Absorption　energy　storage　(AES)　can　effectively　address　the　intermittency　and　instability　of　renewable　energy,　enabling　its　efficient　utilization　and　storage.　To　optimize　the　performance　of　AES　systems,　this　study　establishes　a　finite-time　thermodynamic　model　of　an　AES　heating　system,　comprehensively　considering　the　internal　irreversibility　within　the　system　as　well　as　the　energy　storage　and　release　time　ratio.　The　study　investigates　the　relationship　between　energy　storage　efficiency　(ESE)　and　the　heating　rate　of　the　system,　as　well　as　factors　affecting　system　performance.　Under　the　condition　of　a　fixed　total　heat　transfer　area,　the　heat　exchanger　area　allocation　is　optimized,　yielding　optimal　area　ratios　for　the　four　components　as　31　%,　21　%,　26　%,　and　22　%,　respectively.　Through　the　optimized　model,　the　maximum　heating　rate　per　unit　total　heat　exchange　area　increased　by　4.8　times.　Additionally,　the　impacts　of　irreversibility　factor,　the　storage　and　release　time　ratio,　heat　source　temperature,　and　heat　transfer　coefficient　on　the　ESE　and　heating　rate　are　analyzed.　These　findings　provide　valuable　guidance　for　the　design　of　AES　systems.