EP3707773A1 - Élément de batterie à refroidissement amélioré - Google Patents

Élément de batterie à refroidissement amélioré

Info

Publication number
EP3707773A1
EP3707773A1 EP18807878.6A EP18807878A EP3707773A1 EP 3707773 A1 EP3707773 A1 EP 3707773A1 EP 18807878 A EP18807878 A EP 18807878A EP 3707773 A1 EP3707773 A1 EP 3707773A1
Authority
EP
European Patent Office
Prior art keywords
current collector
cooling
housing
battery cell
coolant
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.)
Withdrawn
Application number
EP18807878.6A
Other languages
German (de)
English (en)
Inventor
Thomas Klemen
Markus Feigl
Nikolaus Hautmann
Rene Deponte
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3707773A1 publication Critical patent/EP3707773A1/fr
Withdrawn legal-status Critical Current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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a battery cell.
  • the present invention relates to a battery cell with improved cooling.
  • prismatic hardcase battery cells are widely used in today's electrified motor vehicles.
  • prismatic hardcase battery cells are widely used in today's electrified motor vehicles.
  • the prismatic hardcase battery cells are widely used in today's electrified motor vehicles.
  • This battery format is used for series produced batteries for hybrid vehicles.
  • An efficient cooling is an advantage.
  • US 2012/0177973 describes a battery cell which has two current collectors for electrical contacting. It is provided that at least one of the current collector, in particular by cooling channels, is provided to guide a cooling medium through the current collector.
  • DE 10 2013 200 212 A1 describes a battery cell for a battery module for supplying an electric drive of an electric or hybrid vehicle.
  • the battery cell includes a housing that has current collectors that function as
  • JP 2006210185 describes a battery with a cooling structure.
  • the cooling structure is arranged on a winding element.
  • the present invention is a battery cell, comprising a cell housing, which accommodates an electrode assembly having a cathode and an anode, wherein in the cell housing, a first current collector for electrically contacting the cathode is provided and wherein in the
  • Cell housing a second current collector is provided for electrically contacting the anode, and wherein within the cell housing, an insulating housing is provided, which isolates at least one of the first current collector and the second current collector of the cell housing, wherein at least one of the first current collector, the second current collector and the insulating housing is designed with a tempering structure.
  • the above-described battery cell includes a cell case which houses an electrode assembly having a cathode and an anode.
  • Cell housing may, for example, be at least partially made of a metal, such as aluminum, to have sufficient stability and, optionally, to be at least partially electrically conductive, such that the housing may be electronically connected to one of the electrodes, such as the cathode can be.
  • the electrode arrangement can in principle be designed as is suitable for the corresponding battery cell and in principle in such a way as is known from the prior art, for example for prismatic battery cells. Accordingly, the electrode arrangement may in particular be designed with an anode, a cathode and a separator arranged between the anode and the cathode.
  • the electrode arrangement can form a lithium-ion cell and be designed accordingly.
  • the battery cell may have a wound configuration, wherein the current collectors may each be welded to the wound structure as described below.
  • a first current collector is provided for electrically contacting the cathode and that in the
  • Cell housing provided a second current collector for electrically contacting the anode.
  • the current collectors thus serve to the anode
  • the current collector of the anode may be made of aluminum, whereas the current collector of the cathode may be made of copper.
  • an insulating housing is further provided within the cell housing, which is at least one of the first
  • the insulating housing serves to mechanically fix the first and the second current collector and to prevent electrical contact between the current collector or the current collectors and the housing, for example when a force is applied from the outside.
  • At least one of the first current collector, the second current collector and the insulating housing is configured with a tempering structure.
  • a tempering structure For example, only the first current collector, only the second current collector, only the insulating housing or any combination, so for example both current collectors and optionally the insulating housing or only one of the current collectors, that of the anode or the cathode, and the insulating housing, with a temperature control be provided.
  • this embodiment according to which at least one of the first current collector, the second current collector and the insulating housing is configured with a tempering, can provide significant advantages over the prior art.
  • the battery cell can be brought to the operating temperature particularly quickly, which can allow a gentle operation of the battery cell.
  • cooling it may thus also be possible to dispense with cooling plates. These are provided in the prior art, especially at the module level and act from the exterior of the cell housing to the electrode assembly. By dispensing with such cooling plates in turn can be saved weight and costs can be reduced. In addition, a reduction in height can be made possible, which can enable use even in space-poor applications. Moreover, the foregoing shows that the battery cell described herein may be particularly advantageous in mobile arrangements, such as in vehicles.
  • Insulating housing also adjacent to this, a thermal barrier can be created, which can allow protection of adjacent battery cells.
  • a significant gain in security can be achieved.
  • the tempering structure has at least one cooling channel for guiding a coolant.
  • a particularly effective tempering ie cooling or heating
  • coolant or cooling fluid in particular cooling fluid
  • cooling medium is not electrically conductive.
  • refrigerants include, for example, any silicone oils, such as those known for example from transformers.
  • a plurality of cooling channels is also included in the invention, even if the following is only spoken of a cooling channel. The described embodiments thus apply to a cooling channel and likewise to a plurality of at least two cooling channels.
  • the cooling channel may for example be divided more or split, so that at a coolant inlet and a coolant outlet, a coolant structure with a plurality of
  • Coolant channels can be provided, which is a particularly effective
  • a coolant connection is provided for guiding coolant into the cooling channel or out of the cooling channel adjacent to an electrical connection of the electrode arrangement, that is to say in particular on the same side, for example on the top side.
  • the periphery of the battery cell is provided approximately including all the electrical connections on one side of the battery cell, that is approximately at the top. This embodiment can thus allow an improved assembly, since the periphery is spatially concentrated and thus the other pages have no restrictions of the installation space or the mounting conditions.
  • a coolant connection for guiding coolant into the cooling channel or out of the cooling channel is arranged adjacent to an insulator of an electrical connection, ie the coolant extends through the insulator and a cooling channel terminates approximately at the insulator.
  • the insulator may, for example, be arranged inside the cell housing and protect the electrical, in particular external, connection from contact with the cell housing.
  • the insulator may have approximately two holes, wherein the coolant can pass through a bore in the cooling channel and through the second bore, the coolant from the cooling channel emerge again, the coolant can flow through the entire current collector or through the entire insulating, so as to realize a tempering, ie a heating or cooling.
  • a coolant connection for guiding coolant into the cooling channel or out of the cooling channel is provided on a side which is different from an electrical connection of the electrode arrangement and, for example, facing away from it.
  • the connections for the cooling circuit or the cooling line may be provided on the cell bottom, if the electrical connections are arranged on the head side. In the bottom of the cell case could then be two holes and in the
  • a seal may be present approximately in the insulating, so that it can be dispensed with further sealing elements, such as O-rings.
  • Ports are separated from the coolant connections, which is the Safety of operation can improve.
  • a side of the electrical connections such as at the head of the battery cell, a
  • the insulator may for example be a plastic injection molded part, wherein the
  • the coolant O-rings can be provided in recordings of the insulator.
  • other gaskets such as flat gaskets or elastomer gaskets sprayed onto the insulator, are also suitable.
  • the insulating housing at least partially positively receives at least one of the first current collector and the second current collector.
  • a good thermal contact can be made possible from the current collector to the insulating housing, which can make the above-described safety effect particularly effective.
  • it can effectively be prevented that the respective current collector abuts against the cell housing, for example, in the event of vibrations, and thus a short circuit can occur.
  • the first current collector having a cooling structure or the second current collector having a cooling structure or the insulating housing having a cooling structure is produced by an additive method.
  • current collectors and / or insulating housings can be formed, in which a cooling structure, such as one or more cooling channels, are configured such that a particularly effective temperature control can take place.
  • the cooling channels completely through the or
  • the current collectors are made without support structures, which can prevent a relatively costly reworking.
  • the current collectors may be advantageous in the case of the current collectors, for example, that additive build-up methods with aluminum and copper, which are particularly suitable as potential materials for the current collectors, are possible without problems.
  • any additive methods which are also referred to as 3D printing, for example, are suitable.
  • the additive method comprises selective laser sintering.
  • Raw material bed is provided and by successive localized and layered white melting and hardening of the raw material and refilling of raw material, a component can be built additive layer by layer.
  • the present invention further provides a battery module comprising a plurality of battery cells, as described in detail above, the battery module being free of a cooling unit acting on the battery cells from outside the cell housing.
  • the present invention also relates to the use of an additive method for producing a current ko hectare or a
  • Insulating housing for a battery cell wherein the current collector or the
  • Insulating housing at least one cooling structure, in particular a cooling channel, for guiding a coolant.
  • Cooling structures such as cooling ducts are introduced, which undergo about vein-like the current collector or the insulating housing. As a result, an effective temperature control and accordingly a high level of safety can be ensured.
  • Fig. 1 is a schematic view of a battery cell
  • Fig. 2 is a schematic view of the battery cell of Figure 1 without a
  • FIG. 3 shows a schematic sectional view showing an electrical connection of a current collector
  • Fig. 4 a stream ko hectares
  • Fig. 5 is a further schematic sectional view showing an electrical
  • Fig. 6 is a further schematic sectional view showing an electrical
  • Fig. 7 is a schematic view of an insulator
  • Fig. 8 is a schematic view showing a connection of a
  • Fig. 9 is a schematic view showing an insulating housing
  • FIG. 10 shows a further schematic view showing the insulating housing from FIG. Fig. 11 is a further schematic view showing the insulating housing of Fig. 9;
  • Fig. 12 is a schematic view of an insulating case in a battery cell
  • Fig. 13 is a further schematic view of an insulating housing in one
  • Fig. 14 is a further schematic view of an insulating housing in one
  • Fig. 15 an insulating housing in which the cooling channels are indicated;
  • Fig. 16 is a fixation of the insulating housing to a cell housing in one
  • Fig. 18 is a schematic sectional view through a further embodiment of a battery cell from the side.
  • FIG. 1 shows a schematic view of a battery cell 10.
  • the battery cell 10 comprises a cell housing 12, which accommodates an electrode arrangement 14 with a cathode and an anode and which can be closed by a cover 36. This is shown in FIG. In the figures it can be seen that in the cell housing 12, a first current collector 16 is provided for electrically contacting the cathode of the electrode assembly 14 and that in the cell housing 12, a second current collector 18 for
  • an insulating housing 20 is provided within the cell housing 12, which insulates at least one of the first current collector 16 and the second current collector 18 from the cell housing 12. Furthermore, the electrical connections of the electrode arrangement 14 are shown, which are described in more detail in FIG.
  • FIG 3 an electrical connection of the second current ko hectare 18 is shown. It is shown that the current collector 18 is connected to a connecting bolt 22, wherein the connecting bolt 22 carries a top plate 24 and a spacer insulator 26. The spacer insulator 26 is disposed between the top plate 24 and an insulator 28. For a seal, a sealing ring 30 is also provided.
  • the current collector 18 has a cooling channel 32 as tempering 34.
  • the current collector 18 may be constructed by an additive method, as described in detail below. In this case, the current collector can be constructed as shown in Figure 4 from bottom to top.
  • FIGS 5 and 6 in turn show the connection of the current collector 16 to feed the cooling channel 32 with coolant. Shown is from the
  • receptacles 42, 44 for O-rings 46, 48 Adjacent to the bores 38, 40 are receptacles 42, 44 for O-rings 46, 48 are provided.
  • the insulator 28 is shown in detail in FIG.
  • Figure 8 also shows a preferred embodiment, according to which the insulating housing 20 receives the current collector 16 at least partially positive fit.
  • Figures 9 and 10 also show an insulating housing 20, which may also be made additive with cooling channels 32 and which two legs 50, 52 for receiving and / or insulating the current collectors 16, 18 has.
  • FIG. 11 also shows the insulating housing 20, wherein it is shown in particular that the insulating housing has connections 54, 56 for the cooling channels 32.
  • FIGS. 12, 13 and 14 show the insulating housing 20 in a battery cell 10.
  • FIG. 15 shows the cooling channels 32 of the insulating housing 20.
  • FIGS. 16 and 17 show that the insulating housing 20 is fastened by means of a clamp 58, which sits on the exterior of the cell housing 12 or at the bottom thereof.
  • Electrode assembly 14 is welded.

Landscapes

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

Abstract

La présente invention concerne un élément de batterie (10) présentant un boîtier d'élément (12) qui loge un ensemble d'électrodes (14) comportant une cathode et une anode, un premier collecteur de courant (16) destiné à la mise en contact électrique de la cathode étant prévu dans le boîtier d'élément (12) et un second collecteur de courant (18) destiné à la mise en contact électrique de l'anode étant prévu dans le boîtier d'élément, et un boîtier isolant (20), situé à l'intérieur du boîtier d'élément (12), isolant du boîtier d'élément (12) au moins un collecteur de courant, parmi le premier collecteur de courant (16) et le second collecteur de courant (18), et au moins un élément structural, parmi le premier collecteur de courant (16), le second collecteur de courant (18) et le boîtier isolant (20), étant muni d'une structure d'équilibrage de la température (34).
EP18807878.6A 2017-11-08 2018-11-07 Élément de batterie à refroidissement amélioré Withdrawn EP3707773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017219798.6A DE102017219798A1 (de) 2017-11-08 2017-11-08 Batteriezelle mit einer verbesserten Kühlung
PCT/EP2018/080455 WO2019092007A1 (fr) 2017-11-08 2018-11-07 Élément de batterie à refroidissement amélioré

Publications (1)

Publication Number Publication Date
EP3707773A1 true EP3707773A1 (fr) 2020-09-16

Family

ID=64456927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18807878.6A Withdrawn EP3707773A1 (fr) 2017-11-08 2018-11-07 Élément de batterie à refroidissement amélioré

Country Status (3)

Country Link
EP (1) EP3707773A1 (fr)
DE (1) DE102017219798A1 (fr)
WO (1) WO2019092007A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019007130A1 (de) 2019-10-14 2021-04-15 Daimler Ag Batteriezelle, Batterieanordnung und Verfahren zum Entwärmen einer Batteriezelle
DE102022128447A1 (de) 2022-10-27 2024-05-02 Bayerische Motoren Werke Aktiengesellschaft Hohlzylindrische Wärmeübertragungsvorrichtung zum Kühlen einer Zelle eines elektrochemischen Energiespeichers und Anordnung zum Kühlen einer Zelle eines elektrochemischen Energiespeichers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4661020B2 (ja) * 2002-10-16 2011-03-30 日産自動車株式会社 バイポーラリチウムイオン二次電池
JP2006210185A (ja) 2005-01-28 2006-08-10 Toyota Motor Corp ２次電池の冷却構造および組電池の冷却構造
DE102009034675A1 (de) 2009-07-24 2011-01-27 Li-Tec Battery Gmbh Elektrochemischer Energiespeicher und Verfahren zum Kühlen oder Erwärmen eines elektrochemischen Energiespeichers
CZ2010703A3 (cs) * 2010-09-23 2012-04-04 He3Da S.R.O. Lithiový akumulátor
DE102013200212A1 (de) 2013-01-10 2014-07-10 Robert Bosch Gmbh Stromkollektoren für Batteriezellen
US9466823B2 (en) * 2013-02-28 2016-10-11 Samsung Sdi Co., Ltd. Rechargeable battery
KR101601142B1 (ko) 2013-10-18 2016-03-08 주식회사 엘지화학 단열재를 포함하여 2이상의 분리된 유로를 가진 히트싱크

Also Published As

Publication number Publication date
WO2019092007A1 (fr) 2019-05-16
DE102017219798A1 (de) 2019-05-09

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