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Storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge

A technology of discharge testing and intelligent monitoring, which is applied in the direction of automatically disconnected emergency protection devices, measuring devices, circuit devices, etc., can solve problems such as high cost, high technical requirements, and inability to accurately judge the state of the battery, so as to improve reliability Effect

Inactive Publication Date: 2014-05-07
王晓秋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the currently known off-line (battery and charger disconnected) or online (battery and charger closed) battery monitoring and maintenance devices judge the state of the battery by measuring the voltage and internal resistance of the battery, but when the battery In the floating charge state and due to the non-linear characteristics of the internal resistance of the battery, it is sometimes impossible to accurately judge the state of the battery only based on the results of measuring the real-time voltage and internal resistance of the battery, and the technical requirements for measuring the internal resistance of the battery are higher than measuring the voltage, so The cost of the battery monitoring device with internal resistance measurement function is relatively high; while the current existing device that judges the state of the battery by testing the end-of-discharge voltage of the battery through load discharge, the working power of the internal control circuit is powered by the battery itself. When the smart storage battery equipped with this device is installed in a power system with advanced battery management (ABM) function, such as some uninterruptible power supply systems (UPS), the storage battery works in the state of long-term low-current discharge most of the time, which will cause Affect the life of the battery; in addition, there is no over-temperature protection device in the discharge circuit of the existing smart battery. When the electronic switching device in the discharge circuit is out of control, it will bring disastrous consequences to the battery power supply system.

Method used

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  • Storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge
  • Storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge
  • Storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge

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Experimental program
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Embodiment 2

[0024] This embodiment is a solution for measuring battery voltage, end-of-load discharge voltage and load discharge current

[0025] Figure 4 is the main circuit of this embodiment.

[0026] figure 2 It is the working power supply circuit of the processor control circuit.

[0027] image 3 It is externally powered, has two identical RS485 communication interface circuits that are isolated from the main circuit.

[0028] The "operating power supply circuit of the processor control circuit" and the "externally powered, two identical RS485 communication interface circuits" of this embodiment are the same as those of the first embodiment.

specific Embodiment approach

[0029] Figure 4 In the box, there is a control circuit with a processor as the core and an A / D converter in the device; BATTERY is the battery to be tested, the grid G ​​of the power electronic switch tube M is connected to the control circuit, and its drain terminal D One end of the load resistor R1 is connected in series, the other end of the load resistor R1 is connected to one end of the over-temperature protection device TP, and the other end is connected to the positive pole P of the battery, and the source end E of the power electronic switch tube M is connected to the current sampling resistor R4 One end of the current sampling resistor R4 is connected to the negative pole N of the storage battery. The voltage on R4 is filtered by C3 and sent to a port of the A / D converter. The current sampling resistor R4, the filter capacitor C3 and the A / D converter A discharge current detection circuit is formed; capacitor C1 is a absorbing protection capacitor connected to both e...

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Abstract

This invention discloses a storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge, which can perform testing on the voltage, final discharging voltage and discharging current on the storage battery under an online or offline state. A control power supply circuit of the storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge consists of a power supply circuit for self power supply of the storage battery and an external power supply circuit possessing a preferred power supply function. The storage battery intelligent monitoring and maintenance apparatus with functions of testing voltage and load discharge is serially connected to an over-temperature protection member. When a switch member in a discharging circuit is out of control and the discharging load exceeds the tolerant temperature value of the over-temperature protection member, the over-temperature protection member cuts off the discharging circuit.

Description

Technical field [0001] The invention relates to a storage battery monitoring and maintenance device with voltage and load discharge testing functions, especially capable of testing the voltage, load discharge end voltage and discharge current of the storage battery when the storage battery is offline or online. Background technique [0002] Most of the currently known off-line (battery and charger disconnected) or online (battery and charger closed) battery monitoring and maintenance devices judge the state of the battery by measuring the voltage and internal resistance of the battery, but when the battery In the floating charge state and due to the non-linear characteristics of the internal resistance of the battery, it is sometimes impossible to accurately judge the state of the battery only based on the results of measuring the real-time voltage and internal resistance of the battery, and the technical requirements for measuring the internal resistance of the battery are h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCH02H5/042G01R31/3842
Inventor 王晓秋
Owner 王晓秋