A battery management device and mobile terminal
A technology for battery management and power management, applied in battery circuit devices, circuit devices, DC network circuit devices, etc., and can solve problems such as potential safety hazards
Active Publication Date: 2021-04-06
ZTE CORP
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Problems solved by technology
[0004] However, when multiple batteries are connected in parallel to the mobile terminal power supply system at the same time, if the voltages of the batteries are different, they cannot be directly connected together, otherwise the voltage difference between the batteries will form a reverse flow from the battery with high voltage to the battery with low voltage current, which could pose a serious safety hazard
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[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0021] Most of the multi-battery management circuits currently used in mobile terminals are digital load switches with peripheral voltage detection circuits, precision voltage reference sources, comparators, and connected to the internal processor chip GPIO (General Purpose Input Output) of the mobile terminal. The logic control circuit of the pin is composed. The disadvantages of this type of solution include: complex circuit; poor scalability; long switching time; it is very difficult to switch between batteries safely and smoothly under the premise of ensuring uninterrupte...
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The embodiment of the present invention discloses a battery management device and a mobile terminal, wherein the battery management device includes a charging unit, a battery unit, and a power management circuit, and also includes an isolation unit, wherein the charging unit, the battery unit, the isolation The unit is connected to the power management circuit in sequence, the battery unit includes at least two batteries, and the isolation unit is used to connect one or more batteries with the power management circuit and block the reverse current between the batteries. In the embodiment of the present invention, by using the isolation unit, the high-voltage battery can prevent the low-voltage battery from pouring current, and one or more batteries can be used to supply power to the mobile terminal, and the maximum battery capacity allowed by the mobile terminal can be increased without increasing the safety risk. capacity to extend battery life.
Description
technical field [0001] The present application relates to the field of battery management, in particular to a battery management device and a mobile terminal. Background technique [0002] With the continuous evolution and development of functions and performance of mobile terminals such as smart phones, the power consumption of the whole machine is also increasing. In order to improve the battery life of mobile terminals, the capacity and volume of batteries inside such products are also increasing. However, the safety risks of individual battery cells with excessive capacity and volume are also increasing. In recent years, there have been many mobile phone fire accidents at home and abroad, especially the repeated fires of a certain foreign brand mobile phone were finally determined to be caused by internal defects of large-capacity batteries. In order to properly avoid safety risks, dual batteries or even multiple batteries have become a feasible solution. [0003] At ...
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IPC IPC(8): H01M10/42H02J7/00
CPCH02J7/0026H01M10/4207H01M10/425H02J7/0013H01M2010/4271H01M10/42Y02E60/10H02J1/108H02J1/10H02J7/0034H02J7/0063H02J7/00032H01M10/46H01M2010/4278H01M2220/30H02J7/0029
Inventor 曾宪铮张爱同
Owner ZTE CORP