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
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
• • 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
  • H01M50/30—Arrangements for facilitating escape of gases
  • H01M50/317—Re-sealable arrangements
  • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
  • H01M50/333—Spring-loaded vent valves
• • 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 having a plurality of
• Battery modules comprising a plurality of battery cells.
• the battery further includes a degassing system having a degassing line with openings. The openings connect the battery modules
• the invention relates to a motor vehicle with the battery according to the invention.
• FIG. 1 shows how a plurality of battery cells 10 can be combined to form a battery module 12 and subsequently a plurality of battery modules 12 to form a battery 14. This is done by a parallel or not shown
• the electrical voltage of a battery 14 is for example between 12 and 750 volts DC.
• Lithium-ion battery cells have at least one positive and one negative electrode (cathode or anode), the lithium-ion (Li +) reversible on (intercalation) or outsource
• a battery cell is made up of electrochemical elements that are sensitive to external influences such as air or moisture and therefore need to be protected as much as possible. Should a malfunction nevertheless occur (eg as a result of an accident or overcharging), an inadmissible gas formation may occur. With it one
• a safety opening 1 1 is arranged in the battery cell housing, for example in its lid - visible in Figure 1. At an increased internal pressure of the battery cell, the safety opening opens and the battery cell can degas.
• Degassing degassed in a degassing system which collects the escaping degassing and selectively dissipates. This degassing system is connected to all battery cells.
• DE 10 2009 046 385 A1 describes a degassing system of a battery, wherein the battery cells comprise on their undersides outlet openings for battery gas and electrolyte. At an overpressure inside the battery cells, the battery gases and electrolytes are discharged into a reservoir below the battery cells.
• the reservoir is connected via a fitting, which may for example be a check valve connected to the environment. The check valve prevents z. B. penetration of moisture of the ambient air into the battery. Disclosure of the invention
• a battery is provided with a plurality of battery modules, which comprise a plurality of battery cells.
• the battery further comprises a degassing system, which has a degassing line with
• the openings connect the battery modules
• a blocking element is operatively connected to each opening in such a way that the openings in the degassing line are permeable, but the openings in
• the invention is based on the finding to provide a blocking element at the module level in order to prevent the entry of degassing products into uninvolved ones
• degassing products can essentially be a gas emerging from the battery cell and / or
• Electrolyte can be understood.
• the fluidic connection of the battery modules with the degassing line and thus the connection of the battery cells with the degassing line is designed to be permeable only in the direction of the battery module or the battery cells starting in the degassing.
• battery cells within a battery module as known from the prior art, can degas into the degassing line.
• the degassing products in the degassing line can no longer contribute to other, not involved in the degassing,
• the battery modules are fluidically through openings in the
• the blocking elements have a functionality which allows the degassing products of the battery cells to pass through the opening into the degassing line. simultaneously however, the degassing are prevented by the blocking element, proceed from the degassing via the openings to other, uninvolved in the degassing, battery modules and their battery cells.
• the blocking element should be designed already at low
• the blocking module should be designed, even at high pressures within the degassing, a flow of degassing through the opening of the
• Such a blocking element can be realized by various components.
• the blocking element is designed, for example, as a reversibly opening blocking element.
• a reversibly opening blocking element designates a blocking element which is designed, after the first passage of
• Reversible opening blocking elements are in particular
• a check valve is a component that allows the flow of a fluid in only one direction. Such a check valve may preferably be a beak valve or a spring-loaded check valve.
• the blocking element is an irreversibly opening
• An irreversibly opening blocking element denotes a
• Blocking element which after the first passage of
• the irreversibly opening barrier element is a membrane or rupture disk.
• the irreversibly opening blocking elements also have a different resistance with respect to the
• the blocking element should be at least several days against corrosive
• Characteristics of be discharged from the battery cells degassing be functionally resistant. Stay the blocking elements despite influence of
• Degassing products at least several days functional consists in the Usually enough time to repair the damage before further
• the blocking element is functionally resistant to corrosive properties of degassing products which can be discharged from the battery cells.
• the check valves of not involved in the degassing battery modules must not be renewed or repaired.
• a blocking element per battery module is provided.
• a battery module preferably comprises more than two battery cells, furthermore preferably more than five battery cells, in particular preferably six battery cells.
• a battery preferably comprises more than two battery modules, furthermore preferably more than five battery modules.
• the battery cells comprise safety openings through which the battery cells can degas.
• the safety openings are preferably arranged on the side of the battery cells facing the poles. This is usually the top of the battery cells when installed, whereby the degassing of the electrolyte content in the degassing is relatively low.
• Battery module a collector for collecting ventable from the battery cells degassing.
• the collector is used to collect degassing products, which emerge from the safety openings of the battery cells.
• the collector is fluidically, for example via a
• the collector is integrated in a module housing cover.
• the module housing cover and the collector are one and the same component, whereby components can be saved and can be omitted in the production assembly steps.
• the module housing cover and the collector are one and the same component, whereby components can be saved and can be omitted in the production assembly steps.
• Hoses wherein the openings are formed by the terminals.
• the degassing line may comprise a section which is realized by pieces of hose and alternately interposed T-ports.
• a branch of the T-connections leads to a battery module and connects it to the degassing line. In this branch can
• the blocking element for example, be arranged the blocking element.
• the battery is a lithium-ion battery comprising a plurality of lithium-ion battery cells (secondary cells).
• Lithium-ion battery cells are characterized by high energy and power densities, resulting in further advantages, especially in the field of electric traction.
• the battery is usually for feeding an electric
• a degassing system for a battery having a plurality of battery modules comprising a plurality of battery cells.
• the degassing system comprises a degassing line with openings, which are suitable, fluid modules with the battery modules
• Degassing line are permeable, but the openings in
• Figure 2 is a schematic partial view of a battery according to the invention
• Figure 3 is an interior view of a module housing cover comprising a
• Figure 4 is an exterior view of a module housing cover comprising a
• FIG. 1 has already been discussed to explain the state of the art.
• FIG. 2 shows a schematic partial view of a battery 14 according to the invention with a degassing system 15.
• the degassing system 15 forms a
• the degassing line 16 can, for example, via connections 24 in the form of T-connections with
• intermediate hoses 25 may be formed. In that arm of the
• T terminals which leads to a battery module 12 of the battery 14, a blocking element 26, for example, a check valve, may be arranged.
• Battery module housing 19 may be arranged and encapsulated from the outside world, wherein the battery module housing 19 via the terminal 24 with the
• Degassing line 16 is connected. Degassed one of the battery cells 10, so are their degassing, in
• Battery module housing 19 collected and passed through the blocking element 26 through the opening 17 in the degassing 16. Via the degassing line 16, the degassing products from the battery 14 and from their
• Degassing line 16 the degassing products are prevented by the blocking elements 26, to the battery cells 10 other, not degassing
• Battery module 12 is designed as the smallest unit to be replaced in the battery 14.
• the blocking element 26 should, at least for a certain time, for example several days, against the corrosive properties of the degassing of battery cells 10, z. As lithium-ion battery cells, be resistant. As a result, the remaining battery modules 12 remain protected until repair or replacement of the degassing battery module 12 and associated cleaning of the degassing system 15.
• the blocking element 26 can be reclosed, that is to say reversibly opening, or else designed to be irreversibly opening.
• the reversible opening is to say reversibly opening, or else designed to be irreversibly opening.
• Locking element 26 can be made of both flexible materials, eg. B. be executed in the form of a beak valve, or with a spring mechanism. Furthermore, the irreversibly opening blocking element 26 may be designed in the form of a membrane or rupture disk, in particular with different resistance with regard to the direction of the acting pressure (eggshell principle).
• the battery 14, or parallel connection of several battery cell strands of the affected strand, should not be used until replacement of the degassed battery cell 10 or the affected battery module 12 and a speedy repair is appropriate.
• Figure 3 shows the battery cells 10 facing inside a
• a collector 20 is integrated, which collects the escaping degassing of the battery cells 10 of the battery module 12.
• the collector 20 is arranged trough-shaped over the safety openings 1 1 of the battery cells 10.
• the collector 20 may also be framed by a groove 22, in which a seal can be inserted. The seal seals the transition between the collector 20 and the battery cells 10, so that the degassing products flowing from the safety openings 11 into the collector 20 can not contact the other areas of the battery cells 10, for example their poles.
• the degassing products are passed via the opening 17 from the collector 20 into the degassing line 16.
• FIG. 4 shows the outside of the already known from FIG. 4
• the terminal 24 is formed as a T-terminal, wherein a hose 25 can be connected to each of the two free ends of the T-terminal.
• Hoses 25 further connections 24 of other collectors 20 can be connected until all the collectors 20 of the degassing system 15 are connected to each other via the degassing line 16.
• a blocking element 26 is integrated in each port 24 of the collectors 20, a blocking element 26 is integrated. Now degas one or more battery cells 10, a battery module 12, the escaping

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Gas Exhaust Devices For Batteries (AREA)
• Battery Mounting, Suspending (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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ID=47071279

Family Applications (1)

Country Status (3)

Cited By (5)

Families Citing this family (9)

Citations (9)

• 2012
  • 2012-01-23 DE DE102012200869A patent/DE102012200869A1/de not_active Withdrawn
  • 2012-10-23 CN CN201280067702.0A patent/CN104126237A/zh active Pending
  • 2012-10-23 WO PCT/EP2012/070954 patent/WO2013110359A1/de active Application Filing

Patent Citations (9)

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