Battery housing with lid sealing mechanism

Abstract

The utility model discloses a battery case with lid body sealing mechanism, including battery bottom shell, install the cover plate in battery bottom shell top, battery bottom shell top is fixedly connected with annular sealing ring, the bottom of cover plate is equipped with the clamping groove for accommodating sealing ring, sealing ring inside has a cavity, be provided with the gas pressure adjusting assembly for the gas transmission to the cavity inside on battery bottom shell, when the cover plate is installed in the top of battery bottom shell, make sealing ring be in natural state, the volume of sealing ring is less than the inside space of clamping groove at this time, can therefore smoothly with sealing ring clamping into the inside of clamping groove, then through gas pressure adjusting assembly, the gas is transported to the cavity inside of sealing ring, make sealing ring gradually expand, fill up the gap between clamping groove, thereby improve the sealing degree between cover plate and battery bottom shell, prevent dust, water mark from entering battery bottom shell inside, guarantee the normal use of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery casing technology, specifically a battery casing with a cover sealing mechanism. Background Technology

[0002] The battery casing is mainly composed of a "bottom shell + cover plate" structure. The bottom shell, as the "lower main body" of the battery, has the core function of housing the cells and electrolyte, and providing physical protection against impact and compression. Its design must prioritize "structural strength" and "internal space adaptability". The cover plate, as the "upper sealing component" of the battery, has the core function of sealing the bottom shell opening and integrating key functional components. Its design must find a balance between "sealing and leak prevention" and "functional extension" (such as wiring, venting, and maintenance).

[0003] A density ring is usually required to seal between the bottom shell and the cover plate. The size and weight of the large-volume sealing ring make it difficult to maintain a stable shape during assembly, naturally resulting in problems of "difficult alignment and difficult insertion into the groove". When this deformed sealing ring is connected to the groove, it is easy to "partially exceed the groove range" (such as the deformed edge getting stuck outside the groove) or "partially not enter the groove" (such as the folds being suspended above the groove), making it impossible to insert the whole ring accurately. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a battery casing with a cover sealing mechanism, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a battery casing with a cover sealing mechanism, comprising a battery bottom casing and a cover plate installed on the top of the battery bottom casing, wherein an annular sealing ring is fixedly connected to the top of the battery bottom casing, and a slot for accommodating the sealing ring is provided at the bottom of the cover plate, wherein the sealing ring has a cavity inside, and a pressure regulating component for supplying air into the cavity is provided on the battery bottom casing.

[0008] Preferably, the air pressure regulating component includes an air supply pipe that communicates with the cavity, and a sleeve is fixedly connected to the other end of the air supply pipe. A sealing push block that can be displaced along the axis of the sleeve is provided inside the sleeve, and the sealing push block slides in contact with the inner wall of the sleeve.

[0009] Preferably, a screw is fixedly connected to one end of the sealing push block, a knob is fixedly connected to the end of the screw away from the sealing push block, a support is fixedly connected to the side wall of the battery bottom shell, and the screw is threaded into the support.

[0010] Preferably, the sleeve is provided with scale markings, and the sleeve is made of transparent material.

[0011] Preferably, the cross-section of the sealing ring and the cross-section of the groove are both isosceles trapezoids.

[0012] Preferably, the cover plate has a plurality of annular through holes I and a plurality of annular through holes II, and the positions of the through holes I and through holes II correspond one to one.

[0013] (III) Beneficial Effects

[0014] This utility model provides a battery casing with a cover sealing mechanism, which has the following advantages:

[0015] 1. In this utility model, when the cover plate is installed on the top of the battery bottom shell, the sealing ring is in its natural state. At this time, the volume of the sealing ring is smaller than the internal space of the slot, so the sealing ring can be smoothly inserted into the slot. Then, through the air pressure regulating component, gas is supplied into the cavity of the sealing ring, causing the sealing ring to gradually expand and fill the gap between it and the slot, thereby improving the sealing degree between the cover plate and the battery bottom shell, preventing dust and water stains from entering the battery bottom shell, and ensuring the normal use of the battery module.

[0016] 2. In this utility model, by rotating the knob, the screw and the sealing push block are driven to rotate, and the sealing push block is driven to move in a rotating manner, thereby pushing the gas inside the sleeve into the cavity of the sealing ring, that is, increasing the saturation of the sealing ring, so that the sealing ring and the inner wall of the slot can fully abut against each other, thereby improving the sealing performance between the battery bottom shell and the cover plate. Attached Figure Description

[0017] Figure 1 This is a front perspective three-dimensional structural view of a battery casing with a cover sealing mechanism proposed in this utility model;

[0018] Figure 2 for Figure 1 A structural diagram of the cover plate in its disassembled state;

[0019] Figure 3 for Figure 1 Cross-sectional structural diagram;

[0020] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0021] Figure 5 This is a bottom view of a battery casing with a cover sealing mechanism proposed in this utility model.

[0022] Figure 6 for Figure 2 A diagram of the structure viewed from below;

[0023] Figure 7 This is a partial structural diagram of a battery casing with a cover sealing mechanism proposed in this utility model.

[0024] In the diagram: 1. Battery bottom shell; 2. Cover plate; 201. Slot; 3. Sealing ring; 301. Cavity; 4. Gas pipe; 5. Pipe sleeve; 6. Sealing push block; 7. Screw; 8. Knob; 9. Support; 10. Scale mark; 11. Through hole one; 12. Through hole two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figures 1 to 4 This utility model provides a technical solution: a battery casing with a cover sealing mechanism, including a battery bottom shell 1 and a cover plate 2 installed on the top of the battery bottom shell 1. An annular sealing ring 3 is fixedly connected to the top of the battery bottom shell 1. A slot 201 for accommodating the sealing ring 3 is opened at the bottom of the cover plate 2. The sealing ring 3 has a cavity 301 inside. A pressure regulating component for supplying air into the cavity 301 is provided on the battery bottom shell 1.

[0027] When the cover plate 2 is installed on top of the battery bottom shell 1, the sealing ring 3 is in a naturally relaxed state. That is, the volume of the sealing ring 3 is smaller than the internal space of the slot 201. Therefore, the sealing ring 3 can be smoothly inserted into the slot 201. Then, gas is supplied into the cavity 301 of the sealing ring 3 through the air pressure regulating component, causing the sealing ring 3 to gradually expand and fill the gap between it and the slot 201. This improves the sealing degree between the cover plate 2 and the battery bottom shell 1, prevents dust and water stains from entering the battery bottom shell 1, and ensures the normal use of the battery module.

[0028] See Figures 5 to 7 The air pressure regulating component includes an air supply pipe 4 connected to the cavity 301. The other end of the air supply pipe 4 is fixedly connected to a sleeve 5. A sealing push block 6 that can be displaced along the axis of the sleeve 5 is provided inside the sleeve 5. The sealing push block 6 slides in contact with the inner wall of the sleeve 5. The sleeve 5 and the air supply pipe 4 are both fixedly connected to the bottom shell 1 of the battery.

[0029] See Figures 5 to 7One end of the sealing push block 6 is fixedly connected to a screw 7, and the other end of the screw 7 away from the sealing push block 6 is fixedly connected to a knob 8. A support 9 is fixedly connected to the side wall of the battery bottom shell 1. The screw 7 is threaded into the support 9, and the support 9 has an internal thread that is compatible with the screw 7.

[0030] By rotating the knob 8, the screw 7 and the sealing push block 6 are driven to rotate, and the sealing push block 6 is driven to rotate inside the sleeve 5, thereby pushing the gas inside the sleeve 5 into the cavity 301 of the sealing ring 3, causing the sealing ring 3 to "elastically expand" - the outer diameter of the expanded sealing ring 3 increases, and it tightly abuts against the inner wall of the slot 201, that is, it increases the saturation of the sealing ring 3, forming an "interference fit", completely eliminating the gap between the battery bottom shell 1 and the cover plate 2, and achieving high sealing performance.

[0031] It should be noted that the sealing pusher 6 has a disc-shaped structure, so it can rotate inside the sleeve 5.

[0032] See Figures 5 to 7 The sleeve 5 is marked with graduation marks 10 and is made of transparent material.

[0033] The transparent material of the sleeve 5 allows operators to directly observe the movement of the sealing pusher 6 inside the sleeve 5 and the flow of gas within the sleeve 5, so as to promptly detect any bubbles, blockages or other abnormalities and ensure the normal operation of the entire sealing system.

[0034] The scale mark 10 can accurately display the moving distance of the sealing pusher 6, thereby accurately controlling the amount of gas pushed into the cavity 301 of the sealing ring 3, and thus accurately controlling the saturation of the sealing ring 3, so that it can fully contact the inner wall of the slot 201 and achieve a good sealing effect.

[0035] See Figures 5 to 7 The cross-sections of the sealing ring 3 and the groove 201 are both isosceles trapezoids.

[0036] The isosceles trapezoid's "narrow upper base and wide lower base" characteristics are precisely matched with the slot 201's "narrow upper opening and wide lower slot bottom";

[0037] When the sealing ring 3 is inflated or the cover plate 2 is pressed down, the trapezoidal slope of the sealing ring 3 will form a "surface contact bidirectional extrusion" with the trapezoidal slope of the slot 201. The two slopes of the slot 201 will exert an "inward constraint pressure" on the sealing ring 3, while the expansion of the sealing ring 3 will exert an "outward support pressure" on the slope of the slot 201. This bidirectional pressure can make the contact pressure between the sealing ring 3 and the slot 201 evenly distributed along the slope.

[0038] See Figures 1 to 4The cover plate 2 has multiple annular through holes 11 and multiple annular through holes 12, with the positions of the through holes 11 and through holes 12 corresponding one-to-one.

[0039] Fasteners (such as a combination of bolts and nuts) are installed inside through holes 11 and 12 to connect the cover plate 2 and the battery bottom shell 1, so that the cover plate 2 and the battery bottom shell 1 form a stable whole.

[0040] The ring-shaped fasteners (arranged in a ring along the edge of the cover plate 2) can evenly distribute the "connection pressure" between the cover plate 2 and the battery bottom shell 1 to the entire sealing surface. The tightening torque of each fastener is transmitted to the sealing surface through the ring layout, ensuring that the compression of each area of ​​the sealing ring 3 is relatively consistent.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery casing with a cover sealing mechanism, characterized in that: The battery includes a battery base (1) and a cover plate (2) installed on the top of the battery base (1). A ring-shaped sealing ring (3) is fixedly connected to the top of the battery base (1). A slot (201) for accommodating the sealing ring (3) is provided at the bottom of the cover plate (2). The sealing ring (3) has a cavity (301) inside. A pressure regulating component for supplying air into the cavity (301) is provided on the battery base (1).

2. A battery casing with a cover sealing mechanism according to claim 1, characterized in that: The air pressure regulating component includes an air supply pipe (4) connected to the cavity (301), and a sleeve (5) is fixedly connected to the other end of the air supply pipe (4). A sealing push block (6) that can be displaced along the axis of the sleeve (5) is provided inside the sleeve (5), and the sealing push block (6) slides in contact with the inner wall of the sleeve (5).

3. A battery casing with a cover sealing mechanism according to claim 2, characterized in that: One end of the sealing push block (6) is fixedly connected to a screw (7), and the end of the screw (7) away from the sealing push block (6) is fixedly connected to a knob (8). A support (9) is fixedly connected to the side wall of the battery bottom shell (1), and the screw (7) is threaded into the support (9).

4. A battery casing with a cover sealing mechanism according to claim 3, characterized in that: The sleeve (5) is provided with scale markings (10), and the sleeve (5) is made of transparent material.

5. A battery casing with a cover sealing mechanism according to claim 1, characterized in that: The cross-section of the sealing ring (3) and the cross-section of the groove (201) are both isosceles trapezoids.

6. A battery casing with a cover sealing mechanism according to claim 1, characterized in that: The cover plate (2) has a plurality of annular through holes (11) and a plurality of annular through holes (12), the positions of the through holes (11) and the through holes (12) are in one-to-one correspondence.

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