APPARATUS FOR INDICATING THE STATE OF CHARGE OF A STORAGE BATTERY
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Accused Products
Abstract
Storage batteries having a rechargeable battery for operating electric tools often have a state of charge indicator. A state of charge circuit, which has a sensor that is coupled to the evaluation unit, is provided in order to identify the operating state of the storage battery. An interlock switch for preventing indication of the state of the charge is coupled to the evaluation unit. If charging or discharging of the rechargeable battery is identified using the sensor, the interlock switch is used to prevent indication of the current state of charge.
6 Citations
29 Claims
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1-9. -9. (canceled)
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10. An accumulator for a power tool, having a rechargeable battery equipped with a charge state circuit, the charge state circuit comprising:
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an evaluation unit for evaluating the charge state of the accumulator; a charge state display; a sensor coupled to the evaluation unit which is able to determine whether the battery is being charged or discharged; and an interlock switch coupled to the evaluation unit which prevents the charge state display from a display of the charge state. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for displaying the charge state of a rechargeable battery of an accumulator, the rechargeable battery being equipped with a charge state circuit having an evaluation unit for evaluating the charge state of the accumulator and having a charge state display, the method comprising the steps of:
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switching an activation switch of the charge state circuit which activates the charge state circuit; using a sensor of the charge state circuit to determine whether the battery is being charged or discharged; and deactivating an interlock switch in the evaluation unit thus enabling a display of the charge state of the rechargeable battery if the rechargeable battery is not being charged or discharged, or else activating the interlock switch thus preventing the display if the rechargeable battery is being charged or discharged. - View Dependent Claims (27, 28, 29)
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Specification