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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/172—Arrangements of electric connectors penetrating the casing
  • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
  • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
  • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
  • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
  • B60L3/04—Cutting off the power supply under fault conditions
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L50/00—Electric propulsion with power supplied within the vehicle
  • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
  • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
  • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
  • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
  • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
  • B60L58/15—Preventing overcharging
• • 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
  • H01M10/04—Construction or manufacture in general
  • H01M10/0431—Cells with wound or folded electrodes
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/155—Lids or covers characterised by the material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
  • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
• • 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
  • H01M50/543—Terminals
  • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
  • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
• • 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
  • H01M50/543—Terminals
  • H01M50/552—Terminals characterised by their shape
  • H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
  • H01M50/50—Current conducting connections for cells or batteries
  • H01M50/543—Terminals
  • H01M50/564—Terminals characterised by their manufacturing process
• • 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
  • H01M50/574—Devices or arrangements for the interruption of current
  • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
• • 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
  • H01M2200/10—Temperature sensitive devices
  • H01M2200/103—Fuse
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/147—Lids or covers
  • H01M50/148—Lids or covers characterised by their shape
  • H01M50/15—Lids or covers characterised by their shape 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
• • 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
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

• Cap assembly for a battery cell having electronic safety functionality
• the disclosure relates to a cap assembly having electronic safety functionality to prevent an overcharge state of a battery cell.
• the charging state of a battery cell is an essential
• a low charging state of the battery cell may cause a malfunction of the electric motor or may at least be responsible for the electric motor not reaching the maximum possible performance.
• overcharging of a battery cell leads to a release of gases inside the battery cell and to the outside atmosphere as well as to a rise in battery temperature so that the battery cell can be damaged.
• the battery cell before being used, the battery cell usually has to pass an overcharge homologation test (GB/T) .
• G/T overcharge homologation test
• Mechanical devices which will be activated by cell internal gas pressure may be used to detect an overcharge state of the battery.
• Those mechanical devices are provided in a cap assembly of the battery cell. They may comprises a movable membrane which is sensitive to the cell internal gas
• the rise of the cell internal gas pressure effects a movement of the membrane to cause a short-circuit between positive and negative terminals of the battery.
• the high current flow caused due to the short-circuit of the battery poles can be detected and used to interrupt an electrical connection between internal electrodes of the battery cell and external terminals.
• An embodiment of a cap assembly for a battery cell having electronic safety functionality to detect and prevent an overcharge state of the battery cell is specified in claim 1.
• the cap assembly comprises a cap plate being electro- conductive, a first terminal to be coupled to a first
• the first terminal has a first voltage potential, when the first
• the second terminal has a second voltage potential, when the second terminal is coupled to the second electrode of the battery cell.
• the cap assembly further comprises an electrical device having a variable electrical conductivity.
• the first terminal is coupled to the cap plate by the electrical device.
• the second terminal is electro-conductively connected to the cap 5 plate.
• the electrical device is configured such that an
• the assembly may be configured to passively monitor the voltage of the battery cell, for example the voltage between the positive terminal and the negative terminal of the battery cell.
• the first terminal is electrically coupled to the cap5 plate.
• electrically coupled means that the
• the first terminal may be low resistively connected to the cap plate.
• the cap assembly comprises a connection plate being arranged above the cap plate and being electro-conductively connected to the first terminal.
• the electrical device is arranged 10 between the connection plate and the cap plate.
• the first terminal comprises a contacting portion to contact the battery cell and a connecting portion to contact the connection plate.
• the electrical/electronic device gets activated, i.e. is 5 operated, in a low resistive/highly conductive state, when it is detected by the electrical/electronic device that the voltage of the battery cell exceeds a certain voltage
• the electrical/electronic device will change a previous high resistive or insulating0 state to a highly conductive/low resistive state.
• the cap assembly is embodied such that the high current caused by the short-circuit between the terminals of the battery cell leads to an interruption of the connecting portion of the first terminal, i.e. the connector between the :0 connection plate and the battery cell (jelly-roll of the
• the cell in the overcharge state of the battery cell, the cell becomes isolated from the connection plate and thus from a battery system.
• the connecting portion of the first terminal may be
• the high current caused by the short- circuit between the first and second terminal of the battery cell leads to a melting of the fuse so that the battery cell and, in particular, the jelly-roll of the battery cell is 10 isolated from the (outer) connection plate.
• a power battery comprising the cap assembly as specified above is disclosed in claim 14.
• the power battery comprises a battery cell and a case.
• the cap assembly is sealed on top of the case to form an
• the battery cell is provided in the 5 accommodating space.
• the electrical/electronic device included in the cap assembly provides a high reliability of the battery cell and the whole power battery system.
• the proposed solution detects the excess of a voltage threshold value to release the overcharge safety action, i.e. to interrupt an electrical path between the connection plate of the cap assembly and an5 electrode of the battery cell.
• FIG. 1 shows an exploded view of a first embodiment of a cap assembly for a battery cell having electronic safety functionality
• Figure 2A shows a cross-sectional view of the first
• Figure 2B shows an enlarged view of a connecting portion of a terminal of the first embodiment of a cap assembly for a :5 battery cell having electronic safety functionality
• Figure 3 shows an exploded view of a second embodiment of a cap assembly for a battery cell having electronic safety functionality
• Figure 4A shows a top view onto the second embodiment of a cap assembly for a battery cell having electronic safety functionality
• Figure 4B shows a cross-sectional view of the second embodiment of a cap assembly for a battery cell having electronic safety functionality
• Figure 4C shows another cross-sectional view of the second embodiment of a cap assembly for a battery cell having electronic safety functionality
• Figure 5A shows a perspective view of a power battery to be sealed by a cap assembly having electronic safety
• Figure 5B shows a perspective view of a battery cell of a5 power battery.
• Figures 1 and 3 show different embodiments of a cap assembly 10, 20 for a battery cell having electronic safety
• the cap assembly 10, 20 comprises a cap plate 100 being electro-conductive, a first terminal 110a and a second terminal 110b, wherein both terminals 110a, 110b are configured to be coupled to different potentials of the
• the first terminal 110a is configured to be coupled to a first electrode of the battery cell
• the second terminal 110b is configured to be coupled to a second 10 electrode of the battery cell.
• the first terminal 110a has a first voltage potential, when the first terminal 110a is coupled to the first electronic of the battery cell.
• the second terminal 110b has a second voltage potential, when the second terminal is coupled to the second electronic of the battery cell.
• the first voltage potential can be a negative potential and the second voltage potential can be a positive potential. That means, when the cap assembly is connected 5 with the battery cell, the first terminal can be embodied as the negative terminal and the second terminal can be embodied as the positive terminal.
• the cap assembly 10, 20 further comprises an electrical/0 electronic device 120 having a variable electrical
• the first terminal 110a is coupled to the cap plate 100 by the electrical/electronic device 120, as
• the second terminal 110b is5 permanently electro-conductively connected to the cap plate 100.
• the electrical device 120 is configured such that an electrical conductivity of the electrical device 120 is dependent on a voltage between the first terminal 110a and the second terminal 110b of the cap assembly.
• the electrical/electronic device 120 is configured to have a first resistance, when the voltage between the first terminal 110a and the second terminal 110b is above a voltage
• the electrical device 120 is further
• the first resistance is lower than the second resistance.
• the electrical/electronic device can be embodied such that the electrical/electronic device has a low resistive
• the electrical/electronic device can be further embodied such that the electrical/electronic device has a high resistive/low conductive state or even an 5 insulating state, when the voltage between the first terminal 110a and the second terminal 110b is below the voltage threshold value.
• the cap assembly 10, 20 or the electrical/0 electronic device 120 may be configured such that the voltage threshold value is in a range between 4.0 V and 5.0 V and is preferably 4.5 V.
• the electrical/electronic device 120 may be configured as a voltage induction element to detect/monitor the battery voltage or the voltage between the first terminal 110a and 10 the second terminal 110b.
• the electrical/electronic device 120 may be configured as a variable resistor or a semiconductor device having the first resistance, when the battery voltage/voltage between the first terminal 110a and the second terminal 110b is above the voltage threshold value and having the second resistance, when the battery voltage/ voltage between the first terminal 110a and the second
• electrical/electronic device 120 may comprises at least one diode .
• connection plate 130 is arranged above the cap plate 100.
• the connection plate 130 is electro-conductively connected to the first terminal 110a.
• the electrical/electronic device 120 is arranged between the connection plate 130 and the cap plate 100.
• the first connection plate 130 has a lower surface 131, and the cap plate 100 has an upper surface :0 101.
• the first connection plate 130 is arranged above the cap plate 100 such that a portion 131a of the lower surface 131 of the first connection plate 130 faces a portion 101a of the upper surface 101 of the cap plate 100.
• connection plate 130 has a groove 132.
• the portion 131a of the lower surface 131 of the first connection plate 130 is formed as the bottom surface of the groove 132.
• portion 101a of the upper surface 101 of the 10 cap plate 100 has a groove 102.
• the portion 101a of the upper surface 101 of the cap plate 100 is formed as the bottom surface of the groove 102.
• the electrical/electronic device 120 is embedded in the groove 132 of the portion 131a of the lower surface 131 of the first connection plate 130.
• the cap assembly 10 comprises a first insulating component 140 being arranged between the negative connection plate 1300 and the cap plate 100.
• the first insulating component 140 is embodied such that a remaining portion 131b of the lower surface 131 of the first connection plate 130 is electrically isolated from the cap plate 100 by the first insulating component 140.
• the insulating component 140 comprises a hole5 141 through which the electrical/electronic device 120
• the cap plate 100 comprises a through-hole 103 which
• the first terminal 110a comprises a contacting portion 111a to contact the battery cell, in particular the first electrode of the battery cell.
• the first terminal 110a further comprises a connecting portion 112a to contact the connection plate 130.
• portion 111a extends through the hole 103 of the cap plate 100 to the connection plate 130.
• the cap assembly 10 further comprises an insulating component 10 170a having a through-hole 171 and a sealing element 150a.
• the connecting portion 112a extends through a hole 151 in the sealing element 150a and the through-hole 171 of the insulating component 170a and the through-hole 103 of the cap plate 100 and a through-hole 142 of the insulating component 140 to the connection plate 130.
• the upper face of the connecting portion 112a ends in a contacting hole 137 of the connection 5 plate 130.
• the cap assembly 10 further comprises a connection plate 160 being arranged above the cap plate 100 and being electro- conductively connected to the second terminal 110b.
• connection plate 160 is electro-conductively connected to the cap plate 100.
• the second terminal 110b comprises a
• the connecting portion 112b extends through a through-hole 151 of a sealing element 150b and a through-hole 171 of an insulating component 170b and a through-hole 104 of the cap plate 100 and ends in a hole 161 of the connection plate 160.
• terminal 110b is electrically connected to the connection plate 160.
• cap assembly 10 According to a possible embodiment of the cap assembly 10,
• the connecting portion 112a of the first terminal 110a is configured as a fuse 113, as shown in Figure 2B.
• the fuse 113 is configured as an aperture provided in the
• connection portion 112a of the first terminal 110a The
• connection portion 112a may be configured as a flat
• the cap assembly 10 is described in the following .
• the first terminal 110a is electrically connected to the connection plate 130, and the connection plate 130 is (nearly) electrically isolated from the cap0 plate 100 by the highly resistive state/insulating state of the electrical/electronic device 120.
• the voltage between the first terminal llOa/the connection plate 130 and the second terminal llOb/the connection plate 160 exceeds the voltage threshold value, for example a value of about 4.0 V :0 or preferably of about 4.5 V, the electrical conductivity of the electrical/electronic device 120 increases.
• conductive state of the electrical/electronic device changes from the highly resistive state/insulating state to the low resistive state so that a short-circuit current flows between :5 the first terminal 110a and the second terminal 110b via the cap plate 100.
• connecting portion 112a of the first terminal 110a melts and the current flow is interrupted.
• the battery cell thus becomes isolated from the battery system.
• the connecting portion 112a with the melting fuse 113 has a specific ampacity. This configuration suits specially for cases in which a specific fuse characteristic (ampacity) is required on cell from the energy storage/battery system.
• the first terminal 110a comprises a contacting portion 111a to0 contact the battery cell, in particular a first electrode of the battery cell.
• the first terminal 110a further comprises a connecting portion 112a to contact a first connection plate 130.
• the contacting portion 111a is formed as a bent conductive structure, for example a C-shaped bent structure, wherein the connecting portion 112a is disposed at one side of the upper portion of the contacting portion 111a.
• the connecting portion 112a may be configured :0 as a flat conductor, for example a conductive sheet, which is arranged at one side of the upper part of the contacting portion 111a.
• the connecting plate 130 has a portion 134 having a different :5 cross-sectional area from another portion 135 of the
• connection plate 130 may have a groove 136 which is provided in a central section of the connection plate 130.
• the electrical/electronic device 120 is disposed between the connection plate 130 and the cap plate 100.
• the electrical device 120 may comprises at least one diode. According to a possible embodiment, the
• 5 electrical/electronic device 120 comprises a through-hole
• the first terminal 110a In the assembled state of the cap assembly 20, the first terminal 110a, particularly the connecting portion 112a of the first terminal 110a, passes through the through-hole 121 of the electrical/electronic device 120.
• the connecting portion 112a of the first terminal 110a protrudes from the contacting portion 111a and extends through a through-hole 171 of an insulating component 170a, a through-5 hole 103 of the cap plate 100, the through-hole 121 of the electrical/electronic device 120 and the groove 136 of the connection plate 130.
• the embodiment of the cap plate 20 further comprises the :0 second terminal 110b, the sealing component 150b, the
• insulating component 170b and the connection plate 160 which are similar to the components described with reference to Figure 1 for the cap assembly 10.
• the terminal 110b is electrically connected to the cap plate 100.
• a normal operation state of a battery cell i.e. a 10 state in which the battery cell is charged below the
• the connecting plate 130 is (nearly) electrically isolated from the cap plate 100 by the highly resistive state/insulating state of the electrical/electronic device 120.
• connection plate 130 and the second terminal 11 Ob/connection plate 160 grows up.
• the voltage threshold value for example exceeds a value of 4.0 V and preferably a value of 4.5 V
• the conductive state of the0 electrical/electronic device 120 changes from the highly
• connection plate 130 is electro-conductively connected to the cap plate 100 by a low resistive state of the
• a short-circuit current occurs between the first terminal 110a and the second terminal 110b via the cap plate 100.
• the high short-circuit current causes a melting of :0 the connection portion 112a of the first terminal 110a so
• the second embodiment of of the cap assembly 20 is preferred.
• connection portion 112a of the second embodiment of the cap assembly 20 has higher ampacity in order to enable melting of the connection portion 112a during activation of electronic device 120, i.e. during the low resistive state of the electronic device 120, in comparison to the connection 10 portion 112a of the first embodiment of the cap assembly 10, the electronic device 120 is located such that the electronic device 120 surrounds the connection portion 112a.
• the heat generated during the current flow through the connection portion 112a of the first terminal 110a in the low resistive state of the electronic device 120 facilitate a faster meltdown of the connection portion 112a.
• connection portion 112a of the second 5 embodiment of the cap assembly 20 does not comprise a tapered region, the ohmic losses in the normal operation state of the battery cell are lower for the second embodiment of the cap assembly 20 than for the first embodiment of the cap assembly 10.
• the cap assembly 10, 20 having electrical/electronic safety functionality may be used to seal a case of a power battery.
• Figure 5A shows a power battery 1 comprising a battery cell 30 and a case 40 in which the battery cell 30 is arranged.5
• the cap assembly 10, 20, not shown in Figure 5A, is sealed on top of the case 40 to form an accommodating space 50.
• the battery cell 30 is provided in the accommodating space 50 of the power battery.
• the battery cell 30 may be formed as a jelly-roll with a jelly-roll termination adhesive 31.
• Figure 5B illustrates the power battery 1 comprising the battery cell 30 and the cap assembly 10, 20.
• Figure 5B illustrates the interior of the battery cell 30.
• connection plate 130 and the connection plate 160 are :5 formed as outer connection elements 131 and 161.
• the jelly- roll of the battery cell 30 comprises a negative electrode 60 with a current collector 61, a positive electrode 80 with a current collector 81, and a separator 70 positioned between the negative electrode 60 and the positive electrode 80.
• the 10 negative electrode 60 is connected to a tab 91.
• the positive electrode 80 of the battery cell 30 is electrically connected to a tab 92.
• the first terminal 110a of the cap assembly 10, 20 is electrically coupled to the negative electrode 60 of the battery cell 30 by the tab 91.
• the second terminal 110b of the cap assembly 10, 20 is electrically coupled to the positive electrode 80 of the battery cell 30 by the tab 92.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Power Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Connection Of Batteries Or Terminals (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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Family Cites Families (3)

• 2018
  • 2018-12-11 EP EP18830161.8A patent/EP3894262A1/de active Pending
  • 2018-12-11 WO PCT/EP2018/084392 patent/WO2020119897A1/en unknown

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