A lithium-ion battery balance conditioning circuit
A lithium-ion battery and conditioning circuit technology, applied in battery circuit devices, circuits, secondary batteries, etc., can solve the problems of unsatisfactory balance of single cells, slow equalization processing speed, and high average discharge voltage, and achieve improved speed and rapidity. The effect of selecting and reducing power consumption
Active Publication Date: 2013-11-27
BEIJING SATELLITE MFG FACTORY
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Problems solved by technology
[0006] (3) Low self-discharge rate
[0007] (4) No memory effect
[0012] The currently used lithium-ion battery equalization adjustment method is mostly implemented by distributed equalization resistors. Due to the limitations of volume and heat dissipation, the power of each equalization resistor is very small, resulting in a very slow equalization processing speed, and the current equalization adjustment method It is mainly designed for cell balance during charging, but the balance of single cells during discharge cannot meet the requirements
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[0033] The circuit of the present invention is suitable for occasions where multiple cells are connected in series, such as figure 1 As shown, the application of three single lithium-ion batteries in series is taken as an example for illustration.
[0034]A lithium-ion battery balance conditioning circuit, including a measurement circuit, a control circuit, a cell selection circuit and a cell balance conditioning circuit, wherein the measurement circuit includes an emitter follower OP1, an emitter follower OP2, and an emitter follower OP3 , emitter follower OP4, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor R12;
[0035] The control circuit includes a PMOS transistor Qd, a PMOS transistor Qc, a PMOS transistor Q1, a PMOS transistor Q2, a PMOS transistor Q3, a diode D1, a diode D2, and a diode D3;
[0036] The single battery selection circuit includes a switch K1, a swit...
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Abstract
The invention discloses a lithium ion battery balance conditioning circuit, which includes a single battery measurement circuit, a single battery selection circuit and a single battery balance conditioning circuit. The overall circuit is equipped with a charge and discharge selection switch, each single cell measurement circuit is connected to the positive and negative poles of each single cell, and the single cell selection circuit has multiple input ports to select multiple single cells , the cell selection circuit outputs to the cell balance conditioning circuit. The selected single battery can be balanced and adjusted through the single-cell equalization conditioning circuit, which realizes the rapid equalization processing of the lithium-ion battery. It has the advantages of fast equalization speed and low heat consumption, which can ensure the equalization of each single cell in the whole battery pack during charging and discharging, thereby ensuring the safe and reliable operation of the lithium-ion battery pack. It can be applied to the application of lithium-ion battery cells in series with high reliability requirements and fast equalization processing speed.
Description
technical field [0001] The invention relates to a lithium-ion battery balance conditioning circuit, which is used in the series application of multiple single lithium-ion batteries and meets the requirements of high reliability and high efficiency. Background technique [0002] National defense and the national economy require satellite application technology to make high reliability and long life an important performance index for satellites. In order to meet the requirements of long life and high reliability, the efficiency and reliability of energy storage equipment must be improved to improve the reliability of the whole star. As an important part of the satellite power system, the battery is the energy storage component of the satellite. With the increasingly complex functions of satellites, the increase in the number and types of payloads, and the increase in power requirements, new battery technologies need to be adopted, and it has become a development trend to repl...
Claims
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IPC IPC(8): H01M10/42H01M10/48H02J7/00
Inventor 邓晓彬谭小野王宇鹏高亚方
Owner BEIJING SATELLITE MFG FACTORY