Air-cooled electric box

Abstract

The utility model discloses an air-cooled electric box, which is used for placing a battery module and an air-conditioning system and comprises an equipment shell and a fin cold plate, an inlet and outlet is formed in the surface of the equipment shell, the fin cold plate is plugged on the inlet and outlet, and the fin cold plate is detachably connected with the equipment shell. The external envelope is formed by the equipment shell and the fin cold plate, when refrigeration is needed, a heat dissipation path from the battery module to the fin cold plate and then to the internal circulating air of the equipment shell is formed, high heat dissipation performance is achieved, and meanwhile high energy density and IP protection level are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an air-cooled electric box. Background Art

[0002] In the field of energy storage, lithium battery groups often use battery boxes as the basic unit, and multiple battery boxes are stacked to form a battery cluster. A single battery cluster is mostly used for industrial and commercial energy storage. Traditional energy storage battery boxes use either air cooling or liquid cooling systems for heat dissipation.

[0003] However, the air cooling system has problems such as low energy density, low IP protection level, moisture and dust easily entering the battery system, increased failure rate due to fan selection, and high after-sales maintenance costs. Although the liquid cooling system has high energy density and IP protection level, it also has problems such as high maintenance costs due to water circulation failures and condensed water affecting the insulation and withstand voltage of the system. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an air-cooled electric box which adopts air cooling to dissipate heat while having a higher energy density and IP protection grade.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An air-cooled electric box for placing battery modules and air conditioning systems, including an equipment housing and a finned cold plate;

[0007] The surface of the equipment shell is provided with an inlet and outlet, the fin cold plate is sealed on the inlet and outlet, and the fin cold plate is detachably connected to the equipment shell.

[0008] Furthermore, the device housing has a folded edge arranged around the edge of the entrance and exit;

[0009] The folded edge is detachably connected to the fin cold plate.

[0010] Furthermore, at least two mounting holes are distributed on the folded edge;

[0011] The device housing is bolted to the fin cold plate through the mounting holes.

[0012] Further, it also includes an electric heating film;

[0013] The electric heating film is attached to a surface of the fin cold plate facing the inside of the device housing, and a surface of the electric heating film away from the fin cold plate is attached to the battery module.

[0014] Furthermore, the surface of the electric heating film is coated with a thermally conductive structural adhesive.

[0015] Furthermore, the fin cold plate is one of a step type, a harmonica tube type or a gradient size type.

[0016] Furthermore, a surface of the fin cold plate away from the device housing is provided with thermal insulation foam.

[0017] The beneficial effect of the utility model is that it provides an air-cooled electric box, which is composed of an equipment shell and a fin cold plate to form an external envelope. When cooling is required, a heat dissipation path is formed from the battery module to the fin cold plate and then to the circulating air inside the equipment shell, thereby achieving high heat dissipation performance while having a higher energy density and IP protection level. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structural disassembly of an air-cooled electric box of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a fin cold plate with a gradient size of an air-cooled electric box of the utility model;

[0020] Figure 3 It is a structural schematic diagram of a stepped fin cold plate of an air-cooled electric box of the utility model;

[0021] Figure 4 The utility model is a schematic structural diagram of a harmonica tube-shaped fin cold plate of an air-cooled electric box.

[0022] Description of labels:

[0023] 1. Battery module; 2. Equipment shell; 3. Fin cold plate; 4. Inlet and outlet; 5. Folding edge; 6. Electric heating film; 7. Thermal insulation foam. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] Please refer to Figures 1 to 4 , an air-cooled electric box for placing a battery module 1 and an air conditioning system, comprising an equipment housing 2 and a finned cold plate 3;

[0026] The surface of the equipment housing 2 is provided with an inlet and outlet 4 , the fin cold plate 3 is sealed on the inlet and outlet 4 , and the fin cold plate 3 is detachably connected to the equipment housing 2 .

[0027] From the above description, it can be seen that the beneficial effect of the utility model is that the external envelope is composed of the device housing 2 and the fin cold plate 3. When cooling is required, a heat dissipation path is formed from the battery module 1 to the fin cold plate 3 and then to the circulating air inside the device housing 2, thereby achieving high heat dissipation performance while having a higher energy density and IP protection level.

[0028] Furthermore, the device housing 2 has a folded edge 5 arranged around the edge of the entrance 4;

[0029] The folded edge 5 is detachably connected to the fin cold plate 3 .

[0030] It can be seen from the above description that the folded edge 5 is provided near the inlet and outlet 4, and the folded edge 5 can increase the contact area between the device housing 2 and the fin cold plate 3, thereby improving the protection level of the device.

[0031] Furthermore, at least two mounting holes are distributed on the folded edge 5;

[0032] The device housing 2 is bolted to the fin cold plate 3 through the mounting holes.

[0033] From the above description, it can be seen that the folded edge 5 is bolted to the fin cold plate 3, which is not only tightly fitted, but also firmly connected and easy to disassemble and assemble.

[0034] Furthermore, it also includes an electric heating film 6;

[0035] The electric heating film 6 is attached to a surface of the fin cold plate 3 facing the inside of the device housing 2 , and a surface of the electric heating film 6 away from the fin cold plate 3 is attached to the battery module 1 .

[0036] From the above description, it can be seen that an electric heating film 6 is provided, and its two sides are respectively in contact with the battery module 1 and the fin cold plate 3. The heating method using the electric heating film 6 has higher heat transfer efficiency, faster heating rate, higher energy utilization rate, and improves the uniformity of internal temperature rise.

[0037] Furthermore, the surface of the electric heating film 6 is coated with a heat-conducting structural adhesive.

[0038] From the above description, it can be seen that by coating the thermal conductive structural adhesive, the thermal conductivity of the electric heating film 6 can be improved, so that the temperature change of the battery module 1 is more uniform and rapid.

[0039] Furthermore, the finned cold plate 3 is one of a step type, a harmonica tube type or a gradually changing size type.

[0040] It can be seen from the above description that the type of the finned cold plate 3 can be one of many types, which can be selected according to actual needs.

[0041] Furthermore, a thermal insulation foam 7 is provided on a surface of the fin cold plate 3 away from the device housing 2 .

[0042] From the above description, it can be seen that a thermal insulation foam 7 is provided on the side of the fin cold plate 3 away from the device housing 2, so as to more evenly adjust the heat dissipation speed of the entire device and protect the normal operation of the battery module 1 in some cold environments.

[0043] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is:

[0044] An air-cooled electric box is used to place a battery module 1 and an air conditioning system, including a device housing 2, a fin cold plate 3, and an electric heating film 6; an inlet and outlet 4 is provided on the surface of the device housing 2, and the fin cold plate 3 is sealed on the inlet and outlet 4. The device housing 2 has a folded edge 5 arranged around the edge of the inlet and outlet 4; the folded edge 5 is detachably connected to the fin cold plate 3. The electric heating film 6 is attached to the side of the fin cold plate 3 facing the inside of the device housing 2, and the side of the electric heating film 6 away from the fin cold plate 3 is attached to the battery module 1. Figures 2 to 4 As shown, the finned cold plate 3 is one of a step type, a harmonica tube type or a gradient size type. A heat-insulating foam 7 is provided on a surface of the finned cold plate 3 away from the device housing 2 .

[0045] In this embodiment, when the battery module 1 needs to be cooled due to high temperature, the heat dissipation path of the battery module 1 is as follows: the heat-generating body inside the module → the bottom of the battery module 1 → the electric heating film 6 → the fin cold plate 3 → the circulating air in the equipment. As shown in the figure, the air-conditioning wind flows from left to right in the air-cooled electric box. The battery module 1 does not directly contact the cooling wind and conducts heat through convection, but first conducts heat through the bottom surface and the fin cold plate 3 below, and the fin cold plate 3 then exchanges heat with the circulating air in the equipment (mainly from the air-conditioning system).

[0046] When the battery needs to be heated at low temperature, the heat transfer path is: electric heating film 6 → bottom of the battery module → heat generating body inside the module.

[0047] In this embodiment, if Figure 1 As shown, at least two mounting holes are distributed on the folded edge 5; the device housing 2 is bolted to the finned cold plate 3 through the mounting holes. In other equivalent embodiments, a sealing strip or the like may be further provided at the bottom of the folded edge 5 to improve the protection level.

[0048] In this embodiment, the surface of the electric heating film 6 is coated with a heat-conducting structural adhesive. Compared with the heating by hot air (from the air conditioner) in the battery compartment, the heating method of the electric heating film 6 is that the former transfers heat by solid-to-solid heat conduction, while the latter is heat convection. Therefore, the heating method of the electric heating film 6 has higher heat transfer efficiency, faster heating rate, and higher energy utilization rate; the upper and lower surfaces of the electric heating film 6 are coated with a heat-conducting structural adhesive, or the upper and lower surfaces of the electric heating film 6 are backed with adhesive. The length and width of the heating film are consistent with those of the battery module 1, the thickness is less than 1mm, the heat generation is 200-400W, and the maximum surface temperature of the heating film is ≤60℃.

[0049] Among them, the design of the fin cold plate 3 needs to meet two points: First, to achieve high heat dissipation performance to meet the heat dissipation requirements of the battery cell under charging and discharging conditions, that is, to exchange heat with the flowing air through the increased area of ​​the fins, and the number and height of the fins are key parameters; Second, to achieve balanced heat dissipation between the battery cells in the battery box, to avoid large temperature differences among the battery cells in the battery box due to better or worse local heat dissipation.

[0050] To sum up, the utility model provides an air-cooled electric box, which consists of an equipment shell and a fin cold plate to form an external envelope. When cooling is required, a heat dissipation path is formed from the battery module to the fin cold plate and then to the circulating air inside the equipment shell, thereby achieving high heat dissipation performance. At the same time, an electric heating film is arranged between the battery module and the fin cold plate. The heating method using the electric heating film has higher heat transfer efficiency, faster heating rate, higher energy utilization rate, improved internal temperature rise uniformity, and higher energy density and IP protection level.

[0051] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An air-cooled electric box for placing battery modules and air conditioning systems, characterized in that: It includes a device housing and a finned cold plate; The surface of the equipment shell is provided with an inlet and outlet, the fin cold plate is sealed on the inlet and outlet, and the fin cold plate is detachably connected to the equipment shell.

2. The air-cooled electric box according to claim 1, characterized in that: The device housing has a folded edge arranged around the edge of the entrance; The folded edge is detachably connected to the fin cold plate.

3. The air-cooled electric box according to claim 2, characterized in that: At least two mounting holes are distributed on the folded edge; The equipment housing is bolted to the fin cold plate through the mounting holes.

4. The air-cooled electric box according to claim 1, characterized in that: Also includes an electric heating film; The electric heating film is attached to a surface of the fin cold plate facing the inside of the device housing, and a surface of the electric heating film away from the fin cold plate is attached to the battery module.

5. The air-cooled electric box according to claim 4, characterized in that: The surface of the electric heating film is coated with a heat-conducting structural adhesive.

6. The air-cooled electric box according to claim 1, characterized in that: The finned cold plate is one of a step type, a harmonica tube type or a gradient size type.

7. The air-cooled electric box according to claim 1, characterized in that: A surface of the fin cold plate away from the device housing is provided with thermal insulation foam.

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