Battery pack heat dissipation structure and air-cooled energy storage cabinet

Abstract

The utility model provides a battery pack heat dissipation structure and an air-cooled energy storage cabinet, and relates to the technical field of air-cooled energy storage cabinets. The cabinet body is used for containing a plurality of groups of stacked battery packs, the refrigeration mechanism is arranged in the cabinet body, the partition plate is used for dividing the battery packs into at least two subareas, any subarea is provided with an air inlet channel and an air return channel which are communicated with each other, the air inlet channel is communicated with an air supply outlet of the refrigeration mechanism, and the air return channel is communicated with an air outlet of the refrigeration mechanism. The air return channel communicates with an air return opening of the refrigeration mechanism. According to the battery pack heat dissipation structure, airflow circulation can be formed among the refrigeration mechanism, the air inlet channels, the battery pack and the air return channel, the different air inlet channels are mutually independent, independent air supply can be carried out on different partitions, partition heat dissipation is formed, and more effective air channel isolation is formed; and a large-area airflow wall is not arranged, so that the load bearing of the front door of the cabinet is reduced, and the space occupation of the front door is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air -cooled energy storage cabinet technical field especially is related to a battery pack heat radiation structure and air -cooled energy storage cabinet. BACKGROUND

[0002] In the new energy storage field, the importance of the uniformity of the temperature of the battery cell is reflected in many aspects, such as being conducive to improving the service life of the battery, improving the charging and discharging efficiency, reducing the risk of thermal runaway, reducing the maintenance cost and optimizing the energy management, etc. At present, the temperature control means of the energy storage cabinet mainly includes air cooling and water cooling. At present, the temperature control means of the energy storage cabinet mainly includes air cooling and water cooling, wherein the temperature uniformity of the battery cell of the air-cooled cabinet depends not only on the heat dissipation effect of the air duct inside the battery pack on each battery cell, but also on the uniformity of the flow distribution of the air duct in the cabinet to each battery pack. Therefore, the air-cooled energy storage cabinet with an integrated air conditioner emerges as the times require, which includes a separate battery compartment, the battery pack is placed in the battery compartment in a stacked manner from top to bottom, and the air conditioner sends air into the closed battery compartment to form air circulation. Due to the large air volume of the air conditioner, in the absence of an air duct, the fast air flow speed will cause the battery pack located at the air flow corner to be cooled too much, while other battery packs cannot be cooled enough, thereby causing the temperature difference between the upper and lower battery packs to be too large. It is usually required that the maximum temperature difference of the battery cell of the air-cooled energy storage cabinet does not exceed 8℃.

[0003] In order to overcome the defect that the temperature difference between the upper and lower battery packs is too large, the existing air flow wall is provided at the air supply port of the air conditioner, the air flow wall is provided with a plurality of air outlet holes with different opening area and opening density from top to bottom, so as to reduce the air volume near the air supply port of the air conditioner and increase the air volume at the position far away from the air supply port of the air conditioner, thereby realizing the uniformization of the air volume of the cooling air blown out by the air flow wall from top to bottom, and the battery packs at different heights are in a similar heat dissipation environment.

[0004] However, using the air flow wall to overcome the too large temperature difference between the upper and lower battery packs also has the following defects: the air flow wall will be hung on the front door of the cabinet together with the wall-mounted air conditioner, increasing the load bearing of the front door, and if it is installed in the battery compartment, it may affect the convenience of maintenance and repair, and also may affect the uniform air outlet effect due to being too close to the battery pack. TECHNICAL CONTENT

[0005] The utility model aims at providing a battery pack heat radiation structure and an air-cooled energy storage cabinet to solve the technical problems that the air flow wall is used in the prior art to overcome the too large temperature difference between the upper and lower battery packs, resulting in the above-mentioned many defects. The preferred technical solutions in many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0007] A battery pack heat dissipation structure, comprising a cabinet for accommodating a plurality of groups of stacked battery packs and a refrigeration mechanism arranged inside the cabinet, further comprising a partition plate for dividing the battery packs into at least two sub-zones, any one of the sub-zones having an air inlet channel and an air return channel in communication with each other, the air inlet channel being in communication with an air outlet of the refrigeration mechanism, and the air return channel being in communication with an air inlet of the refrigeration mechanism.

[0008] Preferably, a flow equalization plate is arranged on the air inlet channel.

[0009] Preferably, the flow equalization plate is located between two adjacent layers of the battery packs.

[0010] Preferably, the flow equalization plate is uniformly provided with flow holes.

[0011] Preferably, the partition plate is arranged above, behind and below the adjacent stacked battery packs, the air inlet channel is located between the battery packs and the partition plate, and the air return channel is located inside the battery packs.

[0012] Preferably, the partition plate comprises a top plate, a side plate and a bottom plate connected in sequence, the top plate being located above the battery packs, the side plate being located behind the battery packs, and the bottom plate being located below the battery packs.

[0013] Preferably, the partition plate is a monolithic plate.

[0014] Preferably, the cabinet comprises an upper cover, a base, a first side plate, a second side plate, a back plate, a door plate and a battery compartment bottom plate, the upper cover, the base, the first side plate, the second side plate, the back plate and the door plate are connected to form an outer shell of the cabinet, the battery compartment bottom plate is connected inside the outer shell and is located at the lowermost position of the battery packs, and the partition plate is connected inside the outer shell and is surrounded by the outer shell and the battery packs to form all the air inlet channels, and the refrigeration mechanism is hung on the door plate.

[0015] Preferably, the refrigeration mechanism is a wall-mounted air conditioner.

[0016] An air-cooled energy storage cabinet, comprising a battery pack and the above-mentioned battery pack heat dissipation structure.

[0017] The battery pack heat dissipation structure can form air circulation between the refrigeration mechanism, the air inlet channel, the battery pack and the air return channel, different air inlet channels are independent of each other due to the mutual independence of different partitions, different partitions can be independently air supplied, partition heat dissipation is formed, more effective air duct isolation is formed, and meanwhile, the air inlet channel and the air return channel are only added in the battery compartment, a large-area air flow wall is not arranged, the bearing capacity of the front door of the cabinet is reduced, and the occupation of the space of the front door is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is an external structure diagram of the present application;

[0020] Figure 2 It is an external structure diagram of the present application, and the first side plate is hidden in the drawing for the convenience of display;

[0021] Figure 3 It is a front view structure diagram of the present application, and the first side plate is hidden in the drawing for the convenience of display;

[0022] Figure 4 It is a schematic diagram of the flow direction of air flow of the present application;

[0023] Figure 5 It is an explosion structure diagram of the present application;

[0024] In the drawing, 11 is an air inlet channel, and 12 is an air return channel;

[0025] 2, flow equalizing plate;

[0026] 3, battery pack;

[0027] 4, cabinet body; 41, upper cover; 42, base; 43, first side plate; 44, second side plate; 45, back plate; 46, door plate; 47, battery compartment bottom plate; 48, partition plate; 481, top plate; 482, side plate; 483, bottom plate; 49, heat insulation plate;

[0028] 5, refrigeration mechanism. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0030] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like is based on the drawings and only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. Figure 1

[0031] In the description of the utility model, it is understood that the terms "mounting", "connection", "connection" should be understood broadly unless otherwise explicitly specified and limited, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] With reference to Figures 1 to 5 The utility model provides a kind of battery pack heat dissipation structure, including cabinet 4, refrigeration mechanism 5 and baffle 48.

[0033] Several groups of battery pack 3 are stacked and accommodated in the inside of cabinet 4 and are arranged at intervals in vertical direction, refrigeration mechanism 5 is arranged in the inside of cabinet 4, baffle 48 is arranged above, rear and below adjacent stacked battery pack 3, baffle 48 can divide battery pack 3 located in the inside of cabinet 4 into at least two subareas, and at least two battery packs 3 are provided in the inside of each subarea.

[0034] Any one subarea has mutually open air inlet channel 11 and return air passage 12, air inlet channel 11 can be connected with the air outlet of refrigeration mechanism 5, return air passage 12 is located in the inside of battery pack, return air passage 12 can be connected with the air return of refrigeration mechanism 5, so air circulation can be formed between refrigeration mechanism 5, air inlet channel 11, battery pack 3 and return air passage 12.

[0035] ​Since different partitions are independent of each other, different air inlet channels 11 are independent of each other, and can independently supply air to different partitions to form partition cooling and more effective air duct isolation.

[0036] The refrigeration mechanism 5 is preferably a wall-mounted air conditioner, which generally adopts an upper air supply and lower air return mode, and thus can adapt to the air inlet channel 11 and the air return channel 12 mentioned in the embodiment.

[0037] Since the air supply port of the wall-mounted air conditioner is located at the upper part of the cabinet 4 and is higher than the topmost battery pack 3, all the air inlet channels 11 preferably pass through above the topmost battery pack 3 in parallel, and then turn downward from the rear of the cabinet 4, and then sequentially communicate with the battery packs 3 inside the corresponding partitions.

[0038] The inside of each air inlet channel 11 is provided with a flow uniformizing plate 2 between the adjacent two layers of battery packs 3. The flow uniformizing plate 2 is located on the path before the air return channel 12 entering the battery pack. By placing the flow uniformizing plate 2 at the air inlet position on the back of each layer of battery pack 3, the flow uniformizing plate 2 can simultaneously play the roles of flow guiding and flow uniformizing. The high-speed and concentrated air flow can slow down and disperse to the entire cross section of the air duct under the blocking action of the flow uniformizing plate 2, so that the cooling air is homogenized.

[0039] The flow uniformizing plate 2 is provided with flow holes, which are uniformly distributed on the flow uniformizing plate 2. The uniformly distributed flow holes can more evenly disperse the cooling air. When the high-speed air flow passes through the flow holes, the air flow speed gradually slows down, so that the cold air flow is more evenly distributed in the cross section of the air inlet channel 11. At the same time, the flow uniformizing plate 2 does not completely cover the entire cross section of the air inlet channel 11, and does not force the total air volume to pass through the flow holes of the flow uniformizing plate 2, thereby reducing the air resistance encountered by the air conditioner air supply and reducing the loss of the original air volume.

[0040] In the embodiment, the wall-mounted air conditioner adopts an upper air supply and lower air return form. The cold air is divided into at least two air inlet channels 11 when entering the battery compartment. The flow uniformizing plate 2 is arranged at the air inlet position on the back of each layer of battery pack 3 before the cold air contacts the battery pack 3. After the high-speed cold air flow from top to bottom passes through the flow uniformizing plate 2, on the one hand, the flow uniformizing plate 2 plays a flow guiding role to provide cooling air volume for the current battery pack 3. If there is no flow guiding, the high-speed air flow will continue to dive downward, and the current battery pack 3 will not get enough cooling air volume. On the other hand, when the high-speed air flow passes through the flow holes of the flow uniformizing plate 2, the air flow speed gradually slows down, so that the cold air flow is more evenly distributed in the air duct.

[0041] The battery pack heat dissipation structure mentioned in the embodiment does not provide a large-area air flow wall, and therefore the air conditioner does not need to be selected in a mode of lower air supply and upper air return, and can be selected in a mode of upper air supply and lower air return, such as the wall-mounted air conditioner of the embodiment.

[0042] In addition, due to the air inlet channel 11 and the flow uniformizing plate 2, a structure for flow uniformization does not need to be provided on the front door of the cabinet, the air flow uniformization design of the air conditioner is simplified, the load on the front door of the cabinet is effectively reduced, and the space occupation of the front door is reduced.

[0043] In the embodiment, the cabinet body 4 specifically includes an upper cover 41, a base 42, a first side plate 43, a second side plate 44, a back plate 45, a door plate 46, a battery compartment bottom plate 47, and a heat insulation plate 49.

[0044] The upper cover 41, the base 42, the first side plate 43, the second side plate 44, the back plate 45, and the door plate 46 form six outer surfaces of the cabinet body 4 and are connected to form an outer shell of the cabinet body 4.

[0045] The battery compartment bottom plate 47 is connected to the inside of the outer shell and is located below the lowermost battery pack 3.

[0046] The partition plate 48 is arranged in the inside of the outer shell and forms all the air inlet channels 11 together with the outer shell and the battery pack 3. The partition plate 48 can be in a structure of an integral plate or can be composed of a top plate 481, a side plate 482, and a bottom plate 483 connected in sequence. The top plate 481 is located above the battery pack 3, the side plate 482 is located behind the battery pack 3, and the bottom plate 483 is located below the battery pack 3. One end of the top plate 481 is located at the air supply port of the wall-mounted air conditioner, and the other end of the top plate 481 is connected to the top end of the side plate 482. The bottom end of the side plate 482 is connected to one end of the bottom plate 483, and the other end of the bottom plate 483 is close to the air return port of the wall-mounted air conditioner. Each two adjacent air inlet channels 11 are actually separated by a top plate 481, a side plate 482, and a bottom plate 483. The separated air inlet channels 11 can realize independent air supply and form a partitioned heat dissipation.

[0047] The heat insulation plate 49 is arranged on the top of the uppermost battery pack 3. The heat insulation plate 49 can form the air inlet channel 11 connected to the uppermost battery pack 3 and can play a heat insulation role between the battery pack 3 and the air inlet channel 11, so that the cold air flow of the air inlet channel 11 does not lose too much cold energy when passing above the uppermost battery pack 3.

[0048] The wall-mounted air conditioner is hung on the door plate 46.

[0049] The structure setting state of the embodiment is preferably shown in the drawings, and the number of the air inlet channels 11 is two, and the number of the battery packs 3 is five, and the two air inlet channels 11 form a first air inlet air duct and a second air inlet air duct, respectively;

[0050] Correspondingly, the specific structure of the first air inlet air duct is composed of the top plate 481, the heat insulation plate 49, the side plate 482, the bottom plate 483, the first side plate 43, the second side plate 44 and one flow uniformizing plate 2;

[0051] Correspondingly, the specific structure of the second air inlet air duct is composed of the top plate 481, the upper cover 41, the back plate 45, the battery compartment bottom plate 47, the first side plate 43, the second side plate 44 and two flow uniformizing plates 2;

[0052] The five battery packs 3 form two partitions, the upper two battery packs 3 form one partition, and the lower three battery packs form one partition, the first air inlet air duct is communicated with the upper two battery packs 3, and the second air inlet air duct is communicated with the lower three battery packs 3;

[0053] Since the first air inlet air duct is communicated with only two battery packs 3, one flow uniformizing plate 2 is arranged on the first air inlet air duct, and since the second air inlet air duct is communicated with three battery packs 3, two flow uniformizing plates 2 are arranged on the second air inlet air duct;

[0054] The first air inlet air duct passing through the corresponding interval segment above the topmost battery pack 3 is located below the second air inlet air duct, and in this way, the layout of the first air inlet air duct and the second air inlet air duct is more reasonable, and the space is fully utilized.

[0055] Embodiment two

[0056] Referring Figures 1 to 5 The utility model also provides a kind of air-cooled energy storage cabinet, and the air-cooled energy storage cabinet includes the above-mentioned battery pack heat dissipation structure, and further includes battery pack 3, which is contained in the cabinet body 4 inside the battery pack heat dissipation structure.

[0057] The air-cooled energy storage cabinet contains battery pack 3 by adopting the above-mentioned battery pack heat dissipation structure, can independently air supply to different partitions, form partition heat dissipation, form more effective air duct isolation;

[0058] The battery pack heat dissipation structure does not set up large-area airflow wall, so it is no longer required to select the mode of lower air supply and upper air return when selecting air conditioner, and can be suitable for air conditioner selection of upper air supply and lower air return.

[0059] In addition, due to the arrangement of the air inlet air duct 11 and the flow uniformizing plate 2, it is not necessary to set a structure for flow uniformization on the front door of the cabinet body, which simplifies the air flow uniformity design of air conditioner air supply, effectively reduces the load bearing of the front door of the cabinet body, and reduces the occupation of the space of the front door.

[0060] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery pack heat dissipation structure, comprising a cabinet for accommodating a plurality of stacked battery packs and a cooling mechanism disposed inside the cabinet, characterized in that, It also includes a partition for dividing the battery pack into at least two partitions, each of which has an air inlet channel and an air return channel that are interconnected. The air inlet channel is connected to the air outlet of the refrigeration mechanism, and the air return channel is connected to the air return outlet of the refrigeration mechanism.

2. The battery pack heat dissipation structure according to claim 1, characterized in that, A flow equalization plate is installed on the air inlet channel.

3. The battery pack heat dissipation structure according to claim 2, characterized in that, The current equalization plate is located between two adjacent battery pack layers.

4. The battery pack heat dissipation structure according to claim 2, characterized in that, The flow equalization plate has flow holes evenly distributed on it.

5. The battery pack heat dissipation structure according to claim 1, characterized in that, The partition is disposed above, behind and below the adjacent stacked battery packs, the air inlet channel is located between the battery pack and the partition, and the air return channel is located inside the battery pack.

6. The battery pack heat dissipation structure according to claim 5, characterized in that, The partition includes a top plate, a side plate, and a bottom plate connected in sequence. The top plate is located above the battery pack, the side plate is located behind the battery pack, and the bottom plate is located below the battery pack.

7. The battery pack heat dissipation structure according to claim 5, characterized in that, The partition is a single piece of board.

8. The battery pack heat dissipation structure according to claim 1, characterized in that, The cabinet includes a top cover, a base, a first side panel, a second side panel, a back panel, a door panel, and a battery compartment bottom panel. The top cover, the base, the first side panel, the second side panel, the back panel, and the door panel are connected to form the outer shell of the cabinet. The battery compartment bottom panel is connected to the inside of the outer shell and is located at the bottom of the battery pack. The partition is connected to the inside of the outer shell and, together with the outer shell and the battery pack, forms all the air intake channels. The refrigeration mechanism is mounted on the door panel.

9. The battery pack heat dissipation structure according to claim 1, characterized in that, The refrigeration mechanism is a wall-mounted air conditioner.

10. A wind-cooled energy storage cabinet, characterized in that, Includes a battery pack and the battery pack heat dissipation structure as described in any one of claims 1-9.

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