Online real-time battery monitoring device

Abstract

The invention provides an online real-time battery monitoring device. The monitoring device comprises a battery monitoring module, a sampling resistor and a fixing device. The online real-time battery monitoring device is characterized in that 1) the battery monitoring module comprises a current detection module; 2) and the fixing device comprises a load end connecting plate and a battery end connecting plate which are made of metal material, the two ends of the sampling resistor are respectively connected with one end of the load end connecting plate and one end of the battery end connecting plate, the other end of the battery end connecting plate is connected on a battery output terminal, and the other end of the load end connecting plate is connected with one end of a load circuit. The detection end of the current detection module is directly connected with the sampling resistor.

Description

technical field [0001] The invention relates to a device for testing the electrical condition of a storage battery, especially for testing capacity or state of charge. Background technique [0002] In the pitch control system of wind turbines, the backup battery plays a role in protecting the wind turbine from feathering in time when the power grid fails. However, at the wind power operation site, due to inaccurate battery status detection, battery power loss cannot be captured in time, and the Make the fan unit in a dangerous state and cause major accidents. Therefore, in actual use, it is often necessary to replace the battery pack in advance, which increases the use cost of wind power generation. [0003] The battery monitoring system of the existing wind power pitch backup battery pack is a separate type, that is, the battery pack and the battery monitoring device are placed separately, and the two are connected through a long wire harness. At this time, the battery mo...

AI Technical Summary

Problems solved by technology

At this time, the battery monitoring device needs to be connected to the sampling resistor through a long wire harness to collect the system current value. Due to the influence of the wire harness, this method can only detect the discharge current of the battery when the pitch motor is working and predict the battery status accordingly, but cannot detect The milliampere-level current in standby state (mainly the leakage current of the inverter)

As far as the whole system is concerned, although the current in the standby state is very small, because the whole system is in the standby state most of the time, the existing battery monitoring system does not calculate the battery state of charge accurately, and cannot realize online real-time monitoring of the battery state.

Similar problems also exist in other workplaces where batteries are used. In the prior art, in order to accurately monitor the state of the battery, the relevant parameters have to be obtained through transient discharge of the battery, which will not only cause additional loss of the battery, but also due to the need Adding equipment increases the cost and reduces the overall reliability of the system

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