OEM energy storage power supplies and BMS board solutions. 48V–1000V DC battery stacks, 5–100kW modules, 3000VAC isolation. IEC 62477 / UL 1741 design targets.

Energy Storage Power & BMS Engineering

Energy Storage Power & BMS Systems

Specification-led OEM development of energy storage power supplies, chargers and BMS boards — the power stage plus the management board around the cells, not a standalone BMS chip.

Energy Storage Power & BMS Engineering

Energy Storage Power & BMS Platforms

PaiYi develops both battery management boards (BMS) and the power platforms that surround them for energy storage applications. The electrical targets below remain open until the battery stack, BMS topology, target market and operating environment are confirmed.

Battery StackVoltage range, transients and grounding conditions define the source environment.
BMS Power PathAuxiliary conversion, isolation and standby behavior are specified around the BMS architecture.
Monitoring & ControlStable rails support sensing, control and protection functions within the defined scope.
PCS / EMS EnvironmentSystem integration, common-mode conditions and EMC constraints are reviewed together.

BMS Power Supply Design Priorities

The final architecture should be selected from real system requirements rather than a fixed catalogue assumption.

Input and Output Definition

Confirm the input source, normal operating range, transient conditions, required output rails, regulation and sequencing expectations.

Power and Standby Demand

Define continuous and peak loads together with sleep, wake-up and standby consumption targets across operating modes.

Isolation and Grounding

Review isolation boundaries, working voltage, grounding strategy, common-mode conditions and insulation coordination requirements.

Protection and Fault Behavior

Specify the required input, output and thermal protection behavior, fault reporting expectations and recovery method.

Temperature and Lifetime

Set the operating and storage temperature ranges, thermal constraints, cooling conditions and intended service-life target.

EMC and System Integration

Evaluate emissions, immunity, surge and transient requirements in the actual battery, PCS and EMS installation environment.

Preliminary Specification Worksheet

Values are intentionally left open for engineering review. They will be completed only after the project requirements are supplied.

Parameter
Target
Definition Required
Input Voltage
3-phase 380–480 V AC ±15%; 24/48 V DC BMS management rail
Nominal source, operating range, surge and transient profile.
Output Voltage
Configurable 48 / 96 / 240 / 1000 V DC battery stack (CC-CV)
Required rails, tolerances, regulation, ripple and sequencing.
Rated / Peak Power
5–100 kW per module; scalable to MW; peak 1.2× rated
Continuous load, peak demand, duty cycle and start-up behavior.
Isolation Requirement
3000 V AC in-out (reinforced); 1500 V AC DC-bus to chassis
Isolation boundary, working voltage and insulation coordination.
Standby Consumption
< 5 W system; BMS board < 1 W
Sleep current, wake-up method and allowed standby power.
Operating Temperature
PCS −30 to +55 °C; BMS board −40 to +85 °C
Ambient range, enclosure conditions, cooling and derating.
Protection Functions
OVP / OCP / OTP / SCP / reverse-polarity; insulation monitoring; thermal-runaway warning
Required input, output, thermal and fault-recovery behavior.
EMC Requirements
CISPR 11 Class A; IEC 61800-3; EN 61000-6-2 / -4
Target standards, market, installation class and test scope.
PCS / EMS Environment
IEC 62477-1, UL 1741, IEC 62619, GB/T 34131 (BMS)
System topology, grounding, switching environment and interface-adjacent constraints.
Mechanical Format
19-inch rack / IP20 cabinet; 1–4 U BMS sub-module; DIN-rail option
Enclosure, PCB or module format, dimensions, mounting and connectors.

Integration with PCS and EMS Environments

A BMS auxiliary supply operates inside a wider electrical system. Review of the surrounding equipment helps prevent late changes during validation.

System Context to Confirm

Battery-stack voltage and switching transients, PCS operating modes, grounding and isolation boundaries, nearby communication wiring, enclosure conditions, start-up and shutdown sequencing, fault states, and the target EMC test environment.

OEM Development Scope

The project scope is defined jointly and documented before sampling.

Electrical and Mechanical Options

  • Input and output configuration
  • Power, isolation and standby targets
  • Protection and thermal design scope
  • Housing, dimensions, mounting and connectors
  • Cable, label and packaging requirements

Information Needed for Evaluation

  • Battery chemistry, stack voltage and BMS topology
  • Load profile and required output rails
  • Target market and compliance requirements
  • Operating environment and service-life expectation
  • Mechanical drawing, connector definition and order forecast

From Requirement Review to Production

Requirement Review

Confirm the electrical, mechanical, environmental and compliance inputs.

Architecture Proposal

Define the power platform, open items, validation scope and development path.

Sample Validation

Evaluate samples against agreed operating modes, faults and system conditions.

Production Readiness

Finalize approved specifications, documentation and manufacturing requirements.

86.58Wh portable power station OEM reference design
Reference Design

86.58Wh Portable Power Station → OEM Reference Design

A shipped example of our OEM work: this 86.58Wh portable power station was engineered and brought to mass production by us for an outdoor-power brand, and is selling really well on Amazon across the dash cam and camping categories.

86.58Wh Li-ion30W USB-C PD18W QC 3.012V/10A Cigarette Socket630 g Portable
SpecificationOEM Portable Power Station
Battery capacity86.58Wh (3.7V 23400mAh; 11.1V 7800mAh)
USB-C PD output30W max, laptop-capable (PD 3.0)
USB-A outputsQC 3.0 18W + 5V/2.4A 12W
DC outputs12V/10A cigarette socket (120W max), 12V/5A DC (72W max)
RechargeUSB-C PD 30W input, fully charged in about 4 hours
ApplicationsDash cam, camping, astrophotography rigs
Dimensions159 x 159 x 130 mm
Weight630 g
Air travelUnder 100Wh, carry-on permitted
CertificationFCC, CE, RoHS
Listing statusSelling really well on Amazon
  • Developed as a complete unit. System design, electronics and final assembly handled in our Huizhou plant, from concept to mass production.
  • Certified and fully protected. FCC, CE and RoHS certification arranged before mass production, with over-current, over-voltage, short-circuit and temperature protection built in.
  • Sized for real use. 86.58Wh keeps a dash cam running through the night, recharges in about four hours over USB-C PD, and stays under the 100Wh airline limit.
  • Higher power, same team. We develop, design and produce higher-output outdoor power stations for projects that need more than this 86.58Wh class.

Frequently Asked Questions

Q
What power do you provide for energy storage systems?
We supply the power stage plus the management board around the cells, not a standalone BMS chip. This covers 3-phase AC input, 24/48 V BMS auxiliary rails and 48-1000 V DC battery stacks.
Q
Do you integrate with PCS and EMS environments?
Yes. Our design priorities include integration with PCS and EMS environments, with a defined communication and grounding strategy so the supply drops into your system architecture.
Q
Can you deliver BMS auxiliary power and charging together?
Yes. The BMS power path is an auxiliary converter feeding the management board, while the main stage handles charge and discharge of the battery stack.
Q
What standards apply to ESS power supplies?
Typical targets are IEC 62477, UL 1741, IEC 62619 and battery-management standards such as GB/T 34131, selected by the target market.

Discuss Your Energy Storage Power & BMS Requirements

Share the available specification, block diagram or target operating conditions for an initial engineering review.