Battery pack directed venting system
First Claim
1. A battery pack thermal management system, comprising:
- a sealed battery pack enclosure configured to hold a plurality of batteries; and
a battery venting assembly integrated into said sealed battery pack enclosure, wherein said battery venting assembly is comprised of;
an exhaust port integrated into an outer wall of said sealed battery pack enclosure;
a valve retention plate coupled to a surface of said outer wall of said sealed battery pack enclosure, wherein said valve retention plate covers said exhaust port, and wherein said valve retention plate is comprised of a plurality of retention plate ports; and
a plurality of valves configured to seal said plurality of retention plate ports, wherein each of said plurality of valves seals said corresponding retention plate port under normal operating conditions and unseals said corresponding retention plate port when an excess pressure arises within said sealed battery pack enclosure, said excess pressure due to one or more of said plurality of batteries entering into thermal runaway,wherein a first portion of each valve of said plurality of valves is comprised of a retention plate port sealing member, and wherein a second portion of each valve of said plurality of valves is comprised of a retention member configured to be captured within a retention aperture corresponding to each retention plate port.
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Accused Products
Abstract
A thermal management system is provided that minimizes the effects of thermal runaway within a battery pack, the system using an integrated battery venting assembly comprised of an integrated exhaust port, a valve retention plate that covers the exhaust port and includes a plurality of retention plate ports, and a plurality of valves that are configured to seal the retention plate ports under normal conditions and unseal the retention plate ports during thermal runaway. As hot gas passes through the retention plate ports, the plate is configured to melt and be ejected, thereby allowing subsequent hot gas to pass through the larger exhaust port. A perforated cover plate may be used to protect the external surfaces of the retention plate and valves. An internally mounted exhaust guide may be used to direct the flow of hot gas expelled during the thermal runaway event.
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Citations
19 Claims
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1. A battery pack thermal management system, comprising:
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a sealed battery pack enclosure configured to hold a plurality of batteries; and a battery venting assembly integrated into said sealed battery pack enclosure, wherein said battery venting assembly is comprised of; an exhaust port integrated into an outer wall of said sealed battery pack enclosure; a valve retention plate coupled to a surface of said outer wall of said sealed battery pack enclosure, wherein said valve retention plate covers said exhaust port, and wherein said valve retention plate is comprised of a plurality of retention plate ports; and a plurality of valves configured to seal said plurality of retention plate ports, wherein each of said plurality of valves seals said corresponding retention plate port under normal operating conditions and unseals said corresponding retention plate port when an excess pressure arises within said sealed battery pack enclosure, said excess pressure due to one or more of said plurality of batteries entering into thermal runaway, wherein a first portion of each valve of said plurality of valves is comprised of a retention plate port sealing member, and wherein a second portion of each valve of said plurality of valves is comprised of a retention member configured to be captured within a retention aperture corresponding to each retention plate port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification