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1. (WO2018001460) METHOD AND DEVICE FOR ESTIMATING A VOLTAGE OF A BATTERY
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Claims (We claim)

1. Method for estimating a voltage of a battery, wherein

- a given battery model (BM) is provided, wherein the given battery model (BM) is a single particle model,

- a C-rate of the battery is determined,

- the battery model (BM) is adapted based on the C-rate,

- the voltage of the battery is estimated by means of the adapted battery model (BM) .

2. Method according to claim 1, wherein the C-rate of the battery is compared with a first threshold and if the C-rate is higher than the first threshold, the battery model (BM) is adapted so that a complex model is achieved and if the C-rate is lower than the first threshold, the battery model (BM) is adapted so that a simplified model is achieved.

3. Method according to claim 1, wherein the C-rate of the battery is compared with a first threshold and a second threshold which is smaller than the first threshold and

- if the C-rate is higher than the first threshold, the battery model (BM) is adapted so that a complex model is achieved,

- if the C-rate is lower than the first threshold and higher than the second threshold, the battery model (BM) is adapted so that a simplified model is achieved.

- if the C-rate is lower than the first threshold and higher than the second threshold, the battery model (BM) is adapted so that a simpler model than the simplified model is

achieved.

4. Method according to claim 3, wherein the value of the second threshold is between 2C and 4C.

5. Method according to claim 2, 3 or 4, wherein the value of the first threshold is between 8C and 12C.

6. Method according to any one of the claims 1 to 5, wherein given model parameters of the battery model (BM) are adapted based on the C-rate.

7. Method according to any one of the claims 1 to 6, wherein a given set of equations of the battery model (BM) are adapted based on the C-rate.

8. Device (1) for estimating a voltage of a battery, wherein the device (1) is designed to execute the method according to any one of the claims 1 to 7.