Power estimation device and method for estimating chargeable/dischargeable power of electric storage device, electric storage apparatus
A technology for electric storage components and discharge power, which is applied in the field of chargeable and dischargeable power estimation devices of electric storage components and electric storage devices, and can solve the problem of inability to estimate chargeable and dischargeable power and inability to maximize the use of secondary battery charge and discharge performance , Insufficient research and other issues, to achieve the effect of suppressing the inability to accurately estimate the chargeable and dischargeable power
Inactive Publication Date: 2014-04-16
GS YUASA INT LTD
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Problems solved by technology
[0006] There may be a change in the relationship between SOC and chargeable power due to the deterioration of the secondary battery, but this change has not been sufficiently studied in the above-mentioned prior art
Therefore, there is a problem that the accurate charging and discharging power cannot be estimated, and the charging and discharging performance of the secondary battery cannot be fully utilized.
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[0155] The technology disclosed in this specification is not limited to the embodiments described above and described in the drawings, and includes, for example, various aspects described below.
[0156] CPU12 can also not execute Figure 5 or Figure 9 A structure in which at least one process of S21 to S24 receives the result (temperature, SOC, internal resistance) estimated or measured by an external device such as the ECU. In this case, CPU 12 does not need at least one of battery temperature measurement unit 7 , battery voltage measurement unit 8 , current sensor 4 , and current measurement unit 14 .
[0157] CPU12 in Figure 4 S11 or Figure 8 In S13 , the direction of the current flowing to the wiring 10 is detected based on the measurement result of the current sensor 4 . Then, the CPU 12 may determine whether or not there is a request to obtain chargeable power from the secondary battery 5 and whether there is a request to obtain dischargeable power based on the d...
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The invention provides a power estimation device for estimating chargeable / dischargeable power of an electric storage device, an electric storage apparatus, and a method for estimating chargeable / dischargeable power, which restrains incapability of estimating the chargeable / dischargeable power because of electric storage deterioration. On condition that a CPU (12) determines a fact that the state of a secondary battery (5) is in a current-limited state, a first correction coefficient alpha is calculated and a chargeable power value WC1 is calculated. On the other hand, on condition that the CPU (12) determines a fact that the state of the secondary battery (15) is in a voltage-limited state, a second correction coefficient beta is calculated; and on condition that the current SOC value of the secondary battery (5) is larger than a boundary SOC value, a chargeable power value WC2 is calculated. Besides, on condition that the CPU (12) determines the current SOC value of the secondary battery (5) is below the boundary SOC value, a simulated chargeable power value WCK and the chargeable power value WC2 are calculated.
Description
technical field [0001] It relates to a technique for estimating the chargeable and dischargeable power of an electric storage element. Background technique [0002] The chargeable and dischargeable power is the maximum power that can be input and output to the storage element. For example, in a hybrid vehicle, a monitoring device that monitors a secondary battery estimates the chargeable and dischargeable power of the secondary battery, and the hybrid control ECU may calculate the target power of the engine based on the chargeable and dischargeable power. Here, conventionally, there are a plurality of tables that record the chargeable and dischargeable power corresponding to the state of charge (State Of Charge, also referred to as remaining capacity, hereinafter referred to as SOC) of the secondary battery, and estimate the chargeable and dischargeable power control device (Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Docum...
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IPC IPC(8): G01R31/36
CPCG01R31/3679G01R31/3648G01R31/3624G01R31/392G01R31/3842
Inventor 关口宽中村将司
Owner GS YUASA INT LTD