Charging circuit for a charge accumulator and method for charging the same
First Claim
1. A charging circuit for a charge accumulator, comprising:
- a first terminal for supplying a charging voltage and for connecting the charge accumulator connected to a reference potential terminal;
a second terminal for providing a load voltage and for connecting an electrical load;
a control assembly connected to the first and second terminals and comprising a signal output for providing a first charge state signal and a test output for providing a test signal; and
a current source that is coupled to the second terminal,wherein the first charge state signal is provided as a function of a value of an additional voltage between the first and second terminals and as a function of the test signal, and wherein the charging voltage is supplied as a function of the first charge state signal.
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Accused Products
Abstract
In one embodiment, a charging circuit for a charge accumulator comprises a first terminal (A1) for supplying a charging voltage (UC) and for connecting the charge accumulator (SC) connected to a reference potential terminal (10), a second terminal (A2) for providing a load voltage (UD) and for connecting an electrical load (D1), a control assembly (ST) which is coupled to the first and the second terminals (A1, A2) and has a signal output (A3) for providing a first charge state signal (S1) and a test output (TA) for providing at test signal (on), and a current source (I1) that is coupled to the second terminal (A2), wherein the first charge state signal (S1) is provided depending on a value of an additional voltage (U12) between the first and the second terminals (A1, A2) and depending on the test signal (on), and wherein the charging voltage (UC) is supplied depending on the first charge state signal (S1). The invention also relates to a method for charging a charge accumulator.
14 Citations
17 Claims
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1. A charging circuit for a charge accumulator, comprising:
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a first terminal for supplying a charging voltage and for connecting the charge accumulator connected to a reference potential terminal; a second terminal for providing a load voltage and for connecting an electrical load; a control assembly connected to the first and second terminals and comprising a signal output for providing a first charge state signal and a test output for providing a test signal; and a current source that is coupled to the second terminal, wherein the first charge state signal is provided as a function of a value of an additional voltage between the first and second terminals and as a function of the test signal, and wherein the charging voltage is supplied as a function of the first charge state signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for charging a charge accumulator comprising the steps of:
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supplying a charging voltage to the charge accumulator; switching on a current source coupled to the charge accumulator or an auxiliary current source coupled to the charge accumulator; determining an additional voltage dropping as a function of the charging voltage;
switching off the current source or the auxiliary current source;checking whether a determined value of the additional voltage has reached a value of a summation voltage, wherein the summation voltage comprises a sum having a minimum voltage of the current source and a delta voltage of the charge accumulator; if yes, providing a first charge state signal and ending the charging; and if no, continuing to supply the charging voltage. - View Dependent Claims (17)
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Specification