WO2018151430A1 - Module de batterie comprenant une pompe électroosmotique - Google Patents

Module de batterie comprenant une pompe électroosmotique Download PDF

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Publication number
WO2018151430A1
WO2018151430A1 PCT/KR2018/001015 KR2018001015W WO2018151430A1 WO 2018151430 A1 WO2018151430 A1 WO 2018151430A1 KR 2018001015 W KR2018001015 W KR 2018001015W WO 2018151430 A1 WO2018151430 A1 WO 2018151430A1
Authority
WO
WIPO (PCT)
Prior art keywords
compartment
battery module
battery
bottom plate
pump
Prior art date
Application number
PCT/KR2018/001015
Other languages
English (en)
Korean (ko)
Inventor
고루브코브안드레
Original Assignee
삼성에스디아이 주식회사
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
Priority claimed from EP17156803.3A external-priority patent/EP3364492B1/fr
Application filed by 삼성에스디아이 주식회사 filed Critical 삼성에스디아이 주식회사
Publication of WO2018151430A1 publication Critical patent/WO2018151430A1/fr

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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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/56—Electro-osmotic dewatering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/04—Pumps for special use
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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 module, and more particularly, to a battery module including at least one compartment for accommodating a battery cell as a configuration of the battery module.
  • Rechargeable or secondary batteries differ from primary batteries in that charging and discharging can be repeated, the latter providing only an irreversible conversion of chemicals into electrical energy.
  • Low-capacity rechargeable batteries can be used as power sources for small electronic devices such as mobile phones, laptops, computers, and camcorders, while large-capacity rechargeable batteries can be used as power sources for hybrid vehicles.
  • the secondary battery may include an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, a case accommodating the electrode assembly, and an electrode terminal electrically connected to the electrode assembly.
  • the electrolyte is injected into the case to enable charge and discharge of the battery by the electrochemical reaction of the positive electrode, the negative electrode and the electrolyte.
  • the shape of the case which may be, for example, cylindrical or rectangular, may vary depending on the use of the battery.
  • the rechargeable battery may be used in the form of a battery module composed of a plurality of unit battery cells coupled in series or in parallel to provide a high energy density, for example, for driving of a hybrid vehicle.
  • the battery module may implement a high-power rechargeable battery such as for an electric vehicle by interconnecting a plurality of unit battery cells according to the amount of power required.
  • the battery module may be configured in a block or modular form.
  • each battery may be coupled to a common current collector and a common battery management system and have a housing.
  • a plurality of battery cells are connected to form a sub module, and the plurality of sub modules are connected to form any one module.
  • the battery management function may be implemented at least partially at the module or submodule level, thereby improving compatibility.
  • One or more battery modules may be mechanically and electrically integrated, equipped with a thermal management system, and provided to be connected with one or more electrical consumer devices to form a battery system.
  • the battery module may be provided with a closed compartment or housing to receive at least a portion of the battery module and to protect it from environmental influences. If water is present, corrosion of the battery components must be prevented and damage to the electrical or electronic components of the battery module must be prevented.
  • the electrical or electronic components of the battery module have a temperature cycle due to the diffusion of high temperature.
  • gas exchange with the atmosphere should be made to avoid high pressure fluctuations inside the compartment.
  • Humid air may enter the components of the battery module during the gas exchange.
  • moisture inside the compartment may be condensed, and the condensed water promotes corrosion of electronic components inside the compartment.
  • the large compartment for the secondary battery module makes the situation worse.
  • the large surfaces of these compartments are difficult to withstand the pressure fluctuations of the gas in the temperature cycling situation. Therefore, the compartment needs to be provided with a pressure compensation opening toward the atmosphere.
  • Humid air can be exchanged through the pressure compensation openings while most of the cells are used and heated and cooled. Water condensed inside the cell compartment not only accelerates corrosion, but also reduces insulation resistance with regard to safety, and in the worst case can lead to internal short cuts in high voltage cells.
  • Controlling the humidity inside the cell compartment is difficult in terms of cost effectiveness. Water may be prevented from entering the compartment by the filter provided in the pressure compensation opening, but it is possible to prevent the inflow of water from the gaseous state through the filter. .
  • plastic materials commonly used in the automotive field such as polyamides PA6 and PA66, allow for some moisture migration or diffusion. Therefore, in the long term, when the partial pressure difference of moisture between the inside and the outside is large, moisture may flow into the compartment through the walls of the compartment.
  • the housing or compartment Since the housing or compartment has no water present for the entire life of the vehicle (more than 10 years), it is easy to cause a diffusion effect due to the partial pressure difference of water, and even a small water diffusion that does not lead to condensation of water has a long-term adverse effect. .
  • Embodiments of the present invention are to provide a battery system to ensure a long-term dry state for the compartment of the battery module.
  • a battery module comprising at least one compartment for accommodating the components of the battery module, the compartment comprising an electroosmotic pump.
  • the battery module includes one or more housings for receiving the components of the battery system.
  • This housing is designed to prevent external mechanical deformation. Furthermore, these housings must protect the components of the cell contained from harmful environmental factors, particularly liquid water, which can cause the corrosion process.
  • One embodiment of the present invention is based on the fact that during operation of the secondary battery module, inflow of moisture due to specific conditions, in particular in automotive applications, is inevitable.
  • condensate may be present inside the housing or compartment and may corrode components such as electronic equipment for regulating or controlling the operation of the terminals of the battery cells and the battery modules.
  • the mechanical integrity of the compartment can be degraded due to the corrosion process by the liquid water.
  • one embodiment of the present invention greatly improves the dryness of the interior of the compartment by having an electropenetrating pump provided to discharge liquid water from the compartment to the outside.
  • Electropenetrating pumps can be easily provided, for example, on the walls of compartments.
  • the electroosmotic pump can be very small, light in weight and save installation space.
  • the amount of water that condenses for a short time, such as 1 day, is quite small.
  • the electropenetrating pump is advantageous for discharging this small amount, and the power consumption during operation is low.
  • the compartment surrounds the plurality of battery cells.
  • the electropenetrating pump may be integrally integrated with the bottom plate of the compartment. Thus, part of the pump can replace the bottom plate area of the compartment.
  • the electropenetrating pump may comprise a porous hydrophilic region integrally integrated into the bottom plate of the compartment. That is, there is no additional frame or support member for securing the porous hydrophilic region to the bottom plate. Therefore, the installation space and weight can be reduced.
  • the electroosmotic pump is integrated into the bottom plate of the compartment, the bottom plate has a surface structure on its inner surface, and the electroosmotic pump may be installed at the lowest point of the surface structure.
  • the bottom plate has a kind of pattern or ditch that allows condensate to flow to the collection point.
  • An electropenetrating pump is placed at the collection point. As a result, the time to remove the condensate out of the compartment can be shortened.
  • the cooling unit may be provided adjacent to the electroinfiltration pump.
  • the cooling section leads to condensation of water vapor in the electropenetrating pump.
  • the electroosmotic pump is integrated in the bottom plate and the bottom plate comprises a surface structure, it is preferred that the bottom plate is cooled. That is, the bottom plate can act as the cooling unit.
  • the battery module may itself constitute the voltage source of the electropenetrating pump. That is, there is no additional external voltage source for the pump operation, thereby reducing the manufacturing process and the total cost of the battery system.
  • a vehicle including the battery module is provided.
  • FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a compartment in a battery module according to an embodiment of the present invention.
  • a component when referred to as being 'connected' or 'connected' to another component, the component may be directly connected to or connected to the other component, but in between It will be understood that may exist.
  • a component when referred to as 'directly connected' or 'directly connected' to another component, it should be understood that there is no other component in between.
  • the term 'comprises' or 'having' is only intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more. It is to be understood that it does not exclude in advance the possibility of the presence or addition of other features, numbers, steps, actions, components, parts or combinations thereof.
  • 'and / or' includes any combination of the plurality of listed items or any of the plurality of listed items.
  • 'A or B' may include 'A', 'B', or 'both A and B'.
  • an embodiment of the battery module 100 includes a plurality of battery cells 10 arranged in one direction and a heat exchange member 110 adjacent to a bottom surface of the plurality of battery cells 10.
  • the pair of end plates 18 are provided to face the wide surface of the battery cell 10 at the outside of the battery cell 10, and the connection plate 19 connects the pair of end plates 18 to form a plurality of end plates 18. It is provided to fix the battery cells 10 together.
  • the fastening portions 18a at both sides of the battery module 100 are fastened to the bottom plate 31 by bolts 140.
  • the bottom plate 31 constitutes a part of the compartment 30.
  • each battery cell 10 may be a rectangular (or rectangular) cell, a plurality of cells are stacked together in a wide surface direction to form a battery module.
  • each battery cell 10 includes a battery case configured to receive an electrode assembly and an electrolyte. The battery case is sealed by a cap assembly 14.
  • the cap assembly 14 includes a positive terminal 11, a negative terminal 12, and a vent 13 having different polarities.
  • the vent 13 serves as a passage through which gas generated from the battery cell 10 is discharged to the outside of the battery cell 10.
  • the positive electrode terminal 11 and the negative electrode terminal 12 of the adjacent battery cell 10 may be electrically connected through the bus bar 15, and the bus bar 15 may be fixed by a nut 16 or the like. Therefore, the battery module 100 may be provided by electrically connecting the plurality of battery cells 10 in one bundle, and may be used as a power supply unit.
  • the battery cell 10 may generate a large amount of heat during charging and discharging. Therefore, the battery module 100 may further include a heat exchange member 110 provided adjacent to the bottom surface of the battery cell 10. An elastic member 120 made of an elastic material such as rubber may be interposed between the bottom plate 31 and the heat exchange member 110.
  • Compartment 30 of battery module 100 has a pressure compensation opening 40 to the atmosphere and a plurality of battery cells 10 are embedded.
  • the pressure compensation opening 10 may include a device such as a filter for preventing the inflow of liquid water.
  • Compartment 30 may be formed of a metal such as aluminum.
  • An electropenetrating pump (EOP) 50 is provided which is integrated into the lower side of the compartment 30, more precisely, the bottom plate 31. EOP is based on the electropenetrating effect of uncharged liquid moving against a surface charged by an externally applied electric field.
  • the electropenetrating effect is a phenomenon on the contact surface of a solid and a liquid. Applying an electric field across the porous dielectric material causes liquid to flow across the dielectric material.
  • EOP has some outstanding features. EOP can produce a constant, pulse-free flow, and the size and direction of the flow in the EOP is easy to control. Electropenetration requires a charged solid surface to create an electroinfiltration flow (EOF).
  • EEF electroinfiltration flow
  • silica surface in contact with an aqueous solution is charged due to the deprotonation of silanol groups on the surface.
  • the charged surface attracts counter ions and repels coin ions, resulting in an electrical double layer (EDL).
  • EDL electrical double layer
  • EOP A fluid propulsion device based on EOF is called EOP.
  • EOP can be operated under a direct current (DC) electric field, and the material used to make the EOF is an open channel or a porous material.
  • the EOP 50 comprises a porous hydrophilic region 52 embedded in a portion of the compartment 30, preferably the bottom plate of the compartment 30 ( 31) is integrated.
  • the porous material may be made of a silica-based material or the like based on sintered glass.
  • the bottom plate 31 has a surface structure 32 for collecting water on the inner side, and can provide the collected water to the EOP 50 side.
  • surface structure 32 may be comprised of slopes, ditches, and the like that allow water to flow toward EOP 50.
  • the water may be condensed water inside the compartment or water introduced into the compartment from the outside.
  • the EOP 50 will be provided at the lowest point of the surface structure 32.
  • Electrodes 54 and 56 are positioned above and below the porous hydrophilic region 52, respectively. Electrodes 54 and 56 are connected to voltage source 60 and create an electric field in the porous hydrophilic region 52. The electrodes 54 and 56 are perforated to allow water vapor to condense (evaporate) on the surface of the porous hydrophilic region 52. The electrodes 54 and 56 may have a corrosion resistant coating.
  • the battery cell 10 provided inside the compartment 30 as a voltage source for the electrodes 54, 56.
  • a cooling unit (not shown) may be provided around the inner surface of the porous hydrophilic region 52. Accordingly, the temperature of the inner side surface may be lower than that of other components inside the compartment 30. As a result, the condensation of water vapor on the surface is promoted.
  • connection plate 30 compartment
  • 60 power supply unit 100: battery module

Abstract

La présente invention concerne un module de batterie. Un module de batterie selon un mode de réalisation de la présente invention comprend au moins un compartiment pour contenir un élément constitutif d'une cellule de batterie, et le compartiment comprend une pompe électroosmotique.
PCT/KR2018/001015 2017-02-20 2018-01-23 Module de batterie comprenant une pompe électroosmotique WO2018151430A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP17156803.3 2017-02-20
EP17156803.3A EP3364492B1 (fr) 2017-02-20 2017-02-20 Module de batterie comprenant une pompe électro-osmotique
KR1020180007846A KR102308655B1 (ko) 2017-02-20 2018-01-22 전기침투 펌프를 포함하는 전지 모듈
KR10-2018-0007846 2018-01-22

Publications (1)

Publication Number Publication Date
WO2018151430A1 true WO2018151430A1 (fr) 2018-08-23

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Application Number Title Priority Date Filing Date
PCT/KR2018/001015 WO2018151430A1 (fr) 2017-02-20 2018-01-23 Module de batterie comprenant une pompe électroosmotique

Country Status (1)

Country Link
WO (1) WO2018151430A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040074768A1 (en) * 2002-10-18 2004-04-22 Anex Deon S. Electrokinetic pump having capacitive electrodes
US7149085B2 (en) * 2004-08-26 2006-12-12 Intel Corporation Electroosmotic pump apparatus that generates low amount of hydrogen gas
KR20070065871A (ko) * 2004-08-04 2007-06-25 더 보드 오브 트러스티스 오브 더 리랜드 스탠포드 주니어 유니버시티 전기삼투펌프가 달린 연료전지
KR20070097337A (ko) * 2006-03-28 2007-10-04 가시오게산키 가부시키가이샤 접속구조체, 유로제어부, 연료전지형 발전장치 및 전자기기
US20160233482A1 (en) * 2013-09-18 2016-08-11 Robert Bosch Gmbh Device and method for removing moisture from a battery housing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040074768A1 (en) * 2002-10-18 2004-04-22 Anex Deon S. Electrokinetic pump having capacitive electrodes
KR20070065871A (ko) * 2004-08-04 2007-06-25 더 보드 오브 트러스티스 오브 더 리랜드 스탠포드 주니어 유니버시티 전기삼투펌프가 달린 연료전지
US7149085B2 (en) * 2004-08-26 2006-12-12 Intel Corporation Electroosmotic pump apparatus that generates low amount of hydrogen gas
KR20070097337A (ko) * 2006-03-28 2007-10-04 가시오게산키 가부시키가이샤 접속구조체, 유로제어부, 연료전지형 발전장치 및 전자기기
US20160233482A1 (en) * 2013-09-18 2016-08-11 Robert Bosch Gmbh Device and method for removing moisture from a battery housing

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