Fuse and battery pack

Abstract

The utility model belongs to the battery package technical field, propose a kind of fuse and battery package, wherein, fuse includes fuse body, and the outer surface of fuse body is equipped with heat sink;The heat sink includes liquid cooling component, and the outer surface of fuse body is installed in liquid cooling component, and heat-conducting silicone grease is arranged between liquid cooling component and fuse body.Through heat-conducting silicone grease, improve the heat transfer efficiency between different structures (liquid cooling component and fuse body), simultaneously, heat-conducting silicone grease can realize the efficient heat conduction of the outer surface of fuse pipe body and the inner surface of liquid cooling jacket by smearing, improve the heat dissipation efficiency, further reduce the heat accumulation of the heat generated by fuse body, protect fuse and surrounding electrical devices.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and specifically relates to a fuse and a battery pack. Background Technology

[0002] Fuses are a core component of electric vehicles. Currently, most fuses used in electric vehicles are connected in series in the circuit. When the current is below the minimum fusing current, the fuse itself continuously generates heat. If this heat cannot be dissipated in time, it will gradually accumulate and form high temperatures. Prolonged high temperatures not only affect the fuse's lifespan but also cause the temperature of nearby electrical components to rise, potentially leading to thermal runaway. To reduce the impact of the heat generated by the fuse on the fuse itself and nearby electrical components, fuses with higher current-carrying capacity are usually selected to reduce heat generation. However, fuses with higher current-carrying capacity also increase in size and weight, and the fuse tube temperature will be higher. Furthermore, given the limited space in electric vehicles, this increases design complexity, and fuses with higher current-carrying capacity also increase the manufacturing cost of electric vehicles.

[0003] Therefore, how to reduce the impact of heat accumulation during fuse use on the fuse itself and other electrical components without increasing the fuse's current carrying capacity is a problem that urgently needs to be solved in this field. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a fuse, comprising a fuse body, wherein a heat dissipation device is installed on the outer surface of the fuse body; the heat dissipation device includes a liquid cooling component, which is installed on the outer surface of the fuse body, and thermally conductive silicone grease is disposed between the liquid cooling component and the fuse body.

[0005] Furthermore, the liquid cooling assembly includes several liquid cooling sleeves, which are sequentially and fixedly connected, and the several liquid cooling sleeves are fitted onto the outer surface of the fuse body.

[0006] Furthermore, the outer surface of the liquid cooling jacket is provided with a liquid inlet and a liquid outlet, which are located at the corners of the outer surface of the liquid cooling jacket.

[0007] Furthermore, the liquid cooling jacket includes a first arc-shaped liquid cooling plate and a second arc-shaped liquid cooling plate, which are connected to form an arc-shaped sleeve with a flow channel. The liquid inlet and liquid outlet are respectively located at the corners of the outer surface of the second arc-shaped liquid cooling plate.

[0008] Furthermore, the projection of the flow channel is Z-shaped.

[0009] Furthermore, the fuse body includes a fuse tube, and fixing blocks are provided at both ends of the fuse tube, with fixing holes provided on the fixing blocks.

[0010] Furthermore, the fuse tube is cylindrical.

[0011] Furthermore, the fuse also includes a fastening device that connects two opposing liquid cooling jackets.

[0012] Furthermore, the fastening device includes a bolt and a nut, the bolt being threaded through two opposing liquid-cooled sleeves and connected to the nut.

[0013] A battery pack includes a battery box, battery cells, and the aforementioned fuse, wherein the battery cells and the fuse are installed in the battery box and are electrically connected.

[0014] The beneficial effects of this utility model are: 1. The fuse of this utility model has a heat dissipation device installed on its outer surface; the heat dissipation device includes a liquid cooling component, which is installed on the outer surface of the fuse body, and thermal grease is provided between the liquid cooling component and the fuse body; the thermal grease improves the heat transfer efficiency between different structures (liquid cooling component and fuse body), and the thermal grease can achieve efficient heat conduction between the outer surface of the fuse tube and the inner surface of the liquid cooling jacket by application, thereby improving the heat dissipation efficiency, reducing the heat accumulation of the fuse body, and protecting the fuse and surrounding electrical components.

[0015] 2. The liquid cooling assembly of the fuse of this utility model includes several liquid cooling sleeves, which are spliced ​​together to form a sleeve and are sequentially fixedly connected. The liquid cooling sleeves are fitted onto the outer surface of the fuse body. The shape of the liquid cooling assembly is adapted to the cylindrical surface contour of the fuse body. The liquid cooling sleeves on the fuse body facilitate installation and allow coolant to be introduced into the several liquid cooling sleeves simultaneously, which can achieve uniform heat dissipation on the surface of the fuse body and improve the heat dissipation efficiency of the fuse body.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of the fuse in an embodiment of this utility model is shown.

[0019] Figure 2 A schematic diagram showing the liquid cooling assembly and thermal grease installation positions of the fuse in an embodiment of this utility model is shown.

[0020] Figure 3 A schematic diagram of the explosion of the fuse in an embodiment of this utility model is shown.

[0021] Figure 4 A schematic diagram of the liquid cooling jacket of the fuse in an embodiment of this utility model is shown.

[0022] Figure 5 It shows Figure 4 A cross-sectional view of point AA.

[0023] Figure 6 A schematic diagram of the fuse body of the fuse in an embodiment of this utility model is shown.

[0024] In the diagram, 1 is the heat dissipation device; 11 is the liquid cooling assembly; 111 is the liquid cooling jacket; 1111 is the liquid inlet; 1112 is the liquid outlet; 1113 is the flow channel; 1114 is the first arc-shaped liquid cooling plate; 1115 is the second arc-shaped liquid cooling plate; and 12 is the thermal grease. 2. Fuse body; 21. Fixing hole; 22. Fixing block; 23. Fuse tube; 3. Fastening device; 31. Bolt; 32. Nut. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Example 1, refer to Figure 1A fuse includes a fuse body 2, with a heat dissipation device 1 mounted on its outer surface. The heat dissipation device 1 includes a liquid cooling assembly 11, which is mounted on the outer surface of the fuse body 2. Thermally conductive grease 12 is disposed between the liquid cooling assembly 11 and the fuse body 2. Specifically, the heat dissipation device 1 includes a liquid cooling assembly 11 and thermally conductive grease 12. The liquid cooling assembly 11 includes two symmetrically arranged liquid cooling sleeves 111. The thermally conductive grease 12 is located between the liquid cooling sleeves 111 and the fuse body 2. The thermally conductive grease 12 improves the heat transfer efficiency between the different structures (liquid cooling assembly 11 and fuse body 2). At the same time, the thermally conductive grease 12 can achieve efficient heat conduction between the outer surface of the fuse tube 23 and the inner surface of the liquid cooling sleeves 111 through application, improving heat dissipation efficiency and reducing the heat accumulation generated by the fuse body 2, thus protecting the fuse and surrounding electrical components.

[0027] refer to Figure 3 The liquid cooling assembly 11 includes two liquid cooling sleeves 111, which are joined together to form a sleeve. The two liquid cooling sleeves 111 are placed opposite each other and fixedly connected. The two liquid cooling sleeves 111 are fitted onto the outer surface of the fuse body 2. Specifically, the shape of the liquid cooling assembly 11 is adapted to the cylindrical surface contour of the fuse body 2. The liquid cooling sleeves 111 are symmetrically arranged on the fuse body 2, which facilitates installation and allows the two liquid cooling sleeves 111 to be simultaneously circulated with coolant, thus achieving consistent heat dissipation on the surface of the fuse body 2 and improving the heat dissipation efficiency of the fuse body 2.

[0028] In another optional embodiment, the liquid cooling assembly 11 includes three liquid cooling sleeves 111, which are spliced ​​together to form a sleeve. The three liquid cooling sleeves 111 are connected in sequence and fixedly connected to each other. The three liquid cooling sleeves 111 are fitted onto the outer surface of the fuse body 2. Specifically, the shape of the liquid cooling assembly 11 is adapted to the cylindrical surface contour of the fuse body 2. The liquid cooling sleeves 111 are symmetrically arranged on the fuse body 2, which facilitates installation and allows the three liquid cooling sleeves 111 to be simultaneously circulated with coolant, thus achieving uniform heat dissipation on the surface of the fuse body 2 and improving the heat dissipation efficiency of the fuse body 2.

[0029] In another optional embodiment, the liquid cooling assembly 11 includes four liquid cooling sleeves 111, which are spliced ​​together to form a sleeve. The four liquid cooling sleeves 111 are connected in sequence and fixedly connected to each other. The four liquid cooling sleeves 111 are fitted onto the outer surface of the fuse body 2. Specifically, the shape of the liquid cooling assembly 11 is adapted to the cylindrical surface contour of the fuse body 2. The liquid cooling sleeves 111 are symmetrically arranged on the fuse body 2, which facilitates installation and allows the four liquid cooling sleeves 111 to be simultaneously circulated with coolant, thus achieving uniform heat dissipation on the surface of the fuse body 2 and improving the heat dissipation efficiency of the fuse body 2.

[0030] refer to Figure 4 The liquid cooling jacket 111 has an inlet 1111 and an outlet 1112 on its outer surface, which are located at the corners of the outer surface of the liquid cooling jacket 111. Specifically, the inlet 1111 and the outlet 1112 are located at opposite corners of the liquid cooling jacket 111.

[0031] refer to Figure 5 The liquid cooling jacket 111 includes a first arc-shaped liquid cooling plate 1114 and a second arc-shaped liquid cooling plate 1115. The first arc-shaped liquid cooling plate 1114 and the second arc-shaped liquid cooling plate 1115 are connected to form an arc-shaped sleeve with a flow channel 1113. The liquid inlet 1111 and the liquid outlet 1112 are respectively disposed on the outer surface of the second arc-shaped liquid cooling plate 1115, and the liquid inlet 1111 and the liquid outlet 1112 are respectively located at the corners of the outer surface of the second arc-shaped liquid cooling plate 1115. Specifically, the liquid cooling jacket 111 includes an inlet 1111, an outlet 1112, a flow channel 1113, a first arc-shaped liquid cooling plate 1114, and a second arc-shaped liquid cooling plate 1115. The liquid cooling jacket 111 is welded into a semi-circular structure by the first arc-shaped liquid cooling plate 1114 and the second arc-shaped liquid cooling plate 1115. The shape of the liquid cooling component 11 is adapted to the cylindrical surface contour of the fuse body 2. The liquid cooling jackets 111 are symmetrically arranged on the fuse body 2, which facilitates installation. On the other hand, the two liquid cooling jackets 111 are simultaneously supplied with coolant, which can achieve consistent heat dissipation on the surface of the fuse body 2 and improve the heat dissipation efficiency of the fuse body 2. The inlets 1111 and outlets 1112 on the two liquid cooling jackets 111 are staggered to ensure that the surface temperature of the fuse body 2 is complementary, thereby achieving uniform heat dissipation on the surface of the fuse body 2.

[0032] refer to Figure 4 The projection of flow channel 1113 is Z-shaped.

[0033] refer to Figure 6 The fuse body 2 includes a fuse tube 23, with fixing blocks 22 at both ends of the fuse tube 23. Each fixing block 22 has a fixing hole 21. Specifically, the fuse body 2 includes fixing blocks 22, fixing holes 21, and the fuse tube 23. The fixing holes 21 penetrate the fixing blocks 22. The fixing blocks 22 and fixing holes 21 are symmetrically arranged about the fuse tube 23. The fixing holes 21 on the fixing blocks 22 allow for effective fixing of the fuse body 2.

[0034] Furthermore, the fuse tube 23 is cylindrical. Specifically, the fuse tube 23 can be configured in other shapes as needed, such as a prism, an ellipse, and other shapes.

[0035] refer to Figure 1The fuse also includes a fastening device 3, which connects two opposing liquid cooling jackets 111. Specifically, each heat dissipation device uses four fastening devices 3. Two fastening devices 3 are installed on each side of the heat dissipation device 1, and two connecting plates are provided on each side of the liquid cooling jacket 111. The fastening devices 3 pass through the two opposing connecting plates for fixation, thereby achieving a fixed connection between the two opposing liquid cooling jackets 111.

[0036] refer to Figure 3 The fastening device 3 includes a bolt 31 and a nut 32. The bolt 31 passes through two opposing liquid cooling sleeves 111 and is threadedly connected to the nut 32. Specifically, the fastening device 3 includes a bolt 31 and a nut 32. The two symmetrically arranged liquid cooling sleeves 111 are fastened to the surface of the fuse body 2 by the bolt 31 and the nut 32, resulting in a more secure connection and higher heat transfer efficiency.

[0037] Example 2, A fuse includes a fuse body 2, a heat dissipation device 1, and a fastening device 3. The fuse body 2 is elliptical and includes a fixing block 22, a fixing hole 21, and a fuse tube 23. The fixing hole 21 penetrates the fixing block 22, and the fixing block 22 and the fixing hole 21 are symmetrically arranged about the fuse tube 23, which can effectively fix the fuse body 2. The fastening device 3 includes a bolt 31 and a nut 32. Two symmetrically arranged liquid cooling jackets 111 are fastened to the surface of the fuse body 2 by the bolt 31 and the nut 32, resulting in a more secure connection and higher heat transfer efficiency.

[0038] The heat dissipation device 1 includes a liquid cooling component 11 and thermal grease 12, as shown in the reference. Figure 2 The liquid cooling assembly 11 includes two symmetrically arranged liquid cooling jackets 111. Thermal grease 12 is located between the liquid cooling jackets 111 and the fuse body 2. The thermal grease 12 improves the heat transfer efficiency between the different materials, thus enhancing the heat transfer capacity between the liquid cooling jackets 111 and the fuse body 2. The liquid cooling jackets 111 include an inlet 1111, an outlet 1112, a flow channel 1113, a first arc-shaped liquid cooling plate 1114, and a second arc-shaped liquid cooling plate 1115. The liquid cooling jackets 111 are connected by the first arc-shaped liquid cooling plate 1114 and the second arc-shaped liquid cooling plate 1115. The components are welded into a semi-circular structure. The shape of the liquid cooling component 11 is adapted to the cylindrical surface contour of the fuse body 2. The liquid cooling jackets 111 are symmetrically arranged on the fuse body 2. This facilitates installation and allows the two liquid cooling jackets 111 to be simultaneously supplied with coolant, which can achieve consistent heat dissipation on the surface of the fuse body 2 and improve the heat dissipation efficiency of the fuse body 2. The liquid inlet 1111 and liquid outlet 1112 on the two liquid cooling jackets 111 are staggered to ensure that the surface temperature of the fuse body 2 is complementary, thereby achieving uniform heat dissipation on the surface of the fuse body 2.

[0039] Example 3, A fuse includes a fuse body 2, a heat dissipation device 1, and a fastening device 3. The fuse body 2 is a hexagonal prism and includes a fixing block 22, a fixing hole 21, and a fuse tube 23. The fixing hole 21 penetrates the fixing block 22, and the fixing block 22 and the fixing hole 21 are symmetrically arranged about the fuse tube 23, which can effectively fix the fuse body 2. The fastening device 3 includes bolts 31 and nuts 32. Three symmetrically arranged liquid cooling jackets 111 are fastened to the surface of the fuse body 2 by bolts 31 and nuts 32, resulting in a more secure connection and higher heat transfer efficiency.

[0040] The heat dissipation device 1 includes a liquid cooling assembly 11 and thermal grease 12. The liquid cooling assembly 11 includes three symmetrically arranged liquid cooling jackets 111. The thermal grease 12 is located between the liquid cooling jackets 111 and the fuse body 2. The thermal grease 12 improves the heat transfer efficiency between different materials, thus enhancing the heat transfer capacity between the liquid cooling jackets 111 and the fuse body 2. The liquid cooling jackets 111 include an inlet 1111, an outlet 1112, a flow channel 1113, a first arc-shaped liquid cooling plate 1114, and a second arc-shaped liquid cooling plate 1115. The liquid cooling jackets 111 pass through the first arc-shaped liquid cooling plate 111. 4. The second arc-shaped liquid cooling plate 1115 is welded into a semi-circular structure. The shape of the liquid cooling component 11 is adapted to the hexagonal prism surface contour of the fuse body 2. The liquid cooling jackets 111 are symmetrically arranged on the fuse body 2. On the one hand, it is convenient for installation. On the other hand, the three liquid cooling jackets 111 are simultaneously supplied with coolant, which can achieve uniform heat dissipation on the surface of the fuse body 2 and improve the heat dissipation efficiency of the fuse body 2. The liquid inlet 1111 and liquid outlet 1112 on the two liquid cooling jackets 111 are staggered to ensure that the surface temperature of the fuse body 2 is complementary, thereby achieving uniform heat dissipation on the surface of the fuse body 2.

[0041] Example 4, A battery pack includes a battery box, battery cells, and fuses as described in Examples 1-3, wherein the battery cells and fuses are installed in the battery box and are electrically connected.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuse, characterized in that, The fuse body (2) is provided with a heat dissipation device (1) on its outer surface. The heat dissipation device (1) includes a liquid cooling component (11) which is installed on the outer surface of the fuse body (2). Thermal grease (12) is provided between the liquid cooling component (11) and the fuse body (2).

2. A fuse according to claim 1, characterized in that, The liquid cooling assembly (11) includes several liquid cooling sleeves (111), and the several liquid cooling sleeves (111) are fixedly connected in sequence, and the several liquid cooling sleeves (111) are fitted on the outer surface of the fuse body (2).

3. A fuse according to claim 2, characterized in that, The outer surface of the liquid cooling jacket (111) is provided with a liquid inlet (1111) and a liquid outlet (1112), which are located at the corners of the outer surface of the liquid cooling jacket (111).

4. A fuse according to claim 3, characterized in that, The liquid cooling jacket (111) includes a first arc-shaped liquid cooling plate (1114) and a second arc-shaped liquid cooling plate (1115). The first arc-shaped liquid cooling plate (1114) and the second arc-shaped liquid cooling plate (1115) are connected to form an arc-shaped sleeve with a flow channel (1113). The liquid inlet (1111) and the liquid outlet (1112) are respectively located at the corners of the outer surface of the second arc-shaped liquid cooling plate (1115).

5. A fuse according to claim 4, characterized in that, The projection of the flow channel (1113) is Z-shaped.

6. A fuse according to any one of claims 1-5, characterized in that, The fuse body (2) includes a fuse tube (23), and a fixing block (22) is provided at both ends of the fuse tube (23), and a fixing hole (21) is provided on the fixing block (22).

7. A fuse according to claim 6, characterized in that, The fuse tube (23) is a cylinder.

8. A fuse according to claim 2, characterized in that, The fuse also includes a fastening device (3) that connects two opposing liquid cooling jackets (111).

9. A fuse according to claim 8, characterized in that, The fastening device (3) includes a bolt (31) and a nut (32), the bolt (31) being threaded through two opposing liquid cooling sleeves (111) and connected to the nut (32).

10. A battery pack, characterized in that, It includes a battery box, battery cells, and a fuse as described in any one of claims 1-9, wherein the battery cells and the fuse are installed in the battery box and are electrically connected.

Images