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WO2012032272A1 - Battery comprising a temperature balancing plate - Google Patents

Battery comprising a temperature balancing plate Download PDF

Info

Publication number
WO2012032272A1
WO2012032272A1 PCT/FR2011/052062 FR2011052062W WO2012032272A1 WO 2012032272 A1 WO2012032272 A1 WO 2012032272A1 FR 2011052062 W FR2011052062 W FR 2011052062W WO 2012032272 A1 WO2012032272 A1 WO 2012032272A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
plate
cells
electrical
battery according
Prior art date
Application number
PCT/FR2011/052062
Other languages
French (fr)
Inventor
Bernard Bavoux
Franck Guillemard
Original Assignee
Peugeot Citroën Automobiles SA
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 Peugeot Citroën Automobiles SA filed Critical Peugeot Citroën Automobiles SA
Publication of WO2012032272A1 publication Critical patent/WO2012032272A1/en

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/615Heating or keeping warm
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/617Types of temperature control for achieving uniformity or desired distribution of temperature
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/653Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6553Terminals or leads
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6556Solid parts with flow channel passages or pipes for heat exchange
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the invention relates to a vehicle battery, particularly a motor vehicle, comprising a plurality of cells each comprising two internal or external electrical connection terminals.
  • the invention relates to temperature balancing within the battery.
  • the batteries are formed of a set of cells interconnected in series and / or in parallel.
  • a need is felt to ensure the most uniform temperature possible between the cells and within each cell, during all operating conditions.
  • a need is also felt to be able to cool or heat the cells by maintaining a distributed temperature as uniformly as possible between the different cells and within each cell.
  • the low thermal conductivity and low heat capacity of the air are not conducive to extensive cooling. In its path through a battery in contact with cells hotter than air, the temperature of the air increases gradually. This results in uneven cooling of the cells.
  • the existing cooling devices do not generally take into account the fact that the cells, regardless of their shape, for example cylindrical or prismatic, always have a positive terminal and a negative terminal, these terminals being very good electrical conductors which are also very good thermal conductors.
  • the cells are usually connected in series forming a chain.
  • the series connection makes it possible to obtain globally at the input and output of the battery, a potential difference which cumulates the potential differences of each cell.
  • the two end cells are cooled by the electrical cables to which they are connected.
  • These cables consist of electrical conductors of large section, are also very good thermal conductors.
  • the cell terminals themselves are connected directly to the sheets of the anodes and cathodes which are made of electrically conductive materials, for example copper or aluminum, and therefore are also very good thermal conductors.
  • the cells connected to the terminals of the battery are cooled directly at their center, on each sheet through the terminals and cables to which they are connected.
  • the end cells are cooler than the cells in the center of the battery.
  • the difference in temperature between the cells induces a differentiated aging of these cells.
  • the hottest cells will have a shorter life while the colder ones will have a longer life.
  • the battery life will ultimately be shorter than with identical cell temperatures since the life of a battery consisting of cells placed in series is essentially related to the duration. of life of the hottest cell.
  • a cooler cell can have a lower voltage and provide lower power than if it were warmer. This can be critical, for example for starting a vehicle in winter.
  • DE10003740 proposes to put the connection elements between cells in contact with an electrically insulating cooling plate and thermally good conductor.
  • the disadvantage of this solution is to complicate the production of the battery by adding to the usual assembly operations which consist in connecting the connection elements to the cells, additional operations which consist in putting the cooling plate in thermal contact with the elements of the battery. connection.
  • the object of the invention is to propose a battery equipped with a high-performance balancing plate temperature in the cells and easy to assemble and, if necessary to disassemble.
  • an object of the invention is a vehicle battery, particularly a motor vehicle, comprising a plurality of cells each comprising two positive and negative electrical terminals respectively, electrical connections connected to the electrical terminals so as to connecting the cells together and outside the battery and cooling means of the battery, characterized in that the means comprise a plate made of a thermally conductive material and electrically insulating, which comprises said electrical connections so as to balance the temperature of said cells ..
  • the material comprises a thermally conductive and electrically insulating resin.
  • the resin is an epoxide resin loaded with alumina.
  • the plate comprises said electrical connections by overmoulding so as to be removable.
  • the electrical connections are formed of metal bars.
  • At least one electrical terminal is tapped and the plate has at least one hole passing through the metal bar above the electrical terminal to accommodate a plate fastening element on the electrical terminal ensuring electrical conductivity between the electrical terminal and the metal bar.
  • the plate is deposited on the electrical terminals so that the electrical bars interconnect the corresponding electrical terminals and so as to fix the plate on the terminals by fixing means passing through the bars and engaging in the electrical terminals.
  • the plate comprises a heat exchange circuit for regulating the temperature of the plate.
  • the circuit is metallic.
  • the circuit is hollow for conveying a fluid.
  • the plate is disposed in the upper part of the battery and the battery comprises in the lower part, a second plate-like plate disposed in the upper part.
  • FIG. 1 is a top view of the battery before internal connection of the cells
  • FIG. 2 is a view from above of the battery after internal connection of the cells in the absence of
  • FIG. 3 is a top view of a plate according to the invention.
  • Figure 4 is a side view of the plate of Figure 3;
  • FIG. 5 is a sectional view of the plate of Figure 3 according to the invention.
  • FIG. 6 is a system diagram that implements the invention.
  • a vehicle battery in particular a motor vehicle, generally comprises several cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 which each comprise two electrical terminals 13, 14.
  • the object of the invention is to effectively solve the problem of balancing the cell temperatures of a battery by means of a plate and facilitate the mounting of the battery so equipped.
  • FIG. 1 is a view from above of cells of a conventional battery in which the cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 are cylindrical and comprise terminals 13, 14 of positive and negative connections on the same side.
  • the battery is here represented in a mounting state before interconnection of the cells.
  • the illustrated cell assembly comprises twelve 3.6V lithium-ion cells placed side by side, forming a 43.2-volt battery after serial interconnection.
  • the cells are interconnected in accordance with the following explanations with reference to FIG. 2.
  • Metal connecting bars 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 are each screwed to the terminal 14, forming a cathode, of a cell 1 to 11 and on the terminal 13, forming anode, of the next cell 2 to 12 so as to connect the cells in series.
  • a metal electrical connection bar 15 is screwed on the terminal 13 of the cell 1 and a metal electrical connection bar 16 is screwed on the terminal 14 of the cell 12.
  • the invention essentially consists in connecting their anodes and cathodes by a device, in particular a plate, which is removable and thermally conductive.
  • This device or plate comprises the electrical connections between anodes and cathodes necessary for the operation of the battery, at least one positive and negative contact for the external connection of the battery.
  • the device may further comprise electrically and / or thermally conductive elements connectable to another system for heating or cooling the battery.
  • a heat-conducting plate 20 is produced. by overmoulding the metal connecting bars of the cells.
  • a hollow zone 40 of square shape is left around the fixing holes of the plate 20 on the cells, but it may have another shape, round for example.
  • the overmold resin is a thermo resin ⁇ conductive and electrically insulating, for example an epoxy resin filled with alumina two components, having good adhesion to metals such as E708 resin Epotecny the company, or even the Durapot resin 865 of the final company.
  • Figure 5 is a sectional view of the plate shown in profile in Figure 4.
  • the inclusion of the connection bars in the plate provides a compact assembly that provides two remarkable technical effects.
  • the first technical effect is that of optimizing the heat exchange between the connecting bars and the material of the plate in intimate contact with the connecting bars.
  • the second technical effect is that of considerably facilitating assembly operations.
  • the block positioning of the plate on the cell assembly avoids having to position the many connection bars one by one on each pair of cells. Pre-established contacting of the material of the plate with the connection bars, avoids having to inject at the end of assembly, an additional material such as thermally conductive foam to fill the gaps between connecting bars and plate resulting from a assembly in several stages.
  • the electrical terminals 13 and / or 14 are tapped and the plate 30 has holes passing through the metal bar for the establishment of fasteners of the plate 30 on the electrical terminal 13 and / or 14 ensuring electrical conductivity between the electrical terminal and the metal bar.
  • the elements are in particular screws.
  • the positioning of the cells must be able to adjust slightly to the position of the holes in height and laterally to ensure a good contact by screwing.
  • the holes of the plate 30 may be a little wider in order to have a margin that takes into account the positioning dispersions of the cells. It is also possible to optionally use spring washers to improve contact by allowing better vertical adjustment of the cells.
  • the plate may be welded to the terminals of the cells, or else bonded, or riveted or any other method of attachment.
  • FIG. 5 shows an exemplary embodiment of the device that is the subject of the invention, seen in horizontal section at the level of the electrical connection elements 15, 16 of external connection.
  • a hatch is distinguished by a cooling circuit, which in the illustrated example has two paths 31, 32 of inputs and outputs 33, 34.
  • the cooling circuit is formed by a thermal conductor, for example, a metal mass and or a circuit for a liquid or gaseous coolant.
  • a control circuit with a control logic 41 shown in the diagram of FIG. 6, makes it possible to temporarily connect the pads 35, 36 of the battery 100 to the circuit of the battery during the period necessary to warm the battery. heater.
  • the heating circuit 37 and the cooling circuit 31, 32 may have different shapes so as to have as high a heat exchange surface as possible with the connection bars of the terminals, while remaining electrically isolated therefrom. For example they can walk above or below connecting bars.
  • the bars and the heating and cooling circuits may also have a serrated shape, for example with fractal-shaped patterns to have a greater heat exchange surface within the plate 30.
  • the metal cooling conductors may be oriented and / or physically connected to a cold source 42, in contact with the outside air and / or the cooling system of the car.
  • the heating or cooling circuits of the plate 30 may be hollow circuits which convey a gas or a liquid. These fluids may be those already provided for cooling the rest of the battery and the periphery of the cells. Circulation of gases and liquids may in some cases replace other means of cooling the battery.
  • the heating and / or cooling circuits may be controlled by a valve system and / or use the vehicle heating and / or cooling circuits.
  • Cooling circuits can give rise to the production of thermoelectricity, for example by using a well known device based on the Seebeck effect not shown in the figure and a cold source in contact with the outside air and or the cooling system of the car.
  • the electricity thus generated can be used to operate a coolant circulation pump.
  • this pump can operate according to an already known principle of Magneto-Hydro-Dynamics (MHD).
  • MHD Magneto-Hydro-Dynamics
  • a device according to the invention comprises at least the plate 30 in which are embedded the cells connecting rods, by overmoulding in a thermo ⁇ conductive resin.
  • the function provided is limited to a better balancing of the temperature of the cells.
  • the plate comprises an electrical circuit for implementing a self-heating of the battery 100.
  • the plate 30 comprises two terminals which are connected by an external connection, one to a terminal of the battery on the plate and the other to an electrical switching circuit 43 or to a switch external to the plate, the other terminal of the switch being connected to the other terminal of the battery.
  • a control logic using at least one sensor or a temperature estimator of the battery to drive the switch to implement the self-heating circuit at the moment required and for the duration required.
  • the plate comprises one or more cooling devices which can be solid conductors for example metal cables or plates, or tubes for circulating a fluid. These plate cooling devices are connected by means external to the plate to a cold source 42 external to the plate 30.
  • the connection means are similar in nature to those included in the plate, that is to say either solid conductors of heat, for example cables or metal plates permanently connected to the plate, or a switching device and / or circulation fluid driven by control logic 41.
  • the battery system comprises a switching device 44 of fluid in the form of a Magneto-Hydro-Dynamic device (MHD).
  • MHD Magneto-Hydro-Dynamic device
  • the system shown in FIG. 6 also optionally comprises a device 45 for electrical generation by thermoelectricity outside the plate 30.

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

Abstract

The invention balances the temperature of the cells of a vehicle battery, particularly a motor vehicle battery, comprising a plurality of cells (1, 2,..., 12) each including two electric terminals (13, 14), positive and negative respectively, electric connections (15-27) connected to the electric terminals in order to connect the cells to one another and to the exterior of the battery, and battery cooling means comprising a plate (30) which is made from a thermally conductive and electrically insulating material and which includes said electric connections (15, 16, 17, 18,..., 27).

Description

BATTERIE COMPRENANT UNE PLAQUE D'EQUILIBRAGE DE  BATTERY COMPRISING A BALANCING PLATE OF
TEMPERATURE  TEMPERATURE
L'invention concerne une batterie de véhicule, notamment de véhicule automobile, comprenant plusieurs cellules qui comportent chacune deux bornes électriques de raccordement internes ou externes. The invention relates to a vehicle battery, particularly a motor vehicle, comprising a plurality of cells each comprising two internal or external electrical connection terminals.
Plus précisément, l'invention concerne l'équilibrage de température au sein de la batterie.  More specifically, the invention relates to temperature balancing within the battery.
Généralement, les batteries sont formées d'un ensemble de cellules interconnectées en série et/ou en parallèle. En vue d'optimiser l'exploitation de la batterie, un besoin se fait sentir pour assurer une température la plus uniforme possible entre les différentes cellules et au sein de chaque cellule, durant toutes les conditions de leur fonctionnement. Un besoin se fait sentir aussi de pouvoir refroidir ou réchauffer les cellules en maintenant une température répartie le plus uniformément possible entre les différentes cellules et au sein de chaque cellule. Un besoin se fait sentir encore de pouvoir refroidir ou réchauffer les cellules de façon la plus efficace possible.  Generally, the batteries are formed of a set of cells interconnected in series and / or in parallel. In order to optimize the operation of the battery, a need is felt to ensure the most uniform temperature possible between the cells and within each cell, during all operating conditions. A need is also felt to be able to cool or heat the cells by maintaining a distributed temperature as uniformly as possible between the different cells and within each cell. There is a need to be able to cool or heat cells as efficiently as possible.
Pour réchauffer ou refroidir les cellules de la batterie, il existe de nombreux dispositifs qui mettent en œuvre une ventilation par air ou une circulation de fluide liquide, à l'extérieur de la batterie ou entre les cellules. L'inconvénient de ces dispositifs est que l'air ou le fluide ne sont généralement en contact qu'avec une partie des cellules de la batterie.  To warm or cool the cells of the battery, there are many devices that implement air ventilation or circulation of liquid fluid, outside the battery or between the cells. The disadvantage of these devices is that the air or the fluid is generally in contact with only a portion of the cells of the battery.
La faible conductibilité thermique et la faible capacité thermique de l'air ne sont pas propices à un refroidissement poussé. Dans son cheminement au travers d'une batterie au contact des cellules plus chaudes que l'air, la température de l'air augmente progressivement. II en résulte un refroidissement inégal des cellules.  The low thermal conductivity and low heat capacity of the air are not conducive to extensive cooling. In its path through a battery in contact with cells hotter than air, the temperature of the air increases gradually. This results in uneven cooling of the cells.
Une solution consistant simplement à faire circuler un liquide de refroidissement au travers d'un circuit creux, par exemple une enveloppe en polymère disposée entre les cellules de la batterie, n'est pas totalement satisfaisante car, le contact thermique se faisant sur une partie de la surface extérieure de certaines cellules, notamment sur la face la plus large de celles- ci, il est difficile d'assurer une température égale. A solution consisting simply in circulating a coolant through a circuit hollow, for example a polymer envelope disposed between the cells of the battery, is not completely satisfactory because, the thermal contact being made on a part of the outer surface of certain cells, in particular on the widest face of these cells. it is difficult to ensure an equal temperature.
Les dispositifs de refroidissement existant ne prennent généralement pas en compte le fait que les cellules, indépendamment de leur forme par exemple cylindrique ou prismatique, ont toujours une borne positive et une borne négative, ces bornes étant de très bons conducteurs électriques qui sont aussi de très bons conducteurs thermiques.  The existing cooling devices do not generally take into account the fact that the cells, regardless of their shape, for example cylindrical or prismatic, always have a positive terminal and a negative terminal, these terminals being very good electrical conductors which are also very good thermal conductors.
De façon à obtenir une différence de potentiel totale suffisamment élevée par rapport au besoin d'une application donnée, les cellules sont habituellement reliées en série en formant une chaîne. Le montage en série permet d'obtenir globalement en entrée et sortie de la batterie, une différence de potentiel qui cumule les différences de potentiel de chaque cellule.  In order to obtain a sufficiently high total potential difference with respect to the need for a given application, the cells are usually connected in series forming a chain. The series connection makes it possible to obtain globally at the input and output of the battery, a potential difference which cumulates the potential differences of each cell.
Or les deux cellules en extrémité sont refroidies par les câbles électriques auxquels elles sont connectées. Ces câbles constitués de conducteurs électriques de forte section, sont aussi de très bons conducteurs thermiques. Les bornes des cellules sont elles mêmes reliées directement aux feuilles des anodes et des cathodes qui sont en matériaux conducteurs électriques, par exemple en cuivre ou en aluminium, et de ce fait sont aussi de très bon conducteurs thermiques. Ainsi, les cellules reliées aux bornes de la batterie se trouvent refroidies directement en leur centre, sur chaque feuille au travers des bornes et des câbles auxquels elles sont reliées. Il en résulte que les cellules en extrémité sont plus froides que les cellules qui se trouvent au centre de la batterie.  Now the two end cells are cooled by the electrical cables to which they are connected. These cables consist of electrical conductors of large section, are also very good thermal conductors. The cell terminals themselves are connected directly to the sheets of the anodes and cathodes which are made of electrically conductive materials, for example copper or aluminum, and therefore are also very good thermal conductors. Thus, the cells connected to the terminals of the battery are cooled directly at their center, on each sheet through the terminals and cables to which they are connected. As a result, the end cells are cooler than the cells in the center of the battery.
Sachant que la température d'une cellule influence de façon considérable les pertes lors de la charge et décharge d'une cellule, on comprend que la différence systématique de température entre les cellules, pour les raisons mentionnées ci-dessus, peut introduire un déséquilibre entre les tensions de chaque cellule, c'est- à-dire leur état de charge électrique. Si il n'est pas traité régulièrement, ce déséquilibre a pour effet de diminuer la capacité de l'ensemble de la batterie. Knowing that the temperature of a cell considerably influences the losses during charging and discharge of a cell, it is understood that the systematic temperature difference between the cells, for the reasons mentioned above, can introduce an imbalance between the voltages of each cell, that is to say their state of electric charge. If it is not treated regularly, this imbalance has the effect of reducing the capacity of the entire battery.
D'autre part la différence de température entre les cellules induit un vieillissement différencié de ces cellules. En l'occurrence, les cellules les plus chaudes auront une durée de vie plus courte alors que les plus froides auront une durée de vie plus longue. Avec des températures différentes entre les cellules, la durée de vie de la batterie sera au final plus réduite qu'avec des températures de cellules toutes identiques puisque la durée de vie d'une batterie constituée de cellules mises en série est essentiellement liée à la durée de vie de la cellule la plus chaude.  On the other hand, the difference in temperature between the cells induces a differentiated aging of these cells. In this case, the hottest cells will have a shorter life while the colder ones will have a longer life. With different temperatures between cells, the battery life will ultimately be shorter than with identical cell temperatures since the life of a battery consisting of cells placed in series is essentially related to the duration. of life of the hottest cell.
Enfin, une cellule plus froide peut avoir une tension plus basse et fournir une puissance plus faible que si elle était plus chaude. Ceci peut être critique, par exemple pour le démarrage d'un véhicule en hiver.  Finally, a cooler cell can have a lower voltage and provide lower power than if it were warmer. This can be critical, for example for starting a vehicle in winter.
L'état connu de la technique a proposé des solutions qui ne sont pas satisfaisantes.  The state of the art has proposed solutions that are unsatisfactory.
Le document DE10003740 propose de mettre les éléments de connexion entre cellules, en contact avec une plaque de refroidissement électriquement isolante et thermiquement bonne conductrice. L'inconvénient de cette solution est de compliquer la réalisation de la batterie en ajoutant aux opérations de montage habituelles qui consistent à relier les éléments de connexion aux cellules, des opérations supplémentaires qui consistent à mettre la plaque de refroidissement en contact thermique avec les éléments de connexion.  DE10003740 proposes to put the connection elements between cells in contact with an electrically insulating cooling plate and thermally good conductor. The disadvantage of this solution is to complicate the production of the battery by adding to the usual assembly operations which consist in connecting the connection elements to the cells, additional operations which consist in putting the cooling plate in thermal contact with the elements of the battery. connection.
L'invention a pour but de proposer une batterie équipée d'une plaque d'équilibrage performant de température dans les cellules et facile à monter et, le cas échéant à démonter. The object of the invention is to propose a battery equipped with a high-performance balancing plate temperature in the cells and easy to assemble and, if necessary to disassemble.
Pour atteindre le but fixé, un objet de l'invention est une batterie de véhicule, notamment de véhicule automobile, comprenant une pluralité de cellules qui comportent chacune deux bornes électriques respectivement positive et négative, des liaisons électriques raccordées sur les bornes électriques de façon à relier les cellules entre elles et à l'extérieur de la batterie et des moyens de refroidissement de la batterie, caractérisée en ce que les moyens comprennent une plaque en un matériau thermiquement conducteur et électriquement isolant, qui comporte lesdites liaisons électriques de façon à équilibrer la température des dites cellules..  To achieve the object, an object of the invention is a vehicle battery, particularly a motor vehicle, comprising a plurality of cells each comprising two positive and negative electrical terminals respectively, electrical connections connected to the electrical terminals so as to connecting the cells together and outside the battery and cooling means of the battery, characterized in that the means comprise a plate made of a thermally conductive material and electrically insulating, which comprises said electrical connections so as to balance the temperature of said cells ..
Particulièrement, le matériau comprend une résine thermo conductrice et électriquement isolante.  In particular, the material comprises a thermally conductive and electrically insulating resin.
Plus particulièrement, la résine est une résine époxyde chargée à l'alumine.  More particularly, the resin is an epoxide resin loaded with alumina.
Avantageusement, la plaque comporte lesdites liaisons électriques par surmoulage de façon à être amovible .  Advantageously, the plate comprises said electrical connections by overmoulding so as to be removable.
De préférence, les liaisons électriques sont formées de barres métalliques.  Preferably, the electrical connections are formed of metal bars.
Particulièrement, au moins une borne électrique est taraudée et la plaque comporte au moins un trou traversant la barre métallique au dessus de la borne électrique pour loger un élément de fixation de la plaque sur la borne électrique en assurant une conductivité électrique entre la borne électrique et la barre métallique.  Specifically, at least one electrical terminal is tapped and the plate has at least one hole passing through the metal bar above the electrical terminal to accommodate a plate fastening element on the electrical terminal ensuring electrical conductivity between the electrical terminal and the metal bar.
En d'autres termes, la plaque est déposée sur les bornes électriques de façon à ce que les barres électriques interconnectent les bornes électriques correspondantes et de façon à fixer la plaque sur les bornes par des moyens de fixation traversant les barres et s 'engageant dans les bornes électriques. Avantageusement aussi, la plaque comprend un circuit d'échange thermique pour réguler la température de la plaque. In other words, the plate is deposited on the electrical terminals so that the electrical bars interconnect the corresponding electrical terminals and so as to fix the plate on the terminals by fixing means passing through the bars and engaging in the electrical terminals. Advantageously also, the plate comprises a heat exchange circuit for regulating the temperature of the plate.
Particulièrement, le circuit est métallique.  In particular, the circuit is metallic.
Particulièrement aussi, le circuit est creux pour véhiculer un fluide.  In particular, the circuit is hollow for conveying a fluid.
Dans un mode particulier de mise en œuvre, la plaque est disposée en partie supérieure de la batterie et la batterie comprend en partie inférieure, une deuxième plaque semblable à la plaque disposée en partie supérieure .  In a particular mode of implementation, the plate is disposed in the upper part of the battery and the battery comprises in the lower part, a second plate-like plate disposed in the upper part.
D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels :  Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limitative, with reference to the appended drawings, in which:
- la figure 1 est une vue de dessus de la batterie avant raccordement interne des cellules ;  - Figure 1 is a top view of the battery before internal connection of the cells;
- la figure 2 est une vue de dessus de la batterie après raccordement interne des cellules en absence de FIG. 2 is a view from above of the battery after internal connection of the cells in the absence of
1 ' invention; The invention;
- la figure 3 est une vue de dessus d'une plaque conforme à l'invention;  - Figure 3 is a top view of a plate according to the invention;
- la figure 4 est une vue de côté de la plaque de la figure 3;  Figure 4 is a side view of the plate of Figure 3;
- la figure 5 est une vue en coupe de la plaque de la figure 3 conforme à l'invention;  - Figure 5 is a sectional view of the plate of Figure 3 according to the invention;
la figure 6 est un schéma de système qui met l'invention en oeuvre.  Figure 6 is a system diagram that implements the invention.
Comme représenté sur les figures 1 et 2, une batterie de véhicule, notamment de véhicule automobile, comprend généralement plusieurs cellules 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 qui comportent chacune deux bornes électriques 13, 14.  As represented in FIGS. 1 and 2, a vehicle battery, in particular a motor vehicle, generally comprises several cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 which each comprise two electrical terminals 13, 14.
Comme indiqué ci-dessus, l'invention a pour but de régler efficacement le problème de l'équilibrage des températures de cellules d'une batterie au moyen d'une plaque et de faciliter le montage de la batterie ainsi équipée . As indicated above, the object of the invention is to effectively solve the problem of balancing the cell temperatures of a battery by means of a plate and facilitate the mounting of the battery so equipped.
La figure 1 est une vue de dessus de cellules d'une batterie classique dans laquelle les cellules 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 sont cylindriques et comportent des bornes 13, 14 de connections positives et négatives sur le même coté. La batterie est ici représentée dans un état de montage avant interconnexion des cellules. L'assemblage de cellules illustré comprend douze éléments Lithium-ion de 3,6 V mis cote à cote, permettant de former une batterie de 43,2 volts, après interconnexion en série.  FIG. 1 is a view from above of cells of a conventional battery in which the cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 are cylindrical and comprise terminals 13, 14 of positive and negative connections on the same side. The battery is here represented in a mounting state before interconnection of the cells. The illustrated cell assembly comprises twelve 3.6V lithium-ion cells placed side by side, forming a 43.2-volt battery after serial interconnection.
Les cellules sont interconnectées conformément aux explications qui suivent en référence à la figure 2. Des barres métalliques de liaison électrique 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, sont vissées chacune sur la borne 14, formant cathode, d'une cellule 1 à 11 et sur la borne 13, formant anode, de la cellule 2 à 12 suivante de façon à connecter les cellules en série. Une barre métallique de liaison électrique 15 est vissée sur la borne 13 de la cellule 1 et une barre métallique de liaison électrique 16 est vissée sur la borne 14 de la cellule 12.  The cells are interconnected in accordance with the following explanations with reference to FIG. 2. Metal connecting bars 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 are each screwed to the terminal 14, forming a cathode, of a cell 1 to 11 and on the terminal 13, forming anode, of the next cell 2 to 12 so as to connect the cells in series. A metal electrical connection bar 15 is screwed on the terminal 13 of the cell 1 and a metal electrical connection bar 16 is screwed on the terminal 14 of the cell 12.
De façon à équilibrer la température des différentes cellules d'une batterie, l'invention consiste essentiellement à relier leurs anodes et cathodes par un dispositif, notamment une plaque, amovible et thermiquement conducteur. Ce dispositif ou plaque, comporte les liaisons électriques entre anodes et cathodes nécessaires au fonctionnement de la batterie, au moins un contact positif et négatif pour le raccordement externe de la batterie. Optionnellement , le dispositif peut de plus comporter des éléments électriquement et ou thermiquement conducteurs connectables à un autre système pour réchauffer ou refroidir la batterie.  In order to balance the temperature of the different cells of a battery, the invention essentially consists in connecting their anodes and cathodes by a device, in particular a plate, which is removable and thermally conductive. This device or plate comprises the electrical connections between anodes and cathodes necessary for the operation of the battery, at least one positive and negative contact for the external connection of the battery. Optionally, the device may further comprise electrically and / or thermally conductive elements connectable to another system for heating or cooling the battery.
Pour obtenir le dispositif qui fait l'objet de l'invention, on réalise une plaque 20 thermo-conductrice en surmoulant les barres métalliques de connexion des cellules. Sur l'exemple de la figure 3, une zone creuse 40 de forme carrée est laissée autour des trous de fixation de la plaque 20 sur les cellules, mais elle peut avoir une autre forme, ronde par exemple. In order to obtain the device which is the subject of the invention, a heat-conducting plate 20 is produced. by overmoulding the metal connecting bars of the cells. In the example of Figure 3, a hollow zone 40 of square shape is left around the fixing holes of the plate 20 on the cells, but it may have another shape, round for example.
La résine de surmoulage est une résine thermo¬ conductrice et électriquement isolante, par exemple une résine époxyde chargée à l'alumine en deux composants, ayant une bonne adhérence aux métaux comme la résine E708 de la société Epotecny, ou bien encore la résine Durapot 865 de la société Final. The overmold resin is a thermo resin ¬ conductive and electrically insulating, for example an epoxy resin filled with alumina two components, having good adhesion to metals such as E708 resin Epotecny the company, or even the Durapot resin 865 of the final company.
Sur ce schéma de la figure 3, on a représenté en pointillé seulement certains éléments intérieurs, notamment les barres 17 à 27 qui relient les cellules.  In this diagram of Figure 3, there is shown in dotted only some interior elements, including the bars 17 to 27 which connect the cells.
La figure 5 est une vue en coupe de la plaque représentée en profil sur la figure 4. L'inclusion des barres de connexion dans la plaque permet d'obtenir un ensemble compact qui procure deux effets techniques remarquables .  Figure 5 is a sectional view of the plate shown in profile in Figure 4. The inclusion of the connection bars in the plate provides a compact assembly that provides two remarkable technical effects.
Le premier effet technique est celui d'optimiser les échanges thermiques entre les barres de connexion et le matériau de la plaque en contact intime avec les barres de connexion.  The first technical effect is that of optimizing the heat exchange between the connecting bars and the material of the plate in intimate contact with the connecting bars.
Le deuxième effet technique est celui de faciliter considérablement les opérations de montage. Le positionnement en bloc de la plaque sur l'assemblage de cellules, évite de devoir positionner les nombreuses barres de connexion une à une sur chaque paire de cellules. La mise en contact préétablie du matériau de la plaque avec les barres de connexion, évite de devoir injecter en fin de montage, une matière supplémentaire telle que de la mousse thermo-conductrice pour combler les interstices entre barres de connexion et plaque résultant d'un montage en plusieurs étapes.  The second technical effect is that of considerably facilitating assembly operations. The block positioning of the plate on the cell assembly avoids having to position the many connection bars one by one on each pair of cells. Pre-established contacting of the material of the plate with the connection bars, avoids having to inject at the end of assembly, an additional material such as thermally conductive foam to fill the gaps between connecting bars and plate resulting from a assembly in several stages.
Dans un premier mode de raccordement de la plaque 30 aux cellules 1 à 12, les bornes électriques 13 et/ou 14 sont taraudées et la plaque 30 comporte des trous traversant la barre métallique pour la mise en place d'éléments de fixation de la plaque 30 sur la borne électrique 13 et/ou 14 en assurant une conductivité électrique entre la borne électrique et la barre métallique. Les éléments sont notamment des vis. In a first method of connecting the plate 30 to the cells 1 to 12, the electrical terminals 13 and / or 14 are tapped and the plate 30 has holes passing through the metal bar for the establishment of fasteners of the plate 30 on the electrical terminal 13 and / or 14 ensuring electrical conductivity between the electrical terminal and the metal bar. The elements are in particular screws.
Dans une fixation vissée, le positionnement des cellules doit pouvoir s'ajuster légèrement à la position des trous en hauteur et latéralement afin d'assurer un bon contact par vissage. Pour faciliter ce positionnement, les trous de la plaque 30 peuvent être un peu plus larges afin d'avoir une marge qui tienne compte des dispersions de positionnement des cellules. Il est aussi possible d'utiliser éventuellement des rondelles élastiques pour améliorer le contact en permettant un meilleur ajustement vertical des cellules.  In a screwed fastener, the positioning of the cells must be able to adjust slightly to the position of the holes in height and laterally to ensure a good contact by screwing. To facilitate this positioning, the holes of the plate 30 may be a little wider in order to have a margin that takes into account the positioning dispersions of the cells. It is also possible to optionally use spring washers to improve contact by allowing better vertical adjustment of the cells.
Dans un autre mode de réalisation, la plaque peut être soudée aux bornes des cellules, ou bien encore collée, ou encore rivetée ou selon tout autre mode de fixation .  In another embodiment, the plate may be welded to the terminals of the cells, or else bonded, or riveted or any other method of attachment.
La figure 5 montre un exemple de réalisation du dispositif objet de l'invention, vu en coupe horizontale au niveau des éléments de liaisons électrique 15, 16 de raccordement externe.  FIG. 5 shows an exemplary embodiment of the device that is the subject of the invention, seen in horizontal section at the level of the electrical connection elements 15, 16 of external connection.
Dans le schéma de la figure 5, on distingue les liaisons électriques 17, 18, 27 de raccordement interne constituées par les barres de raccordement en série des cellules d'une batterie sur laquelle sera montée la plaque 30. Les liaisons électriques 15, 16, réalisent respectivement un plot d'entrée négatif et un plot de sortie positif vers l'extérieur après montage de la plaque directement sur les cellules.  In the diagram of FIG. 5, there are the internal connections 17, 18, 27 of internal connection constituted by the series connection bars of the cells of a battery on which the plate 30 will be mounted. The electrical connections 15, 16, respectively realize a negative input pad and a positive output pad to the outside after mounting the plate directly on the cells.
On distingue en hachuré un circuit de refroidissement, qui sur l'exemple illustré, possède deux voies 31, 32 d'entrées et sorties 33, 34. Le circuit de refroidissement est formé par un conducteur thermique, par exemple, une masse métallique et ou un circuit pour un fluide caloporteur liquide ou gazeux. On distingue aussi deux plots 35, 36 d'un circuit 37 de chauffage, réalisé par un fil résistif qui chemine du plot 35 au plan 36 entre les barres de connexions. Le fil permet un auto réchauffement de la batterie, notamment lorsque la batterie est trop froide pour pouvoir fournir une énergie suffisante au besoin du véhicule. Dans ce cas un circuit de commande avec une logique de pilotage 41, représentée sur le schéma de la figure 6, permet de relier temporairement, pendant la durée nécessaire pour réchauffer la batterie, les plots 35, 36 de la batterie 100 à ce circuit de chauffage. Ainsi, non seulement la batterie va s'échauffer en fournissant du courant, sachant que la résistance interne de la batterie froide, est plus élevée que lorsque la batterie est chaude, mais de plus, le courant circulant dans le circuit 37, va par effet joule chauffer la plaque 30 de sorte qu'une bonne partie de la chaleur ainsi produite va être directement réinjectée dans la batterie au travers des bornes 13, 14 de ses cellules 1 à 12. A hatch is distinguished by a cooling circuit, which in the illustrated example has two paths 31, 32 of inputs and outputs 33, 34. The cooling circuit is formed by a thermal conductor, for example, a metal mass and or a circuit for a liquid or gaseous coolant. There are also two pads 35, 36 of a heating circuit 37, made by a resistive wire which travels from the pad 35 to the plane 36 between the connection bars. The wire allows a self warming of the battery, especially when the battery is too cold to be able to provide sufficient energy to the need of the vehicle. In this case, a control circuit with a control logic 41, shown in the diagram of FIG. 6, makes it possible to temporarily connect the pads 35, 36 of the battery 100 to the circuit of the battery during the period necessary to warm the battery. heater. Thus, not only will the battery be heated by supplying current, knowing that the internal resistance of the cold battery is higher than when the battery is hot, but moreover, the current flowing in the circuit 37 goes through joule heat the plate 30 so that a good part of the heat thus produced will be directly fed back into the battery through the terminals 13, 14 of its cells 1 to 12.
Le circuit 37 de chauffage et le circuit 31, 32 de refroidissement peuvent avoir différentes formes de façon à présenter une surface d'échange thermique la plus élevée possible avec les barres de connexion des bornes, tout en restant électriquement isolés de celles-ci. Par exemple ils peuvent cheminer au dessus ou en dessous de des barres de connexion.  The heating circuit 37 and the cooling circuit 31, 32 may have different shapes so as to have as high a heat exchange surface as possible with the connection bars of the terminals, while remaining electrically isolated therefrom. For example they can walk above or below connecting bars.
Les barres et les circuits de chauffage et de refroidissement peuvent aussi avoir une forme dentelée, par exemple avec des motifs en forme de fractales pour présenter une plus grande surface d'échange thermique au sein de la plaque 30.  The bars and the heating and cooling circuits may also have a serrated shape, for example with fractal-shaped patterns to have a greater heat exchange surface within the plate 30.
Les conducteurs métalliques de refroidissement peuvent être orientés et/ou reliés physiquement à une source froide 42, en contact avec l'air extérieur et/ou le système de refroidissement de la voiture.  The metal cooling conductors may be oriented and / or physically connected to a cold source 42, in contact with the outside air and / or the cooling system of the car.
Les circuits de chauffage ou de refroidissement de la plaque 30 peuvent être des circuits creux qui véhiculent un gaz ou un liquide. Ces fluides peuvent être ceux déjà prévu pour le refroidissement du reste de la batterie et de la périphérie des cellules. La circulation des gaz et liquides, peut dans certains cas remplacer les autres moyens de refroidissement de la batterie. Les circuits de chauffage et/ou de refroidissement peuvent être pilotés par un système de vannes et/ou utiliser les circuits de chauffage et ou de climatisation du véhicule. The heating or cooling circuits of the plate 30 may be hollow circuits which convey a gas or a liquid. These fluids may be those already provided for cooling the rest of the battery and the periphery of the cells. Circulation of gases and liquids may in some cases replace other means of cooling the battery. The heating and / or cooling circuits may be controlled by a valve system and / or use the vehicle heating and / or cooling circuits.
Les circuits de refroidissement, quelque soit leur nature, peuvent donner lieu à la production de thermoélectricité, par exemple en utilisant un dispositif bien connu à base d'effet Seebeck non présenté sur la figure et une source froide en contact avec l'air extérieur et ou le système de refroidissement de la voiture. L'électricité ainsi générée peut être utilisée pour actionner une pompe de circulation de fluide refroidissant. Dans une variante, cette pompe peut fonctionner selon un principe déjà connu de Magnéto- Hydro-Dynamique (MHD) .  Cooling circuits, whatever their nature, can give rise to the production of thermoelectricity, for example by using a well known device based on the Seebeck effect not shown in the figure and a cold source in contact with the outside air and or the cooling system of the car. The electricity thus generated can be used to operate a coolant circulation pump. In a variant, this pump can operate according to an already known principle of Magneto-Hydro-Dynamics (MHD).
Les explications qui viennent d'être données s'appliquent à des cellules qui comprennent anode et cathode sur une même face. L'invention s'applique aussi à des cellules qui comportent une anode et une cathode placées en leurs deux extrémités. Ces cellules sont habituellement montées tête-bêche afin de faciliter leur raccordement en série. Dans ce cas une variante de l'invention comporte deux plaques sur le même principe en dessus et en dessous de la batterie.  The explanations which have just been given apply to cells which comprise anode and cathode on one and the same face. The invention also applies to cells that have an anode and a cathode placed at both ends. These cells are usually mounted upside down to facilitate their series connection. In this case a variant of the invention comprises two plates on the same principle above and below the battery.
Nous venons de voir qu'un dispositif conforme à l'invention comporte au minimum la plaque 30, dans laquelle sont incrustées les barres de raccordement des cellules, par surmoulage dans une résine thermo¬ conductrice. Dans ce cas la fonction assurée est limitée à un meilleur équilibrage de la température des cellules. We have seen that a device according to the invention comprises at least the plate 30 in which are embedded the cells connecting rods, by overmoulding in a thermo ¬ conductive resin. In this case the function provided is limited to a better balancing of the temperature of the cells.
Optionnellement , la plaque comprend un circuit électrique pour mettre en œuvre un auto-échauffement de la batterie 100. Dans ce cas la plaque 30 comprend deux bornes qui sont reliées par une connexion externe, l'une à une borne de la batterie sur la plaque et l'autre à un circuit de commutation électrique 43 ou à un interrupteur externe à la plaque, l'autre borne de l'interrupteur étant relié à l'autre borne de la batterie. A l'extérieur de la plaque il est nécessaire de mettre en œuvre une logique de pilotage utilisant au moins un capteur ou un estimateur de température de la batterie pour piloter l'interrupteur afin de mettre en œuvre le circuit d'auto- échauffement au moment requis et pendant la durée requise . Optionally, the plate comprises an electrical circuit for implementing a self-heating of the battery 100. In this case the plate 30 comprises two terminals which are connected by an external connection, one to a terminal of the battery on the plate and the other to an electrical switching circuit 43 or to a switch external to the plate, the other terminal of the switch being connected to the other terminal of the battery. Outside the plate it is necessary to implement a control logic using at least one sensor or a temperature estimator of the battery to drive the switch to implement the self-heating circuit at the moment required and for the duration required.
Optionnellement la plaque comprend un ou plusieurs dispositifs de refroidissement qui peuvent être des conducteurs solides par exemple des câbles ou plaques métalliques, ou des tubes permettant de faire circuler un fluide. Ces dispositifs de refroidissement de la plaque sont connectés par des moyens externes à la plaque vers une source froide 42 externe à la plaque 30. Les moyens de connexions sont de nature similaire à ceux inclus dans la plaque, c'est-à-dire soit des conducteurs solide de la chaleur, par exemple des câbles ou plaques métalliques connectés en permanence à la plaque, soit un dispositif de commutation et ou de circulation de fluides actionné par logique de pilotage 41. Optionnellement le système de batterie comprend un dispositif 44 de commutation de fluide sous forme d'un dispositif Magnéto-Hydro-Dynamique (MHD) .  Optionally the plate comprises one or more cooling devices which can be solid conductors for example metal cables or plates, or tubes for circulating a fluid. These plate cooling devices are connected by means external to the plate to a cold source 42 external to the plate 30. The connection means are similar in nature to those included in the plate, that is to say either solid conductors of heat, for example cables or metal plates permanently connected to the plate, or a switching device and / or circulation fluid driven by control logic 41. Optionally the battery system comprises a switching device 44 of fluid in the form of a Magneto-Hydro-Dynamic device (MHD).
Le système représenté sur la figure 6 comprend aussi optionnellement un dispositif 45 de génération électrique par thermoélectricité hors de la plaque 30.  The system shown in FIG. 6 also optionally comprises a device 45 for electrical generation by thermoelectricity outside the plate 30.

Claims

REVENDICATIONS
1. Batterie de véhicule, notamment de véhicule automobile, comprenant une pluralité de cellules (1, 2, 12) qui comportent chacune deux bornes électriquesA vehicle battery, in particular a motor vehicle, comprising a plurality of cells (1, 2, 12) each comprising two electrical terminals
(13, 14) respectivement positive et négative, des liaisons électriques (15-27) raccordées sur les bornes électriques de façon à relier les cellules entre elles et à l'extérieur de la batterie et des moyens de refroidissement de la batterie, caractérisée en ce que les moyens comprennent une plaque (30) en un matériau thermiquement conducteur et électriquement isolant, qui comporte lesdites liaisons électriques (15, 16, 17, 18, 27) de façon à équilibrer la température des dites cellules (1, 2, 12), en ce que le matériau de la plaque (30) comprend une résine thermo conductrice et électriquement isolante et en ce que ladite résine est une résine époxyde chargée à l'alumine. (13, 14) respectively positive and negative, electrical connections (15-27) connected to the electrical terminals so as to connect the cells together and outside the battery and cooling means of the battery, characterized in the means comprise a plate (30) of a thermally conductive and electrically insulating material, which comprises said electrical connections (15, 16, 17, 18, 27) so as to balance the temperature of said cells (1, 2, 12 ), in that the material of the plate (30) comprises a thermally conductive and electrically insulating resin and in that said resin is an epoxy resin filled with alumina.
2. Batterie selon la revendication 1, caractérisé en ce que la plaque (30) comporte lesdites liaisons électriques par surmoulage de façon à être amovible . 2. Battery according to claim 1, characterized in that the plate (30) comprises said electrical connections by overmoulding so as to be removable.
3. Batterie selon l'une des revendications précédentes, caractérisé en ce que les liaisons électriques sont formées de barres métalliques. 3. Battery according to one of the preceding claims, characterized in that the electrical connections are formed of metal bars.
4. Batterie selon la revendication 3, caractérisé en ce qu'au moins une borne électrique (13, 14) est taraudée et en ce que la plaque (30) comporte au moins un trou traversant la barre métallique au dessus de la borne électrique pour loger un élément de fixation de la plaque (30) sur ladite borne électrique en assurant une conductivité électrique entre la borne électrique et la barre métallique. 4. Battery according to claim 3, characterized in that at least one electrical terminal (13, 14) is tapped and in that the plate (30) has at least one hole through the metal bar above the electrical terminal for housing a plate fastener (30) on said electrical terminal providing electrical conductivity between the electrical terminal and the metal bar.
5. Batterie selon l'une des revendications précédentes, caractérisé en ce que la plaque (30) comprend un circuit d'échange thermique (31, 32, 37) pour réguler la température de la plaque (30) . 5. Battery according to one of the preceding claims, characterized in that the plate (30) comprises a heat exchange circuit (31, 32, 37) for regulating the temperature of the plate (30).
6. Batterie selon la revendication 5, caractérisé en ce que ledit circuit est métallique. 6. Battery according to claim 5, characterized in that said circuit is metallic.
7. Batterie selon la revendication 5 ou 6, caractérisé en ce que ledit circuit est creux pour véhiculer un fluide. 7. Battery according to claim 5 or 6, characterized in that said circuit is hollow for conveying a fluid.
8. Batterie selon l'une des revendications précédentes, caractérisé en ce que la plaque (30) est disposée en partie supérieure de la batterie et en ce qu'elle comprend une deuxième plaque semblable à la plaque (30) en partie inférieure de la batterie. 8. Battery according to one of the preceding claims, characterized in that the plate (30) is disposed in the upper part of the battery and in that it comprises a second plate similar to the plate (30) in the lower part of the battery. drums.
PCT/FR2011/052062 2010-09-09 2011-09-08 Battery comprising a temperature balancing plate WO2012032272A1 (en)

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FR1057165A FR2964799B1 (en) 2010-09-09 2010-09-09 BATTERY COMPRISING A TEMPERATURE BALANCING PLATE
FR1057165 2010-09-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832226A (en) * 2018-06-12 2018-11-16 芜湖爱丽机电科技有限公司 A kind of power battery cooling device for new-energy automobile

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830936A (en) * 1987-09-29 1989-05-16 Saft, S.A. Activatable electrochemical battery implementing lithium/oxyhalide couples
DE10003740C1 (en) 2000-01-28 2001-06-13 Daimler Chrysler Ag Electric battery e.g. traction battery for electric or hybrid vehicle has cooling plate in thermal contact with cell connectors coupled between battery cell poles of series connected battery cells
FR2915626A1 (en) * 2007-04-24 2008-10-31 Batscap Sa MODULE FOR ELECTRIC ENERGY STORAGE ASSEMBLY
WO2009018941A1 (en) * 2007-08-06 2009-02-12 Daimler Ag Battery, particularly for a hybrid drive
DE102007063187B3 (en) * 2007-12-20 2009-04-02 Daimler Ag Battery with a cooling plate and method of manufacturing a battery
DE102008010808A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for temperature control of the battery and method for producing a Baterie
DE102008010839A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conduction
DE102008010837A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for tempering the battery
DE102008010838A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a battery housing and a heat-conducting plate for tempering the battery
EP2104121A1 (en) * 2007-02-16 2009-09-23 Panasonic Corporation Electric storage unit
DE102008034868A1 (en) * 2008-07-26 2010-01-28 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for tempering the battery
DE102008034876A1 (en) * 2008-07-26 2010-01-28 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for temperature control of the battery and method for producing a battery
EP2154740A2 (en) * 2005-05-12 2010-02-17 Tesla Motors, inc. Method and apparatus for mounting, cooling, connecting and protecting batteries
WO2010031856A2 (en) * 2008-09-18 2010-03-25 Magna Steyr Fahrzeugtechnik Ag & Co Kg Connecting board

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830936A (en) * 1987-09-29 1989-05-16 Saft, S.A. Activatable electrochemical battery implementing lithium/oxyhalide couples
DE10003740C1 (en) 2000-01-28 2001-06-13 Daimler Chrysler Ag Electric battery e.g. traction battery for electric or hybrid vehicle has cooling plate in thermal contact with cell connectors coupled between battery cell poles of series connected battery cells
EP2154740A2 (en) * 2005-05-12 2010-02-17 Tesla Motors, inc. Method and apparatus for mounting, cooling, connecting and protecting batteries
EP2104121A1 (en) * 2007-02-16 2009-09-23 Panasonic Corporation Electric storage unit
FR2915626A1 (en) * 2007-04-24 2008-10-31 Batscap Sa MODULE FOR ELECTRIC ENERGY STORAGE ASSEMBLY
WO2009018941A1 (en) * 2007-08-06 2009-02-12 Daimler Ag Battery, particularly for a hybrid drive
DE102007063187B3 (en) * 2007-12-20 2009-04-02 Daimler Ag Battery with a cooling plate and method of manufacturing a battery
DE102008010839A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conduction
DE102008010837A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for tempering the battery
DE102008010838A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a battery housing and a heat-conducting plate for tempering the battery
DE102008010808A1 (en) * 2008-02-23 2009-08-27 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for temperature control of the battery and method for producing a Baterie
DE102008034868A1 (en) * 2008-07-26 2010-01-28 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for tempering the battery
DE102008034876A1 (en) * 2008-07-26 2010-01-28 Daimler Ag Battery with a arranged in a battery housing heat conducting plate for temperature control of the battery and method for producing a battery
WO2010031856A2 (en) * 2008-09-18 2010-03-25 Magna Steyr Fahrzeugtechnik Ag & Co Kg Connecting board

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832226A (en) * 2018-06-12 2018-11-16 芜湖爱丽机电科技有限公司 A kind of power battery cooling device for new-energy automobile

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FR2964799B1 (en) 2013-04-05

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