CN205355188U - Valve control sealed lead -acid accumulator - Google Patents

Abstract

The utility model relates to a valve control sealed lead -acid accumulator, including sealed casing, be equipped with one -way discharge valve on the casing, be equipped with a set ofly in the casing or multiunit electrode subassembly, electrode subassembly mainly comprises a plurality of positive plates and the negative plate that are parallel to each other, positive plate and negative plate distribute in turn, are equipped with first baffle and second baffle between adjacent positive plate and the negative plate, first baffle receives the formula baffle for what can receive and see through electrolyte, the second baffle is seeing through the filtration formula baffle of electrolyte, first baffle can adopt AGM, wraps up corresponding positive plate in wherein, the second baffle can adopt PE filtration membrane to the preferred bag form of being wraps up corresponding negative plate in wherein. The utility model discloses the permission further reduces the interval between AGM thickness and the positive negative plate on prior art's basis to be favorable to reducing or avoiding because of short circuit and little short circuit that active material drops and leads to, improve the capacity of battery, increase of service life from this.

Description

Valve controlled sealed lead-acid accumulator

Technical field

This utility model relates to a kind of valve controlled sealed lead-acid accumulator.

Background technology

The pole plate assembly of valve controlled sealed lead-acid accumulator is mainly made up of some positive plates arranged in parallel and negative plate, positive and negative pole plate is alternately distributed, adjacent positive and negative pole plate is provided with glass fibre separator (AbsorptiveGlassMat between the two, it is called for short AGM), glass fibre separator is applied not only to receive and store electrolyte, but also is possible to prevent the short circuit between positive/negative plate, is conducive to accumulator to reduce volume, be conducive to reducing pole plate vibration, be advantageously implemented lean solution design.

But, along with expansion and the technological progress of range of application, the requirement of pole plate assembly is improved constantly.Such as, for controlling the fuel-engined vehicle impact on atmospheric environment, electric automobile develops rapidly in recent years, need to increase accumulator capacity for improving distance travelled, against the background of the prior art, a kind of effective technology path is exactly increase quantity of polar plate under certain volume, therefore not only need to add sheet to pole plate is thinning, but also the thickness of AGM dividing plate should be reduced, but in order to avoid short-circuit between plates, under existing the pole plate assembly structure that AGM dividing plate is set, AGM block board thickness has its lower thickness limit value, lower than can hinder the use affecting accumulator after lower thickness limit value because of short circuit.And for example, requirement along with national energy-saving environmental protection, solar energy photovoltaic system has been listed state key in and has been helped project, wherein matched accumulator is the key component of photovoltaic system, also it is one of whole system life-span minimum composition, the major reason affecting its service life is exactly in photovoltaic system runs, due to reasons such as weather, battery recycles for a long time often under low retained storage capacity, and under low capacity, lead plaster/Hydrocerussitum (Ceruse) isoreactivity matter-pole is easy to fall off and is distributed in electrolyte, causes battery short circuit or micro-short circuit.

Utility model content

In order to overcome the drawbacks described above of prior art, this utility model provides a kind of valve controlled sealed lead-acid accumulator, this accumulator adopts double; two dividing plate electrode assemblie design, arrange for the pole plate assembly of mono-layer of dividing plate of AGM relative to existing, the AGM thickness in pole plate assembly can be reduced further, and then the spacing between reduction positive/negative plate, quantity of polar plate can be increased when constancy of volume, improve accumulator capacity, and advantageously reduce or avoid to come off the short circuit and micro-short circuit caused because of active substance, the capacity of this accumulator is high, long service life.

This utility model be the technical scheme is that a kind of valve controlled sealed lead-acid accumulator, including the housing sealed, described housing is provided with one-way exhaust valve, one or more groups electrode assemblie it is provided with in described housing, described electrode assemblie mainly some positive plates and negative plate by being parallel to each other form, described positive plate and negative plate are alternately distributed, the first dividing plate and second partition it is provided with between adjacent positive plate and negative plate, described first dividing plate be can receive and pass through electrolyte receive formula dividing plate, described second partition is the filtering type dividing plate that can pass through electrolyte, described positive plate connects the positive terminal installed on the housing, described negative plate connects the negative terminal installed on the housing.

The beneficial effects of the utility model are: owing to being provided with the second partition with filter capacity at positive/negative plate and not requiring that second partition receives and stores electrolyte, therefore its thickness can much smaller than the thickness (such as the 1/10 of the first block board thickness) of the first dividing plate, and alleviate the filtering requirement even eliminated the first dividing plate, the thickness of the first dividing plate is reduced to below the lower thickness limit value of lower first dividing plate of single layer separator structure (such as the 1/3 of this lower thickness limit value) and still ensure that the active substance come off from pole plate will not cause short circuit and the micro-short circuit of positive and negative electrode, therefore the gross thickness of the first dividing plate and second partition can be made to be significantly less than the lower thickness limit value of lower first dividing plate of single layer separator structure, saved space may be used for increasing the quantity of pole plate, thus the accumulator under same volume can have bigger capacity, and due to against the background of the prior art, second partition can adopt strainability etc. to be substantially better than the thin-film material of AGM, can more effectively and reliably stop that on pole plate, Hydrocerussitum (Ceruse) isoreactivity material is taken off and penetrate in AGM dividing plate, thus greatly reduce, alleviate and even avoid the short circuit and/or micro-short circuit caused because active substance comes off, significantly enhance the service life of accumulator, contrast experiment according to applicant, in as solar energy photovoltaic system during energy-storage battery, longer cell life 1-3 times can be made, life termination, dissect as the complete argillization of lead plaster and grid corrosion fracture cause, do not find short circuit and micro-short circuit phenomenon.

Accompanying drawing explanation

Fig. 1 is the organigram of this utility model pole plate assembly.

Detailed description of the invention

Referring to Fig. 1, the valve controlled sealed lead-acid accumulator that this utility model provides includes the housing sealed, described housing is provided with one-way exhaust valve, one or more groups electrode assemblie it is provided with in described housing, described electrode assemblie mainly some positive plates 2 and negative plate 1 by being parallel to each other form, described positive plate and negative plate are alternately distributed, the first dividing plate 4 and second partition 3 it is provided with between adjacent positive plate and negative plate, described first dividing plate be can receive and pass through electrolyte receive formula dividing plate, described second partition is the filtering type dividing plate that can pass through electrolyte, described positive plate connects the positive terminal (positive terminal) installed on the housing, described negative plate connects the negative terminal (negative terminal) installed on the housing.Owing to being provided with the second partition being exclusively used in filtration in electrode assemblie, reduce or eliminate the filtering requirement to the first dividing plate, even if the active material particle come off from positive plate enters or through the first dividing plate, also cannot contact with negative plate, the active material particle come off from negative plate is blocked in negative plate side, dividing plate and the first baffle contacts cannot be passed, thus serve the effect preventing short circuit and micro-short circuit.

Preferably, described first dividing plate is positioned at positive plate side, and described second partition is positioned at negative plate side, is beneficial to the substance transfer of discharge and recharge course of reaction.

Preferably, adjacent according to this described positive plate, second partition, do not stay gap between the first dividing plate and negative plate or only leave the minim gap needed for I& M, thus not only contributing to reduce volume, but also be conducive to lean solution to design.

Preferably, described second partition takes the shape of a bag or chip, described negative plate is positioned at described chip or bag-shaped second partition, from there through second partition sheet or bag, negative plate is all wrapped up from bottom to surrounding, even if active substance comes off from positive plate, also can only fall into outside second partition bag, will not contact with negative plate.

Preferably, described bag-shaped or chip second partition is close to the outside of the described negative plate being located therein, and thus can be effectively prevented or minimizing activity material comes off from positive plate.

Described first dividing plate can take the shape of a bag or lamellar.

When described first dividing plate takes the shape of a bag, described positive plate is positioned at described the first bag-shaped dividing plate.In the case, the outside of the described positive plate being located therein is close to by described the first bag-shaped dividing plate, thus can be effectively prevented or minimizing activity material comes off.

Preferably, the thickness of described second partition is less than the thickness of described first dividing plate.Such as, the thickness of described second partition is not more than the 1/5 or 1/10 of described first block board thickness.

Preferably, the thickness of described first dividing plate is not more than the 1/2 or 1/3 of the lower thickness limit value of lower first dividing plate of single layer separator structure.

Described first dividing plate can adopt AGM.

Described second partition can be made up of PE material, to meet the corresponding material performance requirement used under environment, it is ensured that reliability, increases the service life.

Described second partition can adopt PE filter membrane, for instance microporous filter membrane, to utilize current material, reduces preparation cost.

The lower thickness limit value of lower first dividing plate of single layer separator structure alleged by this specification refers to when only arranging the first dividing plate between positive/negative plate, allowing the minima of the first block board thickness adopted under ensureing accumulator property and/or prescription situation, this lower limit can be dependent on the first dividing plate material therefor and battery designs requirement.

Granule alleged by this specification includes the granule of solid particle, paste/colloidal particle and other forms.

Alleged the referring to through electrolyte of this specification allows the composition in electrolyte to transfer to opposite side from side, composition in described electrolyte includes the ion and the molecular chaperones that are formed in electrolyte by solvent and solute, also ion and molecular chaperones that discharge and recharge reaction is formed are included, the porous that porous material self has can be utilized through mode, can also be utilize the through hole processed on dividing plate, or above-mentioned both.

Each preferred and optional technological means disclosed in this utility model, unless otherwise indicated and preferred or optional technological means be, outside the limiting further of another technological means, all in any combination, some different technical schemes can be formed.

Claims (10)

1. a valve controlled sealed lead-acid accumulator, including the housing sealed, described housing is provided with one-way exhaust valve, one or more groups electrode assemblie it is provided with in described housing, described electrode assemblie mainly some positive plates and negative plate by being parallel to each other form, described positive plate and negative plate are alternately distributed, it is characterized in that being provided with between adjacent positive plate and negative plate the first dividing plate and second partition, described first dividing plate be can receive and pass through electrolyte receive formula dividing plate, described second partition is the filtering type dividing plate that can pass through electrolyte, described positive plate connects the positive terminal installed on the housing, described negative plate connects the negative terminal installed on the housing.

2. valve controlled sealed lead-acid accumulator as claimed in claim 1, it is characterised in that described first dividing plate is positioned at positive plate side, and described second partition is positioned at negative plate side, and the thickness of described second partition is less than the thickness of described first dividing plate.

3. valve controlled sealed lead-acid accumulator as claimed in claim 2, it is characterised in that described second partition takes the shape of a bag, and described negative plate is positioned at described bag-shaped second partition.

4. valve controlled sealed lead-acid accumulator as claimed in claim 3, it is characterised in that described first dividing plate takes the shape of a bag or lamellar, and when described first dividing plate takes the shape of a bag, described positive plate is positioned at described the first bag-shaped dividing plate.

5. valve controlled sealed lead-acid accumulator as claimed in claim 4, it is characterised in that the outside of the described positive plate being located therein is close to by described the first bag-shaped dividing plate.

6. valve controlled sealed lead-acid accumulator as claimed in claim 5, it is characterised in that the thickness of described second partition is not more than the 1/5 of described first block board thickness.

7. valve controlled sealed lead-acid accumulator as claimed in claim 6, it is characterised in that the thickness of described first dividing plate is not more than the 1/2 of the lower thickness limit value of lower first dividing plate of single layer separator structure.

8. the valve controlled sealed lead-acid accumulator as described in claim 1,2,3,4,5,6 or 7, it is characterised in that described first dividing plate adopts AGM.

9. valve controlled sealed lead-acid accumulator as claimed in claim 8, it is characterised in that described second partition is made up of PE material.

10. valve controlled sealed lead-acid accumulator as claimed in claim 9, it is characterised in that described second partition adopts PE filter membrane.