Safety device for electrical storage cell battery and battery equipped with the device
First Claim
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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Accused Products
Abstract
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 connected in parallel. A circuit individually short circuits a module if it should fail and maintains the electrical continuity between the other modules connected in series with it. An individual circuit includes a first shunt circuit connected to the terminals of a module and includes an energy consuming member in series with a switching member for applying a shunt to the terminals of the module via the consuming member if the voltage at the terminals of the module is greater than a particular upper voltage threshold value. The circuit short circuits the module if the voltage at the terminals of the module falls below a particular lower voltage threshold value.
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Citations
16 Claims
- 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.
- 9. A battery of electrical storage cells made up of modules connected in series and each including a storage cell or a group of storage cells and in particular a group of storage cells connected in parallel, said battery including a safety 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.
Specification