Electric device and apparatus for charging battery unit, and method for charging and discharging

Abstract

An electric device, comprising a plurality of detachable battery units 2, 3, 4, each comprising a battery pack 2B, 3B, 4B and a storage mechanism 11, 12, 13 for storing information about the charging and discharging status of the battery. A connection mechanism is provided to electrically connect and disconnect the electric device 1 in response to each battery cell being attached and detached. The device includes a driving mechanism 9 for driving a load, a charging mechanism 5 for charging the accumulators 2B, 3B, 4B with reference to information stored in the storage mechanisms 11, 12, 13 of the installed battery units 2, 3, 4, and The control means 6 controls the electric power supplied from each battery unit 2, 3, 4 to the drive means 9 with reference to the above-mentioned information.

Description

technical field [0001] The present invention relates to an electric device such as an electric vehicle such as an electric two-wheeled vehicle or an electric wheelchair using electric energy of a battery as a power source, a charging device for charging the battery unit thereof, and a method for charging and discharging the battery unit. Background technique [0002] Like an electric two-wheeled vehicle or an electric wheelchair, there is an electric vehicle equipped with a storage battery pack composed of a plurality of storage batteries as a power source. Among such electric vehicles, there are vehicles that drive the electric motor with electric energy (electric power) from a mounted battery pack and run only by the driving force, or vehicles that run by the combined force of the driving force of the electric motor and human power, or A vehicle, etc. that switches between the driving force of the gasoline engine and the driving force of the electric motor. [0003] The s...

AI Technical Summary

Problems solved by technology

[0030] However, when a large load is applied when the vehicle starts, accelerates, etc., and a large current discharge is required, a plurality of battery packs connected in parallel are discharged separately. The group is discharged with a small current, so it is difficult to accurately manage the remaining capacity of each battery group, and it is impossible to control the most efficient discharge and charge.

[0031] In particular, in the case of using a storage battery pack that is repeatedly charged and discharged in a state where the depth of discharge is shallow, a so-called memory effect occurs in which the capacity of the battery is reduced. Although it is best to carry out individual battery packs in order to prevent this memory effect, Optimal charge and discharge control, but this control is difficult

[0032] In addition, when the battery pack that has been discharged to the specified remaining capacity is taken out from the vehicle and charged by a charging device at another place, the management of the batteries will be managed in a uniform order, so it is impossible to confirm the status of the battery pack when it is taken out. Charge and discharge conditions, the best charge control

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