A novel liquid cooling plate and battery box

Abstract

The utility model provides a novel liquid cooling plate and battery box, novel liquid cooling plate includes water supply pipe, backwater pipe, water storage board and heat exchange board, heat exchange board is located water storage board top, both inner cavities are linked through water guide hole, and water guide hole is dispersed with a plurality of on the bottom surface of heat exchange board, water supply pipe and backwater pipe are connected water storage board and heat exchange board respectively, are used to supply, back water to novel liquid cooling plate respectively, the inner cavity of heat exchange board is equipped with a plurality of independent tertiary flow channel, and tertiary flow channel is the serpentine flow channel, and water guide hole is located the medium input end of tertiary flow channel, and the medium output end of tertiary flow channel is connected backwater pipe, the utility model discloses can make the battery box each part's electric core monomer can be cooled by the water of lower temperature by first water storage, then overflow, and then carries out corresponding heat exchange, is favorable to improve the temperature uniformity of battery module, thereby improves the electric core consistency and performance, and the water of overflow in the inner cavity of cooling plate is separated, guided, orderly transported through tertiary flow channel, and the cooling effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a novel liquid cooling plate and battery box. Background Technology

[0002] With advancements in lithium-ion battery energy storage technology, the industrial and commercial energy storage market is placing higher demands on energy density, safety, and thermal management. Current mainstream energy storage products are trending towards miniaturization, and their compact structure makes the design of thermal management systems even more critical.

[0003] Existing liquid cooling systems mostly adopt a flow channel design based on battery modules, generally using a long, serpentine cooling channel at the bottom, with the cooling medium flowing in from one side and out from the other. Due to the unidirectional nature of the flow channel, the medium gradually heats up during the flow process, resulting in a weaker cooling effect on downstream battery cells than on upstream battery cells. This fails to provide effective and balanced cooling for the battery module, leading to decreased temperature uniformity within the module and affecting cell consistency and performance.

[0004] Therefore, the traditional long serpentine liquid cooling solution is no longer able to meet the market's demand for refined thermal management of energy storage systems. Utility Model Content

[0005] The purpose of this invention is to provide a novel liquid cooling plate and battery box to solve the problems mentioned above.

[0006] The technical solution adopted by this utility model is as follows: a novel liquid-cooled plate, which includes a water supply pipe, a water return pipe, a water storage plate and a heat exchange plate. The heat exchange plate is disposed above the water storage plate, and the inner cavities of the two are connected through water guide holes. Several water guide holes are distributed on the bottom surface of the heat exchange plate. The water supply pipe and the water return pipe are respectively connected to the water storage plate and the heat exchange plate, and are used to supply and return water to the novel liquid-cooled plate.

[0007] Preferably, the inner cavity of the heat exchange plate is provided with several independent tertiary flow channels, the tertiary flow channels are serpentine flow channels, the water guide hole is located at the medium input end of the tertiary flow channel, and the medium output end of the tertiary flow channel is connected to the return water pipe.

[0008] Preferably, the three-stage flow channels are distributed in several groups along the width of the liquid cooling plate, and each group is distributed in several groups along the length of the liquid cooling plate; the medium output ends of several three-stage flow channels in the same group are connected to the secondary flow channels, and the medium output ends of the secondary flow channels are connected to the return water pipe.

[0009] Preferably, the water supply pipe and the water return pipe are located on the same side of the novel liquid cooling plate, and the media output ends of several secondary flow channels are connected to the water return pipe through primary flow channels.

[0010] Preferably, the water supply pipe is located above the heat exchange plate, and the water supply pipe is connected to the inner cavity of the water storage plate through a water supply channel located on the heat exchange plate; the top surface of the water storage plate is provided with a water supply hole corresponding to the water supply channel.

[0011] Preferably, the water supply hole is provided with a flow guiding structure on the side opposite to the water supply channel. The flow guiding structure divides the inner cavity of the water storage plate into a first water storage cavity and a second water storage cavity. The first water storage cavity and the second water storage cavity are connected to the inner bottom surface of the water storage plate through the gap between the bottom end of the flow guiding structure and the second water storage cavity. The water guiding hole corresponds to the second water storage cavity.

[0012] Preferably, the second water storage cavity has an inclined inner bottom surface, the top of which is close to the first water storage cavity.

[0013] Preferably, the water storage plate has an inclined inner bottom surface, and the top of the inclined inner bottom surface is close to the water supply hole.

[0014] The technical solution of this utility model also includes: a battery box, characterized in that the battery box includes a battery module and the above-mentioned novel liquid cooling plate, the heat exchange plate is located between the battery module and the water storage plate, the battery module includes a plurality of individual battery cells, and each individual battery cell corresponds to a different water guide hole.

[0015] The beneficial effects of this utility model are as follows: by first storing water, then overflowing water, and then performing corresponding heat exchange, the individual cells in each part of the battery box can be cooled by water at a lower temperature, which is conducive to improving the temperature uniformity of the battery module, thereby improving the consistency and performance of the cells; through the configuration of the first, second and third stage flow channels, the water overflowing into the inner cavity of the cooling plate is separated, guided and transported in an orderly manner, thereby improving the cooling effect. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the battery box in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the medium flow direction of the water storage plate and heat exchange plate in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the medium flow direction of the heat exchange plate in an embodiment of this utility model;

[0019] Figure 4 This is a first design cross-sectional view of the water storage plate in an embodiment of this utility model;

[0020] Figure 5 This is another cross-sectional view of the water storage plate in this embodiment of the utility model.

[0021] In the picture:

[0022] 1. Individual battery cell;

[0023] 2. Water supply pipe;

[0024] 3. Return water pipe;

[0025] 4. Water storage plate; 41. Inclined inner bottom surface;

[0026] 5. Heat exchange plate; 51. Water guide hole; 52. Tertiary flow channel; 53. Secondary flow channel; 54. Primary flow channel; 55. Water supply channel; 56. Water supply hole;

[0027] 6. Flow guiding structure;

[0028] 7. Support structure. Detailed Implementation

[0029] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "top," "bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, it should be noted that unless otherwise expressly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model through specific circumstances.

[0031] This utility model provides a novel liquid cooling plate and a battery box equipped with this novel liquid cooling plate. By optimizing the water supply method and flow channel configuration of the liquid cooling plate, the cooling effect on each cell in the battery box is improved, the temperature uniformity of the battery module is improved, and thus the consistency and performance of the cells are improved.

[0032] To clearly and concisely introduce this technical solution, the following explanation uses a battery box equipped with the aforementioned novel liquid cooling plate to illustrate the structure and connection relationship between the two.

[0033] Reference Appendix Figure 1-5The battery box provided in this embodiment includes a battery module, a novel liquid cooling plate, and some conventional support structures 7 (existing technology, not described here) for connecting the two. The battery module is located above the novel liquid cooling plate and includes several individual battery cells 1. Several groups of individual battery cells 1 are distributed along the width of the battery box, and several individual battery cells 1 are distributed along the length of the battery box in each group. The novel liquid cooling plate includes a water supply pipe 2, a water return pipe 3, a water storage plate 4, and a heat exchange plate 5. The heat exchange plate 5 is located above the water storage plate 4, that is, the heat exchange plate 5 is located between the battery module and the water storage plate 4. Both the water storage plate 4 and the heat exchange plate 5 are hollow inside, and their inner cavities are connected through water guide holes 51. Several water guide holes 51 are distributed on the bottom surface of the heat exchange plate 5, and each individual battery cell 1 corresponds to a different water guide hole 51. The water supply pipe 2 and the water return pipe 3 are connected to the water storage plate 4 and the heat exchange plate 5, respectively, for supplying and returning water to the novel liquid cooling plate.

[0034] During implementation, water is first supplied to the water storage plate 4 through the water supply pipe 2. After the water storage plate 4 is full of water, the water overflows from the water guide hole 51 on the bottom surface of the heat exchange plate 5, and then exchanges heat with the corresponding battery cell 1 through the top surface of the heat exchange plate 5. The water after heat exchange is discharged through the return water pipe 3.

[0035] By adopting the above technical solution, through water storage, water overflow, and corresponding heat exchange, the individual cells 1 in each part of the battery box can be cooled by water with a lower temperature, which is beneficial to improving the temperature uniformity of the battery module, thereby improving cell consistency and performance.

[0036] In some preferred embodiments, the inner cavity of the heat exchange plate 5 is provided with several independent three-stage flow channels 52. The three-stage flow channels 52 are serpentine flow channels, and their outer peripheral contour dimensions are consistent with the dimensions of the battery cell 1. The water guide hole 51 is located at the medium input end of the three-stage flow channel 52, and the medium output end of the three-stage flow channel 52 is connected to the return water pipe 3. Compared with the aforementioned embodiments, this preferred embodiment uses the three-stage flow channels 52 to separate, guide, and orderly transport the water overflowing into the inner cavity of the cooling plate through each water guide hole 51. This can avoid the problem that water overflowing into the inner cavity of the cooling plate from the water guide hole 51 flows disorderly, and the upstream high-temperature water mixes with the downstream low-temperature water, thereby reducing the effect on the downstream battery cell 1.

[0037] Therefore, this embodiment configures the following scheme for the arrangement of the battery cell 1: several groups of tertiary flow channels 52 are distributed along the width of the liquid cooling plate, and several channels are distributed along the length of the liquid cooling plate in each group; and a secondary flow channel 53 is designed between the medium output end of the tertiary flow channel 52 and the return water pipe 3, so that the water in the tertiary flow channel 52 configured according to the above scheme can be output sequentially through the secondary flow channel 53 and the return water pipe 3. The specific configuration scheme is as follows: the medium output ends of several tertiary flow channels 52 in the same group are connected to the secondary flow channel 53, for example, as shown in the attached diagram. Figure 3The secondary flow channel 53 shown extends along the length of the battery box. The medium output end of the tertiary flow channel 52 is connected to the wide side end of the secondary flow channel 53. The medium output end of the secondary flow channel 53 is connected to the return water pipe 3.

[0038] In some preferred embodiments, the water supply pipe 2 and the return water pipe 3 are located on the same side of the novel liquid cooling plate in order to improve the regularity of the internal structure of the battery box and improve the utilization rate of the internal space of the battery box. For this purpose, the novel liquid cooling plate is configured as follows: the medium output ends of several secondary flow channels 53 are connected to the return water pipe 3 through the primary flow channel 54.

[0039] In practice, the water supply pipe 2 can be configured in various directions, such as on the side of the water storage plate 4 or above the heat exchange plate 5. If it is the latter, a water supply channel 55 can be set on the heat exchange plate 5 (which is not connected to the above-mentioned tertiary channel 52, secondary channel 53, and primary channel 54), and a water supply hole 56 corresponding to the water supply channel 55 can be set on the top surface of the water storage plate 4, so that the water supply pipe 2 can be connected to the inner cavity of the water storage plate 4 through the water supply channel 55 and the water supply hole 56.

[0040] Regardless of the configuration scheme adopted for the water supply pipe 2, in order to achieve the intended effect of this technical solution, it should be ensured that the inner cavity of the water storage plate 4 is completely filled with water before the water overflows evenly from each water guide hole 51.

[0041] If the water supply pipe 2 is located on the side of the water storage plate 4, the water supply pipe 2 should be as close as possible to the bottom surface of the water storage plate 4, and the water flow rate in the water supply pipe 2 should be controlled within a suitable range so that after the water enters the inner cavity of the water storage plate 4, it flows smoothly along the inner bottom surface of the water storage plate 4 from the side of the water supply pipe 2, and the liquid level in the inner cavity of the water storage plate 4 rises smoothly.

[0042] If the water supply pipe 2 is positioned above the cooling plate, any or a combination of the following configurations can be used: (Refer to Appendix) Figure 4-5 (1) A flow guide structure 6 is provided on the side of the water supply hole 56 away from the water supply channel 55. The flow guide structure 6 divides the inner cavity of the water storage plate 4 into a first water storage cavity and a second water storage cavity. The first water storage cavity and the second water storage cavity are connected to the gap between the bottom end of the flow guide structure 6 and the inner bottom surface of the water storage plate 4. The water guide hole 51 corresponds to the second water storage cavity. As an example, the flow guide structure 6 can be a vertical plate structure. (2) An inclined inner bottom surface 41 is provided in the water storage plate 4 (or the second water storage cavity). The top end of the inclined inner bottom surface 41 is close to the water supply hole 56 (or the first water storage cavity).

[0043] The principle of gentle water storage in design (1) is the same as that in the scheme of "water supply pipe 2 is arranged on the side of water storage plate 4". The principle of gentle water storage in design (2) is that after water enters the inner cavity of water storage plate 4 from water supply pipe 2, the water is guided by the inclined inner bottom surface 41 and the water flow rate is controlled by water supply pipe 2. This ensures that the liquid level in the inner cavity of water storage plate 4 rises gently until it is full and overflows.

[0044] Compared with the prior art, this utility model has at least the following advantages: by first storing water, then overflowing water, and then performing corresponding heat exchange, the individual cells 1 in each part of the battery box can be cooled by water with a lower temperature, which is beneficial to improving the temperature uniformity of the battery module, thereby improving the consistency and performance of the cells; through the configuration of the first, second and third stage flow channels 52, the water overflowing into the inner cavity of the cooling plate is separated, guided and transported in an orderly manner, thereby improving the cooling effect.

[0045] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel liquid-cooled plate, characterized in that, It includes a water supply pipe, a water return pipe, a water storage plate, and a heat exchange plate. The heat exchange plate is located above the water storage plate, and the inner cavities of the two are connected through water guide holes. Several water guide holes are distributed on the bottom surface of the heat exchange plate. The water supply pipe and the water return pipe are respectively connected to the water storage plate and the heat exchange plate, and are used to supply and return water to the novel liquid cooling plate.

2. The novel liquid-cooled plate according to claim 1, characterized in that, The heat exchange plate has several independent tertiary flow channels in its inner cavity. The tertiary flow channels are serpentine. The water guide hole is located at the medium input end of the tertiary flow channel, and the medium output end of the tertiary flow channel is connected to the return water pipe.

3. The novel liquid-cooled plate according to claim 2, characterized in that, The three-stage flow channels are distributed in several groups along the width of the liquid cooling plate, and each group is distributed in several groups along the length of the liquid cooling plate; the medium output ends of several three-stage flow channels in the same group are connected to the secondary flow channels, and the medium output ends of the secondary flow channels are connected to the return water pipe.

4. The novel liquid-cooled plate according to claim 3, characterized in that, The water supply pipe and the water return pipe are located on the same side of the novel liquid cooling plate, and the medium output ends of several secondary flow channels are connected to the water return pipe through primary flow channels.

5. The novel liquid-cooled plate according to any one of claims 1-4, characterized in that, The water supply pipe is located above the heat exchange plate, and the water supply pipe is connected to the inner cavity of the water storage plate through a water supply channel located on the heat exchange plate; the top surface of the water storage plate is provided with a water supply hole corresponding to the water supply channel.

6. The novel liquid-cooled plate according to claim 5, characterized in that, The water supply hole is provided with a flow guiding structure on the side opposite to the water supply channel. The flow guiding structure divides the inner cavity of the water storage plate into a first water storage cavity and a second water storage cavity. The first water storage cavity and the second water storage cavity are connected to the inner bottom surface of the water storage plate through the gap between the bottom end of the flow guiding structure and the water guiding hole. The water guiding hole corresponds to the second water storage cavity.

7. The novel liquid-cooled plate according to claim 6, characterized in that, The second water storage chamber has an inclined inner bottom surface, the top of which is close to the first water storage chamber.

8. The novel liquid-cooled plate according to claim 5, characterized in that, The water storage plate has an inclined inner bottom surface, and the top of the inclined inner bottom surface is close to the water supply hole.

9. A battery box, characterized in that, The battery box includes a battery module and a novel liquid cooling plate according to any one of claims 1-8. The heat exchange plate is located between the battery module and the water storage plate. The battery module includes a plurality of individual battery cells, each of which corresponds to a different water guide hole.

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