Exhaust system for valve-regulated lead storage battery and valve-regulated lead storage battery

Abstract

The exhaust system comprises a middle cover, a cover plate groove is formed in the top surface of the middle cover, an acid adding hole column is arranged on the bottom surface of the cover plate groove, an acid adding hole is formed in the middle of the acid adding hole column, and a safety valve is arranged on the acid adding hole column. The internal buckle type safety valve is adopted, the valve body of the safety valve and the side wall of the acid adding hole are well sealed through the buckle and the plurality of sealing rings, and the safety valve is not easily influenced by deformation of a plastic shell and a cover plate of the lead storage battery, so that the service life of the valve control type lead storage battery is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid batteries, and in particular to an exhaust system for a valve-regulated lead-acid battery and a valve-regulated lead-acid battery. Background Art

[0002] The valve-regulated lead-acid battery is an improved lead-acid battery with a sealed structure and a built-in valve to control the release of gas. It does not require regular watering and maintenance like conventional open lead-acid batteries.

[0003] The shell of a valve-regulated lead-acid battery is usually made of polypropylene or ABS plastic (acrylonitrile, butadiene and styrene terpolymer). The safety valve of a valve-regulated lead-acid battery is an external cap type, which has the function of controlling the internal air pressure of the battery. When the internal air pressure of the battery increases, the safety valve opens until the internal air pressure of the battery is balanced and then closes.

[0004] The utility model with authorization announcement number CN202259506U discloses a battery safety valve, including a valve body and a valve cover. The valve body is the liquid filling port of the battery, the lower part of the valve body is an air inlet, the upper end of the valve body is provided with a plurality of air outlets, and the valve cover covers the valve body.

[0005] The utility model with authorization announcement number CN203617371U discloses a safety valve for a battery, including a valve hole arranged on the upper part of a battery shell and a valve bonnet matching the valve hole, the valve hole including a retaining ring coaxial with the valve hole and fixed inside the battery shell by a support leg, the valve hole protrudes out of the outside of the battery shell and a valve hole outer wall is vertically provided, the valve bonnet is a hollow cylindrical structure with a top seal, the valve bonnet also includes a valve bonnet pull rod arranged in the middle of the valve bonnet and a clamping platform matching the valve hole retaining ring provided at the bottom of the valve bonnet pull rod, the height of the valve bonnet inner cavity is higher than the height of the valve hole outer wall, the inner diameter of the valve bonnet inner cavity is larger than the outer diameter of the valve hole outer wall, the bottom of the valve bonnet fits tightly with the battery shell, and the valve bonnet pull rod is made of elastic material.

[0006] In the above-mentioned prior art, the valve cover of the battery safety valve is tightly fitted with the battery shell. When the battery is used in charge and discharge cycles or under high temperature conditions, the plastic shell and the cover sheet of the battery often deform, so that the valve cover of the safety valve cannot be opened and closed normally, resulting in failure of the safety valve. After the safety valve fails, the battery will lose water quickly, affecting the battery life. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides an exhaust system for a valve-regulated lead-acid battery and a valve-regulated lead-acid battery. The exhaust system will not fail to function normally due to deformation of a plastic shell or a cover sheet of the lead-acid battery.

[0008] The present invention provides an exhaust system for a valve-regulated lead-acid battery, comprising a middle cover, a cover plate groove being provided on the top surface of the middle cover, an acid-adding hole column being provided on the bottom surface of the cover plate groove, an acid-adding hole being provided in the middle of the acid-adding hole column, a safety valve being provided on the acid-adding hole column, the safety valve comprising a valve body extending into the acid-adding hole during assembly, the valve body having a valve hole penetrating the valve body along the axial direction;

[0009] The outer periphery of the valve body is provided with a sealing ring which is sealed with the side wall of the acid adding hole;

[0010] A slot is provided at the bottom of the side wall of the acid adding hole, and correspondingly, a buckle for being inserted into the slot is provided at the bottom of the outer periphery of the valve body;

[0011] The safety valve also includes a valve core, which includes a valve bonnet portion sleeved on the top of the valve body, and a plug portion provided on the bottom surface of the valve bonnet portion and extending into the valve hole; a pressure relief groove is provided on the bottom surface of the valve bonnet portion or the top surface of the valve body, and the plug portion has a pressure relief channel connecting the area of ​​the valve hole located below the plug portion and the pressure relief groove; the valve bonnet portion also has a valve bonnet skirt that fits against the outer periphery of the valve body during assembly.

[0012] When the gas pressure inside the valve-regulated lead-acid battery increases and reaches the valve opening pressure, the gas passes through the pressure relief channel and the pressure relief groove, pushes open the valve cap skirt, and is discharged from the valve cap skirt until the valve cap skirt is closed after the gas pressure inside the valve-regulated lead-acid battery is balanced.

[0013] Furthermore, an annular mounting groove for mounting the sealing ring is provided on the outer periphery of the valve body.

[0014] Furthermore, the annular installation grooves include 1 to 4 annular installation grooves arranged at intervals up and down along the outer circumference of the valve body, and each of the annular installation grooves is provided with a sealing ring.

[0015] Furthermore, the valve core is made of acid-resistant rubber, such as butyl rubber, chloroprene rubber or silicone rubber.

[0016] Furthermore, the valve body is made of plastic, such as ABS plastic.

[0017] Furthermore, the diameter of the plug part gradually decreases from bottom to top, and the valve hole has an assembly area for matching with the plug part, the inner diameter of which gradually increases from top to bottom; during assembly, the plug part is inserted and installed from the top of the valve hole. The diameter of the plug part gradually decreases from bottom to top, ensuring that the plug part can be well sealed with the valve body even if it is slightly aged and deformed.

[0018] Furthermore, the bottom surface of the plug portion has a first guiding slope, so that the plug portion can be installed into the valve hole more easily.

[0019] Furthermore, the bottom surface of the buckle has a second guiding slope to guide the buckle to be inserted into the slot; the top opening of the acid adding hole is provided with a third guiding slope to facilitate the outer peripheral bottom of the valve body to be inserted into the acid adding hole.

[0020] Furthermore, a thinning area with a thinned wall thickness is provided at the bottom opening of the valve body, and the buckle is provided at the periphery of the thinning area. The thinning wall thickness of the thinning area facilitates deformation of the thinning area after being compressed, so that the buckle is inserted into the acid addition hole and further inserted into the slot.

[0021] The present invention also provides a valve-regulated lead-acid battery, which includes the exhaust system for the valve-regulated lead-acid battery, and the valve-regulated lead-acid battery also includes a battery slot covering the middle cover, and a cover sheet is provided on the cover sheet slot of the middle cover.

[0022] The beneficial effects of the present invention are as follows:

[0023] The invention provides an exhaust system for a valve-regulated lead-acid battery and a valve-regulated lead-acid battery, which adopt an internal buckle-type safety valve, and the safety valve body and the side wall of the acid-adding hole are well sealed by the buckle and a plurality of sealing rings, and are not easily affected by the deformation of the plastic shell and cover sheet of the lead-acid battery, thereby improving the service life of the valve-regulated lead-acid battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic diagram of the structure of the exhaust system for the valve-regulated lead-acid battery.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the safety valve body in the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the safety valve body in the present invention from one viewing angle.

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the safety valve body in the present invention from another perspective.

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the safety valve core in the present invention.

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the safety valve core in the present invention.

[0030] Reference numerals: middle cover 1, cover plate groove 11, acid addition hole column 12, acid addition hole 13, card slot 131, third guide slope 132,

[0031] Safety valve 2, valve body 21, valve hole 211, buckle 212, second guide slope 213, annular mounting groove 214, thinning area 215, pressure relief groove 216, valve core 22, valve cap part 221, plug part 222, first guide slope 223, pressure relief channel 224, valve cap skirt 225,

[0032] Sealing ring 3, cover plate 4. DETAILED DESCRIPTION

[0033] like Figure 1-6 As shown, an embodiment of the present application provides an exhaust system for a valve-regulated lead-acid battery, comprising a middle cover 1, a cover plate groove 11 being provided on the top surface of the middle cover 1, an acid addition hole column 12 being provided on the bottom surface of the cover plate groove 11, an acid addition hole 13 being provided in the middle of the acid addition hole column 12, and a safety valve 2 being provided on the acid addition hole column 12.

[0034] The safety valve 2 comprises a valve body 21 which extends into the acid adding hole 13 during assembly, and the valve body 21 has a valve hole 211 which penetrates the valve body 21 in the axial direction. The material of the valve body 21 is plastic.

[0035] The safety valve 2 further comprises a valve core 22, which comprises a valve cap portion 221 sleeved on the top of the valve body 21, and a plug portion 222 disposed on the bottom surface of the valve cap portion 221 and extending into the valve hole 211. The valve core 22 is made of acid-resistant rubber, such as butyl rubber, chloroprene rubber or silicone rubber.

[0036] The bottom surface of the valve cap 221 or the top surface of the valve body 21 is provided with a pressure relief groove 216 ( Figure 1-6 Taking the pressure relief groove being arranged on the top surface of the valve body as an example, the plug portion 222 has a pressure relief passage 224 connecting the valve hole 211 located below the plug portion 222 and the pressure relief groove 216. The bonnet portion 221 also has a bonnet skirt 225 which is attached to the outer periphery of the valve body 21 during assembly.

[0037] In order to enhance the sealing between the valve body 21 and the side wall of the acid adding hole 13 , a groove 131 is provided at the bottom of the side wall of the acid adding hole 13 , and correspondingly, a buckle 212 for being inserted into the groove 131 is provided at the outer bottom of the valve body 21 .

[0038] In order to enhance the sealing performance between the valve body 21 and the side wall of the acid adding hole 13, a sealing ring 3 is provided on the outer periphery of the valve body 21 to seal with the side wall of the acid adding hole 13, and an annular mounting groove 214 is provided on the outer periphery of the valve body 21 for mounting the sealing ring 3. The annular mounting groove 214 includes 1 to 4 annular mounting grooves 214 arranged at intervals up and down along the outer periphery of the valve body 21, and a sealing ring 3 is provided in each annular mounting groove 214.

[0039] In order to enhance the sealing performance between the valve core 22 and the valve body 21, the diameter of the plug part 222 gradually decreases from bottom to top, and the valve hole 211 has an assembly area for matching with the plug part 222, with the inner diameter gradually increasing from top to bottom; during assembly, the plug part 222 is inserted and installed from the top of the valve hole 211. The diameter of the plug part 222 gradually decreases from bottom to top, ensuring that the plug part 222 can be well sealed with the valve body 21 even if it is slightly aged and deformed.

[0040] For ease of assembly, the bottom surface of the plug portion 222 has a first guiding slope 223 , the bottom surface of the buckle 212 has a second guiding slope 213 , and the top opening of the acid adding hole 13 is provided with a third guiding slope 132 .

[0041] In order to facilitate assembly, a thinning area 215 with a thinned wall thickness is provided at the bottom opening of the valve body 21, and the buckle 212 is provided at the outer periphery of the thinning area 215. The thinning of the wall thickness of the thinning area 215 facilitates the deformation of the thinning area 215 after being compressed, so that the buckle 212 is inserted into the acid addition hole 13 and further inserted into the clamping groove 131.

[0042] During assembly, the sealing ring 3 is installed on the sealing groove of the valve body 21; the plug part 222 of the valve core 22 is inserted into the valve hole 211 from the top of the valve hole 211 along the first guide slope 223, and the valve cap skirt 225 is fitted on the outer periphery of the valve body 21; the valve body 21 is inserted into the acid adding hole 13 along the third guide slope 132, and at the same time, the thinning area 215 at the bottom of the valve body 21 and the buckle 212 are compressed and deformed, and are inserted into the acid adding hole 13; when the buckle 212 reaches the groove 131 on the side wall of the acid adding hole 13, the buckle 212 is inserted into the groove 131 along the second guide slope 213.

[0043] The embodiment of the present application also provides a valve-regulated lead-acid battery, which includes the exhaust system for the valve-regulated lead-acid battery described above, and the valve-regulated lead-acid battery also includes a battery slot covered with the middle cover 1, and a cover sheet 4 is provided on the cover sheet slot 11 of the middle cover 1.

[0044] During use, when the air pressure inside the valve-regulated lead-acid battery increases and reaches the valve opening pressure, the gas passes through the pressure relief channel 224 and the pressure relief groove 216, pushes open the valve cap skirt 225, and is discharged from the valve cap skirt 225 until the valve cap skirt 225 is closed after the air pressure inside the valve-regulated lead-acid battery is balanced.

Claims

1. An exhaust system for a valve-regulated lead-acid battery, comprising a middle cover, a cover plate groove is provided on the top surface of the middle cover, an acid addition hole column is provided on the bottom surface of the cover plate groove, an acid addition hole is provided in the middle of the acid addition hole column, and a safety valve is provided on the acid addition hole column, characterized in that: The safety valve comprises a valve body which extends into the acid adding hole during assembly, and the valve body has a valve hole which penetrates the valve body in the axial direction; The outer periphery of the valve body is provided with a sealing ring which is sealed with the side wall of the acid adding hole; A slot is provided at the bottom of the side wall of the acid adding hole, and correspondingly, a buckle for being inserted into the slot is provided at the bottom of the outer circumference of the valve body; The safety valve also includes a valve core, which includes a valve bonnet portion sleeved on the top of the valve body, and a plug portion provided on the bottom surface of the valve bonnet portion and extending into the valve hole; a pressure relief groove is provided on the bottom surface of the valve bonnet portion or the top surface of the valve body, and the plug portion has a pressure relief channel connecting the area of ​​the valve hole located below the plug portion and the pressure relief groove; the valve bonnet portion also has a valve bonnet skirt that fits against the outer periphery of the valve body during assembly.

2. The exhaust system for a valve-regulated lead-acid battery according to claim 1, characterized in that: The outer periphery of the valve body is provided with an annular mounting groove for mounting the sealing ring.

3. The exhaust system for a valve-regulated lead-acid battery according to claim 2, characterized in that: The annular installation grooves include 1 to 4 annular installation grooves arranged at intervals up and down along the outer circumference of the valve body, and each annular installation groove is provided with a sealing ring.

4. The exhaust system for a valve-regulated lead-acid battery according to claim 1, characterized in that: The material of the valve core is acid-resistant rubber.

5. The exhaust system for a valve-regulated lead-acid battery according to claim 4, characterized in that: The diameter of the plug portion gradually decreases from bottom to top, and the valve hole has an assembly area for matching with the plug portion and the inner diameter of which gradually increases from top to bottom; During assembly, the plug portion is inserted into the top of the valve hole for installation.

6. The exhaust system for a valve-regulated lead-acid battery according to claim 5, characterized in that: The bottom surface of the plug portion has a first guiding slope.

7. The exhaust system for a valve-regulated lead-acid battery according to claim 1, characterized in that: The bottom surface of the buckle has a second guiding inclined surface; A third guiding slope is provided at the top opening of the acid adding hole.

8. The exhaust system for a valve-regulated lead-acid battery according to claim 1, characterized in that: A thinning area with a thinned wall thickness is provided at the bottom opening of the valve body, and the buckle is provided on the periphery of the thinning area.

9. A valve-regulated lead-acid battery, characterized in that: The invention comprises an exhaust system for a valve-regulated lead-acid battery according to any one of claims 1 to 8, wherein the valve-regulated lead-acid battery further comprises a battery slot which is covered with the middle cover, and a cover sheet is provided on the cover sheet slot of the middle cover.

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