Battery Heater Control

Battery heater control algorithm

Since R2022b

• 

Libraries:
Simscape / Battery / BMS / Thermal Management

Description

This block implements a battery heater control algorithm.

Temperature is crucial in batteries as low temperatures significantly decrease the battery life. It is then fundamental to keep the temperature of each cell of the battery under control and activate heaters or coolers to keep the temperature under safe limits. If the temperature is too low, the battery management system (BMS) enables a heater.

This block supports single-precision and double-precision floating-point simulation.

Note

To enable single-precision floating-point simulation, the data type of all inputs and parameters must be single.

This diagram shows the structure of the block:

Equations

The Battery Heater Control block activates the heater only if the temperature of the ambient drops below the value of the Ambient temperature threshold for heater parameter. If the temperature drops below this threshold, the value at the Command output port is equal to:

$$Command=\{\begin{array}{cc}0,& T_{coolant}\ge T_{off}\\ Comman{d}_{old},& T_{on}<T_{coolant}<T_{off}\\ 1,& T_{coolant}\le T_{on}\end{array}$$

where

• T_coolant is the coolant temperature.

• T_on is the coolant temperature at which the heater switches on.

• T_off is the coolant temperature at which the heater switches off. This value is greater than T_on.

• Command_old is the command at the previous time step.

Ports

Input

AmbientTemperature — Ambient temperature

scalar

Temperature of the ambient, specified as a scalar.

CoolantTemperature — Coolant temperature

scalar

Temperature of the coolant, specified as a scalar.

Output

Command — Heater command

scalar

Heater command, returned as a scalar. If this value is equal to 0, the heater switches off. If this value is equal to 1, the heater switches on.

Parameters

Ambient temperature threshold for heater — Ambient temperature threshold for heater

278.15 (default) | positive scalar

Ambient temperature at which the block activates the heater.

Switch-on coolant temperature — Switch-on coolant temperature

278.15 (default) | positive scalar

Coolant temperature at which the heater switches on.

Switch-off coolant temperature — Switch-off coolant temperature

290.15 (default) | positive scalar

Coolant temperature at which the heater turns off. The value of this parameter must be greater than the value of the Switch-on coolant temperature parameter.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2022b