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Safety device for electrical storage cell battery and battery equipped with the device

  • US 20010006747A1
  • Filed: 12/19/2000
  • Published: 07/05/2001
  • Est. Priority Date: 12/23/1999
  • Status: Active Grant
First Claim
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1. A safety device for a battery of electrical storage cells composed of modules connected in series each including a storage cell or a group of storage cells and in particular a group of storage cells connected in parallel, said device including at least one individual circuit for individually short circuiting a module if it should fail and maintaining permanently the electrical continuity between the other modules connected in series with it in said battery, wherein said individual circuit includes a first shunt circuit that is connected to the two end terminals of a module in said battery and includes an electrical energy consuming member in series with a switching member for applying a shunt to the terminals of said module via said consuming member if the voltage at the terminals of said module is greater than a particular upper voltage threshold value, said circuit directly short circuiting the terminals of said module if the voltage at said terminals of said module falls below a particular lower voltage threshold value.

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