Energy Storage System (ESS) Capacitor Solution

1. Solution Introduction

Grid-scale Energy Storage Systems (ESS) are essential for stabilizing the power grid and enabling the growth of renewable energy. The Power Conversion System (PCS) within a Battery ESS (BESS) is the critical interface between the batteries and the grid. Its DC-Link capacitors must endure decades of service, handling continuous, high-power charge and discharge cycles. This solution combines the immense bulk capacitance of screw terminal capacitors with the reliability of film capacitors to create a PCS front-end built for maximum endurance.

2. Solution Block Diagram

Block diagram of an Energy Storage System's Power Conversion System (PCS).

Fig. 1: DC-Link capacitor bank within a BESS Power Conversion System.

3. Core Advantages of this Solution

Extreme Durability & Lifespan: A hybrid bank of long-life screw terminal and film capacitors provides a solution designed to match the 20+ year lifespan of the battery installation.
High Cycle Endurance: Film capacitors handle high-frequency switching ripple, while the large screw terminal capacitors provide the bulk energy storage, protecting both from excessive stress and extending their operational life.
Scalability: This modular approach allows for the creation of multi-megawatt capacitor banks by paralleling components to meet any power requirement.
Safety and Reliability: Utilizes proven, robust components designed for the demands of utility-scale power electronics.

4. Recommended Bill of Materials (BOM)

Function	Recommended Series	Key Benefits	Link
Main DC-Link Bulk Storage	Jianghai CD 130 (Banked)	Massive capacitance, high ripple current, cost-effective bulk storage.	View CD130
DC-Link High-Frequency Filtering	Jianghai CBB 131	Handles switching ripple, extends electrolytic life, improves efficiency.	View CBB131
System Control Power	Jianghai CD 295	Proven long-life performance for critical control circuits.	View CD295

Note: The design of a PCS capacitor bank is a complex engineering task involving thermal modeling and bus bar design. Our FAEs have experience in this area and can assist with component selection and lifetime calculations for your specific charge/discharge profile.

SHENZHEN – LiTong, a leading authorized distributor for Jianghai Capacitor, is pleased to announce the completion of a major expansion of its primary warehousing facility in Shenzhen. The new, larger space allows for a significant increase in on-hand inventory, shortening lead times and ensuring supply chain stability for our valued customers.

The expansion specifically focuses on increasing stock levels for high-demand series, including the CD 295 long-life snap-in, the CD 130 screw terminal, and the CBB 131 DC-Link film capacitors.

"In today's dynamic market, supply chain resilience is a key competitive advantage for our customers," said Li Wei, General Manager of LiTong. "This investment in our logistics capabilities reaffirms our commitment to being the most reliable source for authentic Jianghai components. When an engineer needs a sample or a production run needs to start, we want to be able to say 'it's on the shelf' as often as possible."

The expanded facility is now fully operational. Customers can expect improved availability and faster shipping times for many popular part numbers effective immediately.

Capacitor Solution for Energy Storage Systems (ESS)

1. Solution Introduction

2. Solution Block Diagram

3. Core Advantages of this Solution

4. Recommended Bill of Materials (BOM)

LiTong Expands Warehouse to Increase Jianghai Inventory