Power battery liquid cooling plate

Abstract

The utility model discloses a power battery liquid cooling plate which comprises a liquid cooling plate body internally provided with a cooling liquid flow channel, and the liquid cooling plate body is provided with a cooling liquid inlet and a cooling liquid outlet; the cooling liquid flow channel comprises a plurality of heat exchange areas which are arranged side by side in the length direction of the liquid cooling plate body and are relatively independent, and a liquid inlet flow channel and a liquid outlet flow channel which are correspondingly arranged on the two transverse sides of the heat exchange areas respectively and correspondingly communicate with the heat exchange areas respectively, and the cooling liquid inlet communicates with the inlet end of the liquid inlet flow channel; the cooling liquid outlet is communicated with the outlet end of the liquid outlet flow channel, and a plurality of disturbing columns are arranged in the heat exchange area; the liquid cooling plate for the power battery provided by the utility model can be beneficial to improving the heat exchange uniformity of the power battery and improving the heat exchange effect; and meanwhile, the pressure loss of the cooling liquid can be reduced, and the risk of local heat exchange failure of the battery can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, specifically to a liquid cooling plate for power batteries. Background Technology

[0002] Power batteries are key components of new energy electric vehicles, their primary function being to provide power. During operation, power batteries accumulate significant heat internally, potentially leading to reduced battery conversion efficiency and cycle life. Furthermore, in low-temperature winter conditions, excessively low battery temperatures can cause capacity degradation and limited charging / discharging power. Therefore, the ability to quickly and stably cool or heat the power battery, as well as ensuring temperature uniformity, are crucial aspects of power battery thermal management. Liquid cooling plates for power batteries offer excellent heat exchange and are widely used in existing power battery thermal management systems. However, existing liquid cooling plates generally suffer from excessively long flow channels, which can result in poor temperature uniformity. Current technologies typically improve heat exchange uniformity by incorporating turbulence-inducing columns at varying intervals within the flow channels, but this improvement is limited for longer channels; particularly for longer liquid cooling plates, further improvements in heat exchange uniformity are needed. Meanwhile, excessively long flow channels or overly complex flow channel structures can lead to increased pressure loss of the coolant. In addition, after long-term use, some channels of the liquid cooling plate may become blocked, preventing the coolant from flowing normally through the blocked area and causing local heat exchange failure.

[0003] Therefore, it is necessary to provide a new liquid cooling plate structure for power batteries, which is expected to improve the heat exchange uniformity and heat exchange effect of power batteries; at the same time, it can help reduce cooling water pressure loss and reduce the risk of local heat exchange failure of batteries. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a liquid cooling plate for power batteries. The structure of this liquid cooling plate can improve the heat exchange uniformity of power batteries and improve the heat exchange effect. At the same time, it can reduce cooling water loss and reduce the risk of local heat exchange failure of batteries.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a power battery liquid cooling plate, comprising a liquid cooling plate body with internal coolant channels, wherein the liquid cooling plate body is provided with a coolant inlet and a coolant outlet; the coolant channels include multiple heat exchange zones arranged side by side and relatively independent along the length of the liquid cooling plate body, and an inlet channel and an outlet channel respectively disposed on the transverse sides of the heat exchange zones and respectively connected to each heat exchange zone, wherein the coolant inlet is connected to the inlet end of the inlet channel, and the coolant outlet is connected to the outlet end of the outlet channel, and a few interfering flow columns are provided in the heat exchange zones.

[0006] Furthermore, the liquid cooling plate body includes a liquid cooling plate main board and a cover plate, the cover plate being fitted onto the liquid cooling plate main board and forming the coolant flow channel.

[0007] Furthermore, the main body of the liquid cooling plate has a plurality of rectangular grooves arranged side by side along its own length. The two sides of the main body of the liquid cooling plate near the edge are respectively provided with a first groove and a second groove arranged along its own length. After the cover plate is closed, the rectangular grooves form the heat exchange area, the first groove forms the liquid inlet channel, and the second groove forms the liquid outlet channel.

[0008] Furthermore, the middle portions of the transverse sidewalls of the rectangular groove are respectively provided with a first break portion and a second break portion. The rectangular groove is connected to the first groove through the first break portion, and the rectangular groove is connected to the second groove through the second break portion.

[0009] Furthermore, an inlet guide plate is provided at the first fracture section, and an outlet guide plate is provided at the second fracture section.

[0010] Furthermore, the coolant inlet and coolant outlet are located on the main body of the liquid cooling plate, and both are located in the middle of the same end of the main body of the liquid cooling plate.

[0011] Furthermore, both the main body and the cover plate of the liquid cooling plate are made of aluminum alloy.

[0012] Furthermore, each of the aforementioned turbulence columns is arranged in rows and columns within the heat exchange zone.

[0013] Furthermore, the heights of the turbulence columns in the same column along the coolant flow direction increase in a gradient.

[0014] Furthermore, the horizontal cross-section of the turbulence column is airfoil-shaped or elliptical.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The power battery liquid cooling plate provided by this utility model can improve the heat exchange uniformity of the power battery and enhance the heat exchange effect. Simultaneously, it can reduce cooling hydraulic pressure loss and lower the risk of localized battery heat exchange failure. It is particularly suitable for heat dissipation of some longer battery packs. Specifically, by setting multiple relatively independent heat exchange zones arranged side-by-side along the length of the liquid cooling plate body, independent heat exchange can be achieved in each zone, and the flow channel length of a single heat exchange zone is not too long, effectively improving the temperature uniformity along the length of the liquid cooling plate during heat exchange. Due to the short flow channel length and simple internal structure, it also helps reduce the problem of flow channel blockage caused by long-term use, thereby reducing the risk of localized battery heat exchange failure. Of course, the shortened flow channel length and simplified internal structure also help reduce cooling hydraulic pressure loss. Since each heat exchange zone is equipped with a turbulence column, the turbulence column can enhance the heat transfer effect and optimize the flow characteristics, ensuring that each heat exchange zone has a good heat exchange effect, that is, ensuring that the liquid cooling plate has a good heat exchange effect.

[0017] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of an embodiment of the present invention;

[0019] Figure 2 This is a top view of the mainboard of the liquid-cooled plate according to an embodiment of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the transverse section of the liquid cooling plate mainboard;

[0021] Reference numerals in the attached drawings: 1-Liquid cooling plate body; 1a-Heat exchange zone; 1b-Liquid inlet channel; 1c-Liquid outlet channel; 101-Liquid cooling plate main body; 101a-Rectangular groove; 101a1-First fracture section; 101a2-Second fracture section; 101b-First groove; 101c-Second groove; 102-Cover plate; 2-Coolant inlet; 3-Coolant outlet; 4-Breakthrough column; 5-Inlet guide plate; 6-Outlet guide plate. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only for illustrating the basic concept of this utility model. Unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0023] Please see Figure 1-3 This embodiment discloses a power battery liquid cooling plate, including a liquid cooling plate body 1 with internal coolant channels. The liquid cooling plate body 1 has a coolant inlet 2 and a coolant outlet 3. The coolant channels include multiple heat exchange zones 1a arranged side by side and relatively independent along the length of the liquid cooling plate body 1, and inlet channels 1b and outlet channels 1c respectively located on the lateral sides of the heat exchange zones 1a and respectively connected to each heat exchange zone 1a. The coolant inlet 2 is connected to the inlet end of the inlet channel 1b, and the coolant outlet 3 is connected to the outlet end of the outlet channel 1c. The heat exchange zones 1a are provided with minor turbulence columns 4. It can be understood that, for compatibility with power batteries, the battery liquid cooling plate body 1 is generally a rectangular structure; the "lateral direction of the heat exchange zones 1a" mentioned above refers to the horizontal direction of the heat exchange zones 1a. The direction refers to the width of the liquid cooling plate body 1; the heat exchange zone 1a is through which coolant can pass, and the coolant in the zone exchanges heat with the power battery, carrying away the heat generated by the power battery; the heat exchange zones 1a are arranged side by side along the length of the liquid cooling plate body 1 to ensure that the flow channel of each heat exchange zone 1a is relatively short; multiple heat exchange zones 1a are relatively independent, meaning that each heat exchange zone 1a exchanges heat independently, and the coolant in each zone does not flow with each other; the setting of the inlet flow channel 1b and the outlet flow channel 1c can ensure that the coolant in each heat exchange zone 1a flows and participates in the cooling cycle of the power battery cooling system; of course, it can be understood that the number of heat exchange zones 1a can be adapted to the specific length of the battery liquid cooling plate body 1, and here it is set to three; the baffle column 4 preferably adopts airfoil fins or elliptical fins.

[0024] The liquid cooling plate for the power battery in the above structure can improve the heat exchange uniformity and heat exchange effect of the power battery; at the same time, it can reduce cooling hydraulic pressure loss and reduce the risk of local heat exchange failure of the battery; it is particularly suitable for heat exchange of some longer battery packs. Specifically, by setting multiple heat exchange zones 1a arranged side by side and relatively independent along the length of the liquid cooling plate body 1, independent heat exchange can be carried out in each zone, and the flow channel length of a single heat exchange zone 1a is not too long, which effectively improves the temperature uniformity along the length of the liquid cooling plate during heat exchange; due to the short flow channel length and simple internal structure, it is also conducive to reducing the flow channel blockage problem caused by long-term use, thereby reducing the risk of local heat exchange failure of the battery; of course, the shortened flow channel length and simplified internal structure can reduce cooling hydraulic pressure loss; since each heat exchange zone 1a is provided with a turbulence column 4, the turbulence column 4 can enhance the heat transfer effect and optimize the flow characteristics, ensuring that each heat exchange zone 1a has a good heat exchange effect, that is, ensuring that the liquid cooling plate has a good heat exchange effect.

[0025] In this embodiment, the liquid cooling plate body 1 includes a liquid cooling plate main board 101 and a cover plate 102. The cover plate 102 covers the liquid cooling plate main board 101 and forms the coolant flow channel. Specifically, the liquid cooling plate main board 101 and the cover plate 102 can be connected by diffusion welding or brazing. This structural design is simple, easy to process and manufacture, and reduces manufacturing costs.

[0026] In this embodiment, the liquid cooling plate main board 101 has multiple rectangular grooves 101a arranged side by side along its length. The two sides of the liquid cooling plate main board 101 (i.e., the width direction of the liquid cooling plate main board 101) near the edge are respectively provided with a first groove 101b and a second groove 101c arranged along its length. After the cover plate 102 is closed, the rectangular grooves 101a form the heat exchange zone 1a, the first groove 101b forms the liquid inlet channel 1b, and the second groove 101c forms the liquid outlet channel 1c. The forming method of the rectangular grooves 101a, the first groove 101b, and the second groove 101c is not limited; for example, they can all be integrally formed with the liquid cooling plate main board 101, or they can be formed by multiple partition plates. After the cover plate 102 is closed, the top of each groove is sealed, forming the corresponding coolant channel. The coolant channel formed by this structural design is simple in structure, easy to process, and helps reduce manufacturing costs.

[0027] In this embodiment, the middle portions of the sidewalls on both sides of the rectangular groove 101a (i.e., the width direction of the liquid cooling plate main board 101) are respectively provided with a first break portion 101a1 and a second break portion 101a2. The rectangular groove 101a and the first groove 101b are connected through the first break portion 101a1, and the rectangular groove 101a and the second groove 101c are connected through the second break portion 101a2. Specifically, the first break portion 101a1 and the second break portion 101a2 are both rectangular notches opened on the corresponding sidewalls of the rectangular groove 101a. By setting them in the middle of the sidewall, it is beneficial to ensure the uniformity of the flow of coolant when entering and exiting the rectangular groove 101a, improve and enhance the heat exchange uniformity in the heat exchange zone 1a, and thus further improve the heat exchange uniformity of the overall structure.

[0028] In this embodiment, an inlet guide plate 5 is provided at the first break portion 101a1, and an outlet guide plate 6 is provided at the second break portion 101a2. Specifically, the inlet guide plate 5 has a straight plate portion, which is bent towards the rectangular groove 101a from its rear end along the coolant flow direction to form an arc-shaped guide plate portion. The arc-shaped guide plate portion can contact the outer wall of the rectangular groove 101a, or it can retain a small gap. The outlet guide plate 6 also has a straight plate portion, which is bent towards the rectangular groove 101a from its front end along the coolant flow direction to form an arc-shaped guide plate portion. More specifically, there are three heat exchange zones 1a. Figure 2 The inlet guide plate 5 and outlet guide plate 6 of the leftmost heat exchange zone 1a have been removed, but corresponding arc-shaped guide sections are formed directly on the liquid cooling plate main board 101. The guide structure set at the break point facilitates the full flow of coolant to the corresponding heat exchange zone 1a, which helps to improve the fluidity of coolant, further reduce the risk of blockage and improve the heat dissipation effect.

[0029] In this embodiment, the coolant inlet 2 and coolant outlet 3 are disposed on the liquid cooling plate main board 101, and the two are located in the middle of the same end of the liquid cooling plate main board 101; the coolant inlet 2 and coolant outlet 3 are integrated connecting pipes disposed on the liquid cooling plate main board 101; the structure is reasonably designed and arranged, has good structural compactness, and is conducive to the centralized connection of external pipelines.

[0030] In this embodiment, both the main liquid cooling plate 101 and the cover plate 102 are aluminum alloy plates; aluminum alloy plates have good structural strength, which is conducive to lightweight design, and at the same time, aluminum alloy plates have good heat exchange effect.

[0031] In this embodiment, each of the baffle columns 4 is arranged in rows and columns in the heat exchange zone 1a. Specifically, the baffle columns 4 are arranged in multiple rows and columns, with the same spacing between each row and each column. The baffle columns 4 in the next row are staggered from the baffle columns 4 in the previous row. The baffle columns 4 can be formed on the aluminum alloy plate by chemical etching, laser ablation, or stamping. This arrangement is convenient and has a good effect on improving heat dissipation. At the same time, it has low flow resistance and low cooling fluid pressure loss.

[0032] In this embodiment, the heights of the turbulence columns 4 in the same column along the coolant flow direction increase in a gradient. This structural design can gradually enhance the turbulence of the coolant along the flow direction and increase the heat exchange area layer by layer, thereby offsetting the decrease in heat exchange capacity caused by the increase in coolant temperature, which is beneficial to improving the heat exchange uniformity in the heat exchange zone 1a, and further improving the heat exchange uniformity of the overall structure.

[0033] In this embodiment, the horizontal cross-section of the turbulence column 4 is an airfoil or an ellipse. It can be understood that when an airfoil rib structure is used, the large end of the airfoil faces the water-facing side. By using an airfoil or ellipse turbulence column 4, while enhancing the disturbance, the streamlined structure can suppress the generation of separated flow, which helps to reduce the energy loss of the coolant, that is, it helps to further reduce the pressure loss of the coolant while enhancing heat transfer.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A power cell liquid cooling plate, characterized in that: It includes a liquid cooling plate body (1) with a built-in coolant flow channel, and the liquid cooling plate body (1) is provided with a coolant inlet (2) and a coolant outlet (3); The coolant flow channel includes multiple heat exchange zones (1a) arranged side by side and relatively independent along the length of the liquid cooling plate body (1), and an inlet flow channel (1b) and an outlet flow channel (1c) respectively located on the lateral sides of the heat exchange zone (1a) and respectively connected to each heat exchange zone (1a). The coolant inlet (2) is connected to the inlet end of the inlet flow channel (1b), and the coolant outlet (3) is connected to the outlet end of the outlet flow channel (1c). A few turbulent flow columns (4) are provided in the heat exchange zone (1a).

2. The liquid-cooled plate for power battery according to claim 1, characterized in that: The liquid cooling plate body (1) includes a liquid cooling plate main board (101) and a cover plate (102), the cover plate (102) covering the liquid cooling plate main board (101) and forming the coolant flow channel.

3. The liquid-cooled plate for power battery according to claim 2, characterized in that: The liquid cooling plate main board (101) has a plurality of rectangular grooves (101a) arranged side by side along its own length direction. The liquid cooling plate main board (101) has a first groove (101b) and a second groove (101c) arranged along its own length direction on the lateral sides near the edge. After the cover plate (102) is closed, the rectangular grooves (101a) form the heat exchange zone (1a), the first groove (101b) forms the liquid inlet channel (1b), and the second groove (101c) forms the liquid outlet channel (1c).

4. The liquid-cooled plate for power battery according to claim 3, characterized in that: The rectangular groove (101a) has a first fracture portion (101a1) and a second fracture portion (101a2) respectively in the middle of the two transverse side walls. The rectangular groove (101a) is connected to the first groove (101b) through the first fracture portion (101a1), and the rectangular groove (101a) is connected to the second groove (101c) through the second fracture portion (101a2).

5. The liquid-cooled plate for power battery according to claim 4, characterized in that: An inlet guide plate (5) is provided at the first fracture section (101a1), and an outlet guide plate (6) is provided at the second fracture section (101a2).

6. The liquid-cooled plate for power battery of claim 3, wherein: The coolant inlet (2) and coolant outlet (3) are located on the main liquid cooling plate (101) and are situated at the middle of the same end of the main liquid cooling plate (101).

7. The liquid-cooled plate for power battery of claim 2, wherein: Both the main body (101) and the cover plate (102) of the liquid cooling plate are aluminum alloy plates.

8. The liquid-cooled plate for power battery of claim 1, wherein: Each of the aforementioned turbulence columns (4) is arranged in rows and columns in the heat exchange zone (1a).

9. The liquid-cooled plate for power battery of claim 8, wherein: The heights of the turbulence columns (4) in the same column along the coolant flow direction increase in a gradient.

10. The liquid-cooled plate for power battery of claim 8, wherein: The horizontal cross-section of the turbulence column (4) is airfoil-shaped or elliptical.

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