Engineering Quick Facts
Battery and EV Connectors at a Glance
Battery and EV connectors are sealed power-and-signal interconnect systems used between battery packs, electric motorcycles, charging equipment and battery-swap cabinets.
Connix M23 and M25 connector families combine high-current power contacts, optional protective earth and BMS or control-signal circuits in one compact interface.
Product-family options include IP67 and IP68 configurations; the final ingress rating, electrical load and cable specification must be confirmed against the approved drawing and test condition.
- Rated Current
- M23 power contacts up to 50 A; selected high-current catalogue options up to 120 A
- Rated Voltage
- Selected M23 configurations up to 300 V
- Contact Layouts
- 2+4 and 2+1+5 power, PE and signal combinations
- Operating Temperature
- -40°C to +105°C for specified M23 configurations
Battery Connector Series Comparison
Compare contact layout, current, cable requirements and sealing before selecting a connector. Final ratings must be confirmed against the approved drawing and actual operating conditions.
| Series | Pin Configuration | Rated Current | Rated Voltage | Protection |
|---|---|---|---|---|
| M23 2+4 | 2 power + 4 signal contacts | Up to 50 A power contacts | Up to 300 V | IP67 |
| M23 2+1+5 | 2 power + 1 PE + 5 signal contacts | Up to 50 A power contacts | Up to 300 V | IP67 |
| M25 2+4 | 2 power + 4 signal contacts | Per approved drawing | Per approved drawing | IP67 / IP68 by configuration |
| M25 2+1+5 | 2 power + 1 PE + 5 signal contacts | Per approved drawing | Per approved drawing | IP67 / IP68 by configuration |
Engineering note: Rated current and ingress protection depend on contact design, conductor size, ambient temperature, duty cycle, sealing components and the agreed validation method.
Waterproof Connections for Electric Two-Wheelers
An electric two-wheeler may use separate connections for the battery, motor, controller, charger, display, brakes and lighting. These interfaces experience vibration, movement, rain, dust and frequent maintenance, so the connector and cable assembly must be selected for the actual operating conditions.
Battery Discharge Connectors
Battery discharge connections carry power from the battery pack to the vehicle controller. Important parameters include rated current, peak current, conductor size, contact resistance, temperature rise, polarity protection, locking method and available space. Power-plus-signal contact layouts can also support temperature sensing, identification or control circuits.
Charging and Battery-Swap Connectors
Charging ports and battery-swap interfaces may be mated more frequently than fixed vehicle connections. The design should therefore consider mating-cycle requirements, alignment, touch protection, panel mounting, protective caps and whether the IP rating applies while mated or disconnected.
Available solution directions include M23 and M25-style high-current connectors, multi-contact power-and-signal interfaces, straight or right-angle cable outlets and panel-mounted receptacles. Final ratings depend on the approved configuration and test conditions.
Motor and Controller Cable Assemblies
Motor connections may combine phase power, Hall signals, temperature sensing and shielding. A custom harness can simplify vehicle installation by defining branch lengths, connector orientation, wire colors, labels and pin-to-pin wiring before production.
Typical Configuration Options
- Power-only or power-plus-signal contact layouts
- Cable-side plug and panel-mount receptacle combinations
- Straight and right-angle cable outlets
- Self-locking, threaded or quick-lock structures
- Overmolded cable entry and strain relief
- Custom cable length, wire gauge, pinout and labeling
- Protective caps for disconnected interfaces
Information Required for Product Selection
- Vehicle type and connector function
- Rated and peak current
- System voltage and signal requirements
- Power and signal contact count
- Required IP rating and test condition
- Cable size, material and overall length
- Panel dimensions and available installation space
- Mating-cycle, vibration and temperature requirements
- Estimated order quantity and target schedule
Recommended EV and Battery Connector Configurations
- 50A 2+4 Pin IP67 EV Battery Connector — two power and four signal contacts for electric two-wheelers.
- 50A 2+6 Pin IP67 EV Battery Connector — additional signal circuits for battery and controller systems.
- M23 2+4 Pin 50A IP67 Self-Locking Connector — power-plus-signal interface for EV and industrial equipment.
- M23 5 Pin 50A IP67 Self-Locking Connector — sealed five-contact high-current connection.
- E50-SPJ401 50A High-Current Battery Connector — positive power plug for battery and energy-storage projects.
- E120-SPJ401 120A High-Current Battery Connector — high-current positive plug for battery and DC power systems.
These are catalogue-backed starting points. Final selection must be confirmed against the complete electrical load, cable, mating and environmental requirements.
Custom EV Cable Assembly Development
CONNIXTECH can evaluate a complete cable assembly when a standard connector does not match the equipment. Development can cover connector selection, cable construction, pinout, overmolding, branch design, labeling, prototype sampling and agreed validation checks.
For other markets, explore our waterproof connector applications and products and engineering services. Available configurations can be reviewed in the Product Centre.
Need a battery, charging or motor connection? Send the current, voltage, contact layout, cable requirements and drawings for engineering review.
Latest M23 2+4 Engineering Guide
For a detailed selection example covering 50A power contacts, four signal circuits, 300V rating, IP67 sealing and custom cable options, read our M23 2+4 waterproof connector guide for EV battery systems.
Electric Motorcycle Battery Connector FAQ
What is the difference between a 2+4 and a 2+1+5 connector?
A 2+4 connector combines two power contacts with four signal contacts. A 2+1+5 configuration combines two power contacts, one protective contact and five signal contacts. The additional circuits may be assigned to temperature sensing, communication, identification, interlock or other control functions according to the approved pinout.
Can an M23 connector carry 50A?
Selected CONNIXTECH M23 high-current configurations are rated up to 50A under specified test conditions. Actual allowable current depends on the exact contact design, cable cross-section, ambient temperature, installation method and temperature-rise requirement. Confirm the final rating on the approved specification and drawing.
Is an IP67 connector waterproof when disconnected?
Not automatically. The IP rating may apply only when the plug and receptacle are correctly mated. When a connector remains disconnected outdoors, a compatible sealing cap and the specified installation method may be required.
Can the cable length wire gauge and pinout be customized?
Yes. CONNIXTECH supports OEM and ODM cable assemblies with custom cable length, conductor size, pin-to-pin wiring, connector orientation, overmolding, labels and packaging. Electrical requirements and drawings should be reviewed before sampling.
What information is needed for a battery connector quotation?
Provide the application, rated and peak current, system voltage, power and signal contact count, pinout, cable specification, panel dimensions, IP requirement, mating-cycle target, operating temperature, quantity and delivery schedule.