Electrochemical energy accumulator and balancing method
First Claim
1. A method for balancing a multiplicity of strings of electrochemical storage modules (10) connected in parallel with one another by means of at least one universal buck-boost (UniBB) module and connected by a loading contactor to a load and by a charging contactor to a charger, the method comprising:
- identifying (S100) a first state of charge (I) of a first storage module (M1) in a first string of the multiplicity of strings,identifying (S200) a second state of charge (II) of a second storage module (M2) in a second string of the multiplicity of strings, wherein the second storage module (M2) is a UniBB module,disconnecting the multiplicity of strings of electrochemical storage modules from the load and the charger, andoperating the first storage module (M1) as a voltage source while the second storage module (M2) is operated as a current source to balance the first state of charge (I) and the second state of charge (II),wherein the electrochemical storage modules (M1, M2, Mn) further include(a) electrochemical storage modules which are put into a blocking mode if they belong to strings (S0) not involved in balancing the multiplicity of strings of electrochemical storage modules (10),(b) electrochemical storage modules which are put into a bypass mode if they belong to strings (S1, S3) involved in balancing the multiplicity of strings of electrochemical storage modules (10), orboth (a) and (b).
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Abstract
An electrochemical energy accumulator (100) and a method for balancing a multiplicity of sections (S1, S2, S3) of electrochemical accumulator modules (10) connected in parallel with one another by means of at least one UniBB module are proposed. In this context, the following steps are carried out: detecting (S100) a first state of charge (I) of a first accumulator module (M1), detecting (S200) a second state of charge (II) of a second accumulator module (M2), wherein the second accumulator module (M2) is a UniBB module, and operating (S300) the second accumulator module (M2) as a power source in order to adapt the first stage of charge (I) and the second state of charge (II) to one another.
17 Citations
10 Claims
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1. A method for balancing a multiplicity of strings of electrochemical storage modules (10) connected in parallel with one another by means of at least one universal buck-boost (UniBB) module and connected by a loading contactor to a load and by a charging contactor to a charger, the method comprising:
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identifying (S100) a first state of charge (I) of a first storage module (M1) in a first string of the multiplicity of strings, identifying (S200) a second state of charge (II) of a second storage module (M2) in a second string of the multiplicity of strings, wherein the second storage module (M2) is a UniBB module, disconnecting the multiplicity of strings of electrochemical storage modules from the load and the charger, and operating the first storage module (M1) as a voltage source while the second storage module (M2) is operated as a current source to balance the first state of charge (I) and the second state of charge (II), wherein the electrochemical storage modules (M1, M2, Mn) further include (a) electrochemical storage modules which are put into a blocking mode if they belong to strings (S0) not involved in balancing the multiplicity of strings of electrochemical storage modules (10), (b) electrochemical storage modules which are put into a bypass mode if they belong to strings (S1, S3) involved in balancing the multiplicity of strings of electrochemical storage modules (10), or both (a) and (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification