Battery

Grid battery storage — equivalent-circuit Li-ion pack tracking a dispatch signal.

Action space	Box((1,)), all actions in [-1, 1]
Observation space	Box((5,))
Tracked variable(s)	delivered power (MW)
Episode length	360 steps (1800 s at 5 s per step)
Import	from target_gym import GridBattery, BatteryParams
Cite as	battery-v1

Action space

Actions are normalised to [-1, 1] and mapped onto the plant's real actuator range inside the environment.

#	meaning	min	max
0	power	-1	1

Observation space

5 values. Indices (3,) carry the tracked variable(s) that the reward scores.

Rewards

Dispatch tracking, minus degradation, minus a gentle pull to mid charge.

Every environment in this suite scores on one contract: the reward is (tracking terms, multiplied) x (1 - weighted costs), bounded in [0, 1], and reaches 1 only while the target is held exactly. See Reward shaping.

Starting state

reset samples the initial condition and the target; state has 9 fields.

Episode end

Termination. See check_is_terminal.

Truncation. After 360 steps.

Baselines

A tuned PID ships with this environment.

Arguments

parameter	default
delta_t	5
max_steps_in_episode	360
energy_nominal	7.2e+09
power_max	1e+06
n_series	192
capacity_As	9e+06
R0	0.02
R1	0.01
C1	20000
ocv_a	3
ocv_b	1.15
ocv_c	0.3
ocv_d	12
ocv_e	0.05
…	23 more, see the params dataclass