Zeekr 007 Gold Brick Battery Disassembly

From the product nameplate below the battery pack explosion-proof valve, we can see that this battery pack uses the LFP chemical system, with a nominal voltage of 610V, a nominal energy of 75.6 kWh, and a single cell capacity of 124Ah.

It can be seen that the cells are divided into two rows, similar to the arrangement of the Fudi battery pack of Xiaomi SU7 . The voltage and current signal acquisition boards of the cells are distributed on both sides of the cell array, and are about 7 cm away from the lower shell. They are used as a crumple zone to protect the cells from being squeezed when the vehicle collides from the side. The function is similar to the design of the Cybertruck battery pack .

The battery pack cover is made of steel and is connected to the box body by rivets.

The total positive and negative terminals of the battery pack are marked in the figure below, and all 196 cells are connected in series

.The width of the main line copper busbar is about 23 mm, and the thickness of the end post is about 3 mm.

The surface of the mainboard of the battery management system is coated with waterproof glue to ensure that the battery can still work normally after being soaked in water. I am not familiar with the manufacturer, and friends who know are welcome to help answer in the comment area

The current and voltage sensors and BMU come from the same manufacturer, and the internal mainboard surface is waterproofed.

The design of the current sensor is simpler than the common solutions on the market.

Both the main relay and pre-charge relay are from Hongfa, and the bottom of the main relay is coated with thermal conductive glue.

The fast charging module contains an active fuse, a passive fuse, and two relays, which are integrated by embedding electrical connections inside high-temperature and high-pressure resistant plastic. The bottom of the two relays is also coated with thermal conductive glue to facilitate heat dissipation during high-current charging.

The fuse specification for fast charging is 25kV/550A.

Then let's take a look at the battery cell design. The total length of the battery cell is 510 mm, the thickness is about 16.35 mm, and the width is about 120.36 mm.

The pole and adapter are connected by laser welding , and the pole length is about 60.3 mm.

The weight of a single battery cell is about 2.27 kg, the thickness of the aluminum shell is about 0.37 mm, and the gold insulating film is about 0.1 mm.

The picture below shows the internal structure of the battery cell, where an obvious stacked design can be seen.

After cutting off the pole ear, you can see that the cover adopts a double-pole ear design, which can improve the current capacity under high current, reduce the temperature rise rate during fast charging, and reduce the burden of thermal management. The effective welding length of the pole is about 20 mm, and the rivet spacing is about 39 mm.

The length of the positive electrode tab is about 59 mm. The battery cell injection hole is on the negative electrode cover, and the explosion-proof valve is on the positive electrode cover.

The total length of the battery cell stack is 489 mm, the width is approximately 117 mm, and the thickness is approximately 15 mm.

After taking out the negative electrode, you can see that the surface is golden, which means that the battery cell is still charged. You can also clearly see wrinkles on the surface of the electrode, which may be due to incomplete stress release during the manufacturing process of the battery cell.

The negative electrode plate is approximately 116 mm wide, 487 mm long , and 61 mm wide.

The negative electrode plate is approximately 113 mm wide, 483 mm long , and the tab width is approximately 61 mm.

The above is a partial introduction to the disassembly of the Zeekr 007 gold brick battery. I hope it will be helpful to those who are interested.