CN201146212Y - A lead-acid battery - Google Patents

Abstract

The utility model discloses a lead-acid accumulator. The lead-acid accumulator is provided with a single battery inside. The single battery is provided with a positive electrode bus bar and a negative electrode bus bar. The positive electrode bus bar and the negative electrode bus bar are provided with An automatic temperature-controlled liquid replenishment device, the automatic temperature-controlled liquid replenishment device includes a heat-shrinkable bag, a pressure limiting valve, and an electrolyte canned in the heat-shrinkable bag, and the pressure-limiting valve is set at the bottom of the heat-shrinkable bag and is located at the positive busbar and the negative busbar between rows. Through the built-in automatic temperature control liquid replenishment device, the heat shrinkable bag shrinks and squeezes to release the electrolyte for replenishment under heated conditions, and automatically judges when to add electrolyte and the amount of replenishment, thereby effectively preventing thermal runaway of the battery. Avoid deformation caused by heat, automatic liquid replenishment maintenance, prolong battery life.

Description

A lead-acid battery

technical field

The utility model relates to a lead-acid storage battery.

Background technique

Valve-regulated sealed lead-acid batteries will have electrolyte side reactions during use, so the electrolyte in the battery will become less and less, which will affect the service life of the battery. After the battery loses fluid, the oxygen circulation capacity in the battery will be strengthened. When working, the battery will produce thermal runaway phenomenon, which will cause the battery to heat up, deform, etc., causing the battery to be scrapped. It is difficult to judge the amount of liquid lost during the use of the battery. If the electrolyte is replenished when the battery loses a small amount of liquid, it will cause battery leakage, decrease in charge acceptance, and battery voltage and capacity reduction. Thereby the prior art is difficult to correctly judge whether storage battery can add liquid and the amount of liquid addition, brings inconvenience to the maintenance of storage battery, has a strong impact on the service life of lead-acid storage battery.

Utility model content

The technical problem to be solved by the utility model is to provide a lead-acid storage battery, which can accurately judge whether the storage battery needs to replenish electrolyte, and replenish a proper amount of electrolyte in time.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: the lead-acid storage battery is provided with a single battery inside, and the positive bus bar and the negative bus bar are arranged in the single battery, and the positive bus bar and the negative bus bar are An automatic temperature-controlled liquid replenishment device is provided on the top, and the automatic temperature-controlled liquid replenishment device includes a heat-shrinkable bag, a pressure limiting valve, and electrolyte canned in the heat-shrinkable bag. The pressure-limiting valve is set at the bottom of the heat-shrinkable bag and is located and the negative busbar.

The utility model adopts the above-mentioned technical scheme, and through the built-in automatic temperature control liquid replenishing device, the heat-shrinkable bag shrinks and squeezes to release the electrolyte for supplement under the condition of heat, and automatically judges when to add the electrolyte and the amount of supplement, so that it is effective Prevent thermal runaway of the battery, avoid deformation caused by heat, and automatically refill and maintain the battery to prolong the service life of the battery.

Description of drawings

The utility model is further specifically described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural schematic diagram of a lead-acid storage battery of the present invention.

Detailed ways

As shown in Figure 1, a plurality of single cells are arranged inside the sealed casing 7 of the lead-acid battery, and each single cell includes a positive bus bar 1 and a negative bus bar 2, and a positive bus bar 1 and a negative bus bar 2 There is a large space between the positive busbar 1 and the negative busbar 2, and an automatic temperature-controlled fluid replacement device is installed on the positive electrode bus bar 1 and the negative electrode bus bar 2, so the automatic temperature-controlled fluid replacement device is located inside the space, and the automatic temperature-controlled fluid replenishment device includes The heat shrinkable bag 3 , the pressure limiting valve 4 and the electrolyte 5 canned in the heat shrinkable bag 3 , the pressure limiting valve 4 is arranged at the bottom of the heat shrinkable bag 3 and between the positive busbar 1 and the negative busbar 2 . After the battery has been used for a certain period of time, the electrolyte inside it will gradually decrease, and the temperature of the battery will gradually rise when it is working, so that the temperature of the automatic temperature control liquid replenishment device will also rise. The shrink bag 3 will shrink when heated, the higher the temperature is, the greater the shrinkage will be, and the shrinkage will cause the pressure to increase. The electrolyte 5 flows to the pole group 6 and is absorbed by the battery separator and the pole plate. The temperature at this time is the judgment temperature for the opening of the automatic temperature control liquid replenishment device. By selecting the appropriate heat shrinkable material and the appropriate pressure limiting valve The opening pressure can control the opening temperature, so the automatic temperature control liquid replenishment device can automatically and accurately judge whether the battery needs to be replenished with electrolyte, and replenish an appropriate amount of electrolyte in time to achieve the purpose of replenishing electrolyte, thereby effectively preventing the occurrence of thermal runaway of the battery.

Claims (1)

1, a kind of lead acid accumulator, its inside is provided with cell, be provided with positive bus (1) and negative bus-bar (2) in the described cell, it is characterized in that: described positive bus (1) and negative bus-bar (2) are provided with automatic temperature-controlled liquid supply device, described automatic temperature-controlled liquid supply device comprises pyrocondensation bag (3), pressure limiting valve (4) and is potted in the interior electrolyte (5) of pyrocondensation bag (3) that pressure limiting valve (4) is arranged on pyrocondensation bag (3) bottom and is positioned between positive bus (1) and the negative bus-bar (2).

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