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EV CHARGER APP REDESIGN
ROLES
User Experience Designer (UX)
User Interface Designer (UI)
User Experience Researcher
DELIEVERABLES
Primary Research
Secondary Research
Data Analysis
Affinity diagramming
High-fidelity Prototype
SPECIFICATIONS
Duration: 4 Weeks
Tools: XD, Photoshop, Figma
Contributions
My role was focusing on user research, user experience, and user interface design. This project progressed into 4 weeks full on design-sprint approach working intimately with the EV owner and conducting user testing to tackle the problems. Besides, I translated the insights into the features, addressed problems by applying design solutions.
Objective
The main goal of this application is to help users to enhance their charging experience.
Buloo EV charging app provides information for users to find the optimal route of nearby EV charging stations. It also helps users to customize their schedules and manage their charging status effectively.
Challenge
• Identify main issues with Level 2 EV charger and charging experience then tackle problems and find solutions to improve user experience.
• Provide an optimal charging path with easier and user-friendly user experience.
INTRODUCTION
CONCEPT BACKGROUND
Electric vehicles (EV) have steadily increased over the years. The growth is accelerating as major automakers announce the transition to all-electric. Drawing from increasing EV adoption and expanding charging infrastructures, experts highlight that by the year 2022, electric vehicles will cost the same as their gasoline-driven equivalents. At that point, the sales of EV will take off.
This project is focused on improving user experience in using the Level 2 EV charging system.
PROCESS
Iterate
Research
Primary & Secondary Research
Define the audience
Understand audience context and needs
Analysis
Codes
Top-down principles networks comparison
Define
Problem assumptions
Pain points
Ideation
Concept sketches
Low-Fi wireframe
High-Fi wireframe
Validate
Usability Testing
RESEARCH
SECONDARY RESEARCH
Facts about EV Charging: Trend / Time & Cost
MARKET GROWTH
Global EV charger market expected to grow 44% by 2021
SPEED INCREASE
Ultrafast EVSE can charge up to 100% within 15-30 minutes
MORE RENEWABLE POWER
Powering EV charging stations through renewable energy
$ 500
EV Car Yearly Cost
$ 1400
Gasoline Yearly Cost
V.S
SECONDARY RESEARCH
Types of EV Charger: Decision & Analysis
EV Promotion - Improving convenience for public charger
Various situations - different scenarios and spaces
Accessibility - which users can study more easily
Level 1 120 Volts
Leve 2 240 Volts
DC Fast 480 Volts
8-10 hrs
4-8 hrs
20 mins
Sleeping, working
Working, parking, waiting
Parking, waiting
PRIMARY RESEARCH
I conducted interviews with EV car users to understand their motivations and experiences with EV charging. I observed their use of the charger in their natural setting.
" Dave is a user who owns an EV car (Tesla X), his level of satisfaction towards Tesla is very high in general. He is satisfied with not having to buy gas and is also a big fan of its lines of the design. I asked a series of questions about his interaction with the cars. The questions were mostly open-ended to get a deeper understanding of his experience, and it allowed us to discover more than we expected."
USABILITY TESTING
I conducted usability testing to understand the path of current experience. From the first-person view to the third person view, I recorded the whole process to observe user behavior, understand main functions and features, and identify usability problems.
TASKS
Find a charging point
Read and understand information on the device and complete charging
Charger the car
Make sure the car is connected
Make sure the car is being charged
Learn more about
2
3
4
5
6
1
FIRST-PERSON VIEW
THIRD-PERSON VIEW
• Identify problems
• List steps
• Learn functions
• Analyze design and context
• Identify problems
• List steps
• Learn functions
• Analyze design and context
• Observe user behaviors
FIRST-PERSON VIEW
THIRD-PERSON VIEW
METHOD
The insights discovered in secondary and primary research on the level-2 charging system was sorted through and organized based on principles from Nielsen’s 10 Usability Heuristics and Shneiderman’s 8 Golden Rules. The technique allowed me to identify distinct clusters of problems and determine the next steps and further research.
10 usability heuristics by Jakob Nielsen (Interaction Design)
Universal Design Principles (Product Design)
• Trust
• Emotion
• Learnability
• Easy to Use
• Actual & Desired Use
• Aesthetic and minimalist Design
• Consistency
• Efficiency
• Error Prevention
• Error Recovery
• Flexibility and Efficiency to use
• Information Feedback
• Match between system and the real world
• Reduce short-term memory load
• Status Update
AFFINITY DIAGRAMMING WITH ATLAS
DEFINE
FINDINGS - ADVANTAGES & PROBLEMS
ADVANTAGES
PROBLEMS
• Universally understood
• Renewable sources
• Low maintenance
• Colors are not universal
• Displays are not customizable
• Users have range anxiety
• Lack of external power management system
• Location of charging not clear enough
• Feedback on the connection status
DEFINE
DESIGN DIRECTIONS
The holistic experience of charging
From searching for a charging station to planning for the next charge
Optimize interface design and improve learnability
Designing for universally understandable information and indicators; Use visual elements, visual hierarchy to improve the visual appeal and enhance user learnability
Incorporate a screen
Provide helpful, essential and effective information for users to track the status of charging
Apply AI
Serve accurate estimator for future tips considering different factors that affect battery range to reduce user's range anxiety.
IDEATION
MY SOLUTIONS & HIGH-FI PROTOTYPE
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"DASHBOARD"
02 DESIGN DIRECTION - INCORPORATE SCREEN
My Solution
Dashboard page helps you manage your car effectively
Check your charging status and time remaining
Apply visual elements to improve the visual appeal and hierarchy
03 DESIGN DIRECTION - APPLY AI
My Solution
Dashboard page provides information for the future tips
Provide time remaining for users to reduce their anxiety
Provide achievements and saving information for users to optimize their experience and enhance their engagement experience.
"PROFILE"
01 DESIGN DIRECTION - LEARNABLITY
My Solution
Optimized interface design
Provide user interface that users can easy to log-in and set their car info
Set your card information for the future to pre-pay
Customize your profile
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"CHARGING STATION"
04 DESIGN DIRECTION -THE HOLISTIC EXPERIENCE OF CHARGING
My Solution
Book the charger nearby by you and get the route
From searching for a charging station to planning for the next charge
