the first surface is L2, where L2 ≥ 20 mm. When the distance between the top surface of the cooling medium 109 and the first surface is less than 20 mm, when the battery compartment 101 vibrates due to phenomena such as resonance, the cooling medium 109 will vibrate along with the battery compartment 101, resulting in some areas of the battery module 111 at the top being exposed outside the cooling medium 109, affecting the cooling efficiency. The larger the value of L2, the better, as it can wrap any part of the multiple battery cells 103 in the cooling medium 109. However, it should be noted that when the value of L2 increases, the volume of the battery installation cavity 104 also needs to increase correspondingly, which will cause the volume of the battery compartment 101 to increase correspondingly. Therefore, the value of L2 is adaptively adjusted according to the actual application scenario and environment. When the environment where the battery compartment 101 is located is relatively quiet and there are no extra objects that can cause the battery compartment 101 to resonate, the value of L2 can be reduced correspondingly. When the environment where the battery compartment 101 is located is relatively complex, the value of L2 can be increased correspondingly to avoid some areas of the battery module 111 at the top being exposed outside the cooling medium 109. As a preferred embodiment, the distance between the top surface of the cooling medium 109 and the first surface is 20 mm. At this value of L1, it can not only meet the requirements of cooling efficiency but also not occupy too much space.

[0042] Referring to Figure 1 and Figure 2 , in some embodiments, the energy storage device 100 further includes a plurality of support components. The plurality of support components are disposed in the battery installation cavity 104, and the support components are used to support the plurality of battery modules 111. Specifically, each support component includes a support frame and a plurality of support plates. A plurality of installation positions are formed on the support frame, and the plurality of support plates are correspondingly installed in the plurality of installation positions. An installation cavity is formed between adjacent two support plates, and one battery module 111 is correspondingly disposed in each installation cavity.

[0043] In this embodiment, there are four groups of the battery cells 103, and the four groups of battery cells 103 are arranged at intervals along the length direction of the battery compartment 101. Each group of battery cells 103 includes 8 battery modules 111.

[0044] In some embodiments, referring to Figure 5, each of the battery modules 111 includes a plurality of single cells 119 and a fixing member 120. The plurality of single cells 119 are arranged side by side, and the fixing member 120 surrounds the outside of the plurality of single cells 119 to fix the plurality of single cells 119. Each battery module 111 further includes a signal acquisition board 121, which is disposed at the upper ends of the plurality of single cells 119 and is used to connect to the electrodes of the plurality of single cells 119. The signal acquisition board 121 is connected to the connection line, so as to transmit the information of the battery module 111 to the electrical compartment 105.

[0045] In some embodiments, the fixing member 120 is an insulating steel strip. Selecting an insulating steel strip can not only ensure the connection strength but also prevent short circuits.

[0046] Please refer to Figure 1 and Figure 6 , in some embodiments, the plurality of electrical modules 106 include a BMS module, a high-voltage box module 113, and a cooling module 114. The high-voltage box module 113 is located above the cooling module 114, and the BMS module is located above the high-voltage box module 113. Arranging the high-voltage box module 113 and the BMS module above the cooling module 114 can improve the safety of the electrical compartment 105. When the cooling medium 109 in the cooling module 114 leaks, the cooling medium 109 will not interfere with the BMS module or the high-voltage box module 113, improving the safety of the energy storage device 100. Further, the high-voltage box module 113 includes a box body and a communication interface installed on the box body. At least one connection line is electrically connected to the communication interface through the BMS module.

[0047] Please refer to Figure 6, the energy storage device 100 further includes a cooling connection assembly. The cooling connection assembly includes an inlet joint 115 and an outlet joint 116. The inlet joint 115 and the outlet joint 116 are installed on the box body of the high-voltage box. It should be noted that by arranging the inlet joint 115 and the outlet joint 116 on the box body of the high-voltage box module 113, the box body of the high-voltage box module 113 provides a fixed position for the cooling connection assembly, preventing the cooling connection assembly from shaking, thereby avoiding leakage of the cooling medium 109 and improving the safety of the energy storage device 100. Further, the battery box is formed with a battery box inlet part and a battery box outlet part. One end of the inlet joint 115 is connected to the battery box inlet part, and the other end is connected to the cooling module 114. One end of the outlet joint 116 is connected to the battery box outlet part, and the other end is connected to the cooling module 114. The battery box inlet part communicates with the inlet joint 115, and the battery box outlet part communicates with the cooling. Specifically, the cooling medium 109 in the battery box flows out from the battery box outlet part, passes through the outlet joint 116, flows into the cooling module 114, is cooled in the cooling module 114, then flows out from the cooling module 114, passes through the inlet joint, and flows into the battery box from the battery box inlet part to complete the cooling cycle.

[0048] It should be noted that during thermal runaway, a lot of gas will be generated inside the battery compartment 101. When the concentration of the gas reaches a certain level, if it cannot be discharged in time, the battery compartment 101 will explode. To avoid the above situation, a pressure relief port 117 is provided at the top of the battery compartment 101, and the pressure relief port 117 is covered with a cover plate. When thermal runaway occurs, the cover plate is opened, and the gas generated in the battery compartment 101 flows out from the pressure relief port 117, thereby avoiding situations such as explosion and improving the safety of the energy storage device 100.

[0049] In some embodiments, a clamping groove 118 is provided at the bottom of the battery compartment 101. The clamping groove 118 is used for a mobile device to be clamped to transport the battery compartment 101. The purpose of setting the clamping groove 118 is to facilitate the transportation and splicing of multiple battery compartments 101, and the position of the battery compartment 101 can be adjusted according to the actual situation, so as to achieve reasonable use of space.

[0050] It should be noted that the immersion cooling method is adopted in this embodiment, and the cooling medium 109 immerses multiple battery cells 103. Therefore, for safety improvement, the cooling medium 109 is an insulating medium. Further, the insulating medium is synthetic oil.

[0051] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An energy storage device, characterized in that: include: At least one battery compartment, the battery compartment comprising a battery box and one or more battery cells, the battery box having a battery installation cavity, the one or more battery cells being arranged in the battery installation cavity; and, An electrical compartment, arranged at one side of the battery compartment, comprising an electrical box and a plurality of electrical modules, wherein the electrical box is provided with an electrical installation cavity, wherein the plurality of electrical modules are installed in the electrical installation cavity and are electrically connected to the plurality of battery cells; Wherein, the battery compartment and the electrical compartment are separately arranged, and the battery installation cavity is filled with a cooling medium to immerse the multiple battery units.

2. The energy storage device according to claim 1, characterized in that: A through hole is provided on one side of the battery box body close to the electrical box body, and the through hole is used for at least one connecting wire to pass through so as to be electrically connected to the plurality of battery units and at least one electrical module.

3. The energy storage device according to claim 2, characterized in that: The top surface of the cooling medium is lower than or flush with the horizontal plane where the bottom of the through hole is located.

4. The energy storage device according to claim 3, characterized in that: The distance between the top surface of the cooling medium and the horizontal plane where the bottom of the perforation is located is L1, wherein L1≥30 mm.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: Each of the battery cells includes multiple battery modules, and the multiple battery modules are stacked along the height of the battery compartment. The top surface of the battery module located at the top of the multiple battery cells is the first surface, and the top surface of the cooling medium is flush with or higher than the first surface.

6. The energy storage device according to claim 5, characterized in that: The distance between the top surface of the cooling medium and the first surface is L2, wherein L2≥20 mm.

7. The energy storage device according to any one of claims 1 to 4, characterized in that: The multiple electrical modules include a BMS module, a high-voltage box module and a cooling module. The high-voltage box module is located above the cooling module, and the BMS module is located above the high-voltage box module. The high-voltage box module includes a box body and a communication interface installed on the box body, and at least one connecting line is electrically connected to the communication interface through the BMS module.

8. The energy storage device according to claim 7, characterized in that: It also includes a cooling connection assembly, the cooling connection assembly includes an inlet joint and an outlet joint, the inlet joint and the outlet joint are installed on the box body of the high-pressure box; The battery box is formed with a battery box inlet and a battery box outlet, one end of the inlet connector is connected to the battery box inlet, and the other end is connected to the cooling module, and one end of the outlet connector is connected to the battery box outlet, and the other end is connected to the cooling module.

9. The energy storage device according to any one of claims 1 to 4, characterized in that: The top of the battery compartment is provided with an explosion vent, and the explosion vent cover is provided with a cover plate; and / or, A snap-in slot is provided at the bottom of the battery compartment, and the snap-in slot is used for snapping in a mobile device to transport the battery compartment.

10. The energy storage device according to any one of claims 1 to 4, characterized in that: The cooling medium is an insulating medium, and the insulating medium includes synthetic oil.

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