Battery box cooling structure and battery box thereof

Abstract

The utility model discloses a battery box cooling structure which comprises a liquid cooling inlet, a liquid cooling outlet, a first liquid cooling pipeline group, a second liquid cooling pipeline group and an up-down communication part, the liquid cooling inlet and the first liquid cooling pipeline group are communicated with each other and are positioned in the upper half area of the battery box; the liquid cooling outlet and the second liquid cooling pipeline group are communicated with each other and are positioned in the lower half area of the battery box; immersion liquid for immersing the battery cell is arranged in the battery box; and the up-down communicating part is vertically arranged between the outflow port of the first liquid cooling pipeline group and the inflow port of the second liquid cooling pipeline group. According to the utility model, the first liquid cooling pipeline group, the second liquid cooling pipeline group and the upper and lower communicating parts which are vertically arranged and used for communicating the two liquid cooling pipeline groups are arranged, so that the temperature of cooling liquid in the first liquid cooling pipeline group at the upper part of the battery box is lower than that of cooling liquid in the second liquid cooling pipeline group at the lower part; therefore, the immersion liquid of the upper part and the immersion liquid of the lower part can exchange heat better, and the final cooling effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery cooling technical field, concretely relates to a battery box cooling structure and battery box thereof. BACKGROUND

[0002] With the development of electric vehicles, the user's requirement for the endurance capability of electric vehicles gradually improves, and in the case of meeting the vehicle body stiffness, greater battery capability density needs to be pursued in the limited vehicle body space. Meanwhile, with the user's requirement for shortening the charging time and the development of fast charging technology, the battery pack heat generation sharply increases, which poses great challenge to the battery pack cooling capability. The liquid cooling plate in the existing battery box directly contacts the battery cell, the liquid cooling effect is poor, and the strength of the liquid cooling plate is low.

[0003] Therefore, a new scheme is urgently needed to solve the above problems. SUMMARY

[0004] The utility model provides a battery box cooling structure, can solve the liquid cooling plate in the battery box of prior art and the direct contact of battery cell, the liquid cooling effect is poor, and the strength of the liquid cooling plate is low problem.

[0005] The utility model provides a battery box cooling structure, including liquid cooling inlet, liquid cooling outlet, first liquid cooling pipe road group, second liquid cooling pipe road group and upper and lower intercommunication part,

[0006] Liquid cooling inlet and first liquid cooling pipe road group are linked together and all are located in the upper half area of battery box,

[0007] Liquid cooling outlet and second liquid cooling pipe road group are linked together and all are located in the lower half area of battery box,

[0008] The battery box is internally provided with the immersion liquid of immersed battery cell,

[0009] The upper and lower intercommunication part is vertically arranged between the flow outlet of first liquid cooling pipe road group and the flow inlet of second liquid cooling pipe road group.

[0010] Further, liquid cooling inlet is communicated with the flow inlet of first liquid cooling pipe road group through liquid cooling inlet connecting part, liquid cooling outlet is communicated with the flow outlet of second liquid cooling pipe road group through liquid cooling outlet connecting part, and liquid cooling inlet connecting part and liquid cooling outlet connecting part are fixedly arranged on the outer end of the shell of battery box.

[0011] Further, the first liquid cooling pipe road group includes a plurality of first liquid cooling pipe road units arranged in parallel, and adjacent two first liquid cooling pipe road units are communicated through a first intermediate connecting part.

[0012] Further, the first liquid cooling pipe unit comprises at least one first liquid cooling pipe, and a plurality of battery cells are arranged in parallel along the length direction in the battery box, and the first liquid cooling pipe is located between two adjacent battery cells.

[0013] Further, the first intermediate connecting part is fixedly arranged outside the battery box.

[0014] Further, the first intermediate connecting part is fixedly arranged outside the battery box.

[0015] Further, the upper and lower communication part is a square structure and is fixedly arranged at the outer end of the shell of the battery box.

[0016] Further, the second liquid cooling pipe group comprises a plurality of second liquid cooling pipe units arranged in parallel, two adjacent second liquid cooling pipe units are communicated through a second intermediate connecting part, the second liquid cooling pipe unit comprises at least one second liquid cooling pipe, the second liquid cooling pipe is located between two adjacent battery cells, the second liquid cooling pipe is located below the first liquid cooling pipe, and the number of the second liquid cooling pipe is same as that of the first liquid cooling pipe.

[0017] Further, the first intermediate connecting part is located above the second intermediate connecting part, the first intermediate connecting part and the second intermediate connecting part are square structures and are fixedly arranged at the outer end of the shell of the battery box.

[0018] The utility model also provides a battery box which comprises the battery box cooling structure.

[0019] Compared with the prior art, the utility model discloses a first liquid cooling pipe group, a second liquid cooling pipe group and an upper and lower communication part arranged vertically for communicating the two, instead of a liquid cooling plate, directly contacting the battery cell through the first liquid cooling pipe group and the second liquid cooling pipe group, so that the cooling liquid temperature in the first liquid cooling pipe group of the upper part of the battery box is less than the cooling liquid temperature in the second liquid cooling pipe group of the lower part, thereby enabling the immersion liquid of the upper and lower parts to better exchange heat, and finally achieving better cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the battery pack box body of the utility model without a cover body and battery cells.

[0021] Figure 2 It is a structural schematic view of the battery pack box body of the utility model without a cover body and battery cells.

[0022] Figure 3 It is a structural schematic view of the battery pack box body of the utility model without a cover body and battery cells.

[0023] Figure 4 It is a structural schematic view of the battery pack box body of the utility model without a cover body and battery cells. Figure 1 It is a structural schematic view of the battery pack box body of the utility model without a cover body and battery cells.

[0024] Figure 5 It is the structural schematic view of battery box cooling structure of the utility model;

[0025] Reference signs: 1, liquid cooling inlet; 2, liquid cooling outlet; 3, first liquid cooling pipe group; 31, first liquid cooling pipe unit; 311, first liquid cooling pipe; 32, first intermediate connecting portion; 4, second liquid cooling pipe group; 41, second liquid cooling pipe unit; 411, second liquid cooling pipe; 42, second intermediate connecting portion; 5, upper and lower communication portion; 6, battery box; 61, electric core; 62, top cover; 7, liquid cooling inlet connecting portion; 8, liquid cooling outlet connecting portion. DETAILED DESCRIPTION

[0026] In order to further understand the utility model content, characteristics and efficacy of the utility model, the following examples are given, and the attached drawings are combined Figures 1-5 The specific description is as follows.

[0027] As Figures 1-5 shown, the utility model provides a kind of battery box cooling structure, including liquid cooling inlet 1, liquid cooling outlet 2, first liquid cooling pipe group 3, second liquid cooling pipe group 4 and upper and lower communication portion 5;

[0028] The liquid cooling inlet 1 and first liquid cooling pipe group 3 are communicated and all located in the upper half area of battery box 6;

[0029] The liquid cooling outlet 2 and second liquid cooling pipe group 4 are communicated and all located in the lower half area of battery box 6;

[0030] The battery box 6 is internally provided with immersion liquid that immerses electric core 61, and top is provided with top cover 62;

[0031] The upper and lower communication portion 5 is vertically arranged between the flow outlet of first liquid cooling pipe group 3 and the flow inlet of second liquid cooling pipe group 4.

[0032] The utility model adopts first liquid cooling pipe group, second liquid cooling pipe group and vertical setting for communicating upper and lower communication portion of both, not through liquid cooling plate but through first liquid cooling pipe group and second liquid cooling pipe group directly contact electric core, so that the cooling liquid temperature in the upper first liquid cooling pipe group of battery box is less than the cooling liquid temperature in the lower second liquid cooling pipe group, so that the immersion liquid of the upper and lower two parts can better exchange heat, so that the final cooling effect is better.

[0033] In the embodiment, as Figure 1As shown, the liquid cooling inlet 1 is connected to the flow inlet of the first liquid cooling pipe group 3 through the liquid cooling inlet connecting part 7, the liquid cooling outlet 2 is connected to the flow outlet of the second liquid cooling pipe group 4 through the liquid cooling outlet connecting part 8, and the liquid cooling inlet connecting part 7 and the liquid cooling outlet connecting part 8 are both fixedly arranged on the outer end of the shell of the battery box 6 by welding. The cylindrical liquid cooling inlet 1 is welded on the end of the liquid cooling inlet connecting part 7, and the cylindrical liquid cooling outlet 2 is welded on the end of the liquid cooling outlet connecting part 8. The liquid cooling inlet 1 and the liquid cooling outlet 2 are connected to a circulating cooling water tank (not shown in the figure), so that the cooling liquid with a lower temperature can always flow in from the liquid cooling inlet 1, and the cooling liquid with a higher temperature after heat exchange can flow out from the liquid cooling outlet 2.

[0034] As shown in Figure 3 and 5 , the first liquid cooling pipe group 3 includes three first liquid cooling pipe units 31 arranged in parallel, and two adjacent first liquid cooling pipe units 31 are connected through a first intermediate connecting part 32. The first intermediate connecting part 32 is fixedly arranged on the outer end of the shell of the battery box 6 by welding. The number of the first intermediate connecting part 32 and the second intermediate connecting part 42 is two, the first intermediate connecting part 32 is arranged above the second intermediate connecting part 42, and two first intermediate connecting parts 32 are arranged on opposite ends of the battery box 6.

[0035] As shown in Figure 3 and 5 , the first liquid cooling pipe unit 31 includes three first liquid cooling pipes 311 in which the cooling liquid is located. A plurality of battery cells 61 are arranged in parallel along the length direction in the battery box 6, and the first liquid cooling pipes 311 are located between two adjacent battery cells 61. The three first liquid cooling pipes 311 first flow into the first intermediate connecting part 32 and then branch into the three first liquid cooling pipes 311 of another first liquid cooling pipe unit 31.

[0036] As a preferred embodiment, as shown in Figure 3 and 5 , a first intermediate connecting pipe (not shown in the figure) corresponding to the three first liquid cooling pipes 311 is arranged in the first intermediate connecting part 32, so that the flow of the cooling liquid is more convenient.

[0037] As shown in Figure 3 and 5 , the up-down communication part 5 is a square structure, and the first intermediate connecting part 32, the second intermediate connecting part 42, the liquid cooling inlet connecting part 7 and the liquid cooling outlet connecting part 8 are also square structures, which are convenient for welding and fixing. The three first liquid cooling pipes 311 of the first liquid cooling pipe unit 31 flow into the three second liquid cooling pipes 411 of the second liquid cooling pipe unit 41 through the up-down communication part 5.Figure 5 The flow direction of the cooling liquid is changed by the up-down communication part 5 in the arrow direction, and the cooling liquid flows to the lower half area of the battery box 6.

[0038] In the embodiment, as shown in the figure, Figure 5 The second liquid cooling pipe group 4 includes three second liquid cooling pipe units 41 arranged in parallel, and two adjacent second liquid cooling pipe units 41 are communicated by a second intermediate connecting part 42.

[0039] In the embodiment, the cooling liquid with low temperature from the circulating cooling water tank enters the liquid cooling inlet connecting part 7 through the liquid cooling inlet 1, flows into another first liquid cooling pipe unit 31 through the first intermediate connecting part 32 from a first liquid cooling pipe unit 31, flows into a second liquid cooling pipe unit 41 through the up-down communication part 5, flows into the next second liquid cooling pipe unit 41 through the second intermediate connecting part 42, and finally flows out of the liquid cooling outlet 2 through the liquid cooling outlet connecting part 8, and then flows into the circulating cooling water tank for cooling, and the above process is repeated to ensure that the temperature in the battery box is always within the normal temperature range through cooperation with the immersion liquid.

[0040] The utility model also provides a battery box, including above-mentioned battery box cooling structure.

[0041] The above-mentioned utility model of the application only expresses the implementation mode of the embodiment of the utility model, and therefore cannot be understood as the limitation of the scope of the utility model patent, and is not any form of the structure of the embodiment of the utility model. It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the embodiment of the utility model, a number of changes and improvements can be made, which belong to the protection scope of the embodiment of the utility model.

Claims

1. A battery box cooling structure, characterized in that: It includes a liquid cooling inlet (1), a liquid cooling outlet (2), a first liquid cooling pipeline group (3), a second liquid cooling pipeline group (4), and an upper and lower connecting part (5); The liquid cooling inlet (1) and the first liquid cooling pipeline group (3) are connected and both are located in the upper half of the battery box (6); The liquid cooling outlet (2) and the second liquid cooling pipeline group (4) are connected and both are located in the lower half of the battery box (6); The battery box (6) is filled with an immersion liquid for immersing the battery cells (61); The upper and lower connecting part (5) is vertically arranged between the outlet of the first liquid cooling pipeline group (3) and the inlet of the second liquid cooling pipeline group (4).

2. The battery box cooling structure according to claim 1, characterized in that: The liquid cooling inlet (1) is connected to the inlet of the first liquid cooling pipeline group (3) through the liquid cooling inlet connection part (7), and the liquid cooling outlet (2) is connected to the outlet of the second liquid cooling pipeline group (4) through the liquid cooling outlet connection part (8). The liquid cooling inlet connection part (7) and the liquid cooling outlet connection part (8) are both fixedly installed on the outer end of the housing of the battery box (6).

3. The battery box cooling structure according to claim 1, characterized in that: The first liquid cooling pipeline group (3) includes a plurality of parallel first liquid cooling pipeline units (31), and two adjacent first liquid cooling pipeline units (31) are connected through a first intermediate connection part (32).

4. The battery box cooling structure according to claim 3, characterized in that: The first liquid cooling pipeline unit (31) includes at least one first liquid cooling pipe (311). Multiple battery cells (61) are arranged parallel to each other along the length direction inside the battery box (6). The first liquid cooling pipe (311) is located between two adjacent battery cells (61).

5. A battery box cooling structure according to claim 4, characterized in that: The first intermediate connecting part (32) is fixedly installed on the outside of the battery box (6).

6. The battery box cooling structure according to claim 5, characterized in that: The first intermediate connecting part (32) is provided with a first intermediate connecting pipe corresponding to one of the multiple first liquid cooling pipes (311).

7. The battery box cooling structure according to claim 1, characterized in that: The upper and lower connecting parts (5) are square structures and are fixedly installed on the outer end of the battery box (6) shell.

8. A battery box cooling structure according to claim 6, characterized in that: The second liquid cooling pipeline group (4) includes a plurality of parallel second liquid cooling pipeline units (41). Two adjacent second liquid cooling pipeline units (41) are connected through a second intermediate connection part (42). The second liquid cooling pipeline unit (41) includes at least one second liquid cooling pipe (411). The second liquid cooling pipe (411) is located between two adjacent cells (61). The second liquid cooling pipe (411) is located below the first liquid cooling pipe (311). The number of second liquid cooling pipes (411) and first liquid cooling pipes (311) is the same.

9. A battery box cooling structure according to claim 8, characterized in that: The first intermediate connecting part (32) is located above the second intermediate connecting part (42). Both the first intermediate connecting part (32) and the second intermediate connecting part (42) are square structures and are fixedly installed on the outer end of the battery box (6).

10. A battery box, characterized in that: Includes the battery box cooling structure as described in any one of claims 1 to 9.

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