Waterproof structure of lithium battery pack

Abstract

The utility model discloses a waterproof structure of a lithium battery pack, and relates to the technical field of lithium batteries. A waterproof structure of a lithium battery pack comprises an outer box body, a detachable outer cover plate is connected to the top end of the outer box body, an inner box body is fixedly connected in the outer box body, a detachable inner cover plate is connected to the top end of the inner box body, and sealing assemblies for sealing from inside to outside are arranged on the outer cover plate and the inner cover plate. The lithium battery is placed in the inner box body, the waterproof performance can be improved through the double-layer box body structure, when the outer cover plate is closed, the first sealing strip and the second sealing strip slide outwards and can be tightly attached to the front side, the rear side, the left side and the right side in the outer cover plate, then the connecting position of the outer box body and the outer cover plate is sealed from the inner side, and external water vapor is prevented from entering; and the influence of the external environment on the sealing strip can be reduced by sealing from the inner side, so that the long-term reliable sealing performance can be maintained, and the inner box body can be cooled when water circulates in the cooling pipe, so that the lithium battery in the inner box body is cooled.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field especially relates to a lithium battery Pack waterproof structure. BACKGROUND

[0002] With the wide application of portable electronic devices, electric vehicles and energy storage systems, the performance and reliability of lithium battery Pack (battery pack) as the key energy storage unit have attracted more and more attention. In these application environments, lithium battery Pack needs to face various adverse conditions, including moisture and water erosion. The infiltration of water vapor or liquid water may not only cause internal circuit short circuit of the battery, but also may cause chemical corrosion, thereby seriously affecting the service life and safety of the battery.

[0003] Traditional lithium battery Pack usually adopts mechanical sealing method to realize waterproof function, for example, using rubber sealing ring, adhesive tape or other forms of sealing material. However, this kind of method is generally sealed from the outside, and the sealing material may be aged or deformed over time, resulting in the decline of sealing effect; secondly, in actual operation, if the pressure applied during the closing process is uneven or improperly installed, it may also affect the sealing quality; furthermore, once the pressure in the battery Pack changes (such as expansion caused by temperature rise), the original sealing structure may not maintain effective sealing state, thereby causing the risk of water vapor infiltration.

[0004] In order to overcome the above problems, we propose a lithium battery Pack waterproof structure, which can automatically seal from the inside after closing the cover to prevent external water vapor from infiltrating, so as to maintain long-term reliable sealing performance. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the shortcomings that the sealing from the outside to the inside is easy to be affected by the outside, resulting in the aging and deformation of the sealing structure, and the internal pressure change also affects the sealing effect, the utility model provides a lithium battery Pack waterproof structure, which can automatically seal from the inside after closing the cover to prevent external water vapor from infiltrating, so as to maintain long-term reliable sealing performance.

[0006] Technical scheme: a lithium battery Pack waterproof structure, comprising an outer box body, the outer box body top end is connected with the detachable outer cover plate, the outer box body is fixedly connected with the inner box body in, the inner box body top end is connected with the detachable inner cover plate, the outer cover plate and the inner cover plate are equipped with the sealing assembly for sealing from the inside to the outside, the outer box body is equipped with the cooling assembly for cooling the lithium battery.

[0007] Furthermore, it is particularly preferred that the sealing assembly comprises two laterally symmetrical guide blocks fixedly connected to the bottom end of the outer cover plate, a sliding rod slidingly connected in the guide blocks, a first spring connected between the sliding rod and the adjacent guide block, a first sealing strip fixedly connected to the end of the two laterally symmetrical sliding rods away from each other, a connecting plate fixedly connected to the longitudinal ends of the first sealing strip, and an extrusion plate fixedly connected to the connecting plate.

[0008] Furthermore, it is particularly preferred that the second sealing strip is provided with a stepped protrusion at the longitudinal ends thereof, and the side of the extrusion plate in contact with the second sealing strip is inclined.

[0009] Furthermore, it is particularly preferred that the extrusion block is wedge-shaped at the longitudinal ends thereof, and the extrusion block is in extrusion fit with the sliding rod.

[0010] Furthermore, it is particularly preferred that the cooling assembly comprises a water inlet connector fixedly connected to the outer box body, and a cooling pipe fixedly connected to the inner box body and in communication with the water inlet connector.

[0011] Furthermore, it is particularly preferred that the cooling pipe is coiled on the inner box body.

[0012] Beneficial effects: The lithium battery is placed in the inner box body, and the double-layer box body structure can improve the waterproof performance; when the outer cover plate is closed, the first sealing strip and the second sealing strip slide outward to tightly contact the four sides of the inner side of the outer cover plate, thereby sealing the connection between the outer box body and the outer cover plate from the inside, preventing external water vapor from entering, and the inside sealing can reduce the influence of the external environment on the sealing strip, thereby maintaining long-term reliable sealing performance; and the water circulating in the cooling pipe can cool the inner box body, thereby cooling the lithium battery in the inner box body. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0014] Figure 2 It is a three-dimensional structure schematic view of the outer box body, the outer cover plate, the inner box body and the inner cover plate of the utility model.

[0015] Figure 3 It is a three-dimensional structure schematic view of the sliding rod, the first sealing strip and the extrusion block of the utility model.

[0016] Figure 4 It is a three-dimensional structure schematic view of the connecting plate, the extrusion plate and the second sealing strip of the utility model.

[0017] Figure 5The utility model discloses a three-dimensional structure schematic diagram of water inlet joint, cooling pipe, outer box body and inner box body.

[0018] Among them, the above-mentioned drawing includes the following sign: 1, outer box body, 2, outer cover, 3, inner box body, 4, inner cover, 5, guide block, 6, sliding rod, 7, first spring, 8, first sealing strip, 9, connecting plate, 10, extrusion plate, 11, second sealing strip, 111, second spring, 12, extrusion block, 13, water inlet joint, 14, cooling pipe. DETAILED DESCRIPTION

[0019] In order to make the utility model's purpose, technical scheme and advantage more clear and obvious, below, combining with specific implementation and referring to attached drawing, the utility model is further detailedly explained.It should be understood that these descriptions are only exemplary, and not to limit the scope of the utility model.In addition, in the following description, the description of known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0020] Embodiment 1: a lithium battery Pack waterproof structure, as Figures 1-5 Shown, including outer box body 1, outer cover 2, inner box body 3, inner cover 4, sealing assembly and cooling assembly, outer box body 1 upper side is connected with detachable outer cover 2, and outer box body 1 is fixedly connected with inner box body 3, and inner box body 3 upper side is connected with detachable inner cover 4, and outer cover 2 and inner cover 4 are equipped with sealing assembly for sealing from inside to outside, and outer box body 1 is equipped with cooling assembly for cooling lithium battery.

[0021] When using the device, the staff opens outer cover 2 and inner cover 4, then assembles lithium battery into inner box body 3, then closes inner cover 4, and then closes outer cover 2, and the double-layer box body structure can improve waterproof performance, and when outer cover 2 is closed, the sealing assembly can avoid between outer cover 2 and outer box body 1 from inside, prevent external moisture from entering, and in the process of using the device, the cooling assembly further cools the inside of outer box body 1, thereby cooling lithium battery.

[0022] Embodiment 2: on the basis of embodiment 1, as Figure 1 、 Figure 3 and Figure 4As shown, the sealing assembly includes guide blocks 5, sliding rods 6, first springs 7, first sealing strips 8, connecting plates 9, extrusion plates 10, second sealing strips 11, second springs 111 and extrusion blocks 12, the left and right parts of the lower side of the outer cover plate 2 are fixedly connected with guide blocks 5, the guide blocks 5 are slidably connected with sliding rods 6, the sliding rods 6 are connected with the first springs 7 between the adjacent guide blocks 5, the left and right ends of the two sliding rods 6 away from each other are fixedly connected with first sealing strips 8, the front and rear parts of the first sealing strips 8 are fixedly connected with connecting plates 9, the extrusion plates 10 are fixedly connected on the connecting plates 9, the front and rear parts of the lower side of the outer cover plate 2 are slidably connected with second sealing strips 11, the left and right parts of the second sealing strips 11 are provided with stepped protrusions, the side of the extrusion plate 10 in contact with the second sealing strip 11 is provided in an inclined manner, the extrusion plate 10 is in extrusion fit with the second sealing strip 11, the second sealing strip 11 is connected with the second spring 111 between the outer cover plate 2, the middle part of the upper side of the inner cover plate 4 is fixedly connected with an extrusion block 12, the left and right ends of the extrusion block 12 are in a wedge shape, and the extrusion block 12 is in extrusion fit with the sliding rod 6.

[0023] In use of the device, when the outer cover plate 2 is moved downward to close, the sealing assembly except the extrusion block 12 is moved downward together, when the sliding rod 6 is moved downward to contact with the extrusion block 12, the sliding rod 6 continues to move downward and is extruded by the extrusion block 12 to slide backward, the first spring 7 is deformed, the sliding rod 6 slides backward to drive the first sealing strip 8 to move backward, the first sealing strip 8 moves backward to fit the left and right sides of the outer cover plate 2, and the first sealing strip 8 moves backward to drive the extrusion plate 10 to move backward through the connecting plate 9, the extrusion plate 10 moves backward to extrude the second sealing strip 11 on the left and right sides to slide backward, the second spring 111 is deformed, and the second sealing strip 11 slides backward to fit the front and rear sides of the outer cover plate 2, the first sealing strip 8 and the second sealing strip 11 seal the connection between the outer box body 1 and the outer cover plate 2 from the inside, to prevent external water vapor from entering, and the sealing from the inside can reduce the influence of the external environment on the sealing strip, to maintain long-term reliable sealing performance, when the outer cover plate 2 is opened, the sliding rod 6 is separated from the extrusion block 12, at this time, the sliding rod 6 drives the first sealing strip 8, the connecting plate 9 and the extrusion plate 10 to move toward each other to reset under the action of the first spring 7, and the second sealing strip 11 also slides toward each other to reset under the action of the second spring 111.

[0024] As shown in Figure 1 and Figure 5 , the cooling assembly includes a water inlet joint 13 and a cooling pipe 14, the left side of the outer box body 1 is fixedly connected with the water inlet joint 13, the upper side of the inner box body 3 is fixedly connected with the cooling pipe 14, the two ends of the cooling pipe 14 are communicated with the water inlet joint 13, and the cooling pipe 14 is curved and coiled on the inner box body 3.

[0025] When using the device, the operator can connect an external pipe to the water inlet connector 13 and introduce water into the cooling pipe 14 through the water inlet connector 13. When the water flows in the cooling pipe 14, it can cool the inner box 3, thereby cooling the lithium battery inside the inner box 3. The water flowing in the cooling pipe 14 will eventually flow into the water inlet connector 13 and then be discharged from the water inlet connector 13.

[0026] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A waterproof structure for a lithium battery pack, characterized in that, It includes an outer casing (1), a detachable outer cover plate (2) connected to the top of the outer casing (1), an inner casing (3) fixedly connected inside the outer casing (1), a detachable inner cover plate (4) connected to the top of the inner casing (3), a sealing assembly for sealing from the inside out on the outer cover plate (2) and the inner cover plate (4), and a cooling assembly for cooling the lithium battery on the outer casing (1).

2. A waterproof lithium battery pack structure according to claim 1, characterized in that, The sealing assembly includes two transversely symmetrical guide blocks (5), which are fixedly connected to the bottom of the outer cover plate (2). A sliding rod (6) is slidably connected inside the guide block (5). A first spring (7) is connected between the sliding rod (6) and the adjacent guide block (5). A first sealing strip (8) is fixedly connected to the ends of the two transversely symmetrical sliding rods (6) that are far apart from each other. A connecting plate (9) is fixedly connected to both ends of the first sealing strip (8) in the longitudinal direction. A pressing plate (10) is fixedly connected to the connecting plate (9). A second sealing strip (11) is slidably connected to both ends of the bottom of the outer cover plate (2). A second spring (111) is connected between the second sealing strip (11) and the outer cover plate (2). A pressing block (12) is fixedly connected to the middle of the top of the inner cover plate (4).

3. A waterproof lithium battery pack structure according to claim 2, characterized in that, The second sealing strip (11) has stepped protrusions at both ends in the lateral direction. The side of the extrusion plate (10) that contacts the second sealing strip (11) is inclined. The extrusion plate (10) and the second sealing strip (11) are squeezed together.

4. A waterproof lithium battery pack structure according to claim 3, characterized in that, The extrusion block (12) has wedge-shaped ends on both sides, and the extrusion block (12) and the sliding rod (6) are in extrusion fit.

5. A waterproof lithium battery pack structure according to claim 4, characterized in that, The cooling assembly includes a water inlet connector (13), which is fixedly connected to the outer casing (1), and a cooling pipe (14) is fixedly connected to the inner casing (3). The two ends of the cooling pipe (14) are connected to the water inlet connector (13).

6. A waterproof lithium battery pack structure according to claim 5, characterized in that, The cooling pipe (14) is bent and coiled on the inner box (3).

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