Battery pack, treatment system and method for the production of a battery pack

Patent metadata

Field	Value
Publication number	US-12119684-B2
Application number	US-202016869824-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	May 10, 2019
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A battery pack supplies an electrically driven treatment apparatus with an electric driving power and includes a plurality of accumulator cells having cell contacts; at least one circuit board electrically connected to the cell contacts; and a battery pack housing having a first battery pack housing part and a second battery pack housing part. The first battery pack housing part and the second battery pack housing part are closed by each other. The accumulator cells are disposed within the battery pack housing. The cell contacts and the circuit board are disposed within the second battery pack housing part. The second battery pack housing part is configured as a mold for a casting compound, and the cell contacts and the at least one circuit board are enclosed by the casting compound.

First claim

What is claimed is:

1. A battery pack for supplying an electrically driven treatment apparatus with an electric driving power, the battery pack comprising:
a plurality of accumulator cells having cell contacts;
at least one circuit board electrically connected to the cell contacts; and
a battery pack housing, wherein
the battery pack housing has a first battery pack housing part and a second battery pack housing part,
the first battery pack housing part and the second battery pack housing part are closed by each other,
the accumulator cells are disposed within the battery pack housing,
the cell contacts and the at least one circuit board are disposed within the second battery pack housing part, and
the battery pack housing is configured to protect the accumulator cells and the at least one circuit board from physical contact wherein
the second battery pack housing part is configured as a mold for a casting compound,
the cell contacts and the at least one circuit board are enclosed by the casting compound,
the accumulator cells have cell shells,
the casting compound reaches at least up to the cell shells,
the accumulator cells are pouch cells,
the cell contacts are cell tabs, and
the cell shells are partially not enclosed by the casting compound to allow gas to escape from the cell shells.

2. The battery pack according to claim 1 , wherein
the first battery pack housing part is a housing container, and
the second battery pack housing part is a housing cover.

3. The battery pack according to claim 1 , wherein at least one of:
the casting compound reaches up to an end adjacent to the first battery pack housing part of the second battery pack housing part, or
the casting compound reaches at least up to an end adjacent to the second battery pack housing part of the first battery pack housing part.

4. The battery pack according to claim 1 , wherein
the cell contacts and the at least one circuit board are enclosed by the casting compound in a common casting block.

5. The battery pack according to claim 1 , wherein
the accumulator cells are configured and disposed in a cell block such that the cell contacts are disposed on a common contact side of the cell block.

6. The battery pack according to claim 5 , wherein
the at least one circuit board is disposed on the contact side.

7. The battery pack according to claim 1 , wherein at least one of:
the at least one circuit board holds measurement electronics, wherein
the measurement electronics are configured for measuring properties of the accumulator cells,

the at least one circuit board holds power electronics, wherein
the power electronics are configured for controlling output of the electric driving power from the battery pack and/or an input of electric charging power to the battery pack, or

the at least one circuit board holds user interface electronics, wherein
the user interface electronics are configured for interaction with a user, and/or holds transmission electronics, wherein
the transmission electronics are configured for wireless transmission of at least one operating parameter and/or operating condition.

8. The battery pack according to claim 1 , the battery pack further comprising:
a plurality of battery pack contacts, wherein
the battery pack contacts are configured for electrical connection of the battery pack and the treatment apparatus together for supplying the treatment apparatus with the electric driving power from the battery pack and disposed on an end remote from the second battery pack housing part of the first battery pack housing part.

9. The battery pack according to claim 1 , wherein
the first battery pack housing part has a number of air openings, and
the number of air openings are disposed on an end adjacent to the second battery pack housing part of the first battery pack housing part.

10. The battery pack according to claim 1 , wherein at least one of:
the battery pack has a maximum electric driving power of a minimum of 1 kW and/or of a maximum of 10 kW,
the battery pack has a nominal voltage of a minimum of 10 V and/or of a maximum of 100 V,
the battery pack has a maximum energy content of a minimum of 100 Wh and/or of a maximum of 1000 Wh,
the battery pack has a mass of a minimum of 0.5 kg and/or of a maximum of 10 kg, or
the battery pack has a height of a minimum of 2.5 cm and/or of a maximum of 10 cm, a width of a minimum of 5 cm and/or of a maximum of 20 cm, and a depth of a minimum of 7.5 cm and/or of a maximum of 30 cm.

11. A treatment system, comprising:
a battery pack according to claim 1 , and
an electrically driven treatment apparatus, wherein
the battery pack and the treatment apparatus are configured for electrical connection with each other for supplying the treatment apparatus with electric driving power from the battery pack.

12. A method for producing the battery pack of claim 1 for supplying an electrically driven treatment apparatus with electric driving power, the method comprising the steps of:
a) disposing cell contacts of the plurality of accumulator cells and the at least one circuit board electrically connected to the cell contacts, within the second battery pack housing part of the battery pack housing, wherein
the second battery pack housing part is configured as a mold for the casting compound,
the accumulator cells have cell shells,
the accumulator cells are pouch cells, and
the cell contacts are cell tabs;

b) enclosing the cell contacts and the at least one circuit board by the casting compound, wherein
the casting compound reaches at least up to the cell shells; and

c) disposing the accumulator cells within the battery pack housing and closing the second battery pack housing part and the first battery pack housing part of the battery pack housing by each other.

13. The method according to claim 12 , wherein the step c) comprises:
disposing and closing while the casting compound is in a liquid state; and
the method further comprises:
d) hardening the casting compound in a solid state.

14. A battery pack for supplying an electrically driven treatment apparatus with an electric driving power, the battery pack comprising:
a plurality of accumulator cells having cell contacts;
at least one circuit board electrically connected to the cell contacts; and
a battery pack housing, wherein
the battery pack housing has a first battery pack housing part and a second battery pack housing part,
the first battery pack housing part and the second battery pack housing part are closed by each other, and
the accumulator cells are disposed within the battery pack housing and the at least one circuit board is disposed within the battery pack housing, wherein
the second battery pack housing part is a housing cover, the second battery pack housing part having at least one thread,
the first battery pack housing part is a housing container, the first battery pack housing part having at least one head abutment surface,
the head abutment surface is disposed on an end adjacent to and within 20 millimeters or less of the second battery pack housing part,
the battery pack has at least one screw,
the screw is screwed into the thread for mechanical connection of the second battery pack housing part and the first battery pack housing part to each other,
a screw head bears on the head abutment surface,
the first battery pack housing part has at least one groove to guide the battery pack in mechanical connection to the treatment apparatus, and
the groove extends on the head abutment surface in prolongation of the thread.

15.

Assignees

• Stihl Ag & Co Kg Andreas
• Murata Manufacturing Co

Inventors

• Sauerteig Daniel
• Scholl Julien
• Ozawa Kenichi
• Sato Takayuki
• Misawa Daiki
• Wagner Daniel
• Wilka Marcel
• Schurr Martin
• Bossmann Uwe
• Liepold Dirk

Classifications

• H02J7/575 Primary

  Parallel/serial switching of connection of batteries to charge or load circuit · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/516

  by welding, soldering or brazing · CPC title

• H01M50/519

  comprising printed circuit boards [PCB] · CPC title