WO2008104356A1 - Battery housing - Google Patents

Battery housing Download PDF

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Publication number
WO2008104356A1
WO2008104356A1 PCT/EP2008/001493 EP2008001493W WO2008104356A1 WO 2008104356 A1 WO2008104356 A1 WO 2008104356A1 EP 2008001493 W EP2008001493 W EP 2008001493W WO 2008104356 A1 WO2008104356 A1 WO 2008104356A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
housing
potting compound
insulating layer
cell
Prior art date
Application number
PCT/EP2008/001493
Other languages
German (de)
French (fr)
Inventor
Jens Meintschel
Dirk Schröter
Matthias Gregor
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2008104356A1 publication Critical patent/WO2008104356A1/en

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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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/231—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks having a layered structure
    • 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
    • H01M50/24—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 from their environment, e.g. from corrosion
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • 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

  • a potting compound wherein the potting compound of the cell composite reaches to the inside of the side wall.
  • This is preferably provided internally with a heat-insulating layer, which also serves as a casting mold for the potting compound.
  • Possible materials for the insulating layer are solid foams (rigid foams or flexible foams) of all kinds, such as polyurethane foams. These are foamed before installation of the cell composite, for example, by a negative mold.
  • the proposed construction fixes the tent composite without play in the housing. Tolerances of cell composite and housing
  • Fig. 1 shows a vertical section through a part of a battery 1 according to the prior art.
  • a part of the battery case with the side wall 2 and a part of the bottom 3 with cells 4 inserted therein, for example, lithium-ion battery cells.
  • FIG. 2 shows a vertical partial section corresponding to FIG. 1 through a battery 1 according to the invention.
  • the cell assembly is secured with a potting compound 8 in the housing, wherein the potting compound 8 extends from the cell assembly to the inside of the side wall 2.
  • the housing has on its inside an insulating layer 11, to which the potting compound 8 extends.
  • the insulating layer 11 is arranged on the inside of the bottom 3 and on the inside of the side wall 2, for example by a coating, and is considered as part of the side wall 2.
  • the insulating layer 11 is electrically and / or thermally insulating and consists for example of a solid foam (hard or soft foam), in particular a polyurethane foam.
  • the cell assembly is inserted into the housing and after insertion into the housing cast the housing by casting with the potting compound 8.
  • the insulating layer 11 attached to the inside of the housing simultaneously serves as a casting mold for the highly thermally conductive and electrically insulating potting compound 8. After potting, the potting compound 8 is sufficient from the cell assembly to the insulation layer 11 mounted on the inside of the housing.

Abstract

The invention relates to a battery (1), comprising a housing with a base (3) and a sidewall (2) and a cell assembly of cells (4), arranged in the housing, in particular, a vehicle battery. According to the invention, the cell assembly may be fixed in the housing, wherein the cell assembly is fixed in the housing by means of a cast mass (8), the cast mass (8) reaching from the cell assembly to the inner side of the sidewall (2).

Description

Batteriegehäuse battery case
Die Erfindung betrifft die Befestigung und den Einbau des Zellblocks bzw. Zellverbundes in dem Batteriegehäuse einer Batterie, insbesondere einer Fahrzeugbatterie, insbesondere einer Batterie für ein Fahrzeug mit Hybridantrieb oder ein Brennstoffzellen-Fahrzeug.The invention relates to the attachment and installation of the cell block or cell assembly in the battery housing of a battery, in particular a vehicle battery, in particular a battery for a vehicle with hybrid drive or a fuel cell vehicle.
Nach dem Stand der Technik muss die bei Ladung und Entladung in den Zellen von Lithium-Ionen-Batterien (z.B. für Hybridantriebe oder Brennstoffzellen-Fahrzeuge) entstehende Wärme durch eine Kühlung abgeführt werden. Wegen der maximal zulässigen Zelltemperatur von ca. 50 0C wird die Kühlung über den Klimakreislauf des Fahrzeugs vorgenommen. Die wärmetechnische Anbindung der Zellen an die Kühlstäbe erfolgt durch Vergussmasse.According to the state of the art, the heat arising during charging and discharging in the cells of lithium-ion batteries (eg for hybrid drives or fuel cell vehicles) has to be dissipated by cooling. Because of the maximum cell temperature of about 50 0 C, the cooling by the air conditioning circuit of the vehicle is made. The thermal connection of the cells to the cooling rods is done by potting compound.
Nach dem Stand der Technik sind Batterien bekannt, bei denen die von Aluminium umhüllte Zelle durch eine von Kältemittel durchströmte Kühlplatte gekühlt wird. In Längsrichtung der Zelle wird die Wärme durch die Zellwand und/oder durch separate Kühlstäbe geleitet. Auf die Kühlplatte ist außerdem ein mantelartiges Blech aufgesetzt, das die Zellen seitlich umschließt. Es dient zur Wärmeableitung und als Form für die Vergussmasse, mit der die Räume zwischen Zellen und Kühlstäben ausgegossen werden. Nach dem Verguss entsteht der so genannte Zellblock oder Zellverbund, eine massive Konstruktion, die bislang mittels Verschraubung oder durch Einguss mit Kunststoff im Batteriegehäuse befestigt wird. Nach dem Einbau des Innenlebens der Batterie wird der Gehäusedeckel durch Verschraubung, Vernietung, Verklebung oder Verschweißung befestigt. Das Vergießen der Zellen erfolgt nach dem Stand der Technik zweckmäßigerweise ohne Verwendung einer separaten Gießform. Hierzu ist um den Zellverbund ein Hüllblech angeordnet, das gleichzeitig die Vergiessform bildet. Dieses Hüllblech ist aufwändig herzustellen und kostet Bauraum, da es mit in den Zellverbund eingegossen wird.Batteries are known in the prior art in which the aluminum-clad cell is cooled by a cooling plate through which refrigerant flows. In the longitudinal direction of the cell, the heat is passed through the cell wall and / or through separate cooling rods. On the cooling plate also a coat-like sheet is placed, which encloses the cells laterally. It is used for heat dissipation and as a mold for the potting compound, with which the spaces between cells and cooling bars are poured out. After encapsulation, the so-called cell block or cell compound is created, a massive structure that has hitherto been fastened in the battery housing by screwing or by pouring plastic. After installing the inside of the battery, the housing cover is fixed by screwing, riveting, gluing or welding. The potting of the cells is carried out according to the prior art expediently without the use of a separate casting mold. For this purpose, a cladding sheet is arranged around the cell composite, which simultaneously forms the Vergiessform. This cover sheet is complex to produce and costs space, since it is poured into the cell composite.
Nachteilig bei den bekannten Batterien ist somit der aufgrund der Fertigungstoleranzen nicht spielfreie und dennoch aufwendige Einbau des Zellverbundes in das Batteriegehäuse.A disadvantage of the known batteries is thus due to the manufacturing tolerances not backlash and yet consuming installation of the cell assembly in the battery case.
Der Erfindung liegt die Aufgabe zugrunde, den Zellverbund spielfrei und belastbar in ein Batteriegehäuse einzubauen.The invention has for its object to install the cell assembly backlash and resilient in a battery case.
Die Aufgabe wird erfindungsgemäß durch eine Batterie mit den Merkmalen des Anspruchs 1 gelöst . Bevorzugte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und der nachfolgenden Beschreibung mit zugehörigen Zeichnungen.The object is achieved by a battery having the features of claim 1. Preferred embodiments and further developments of the invention will become apparent from the dependent claims and the following description with accompanying drawings.
Eine erfindungsgemäße Batterie mit einem Gehäuse, das einen Boden und eine Seitenwand umfasst, und mit einem in dem Gehäuse angeordneten Zellverbund von Zellen, weist also die Besonderheit auf, dass der Zellverbund mit einer Vergussmasse in dem Gehäuse befestigt ist, wobei die Vergussmasse von dem Zellverbund bis zur Innenseite der Seitenwand reicht. Erfindungsgemäß wird vorgeschlagen, das Hüllblech um den Zeltverbund entfallen zu lassen und den Verguss nach Einbau des Zellverbundes in das Batteriegehäuse vorzunehmen. Dieses ist innen vorzugsweise mit einer wärmeisolierenden Schicht versehen, die gleichzeitig als Gießform für die Vergussmasse dient. Mögliche Werkstoffe für die Isolationsschicht sind feste Schäume (Hartschäume oder Weichschäume) aller Art, wie zum Beispiel Polyurethan-Schäume . Diese werden vor dem Einbau des Zellverbundes z.B. durch eine Negativform eingeschäumt. Die vorgeschlagene Konstruktion fixiert den Zeltverbund spielfrei im Gehäuse. Toleranzen von Zellverbund und Gehäuse werden durch die Vergussmasse ausgeglichen.A battery according to the invention with a housing, which comprises a bottom and a side wall, and with a cell assembly of cells arranged in the housing, thus has the peculiarity that the cell assembly is secured in the housing with a potting compound, wherein the potting compound of the cell composite reaches to the inside of the side wall. According to the invention, it is proposed to omit the cladding sheet around the tent composite and to carry out the encapsulation after installation of the cell assembly in the battery case. This is preferably provided internally with a heat-insulating layer, which also serves as a casting mold for the potting compound. Possible materials for the insulating layer are solid foams (rigid foams or flexible foams) of all kinds, such as polyurethane foams. These are foamed before installation of the cell composite, for example, by a negative mold. The proposed construction fixes the tent composite without play in the housing. Tolerances of cell composite and housing are compensated by the potting compound.
Durch die Erfindung werden folgende Vorteile erzielt:The invention provides the following advantages:
- Eine kostengünstige Herstellung.- An inexpensive production.
- Eine Reduzierung des benötigten Bauraums der Batterie.- A reduction of the required installation space of the battery.
- Eine belastbare Fixierung des Zellverbundes im Batteriegehäuse .- A reliable fixation of the cell assembly in the battery case.
Die Erfindung wird nachfolgend anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Die darin beschriebenen Besonderheiten können einzeln oder in Kombination miteinander eingesetzt werden, um bevorzugte Ausgestaltungen der Erfindung zu schaffen.The invention will be explained in more detail with reference to an embodiment shown in FIGS. The features described therein may be used alone or in combination with each other to provide preferred embodiments of the invention.
Dabei zeigen:Showing:
Fig. 1 einen vertikalen Querschnitt durch eine Batterie nach dem Stand der Technik. Fig. 2 einen vertikalen Querschnitt durch eine erfindungsgemäße Batterie. Fig. 3 eine perspektivische Ansicht eines erfindungsgemäßen Batteriegehäuses mit Kühlstäben undFig. 1 is a vertical cross-section through a battery according to the prior art. Fig. 2 is a vertical cross-section through a battery according to the invention. Fig. 3 is a perspective view of a battery housing according to the invention with cooling bars and
Isolationsschicht, aber noch ohne eingesetzte Zellen. Fig. 4 die Batterie von Figur 3 mit eingesetzten Zellen, aber noch ohne Vergussmasse.Insulation layer, but still without cells inserted. Fig. 4 shows the battery of Figure 3 with inserted cells, but still without casting compound.
Fig. 5 die Batterie von Figur 4 mit Vergussmasse. Fig. 6 eine Aufsicht zu Figur 4, mit einem abgewandeltenFig. 5 shows the battery of Figure 4 with potting compound. Fig. 6 is a plan view of Figure 4, with a modified
Gehäuse mit Elektronikkammer.Housing with electronics chamber.
Die Fig. 1 zeigt einen vertikalen Schnitt durch einen Teil einer Batterie 1 nach dem Stand der Technik. Zu erkennen ist ein Teil des Batteriegehäuses mit der Seitenwand 2 und einem Teil des Bodens 3 mit darin eingesetzten Zellen 4, beispielsweise Lithium-Ionen-Batteriezellen.Fig. 1 shows a vertical section through a part of a battery 1 according to the prior art. Evident is a part of the battery case with the side wall 2 and a part of the bottom 3 with cells 4 inserted therein, for example, lithium-ion battery cells.
Bei einer in Fig. 1 dargestellten bekannten Batterie 1 wird die von dünnem Aluminium umhüllte Zelle 4 vom Boden aus durch eine von Kältemittel durchströmte Verdampferplatte 5 gekühlt. Um die Wärme von der Zelle 4 zur Verdampferplatte 5 zu bringen, befinden sich zwischen den Zellen 4 Wärmeleitstäbe 6 aus Aluminium, die in der Verdampferplatte 5 verankert sind. Der ganze Zellblock ist mit einem Hüllblech 7 umgeben und wird mit wärmeleitfähiger Vergussmasse 8 ausgegossen. Die Vergussmasse 8 übernimmt gleichzeitig die elektrische Isolation und fixiert die Zellen 4 im Zellverbund. Die Verdampferplatte 5 mit ihren Kühlstäben 6 und dem Hüllblech 7 ist sehr teuer. Zum Durchleiten einer Kühlflüssigkeit durch die Kühlschlange der Verdampferplatte 5 weist die Batterie 1 einen nicht dargestellten Kühlflüssigkeitsanschluss auf.In a known battery 1 shown in FIG. 1, the thin aluminum-clad cell 4 is cooled from the bottom by an evaporator plate 5 through which refrigerant flows. In order to bring the heat from the cell 4 to the evaporator plate 5, are located between the cells 4 4 thermal conductivity of aluminum, which are anchored in the evaporator plate 5. The whole cell block is surrounded by a Hüllblech 7 and is poured with thermally conductive potting compound 8. The casting compound 8 simultaneously takes over the electrical insulation and fixes the cells 4 in the cell assembly. The evaporator plate 5 with its cooling bars 6 and the Hüllblech 7 is very expensive. For passing a cooling liquid through the cooling coil of the evaporator plate 5, the battery 1 has a cooling liquid connection, not shown.
Die Seitenwand 2 und der Boden 3 sind auf der Innenseite, d.h. der Seite, die den Zellen 4 zugewandt ist, mit einem Isolationsmaterial 9 versehen, beispielsweise einer Schaummatte. Die zwischen den Zellen 4 vorhandenen Spalte sind mit Vergussmasse 8 ausgefüllt. Das Hüllblech 7 dient gleichzeitig als Gießform beim Einfüllen der Vergussmasse 8. Der beim Vergießen mit Vergussmasse 8 gebildete Zellverbund wird nach dem Verguss in das Batteriegehäuse eingebaut. Dabei wird die Verdampferplatte 5 auf dem Isolationsmaterial 9 des Bodens 3 aufgesetzt und zwischen dem Zellverbund und der Seitenwand 2 verbleibt ein Luftspalt 10, genauer gesagt zwischen dem Hüllblech 7 und dem Isolationsmaterial 9 der Seitenwand 2.The side wall 2 and the bottom 3 are on the inside, ie the side which faces the cells 4, provided with an insulating material 9, for example a foam mat. The existing between the cells 4 column are filled with potting compound 8. The enveloping plate 7 also serves as a casting mold when filling the potting compound 8. The compound formed during potting with potting compound 8 is installed in the battery case after potting. In this case, the evaporator plate 5 is placed on the insulating material 9 of the bottom 3 and between the cell assembly and the side wall 2 remains an air gap 10, more precisely between the Hüllblech 7 and the insulating material 9 of the side wall second
In Fig. 2 ist ein der Figur 1 entsprechender vertikaler Teilschnitt durch eine erfindungsgemäße Batterie 1 dargestellt. Dabei ist der Zellverbund mit einer Vergussmasse 8 in dem Gehäuse befestigt, wobei die Vergussmasse 8 von dem Zellverbund bis zur Innenseite der Seitenwand 2 reicht. Das Gehäuse weist auf seiner Innenseite eine Isolationsschicht 11 auf, bis zu der die Vergussmasse 8 reicht. Die Isolationsschicht 11 ist auf der Innenseite des Bodens 3 und auf der Innenseite der Seitenwand 2 angeordnet, beispielsweise durch eine Beschichtung, und wird als Bestandteil der Seitenwand 2 betrachtet. Die Isolationsschicht 11 ist elektrisch und/oder thermisch isolierend und besteht beispielsweise aus einem festen Schaum (Hart- oder Weichschaum) , insbesondere einem Polyurethan- Schaum.FIG. 2 shows a vertical partial section corresponding to FIG. 1 through a battery 1 according to the invention. In this case, the cell assembly is secured with a potting compound 8 in the housing, wherein the potting compound 8 extends from the cell assembly to the inside of the side wall 2. The housing has on its inside an insulating layer 11, to which the potting compound 8 extends. The insulating layer 11 is arranged on the inside of the bottom 3 and on the inside of the side wall 2, for example by a coating, and is considered as part of the side wall 2. The insulating layer 11 is electrically and / or thermally insulating and consists for example of a solid foam (hard or soft foam), in particular a polyurethane foam.
Zwischen dem Zellverbund und der Seitenwand 2 des Gehäuses befindet sich im Unterschied zu Fig. 1 kein Luftspalt 10 und keine eine Gießform bildende metallene Zwischenschicht, also kein Hüllblech 7. Zur Montage der Batterie 1 wird der Zellverbund in das Gehäuse eingesetzt und nach dem Einsetzen in das Gehäuse durch Vergießen mit der Vergussmasse 8 vergossen. Dabei dient die auf der Innenseite des Gehäuses angebrachte Isolationsschicht 11 gleichzeitig als Gießform für die gut wärmeleitfähige und elektrisch isolierende Vergussmasse 8. Nach dem Vergießen reicht die Vergussmasse 8 von dem Zellverbund bis zu der auf der Innenseite des Gehäuses angebrachten Isolationsschicht 11.In contrast to FIG. 1, there is no air gap 10 and no metal intermediate layer forming a casting mold, ie no cladding sheet 7. For mounting the battery 1, the cell assembly is inserted into the housing and after insertion into the housing cast the housing by casting with the potting compound 8. At the same time, the insulating layer 11 attached to the inside of the housing simultaneously serves as a casting mold for the highly thermally conductive and electrically insulating potting compound 8. After potting, the potting compound 8 is sufficient from the cell assembly to the insulation layer 11 mounted on the inside of the housing.
Die Fig. 3 zeigt eine perspektivische Ansicht eines erfindungsgemäßen Batteriegehäuses mit Kühlstäben bzw. Wärmeleitstäben 6 und innen an der Seitenwand 2 angebrachter Isolationsschicht 11, aber noch ohne eingesetzte Zellen 4. Mögliche Werkstoffe für die Isolationsschicht 11 sind beispielsweise feste Schäume (Hart- oder Weichschäume) aller Art, wie z.B. Polyurethan-Schäume . Diese werden vor dem Einbau des Zellverbundes eingeschäumt, beispielsweise durch Verwendung einer Negativform. Alternativ ist es auch möglich, das Batteriegehäuse, d.h. die Seitenwand 2 und/oder den Boden 3, mit einem massiven Material auszubilden, das gleichzeitig die Isolationsfunktion übernimmt. Das Gehäuse bzw. die aufgebrachte Isolationsschicht 11 dient als Gießform für die Vergussmasse .FIG. 3 shows a perspective view of a battery housing according to the invention with cooling bars or heat conducting bars 6 and insulating layer 11 mounted inside on the side wall 2, but still without cells 4. Possible materials for the insulating layer 11 are, for example, solid foams (hard or soft foams). of all kinds, such as Polyurethane foams. These are foamed before installation of the cell composite, for example by using a negative mold. Alternatively, it is also possible to use the battery case, i. the side wall 2 and / or the bottom 3 to form with a solid material, which simultaneously performs the insulation function. The housing or the applied insulating layer 11 serves as a casting mold for the potting compound.
Die Fig. 4 zeigt die Batterie von Fig. 3 mit eingesetzten Zellen 4 vor dem Vergießen mit Vergussmasse. In Fig. 5 ist die Vergussmasse 8 eingefüllt, wodurch der Zwischenraum zwischen den Zellen 4 und den Wärmeleitstäben 6 sowie der Raum bis zum dem Isolationsmaterial 9 ausgefüllt wird. Hierdurch wird der Zellverbund spielfrei in dem Gehäuse fixiert und Toleranzen von Zellverbund und Gehäuse werden durch die Vergussmasse 8 ausgeglichen. Als Vergussmasse 8 haben sich insbesondere elektrisch isolierende, jedoch - wenn auch nur in geringem Umfang - wärmeleitende Werkstoffe wie bevorzugt Polyurethan-Vergussmasse, Epoxidharze und/oder Silikone bewährt. Mit diesen bevorzugten Werkstoffen werden die betreffenden Freiräume möglichst blasenarm und besonders bevorzugt blasenfrei ausgegossen. In günstiger Weise können die Werkstoffe für die Vergussmasse 8 durch Zugabe wärmeleitender Partikel hinsichtlich ihrer Wärmeleitung noch verbessert werden.FIG. 4 shows the battery of FIG. 3 with inserted cells 4 before casting with potting compound. In Fig. 5, the potting compound 8 is filled, whereby the gap between the cells 4 and the Wärmeleitstäben 6 and the space is filled to the insulation material 9. As a result, the cell assembly is fixed without play in the housing and tolerances of cell composite and housing are compensated by the potting compound 8. As a potting compound 8 have particularly electrically insulating, but - if only to a small extent - thermally conductive materials such as preferably polyurethane potting compound, epoxy resins and / or silicones proven. With these preferred materials, the respective free spaces are poured out with as little bubbles as possible and particularly preferably free of bubbles. Conveniently, the materials for the potting compound 8 by adding heat conductive particles are still improved in terms of their heat conduction.
In Fig. 6 ist eine Aufsicht auf eine abgewandelte Ausführungsform zu Fig. 4. Hierbei umfasst das Batteriegehäuse auch eine Elektronikkammer 12 für Batterieelektronik, wobei die Elektronikkammer 12 durch eine Trennwand 13 abgetrennt ist. In Fig. 6 is a plan view of a modified embodiment of FIG. 4. Here, the battery case also includes an electronics chamber 12 for battery electronics, wherein the electronic chamber 12 is separated by a partition wall 13.

Claims

Patentansprüche claims
1. Batterie (1) mit einem Gehäuse, das einen Boden (3) und eine Seitenwand (2) umfasst, und mit einem in dem Gehäuse angeordneten Zellverbund von Zellen (4), dadurch gekennzeichnet, dass der Zellverbund mit einer Vergussmasse (8) in dem Gehäuse befestigt ist, wobei die Vergussmasse (8) von dem1. battery (1) with a housing, which comprises a bottom (3) and a side wall (2), and with a cell assembly of cells (4) arranged in the housing, characterized in that the cell assembly is provided with a potting compound (8) is mounted in the housing, wherein the potting compound (8) of the
Zellverbund bis zur Innenseite der Seitenwand (2) reicht.Cell composite extends to the inside of the side wall (2).
2. Batterie (1) nach Anspruch 1, dadurch gekennzeichnet, dass zwischen dem Zellverbund und der Seitenwand (2) keine eine Gießform bildende metallene Zwischenschicht, beispielsweise kein Hüllblech (7) , angeordnet ist.2. Battery (1) according to claim 1, characterized in that between the cell assembly and the side wall (2) no forming a casting metal intermediate layer, for example, no cladding (7) is arranged.
3. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Vergussmasse (8) wärmeleitfähig ist.3. Battery (1) according to any one of the preceding claims, characterized in that the potting compound (8) is thermally conductive.
4. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Vergussmasse (8) elektrisch isolierend ist.4. Battery (1) according to any one of the preceding claims, characterized in that the potting compound (8) is electrically insulating.
5. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Gehäuse auf seiner Innenseite eine Isolationsschicht (11) aufweist, bis zu der die Vergussmasse (8) reicht.5. Battery (1) according to one of the preceding claims, characterized in that the housing has on its inside an insulating layer (11), up to the potting compound (8) extends.
6. Batterie (1) nach Anspruch 5, dadurch gekennzeichnet, dass das Gehäuse auf der Innenseite seiner Seitenwand (2) eine Isolationsschicht (11) aufweist.6. Battery (1) according to claim 5, characterized in that the housing on the inside of its side wall (2) has an insulating layer (11).
7. Batterie (1) nach einem der Ansprüche 5 bis 6, dadurch gekennzeichnet, dass das Gehäuse auf der Innenseite seines Bodens (3) eine Isolationsschicht (11) aufweist .7. Battery (1) according to any one of claims 5 to 6, characterized in that the housing has on the inside of its bottom (3) an insulating layer (11).
8. Batterie (1) nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass das Gehäuse auf seiner Innenseite mit der Isolationsschicht (11) beschichtet ist.8. Battery (1) according to one of claims 5 to 7, characterized in that the housing is coated on its inside with the insulating layer (11).
9. Batterie (1) nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass die Isolationsschicht (11) eine elektrisch und/oder thermisch isolierende Isolationsschicht (11) ist.9. Battery (1) according to one of claims 5 to 8, characterized in that the insulating layer (11) is an electrically and / or thermally insulating insulating layer (11).
10. Batterie (1) nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die Isolationsschicht (11) aus einem festen Schaum (Hart- oder Weichschaum) , insbesondere einem Polyurethan-Schaum gebildet ist.10. Battery (1) according to any one of claims 5 to 9, characterized in that the insulating layer (11) is formed of a solid foam (hard or soft foam), in particular a polyurethane foam.
11. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Zellverbund in das Gehäuse eingesetzt und nach dem Einsetzen in das Gehäuse durch Vergießen mit der Vergussmasse (8) vergossen worden ist. 11. Battery (1) according to any one of the preceding claims, characterized in that the cell composite has been inserted into the housing and sealed after insertion into the housing by casting with the potting compound (8).
12. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Batterie (1) einen Kühlflüssigkeitsanschluss zum Durchleiten einer Kühlflüssigkeit aufweist.12. Battery (1) according to any one of the preceding claims, characterized in that the battery (1) has a cooling liquid connection for passing a cooling liquid.
13. Batterie (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Batterie (1) eine Fahrzeugbatterie, insbesondere eine Batterie (1) für ein Fahrzeug mit Hybridantrieb oder ein Brennstoffzellen- Fahrzeug ist. 13. Battery (1) according to any one of the preceding claims, characterized in that the battery (1) is a vehicle battery, in particular a battery (1) for a vehicle with hybrid drive or a fuel cell vehicle.
PCT/EP2008/001493 2007-02-27 2008-02-26 Battery housing WO2008104356A1 (en)

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