Pole piece for laminated lithium ion battery and laminated lithium ion battery
A lithium-ion battery and lamination technology, which is applied in the direction of secondary batteries, battery components, circuits, etc., can solve the problems of unfavorable continuous discharge of large current, uneven heat dissipation, and easy inflation of the battery, so as to improve heat generation, Effect of increasing area and reducing internal resistance
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Example Embodiment
[0064] Example 1:
[0065] image 3 A schematic diagram of the front view structure of a pole piece for a laminated lithium ion battery provided in this embodiment;
[0066] Figure 4 for image 3 Schematic diagram of the A-A section structure.
[0067] See image 3 , 4 As shown, the pole piece for a laminated lithium ion battery provided in this embodiment is composed of a current collector foil and an electrode material layer 402 coated on the surface of the current collector foil 401. Its specific structure is as follows:
[0068] On the first width end edge of the current collector foil 401, a first tab welding site 301 extends and protrudes in a direction orthogonal to the first width end edge.
[0069] On the second width end side opposite to the first width end side, a second tab welding location 302 extends and protrudes along the orthogonal direction to the second width end side.
[0070] On the pole piece, the positions of the first tab welding position 301 and the second tab ...
Example Embodiment
[0088] Example 2:
[0089] During the research of the present invention, the inventor found that in order to further improve the performance of the laminated lithium-ion battery, the image 3 , 4 The pole piece shown has the following further improvements:
[0090] Image 6 This embodiment provides a schematic diagram of another improved pole piece structure.
[0091] See Image 6 As shown, in this embodiment, for each pole piece (positive electrode and / or negative electrode), the tab on the current collector foil of the pole piece closest to the outer end of the width end of the pole piece The corners of the outer edges of the welding positions 6041 and 6042 are all set as arc transition portions 601, and each arc transition portion 601 is tangent to the width end edge 602 and the longitudinal end edge 603 of the current collector foil, respectively.
[0092] Wherein, since the tab welding positions 6041, 6042 of the pole pieces extend and protrude along the width end 602 of the curr...
Example Embodiment
[0119] Example 3:
[0120] Figure 8 This embodiment provides a schematic structural diagram of a pole piece for a laminated lithium ion battery.
[0121] Picture 9 Use for this example Figure 8 The positive electrode sheet and the negative electrode sheet of the structure shown are a schematic diagram of the laminated structure of a laminated lithium ion battery.
[0122] See Figure 8 , 9 As shown, the main differences between this embodiment and Embodiment 1 are as follows:
[0123] The position of the welding positions of the two pole ears on the two opposite width ends of the pole piece of this embodiment has changed:
[0124] In this embodiment, there are two pole ear welding positions extending and protruding on the current collector foil of the pole piece:
[0125] The first tab welding position 8011 extends and protrudes on the left side of the first width end edge of the current collector foil,
[0126] The second tab welding position 8012 also extends and protrudes on the le...
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