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Power system for electrombile

A technology for power systems and electric vehicles, applied in the field of electric vehicles, can solve problems such as hidden safety hazards, shortened battery life, and alarming problems.

Active Publication Date: 2012-08-01
GUANGDONG POWERLINK ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after actual testing, the cycle life of lithium manganese oxide 48V10AH battery pack produced by a well-known company is only 673 times, and the service life is far from the 1500 times in the brochure.
In addition, electric vehicles cannot be used when the ambient temperature is lower than 10°C
In addition, due to the relatively active characteristics of lithium ions, when subjected to external pressure, impact, damage, high temperature or short circuit of the battery itself, the battery is extremely prone to combustion and explosion, which is surprisingly destructive
In June 2006, the frequent spontaneous combustion of lithium batteries in Dell computers and the explosion of lithium batteries in Guangdong in 2007 caused death. Many similar cases are enough to prove the huge potential safety hazards of lithium batteries used in electric bicycles, which may cause irreparable damage to users at any time.
However, in the existing zinc-nickel battery packs, there will be quality differences between the individual batteries, such as differences in capacity and internal resistance, and this difference will gradually increase with the accumulation of the number of uses. This is because the capacity of the battery pack in series A battery with the lowest and largest internal resistance is always in the state of overcharge and overdischarge, which will not only greatly shorten the service life of the battery pack, but also cause the battery to explode due to the deepening of overcharge and overdischarge during use.
It is precisely because of the serious potential safety hazards of the above-mentioned zinc-nickel batteries that they cannot be widely used on electric bicycles.

Method used

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  • Power system for electrombile
  • Power system for electrombile
  • Power system for electrombile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 It is a schematic structural diagram of the electric vehicle power system provided by the embodiment of the present application.

[0053] In the embodiment of the present application, the electric vehicle is provided with a motor 1 and a motor control system 2, and the motor 1 is used as a driving device for driving the wheels of the electric vehicle to provide power for the electric vehicle.

[0054] When charging electric vehicles, chargers are usually used, such as figure 1 As shown, 3 in the figure is a charger, and the main function of the charger 3 is to transform, rectify and filter the industrial power and input it into the battery pack on the electric vehicle to charge the battery pack.

[0055] Such as figure 1 As shown, the electric vehicle power system includes: a mounting bracket (not shown in the figure), a zinc-nickel battery pack 4 , an overcharge protection device 5 and an overdischarge protection device 6 .

[0056] In the embodiment of the...

Embodiment 2

[0066] figure 2 It is a schematic top view structure diagram of the mounting bracket provided by the embodiment of the present application. image 3 It is a schematic side view structural diagram of the mounting bracket provided by the embodiment of the present application.

[0067] Such as figure 2 and image 3 As shown, the mounting bracket includes: a plurality of bracket bodies 71, a plurality of metal connecting pieces (not shown in the figure), dovetail fasteners 73 and fastening bolts 74, wherein:

[0068] Each bracket body 71 is composed of a top 711 and a bottom 712. The top 711 and the bottom 712 of the bracket body 71 are fastened together, and a plurality of spaces that can accommodate zinc-nickel battery cells are also provided inside the bracket body 71. Such as image 3 As shown, 8 in the figure is a zinc-nickel battery cell. The function of multiple metal connecting pieces is to connect multiple zinc-nickel battery cells 8 in series.

[0069] Such as ...

Embodiment 3

[0075] Figure 6 It is a schematic structural diagram of an overcharge protection device provided in an embodiment of the present application.

[0076] Such as Figure 6 As shown, the overcharge protection device 5 may include: a temperature acquisition unit 51 , a temperature comparison unit 52 , a first logic control unit 53 and a first electronic switch 54 .

[0077] The temperature acquisition unit 51 is arranged in the zinc-nickel battery pack 4 and is used for collecting temperature signals of the zinc-nickel battery pack 4 .

[0078] In the normal charging process, when the zinc-nickel battery cells in the zinc-nickel battery pack 4 are not overcharged, the overall temperature of the zinc-nickel battery pack 4 is relatively stable, and once a certain zinc-nickel battery cell is overcharged, Then it will cause the temperature of the whole zinc-nickel battery pack 4 to rise, so it is only necessary to set a temperature acquisition unit 51 in the zinc-nickel battery pack...

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Abstract

The application discloses a power system for an electrombile, wherein a motor and a motor control system are arranged on the electrombile, the power system for the electrombile comprises an installing support, a nickel-zinc battery pack, an overcharge protector and an overdischarge protector, the nickel-zinc battery pack is fixed in the installing support on the electrombile, a charge protecting loop and a discharge protecting loop are arranged on the nickel-zinc battery pack, the discharge protecting loop is connected with the motor and the motor control system, and the overcharge protector is connected in the discharge protecting loop in series, and is used for detecting the temperature of the nickel-zinc battery pack and controlling the charge protecting loop to be switched on or off according to the detected temperature; and the overdischarge protector is connected in the discharge protecting loop in series, and is used for acquiring the voltage of a nickel-zinc battery single body, and controlling the discharge protecting loop to be switched on or off according to the acquired voltage. According to the power system for the electrombile, the conditions of overcharge and overdischarge can be avoided, the service life of the battery can be prolonged, and the performance of the electrombile can be further improved.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle power system. Background technique [0002] The batteries in electric bicycles sold in the existing market usually include lead-acid batteries, lithium series batteries (such as lithium manganese oxide batteries, lithium iron phosphate batteries, lithium cobalt oxide batteries), etc., but these batteries will have certain The problem: [0003] 1. The mass specific energy of the lead-acid battery is 35WH / Kg, and the volume specific energy is 70WH / L, which makes it bulky and heavy, which makes it inconvenient to disassemble and move. In addition, because the lead-acid battery is provided with a vent hole, the sulfuric acid electrolyte therein may overflow the body from time to time to corrode the electric vehicle. In addition, due to the continuous loss of electro-hydraulic, the lead-acid battery needs to be supplemented with electrolyte af...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L11/18
CPCY02T10/7005Y02T10/70
Inventor 黎瑞灵
Owner GUANGDONG POWERLINK ENERGY
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