CN110854450A

CN110854450A - 2V high-capacity lead storage battery

Info

Publication number: CN110854450A
Application number: CN201911038412.3A
Authority: CN
Inventors: 刘焯; 袁关锐; 曹龙泉; 樊靖园; 王超; 刘克宇; 陈军; 周文渭; 汤序锋; 张涛
Original assignee: Tianneng Battery Group Co Ltd
Current assignee: Tianneng Battery Group Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-02-28

Abstract

The invention discloses a 2V high-capacity lead storage battery, wherein the opening of a tank body is upward, positive and negative plates of a pole group are horizontally arranged, and a positive lug and a negative lug in the pole group are respectively positioned at two opposite sides of the pole group; the periphery of utmost point crowd still is equipped with the overcoat that is used for the fixed utmost point crowd of pressfitting, the overcoat includes upper cover and the lower cover of mutual lock, and the lateral wall top surface of lower cover is equipped with first gluey groove, and the upper cover has to stretch into the protruding edge in first gluey groove, it has sealed glue to pour into in the first gluey groove. The invention uses the outer sleeve to press and fix the pole group and then assembles the pole group into the battery jar, the outer sleeve is formed by buckling the upper cover and the lower cover, and the upper cover and the lower cover do not need to be provided with demoulding angles during production, thereby balancing the pressure at each position of the pole group and ensuring the effective and balanced pressure of the whole life cycle of the pole group. The polar plate is horizontally arranged, so that the phenomenon of uneven utilization rate of the polar plate caused by acid density layering of the battery is effectively prevented and improved, the service life of the battery is prolonged, and the anti-seismic performance of the battery is improved.

Description

2V high-capacity lead storage battery

Technical Field

The invention relates to the technical field of storage batteries, in particular to a 2V high-capacity lead storage battery.

Background

The lead-acid storage battery has mature technology, safety, reliability and low price, and is widely applied to various industries.

With the social progress, in recent years, the installed capacities of industries such as communication base stations, power base stations, data centers and energy storage base stations are increasing, and 2V series high-capacity batteries are generally used in the field to be connected in series and in parallel (the capacity range is 2V200 Ah-2V 3500Ah) to meet the requirements of a load end. Similar to the lead-acid storage battery used in the above fields, the product must be low in price, investment-saving, safe, stable and reliable, have an ultra-long service life (the industry requires a quality assurance standard of 5 years, and the service life is not less than 8 years), and have excellent performance according to the requirements of various industries.

For all industries using 2V series batteries, the failure mode of the product is five-flower eight-door, which mainly comprises the following steps: in addition, because the 2V series batteries have larger volume, higher weight (12 kg-230 kg) and higher height relative to other capacity batteries, the gravity influences the electrolyte density in the height direction of the batteries, the bottom concentration is higher, the grid at the bottom is seriously corroded, the utilization rate of a polar plate is low, and the service life of the product is seriously influenced

For example, utility model publication No. CN2443493 discloses a 2V series lead-acid battery, which comprises a battery case, a polar plate, a separator, and an electrolyte. The polar plate is formed by coating positive and negative lead pastes on a grid plate respectively, wherein the grid plate is a lead net made of coaxially extruded lead wires or a grid made of chemically plated pure lead on a polymer grid. The positive and negative plates and the middle partition plate are mutually stacked and compressed into a whole, and the positive and negative plates are respectively welded in the battery shell by using the bus bars.

The invention with the authorization notice number of CN105226207B discloses a lead-acid storage battery shell for 2V experiments, wherein the shape of the middle lower part of a storage battery groove is matched with the shape of a single battery pole group, the upper part is wider than the middle lower part, and a lug boss A is extended out of the upper end surface; the lug boss A is provided with a groove, a plurality of lug bosses B provided with screw fastening holes A are uniformly protruded on the outer wall of the outer edge, and a plurality of reinforcing ribs are uniformly protruded on the front end surface and the rear end surface of the storage battery groove; the outer edge of the lower end face of the storage battery cover is provided with a sealing boss C in a protruding manner, the outer wall of the sealing boss C is uniformly provided with a plurality of bosses D provided with screw fastening holes B in a protruding manner, and the upper end face of the storage battery cover is provided with a positive terminal post hole, a negative terminal post hole and an exhaust bolt hole; a silica gel gasket is arranged in the groove of the storage battery groove, and the sealing boss C of the storage battery cover is tightly pressed in the groove of the storage battery groove and fixed together by screws.

Traditional 2V battery increases gradually because of the capacity, the structure can be bigger and bigger, during the assembly of gravity direction, because of the production facility restraint, the battery structure is big more, it is heavier, the product is gone into shell pressure and can is progressively reduced, just so make things convenient for battery polar group to go into the shell, and traditional battery jar is because of drawing of patterns manufacturing reason, the compression distance of polar plate horizontal plane is differed, pressure is unbalanced, it is generally that bottom assembly pressure is less than top assembly pressure, traditional income shell mode often causes battery tab to crush, the bad problem of processing procedure such as baffle fracture influences product quality. For a tall cell structure, this slope may be more pronounced, resulting in an overall cell pressure imbalance.

Traditional 2V battery production assembly methods is rigid fit, and the battery is used for a long time, and the polar plate can carry out the creep growth all around, especially the gravity direction, and the polar plate excessively increases and surpasss the baffle, leads to the inside short circuit failure of battery, and the power of increase gathers battery terminal department, destroys battery sealing system to can take place battery cover bursting series accident. In addition, at present, in order to prevent the increase of the high-type battery, domestic manufacturers can place a compressible base plate at the bottom of a battery pole group to prevent the increase of a pole plate in the later period, but the problem caused by the structure is that the pole group falls down due to jolting in the long-distance transportation process of a product, a pole is pulled down to damage a battery pole sealing system, and the series problems of acid leakage and liquid leakage of the battery in the later period are caused.

Disclosure of Invention

The invention provides a 2V high-capacity lead storage battery with an improved structure aiming at the defects in the prior art.

A2V high-capacity lead storage battery comprises a battery jar and a pole group arranged in the battery jar, wherein the battery jar comprises a trough body and a trough cover which are mutually covered, the pole group comprises positive plates and negative plates which are alternately arranged, positive lugs and negative lugs are arranged on the positive plates and the negative plates, the opening of the trough body is upward, the positive plates and the negative plates of the pole group are horizontally arranged, and the positive lugs and the negative lugs in the pole group are respectively positioned at two opposite sides of the pole group;

the periphery of utmost point crowd still is equipped with the overcoat that is used for the fixed utmost point crowd of pressfitting, the overcoat includes upper cover and the lower cover of mutual lock, and the lateral wall top surface of lower cover is equipped with first gluey groove, and the upper cover has to stretch into the protruding edge in first gluey groove, it has sealed glue to pour into in the first gluey groove.

Preferably, a binding band for reinforcing the upper cover and the lower cover is provided on the outer circumference of the outer cover.

More preferably, the strap includes a plurality of spaced apart strips, and the outer surface of the sleeve has a groove for receiving the strap.

Preferably, the outer sleeve is arranged on two sides of the positive electrode tab and the negative electrode tab of the electrode group in an opening mode.

Preferably, the outer sleeve is provided with an acid permeable hole for electrolyte to pass through.

Preferably, the two sides of the electrode group are respectively provided with a positive electrode bus bar connected with all positive electrode lugs in series and a negative electrode bus bar connected with all negative electrode lugs in series, the positive electrode bus bar and the negative electrode bus bar are vertically arranged, and the top surfaces of the positive electrode bus bar and the negative electrode bus bar are respectively provided with a positive terminal post and a negative terminal post which penetrate through the groove cover.

More preferably, the overcoat card is gone into the inslot body, is equipped with on the inside wall of cell body and holds the holding tank of anodal busbar and negative pole busbar.

More preferably, the capping top surface is equipped with two second glue grooves that hold positive terminal post and negative terminal post respectively, and the bottom surface in second glue groove is equipped with the terminal hole that supplies end terminal post to pass, wears to overlap on the end terminal post to be equipped with O type sealing washer.

Preferably, the slot cover is further provided with a handle hole.

Preferably, the length of the polar plate is not less than 300mm, and the width of the polar plate is not less than 160 mm.

The 2V large-capacity lead storage battery is formed by fastening the upper cover and the lower cover through pressing the outer cover to fix the pole group and then assembling the pole group into the battery jar, and the upper cover and the lower cover are not required to be provided with demoulding angles during production, so that the pressure at each position of the pole group can be balanced, and the effective and balanced pressure of the pole group in the whole life cycle is ensured.

The 2V large-capacity lead storage battery is generally large in pole plate, the height of the battery is high when the lead storage battery is vertically assembled, and the uniformity of pole plate pressure drop, current density, acid density in the gravity direction and the like in the battery is poor. And when the polar plate was placed horizontally, along with the battery use, even the polar plate direction had increased, also the horizontal direction increases, and the direction of increase does not belong to the rigid assembly, has effectively stopped the battery and has used for a long time, or in the transportation, short circuit, battery fracture, acid climbing scheduling problem that consequently the problem caused.

Drawings

Fig. 1 is a schematic perspective view of a 2V large capacity lead acid battery of the present invention.

Fig. 2 is a schematic view of a partial sectional structure of a 2V large capacity lead storage battery according to the present invention.

Fig. 3 is an exploded view of the 2V large capacity lead acid battery of the present invention.

FIG. 4 is a schematic view of the structure of the jacket-fixed pole group.

Fig. 5 is a schematic diagram of an exploded structure of the jacket and the pole groups.

Fig. 6 is a sectional view of the fastening portion of the upper and lower covers.

Fig. 7 is a graph showing the density distribution of the reaction range of a 2V large-capacity lead storage battery of the prior art.

Fig. 8 is a reaction range density distribution diagram of a 2V large capacity lead storage battery of the present invention.

Detailed Description

Example 1

As shown in fig. 1-6, a 2V large capacity lead storage battery comprises a battery container and a polar group 3 arranged in the battery container, wherein the battery container comprises a container body 1 and a container cover 2 which are mutually covered, the polar group 3 comprises positive and negative plates which are alternately arranged, positive and negative lugs are arranged on the positive and negative plates, an opening of the container body 1 is upward, the positive and negative plates of the polar group 3 are horizontally arranged, and the positive lug and the negative lug in the polar group 3 are respectively positioned at two opposite sides of the polar group 3. The length of the polar plate is not less than 300mm, and the width of the polar plate is not less than 160 mm. The 2V large-capacity lead storage battery is generally large in pole plate, the height of the battery is high when the lead storage battery is vertically assembled, and the uniformity of pole plate pressure drop, current density, acid density in the gravity direction and the like in the battery is poor.

The periphery of utmost point crowd 3 still is equipped with overcoat 4 that is used for the fixed utmost point crowd 3 of pressfitting, and overcoat 4 is including the upper cover 41 and the lower cover 42 of mutual lock, and overcoat 4 is U type structure in the positive ear and the setting of negative pole ear both sides opening of utmost point crowd 3, and upper cover 41 and lower cover 42 are the polar plate level like this and when placing, even polar plate length direction has the growth in the battery use, and overcoat 4 does not influence the growth of polar plate yet. The 2V high-capacity lead storage battery is characterized in that the pole group 3 is fixed by pressing the outer sleeve 4 and then assembled in the battery jar, the outer sleeve 4 is formed by buckling the upper cover 41 and the lower cover 42, and the upper cover 41 and the lower cover 42 are produced without setting a demoulding angle, so that the pressure at each part of the pole group 3 can be balanced, and the effective and balanced pressure of the pole group 3 in the whole life cycle is ensured.

The top surface of the side wall of the lower cover 42 is provided with a first glue groove 43, the end surface of the side wall of the upper cover 41 is provided with a convex edge 44 extending into the first glue groove 43, and the first glue groove 43 is filled with a sealant 45. The outer periphery of the jacket 4 is also provided with a binding band 46 for reinforcing the upper cover 41 and the lower cover 42. The strap 46 includes a plurality of spaced apart straps, and the outer surface of the sleeve 4 has a groove 47 for receiving the strap 46. During assembly, the pole group 3 is placed in the lower cover 42, then the first glue groove 43 of the lower cover 42 is filled with the sealant 45, the upper cover 41 is pressed down, and the assembly is carried out according to the set assembly pressure, so that the convex edge 44 extends into the first glue groove 43. The upper cover 41 and the lower cover 42 are bound and fixed by the binding tape 46, and after the sealant 45 is cured, the binding tape 46 may be removed or not removed. In order to facilitate the circulation of the electrolyte, the outer sleeve 4 is provided with an acid permeable hole 48 for the electrolyte to pass through. The acid permeable holes 48 can facilitate the circulation of the electrolyte and the discharge of gases possibly generated during the use of the battery to the outside of the outer casing 4.

The two sides of the pole group 3 are respectively provided with a positive pole bus bar 5 connected with all positive pole lugs in series and a negative pole bus bar 6 connected with all negative pole lugs in series, the positive pole bus bar 5 and the negative pole bus bar 6 are vertically arranged, and the top surfaces of the positive pole bus bar 5 and the negative pole bus bar 6 are respectively provided with a positive pole post 7 and a negative pole post 8 penetrating through the slot cover 2. The jacket 4 is clamped in the groove body 1, and the inner side wall of the groove body 1 is provided with a holding groove 11 for holding the anode bus bar 5 and the cathode bus bar 6.

The 2 top surfaces of capping are equipped with two second glue grooves 21 that hold positive terminal post 7 and negative terminal post 8 respectively, and the bottom surface of second glue groove 21 is equipped with the terminal hole 22 that supplies the end terminal post to pass, wears to overlap on the end terminal post to be equipped with O type sealing washer 9. The top surfaces of the positive terminal post 7 and the negative terminal post 8 are provided with threaded wiring holes which can be directly used for wiring. The slot cover 2 is also provided with a handle hole 23 which is convenient for carrying.

Example 2

The reaction range density profile of the cell was obtained using finite element analysis software analysis. The method comprises the steps of establishing a three-dimensional polar plate model structure matrix, inputting model parameters, impedance, a magnetic field, current, voltage and other basic data into comsol finite element software, researching the reaction density, heat distribution, polar plate voltage drop distribution and the like of the polar plate through a structural unit discretization formula, and simulating the approximate reaction phenomenon of the polar plate predictably.

Fig. 7 is a 2V large capacity lead storage battery in the prior art, the polar plates are vertically placed, and the polar group is directly assembled into the battery jar without using the outer casing in the present application. Fig. 8 shows a 2V large capacity lead acid battery constructed in example 1 of the present application, in which the plates are horizontally placed and the plate groups are fixed using a casing and then assembled in a battery container.

As shown in the reaction situation diagrams of fig. 7 and 8, the reaction density, the heat dissipation capacity and the plate voltage drop distribution of the plate during the battery discharge process are analyzed.

From the two analysis diagrams of fig. 7 and 8, it can be seen that:

(1) the reaction uniformity of each region of the electrode plate in the battery is inconsistent, the reaction is severe near the pole lug side, the reaction density of the battery is increased towards the pole lug side in sequence, and the reaction at the bottom of the electrode plate is slow.

(2) In the reaction process of the battery, heat is mainly concentrated at the bottom of the lug, the bottom of the lug is an electronic convergence output end, the region is close to a load end, the internal resistance of the region is small, the heat generation of the region is concentrated due to the strong electronic convergence and reaction density, and the heat generation of the bottom of the polar plate is slow.

(3) The pressure drop distribution of the polar plates is different, and because the polar plates have different reaction severity degrees, the closer to the polar ear side of the battery, the faster the regional pressure drop is, and the slower the pressure drop at the bottom of the polar plates is;

therefore, the purpose of output from the two sides of the anode lug and the cathode lug is to ensure that the reaction of each index of the battery tends to be more balanced, the structure is more reasonable, and the performance of the product is optimized.

Claims

1. A2V high-capacity lead storage battery comprises a battery jar and a pole group arranged in the battery jar, wherein the battery jar comprises a trough body and a trough cover which are mutually covered, the pole group comprises positive plates and negative plates which are alternately arranged, and positive lugs and negative lugs are arranged on the positive plates and the negative plates;

2. A 2V large-capacity lead storage battery according to claim 1, wherein the outer periphery of said outer casing is provided with a binding band for reinforcing the upper and lower covers.

3. The 2V large capacity lead acid battery of claim 2, wherein the strapping tape includes a plurality of spaced apart strips, and the outer surface of the casing has a groove for receiving the strapping tape.

4. A 2V large capacity lead acid battery as set forth in claim 1, wherein said casing is provided to be opened at both sides of the positive electrode tab and the negative electrode tab of the electrode group.

5. A 2V large capacity lead-acid battery according to claim 1, wherein said outer casing is provided with acid permeable holes for passing an electrolyte.

6. A 2V large capacity lead acid battery as defined in claim 1, wherein said electrode group is provided at both sides thereof with a positive electrode bus bar connected in series with all the positive electrode tabs and a negative electrode bus bar connected in series with all the negative electrode tabs, respectively, said positive electrode bus bar and said negative electrode bus bar being arranged vertically, and the top surfaces of said positive electrode bus bar and said negative electrode bus bar are provided with a positive terminal post and a negative terminal post respectively penetrating said cell cover.

7. A2V high-capacity lead storage battery with large capacity as claimed in claim 6, wherein the outer sleeve is clamped in the groove body, and the inner side wall of the groove body is provided with a holding groove for holding the positive bus bar and the negative bus bar.

8. A2V high-capacity lead storage battery with high capacity as claimed in claim 6, wherein the top surface of the cover is provided with two second glue grooves for respectively accommodating the positive terminal post and the negative terminal post, the bottom surface of the second glue groove is provided with a terminal hole for the terminal post to pass through, and the terminal post is sleeved with an O-shaped sealing ring.

9. A 2V large capacity lead-acid battery according to claim 1, wherein said well cover is further provided with a handle hole.

10. A 2V large capacity lead acid battery as set forth in claim 1, wherein the length of the plate is not less than 300mm and the width of the plate is not less than 160 mm.