Structure for a battery pack for supplying an electrically driven work appliance with electrical drive power, battery pack, work system and method for producing a battery pack

Patent metadata

Field	Value
Publication number	US-12148940-B2
Application number	US-202117449274-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Sep 30, 2020
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A structure for a battery pack for supplying an electrically driven work appliance with electrical drive power has a number of cell holder parts. The number of cell holder parts is designed for holding battery cells. At least two cell holder parts are designed for arrangement together in a holding arrangement and, in the holding arrangement, for jointly holding the battery cells. The cell holder parts, in the holding arrangement, jointly form at least a predominant part of a filling mould. The filling mould is designed for filling with a protective material for enclosing at least a part of a battery pack electronics unit. Additionally or alternatively, the structure has at least one cast assembly, wherein the cast assembly unites one of the number of cell holder parts and at least one casted-in cell contactor. The cell contactor is designed for contacting at least one cell terminal of at least one of the held battery cells.

First claim

The invention claimed is:

1. A structure for a battery pack for supplying an electrically driven work appliance with electrical drive power, the structure comprising:
a number of cell holder parts, wherein the number of cell holder parts is designed for holding battery cells,
wherein
the number of cell holder parts comprises at least two cell holder parts,
at least two of the cell holder parts are designed for arrangement together in a holding arrangement and, in the holding arrangement, for jointly holding the battery cells,
the cell holder parts, in the holding arrangement, jointly form at least a predominant part of a filling mould,
the filling mould is designed for filling with a protective material for enclosing at least a part of a battery pack electronics unit, and
the structure has at least one cast assembly, wherein the cast assembly unites one of the number of cell holder parts and at least one casted-in cell contactor, wherein the cell contactor is designed for contacting at least one cell terminal of at least one of the held battery cells.

2. The structure according to claim 1 ,
wherein the cell holder parts are designed for arrangement in an arrangement direction and for holding elongate battery cells with cell longitudinal axes that are not orthogonal with respect to the arrangement direction.

3. The structure according to claim 1 , wherein at least one of:
the cell holder parts are designed for arrangement in an arrangement direction, and wherein the filling mould is designed for receiving at least a part of the battery pack electronics unit, and for filling with the protective material, in a receiving and filling direction which is non-parallel with respect to the arrangement direction,
the cell holder parts are designed for arrangement in an arrangement direction, and wherein the filling mould is designed for receiving at least a part of the battery pack electronics unit having at least one circuit board with a board plane that is not orthogonal with respect to the arrangement direction, or
the filling mould is designed for receiving at least a part of the battery pack electronics unit having at least one circuit board with a board plane that is not orthogonal with respect to a peripheral side of at least one of the cell holder parts.

4. The structure according to claim 1 , wherein
at least one of the cell holder parts has a contacting side for contacting of at least one cell terminal of at least one of the held battery cells, and
the cell holder parts jointly have at least one peripheral side which differs from the contacting side, wherein the filling mould is arranged at the peripheral side.

5. The structure according to claim 1 , wherein
the cast assembly has a cast element,
the cast element has the one of the number of cell holder parts and encloses the cell contactor and has at least one cutout,
the cutout leaves free a part of an outer side and a part of an inner side, which is situated opposite the outer side, of the cell contactor for producing a cohesive connection to the cell terminal for the contacting of the cell terminal.

6. The structure according to claim 1 , wherein
the cast assembly has at least one casted-in electrical line,
the electrical line is designed for electrically connecting the cell contactor to a battery pack electronics unit.

7. The structure according to claim 6 , wherein
the cell contactor is arranged at a contacting side of the one of the number of cell holder parts, and
the electrical line runs at least in certain sections along a peripheral side, which differs from the contacting side, of the one of the number of cell holder parts.

8. The structure according to claim 7 , wherein
the cell contactor is a metal sheet, and/or
the electrical line is a metal sheet.

9. The structure according to claim 1 , wherein
the cast assembly unites at least one casted-in pack contactor,
the pack contactor is designed for contacting at least one appliance contactor of the work appliance.

10. The structure according to claim 1 , wherein
the cast assembly has a cast element,
the cast element has the cell holder part and encloses the cell contactor and is in itself inter face-free.

11. The structure according to claim 1 , wherein
the cast assembly is an injection-moulded assembly, and
the cell contactor is injection-moulded.

12. A battery pack for supplying an electrically driven work appliance with electrical drive power, the battery pack comprising:
the structure according to claim 1 ; and
battery cells, wherein the battery cells are held by way of the number of cell holder parts,
wherein
the structure has a battery pack electronics unit and a protective material, wherein the protective material is filled into the filling mould formed at least predominantly by way of the cell holder parts in the holding arrangement jointly, and wherein the filled protective material encloses at least a part of the battery pack electronics unit, and/or
the at least one cell terminal of the at least one of the held battery cells is contacted by way of the casted-in cell contactor of the cast assembly uniting one of the number of cell holder parts and the at least one casted-in cell contactor.

13. The battery pack according to claim 12 ,
wherein the battery pack electronics unit is a measurement, power, user interface and/or transmission electronics unit.

14. A work system, comprising:
the battery pack according to claim 12 ;
an electrically driven work appliance,
wherein the battery pack and the work appliance are designed for electrical connection to one another for supplying the work appliance with electrical drive power from the battery pack.

15. A method for producing a battery pack, the method comprising the steps of:
arranging a number of cell holder parts together in a holding arrangement for jointly holding the battery cells, and filling a protective material into the filling mould, at least predominantly formed via the cell holder parts in the holding arrangement jointly, in order to enclose at least part of a battery pack electronics unit, and
producing at least one cast assembly, holding the battery cells via the number of cell holder parts, and contacting the at least one cell terminal of the at least one of the held battery cells by way of a casted-in cell contactor of the cast assembly uniting one of the number of cell holder parts and the at least one casted-in cell contactor.

16. A structure for a battery pack for supplying an electrically driven work appliance with electrical drive power, the structure comprising:
a number of cell holder parts, wherein the number of cell holder parts is designed for holding battery cells,
wherein
the structure has at least one cast assembly, wherein the cast assembly unites one of the number of cell holder parts and at least one casted-in cell contactor, wherein the cell contactor is designed for contacting at least one cell terminal of at least one of the held battery cells,
wherein
the cast assembly has at least one casted-in electrical line, the line is designed for electrically connecting the cell contactor to a battery pack electronics unit,
wherein
the cell contactor is arranged at a contacting side of the cell holder part, and the line runs at least on certain sections along a peripheral side, which differs from the contacting side, of the cell holder part.

17. A battery pack, for supplying an electrically driven work appliance with electrical drive power, the battery pack comprising:
a structure for the battery pack for supplying

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Saemann Christian
• Schumayer Florian

Classifications

• H01M50/519

  comprising printed circuit boards [PCB] · CPC title

• H01M50/514

  Methods for interconnecting adjacent batteries or cells · CPC title

• H01M50/507

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M50/528

  Fixed electrical connections, i.e. not intended for disconnection · CPC title

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title