Power battery equalization and heating composite circuit based on LC resonance and conductive film
A power battery and composite circuit technology, which is applied in the direction of charge equalization circuit, battery circuit device, circuit, etc., can solve the problems of lower lithium battery performance, slow ion conduction speed, large current, etc.
Pending Publication Date: 2021-03-19
HEBEI UNIV OF TECH
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Problems solved by technology
[0002] The existing equalization circuit has two methods of active equalization and passive equalization, which mainly consider the problem of power balance between battery cells, but ignore the heat generated during the process of power balance
In the active equalization circuit, the current formed is larger, and the heat generated inside the battery is more, but the heat has not been rationally utilized
In the passive equalization circuit, the high-power battery is mainly discharged through the energy-consuming resistor, and the heat generated by the energy-consuming resistor is directly dissipated into the air, resulting in energy waste
[0003] However, in a low-tempe...
Method used
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Embodiment 1
[0036] Such as figure 1 As shown, this embodiment is a power battery equalization and heating compound circuit (referred to as circuit) based on LC resonance and conductive film, including a battery pack, an LC resonance unit and a conductive film; the LC resonance unit includes an inductance L and a capacitor C connected in series ; The LC resonant unit leads to two positive connection terminals and two negative connection terminals, and one positive connection terminal is connected to the N-type MOS transistor Q 1 The source is connected, and the other positive connection is connected to the N-type MOS transistor Q 2 The drain connection, a negative connection terminal and N-type MOS transistor Q 3 The drain is connected, and the other negative terminal is connected to the N-type MOS transistor Q 4 source connection;
[0037] The battery pack includes six battery cells BT connected in series 1 ~BT 6 ;Battery unit BT 1 The positive pole of the relay S 1 With N-type MOS...
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Abstract
The invention relates to a power battery equalization and heating composite circuit based on LC resonance and a conductive film. The composite circuit comprises a battery pack, an LC resonance unit and the conductive film. Two positive electrode connecting ends and two negative electrode connecting ends are led out of the LC resonance unit, each connecting end is provided with a resonance unit switch, and the resonance unit switches on one positive electrode connecting end and one negative electrode connecting end form a pair of resonance unit switches. The battery pack comprises a plurality of battery monomers connected in series, and the positive electrode and the negative electrode of each battery monomer are connected with respective resonance unit switches on the LC resonance unit through two battery monomer switches respectively; wherein the conductive film is coated on the surface of the power battery, and two ends of the conductive film are respectively connected with resonanceunit switches on a positive electrode connecting end and a negative electrode connecting end of the LC resonance unit through connecting switches. The LC resonance unit and the conductive film are used as a part of a circuit, so that the electric quantity can be balanced, and the heat generated in the balancing process can be used for heating the power battery in a low-temperature environment.
Description
technical field [0001] The invention belongs to the technical field of power battery power balance, and in particular relates to a power battery balance and heating composite circuit based on LC resonance and conductive film. Background technique [0002] The existing equalization circuit has two modes of active equalization and passive equalization, which mainly consider the problem of power balance between battery cells, but ignore the heat generated in the process of power balance. In the active equalization circuit, the current formed is relatively large, and the heat generated inside the battery is relatively large, but the heat is not properly utilized. In the passive equalization circuit, the high-power battery is mainly discharged through the energy-consuming resistor, and the heat generated by the energy-consuming resistor is directly dissipated into the air, resulting in waste of energy. [0003] However, in a low-temperature environment, the viscosity of the elec...
Claims
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Patent Timeline
Login to view more IPC IPC(8): H02J7/00H01M10/42H01M10/615H01M10/635H01M10/637H01M10/6571
CPCH01M10/4207H01M10/425H01M2010/4271H02J7/0019H01M10/615H01M10/635H01M10/637H01M10/6571H02J7/007192Y02E60/10
Inventor 张闯张梁熊瑞张奎窦海明赵福鑫
Owner HEBEI UNIV OF TECH
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