Power battery system composite material box cover and manufacturing method thereof

The invention discloses a power battery system composite material box cover and a manufacturing method thereof, the box cover comprises an electromagnetic shielding layer, an upper fiber felt layer, an upper surface felt layer, a lower surface felt layer and a lower fiber felt layer, and the upper surface felt layer, the upper fiber felt layer, the electromagnetic shielding layer, the lower fiber felt layer and the lower surface felt layer are sequentially laid from top to bottom. According to the invention, under the condition that the same thickness, weight, strength, price and other factors are guaranteed, due to the fact that the box cover is provided with the electromagnetic shielding layer, the Faraday cage effect is naturally formed after the box cover is combined with the box body (because the box body needs to be borne, the current box body is a metal piece); the EMC capacity of the whole battery system is further improved, even if the anti-electromagnetic interference of the BMS fails, the whole sys