A narrow maze structure for a battery capable of preventing tipping and acid leakage, and a battery

Abstract

The present invention relates to the field of lead-acid batteries, and in particular to a narrow labyrinth structure of a battery that can prevent tipping and acid leakage. The narrow labyrinth structure is used between the middle cover and the upper cover of the battery, and includes a labyrinth surface, an exhaust passage, and an exhaust chamber. The labyrinth surface is arranged on the middle cover, the labyrinth surface is an inclined surface, the end of the labyrinth surface facing the acid return port is the lower end, the exhaust passage is located at the end of the labyrinth surface away from the acid return port, the exhaust passage is connected to the exhaust chamber, and a ventilation gap is provided at the position of the upper cover corresponding to the exhaust passage, and the bottom surface height of the exhaust chamber is higher than the bottom surface height of the exhaust passage. It also relates to a battery that can prevent tipping and acid leakage. The exhaust chamber of the present invention is independently arranged relative to the labyrinth surface, avoiding the problems of direct discharge of acid mist and leakage of acid liquid after the battery tipping over, thereby making the use of the battery safer and more reliable, and at the same time making the battery less likely to lose water. With the continuous use of the battery, the battery is better kept with a rich electrolyte, thereby improving the service life of the battery.

Description

Technical Field

[0001] The invention relates to the field of lead-acid batteries, and in particular to a narrow maze structure of a battery capable of preventing tipping and acid leakage, and a battery. Background Art

[0002] The flooded maintenance-free lead-acid battery for automobile starting consists of a battery slot, a middle cover, an upper cover, a handle, etc. The space between the middle cover and the upper cover usually constitutes the overall structure of the battery's acid return and reflux labyrinth. Ordinary labyrinth designs are mostly simple structures that combine acid blocking and exhaust chambers. The acid cannot be refluxed in time, and the labyrinth surface is prone to acid residue adsorption; because the exhaust chamber and the labyrinth surface are in the same space, when the car vibrates during driving, due to vibration and tilt, the acid will flow out of the acid return port to the labyrinth surface, and continue to gather in the air storage chamber space formed with the upper cover. The acid flows out of the acid return port and directly flows out of the battery through the exhaust chamber, causing acid leakage, affecting the quality and service life of the battery, and causing corrosion to the vehicle body and other adverse effects. Summary of the invention

[0003] In order to solve the problem that lead-acid batteries are prone to acid leakage, the present invention provides a narrow maze structure of a battery and a battery that can prevent acid leakage due to tipping over. The exhaust chamber is independently arranged relative to the maze surface, and the maze surface is arranged as an inclined surface and a convex block structure of the maze surface, thereby avoiding the problems of direct discharge of acid mist and leakage of acid after the battery is tipped over, so that there is more acid and gas storage space inside the battery slot, thereby improving the service life of the battery.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A narrow labyrinth structure for a battery capable of preventing tipping and acid leakage, the narrow labyrinth structure being used between a middle cover and an upper cover of a battery, a plurality of battery cells being arranged inside the battery, the middle cover and the upper cover being heat-sealed to form a plurality of cavities by connecting rib plates, the cavities corresponding to the battery cells forming cells, the middle cover of each cell being provided with an acid return port and an acid adding channel;

[0006] It includes a labyrinth surface, an exhaust channel and an exhaust chamber, wherein the labyrinth surface is arranged on the middle cover, the labyrinth surface is an inclined surface, the end of the labyrinth surface facing the acid return port is the lower end, the exhaust channel is located at the end of the labyrinth surface away from the acid return port, a ventilation gap is opened corresponding to each cell of the upper cover, the ventilation gap is connected to the exhaust channel, the exhaust channel is connected to the exhaust chamber, the exhaust chamber and the exhaust channel are connected to the middle cover and the upper cover at the upper and lower ends respectively, and the bottom height of the exhaust chamber is higher than the bottom height of the exhaust channel.

[0007] In a further preferred embodiment, a plurality of protrusions are arranged on the labyrinth surface, and the protrusions are triangular pyramid structures.

[0008] In a further preferred embodiment, the height of the bumps is 0.5 to 5 mm, and the spacing between the bumps is 0 to 5 mm.

[0009] In a further preferred embodiment, the ventilation gap is triangular in shape, with a narrow upper end and a wide lower end.

[0010] In a further preferred embodiment, a guide groove is provided on the labyrinth surface, one end of the guide groove is connected to the acid return port, and the other end of the guide groove is arc-shaped upward along the labyrinth surface.

[0011] In a further preferred embodiment, it also includes a first acid retaining wall arranged in each cell, the first acid retaining wall is arc-shaped, one end of the first acid retaining wall is connected to the exhaust chamber, or one end of the first acid retaining wall is connected to the connecting rib plate, the other end of the first acid retaining wall passes over the acid return port and the guide groove, the first acid retaining wall is arc-shaped that wraps the acid return port and the guide groove, and the other end of the first acid retaining wall is 0.5 to 5 mm away from the connecting rib plate.

[0012] In a further preferred embodiment, it also includes a second acid retaining wall arranged in each cell, one end of the second acid retaining wall is connected to the acid addition channel, and the other end is connected to the connecting rib plate, and the connecting rib plate connected to the second acid retaining wall and the connecting rib plate facing the other end of the first acid retaining wall are on the same side of the wall.

[0013] In a further preferred embodiment, a circuitous acid retaining wall structure is provided at the connection between the exhaust passage and the exhaust chamber, and an "L"-shaped channel is formed at the connection between the circuitous acid retaining wall structure and the exhaust chamber, and the width of the "L"-shaped channel is 1 to 5 mm.

[0014] In a further preferred embodiment, the circuitous acid-blocking wall structure is provided with an acid-blocking step at the connection point with the exhaust passage, and the acid-blocking step is in a "convex" shape.

[0015] In a further preferred embodiment, the exhaust chamber is located on the labyrinth surface near the acid return port, the gap between the exhaust chamber and the adjacent acid addition channel is 0.5-5 mm, and the distance between the acid addition channel and the nearest connecting rib plate is 0.5-5 mm.

[0016] In a further preferred embodiment, the inclination angle of the labyrinth surface is 0° to 6°.

[0017] A storage battery capable of preventing tipping and acid leakage comprises a battery tank body, a middle cover and an upper cover, and also comprises the narrow labyrinth structure.

[0018] Through the above technical solution, the beneficial effects of the present invention are:

[0019] 1. The present invention avoids the problem of direct discharge and leakage of acid. An exhaust channel and an exhaust chamber are arranged on the labyrinth surface of the present invention. The exhaust chamber is relatively independent from the cavity formed between the middle cover and the upper cover, that is, the exhaust chamber is relatively independent from the space on the labyrinth surface. The upper end of the exhaust chamber is connected to the outside of the upper cover, and the lower end of the exhaust chamber is connected to the exhaust channel. The exhaust channel is connected to the space in the cell, which maintains the consistency of pressure in each cell and increases the movement path of gas and acid to discharge, avoiding the phenomenon of acid directly entering the exhaust chamber from the space on the labyrinth surface, and causing water vapor to condense and reflux in the discharge path to avoid water loss in the battery.

[0020] 2. The acid liquid of the present invention has fast reflux and is not prone to adsorption, thereby maintaining the excellent performance of the battery. The present invention is provided with a convex block, and in a static state, the acid liquid will quickly reflux through the inclined labyrinth surface and the convex block of the triangular pyramid structure, and will not produce excessive adsorption; a guide groove is provided on the labyrinth surface, one end of the guide groove is connected to the acid return port, and the other end is arc-shaped upward along the labyrinth surface, which can guide the acid liquid around the acid return port and make the acid liquid quickly reflux to the acid return port.

[0021] 3. The present invention increases the resistance and flow path of the acid liquid on the flow path of the acid liquid, increases the temporary storage space of the acid liquid, thereby effectively reducing the acid liquid discharge, extending the service life of the battery, and extending the gas discharge channel, which can effectively reduce the water loss of the battery, improve the battery quality, and extend the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the structural schematic diagrams of a narrow maze structure of a battery capable of preventing tipping and acid leakage according to the present invention;

[0023] Figure 2 This is the second structural schematic diagram of a narrow maze structure of a battery capable of preventing tipping and acid leakage according to the present invention;

[0024] Figure 3 It is a structural schematic diagram of a storage battery capable of preventing tipping and acid leakage according to the present invention;

[0025] Figure 4 yes Figure 3 A partial enlarged view of

[0026] Figure 5 It is a structural schematic diagram of the middle cover of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the upper cover of the present invention;

[0028] Figure 7 It is a schematic diagram of the flow direction of gas from the acid return port to the exhaust chamber.

[0029] The numbers in the accompanying drawings are: 1 is a labyrinth surface, 2 is an exhaust chamber, 3 is an acid adding channel, 4 is a first acid retaining wall, 5 is a guide groove, 6 is an acid return port, 7 is a second acid retaining wall, 8 is a protrusion, 9 is a circuitous acid retaining wall structure, 901 is an acid retaining step, 10 is an exhaust channel, 11 is a middle cover, 12 is an upper cover, 1201 is a ventilation gap, 13 is a connecting rib plate, and 14 is a battery container body. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "horizontal", "vertical" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] like Figure 1 to Figure 7 As shown, the present embodiment provides a narrow maze structure of a battery that can prevent tipping and acid leakage. The narrow maze structure is used between the middle cover 11 and the upper cover 12 of the battery. A plurality of battery cells are arranged inside the battery. The middle cover 11 and the upper cover 12 are heat-sealed to form a plurality of cavities through a connecting rib plate 13. The cavities and the battery cells form cells corresponding to each other. The middle cover 11 of each cell is provided with an acid return port 6 and an acid addition channel 3. The cavity is also a space for temporarily storing acid liquid and gas. The narrow maze structure provided in the present embodiment includes a maze surface 1, an exhaust channel 10 and an exhaust chamber 2. The maze The labyrinth surface is arranged on the middle cover 11, the labyrinth surface 1 is an inclined surface, the end of the labyrinth surface 1 facing the acid return port 6 is the lower end, the exhaust channel 10 is located at the end of the labyrinth surface 1 away from the acid return port 6, and the upper cover 12 is provided with a ventilation gap 1201 corresponding to each cell. In the present embodiment, there are two ventilation gaps 1201 corresponding to each cell, and the ventilation gaps are connected to the exhaust channel 10, and the exhaust channel 10 is connected to the exhaust chamber 2. The upper and lower ends of the exhaust chamber 2 and the exhaust channel 10 are respectively connected to the middle cover 11 and the upper cover 12, and the bottom surface height of the exhaust chamber 2 is higher than the bottom surface height of the exhaust channel 10.

[0033] The gas is discharged through the acid return port 6, passes through the space above the labyrinth surface 1, passes through the ventilation notch 1201 on the upper cover 12, enters the exhaust channel 10, and is discharged through the exhaust chamber 2. When the battery is in a vibrating or tilted state, the acid is discharged from the acid return port 6, and the ventilation notch 1201 provided on the upper cover 12 allows the gas to pass through, but the height of the ventilation notch 1201 is higher than the height of the exhaust channel 10, which can effectively prevent the acid from entering the exhaust channel 10, so that the exhaust channel 10 and the exhaust chamber 2 are independent of the labyrinth surface. The acid return port 6 is located at the lower end of the labyrinth surface 1, and the acid flows back to the acid return port 6 along the labyrinth surface 1 under the action of gravity and enters the battery. The exhaust channel 10 is located at the higher end of the labyrinth surface, and the ground height of the exhaust chamber 2 is higher than the bottom height of the exhaust channel 10. The exhaust chamber 2 is used as an exhaust outlet, and its bottom height is located at the highest point of the narrow labyrinth structure, so that there can be more space for storing acid in the narrow labyrinth, thereby avoiding direct discharge of acid.

[0034] Furthermore, a plurality of bumps 8 are provided on the labyrinth surface 1, and the bumps 8 are triangular pyramid structures. The height of the bumps 8 is 0.5 to 5 mm, and the spacing is 0 to 5 mm. When the acid liquid refluxes to the acid return port 6, the triangular pyramid-shaped bumps 8 can promote the rapid reflux of the acid liquid without producing excessive adsorption.

[0035] Furthermore, the ventilation gap 1201 is in a triangular shape, with a narrow upper end and a wide lower end, and a height of the ventilation gap 1201 of 0.2 to 5 mm.

[0036] Furthermore, a guide groove 5 is provided on the labyrinth surface 1, one end of the guide groove 5 is connected to the acid return port 6, and the other end is arc-shaped upward along the labyrinth surface 1, and the depth of the guide groove 5 is 0.2-1.5 mm, and the width is 0.5-4 mm. The setting of the guide groove 5 guides the acid liquid around the acid return port 6, so that the acid liquid quickly flows back to the acid return port and enters the battery.

[0037] In order to further block the acid from flowing toward the exhaust channel 10, the narrow maze structure further includes a first acid retaining wall 4 arranged in each cell, wherein the first acid retaining wall 4 is arc-shaped, such as Figure 1 As shown, one end of the first acid retaining wall 4 in the left and right cells is connected to the exhaust chamber 2, one end of the first acid retaining wall 4 in the middle cell is connected to the connecting rib plate 13, the other end of the first acid retaining wall 4 passes over the acid return port 6 and the guide groove 5, the first acid retaining wall 4 is in an arc shape that wraps the acid addition channel 3 and the guide groove 5, and the other end of the first acid retaining wall is 0.5 to 5 mm away from the connecting rib plate.

[0038] In order to further block the acid liquid from flowing toward the exhaust channel 10, the narrow maze structure also includes a second acid retaining wall 7 arranged in each cell, one end of the second acid retaining wall 7 is connected to the acid addition channel 3, and the other end is connected to the connecting rib plate 13, and the connecting rib plate 13 connected to the second acid retaining wall 7 and the connecting rib plate 13 toward which the other end of the first acid retaining wall 4 is directed are the same side wall.

[0039] Furthermore, a circuitous acid-blocking wall structure is provided at the connection point between the exhaust channel 10 and the exhaust chamber 2. The circuitous acid-blocking wall structure 9 increases the path through which the gas is discharged. The connection point between the circuitous acid-blocking wall structure 9 and the exhaust chamber 2 forms an "L"-shaped channel. The width of the "L"-shaped channel is 1 to 5 mm, which can effectively reduce the water loss of the battery, block the outflow of acid, and allow the gas to be discharged through the exhaust chamber after filtering, thereby maintaining pressure balance and reducing water loss, thereby improving the quality of the battery and extending the service life of the battery.

[0040] Furthermore, the detour acid-blocking wall structure 9 is provided with an acid-blocking step 901 at the connection with the exhaust passage 10, and the detour acid-blocking wall structure 9 is provided with an acid-blocking step 901 at the connection with the exhaust passage 10, and the acid-blocking step 901 is in a "convex" shape. When the gas passes through the acid-blocking step 901, it rises, and the acid-blocking step 901 blocks the discharge of the acid liquid.

[0041] Furthermore, the labyrinth surface 1 has an inclination angle of 0° to 6°. The exhaust chamber 2 is located on the labyrinth surface 1 near the acid return port 6, further increasing the gas discharge path and the path of the acid liquid from the acid return port 6 to the exhaust chamber 2, thereby effectively reducing the occurrence of acid liquid discharge.

[0042] Furthermore, the gap between the exhaust chamber and the adjacent acid adding channel is 0.5-5 mm, and the distance between the acid adding channel and the nearest connecting rib plate is 0.5-5 mm, which increases the resistance and path of acid liquid movement while ensuring gas flow, further preventing acid liquid from being discharged.

[0043] The present embodiment also provides a battery that can prevent tipping and acid leakage, including a battery tank body 14, a middle cover 11 and an upper cover 12, and also includes the narrow labyrinth structure. When the vehicle-mounted battery provided in the present embodiment is working, the gas generated by the battery needs to be discharged into the space on the labyrinth surface 1 through the acid return port 6, and finally, after continuous circulation, it is connected to the outside through the exhaust chamber 2 to maintain the balance of internal and external pressures. At the same time, the acid in the continuous charging or tilting process will enter the space on the labyrinth surface 1 through the acid return port 6. The acid path is explained by taking the cell on the left side of the battery as an example: Figure 7As shown, the acid is discharged from the acid return port 6, first filling the space in zone A; after a certain pressure is formed in zone A, the acid overflows along the gap between the first acid retaining wall and the connecting rib plate under the action of pressure, and then the acid fills zone B; after a relatively large pressure is formed in zone B, the acid is discharged to zone C along the gap between the acid adding channel 3 and the exhaust chamber 2 under the action of pressure, and then fills zone C; then, zone D is successively filled; under the continuous resistance of the exhaust channel and the circuitous acid retaining wall structure, the acid is prevented from entering the exhaust chamber 2, and the space from the acid return port 6 to the exhaust chamber is fully utilized, and a large amount of acid can be stored, thereby avoiding the external discharge of the acid. When the on-board battery is not working, the acid will eventually flow back into the battery tank body 14 along the inclined maze surface 1 under the action of the protrusion 8 in the shape of a regular triangular pyramid and through the diversion effect of the guide groove 5, through the acid return port 6, thereby reducing the water loss of the battery, avoiding premature failure due to water loss of the battery, and improving product quality.

[0044] The narrow labyrinth structure and storage battery provided in this embodiment make the exhaust chamber 2 independent of the space on the labyrinth surface 1, increase the resistance and path length of the acid liquid flow out on the flow path of the acid liquid, the acid liquid flowing out from the acid return port 6 cannot flow directly to the exhaust chamber, and the gas discharge channel is extended, so that the water vapor is fully cooled and refluxed, which can effectively reduce the water loss of the battery, improve the battery quality, and extend the battery life.

[0045] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A narrow labyrinth structure of a battery capable of preventing tipping and acid leakage, the narrow labyrinth structure being used between a middle cover (11) and an upper cover (12) of the battery, a plurality of battery cells being arranged inside the battery, the middle cover (11) and the upper cover (12) being heat-sealed and connected via a connecting rib plate (13) to form a plurality of cavities, the cavities corresponding to the battery cells forming cells, the middle cover (11) of each cell being provided with an acid return port (6) and an acid addition channel (3), characterized in that: The invention comprises a labyrinth surface (1), an exhaust passage (10) and an exhaust chamber (2), wherein the labyrinth surface (1) is arranged on a middle cover (11), the labyrinth surface (1) is an inclined surface, the end of the labyrinth surface (1) facing the acid return port (6) is the lower end, the exhaust passage (10) is located at the end of the labyrinth surface (1) away from the acid return port (6), the upper cover (12) is provided with a ventilation notch (1201) corresponding to each cell, the ventilation notch is connected to the exhaust passage (10), the exhaust passage (10) is connected to the exhaust chamber (2), the upper and lower ends of the exhaust chamber (2) and the exhaust passage (10) are respectively connected to the middle cover (11) and the upper cover (12), and the bottom surface height of the exhaust chamber (2) is higher than the bottom surface height of the exhaust passage (10); A plurality of protrusions (8) are provided on the labyrinth surface (1), and the protrusions (8) are triangular pyramid structures; A guide groove (5) is provided on the labyrinth surface (1), one end of the guide groove (5) is connected to the acid return port (6), and the other end of the guide groove (5) is arc-shaped upward along the labyrinth surface (1); A detour acid retaining wall structure (9) is provided at the connection point between the exhaust passage (10) and the exhaust chamber (2), and an "L"-shaped passage is formed at the connection point between the detour acid retaining wall structure (9) and the exhaust chamber (2), and the width of the "L"-shaped passage is 1 to 5 mm.

2. A battery narrow maze structure capable of preventing dumping and acid leakage according to claim 1, characterized in that: It also includes a first acid retaining wall (4) arranged in each cell, the first acid retaining wall (4) being in an arc shape, one end of the first acid retaining wall (4) being connected to the exhaust chamber (2), or one end of the first acid retaining wall (4) being connected to the connecting rib plate (13), the other end of the first acid retaining wall (4) passing over the acid return port (6) and the guide groove (5), and the first acid retaining wall (4) being in an arc shape that wraps around the acid return port (6) and the guide groove (5).

3. A battery narrow maze structure capable of preventing dumping and acid leakage according to claim 2, characterized in that: It also includes a second acid retaining wall (7) arranged in each cell, wherein one end of the second acid retaining wall (7) is connected to the acid adding channel (3) and the other end is connected to the connecting rib plate (13), and the connecting rib plate (13) connected to the second acid retaining wall (7) and the connecting rib plate (13) toward which the other end of the first acid retaining wall (4) is directed are walls on the same side.

4. A battery narrow maze structure capable of preventing dumping and acid leakage according to claim 1, characterized in that: The circuitous acid-blocking wall structure (9) is provided with an acid-blocking step (901) at the connection point with the exhaust passage (10), and the acid-blocking step (901) is in a "convex" shape.

5. A battery narrow maze structure capable of preventing dumping and acid leakage according to claim 1, characterized in that: The exhaust chamber (2) is located on the labyrinth surface (1) near the acid return port (6).

6. A battery narrow maze structure capable of preventing dumping and acid leakage according to claim 1, characterized in that: The inclination angle of the labyrinth surface (1) is 0° to 6°.

7. A storage battery capable of preventing tipping and acid leakage, comprising a battery container (14), a middle cover (11) and an upper cover (12), characterized in that: It also includes the narrow maze structure as described in any one of claims 1 to 6.

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