Air-cooled battery pack and energy storage system

Abstract

The utility model provides an air-cooled battery pack and an energy storage system. The air-cooled battery pack is installed on a battery rack in the energy storage system. The air-cooled battery pack has multiple single cells, including: a panel located at the front end of the multiple single cells; a base located at the bottom of the multiple single cells and supporting the multiple single cells; an insulating cover plate located at the top of the multiple single cells and covering the multiple single cells; a baffle plate close to the panel and parallel to the panel, the baffle plate is connected to the insulating cover plate or the panel, and the baffle plate blocks the gap between the upper and lower air-cooled battery packs. The air-cooled battery pack and energy storage system provided by the utility model can reduce the leakage area of ​​cooling gas in the air duct of the energy storage system and improve the heat dissipation and cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an air-cooled battery pack and an energy storage system. Background Art

[0002] Energy storage systems are generally in the form of containers or cabinets. Multiple battery packs for storing electrical energy are installed inside the container or cabinet, and multiple battery packs are installed in an array on a battery rack. The battery pack contains multiple single cells, which will emit heat during operation. When the heat accumulates to a certain level, thermal runaway will occur.

[0003] In order to avoid the occurrence of thermal runaway, refrigeration equipment (such as industrial air conditioners) are generally installed on containers or cabinets. The refrigeration equipment delivers cooling gas to the inside of the container or cabinet to dissipate heat and cool the battery pack. In order to achieve a better cooling effect, a heat dissipation duct is usually set inside the battery pack, so that the cooling gas delivered by the refrigeration equipment exchanges cooling with the battery pack and then discharges the battery pack from the heat dissipation duct, and then the return air of the refrigeration equipment discharges the heat from the box or cabinet. For example, the solution described in the patent "Heat dissipation device for battery module and energy storage battery pack" (publication number: CN219998325U) is to set an exhaust duct inside the battery pack and an exhaust fan connected to the exhaust duct outside the battery pack to discharge the heat in the battery pack through the exhaust duct.

[0004] Since the fit between the battery pack and the battery rack is a clearance fit, the gap at the fit causes leakage of the cooling gas during actual operation. Part of the cooling gas does not enter the exhaust duct of the battery pack but is directly discharged from the gap, resulting in reduced air duct efficiency of the entire machine and worse heat dissipation effect. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an air-cooled battery pack and an energy storage system to reduce the leakage area of ​​cooling gas and improve the heat dissipation and cooling effect.

[0006] To achieve the above-mentioned purpose, the utility model provides an air-cooled battery pack, which is installed in a battery rack in an energy storage system. The air-cooled battery pack has multiple single cells, including: a panel, located at the front end of the multiple single cells; a base, located at the bottom of the multiple single cells and supporting the multiple single cells; an insulating cover plate, located at the top of the multiple single cells and covering the multiple single cells; a baffle, close to the panel and parallel to the panel, the baffle is connected to the insulating cover plate or the panel, and the baffle blocks the gap between the upper and lower air-cooled battery packs.

[0007] Preferably, one side of the baffle is connected to the insulating cover plate, and the other side extends upward, so that the baffle of the lower air-cooled battery pack abuts against the base of the upper air-cooled battery pack.

[0008] Preferably, the length of the baffle is less than or equal to the width of the insulating cover plate.

[0009] Preferably, the baffle includes a first side, a second side and a third side, the first side is close to the panel and parallel to the panel, the second side is connected to the first side and perpendicular to the first side, and the third side is connected to the insulating cover plate and the second side and parallel to the first side.

[0010] Preferably, the base includes a groove, the groove corresponds to the position of the baffle, the notch of the groove is downward, the groove runs through both sides of the base in the width direction, and the width direction of the base is the same as the width direction of the insulating cover.

[0011] Preferably, the groove includes a first groove wall, the first groove wall is close to the panel, and the air-cooled battery pack is installed after the battery rack, and the first groove wall abuts against the first side surface of the baffle of the lower air-cooled battery pack.

[0012] Preferably, the insulating cover plate is made of a PC plate, and the baffle plate and the insulating cover plate are integrally bent and formed.

[0013] The utility model also provides an energy storage system, comprising a plurality of air-cooled battery packs as described in any one of the above items, wherein the plurality of air-cooled battery packs are placed layer by layer on a battery rack.

[0014] Compared with the prior art, the air-cooled battery pack provided by the utility model is provided with a baffle near the panel, the baffle is parallel to the panel, and the gap between the air-cooled battery pack and the battery rack is blocked by the baffle; the baffle is connected to the insulating cover plate, and extends upward to abut against the base of the upper air-cooled battery pack, so that the air duct of the energy storage system forms a sealed structure; a groove is provided at the front end of the base, so that the baffle of the lower air-cooled battery pack can extend into the groove, further improving the sealing effect. The air-cooled battery pack provided by the utility model can reduce the leakage area of ​​the cooling gas in the air duct of the energy storage system and improve the heat dissipation and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an energy storage cabinet in the prior art;

[0016] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0017] Figure 3 A schematic diagram of an air-cooled battery pack provided by an embodiment of the utility model;

[0018] Figure 4 A side view of an air-cooled battery pack provided by an embodiment of the utility model;

[0019] Figure 5 A schematic diagram of two air-cooled battery packs on the upper and lower sides of a battery rack provided by an embodiment of the utility model;

[0020] Figure 6 A schematic diagram of the interior of an air-cooled battery pack provided by an embodiment of the utility model;

[0021] Figure 7 A schematic diagram of an energy storage cabinet provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any substitution, modification, equivalent method and scheme made within the spirit and scope of the present invention.

[0023] In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without these detailed descriptions.

[0024] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the accompanying drawings are all simplified and use non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] Where there are descriptions involving “first”, “second”, etc. in the present invention, the descriptions of “first”, “second”, etc. are only used for descriptive purposes and are not intended to specifically refer to an order or sequence, nor are they intended to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0026] Please refer to Figure 1 and Figure 2 , is a schematic diagram of an energy storage cabinet in the prior art. Figure 1 and Figure 2As shown, the cabinet-type energy storage system (hereinafter referred to as: energy storage cabinet) includes a cabinet 10, and the cabinet door of the cabinet 10 is provided with an air outlet 11 and a return air outlet 12 of the refrigeration equipment. A battery rack 16 and an air inlet 13 are arranged in the cabinet body of the cabinet 10. The air inlet 13 is connected to the air outlet 11 and has a corresponding position. A plurality of battery packs 14 are placed on the battery rack 16 in layers, and there is a gap 15 between the upper and lower battery packs 14 when they are installed in cooperation with the battery rack. The cooling gas of the refrigeration equipment (not shown in the figure) enters the air inlet 13 from the air outlet 11, and then enters the cabinet body of the cabinet 10. Part of the cooling gas exchanges heat with the battery pack 14, and the heat is discharged from the battery pack 14 under the drive of the exhaust fan. Another part of the cooling gas leaks out from the gap 15, and the refrigeration equipment then draws air through the return air outlet 12 to discharge the heat outside the cabinet 10. The cooling gas leaked out from the gap 15 does not enter the battery pack 14 to exchange heat with the heat, so that the air cooling efficiency is reduced and the heat dissipation and cooling effect is poor.

[0027] To this end, the utility model provides an air-cooled battery pack 20, please refer to Figure 3 and Figure 4 The air-cooled battery pack 20 includes a plurality of single cells 21, which are arranged in two rows. A base 23 is provided at the bottom of the single cell 21 for supporting the single cell 21. The top of the single cell 21 is covered with an insulating cover plate 22. A heat sink 24 is provided between two adjacent single cells 21. The heat sink 24 absorbs the heat generated by the single cell 21. The heat sink 24 is connected to the air duct 26 between the two rows of single cells 21. The air duct 26 is connected to the exhaust fan 251 on the panel 25. The cooling gas can enter the cavity of the heat sink 24 for heat exchange, and then enter the air duct 26 from the cavity of the heat sink 24, and then be discharged out of the battery pack 20 through the exhaust fan 251. The air-cooled battery pack 20 also includes a baffle 27, which is located at the front end of the air-cooled battery pack 20, close to the panel 25. The baffle 27 is parallel to the panel 25. The baffle 27 abuts against the air-cooled battery pack on the upper layer or the air-cooled battery pack on the lower layer, and can be connected to the panel 25 or the insulating cover 22 to block the gap between the upper and lower air-cooled battery packs, reduce the gap area, and reduce the leakage of cooling gas.

[0028] In this embodiment, one side of the baffle 27 is connected to the front edge of the insulating cover plate 22, and the other side of the baffle 27 extends upward, and the extension height can be against the base 23 of the upper air-cooled battery pack 201. The length of the baffle 27 is less than or equal to the width of the insulating cover plate 23, and preferably the same width as the insulating cover plate 23, so as to cover as much gap as possible with the battery rack. The baffle 27 includes a first side 271, a second side 272 and a third side 273. The first side 271 is close to the panel 25 and parallel to the panel 25. The second side 272 is connected to the bottom of the first side 271 and is perpendicular to the first side 271. The third side 273 is respectively connected to the second side 272 and the front edge of the insulating cover plate 22, and is parallel to the first side 271. The insulating cover plate 22 is made of a PC board. The baffle 27 can be bent and formed integrally with the insulating cover plate 22, so that it can meet the insulation performance and can also be slightly deformed without affecting the overall structure, and the manufacturing cost is low.

[0029] In other embodiments, one side of the baffle 27 can be connected to the top of the panel 25 and extend upward, and the other side of the baffle 27 is against the bottom of the upper air-cooled battery pack, thereby blocking the gap between the upper air-cooled battery pack.

[0030] In other embodiments, one side of the baffle 27 is connected to the front edge of the base 23 and extends downward, and the other side of the baffle 27 is against the top of the lower air-cooled battery pack, thereby blocking the gap between the baffle 27 and the lower air-cooled battery pack.

[0031] In other embodiments, one side of the baffle 27 is connected to the bottom of the panel 25 and extends downward, and the other side of the baffle 27 is against the top of the lower air-cooled battery pack, thereby blocking the gap between the baffle 27 and the lower air-cooled battery pack.

[0032] In this embodiment, Figure 3 and Figure 4 As shown, the front end of the base 23 is also provided with a groove 28, the opening of the groove 28 is downward, and the groove 28 runs through both sides of the base 23 in the width direction. The width direction of the base 23 is the same as the width direction of the insulating cover plate 22. The groove 28 includes a first groove wall 281 close to the panel 25. Figure 5As shown, the upper air-cooled battery pack 201 is located on the mounting bracket 161 of the battery rack, and the position of its groove 28 corresponds to the position of the baffle 27 of the lower air-cooled battery pack 202, so that the baffle 27 of the lower battery pack 202 can extend upward to a height exceeding the bottom of the upper air-cooled battery pack 201 and be accommodated in the groove 28 of the upper air-cooled battery pack 201 to enhance the sealing effect. After the upper and lower air-cooled battery packs 20 are installed in place, the first groove wall 281 of the groove 28 of the upper air-cooled battery pack 201 will abut against the first side surface 271 of the baffle 27 of the lower air-cooled battery pack 202, so that the air duct forms a sealing structure, and the first groove wall 281 of the groove 28 can also slightly squeeze the first side surface of the baffle 27 to further improve the sealing.

[0033] like Figure 6 As shown, the air duct 26 is arranged between two rows of single cells 21. The air duct 26 includes a trumpet-shaped exhaust duct 261 and an air duct pressure plate 262. The air duct pressure plate 262 is arranged around the top and rear side of the single cell 21 to form a sealed air duct between the two rows of single cells 21. Combined with the baffle 27, after the air-cooled battery pack 20 is installed on the battery rack, a sealed cavity is formed inside the air-cooled battery pack 20. The cooling gas inside the cabinet can only enter the air duct 26 from the heat sink 24 under the drive of the exhaust fan 251, and then be discharged from the air-cooled battery pack 20. In this embodiment, the exhaust duct 261 and the air duct pressure plate 262 are made of sheet metal.

[0034] like Figure 7 As shown, a schematic diagram of an energy storage cabinet provided by an embodiment of the utility model. When the air-cooled battery pack 20 is installed on the battery rack in the cabinet, it is installed in sequence from bottom to top. After the upper air-cooled battery pack 201 is pushed to the end, the groove 28 can press the baffle 27 of the lower air-cooled battery pack 202. The gap between the battery pack and the battery rack is sealed by the baffle 27 to reduce the gas leakage area. The air duct of the entire energy storage system forms a sealed structure. The cooling gas enters the rear side of the battery rack from the air inlet pipe. Driven by the exhaust fan, more cooling gas exchanges with the heat of the battery pack to improve the heat dissipation and cooling effect and the energy utilization efficiency of the energy storage system.

[0035] Although the embodiments are described and illustrated separately above, some common technologies are involved. It is the opinion of ordinary technicians in this field that the embodiments can be replaced and integrated. If the content is not clearly recorded in one of the embodiments, reference can be made to another recorded embodiment.

[0036] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. An air-cooled battery pack installed in a battery rack in an energy storage system, wherein the air-cooled battery pack (20) has a plurality of single cells (21), characterized in that: include: A panel (25) located at the front end of the plurality of single battery cells (21); A base (23) located at the bottom of the plurality of single battery cells (21) and supporting the plurality of single battery cells (21); An insulating cover plate (22), located on top of the plurality of single battery cells (21) and covering the plurality of single battery cells (21); A baffle (27) is close to the panel (25) and parallel to the panel (25), the baffle (27) is connected to the insulating cover (22) or the panel (25), and the baffle (27) blocks the gap between the upper and lower air-cooled battery packs (20).

2. The air-cooled battery pack according to claim 1, characterized in that: One side of the baffle (27) is connected to the insulating cover plate (22), and the other side extends upwards; the baffle (27) of the lower air-cooled battery pack (202) abuts against the base (23) of the upper air-cooled battery pack (201).

3. The air-cooled battery pack according to claim 2, characterized in that: The length of the baffle (27) is less than or equal to the width of the insulating cover plate (22).

4. The air-cooled battery pack according to claim 2, characterized in that: The baffle (27) comprises a first side surface (271), a second side surface (272) and a third side surface (273), wherein the first side surface (271) is close to the panel (25) and parallel to the panel (25), the second side surface (272) is connected to the first side surface (271) and is perpendicular to the first side surface (271), and the third side surface (273) is connected to the insulating cover plate (22) and the second side surface (272) and is parallel to the first side surface (271).

5. The air-cooled battery pack according to claim 4, characterized in that: The base (23) comprises a groove (28), the groove (28) corresponds to the position of the baffle (27), the notch of the groove (28) is downward, the groove (28) runs through both sides of the base (23) in the width direction, and the width direction of the base (23) is the same as the width direction of the insulating cover plate (22).

6. The air-cooled battery pack according to claim 5, characterized in that: The groove (28) includes a first groove wall (281), the first groove wall (281) is close to the panel (25), and after the air-cooled battery pack (20) is installed on the battery rack, the first groove wall (281) abuts against a first side surface (271) of a baffle (27) of a lower air-cooled battery pack (202).

7. The air-cooled battery pack according to claim 2, characterized in that: The insulating cover plate (22) is made of a PC plate, and the baffle plate (27) and the insulating cover plate (22) are integrally bent and formed.

8. An energy storage system, characterized in that: It comprises a plurality of air-cooled battery packs (20) as claimed in any one of claims 1 to 7, wherein the plurality of air-cooled battery packs (20) are placed layer by layer on a battery rack.

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