Waterproof structure and battery pack

Abstract

The utility model relates to the technical field of battery pack waterproofing, and provides a waterproof structure and a battery pack, an upper cover is provided with a first avoiding hole and a second avoiding hole which take a first direction as a depth direction, the inner side of the upper cover is convexly provided with a rib along the first direction, and the rib is annular and is sleeved outside the first avoiding hole and the second avoiding hole; the sealing cover plate is fixed with the upper cover, and the circumferential direction of the sealing cover plate is welded and sealed with the ribs to form an isolation cavity; the release mechanism is arranged in the isolation cavity and comprises a pressing part and an execution part, the pressing part is slidably arranged in the first receding hole, the execution part is slidably arranged in the second receding hole, and the pressing part and the execution part are connected and can synchronously get away from or get close to the sealing cover plate; the PCB is located on the side, back to the release mechanism, of the sealing cover plate. The elastic piece is arranged in the isolation cavity, so that the release mechanism always has the movement tendency of being far away from the sealing cover plate in the axial direction of the first receding hole. Therefore, the battery pack has relatively good waterproofness.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack waterproofing, and particularly relates to a waterproof structure and a battery pack. Background Art

[0002] The lithium battery pack used on DC power tools. At present, most products do not have the waterproof function. There is basically no problem when such products are used indoors, but when used outdoors, especially on rainy days, rainwater will enter the inside of the battery pack, which will cause the internal electronic components or battery cores to short-circuit and fail, thus making the product lose its function.

[0003] The reason is that the existing battery pack includes electronic components such as an upper cover, a lower cover, a release mechanism, and a PCB board. Since the battery pack is fixed to other devices electrically connected thereto through the release mechanism, a through hole for the release mechanism to stretch is provided on the upper cover of the battery pack. Therefore, liquid can enter the inside of the battery pack from these through holes and directly contact the electronic components, causing a short circuit.

[0004] Therefore, there is an urgent need for a waterproof structure and a battery pack to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a waterproof structure that can reduce the contact between moisture or water vapor outside the battery pack and the electronic components inside the battery pack, and improve the waterproof performance of the battery pack.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A waterproof structure, characterized by comprising:

[0008] An upper cover, on which a first avoidance hole and a second avoidance hole are provided with the first direction as the depth direction. A rib is convexly provided on the inner side of the upper cover along the first direction. The rib is annular and sleeved outside the first avoidance hole and the second avoidance hole;

[0009] A sealing cover plate, which is fixed to the upper cover, and the circumference of the sealing cover plate is welded and sealed with the rib to form an isolation cavity;

[0010] A release mechanism, which is arranged in the isolation cavity. The release mechanism includes a pressing part and an execution part. The pressing part is slidably arranged in the first avoidance hole, the execution part is slidably arranged in the second avoidance hole, and the pressing part and the execution part are connected and can move away from or close to the sealing cover plate synchronously; The PCB board is located on the side of the sealing cover plate facing away from the release mechanism;

[0011] The elastic member is disposed in the isolation cavity, such that the release mechanism always has a tendency to move away from the sealing cover plate along the axial direction of the first avoidance hole.

[0012] As a preferred technical solution of the waterproof structure, the sealing cover plate abuts against the rib along the first direction, and the rib is attached to the sealing cover plate.

[0013] As a preferred technical solution of the waterproof structure, the pressing portion and the actuating portion are integrally formed.

[0014] As a preferred technical solution of the waterproof structure, the sealing cover plate is convexly provided with a limiting portion, and the abutting direction of the limiting portion against the rib is perpendicular to the first direction.

[0015] As a preferred technical solution of the waterproof structure, it further includes a display assembly. The display assembly includes a display panel. The display panel is installed on the upper cover. The PCB board is provided with a light-emitting unit. The sealing cover plate is installed with a light-transmitting member. The light-emitting unit projects light to the display panel through the light-transmitting member.

[0016] As a preferred technical solution of the waterproof structure, the sealing cover plate is further provided with a through hole. The light-transmitting member is inserted into the through hole, and the light-transmitting member and the peripheral side wall of the through hole are sealed by injecting glue.

[0017] As a preferred technical solution of the waterproof structure, the sealing cover plate and the light-transmitting member are integrally formed.

[0018] As a preferred technical solution of the waterproof structure, the display assembly further includes a switch button. The upper cover is provided with a third avoidance hole. The sealing cover plate is provided with a fourth avoidance hole. The fourth avoidance hole is sealed with a first flexible member. One end of the switch button is disposed in the third avoidance hole. The bottom of the switch button abuts against the switch unit of the PCB board through the first flexible member. The switch unit is used to control the display or extinguishing of the light-emitting unit.

[0019] As a preferred technical solution of the waterproof structure, one of the pressing portion and the sealing cover plate is provided with a plugging post, and the other is provided with a plugging groove. The elastic member is a spring, one end of which is sleeved on the plugging post, and the other end is inserted into the plugging groove.

[0020] A battery pack is further provided, which includes a lower cover, the above-mentioned waterproof structure and the above-mentioned PCB board. The upper cover and the lower cover are fixed and the peripheral side is sealed by injecting glue.

[0021] Advantages of the present utility model:

[0022] The present utility model provides a waterproof structure and a battery pack. The waterproof structure includes an upper cover, a sealing cover plate, a release mechanism and an elastic member. Among them, the upper cover is provided with a first avoidance hole and a second avoidance hole with the first direction as the depth direction. Along the first direction, a rib is convexly provided on the inner side of the upper cover. The rib is annular and sleeved outside the first avoidance hole and the second avoidance hole. The sealing cover plate is fixed to the upper cover, and the circumference of the sealing cover plate is welded and sealed with the rib to form an isolation cavity. The release mechanism is arranged in the isolation cavity. The release mechanism includes a pressing part and an execution part. The pressing part is slidably arranged in the first avoidance hole, and the execution part is slidably arranged in the second avoidance hole. The pressing part and the execution part are connected and can move away from or close to the sealing cover plate synchronously. The PCB board is located on the side of the sealing cover plate facing away from the release mechanism. The elastic member is arranged in the isolation cavity, so that the release mechanism always has a movement tendency to move away from the sealing cover plate along the axial direction of the first avoidance hole.

[0023] Specifically, the execution part of the release mechanism is used for plugging other devices electrically connected to the battery pack, and the pressing part is used to control the length of the execution part extending out of the second avoidance hole. The sealing cover plate and the upper cover form an isolation cavity. The circumferential end face of the sealing cover plate is welded to the rib of the upper cover to realize the sealing of the isolation cavity. The first avoidance hole and the second avoidance hole of the upper cover are located at the top of the isolation cavity. That is, the sealing cover plate isolates the area of the upper cover with the through hole from the PCB board, avoiding external water vapor from entering the battery pack through the opening and contacting electronic components such as the PCB board, resulting in its short-circuit failure. Further, the elastic member makes the pressing part always move away from the sealing cover plate along the axial direction of the first avoidance hole. That is, the pressing part is always inserted into the first avoidance hole. Also, since the pressing part and the execution part always move away from or close to the sealing cover plate synchronously, the execution part also always keeps the state of extending out of the second avoidance hole. Thus, the pressing part and the execution part are always located in the first avoidance hole and the second avoidance hole, which can play a certain plugging role, making it difficult for external liquid or water vapor to enter from the first avoidance hole and the second avoidance hole.

[0024] The battery pack includes a lower cover, a waterproof structure and a PCB board. The upper cover is fixed to the lower cover and the periphery is sealed by injecting glue. In this way, the waterproof performance of the battery pack is improved. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0026] Figure 1 It is the front view of the waterproof structure provided by the embodiment of the present utility model;

[0027] Figure 2 is Figure 1 The sectional view taken along A-A in the figure;

[0028] Figure 3 is the front view of the upper cover provided by the embodiment of the present utility model;

[0029] Figure 4 is the rear view of the upper cover provided by the embodiment of the present utility model;

[0030] Figure 5 is the side view of the release mechanism provided by the embodiment of the present utility model;

[0031] Figure 6 is the front view of the sealing cover plate provided by the embodiment of the present utility model.

[0032] In the figure:

[0033] X, the first direction;

[0034] 10, upper cover; 11, first avoidance hole; 12, second avoidance hole; 13, rib; 14, third avoidance hole;

[0035] 20, sealing cover plate; 21, isolation cavity; 22, limiting part; 23, light-transmitting member; 24, through hole; 25, fourth avoidance hole; 26, insertion slot;

[0036] 30, release mechanism; 31, pressing part; 32, execution part; 33, insertion post;

[0037] 40, elastic member;

[0038] 51, display panel; 52, switch button;

[0039] 60, PCB board. Detailed implementation manners

[0040] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that only parts related to the present utility model rather than all structures are shown in the drawings for the convenience of description.

[0041] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0043] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] As Figures 1 to 6 shown, the present utility model provides a waterproof structure, which includes an upper cover 10, a sealing cover plate 20, a release mechanism 30 and an elastic member 40. Among them, the upper cover 10 is provided with a first avoidance hole 11 and a second avoidance hole 12 with the first direction X as the depth direction. On the inner side of the upper cover 10, there is a rib 13 protruding along the first direction X. The rib 13 is annular and sleeved outside the first avoidance hole 11 and the second avoidance hole 12; the sealing cover plate 20 is fixed to the upper cover 10, and the circumference of the sealing cover plate 20 is welded and sealed with the rib 13 to form an isolation cavity 21; the release mechanism 30 is arranged in the isolation cavity 21. The release mechanism 30 includes a pressing part 31 and an executing part 32. The pressing part 31 is slidably arranged in the first avoidance hole 11, and the executing part 32 is slidably arranged in the second avoidance hole 12. The pressing part 31 and the executing part 32 are connected and can move away from or close to the sealing cover plate 20 synchronously; the PCB board 60 is located on the side of the sealing cover plate 20 facing away from the release mechanism 30; the elastic member 40 is arranged in the isolation cavity 21, so that the release mechanism 30 always has a tendency to move away from the sealing cover plate 20 along the axial direction of the first avoidance hole 11.

[0045] Specifically, the actuator 32 of the release mechanism 30 is for plugging with other devices electrically connected to this battery pack, and the pressing part 31 is for controlling the length of the actuator 32 extending out of the second avoidance hole 12; the sealing cover plate 20 and the upper cover 10 form an isolation cavity 21. The circumferential end face of the sealing cover plate 20 is welded to the rib 13 of the upper cover 10 to realize the sealing of the isolation cavity 21. The first avoidance hole 11 and the second avoidance hole 12 of the upper cover 10 are located at the top of the isolation cavity 21. That is, the sealing cover plate 20 isolates the area of the upper cover 10 with through holes from the PCB board 60, preventing external water vapor from entering the battery pack through the openings and contacting electronic components such as the PCB board 60, resulting in its short - circuit failure. Further, the elastic member 40 makes the pressing part 31 always move away from the sealing cover plate 20 along the axis of the first avoidance hole 11. That is, the pressing part 31 is always inserted into the first avoidance hole 11. Also, since the pressing part 31 and the actuator 32 always move away from or close to the sealing cover plate 20 synchronously, the actuator 32 also always maintains the state of extending out of the second avoidance hole 12. Thus, the pressing part 31 and the actuator 32 are always located in the first avoidance hole 11 and the second avoidance hole 12, which can play a certain plugging role, making it difficult for external liquid or water vapor to enter from the first avoidance hole 11 and the second avoidance hole 12.

[0046] Preferably, the sealing cover plate 20 and the upper cover 10 are welded by laser welding or ultrasonic welding.

[0047] Optionally, the sealing cover plate 20 abuts against the rib 13 along the first direction X, and the rib 13 fits against the sealing cover plate 20. Further, the width of the mating surface on the sealing cover plate 20 is not less than the width of the mating surface on the rib 13.

[0048] Optionally, the pressing part 31 and the actuator 32 are integrally formed.

[0049] In this way, the pressing part 31 and the actuator 32 are integrally formed, which can simplify the mechanical structure of the release mechanism 30 and maintain the action consistency between the pressing part 31 and the actuator 32.

[0050] Optionally, the sealing cover plate 20 protrudes with a limiting part 22, and the abutting direction of the limiting part 22 against the rib 13 is perpendicular to the first direction X. In this way, the sealing cover plate 20 and the upper cover 10 are aligned through the limiting part 22, which can simplify the alignment work during assembly and improve the assembly efficiency.

[0051] Optionally, it further includes a display component. The display component includes a display panel 51. The display panel 51 is installed on the upper cover 10. The PCB board 60 is provided with a light - emitting unit. The sealing cover plate 20 is installed with a light - transmitting member 23. The light - emitting unit projects light to the display panel 51 through the light - transmitting member 23.

[0052] Optionally, the sealing cover plate 20 is also provided with a through hole 24, the light transmissive member 23 is inserted into the through hole 24, and the light transmissive member 23 and the peripheral side wall of the through hole 24 are sealed by injecting glue. In this way, it can be ensured that the light transmissive member 23 is always aligned with the light emitting unit, and the light transmissive member 23 can extend into the isolation cavity 21 through the through hole 24 to transmit the light of the light emitting unit to the display panel 51. In order to prevent water vapor from passing through the through hole 24 along the light transmissive member 23 and contacting other electronic component structures such as the PCB board 60, therefore, in this embodiment, the light transmissive member 23 and the sealing cover plate 20 are sealed by injecting glue.

[0053] In other embodiments, the sealing cover plate 20 and the light transmissive member 23 are integrally formed.

[0054] Optionally, the display assembly further includes a switch button 52. The upper cover 10 is provided with a third avoidance hole 14, the sealing cover plate is provided with a fourth avoidance hole 25, the fourth avoidance hole 25 is sealed with a first flexible member, one end of the switch button 52 is disposed in the third avoidance hole 14, and the bottom of the switch button 52 abuts against the switch unit of the PCB board 60 through the first flexible member. The switch unit is used to control the display or extinction of the light emitting unit.

[0055] Optionally, one of the pressing portion 31 and the sealing cover plate 20 is provided with a plugging post 33, and the other is provided with a plugging groove 26. The elastic member 40 is a spring, one end of which is sleeved on the plugging post 33, and the other end is inserted into the plugging groove 26.

[0056] Specifically, in this embodiment, the pressing portion 31 is provided with a plugging post 33, the sealing cover plate 20 is provided with a plugging groove 26, and the elastic member 40 can be limited by the plugging post 33 and the plugging groove 26 to reduce the crosstalk of the elastic member 40 in other directions except the first direction X.

[0057] A battery pack is also provided, which includes a lower cover, a waterproof structure and a PCB board 60. The upper cover 10 is fixed to the lower cover and the periphery is sealed by injecting glue.

[0058] In addition, the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Waterproof structure, characterized in that, include: An upper cover (10), the upper cover (10) being provided with a first avoidance hole (11) and a second avoidance hole (12) with a first direction (X) as a depth direction, a rib (13) being protrudingly provided on the inner side of the upper cover (10) along the first direction (X), the rib (13) being annular and sleeved outside the first avoidance hole (11) and the second avoidance hole (12); A sealing cover plate (20), wherein the sealing cover plate (20) is fixed to the upper cover (10), and the circumference of the sealing cover plate (20) is welded and sealed with the ribs (13) to form an isolation cavity (21); A release mechanism (30), the release mechanism (30) being arranged in the isolation cavity (21), the release mechanism (30) comprising a pressing portion (31) and an executing portion (32), the pressing portion (31) being slidably arranged in the first avoidance hole (11), the executing portion (32) being slidably arranged in the second avoidance hole (12), the pressing portion (31) and the executing portion (32) being connected and being able to synchronously move away from or approach the sealing cover plate (20); the PCB board (60) being located on a side of the sealing cover plate (20) facing away from the release mechanism (30); An elastic member (40) is arranged in the isolation cavity (21), so that the release mechanism (30) always has a tendency to move away from the sealing cover plate (20) along the axial direction of the first avoidance hole (11).

2. The waterproof structure according to claim 1, characterized in that: The sealing cover plate (20) abuts against the ribs (13) along the first direction (X), and the ribs (13) are fitted to the sealing cover plate (20).

3. The waterproof structure according to claim 1, characterized in that: The pressing portion (31) and the executing portion (32) are integrally formed.

4. The waterproof structure according to claim 1, characterized in that: The sealing cover plate (20) is convexly provided with a limiting portion (22), and the abutment direction between the limiting portion (22) and the rib (13) is perpendicular to the first direction (X).

5. The waterproof structure according to claim 1, characterized in that: The device also comprises a display assembly, wherein the display assembly comprises a display panel (51), the display panel (51) is mounted on the upper cover (10), the PCB board (60) is provided with a light-emitting unit, the sealing cover plate (20) is provided with a light-transmitting member (23), and the light-emitting unit projects light onto the display panel (51) through the light-transmitting member (23).

6. The waterproof structure according to claim 5, characterized in that: The sealing cover plate (20) is further provided with a through hole (24), the light-transmitting member (23) is inserted into the through hole (24), and the light-transmitting member (23) and the peripheral side wall of the through hole (24) are sealed by glue injection.

7. The waterproof structure according to claim 5, characterized in that: The sealing cover plate (20) and the light-transmitting member (23) are integrally formed.

8. The waterproof structure according to claim 5, characterized in that: The display assembly further comprises a switch button (52), the upper cover (10) is provided with a third avoidance hole (14), the sealing cover plate (20) is provided with a fourth avoidance hole (25), the fourth avoidance hole (25) is sealed with a first flexible member, one end of the switch button (52) is arranged in the third avoidance hole (14), the bottom of the switch button (52) is in contact with a switch unit of the PCB board (60) through the first flexible member, and the switch unit is used to control the display or extinguishing of the light-emitting unit.

9. The waterproof structure according to claim 1, characterized in that: One of the pressing portion (31) and the sealing cover plate (20) is provided with an inserting column (33), and the other is provided with an inserting groove (26); the elastic member (40) is a spring, one end of which is sleeved on the inserting column (33) and the other end is inserted into the inserting groove (26).

10. A battery pack, characterized in that: It comprises a lower cover, the waterproof structure according to any one of claims 1 to 9 and the PCB board (60), wherein the upper cover (10) is fixed to the lower cover and the peripheral side is sealed by glue injection.

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