Battery cell, battery module, battery pack, device using battery cell as power source, and assembling method of battery cell
The present disclosure provides a battery cell, a battery module, a battery pack, a device using the battery cell as a power source, and an assembling method of the battery cell, wherein the battery cell comprising an electrode assembly ( 20 ) and an insulating support plate ( 50 ), the electrode assembly ( 20 ) comprises a main body portion ( 22 ) and a tab ( 21 ) connected to the main body portion ( 22 ), the insulating support plate ( 50 ) comprises a first support portion ( 51 ) and a second support portion ( 52 ) connected to the first support portion ( 51 ), the first support portion ( 51 ) protrudes in a direction approaching the main body portion ( 22 ) relative to the second support portion ( 52 ) such that a first gap is formed between the second support portion ( 52 ) and the main body portion ( 22 ), and at least a portion of the tab ( 21 ) is located in the first gap. The first gap formed between the second support portion and the main body portion can accommodate at least a portion of the tab to effectively protect the tab, prevent the tab from being compressed, reduce damages to the tab, and increase the service life of the battery.
1. A battery cell, comprising:
an electrode assembly ( 20 ) comprising a main body portion ( 22 ) and a tab ( 21 ) connected to the main body portion ( 22 );
an insulating support plate ( 50 ) comprising a first support portion ( 51 ) and a second support portion ( 52 ) connected to the first support portion ( 51 ), the first support portion ( 51 ) protruding in a direction approaching the main body portion ( 22 ) relative to the second support portion ( 52 ) such that a first gap is formed between the second support portion ( 52 ) and the main body portion ( 22 ), and at least a portion of the tab ( 21 ) is located in the first gap;
a cover plate assembly ( 30 ) comprising electrode terminals ( 31 );
a connecting sheet ( 40 ) comprising a first connecting portion ( 41 ) connected to the tab ( 21 ) and a second connecting portion ( 42 ) connected to one of the electrode terminals ( 31 ) by welding; and
an insulating member ( 60 ) disposed between the insulating support plate ( 50 ) and the connecting sheet ( 40 ), covering a portion where the second connecting portion ( 42 ) is welded to the electrode terminal ( 31 ),
wherein both the insulating support plate ( 50 ) and the connecting sheet ( 40 ) abut against the insulating member ( 60 ), and
wherein the insulating support plate ( 50 ) further comprises a carrying portion ( 53 ) protruding in a direction approaching the connecting sheet ( 40 ) relative to the first support portion ( 51 ) such that a fourth groove ( 531 ) is formed on a side of the carrying portion ( 53 ) away from the cover plate assembly ( 30 ), and the carrying portion ( 53 ) and the connecting sheet ( 40 ) together limit a position of the insulating member ( 60 ), and the carrying portion ( 53 ) is arranged opposite to the corresponding electrode terminal ( 31 ).
2. The battery cell according to claim 1 , wherein the tab ( 21 ) comprises a first tab section ( 211 ) connected to the main body section ( 22 ) and a second tab section ( 212 ) located on a side of the first tab section ( 211 ) away from the main body portion ( 22 ), the first tab section ( 211 ) is located in the first gap.
3. The battery cell according to claim 2 , wherein the second tab section ( 212 ) is located on a side of the second support portion ( 52 ) away from the first tab section ( 211 ).
4. The battery cell according to claim 1 , wherein the first support portion ( 51 ) abuts against the main body portion ( 22 ).
5. The battery cell according to claim 1 , wherein the first support portion ( 51 ) and the second support portion ( 52 ) are both flat, and the first support portion ( 51 ) and the second support portion ( 51 ) are parallel to each other.
6. The battery cell according to claim 1 , wherein one or more second support portions ( 52 ) are provided on each of two sides of the first support portion ( 51 ).
7. The battery cell according to claim 6 , wherein each of two sides of the first support portion ( 51 ) is provided with two second support portions ( 52 ), and there is a second gap between the two second support portions ( 52 ) on the same side of the first support portion ( 51 ).
8. The battery cell according to claim 1 , further comprising a case ( 10 ) in which the electrode assembly ( 20 ) and the insulating support plate ( 50 ) are disposed, the case ( 10 ) has an opening ( 11 ), the cover plate assembly ( 30 ) is configured to seal the opening ( 11 ), the first support portion ( 51 ) is provided with a hook ( 54 ), and the cover plate assembly ( 30 ) is provided with a first groove ( 35 ), wherein the hook ( 54 ) is inserted into the first groove ( 35 ) to connect the insulating support plate ( 50 ) and the cover plate assembly ( 30 ).
9. The battery cell according to claim 8 , wherein the first support portion ( 51 ) is provided with a second groove ( 55 ), and the hook ( 54 ) is disposed in the second groove ( 55 ).
10. A battery module, comprising the battery cell according to claim 1 .
11. A battery pack, comprising the battery module according to claim 10 .
12. A device using a battery cell as a power source, the device comprising the battery cell according to claim 1 .
13. An assembly method of the battery cell according to claim 1 , comprising:
placing the insulating support plate ( 50 ) on one side of the main body portion ( 22 ) and placing the first support portion ( 51 ) closer to the main body portion ( 22 ) than the second support portion ( 52 ) to form a first gap between the second support portion ( 52 ) and the main body portion ( 22 ); and
folding the tab ( 21 ) to make at least a portion of the tab ( 21 ) located in the first gap.
14. The battery cell according to claim 1 , wherein the connecting sheet ( 40 ) is configured to electrically connect the tab ( 21 ) and the electrode terminal ( 31 ).