Battery equalization device and battery equalization control method
A technology for battery equalization and equalization circuits, applied in charge equalization circuits, battery circuit devices, circuit devices, etc., which can solve problems such as reduced system reliability, complex circuits, and longer equalization time, so as to improve equalization efficiency and simplify circuits. Effect
Pending Publication Date: 2021-06-22
POWERVISION TECH SUZHOU LTD
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Problems solved by technology
This method is simple, but it is generally suitable for balancing between adjacent single cells. When there are many cells in the battery pack, the number of inductive devices is large, the circuit is complicated, the system reliability is reduced, the equalization time will be longer, and the efficiency will be reduced.
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[0050] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
[0051] Like numbers and letters denote similar items in the following figures, so that once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.
[0052] figure 1 It is a schematic frame diagram of a battery balancing device provided in an embodiment of the present application. Such as figure 1 As shown, the battery balancing device includes: a battery pack 100 , a sampling circuit 101 , a control unit 102 , a balancing circuit 103 and a switching circuit 104 .
[0053] Wherein, the battery pack 100 includes a plurality of singl...
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The invention provides a battery equalization device and a battery equalization control method, and the device comprises a battery pack which comprises a plurality of single batteries which are connected in series; a sampling circuit which is connected with the battery pack and is used for collecting the voltage value of each single battery; a control unit which is connected with the sampling circuit and is used for determining a high-voltage single battery and a low-voltage single battery according to the voltage value of each single battery; an equalization circuit which is connected with the control unit and is used for storing or supplying energy under the control of the control unit; and a switching circuit which is connected with the battery pack, the equalization circuit and the control unit and is used for independently controlling connection and disconnection between each single battery and the equalization circuit. The control unit is also used for controlling the switching circuit and the equalization circuit, enabling the electric energy of the high-voltage single battery to flow into the equalization circuit for energy storage, and enabling the electric energy stored by the equalization circuit to flow into the low-voltage single battery. According to the scheme, electric energy equalization is realized, the circuit is simplified, and equalization efficiency is improved.
Description
technical field [0001] The present application relates to the technical field of batteries, in particular to a battery balancing device and a balancing control method. Background technique [0002] In a system powered by lithium batteries, due to the low voltage of lithium battery cells, in order to realize the application of high voltage applications, it is usually necessary to combine lithium cells in series to achieve high voltage output. However, there are differences in the production process of lithium batteries, and there are differences in the internal resistance of the paired cells. In actual work, the working environment temperature and other parameters are inconsistent, so the battery pack will be overcharged and overdischarged during the charging and discharging process. When the voltage of one cell reaches the charge cut-off voltage or discharge cut-off voltage of a single cell, the system stops charging or discharging the entire battery pack. This means that t...
Claims
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Login to View More IPC IPC(8): H02J7/00
CPCH02J7/0018
Inventor 不公告发明人
Owner POWERVISION TECH SUZHOU LTD