Hand-held power tool and rechargeable battery pack for a hand-held power tool

Patent metadata

Field	Value
Publication number	US-10797281-B2
Application number	US-201716091299-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Apr 5, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A rechargeable battery pack for a hand-held power tool, including a rechargeable battery pack housing, the rechargeable battery pack housing accommodating at least two rechargeable battery cells. The rechargeable battery pack is mechanically and electrically connectable to a hand-held power tool and/or to a charging device via an interface. The interface includes contact elements for electrically and/or mechanically contacting corresponding countercontact elements on the hand-held power tool and/or corresponding countercontact elements on the charging device. It is provided that the rechargeable battery pack housing includes at least one first rechargeable battery cell string for accommodating at least one first rechargeable battery cell, and at least one second rechargeable battery cell string for accommodating at least one second rechargeable battery cell. The rechargeable battery pack housing includes at least two electrical contact elements for each rechargeable battery cell string.

First claim

What is claimed is:

1. A hand-held power tool, comprising:
a drive motor situated in a housing for driving a mechanical interface;
an electronics system situated in the housing; a rechargeable battery pack that is detachably connectable to the hand-held power tool; and
an interface with countercontact elements for electrically and/or mechanically contacting contact elements of the rechargeable battery pack, wherein the interface includes at least four electrical countercontact elements, the countercontact elements being wired together so that the drive motor is supplied with the required voltage when the rechargeable battery pack is inserted;
wherein the rechargeable battery pack for the hand-held power tool includes:
a rechargeable battery pack housing, the rechargeable battery pack housing accommodating at least two rechargeable battery cells; and
a battery pack interface for establishing a mechanical and electrical connection of the rechargeable battery pack to the hand-held power tool and/or a charging device;
wherein the battery pack interface includes the contact elements for electrically and/or mechanically contacting corresponding countercontact elements on the hand-held power tool and/or corresponding countercontact elements on the charging device, and
wherein the rechargeable battery pack housing includes at least one first rechargeable battery cell string for accommodating multiple first rechargeable battery cells, that are electroconductively connected to one another in series, and at least one second rechargeable battery cell string for accommodating multiple second rechargeable battery cells that are electroconductively connected to one another in series, the rechargeable battery pack housing including at least two electrical contact elements for each rechargeable battery cell string.

2. The hand-held power tool of claim 1 , wherein the number of contact elements of the interface of the rechargeable battery pack corresponds at least to the number of countercontact elements of the interface of the hand-held power tool.

3. The hand-held power tool of claim 1 , wherein the operating voltage of the hand-held power tool is a multiple of the voltage provided by at least one of the first and second rechargeable battery cell strings.

4. The hand-held power tool of claim 1 , wherein a first countercontact element of the hand-held power tool is connected to a third countercontact element of the hand- held power tool, and/or a second countercontact element of the hand-held power tool is connected to a fourth countercontact element of the hand-held power tool, when the rechargeable battery pack is inserted,
wherein the drive motor is connected to the first and the third countercontact elements and/or to the second and the fourth countercontact elements via the electronics system.

5. The hand-held power tool of claim 1 , wherein a second countercontact element of the hand-held power tool is connected to a third countercontact element of the hand-held power tool when the rechargeable battery pack is inserted, the drive motor being connected to the first and the fourth countercontact elements.

6. A charging device for charging a rechargeable battery pack, comprising:
an interface with countercontact elements for electrically and/or mechanically contacting contact elements of the rechargeable battery pack, wherein the interface includes at least four electrical countercontact elements, the countercontact elements being wired to one another so that all rechargeable battery cells in the-rechargeable battery pack are charged when the rechargeable battery pack is electrically connected to the charging device;
wherein the rechargeable battery pack includes:
a rechargeable battery pack housing, the rechargeable battery pack housing accommodating at least two rechargeable battery cells; and
a battery pack interface for establishing a mechanical and electrical connection of the rechargeable battery pack to a hand-held power tool and/or the charging device;
wherein the battery pack interface includes the contact elements for electrically and/or mechanically contacting corresponding countercontact elements on the hand-held power tool and/or corresponding countercontact elements on the charging device, and
wherein the rechargeable battery pack housing includes at least one first rechargeable battery cell string for accommodating multiple first rechargeable battery cells, that are electroconductively connected to one another in series, and at least one second rechargeable battery cell string for accommodating multiple second rechargeable battery cells that are electroconductively connected to one another in series, the rechargeable battery pack housing including at least two electrical contact elements for each rechargeable battery cell string.

7. the charging device of claim 6 , wherein the number of the countercontact elements of the interface of the charging device corresponds to the number of contact elements of the interface of the rechargeable battery pack.

8. The hand-held power tool of claim 1 , wherein the electronics system is configured to recognize and/or control the rechargeable battery pack that is connected via the interface of the hand-held power tool.

9. The hand-held power tool of claim 1 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string each include five rechargeable battery cells that are electroconductively connected in series to one another.

10. The hand-held power tool of claim 1 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string each include ten rechargeable battery cells that are electroconductively connected in series to one another.

11. The hand-held power tool of claim 1 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string are situated within the rechargeable battery pack housing electrically insulated from one another.

12. The hand-held power tool of claim 1 , wherein, when the rechargeable battery pack is inserted, the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string are electroconductively connected to one another in a parallel or series connection so that the operating voltage required by the hand-held power tool is present.

13. The hand-held power tool of claim 1 , wherein the rechargeable battery pack housing includes at least one cell holder for accommodating the at least one first rechargeable battery cell string and/or the at least one second rechargeable battery cell string.

14. The hand-held power tool of claim 13 , wherein the cell holder directly forms the at least one first rechargeable battery cell string and/or the at least one second rechargeable battery cell string.

15. The charging device of claim 6 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string each include five rechargeable battery cells that are electroconductively connected in series to one another.

16. The charging device of claim 6 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell string each include ten rechargeable battery cells that are electroconductively connected in series to one another.

17. The charging device of claim 6 , wherein the at least one first rechargeable battery cell string and the at least one second rechargeable battery cell stri

Assignees

• Bosch Gmbh Robert

Inventors

• Dietel Juergen

Classifications

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H01M50/213 Primary

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• H01M10/46 Primary

  Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) · CPC title

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title