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Lithium battery charging and discharging management circuit and lithium battery management system

A charge and discharge management, lithium battery technology, applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problem of unable to start the capacitive load of capacitance value normally, and achieve the effect of avoiding false triggering of short circuit protection

Active Publication Date: 2016-02-03
绍兴蓝之印家纺有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium battery charge and discharge management circuit, aiming to solve the problem that the existing lithium battery management system cannot normally start the capacitive load with a large capacitance value

Method used

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  • Lithium battery charging and discharging management circuit and lithium battery management system
  • Lithium battery charging and discharging management circuit and lithium battery management system
  • Lithium battery charging and discharging management circuit and lithium battery management system

Examples

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Embodiment 1

[0022] figure 1 The module structure of the lithium battery charging and discharging management circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0023] The lithium battery charge and discharge management circuit provided in this embodiment is connected to the capacitive load 10, including a lithium battery 20, a control module 30, a main switch module 40, a sampling resistor 60, and a short circuit detection module 70; the voltage detection terminal of the control module 30 is connected to the The input terminal of the capacitive load 10 is connected to the positive pole of the lithium battery 20 in common, and the 60 second end of the sampling resistor is connected to the negative pole of the lithium battery 20; the input terminal and the output terminal of the short circuit detection module 70 are respectively connected to the f...

Embodiment 2

[0049] The implementation of this embodiment is based on the first embodiment.

[0050] Figure 6 The module structure of the lithium battery charging and discharging management circuit provided by the second embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0051] In this embodiment, the lithium battery charging and discharging management circuit may also include a charging switch module 80;

[0052] The input terminal of the charging switch module 80 is connected to the charging current, the output terminal of the charging switch module 80 is connected to the power supply terminal of the lithium battery 20 , and the controlled terminal of the charging switch module 80 is connected to the third control terminal of the control module 30 .

[0053] In this embodiment, the control module 30 can disconnect the main switch module 40 and the current limiting switc...

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Abstract

The invention belongs to the technical field of power supplies and particularly relates to a lithium battery charging or discharging management circuit and a lithium battery management system. The lithium battery charging or discharging management circuit comprises a lithium battery, a control module, a main switch module, a limiting switch module, a sampling resistor and a short-circuit detection module. The main switch module and the limiting switch module are jointly connected to the output end of a capacitive load, and the input end of the capacitive load is connected with the positive electrode of the lithium battery. The main switch module, the limiting switch module and the short-circuit detection module are jointly connected to the first end of the sampling resistor, and the second end of the sampling resistor is connected with the negative electrode of the lithium battery; the control module is connected with the main switch module, the limiting switch module, the lithium battery and the short-circuit detection module to carry out detection or control. Because the switch-on and switch-off of the main switch module and the switch-on and switch-off of the limiting switch module can be controlled by the control module according to the state of a circuit, false triggering of short-circuit protection is avoided, and a capacitive load with a large capacitance value can be switched on normally.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a lithium battery charging and discharging management circuit and a lithium battery management system. Background technique [0002] As the power lithium battery production technology becomes more and more mature, its application as a power source in power tools, uninterruptible power supplies, and new energy sources is increasing. Lithium battery charge and discharge management circuit is a management circuit used in the lithium battery management system to monitor and manage the charging and discharging of lithium batteries. It also provides overvoltage protection, overcurrent protection, temperature protection, short circuit protection, and battery equalization for lithium batteries. Etc., to ensure the safe use of lithium batteries, is an indispensable part of the lithium battery management system. [0003] However, in the research and development of lithi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 商洪亮马化盛张彩辉江钦彬李威
Owner 绍兴蓝之印家纺有限公司
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