CN210006851U

CN210006851U - horizontal lead-acid battery with filler

Info

Publication number: CN210006851U
Application number: CN201920776401.4U
Authority: CN
Inventors: 韩祖孟; 王新虎; 卢玉军; 王新征; 杨其军; 汤群星
Original assignee: Zhejiang Tyre Energy Storage Technology Co Ltd
Current assignee: Zhejiang Tyre Energy Storage Technology Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-01-31
Anticipated expiration: 2029-05-28

Abstract

The utility model provides an horizontal lead acid battery with filler, including battery case to and by just, the battery utmost point crowd that negative plate and diaphragm are constituteed, a serial communication port, just, be provided with around the negative plate and pour into, turn into solid-state filler with liquid form after the solidification treatment with liquid form into, this kind of filler can fill up all polar plate clearances, closely wraps up the polar plate, has restricted the polar plate inflation, can only to the inflation of polar plate plane vertical direction, has avoided positive negative polar plate short circuit, and horizontal battery's high assembly pressure, has restricted the active matter inflation, has guaranteed active material's completeness, makes horizontal lead acid battery's life-span improve greatly.

Description

horizontal lead-acid battery with filler

[ technical field ] A method for producing a semiconductor device

The utility model relates to an kind batteries especially relate to avoid the horizontal lead acid battery of positive, negative plate short circuit with filler and assembly method thereof.

[ background of the invention ]

The lead-acid battery starts from the research of Gaston platform in 1859 about the charging and discharging of a Pb electrode in a 10 wt% sulfuric acid solution, in 1881, Camille Faure coats a lead paste formed by mixing red lead, sulfuric acid and water on a lead plate as an electrode, and Ernest Volckmar changes the lead plate into a lead grid.

The basic structure of the traditional lead-acid battery is that positive and negative plates are formed by a grid coated with lead plaster, the positive and negative plates are separated by a diaphragm, the positive and negative plates are welded to corresponding bus bars and then connect the battery current with the outside through an electrode post, the battery cover seals the battery and prevents the electrolyte from flowing out, the plates of the traditional lead-acid battery are placed in a vertical mode, the electrolyte stratification phenomenon, namely the polarization phenomenon of electrolyte concentration difference, can occur in the using process, and the phenomenon is which is the main reason of the reduction of the battery capacity and the shortening of the service life.

In order to solve the problems, horizontal lead-acid batteries are developed, wherein polar plates are in a quasi-bipolar structure, namely positive active matters are coated on the side of a grid to form a positive plate, negative active matters are coated on the side of the grid to form a negative plate, the bipolar plates are separated by a diaphragm, are horizontally staggered and stacked according to the determined position, are then installed with a pressure frame for fixing, form a battery module, are put into a battery tank, are sealed after cast welding, and are then subjected to acid filling and formation to finally prepare the horizontal battery.

However, in the case of a lead-acid battery, the positive and negative active materials undergo different volume expansions during the electrochemical reaction, penetrate through the separator, and contact with the positive active material to cause a short circuit, or contact the positive and negative electrode plates with each other through a gap at the edge of the electrode plate to cause a short circuit, thereby causing battery failure. Therefore, the method is an effective means for improving the service life of the horizontal lead-acid battery by preventing the positive and negative electrode plates from contacting and short-circuiting due to the expansion of the battery active material.

However, the microcrystalline wax is required to be heated to 90-120 ℃ to melt and then is quickly injected (the microcrystalline wax can be kept in a liquid state at more than 90 ℃), at the moment, not only the electrolyte can be evaporated, but also the paraffin can be quickly solidified at the blocked part if a wax injection channel is blocked, so that paraffin is filled in a gap on the side of the polar plate in a battery polar group, and the other side cannot be completely filled, and the consequence is that the unfilled side accelerates the expansion of the polar plate during charge-discharge circulation, and the contact short circuit happens in advance.

Patent application CN2018216856114 discloses horizontal lead-acid battery for preventing expansion short circuit of electrode plates, wherein the battery shell is provided with a containing groove for containing expanded negative active material, thereby reducing the occurrence of positive and negative short circuit.

Therefore, in any current process, the occurrence of short circuit of the positive and negative plates cannot be avoided, and a more suitable solution needs to be developed in step .

[ summary of the invention ]

The utility model provides an horizontal lead acid battery with filler can restrict the polar plate and expand to both sides to avoid positive, negative active material contact to take place the short circuit.

The technical solution of the utility model is as follows:

horizontal lead-acid battery with filler, including battery shell, and battery pole group composed of positive and negative plates and diaphragm, characterized in that the positive and negative plates are surrounded by filler which is injected in liquid state at normal temperature, solidified and transformed into solid state, the filler can fill all the gaps of the plates, tightly wrap the plates, limit the expansion of the plates, only expand towards the vertical direction of the plate plane, avoid the short circuit of the positive and negative plates, and the extremely high assembly pressure of the horizontal battery limits the expansion of the active matter, ensure the integrity of the active matter, greatly improve the service life of the horizontal lead-acid battery.

, the filler before solidification is resin with fluidity, rubber, sodium alginate solution or asphalt, the resin can be selected from silica sol or foaming polyurethane with fluidity.

, spacers are disposed on both sides of the battery electrode groups for blocking the flow of liquid and/or gas between different battery electrode groups, and the spacers are disposed to prevent the occurrence of blow-by between different battery electrode groups at the lead wires of the bipolar plate.

, the inner surfaces of the bottom plate, the side plates and the top cover of the battery shell are provided with spacer positioning grooves corresponding to the spacers, the spacer positioning grooves are used for positioning when the spacers are assembled, and sealant can be filled to completely seal the gap between the whole spacer and the shell, so that the complete sealing between different cells is realized.

, arranging a glue injection through hole longitudinally penetrating through the bottom plate of the battery shell for injecting liquid sealant, arranging a glue containing groove for containing the sealant at the upper end and/or the lower end of the spacer, arranging a glue storage cavity groove for the sealant to flow between the side wall of the spacer and the side wall of the battery shell, filling the sealant with the glue injection through hole, the glue containing groove, the glue storage cavity groove and the spacer positioning groove after curing treatment, and , wherein the sealant has different effects with the filler, the sealant is an assembled part for sealing, and the filler is injected after formation to limit the expansion of the pole plate, prevent the contact between the positive pole and the negative pole from being short-circuited, and prolong the service life of the battery.

, the battery shell has acid inlet hole at the lower part of the side plate, and the top cover has vent hole for exhausting gas when acid or liquid filler is injected.

, arranging a rubber hole plug matched with the glue injection through hole at the opening of the glue injection through hole for realizing better sealing and beautiful effect.

, the horizontal lead-acid battery keeps the assembly pressure of 100KPa and above, the top cover and side plate of the battery shell are self-locked by the rebound force of the pole group after press mounting, for the traditional battery, the assembly pressure of is small, the strength of the plastic shell of the battery is low, which is not enough to limit the positive and negative plates to expand in the thickness direction, and is easy to cause the positive active substance to soften and fall off after expansion, while the assembly pressure of the horizontal battery pole group is large enough, which is strong enough to limit the expansion of the active substance, and ensures the integrity of the active substance.

, the separator is a bar structure composed of an elastic parent and an insert wrapped inside the elastic parent, the height of the bar structure is equal to the distance between the horizontal lead-acid battery plates,

the utility model has the advantages as follows:

the utility model injects the filler which is liquid at normal temperature and is converted into solid after solidification treatment into the horizontal lead-acid battery; the filler can fill all the gaps of the polar plates, tightly wrap the polar plates, limit the expansion of the polar plates to two sides and only expand to the direction vertical to the planes of the polar plates, avoid the short circuit of the positive and negative polar plates, limit the expansion of active substances due to extremely high assembly pressure of the horizontal battery, ensure the integrity of the active substances and greatly improve the service life of the horizontal lead-acid battery.

[ description of the drawings ]

FIG. 1 is a schematic side cross-sectional view of a horizontal lead-acid battery of example ;

fig. 2 is an enlarged view of a portion a of fig. 1.

Description of the labeling: 1, a battery housing; 2, a polar plate; 3, injecting glue into the through hole; 4, a spacer; and 5, a rubber hole plug.

[ detailed description ] embodiments

The present invention will be described in further detail in with reference to specific examples, but the present invention is not limited to the following specific examples.

The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. The present invention is not limited to the above embodiments, but may be modified in various ways.

Example

horizontal lead-acid battery with filler, as shown in fig. 1 and fig. 2, comprises a battery shell 1, and battery pole groups composed of positive plates 2 (positive and negative plates) and a diaphragm, wherein the two ends of each battery pole group are provided with physical barriers formed by a plurality of separators 4, and all the pole plates 2 are fully wrapped with filler.

The barrier member is in by elastic matrix and parcel the bar structure that the inside inserts of elastic matrix is constituteed, bar structure's height is equivalent with the interval between the horizontal lead acid battery polar plate, the internal surface of battery case's bottom plate, curb plate, top cap with the position that barrier member (being physical barrier) corresponds all is provided with the barrier member constant head tank, the upper end and/or the lower extreme of bar structure are provided with about link up and are used for the sealed gluey appearance of holding to glue recess, elastic matrix with the insert is provided with the vertical injecting glue through-hole of matched with on the same longitudinal lines, the lateral wall of barrier member with be provided with the sealed gluey chamber groove of depositing that flows that supplies between battery case's the lateral wall, battery case's curb plate lower part is provided with the acid inlet that is used for pouring into acid or liquid filler, battery case's top cap is provided with the exhaust hole when being used for pouring into acid or liquid.

The sealant is injected in a normal-temperature liquid form through the glue injection through hole 3 arranged in the spacer 4, the glue containing groove, the glue storage cavity groove, the glue injection through hole and the spacer positioning groove are gradually filled, then the glue hole plug 5 is added on the top end of the glue injection through hole 3, the sealant is converted into a solid state after being heated or subjected to power-on curing treatment, and the top cover is assembled and formed.

After formation is finished, filling materials are injected from the acid injection holes to fill gaps of all the polar plates 2, and curing is carried out, so that under the extremely high assembly pressure (100KPa and above) of the horizontal lead-acid battery, expansion of active substances can be effectively limited, short circuit of positive and negative polar plates is avoided, integrity of the active substances is ensured, and the service life of the horizontal lead-acid battery is greatly prolonged.

In the processes of acid injection and filler injection, gas in the battery is exhausted through the vent hole; the process can also be used in conjunction with vacuum equipment to speed up filling.

In this example, the filler is silica sol, before curing, the nano-scale silica particles are dispersed in water or solvent, the concentration is 5-20 wt%, after charging at 5A for 20 hours, the silica particles are polymerized and settled into gel due to charge neutralization effect, during the charging and discharging process of the battery, the coagulation effect is further deepened at , and after 50-100 charging and discharging cycles, the silica particles become solid with constant crack along with the water loss.

The assembly process of the horizontal lead-acid battery comprises the following steps:

stacking and assembling the separators, the diaphragms and the battery plates in a battery shell according to a fixed sequence, pressing a top cover for self locking, filling all the glue containing grooves, the glue injection through holes, the separator positioning grooves and the glue storage cavity grooves with glue injection through the glue injection through holes, and connecting all the separators and the lead wires clamped in the middle of the separators into bodies after curing to complete assembly;

during the activation and charging process of the battery, acid in an acid container enters the battery from an acid inlet hole at the lower part of a battery side plate, leaves the battery from an exhaust hole of a battery top cover and returns to the acid container to form a closed cycle, after the formation and charging are finished, the acid in an inner cavity of a battery cell except for parts remained in micropores of a diaphragm and a positive plate and a negative plate, and the rest acid is drawn back to the acid container from the acid inlet hole of the battery, so that a cavity determined by is formed between the plate and the side wall of the battery shell;

and injecting liquid substance filler from the acid inlet hole, discharging gas in the battery through the exhaust hole, filling the cavity between the polar plate and the side wall of the battery shell with the filler, completely surrounding the positive and negative polar plates from the periphery, and cleaning and packaging after curing to finish the battery finished product.

Battery performance detection

TABLE 1 self-discharge rate, cycle life and swelling short-circuit condition of horizontal lead-acid batteries of example

After the filler is filled, the self-discharge and expansion short circuit of the battery are improved, and the cycle life is obviously prolonged.

Example two

In the second embodiment, the filler is 1-10 wt% sodium alginate solution, is viscous paste before solidification, has constant fluidity after high-speed stirring and shearing, is pumped into the inner cavity of the battery in vacuum, and forms a jelly-like elastomer due to dehydration effect after 5A charging for 6 hours, and the elastomer is further dehydrated and hardened in steps during the charging and discharging processes of the battery.

EXAMPLE III

In the third example, the filler is epoxy glue, which is a liquid with very low viscosity and good fluidity before curing, and becomes a hard transparent solid connected into bodies after being placed in a drying kiln for 2 hours at a constant temperature of 60 ℃.

Claims

The horizontal lead-acid battery with the filler is characterized in that the filler which is injected in a liquid state at normal temperature and is converted into a solid state after solidification treatment is arranged around the positive plate and the negative plate.
2. The horizontal lead-acid battery with filler according to claim 1, characterized in that the filler before curing is a resin with fluidity, rubber, sodium alginate solution or asphalt.
3. The horizontal lead-acid battery with filler according to claim 2, characterized in that the resin before curing is a silica sol or a foamed polyurethane with fluidity.
4. The horizontal lead acid battery with filler according to claim 1, characterized in that both sides of the battery pole groups are provided with separators for blocking liquid and/or gas flow between different battery pole groups.
5. The horizontal lead-acid battery with filler according to claim 4, characterized in that the inner surfaces of the bottom plate, the side plates and the top cover of the battery shell are provided with spacer positioning grooves at positions corresponding to the spacers.
6. The horizontal lead-acid battery with the filler according to claim 5, wherein the spacer is provided with a longitudinal glue injection through hole penetrating through a bottom plate of the battery case for injecting liquid sealant, the upper end and/or the lower end of the spacer is provided with a glue accommodating groove for accommodating the sealant, a glue storage cavity groove for the sealant to flow is arranged between the side wall of the spacer and the side wall of the battery case, and the glue injection through hole, the glue accommodating groove, the glue storage cavity groove and the spacer positioning groove after curing are all filled with the sealant.
7. The horizontal lead-acid battery with filler according to claim 4, characterized in that the lower part of the side plate of the battery shell is provided with an acid inlet hole for injecting acid or liquid filler, and the top cover of the battery shell is provided with an exhaust hole for exhausting gas when injecting acid or liquid filler.
8. The horizontal lead-acid battery with the filler according to claim 6, characterized in that the opening of the glue injection through hole of the horizontal lead-acid battery is provided with a glue hole plug matched and sealed with the glue injection through hole.
9. The horizontal lead-acid battery with filler of any of claims 1-8, wherein the horizontal lead-acid battery maintains an assembly pressure of 100KPa and above, and the top cover and side plates of the battery shell are self-locked by the resilience of the pole group after press-fitting.
10. The horizontal lead acid battery with filler of any of claims 4-8, wherein the separator is a bar structure consisting of an elastic matrix and an insert wrapped inside the elastic matrix, and the height of the bar structure is equivalent to the spacing between the plates of the horizontal lead acid battery.