Abstract: A battery health state evaluation method for evaluating a health state of a battery comprises a charging step, an idling step, a pulse discharging step, an evaluation index calculating step, and an evaluation result yielding step. The evaluation index calculating step retrieves a continuous voltage data and a continuous current data in a charging process, an idling process, and a pulse discharge process and calculates a plurality of evaluation indexed according to the continuous voltage data and continuous current data. The evaluation indexes are associated with the health state of the battery. The evaluation result yielding step evaluates the health state of the battery according to the indexes and yields an evaluation result. Therefore, the battery health state evaluation method is easy, convenient, and effective in performing a test quickly and accurately.

Abstract: A battery health state evaluation method for evaluating a health state of a battery comprises a charging step, an idling step, a pulse discharging step, an evaluation index calculating step, and an evaluation result yielding step. The evaluation index calculating step retrieves a continuous voltage data and a continuous current data in a charging process, an idling process, and a pulse discharge process and calculates a plurality of evaluation indexed according to the continuous voltage data and continuous current data. The evaluation indexes are associated with the health state of the battery. The evaluation result yielding step evaluates the health state of the battery according to the indexes and yields an evaluation result. Therefore, the battery health state evaluation method is easy, convenient, and effective in performing a test quickly and accurately.

Abstract: A hybrid electric vehicle includes a wheel, a wheel driving device coupled with the wheel and including an electric motor, a battery unit including a first battery and a second battery, a generator for recharging the first battery and the second battery, a fuel engine operable to drive the generator to generate electricity, a first switch for establishing electrical connection between the generator and each of the first battery and the second battery, a second switch for establishing electrical connection between the electric motor and each of the first battery and the second battery, and a control unit operable to control the first switch and the second switch to make or break electrical connection.

Abstract: A hybrid electric vehicle includes a wheel, a wheel driving device coupled with the wheel and including an electric motor, a battery unit including a first battery and a second battery, a generator for recharging the first battery and the second battery, a fuel engine operable to drive the generator to generate electricity, a first switch for establishing electrical connection between the generator and each of the first battery and the second battery, a second switch for establishing electrical connection between the electric motor and each of the first battery and the second battery, and a control unit operable to control the first switch and the second switch to make or break electrical connection.

Abstract: A structure for changing engine oil in the transmission case of the engine of a motor vehicle comprises a low pressure oil cylinder and a high pressure automatic throttle valve. The change of engine oil is attained by an oil-changing loop of the automatic circulation system.