EP4186120A1 - Batterie pour machine-outil portative - Google Patents

Batterie pour machine-outil portative

Info

Publication number
EP4186120A1
EP4186120A1 EP21742133.8A EP21742133A EP4186120A1 EP 4186120 A1 EP4186120 A1 EP 4186120A1 EP 21742133 A EP21742133 A EP 21742133A EP 4186120 A1 EP4186120 A1 EP 4186120A1
Authority
EP
European Patent Office
Prior art keywords
battery pack
pouch
pouch cell
pressure equalization
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21742133.8A
Other languages
German (de)
English (en)
Inventor
Moses Ender
Nora MARTINY
Robert Stanger
Klaus Hauser
Matthias Lepiorz
Bernd Ziegler
Kathrin SAX
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP4186120A1 publication Critical patent/EP4186120A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack for an electric hand-held power tool, the battery pack having a housing with at least one pouch cell arranged therein, a deformable pressure equalization element being arranged parallel to the pouch cell in such a way that the pressure equalization element yields to an increase in volume of the pouch cell can.
  • a battery pack of the type mentioned above is known from EP 3499 600 A1.
  • WO 2014/206323 A1 discloses a battery pack for a portable power tool, the battery pack having a plurality of battery cells supported within a housing in an elastically deformable frame which encompasses at least part of each battery cell, each elastically deformable frame side edge in a Manner includes that a mechanical protection for the sides of each of the plurality of battery cells is provided.
  • DE 10 2014 226 260 A1 describes a battery cell housing for accommodating an electrode assembly of a battery cell with an anode, a cathode and an electrolyte positioned between the anode and the cathode, comprising a base area, side walls connected thereto and a battery cell housing on its surface Closing cover, wherein the bottom surface, at least one side wall or the cover of the battery cell housing has a corrugated or folded structure at least in some areas, such that the battery cell housing elastically undergoes a change in volume due to the corrugated or folded structure.
  • the object is achieved in that the pressure compensation element is profiled so that despite the increase in volume of the pouch cell, a convection current can pass along the pouch cell.
  • the invention includes the finding that in battery packs of the prior art, the battery cells are cast into a resin hardener mixture under prestress or are delimited by solid pressure equalization elements throughout. It has been observed that at one Increase in volume of the pouch cells - the so-called swelling - can lead to mechanical stresses and forces, especially on the housing. A convection along the pouch cells, which is advantageous for the pouch cells, typically comes to a standstill in the course of the swelling. In particularly extreme cases, the battery cells themselves, but also the housing of the battery pack, can be damaged. So-called swelling has so far been unavoidable and occurs in particular in pouch cells due to pouch cell-specific cell aging.
  • the pressure compensation element is profiled according to the invention, a convection current can pass along the pouch cell despite the increase in volume of the pouch cell.
  • a cooling of the pouch cell - be it by free and/or by forced convection - is therefore still possible in principle.
  • the cavities preferably also serve to cool the pouch cell.
  • the battery pack can have an electric fan that forces a convection current along the pouch cell.
  • the pressure compensation element is profiled exclusively within a projection surface of the pouch cell, which is oriented perpendicular to a stacking direction of the pouch cell. This allows a particularly compact layer structure.
  • the pressure compensation element has a wavy, trapezoidal or honeycomb profile.
  • the pressure equalization element can have a mesa-shaped, rastered surface profile. It has turned out to be advantageous if the pressure equalization element is free of a continuously straight air duct, in particular free of a continuously straight air duct perpendicular to the stacking direction.
  • the pressure compensation element can have one or more openings in order to promote a convection flow.
  • the pressure compensation element has a material elasticity that is greater than a cell elasticity of the pouch cells.
  • the pressure compensation element is reversibly and elastically deformable.
  • the pressure compensation element is reversibly and elastically deformable, at least in the stacking direction.
  • the pressure compensation element is an elastomer or has one.
  • the pressure compensation element is preferably selected from the group: polyurethane, butadiene rubber, butyl rubber, ethylene-propylene-diene rubber, silicone rubber.
  • the pressure compensation element has a phase change material.
  • the pressure compensation element can have paraffin-filled chambers that can buffer temporary temperature peaks within the battery pack—which typically occur when there is a high current drain.
  • the pressure compensation element is provided in the form of at least one insertion element that is or is to be inserted between the pouch cells. If a plurality or a large number of pouch cells is provided, then there is preferably one insertion element between adjacent pouch cells.
  • the insert elements are preferably of flat design, with one surface being able to be essentially the same size as the surface of a respective pouch cell. It has turned out to be advantageous if the pressure compensation element does not overlap the pouch cell.
  • the pressure compensation element is located between at least one of the pouch cells and a wall of the housing. If the pressure compensation element is provided in the form of at least one insert element, this can be arranged between an outer pouch cell and the wall of the housing.
  • each of the pouch cells is adjacent to the pressure equalization element on both sides.
  • the pouch cells are particularly preferably designed as lithium polymer cells. It has proven to be advantageous if the pressure compensation element is an electrical insulator. In a particularly preferred embodiment, the no-load voltage of the battery pack is limited to 60 V DC.
  • FIG. 1A shows a first preferred exemplary embodiment of a battery pack according to the invention in an intact state, with the pressure equalization element being provided in the form of an insert element, and
  • Fig. 1B shows the battery pack in an inflated state.
  • FIGS. 1A, 1B A schematic representation of a particularly preferred exemplary embodiment of a battery pack 10 according to the invention is shown in FIGS. 1A, 1B.
  • the battery pack 10 is used for the electrical supply of an electric hand tool, not shown here.
  • the battery pack 10 has a housing—symbolized here by two housing walls 9, for example—with a pouch cell 1 arranged therein.
  • a plurality of pouch cells can be provided.
  • FIG. 1A shows the battery pack 10 with the pouch cell 1 intact.
  • FIG. 1B shows the battery pack 10 with the pouch cell 1 inflated.
  • a pressure compensation element 8, 8' is located between the pouch cell 1 and a respective housing wall 9.
  • the pressure equalization elements 8, 8' are designed as insert elements that are reversibly and elastically deformable, at least in the stacking direction SR, so that the pressure equalization elements 8, 8' can counteract an increase in volume of the pouch cell 1 (cf. Fig. 1 B) can give way.
  • the pressure equalization elements 8, 8' extend in their longitudinal direction LR parallel to a stacking direction SR of the pouch cell 1. Looking at FIGS. 1 A and B together, it can be seen that both pressure equalization elements 8, 8'--regardless of the state of the pouch cell 1--are always at least partially in contact with the pouch cell 1.
  • the pressure compensation elements 8, 8' are profiled, so that despite the increase in volume of the pouch cell 1 (cf. FIG. 1B), a convection current KS can pass along the pouch cell 1 on both sides.
  • the pressure compensation elements 8, 8' have a trapezoidal profile. Due to the trapezoidal profiling of the pressure compensation elements 8, 8', open volumes 7 remain, even if the pouch cell swells (cf. FIG. 1B), through which the said convection current KS can pass.
  • openings 5, 5' advantageously formed in the pressure equalization elements 8, 8' are only shown in dashed lines. The openings 5, 5' enable or promote the convection current KS.
  • the pressure compensation element 8 is profiled exclusively in a projection area PF (shown as a line due to the two-dimensional representation) of the pouch cell 1.
  • the projection surface PF runs perpendicular to the stacking direction SR of the pouch cell 1 ist.
  • the pouch cell 1 is free of pressure equalization elements on its respective short end faces (left and right in FIGS. 1A, 1B).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne une batterie destinée à une machine-outil portative électrique, cette batterie présentant un boîtier dans lequel est disposée au moins une cellule en sachet souple. Un élément de compensation de pression déformable est disposé parallèlement à la cellule en sachet souple de telle sorte que l'élément de compensation de pression peut se déformer sous l'effet d'une augmentation de volume de la cellule en sachet souple, l'élément de compensation de pression étant profilé de sorte qu'un courant de convection peut passer le long de la cellule en sachet souple malgré l'augmentation de volume de cette dernière.
EP21742133.8A 2020-07-22 2021-07-12 Batterie pour machine-outil portative Pending EP4186120A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20187152.2A EP3944402A1 (fr) 2020-07-22 2020-07-22 Bloc accumulateur pour une machine-outil portative
PCT/EP2021/069337 WO2022017853A1 (fr) 2020-07-22 2021-07-12 Batterie pour machine-outil portative

Publications (1)

Publication Number Publication Date
EP4186120A1 true EP4186120A1 (fr) 2023-05-31

Family

ID=71741674

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20187152.2A Withdrawn EP3944402A1 (fr) 2020-07-22 2020-07-22 Bloc accumulateur pour une machine-outil portative
EP21742133.8A Pending EP4186120A1 (fr) 2020-07-22 2021-07-12 Batterie pour machine-outil portative

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20187152.2A Withdrawn EP3944402A1 (fr) 2020-07-22 2020-07-22 Bloc accumulateur pour une machine-outil portative

Country Status (4)

Country Link
US (1) US20230275303A1 (fr)
EP (2) EP3944402A1 (fr)
CN (1) CN115868066A (fr)
WO (1) WO2022017853A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT526110B1 (de) * 2022-05-13 2024-05-15 Avl List Gmbh Batteriepack und Kraftfahrzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284929A1 (fr) * 2009-08-14 2011-02-16 SB LiMotive Co., Ltd. Module de batterie

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8673480B2 (en) * 2010-07-12 2014-03-18 GM Global Technology Operations LLC Support feature for joining of battery cell tabs
EP3014690B1 (fr) 2013-06-26 2020-03-11 Techtronic Power Tools Technology Limited Bloc-batterie, batterie d'outil et outil actionné par batterie
DE102014226260A1 (de) 2014-12-17 2016-06-23 Robert Bosch Gmbh Batteriezelle, Batteriemodul und Verwendung derselben
US20170237112A1 (en) * 2016-01-21 2017-08-17 24M Technologies, Inc. Porous spacers for electrochemical cells
EP3656004A1 (fr) * 2017-07-21 2020-05-27 QuantumScape Corporation Gestion de pression de batterie active et passive
EP3499600A1 (fr) 2017-12-18 2019-06-19 HILTI Aktiengesellschaft Batterie pour une machine-outil portative
EP3883040A1 (fr) * 2020-03-19 2021-09-22 Hilti Aktiengesellschaft Agencement de pochettes de cellules

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2284929A1 (fr) * 2009-08-14 2011-02-16 SB LiMotive Co., Ltd. Module de batterie

Also Published As

Publication number Publication date
EP3944402A1 (fr) 2022-01-26
US20230275303A1 (en) 2023-08-31
CN115868066A (zh) 2023-03-28
WO2022017853A1 (fr) 2022-01-27

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