WO2023052066A1 - Batterie pourvue d'un capteur de température et véhicule automobile - Google Patents

Batterie pourvue d'un capteur de température et véhicule automobile Download PDF

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Publication number
WO2023052066A1
WO2023052066A1 PCT/EP2022/074869 EP2022074869W WO2023052066A1 WO 2023052066 A1 WO2023052066 A1 WO 2023052066A1 EP 2022074869 W EP2022074869 W EP 2022074869W WO 2023052066 A1 WO2023052066 A1 WO 2023052066A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
cell
temperature sensor
battery cell
circuit board
Prior art date
Application number
PCT/EP2022/074869
Other languages
German (de)
English (en)
Inventor
Magdalena Frank
Kilian Friedrich
Manuel WINKLER
Andreas Ganser
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
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 Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO2023052066A1 publication Critical patent/WO2023052066A1/fr

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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • 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
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]

Definitions

  • the present invention relates to a battery with at least one battery cell and a temperature sensor and a motor vehicle with such a battery.
  • the welding lug or welding lug or a corresponding welded connection serves here only for mechanically holding or fastening the temperature sensor—and possibly other components arranged in its vicinity—and guides no current, voltage or data signals or a corresponding supply even when the battery is in operation. This may allow less stringent requirements to be placed on the weld as it does not affect the temperature measurement or determination. The performance or accuracy of the temperature measurement is therefore not dependent on the quality or precision of the welded joint, which in practice can typically be subject to greater fluctuations than the quality of the thermal connection of the temperature sensor to the battery cell via the thermally conductive compensating or contact element.
  • the welding tab and/or the contact element can act as a spring for holding the temperature sensor on the battery cell. The welding lug and/or the contact element can therefore ensure gapless contact between the temperature sensor and the top or bottom of the cell.
  • the arrangement proposed here allows a heat transfer or heat conduction path from the battery cell to the temperature sensor to be particularly short and direct. This enables a temperature measurement that is particularly accurate, reliable and responds quickly to temperature changes in the battery cell, that is to say that it reacts.
  • a further advantage of the present invention is that the cell top and/or the cell bottom can always be accessed particularly easily compared to the side wall, regardless of a specific arrangement or position of the battery cell in a cell assembly or on a housing wall of a battery housing.
  • a temperature sensor can thus be arranged on a specific or any battery cell in a particularly simple and space-saving manner, even in the case of a densely packed arrangement of a plurality of battery cells.
  • the two ends can be connected to one another or spaced apart from one another, for example, by a sloping center piece that equalizes the height between the speaking side of the battery cell and an upper side of the temperature sensor facing away from it, in particular in the longitudinal direction of the welding lug.
  • the arrangement or fastening of the welding lug or the second end of the welding lug proposed here enables the battery to be manufactured in a particularly simple, space-saving and robust manner.
  • the welding tab and thus also the temperature sensor can be attached to the respective battery cell independently of a cell carrier or cell contacting system (ZKS) or the like.
  • the flexible, heat-conducting contact element is adhesively connected to the battery cell and/or to the temperature sensor.
  • the contact element can therefore be fastened on one or both sides by means of an adhesive, or it can itself be made at least partially or in certain areas from an adhesive, ie an adhesive material.
  • a corresponding additional component or material for the connection can be saved by such an adhesive connection.
  • the temperature sensor can be arranged or attached to the battery cell in a particularly simple and space-saving manner in the manner proposed here.
  • a flexible printed circuit board is arranged on an upper side of the temperature sensor facing away from the battery cell between this and the end of the welding lug there, by which the temperature sensor is held.
  • This circuit board is arranged or connected to the temperature sensor in such a way that a temperature signal from the temperature sensor is or can be transported via the circuit board when the battery is in operation.
  • a temperature signal can be or include, for example, a raw signal measured or recorded by the temperature sensor or a preprocessed signal generated or derived therefrom, a data signal or the like.
  • the battery comprises a multiplicity of battery cells which are arranged with side walls facing one another.
  • a respective temperature sensor is arranged or fastened in the manner described only on a part, that is to say a subset of the battery cells.
  • the battery cells can thus be arranged in a cell assembly or cell module with longitudinal or vertical axes aligned parallel to one another, which can run parallel to the side walls.
  • the cell tops of the battery cells can be on one side of this cell assembly or cell module in the same imaginary plane arranged or extended. All cell tops can be accessible or exposed at this level, regardless of a packing density of the battery cells, so that a flexible arrangement of the at least one temperature sensor is made possible, as described.
  • a motor vehicle that has a battery according to the invention.
  • the battery according to the invention can in particular be a traction battery of the motor vehicle.
  • the motor vehicle according to the invention or its battery can have other parts or components, such as a housing in which the at least one battery cell is arranged, a cell contacting system for electrically contacting or connecting the battery cells, a control unit or BMS, power electronics and/or the like .
  • Such a motor vehicle can represent a particularly useful application of the present invention, since particularly high demands are placed on the battery there, the battery can be exposed to particularly high loads and load changes and a particularly wide range of ambient temperatures and improved temperature monitoring and safety of the battery here can offer particularly great potential for damage limitation or avoidance.
  • the battery according to the invention can also be used in other applications, areas of use or situations, for example in stationary facilities or systems, as a home or building battery and/or the like.
  • FIG. 2 shows a detailed schematic representation of a detail of a battery cell with a temperature sensor arranged thereon.
  • the battery 12 includes a plurality of battery cells 16 accommodated in a housing of the battery 12 .
  • the battery cells 16 can be, for example, standing cylindrical round cells, but other cell types or cell shapes are also possible.
  • the battery 12 also has battery electronics 18, which can be or include, for example, a control device, power electronics, a BMS, a sensor monitoring or sensor signal evaluation device and/or the like. In the present example, two of the battery cells 16 are provided as measuring cells 20 .
  • These measuring cells 20 are each equipped with a temperature sensor 22 .
  • the temperature sensors 22 are arranged on a respective cell top 30 (see FIG. 2) of the measuring cells 20 .
  • the temperature sensors 22 are attached there by means of a respective welding tag 24 .
  • the temperature sensors 22 are connected to the battery electronics 18 via a flexible printed circuit board 26 or a data or signal line arranged or routed thereon, on it or therein.
  • moisture protection in particular in the form of a coating, can also be arranged or applied on or at the temperature sensor.
  • a temperature signal from the temperature sensor 22 can be routed via the printed circuit board 26 .
  • a corresponding Voltage tap can also be arranged on the cell top 30 to allow a particularly short connection path. The voltage tap and the temperature sensor 22 can therefore be integrated into a corresponding common sensor or line path.

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 (12) qui présente au moins un élément de batterie (16, 20) pourvu d'une paroi latérale (28) et d'une face supérieure d'élément (30) au moins sensiblement perpendiculaire à celle-ci. Un contact électrique d'élément est disposé sur cette face supérieure d'élément. En outre, un capteur de température (22) est fixé de manière thermoconductrice sur cette face supérieure d'élément (30) ou sur une face inférieure d'élément opposée à celle-ci de l'élément de batterie (16, 20) par l'intermédiaire d'un élément de contact (32) thermoconducteur flexible. Le capteur de température (22) est maintenu par une première extrémité (34) d'une languette de soudage (24) qui est disposée sur un côté du capteur de température (22) opposé à l'élément de batterie (16, 20). L'invention concerne en outre un véhicule automobile (10) qui présente une batterie (12) de ce type, en particulier comme batterie de traction (12).
PCT/EP2022/074869 2021-09-28 2022-09-07 Batterie pourvue d'un capteur de température et véhicule automobile WO2023052066A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021125023.4A DE102021125023A1 (de) 2021-09-28 2021-09-28 Batterie mit einem Temperatursensor und Kraftfahrzeug
DE102021125023.4 2021-09-28

Publications (1)

Publication Number Publication Date
WO2023052066A1 true WO2023052066A1 (fr) 2023-04-06

Family

ID=83400594

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/074869 WO2023052066A1 (fr) 2021-09-28 2022-09-07 Batterie pourvue d'un capteur de température et véhicule automobile

Country Status (2)

Country Link
DE (1) DE102021125023A1 (fr)
WO (1) WO2023052066A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317584A1 (fr) * 2009-10-29 2011-05-04 Hitachi Ltd. Source d'alimentation de batterie
WO2020168206A1 (fr) 2019-02-15 2020-08-20 Cps Technology Holdings Llc Capteur pour module de batterie

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101147203B1 (ko) 2010-07-15 2012-05-25 삼성에스디아이 주식회사 이차 전지 팩 및 그 제조 방법
DE102017209413A1 (de) 2017-06-02 2018-12-06 Robert Bosch Gmbh Sensorvorrichtung zum Überwachen zumindest einer Batteriezelle
CN211090150U (zh) 2019-09-05 2020-07-24 东莞新能德科技有限公司 电路板结构及包含该电路板结构的锂离子电池结构

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317584A1 (fr) * 2009-10-29 2011-05-04 Hitachi Ltd. Source d'alimentation de batterie
WO2020168206A1 (fr) 2019-02-15 2020-08-20 Cps Technology Holdings Llc Capteur pour module de batterie

Also Published As

Publication number Publication date
DE102021125023A1 (de) 2023-03-30

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