Battery system, vehicle, and battery mounted device
First Claim
Patent Images
1. A battery system comprising:
- one or more lithium ion secondary batteries each having a power generating element and an electrolyte being impregnated in the power generating element and containing lithium ions;
charge and discharge control means for controlling charging and discharging of each of the lithium ion secondary batteries; and
internal resistance detecting means for performing at least one of detection and estimation about a level of internal resistance in at least one of the lithium ion secondary batteries;
wherein the charge and discharge control means comprises;
a plurality of mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a predetermined charge and discharge condition, the mode control means including;
increasing mode control means for controlling charging and discharging each of the lithium ion secondary batteries on an increasing charge and discharge condition, the increasing mode control means being configured to increase the internal resistance of each of the lithium ion secondary batteries by continuously repeatedly performing charging and discharging by charge and discharge control; and
decreasing mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a decreasing charge and discharge condition different from the increasing charge and discharge condition, the decreasing mode control means being configured to decrease the internal resistance of each of the lithium ion secondary batteries by continuously repeatedly performing charging and discharging by charge and discharge control;
mode selecting means for selecting one mode control means to be used from the plurality of mode control means,wherein the mode selecting means is configured;
to select the decreasing mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively high; and
to select the increasing mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively low, andwherein the internal resistance detecting means is resistance correlation physical quantity detecting means for estimating a level of the internal resistance based on a resistance correlation physical quality having a correlation with the internal resistance.
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Abstract
A battery system (SV1) comprises a lithium ion secondary battery (101), charge and discharge control means (S2, S6-S8), and internal resistance detecting means (M1). The charge and discharge control means comprises: mode control means including increasing mode control means (S2) for increasing the internal resistance of the lithium ion secondary battery and decreasing mode control means (S8) for decreasing the internal resistance; and mode selecting means (S6, S7) for selecting the decreasing mode control means (S8) or the increasing mode control means (S2) when a level of the internal resistance is estimated by the internal resistance detecting means.
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Citations
21 Claims
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1. A battery system comprising:
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one or more lithium ion secondary batteries each having a power generating element and an electrolyte being impregnated in the power generating element and containing lithium ions; charge and discharge control means for controlling charging and discharging of each of the lithium ion secondary batteries; and internal resistance detecting means for performing at least one of detection and estimation about a level of internal resistance in at least one of the lithium ion secondary batteries; wherein the charge and discharge control means comprises; a plurality of mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a predetermined charge and discharge condition, the mode control means including; increasing mode control means for controlling charging and discharging each of the lithium ion secondary batteries on an increasing charge and discharge condition, the increasing mode control means being configured to increase the internal resistance of each of the lithium ion secondary batteries by continuously repeatedly performing charging and discharging by charge and discharge control; and decreasing mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a decreasing charge and discharge condition different from the increasing charge and discharge condition, the decreasing mode control means being configured to decrease the internal resistance of each of the lithium ion secondary batteries by continuously repeatedly performing charging and discharging by charge and discharge control; mode selecting means for selecting one mode control means to be used from the plurality of mode control means, wherein the mode selecting means is configured; to select the decreasing mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively high; and to select the increasing mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively low, and wherein the internal resistance detecting means is resistance correlation physical quantity detecting means for estimating a level of the internal resistance based on a resistance correlation physical quality having a correlation with the internal resistance. - View Dependent Claims (8, 9, 16, 17)
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2. A battery system comprising:
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one or more lithium ion secondary batteries each having a power generating element and an electrolyte being impregnated in the power generating element and containing lithium ions; charge and discharge control means for controlling charging and discharging of each of the lithium ion secondary batteries; and internal resistance detecting means for performing at least one of detection and estimation about a level of internal resistance in at least one of the lithium ion secondary batteries; wherein the charge and discharge control means comprises; a plurality of mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a predetermined charge and discharge condition, the mode control means including; first mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a first charge and discharge condition; and second mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a second charge and discharge condition different from the first charge and discharge condition; mode selecting means for selecting one mode control means to be used from the plurality of mode control means, wherein when a comparison is made between a case of discharging each of the lithium ion secondary batteries by the first mode control means and a case of discharging each of the lithium ion secondary batteries by the second mode control means, a discharge current by the second mode control means is made smaller on a predetermined discharge condition and equal to or smaller on other discharge conditions than a discharge current by the first mode control means, and the mode selecting means is configured; to select the second mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively high; and to select the first mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively low. - View Dependent Claims (3, 4, 18, 20)
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5. A battery system comprising:
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one or more lithium ion secondary batteries each having a power generating element and an electrolyte being impregnated in the power generating element and containing lithium ions; charge and discharge control means for controlling charging and discharging of each of the lithium ion secondary batteries; and internal resistance detecting means for performing at least one of detection and estimation about a level of internal resistance in at least one of the lithium ion secondary batteries; wherein the charge and discharge control means comprises; a plurality of mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a predetermined charge and discharge condition, the mode control means including; first mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a first charge and discharge condition; and second mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a second charge and discharge condition different from the first charge and discharge condition; mode selecting means for selecting one mode control means to be used from the plurality of mode control means, wherein when a comparison is made between a case of charging each of the lithium ion secondary batteries by the first mode control means and a case of charging each of the lithium ion secondary batteries by the second mode control means, a charge current by the first mode control means is made smaller in a predetermined charge condition and equal to or smaller in other charge conditions than a charge current by the second mode control means, and the mode selecting means is configured; to select the second mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively high; and to select the first mode control means when the internal resistance detecting means detects or estimates that the internal resistance is relatively low. - View Dependent Claims (6, 7, 19, 21)
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10. A battery system comprising:
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one or more lithium ion secondary batteries each having a power generating element including a positive electrode plate and a negative electrode plate, an electrolyte containing lithium ions and being impregnated in the power generating element, and a battery case holding the power generating element and the electrolyte; and charge and discharge control means for controlling charging and discharging of each of the lithium ion secondary batteries, the electrolyte including;
a retained electrolyte retained between the positive electrode plate and the negative electrode plate; and
a stored electrolyte stored between the power generating element and the battery case so as to allow interconnection with the retained electrolyte, andstored electrolyte concentration detecting means for performing at least one of detection and estimation on a level of the lithium ion concentration in the stored electrolyte of the electrolyte in at least one of the lithium ion secondary batteries, wherein the charge and discharge control means comprises; a plurality of mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a predetermined charge and discharge condition, the mode control means including; first mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a first charge and discharge condition; second mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a second charge and discharge condition different from the first charge and discharge condition; and third mode control means for controlling charging and discharging each of the lithium ion secondary batteries on a third charge and discharge condition different from the first and second charge and discharge conditions; and mode selecting means for selecting one mode control means to be used from the plurality of mode control means, wherein when a comparison is made between a case of charging and discharging each of the lithium ion secondary batteries by the first mode control means, a case of charging and discharging each of the lithium ion secondary batteries by the second mode control means, and a case of charging and discharging each of the lithium ion secondary batteries by the third mode control means, a discharge current by the second mode control means is made smaller on a predetermined discharge condition and also equal to or smaller on other discharge conditions than a discharge current by the first mode control means, a charge current by the third mode control means is made smaller on a predetermined charge condition and also equal to or smaller on other charge conditions than a charge current by the first mode control means, the mode selecting means is configured; to select the second mode control means when the stored electrolyte concentration detecting means detects or estimates that the lithium ion concentration of the stored electrolyte is higher than a concentration threshold value for the second mode; and to select the third mode control means when the stored electrolyte concentration detecting means detects or estimates that the lithium ion concentration of the stored electrolyte is lower than the concentration threshold value for the third mode lower than the concentration threshold value for the second mode. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification