Rechargable 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;
a first current collector for transferring electrons;
a current interrupter interposed between the first electrode and the first current collector, wherein the current interrupter comprises a heat sensitive material configured to cause, upon activation of at least a temperature trigger, a formation of a nonconductive gap between the first electrode and the first current collector, wherein the forming of the nonconductive gap electrically decouples the first electrode from the first current collector and diverts current flow from the first current collector, wherein the heat sensitive material is configured to transition the current interrupter from an engaged configuration to an unengaged configuration upon activation of at least the temperature trigger, wherein the first electrode and the first current collector are electrically coupled when the current interrupter is in the engaged configuration, and wherein the nonconductive gap is formed between the first electrode and the first current collector when the current interrupter is in the unengaged configuration;
a second electrode having an opposite polarity of the first electrode; and
a separator interposed between the first electrode and the second electrode.
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 the resistivity of the current limiter does not transition at temperatures within the temperature range for standard operation.
9. The battery of claim 2 , wherein the resistivity of the 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 cause the formation of the nonconductive gap 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 via a laminated connection provided by the current interrupter when the current interrupter is in the engaged configuration, and wherein the forming of the nonconductive gap delaminates the laminated connection between the first electrode and the first current collector.
13. A method, comprising:
forming a nonconductive gap between an electrode within a battery and a current collector, wherein the forming of the nonconductive gap is caused by a heat sensitive material in response to an activation of least a temperature trigger, wherein the heat sensitive material comprises a current interrupter interposed between the electrode and current collector, wherein the forming of the nonconductive gap electrically decouples the electrode from the current collector and diverts current flow from the current collector, wherein the heat sensitive material is configured to transition the current interrupter from an engaged configuration to an unengaged configuration upon activation of at least the temperature trigger, wherein the electrode and the current collector are electrically coupled when the current interrupter is in the engaged configuration, and wherein the nonconductive gap is formed between the electrode and the current collector when the current interrupter is in the unengaged configuration.
14. The battery of claim 1 , wherein the heat sensitive material forms the nonconductive gap by at least generating, upon activation of at least the temperature trigger, a gas.
15. The battery of claim 1 , wherein the heat sensitive material forms the nonconductive gap by at least generating, upon activation of at least the temperature trigger, a liquid.
16. The battery of claim 15 , wherein the liquid generates a gas through vaporization.
17. The battery of claim 15 , wherein the liquid generates a gas by reacting with the first electrode, the first current collector, the separator, and/or an electrolyte comprising the battery.