Extrusion forming liquid cooling plate

Abstract

The utility model discloses an extrusion forming liquid cooling plate which comprises a liquid cooling plate body, two ends of the liquid cooling plate body are connected with a front current collector and a rear current collector, and a liquid cooling plate channel is arranged in the liquid cooling plate body. The front current collector comprises a first stage and a second stage, a cooling liquid inlet is formed in the middle of the first stage, and front first channels are formed in two sides; a cooling liquid outlet is formed in the middle of the second stage, and front second channels are formed on two sides; the first stage is higher than the second stage, the upper cover plate in the middle of the second stage and the front second flow channel partition plate connected with the upper cover plate extend to the first stage, an upper-layer space is formed in the first stage, and a lower-layer space is formed in the front current collector; a return channel is arranged in the rear current collector, and a loop is formed by the cooling liquid inlet, the upper-layer space, the front first channel, the front second channel, the liquid cooling plate channel, the return channel, the liquid cooling plate channel, the lower-layer space and the cooling liquid outlet. According to the liquid cooling plate, the flow of the flow channel in the liquid cooling plate can be effectively distributed, the phenomenon of non-uniform temperature of a battery cell is avoided, and the use safety of the battery cell is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to an extrusion-molded liquid cooling plate. Background Art

[0002] The existing extrusion-molded liquid cooling plate can achieve various flow forms in the flow channels by installing current collectors at the front and back of the liquid cooling plate. However, at present, it is very difficult to achieve the uniformity of the flow rate of each flow channel in this form of liquid cooling plate, and the temperatures on both sides in the width direction of the battery cell are generally higher than the temperature in the middle. As a result, the temperatures of the battery cells in contact with the liquid cooling plate are uneven, resulting in poor temperature consistency among the battery cells, and even thermal runaway may occur, causing serious consequences. Content of the Utility Model

[0003] The purpose of the utility model is to provide an extrusion-molded liquid cooling plate, which can effectively distribute the flow rate of the flow channels in the liquid cooling plate, avoid the occurrence of uneven temperatures of the battery cells, and improve the use safety of the battery cells.

[0004] To achieve the above purpose, the extrusion-molded liquid cooling plate of the utility model includes a liquid cooling plate body. The two ends of the liquid cooling plate body along the length direction of the liquid cooling plate body are respectively connected with a front current collector and a rear current collector. The inside of the liquid cooling plate body is separated by a number of liquid cooling plate flow channel partitions parallelly distributed along the length direction of the liquid cooling plate body to form a number of liquid cooling plate channels;

[0005] The front current collector includes a first stage far from the liquid cooling plate body and a second stage close to the liquid cooling plate body. A coolant inlet is provided in the middle of the first stage, and a number of front first flow channel partitions are arranged on both sides along the width direction of the liquid cooling plate body to form a number of front first channels; a coolant outlet is provided in the middle of the second stage, and a number of front second flow channel partitions are arranged on both sides along the width direction of the liquid cooling plate body to form a number of front second channels; the front first flow channel partitions are correspondingly connected with the liquid cooling plate flow channel partitions on both sides of the liquid cooling plate body in the width direction through the front second flow channel partitions;

[0006] The first stage is higher than the second stage. The upper cover plate where the coolant outlet is located in the middle of the second stage and the front second flow channel partitions connected to both ends of the upper cover plate extend into the first stage to form an upper space in the first stage and a lower space in the front current collector;

[0007] The inside of the rear current collector is separated by a number of rear flow channel partitions to form a number of return channels, and the rear flow channel partitions are correspondingly connected with the liquid cooling plate flow channel partitions in the middle of the liquid cooling plate body;

[0008] Coolant inlet - upper space - front first channel - front second channel - liquid cooling plate channels on both sides of the liquid cooling plate body - return channel - liquid cooling plate channels in the middle of the liquid cooling plate body - lower space - coolant outlet are sequentially connected to form a loop.

[0009] As a further solution of the utility model: the upper cover plate where the coolant outlet in the middle of the second stage is located is connected with a number of spoiler columns in the upper space, and the spoiler columns are distributed on both sides of the coolant inlet.

[0010] As a further solution of the utility model: the first stage is a trapezoidal structure, and the inflection point of the front first flow channel partition is an obtuse angle.

[0011] As a further solution of the utility model: the rear current collector includes two groups of symmetrical trapezoidal cavities, and the rear flow channel partitions are surrounded by a plurality of trapezoidal structures which are surrounded in sequence in the trapezoidal cavities.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1) It can avoid the situation where the temperature of different parts of the battery cell is inconsistent due to uneven distribution of coolant between the channels of the liquid cooling plate;

[0014] 2) The coolant enters twice along the width of the liquid cooling plate and exits in the middle, which can help deal with the situation where the temperature on both sides of the cell measurement width is higher under the battery pack cooling condition, and the coolant with lower temperature that enters initially can take away more heat;

[0015] 3) By adjusting the width of the front first channel and the front second channel in the front current collector, the flow rate of each liquid cooling plate channel can be controlled, and adaptive adjustment can be made according to actual use needs;

[0016] 4) The rear current collector is composed of two sets of symmetrical trapezoidal cavity structures, which can reduce flow resistance and energy consumption compared with the traditional rectangular structure;

[0017] 5) The first stage of the front current collector is a trapezoidal structure, and the inflection point of the internal front first flow channel baffle is an obtuse angle, which is more conducive to drainage and reduces the coolant flow resistance at the inflection point;

[0018] 6) The design of the spoiler column in the front collector can fully mix the coolant and make it more uniform in the width direction of the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the extruded liquid cooling plate of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the extruded liquid cooling plate of the utility model.

[0021] Figure 3 yes Figure 2 The middle part is a schematic diagram of the structure with the upper cover removed.

[0022] In the figure: 1. Liquid cooling plate body; 2. Front current collector; 2.1. First stage; 2.2. Second stage; 3. Coolant inlet; 4. Coolant outlet; 5. Upper cover plate; 6. Rear current collector; 7. Liquid cooling plate flow channel partition; 8. Liquid cooling plate channel; 9. Front second flow channel partition; 10. Front second channel; 11. Front first channel; 12. Front first flow channel partition; 13. Upper space; 14. Turbulence posts; 15. Rear flow channel partition; 16. Return channel; 17. Lower space. Detailed implementation mode

[0023] The present utility model will be further described below with reference to the accompanying drawings.

[0024] As Figures 1 to 3 shown, an extruded liquid cooling plate includes a liquid cooling plate body 1. The two ends of the liquid cooling plate body 1 along the length direction of the liquid cooling plate body 1 are respectively connected with a front current collector 2 and a rear current collector 6. The inside of the liquid cooling plate body 1 is divided into a plurality of liquid cooling plate channels 8 by a plurality of liquid cooling plate flow channel partitions 7 distributed in parallel along the length direction of the liquid cooling plate body 1;

[0025] The front current collector 2 includes a first stage 2.1 far from the liquid cooling plate body 1 and a second stage 2.2 close to the liquid cooling plate body 1. A coolant inlet 3 is provided in the middle of the first stage 2.1, and a plurality of front first channels 11 are formed by a plurality of front first flow channel partitions 12 on both sides along the width direction of the liquid cooling plate body 1; A coolant outlet 4 is provided in the middle of the second stage 2.2, and a plurality of front second channels 10 are formed by a plurality of front second flow channel partitions 9 on both sides along the width direction of the liquid cooling plate body 1; The front first flow channel partitions 12 are correspondingly connected with the liquid cooling plate flow channel partitions 7 on both sides of the liquid cooling plate body 1 in the width direction through the front second flow channel partitions 9;

[0026] The first stage 2.1 is higher than the second stage 2.2. The upper cover plate 5 where the coolant outlet 4 is located in the middle of the second stage 2.2 and the front second flow channel partitions 9 connected to both ends of the upper cover plate 5 extend into the first stage 2.1 to form an upper space 13 in the first stage 2.1 and a lower space 17 in the front current collector 2;

[0027] The inside of the rear current collector 6 is divided into a plurality of return channels 16 by a plurality of rear flow channel partitions 15, and the rear flow channel partitions 15 are correspondingly connected with the liquid cooling plate flow channel partitions 7 in the middle of the liquid cooling plate body 1;

[0028] The coolant inlet 3 - upper space 13 - front first channel 11 - front second channel 10 - liquid cooling plate channels 8 on both sides of the liquid cooling plate body 1 - return channel 16 - liquid cooling plate channels 8 in the middle of the liquid cooling plate body 1 - lower space 17 - coolant outlet 4 are sequentially connected to form a loop.

[0029] A stable coolant circulation circuit is established, entering from both sides in the width direction of the liquid cooling plate body 1 and flowing out in the middle, which can achieve cooling the high-temperature area of the battery cell with the low-temperature area of the coolant, thereby taking away more heat and making the overall stability of the battery cell more uniform.

[0030] In order to enable the coolant to be more fully mixed after entering and flow more uniformly into the first channel 11 in the width direction of the liquid cooling plate body 1 before entering, further, a plurality of spoiler columns 14 are connected in the upper cover plate 5 where the coolant outlet 4 is located in the middle of the second stage 2.2 within the upper layer space 13, and the spoiler columns 14 are distributed on both sides of the coolant inlet 3.

[0031] Further, the first stage 2.1 is of a trapezoidal structure, and the inflection point of the front first flow channel partition 12 is an obtuse angle, which is more conducive to guiding the flow and reducing the flow resistance of the coolant at the inflection point.

[0032] Further, the rear current collector 6 includes two groups of symmetric trapezoidal cavities, and the rear flow channel partition 15 encloses a number of sequentially surrounding trapezoidal structures within the trapezoidal cavities, further reducing the flow resistance and promoting the circulation of the coolant within the circuit.

[0033] When the present utility model is specifically used, coolant is injected through the coolant inlet 3, and the coolant sequentially passes through the upper layer space 13 - the front first channel 11 - the front second channel 10 - the liquid cooling plate channels 8 on both sides of the liquid cooling plate body 1 - the return channel 16 - the liquid cooling plate channels 8 in the middle of the liquid cooling plate body 1 - the lower layer space 17, and finally flows out from the coolant outlet 4. Under the action of the spoiler columns 14, the coolant is more evenly distributed after entering. With the assistance of the structures of the rear current collector 6, the first stage 2.1, and the front first flow channel partition 12, the coolant flows more smoothly, which is more conducive to taking away the heat of the battery cell and keeping the battery cell within a safe temperature range.

Claims

1. An extruded liquid cooling plate, comprising a liquid cooling plate body (1), wherein the liquid cooling plate body (1) is respectively connected to a front current collector (2) and a rear current collector (6) at two ends along the length direction of the liquid cooling plate body (1), characterized in that: The interior of the liquid cooling plate body (1) is divided into a plurality of liquid cooling plate flow channel partitions (7) distributed in parallel along the length direction of the liquid cooling plate body (1) to form a plurality of liquid cooling plate channels (8); The front current collector (2) comprises a first stage (2.1) away from the liquid cooling plate body (1) and a second stage (2.2) close to the liquid cooling plate body (1); the first stage (2.1) is provided with a cooling liquid inlet (3) in the center, and is separated by a plurality of front first flow channel baffles (12) on both sides along the width direction of the liquid cooling plate body (1) to form a plurality of front first channels (11); the second stage (2.2) is provided with a cooling liquid outlet (4) in the center, and is separated by a plurality of front second flow channel baffles (9) on both sides along the width direction of the liquid cooling plate body (1) to form a plurality of front second channels (10); the front first flow channel baffles (12) are connected to the liquid cooling plate flow channel baffles (7) on both sides of the liquid cooling plate body (1) in the width direction through the front second flow channel baffles (9); The first stage (2.1) is higher than the second stage (2.2); the upper cover plate (5) where the coolant outlet (4) in the middle of the second stage (2.2) is located and the front second flow channel baffle plates (9) connected to the two ends of the upper cover plate (5) extend into the first stage (2.1), forming an upper space (13) in the first stage (2.1) and a lower space (17) in the front current collector (2); The interior of the rear current collector (6) is divided by a plurality of rear flow channel baffles (15) to form a plurality of reflux channels (16), and the rear flow channel baffles (15) are correspondingly connected to the liquid cooling plate flow channel baffles (7) in the middle of the liquid cooling plate body (1); The cooling liquid inlet (3) - the upper space (13) - the front first channel (11) - the front second channel (10) - the cooling plate channels (8) on both sides of the cooling plate body (1) - the return channel (16) - the cooling plate channel (8) in the middle of the cooling plate body (1) - the lower space (17) - the cooling liquid outlet (4) are connected in sequence to form a loop.

2. The extruded liquid cooling plate according to claim 1, characterized in that: The upper cover plate (5) where the coolant outlet (4) in the middle of the second stage (2.2) is located is connected to a number of spoiler columns (14) in the upper space (13), and the spoiler columns (14) are distributed on both sides of the coolant inlet (3).

3. The extruded liquid cooling plate according to claim 1 or 2, characterized in that: The first stage (2.1) is a trapezoidal structure, and the inflection point of the front first flow channel baffle (12) is an obtuse angle.

4. The extruded liquid cooling plate according to claim 1 or 2, characterized in that: The rear current collector (6) comprises two groups of symmetrical trapezoidal cavities, and the rear flow channel separator (15) forms a plurality of sequentially surrounding trapezoidal structures within the trapezoidal cavities.

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