Accumulator set for electric vehicles

A technology of electric vehicles and battery packs, applied in electric vehicles, vehicle energy storage, vehicle components, etc., can solve problems such as unbalanced batteries in series, battery overdischarge, explosion, etc., and achieve the effect of increasing reliability

Inactive Publication Date: 2003-10-22
范汉强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, electric vehicles, electric vehicles, trolleybuses, etc. all use batteries as power sources. These batteries are actually composed of several batteries connected in series. Since the performance of each series battery cannot be completely the same, when charging, Some batteries are not fully charged, and some batteries have over-current and over-voltage. When discharging, some weak batteries will be over-discharged, resulting in an imbalance between the batteries in series.
All of the above situations will lead to battery damage due to overvoltage and overtemperature, and even cause explosion. The more batteries connected in series, the more times of charge and discharge, the more serious the imbalance between the batteries connected in series, and the greater the charging current, The damage to the battery is also more serious
In the prior art, the problem of unbalancedness has not been considered from the perspective of the battery pack itself, but only by adding functions such as multi-level current control and floating charge to the charger to improve the reliability of charging, but these are all Unable to resolve imbalances between cells in series

Method used

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  • Accumulator set for electric vehicles
  • Accumulator set for electric vehicles
  • Accumulator set for electric vehicles

Examples

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Embodiment Construction

[0014] Such as figure 1 As shown, the present invention is composed of several batteries connected in series, and each battery is connected in parallel with the same equalizer, which is composed of an overvoltage shunt circuit and an overtemperature shunt circuit; the overvoltage shunt circuit includes LM358 comparator AV, 8050NPN Type transistor Tr1, SG3843 current-type pulse width modulation module IC1 and 2SK2690 field effect tube Tr2, the charging voltage of the battery is filtered and divided, and connected to the non-inverting input terminal of the LM358 comparator AV. The output terminal of the comparator AV is connected to the 8050 transistor The base of Tr1 is connected, the collector of triode Tr1 is connected to the negative pole of the battery, the emitter of triode Tr1 is connected to the trigger terminal 1 of SG3843 current pulse width modulation module IC1, and the trigger terminal is connected to the positive terminal of the battery through resistor R3 and resis...

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Abstract

An accumulator set for electric vehicles is composed of several accumulators connected serially and several equalizers. Each accumulator is parallelly connected with an equalizer for automatic by-pass when over-voltage or over-heat presents on charging, to protect the accumulator.

Description

technical field [0001] The invention relates to a battery pack used for powering electric vehicles such as electric cars, electric cars, and trolley buses. Background technique [0002] At present, electric vehicles, electric vehicles, trolleybuses, etc. all use batteries as power sources. These batteries are actually composed of several batteries connected in series. Since the performance of each series battery cannot be completely the same, when charging, Some batteries are not fully charged, and some batteries have over-current and over-voltage. When discharging, some weak batteries will be over-discharged, resulting in an imbalance between the batteries in series. All of the above situations will lead to battery damage due to overvoltage and overtemperature, and even cause explosion. The more batteries connected in series, the more times of charge and discharge, the more serious the imbalance between the batteries connected in series, and the greater the charging current...

Claims

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Application Information

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IPC IPC(8): B60L11/18H02J7/00
CPCY02T10/7055Y02T10/7005Y02T10/70
Inventor 范汉强
Owner 范汉强
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