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Authorized Suzhou distributor · Xinya Electronic Co., Ltd. 📞 +86 15862457677 📫 [email protected]
Xinya AWM Wire Authorized Suzhou distributor · Xinya Electronic Co., Ltd.

BMS Wiring Harness | Energy Storage Battery Harness

BMS and energy-storage harnesses: voltage-sense leads, balance and temperature circuits, fused taps and pack-to-inverter power runs built to your schematic.

Energy storage BMS sensing harness with ring terminals
Made to drawing. No prices are published and there is no cart. Send the drawing, a sample or a list of from-to points and we will quote the wire, connector, crimp and test method in writing.

Energy Storage & BMS Harness: what we build

A BMS harness is a wiring diagram made physical, and the risk is a lead landing one cell out. Every sense lead in the assemblies we build is cut to a length calculated from your cell map, marked with its position, and keyed at the plug so the wrong module cannot physically accept it.

The sense side and the power side are quoted separately because they are different problems. Sense leads are 22 to 26 AWG, dense, and want tidy routing and strain relief; the pack power run is a 1000 V DC cable that wants the right stranding, the right jacket and a properly terminated shield. Both sit in this catalogue as wire lines you can reference independently.

Fusing at the tap, fusible links and inline protection are built in where the schematic calls for them, so protection lives in the harness rather than relying on the module electronics alone.

How we build it

  • Length-matched sense leads cut to your cell map, not to a nominal figure
  • Position keying and printed numbering at every tap to prevent mis-plugin
  • Fused taps, fusible links and inline protection integrated into the harness
  • Temperature-sensor circuits and communication buses on the same assembly
  • Point-to-point continuity recorded position by position against the schematic
  • Flame-retardant sleeving and defined bend radii for cabinet and rack routing

Wire we build this harness on

Every conductor is Xinya wire from this site's own catalogue, so the style inside the harness can be traced to a published data sheet. These are the lines most often specified for this application:

If your drawing names a style that is not listed here, ask — the catalogue published on this site is a subset of what the factory runs, and we can quote against a style number as easily as against a description.

How to get a quotation

Send the drawing, the sample, a photograph with a scale in shot, or a table of from-to points. Our reply names the wire style, the connector series, the crimp specification, the sleeving and the test method, so your engineers can approve the part rather than interpret a description. Nothing on this site carries a price: every harness is quoted against the specification you provide.

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Questions buyers ask about energy storage & bms harness

How do you stop a sense lead being plugged into the wrong cell?

By making the harness intolerant of it. Positions are marked, leads are cut to distinct lengths so the geometry resists a swap, and where the connector system allows it we key the plugs per module group. Continuity is then verified point-to-point against your schematic before the harness leaves the bench.

Can you incorporate fusing into the sense harness?

Yes. Fused taps and fusible links are integrated where the schematic specifies them, which places the protection at the point of the tap rather than leaving it to the module electronics.

Which wire suits a 1000 V DC pack power run?

UL 4703 photovoltaic wire at 1000 V, or H1Z2Z2-K at 1.5 kV DC where the run has to satisfy a European approval. Both are documented lines in this catalogue, so the harness traces back to a real component.

What conductor range do you use for the sense leads?

22 to 26 AWG is typical, usually tinned copper. Larger sense leads make the harness stiff and hard to route inside a module group, which is the opposite of what the assembly needs.

Do you supply the communication harness as well?

Yes. CAN and other communication buses are usually run as a shielded pair, and we build that either as a separate part or combined with the sense harness where the routing allows.

Other Energy & Renewables harnesses

Request a quotation for this harness

Tell us the style, AWG, colour and quantity — or attach nothing and just describe the requirement. We reply to every enquiry.

We use your details only to answer this enquiry. No prices are published on this site.

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Questions & answers

Frequently asked questions

Certifications, lead time, payment, shipping and MOQ — the points buyers ask about most often. If something is still unclear, send us your requirement and we will answer directly. See the full FAQ →

01 Are you a manufacturer or a trading company?

We are a wire harness manufacturer — cutting, stripping, crimping, sealing and testing are all carried out in-house at our Suzhou plant. We are also an authorised distributor of Xinya brand electronic wire, so you can source both the wire and the finished harness from one supplier.

02 What certifications do your electronic wires have?

Our electronic wires carry UL, VDE, PSE and CE approvals, together with RoHS and REACH compliance for the European market; TUV approvals are available for PV and renewable-energy wire. Certificates and test reports are issued by the manufacturer and can be supplied with your quotation on request.

03 How long is the lead time?

For electronic wire, popular styles such as UL1007, UL1015, UL1061 and UL1569 are normally available quickly; other styles, non-standard colours and cut lengths usually take around 7 days. Wire harnesses are made to order, so the schedule depends on your drawing, connector availability and quantity — we confirm it in the quotation.

04 What are your payment terms?

We commonly accept T/T (telegraphic transfer), PayPal and Western Union. Typically a 30% deposit is required before production, with the balance paid before shipment.

05 How do you ship the goods?

Samples and small orders are shipped by international express (DHL, FedEx, UPS, TNT) or by air freight. Larger orders normally go by sea to reduce freight cost. We can quote EXW, FOB, CIF or door-to-door terms and will recommend the option that best fits your budget and delivery date.

06 Do you have a minimum order quantity (MOQ)?

We keep a low MOQ to support your business. Generally the MOQ is 1 piece for standard models, although it may vary slightly for customised products. Small trial orders are welcome.

07 Can you build harnesses to our own drawing or sample?

Yes. We build to print and build to sample — send us a 2D drawing, a BOM, connector part numbers or even a photo of the part in use, and we will assemble, test and quote accordingly.

08 Can I get a sample before placing a bulk order?

Yes. We are happy to build a prototype first so that you can approve the fit, crimp and finish before committing to volume. Send the drawing and the target quantity and we will quote sample cost and lead time.

09 What information do you need to give a quotation?

For wire: the style or UL number, AWG, voltage and temperature rating, insulation, conductor, colour and length. For harnesses: the drawing or BOM, connector brand and part number, terminal and housing type, wire specification, cut length and tolerance, sleeving or tubing, label and packaging requirements, quantity and destination. If anything is unclear we will ask — or propose a construction for you.

10 Do you support OEM / ODM and private labelling?

Yes. We work with customer-specified connectors and brands as well as JST, Molex and HongXing, and can add printed markers, custom labels, printed bags and your own carton artwork for OEM and ODM projects.

11 How do you control quality?

Every order goes through incoming wire inspection, cutting and stripping checks, crimp height and terminal pull-force testing, 100% continuity and open-and-short testing, and a final dimensional and visual inspection. Inspection records can be supplied with the shipment when your project requires them.

12 Can you help with wire and connector selection?

Yes — our engineers help match wire gauge, insulation and temperature rating to your current, voltage and working environment, and select a terminal and housing combination that crimps reliably. Describe the application or send a sample and we will propose a construction.

13 Can you supply cut lengths and custom packaging?

Yes. Wire can be supplied in cut lengths, coils or spools, with PE bags, cartons, pallets and printed labels arranged to suit your warehouse or production line.

14 Do you ship worldwide, and can I visit the factory?

We ship worldwide, with regular shipments to Europe, North America, South-East Asia, the Middle East and Australia. You are welcome to visit our plant in Suzhou, and you can see our production lines in the factory videos on this site.

15 What happens if there is a quality problem after delivery?

Contact us with the order or batch number and photos of the issue. We will check it against our production and inspection records and, where the fault is confirmed on our side, arrange replacement or credit.

Send us your requirement See our production lines

Need wire to a specification?

Send the style, AWG range, colour and length — or your BOM and drawing. We will come back with construction, availability and lead time. This catalogue publishes no prices; every enquiry is quoted directly.

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