Electrode sheet, electrode sheet assembly, battery cell, battery pack and electric device

Abstract

An electrode sheet (10), an electrode sheet assembly (100), a battery cell (1000), a battery pack, and an electric device. The electrode sheet (10) comprises current-conducting portions (101) and a main body portion (103) connected to the current-conducting portions (101). The current-conducting portions (101) are connected to at least two different edges of the main body portion (103).

Description

Pole piece, pole piece assembly, battery cell, battery pack and electric equipment

[0001] Priority information

[0002] The present application claims priority to the Chinese patent application No. 202410798207.1, filed on June 19, 2024, and entitled "Pole piece, pole piece assembly, battery cell, battery pack and electric equipment", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, and in particular to a pole piece, a pole piece assembly, a battery cell, a battery pack and an electric equipment. BACKGROUND

[0004] In the related art, in order to meet the growing demand for fast charging of batteries, a battery cell is generally provided with multiple pole tabs to improve the current-carrying capacity of the battery. However, due to the small overcurrent area of the pole tab, the overcurrent capacity is poor, which leads to the inability to meet the fast charging and fast discharging requirements of the battery.

[0005] The demand for fast charging and fast discharging of batteries with higher requirements. SUMMARY

[0006] Therefore, the present application aims to at least partially solve one of the problems in the related art. To this end, the present disclosure aims to provide a pole piece, a pole piece assembly, a battery cell, a battery pack and an electric equipment.

[0007] The present disclosure provides a pole piece. The pole piece comprises a current-carrying portion and a main body portion connected to the current-carrying portion. The current-carrying portion is connected to at least two different edges of the main body portion.

[0008] In some embodiments, the ratio of the length of the edge of the main body portion covered by the current-carrying portion to the total length of the edge of the main body portion is greater than or equal to 50%.

[0009] In some embodiments, the current-carrying portion completely covers the edge of the main body portion.

[0010] In some embodiments, the main body portion comprises a first main body edge and a second main body edge connected to the first main body edge, and the current-carrying portion comprises a first current-carrying segment and a second current-carrying segment connected to the first current-carrying segment at a preset angle, the first current-carrying segment being connected to the first main body edge, and the second current-carrying segment being connected to the second main body edge.

[0011] In some embodiments, the pole piece comprises a coating layer, the main body portion comprises a current collector, and the coating layer is disposed on the current collector.

[0012] The disclosure also provides a pole piece assembly. The pole piece assembly comprises a plurality of separators and a plurality of the pole pieces according to any of the above embodiments. The pole pieces comprise positive pole pieces and negative pole pieces. The separators, the positive pole pieces and the negative pole pieces are arranged in an alternating stack. The positive pole pieces comprise a first flow guide part and a first main body part connected with the first flow guide part, the first flow guide part being connected to at least two different edges of the first main body part; and / or, the negative pole pieces comprise a second flow guide part and a second main body part connected with the second flow guide part, the second flow guide part being connected to at least two different edges of the second main body part.

[0013] In some embodiments, the first flow guide part protrudes from a different edge of the separator, the second flow guide part protrudes from a different edge of the separator, and the first flow guide part is arranged in a spaced manner with the second flow guide part.

[0014] In some embodiments, the first main body part comprises a first edge and a second edge connected with the first edge. The second main body part comprises a third edge and a fourth edge connected with the third edge. The first flow guide part connects the first edge and the second edge. The second flow guide part connects the third edge and the fourth edge. The first flow guide part is staggered with the second flow guide part in a thickness direction of the negative pole piece.

[0015] In some embodiments, the first main body part comprises a first edge and a second edge opposite to the first edge, and the first edge and the second edge are both provided with the first flow guide part. The second main body part comprises a third edge and a fourth edge opposite to the third edge, and the third edge and the fourth edge are both provided with the second flow guide part. The first flow guide part is staggered with the second flow guide part in a thickness direction of the negative pole piece.

[0016] The disclosure also provides a battery cell. The battery cell comprises the pole piece assembly according to any of the above embodiments.

[0017] In some embodiments, the battery cell comprises a housing, and the housing forms an accommodation space, and the separators, the positive pole pieces and the negative pole pieces are arranged in the accommodation space.

[0018] In some embodiments, the battery cell comprises a first fusion layer. The housing comprises a first shell and a second shell. The inside of the accommodation space of the first shell and the second shell is provided with a second fusion layer. The first fusion layer is arranged between two second fusion layers and is fused and packaged with the two second fusion layers.

[0019] The disclosure also provides a battery pack. The battery comprises the battery cell according to any of the above embodiments.

[0020] The disclosure also provides a power utilization device. The power utilization device comprises the battery pack of any of the above embodiments or the battery cell of any of the above embodiments.

[0021] The pole piece, the pole piece assembly, the battery cell, the battery pack and the power utilization device of the embodiments of the disclosure use the flow guide part arranged at different edges of the main body part of the pole piece as the output pole or the input pole, so that the overcurrent area of the output pole or the input pole is larger, the overcurrent capacity of the output pole or the input pole is better, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0022] Additional aspects and advantages of the disclosure will be in part apparent and in part pointed out hereinafter in the description of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0024] Fig. 1 is one of the perspective structural schematic diagrams of the pole piece of some embodiments of the disclosure;

[0025] Fig. 2 is another of the perspective structural schematic diagrams of the battery cell of some embodiments of the disclosure;

[0026] Fig. 3 is one of the perspective structural schematic diagrams of the battery cell of some embodiments of the disclosure;

[0027] Fig. 4 is another of the perspective structural schematic diagrams of the battery cell of some embodiments of the disclosure;

[0028] Fig. 5 is an exploded schematic diagram of the battery cell of Fig. 3;

[0029] Fig. 6 is an exploded schematic diagram of the battery cell of Fig. 4.

[0030] Main element reference numerals: battery cell 1000; pole piece assembly 100; pole piece 10; flow guide part 101, first flow guide section 1011, second flow guide section 1013; main body part 103, first main body edge 1031, second main body edge 1033, current collector 1035; coating layer 105; separator 11; positive pole piece 31; first main body part 311, first edge 3111, second edge 3113, positive current collector 3115; first flow guide part 313, first section 3131, second section 3133; first coating layer 317; negative pole piece 51; second main body part 511, third edge 5111, fourth edge 5113, negative current collector 5115; second flow guide part 513, third section 5131, fourth section 5133; second coating layer 517;

[0031] Housing 200, accommodation space 210, first shell 230, second shell 250, second fusion layer 270; first fusion layer 300. DETAILED DESCRIPTION

[0032] Embodiments of the present disclosure are described below in detail with reference to the accompanying drawings, in which examples of the embodiments are shown, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary, and are for the purpose of explaining the present disclosure only, and cannot be understood as a limitation of the present disclosure.

[0033] In the description of the present disclosure, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0034] In the description of the present disclosure, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be understood broadly, which can mean fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection or can communicate with each other; can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeatedly refer to numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0036] Embodiments of the present disclosure are described in detail below, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary, and are for the purpose of explaining the present disclosure only, and cannot be understood as a limitation of the present disclosure.

[0037] Referring to FIG. 1 or FIG. 2, the present disclosure provides a pole piece 10. The pole piece 10 comprises a current guide part 101 and a main body part 103 connected with the current guide part 101. The current guide part 101 is connected to at least two different edges of the main body part 103.

[0038] Specifically, in one embodiment, as shown in FIG. 1, any two adjacent edges of the four edges of the main body part 103 can be formed with the current guide part 101, so that the current of the pole piece 10 can be led out from multiple directions, increasing the overcurrent cross-sectional area and overcurrent of the pole piece 10, so that the distribution density of the current guide part 101 is relatively uniform, and a larger current can be guided.

[0039] In another embodiment, as shown in FIG. 2, any two non-adjacent edges of the four edges of the main body part 103 can be formed with the current guide part 101, so that the current of the pole piece 10 can be led out from multiple directions, increasing the overcurrent cross-sectional area and overcurrent of the pole piece 10, so that the distribution density of the current guide part 101 is relatively uniform, and a larger current can be guided.

[0040] It should be noted that the main body part 103 and the current guide part 101 can be integrally formed to reduce production cost.

[0041] In this way, the pole piece 10 of the embodiment of the present disclosure uses the current guide part 101 provided on different edges of the main body part 103 as an output pole or an input pole, so that the overcurrent area of the output pole or the input pole is larger, the current density distribution is more uniform, the overcurrent capacity of the output pole or the input pole is better, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0042] In some embodiments, the ratio of the length of the edge of the main body part 103 covered by the current guide part 101 to the total length of the edge of the main body part 103 is greater than or equal to 50%. That is, the embodiment of the present disclosure sets the ratio of the length of the edge of the main body part 103 covered by the current guide part 101 to the total length of the edge of the main body part 103 to be greater than or equal to 50%, so that the overcurrent area of the current guide part 101 is larger, the current distribution on the current guide part 101 is more uniform, and the overcurrent of the current guide part 101 is not limited by the local overcurrent density, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0043] In some embodiments, the current guide part 101 completely covers the edge of the main body part 103. That is, the embodiment of the present disclosure sets the current guide part 101 to completely cover the edge of the main body part 103, so that the overcurrent area of the current guide part 101 is maximum, the current distribution on the current guide part 101 is more uniform, and the overcurrent of the current guide part 101 is not limited by the local overcurrent density, and the fast charging and fast discharging requirements of the higher requirement battery can be further met.

[0044] Referring to FIG. 1, in some embodiments, the main body part 103 comprises a first main body edge 1031 and a second main body edge 1033 connected with the first main body edge 1031. The flow guide part 101 comprises a first flow guide section 1011 and a second flow guide section 1013 connected with the first flow guide section 1011 at a preset angle. The first flow guide section 1011 is connected to the first main body edge 1031. The second flow guide section 1013 is connected to the second main body edge 1033. That is, the present embodiment can further increase the current passing area of the flow guide part 101 by connecting the first flow guide section 1011 to the first main body edge 1031, connecting the second flow guide section 1013 to the second main body edge 1033, and connecting the first flow guide section 1011 and the second flow guide section 1013 at a preset angle, so that the current distribution on the flow guide part 101 is more uniform, and at the same time, the current passing of the flow guide part 101 is not limited by the local overcurrent density being too high, and can meet the fast charging and fast discharging requirements of higher requirement batteries. It should be noted that the preset angle can be, for example, 70°, 75°, 80°, 85°, or 90°, etc., which is not limited herein. As shown in FIG. 1, the flow guide part 101 can be L-shaped.

[0045] In some embodiments, the pole piece 10 comprises a coating layer 105. The main body part 103 comprises a current collector 1035. The coating layer 105 is arranged on the current collector 1035. That is, the present embodiment can facilitate the user to apply the active material on the coating layer 105 by arranging the coating layer 105 on one side or both sides of the current collector 1035.

[0046] Referring to FIGS. 3 to 6, the present disclosure provides a pole piece assembly 100. The pole piece assembly 100 comprises a plurality of separators 11 and a plurality of pole pieces 10 described above. The pole piece 10 comprises a positive pole piece 31 and a plurality of negative pole pieces 51. The separators 11, the positive pole pieces 31 and the negative pole pieces 51 are arranged alternately and stacked. The positive pole piece 31 comprises a first flow guide part 313 and a first main body part 311 connected with the first flow guide part 313, the first main body part 311 can be stacked with the separator 11, and the first flow guide part 313 is connected to at least two different edges of the first main body part 311; and / or, the negative pole piece 51 comprises a second flow guide part 513 and a second main body part 511 connected with the second flow guide part 513. The second main body part 511 can be stacked with the separator 11. The second flow guide part 513 is connected to at least two edges of the second main body part 511.

[0047] Specifically, the two surfaces of the separator 11 can be respectively provided with glue, and the separator 11, the positive pole piece 31 and the negative pole piece 51 can be alternately stacked and fused into one body by the glue, so that the positive pole piece 31 and the negative pole piece 51 can be insulated by the separator 11. It should be noted that the glue can be a hot melt adhesive.

[0048] In one embodiment, as shown in FIG. 3, the first body part 311, the second body part 511 and the diaphragm 11 can be alternately stacked and fusion set, so that any two adjacent edges of the four edges of the plurality of first body parts 311 after stacked and fusion set form the first current guide part 313, and any two adjacent edges of the four edges of the plurality of second body parts 511 after stacked and fusion set form the second current guide part 513, so that the current of the pole piece assembly 100 can be led out from multiple directions, the cross-sectional area of overcurrent and overcurrent of the pole piece assembly 100 are increased, and the distribution density of the first current guide part 313 and the second current guide part 513 is relatively uniform, so that the first current guide part 313 and the second current guide part 513 can guide a larger current.

[0049] In another embodiment, as shown in FIG. 4, the first body part 311, the second body part 511 and the diaphragm 11 can be alternately stacked and fusion set, so that any two non-adjacent edges of the four edges of the plurality of first body parts 311 after stacked and fusion set form the first current guide part 313, and any two non-adjacent edges of the four edges of the plurality of second body parts 511 after stacked and fusion set can be provided with the second current guide part 513, so that the current of the pole piece assembly 100 can be led out from multiple directions, the cross-sectional area of overcurrent and overcurrent of the pole piece assembly 100 are increased, and the distribution density of the first current guide part 313 and the second current guide part 513 is relatively uniform, so that the first current guide part 313 and the second current guide part 513 can guide a larger current.

[0050] It should be noted that the first body part 311 and the first current guide part 313 can be integrally formed, and the second body part 511 and the second current guide part 513 can also be integrally formed, so as to reduce the production cost.

[0051] In this way, the pole piece assembly 100 of the embodiment of the present disclosure uses the current guide part 101 provided at different edges of the body part 103 as the output pole or the input pole, so that the overcurrent area of the output pole or the input pole is larger, the current density distribution is relatively uniform, the overcurrent capacity of the output pole or the input pole is better, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0052] It can be understood that the embodiment of the present disclosure increases the overcurrent area of the current input end and the output end by providing the first current guide part 313 at at least two different edges of the first body part 311 and protruding from the edge of the diaphragm 11, providing the second current guide part 513 at at least two different edges of the second body part 511 and protruding from the edge of the diaphragm 11, and using the first current guide part 313 provided at the plurality of edges of the first body part 311 and the second current guide part 513 provided at the plurality of edges of the second body part 511 as the current input end and the output end of the pole piece assembly 100, so that the current distribution on the first current guide part 313 and the second current guide part 513 is relatively uniform, and the overcurrent of the first current guide part 313 and the second current guide part 513 is not limited by the local overcurrent density.

[0053] Compared with the prior art of additionally arranging the tab on the pole piece assembly 100, the first flow guide part 313 led out by the first main body part 311 and the second flow guide part 513 led out by the second main body part 511 are directly used as the current input end and the output end of the pole piece assembly 100, without the need to separately weld the tab on the current single body, which can reduce the parts and materials of the pole piece assembly 100 and a welding process, and reduce the production cost of the pole piece assembly 100.

[0054] In some embodiments, the first flow guide part 313 protrudes from different edges of the diaphragm 10. The negative pole piece 51 includes a second flow guide part 513. The second flow guide part 513 protrudes from different edges of the diaphragm 10. The first flow guide part 313 and the second flow guide part 513 are arranged at intervals.

[0055] In one embodiment, as shown in FIG. 3, the positive pole piece 31, the negative pole piece 51 and the diaphragm 11 can be alternately stacked and fused, so that any two adjacent edges of the four edges of the stacked and fused plurality of first main body parts 311 can be formed with the first flow guide part 313 protruding from the edge of the diaphragm 11, and any two adjacent edges of the four edges of the stacked and fused plurality of second main body parts 511 can be provided with the second flow guide part 513 protruding from the edge of the diaphragm 11, and the first flow guide part 313 and the second flow guide part 513 can be arranged at a predetermined distance, so that the current of the pole piece assembly 100 can be led out from multiple directions, increase the overcurrent cross-sectional area and overcurrent of the pole piece assembly 100, so that the distribution density of the first flow guide part 313 and the second flow guide part 513 is relatively uniform, and a larger current can be guided.

[0056] In another embodiment, as shown in FIG. 4, the positive pole piece 31, the negative pole piece 51 and the diaphragm 11 can be alternately stacked and fused, so that any two non-adjacent edges of the four edges of the stacked and fused plurality of first main body parts 311 can be provided with the first flow guide part 313 protruding from the edge of the diaphragm 11, and any two non-adjacent edges of the four edges of the stacked and fused plurality of second main body parts 511 can be provided with the second flow guide part 513 protruding from the edge of the diaphragm 11, and the first flow guide part 313 and the second flow guide part 513 can be arranged at a predetermined distance, so that the current of the pole piece assembly 100 can be led out from multiple directions, increase the overcurrent cross-sectional area and overcurrent of the pole piece assembly 100, so that the distribution density of the first flow guide part 313 and the second flow guide part 513 is relatively uniform, and a larger current can be guided.

[0057] It should be noted that the predetermined distance can be, for example, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, which is not limited herein.

[0058] Please combine FIG. 3 and FIG. 5, in some embodiments, the first main body part 311 includes a first edge 3111 and a second edge 3113 connected to the first edge 3111, the second main body part 511 includes a third edge 5111 and a fourth edge 5113 connected to the third edge 5111, the first flow guide part 313 connects the first edge 3111 and the second edge 3113, the second flow guide part 513 connects the third edge 5111 and the fourth edge 5113, and the first flow guide part 313 is staggered with the second flow guide part 513 along the thickness direction of the negative plate 51.

[0059] That is, the embodiments of the present disclosure connect the first flow guide part 313 to the first edge 3111 and the second edge 3113 connected to the first edge 3111 of the first main body part 311, and the second flow guide part 513 to the third edge 5111 and the fourth edge 5113 connected to the third edge 5111 of the second main body part 511, and the first flow guide part 313 can be staggered with the second flow guide part 513 along the thickness direction of the negative plate 51, so that the user can set the first flow guide part 313 at the first edge 3111 and the second edge 3113 of the first main body part 311, and the second flow guide part 513 at the third edge 5111 and the fourth edge 5113 of the second main body part 511 as the current input end and the output end of the plate assembly 100, thereby increasing the overcurrent area of the current input end and the output end, so that the current distribution on the first flow guide part 313 and the second flow guide part 513 is more uniform, and at the same time, the overcurrent of the first flow guide part 313 and the second flow guide part 513 is not limited by the local overcurrent density, and the higher requirements of the battery for fast charging and fast discharging can be met.

[0060] Please refer to FIG. 4 and FIG. 6, in some embodiments, the first flow guide part 313 includes a first segment 3131 connected to the first edge 3111 and a second segment 3133 connected to the first segment 3131 at a preset angle, and / or the second flow guide part 513 includes a third segment 5131 connected to the third edge 5111 and a fourth segment 5133 connected to the third segment 5131 at a preset angle. That is, by connecting the first segment 3131 to the first edge 3111, the second segment 3133 to the second edge 3113, the third segment 5131 to the third edge 5111, and the fourth segment 5133 to the fourth edge 5113, and connecting the first segment 3131 and the second segment 3133 at a preset angle and connecting the third segment 5131 and the fourth segment 5133 at a preset angle, the present disclosure can further increase the current-carrying area of the first flow guide part 313 and the second flow guide part 513, so that the current distribution on the first flow guide part 313 and the second flow guide part 513 is more uniform, and at the same time, the current-carrying of the first flow guide part 313 and the second flow guide part 513 is not limited by the local overcurrent density, which can meet the higher requirements of the fast charging and fast discharging of the battery. It should be noted that the preset angle can be, for example, 70°, 75°, 80°, 85°, or 90°, etc., which is not limited herein. As shown in FIG. 5, the first flow guide part 313 and the second flow guide part 513 can both be L-shaped.

[0061] Please refer to FIG. 4 and FIG. 6, in some embodiments, the first main body part 311 includes a first edge 3111 and a second edge 3113 opposite to the first edge 3111. The first edge 3111 and the second edge 3113 are both provided with the first flow guide part 313. The second main body part 511 includes a third edge 5111 and a fourth edge 5113 opposite to the third edge 5111. The third edge 5111 and the fourth edge 5113 are both provided with the second flow guide part 513. The first flow guide part 313 and the second flow guide part 513 are staggered along the thickness direction of the negative plate 51.

[0062] That is, in the embodiment of the present disclosure, the first flow guide portions 313 are respectively arranged at the first edge 3111 and the second edge 3113 opposite to the first edge 3111 of the first main body portion 311, the second flow guide portions 513 are respectively arranged at the third edge 5111 and the fourth edge 5113 opposite to the third edge 5111 of the second main body portion 511, and the first flow guide portions 313 and the second flow guide portions 513 can be staggered along the thickness direction of the negative plate 51. Therefore, the user can take the first flow guide portions 313 arranged at the first edge 3111 and the second edge 3113 of the first main body portion 311 and the second flow guide portions 513 arranged at the third edge 5111 and the fourth edge 5113 of the second main body portion 511 as two current input terminals and output terminals of the plate assembly 100, thereby increasing the overcurrent area of the current input terminals and output terminals, and making the current distribution on the first flow guide portions 313 and the second flow guide portions 513 more uniform, while the overcurrent of the first flow guide portions 313 and the second flow guide portions 513 is not limited by the excessively high local overcurrent density, and the fast charging and discharging requirements of the higher requirement battery can be met.

[0063] In some embodiments, the ratio of the length of the edge of the first main body portion 311 covered by the first flow guide portion 313 to the total length of the edge of the first main body portion 311 is greater than or equal to 50%, and the ratio of the length of the edge of the second main body portion 511 covered by the second flow guide portion 513 to the total length of the edge of the second main body portion 511 is greater than or equal to 50%. That is, in the embodiment of the present disclosure, the ratio of the length of the edge of the first main body portion 311 covered by the first flow guide portion 313 to the total length of the edge of the first main body portion 311 is greater than or equal to 50%, and the ratio of the length of the edge of the second main body portion 511 covered by the second flow guide portion 513 to the total length of the edge of the second main body portion 511 is greater than or equal to 50%, so that the overcurrent area of the first flow guide portions 313 and the second flow guide portions 513 is large, the current distribution on the first flow guide portions 313 and the second flow guide portions 513 is more uniform, while the overcurrent of the first flow guide portions 313 and the second flow guide portions 513 is not limited by the excessively high local overcurrent density, and the fast charging and discharging requirements of the higher requirement battery can be met.

[0064] In some embodiments, the first flow guide part 313 completely covers the edge of the first main body part 311, and the second flow guide part 513 completely covers the edge of the second main body part 511. That is, the present embodiment completely covers the edge of the first main body part 311 with the first flow guide part 313 and completely covers the edge of the second main body part 511 with the second flow guide part 513, so that the current distribution on the first flow guide part 313 and the second flow guide part 513 is more uniform, and the current capacity of the first flow guide part 313 and the second flow guide part 513 is not limited by the local current density, which can further meet the fast charging and fast discharging requirements of higher requirements of the battery.

[0065] In some embodiments, the positive electrode sheet 31 includes a first coating layer 317. The first main body part 311 includes a positive electrode current collector 3115. The first coating layer 317 is arranged on the positive electrode current collector 3115. The negative electrode sheet 51 includes a second coating layer 517, and the second main body part 511 includes a negative electrode current collector 5115. The second coating layer 517 is arranged on the negative electrode current collector 5115. That is, the present embodiment is provided with the first coating layer 317 on one side or both sides of the positive electrode current collector 3115 and the second coating layer 517 on one side or both sides of the negative electrode current collector 5115, so that the user can coat the positive electrode active material on the first coating layer 317 and the negative electrode active material on the second coating layer 517.

[0066] It should be noted that when the separator 11, the positive electrode sheet 31 and the negative electrode sheet 51 are alternately stacked, if the positive electrode sheet 31 is in the outermost layer, the first coating layer 317 can not be arranged on the side of the outermost positive electrode sheet 31 away from the separator 11, so as to reduce the production cost. When the separator 11, the positive electrode sheet 31 and the negative electrode sheet 51 are alternately stacked, if the negative electrode sheet 51 is in the outermost layer, the second coating layer 517 can not be arranged on the side of the outermost negative electrode sheet 51 away from the separator 11, so as to reduce the production cost.

[0067] Referring to FIG. 1, the present disclosure provides a battery monomer 1000. The battery monomer 1000 includes the electrode sheet assembly 100 described above. The specific structure of the electrode sheet assembly 100 is as described above, and is not repeated here for the sake of brevity.

[0068] Therefore, the battery monomer 1000 of the present embodiment uses the flow guide part 101 arranged on the different edges of the main body part 103 as the output pole or the input pole, so that the current capacity of the output pole or the input pole is larger, the current density distribution is more uniform, and the current capacity of the output pole or the input pole is better, which can further meet the fast charging and fast discharging requirements of higher requirements of the battery.

[0069] Referring to FIG. 5 or FIG. 6, in some embodiments, the battery cell 1000 includes a housing 200. The housing 200 is formed with an accommodation space 210. The separator 11, the positive electrode sheet 31, and the negative electrode sheet 51 are disposed in the accommodation space 210. That is, after the separator 11, the positive electrode sheet 31, and the negative electrode sheet 51 are alternately stacked to form a battery core, the housing 200 can be disposed on both sides of the battery core, and the battery core can be disposed in the accommodation space 210 to protect the battery core by the housing 200. It should be noted that when the thickness of the battery core is relatively small, the housing 200 disposed on one of the two sides of the battery core can be a flat surface without a groove. The housing 200 can be, for example, an aluminum-plastic composite film, without limitation. The metal aluminum on the outermost positive electrode sheet 31 or negative electrode sheet 51 of the battery core can be individually wrapped with a layer of separator 11 to prevent the current collector of the positive electrode sheet 31 or the current collector of the negative electrode sheet 51 from directly contacting the housing 200.

[0070] In some embodiments, the battery cell 1000 includes a first fusion layer 300. The housing 200 includes a first shell 230 and a second shell 250. The inside of the accommodation space 210 of the first shell 230 and the second shell 250 is provided with a second fusion layer 270, and the first fusion layer 300 is disposed between and fused with the two second fusion layers 270.

[0071] Specifically, the first shell 230 and the second shell 250 can each be composed of a nylon layer, an aluminum layer, and a second fusion layer 270. The nylon layer can be disposed as the outermost layer of the first shell 230 and the second shell 250, the aluminum layer can be disposed as the middle layer of the first shell 230 and the second shell 250, and the second fusion layer 270 can be disposed as the inner layer of the first shell 230 and the second shell 250. The first fusion layer 300 is disposed between and adhered to the two second fusion layers 270, and the first fusion layer 300 and the second fusion layer 270 can be fused and packaged by using a hot-press sealing process.

[0072] It should be noted that the first fusion layer 300 and the second fusion layer 270 can be made of a thermoplastic synthetic resin material, so that the user can fuse and package the first fusion layer 300 and the second fusion layer 270 by using a hot-press sealing process, and PP is preferably selected.

[0073] In addition, when the first fusion layer 300 is arranged between and fused with the two second fusion layers 270, one side or corner of the first fusion layer 300 and the second fusion layer 270 can be provided with an injection port to facilitate subsequent injection of electrolyte into the battery monomer 1000 through the injection port. It should be noted that after the user injects electrolyte into the battery monomer 1000 through the injection port, the injection port can be heat sealed to prevent leakage of the electrolyte injected into the battery monomer 1000. Then, after heat sealing the injection port, the battery monomer 1000 can be heated and pressurized to form, so that the hot melt glue on the diaphragm 11 is melted, and the positive plate 31, the negative plate 51 and the diaphragm 11 are fused into a whole, thereby increasing the rigidity of the battery monomer 1000.

[0074] The present disclosure also provides a battery pack. The battery pack includes a plurality of the battery monomer 1000 described above. The specific structure of the battery monomer 1000 is as described above, and is not repeated here for the sake of brevity of the article. It should be noted that the battery monomer 1000 can be rectangular to facilitate subsequent stacking of the battery monomer 1000.

[0075] In this way, the battery pack of the embodiment of the present disclosure uses the flow guide part 101 arranged at different edges of the main body part 103 as the output pole or the input pole, so that the overcurrent area of the output pole or the input pole is larger, the current density distribution is more uniform, the overcurrent capacity of the output pole or the input pole is better, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0076] The present disclosure also provides a power consuming device. The power consuming device includes the battery pack described above. The specific battery pack is as described above, and is not repeated here for the sake of brevity of the article. It should be noted that the power consuming device can refer to a vehicle or a household appliance, etc.

[0077] In this way, the power consuming device of the embodiment of the present disclosure uses the flow guide part 101 arranged at different edges of the main body part 103 as the output pole or the input pole, so that the overcurrent area of the output pole or the input pole is larger, the current density distribution is more uniform, the overcurrent capacity of the output pole or the input pole is better, and the fast charging and fast discharging requirements of the higher requirement battery can be met.

[0078] The above embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present disclosure. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the scope of protection of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. An electrode (10), the electrode (10) comprising: A flow guide (101) and a main body (103) connected to the flow guide (101), the flow guide (101) being connected to at least two different edges of the main body (103).

2. The electrode (10) according to claim 1, wherein the length of the guide portion (101) covering at least one edge of the main body portion (103) is greater than or equal to 50% of the total length of the at least one edge of the main body portion (103).

3. The electrode (10) according to claim 2, wherein the flow guide (101) completely covers at least one edge of the main body (103).

4. The electrode according to claim 1, wherein the main body (103) includes a first main body edge (1031) and a second main body edge (1033) connected to the first main body edge (1031), and the flow guiding part (101) includes a first flow guiding section (1011) and a second flow guiding section (1013) connected to the first flow guiding section (1011) at a predetermined angle, wherein the first flow guiding section (1011) is connected to the first main body edge (1031), and the second flow guiding section (1013) is connected to the second main body edge (1033).

5. The electrode according to claim 1, wherein the electrode includes a dressing layer (105), the main body (103) includes a current collector (1035), and the dressing layer (105) is disposed on the current collector (1035).

6. An electrode assembly (100), the electrode assembly (100) comprising: Multiple diaphragms (11); The electrode (10) according to any one of claims 1-5, the electrode (10) comprising a positive electrode (31) and a negative electrode (51), wherein the positive electrode (31), the separator (11) and the negative electrode (51) are alternately stacked; The positive electrode (31) includes a first flow guide (313) and a first main body (311) connected to the first flow guide (313), wherein the first flow guide (313) is connected to at least two different edges of the first main body (311); and / or, the negative electrode (51) includes a second flow guide (513) and a second main body (511) connected to the second flow guide (513), wherein the second flow guide (513) is connected to at least two different edges of the second main body (511).

7. The electrode assembly (100) according to claim 6, wherein the first flow guide (313) protrudes from different edges of the diaphragm (11), the second flow guide (513) protrudes from different edges of the diaphragm (11), and the first flow guide (313) and the second flow guide (513) are spaced apart.

8. The electrode assembly (100) according to claim 6, wherein the first body portion (311) includes a first edge (3111) and a second edge (3113) connected to the first edge (3111), the second body portion (511) includes a third edge (5111) and a fourth edge (5113) connected to the third edge (5111), the first flow guide portion (313) connects the first edge (3111) and the second edge (3113), the second flow guide portion (513) connects the third edge (5111) and the fourth edge (5113), and the first flow guide portion (313) and the second flow guide portion (513) are offset along the thickness direction of the negative electrode (51).

9. The electrode assembly (100) according to claim 6, wherein the first main body (311) includes a first edge (3111) and a second edge (3113) opposite to the first edge (3111), and both the first edge (3111) and the second edge (3113) are provided with the first flow guide (313); The second main body (511) includes a third edge (5111) and a fourth edge (5113) opposite to the third edge (5111), and both the third edge (5111) and the fourth edge (5113) are provided with the second guide portion (513); The first flow guide (313) and the second flow guide (513) are offset along the thickness direction of the negative electrode (51).

10. A battery cell (1000) comprising an electrode assembly (100) according to any one of claims 6-9.

11. The battery cell (1000) according to claim 10, wherein the battery cell (1000) includes a housing (200), the housing (200) having a receiving space (210), and the separator (11), the positive electrode (31) and the negative electrode (51) are disposed in the receiving space (210).

12. The battery cell (1000) according to claim 11, wherein the battery cell (1000) includes a first fusion layer (300), the outer shell (200) includes a first shell (230) and a second shell (250), a second fusion layer (270) is disposed inside the accommodating space (210) of the first shell (230) and the second shell (250), and the first fusion layer (300) is disposed between the two second fusion layers (270) and fused and encapsulated with the two second fusion layers (270).

13. A battery pack comprising a plurality of battery cells (1000) as described in any one of claims 10-12.

14. An electrical appliance, characterized in that, The electrical equipment includes the battery pack of claim 13 or the battery cell (1000) of any one of claims 10-12.

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