Automatic bridging device for preventing open circuit of storage battery

Abstract

The invention discloses an automatic bridging device for preventing an open circuit of a storage battery. The automatic bridging device comprises a bridging module, a first wiring terminal, a second wiring terminal and a shell, wherein the bridging module is arranged inside the shell; the first wiring terminal and the second wiring terminal are fixedly arranged on the shell; the bridging module comprises a fuse, a high-power and low-power-consumption surface contact type diode and a CPU (Central Processing Unit) control panel; the CPU control panel is externally connected with a 12V direct-current power supply and is further connected with a normal work indicating lamp, a fan, a relay signal contact point and a warning indicating lamp; when the storage battery normally discharges electriccharges, the normal work indicating lamp is lighted; when the open circuit appears, the warning indicating lamp is lighted; and the location is immediately indicated and a warning signal is uploaded in time through the relay signal contact point. The automatic bridging device is small in size, is used for monitoring the storage battery in real time, is used for realizing seamless bridging, is usedfor realizing the self detection abnormity warning of the device, the open-circuit warning of the storage battery and the omnibearing abnormality warning of a voltage off-limit warning lamp of the storage battery, and meanwhile, has the remote transmission capacity of the warning signal.

Description

technical field [0001] The invention relates to the technical field of battery monitoring, in particular to an automatic jumper device for preventing battery open circuit. Background technique [0002] Valve-regulated lead-acid batteries are widely used as emergency backup power supplies in DC operating power supplies, communication power supplies, and uninterruptible power supply lighting equipment because of their safety and stability, small footprint, and no liquid addition. In order to ensure voltage and capacity At the same time to meet the requirements of each subsystem, valve-regulated lead-acid batteries are connected in series to form battery packs. Continuous discharge leads to accelerated deterioration of performance, open circuit of the battery, loss of power supply capacity of the battery pack, and the occurrence of DC power loss accidents. [0003] When the internal resistance of the battery increases, the state of the battery during floating charging is often...

AI Technical Summary

Problems solved by technology

[0002] Valve-regulated lead-acid batteries are widely used as emergency backup power supplies in DC operating power supplies, communication power supplies, and uninterruptible power supply lighting equipment because of their safety and stability, small footprint, and no liquid addition. In order to ensure voltage and capacity At the same time to meet the requirements of each subsystem, valve-regulated lead-acid batteries are connected in series to form battery packs. Continuous discharge leads to accelerated deterioration of performance, open circuit of the battery, loss of power supply capability of the battery pack, and DC power loss accidents

[0003] When the internal resistance of the battery increases, the state of the battery during floating charging is often a slightly higher voltage value, but the high voltage of the battery may also be caused by overcharging, and the probability of high voltage caused by overcharging is far greater than that of the internal resistance value. The probability of high voltage caused by large voltage, so it is difficult to find the problem only from the voltage, and the internal resistance test in the current detection equipment can not detect the state of the current internal resistance value of each battery, and can only give early warning to the battery whose performance is gradually degraded The effect is that it is impossible to provide timely and effective early warning for the battery whose performance suddenly drops, and the most serious thing is that once the AC power failure occurs at this time, the battery will not be able to provide normal power supply for a long time, resulting in a DC accident. It can be seen that the existing general testing equipment It is impossible to effectively warn the failure of the battery whose performance suddenly drops.

[0004] With the improvement of intelligence in transmission substations, especially unattended substations that have appeared in recent years, all measurement and control devices, various protection devices and communication devices are powered by DC, and the battery pack is particularly important as the core of DC power supply. The battery pack of the substation DC system is composed of multiple single cells connected in series. During the long-term working process, the battery pack will gradually fail due to various physical and chemical reaction factors. This failure process is different for each battery. The possible battery capacity It is less than 30%, while the capacity of other batteries is more than 90%, and some batteries are even directly open, and the failure of a single battery leads to the failure of the entire battery pack

When an abnormal situation occurs in the station and the battery needs to be powered, the entire battery pack cannot be discharged due to individual batteries, causing the protection device to fail to work, which may cause a major accident. Based on the above reasons, an automatic jumper to prevent battery open circuit is developed device to avoid accidents in which the entire battery pack fails due to failure of a single battery in the battery pack

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