Battery, battery module and electric vehicle
A technology for battery modules and electric vehicles, which is applied to battery components, batteries, secondary batteries, etc. It can solve the problems of electrolyte decomposition and high voltage, and achieve the goal of improving overcurrent capacity, increasing capacity, and reducing the difficulty of production process Effect
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Embodiment approach 1
[0044] Such as Figure 1~2As shown, a battery includes several battery cells 1, at least one side of the battery cells 1 is provided with a tab 2, adjacent battery cells 1 are connected in parallel through the tabs 2 to form a battery pack 3, and a pole The number of sides of tabs 2 is X, 1≤X≤4, the number of tabs 2 is Y, 1≤Y≤100, the number X of sides provided with tabs 2 and the number Y of tabs 2 satisfy the relationship Formula: 0.01≤X / Y≤4. When the cells are connected in series, the voltage is too high, causing the electrolyte to decompose. Therefore, connecting several cells 1 in parallel to form a cell group 3 can not only increase the capacity of the battery while maintaining the same voltage, but also It can avoid the situation that the battery cell 1 is connected in series to cause the voltage to be too high and cause the electrolyte to decompose; at the same time, only a plurality of battery cells 1 need to be connected in parallel to simplify the production proces...
Embodiment approach 2
[0054] The difference from Embodiment 1 is that tabs 2 are provided on adjacent two sides of the battery cell 1 . Such as Figure 5-6 As shown, tabs 2 are provided on the adjacent two sides of the battery core 1, and four such battery cores 1 can form a ring-shaped battery core group 3 along the circular direction; or this kind of battery core 1 is placed in the embodiment The two ends of the cell group 3 of the first embodiment, and the tabs 2 on one side of the cell 1 are connected to the total electrode, so that the total electrodes 4 of the cell group 3 in the first embodiment face the same direction, which is convenient for battery modules The actual structure of the group, changing the direction of the total electrode 4, helps to expand the applicable surface of the battery; it is also possible to connect the tabs 2 on one side of the battery 1 to other batteries 1, so that the linear battery pack 3 The battery core group 3 that becomes ring-shaped helps to improve the ...
Embodiment approach 3
[0057] The difference from Embodiment 1 is that in this embodiment, the number X of the side portions provided with tabs 2 and the number Y of the tabs 2 satisfy the relational expression: 0.03≤X / Y≤3, and the side portions provided with tabs 2 The quantity X is 3. Such as Figure 7-9 As shown, in this embodiment, the tabs 2 on both sides of the battery cell 1 can be used to connect the other two battery cells 1 respectively, and the tab 2 on the other side can be used to connect to other battery cells 1, or as a general electrode 4. Alternatively, the batteries 1 are placed at both ends of the battery pack 3 in Embodiment 1 to form a parallel combination of various batteries, which helps to improve the flexibility of the battery structure.
[0058] Other structures are the same as those in Embodiment 1, and will not be repeated here.
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