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ニッケル水素電池のシンプルモデル(LTspice)

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ニッケル水素電池のシンプルモデル(LTspice)の資料です。

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ニッケル水素電池のシンプルモデル(LTspice)

  1. 1. Nickel-Metal Hydride Battery Simplified SPICE Behavioral Model All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  2. 2. Contents <ul><li>Benefit of the Model </li></ul><ul><li>Model Feature </li></ul><ul><li>Concept of the Model </li></ul><ul><li>Parameter Settings </li></ul><ul><li>Ni-Mh Battery Specification (Example) </li></ul><ul><ul><li>5.1 Charge Time Characteristic </li></ul></ul><ul><ul><li>5.2 Discharge Time Characteristic </li></ul></ul><ul><ul><li>5.3 V bat vs. SOC Characteristic </li></ul></ul><ul><li>Extend the number of Cell (Example) </li></ul><ul><ul><li>6.1 Charge Time Characteristic, NS=7 </li></ul></ul><ul><ul><li>6.2 Discharge Time Characteristic, NS=7 </li></ul></ul><ul><li>Library Files and Symbol Files Location </li></ul><ul><ul><li>Simulation Index </li></ul></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  3. 3. 1. Benefit of the Model <ul><li>The model enables circuit designer to predict and optimize Ni-MH battery runtime and circuit performance. </li></ul><ul><li>The model can be easily adjusted to your own Ni-MH battery specifications by editing a few parameters that are provided in the datasheet. </li></ul><ul><li>The model is optimized to reduce the convergence error and the simulation time. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  4. 4. <ul><li>This Ni-MH Battery Simplified SPICE Behavioral Model is for users who require the model of a Ni-MH Battery as a part of their system. </li></ul><ul><li>The model accounts for Battery Voltage(V bat ) vs. Battery Capacity Level (SOC) Characteristic, so it can perform battery charge and discharge time at various current rate conditions. </li></ul><ul><li>As a simplified model, the effects of cycle number and temperature are neglected. </li></ul>2. Model Feature All Rights Reserved Copyright (C) Bee Technologies Corporation 2011
  5. 5. 3. Concept of the Model <ul><li>Ni-Mh battery Simplified SPICE Behavioral Model </li></ul><ul><li>[Spec: C, NS] </li></ul><ul><li>Adjustable SOC [ 0-1(100%) ] </li></ul><ul><li>The model is characterized by parameters: C which represent the battery capacity and SOC which represent the battery initial capacity level. </li></ul><ul><li>Open-circuit voltage (V OC ) vs. SOC is included in the model as an analog behavioral model (ABM). </li></ul><ul><li>NS ( Number of Cells in series ) is used when the Ni-mh cells are in series to increase battery voltage level. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 + - Output Characteristics
  6. 6. 4. Parameter Settings <ul><li>From the Ni-Mh Battery specification, the model is characterized by setting parameters C, NS, SOC and TSCALE. </li></ul><ul><ul><li>C is the amp-hour battery capacity [Ah] </li></ul></ul><ul><ul><li>e.g. C = 0.3, 1.4, or 2.8 [Ah] </li></ul></ul><ul><ul><li>NS is the number of cells in series </li></ul></ul><ul><ul><li>e.g. NS=1 for 1 cell battery, NS=2 for 2 cells battery (battery voltage is double from 1 cell) </li></ul></ul><ul><ul><li>SOC is the initial state of charge in percent </li></ul></ul><ul><ul><li>e.g. SOC=0 for a empty battery (0%), SOC=1 for a full charged battery (100%) </li></ul></ul><ul><ul><li>TSCALE turns TSCALE seconds(in the real world) into a second(in simulation) </li></ul></ul><ul><ul><li>e.g. TSCALE=60 turns 60s or 1min (in the real world) into a second(in simulation), TSCALE=3600 turns 3600s or 1h into a second. </li></ul></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Model Parameters: (Default values)
  7. 7. 5. Ni-Mh Battery Specification (Example) <ul><li>The battery information refer to a battery part number HF-A1U of SANYO. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Battery capacity [Typ.] is input as a model parameter Nominal Voltage 1.2V Capacity Typical 1350mAh Minimum 1250mAh Charging Current  Time 1350mA  about 1.1h Discharge cut-off voltage 1.0V
  8. 8. 5.1 Charge Time Characteristic <ul><ul><ul><ul><ul><li>Charging Current: 1350mA  about 1.1h </li></ul></ul></ul></ul></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 (min.) Measurement Simulation Charge: 1350mA SOC=0 means battery start from 0% of capacity (empty)
  9. 9. 5.1 Charge Time Characteristic  Simulation Circuit and Setting <ul><li>.TRAN 0 62 0 0.025 </li></ul><ul><li>.LIB ni-mh_battery.sub </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Charge Voltage A constant current charger at rate of capacity (e.g. 1  1350mA) 1 minute into a second (in simulation)
  10. 10. 5.2 Discharge Time Characteristic <ul><li>.TRAN 0 360 0 100m </li></ul><ul><li>.STEP PARAM rate LIST 0.2, 1, 2 </li></ul><ul><li>.LIB ni-mh_battery.sub </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 0.2C 1C 2C (min.) <ul><li>Battery voltage vs. time are simulated at 0.2C, 1.0C, and 2.0C discharge rates. </li></ul>TSCALE turns 1 minute into a second(in simulation), battery starts from 100% of capacity (fully charged)
  11. 11. 5.3 V bat vs. SOC Characteristic <ul><ul><ul><ul><ul><li>Nominal Voltage: 1.2V </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Capacity: 1350mAh </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Discharge cut-off voltage: 1.0V </li></ul></ul></ul></ul></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 2700mA Measurement Simulation Simulation 1350mA 270mA (Ah)
  12. 12. 5.3 V bat vs. SOC Characteristic  Simulation Circuit and Setting <ul><li>.TRAN 0 360 0 100m </li></ul><ul><li>.STEP PARAM rate LIST 0.2, 1, 2 </li></ul><ul><li>.LIB ni-mh_battery.sub </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 A constant current discharger at rate of capacity (e.g. 1  1350mA) 1 minute into a second (in simulation)
  13. 13. 6. Extend the number of Cell (Example) <ul><li>The battery information refer to a battery part number HHR-150AAB01F7 </li></ul><ul><li> of Panasonic. </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Basic Specification The number of cells in series is input as a model parameter Ni-MH needs 7 cells to reach this voltage level <ul><ul><li>Voltage - Rated </li></ul></ul><ul><ul><li>8.4V </li></ul></ul><ul><ul><li>Capacity </li></ul></ul><ul><ul><li>1500mAh </li></ul></ul><ul><ul><li>Structure </li></ul></ul><ul><ul><li>1 Row x 7 Cells Side to Side </li></ul></ul><ul><ul><li>Number of Cells </li></ul></ul><ul><ul><li>7 </li></ul></ul>
  14. 14. 6.1 Charge Time Characteristic, NS=7 <ul><li>Charging Current: 300mA (0.2 Charge) </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Voltage (hour) The battery needs 5 hours to be fully charged
  15. 15. 6.1 Charge Time Characteristic, NS=7  Simulation Circuit and Setting <ul><li>.TRAN 0 5.2 0 2.5m </li></ul><ul><li>.LIB ni-mh_battery.sub </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 1 hour into a second (in simulation) Charge Voltage
  16. 16. <ul><ul><ul><ul><ul><li>Voltage - Rated: 8.4V </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Discharging Current: 300mA(0.2C), 750mA(0.5C), 1500mA(1.0C) </li></ul></ul></ul></ul></ul>6.2 Discharge Time Characteristic, NS=7 All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 (hour) 0.2C 1C 0.5C
  17. 17. 6.2 Discharge Time Characteristic, NS=7  Simulation Circuit and Setting <ul><li>.TRAN 0 6 0 2.5m </li></ul><ul><li>.STEP PARAM rate LIST 0.2, 0.5, 1 </li></ul><ul><li>.OPTIONS RELTOL=0.01 </li></ul><ul><li>.LIB ni-mh_battery.sub </li></ul>All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Parametric sweep “rate” for multiple rate discharge simulation 1 hour into a second (in simulation)
  18. 18. Library Files and Symbol Files Location All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 … Simulation C:Program FilesLTCLTspiceIVlibsub C:Program FilesLTCLTspiceIVlibsym Copy/Paste into Copy/Paste into <ul><li>Copy the library files (.lib) from the folder …Simulation.sub, then paste into the folder C:Program FilesLTCLTspiceIVlibsub </li></ul><ul><li>Copy the symbol files(.asy) from the folder …Simulation.asy, then paste into the folder C:Program FilesLTCLTspiceIVlibsym </li></ul>
  19. 19. Simulation Index All Rights Reserved Copyright (C) Bee Technologies Corporation 2011 Simulations Folder name <ul><li>Charge Time Characteristic................................. </li></ul><ul><li>Discharge Time Characteristic............................. </li></ul><ul><li>V bat vs. SOC Characteristic.................................. </li></ul><ul><li>Charge Time Characteristic, NS=7....................... </li></ul><ul><li>Discharge Time Characteristic, NS=7................... </li></ul>Charge_Time Discharge_Time Discharge_SOC Charge_Time(NS) Discharge_Time(NS)

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