Immersed liquid-cooled battery pack

Abstract

The utility model discloses an immersed liquid-cooled battery pack, which comprises a bottom flow guide plate, a first liquid-cooled battery pack, a second liquid-cooled battery pack, a first liquid-cooled battery pack, a second liquid-cooled battery pack and a second liquid-cooled battery pack, the first end plate is vertically connected to the first side, and a liquid inlet and a liquid outlet are formed in the first end plate; the second end plate is vertically connected to the second side; the side flow guide plate is connected to the bottom flow guide plate and extends in the first direction, the first direction is the direction from the first side to the second side, a cavity is defined by the bottom flow guide plate, the first end plate, the second end plate and the side flow guide plate, a first backflow channel is formed in the upper side portion of the side flow guide plate, and a first overflow opening close to the second side is further formed in the upper side portion of the side flow guide plate; the first overflow port, the first backflow channel and the liquid outlet are communicated in sequence; and the battery module is arranged in the cavity. Therefore, the overall runner structure is relatively simple, and compared with a runner-free immersed battery pack, the liquid consumption is reduced, the cost is saved, and uniform heat dissipation can be performed on each position of the battery module.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an immersion liquid-cooled battery pack. Background Art

[0002] As the energy storage density of battery packs increases, the amount of heat dissipated increases. The traditional method of dissipating heat from the bottom and / or sides of the single battery through a liquid cooling plate can no longer meet the demand. Local hot spots are easily formed inside the battery pack, causing a large temperature difference between different batteries, which increases the risk of spontaneous combustion of the single battery inside the battery pack. In order to further improve the heat dissipation efficiency, some high energy storage density battery packs are now beginning to use immersion liquid cooling to cool the single battery. However, existing immersion liquid-cooled battery packs have the problems of large liquid usage and high production costs. Utility Model Content

[0003] In order to overcome the defects of the prior art described above, the utility model provides an immersion liquid-cooled battery pack, aiming to solve the problems of large liquid consumption and high production cost in the existing immersion liquid-cooled battery packs.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A submerged liquid-cooled battery pack, comprising: a bottom guide plate, which is horizontally arranged and has a first side and a second side in the horizontal direction; a first end plate, which is vertically connected to the first side, and the first end plate is provided with a liquid inlet and a liquid outlet; a second end plate, which is vertically connected to the second side; a side guide plate, which is connected to the bottom guide plate and extends along a first direction, the first direction being the direction from the first side to the second side, a cavity is formed between the bottom guide plate, the first end plate, the second end plate and the side guide plate, a first return flow channel is provided on the upper side of the side guide plate, and a first overflow port close to the second side is also provided on the upper side of the side guide plate, the first overflow port, the first return flow channel and the liquid outlet are connected in sequence; a battery module is arranged in the cavity.

[0006] According to some embodiments of the present invention, the liquid outlet is located above the liquid inlet.

[0007] According to some embodiments of the present invention, the first recirculation channel is a channel that penetrates the upper side of the side guide plate along the first direction.

[0008] According to some embodiments of the present utility model, a side wall of the side guide plate located in the cavity is provided with a plurality of first protrusions, a first vertical flow channel is formed between two adjacent first protrusions, and the first vertical flow channel is connected to the cavity.

[0009] According to some embodiments of the utility model, two side guide plates are provided, and the two side guide plates are arranged opposite to each other. The immersed liquid-cooled battery pack also includes an intermediate diverter plate, and the intermediate diverter plate is located between the two side guide plates. The intermediate diverter plate is connected to the bottom guide plate and extends along the first direction.

[0010] According to some embodiments of the utility model, a second overflow port close to the second side is provided on the upper side of the intermediate diverter plate, a second reflux channel is provided on the upper side of the intermediate diverter plate, and the second overflow port, the second reflux channel and the liquid outlet are connected in sequence.

[0011] According to some embodiments of the present invention, a plurality of second protrusions are provided on the side wall of the middle diverter plate, a second vertical flow channel is formed between two adjacent second protrusions, and the second vertical flow channel is connected to the cavity.

[0012] According to some embodiments of the utility model, the immersed liquid-cooled battery pack also includes a plurality of partition plates arranged in the cavity, and the battery module includes a plurality of battery cells; the plurality of partition plates are arranged in a plurality of rows and each row includes a plurality of partition plates, the plurality of rows of partition plates are arranged at intervals along the first direction, and the plurality of partition plates in each row are arranged at intervals along the second direction, and the second direction is perpendicular to the first direction on the plane where the bottom guide plate is located; each of the battery cells is sandwiched between two adjacent rows of partition plates, and a third vertical flow channel is formed between two adjacent partition plates in the same row.

[0013] According to some embodiments of the present invention, the third vertical flow channel includes a first branch channel, a second branch channel and a third branch channel, the first branch channel is located between the first end plate and the battery cell adjacent to the first end plate, the second branch channel is located between two adjacent battery cells, and the third branch channel is located between the second end plate and the battery cell adjacent to the second end plate.

[0014] According to some embodiments of the present invention, the bottom guide plate, the first end plate, the second end plate and the side guide plates are all made of foam material.

[0015] According to some embodiments of the present invention, the immersed liquid-cooled battery pack also includes an upper cover plate, and the upper cover plate is covered on the cavity.

[0016] In summary, the immersion liquid-cooled battery pack provided by the present invention has at least the following technical effects:

[0017] The coolant can flow in the cavity and directly contact the battery module. Specifically, the coolant flows into the cavity from the liquid inlet, the coolant can flow from the first side to the second side along the bottom guide plate, and can flow from bottom to top along the side guide plate. After the coolant flows to the overflow port close to the second side, it can flow to the liquid outlet through the first return channel in the direction opposite to the first direction to complete the cooling cycle. In this way, the overall flow channel structure is relatively simple and easy to process. Compared with the flow channel-free immersion battery pack, the amount of liquid used is reduced, the cost is saved, and the heat dissipation at various positions of the battery module can be evenly distributed, with good heat dissipation consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an immersion liquid-cooled battery pack according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of an immersion liquid-cooled battery pack along a first direction according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the immersed liquid-cooled battery pack of the embodiment of the utility model when the upper cover plate is removed;

[0021] Figure 4 for Figure 3 A partial enlarged view of the middle A part;

[0022] Figure 5 for Figure 3 A partial enlarged view of the middle B part;

[0023] Figure 6 It is a schematic structural diagram of the flow channel structure of an embodiment of the utility model at a first viewing angle;

[0024] Figure 7 It is a structural schematic diagram of the flow channel structure of an embodiment of the utility model at a second viewing angle;

[0025] Figure 8 It is a schematic structural diagram of the flow channel structure of an embodiment of the utility model at a third viewing angle.

[0026] The meanings of the reference numerals are as follows:

[0027] 1. Bottom guide plate; 11. First side; 12. Second side; 2. First end plate; 21. Liquid inlet; 22. Liquid outlet; 3. Side guide plate; 31. First return flow channel; 32. First overflow port; 33. First vertical flow channel; 4. Middle diverter plate; 41. Second return flow channel; 42. Second overflow port; 43. Second vertical flow channel; 5. Second end plate; 6. Spacer plate; 61. Third vertical flow channel; 611. First diverter channel; 612. Second diverter channel; 613. Third diverter channel; 7. Upper cover plate; 8. Battery module; 81. Battery cell. DETAILED DESCRIPTION

[0028] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] See also Figures 1 to 5 , the present embodiment discloses an immersion liquid-cooled battery pack, comprising a bottom guide plate 1, a first end plate 2, a second end plate 5, a side guide plate 3 and a battery module 8; the bottom guide plate 1 is horizontally arranged, and the bottom guide plate 1 has a first side 11 and a second side 12 in the horizontal direction; the first end plate 2 is vertically connected to the first side 11, and the first end plate 2 is provided with a liquid inlet 21 and a liquid outlet 22; the second end plate 5 is vertically connected to the second side 12; the side guide plate 3 is vertically arranged, and the side guide plate 3 is connected to the bottom guide plate 1 and extends along a first direction, and a cavity for cooling liquid to flow is formed between the bottom guide plate 1, the first end plate 2, the second end plate 5 and the side guide plate 3, and the first direction is the direction from the first side 11 to the second side 12 (reference Figure 2 and Figure 8 The upper side of the side guide plate 3 is provided with a first return channel 31, and the upper side of the side guide plate 3 is also provided with a first overflow port 32 close to the second side 12, and the first overflow port 32, the first return channel 31 and the liquid outlet 22 are connected in sequence; the battery module 8 is arranged in the cavity.

[0033] The present embodiment provides an immersion liquid-cooled battery pack, in which the cooling liquid can flow in the cavity and directly contact the battery module 8. Specifically, the cooling liquid flows into the cavity from the liquid inlet 21, and the cooling liquid can flow from the first side 11 to the second side 12 along the bottom guide plate 1, and can flow from bottom to top along the side guide plate 3. After the cooling liquid flows to the overflow port close to the second side 12, it can flow to the liquid outlet 22 in the opposite direction to the first direction through the first return channel 31 to complete the cooling cycle. In this way, the overall flow channel structure is relatively simple and easy to process. Compared with the flow channel-free immersion battery pack, the liquid consumption is reduced, the cost is saved, and the heat dissipation at various positions of the battery module 8 can be evenly performed, and the heat dissipation consistency is good.

[0034] like Figure 1 and Figure 7 As shown, specifically, in this embodiment, the liquid outlet 22 is located above the liquid inlet 21, so that the overall flow channel structure can be more concise and efficient.

[0035] like Figure 2 As shown, specifically, in this embodiment, the first reflow channel 31 is a channel that penetrates the upper side of the side guide plate 3 along the first direction.

[0036] like Figure 3 , Figure 6 and Figure 7 As shown, specifically, in the present embodiment, two side guide plates 3 are provided, and the guide plates 3 on both sides are arranged opposite to each other. Preferably, in the present embodiment, the first end plate 2, the second end plate 5, the bottom guide plate 1 and the side guide plate 3 are all made of foam material, so that it has the advantages of convenient processing and a certain compressive strength after molding.

[0037] like Figure 2 As shown, further, in this embodiment, the immersed liquid-cooled battery pack also includes an upper cover plate 7, and the upper cover plate 7 is arranged on the top of the cavity to limit the liquid level height of the cooling liquid immersion.

[0038] like Figure 6 and Figure 7 As shown, preferably, in this embodiment, in order to provide guidance for the flow of the coolant, the side wall of the side guide plate 3 located in the cavity is provided with a plurality of first protrusions, and a first vertical flow channel 33 is formed between two adjacent first protrusions, and the first vertical flow channel 33 is connected to the cavity, so that the coolant can flow from bottom to top along the first vertical flow channel 33. More preferably, in this embodiment, a plurality of first vertical flow channels 33 are provided, and the plurality of first vertical flow channels 33 are arranged along the first direction.

[0039] Furthermore, in this embodiment, the immersed liquid-cooled battery pack also includes an intermediate diverter plate 4, which is located between the two side guide plates 3. The intermediate diverter plate 4 is connected to the bottom guide plate 1 and extends along the first direction. The intermediate diverter plate 4 can provide a turbulent effect to the flow of the coolant, thereby improving the flow rate and cooling efficiency of the coolant.

[0040] like Figure 3 , Figure 5 and Figure 6 As shown, preferably, in this embodiment, the upper side of the middle diverter plate 4 is provided with a second overflow port 42 close to the second side 12, and the upper side of the middle diverter plate 4 is provided with a second return flow channel 41, and the second overflow port 42, the second return flow channel 41 and the liquid outlet 22 are sequentially connected, so that the first return flow channel 31 and the second return flow channel 41 can both converge to the liquid outlet 22, thereby improving the return efficiency. Specifically, in this embodiment, the second return flow channel 41 is a channel that is arranged along the first direction through the upper side of the middle diverter plate 4.

[0041] like Figure 6 and Figure 7 As shown, more preferably, in the present embodiment, in order to provide guidance for the flow of the coolant, a plurality of second protrusions are provided on the side wall of the middle diverter plate 4, and a second vertical flow channel 43 is formed between two adjacent second protrusions, and the second vertical flow channel 43 is connected to the cavity. Specifically, in the present embodiment, a plurality of second vertical flow channels 43 are provided, and the plurality of second vertical flow channels 43 are respectively provided on both sides of the middle diverter plate 4, and the plurality of second vertical flow channels 43 are arranged at intervals along the first direction.

[0042] like Figure 6 , Figure 7 and Figure 8 As shown, further, in the present embodiment, the immersed liquid-cooled battery pack also includes a plurality of partition plates 6, the battery module 8 includes a plurality of battery cells 81, the plurality of partition plates 6 are arranged in a plurality of rows and each row includes a plurality of partition plates 6, the plurality of rows of partition plates 6 are arranged at intervals along a first direction, the plurality of partition plates 6 in each row are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction on the plane where the bottom guide plate 1 is located; each battery cell 81 is sandwiched between two adjacent rows of partition plates 6, and a third vertical flow channel 61 is formed between two adjacent partition plates 6 in the same row, so that the coolant can flow to each battery cell more fully and evenly, thereby further improving the heat dissipation consistency.

[0043] Specifically, on the plane where the bottom guide plate 1 is located, the second direction is perpendicular to the first direction. More specifically, the second direction can refer to Figure 8 The e2 direction in .

[0044] like Figure 6 , Figure 7 and Figure 8As shown, preferably, in this embodiment, the third vertical flow channel 61 includes a first branch channel 611, a second branch channel 612 and a third branch channel 613, all of which extend vertically. The first branch channel 611 is located between the first end plate 2 and the battery cell 81 adjacent to the first end plate 2, the second branch channel 612 is located between two adjacent battery cells 81, and the third branch channel 613 is located between the second end plate 5 and the battery cell 81 adjacent to the second end plate 5.

[0045] In summary, the immersion liquid-cooled battery pack disclosed in the present utility model can at least bring the following beneficial technical effects:

[0046] 1) The overall flow channel structure is relatively simple and easy to process. Compared with the non-flow channel immersion battery pack, the amount of liquid used is reduced, the cost is saved, and the heat dissipation at each position of the battery module 8 can be uniformly performed, and the heat dissipation consistency is good;

[0047] 2) The middle diverter plate 4 can provide a turbulent effect on the flow of the coolant, thereby improving the flow rate and cooling efficiency of the coolant;

[0048] 3) The first reflux channel 31 and the second reflux channel 41 can both converge to the liquid outlet 22, thereby improving the reflux efficiency;

[0049] 4) The first vertical flow channel 33, the second vertical flow channel 43 and the third vertical flow channel 61 can all provide guidance for the flow of the coolant in the vertical direction.

[0050] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. An immersion liquid-cooled battery pack, characterized in that: include: A bottom guide plate (1), the bottom guide plate (1) being arranged horizontally, and the bottom guide plate (1) having a first side (11) and a second side (12) in a horizontal direction; A first end plate (2), vertically connected to the first side (11), the first end plate (2) being provided with a liquid inlet (21) and a liquid outlet (22); A second end plate (5) vertically connected to the second side (12); A side guide plate (3) connected to the bottom guide plate (1) and extending in a first direction, the first direction being the direction from the first side (11) to the second side (12); a cavity is formed between the bottom guide plate (1), the first end plate (2), the second end plate (5) and the side guide plate (3); a first return flow channel (31) is provided on the upper side of the side guide plate (3); a first overflow port (32) close to the second side (12) is also provided on the upper side of the side guide plate (3); the first overflow port (32), the first return flow channel (31) and the liquid outlet (22) are sequentially connected; A battery module (8) is arranged in the cavity.

2. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The liquid outlet (22) is located above the liquid inlet (21).

3. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The first return flow channel (31) is a channel that penetrates the upper side of the side guide plate (3) along the first direction.

4. The immersion liquid-cooled battery pack according to claim 1, characterized in that: The side wall of the side guide plate (3) located in the cavity is provided with a plurality of first protrusions, and a first vertical flow channel (33) is formed between two adjacent first protrusions, and the first vertical flow channel (33) is connected to the cavity.

5. The submerged liquid-cooled battery pack according to claim 1, characterized in that: Two side guide plates (3) are provided, and the two side guide plates (3) are arranged opposite to each other. The immersed liquid-cooled battery pack also includes an intermediate diverter plate (4), and the intermediate diverter plate (4) is located between the two side guide plates (3). The intermediate diverter plate (4) is connected to the bottom guide plate (1) and extends along the first direction.

6. The immersion liquid-cooled battery pack according to claim 5, characterized in that: The upper side of the middle diverter plate (4) is provided with a second overflow port (42) close to the second side (12), the upper side of the middle diverter plate (4) is provided with a second return flow channel (41), and the second overflow port (42), the second return flow channel (41) and the liquid outlet (22) are connected in sequence.

7. The immersion liquid-cooled battery pack according to claim 6, characterized in that: A plurality of second convex portions are provided on the side wall of the intermediate diverter plate (4), and a second vertical flow channel (43) is formed between two adjacent second convex portions, wherein the second vertical flow channel (43) is connected to the cavity.

8. An immersion liquid-cooled battery pack according to any one of claims 1 to 7, characterized in that: The submerged liquid-cooled battery pack further comprises a plurality of partition plates (6) arranged in the cavity, and the battery module (8) comprises a plurality of battery cells (81); the plurality of partition plates (6) are arranged in a plurality of rows and each row comprises a plurality of partition plates (6), the plurality of rows of partition plates (6) are arranged at intervals along the first direction, and the plurality of partition plates (6) in each row are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction on the plane where the bottom guide plate (1) is located; each of the battery cells (81) is sandwiched between two adjacent rows of partition plates (6), and a third vertical flow channel (61) is formed between two adjacent partition plates (6) in the same row.

9. The submerged liquid-cooled battery pack according to claim 8, characterized in that: The third vertical flow channel (61) comprises a first branch flow channel (611), a second branch flow channel (612) and a third branch flow channel (613); the first branch flow channel (611) is located between the first end plate (2) and the battery cell (81) adjacent to the first end plate (2); the second branch flow channel (612) is located between two adjacent battery cells (81); and the third branch flow channel (613) is located between the second end plate (5) and the battery cell (81) adjacent to the second end plate (5).

10. An immersion liquid-cooled battery pack according to any one of claims 1 to 7, characterized in that: The bottom guide plate (1), the first end plate (2), the second end plate (5) and the side guide plate (3) are all made of foam material.

11. An immersion liquid-cooled battery pack according to any one of claims 1 to 7, characterized in that: The submerged liquid-cooled battery pack further comprises an upper cover plate (7), wherein the upper cover plate (7) is arranged to cover the cavity.

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