Lithium secondary battery bank

A technology for lithium secondary batteries and battery packs, applied in lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of uneven current density distribution, battery capacity attenuation, poor cycle performance, etc., and achieve good battery safety performance and consistency. Improve and improve the effect of battery heating

Inactive Publication Date: 2010-09-15
林道勇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide a new lithium secondary battery pack to improve the uneven distribution of current density between the single cells or inside the batter

Method used

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Examples

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Embodiment 1

[0050] Such as Figure 4 As shown, in a 345.6V, 40Ah lithium iron phosphate battery pack for a hybrid electric vehicle, 108 3.2V, 10Ah lithium iron phosphate single cells 101 are connected in series to form a 345.6V, 10Ah lithium iron phosphate battery pack unit 102, and then Four 345.6V, 10Ah lithium iron phosphate battery pack units 102 are connected in parallel to form a 345.6V, 40Ah lithium iron phosphate battery pack 103 .

[0051] Since the charging and discharging rate of the hybrid electric vehicle battery pack is quite large, this embodiment and the conventional combination form 1, that is, four 3.2V, 10Ah lithium iron phosphate single cells are connected in parallel to form a 3.2V, 40Ah lithium iron phosphate The battery is connected in series by 108 3.2V, 40Ah lithium iron phosphate batteries to form a 345.6V, 40Ah lithium iron phosphate battery pack. Compared with this, the phenomenon of uneven current density distribution between single batteries will be effective...

Embodiment 2

[0053] Such as Figure 5As shown, in the 48V, 300Ah nickel-cobalt-manganese ternary material lithium secondary battery pack with a charging and discharging current of 100A for communication backup power supply, there are 15 3.6V, 10Ah nickel-cobalt-manganese ternary materials with a maximum charging and discharging current of 5 times The single battery 201 of the element material is connected in parallel to form a 3.6V, 150Ah nickel-cobalt-manganese ternary material lithium secondary battery 202, and then 13 3.6V, 150Ah nickel-cobalt-manganese ternary material lithium secondary batteries 202 are connected in series to form a 48V, 150Ah battery. The nickel-cobalt-manganese ternary material lithium secondary battery unit 203, and then two 48V, 150Ah nickel-cobalt-manganese ternary material lithium secondary battery units 203 are connected in parallel to form a 48V, 300Ah nickel-cobalt-manganese ternary material lithium secondary battery pack 204.

[0054] The present embodiment...

Embodiment 3

[0057] Such as Figure 6 , Figure 7 As shown, in a 288V, 100Ah lithium manganate battery pack for pure electric vehicles, two 3.7V, 12.5Ah lithium manganate cells 301 are connected in parallel to form a 3.7V, 25Ah lithium manganate battery 302, and then 13 3.7 V, 25Ah lithium manganate batteries 302 are connected in series to form a 48V, 25Ah lithium manganate battery pack unit 303, and then four 48V, 25Ah lithium manganate battery pack units 303 are connected in parallel to form a 48V, 100Ah lithium manganate battery pack module 304 , and then six 48V, 100Ah lithium manganate battery pack modules 304 are connected in series to form a 288V, 100Ah lithium manganate battery pack 305 .

[0058] This embodiment and the conventional combination form one, that is, eight 3.7V, 12.5Ah lithium manganate cells are connected in parallel to form a 3.7V, 100Ah lithium manganate battery, and then seventy-eight 3.7V, 100Ah lithium manganate batteries are The batteries are connected in ser...

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PUM

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Abstract

The invention relates to a lithium secondary battery bank, comprising a plurality of mutually parallel battery bank cells, wherein, each battery bank cell is composed of at least two lithium secondary batteries in series. The lithium secondary battery bank improves the consistency of current density distribution of the battery, thus improving the problems of poor heating property, poor cycle performance and the like of the battery and enhancing the performance of the battery bank.

Description

technical field [0001] The invention relates to the battery field, in particular to a lithium secondary battery pack. Background technique [0002] Lithium secondary battery is an ideal power source because of its high working voltage, small size, light weight and long cycle life. [0003] With the development of electric bicycles, electric motorcycles, micro electric vehicles, electric cars, electric buses, backup power sources, and energy storage power stations, the demand for battery packs with higher total energy is also increasing. Due to the use of single large-capacity batteries or low-voltage large-capacity battery packs, the current is large, the wires are thick, and the energy efficiency is low, so the voltage of the battery pack cannot be made too low; but in terms of insulation, safety and electronic components. From the perspective of consistency and other considerations, the voltage of the battery pack cannot be made too high, so the capacity of the battery pa...

Claims

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Application Information

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IPC IPC(8): H01M10/052
CPCY02E60/122Y02E60/10
Inventor 林道勇
Owner 林道勇
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