Negative pole piece, battery, battery pack and electric equipment
The invention relates to a negative pole piece, a battery, a battery pack and electric equipment. The negative pole piece comprises a negative current collector and a negative material layer, the negative material layer is arranged on the surface of the negative current collector, the negative mater...
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Main Authors | , |
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Format | Patent |
Language | Chinese English |
Published |
07.07.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a negative pole piece, a battery, a battery pack and electric equipment. The negative pole piece comprises a negative current collector and a negative material layer, the negative material layer is arranged on the surface of the negative current collector, the negative material layer comprises a first active material, the first active material comprises a first particle group and a second particle group, the compaction density of the first particle group is P1 after the first particle group is compacted under the pressure of 5 tons, when the compaction density of the second particle group is P2 after the second particle group is compacted under the pressure of 5 tons, the relational expression 1.0 < = P1/P2 < = 1.5 is satisfied; wherein when the volume percentage in the first particle group reaches 50%, the corresponding particle size value Dv50 meets the relational expression: 13 [mu] m < = Dv50 < = 20 [mu] m; when the volume percentage in the second particle group reaches 50%, the c |
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Bibliography: | Application Number: CN202310674022 |