Battery equalization circuit and metal oxide semiconductor (MOS) tube switching circuit
A technology of MOS tube and equalizing circuit, which is applied in the field of battery equalizing circuit and MOS tube switching circuit, can solve problems such as differences in battery cells, effective capacity reduction of series battery packs, and impact on battery pack performance and life, so as to improve work The effect of stability
Active Publication Date: 2013-05-08
DONGGUAN POWERWISE TECH CO LTD
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Problems solved by technology
However, no matter whether it is a lithium rechargeable battery, a lead-acid rechargeable battery or a nickel-metal hydride rechargeable battery, due to the limitation of its process conditions, there may be certain differences between the battery cells.
Although the difference between battery cells can be solved by matching groups, after multiple charge-discharge cycles, there will still be a large voltage difference between the battery cells, which will reduce the effective capacity of the battery pack in series. , thereby affecting the performance and life of the battery pack
[0003] Therefore, it is necessary to provide a battery balancing circuit to solve the problem of differences between battery cells used in series in the prior art
Method used
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[0023] See figure 1 , figure 1 A circuit diagram of a battery balancing circuit according to the first embodiment of the present invention. In this embodiment, batteries BT1 and BT2 are connected in series. Specifically, the negative electrode of battery BT1 is connected to the positive electrode of battery BT2. The battery balancing circuit of this embodiment includes switches K1, K2, inductor L1, and diodes D1, D2.
[0024] In this embodiment, the switch K1 includes a first terminal, a second terminal and a third terminal. The first terminal of the switch K1 is used to receive the first control signal CTL1, so that the second terminal and the third terminal of the switch K1 are selectively turned on under the action of the first control signal CTL1. The third end of the switch K1 is further connected to the positive pole of the battery BT1.
[0025] In this embodiment, the switch K2 also includes a first terminal, a second terminal and a third terminal. The first termi...
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The invention discloses a battery equalization circuit which comprises a capacitor, a metal oxide semiconductor (MOS) tube, a resistor and a clamping element, wherein a first end of the capacitance receives a voltage control signal, the voltage control signal is a pulse signal which comprises a first level signal and a second level signal, a first end of the MOS tube is connected with a second end of the capacitor, a first end of the resistor is connected with the first end of the MOS tube, a second end of the resistor is connected with a third end of the MOS tube, a first end of the clamping element is connected with the first end of the MOS tube, a second end of the clamping element is connected with the third end of the MOS tube, the clamping element is disconnected when the voltage control signal changes into the first level signal from the second level signal in a jumping mode, and the clamping element is communicated when the voltage control signal changes into the second level signal from the first level signal in a clamping mode. The invention further provides an MOS tube switching circuit. Through the above way, circuit stability can be effectively improved by the battery equalization circuit and the MOS tube switching circuit.
Description
technical field [0001] The invention relates to a battery balancing circuit, in particular to a battery balancing circuit and a MOS tube switch circuit for balancing the electric quantity in batteries used in series. Background technique [0002] During the use of the battery, the battery is usually used in series to provide a higher output voltage and a larger power capacity to meet the demand for load driving. However, no matter whether it is a lithium rechargeable battery, a lead-acid rechargeable battery or a nickel-metal hydride rechargeable battery, due to the limitation of its process conditions, there may be certain differences between the battery cells. Although the difference between battery cells can be solved by matching groups, after multiple charge-discharge cycles, there will still be a large voltage difference between the battery cells, which will reduce the effective capacity of the battery pack in series. , thus affecting the performance and life of the ba...
Claims
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IPC IPC(8): H02J7/00H03K17/687
Inventor 张诚
Owner DONGGUAN POWERWISE TECH CO LTD