WO2021058883A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2021058883A1
WO2021058883A1 PCT/FR2020/051328 FR2020051328W WO2021058883A1 WO 2021058883 A1 WO2021058883 A1 WO 2021058883A1 FR 2020051328 W FR2020051328 W FR 2020051328W WO 2021058883 A1 WO2021058883 A1 WO 2021058883A1
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WO
WIPO (PCT)
Prior art keywords
compartment
battery unit
battery
partition wall
module
Prior art date
Application number
PCT/FR2020/051328
Other languages
French (fr)
Inventor
Abdelillah EL HABCHI
Jeremy MOIGNARD
Cyrille NEYER
Original Assignee
Psa 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 Psa Automobiles Sa filed Critical Psa Automobiles Sa
Priority to EP20757626.5A priority Critical patent/EP4035222A1/en
Priority to CN202080066470.1A priority patent/CN114430868A/en
Publication of WO2021058883A1 publication Critical patent/WO2021058883A1/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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/62—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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack for a hybrid or electric vehicle comprising electrochemical cells for the production, storage and release of electrical energy.
  • the invention relates to a battery pack protected in particular against the risk of fire of electrical origin.
  • Battery pack is understood to mean an assembly comprising a tray generally containing a mounting interface, connection terminals and at least one battery module containing at least one electrochemical cell and possibly electrical or electronic means for the management of electrical energy from the battery pack.
  • the invention applies mainly to the field of motor vehicles, in particular electric vehicles (EV), hybrid electric vehicles (HEV) and rechargeable hybrid electric vehicles (PHEV).
  • EV electric vehicles
  • HEV hybrid electric vehicles
  • PHEV rechargeable hybrid electric vehicles
  • the traction batteries of an electric vehicle or a hybrid electric vehicle are generally cells or electrochemical batteries of the lithium-ion type and during the discharge and charge phases various chemical and electrochemical reactions occur, which are generally of an exothermic nature, thus generating heat accumulating inside the battery.
  • the temperature levels permitted by the battery require thermal control needs. It is therefore necessary to effectively cool the battery in order to maintain its level of performance and also to limit its aging.
  • the presence of water in the battery pack and more generally of a conductive liquid can cause short circuits within an electrochemical cell module.
  • a liquid can come from, among other things, a leakage fault in the battery pack, condensation or an internal leak in the water cooling system of the battery pack. Therefore, the hot spot and its spread are very likely.
  • a battery unit comprising a casing defining an interior volume, the casing comprising a bottom in which a portion for retaining a liquid conductor is formed, the interior volume comprising an electrical interconnection means electrically isolated from the casing as well as a zone of said electrical interconnection means located at a predetermined altitude h with respect to the retention bottom, said zone being the only zone of said means electrical interconnection having electrical contact with said conductive liquid when said conductive liquid is present at the predetermined altitude.
  • an electrical interconnection means electrically isolated from the casing as well as a zone of said electrical interconnection means located at a predetermined altitude h with respect to the retention bottom, said zone being the only zone of said means electrical interconnection having electrical contact with said conductive liquid when said conductive liquid is present at the predetermined altitude.
  • the object of the present invention is therefore to overcome these drawbacks by providing a battery pack which makes it possible to limit or even eliminate the risks of short-circuit.
  • the invention relates to a battery pack comprising
  • the module being housed in the internal volume of the tank characterized in that the tank comprises a partition wall delimiting in the interior volume, a module receiving compartment and a collection compartment, the separation wall having at least one opening allowing the passage of a fluid from the reception compartment to the collection compartment.
  • the tray of the battery unit has a compartment in which the fluid which would be present in the receiving compartment where the battery module is located can be collected to prevent this fluid from remaining near the battery module.
  • the partition wall extends parallel to the bottom wall of the tank, thus forming a double bottom, the collection compartment being provided between the bottom wall and the double bottom, below the receiving compartment.
  • This double bottom has one or more openings making it possible to collect a fluid such as water from the upper volume of the tank corresponding to the receiving compartment for the battery modules, to the lower volume of the tank corresponding to the collection compartment.
  • the collection takes place through the opening (s) made in the separation wall by flow by gravity towards the lower volume serving as a collection compartment.
  • this prevents fluid such as water from remaining in contact with the battery modules.
  • the opening (s) made in the partition wall may respectively comprise means allowing the passage of a fluid only from the receiving compartment to the collecting compartment, such as check valves. returns. This advantageously avoids the rise of the fluid collected towards the receiving compartment.
  • the partition wall is a perforated plate, a grid.
  • the collection compartment height is chosen sufficient to avoid any risk of overflow, and represents between 1/4 and 1/3 of the height of the tray.
  • the bottom of the tank further comprises at least one purge orifice, equipped for example with a sealed bleed screw allowing operators in after-sales service to check the presence of water and the evacuation of this before opening the bins.
  • the tray of the battery unit is made of a suitable material such as plastic, aluminum, and has the shape of a box, preferably parallelepiped.
  • a suitable material such as plastic, aluminum, and has the shape of a box, preferably parallelepiped.
  • Such a container must in particular have mechanical characteristics enabling it to withstand shocks.
  • the battery unit is advantageously in a form which can be accommodated directly in a vehicle, the battery unit having all the electrical connection elements necessary for its operation in the vehicle as well as means for implantation and fixing of the unit in the vehicle.
  • the invention therefore makes it possible to provide a battery unit in which any risk of short-circuit linked to the presence of water is avoided and whose cooling is optimal while being economically advantageous.
  • the invention also relates to a motor vehicle, of the electric vehicle (EV), hybrid electric vehicle (HEV) or rechargeable hybrid electric vehicle (PHEV) type, characterized in that it comprises at least one battery pack as described. above.
  • a motor vehicle of the electric vehicle (EV), hybrid electric vehicle (HEV) or rechargeable hybrid electric vehicle (PHEV) type, characterized in that it comprises at least one battery pack as described. above.
  • FIG. 1 shows a sectional view of an example of a battery pack according to the invention.
  • the battery unit 1 comprises a casing 2 comprising several battery modules 3 respectively constituted by a set of electrochemical cells of the Li-ion type.
  • Means for cooling the battery unit are also provided and may contain a generally conductive cooling fluid such as water.
  • the casing 2 further comprises a partition wall 21 forming a double bottom and separating the internal volume of the casing 2 into a receiving compartment 22 for the battery modules 3 and a collecting compartment 23.
  • This partition wall has one or more openings 4 allowing the passage of a fluid from the receiving compartment 22 to the collection compartment 23, by gravity.
  • cooling water E passes through the openings 4 which is represented by arrows, to come and settle in the bottom of the collection compartment 23.
  • these openings 4 are provided with a non-return valve preventing the water E from rising to the receiving compartment 22.
  • the battery unit 1 also comprises a fuse relay box 5.
  • Such a battery unit has the advantage of using battery modules 3 which guarantee control of the heating occurring in the battery unit effectively thanks to the cooling means used and this, while controlling the risk of short -circuit and starting of fire thanks to the compartment of collection.
  • the battery unit according to the invention therefore makes it possible to control the risk of short-circuit and of fire while being economically viable, since it is simple to manufacture.

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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)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention relates to a battery pack (1) comprising a container (2) defining an inner space, at least one battery module (3) consisting of at least one ion lithium-type electrochemical cell and means for cooling the cell, the module (3) being housed in the inner space of the container (2). The invention is characterised in that the container (2) comprises a separating wall (21) defining, in the inner space, a compartment (22) for receiving the module (3) and a collecting compartment (23), the separating wall (21) having at least one opening (4) allowing a liquid to pass from the receiving compartment (22) to the collecting compartment (23).

Description

DESCRIPTION DESCRIPTION
TITRE DE L'INVENTION : BLOC DE BATTERIE TITLE OF THE INVENTION: BATTERY PACK
[0001] La présente invention revendique la priorité de la demande française 1910525 déposée le 24.09.2019 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. The present invention claims the priority of the French application 1910525 filed on 09.24.2019, the content of which (text, drawings and claims) is incorporated here by reference.
[0002] La présente invention concerne un bloc de batterie pour véhicule hybride ou électrique comprenant des cellules électrochimiques pour la production, le stockage et la libération d'énergie électrique. L'invention porte sur un bloc batterie protégé notamment contre les risques d'incendie d'origine électrique. The present invention relates to a battery pack for a hybrid or electric vehicle comprising electrochemical cells for the production, storage and release of electrical energy. The invention relates to a battery pack protected in particular against the risk of fire of electrical origin.
[0003] On comprend par bloc batterie, un ensemble comprenant un bac contenant généralement une interface de montage, des bornes de raccordement et au moins un module de batterie contenant au moins une cellule électrochimique et éventuellement des moyens électriques ou électroniques pour la gestion d'énergie électrique du bloc batterie. Battery pack is understood to mean an assembly comprising a tray generally containing a mounting interface, connection terminals and at least one battery module containing at least one electrochemical cell and possibly electrical or electronic means for the management of electrical energy from the battery pack.
[0004] L'invention s'applique principalement dans le domaine des véhicules automobiles, en particulier des véhicules électriques (EV), des véhicules électriques hybrides (HEV) et des véhicules électriques hybrides rechargeables (PHEV). The invention applies mainly to the field of motor vehicles, in particular electric vehicles (EV), hybrid electric vehicles (HEV) and rechargeable hybrid electric vehicles (PHEV).
[0005] Les batteries de traction d'un véhicule électrique ou d'un véhicule électrique hydride sont généralement des cellules ou batteries électrochimiques du type lithium-ion et lors des phases de décharge et charge diverses réactions chimiques et électrochimiques se produisent, qui sont globalement de nature exothermique, générant ainsi de la chaleur s'accumulant à l'intérieur de la batterie. Les niveaux de température admissibles par la batterie, nécessitent des besoins de contrôle thermique. Il est donc nécessaire de refroidir efficacement la batterie afin de maintenir son niveau de performance et de limiter également son vieillissement. The traction batteries of an electric vehicle or a hybrid electric vehicle are generally cells or electrochemical batteries of the lithium-ion type and during the discharge and charge phases various chemical and electrochemical reactions occur, which are generally of an exothermic nature, thus generating heat accumulating inside the battery. The temperature levels permitted by the battery require thermal control needs. It is therefore necessary to effectively cool the battery in order to maintain its level of performance and also to limit its aging.
[0006] La densité de puissance des batteries a tendance à augmenter afin de satisfaire aux besoins en termes d'autonomie et de charge rapide, générant encore plus de chaleur. Il a donc été proposé de refroidir la batterie par un liquide constitué généralement d'eau glycolée qui permet de satisfaire à ces besoins. Toutefois, l'eau étant un conducteur électrique, cette solution de refroidissement présente des inconvénients notamment en termes de sécurité, car en cas de choc il est impératif d'éviter tout risque de court-circuit. [0006] The power density of batteries tends to increase in order to meet the needs in terms of autonomy and fast charging, generating even more heat. It has therefore been proposed to cool the battery with a liquid generally consisting of glycol water which makes it possible to meet these needs. However, since water is an electrical conductor, this cooling solution has drawbacks, particularly in terms of safety, because in the event of an impact it is imperative to avoid any risk of short-circuit.
[0007] Dans ce domaine, les court-circuits électriques sont à l'origine de points chauds dont la propagation dans le bloc batterie peut entraîner un incendie du bloc batterie se propageant au véhicule. [0007] In this field, electrical short circuits are the cause of hot spots, the propagation of which in the battery pack can lead to a fire in the battery pack spreading to the vehicle.
[0008] La présence d'eau dans le bloc batterie et plus généralement d'un liquide conducteur peut provoquer des court-circuits au sein d'un module de cellules électrochimiques. Un tel liquide peut provenir entre autres d'un défaut d'étanchéité du bloc batterie, d'une condensation ou d'une fuite interne du système de refroidissement par eau du bloc batterie. Dès lors, le point chaud et sa propagation sont très probables. The presence of water in the battery pack and more generally of a conductive liquid can cause short circuits within an electrochemical cell module. Such a liquid can come from, among other things, a leakage fault in the battery pack, condensation or an internal leak in the water cooling system of the battery pack. Therefore, the hot spot and its spread are very likely.
[0009] Pour éviter les risques de court-circuits internes au bloc batterie, on a proposé dans FR 3 062 955 un bloc batterie comprenant un carter définissant un volume intérieur, le carter comprenant un fond dans lequel une partie de rétention d'un liquide conducteur est formée, le volume intérieur comprenant un moyen d'interconnexion électrique isolé électriquement du carter ainsi qu'une zone dudit moyen d'interconnexion électrique située à une altitude h prédéterminée par rapport au fond de rétention, ladite zone étant la seule zone dudit moyen d'interconnexion électrique ayant un contact électrique avec ledit liquide conducteur lorsque ce liquide conducteur est présent à l'altitude prédéterminée. [0010] Toutefois dans un tel bloc batterie reste le risque d'un emballement électrique si le niveau du liquide conducteur monte trop rapidement. To avoid the risks of internal short circuits to the battery pack, it has been proposed in FR 3,062,955 a battery unit comprising a casing defining an interior volume, the casing comprising a bottom in which a portion for retaining a liquid conductor is formed, the interior volume comprising an electrical interconnection means electrically isolated from the casing as well as a zone of said electrical interconnection means located at a predetermined altitude h with respect to the retention bottom, said zone being the only zone of said means electrical interconnection having electrical contact with said conductive liquid when said conductive liquid is present at the predetermined altitude. However, in such a battery unit there is still the risk of an electrical runaway if the level of the conductive liquid rises too quickly.
[0011] La présente invention a donc pour but de pallier ces inconvénients en proposant un bloc batterie qui permet de limiter voire éliminer les risques de court-circuit. The object of the present invention is therefore to overcome these drawbacks by providing a battery pack which makes it possible to limit or even eliminate the risks of short-circuit.
[0012] A cet effet, l'invention concerne un bloc batterie comprenantTo this end, the invention relates to a battery pack comprising
- un bac définissant un volume intérieur - a tray defining an interior volume
- au moins un module batterie constitué d'au moins une cellule électrochimique du type ion-lithium, et de moyens de refroidissement de ladite cellule, ledit module étant logé dans le volume intérieur du bac caractérisé en ce que le bac comporte une paroi de séparation délimitant dans le volume intérieur, un compartiment de réception du module et un compartiment de collecte, la paroi de séparation présentant au moins une ouverture permettant le passage d'un fluide du compartiment de réception vers le compartiment de collecte. - at least one battery module consisting of at least one electrochemical cell of the lithium-ion type, and means for cooling said cell, said module being housed in the internal volume of the tank characterized in that the tank comprises a partition wall delimiting in the interior volume, a module receiving compartment and a collection compartment, the separation wall having at least one opening allowing the passage of a fluid from the reception compartment to the collection compartment.
[0013] Ainsi, le bac du bloc batterie dispose d'un compartiment dans lequel du fluide qui serait présent dans le compartiment de réception où se trouve le module de batterie peut être collecté pour éviter que ce fluide ne reste à proximité du module de batterie. Thus, the tray of the battery unit has a compartment in which the fluid which would be present in the receiving compartment where the battery module is located can be collected to prevent this fluid from remaining near the battery module. .
[0014] Selon un mode de réalisation préféré de l'invention, la paroi de séparation s'étend parallèle à la paroi de fond du bac, formant ainsi un double fond, le compartiment de collecte étant ménagé entre la paroi de fond et le double fond, au-dessous du compartiment de réception. Ce double fond présente une ou plusieurs ouvertures permettant de collecter un fluide tel que de l'eau depuis le volume supérieur du bac correspondant au compartiment de réception pour les modules de batterie, vers le volume inférieur du bac correspondant au compartiment de collecte. La collecte s'effectue au travers de la ou des ouvertures ménagées dans la paroi de séparation par écoulement par gravité vers le volume inférieur servant de compartiment de collecte. De manière avantageuse, on évite ainsi que du fluide tel que de l'eau ne reste en contact avec les modules de batteries. According to a preferred embodiment of the invention, the partition wall extends parallel to the bottom wall of the tank, thus forming a double bottom, the collection compartment being provided between the bottom wall and the double bottom, below the receiving compartment. This double bottom has one or more openings making it possible to collect a fluid such as water from the upper volume of the tank corresponding to the receiving compartment for the battery modules, to the lower volume of the tank corresponding to the collection compartment. The collection takes place through the opening (s) made in the separation wall by flow by gravity towards the lower volume serving as a collection compartment. Advantageously, this prevents fluid such as water from remaining in contact with the battery modules.
[0015] Selon une forme de réalisation préférée, la ou les ouvertures ménagées dans la paroi de séparation peuvent comporter respectivement des moyens n'autorisant le passage d'un fluide que du compartiment de réception vers le compartiment de collecte tels que des clapets anti-retours. On évite ainsi avantageusement la remontée du fluide collecté vers le compartiment de réception. [0015] According to a preferred embodiment, the opening (s) made in the partition wall may respectively comprise means allowing the passage of a fluid only from the receiving compartment to the collecting compartment, such as check valves. returns. This advantageously avoids the rise of the fluid collected towards the receiving compartment.
[0016] Selon une forme de réalisation, la paroi de séparation est une plaque perforée, une grille. According to one embodiment, the partition wall is a perforated plate, a grid.
[0017] De préférence, la hauteur compartiment de collecte est choisie suffisante pour éviter tous risques de débordement, et représente entre 1/4 et 1/3 de la hauteur du bac. Preferably, the collection compartment height is chosen sufficient to avoid any risk of overflow, and represents between 1/4 and 1/3 of the height of the tray.
[0018] De préférence, le fond du bac comporte en outre au moins un orifice de purge, équipé par exemple d'une vis de purge étanche permettant, à des opérateurs en service après-vente de vérifier la présence d'eau et l'évacuation de celle-ci avant l'ouverture des bacs. Preferably, the bottom of the tank further comprises at least one purge orifice, equipped for example with a sealed bleed screw allowing operators in after-sales service to check the presence of water and the evacuation of this before opening the bins.
[0019] Selon un mode de réalisation préféré, le bac du bloc batterie est réalisé en une matière appropriée tel qu'une matière plastique, de l'aluminium, et présente une forme de boite, de préférence parallélépipédique. Un tel bac doit notamment présenter des caractéristiques mécaniques lui permettant de résister aux chocs. According to a preferred embodiment, the tray of the battery unit is made of a suitable material such as plastic, aluminum, and has the shape of a box, preferably parallelepiped. Such a container must in particular have mechanical characteristics enabling it to withstand shocks.
[0020] Le bloc batterie se présente avantageusement sous une forme directement logeable dans un véhicule, le bloc batterie présentant tous les éléments de raccordement électriques nécessaires à son fonctionnement dans le véhicule ainsi que des moyens d'implantation et fixation du bloc dans le véhicule. The battery unit is advantageously in a form which can be accommodated directly in a vehicle, the battery unit having all the electrical connection elements necessary for its operation in the vehicle as well as means for implantation and fixing of the unit in the vehicle.
[0021] L'invention permet donc de proposer un bloc batterie dans lequel tout risque de court-circuit lié à la présence d'eau est évité et dont le refroidissement est optimal tout en étant économiquement avantageux. The invention therefore makes it possible to provide a battery unit in which any risk of short-circuit linked to the presence of water is avoided and whose cooling is optimal while being economically advantageous.
[0022] L'invention concerne également un véhicule automobile, du type véhicule électrique (EV), véhicule électrique hybride (HEV) ou véhicule électrique hybride rechargeable (PHEV), caractérisé en ce qu'il comporte au moins un bloc batterie tel que décrit ci-dessus. The invention also relates to a motor vehicle, of the electric vehicle (EV), hybrid electric vehicle (HEV) or rechargeable hybrid electric vehicle (PHEV) type, characterized in that it comprises at least one battery pack as described. above.
[0023] On décrira maintenant l'invention plus en détails en référence au dessin dans lequel la : The invention will now be described in more detail with reference to the drawing in which the:
[0024] [Fig. 1] représente une vue en coupe d'un exemple de bloc batterie selon l'invention. [0024] [Fig. 1] shows a sectional view of an example of a battery pack according to the invention.
[0025] Le bloc batterie 1 selon l'invention comprend un carter 2 comportant plusieurs modules de batterie 3 constitués respectivement d'un ensemble de cellules électrochimiques du type Li-ion. The battery unit 1 according to the invention comprises a casing 2 comprising several battery modules 3 respectively constituted by a set of electrochemical cells of the Li-ion type.
[0026] Des moyens de refroidissement du bloc batterie sont également prévus et peuvent contenir un fluide de refroidissement généralement conducteur tel que de l'eau. [0026] Means for cooling the battery unit are also provided and may contain a generally conductive cooling fluid such as water.
[0027] La carter 2 comporte en outre une paroi de séparation 21 formant un double fond et séparant le volume intérieur du carter 2 en un compartiment de réception 22 pour les modules de batterie 3 et un compartiment de collecte 23. The casing 2 further comprises a partition wall 21 forming a double bottom and separating the internal volume of the casing 2 into a receiving compartment 22 for the battery modules 3 and a collecting compartment 23.
[0028] Cette paroi de séparation présente une ou plusieurs ouvertures 4 permettant le passage d'un fluide depuis le compartiment de réception 22 vers le compartiment de collecte 23, par gravité. This partition wall has one or more openings 4 allowing the passage of a fluid from the receiving compartment 22 to the collection compartment 23, by gravity.
[0029] Ainsi, si de l'eau de refroidissement E se trouve dans le compartiment de réception 22, elle passe au travers des ouvertures 4 ce qui est représenté par des flèches, pour venir se déposer dans le fond du compartiment de collecte 23. [0030] De préférence, ces ouvertures 4 sont pourvues d'un clapet anti-retour prévenant la remontée de l'eau E vers le compartiment de réception 22. Thus, if the cooling water E is in the receiving compartment 22, it passes through the openings 4 which is represented by arrows, to come and settle in the bottom of the collection compartment 23. Preferably, these openings 4 are provided with a non-return valve preventing the water E from rising to the receiving compartment 22.
[0031] Le bloc batterie 1 comporte également un boîtier de relais fusibles 5. The battery unit 1 also comprises a fuse relay box 5.
[0032] Un tel bloc batterie présente l'avantage d'utiliser des modules batterie 3 qui garantissent une maîtrise des échauffements survenant dans le bloc batterie de manière efficace grâce aux moyens de refroidissement mis en œuvre et ce, tout en maîtrisant le risque de court-circuit et de départ de feu grâce au compartiment de collecte. Le bloc batterie selon l'invention permet donc de maîtriser le risque de court-circuit et d'incendie tout en étant économiquement viable, car de fabrication simple. Such a battery unit has the advantage of using battery modules 3 which guarantee control of the heating occurring in the battery unit effectively thanks to the cooling means used and this, while controlling the risk of short -circuit and starting of fire thanks to the compartment of collection. The battery unit according to the invention therefore makes it possible to control the risk of short-circuit and of fire while being economically viable, since it is simple to manufacture.

Claims

REVENDICATIONS
[Revendication 1] bloc batterie (1) comprenant [Claim 1] battery pack (1) comprising
- un bac (2) définissant un volume intérieur - a container (2) defining an internal volume
- au moins un module batterie (3) constitué d'au moins une cellule électrochimique du type ion-lithium, et de moyens de refroidissement de ladite cellule, ledit module (3) étant logé dans le volume intérieur du bac (2), caractérisé en ce que le bac (2) comporte une paroi de séparation- at least one battery module (3) consisting of at least one electrochemical cell of the lithium-ion type, and means for cooling said cell, said module (3) being housed in the internal volume of the tank (2), characterized in that the container (2) has a dividing wall
(21) délimitant dans le volume intérieur, un compartiment de réception (22) du module (3) et un compartiment de collecte (23), la paroi de séparation (21) présentant au moins une ouverture (4) permettant le passage d'un fluide du compartiment de réception(21) delimiting in the interior volume, a receiving compartment (22) of the module (3) and a collection compartment (23), the partition wall (21) having at least one opening (4) allowing the passage of a fluid from the receiving compartment
(22) vers le compartiment de collecte (23). (22) to the collection compartment (23).
[Revendication 2] Bloc batterie (1) selon la revendication 1, caractérisé en ce que la paroi de séparation (21) s'étend parallèle à la paroi de fond (24) du bac (2), formant ainsi un double fond, le compartiment de collecte (23) étant ménagé entre la paroi de fond (24) et le double fond (21), au-dessous du compartiment de réception (22). [Claim 2] Battery unit (1) according to claim 1, characterized in that the partition wall (21) extends parallel to the bottom wall (24) of the tank (2), thus forming a double bottom, the collection compartment (23) being provided between the bottom wall (24) and the double bottom (21), below the reception compartment (22).
[Revendication 3] Bloc batterie selon la revendication 1 ou 2, caractérisé en ce que la ou les ouvertures (4) ménagées dans la paroi de séparation (21) comportent respectivement des moyens n'autorisant le passage d'un fluide que du compartiment de réception (22) vers le compartiment de collecte (23). [Revendication 4] Bloc batterie (1) selon la revendication 3, caractérisé en ce que lesdits moyens sont constitués de clapets anti-retours. [Claim 3] Battery unit according to claim 1 or 2, characterized in that the opening (s) (4) formed in the partition wall (21) respectively comprise means allowing the passage of a fluid only from the compartment. reception (22) to the collection compartment (23). [Claim 4] Battery unit (1) according to claim 3, characterized in that said means consist of non-return valves.
[Revendication 5] Bloc batterie (1) selon l'une des revendications 1 à 4, caractérisé en ce que le fond (24) du bac (2) comporte au moins un orifice de purge, notamment équipé d'une vis de purge étanche. [Claim 5] Battery unit (1) according to one of claims 1 to 4, characterized in that the bottom (24) of the tank (2) comprises at minus one bleed port, in particular fitted with a sealed bleed screw.
[Revendication 6] Bloc batterie (1) selon l'une des revendications 1 à 5, caractérisé en ce que la paroi de séparation (21) est une plaque perforée une grille. [Claim 6] Battery unit (1) according to one of claims 1 to 5, characterized in that the partition wall (21) is a perforated plate a grid.
[Revendication 7] Bloc batterie (1) selon l'une des revendications 1 à 3, caractérisé en ce que la paroi de séparation (21) est une grille. [Claim 7] Battery unit (1) according to one of claims 1 to 3, characterized in that the partition wall (21) is a grid.
[Revendication 8] Véhicule automobile, du type véhicule électrique (EV), véhicule électrique hybride (HEV) ou véhicule électrique hybride rechargeable (PHEV), caractérisé en ce qu'il comporte au moins un bloc batterie (1) selon l'une des revendications 1 à 5. [Claim 8] Motor vehicle, of the electric vehicle (EV), hybrid electric vehicle (HEV) or plug-in hybrid electric vehicle (PHEV) type, characterized in that it comprises at least one battery unit (1) according to one of claims 1 to 5.
PCT/FR2020/051328 2019-09-24 2020-07-22 Battery pack WO2021058883A1 (en)

Priority Applications (2)

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EP20757626.5A EP4035222A1 (en) 2019-09-24 2020-07-22 Battery pack
CN202080066470.1A CN114430868A (en) 2019-09-24 2020-07-22 Battery module

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR1910525 2019-09-24
FR1910525A FR3101201B1 (en) 2019-09-24 2019-09-24 BATTERY PACK

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EP4035222A1 (en) 2022-08-03
CN114430868A (en) 2022-05-03
FR3101201B1 (en) 2023-07-14
FR3101201A1 (en) 2021-03-26

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