Battery cover capable of preventing liquid leakage and storage battery

Abstract

The battery cover capable of preventing liquid leakage comprises a large battery cover and a small battery cover which is thermally sealed on the large battery cover, and the large battery cover comprises a liquid injection hole, an exhaust backflow hole and a lower labyrinth structure; the small battery cover comprises a liquid injection hole cover, an exhaust hole, an upper labyrinth structure and a flow limiting pile, the upper labyrinth structure and a lower labyrinth structure are completely sealed and bonded to form a labyrinth, the flow limiting pile is inserted into the exhaust backflow hole and is of a cylindrical structure, and an exhaust groove is formed in the lower end of the flow limiting pile in the axial direction. According to the utility model, the electrolyte can be trapped in the labyrinth structure after the battery is violently shaken or even inverted, the electrolyte is prevented from leaking, and the electrolyte can flow back into the battery jar body after the battery is recovered to be in a standing state.

Description

Technical Field

[0001] The utility model belongs to the field of storage batteries, and in particular relates to a battery cover and a storage battery. Background Art

[0002] Lead-acid batteries are widely used in vehicles to meet the needs of automobile starting and power. During the transportation of lead-acid batteries, they are inevitably subject to extreme conditions such as up and down bumps, left and right shaking, and inversion, which can cause electrolyte leakage. If the electrolyte height is too low, the battery performance will be reduced or even damaged. Therefore, it is necessary to ensure that the battery electrolyte does not leak and the electrolyte is kept within a certain height range to meet the battery's electrolyte retention performance requirements to ensure the normal operation of the battery. Summary of the invention

[0003] The utility model aims to provide a battery cover and a storage battery for preventing leakage in order to meet the requirements for electrolyte retention performance in all use environments. The battery can be ensured to be trapped in the maze structure to prevent leakage when the battery is violently shaken or even inverted. When the battery returns to a static state, the electrolyte can flow back into the battery tank.

[0004] The technical scheme of the utility model is: a battery cover for preventing leakage, comprising a large battery cover and a small battery cover heat-sealed on the large battery cover, wherein the large battery cover comprises a liquid injection hole, an exhaust reflux hole and a lower labyrinth structure; the small battery cover comprises a liquid injection hole cover, an exhaust hole, an upper labyrinth structure and a current limiting pile, wherein the upper labyrinth structure and the lower labyrinth structure are completely sealed and bonded to form a labyrinth, the current limiting pile is inserted at the exhaust reflux hole, the current limiting pile is a cylindrical structure, and an exhaust groove is axially arranged at the lower end of the current limiting pile.

[0005] The lower maze structure includes a lower maze retaining wall and a maze bottom. The maze bottom is a slope. The lowest point of the slope of the lower maze structure is the exhaust reflow hole. The upper maze retaining wall of the upper maze structure corresponds to the lower maze retaining wall of the lower maze structure to form a maze retaining wall.

[0006] The lower end surface of the current limiting pile is flush with the lower end surface of the exhaust return hole.

[0007] The lower end of the current limiting pile is provided with reinforcing ribs arranged along the axial direction, and the reinforcing ribs and the exhaust grooves are arranged alternately.

[0008] There are two exhaust grooves, and the lower end of the current limiting pile is divided into two current limiting claws by the exhaust groove, and each current limiting claw has a reinforcing rib on its inner surface.

[0009] The height of the exhaust groove is lower than the height of the flow limiting pile, and the height of the flow limiting pile is higher than the height of the exhaust reflow hole.

[0010] The exhaust hole is communicated with the interior of the maze, and is communicated with the interior of the battery tank through the exhaust reflux hole.

[0011] The labyrinth retaining wall has a labyrinth bending structure with multiple sections of exhaust and restricts liquid flow.

[0012] A storage battery comprises a battery container, a battery handle and also comprises the battery cover for preventing leakage as mentioned above.

[0013] The battery container body and the battery cover are completely bonded together by hot melting.

[0014] A current limiting column is added to the battery small cover corresponding to the exhaust reflux hole on the battery large cover, and an exhaust groove is set at the end of the current limiting column, so that the electrolyte of the storage battery using the utility model can be prevented from leaking under extreme working conditions while effectively ensuring the exhaust effect, so as to meet the requirements for maintaining the performance of the electrolyte under all use environments (including extreme working conditions). The maze structure in the battery cover of the utility model can trap the electrolyte and allow the electrolyte to flow back into the battery slot after the battery is left to stand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model storage battery;

[0016] Figure 2 This is the front view of the battery cover;

[0017] Figure 3 It is a three-dimensional picture of the large battery cover;

[0018] Figure 4 This is the front view of the battery cover;

[0019] Figure 5 It is a three-dimensional image of the small battery cover. DETAILED DESCRIPTION

[0020] Figure 1-5 In the utility model, the storage battery includes a battery tank body 1, a large battery cover 2, a small battery cover 3, and a battery handle 4. The large battery cover 2 includes a liquid injection hole 201, an exhaust reflux hole 202, and a lower labyrinth structure 203. The small battery cover 3 includes a liquid injection hole cover 301, an exhaust hole 302, an upper labyrinth structure 303, and a current limiting pile 304. The battery tank body 1 and the large battery cover 2 are hot-melted to completely bond the two structures of PP material together, without any gap, and cannot be separated. The large battery cover 2 and the small battery cover 3 are hot-melted to completely bond the two structures of PP material together. The liquid injection hole 201 is completely sealed and bonded with the liquid injection hole cover 301; the lower labyrinth structure 203 and the upper labyrinth structure 303 are completely sealed and bonded to form a labyrinth structure (referred to as a labyrinth); the current limiting pile 304 is inserted into the exhaust reflux hole 202; the exhaust hole 302 is connected to the inside of the labyrinth, and is connected to the inside of the battery tank body 1 through the exhaust reflux hole 202.

[0021] The bottom surface of the lower labyrinth structure 203 is an inclined surface, and the bottom surface of the labyrinth has a certain slope, and the lowest point is the exhaust reflux hole 202. When the battery is inverted, the electrolyte will be trapped in the labyrinth structure, and when the battery returns to a static state, the electrolyte can flow back into the battery tank 1.

[0022] The lower labyrinth structure 203 has a multi-stage labyrinth bending structure for exhausting gas and restricting liquid flow.

[0023] The flow-limiting pile 304 is inserted into the exhaust return hole 202. The flow-limiting pile 304 has the function of exhausting and limiting the flow of liquid. The lower end of the flow-limiting pile 304 is an exhaust groove 305. There are two exhaust grooves 305. The lower end of the flow-limiting pile 304 is divided into two flow-limiting claws by the exhaust groove 305. Each flow-limiting claw has a reinforcing rib 306 on the inner surface. The reinforcing rib 306 and the exhaust groove 305 are arranged alternately. The lower end surface of the flow-limiting pile 304 is flush with the lower end surface of the exhaust return hole 202. The height of the exhaust groove 305 is 7mm, the height of the flow-limiting pile 304 is 25.3mm, and the height of the exhaust return hole 202 is 22.5mm.

Claims

1. A battery cover for preventing leakage, characterized in that: The invention comprises a large battery cover (2) and a small battery cover (3) heat-sealed on the large battery cover, wherein the large battery cover (2) comprises a liquid injection hole (201), an exhaust reflux hole (202), and a lower labyrinth structure (203); the small battery cover (3) comprises a liquid injection hole cover (301), an exhaust hole (302), an upper labyrinth structure (303), and a flow limiting pile (304), wherein the upper labyrinth structure (303) and the lower labyrinth structure (203) are completely sealed and bonded to form a labyrinth, and the flow limiting pile (304) is inserted into the exhaust reflux hole (202), and the flow limiting pile (304) is a cylindrical structure, and an exhaust groove (305) is arranged axially at the lower end of the flow limiting pile (304).

2. The battery cover for preventing leakage according to claim 1, characterized in that: The lower labyrinth structure (203) comprises a lower labyrinth retaining wall and a labyrinth bottom surface. The labyrinth bottom surface is an inclined surface. The lowest point of the inclined surface of the lower labyrinth structure (203) is the position of the exhaust return hole (202). The upper labyrinth retaining wall of the upper labyrinth structure (303) corresponds to the lower labyrinth retaining wall of the lower labyrinth structure (203) to form a labyrinth retaining wall.

3. The battery cover for preventing leakage according to claim 1, characterized in that: The lower end surface of the flow-limiting pile (304) is flush with the lower end surface of the exhaust gas reflow hole (202).

4. The battery cover for preventing leakage according to claim 1, characterized in that: The lower end of the flow-limiting pile (304) has a reinforcing rib (306) arranged along the axial direction, and the reinforcing rib (306) and the exhaust groove (305) are arranged alternately.

5. The battery cover for preventing leakage according to claim 1, characterized in that: There are two exhaust grooves (305), and the lower end of the flow-limiting pile (304) is divided into two flow-limiting claws by the exhaust groove (305), and each flow-limiting claw has a reinforcing rib (306) on its inner surface.

6. The battery cover for preventing liquid leakage according to claim 1, characterized in that: The height of the exhaust groove (305) is lower than the height of the flow limiting pile (304), and the height of the flow limiting pile (304) is higher than the height of the exhaust reflow hole (202).

7. The battery cover for preventing leakage according to claim 1, characterized in that: The exhaust hole (302) is in communication with the interior of the labyrinth, and is in communication with the interior of the battery tank (1) through the exhaust reflux hole (202).

8. The battery cover for preventing liquid leakage according to claim 2, characterized in that: The labyrinth retaining wall has a labyrinth bending structure with multiple sections of exhaust and restricts liquid flow.

9. A storage battery, characterized in that: It comprises a battery container (1), a battery handle (4), and also comprises a battery cover for preventing leakage as claimed in any one of claims 1 to 8.

10. The battery according to claim 9, characterized in that: The battery container (1) and the battery cover (2) are completely bonded together by hot melting.

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