Rechargeable battery with internal current limiter and interrupter
A high energy density rechargeable (HEDR) battery employs a combined current limiter/current interrupter to prevent thermal runaway in the event of internal discharge or other disruption of the separator. The combined current limiter/current interrupter is interior to the battery.
1. An improved high energy density rechargeable battery, comprising:
a first electrode and a second electrode having an opposite polarity of the first electrode;
a first current collector for transferring electrons;
a separator interposed between the first electrode and the second electrode; and
a current interrupter interposed between the first electrode and the first current collector, wherein the current interrupter comprises a heat sensitive material configured to generate a gas upon activation of at least a temperature trigger, wherein the gas interrupts a laminated connection between the first electrode and the first current collector to form nonconductive gap that electrically decouples the first electrode from the first current collector.
2. The battery of claim 1 , further comprising a current limiter.
3. The battery of claim 2 , further comprising a second current collector.
4. The battery of claim 3 , wherein the current limiter is interposed between the second electrode and the second current collector.
5. The battery of claim 2 , wherein the current limiter is interposed between the first electrode and the first current collector.
6. The battery of claim 5 , wherein the current limiter and the current interrupter are simultaneously incorporated into a single protective layer interposed by lamination between the first electrode and the first current collector.
7. The battery of claim 2 , wherein a resistivity of the current limiter is greater than the internal resistivity of the first electrode at temperatures above a temperature range for standard operation.
8. The battery of claim 2 , wherein a resistivity of the current limiter does not transition at temperatures within a temperature range for standard operation.
9. The battery of claim 2 , wherein a resistivity of he current limiter is less than the internal resistivity of the first electrode at temperatures within a temperature range for standard operation.
10. The battery of claim 1 , wherein the temperature trigger is activated when temperature exceeds a temperature range for standard operation.
11. The battery of claim 1 , wherein the heat sensitive material is further configured to generate the gas upon activation of a voltage trigger, and wherein the voltage trigger is activated when voltage exceeds a voltage range for standard operation.
12. The battery of claim 1 , wherein the first electrode and the first current collector are electrically coupled when the current interrupter is in an unengaged configuration, and wherein the nonconductive gap is formed between the first electrode and the first current collector when the current interrupter is in an engaged configuration.
13. The battery of claim 12 , wherein the heat sensitive material is configured to transition the current interrupter from the unengaged configuration to the engaged configuration upon activation of at least the temperature trigger.
14. The battery of claim 12 , wherein the first electrode and the first current collector are electrically coupled via a laminated connection provided by the current interrupter when the current interrupter is in the unengaged configuration, and wherein the forming of the nonconductive gap delaminates the laminated connection between the first electrode and the first current collector.
15. A method, comprising:
interrupting a laminated connection between an electrode and a current collector of a battery to form a nonconductive gap that electrically decouples the electrode from the current collector, wherein the laminated connection is interrupted by a gas generated by a heat sensitive material upon activation of at least a temperature trigger, wherein the heat sensitive material comprises an interrupt layer interposed between the electrode and current collector.