Battery pack storage type circuit and on-line equalization method thereof
A balancing method and battery pack technology, applied in battery circuit devices, charge balancing circuits, circuit devices, etc., can solve the problems of low efficiency, affecting energy use, and large energy consumption.
Inactive Publication Date: 2018-02-09
JINAN UNIVERSITY +2
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Problems solved by technology
However, how to manage lithium battery packs and battery packs composed of several battery packs has become a new problem, especially for large-scale decommissioned power battery packs. Plays a very important role. Long-term imbalance will shorten the life of the entire battery pack and seriously affect the energy usage when forming a large-scale energy storage device.
The existing battery pack equalization methods include the resistance consumption equalization method, the switched capacitor method, the switched inductance method, etc., but the above methods have obvious shortcomings. Other battery cells need to use the lowest cell as the standard to achieve balance, and the efficiency is low; the switched capacitor method requires a long time to equalize because the energy is transferred one by one; the switched inductor method uses the battery cell as the standard to achieve balance, and the efficiency is low
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[0063] This embodiment discloses a battery pack storage circuit, which includes multiple battery packs, and the multiple battery packs are divided into two groups with the same number of battery packs, which are respectively the first battery team and the second battery team; The battery packs are connected in series in sequence; each battery pack is composed of one or more single cells.
[0064] Among them, for each battery pack in the second battery team, one end thereof is respectively connected to a plurality of first switch tubes, and one end of each battery pack in the first battery team is correspondingly connected through a plurality of first switch tubes, and the other ends are respectively connected to A plurality of second switch tubes are correspondingly connected to the other end of each battery pack in the first battery team through a plurality of second switch tubes; the on-off control ends of each first switch tube and each second switch tube are respectively co...
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The invention discloses a battery pack storage type circuit and an on-line equalization method thereof. The battery pack storage type circuit comprises a plurality of battery packs, wherein a plurality of battery groups are divided into two groups which are respectively a first battery group and a second battery group, the numbers of the battery packs in the first battery group and the numbers ofthe battery packs in the second battery group are same, and the battery packs in the first battery group are sequentially connected in connected, one end of each battery pack in the second battery group is correspondingly connected with one end of each battery pack in the first battery group via a plurality of first switch tubes, the other end of the battery pack in the first battery group is correspondingly connected with the other end of each battery pack in the first battery group via a plurality of second switch tubes, on / off control ends of each first switch tube and each second switch tube are connected with a controller, and the switch-on and the switch-off of each first switch tube and each second switch tube are controlled by the controller. The reconfiguration of a parallel relation between each battery pack in the first battery group and each battery pack of the second battery group is achieved by the controller, so that the energy equalization of each battery pack is rapidly and accurately achieved.
Description
technical field [0001] The invention relates to the technical field of energy storage battery group management, in particular to a battery pack storage circuit and an online equalization method thereof. Background technique [0002] Lithium battery energy storage technology is an important branch of energy storage technology. Lithium-ion battery packs have high energy density, small self-discharge, no memory effect, wide operating temperature range, fast charging and discharging, long service life, and no environmental pollution. And other advantages, known as the green battery pack. However, how to manage lithium battery packs and battery packs composed of several battery packs has become a new problem, especially for large-scale decommissioned power battery packs. Plays a very important role, long-term imbalance will lead to shorten the life of the entire battery pack, seriously affecting the energy usage when forming a large-scale energy storage device. The existing bat...
Claims
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Login to View More IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 刘新东陈铭泰张新征周曙
Owner JINAN UNIVERSITY