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Battery equalization method and battery equalization circuit

A battery balancing and balancing technology, applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve the problems of increasing the weight and volume of balancing circuits, difficult integrated circuits, and the impact of battery pack output. The effect of integration, simplifying the circuit structure, and speeding up the equalization speed

Active Publication Date: 2005-09-14
SUZHOU PHYLION BATTERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its equalization is achieved through a resonant circuit. On the one hand, resonant coils and iron cores need to be installed, resulting in an increase in the weight and volume of the equalization circuit, and it is difficult to implement with integrated circuits. On the other hand, due to the introduction of AC components, it is impossible Avoid affecting the output of the battery pack

Method used

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  • Battery equalization method and battery equalization circuit
  • Battery equalization method and battery equalization circuit
  • Battery equalization method and battery equalization circuit

Examples

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Effect test

Embodiment 1

[0031] Embodiment one: see attached figure 1 to attach Figure 4 As shown, a battery balancing circuit is used to balance the power of a series battery pack composed of 8 lithium rechargeable batteries. It is composed of a two-stage battery balancing circuit structure, and a set of battery balancing circuits is set between every two adjacent batteries unit, which constitutes the first-level battery balancing circuit; a set of battery balancing circuit units are respectively set up for the 4 batteries at the negative end, the 4 batteries at the middle end, and the 4 batteries at the positive end to form the second-level battery balancing circuit, and each battery balancing circuit unit work independently.

[0032] The battery equalization circuit unit of this embodiment includes a voltage divider circuit and a discharge circuit, and the voltage divider circuit is composed of a voltage divider resistor arranged between the positive terminal and the negative terminal of 2 or 4 b...

Embodiment 2

[0034] Embodiment two: see attached Figure 5 to attach Figure 7 As shown, a battery balancing circuit is used to balance the power of a series battery pack composed of 6 lithium rechargeable batteries, and a group of battery balancing circuit units are arranged between each adjacent two batteries, and the battery balancing circuit unit includes a voltage divider circuit, a first comparator, a first discharge switch connected between the positive terminal and the middle terminal of the battery pack and a first discharge resistor, a second comparator, a second discharge switch connected between the middle terminal and the negative terminal of the battery pack and the second discharge resistor; the positive phase input of the first comparator is connected to the middle value position of the voltage divider circuit, the negative phase input is connected to the middle terminal of the battery pack, and the output drives the first discharge switch; the positive phase of the second ...

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Abstract

A method for balancing energies of serial batteries characterizes in taking even serial batteries as a unit to get the intermediate value of voltage different between positive and negative of said batteries and comparing with the central end of said batteries, when the intermediate voltage is lower than that of the central end, the batteries below the central end are charged to balance the electricity above and under the central end. The serial battery set is divided into multiple even serial battery sets to be operated on said balance, so that energy of the entire serial battery set reaches the uniform distribution.

Description

technical field [0001] The invention relates to a method and a circuit for balancing the battery packs in series or each battery cell in the battery pack, which is suitable for rechargeable batteries used in series, and can keep the power and voltage of each battery balanced, so as to Show high charge and discharge performance. Background technique [0002] Batteries are usually used in series and parallel to provide higher output voltage and larger power capacity to meet the needs of load driving. Because rechargeable batteries have better cost performance, they are widely used in various electronic products and even electric vehicles. However, no matter it is a lithium rechargeable battery, a lead-acid rechargeable battery, or a nickel-metal hydride rechargeable battery, due to the limitation of the process conditions, there are certain differences between the single cells. Although the problem can be partially solved by the method of matching gro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H02J7/00
CPCY02E60/12Y02E60/10
Inventor 杨杰范田郴黄学杰
Owner SUZHOU PHYLION BATTERY
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