Battery pack and treatment system

Patent metadata

Field	Value
Publication number	US-12062769-B2
Application number	US-202016869857-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	May 10, 2019
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A battery pack supplies an electrically driven treatment apparatus with an electric driving power, and includes: a stack limiting structure; a plurality of pouch cells, wherein the pouch cells are disposed in a stack, wherein the stack is disposed within the stack limiting structure; an outer temperature sensor, wherein the outer temperature sensor is disposed and configured for measuring an outer temperature of the stack outside the stack at an edge of the stack or the stack limiting structure, and/or outside the stack limiting structure; and a control device. The control device is configured for comparison of the measured outer temperature and/or a quantity based on the measured outer temperature to at least one temperature comparative value. The at least one temperature comparative value is a function of at least one of the pouch cells. The control device is configured for controlling the battery pack in response to a result of the comparison.

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 stack limiting structure;
a plurality of pouch cells having cell tabs, wherein the pouch cells are disposed in a stack, wherein the stack is disposed within the stack limiting structure;
an outer temperature sensor, wherein the outer temperature sensor is disposed and configured for measuring an outer temperature of the stack outside the stack at an edge of the stack or the stack limiting structure, and/or outside the stack limiting structure; and
a control device, wherein the control device is configured for comparison of the measured outer temperature and/or a quantity based on the measured outer temperature to at least one temperature comparative value;
a plurality of battery pack contacts, wherein the battery pack contacts are configured for electrical connection of the battery pack and the treatment apparatus with each other for supplying the treatment apparatus with electric driving power from the battery pack; and
a battery pack contact holder, wherein the battery pack contact holder holds the battery pack contacts and the outer temperature sensor, and wherein the battery pack contact holder is disposed on the stack limiting structure, wherein
the at least one temperature comparative value is a function of at least one of the pouch cells,
the control device is configured for controlling the battery pack in response to a result of the comparison,
the control device is configured for controlling an output of the electric driving power and/or an input of electric charging power and is disposed on a side of the stack, and
the outer temperature sensor and the plurality of battery pack contacts are disposed on an opposite half averted side of the stack or the stack limiting structure from the side of the stack on which the control device is disposed.

2. The battery pack according to claim 1 , wherein at least one of:
the outer temperature sensor is disposed on an edge of an outermost one of the pouch cells, and
the at least one temperature comparative value is a function of an outermost one of the pouch cells.

3. The battery pack according to claim 1 , wherein
the stack limiting structure has a stack housing.

4. The battery pack according to claim 1 , the battery pack further comprising:
an inner temperature sensor, wherein the inner temperature sensor is disposed and configured for measuring an inner temperature of the stack in the stack, and
wherein the control device is configured for comparison of the measured inner temperature and/or a quantity based on the measured inner temperature to at least one further temperature comparative value, wherein
the at least one further temperature comparative value is a function of at least one of the pouch cells, and
the control device is configured for controlling the battery pack in response to a result of the comparison.

5. The battery pack according to claim 4 , the battery pack further comprising:
a sensor arrangement, wherein
the sensor arrangement is disposed in the stack,
the sensor arrangement extends across a major part of a surface of the pouch cells and is configured such that a height of the stack across the major part that the sensor arrangement extends is approximately equal, and
the sensor arrangement has the inner temperature sensor.

6. The battery pack according to claim 5 , wherein
the sensor arrangement has a pressure sensor, wherein the pressure sensor is configured for detecting a pressure force acting on the pouch cells, and
the control device is configured for comparison of the detected pressure force and/or a quantity based on the detected pressure force to a pressure limit value, wherein
the pressure limit value is predetermined by at least one of the pouch cells, and
the control device is configured for controlling the battery pack in response to a result of the comparison.

7. The battery pack according to claim 1 , the battery pack further comprising:
a battery pack housing, wherein the pouch cells, and the stack limiting structure, are disposed within the battery pack housing; and
at least one air cooling circuit including a number of air inlet openings and a number of air outlet openings in the battery pack housing for a cooling air flow from the number of air inlet openings onto the pouch cells, passing to the number of air outlet openings, for cooling the pouch cells, wherein
the outer temperature sensor is disposed in the air cooling circuit between the number of air inlet openings and the number of air outlet openings facing the number of air inlet openings and/or facing the number of air outlet openings.

8. The battery pack according to claim 1 , wherein
the stack limiting structure has a thermal connection to the pouch cells and is thermally conducting.

9. The battery pack according to claim 1 , the battery pack further comprising:
at least one thermal insulation, wherein the at least one thermal insulation is disposed respectively between two of the pouch cells and extends across a major part of the surface of the pouch cells.

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, and
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. The treatment system according to claim 11 , wherein
the treatment apparatus has a battery accommodation, wherein the battery accommodation is configured for accommodating the battery pack.

13. The treatment system according to claim 11 , wherein
the treatment apparatus is one of: a saw, a pole pruner, a clearing saw, a brush cutter, hedge shears, a hedge cutter, a blower device, a leaf blower, a lopper, a cutoff grinder, a sweeper device, a sweeper roller, a sweeper brush, a lawn mower, a dethatcher or a grass trimmer.

Assignees

• Stihl Ag & Co Kg Andreas
• Murata Manufacturing Co

Inventors

• Sauerteig Daniel
• Scholl Julien
• Sato Takayuki
• Misawa Daiki
• Von Hofen Malte
• Chinen Atsushi
• Wagner Daniel
• Wilka Marcel

Classifications

• H01M50/247

  specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M10/658

  by thermal insulation or shielding · CPC title

• H01M50/224

  Metals · CPC title

• H01M50/296

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title