CPC H01M 10/613 (2015.04) [H01M 10/486 (2013.01); H05K 7/20163 (2013.01)] | 12 Claims |
1. A rechargeable battery system comprising at least a battery cell and an external cooling means, wherein the battery cell comprises an anode, a cathode, an electrolyte disposed between the anode and the cathode, a protective housing that at least partially encloses the anode, the cathode and the electrolyte, and a heat-spreader element disposed partially inside the protective housing and wherein the external cooling means is in thermal contact with the heat spreader element configured to enable transporting internal heat of the battery cell through the heat spreader element to the external cooling means;
wherein said heat-spreader element comprises a material selected from graphene film sheet, artificial graphite film, brass, Ti, Ni, Mg alloy sheet, boron arsenide, a composite thereof, or a combination thereof;
wherein the heat-spreader element has a thickness from 0.5 μm to 1 mm, and
wherein the heat-spreader element has a tab protruded outside of the protective housing,
wherein the tab is configured to controllably make thermal contact with the external cooling means and get disconnected with the external cooling means when a battery temperature reaches temperature Tc.
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