CN213026408U

CN213026408U - Device capable of effectively preventing storage battery short circuit caused by grid creep

Info

Publication number: CN213026408U
Application number: CN202021365298.3U
Authority: CN
Inventors: 朱志允; 刘超; 赵青; 余杰
Original assignee: Chaowei Power Group Co Ltd
Current assignee: Chaowei Power Group Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-04-20
Anticipated expiration: 2030-07-13

Abstract

The utility model discloses a can effectively prevent to arouse device of battery short circuit because of grid creep, including positive grid, negative grid, baffle, positive busbar and negative busbar, there is the negative pole space under the negative busbar between bottom surface and the positive plate bars top edge, there is the positive space under the positive busbar between bottom surface and the negative plate bars top edge, is equipped with the insulation in negative pole space or the positive space in at least one space and cuts off. The utility model discloses isolated electrode grid tray and busbar from the physical space with the method that sets up insulating wall, thereby prevented both mutual contacts the risk of having avoided the short circuit inefficacy.

Description

Device capable of effectively preventing storage battery short circuit caused by grid creep

Technical Field

The utility model relates to an insulating device especially relates to a can effectively prevent to arouse device of battery short circuit because of grid creep.

Background

At present, the electric bicycle, the electric motorcycle and the low-speed electric automobile develop very rapidly, the used storage battery is a lead storage battery basically, the lead storage battery generally comprises a positive plate grid, a negative plate grid, a partition plate, a positive bus bar, a negative bus bar and the like, the positive plate grid and the negative plate grid are mutually embedded, and the partition plate is inserted in the middle. All positive grid plates are lapped on the positive bus bar, and all negative grid plates are lapped on the negative bus bar. More importantly, in order to prevent electrolyte stratification, a clamping force is generally applied to the positive grid, the separator and the negative grid.

Although the current cycle life of the battery can meet the use requirements of people, the design life of the battery does not meet the requirements of storage battery manufacturers, and most of the batteries with the end-of-life return are subjected to junction dissection analysis, because the upper edge of a grid alloy caused by the creep length is higher than the upper edge of a partition plate, even the grid length is higher than the negative bus bar, and the creep is caused by the clamping force caused by the short circuit of the battery due to the lap joint of the grid alloy and the negative bus bar, so that the battery fails. Through analyzing the phenomena, the device for preventing the grid from increasing is specially designed to achieve the purpose of preventing the grid from increasing.

For example, a chinese patent document discloses "a battery electrode group and a lead battery resistant to electrolyte stratification", which is disclosed in the publication No. 110707368, and includes positive plates, negative plates arranged at intervals and a separator for separating the positive plates from the negative plates, wherein a tab is provided at a top end of the positive plate, the positive plate is divided into a plurality of sections in a vertical direction, an extrusion member is provided between two adjacent sections, the extrusion member includes two extrusion strips disposed at both sides of the positive plate, one of the extrusion strips is provided with a connection post penetrating the positive plate, the other extrusion strip is provided with a connection hole matched with the connection post, and one side of the extrusion member contacting the separator is provided with a protruding strip for extruding the separator during assembly.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome prior art's grid because the clamp force creep is long high, lead to the problem that the short circuit became invalid with the busbar overlap joint, provide one kind can effectively prevent to arouse the device of battery short circuit because of the grid creep, prevent that the grid creep from arousing the battery short circuit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the device capable of effectively preventing the storage battery from short circuit caused by grid creep comprises a positive grid, a negative grid, a partition plate, a positive busbar and a negative busbar and is characterized in that a negative gap exists between the lower bottom surface of the negative busbar and the upper edge of the positive grid, a positive gap exists between the lower bottom surface of the positive busbar and the upper edge of the negative grid, and an insulating partition is arranged in at least one of the negative gap and the positive gap.

In the lead storage battery in the prior art, in order to prevent the electrolyte from layering caused by the layering of the electrolyte, the sulfuric acid concentration at the lower part of the battery is higher than that at the upper part due to the layering of the electrolyte, and in the discharging process of the battery, the discharging amount at the lower part of an electrode grid plate is larger, the charging acceptance is poor, the discharging depth is deeper, and the service life of the battery is not facilitated; the upper part of the electrode grid has shallow discharge depth and good charge acceptance; the upper and lower differences result in a reduction in the overall performance and life of the battery.

In order to alleviate the effects of electrolyte stratification, a clamping force is typically applied to the stacked positive and negative electrode grids and separators. But this clamping force causes another problem: creep. Creep is the phenomenon in which the strain of a solid material increases with time while maintaining a constant stress. It is distinguished from plastic deformation, which generally occurs after stresses exceed the elastic limit, and creep, which occurs when stresses are less than the elastic limit, as long as the stresses are applied for a relatively long time. Many materials (e.g., metals, plastics, rock, and ice) exhibit creep properties under certain conditions. Due to creep, the stress state of a material at a certain instant is generally related not only to the instant deformation, but also to the deformation process prior to the instant. Creep is a concern for many engineering problems.

Generally, the positive grid plate and the negative grid plate of the lead storage battery have different thicknesses, and the applied clamping force easily causes the thicker grid plate to creep and grow, and even finally is lapped on the bus bars with different polarities to cause short circuit. Therefore, the insulating partition arranged at the gap between the electrode grid plate and the bus bar can effectively prevent short circuit failure caused by creep length.

Preferably, the positive electrode gap has a plurality of positions, each positive electrode gap is provided with an insulating partition, and the plurality of insulating partitions are connected into a whole.

Preferably, the negative electrode gap has a plurality of positions, each negative electrode gap is provided with an insulating partition, and the plurality of insulating partitions are connected into a whole.

A plurality of insulation partitions are connected into a whole, and the insulation partitions can be plugged and pulled simultaneously, so that the installation and maintenance are convenient, and meanwhile, the insulation partitions can be integrally formed during manufacturing, and the cost is reduced.

Preferably, the upper surface of the insulating partition is provided with a limiting block, and the limiting block is used for being matched with the negative bus bar or the positive bus bar so as to limit the insulating partition.

The limiting block is arranged to prevent the insulation partition from being excessively inserted and interfering with other components to cause damage to parts.

Preferably, a push-pull bump is arranged at one end of the insulating partition, which is far away from the negative bus bar or the positive bus bar.

The push-pull lug can be used as an acting point when the work is received and disassembled, so that the disassembly and assembly operation is convenient.

Preferably, the material of the insulation partition is plastic.

Preferably, the plastic is ABS.

The plastic ABS has good electrical insulation, is hardly influenced by temperature, humidity and frequency, can be used in most environments, is not influenced by water, inorganic salt, alkali and various acids, and is an ideal material for insulation.

Therefore, the utility model discloses following beneficial effect has: (1) short circuit failure due to creep can be prevented.

Drawings

FIG. 1 is a prior art schematic of the present invention;

FIG. 2 is a schematic structural view of the insulation partition of the present invention;

fig. 3 is a schematic structural view of an assembled state of the present invention;

fig. 4 is a schematic structural view of the present invention, in an assembled state, with the negative bus bar hidden;

in the figure: 1. the device comprises a positive grid plate 2, a negative grid plate 3, a partition plate 4, a positive bus bar 5, a negative bus bar 6, a positive gap 7, a negative gap 8, an insulating partition 9, a limiting block 10 and a push-pull lug.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Embodiment 1, as shown in fig. 1, 2, 3, and 4, a device for effectively preventing a battery from short-circuiting due to grid creep, includes:

the battery comprises a positive grid 1, a negative grid 2, a partition plate 3, a positive bus bar 4 and a negative bus bar 5, and is characterized in that a negative gap 7 exists between the lower bottom surface of the negative bus bar 5 and the upper edge of the positive grid 1, a positive gap 6 exists between the lower bottom surface of the positive bus bar 4 and the upper edge of the negative grid 2, and an insulating partition 8 is arranged in at least one of the negative gap 7 or the positive gap 6.

In this embodiment, the thickness of the positive grid plate 1 is greater than that of the negative grid plate 2, and the number of the positive grid plate 1 and the number of the negative grid plate 2 are 4, so that the insulating partition 8 is arranged at the negative gap 7 between the negative bus bar 5 and the positive grid plate 1.

Furthermore, the positive pole gap 6 is provided with a plurality of positions, each positive pole gap 6 is provided with an insulating partition 8, and the plurality of insulating partitions 8 are connected into a whole.

Furthermore, the negative electrode gap 7 is provided with a plurality of positions, each negative electrode gap 7 is provided with an insulating partition, and a plurality of insulating partitions 8 are connected into a whole.

In this embodiment, since the creep length is generally the positive grid 1, the creep length is set in the negative gap 7 between the bottom of the negative bus bar 5 and the positive grid 1, and since there are 4 negative gaps 7, 4 insulating partitions 8 are connected into a whole, and for the convenience of insertion, a chamfer is set in the front end insertion direction.

Furthermore, the upper surface of the insulating partition 8 is provided with a limiting block 9, and the limiting block 9 is used for being matched with the negative bus bar 2 or the positive bus bar 1 so as to limit the insulating partition 8. The limiting blocks 9 are arranged on the edges of the two sides of the whole insulating partition 8, the distance span is large, and the contact surface is stable.

Furthermore, a push-pull bump 10 is arranged at one end of the insulating partition 8, which is far away from the negative bus bar 5 or the positive bus bar 4. The push-pull projection 10 is a small raised step, and a chamfer is arranged at the finger contact part to prevent the sharp corner from scratching a human body.

Further, the material of the insulating partition 8 is plastic.

Further, the plastic is ABS. The plastic ABS has good electrical insulation property, is hardly influenced by temperature, humidity and frequency, can be used in most environments, is not influenced by water, inorganic salt, alkali and various acids, is an ideal material for insulation and partition, is easy to open a die, and has extremely low large-scale production cost.

Claims

1. The device capable of effectively preventing the storage battery from short circuit caused by grid creep comprises a positive grid, a negative grid, a partition plate, a positive busbar and a negative busbar and is characterized in that a negative gap exists between the lower bottom surface of the negative busbar and the upper edge of the positive grid, a positive gap exists between the lower bottom surface of the positive busbar and the upper edge of the negative grid, and an insulating partition is arranged in at least one of the negative gap and the positive gap.

2. The device of claim 1, wherein there are multiple positive electrode gaps, each positive electrode gap has an insulation partition, and the multiple insulation partitions are connected into a whole.

3. The device of claim 1, wherein the negative electrode gap has a plurality of positions, each negative electrode gap has an insulation partition, and the plurality of insulation partitions are connected into a whole.

4. The device for effectively preventing the short circuit of the storage battery caused by the creep of the grid as claimed in claim 1, 2 or 3, wherein the upper surface of the insulation partition is provided with a limiting block, and the limiting block is used for being matched with the negative bus bar or the positive bus bar so as to limit the insulation partition.

5. The device for effectively preventing the short circuit of the storage battery caused by the creep deformation of the grid as claimed in claim 4, wherein the end of the insulation partition away from the negative bus bar or the positive bus bar is provided with a push-pull lug.

6. The device of claim 5 wherein the insulation barrier is made of plastic.

7. The device of claim 6 wherein the plastic is ABS.