Pressure control assembly for valve-regulated lead storage battery

Abstract

The utility model provides a pressure control assembly for a valve control type lead storage battery, which comprises a middle cover, a cover plate groove is arranged on 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 arranged in the middle of the acid adding hole column, and a safety valve is arranged on the acid adding hole column. According to the utility model, the inner 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-regulated lead storage battery is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to lead storage battery technical field, concretely relates to a kind of pressure control assembly for valve-regulated lead-acid battery. BACKGROUND

[0002] Valve-regulated lead-acid battery is a kind of improved lead storage battery, with sealed structure and through a built-in valve to control the release of gas, without like conventional open type lead storage battery that regular water maintenance.

[0003] Valve-regulated lead-acid battery shell is usually made of polypropylene or ABS plastic (acrylonitrile, butadiene and styrene terpolymer). Valve-regulated lead-acid battery safety valve is outer cap type, with the function of controlling the internal pressure of battery. When the internal pressure of battery increases, the safety valve opens until the internal pressure of battery balances.

[0004] The utility model with publication number CN202259506U discloses a kind of battery safety valve, including valve body and valve cover, the valve body is the liquid inlet of battery, the air inlet is below valve body, valve body upper end is equipped with several gas outlets, valve cover is covered on valve body.

[0005] The utility model with publication number CN203617371U discloses a kind of battery safety valve, including the valve hole being set on the upper portion of battery shell and the valve cap being matched with valve hole, the valve hole includes the snap ring being fixedly arranged in the coaxial battery shell interior with valve hole by support leg, valve hole projects battery shell outside vertical and is equipped with valve hole outer wall, the valve cap is the hollow cylindrical structure being sealed at top, the valve cap still includes the valve cap pull rod being arranged in the middle of valve cap and the card station being equipped with in the bottom of valve cap pull rod and being matched with valve hole snap ring, the height of valve cap inner chamber is higher than the height of valve hole outer wall, the inner diameter of valve cap inner chamber is larger than the outer diameter of valve hole outer wall, the bottom of valve cap is tightly combined with battery shell, and valve cap pull rod is made of elastic material.

[0006] In the above prior art, the valve cover of battery safety valve is tightly combined with the shell of battery, and when using under charge-discharge cycle or high temperature condition, the whole plastic shell of battery and cover sheet are often deformed, so that the valve cover of safety valve cannot be normally opened and closed, leading to the failure of safety valve. After the failure of safety valve, the battery will quickly lose water, affecting the service life of battery. UTILITY MODEL CONTENTS

[0007] To solve the above problems existing in prior art, the utility model provides a kind of pressure control assembly for valve-regulated lead-acid battery, which can be normally used without being deformed by the plastic shell or cover sheet of lead storage battery.

[0008] The utility model provides a kind of pressure control assembly for valve-controlled lead-acid battery, including middle cover, the top surface of middle cover is equipped with cover piece groove, the bottom surface of cover piece groove is equipped with acid adding hole column, the middle of acid adding hole column has acid adding hole, safety valve is equipped on the acid adding hole column, the safety valve includes the valve body that when assembling, it is inserted into the acid adding hole, the valve body has the valve hole that is penetrated along the axial direction of the valve body;

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

[0010] The bottom of the side wall of the acid adding hole is provided with a clamping groove, and correspondingly, the outer periphery of the valve body is provided with a buckle for clamping into the clamping groove;

[0011] The safety valve further includes a valve core, the valve core includes a valve cap portion that is sleeved on the top of the valve body, and a plug portion that is arranged on the bottom surface of the valve cap portion and extends into the valve hole; the bottom surface of the valve cap portion or the top surface of the valve body is provided with a pressure relief groove, the plug portion has a pressure relief channel that communicates the area below the plug portion with the valve hole and the pressure relief groove; the valve cap portion further has a valve cap skirt that is fitted on the outer periphery of the valve body when assembled.

[0012] When the internal gas pressure of the valve-controlled lead-acid battery increases to the 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 closes after the internal gas pressure of the valve-controlled lead-acid battery balances.

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

[0014] Further, the annular mounting groove includes 1-4 annular mounting grooves that are arranged vertically along the outer periphery of the valve body, and each annular mounting groove is provided with one sealing ring.

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

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

[0017] Further, the diameter of the plug portion gradually decreases from bottom to top, and the valve hole has an assembly area for cooperating with the plug portion, and the inner diameter of the assembly area gradually increases from top to bottom; when assembled, the plug portion is clamped into the valve hole from the top of the valve hole. The diameter of the plug portion gradually decreases from bottom to top, which ensures that the plug portion can be sealed well even if it is slightly deformed due to aging.

[0018] Further, the bottom surface of the plug portion has a first guide inclined surface, which makes it easier to install the plug portion into the valve hole.

[0019] Further, the bottom surface of the buckle has a second guide slope for guiding the buckle to be clamped into the clamping groove; and the top surface of the acid adding hole is provided with a third guide slope at the opening, so as to facilitate the clamping of the outer peripheral bottom of the valve body into the acid adding hole.

[0020] Further, the bottom opening of the valve body is provided with a thinning area with reduced wall thickness, and the buckle is arranged at the outer periphery of the thinning area.

[0021] The valve control type lead-acid battery pressure control assembly has the following beneficial effects:

[0022] The valve control type lead-acid battery pressure control assembly has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic view of the valve control type lead-acid battery pressure control assembly of the utility model.

[0024] Fig. 2 is a sectional view of the safety valve body in the utility model.

[0025] Fig. 3 is a three-dimensional structural schematic view of the safety valve body in the utility model from one perspective.

[0026] Fig. 4 is a three-dimensional structural schematic view of the safety valve body in the utility model from another perspective.

[0027] Fig. 5 is a sectional view of the safety valve spool in the utility model.

[0028] Fig. 6 is a three-dimensional structural schematic view of the safety valve spool in the utility model.

[0029] Reference signs: middle cover 1, cover sheet groove 11, acid adding hole column 12, acid adding hole 13, clamping groove 131, third guide slope 132,

[0030] 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 spool 22, valve cap part 221, plug part 222, first guide slope 223, pressure relief channel 224, valve cap skirt 225, sealing ring 3. DETAILED DESCRIPTION

[0031] As Figs. 1-6As shown, the embodiment of the present application provides a pressure control assembly for valve-regulated lead-acid battery, which comprises a center cover 1, the top surface of the center cover 1 is provided with a cover piece groove 11, the bottom surface of the cover piece groove 11 is provided with an acid adding hole column 12, the acid adding hole column 12 has an acid adding hole 13 in the middle, and the acid adding hole column 12 is provided with a safety valve 2.

[0032] The safety valve 2 comprises a valve body 21 which is assembled to extend into the acid adding hole 13, 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.

[0033] The safety valve 2 further comprises a valve core 22, which comprises a valve cap part 221 which is sleeved on the top of the valve body 21, and a plug part 222 which is arranged on the bottom surface of the valve cap part 221 and extends into the valve hole 211. The material of the valve core 22 is acid-resistant rubber, such as butyl rubber, neoprene or silicone rubber, etc.

[0034] The bottom surface of the valve cap part 221 or the top surface of the valve body 21 is provided with a pressure relief groove 216 Figs. 1-6 Taking the case that the pressure relief groove is arranged on the top surface of the valve body as an example), the plug part 222 has a pressure relief channel 224 which communicates the area below the plug part 222 with the pressure relief groove 216. The valve cap part 221 further has a valve cap skirt 225 which is assembled to fit the outer periphery of the valve body 21.

[0035] In order to enhance the sealing between the valve body 21 and the sidewall of the acid adding hole 13, the bottom of the sidewall of the acid adding hole 13 is provided with a clamping groove 131, and correspondingly, the bottom of the outer periphery of the valve body 21 is provided with a buckle 212 which is used to be clamped into the clamping groove 131.

[0036] In order to enhance the sealing between the valve body 21 and the sidewall of the acid adding hole 13, the outer periphery of the valve body 21 is provided with a sealing ring 3 which is sealingly matched with the sidewall of the acid adding hole 13, and the outer periphery of the valve body 21 is provided with an annular mounting groove 214 which is used to mount the sealing ring 3. The annular mounting groove 214 comprises 1-4 annular mounting grooves which are arranged in an up-down interval along the outer periphery of the valve body 21, and each annular mounting groove 214 is provided with one sealing ring 3.

[0037] In order to enhance the sealing 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 which is used to be matched with the plug part 222 and has an inner diameter which gradually increases from top to bottom; during assembly, the plug part 222 is clamped into the valve hole 211 from the top. The diameter of the plug part 222 gradually decreases from bottom to top, which ensures that the plug part 222 can be sealingly matched with the valve body 21 even if it is slightly deformed due to aging.

[0038] In order to facilitate assembly, the bottom surface of the plug part 222 has a first guide inclined surface 223, the bottom surface of the buckle 212 has a second guide inclined surface 213, and the top surface of the acid adding hole 13 is provided with a third guide inclined surface 132 at the opening.

[0039] In order to facilitate assembly, the bottom of the valve body 21 is provided with a reduced thickness area 215, and the buckle 212 is arranged on the outer periphery of the reduced thickness area 215. The reduced thickness of the reduced thickness area 215 facilitates the deformation of the reduced thickness area 215 under pressure, so that the buckle 212 is clamped into the acid hole 13 and further clamped into the clamping groove 131.

[0040] 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 cover skirt 225 is attached to the outer periphery of the valve body 21; the valve body 21 is inserted into the acid hole 13 along the third guide slope 132, and at the same time, the reduced thickness area 215 at the bottom of the valve body 21 and the buckle 212 are deformed under pressure and clamped into the acid hole 13; when the buckle 212 reaches the clamping groove 131 of the side wall of the acid hole 13, the buckle 212 is clamped into the clamping groove 131 along the second guide slope 213.

[0041] During use, when the internal pressure of the valve-regulated lead-acid battery increases to the opening pressure, the gas passes through the pressure relief channel 224 and the pressure relief groove 216, opens the valve cover skirt 225, and is discharged from the valve cover skirt 225, until the internal pressure of the valve-regulated lead-acid battery is balanced and the valve cover skirt 225 is closed.

Claims

1. A pressure control assembly for a valve regulated lead acid battery comprising a center cover, the top surface of the center cover is provided with a cover sheet slot, the bottom surface of the cover sheet slot is provided with an acid filling hole column, the acid filling hole column has an acid filling hole in the middle, and a safety valve is arranged on the acid filling 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 extending through the valve body in the axial direction; The outer periphery of the valve body is provided with a sealing ring which is in sealing cooperation with the side wall of the acid adding hole; The bottom of the side wall of the acid adding hole is provided with a clamping groove, and the bottom of the outer periphery of the valve body is provided with a clasp which is used for clamping into the clamping groove; The safety valve further comprises a valve core, and the valve core comprises a valve cap portion which is sleeved on the top of the valve body, and a plug portion which is arranged on the bottom surface of the valve cap portion and extends into the valve hole; the bottom surface of the valve cap portion or the top surface of the valve body is provided with a pressure relief groove, the plug portion has a pressure relief channel which is connected with the area below the plug portion and the pressure relief groove in the valve hole; the valve cap portion further has a valve cap skirt which is attached to the outer periphery of the valve body during assembly.

2. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 1, characterized in that The outer periphery of the valve body is provided with an annular mounting groove which is used for mounting the sealing ring.

3. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 2, characterized in that The annular mounting groove comprises 1-4 annular mounting grooves which are arranged in the upper and lower directions along the outer periphery of the valve body, and each of the annular mounting grooves is provided with one of the sealing rings.

4. The pressure regulating assembly for a valve regulated lead acid battery of claim 1 wherein, The material of the valve core is acid-resistant rubber.

5. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 4, characterized in that The diameter of the plug portion gradually decreases from the bottom to the top, and the valve hole has an assembly area which is used for cooperation with the plug portion and has an inner diameter which gradually increases from the top to the bottom. During assembly, the plug portion is clamped into the valve hole from the top.

6. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 5, characterized in that The bottom surface of the plug portion has a first guide inclined surface.

7. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 1, wherein The bottom surface of the clasp has a second guide inclined surface. The top surface of the acid adding hole is provided with a third guide inclined surface at the opening.

8. A pressure regulating assembly for a valve regulated lead-acid battery as defined in claim 1, wherein The bottom of the valve body is provided with a thinning area which has a reduced wall thickness at the opening, and the clasp is arranged on the outer periphery of the thinning area.

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