Battery pack heat dissipation cold plate structure

Abstract

The utility model discloses a battery pack heat dissipation cold plate structure which comprises a back plate and a cover plate, the middle of the back plate sinks to form a sinking groove, a heat conduction groove is formed in the sinking groove, a welding edge is formed on the back plate and located on the periphery of the sinking groove, and the welding edge is defined by a first edge, a second edge, a third edge and a fourth edge. Wherein a first positioning groove is formed in the first edge, a positioning hole is formed in the first positioning groove, a second positioning groove embedded with the first positioning groove is formed in the cover plate, the cover plate is welded to the back plate through the friction stir welding technology, and a heat dissipation channel is formed between the cover plate and the back plate. The heat dissipation channel is formed by the heat conduction groove formed in the sinking groove and the cover plate, cooling liquid is conveyed into the heat dissipation channel through the liquid inlet in one end of the heat dissipation channel and discharged through the liquid outlet, and the effect of evenly reducing the surface temperature of the cold plate is achieved; and the connection sealing performance of the cold plate and the battery can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack heat dissipation cold plates, and specifically relates to a battery pack heat dissipation cold plate structure. Background Technique

[0002] With the rapid development of the renewable energy industry, the structure of the energy Internet is continuously optimized, and the construction of energy storage systems is the future development trend of the energy network. In energy storage technologies, electrochemical energy storage has the characteristics of short construction period and low operating cost, and has developed rapidly. According to the CNES included angle a data, lithium-ion battery energy storage accounts for 90% in electrochemical energy storage, and the battery temperature is a key parameter affecting battery performance and life.

[0003] At present, it is very difficult to achieve uniform temperature distribution at each position of the cold plate in the internal flow channel design of the cold plate on the market. The temperature distribution on the surface of the cold plate also determines the heat dissipation uniformity. A large temperature difference will cause the working environment temperature of the components to be uneven, affecting the heat dissipation effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a battery pack heat dissipation cold plate structure, which has the advantage of uniform heat dissipation and solves the problem of uneven working environment temperature of the battery pack.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A battery pack heat dissipation cold plate structure includes a back plate and a cover plate. A sinking groove is formed in the middle of the back plate, and a heat conduction groove is arranged in the sinking groove. Welding edges are formed around the sinking groove on the back plate. The welding edges are surrounded by a first edge, a second edge, a third edge, and a fourth edge. A first positioning groove is arranged on the first edge, and a positioning hole is opened in the first positioning groove. A second positioning groove that fits with the first positioning groove is arranged on the cover plate, and the cover plate is welded to the back plate by friction stir welding process, and a heat dissipation channel is formed between the cover plate and the back plate.

[0006] Preferably, the heat conduction groove is arranged in a snake-like shape and is in contact with the cover plate. The cross-section of the heat conduction groove is U-shaped, and the depth value of the heat conduction groove is between 26 mm and 28 mm.

[0007] Preferably, a welding position is arranged at the opening of the sinking groove on the back plate, and the welding position is distributed along the circumferential direction of the sinking groove.

[0008] Preferably, a stamping surface is arranged between the sinking groove and the fourth edge, and a plurality of special-shaped holes perpendicular to the stamping surface are opened on the stamping surface.

[0009] Preferably, an included angle a is formed between the second edge and the back plate, and the degree of the included angle a is between 114° and 116°.

[0010] Preferably, an included angle b is formed between the stamping surface and the back plate, and the degree of the included angle b is between 107° and 109°.

[0011] Preferably, a liquid inlet and a liquid outlet are respectively arranged at both ends of the heat dissipation channel.

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

[0013] 1. By providing a sunken groove, a heat conduction groove, a cover plate, a heat dissipation channel, a liquid inlet and a liquid outlet, the present utility model forms a heat dissipation channel through the heat conduction groove opened in the sunken groove and the cover plate, conveys a coolant into the heat dissipation channel from the liquid inlet at one end of the heat dissipation channel, and discharges it from the liquid outlet, achieving the effect of uniformly reducing the surface temperature of the cold plate.

[0014] 2. Through the second edge and the stamping surface, and by setting the angles between the second edge and the stamping surface and the back plate, the present utility model can increase the connection sealing performance between the cold plate and the battery. Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the vertical sectional structural schematic diagram of the present utility model;

[0017] Figure 3 is of the present utility model Figure 2 is the enlarged schematic diagram of the structure at A in

[0018] Figure 4 is the horizontal sectional structural schematic diagram of the present utility model;

[0019] Figure 5 is the side view structural schematic diagram of the present utility model.

[0020] The reference numerals and names in the drawings are as follows:

[0021] 1. Back plate; 101. Sunken groove; 102. Heat conduction groove; 103. First edge; 104. Second edge; 105. Third edge; 106. Fourth edge; 107. First positioning groove; 2. Cover plate; 201. Second positioning groove; 3. Heat dissipation channel; 4. Welding position; 5. Stamping surface; 501. Shaped hole; 6. Liquid inlet; 7. Liquid outlet. Detailed Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless otherwise specifically defined.

[0024] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0025] Please refer to Figures 1 to 5, an embodiment provided by the present utility model: a battery pack heat dissipation cold plate structure, including a back plate 1 and a cover plate 2. A sunken groove 101 is formed in the middle of the back plate 1, and a heat conduction groove 102 is arranged in the sunken groove 101. Welding edges are formed around the sunken groove 101 on the back plate 1, and the welding edges are surrounded by a first edge 103, a second edge 104, a third edge 105, and a fourth edge 106. A first positioning groove 107 is arranged on the first edge 103, and a positioning hole is opened in the first positioning groove 107. A second positioning groove 201 that is fitted with the first positioning groove 107 is arranged on the cover plate 2, and the cover plate 2 is welded to the back plate 1 by friction stir welding, and a heat dissipation channel 3 is formed between the cover plate 2 and the back plate 1; the heat conduction groove 102 is arranged in a shape like a snake, and the heat conduction groove 102 is in contact with the cover plate 2. The cross-section of the heat conduction groove 102 is U-shaped, and the depth value of the heat conduction groove 102 is between 26 mm and 28 mm; a welding position 4 is arranged at the opening of the sunken groove 101 on the back plate 1, and the welding position 4 is distributed along the circumferential direction of the sunken groove 101; a stamping surface 5 is arranged between the sunken groove 101 and the fourth edge 106, and a plurality of special-shaped holes 501 perpendicular to the stamping surface 5 are opened on the stamping surface 5; an included angle a is formed between the second edge 104 and the back plate 1, and the degree of the included angle a is between 114° and 116°; an included angle b is formed between the stamping surface 5 and the back plate 1, and the degree of the included angle b is between 107° and 109°. Liquid inlets 6 and liquid outlets 7 are respectively arranged at both ends of the heat dissipation channel 3.

[0026] Working principle: During the operation of the present utility model, the cover plate 2 is welded to the side of the back plate 1 by friction stir welding. The heat conduction groove 102 arranged in the sunken groove 101 is in contact with the cover plate 2 to form a heat dissipation channel 3. Cooling liquid is conveyed into the heat dissipation channel 3 through the liquid inlet 6 and discharged through the liquid outlet 7, thereby completing uniform temperature reduction. The obliquely arranged second edge 104 and stamping surface 5 can better fit the battery pack. The back plate 1 and the cover plate 2 are positioned and fitted through the first positioning groove 107 and the second positioning groove 201, and the back plate 1 and the cover plate 2 are fixed by screws.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A heat dissipation cold plate structure for a battery pack, comprising a back plate (1) and a cover plate (2), characterized in that: A sinking groove (101) is formed by sinking in the middle of the backplane (1), and a heat conduction groove (102) is arranged in the sinking groove (101). Welding edges are formed around the sinking groove (101) on the backplane (1). The welding edges are surrounded by a first edge (103), a second edge (104), a third edge (105), and a fourth edge (106). A first positioning groove (107) is arranged on the first edge (103), and a positioning hole is opened in the first positioning groove (107). A second positioning groove (201) that fits with the first positioning groove (107) is arranged on the cover plate (2). The cover plate (2) is welded to the backplane (1) by friction stir welding, and a heat dissipation channel (3) is formed between the cover plate (2) and the backplane (1).

2. The heat dissipation cold plate structure of a battery pack according to claim 1, characterized in that: The heat conduction groove (102) is arranged in a shape like a snake, and the heat conduction groove (102) is in contact with the cover plate (2). The cross-section of the heat conduction groove (102) is U-shaped, and the depth value of the heat conduction groove (102) is between 26 mm and 28 mm.

3. A battery pack heat dissipation cold plate structure according to claim 1, characterized in that: A welding position (4) is arranged at the opening of the sinking groove (101) on the backplane (1), and the welding position (4) is distributed along the circumferential direction of the sinking groove (101).

4. A battery pack heat dissipation cold plate structure according to claim 1, characterized in that: A stamping surface (5) is arranged between the sinking groove (101) and the fourth edge (106), and a plurality of special-shaped holes (501) perpendicular to the stamping surface (5) are opened on the stamping surface (5).

5. A battery pack heat dissipation cold plate structure according to claim 1, characterized in that: An included angle a is formed between the second edge (104) and the backplane (1), and the degree of the included angle a is between 114° and 116°.

6. The heat dissipation cold plate structure of a battery pack according to claim 4, characterized in that: An included angle b is formed between the stamping surface (5) and the backplane (1), and the degree of the included angle b is between 107° and 109°.

7. A battery pack heat dissipation cold plate structure according to claim 1, characterized in that: Liquid inlets (6) and liquid outlets (7) are respectively arranged at both ends of the heat dissipation channel (3).

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