Mixing battery pack of lead-acid batteries and lithium batteries

Abstract

The invention belongs to the technical field of batteries, in particular to a mixing battery pack of lead-acid batteries and lithium batteries. The mixing battery pack is characterized in that output ends of a lead-acid battery pack and a lithium battery pack are connected in parallel, and the lead-acid battery pack and the lithium battery pack are restrained at a total voltage part; or a weighting resistor is connected in parallel for restraining at a connecting point of a least common multiple of unit batteries in the lead-acid battery pack and the lithium battery pack so as to ensure that the lead-acid batteries are unitized to protect the lithium batteries, thus the protection is more comprehensive; and the weighting resistor has the function of weighting protection. The mixing battery pack can be jointly charged, and the lithium batteries can also be separately charged and jointly used. The mixing battery pack is used for improving the use environment of the unit batteries in the lithium battery pack, ensures that the lead-acid batteries and the lithium batteries make up for deficiencies and give a full play to respectively advantages and can be widely applied to various occasions using the lead-acid batteries or the lithium batteries.

Description

technical field [0001] The invention relates to battery technology, in particular to a lead-acid battery and lithium battery hybrid battery pack. Background technique [0002] Lithium-ion batteries have been widely used in portable electrical appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. The currently developed high-capacity lithium-ion battery has been tested in electric vehicles and is expected to become one of the main power sources for electric vehicles in the 21st century, and will be used in satellites, aerospace and energy storage. With the shortage of energy and the pressure of the world's environmental protection, lithium batteries are now widely used in the electric vehicle industry, especially the emergence of lithium iron phosphate batteries. Lithium-ion batteries have excellent storage performance and long cycle life. Lithium batteries have the following characteristics: [0003] (1) Higher energy-to...

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Problems solved by technology

[0004] (2) The voltage is high, the voltage of a single lithium battery is 3.6V, which is approximately equal to the series voltage of 3 NiCd or NiMH rechargeable batteries;

[0007] However, lithium batteries also have the following disadvantages: poor safety performance; lithium batteries have poor high-current capability, and when high-current discharge or charge is easy to break down the diaphragm and damage the lithium battery; excessive charging voltage can easily cause the lithium battery to swell, resulting in failure. In use, a protective plate is required during use

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