In recent years, electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) have become increasingly popular in the automotive sector. These new vehicle models require strong battery management systems (BMS) to monitor the conditions of battery cells, in order to bring out full potential of the battery component. JAE offers a wide variety of connectors required for BMS applications. Below you can find a full lineup of our BMS connector solutions.
2020/09/04
Connectors for EV and PHEV Battery Systems
MX Series
Trends in EV/PHEV Market and Connectors for Battery Systems
The demand for electric vehicles (EV) and plug-in hybrid vehicles (PHEV) has been increasing rapidly around the world in response to stricter environmental regulations to prevent air pollution. EV/PHEV are equipped with a large number of battery cells, and in order to maximize battery performance, a battery management system (BMS) is essential to constantly monitor the status of the battery cells. There are various requirements on the connectors used in BMS, such as smaller size and lower height. JAE offers a wide variety of connectors that meet these requirements.The following sections describe examples of BMS connector use cases and the individual features of each connector solution.
Use Case Example of Connectors for Battery Systems
The battery unit installed in the EV and PHEV consists of many electronics including battery modules and a battery monitoring system that monitors the status of battery cells. JAE has developed a wide range of automotive connectors to be used in connecting the components within each module.For the connectors on the battery module, it is required to have multiple key options to prevent a mating error during installation. There is also a lower height requirement due to the limited space. JAE has developed the automotive connectors to meet those requirements, with a good track record in their adoptions.The following sections describe the product features of the connectors used in battery systems.
Connector Lineup for Battery Systems
| MX34 Series | MX84B Series | MX77 Series | ||
| Terminal Size (pin width) | 0.64 mm | 0.4 mm | ||
| Mating Area Pitch | 2.2 mm | Signal：1.8 mm, Power：2.1 mm | ||
| Outline Size 40-Conductor Socket Housing | Thickness Dimension | 21.3 mm | MX77A：13.5 mm MX77D：9.5 mm | |
| Width Dimension | 47.1 mm | 46.9 mm | ||
| Depth Dimension | 15.2 mm | 17.0 mm | ||
| Insulator Flammability Rating | Pin side SMT type : UL94 V-0 Others : UL94 HB | UL94 V-0 | Pin side : UL94 V-0 Socket side : UL94 HB | |
| Socket Side | - Supporting cable connections, the contact is a box type resistant to the external force, and the connection is resistant to twisting. Two-piece spring structure has a proven track record. - Preset retainer is reliable for detecting half insertion of contacts during harness assembly | |||
| - A bridge at the lock section provides protection on the external load, ensuring higher safety during operation. | - MX77A has a bridge structure at the lock section to provide protection on the external load, similar to MX34/MX84B. - MX77D achieves a further reduction in height by eliminating the bridging structure, while securing reduction in cable entrainment at the lock section. | |||
| Pin Side | Wide range of variations - Right angle DIP, SMT type - Straight DIP, SMT type - Relay type | - Right angle DIP type - Relay type | - SMT type with right angle (with leg to increase strength on the board mounting) | |
| Number of Positions | 3～40 | 7～40 | 4～40 | |
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