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Composite power source composed of lead-acid storage battery monomer and lithium-ion battery monomer connected in parallel

A lead-acid battery, lithium-ion battery technology, used in battery pack components, battery circuit devices, circuits, etc.

Active Publication Date: 2012-07-04
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When necessary, a certain number of composite power supplies can be connected in series to form a composite power supply system

Method used

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  • Composite power source composed of lead-acid storage battery monomer and lithium-ion battery monomer connected in parallel
  • Composite power source composed of lead-acid storage battery monomer and lithium-ion battery monomer connected in parallel
  • Composite power source composed of lead-acid storage battery monomer and lithium-ion battery monomer connected in parallel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The capacity of colloidal lead-acid battery cell A is 100Ah, and the capacity of lithium manganese oxide / lithium titanate battery cell B is 10Ah. After both A and B are fully charged, they are connected in parallel to form a composite power supply. Perform 200A15S----100A15S discharge on the composite power supply, and the current undertaken by B during the discharge process is as follows: figure 1 shown. During the 200A discharge process, the average current borne by the lithium titanate battery is 122.6A, accounting for 61% of the total current. During the 100A discharge process, the average current borne by the lithium titanate battery is 87.8A, accounting for 88% of the total current. %.

Embodiment 2

[0027] The capacity of colloidal lead-acid battery cell A is 100Ah, and the capacity of lithium nickel cobalt manganese oxide / lithium titanate battery cell B is 10Ah. Adjust the SOC of A to 60%, fully charge B, and then connect the two in parallel to form a compound power supply. Perform 200A15S----100A15S discharge on the composite power supply, and the current undertaken by B during the discharge process is as follows: figure 2 shown. During the 200A discharge process, the average current borne by the lithium titanate battery is 148.3A, accounting for 74% of the total current. During the 100A discharge process, the average current borne by the lithium titanate battery is 100.9A, accounting for 101% of the total current. %.

[0028] figure 1 with figure 2 It shows that the composite power supply provided by the present invention, when an external load is connected to an instantaneous large current output, the lithium titanate battery bears most of the current, which can...

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Abstract

The invention relates to a composite power source which is characterized by comprising a lead-acid storage battery monomer A and a lithium-ion battery monomer B which have similar charge-discharge voltages, wherein firstly the monomer A is connected with the monomer B in parallel; and then the respective capacity is determined according to the load requirement, and the monomer A and the monomer B can be connected in series to form a composite power source system if necessary. The capacity ratio of the monomer A and the monomer B which constitute the composite power source is (0.05:10)-(10:0.05). When the composite power source is externally connected with a load low current output, one or both of the monomer A and the monomer B supplies / supply the power; and when the composite power source is externally connected with a load large current output, the monomer B independently supplies the power or the monomer B and the monomer A supply the power together. The composite power source provided by the invention not only can give full play to the power and service advantages of the monomer B, but also can give fully play to the price and safety advantages of the monomer A; meanwhile, the composite power source can be used for omitting complex management and control components increased by using different batteries; particularly, when a plurality of the composite power sources are connected in series, a necessary balancing circuit for the pure series connection of a plurality of lithium batteries is omitted.

Description

technical field [0001] The invention relates to a composite power supply, in particular to a composite power supply composed of a single lead-acid storage battery and a single lithium ion battery connected in parallel, and a power supply system composed of the composite power supply. Background technique [0002] With the continuous development of markets such as electric vehicles, electric bicycles, telecommunication base stations, UPS backup power supplies and energy storage, the requirements for the performance of the power supply-battery are getting higher and higher. With the characteristics of high specific energy, high specific power, long service life and low price, it is difficult for a single battery to meet the requirements. [0003] Lead-acid battery has mature technology, low price, large monomer capacity, high safety, and relatively complete recovery system, but its specific energy and specific power are low, and its cycle life is short; However, lithium-ion b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M16/00H01M2/20H02J7/00
CPCY02E60/12Y02E60/10
Inventor 夏保佳谢晓华娄豫皖张建
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI