Active balancing circuit
An active equalization and circuit technology, applied in the direction of charge equalization circuit, circuit device, battery circuit device, etc., can solve problems such as battery short circuit, logic control terminal misoperation, circuit hazard, etc., and achieve the effect of preventing short circuit and preventing misoperation
Inactive Publication Date: 2017-11-28
HUIZHOU BNET TECH CO LTD
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- Application Information
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Problems solved by technology
However, this switch array circuit has a great risk. The logic control terminal that controls the switch components may malfunction, causing the switches that do not need to be turned on to be turned on.
As long as there are 3 or more switches turned on, it will cause a short circuit of one or more batteries, which is extremely harmful to the circuit.
Method used
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[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative pur...
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The invention provides an active balancing circuit. The circuit comprises n single cells, n+1 switch modules, a charging / discharging switching module and a control module. The positive electrode of each single cell is connected with the input end of the charging / discharging switching module through a switch module. The negative electrode of each single cell is connected with the input end of the charging / discharging switching module through a switch module. The output end of the charging / discharging switching module is connected with a charging power supply / discharging load. The control end of the charging / discharging switching module is connected with a charging / discharging switching control end of the control module, and carries out switching of charging balancing and discharging balancing according to voltage of the single cells. The first input control end and the second input control end of the switch module are connected with a corresponding output control end of the control module. The switch modules disconnect or connect balancing loops corresponding to the single cells according to control signals of the first input control end and the second input control end. According to the invention, the short circuit can be effectively avoided during active balancing on the single cells.
Description
Technical field [0001] The invention relates to the field of battery pack balancing, and in particular to an active balancing circuit. Background technique [0002] In the battery management system, active balancing can solve the problem of the consistency of the single cells. The working process of active balancing is: during the charging and discharging process of the battery pack, when the voltage of a certain single battery is too high, it will The battery discharges, and the voltage of the over-voltage single battery is actively equalized to the qualified voltage value; when the voltage of a single battery is too low, the under-voltage single battery is charged, and the under-voltage single battery is charged Actively equalize to a qualified voltage value. An active equalization circuit is usually equipped with a switch branch. Through the switch branch, a single battery that needs to be actively balanced is selected for charging or discharging. Since the battery pack is m...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 唐斌
Owner HUIZHOU BNET TECH CO LTD