Electric power tool system
First Claim
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1. An electric power tool system comprising:
- a tool main body;
a battery pack detachably attached to the tool main body and comprising at least one rechargeable battery; and
a first charger configured to charge the battery pack, wherein the first charger comprises a first housing containing at least one rechargeable battery configured to supply charging current that charges the at least one rechargeable battery of the battery pack,wherein the first charger is configured to charge the battery pack while the battery pack is attached to the tool main body,wherein the at least one rechargeable battery of the first charger has a charge storage capacity that is larger than the charge storage capacity of the at least one rechargeable battery of the battery pack, andfurther comprising a second charger configured to charge the at least one rechargeable battery of the first charger, the second charger comprising a second housing containing a charging controller, the first housing being removably mountable on the second housing to charge the at least one rechargeable battery of the first charger.
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Abstract
An electric power tool system comprises a tool main body, a battery pack detachably attached to the tool main body, and a first charger that charges the battery pack. The first charger comprises a rechargeable battery that supplies current to at least one rechargeable battery of the battery pack. The at least one rechargeable battery of the first charger preferably has a larger charge storage capacity than the at least one rechargeable battery of the battery pack.
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Citations
19 Claims
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1. An electric power tool system comprising:
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a tool main body; a battery pack detachably attached to the tool main body and comprising at least one rechargeable battery; and a first charger configured to charge the battery pack, wherein the first charger comprises a first housing containing at least one rechargeable battery configured to supply charging current that charges the at least one rechargeable battery of the battery pack, wherein the first charger is configured to charge the battery pack while the battery pack is attached to the tool main body, wherein the at least one rechargeable battery of the first charger has a charge storage capacity that is larger than the charge storage capacity of the at least one rechargeable battery of the battery pack, and further comprising a second charger configured to charge the at least one rechargeable battery of the first charger, the second charger comprising a second housing containing a charging controller, the first housing being removably mountable on the second housing to charge the at least one rechargeable battery of the first charger. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19)
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3. An electric power tool system comprising:
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a tool main body; a battery pack detachably attached to the tool main body and comprising at least one rechargeable battery; and a first charger configured to charge the battery pack, wherein the first charger comprises at least one rechargeable battery configured to supply charging current that charges the at least one rechargeable battery of the battery pack, wherein the at least one rechargeable battery of the first charger has a charge storage capacity that is larger than the charge storage capacity of the at least one rechargeable battery of the battery pack, wherein the first charger is configured to charge the battery pack while the battery pack is attached to the tool main body, and wherein the at least one rechargeable battery of the first charger has a maximum allowable current that is less than the maximum allowable current of the at least one rechargeable battery of the battery pack.
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17. An electric power tool system comprising:
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a tool main body; a battery pack comprising (i) a first set of connection terminals configured to detachably attach to the tool main body, (ii) a second set of connection terminals and (iii) a plurality of first rechargeable battery cells electrically connected to the first and second sets of connection terminals; a first charger having a set of connection terminals configured to detachably attach to the second set of connection terminals of the battery pack while the first set of connection terminals of the battery pack is attached to the tool main body, the first charger comprising a plurality of second rechargeable battery cells configured to supply current to the plurality of first rechargeable battery cells to recharge the plurality of first rechargeable battery cells while the battery pack is attached to the tool main body, and a second charger having a set of connection terminals, wherein the set of connection terminals of the first charger is configured to detachably contact the set of connection terminals of the second charger to charge the plurality of second rechargeable battery cells in the first charger when the first charger is not attached to the battery pack, and wherein the first charger has a charge storage capacity that is greater than the charge storage capacity of the battery pack. - View Dependent Claims (18)
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Specification