Battery packs and automobiles containing them

Abstract

The battery pack according to the present invention may include a plurality of battery modules, a pack case provided to house the plurality of battery modules and having recessed grooves formed in the bottom plate on which each of the plurality of battery modules is mounted, and a fire extinguishing member housed in the recessed grooves and positioned below the battery modules, which generates a fire extinguishing substance when a heat event occurs in the battery modules.

Claims

1. Multiple battery modules, A pack case provided to house the plurality of battery modules inside, and having recessed grooves formed in the bottom plate on which each of the plurality of battery modules is mounted, A battery pack characterized by including a fire extinguishing member housed in the groove portion and positioned below the battery module, which generates a fire extinguishing substance when a heat event occurs in the battery module.

2. The battery pack according to claim 1, characterized in that the fire extinguishing member is made of a material that undergoes an endothermic reaction and generates carbon dioxide as a byproduct of the thermal reaction.

3. The battery pack according to claim 1, characterized in that the fire extinguishing member includes a plurality of fire extinguishing agent capsules.

4. The battery pack according to claim 1, characterized in that the fire extinguishing member is arranged to be in contact with the lower surface of the battery module.

5. A cooling channel is provided inside the bottom plate of the aforementioned pack case, Cross beams forming walls between the battery modules so that each battery module is arranged in a partitioned space, The battery pack according to claim 1, further comprising: a cooling path blocking unit that, when a thermal event occurs in any of the battery modules, drops from inside the crossbeam to block a cooling path located below the battery module in which the thermal event occurred.

6. The aforementioned cooling path blocking unit is A shielding block member is provided with an electromagnet that is arranged inside the crossbeam and electrically connected to each of the plurality of battery modules, The pack case includes a magnetic material provided inside the bottom plate and positioned opposite the electromagnet such that a repulsive force acts across the cooling channel, The battery pack according to claim 5, characterized in that it is configured such that the current supply to the electromagnet electrically connected to the battery module where a thermal event has occurred is cut off.

7. The battery pack according to claim 6, characterized in that a fuse unit that interrupts the flow of current based on a predetermined temperature or signal is coupled to the cable connecting the battery module and the interruption block member.

8. The battery pack according to claim 7, characterized in that the fuse portion is a thermal fuse.

9. The aforementioned blocking member is The battery pack according to claim 6, characterized in that it includes a weight balance member coupled to the electromagnet.

10. The aforementioned cooling channel is A main flow path having a refrigerant inlet at one end and a refrigerant outlet at the other end, Branch channels that branch off from the main channel and pass through the lower part of the corresponding crossbeam, Individual module cooling channels are provided so as to pass through the lower region of the corresponding battery module from each of the aforementioned branch channels, The battery pack according to claim 6, characterized in that it includes the branch channel and the connecting channel connected to the main channel.

11. The battery pack according to claim 10, characterized in that the cooling path blocking unit is configured to block the branched path connected to the individual module cooling path that passes through the lower region of the battery module.

12. The aforementioned battery module is It includes a plurality of battery cells and a module case that houses the plurality of battery cells, The battery pack according to claim 1, characterized in that the module case includes one or more vent holes in the upper plate that covers the top of the battery cell.

13. The aforementioned pack case is The battery pack according to claim 1, characterized in that the outer wall includes one or more gas outlets.

14. An automobile characterized by including a battery pack according to any one of claims 1 to 13.

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