Battery cell, device for manufacturing battery cell, and method for manufacturing battery cell

Abstract

The battery cell according to one embodiment of the present disclosure may comprise: a housing comprising an accommodating space; the cover plate is connected with the shell and comprises a first terminal and a second terminal; and an electrode assembly assembly disposed in the accommodation space and connected with the first terminal and the second terminal, the electrode assembly assembly may include: at least one electrode assembly including at least one negative plate and at least one positive plate; a first current collection member including a first opening region from which at least one positive electrode uncoated region, which is not coated with the active material, in the at least one positive electrode plate is led out, and connected to the first terminal; and a second current collection member including a second opening region from which at least one negative electrode uncoated region, which is not coated with the active material, in the at least one negative electrode plate is led out, and at least one positive electrode uncoated region, which can be bent and is in contact with the first current collection member, at least one negative electrode uncoated region may be bent and in contact with the second current collector member.

Description

Technical Field

[0001] This disclosure relates to a battery cell, an apparatus for manufacturing a battery cell, and a method for manufacturing a battery cell. Background Technology

[0002] Batteries are widely used in small electronic devices such as mobile phones and laptops, as well as medium and large mechanical devices such as electric vehicles (EVs) and energy storage devices, and have the advantages of being rechargeable and reusable.

[0003] Battery cells are manufactured by housing electrode assemblies, including positive and negative plates, in a housing of various shapes, such as pouch, prism, or cylinder, selected according to the intended use, and then injecting electrolyte.

[0004] The terminals or leads of the battery cell can be exposed outside the casing. The terminals or leads can be electrically connected to the positive and negative plates.

[0005] The interior of the housing may be provided with a structure for connecting the positive plate and the negative plate to the terminal or lead piece, respectively. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] According to one aspect of this disclosure, a battery cell with improved quality and manufacturing efficiency, a battery cell manufacturing apparatus, and a battery cell manufacturing method are provided.

[0008] Furthermore, this disclosure can be widely applied to green technology fields such as solar power generation and wind power generation.

[0009] Furthermore, this disclosure can be applied to environmentally friendly devices such as eco-friendly electric vehicles and hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0010] (II) Technical Solution

[0011] A battery cell according to an embodiment of the present disclosure may include: a housing including a receiving space; a cover plate connected to the housing and including a first terminal and a second terminal; and an electrode assembly disposed in the receiving space and connected to the first terminal and the second terminal, the electrode assembly comprising: at least one electrode assembly including at least one negative electrode plate and at least one positive electrode plate; a first current collector including a first opening region and connected to the first terminal, at least one uncoated positive electrode region of the at least one positive electrode plate extending from the first opening region; and a second current collector including a second opening region and connected to the second terminal, at least one uncoated negative electrode region of the at least one negative electrode plate extending from the second opening region, the at least one uncoated positive electrode region being bendable and contacting the first current collector, and the at least one uncoated negative electrode region being bendable and contacting the second current collector.

[0012] In one embodiment, the at least one electrode assembly may include multiple electrode assemblies, the first current collector may include multiple first opening regions, and the second current collector may include multiple second opening regions.

[0013] In one embodiment, the uncoated positive electrode regions of multiple electrode assemblies can be led out from multiple first opening regions, and the uncoated negative electrode regions of multiple electrode assemblies can be led out from multiple second opening regions.

[0014] In one embodiment, the plurality of electrode assemblies may be stacked in the same direction as the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate, the plurality of first opening regions may be staggered from each other in the stacking direction, and the plurality of second opening regions may be staggered from each other in the stacking direction.

[0015] In one embodiment, the at least one electrode assembly may include multiple electrode assemblies, each of which may include multiple positive plates and multiple negative plates. Multiple uncoated positive electrode regions may overlap with each other and be connected to the first current collector, and multiple uncoated negative electrode regions may overlap with each other and be connected to the second current collector.

[0016] In one embodiment, the ends of the plurality of uncoated positive electrode regions and the ends of the plurality of uncoated negative electrode regions may be bent toward the first current collector and the second current collector, and the ends of the plurality of uncoated positive electrode regions and the plurality of uncoated negative electrode regions may extend in a direction parallel to the stacking direction of the plurality of positive electrode plates and the plurality of negative electrode plates.

[0017] In one embodiment, the first opening region may be a notch or a hole, and the second opening region may be a notch or a hole.

[0018] In one embodiment, the at least one uncoated positive electrode region can be soldered to the first current collector, the at least one uncoated negative electrode region can be soldered to the second current collector, and the solder lines formed in the at least one uncoated positive electrode region and the solder lines formed in the at least one uncoated negative electrode region can be parallel to the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate.

[0019] In one embodiment, a plurality of uncoated positive electrode regions extending from one first opening region and a plurality of uncoated positive electrode regions extending from another first opening region can be bent in different directions, and a plurality of uncoated negative electrode regions extending from one second opening region and a plurality of uncoated negative electrode regions extending from another second opening region can be bent in different directions.

[0020] In one embodiment, in the thickness direction section of the at least one negative electrode plate or the at least one positive electrode plate, the long sides of the first opening region and the second opening region may be arranged perpendicularly to a straight line extending parallel to the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate.

[0021] In one embodiment, the outlines of the first opening region and the second opening region may include a plurality of straight lines in the thickness direction section of the at least one negative electrode plate or the at least one positive electrode plate.

[0022] On the other hand, another aspect of this disclosure provides an apparatus for manufacturing battery cells.

[0023] In a battery cell manufacturing apparatus according to an embodiment of the present disclosure, the battery cell includes an electrode assembly assembly comprising: at least one electrode assembly including at least one negative electrode plate and at least one positive electrode plate; a first current collector including a first opening region and connected to a first terminal of a cover plate, wherein at least one uncoated positive electrode region of the at least one positive electrode plate is led out from the first opening region; and a second current collector including a second opening region and connected to a second terminal of the cover plate, wherein at least one uncoated negative electrode region of the at least one negative electrode plate is led out from the second opening region. The battery cell manufacturing apparatus may include: a moving member for moving the first current collector and the second current collector; a clamping member for clamping the at least one uncoated positive electrode region and the at least one uncoated negative electrode region; a mask member for pressurizing and bending the at least one uncoated positive electrode region and the at least one uncoated negative electrode region; and a welding member for welding the at least one uncoated positive electrode region and the at least one uncoated negative electrode region to the first current collector and the second current collector.

[0024] In one embodiment, the clamping component may include: a first clamping arm facing one side of the at least one positive electrode uncoated area and one side of the at least one negative electrode uncoated area; a second clamping arm spaced apart from the first clamping arm in the thickness direction of the at least one positive electrode uncoated area; and an interval adjustment actuator connected to the first clamping arm and the second clamping arm for moving at least one of the first clamping arm and the second clamping arm.

[0025] In one embodiment, the welding component can be welded along the movement direction of the mask component.

[0026] In one embodiment, the welding component may provide a welding heat source at a location that does not overlap with the first opening region and the second opening region.

[0027] On the other hand, a method for manufacturing a battery cell can be provided according to another aspect of this disclosure.

[0028] A method for manufacturing a battery cell according to an embodiment of the present disclosure may include: a preparation step of preparing at least one electrode assembly, a first current collector, and a second current collector, the electrode assembly including at least one negative electrode plate and at least one positive electrode plate, the first current collector including a first opening region and connected to a first terminal of a cover plate, at least one uncoated positive electrode region of the at least one positive electrode plate without active material extending from the first opening region, the second current collector including a second opening region and connected to a second terminal of the cover plate, at least one uncoated negative electrode region of the at least one negative electrode plate without active material extending from the second opening region; a lead-out step of leading the at least one uncoated positive electrode region from the first opening region and leading the at least one uncoated negative electrode region from the second opening region; a bending step of bending the at least one uncoated positive electrode region and bending the at least one uncoated negative electrode region; and a welding step of welding the at least one uncoated positive electrode region to the first current collector and welding the at least one uncoated negative electrode region to the second current collector.

[0029] In one embodiment, during the bending step, the end of the at least one uncoated positive electrode region may be bent toward the first current collector, and the end of the at least one uncoated negative electrode region may be bent toward the second current collector.

[0030] In one embodiment, laser welding may be performed during the welding step.

[0031] In one embodiment, during the bending step, the at least one uncoated positive electrode area and the at least one uncoated negative electrode area can be rotated around an axis perpendicular to the thickness direction of the at least one negative electrode plate and the thickness direction of the at least one positive electrode plate, in order to bend the at least one uncoated positive electrode area and the at least one uncoated negative electrode area.

[0032] In one embodiment, the welding step may be performed in a direction parallel to the thickness direction of the at least one negative electrode plate and the thickness direction of the at least one positive electrode plate.

[0033] (III) Beneficial Effects

[0034] According to one aspect of this disclosure, a battery cell with improved quality and manufacturing efficiency, a battery cell manufacturing apparatus, and a battery cell manufacturing method can be provided.

[0035] Furthermore, this disclosure can be widely applied to green technology fields such as solar power generation and wind power generation.

[0036] Furthermore, this disclosure can be applied to environmentally friendly devices such as eco-friendly electric vehicles and hybrid vehicles that prevent climate change by suppressing air pollution and greenhouse gas emissions. Attached Figure Description

[0037] Figure 1 This is a schematic exploded perspective view of a battery cell according to an embodiment of the present disclosure.

[0038] Figure 2 This is a schematic exploded perspective view of an electrode assembly according to an embodiment of the present disclosure.

[0039] Figure 3 This is a schematic exploded perspective view of a battery cell according to another embodiment of the present disclosure.

[0040] Figure 4 This is a schematic perspective view of an electrode assembly according to another embodiment of the present disclosure.

[0041] Figure 5 This is a schematic exploded perspective view of a battery cell according to another embodiment of the present disclosure.

[0042] Figure 6 This is a schematic exploded perspective view of an electrode assembly according to another embodiment of the present disclosure.

[0043] Figure 7 This is a schematic diagram of the connection state of the current collector and electrode assembly according to another embodiment of the present disclosure.

[0044] Figure 8 This is a schematic diagram of the connection state of the current collector and electrode assembly according to another embodiment of the present disclosure.

[0045] Figure 9 This is a schematic diagram of the connection state of the current collector and electrode assembly according to another embodiment of the present disclosure.

[0046] Figure 10 This is a schematic diagram of a battery cell manufacturing apparatus according to an embodiment of the present disclosure.

[0047] Figure 11 This is a schematic operational state diagram of a clamp component according to an embodiment of the present disclosure.

[0048] Figure 12 This is a schematic diagram of a battery cell manufacturing apparatus according to another embodiment of the present disclosure.

[0049] Figure 13 yes Figure 12 A schematic diagram of the operating status of a battery cell manufacturing apparatus.

[0050] Figure 14 yes Figure 12 and Figure 13 A schematic diagram of the operating status of a battery cell manufacturing apparatus.

[0051] Figure 15 yes Figures 12 to 14 A schematic diagram of the operating status of a battery cell manufacturing apparatus.

[0052] Figure 16 This is a schematic diagram of a method for manufacturing a battery cell according to an embodiment of the present disclosure.

[0053] Explanation of reference numerals in the attached figures:

[0054] 110: Shell 120: Cover

[0055] 130: First collector component; 131: First opening area

[0056] 140: Second collector component; 141: Second opening area

[0057] 150: Electrode assembly 250: Electrode assembly

[0058] 300: Cell manufacturing apparatus; 310: Moving parts

[0059] 320: Fixture component; 330: Mask component

[0060] 340: Welded components Detailed Implementation

[0061] To facilitate understanding of the embodiments described in this disclosure, components referred to by the same reference numerals in the accompanying drawings are the same components. Some components in the drawings may be exaggerated, omitted, or shown schematically, and the dimensions of each component do not necessarily reflect their actual dimensions.

[0062] Furthermore, for the sake of clarity, descriptions of common components and techniques in the prior art have been omitted. This disclosure will now be described in detail with reference to the accompanying drawings.

[0063] In the following diagram, the X-axis represents the width of the battery cell 100, the Y-axis represents the thickness of the battery cell 100, and the Z-axis represents the height of the battery cell 100. However, these axes are arbitrarily set for ease of understanding and can be changed.

[0064] Figure 1 This is a schematic exploded perspective view of a battery cell 100 according to an embodiment of the present disclosure. Figure 2 This is a schematic exploded perspective view of an electrode assembly 250 according to an embodiment of the present disclosure. Figure 2 The diagram shows a positive electrode 251, a negative electrode 254, and a separator 257.

[0065] like Figure 1 and Figure 2 As shown, a battery cell 100 according to an embodiment of the present disclosure includes: a housing 110 including a receiving space 111; a cover plate 120 connected to the housing 110 and including a first terminal 121 and a second terminal 122; and an electrode assembly 150 disposed in the receiving space 111 and connected to the first terminal 121 and the second terminal 122. The electrode assembly 150 includes: at least one electrode assembly 250 including at least one negative electrode plate 254 and at least one positive electrode plate 251; a first current collector 130 including a first opening region 131 and connected to the first terminal 121, wherein at least one uncoated positive electrode region 252 of the at least one positive electrode plate 251 without active material is led out from the first opening region 131; and a second current collector 140 including a second opening region 141 and connected to the second terminal 122, wherein at least one uncoated negative electrode region 255 of the at least one negative electrode plate 254 without active material is led out from the second opening region 141. Furthermore, the at least one uncoated positive electrode region 252 can be bent and contact the first current collector 130, and the at least one uncoated negative electrode region 255 can be bent and contact the second current collector 140.

[0066] In one embodiment, cell 100 may be a lithium-ion cell 100.

[0067] The housing 110 can have various shapes, such as prism, ellipse, or circle, with at least one curved portion at the edge. For example, the cross-sectional shape (XY plane) of the housing 110 in the thickness direction of the cell 100 can be polygonal. Furthermore, for example, the cross-sectional shape (XY plane) of the housing 110 in the thickness direction of the cell 100 can be rectangular.

[0068] In one embodiment, the housing 110 may have a can (CAN) shape and be made of a metallic material including aluminum, aluminum alloy, stainless steel, etc., but this disclosure does not limit its material.

[0069] The housing 110 may include a receiving space 111. The housing 110 may include a housing opening region 112 formed by an end opening in the +Z direction of the housing 110. The receiving space 111 and the housing opening region 112 may be connected.

[0070] The electrode assembly 150 may be disposed in the receiving space 111. The electrode assembly 150 may include at least one electrode assembly 250, a first current collector 130, and a second current collector 140.

[0071] The electrode assembly 250 may include at least one negative electrode plate 254, at least one positive electrode plate 251, and at least one diaphragm 257 inserted between the at least one negative electrode plate 254 and the at least one positive electrode plate 251.

[0072] The electrode assembly 250 may have a diaphragm 257 inserted between the negative electrode plate 254 and the positive electrode plate 251 to isolate the negative electrode plate 254 and the positive electrode plate 251 through the diaphragm 257.

[0073] Furthermore, in one embodiment, the electrode assembly 250 may include a plurality of negative electrode plates 254 and a plurality of positive electrode plates 251. In this case, the electrode assembly 250 may be manufactured by continuously supplying a separator 257 and alternately stacking (or arranging) negative electrode plates 254 and positive electrode plates 251 cut to a predetermined size on the separator 257.

[0074] Furthermore, in one embodiment, the electrode assembly 250 can also be manufactured by winding at least one negative electrode plate 254 and at least one positive electrode plate 251. However, this disclosure does not limit the method of manufacturing the electrode assembly 250.

[0075] The electrode assembly 250 can be housed together with the electrolyte in the housing 110's receiving space 111. The housing 110's receiving space 111 can be covered by a cover plate 120, and the housing 110 can be sealed by the cover plate 120.

[0076] In one embodiment, the positive electrode plate 251 may include a region coated with a positive electrode active material, namely the positive electrode active material region 253, and a positive electrode uncoated region 252 without a positive electrode active material. The negative electrode plate 254 may include a region coated with a negative electrode active material, namely the negative electrode active material region 256, and a negative electrode uncoated region 255 without a negative electrode active material.

[0077] The positive electrode active material can be provided in the form of a positive electrode mixture. For example, the positive electrode mixture can be in the form of a slurry formed by mixing and stirring the positive electrode active material, binder, conductive agent, dispersant, etc.

[0078] The negative electrode active material can be provided in the form of a negative electrode mixture. The negative electrode mixture can be in the form of a slurry formed by mixing and stirring the negative electrode active material, binder, conductive agent, dispersant, etc.

[0079] In one embodiment, the positive electrode plate 251 may be made of a material comprising aluminum, stainless steel, nickel, titanium, copper, or alloys thereof.

[0080] In addition, in one embodiment, the negative electrode plate 254 may be made of a material comprising copper, gold, stainless steel, nickel, aluminum, titanium or alloys thereof.

[0081] The cover plate 120 may include a first terminal 121, a second terminal 122, a venting area 123, and an electrolyte injection port 124. The electrolyte injection port 124 may be sealed by a sealing ball or the like after the electrolyte injection is completed.

[0082] The exhaust region 123 may consist solely of a cut line formed on the cover plate 120. The cut line may be formed by cutting or slicing at least a portion of the exhaust region 123 with a cutting blade. The exhaust region 123 may rupture upon pressure rise in the receiving space 111.

[0083] In one embodiment, the contact area between the cover plate 120 and the housing 110 may be provided with a separate insulating material, and the inner surface of the housing 110 may also be provided with a separate insulating material, but this disclosure does not impose any limitations.

[0084] The first terminal 121 can be electrically connected to the first current collector 130, and the second terminal 122 can be electrically connected to the second current collector 140. An insulating material can be provided between the first terminal 121 and the cover plate 120, and an insulating material can also be provided between the second terminal 122 and the cover plate 120. The insulating material can be a material with electrical insulating properties.

[0085] The first current collector 130 and the second current collector 140 can be made of conductive materials. The first current collector 130 can be connected to the first terminal 121 via the first terminal plate 125, and the second current collector 140 can be connected to the second terminal 122 via the second terminal plate 126.

[0086] The first current collector 130 and the second current collector 140 can be disposed on the side of the electrode assembly 250 or the housing 110, and can face the uncoated positive electrode area 252 and the uncoated negative electrode area 255, respectively. The first current collector 130 and the second current collector 140 can be disposed perpendicularly to or intersecting with the cover plate 120.

[0087] The first terminal plate 125 and the second terminal plate 126 may be made of conductive materials. The first terminal plate 125 and the second terminal plate 126 may each include a first extension 127 and a second extension 128.

[0088] The first extension 127 may face the side of the electrode assembly 250 or the housing 110, and may also face the first current collector 130 and the second current collector 140. The second extension 128 may be bent from the first extension 127 and may be arranged parallel to the cover plate 120. The first extension 127 and the second extension 128 may be perpendicular to each other or intersect each other.

[0089] The first current collector 130 may include a first opening region 131, which is formed on a surface parallel to the side of the electrode assembly 250 or the side of the housing 110 (a surface parallel to the YZ plane). The second current collector 140 may include a second opening region 141, which is formed on a surface parallel to the side of the electrode assembly 250 or the side of the housing 110 (a surface parallel to the YZ plane). The first opening region 131 and the second opening region 141 may be parallel to each other.

[0090] The uncoated positive electrode area 252 of the positive electrode plate 251 can pass through the first opening area 131, and the uncoated negative electrode area 255 of the negative electrode plate 254 can pass through the second opening area 141.

[0091] The uncoated positive electrode region 252 can pass through the first opening region 131 and bend to contact the first current collector 130. Similarly, the uncoated negative electrode region 255 can pass through the second opening region 141 and bend to contact the second current collector 140.

[0092] In one embodiment, the positive uncoated region 252 can be led out from the electrode assembly 250 in the +X direction, and the negative uncoated region 255 can be led out from the electrode assembly 250 in the -X direction. The positive uncoated region 252 and the negative uncoated region 255 can be spaced apart from each other.

[0093] In one embodiment, the electrode assembly 250 may be a bidirectional electrode assembly 250. The direction in which the uncoated positive electrode region 252 extends from the positive electrode plate 251 and the direction in which the uncoated negative electrode region 255 extends from the negative electrode plate 254 in the bidirectional electrode assembly 250 may be different. That is, in the electrode assembly 250, when the positive electrode plate 251 and the negative electrode plate 254 are stacked along the thickness direction of the positive electrode plate 251 or the thickness direction of the negative electrode plate 254, the uncoated positive electrode region 252 and the uncoated negative electrode region 255 are staggered.

[0094] According to the bidirectional electrode assembly 250, the positive and negative active materials can be used evenly during the charging and discharging of the cell 100, and the heat generation of the cell 100 can be minimized.

[0095] The bidirectional electrode assembly 250 can be electrically connected to the first terminal 121 and the second terminal 122 via the first current collector 130 and the second current collector 140. The electrode assembly 250 can be connected to the first terminal 121 and the second terminal 122 without unnecessarily increasing the size of the battery cell 100 via the first current collector 130 and the second current collector 140. Therefore, the quality of the battery cell 100 can be improved, and manufacturing efficiency can be increased.

[0096] on the other hand, Figure 2 The electrode assembly 250 shown has a configuration in which the positive electrode plate 251 and the negative electrode plate 254 are formed and wound relatively long in the longitudinal direction (X direction) of the positive electrode plate 251 and the negative electrode plate 254, or has a configuration in which the positive electrode plate 251 and the negative electrode plate 254 are stacked in the thickness direction (Y direction). However, this disclosure does not limit whether the electrode assembly 250 is wound or stacked.

[0097] Figure 3 This is a schematic exploded perspective view of a battery cell 100 according to another embodiment of the present disclosure. Figure 4 This is a schematic perspective view of an electrode assembly 250 according to another embodiment of the present disclosure. Figure 4 The figure shows an electrode assembly 250 having multiple positive plates 251 and multiple negative plates 254.

[0098] like Figure 3 and Figure 4 As shown, in one embodiment of this disclosure, the electrode assembly 250 may include a plurality of positive electrode plates 251 and a plurality of negative electrode plates 254. In this case, a separator 257 may be disposed between a positive electrode plate 251 and a negative electrode plate 254.

[0099] In one embodiment, a plurality of negative electrode plates 254 and a plurality of positive electrode plates 251 may be stacked in the thickness direction (Y direction) of the cell 100 or the thickness direction (Y direction) of the casing 110. In this case, a separator 257 may be provided between the negative electrode plates 254 and the positive electrode plates 251.

[0100] When the electrode assembly 250 is a wound type, multiple negative electrode plates 254 and multiple positive electrode plates 251 can be wound and housed in the housing 110. On the thickness direction section (XY plane) of the cell 100, the positive electrode plates 251 and negative electrode plates 254 can be stacked. At this time, a separator 257 can be provided between the negative electrode plates 254 and the positive electrode plates 251.

[0101] Multiple uncoated positive electrode areas 252 can bend backward through the first opening area 131 toward the first collector component 130 and come into contact with the first collector component 130.

[0102] Multiple uncoated negative electrode areas 255 can also bend through the second opening area 141 toward the second collector component 140 and come into contact with the second collector component 140.

[0103] For example, the uncoated positive electrode region 252 and the uncoated negative electrode region 255 can be welded to the first current collector 130 and the second current collector 140, respectively.

[0104] Therefore, the process of welding multiple uncoated positive electrode regions 252 can be omitted, and the process of welding multiple uncoated negative electrode regions 255 can also be omitted. For example, there may be no ultrasonic welding area in the multiple uncoated positive electrode regions 252, and there may be no ultrasonic welding area in the multiple uncoated negative electrode regions 255. Furthermore, the battery cell 100 according to this disclosure may not have areas for pre-welding the multiple uncoated positive electrode regions 252 and areas for pre-welding the multiple uncoated negative electrode regions 255.

[0105] Multiple uncoated positive electrode areas 252 can be directly soldered to the first current collector 130, and multiple uncoated negative electrode areas 255 can be directly soldered to the second current collector 140. Therefore, the manufacturing efficiency of the battery cell 100 can be improved.

[0106] like Figure 4 As shown, in one embodiment of this disclosure, at least one electrode assembly 250 may include a plurality of electrode assemblies 250.

[0107] In one embodiment, a plurality of electrode assemblies 250 may be stacked in the same direction as the stacking direction (Y direction) of at least one negative electrode plate 254 and at least one positive electrode plate 251.

[0108] In one embodiment, the plurality of electrode assemblies 250 may include a first electrode assembly 250a and a second electrode assembly 250b. The first electrode assembly 250a and the second electrode assembly 250b may be stacked along the thickness direction (Y direction) of the cell 100.

[0109] The outer surface of the first electrode assembly 250a can be wrapped by the diaphragm 257, and the outer surface of the second electrode assembly 250b can also be wrapped by the diaphragm 257. The diaphragm 257 can be fixed by tape or the like.

[0110] The first electrode assembly 250a and the second electrode assembly 250b are stacked in the receiving space 111 of the housing 110, and the diaphragm 257 of the first electrode assembly 250a and the diaphragm 257 of the second electrode assembly 250b are in contact with each other.

[0111] For example, in the height direction section (XZ plane) of the cell 100, a plurality of positive electrode uncoated areas 252 of the first electrode assembly 250a and a plurality of positive electrode uncoated areas 252 of the second electrode assembly 250b can be led out from one side edge of the first electrode assembly 250a and one side edge of the second electrode assembly 250b.

[0112] Furthermore, on the height-direction cross section (XZ plane) of the cell 100, a plurality of uncoated negative electrode areas 255 of the first electrode assembly 250a and a plurality of uncoated negative electrode areas 255 of the second electrode assembly 250b can be extended from the other side edge of the first electrode assembly 250a and the other side edge of the second electrode assembly 250b.

[0113] At this time, the plurality of positive electrode uncoated areas 252 and the plurality of negative electrode uncoated areas 255 of the first electrode assembly 250a can be separated from each other in the width direction (X direction) of the cell 100, and the plurality of positive electrode uncoated areas 252 and the plurality of negative electrode uncoated areas 255 of the second electrode assembly 250b can also be separated from each other in the width direction (X direction) of the cell 100.

[0114] Furthermore, in one embodiment, at one side edge of the first electrode assembly 250a and one side edge of the second electrode assembly 250b, a plurality of uncoated positive electrode regions 252 of the first electrode assembly 250a and a plurality of uncoated positive electrode regions 252 of the second electrode assembly 250b can be spaced apart from each other. For example, the plurality of uncoated positive electrode regions 252 of the first electrode assembly 250a and a plurality of uncoated positive electrode regions 252 of the second electrode assembly 250b can be spaced apart from each other in at least one of the thickness direction (Y direction) and the height direction (Z direction) of the electrode assembly 250. By the same principle, this also applies to a plurality of uncoated negative electrode regions 255 of the first electrode assembly 250a and a plurality of uncoated negative electrode regions 255 of the second electrode assembly 250b.

[0115] When multiple electrode assemblies 250 are provided, the first current collector 130 may include multiple first opening regions 131, and the second current collector 140 may include multiple second opening regions 141. The number of multiple first opening regions 131 and the number of multiple second opening regions 141 may be the same as the number of electrode assemblies 250.

[0116] In one embodiment, a plurality of first opening regions 131 may be spaced apart from each other, and a plurality of second opening regions 141 may also be spaced apart from each other. The plurality of first opening regions 131 may be positioned facing a plurality of uncoated positive electrode regions 252 of the first electrode assembly 250a and a plurality of uncoated positive electrode regions 252 of the second electrode assembly 250b, and the plurality of second opening regions 141 may be positioned facing a plurality of uncoated negative electrode regions 255 of the first electrode assembly 250a and a plurality of uncoated negative electrode regions 255 of the second electrode assembly 250b.

[0117] Multiple uncoated positive electrode regions 252 can pass through multiple first opening regions 131, and multiple uncoated negative electrode regions 255 can pass through multiple second opening regions 141.

[0118] Figure 5 This is a schematic exploded perspective view of a battery cell 100 according to another embodiment of the present disclosure.

[0119] like Figure 5 As shown, in one embodiment of this disclosure, a plurality of first opening regions 131 may be formed in the first current collector 130, and a plurality of second opening regions 141 may be formed in the second current collector 140.

[0120] In one embodiment, the positive uncoated regions 252 of the plurality of electrode assemblies 250 can be led out from the plurality of first opening regions 131, and the negative uncoated regions 255 of the plurality of electrode assemblies 250 can be led out from the plurality of second opening regions 141.

[0121] For example, the uncoated positive electrode region 252 of the first electrode assembly 250a can be led out from a first opening region 131 and then bent. The bent uncoated positive electrode region 252 can contact the first current collector 130.

[0122] The uncoated positive electrode region 252 of the second electrode assembly 250b can be led out from another first opening region 131 and bent. The bent uncoated positive electrode region 252 can contact the first current collector 130.

[0123] Similarly, the uncoated negative electrode region 255 of the first electrode assembly 250a can be led out from a second opening region 141 and bent. The bent uncoated negative electrode region 255 can contact the second current collector 140.

[0124] The uncoated negative electrode region 255 of the second electrode assembly 250b can be led out from another second opening region 141 and bent. The bent uncoated negative electrode region 255 can contact the second current collector 140.

[0125] In one embodiment, a plurality of first opening regions 131 may be staggered in at least one of the stacking directions of the plurality of electrode assemblies 250, the stacking direction of the positive electrode plate 251, and the stacking direction of the negative electrode plate 254, and a plurality of second opening regions 141 may also be staggered in at least one of the stacking directions (Y direction) of the plurality of electrode assemblies 250, the stacking direction of the positive electrode plate 251, and the stacking direction of the negative electrode plate 254.

[0126] For example, the plurality of first opening regions 131 may be staggered or spaced apart from each other in at least one of the stacking direction (Y direction) of the plurality of electrode assemblies 250 and the height direction (Z direction) of the cell 100. In addition, the plurality of second opening regions 141 may also be staggered or spaced apart from each other in at least one of the stacking direction (Y direction) of the plurality of electrode assemblies 250 and the height direction (Z direction) of the cell 100.

[0127] Furthermore, on a plane (YZ plane) parallel to the side of the electrode assembly 250, the plurality of first opening regions 131 may have different heights. For example, the plurality of first opening regions 131 may be located at different heights in the Z-axis direction.

[0128] Furthermore, on a plane (YZ plane) parallel to the side of the electrode assembly 250, a plurality of first opening regions 131 may be staggered from each other in at least one of the following directions: the thickness direction (Y direction) of the cell 100, the stacking direction (Y direction) of the electrode assembly 250, the stacking direction of the positive electrode plate 251, and the stacking direction of the negative electrode plate 254. For example, the plurality of first opening regions 131 may not be arranged on the same straight line in at least one of the Y-axis and Z-axis directions.

[0129] Furthermore, in one embodiment, one of the plurality of first opening regions 131 may face the plurality of positive electrode uncoated regions 252 of the first electrode assembly 250a, and the other first opening region 131 may face the plurality of positive electrode uncoated regions 252 of the second electrode assembly 250b.

[0130] Using the same principle, the above also applies to the multiple second opening regions 141. That is, one of the multiple second opening regions 141 can face the multiple uncoated negative electrode regions 255 of the first electrode assembly 250a, and another second opening region 141 can face the multiple uncoated negative electrode regions 255 of the second electrode assembly 250b.

[0131] Therefore, the multiple uncoated negative electrode regions 255 and multiple uncoated positive electrode regions 252 do not need to be bent or flexed in the height direction (Z direction) of the cell 100 or the electrode assembly 250, but can be bent in only one direction, thereby connecting the multiple positive electrode plates 251 and multiple negative electrode plates 254 to the first current collector 130 and the second current collector 140. This improves the electrical stability of the cell 100 and enhances its quality.

[0132] Furthermore, on a plane (YZ plane) parallel to the side of the electrode assembly 250, the plurality of second opening regions 141 may have different heights. For example, the plurality of second opening regions 141 may be located at different heights in the Z-axis direction.

[0133] Furthermore, on a plane (YZ plane) parallel to the side of the electrode assembly 250, a plurality of second opening regions 141 may be staggered from each other in at least one of the following directions: the thickness direction of the cell 100, the stacking direction (Y direction) of the electrode assembly 250, the stacking direction of the positive electrode plate 251, and the stacking direction of the negative electrode plate 254. For example, the plurality of second opening regions 141 may not be arranged on the same straight line in the Y-axis direction.

[0134] Figure 6 This is a schematic exploded perspective view of an electrode assembly 250 according to another embodiment of the present disclosure.

[0135] like Figure 5 and Figure 6 As shown, in one embodiment of this disclosure, at least one electrode assembly 250 may include multiple electrode assemblies 250, each of which may include multiple positive electrode plates 251 and multiple negative electrode plates 254. Furthermore, multiple uncoated positive electrode regions 252 may overlap and be connected to the first current collector 130, and multiple uncoated negative electrode regions 255 may overlap and be connected to the second current collector 140.

[0136] First, such as Figure 6 As shown, in one embodiment of this disclosure, an electrode assembly 250 may include a plurality of positive electrode plates 251 and a plurality of negative electrode plates 254. In this case, a separator 257 may be disposed between the positive electrode plates 251 and the negative electrode plates 254.

[0137] In an electrode assembly 250, multiple uncoated positive electrode regions 252 may overlap each other in the thickness direction (Y direction) of the positive electrode plate 251 or the thickness direction (Y direction) of the cell 100, and the multiple uncoated positive electrode regions 252 may not overlap with the multiple uncoated negative electrode regions 255 in the thickness direction (Y direction) of the positive electrode plate 251 or the thickness direction (Y direction) of the cell 100.

[0138] Furthermore, in an electrode assembly 250, multiple uncoated negative electrode regions 255 may overlap each other in the thickness direction (Y direction) of the negative electrode plate 254 or the cell 100, and the multiple uncoated negative electrode regions 255 may not overlap with the multiple uncoated positive electrode regions 252 in the thickness direction (Y direction) of the positive electrode plate 251 or the cell 100. Multiple positive electrode plates 251 and multiple negative electrode plates 254 may be stacked according to the above principle.

[0139] like Figure 5 As shown, multiple electrode assemblies 250, which are stacked from multiple negative electrode plates 254 and multiple positive electrode plates 251, can be provided. The multiple electrode assemblies 250 may include a first electrode assembly 250a and a second electrode assembly 250b. The first electrode assembly 250a and the second electrode assembly 250b may be connected to a first current collector 130 and a second current collector 140.

[0140] Figure 7 This is a schematic diagram of the connection state of the current collector and electrode assembly 250 according to another embodiment of the present disclosure.

[0141] Firstly, in another embodiment of this disclosure, the positive electrode plate 251 and the negative electrode plate 254 can be stacked in the receiving space 111 of the housing 110, and the relatively wide surfaces of the positive electrode plate 251 and the negative electrode plate 254 are in contact with each other. Therefore, in this case, the width direction of the positive electrode plate 251 and the negative electrode plate 254 can be parallel to the thickness direction (Y direction) of the cell 100, that is, the thickness direction of the housing 110.

[0142] That is, the positive electrode plate 251 and the negative electrode plate 254 can be stacked along the height direction (Z direction) of the cell 100 or the height direction (Z direction) of the housing 110, and multiple electrode assemblies 250 can also be stacked along the height direction (Z direction) of the cell 100 or the height direction (Z direction) of the housing 100. At this time, the bending regions VA of multiple uncoated positive electrode regions 252 and the bending regions VA of multiple uncoated negative electrode regions 255 can be arranged parallel to or extend along the height direction (Z direction) of the cell 100 or the height direction (Z direction) of the housing 110.

[0143] exist Figure 7 In this case, the relatively wide regions in the Y direction of the first current collector 130 and the second current collector 140, i.e., the length and width portions or the relatively long side portions in the Y direction, can be arranged parallel to the thickness direction (Y direction) of the cell 100 or the thickness direction of the housing 110.

[0144] Figure 7 The current collector shown can be a first current collector 130 and a second current collector 140. The first current collector 130 may have a first opening region 131 and may be connected to a plurality of positive uncoated regions 252. The second current collector 140 may have a second opening region 141 and may be connected to a plurality of negative uncoated regions 255.

[0145] For example, when Figure 7When the current collector shown is the first current collector 130, the opening region can be the first opening region 131, and the uncoated region can be the positive electrode uncoated region 252. Conversely, when the current collector is the second current collector 140, the opening region can be the second opening region 141, and the uncoated region can be the negative electrode uncoated region 255.

[0146] In one embodiment, the first opening region 131 may be a notch or a hole. Furthermore, the second opening region 141 may be a notch or a hole.

[0147] In one embodiment, the first opening region 131 may be a notch, and the second opening region 141 may be a hole. Alternatively, the opposite may be true.

[0148] The first opening region 131 and the second opening region 141 may have the same shape or different form. In addition, the first opening region 131 and the second opening region 141 may be in the form of a slot.

[0149] In one embodiment of this disclosure, the first opening region 131 and the second opening region 141 may be holes. The first opening region 131 and the second opening region 141 may be through holes formed in the first current collector 130 and the second current collector 140.

[0150] Furthermore, in one embodiment, on the thickness direction section (YZ plane) of the negative electrode plate 254 or the positive electrode plate 251, the long side L1 of the first opening region 131 and the second opening region 141 may be arranged perpendicularly to or intersecting with a straight line L3 that extends parallel to the stacking direction (Z direction) of the at least one negative electrode plate 254 and the at least one positive electrode plate 251.

[0151] In one embodiment, on the thickness direction section (YZ plane) of the negative electrode plate 254 or the positive electrode plate 251, the outline OL of the first opening region 131 and the second opening region 141 may include a plurality of straight lines.

[0152] For example, in the thickness direction section (YZ plane) of the negative electrode plate 254 or the positive electrode plate 251, the outline OL of the first opening region 131 and the second opening region 141 can be rectangular. Among the plurality of sides or edges constituting the rectangle, the relatively longer side L1 can be arranged perpendicularly to a straight line extending parallel to the stacking direction of the negative electrode plate 254 and the positive electrode plate 251. Therefore, the shorter side L2 can be arranged parallel to a straight line extending parallel to the stacking direction (Z direction) of the negative electrode plate 254 and the positive electrode plate 251.

[0153] In one embodiment, the width of the first opening region 131 and the second opening region 141 in the thickness direction (Y direction) of the cell 100, i.e., the length of the long side L1, can be greater than or equal to the width of the uncoated negative electrode region 255 and the width of the uncoated positive electrode region 252 in the Y direction. Therefore, the uncoated negative electrode region 255 and the uncoated positive electrode region 252 can be easily extended from the first opening region 131 and the second opening region 141.

[0154] Furthermore, in one embodiment, the width of the first opening region 131 and the second opening region 141 in the height direction (Z direction) of the cell 100, i.e. the length of the short side L2, can be determined within the range where at least a portion of the entire plurality of positive electrode uncoated regions 252 and at least a portion of the entire plurality of negative electrode uncoated regions 255 can be welded to the first current collector 130 and the second current collector 140.

[0155] For example, the bending regions VA of the plurality of positive uncoated regions 252 and the bending regions VA of the plurality of negative uncoated regions 255 can overlap with the first current collector 130 and the second current collector 140 in the width direction (X direction) of the cell 100. Furthermore, the bonding wire W1 can be formed in the region where the bending regions VA of the plurality of positive uncoated regions 252 and the bending regions VA of the plurality of negative uncoated regions 255 overlap with the first current collector 130 and the second current collector 140 in the width direction (X direction) of the cell 100.

[0156] Furthermore, in one embodiment, at least a portion of each of the plurality of uncoated negative electrode regions 255 can be soldered to the second current collector 140, and at least a portion of each of the plurality of uncoated positive electrode regions 252 can be soldered to the first current collector 130. Therefore, the electrode assembly 250 can be electrically connected to the first current collector 130 and the second current collector 140.

[0157] Figure 8 This is a schematic diagram of the connection state of the current collector and electrode assembly 250 according to another embodiment of the present disclosure.

[0158] like Figure 8 As shown, in one embodiment of this disclosure, the first opening region 131 and the second opening region 141 may be notches formed in the first collector component 130 and the second collector component 140.

[0159] Multiple uncoated negative electrode regions 255 and multiple uncoated positive electrode regions 252 can pass through the first opening region 131 and the second opening region 141 in the form of a notch, and the ends E of the multiple uncoated positive electrode regions 252 and the ends E of the multiple uncoated negative electrode regions 255 can be bent toward the first current collector 130 and the second current collector 140.

[0160] Then, the bent areas of the plurality of positive uncoated regions 252 and the bent areas of the plurality of negative uncoated regions 255 can be welded to the first current collector 130 and the second current collector 140. At this time, the bent areas include the ends E of the plurality of positive uncoated regions 252 and the ends E of the plurality of negative uncoated regions 255, and the ends E of the plurality of positive uncoated regions 252 and the ends E of the plurality of negative uncoated regions 255 can also be welded to the first current collector 130 and the second current collector 140.

[0161] In one embodiment, welding may be laser welding, but this disclosure does not limit the welding method.

[0162] The following will refer to Figures 5 to 8 The bending direction and welding direction of the uncoated positive electrode area 252 and the uncoated negative electrode area 255 are explained.

[0163] In one embodiment, the ends E of the plurality of uncoated positive electrode regions 252 and the ends E of the plurality of uncoated negative electrode regions 255 may be bent toward the first current collector 130 and the second current collector 140, and the ends E of the plurality of uncoated positive electrode regions 252 and the ends E of the plurality of uncoated negative electrode regions 255 may extend in a direction parallel to the stacking direction (Z direction) of the plurality of positive electrode plates 251 and the plurality of negative electrode plates 254.

[0164] For example, in the first current collector 130, after the multiple uncoated positive electrode regions 252 of the first electrode assembly 250a can be led out from a first opening region 131, the ends E of the multiple uncoated positive electrode regions 252 can be bent in a first direction.

[0165] In the thickness-direction cross-section (XZ plane) of the cell 100, the bending regions VA of the multiple uncoated positive electrode regions 252 can be perpendicular to or intersect with the positive active material region 253 of the positive electrode plate 251. In this case, the end E of the uncoated positive electrode region 252 can be bent or folded by rotating 90° while remaining parallel to the positive active material region 253. That is, the end E of the uncoated positive electrode region 252 can be bent by rotating 90° from the XY plane toward the Z-axis. The same principle applies to the uncoated negative electrode region 255.

[0166] In one embodiment, a plurality of uncoated positive electrode regions 252 extending from one first opening region 131 and a plurality of uncoated positive electrode regions 252 extending from another first opening region 131 can be bent in different directions. Similarly, a plurality of uncoated negative electrode regions 255 extending from one second opening region 141 and a plurality of uncoated negative electrode regions 255 extending from another second opening region 141 can be bent in different directions. For example, when a plurality of uncoated positive electrode regions 252 extending from one first opening region 131 and a plurality of uncoated positive electrode regions 252 extending from another first opening region 131 are bent toward each other, the plurality of uncoated positive electrode regions 252 extending from one first opening region 131 and a plurality of uncoated positive electrode regions 252 extending from another first opening region 131 can be bent in different or opposite directions. The same principle applies to the plurality of second opening regions 141.

[0167] For example, such as Figure 7 and Figure 8 As shown, in a first current collector 130, the ends E of a plurality of uncoated positive electrode regions 252 extending from a first opening region 131 and the ends E of another plurality of uncoated positive electrode regions 252 extending from another first opening region 131 can be bent toward each other.

[0168] For example, in the first current collector 130, the ends E of a plurality of uncoated positive electrode regions 252 extending from a first opening region 131 and the ends E of another plurality of uncoated positive electrode regions 252 extending from another first opening region 131 can be bent toward each other while being separated from each other by the Y-axis.

[0169] Therefore, the ends E of the plurality of uncoated positive electrode regions 252 extending from one first opening region 131 can be bent in the -Z direction, and the ends E of the plurality of other uncoated positive electrode regions 252 extending from another first opening region 131 can be bent in the +Z direction.

[0170] exist Figure 5 In the case of the first current collector 130, the ends E of a plurality of positive uncoated regions 252 extending from one first opening region 131 and the ends E of another plurality of positive uncoated regions 252 extending from another first opening region 131 can be bent toward each other while being separated from each other by the Z-axis.

[0171] Therefore, it is possible to prevent the width of the first current collector 130 from increasing excessively in the thickness direction (Y direction) of the cell 100. The same principle applies to the second current collector 140.

[0172] That is, in the second current collector 140, the ends of a plurality of uncoated negative electrode regions 255 extending from one second opening region 141 and the ends of another plurality of uncoated negative electrode regions 255 extending from another second opening region 141 can be bent toward each other.

[0173] In one embodiment, at least one uncoated positive electrode region 252 can be soldered onto the first current collector 130, and at least one uncoated negative electrode region 255 can be soldered onto the second current collector 140. In this case, the solder line W1 formed in the at least one uncoated positive electrode region 252 can be parallel to the stacking direction of the at least one negative electrode plate 254 and the at least one positive electrode plate 251, and the solder line W1 formed in the at least one uncoated negative electrode region 255 can be parallel to the stacking direction of the at least one negative electrode plate 254 and the at least one positive electrode plate 251.

[0174] exist Figure 5 In this case, at least one negative electrode plate 254 and at least one positive electrode plate 251 are stacked along the Y direction, and the welding line W1 can be parallel to the Y direction.

[0175] exist Figure 7 and Figure 8 In this case, at least one negative electrode plate 254 and at least one positive electrode plate 251 are stacked along the Z direction, and the welding line W1 can be parallel to the Z direction.

[0176] like Figure 7 and Figure 8 As shown, in one embodiment, on the thickness direction section (YZ plane) of the cell 100, the end E of the uncoated positive electrode region 252 can extend in a direction parallel to the height direction (Z direction) of the cell 100. This is true even if multiple uncoated positive electrode regions 252 are provided. Therefore, the direction in which the end E of the uncoated positive electrode region 252 extends is parallel to the height direction (Z direction) of the cell 100, and the welding line W1 formed on the uncoated positive electrode region 252 can also be parallel to the direction in which the end of the uncoated positive electrode region 252 extends and the height direction of the cell 100.

[0177] When multiple uncoated positive electrode regions 252 are provided, the welding line W1 can be formed in all of them. The welding can be laser welding. When the uncoated positive electrode regions 252 melt and solidify, they can be connected, fixed, or fused to the first current collector 130. The same principle applies to the uncoated negative electrode regions 255 and the second current collector 140.

[0178] Therefore, multiple positive uncoated areas 252 can be connected to the first current collector 130, and multiple negative uncoated areas 255 can be connected to the second current collector 140.

[0179] For example, the welding line W1 formed in multiple positive electrode uncoated areas 252 can be a welding bead, and the straight line connecting the welding bead or extending the welding bead along the height direction (Z direction) of the cell 100 can be the welding line W1.

[0180] exist Figure 5 In this case, the straight line extending the weld along the thickness direction (Y direction) of the cell 100 can be the welding line W1.

[0181] As described above, when the uncoated positive electrode region 252 and the first terminal 121 are arranged perpendicularly to each other, and when the uncoated negative electrode region 255 and the second terminal 122 are arranged perpendicularly to each other, the first current collector 130 and the second current collector 140 can be easily connected to the uncoated positive electrode region 252 and the first terminal 121, and the uncoated negative electrode region 255 and the second terminal 122. This prevents unnecessary increases in the size of the battery cell 100.

[0182] Furthermore, the bending direction of at least one uncoated positive electrode region 252 and at least one uncoated negative electrode region 255 can be determined based on the stacking direction of at least one positive electrode plate 251 and at least one negative electrode plate 254.

[0183] Figure 9 This is a schematic diagram of the connection state of the current collector and electrode assembly 250 according to another embodiment of the present disclosure.

[0184] exist Figure 9 In the middle, the stacking direction of the positive electrode plate 251 and the negative electrode plate 254 is the same as that of the positive electrode plate 251 and the negative electrode plate 254. Figure 5 The positive electrode 251 and the negative electrode 254 are stacked in the same direction. Figure 9 In the diagram, the first opening region 131 and the second opening region 141 are shown as gaps.

[0185] like Figure 9 As shown, at least one uncoated positive electrode region 252 and at least one uncoated negative electrode region 255 can be bent in the stacking direction of at least one positive electrode plate 251 and at least one negative electrode plate 254.

[0186] Therefore, when the positive electrode plate 251 and the negative electrode plate 254 are stacked, and the wider surfaces of the positive electrode plate 251 and the negative electrode plate 254 are parallel to the side surface of the housing 110 or the side surface (XZ plane) of the cell 100, the welding line W1 formed in at least one uncoated positive electrode area 252 and at least one uncoated negative electrode area 255 can be parallel to the thickness direction (Y direction) of the cell 100 or the thickness direction of the housing 110.

[0187] On the contrary, such as Figure 7 and Figure 8As shown, when the positive electrode plate 251 and the negative electrode plate 254 are stacked, and the wider surfaces of the positive electrode plate 251 and the negative electrode plate 254 are parallel to the bottom surface of the housing 110 or the bottom surface of the cell 100, the welding line W1 formed in the uncoated positive electrode area 252 and the uncoated negative electrode area 255 can be parallel to the height direction (Z direction) of the cell 100 or the height direction of the housing 110.

[0188] On the other hand, another aspect of this disclosure provides a battery cell manufacturing apparatus 300.

[0189] The battery cell 100 can be the battery cell 100 described in at least one of the above embodiments. Alternatively, it can be a combination of the above embodiments. Or it can be other battery cells.

[0190] Figure 10 This is a schematic diagram of a battery cell manufacturing apparatus 300 according to an embodiment of the present disclosure. Figure 10 In this diagram, the uncoated positive electrode region 252 and the uncoated negative electrode region 255 are shown as an odd number, but multiple uncoated positive electrode regions 252 and uncoated negative electrode regions 255 may also be provided. Furthermore, Figure 10 The uncoated positive electrode area 252 and the first current collector 130 can be along the... Figure 5 The I-I' line is shown.

[0191] like Figure 10As shown, one embodiment of this disclosure provides a battery cell manufacturing apparatus 300, the battery cell including an electrode assembly 150, the electrode assembly 150 including: at least one electrode assembly 250 including at least one negative electrode plate 254 and at least one positive electrode plate 251; a first current collector 130 including a first opening region 131 and connected to a first terminal 121 of a cover plate 120, at least one uncoated positive electrode region 252 of the at least one positive electrode plate 251 without active material extending out from the first opening region 131; and a second current collector 140 including a second opening region 141 and connected to a second terminal 122 of the cover plate 120, at least one uncoated negative electrode region 252 of the at least one negative electrode plate 254 without active material extending out from the first opening region 131; and a second current collector 140 including a second opening region 141 and connected to a second terminal 12 ... at least one negative electrode plate 254 without active material extending out from the first opening region 131; and a second current collector 140 including a second opening region 141 and connected to a second terminal 122 of the cover plate 120; and a second current collector 1 The coating area 255 extends from the second opening area 141. The manufacturing apparatus 300 includes: a moving member 310 for moving the first current collector 130 and the second current collector 140; a gripper member 320 for clamping the at least one positive uncoated area 252 and the at least one negative uncoated area 255; a mask member 330 for pressurizing and bending the at least one positive uncoated area 252 and the at least one negative uncoated area 255; and a welding member 340 for welding the at least one positive uncoated area 252 and the at least one negative uncoated area 255 to the first current collector 130 and the second current collector 140.

[0192] The moving part 310 can move the first current collector 130 and the second current collector 140 in at least one direction. The moving part 310 can be composed of a combination of motor, gear, beam, etc., or it can be a cylinder 325 operated by hydraulic or pneumatic pressure.

[0193] Furthermore, the moving part 310 can be a linear motion structure. The linear motion structure can include at least one of a linear bearing, a linear guide, ball screws, a linear actuator, a linear motor, and a linear slide.

[0194] Furthermore, the moving part 310 can be a robotic arm. Additionally, the moving part 310 can be configured as a combination of various mechanisms utilizing computer-aided engineering (CAE). This disclosure does not limit the type of the moving part 310.

[0195] The moving part 310 can be connected to a controller or the like for automatic control.

[0196] The movable component 310 can move the first current collector 130 and the second current collector 140 around the electrode assembly 250. For example, the movable component 310 can move the first current collector 130 and the second current collector 140 around the positive uncoated region 252 and the negative uncoated region 255.

[0197] In addition, the movable component 310 can move the first collector component 130 and the second collector component 140 so that the first opening region 131 and the second opening region 141 face the positive electrode uncoated region 252 and the negative electrode uncoated region 255.

[0198] Multiple moving parts 310 can be provided. In addition, the moving parts 310 can move the first collector part 130 and the second collector part 140 simultaneously, or they can move the first collector part 130 and the second collector part 140 sequentially.

[0199] For example, when a movable component 310 is provided, after completing the work of welding the uncoated positive electrode area 252 to the first current collector 130, the movable component 310 can move to the vicinity of the uncoated negative electrode area 255 to continue the work of welding the uncoated negative electrode area 255 to the second current collector 140. Alternatively, the welding operations can be performed simultaneously. In this case, the electrode assembly 250 can be fixed and supported by other fixing devices.

[0200] The clamping component 320 can move toward the positive uncoated area 252 and the negative uncoated area 255. In one embodiment, a clamping drive component 321 for moving the clamping component 320 may be provided. The clamping drive component 321 may be a linear motion structure. The linear motion structure may include at least one of a linear bearing, a linear guide, ball screws, a linear actuator, a linear motor, and a linear slide.

[0201] Furthermore, the clamp drive component 321 can be a robotic arm. Additionally, the clamp drive component 321 can be configured as a combination of various mechanisms utilizing computer-aided engineering (CAE). This disclosure does not limit the type of clamp drive component 321.

[0202] The clamping component 320 can clamp the uncoated positive electrode region 252 and the uncoated negative electrode region 255 through the first opening region 131 and the second opening region 141. The uncoated positive electrode region 252 and the uncoated negative electrode region 255 can pass through or through the first opening region 131 and the second opening region 141 through the clamping component 320. Subsequently, the first current collector component 130 and the second current collector component 140 can be further moved toward the electrode assembly 250. The uncoated positive electrode region 252 and the uncoated negative electrode region 255 can penetrate or pass through the first opening region 131 and the second opening region 141.

[0203] like Figure 10 As shown, the first current collector 130 can be connected to the uncoated positive electrode region 252, and the second current collector 140 can be connected to the uncoated negative electrode region 255. When Figure 10 When the current collector shown is the second current collector 140, the moving member 310 can move the second current collector 140 to the vicinity of the negative electrode uncoated area 255 or move the second current collector 140 in the direction toward the negative electrode uncoated area 255.

[0204] The uncoated negative electrode region 255 can pass through the second opening region 141 and bend to connect to the second current collector 140. At this time, the second current collector 140 can move towards the uncoated negative electrode region 255, or the electrode assembly 250 can move towards the second current collector 140. The electrode assembly 250 can be moved by a separate actuator. By the same principle, the above also applies to the first current collector 130, the uncoated positive electrode region 252, and the first opening region 131. That is, when... Figure 10 When the current collector shown is the first current collector 130, the moving member 310 can move the first current collector 130 to the vicinity of the positive electrode uncoated area 252 or move the first current collector 130 in the direction toward the positive electrode uncoated area 252.

[0205] Figure 11 This is a schematic operational diagram of a clamping component 320 according to an embodiment of the present disclosure. Figure 10 and Figure 11 As shown, in one embodiment of this disclosure, the clamping component 320 may include: a first clamping arm 322 facing one side of the at least one positive electrode uncoated region 252 and one side of the at least one negative electrode uncoated region 255; a second clamping arm 323 spaced apart from the first clamping arm 322 in the thickness direction of the at least one positive electrode uncoated region 252; and an interval adjustment actuator 324 connected to the first clamping arm 322 and the second clamping arm 323 for moving at least one of the first clamping arm 322 and the second clamping arm 323.

[0206] At least one positive electrode uncoated area 252 and at least one negative electrode uncoated area 255 may be located between the first clamping arm 322 and the second clamping arm 323. In this case, a clamping component 320 may clamp only at least one positive electrode uncoated area 252 at a certain time point and only at least one negative electrode uncoated area 255 at another time point.

[0207] That is, in order to connect the first current collector 130 to at least one positive uncoated region 252, the clamping member 320 may clamp only at least one positive uncoated region 252. Similarly, in order to connect the second current collector 140 to at least one negative uncoated region 255, the clamping member 320 may clamp only at least one negative uncoated region 255. In other words, a single clamping member 320 will not clamp both positive and negative uncoated regions 252 and 255 together.

[0208] In one embodiment, the interval adjustment actuator 324 may be a cylinder 325. The cylinder 325 may be hydraulically or pneumatically operated, but this disclosure does not limit its type.

[0209] For example, the main body 325a of the cylinder 325 can be fixed to the second clamping arm 323, and the piston rod 325b can extend toward the first clamping arm 322 and be fixed to the first clamping arm 322. Therefore, as the piston rod 325b extends or retracts, the interval between the first clamping arm 322 and the second clamping arm 323 can change.

[0210] In one embodiment, the operation of supplying hydraulic or pneumatic pressure to the cylinder 325 can be performed automatically by the controller or directly by the operator manually controlling the hydraulic valve or pneumatic valve. For example, the controller may include at least one of a microcontroller, a micro controller unit, and a programmable logic controller (PLC).

[0211] The first clamping arm 322 and the second clamping arm 323 can be in close contact with at least one positive electrode uncoated area 252 and at least one negative electrode uncoated area 255. According to the clamping component 320, even if there are multiple positive electrode uncoated areas 252 and negative electrode uncoated areas 255, no pre-welding or ultrasonic welding process is required for them.

[0212] Figure 12 This is a schematic diagram of a battery cell manufacturing apparatus 300 according to another embodiment of the present disclosure. Figure 12In the diagram, the uncoated positive electrode region 252 and the uncoated negative electrode region 255 are shown as multiple areas. Furthermore, Figure 12 The multiple uncoated positive electrode areas 252 and the first current collector 130 are along the Figure 5 The I-I' line is shown.

[0213] Figure 12 The image shows the clamping component 320 holding the uncoated positive electrode region 252, but the clamping component 320 can also be tilted toward the uncoated negative electrode region. Figure 10 Move in the direction of 255 to clamp the uncoated area of ​​the negative electrode ( Figure 10 255 in the middle). In this case, the uncoated area of ​​the negative electrode ( Figure 10 (255) can be in a state that passes through the second opening region 141 of the second collector component 140.

[0214] like Figure 12 As shown, when there are multiple uncoated positive electrode regions 252 and multiple uncoated negative electrode regions 255, the clamping component 320 can move according to the total thickness of the multiple uncoated positive electrode regions 252 and multiple uncoated negative electrode regions 255. That is, the first clamping arm 322 can move so that the multiple uncoated positive electrode regions 252 and multiple uncoated negative electrode regions 255 can be clamped and fixed by the clamping component 320. At this time, the clamping component 320 can clamp the region including the ends of the multiple uncoated positive electrode regions 252 and the ends of the multiple uncoated negative electrode regions 255.

[0215] At this time, the ends of the plurality of uncoated positive electrode regions 252 and the ends of the plurality of uncoated negative electrode regions 255 can be exposed to the outside of the first opening region 131 and the second opening region 141. This can be achieved by moving the first current collector 130 and the second current collector 140 by the moving component 310.

[0216] Figure 13 yes Figure 12 A schematic diagram of the operating state of the battery cell manufacturing apparatus 300. Figure 13 The image shows the bent state of the uncoated positive electrode region 252, but the uncoated negative electrode region ( Figure 10 The 255 in the middle can also pass through the second opening region 141 of the second current collector 140 and be bent by the mask member 330 by the same principle. By the same principle, the following description also applies to the uncoated negative electrode region ( Figure 10 (255 in the middle).

[0217] exist Figure 13 In the middle, multiple uncoated positive electrode areas 252 and the first current collector 130 are along Figure 5 The I-I' line is shown.

[0218] like Figure 13 As shown, with the clamping component 320 fixing the plurality of positive electrode uncoated areas 252 and the plurality of negative electrode uncoated areas 255, the mask component 330 can be lowered. In one embodiment, the mask component 330 may be made of an electrically insulating material.

[0219] Furthermore, for example, the mask component 330 can be made of a material containing beryllium copper. Beryllium copper can be an alloy of copper (Cu) and beryllium (Be).

[0220] In one embodiment, the area of ​​the mask component 330 that contacts the uncoated positive electrode area 252 and the uncoated negative electrode area 255 may be provided with a pad or the like made of a polymer-containing material. Therefore, scratches, cracks, etc., can be prevented from forming on the electrode assembly 250 by the mask component 330. The aforementioned pad may be detachably provided on the mask component 330.

[0221] The mask component 330 may be located on top of the electrode assembly 250. Furthermore, the mask component 330 may have a predetermined level of rigidity. Additionally, a mask drive component 331 may be provided for moving the mask component 330. The mask drive component 331 may employ various structures capable of moving the mask component 330.

[0222] The mask driving component 331 may be configured to be of the same type as the fixture driving component 321 described above, but this disclosure does not limit its type.

[0223] The mask component 330 can descend from the top of the electrode assembly 250 while applying pressure to the uncoated positive electrode region 252 and the uncoated negative electrode region 255. At this time, the uncoated positive electrode region 252 and the uncoated negative electrode region 255 can be bent.

[0224] At this time, the clamping member 320 can rotate toward the electrode assembly 250 while fixing the ends of the positive uncoated region 252 and the negative uncoated region 255. This prevents multiple bending points from appearing in the positive and negative uncoated regions 252 and 255. Specifically, during the descent and bending of the positive and negative uncoated regions 252 and 255 by the mask member 330, the clamping member 320 can rotate 90° counterclockwise while holding the ends of the positive and negative uncoated regions 252 and 255. Therefore, bending of the positive and negative uncoated regions 252 and 255 in any or multiple directions can be prevented.

[0225] However, the clamping component 320 can rotate in the direction in which the positive uncoated area 252 and the negative uncoated area 255 are bent. Furthermore, depending on the situation, the clamping component 320 can release the clamping of the positive uncoated area 252 and the negative uncoated area 255 after a certain period of time to avoid interference with the first current collector 130 and the second current collector 140. For example, when the positive uncoated area 252 and the negative uncoated area 255 are bent or flexed, the clamping component 320 may not clamp the positive uncoated area 252 and the negative uncoated area 255.

[0226] That is, during the period when the mask component 330 descends and bends the positive electrode uncoated region 252 and the negative electrode uncoated region 255, the clamping component 320 may be in a state where it does not clamp the ends of the positive electrode uncoated region 252 and the negative electrode uncoated region 255. As described above, this disclosure does not limit whether the clamping component 320 fixes the positive electrode uncoated region 252 and the negative electrode uncoated region 255 when they are bent or flexed. In this case, after the positive electrode uncoated region 252 and the negative electrode uncoated region 255 are inserted into the first opening region 131 and the second opening region 141, before the positive electrode uncoated region 252 and the negative electrode uncoated region 255 are bent, the clamping component 320 may retract in a direction away from the positive electrode uncoated region 252 and the negative electrode uncoated region 255. Afterward, the mask component 330 may descend and bend the positive electrode uncoated region 252 and the negative electrode uncoated region 255.

[0227] Figure 14 yes Figure 12 and Figure 13 A schematic diagram of the operating state of the battery cell manufacturing apparatus 300. Figure 14 The multiple uncoated positive electrode areas 252 and the first current collector 130 are along the Figure 5 The I-I' line is shown. Figure 14 The image shows the state of the uncoated positive electrode region 252 being bent and pressurized, but the uncoated negative electrode region ( Figure 10 The 255 in the middle can also pass through the second opening region 141 of the second current collector 140 and be bent and pressurized by the mask member 330 through the same principle. Through the same principle, the following description also applies to the uncoated negative electrode region ( Figure 10 (255 in the middle).

[0228] like Figure 14 As shown, the mask component 330 can be moved toward the first collector component 130 and the uncoated positive electrode area 252.

[0229] The mask component 330 can move in a direction intersecting or perpendicular to the downward direction (-Z direction) of the mask component 330 (-X direction) to apply pressure to the uncoated positive electrode area 252. Therefore, the bent uncoated positive electrode area 252 can be tightly adhered to the first current collector component 130. This improves the welding quality.

[0230] Mask component 330 can also be directed toward the second collector component ( Figure 10 The direction of 140 in the middle is relative to the uncoated area of ​​the negative electrode ( Figure 10 The pressure is applied to the 255 in the middle. Therefore, the uncoated area of ​​the negative electrode ( Figure 10 255 in the middle can be closely attached to the second collector component ( Figure 10 140 in the middle).

[0231] Figure 15 yes Figures 12 to 14 A schematic diagram of the operating state of the battery cell manufacturing apparatus 300. Figure 15 The multiple uncoated positive electrode areas 252 and the first current collector 130 are along the Figure 5 The I-I' line is shown. Figure 15 The image shows the state where the uncoated positive electrode region 252 is welded to the first current collector 130, but the uncoated negative electrode region ( Figure 10 The 255 in the middle can also be soldered to the second current collector 140 using the same principle. Using the same principle, the following description also applies to the uncoated negative electrode area (…). Figure 10 (255 in the middle).

[0232] like Figure 15 As shown, the mask component 330 can descend to the ends of multiple positive electrode uncoated regions 252 and multiple negative electrode uncoated regions 255, and bend the ends of the multiple positive electrode uncoated regions 252 and the multiple negative electrode uncoated regions 255.

[0233] After that, as Figure 14 As shown, the mask component 330 can move in a direction perpendicular to the downward direction (-Z direction), i.e., toward the electrode assembly 250, and apply pressure to the multiple uncoated positive electrode regions 252 and multiple uncoated negative electrode regions 255 after bending in the direction toward the electrode assembly 250. The direction of movement in the direction perpendicular to the downward direction (-Z direction) of the mask component 330 can be the pressure direction. Furthermore, the downward direction (-Z direction) of the mask component 330 can also be the direction of movement of the mask component 330.

[0234] Therefore, the multiple uncoated positive electrode areas 252 and multiple uncoated negative electrode areas 255 can be more closely attached to the first current collector 130 and the second current collector 140 before soldering. This helps to improve soldering quality. This movement of the mask component 330 can be implemented by the mask drive component 331.

[0235] In one embodiment of this disclosure, the welding component 340 can be welded in the moving direction (-Z direction) of the mask component 330. That is, the welding component 340 can be welded in a direction parallel to either the moving direction (-Z direction) or the descending direction (-Z direction) of the mask component 330. Therefore, the welding line W1 or weld formed in at least one positive electrode uncoated region 252 and at least one negative electrode uncoated region 255 can be parallel to the descending direction of the mask component 330. This helps to improve operational efficiency.

[0236] Furthermore, when there are multiple uncoated positive electrode areas 252 and multiple uncoated negative electrode areas 255, the welding component 340 can melt all of the multiple uncoated positive electrode areas 252 and multiple uncoated negative electrode areas 255 and then weld them to the first current collector component 130 and the second current collector component 140.

[0237] In one embodiment, the welding component 340 may be the welding head of a laser welding apparatus, but this disclosure does not limit the type of welding component 340.

[0238] In one embodiment, when the welding component 340 is the welding head of a laser welding device, the welding component 340 may be gun-type or scanning-type.

[0239] In one embodiment, the mask component 330 may include a through-hole 332, which serves as a channel for the welding heat source provided by the welding component 340 to move to the at least one positive electrode uncoated region 252 and the at least one negative electrode uncoated region 255. The welding heat source of the welding component 340 may be a laser beam.

[0240] Furthermore, in one embodiment, the welding component 340 may provide a welding heat source to at least one positive uncoated region 252 and at least one negative uncoated region 255. The at least one positive uncoated region 252 and at least one negative uncoated region 255 may face the welding component 340 across the mask component 330.

[0241] In this configuration, the welding component 340 can provide a welding heat source at a location that does not overlap with the first opening region 131 and the second opening region 141. That is, the welding component 340 can provide a welding heat source to at least one uncoated negative electrode region 255 and at least one uncoated positive electrode region 252 at a location that does not overlap with the first opening region 131 and the second opening region 141 in the width direction (X direction) of the cell 100. Therefore, thermal damage to the positive electrode active material region 253 and the negative electrode active material region 256 due to the welding component 340 can be prevented.

[0242] As described above, in one embodiment according to this disclosure, the positive electrode active material region 253 and the negative electrode active material region 256 may not face the welding component 340. Therefore, even when the positive electrode uncoated region 252 and the negative electrode uncoated region 255 are welded to the first current collector 130 and the second current collector 140 with a relatively high heat input, damage to the positive electrode active material region 253 and the negative electrode active material region 256 can be prevented or minimized.

[0243] On the other hand, another aspect of this disclosure provides a method for manufacturing a battery cell 100.

[0244] The battery cell 100 may be the battery cell 100 described in at least one of the above embodiments. Alternatively, the battery cell 100 may be a combination of the above embodiments. Or, the battery cell 100 may be other types of battery cells.

[0245] Figure 16 This is a schematic diagram of a method for manufacturing a battery cell 100 according to an embodiment of the present disclosure.

[0246] like Figures 1 to 16As shown, one embodiment of this disclosure provides a method for manufacturing a battery cell 100, including: a preparation step S110, preparing at least one electrode assembly 250, a first current collector 130, and a second current collector 140. The electrode assembly 250 includes at least one negative electrode plate 254 and at least one positive electrode plate 251. The first current collector 130 includes a first opening region 131 and is connected to a first terminal 121 of a cover plate 120. At least one uncoated positive electrode region 252 of the at least one positive electrode plate 251, which is not coated with active material, extends out from the first opening region 131. The second current collector 140 includes a second opening region 141 and is connected to a second terminal 122 of the cover plate 120. At least one uncoated negative electrode region 255, which is not coated with active material, is led out from the second opening region 141 in at least one negative electrode plate 254; in step S120, at least one uncoated positive electrode region 252 is led out from the first opening region 131 and at least one uncoated negative electrode region 255 is led out from the second opening region 141; in step S130, at least one uncoated positive electrode region 252 is bent and at least one uncoated negative electrode region 255 is bent; and in step S140, at least one uncoated positive electrode region 252 is welded to the first current collector 130 and at least one uncoated negative electrode region 255 is welded to the second current collector 140.

[0247] Step S120 can be performed by moving the first collector 130 and the second collector 140 toward the positive uncoated region 252 and the negative uncoated region 255. However, the reverse is also possible.

[0248] After completing the lead-out step S120, the bending step S130 can be performed. In the bending step S130, the positive electrode uncoated area 252 and the negative electrode uncoated area 255 are pressurized by the mask component 330, etc., and then the positive electrode uncoated area 252 is bent toward the first current collector 130, and the negative electrode uncoated area 255 is bent toward the second current collector 140.

[0249] At this time, when bending the uncoated positive electrode region 252, it can be bent towards the first current collector 130; when bending the uncoated negative electrode region 255, it can be bent towards the second current collector 140. When there are multiple uncoated positive electrode regions 252, multiple uncoated positive electrode regions 252 can be bent simultaneously. The same principle applies to the uncoated negative electrode region 255.

[0250] In one embodiment, in bending step S130, the at least one uncoated positive electrode region 252 and the at least one uncoated negative electrode region 255 may be bent in opposite directions. Alternatively, in bending step S130, the at least one uncoated positive electrode region 252 and the at least one uncoated negative electrode region 255 may be bent in the same direction.

[0251] In one embodiment, during the bending step S130, the end of at least one positive uncoated region 252 can be bent toward the first current collector 130, and the end of at least one negative uncoated region 255 can be bent toward the second current collector 140. Therefore, the ends of at least one positive uncoated region 252 and at least one negative uncoated region 255 can be tightly attached to the first current collector 130 and the second current collector 140, respectively.

[0252] Furthermore, in one embodiment, in the bending step S130, the at least one uncoated positive electrode region 252 and the at least one uncoated negative electrode region 255 can be rotated around an axis perpendicular to the thickness direction of the at least one negative electrode plate 254 and the thickness direction of the at least one positive electrode plate 251, so as to bend the at least one uncoated positive electrode region 252 and the at least one uncoated negative electrode region 255.

[0253] At this time, the at least one positive electrode uncoated region 252 and the at least one negative electrode uncoated region 255 can be bent by rotating the end of the at least one positive electrode uncoated region 252 and the end of the at least one negative electrode uncoated region 255.

[0254] The bending step S130 can be performed by applying pressure to the region including the end of the at least one positive electrode uncoated region 252 and the region including the end of the at least one negative electrode uncoated region 255 through the mask component 330.

[0255] After completing the bending step S130, the welding step S140 can be performed. The welding step S140 can be performed by providing a welding heat source through the welding component 340. In the welding step S140, welding can be performed by moving the welding component 340. The welding component 340 can weld at least one bent area in the positive electrode uncoated area 252 and at least one bent area in the negative electrode uncoated area 255. At this time, the bent area of ​​the positive electrode plate 251 can be the area between the bending point of the positive electrode plate 251 and the end of the positive electrode uncoated area 252.

[0256] Furthermore, the bending region of the negative electrode plate 254 can be the area between the bending point of the negative electrode plate 254 and the end of the uncoated negative electrode area 255. The welding component 340 can provide a welding heat source to at least a portion of the bending region.

[0257] In one embodiment, the welding step S140 may be a laser welding step. Therefore, ultrasonic welding and the like can be excluded from the manufacturing process of the battery cell 100.

[0258] Furthermore, in one embodiment, in welding step S140, welding can be performed in a direction parallel to the thickness direction of the at least one negative electrode plate 254 and the thickness direction of the at least one positive electrode plate 251. Therefore, the welding line W1 formed in at least one uncoated positive electrode region 252 and at least one uncoated negative electrode region 255 can be parallel to the thickness direction of the at least one negative electrode plate 254 and the thickness direction of the at least one positive electrode plate 251. Thus, welding can be performed in the same direction as the bending direction, which helps improve manufacturing efficiency.

[0259] The above description is merely an example of applying the principles of this disclosure. Other configurations may be included or replaced without departing from the scope of this disclosure. Furthermore, this disclosure can be implemented by deleting or modifying some components in the above embodiments, and the various embodiments can also be combined with each other.

Claims

1. A battery cell, comprising: The casing, including the containing space; A cover plate, connected to the housing, and including a first terminal and a second terminal; as well as An electrode assembly is disposed within the receiving space and connected to the first terminal and the second terminal. The electrode assembly includes: At least one electrode assembly, the electrode assembly comprising at least one negative electrode plate and at least one positive electrode plate; A first current collector includes a first opening region and is connected to the first terminal, wherein at least one uncoated positive electrode region of the at least one positive electrode plate, which is not coated with active material, extends from the first opening region; and The second current collector includes a second opening region and is connected to the second terminal, wherein at least one uncoated negative electrode region of the at least one negative electrode plate, which is not coated with active material, extends out from the second opening region. The at least one uncoated area of ​​the positive electrode is bent and comes into contact with the first current collector. The at least one uncoated negative electrode area is bent and comes into contact with the second current collector.

2. The battery cell according to claim 1, wherein, The at least one electrode assembly includes multiple electrode assemblies. The first current collector includes multiple first opening regions. The second current collector includes a plurality of second opening regions.

3. The battery cell according to claim 2, wherein, The uncoated positive electrode areas of multiple electrode assemblies are led out from multiple first opening areas. The uncoated negative electrode areas of multiple electrode assemblies are led out from multiple second opening areas.

4. The battery cell according to claim 3, wherein, The plurality of electrode assemblies are stacked in the same direction as the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate. The plurality of first opening regions are staggered relative to each other in the stacking direction. The plurality of second opening regions are staggered relative to each other in the stacking direction.

5. The battery cell according to claim 1, wherein, The at least one electrode assembly includes multiple electrode assemblies. Each of the plurality of electrode assemblies includes a plurality of positive electrode plates and a plurality of negative electrode plates. Multiple uncoated positive electrode areas overlap each other and are connected to the first current collector component. Multiple uncoated negative electrode areas overlap each other and are connected to the second current collector.

6. The battery cell according to claim 5, wherein, The ends of the plurality of uncoated positive electrode regions and the ends of the plurality of uncoated negative electrode regions are bent toward the first current collector and the second current collector. The ends of the plurality of uncoated positive electrode regions and the ends of the plurality of uncoated negative electrode regions extend in a direction parallel to the stacking direction of the plurality of positive electrode plates and the plurality of negative electrode plates.

7. The battery cell according to any one of claims 1 to 6, wherein, The first opening area is a notch or a hole. The second opening area is a notch or hole.

8. The battery cell according to any one of claims 1 to 6, wherein, The at least one uncoated positive electrode area is welded to the first current collector component. The at least one uncoated negative electrode area is welded to the second current collector component. The welding lines formed in the at least one uncoated positive electrode area and the welding lines formed in the at least one uncoated negative electrode area are parallel to the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate.

9. The battery cell according to any one of claims 2 to 4, wherein, Multiple uncoated positive electrode regions extending from one first opening region and multiple uncoated positive electrode regions extending from another first opening region bend in different directions. Multiple uncoated negative electrode regions extending from one second opening region and multiple uncoated negative electrode regions extending from another second opening region bend in different directions.

10. The battery cell according to any one of claims 1 to 6, wherein, In the thickness direction section of the at least one negative electrode plate or the at least one positive electrode plate, the long sides of the first opening region and the second opening region are arranged perpendicularly to a straight line extending parallel to the stacking direction of the at least one negative electrode plate and the at least one positive electrode plate.

11. The battery cell according to any one of claims 1 to 6, wherein, In the thickness direction section of the at least one negative electrode plate or the at least one positive electrode plate, the outline of the first opening region and the second opening region includes a plurality of straight lines.

12. An apparatus for manufacturing a battery cell, the battery cell comprising an electrode assembly, the electrode assembly comprising: At least one electrode assembly, the electrode assembly comprising at least one negative electrode plate and at least one positive electrode plate; The first current collector includes a first opening region and is connected to a first terminal of the cover plate, wherein at least one uncoated positive electrode region of the at least one positive electrode plate is led out from the first opening region. And a second current collector, including a second opening region and connected to a second terminal of the cover plate, wherein at least one uncoated negative electrode region of the at least one negative electrode plate, which is not coated with active material, extends out from the second opening region, and the cell manufacturing apparatus includes: A movable component for moving the first current collector and the second current collector; A clamping component for clamping the at least one uncoated positive electrode area and the at least one uncoated negative electrode area; A mask component for pressurizing and bending the at least one uncoated positive electrode area and the at least one uncoated negative electrode area; and A welding component for welding the at least one uncoated positive electrode area and the at least one uncoated negative electrode area to the first current collector and the second current collector.

13. The battery cell manufacturing apparatus according to claim 12, wherein, The clamping component includes: The first clamping arm faces one side of the at least one uncoated positive electrode region and one side of the at least one uncoated negative electrode region; The second clamping arm is spaced apart from the first clamping arm in the thickness direction of the at least one uncoated positive electrode area; and An interval adjustment actuator, connected to the first clamping arm and the second clamping arm, is used to move at least one of the first clamping arm and the second clamping arm.

14. The battery cell manufacturing apparatus according to claim 12 or 13, wherein, The welding components are welded along the moving direction of the mask components.

15. The battery cell manufacturing apparatus according to claim 12 or 13, wherein, The welding component provides a welding heat source at a location that does not overlap with the first opening region and the second opening region.

16. A method for manufacturing a battery cell, comprising: Preparation steps: Prepare at least one electrode assembly, a first current collector, and a second current collector. The electrode assembly includes at least one negative electrode plate and at least one positive electrode plate. The first current collector includes a first opening region and is connected to a first terminal of a cover plate. At least one uncoated positive electrode region of the at least one positive electrode plate without active material is led out from the first opening region. The second current collector includes a second opening region and is connected to a second terminal of the cover plate. At least one uncoated negative electrode region of the at least one negative electrode plate without active material is led out from the second opening region. The extraction step involves extracting at least one uncoated positive electrode region from the first opening region and extracting at least one uncoated negative electrode region from the second opening region. The bending step involves bending the at least one uncoated positive electrode area and bending the at least one uncoated negative electrode area. as well as The welding step involves welding at least one uncoated positive electrode area to the first current collector and welding at least one uncoated negative electrode area to the second current collector.

17. The method for manufacturing a battery cell according to claim 16, wherein, In the bending step, the end of the at least one uncoated positive electrode region is bent toward the first current collector, and the end of the at least one uncoated negative electrode region is bent toward the second current collector.

18. The method for manufacturing a battery cell according to claim 16 or 17, wherein, Laser welding is performed in the welding step.

19. The method for manufacturing a battery cell according to claim 16 or 17, wherein, In the bending step, the at least one uncoated positive electrode area and the at least one uncoated negative electrode area are rotated around an axis perpendicular to the thickness direction of the at least one negative electrode plate and the thickness direction of the at least one positive electrode plate, so as to bend the at least one uncoated positive electrode area and the at least one uncoated negative electrode area.

20. The method for manufacturing a battery cell according to claim 16 or 17, wherein, In the welding step, welding is performed in a direction parallel to the thickness direction of the at least one negative electrode plate and the thickness direction of the at least one positive electrode plate.

Images