BYD Atto 3 battery dismantle P1

Summary

In this video, the creator takes viewers through the teardown of a BYD 803 battery pack. Starting with the removal of the battery and exploration of the internal layout, the video showcases the cooling channels, battery cells, and the BMS (Battery Management System). The creator reveals how the cells are connected and explains the process of dismantling, including close-ups of the BMS, cell ends, and bus bars. Challenges such as glued cells and a need for rewiring are discussed, with plans to repurpose the cells into a 14s configuration for future use.

Takeaways

• 🔋 The video showcases a teardown of a BYD 803 battery pack that the creator purchased and disassembled.
• 🧰 The lid of the battery pack was removed to reveal the internal layout and structure of the cells.
• 📏 The battery cells are arranged crossways across the car, demonstrating an efficient spatial configuration.
• 💧 The visible lines on top of the pack are refrigerant cooling channels running along the length of the vehicle.
• ⚙️ The Battery Management System (BMS) is spot-welded to the cells and monitors electrical and thermal parameters.
• 🔌 Each cell features pass-through connections allowing the system to access positive and negative terminals from opposite ends.
• 🧯 A small circuit board functions as a fusible link, transferring power safely between bus bars and other components.
• 🪛 The cooling plates are glued down tightly, making them difficult to remove without damaging the cells.
• 🧾 Close-up shots show both the top and bottom sides of the BMS board, with a mica insulation sheet applied for protection.
• ⚡ The cells are glued into the bottom of the case, so the creator plans to cut the bus bars and rewire the pack into a 14s configuration for future use.

Q & A

What is the main focus of the video described in the transcript?

The video focuses on disassembling a BYD 803 battery pack, showing its internal components, structure, and battery management system (BMS).

What does the creator first show after removing the lid of the BYD 803 battery?

After removing the lid, the creator shows the layout of all the cells inside the battery pack, including multiple views from different sides.

How are the battery cells arranged inside the BYD 803 pack?

The cells are arranged crossways across the car, meaning they run perpendicular to the vehicle’s length.

What are the visible lines on top of the battery pack, and what is their function?

The visible lines on top are cooling channels for the refrigerant that circulates back and forth along the length of the car to regulate temperature.

What is described about the Battery Management System (BMS)?

The BMS is spot-welded onto the cells and uses pass-through connections to pick up positive and negative terminals from the far end of the pack.

What is the purpose of the small circuit board found at the far end of the pack?

The small circuit board acts as a fusible link, transferring power from the terminal bus bar to the opposite side of the cells for safety and circuit protection.

Why did the creator stop removing the cooling plates from the pack?

The cooling plates were glued down tightly, and further removal risked damaging the battery cells, so the creator decided to stop the process.

What materials or components are shown after the BMS is removed?

After removing the BMS, the creator shows close-up shots of the board’s top and bottom sides, noting that the bottom is covered with a mica insulating sheet.

What challenge does the creator face with the cells in the battery pack?

The cells are glued into the bottom of the case, preventing their removal without damaging them, so the creator plans to modify the wiring instead.

What modification does the creator plan to make to the battery pack?

The creator plans to cut the bus bars and rewire the pack into a 14s configuration, which will better suit their project’s power requirements.

What future update does the creator promise at the end of the video?

The creator mentions that once the rewiring into the 14s configuration is complete, they will upload another video showing the results.

What is the overall tone or purpose of the video?

The video is educational and exploratory, intended to document the teardown process and share technical insights about the structure and components of a BYD 803 battery pack.