Battery bonding structure

Abstract

The utility model relates to a kind of battery bonding structure, it includes: the first 1 convex part, from the bottom surface of secondary battery downwards protrude;The second convex part, from the opposite surface of the shell that houses the secondary battery with the bottom surface upwards protrude, in horizontal direction between the first 1 convex part;And heat conduction adhesive, set between the bottom surface and the opposite surface.According to the utility model, the battery bonding structure with good thermal conductivity and adhesion can be realized.

Description

Technical Field

[0001] This utility model relates to a battery bonding structure. Background Technology

[0002] Japanese Patent Application Publication No. 2018-147607 discloses a heat transfer device for a battery pack in which a metal heat-conducting component is disposed on the lower surface of a battery pack consisting of multiple individual cells arranged in a row. In this technology, since the cooling heat or heating heat from the metal heat transfer unit is transferred to the battery pack through the metal heat-conducting component, all individual cells can be cooled or heated efficiently.

[0003] In the technology disclosed in Japanese Patent Application Publication No. 2018-147607, because the metal heat conduction component is a corrugated plate, the contact area between the lower surface of the battery pack and the metal heat conduction component is small, resulting in poor thermal conductivity. Furthermore, the small contact area between the lower surface of the battery pack and the metal heat conduction component, as well as the small contact area between the metal heat conduction component and the metal heat transfer device, leads to poor adhesion. Utility Model Content

[0004] This utility model was made in view of the above circumstances, and its purpose is to provide a battery bonding structure with good thermal conductivity and adhesion.

[0005] The battery bonding structure of this utility model includes: a first protrusion protruding downward from the bottom surface of the secondary battery; a second protrusion protruding upward from the opposite surface of the housing containing the secondary battery, which is opposite to the bottom surface, and located horizontally between the first protrusions; and a thermally conductive adhesive disposed between the bottom surface and the opposite surface.

[0006] According to this invention, a battery bonding structure with good thermal conductivity and adhesion can be achieved. Attached Figure Description

[0007] Figure 1 This is a diagram showing a cross-section of the battery bonding structure.

[0008] Figure 2 This is a diagram showing the bottom surface of a secondary battery and the opposite sides of its casing.

[0009] Figure 3 This is a diagram showing the bottom surface of a secondary battery and the opposite sides of its casing. Detailed Implementation

[0010] The battery bonding structure of an embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, the constituent elements in the following embodiments include elements that can be easily substituted by those skilled in the art or are substantially the same.

[0011] Figure 1 This is a cross-sectional view showing the battery bonding structure. (See diagram below.) Figure 1 As shown, the battery bonding structure 1 uses a thermally conductive adhesive 4 to bond the secondary battery 2 to the casing 3.

[0012] The secondary battery 2 is a secondary battery such as a lithium-ion battery. The secondary battery 2 is a battery cell or a battery stack formed by stacking battery cells. On the bottom surface 2a of the secondary battery 2, a first protrusion 2b is formed that protrudes downward from the bottom surface 2a of the secondary battery 2.

[0013] The housing 3 houses the secondary battery 2. A second protrusion 3b is formed on the opposite surface 3a, which is opposite to the bottom surface 2a of the secondary battery 2, protruding upward from the opposite surface 3a of the housing 3.

[0014] Thermally conductive adhesive 4 is disposed between the bottom surface 2a of the secondary battery 2 and the opposite surface 3a of the casing 3.

[0015] Figure 2 This is a diagram showing the bottom surface of a secondary battery and the opposite sides of its casing. For example... Figure 1 and Figure 2 As shown, the first protrusion 2b and the second protrusion 3b are cylindrical in shape, with their diameters tapering towards the top. The lengths of the first protrusion 2b and the second protrusion 3b are preferably lengths that will not interfere with each other due to dynamic displacement input from the vehicle.

[0016] Furthermore, the second protrusion 3b is located between the first protrusion 2b in the horizontal direction. The first protrusion 2b and the second protrusion 3b can be arranged in a houndstooth pattern, which is staggered in two dimensions in the horizontal direction. However, there are no particular limitations on the arrangement of the first protrusion 2b and the second protrusion 3b, as long as they do not interfere with each other.

[0017] According to the battery bonding structure 1, by forming the first protrusion 2b and the second protrusion 3b, the contact area between the bottom surface 2a of the secondary battery 2 and the thermally conductive adhesive 4, as well as the contact area between the thermally conductive adhesive 4 and the opposing surface 3a of the casing 3, is increased. As a result, the thermal conductivity of the secondary battery 2 is improved, and the adhesion between the secondary battery 2 and the casing 3 is also improved. By improving the adhesion, even with years of degradation and displacement from the vehicle, the secondary battery 2 is less likely to detach from the casing 3.

[0018] Next, the variations will be explained.

[0019] Figure 3 This is a diagram showing the bottom surface of a secondary battery and the opposite sides of its casing. For example... Figure 3 As shown, the first protrusion 2Ab and the second protrusion 3Ab are formed into an elliptical cylindrical shape with a diameter that tapers towards the top. Similar to the embodiment, a first protrusion 2Ab protruding downwards from the bottom surface 2Aa is formed on the bottom surface 2Aa. A second protrusion 3Ab protruding upwards from the opposite surface 3Aa is formed on the opposite surface 3Aa.

[0020] As shown in the modified example, the cross-sectional shapes of the first and second protrusions are not limited to circles, but can also be elliptical. Furthermore, the first and second protrusions are not limited to cylinders and cones, but can also be prisms, etc. Moreover, the first and second protrusions can also be scraper-shaped, plate-shaped, or have concave-convex shapes, as long as they have a shape that increases the contact area between the bottom surface of the secondary battery and the thermally conductive adhesive, and the contact area between the thermally conductive adhesive and the opposing surface of the casing.

[0021] Furthermore, although the embodiment describes an example of bonding the secondary battery 2 to the housing 3, it is not limited to this. The secondary battery 2 may also be directly bonded to a cooler for cooling the secondary battery 2. In this case, a second protrusion may be formed on the opposite surface of the cooler that is opposite to the bottom surface 2a of the secondary battery 2.

[0022] Further effects and variations can be readily derived by those skilled in the art. Therefore, the broader aspects of this invention are not limited to the specific details and representative embodiments shown and described above. Thus, various modifications can be made without departing from the general concept of this invention as defined by the technical solution and its equivalents.

Claims

1. A battery bonding structure, characterized in that, include: The first protrusion protrudes downward from the bottom of the secondary battery; The second protrusion protrudes upward from the opposite surface of the housing containing the secondary battery, which is opposite to the bottom surface, and is located horizontally between the first protrusions; and A thermally conductive adhesive is disposed between the bottom surface and the opposite surface.

Images