WO2022117438A2 - Batterie pour un véhicule à moteur et véhicule à moteur équipé d'une batterie - Google Patents

Batterie pour un véhicule à moteur et véhicule à moteur équipé d'une batterie Download PDF

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Publication number
WO2022117438A2
WO2022117438A2 PCT/EP2021/083056 EP2021083056W WO2022117438A2 WO 2022117438 A2 WO2022117438 A2 WO 2022117438A2 EP 2021083056 W EP2021083056 W EP 2021083056W WO 2022117438 A2 WO2022117438 A2 WO 2022117438A2
Authority
WO
WIPO (PCT)
Prior art keywords
battery
busbar
circuit board
degassing opening
battery cell
Prior art date
Application number
PCT/EP2021/083056
Other languages
German (de)
English (en)
Other versions
WO2022117438A3 (fr
Inventor
Zhiwei Fang
Original Assignee
Vitesco Technologies Germany Gmbh
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 Vitesco Technologies Germany Gmbh filed Critical Vitesco Technologies Germany Gmbh
Publication of WO2022117438A2 publication Critical patent/WO2022117438A2/fr
Publication of WO2022117438A3 publication Critical patent/WO2022117438A3/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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]
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • 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 invention relates to a battery for a motor vehicle, the battery having at least one battery cell.
  • the battery cell is surrounded by a battery cell housing.
  • At least one degassing opening is formed in the battery cell housing.
  • a printed circuit board of a battery management system is arranged at a distance from the battery cell housing.
  • a busbar made of an electrically conductive material is arranged between the degassing opening and the printed circuit board of the battery management system.
  • the busbar serves on the one hand to connect the battery cells in an electrically conductive manner and on the other hand to protect the printed circuit board of the battery management system from heating of the printed circuit board by electrolyte gases escaping from the degassing opening.
  • the invention also relates to a motor vehicle with the battery according to the invention.
  • Batteries for motor vehicles are known in principle.
  • the known batteries usually have a plurality of battery cells arranged one behind the other.
  • the battery cells are each arranged in a battery cell housing.
  • a degassing opening is provided in the battery cell housing.
  • a printed circuit board of a battery management system is usually arranged above the battery cells and at a distance from the degassing opening.
  • Electronic components are usually arranged on the printed circuit board.
  • the distance between the vent opening and the The circuit board of the battery management system is dimensioned accordingly. This means that the installation space of the electric battery can be increased.
  • One object of the invention is to specify a battery for an at least partially electrically driven motor vehicle that can have a reduced installation space. This object is solved by the subject matter of patent claim 1. Preferred developments of the invention are the subject matter of the dependent patent claims. Each feature can represent an aspect of the invention both individually and in combination, provided the description does not explicitly state otherwise.
  • a battery for an at least partially electrically powered motor vehicle, having at least one battery cell surrounded by a battery cell housing, the battery cell housing having at least one wall in which a reversibly closable or irreversibly closed degassing opening is formed, and through which at least one electrical contact of the battery cell is guided, a circuit board of a battery management system with at least one electrical and/or electronic component, which is arranged at a distance from the wall having the degassing opening, a busbar, which is electrically conductively connected directly or indirectly to the contact, the busbar is arranged between the wall and the printed circuit board at a distance from the degassing opening and completely projects beyond the degassing opening.
  • a battery is provided for an at least partially electrically powered motor vehicle.
  • the battery is preferably electrically conductively connected to an electric machine arranged in the drive train of the motor vehicle.
  • the battery can thus supply electrical energy to the electrical machine or store electrical energy generated by the electrical machine.
  • the battery has at least one battery cell.
  • the battery cell is surrounded by a battery cell housing.
  • the battery cell is arranged in the battery cell housing.
  • the battery cell housing has at least one wall.
  • a reversibly closable or irreversibly closed degassing opening is formed in the wall.
  • a reversibly closable degassing opening is to be understood as meaning that the degassing opening automatically closes again after it has been opened. This can preferably be done via a membrane designed to be displaceable against a spring force.
  • An irreversibly closed degassing opening is to be understood as meaning that the degassing opening is preferably closed via a membrane which is connected to the wall of the battery cell housing in a materially bonded manner, for example.
  • the membrane is damaged, for example due to excess pressure in the battery cell housing, the membrane is irreparably damaged.
  • a passage for an electrical contact of the battery cell is formed in the wall of the battery cell housing. The electrical contact is thus routed through the wall.
  • the battery cell housing has at least two passages which are different from one another and arranged at a distance from one another, since the battery cell usually has a positive contact and a negative contact.
  • the battery further includes a circuit board of a battery management system. At least one electrical and/or electronic component is generally arranged on the printed circuit board.
  • the printed circuit board usually has a plurality of electrical components.
  • the electrical components are generally set up and/or designed to detect and/or monitor the battery cell voltage.
  • electrical and/or electronic components can be provided, which take over safety-related functions of the battery, for example to control an emergency shutdown of the battery cells, or foaming around the battery cells or the battery cell housing.
  • a busbar is arranged between the printed circuit board and the degassing opening, the busbar being electrically conductively connected directly or indirectly to the contact of the battery cell.
  • An indirect contact can be that another current transmission element is arranged between the busbar and the contact.
  • a contact shoe can be arranged on the conductor rail.
  • a thermal compensation layer is formed between the busbar and the contact element.
  • the busbar is arranged directly, ie without an intermediate element, on the contact element in a materially bonded, form-fitting or force-fitting manner.
  • the busbar is arranged directly or indirectly on the printed circuit board.
  • the printed circuit board is arranged in a printed circuit board frame, and the busbar is preferably connected to the printed circuit board frame via a riveted connection.
  • the printed circuit board is connected directly to the busbar, for example via a rivet or screw connection.
  • an insulating layer is formed between the printed circuit board and the power supply, which can preferably be a component of the printed circuit board or which is preferably applied to the printed circuit board in a materially bonded manner.
  • the conductor rail completely covers or protrudes beyond the degassing opening.
  • the busbar is larger in terms of its areal dimensions than the degassing opening and also covers the degassing opening.
  • the conductor rail is made and/or formed from a metal and/or an alloy. Provision is particularly advantageously made for the conductor rail to be made from aluminum and/or to have an aluminum alloy.
  • a busbar made of aluminum is cheaper than busbars made of copper. Thus, the cost of the battery can be reduced.
  • the conductor rail has an electrically insulating coating in the area that is not electrically conductively contacted with a contact.
  • This coating can preferably be a plastic coating.
  • the conductor rail is designed without a coating and therefore has no electrically and/or thermally insulating coating. In this way, the installation space, the costs and the weight of the busbar and thus also the battery can be reduced.
  • the purely design of the electrically conductive busbar which is connected to at least one contact of the battery cell, completely covers the at least one degassing opening and thus protects the printed circuit board.
  • the busbar is made from a bimetal. In other words, the busbar has at least two different metals. The busbar made from a bi-metal can have increased strength compared to a busbar made from just one metal or one alloy.
  • the contacts can be made of a somewhat less noble material, for example.
  • contact corrosion can also be avoided through the choice of materials.
  • material costs of the contacts can also be reduced by the appropriate choice of materials.
  • the bi-metal has copper and aluminum, or includes a copper alloy and an aluminum alloy. Copper and aluminum are good conductors of electricity, so providing a bus bar that can have a high current carrying capacity.
  • copper and aluminum or a copper alloy and an aluminum alloy can be connected to one another very well, preferably by cold rolling. Cold rolling is usually followed by a heating process to create an increased metallurgical bond between the two metals.
  • the conductor rail has a width b in a cross section, for which 10 mm ⁇ b ⁇ 20 mm applies, and/or has a height for which 0.5 mm ⁇ h ⁇ 3 mm applies .
  • a busbar is provided, the cross section of which has increased rigidity and effectively protects the printed circuit board against direct heating by an electrolyte gas escaping through the degassing opening.
  • a preferred development of the invention is that for a distance a between the conductor rail and the degassing opening, the following applies: 1 mm ⁇ a ⁇ 5 mm.
  • a distance a is provided between the degassing opening and the busbar, which on the one hand allows the electrolyte gas to escape and escape and also specifies a minimum distance to the busbar or to the printed circuit board directly or indirectly arranged on the busbar. In this way, the installation space of the battery can be reduced.
  • the busbar overlaps as little as possible in relation to the degassing opening is greater than 5mm, including the limit.
  • the overlap distance is a smallest distance in a direction parallel to the busbar plane and/or in a direction parallel to the wall plane, between an outer edge of the degassing opening and an outer edge of the busbar.
  • the conductor rail has an L-shaped, T-shaped or arc-shaped cross section.
  • the busbar can have a structure that is bent in the direction of the wall.
  • the short web is preferably directed in the direction of the wall. Escaping gas can thus be explicitly deflected in one direction in order, for example, to protect the printed circuit board adjoining the busbar in a specific area from the escaping electrolyte gases.
  • the long web of the T-shaped busbar is preferably arranged centrally above the degassing opening, so that escaping gas can preferably escape uniformly to the side.
  • the battery has a plurality of battery cells arranged next to one another and/or one behind the other and the conductor rail is arranged in the longitudinal direction of the battery and completely protrudes beyond the degassing openings.
  • a busbar is provided in order to completely protrude over and/or completely cover all degassing openings.
  • effective protection for the circuit board can be provided with just one busbar in order to protect it from the escaping electrolyte gases.
  • the weight and costs of the battery can be reduced by the busbar that is already present to protect the printed circuit board from electrolytic gas.
  • the busbar is designed to be inclined in the longitudinal direction of the battery, relative to an upper side of the battery cells and/or battery cell housing.
  • the battery a longitudinal direction.
  • the battery cells or battery cell housings are arranged next to one another or one behind the other in the longitudinal direction of the battery.
  • the respective degassing openings arranged in the battery cell housing are thus aligned in alignment with one another.
  • the busbar is designed to be inclined.
  • the escaping electrolyte gas can be deflected and/or discharged in one direction, namely in the longitudinal direction of the battery, via the inclination of the busbar. In this way, the risk of heat accumulation as a result of escaping electrolyte gas inside the battery housing can be reduced.
  • the invention also relates to a motor vehicle with the battery according to the invention, the battery being electrically conductively connected to an electric machine arranged in a drive train of the motor vehicle.
  • FIG. 1 is an exploded view of a battery according to a preferred embodiment of the invention.
  • the battery 10 is preferably electrically conductively connected to an electric machine arranged in a drive train of the motor vehicle.
  • the battery 10 can thus make energy available to the electrical machine or store electrical energy that was generated by the electrical machine.
  • the battery 10 has a plurality of battery cells. Each battery cell is arranged in a battery cell housing 12 . In the present case, a plurality of battery cell housings 12 arranged next to one another are therefore provided. Each of the housings 12 has at least one wall 14 . An irreversibly closed degassing opening 16 is formed in the wall 14 .
  • the irreversibly closed degassing opening 16 is preferably a membrane which closes an edge-closed passage opening in the wall 14 of the battery cell housing 12 . If the membrane of the degassing opening 16 is damaged and/or torn, it can no longer be closed. In the wall 14, two spaced-apart openings are also formed, with an electrical contact 18 for electrical contacting of the battery cell being passed through each opening. The degassing opening 16 is formed between the two contacts 18 within the wall 14 .
  • a circuit board 20 of a battery management system is arranged at a distance from wall 14 , at least one electrical and/or electronic component being arranged on circuit board 20 .
  • the electronic component on the printed circuit board can be set up and/or designed to detect and/or monitor a cell voltage of the battery cells.
  • electrical and/or electronic components can be arranged on circuit board 20, which take over the safety function of battery 10, such as an emergency shutdown.
  • a busbar 22 is arranged between the wall 14 and the printed circuit board 20 and is electrically conductively connected directly or indirectly to the contact 18 of the battery cell.
  • the busbar 22 is formed at a distance from the degassing opening 16 and is preferably arranged directly or indirectly on an underside of the circuit board 20 facing the battery 10 .
  • the busbar 22 projects beyond the degassing openings 16 of the battery cell housing 12 completely.
  • an area of the busbar 22 is larger than an area of the degassing opening 16
  • the busbar 22 is arranged parallel and at a distance from the degassing opening, with the busbar 22 completely covering the degassing opening 16 in terms of area.
  • a smallest overhang of the busbar 22 compared to the degassing opening 16 is greater than 5 mm, including the limit.
  • the busbar 22 thus functions as a protective element for the printed circuit board 20 against electrolyte gases escaping through the degassing opening 16 .
  • the risk of escaping from the degassing opening 16 can be reduced
  • Electrolyte gases which generally have a very high temperature and escape through the degassing opening 16 under high pressure, damage the printed circuit board 20 in such a way that the electronic components arranged on the printed circuit board 20 fail.
  • the busbar 22 can be arranged directly or indirectly on the underside of the printed circuit board 20 . Since the already existing
  • Busbar 22 is aligned and/or designed as a baffle plate and/or protective plate for contacting the battery cells, the distance between the wall 14 and the printed circuit board 20 can be reduced, so that the dimensions or the installation space of the battery 10 can be reduced.

Abstract

L'invention concerne une batterie (10) pour un véhicule à moteur à commande au moins en partie électrique 5, qui présente au moins un élément de batterie qui est entouré par un boîtier d'élément de batterie (12), le boîtier d'élément de batterie (12) présentant au moins une paroi (14), dans laquelle est ménagée une ouverture de dégazage (16) pouvant être fermée de manière réversible ou fermée de manière irréversible, et à travers laquelle est guidé au moins un contact (18) électrique de l'élément de batterie, une carte de circuit imprimé (20) d'un système de gestion de batterie dotée d'au moins un composant électronique étant disposée à distance de la paroi (14) comportant l'ouverture de dégazage (16), une barre omnibus (22) qui est reliée de manière électroconductrice indirectement ou directement au contact (18), la barre omnibus (22) étant montée à distance de l'ouverture de dégazage (16) entre la paroi (14) et la carte de circuit imprimé (20) et surplombant entièrement l'ouverture de dégazage (20).
PCT/EP2021/083056 2020-12-04 2021-11-25 Batterie pour un véhicule à moteur et véhicule à moteur équipé d'une batterie WO2022117438A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020215341.8A DE102020215341A1 (de) 2020-12-04 2020-12-04 Batterie für ein Kraftfahrzeug, und Kraftfahrzeug mit einer Batterie
DE102020215341.8 2020-12-04

Publications (2)

Publication Number Publication Date
WO2022117438A2 true WO2022117438A2 (fr) 2022-06-09
WO2022117438A3 WO2022117438A3 (fr) 2022-07-28

Family

ID=78822124

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/083056 WO2022117438A2 (fr) 2020-12-04 2021-11-25 Batterie pour un véhicule à moteur et véhicule à moteur équipé d'une batterie

Country Status (2)

Country Link
DE (1) DE102020215341A1 (fr)
WO (1) WO2022117438A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4333227A1 (fr) 2022-08-29 2024-03-06 Newfrey LLC Ensemble barre omnibus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5340676B2 (ja) 2008-08-29 2013-11-13 三洋電機株式会社 バッテリシステム
US20150125720A1 (en) 2012-08-09 2015-05-07 Sanyo Electric Co., Ltd. Power source device, electric vehicle provided with same, and electricity storage device
US9627663B2 (en) 2013-04-25 2017-04-18 Samsung Sdi Co., Ltd. Rechargeable battery pack including pack cover
JP6198061B2 (ja) * 2013-10-28 2017-09-20 株式会社オートネットワーク技術研究所 配線モジュール
JP6361231B2 (ja) 2014-03-31 2018-07-25 株式会社Ｇｓユアサ 蓄電装置
JP6535309B2 (ja) 2016-09-26 2019-06-26 矢崎総業株式会社 電池監視ユニット
DE102016121265A1 (de) 2016-11-07 2018-05-09 Elringklinger Ag Zellkontaktierungssystem für eine elektrochemische Vorrichtung
WO2018230524A1 (fr) * 2017-06-16 2018-12-20 株式会社Ｇｓユアサ Dispositif de stockage d'énergie
DE102018210151A1 (de) 2018-06-21 2019-12-24 Bayerische Motoren Werke Aktiengesellschaft Fahrzeug mit einem Hochvoltspeicher
PL3644408T3 (pl) * 2018-10-26 2024-01-03 Samsung Sdi Co., Ltd. Moduł baterii

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4333227A1 (fr) 2022-08-29 2024-03-06 Newfrey LLC Ensemble barre omnibus
WO2024047000A1 (fr) 2022-08-29 2024-03-07 Newfrey Llc Ensemble barre omnibus

Also Published As

Publication number Publication date
DE102020215341A1 (de) 2022-06-09
WO2022117438A3 (fr) 2022-07-28

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