阅读说明：本技术 起动用双极性水平铅酸蓄电池 (Bipolar horizontal lead-acid battery for starting ) 是由 张冰冰 刘毅 张伟 林小毅 何亦仁 于 2021-08-04 设计创作，主要内容包括：本发明属于水平铅酸蓄电池技术领域,具体涉及一种起动用双极性水平铅酸蓄电池,包括：壳体；双极性极板和隔板,双极性极板与隔板相互交替、水平叠加装配在壳体内；水平叠加时,双极性极板中间、相邻隔板之间形成纵向空间；设于纵向空间的隔墙,隔墙与隔板连接面设有迷宫结构,迷宫结构与隔板相抵。本发明的起动用双极性水平铅酸蓄电池结构采用双极性极板,该极板正负极板栅筋条相连,该相连的栅筋条取代现有单格间的穿壁焊连接方式,内阻降低,利于大电流放电；其次,在蓄电池隔墙中设计迷宫,形成弯曲回路,能延长氧气运动路径,有利于负极的氧复合。(The invention belongs to the technical field of horizontal lead-acid storage batteries, and particularly relates to a bipolar horizontal lead-acid storage battery for starting, which comprises: a housing; the bipolar polar plates and the clapboards are mutually alternated and horizontally overlapped and assembled in the shell; when horizontally superposed, a longitudinal space is formed between the middle and the adjacent partition plates of the bipolar polar plates; locate the partition wall in vertical space, the partition wall is connected the face with the baffle and is equipped with labyrinth structure, and labyrinth structure offsets with the baffle. The bipolar horizontal lead-acid storage battery structure for starting adopts a bipolar polar plate, grid ribs of the positive polar plate and the negative polar plate of the polar plate are connected, and the connected grid ribs replace the wall-penetrating welding connection mode among the existing single cells, so that the internal resistance is reduced, and the large-current discharge is facilitated; secondly, a labyrinth is designed in the partition wall of the storage battery to form a bent loop, so that the oxygen movement path can be prolonged, and oxygen recombination of a negative electrode is facilitated.)

1. A bipolar horizontal lead-acid battery for starting, comprising:

a housing;

the bipolar polar plates and the clapboards are mutually alternated and horizontally overlapped and assembled in the shell; when the bipolar plates are horizontally overlapped, a longitudinal space is formed between the middle and adjacent separators of the bipolar plates;

locate the partition wall in vertical space, the partition wall with the baffle connection side is equipped with labyrinth structure, labyrinth structure with the baffle offsets.

2. The dual polarity horizontal lead acid battery for starting according to claim 1, wherein the labyrinth structure comprises a plurality of guide grooves with a vent structure disposed between each adjacent guide groove, the labyrinth structure further comprising a control valve for controlling gas discharge out of the labyrinth, the control valve being disposed on the guide grooves.

3. The dual polarity horizontal lead acid battery for starting according to claim 2, wherein a barrier wall is provided between each adjacent guiding grooves, the air venting structure 52 is provided on the barrier wall, and the air venting structure is distributed up and down on the adjacent barrier walls.

4. The starting bipolar horizontal lead acid battery as claimed in claim 2, wherein a gas channel is provided at the bottom of the labyrinth structure, the gas channel abutting against the separator.

5. The dual polarity horizontal lead acid battery for starting according to claim 4, wherein a bottom of one of said guide grooves is provided with a vent structure, said vent structure communicating with said gas passage.

6. The starting bipolar horizontal lead acid battery according to any one of claims 1 to 5, wherein said case is provided with a locking groove for fixing said partition wall in a length direction.

7. The bipolar horizontal lead-acid battery for starting of claim 6, wherein the partition wall comprises clamping strips clamped in the clamping grooves, a gap layer is reserved between the clamping strips, rubber layers are arranged at two ends of the gap layer, and the gap layer is filled with a sealing material.

8. The starting bipolar horizontal lead-acid battery according to claim 7, wherein the bipolar plate is produced by continuous casting and rolling to obtain two plate grids with the same size, positive and negative lead pastes are coated to obtain positive and negative plates, and the positive and negative plates are connected by ribs.

Technical Field

The invention belongs to the technical field of horizontal lead-acid storage batteries, and particularly relates to a bipolar horizontal lead-acid storage battery for starting.

Background

The lead-acid storage battery groove body structure for automobile starting is designed according to voltage, a lead-acid storage battery for automobile starting is 12V, each unit cell is 2V, 6 unit cells are required to be connected in series, each unit cell is independent, electrolyte cannot penetrate through the unit cell, polar plates of a traditional AGM poor liquid type storage battery are generally vertically assembled, namely a single positive plate, a partition plate and a single negative plate are vertically assembled, the single positive plate and the single negative plate are connected through wall-penetrating welding, the polar plates are cast and welded together through polar lugs according to the required number of the polar lugs according to capacity, the connection structure enables the internal resistance of the storage battery to be large, the discharging current of the lead-acid storage battery for automobile starting is large and is generally 7-10 times of the capacity of the storage battery, and the internal resistance greatly limits the starting current.

Moreover, although the labyrinth structure is assembled in the existing storage battery structure, as disclosed in patent CN106654081A, the labyrinth structure is disposed on the storage battery cover and located at the upper end of the storage battery, and this structure is not conducive to oxygen recombination for a horizontal lead-acid storage battery, which leads to premature water loss and rejection of the storage battery.

Disclosure of Invention

The invention aims to provide a structure of a bipolar horizontal lead-acid storage battery for starting, so as to solve one or more of the problems.

According to one aspect of the present invention, there is provided a bipolar level lead-acid battery for starting, comprising:

a housing;

the bipolar polar plates and the clapboards are mutually alternated and horizontally overlapped and assembled in the shell; when horizontally superposed, a longitudinal space is formed between the middle and the adjacent partition plates of the bipolar polar plates;

locate the partition wall in vertical space, partition wall and baffle connection side are equipped with labyrinth structure, and labyrinth structure offsets with the baffle.

Therefore, the bipolar horizontal lead-acid storage battery structure for starting adopts the bipolar polar plate, the grid ribs of the positive polar plate and the negative polar plate of the polar plate are connected, the connected grid ribs replace the wall-penetrating welding connection mode among the existing single cells, the internal resistance is reduced, and the large-current discharge is facilitated; secondly, a labyrinth is designed in the partition wall of the storage battery to form a bent loop, so that the oxygen movement path can be prolonged, and oxygen recombination of a negative electrode is facilitated.

In some embodiments, the labyrinth structure includes a plurality of guide grooves, and an exhaust structure is disposed between each adjacent guide groove, and the labyrinth structure further includes a control valve for controlling gas to be exhausted from the labyrinth, the control valve being disposed on the guide grooves. Therefore, the oxygen entering the labyrinth is filled into the guide grooves and is discharged into the next guide groove from the previous guide groove through the exhaust structure, the path of the oxygen discharged from the labyrinth is prolonged, the labyrinth is also equivalent to an oxygen buffer area, and the oxygen can escape from the control valve when the oxygen pressure in the labyrinth reaches a certain value.

In some embodiments, the bottom of the labyrinth is provided with a gas channel, which abuts against the partition. The separator is an AGM separator and the acid absorption capacity of the AGM separator is controlled to be below 95%, thereby facilitating oxygen in the AGM separator to enter the gas channel.

In some embodiments, a bottom of one of the guide grooves is provided with a vent structure, and the vent structure is communicated with the gas channel. Therefore, oxygen entering the gas channel can enter the guide groove through the ventilation structure, and the ventilation structure can be a structure which enables oxygen to enter the guide groove from the gas channel through a through hole and the like.

In some embodiments, the housing is provided with a locking groove for fixing the partition wall in a length direction. Therefore, the partition wall is convenient to fix in the shell.

In some embodiments, the partition wall includes clamping strips clamped in the clamping grooves, a gap layer is reserved between the clamping strips, rubber layers are arranged at two ends of the gap layer, and the gap layer is filled with a sealing material. Therefore, 1 pair of clamping strips is placed for each 1 group of positive and negative electrode plates and AGM partition plates, gaps are reserved in the middle of the clamping strips, rubber layers are arranged on the upper and lower portions of the clamping strips and used for compacting grid ribs connected with the positive and negative electrode plates, epoxy resin, sealant or injection molding groove body materials are poured in the middle of the clamping strips for molding, and the compact partition wall is formed after molding.

In some embodiments, the bipolar plate is produced by continuous casting and rolling to obtain two plate grids with the same size, positive and negative lead pastes are respectively coated to obtain the positive and negative plates, and the positive and negative plates are connected through ribs. Specifically, the bipolar plate grid is manufactured by continuous casting and rolling of lead-based tin alloy, lead paste is filled to form a positive plate and a negative plate, lead paste additives are different, the ribs are the same according to different specific gravities, and the lead ribs between the positive plate and the negative plate are connected to form the bipolar plate.

Drawings

FIG. 1 is a schematic diagram of a battery before assembly;

FIG. 2 is a schematic view of a housing;

FIG. 3 is a schematic diagram of a bipolar plate structure;

FIG. 4 is a schematic view of an assembly structure of a bipolar plate and a separator;

FIG. 5 is a schematic view of a labyrinth structure;

FIG. 6 is a schematic view of an assembly structure of the bipolar plate, the partition plate and the partition wall;

FIG. 7 is a schematic sectional view taken along line A-A of the assembled structure of FIG. 6;

fig. 8 is a schematic diagram of the internal structure of a 12V60Ah lead-acid starting battery for a family car.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be noted that, in the specific embodiment, the orientation relationship refers to a relationship between the storage battery and the ground when the storage battery is placed horizontally, for example, the horizontal direction is parallel to the ground, and the vertical direction is perpendicular to the ground.

Example 1

A starting bipolar horizontal lead-acid battery, as shown in figure 1, comprising 6 cells, 6 cells connected in series, comprising a casing 1, bipolar plates 2 placed inside the casing 1, AGM separators 3, partition walls 4 and a labyrinth structure 5, the partition walls 4 separating the battery cells, wherein:

as shown in fig. 2, the casing 1 is a rectangular parallelepiped structure, and has two first side covers 11 disposed in parallel in a width direction by injection molding, two second side covers 12 disposed in parallel in a length direction by injection molding, and a bottom cover (not shown), where the first side cover 11, the second side cover 12, and the bottom cover enclose a space for accommodating the bipolar plate 2, the separator 3, and the partition wall 4; the two second side covers 12 which are arranged in parallel relatively are respectively and correspondingly provided with a clamping groove 13 in the vertical direction, so that the partition wall 4 is vertical to the bottom cover when the partition wall 4 is clamped in the clamping grooves 13; in this embodiment, two reinforcing columns 131 protruding from the inner wall are formed by injection molding in the vertical direction of the inner wall of the second side cover 12, and a space for placing the partition wall 4 is left between the two reinforcing columns 131, thereby forming a structure of the card slot 13; in addition, the structure of the top cover of the housing 1 is the same as that of the prior art, and heat sealing or gluing can be selected according to different materials, which is not described herein again.

As shown in fig. 3, the bipolar plate 2 is manufactured by continuous casting and continuous rolling using lead-based tin alloy, the two obtained plate grids have the same size, the two plate grids are connected through the lead rib 23, and positive lead paste and negative lead paste are respectively coated to form the positive plate 21 and the negative plate 22, that is, the positive plate grid and the negative plate grid are connected through the lead rib 23, the connected plate grid rib 23 replaces the existing wall-penetrating welding connection mode between the cells, the internal resistance is reduced, and the large-current discharge is facilitated;

as shown in fig. 4 and 7, the AGM separators 3 and the bipolar plates 2 are sequentially and alternately stacked horizontally, where the sequential and alternate horizontal stacking means that the left end of the upper layer is a negative plate, the right end is a right plate, the middle layer is the AGM separator 3, the left end of the lower layer is a right plate, and the right end is a negative plate, that is, the upper layer and the lower layer of the AGM separator 3 are positive and negative plates; here, the width of the AGM separator 3 is larger than the width of the positive or negative electrode plate so that an extension 31 of the AGM separator 3 exists with respect to the positive or negative electrode plate at the ribs 23.

As shown in fig. 5, the labyrinth structure 5 includes guide grooves 51 connected in sequence, and the guide grooves 51 have a gas storage space for serving as a buffer area for oxygen, and are respectively arranged as first to fifth guide grooves from left to right in the orientation shown in fig. 5; a partition wall 511 is arranged between each two adjacent guiding grooves 51, and an exhaust structure 52 is arranged on the partition wall 511, in this embodiment, the exhaust structure 52 is a through hole, and the exhaust structures 52 are distributed up and down on the adjacent partition walls 511, that is, the exhaust structure 52 is distributed on the top end of the upper partition wall 511, and then is distributed on the bottom end of the lower partition wall 511, so that each guiding groove 51 can buffer oxygen, and a zigzag oxygen passage loop is formed inside the labyrinth structure;

the labyrinth structure 5 further comprises a control valve 53 for controlling oxygen to be discharged out of the labyrinth, the control valve 53 is arranged at the top of the fifth guide groove, and when the pressure of the oxygen in the labyrinth reaches a certain value, the oxygen can escape from the control valve 53 into the shell to participate in oxygen recombination of the negative plate;

specifically, when the battery is charged, the positive electrode can evolve oxygen and the negative electrode can evolve hydrogen, the oxygen evolution of the positive electrode is started when the charging amount reaches 70%, the bipolar sealed lead-acid battery of the embodiment adopts an AGM separator lean solution design, 5% -10% of pores in the separator are kept not occupied by electrolyte, and the oxygen generated by the positive electrode reaches the negative electrode through the pores and is absorbed by the negative electrode. The oxygen precipitated reaches the negative electrode, and reacts with the negative electrode as follows: 2Pb + O₂＝2PbO；2PbO+2H₂SO₄＝2PbSO₄+2H₂And O. Through the two reactions, the purpose of cathode absorption is achieved. The hydrogen evolution of the cathode starts when the charging reaches 90%, the reduction of oxygen on the cathode and the hydrogen evolution overpotential of the cathode are improved, thereby avoiding a large amount of hydrogen evolution reaction.

The unreacted oxygen and the precipitated hydrogen in the storage battery are accumulated to increase the pressure in the battery, and when the gas pressure in the battery reaches a certain value (such as 10-25KPa in the embodiment), the closed valve can be automatically opened to exhaust and release the pressure; the internal pressure of the accumulator drops, and when the pressure drops to a certain limit value (3-15 KPa in the embodiment), the sealing valve is automatically closed, thereby meeting the technical performance requirement of the accumulator.

The labyrinth structure 5 is further provided with a gas channel 6 at the bottom, the gas channel 6 abuts against the AGM partition plate 3, a ventilation structure 54 is arranged at the bottom of the first guide groove, the ventilation structure 54 is communicated with the gas channel 6, and in the embodiment, the ventilation structure 54 is a through hole. Therefore, after the assembly of the storage battery is completed, the AGM separator 3 abuts against the gas channel 6, oxygen in the AGM separator 3 flows into the first guide groove of the labyrinth structure 5 through the vent structure 54 in the gas channel 6 after escaping, and then flows to the second to fifth guide grooves in sequence through the exhaust structure 52, and when the oxygen pressure in the labyrinth structure 5 reaches a certain degree, the oxygen can escape from the control valve 53 and enter the storage battery shell 1.

Fig. 6-7 are schematic views showing the assembly structure of the bipolar plate 2, the AGM separator 3, the partition wall 4 and the labyrinth 5, wherein the first bipolar plate is arranged at the bottom in sequence from bottom to top, the left end of the first bipolar plate is a first negative plate 22, the right end of the first bipolar plate is a first positive plate 21, and the middle of the first bipolar plate is a first rib 23 connecting the first negative plate 22 and the first positive plate 21; secondly, the AGM separators 3 respectively press the first bipolar plate, the first positive plate 21 and the first negative plate 22, and the AGM separators 3 are respectively arranged at two sides of the partition wall 4; a second bipolar polar plate is arranged on the partition wall 4, and the left end of the second bipolar polar plate is a second positive polar plate 21 'and the right end of the second bipolar polar plate is a second negative polar plate 22'; the bottom of the separator 3 is provided with a rubber layer 43 for compacting the first ribs 23 connected with the positive and negative plates, the separator 3 is provided with a clamping strip 41, the bottom of the clamping strip 41 is clamped between the two AGM separators 3, a gap layer (not marked, namely a space filled with epoxy resin 44) is reserved in the middle of the clamping strip 41, the epoxy resin 44 is filled in the gap layer to form a compact separator, and then the top of the separator is capped by the rubber layer.

Lean against the card strip 41 both sides facade and be equipped with labyrinth 5 respectively, labyrinth 5's outer wall downwardly extending forms gas passage 6 at its bottom, and gas passage 6 offsets with the extension 31 of AGM baffle 3 for oxygen in the AGM baffle 3 spreads to gas passage 6 in, then gets into labyrinth 5, because formed in labyrinth 5 and bent the return circuit and prolonged the route that oxygen discharged labyrinth 5, plays the buffer memory effect to oxygen, is convenient for oxygen and negative pole to carry out the oxygen complex.

The invention relates to an assembly process of a bipolar horizontal lead-acid storage battery for starting, which comprises the following steps:

(1) when the shell is formed in an injection molding mode, partition walls among the single lattices are omitted, and clamping grooves are reserved;

(2) 1 clamping strip is placed in each assembly of 1 group of positive and negative electrode plates and the AGM separator, a gap layer is reserved in the middle of each clamping strip, rubber layers are arranged on the upper portion and the lower portion of each clamping strip and used for compacting grid ribs connected with the positive and negative electrode plates, epoxy resin is poured into the gap layers in the clamping strips for forming, and a compact partition wall is formed after forming;

(3) the positive electrode grid ribs of each group of single cells are cast and welded together to form the positive electrode of the whole cell, and the negative electrode grid ribs are cast and welded together to form the negative electrode of the whole cell;

(4) the two end parts of the whole storage battery are sealed with concave end covers;

(5) the structure of the middle cover and the top cover is the same as that of the existing storage battery, and the assembly method is also the same as that of the prior art.

The 1 positive plate and 1 negative plate (separated by the middle AGM separator to prevent short circuit) form 1 single 2V battery, the capacity is determined by the mass of the lead paste active material, the discharge capacity of the lead-acid storage battery for starting is 20 hours, the lead-acid storage battery discharges to the ampere hour of 1.75V of the single, the general electrode plate design is about 15Ah, the two groups are connected in parallel for 30Ah, and the like. For example, as shown in fig. 8, which shows a schematic diagram of four parallel structures, if a group of 15Ah, the battery capacity can be calculated to be 60 Ah; the lead-acid starting storage battery for the family car is connected in series by 6 monomers, namely 12V, shown as 12V60Ah, and is generally suitable for the family car.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.