CN219959042U - Pole piece, battery and electric vehicle - Google Patents

Pole piece, battery and electric vehicle Download PDF

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Publication number
CN219959042U
CN219959042U CN202223416918.3U CN202223416918U CN219959042U CN 219959042 U CN219959042 U CN 219959042U CN 202223416918 U CN202223416918 U CN 202223416918U CN 219959042 U CN219959042 U CN 219959042U
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China
Prior art keywords
pole piece
connectors
welding
tab
connector
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Active
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CN202223416918.3U
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Chinese (zh)
Inventor
何焱
华菲
郭思洋
石国露
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Microvast Power Systems Huzhou Co Ltd
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Microvast Power Systems Huzhou Co Ltd
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Priority to CN202223416918.3U priority Critical patent/CN219959042U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model provides a pole piece, a battery and an electric vehicle. The pole piece comprises a pole piece main body part and a pole piece connecting part connected with the pole piece main body part, wherein the pole piece connecting part is provided with at least two connectors which are independently arranged along a first direction, and the connectors are configured to be welded and connected with the pole lugs. The technical scheme of the utility model solves the problem that the pole piece in the prior art is easy to generate welding mark tearing in the multi-section welding process.

Description

Pole piece, battery and electric vehicle
Technical Field
The utility model relates to the technical field of soft-package lithium batteries, in particular to a pole piece, a battery and an electric vehicle.
Background
The lithium battery comprises a pole piece and a pole lug, wherein the pole piece comprises a pole piece main body part and a pole piece connecting part connected to the side edge of the pole piece main body part, one end of the pole lug is welded with the busbar, and the other end of the pole lug is welded with the pole piece connecting part of the pole piece. The high multiplying power is one of the excellent performances of the lithium battery, and the multiplying power is related to the total width of welding marks of the pole piece and the pole lug. Therefore, welding of the wide tab and wide pole piece connection is a current trend.
The ultrasonic welding process is used for welding the lithium battery tab, and when the welding width is too wide (more than 30 mm), the parallelism between the welding head and the welding seat is difficult to ensure, so that one end of the welding mark is overselded, and the other end is in cold joint. The welding width refers to the width of the welding mark in the length direction of the side edge of the pole piece main body part connected with the pole piece connecting part.
In the prior art, in order to improve the above problems, multi-stage welding, such as two-stage welding, is generally used. The multi-section welding divides a section of wider welding mark into a plurality of sections and welds the sections in sequence. However, the problem of tearing of the weld mark of the previous weld due to vibration pulling occurs at the time of the post-welding.
Disclosure of Invention
The utility model mainly aims to provide a pole piece, a battery and an electric vehicle, so as to solve the problem that a pole piece in the prior art is easy to generate welding and tearing in a multi-section welding process.
In order to achieve the above object, the present utility model provides a pole piece, including a pole piece main body portion and a pole piece connecting portion connected with the pole piece main body portion, the pole piece connecting portion having at least two connectors independently arranged along a first direction, the connectors being configured to be capable of welding connection with tabs.
Further, the pole piece connecting part further comprises a connecting body, the connector is connected to the pole piece main body part through the connecting body, and the connecting body and the connector connected with the connecting body form a sub-connecting piece.
Further, the pole piece connecting part comprises a sub-connecting piece, and the sub-connecting piece comprises at least two connectors;
or, the pole piece connecting part comprises at least two sub-connecting pieces which are independently arranged along the first direction, and each sub-connecting piece comprises a connector;
or, the pole piece connecting part comprises at least two sub-connecting pieces which are independently arranged along the first direction, and at least two connectors are connected to the same connecting body.
Further, the adjacent two sub-connectors have a spacing n along the first direction 1 And/or the adjacent two connectors connected to the same connecting body have a distance n along the first direction 2 。
Further, from the connection head to the pole piece main body part, the distance n 1 Is a fixed value or gradually decreases, and/or the spacing n 2 Is a fixed value or gradually decreases.
Further, two end surfaces of the adjacent two sub-connectors, which are close to each other, and/or two end surfaces of the adjacent two connectors connected to the same connecting body, which are close to each other, are arc-shaped surfaces or planes.
Further, the interval between the adjacent two sub-connectors and/or the interval between the adjacent two connectors connected to the same connecting body has a rectangular or trapezoidal or V-shaped or U-shaped cross section perpendicular to the thickness direction of the pole piece connecting portion.
Further, the connector comprises a connecting end far away from the pole piece main body part; the width of the connecting ends in the first direction is N, the width N of each connecting end is the same, and the interval N between two adjacent connecting ends in the first direction meets the following conditions: n is more than 0mm and less than or equal to 0.1N.
Further, the connector comprises a connecting end far away from the pole piece main body part; the width of the connecting end in the first direction is N, and the width N of the connecting end is greater than or equal to 5mm and less than or equal to 50mm.
Further, the width N of the connecting end is greater than or equal to 10mm and less than or equal to 30mm.
According to another aspect of the utility model, the utility model provides a battery, comprising the pole piece, wherein the pole piece is a positive pole piece and/or a negative pole piece.
Further, the battery also comprises a positive lug and a negative lug, the positive plate is welded with the positive lug through a positive connector, the positive lug comprises at least two corresponding positive lug welding parts which are independently arranged along the first direction, and each positive lug welding part of the positive lug is welded with each positive connector of the positive plate one to one; and/or the negative electrode tab is welded with the negative electrode tab through the negative connector, the negative electrode tab comprises at least two corresponding negative electrode tab welding parts which are independently arranged along the first direction, and each negative electrode tab welding part of the negative electrode tab is welded with each negative connector of the negative electrode tab one to one.
According to another aspect of the present utility model, there is provided an electric vehicle including the above battery.
By applying the technical scheme of the utility model, the end part of the pole piece connecting part, which is used for being welded with the pole lug, is divided into at least two parts (namely at least two connectors) along the first direction, and in the multi-section welding process, as the connectors are independently arranged, the connectors can be sequentially separated to be welded with the pole lug, so that the welding process of the connectors is not interfered with each other, the influence of vibration caused by later welding on welding marks of the prior welding can be relieved, the problem that the welding marks of the prior welding are easy to tear is avoided, and the welding effect is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 shows a schematic structural view of a first embodiment of a pole piece of the present utility model;
FIG. 2 shows another schematic structural view of a first embodiment of the pole piece of the present utility model;
FIG. 3 shows another schematic structural view of a first embodiment of the pole piece of the present utility model;
FIG. 4 shows another schematic structural view of a first embodiment of the pole piece of the present utility model;
FIG. 5 shows a schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 6 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 7 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 8 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 9 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 10 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 11 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 12 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
FIG. 13 shows another schematic structural view of a second embodiment of the pole piece of the present utility model;
fig. 14 shows a schematic structural view of a third embodiment of the pole piece of the present utility model;
fig. 15 shows a schematic structural view of an embodiment of the battery of the present utility model;
fig. 16 shows another structural schematic of an embodiment of the battery of the present utility model;
fig. 17 is a schematic view showing the structure of an embodiment of a tab of the battery of the present utility model;
fig. 18 shows another structural schematic diagram of an embodiment of a tab of the battery of the present utility model.
Wherein the above figures include the following reference numerals:
1. a pole piece main body part; 2. a pole piece connecting part; 21. a sub-connector; 3. a connector; 31. a positive connector; 32. a negative connector; 4. a positive electrode tab; 41. a positive tab welding portion; 5. a negative electrode ear; 51. a negative electrode tab welding portion; 6. a connection body; 7. a connection end; 11. a positive plate; 12. a negative plate.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
It should be noted that the pole piece according to the embodiment of the present utility model does not include a tab. A pole piece assembly comprises a pole piece and a pole lug connected with a pole piece connecting part of the pole piece.
As shown in fig. 1-18, an embodiment of the present utility model provides a pole piece. The pole piece comprises a pole piece body part 1 and a pole piece connecting part 2 connected with the pole piece body part 1, wherein the pole piece connecting part 2 is provided with at least two connectors 3 which are independently arranged along a first direction, and the connectors 3 are configured to be capable of being welded and connected with the pole lugs.
In the above technical scheme, the end part used for welding with the tab on the pole piece connecting part 2 is divided into at least two parts (namely at least two connectors 3) along the first direction, and in the multi-section welding process, as the connectors 3 are independently arranged, the connectors 3 can be separated from the tab in sequence, so that the welding process of the connectors 3 is not interfered with each other, the influence of vibration caused by later welding on welding marks of the prior welding can be relieved, the problem that the welding marks of the prior welding are easy to tear is avoided, and the welding effect is improved.
In the embodiment of the present utility model, the welding order of the connectors 3 is not limited.
In the embodiment of the present utility model, the end portion of one wider pole piece connecting portion 2 for welding with the tab is divided into at least two connectors 3 during die cutting, and multi-stage welding can be adopted after lamination.
As shown in fig. 5 and 6, in one embodiment of the present utility model, the number of the connectors 3 may be two or three or more.
Preferably, in the embodiment of the present utility model, the pole piece connection part 2 is integrally formed with the pole piece main body part 1, and the pole piece connection part 2 is connected with the bus bar through the tab.
In the embodiment of the present utility model, as shown in fig. 2, the first direction refers to the longitudinal direction of the side edge of the pole piece main body 1 to which the pole piece connecting portion 2 is connected.
As shown in fig. 14, in the embodiment of the present utility model, the pole piece connecting portion 2 further includes a connecting body 6, the connector 3 is connected to the pole piece main body portion 1 through the connecting body 6, and the connecting body 6 and the connector 3 connected thereto form a sub-connector 21.
As shown in fig. 5, in the embodiment of the present utility model, the connection head 3 includes a connection end 7 remote from the pole piece body part 1; the width of the connection ends 7 in the first direction is N, the width N of each connection end 7 is the same, and the interval N between two adjacent connection ends 7 in the first direction satisfies: n is more than 0mm and less than or equal to 0.1N.
In the above technical solution, on one hand, the interval n is formed by cutting the whole pole piece connecting portion 2, and the above interval range can avoid excessively cutting the pole piece connecting portion 2, so that the waste of materials of the pole piece connecting portion 2 can be avoided; on the other hand, when the width of the pole piece connecting portion 2 and the number of the connecting heads 3 are determined, the above-mentioned pitch range avoids the problem that the welding strength is affected by too small a width of each connecting end 7.
Specifically, in the embodiment of the present utility model, the connector 3 includes a connection end 7 remote from the pole piece main body portion 1; the width of the connection end 7 in the first direction is N, and the width N of the connection end 7 is greater than or equal to 5mm and less than or equal to 50mm. In this way, the connecting end 7 can have a wide enough width, so that the pole piece connecting part 2 can have enough overcurrent capacity, and the problem of uneven cold welding or welding caused by the too wide width of the connecting end 7 can be avoided.
Preferably, in an embodiment of the utility model, the width N of the connection end 7 is greater than or equal to 10mm and less than or equal to 30mm.
Preferably, in one embodiment of the present utility model, the spacing n between two adjacent connection ends 7 in the first direction is 1mm-3mm or 0.5mm-5mm; preferably, it is: 1.5mm, 2mm, 2.5mm.
As shown in fig. 11, in one embodiment of the present utility model, the widths N of the plurality of connection terminals 7 are the same.
As shown in fig. 12, in another embodiment of the present utility model, the widths N of the plurality of connection terminals 7 may be different.
Example 1
Fig. 1 to 4 are schematic structural views of a first embodiment of a pole piece according to the present utility model. In the first embodiment of the present utility model, the pole piece connecting portion 2 includes a sub-connecting piece, and each connecting head 3 is connected to the same connecting body 6.
Through the arrangement, the pole piece is connected with the pole lugs through the connectors 3, and the connectors 3 are separated from the pole lugs in sequence for welding in the multi-section welding process, so that the influence of vibration caused by later welding on welding marks of the prior welding can be relieved, the problem that the welding marks of the prior welding are easy to tear is avoided, and the welding effect is improved. In the above embodiment, the number of the connecting bodies 6 is one, and the connecting head 3 is welded with the pole piece main body part 1 through one connecting body 6, so that the connecting body 6 does not need to be cut.
As shown in fig. 1 to 4, in the first embodiment of the present utility model, a distance n is provided between two adjacent connectors 3 connected to the same connector body 6 along the first direction 2 。
Through the arrangement, in the multi-section welding process, when at least two connectors 3 are separated in sequence and welded with the tab, the adjacent two connectors 3 are provided with a spacing distance n 2 The operation space can be reserved, so that the welding processes of the connectors 3 are not interfered with each other, in the subsequent welding process, the problem that the welding mark of the previous section is torn due to vibration pulling can be avoided, and the welding head of the subsequent welding can be prevented from being pressed on the welding mark of the previous section, so that repeated welding is avoided.
As shown in fig. 1 to 4, in the first embodiment of the present utility model, the pitch n from the connection head 3 to the tab body 1 2 Is a fixed value or gradually decreases. Like this, can make two adjacent connector 3 interval setting to can make the welding process of two adjacent connector 3 not interfere each other, in the in-process of the welding of the connector 3 of later one, can avoid appearing the vibration and pull the welding of former section and lead to the problem that the welding of former section was torn.
As shown in fig. 1 to 4, in the first embodiment of the present utility model, two end surfaces of two adjacent connectors 3 connected to the same connecting body 6, which are close to each other, are arc surfaces or flat surfaces. The structure is simple and convenient to process.
In fig. 1, two adjacent connectors 3 connected to the same connector body 6 are a first connector and a second connector, wherein two end faces of the two adjacent connectors 3 close to each other are a third end face c of the first connector facing the second connector, and a fourth end face d of the second connector facing the first connector.
As shown in fig. 1 to 4, in the first embodiment of the present utility model, the interval between two adjacent connection heads 3 connected to the same connection body 6 is rectangular or trapezoidal or V-shaped or U-shaped in shape in a cross section perpendicular to the thickness direction of the pole piece connection portion 2. The shape can realize that two adjacent connectors 3 are independently arranged, so that the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is pulled by vibration is avoided.
Example two
Fig. 5 to 13 are schematic structural views of a second embodiment of the pole piece of the present utility model.
The embodiment of the present utility model is different from the first embodiment in that the pole piece connecting portion 2 includes at least two sub-connecting members 21 independently arranged in the first direction, and each sub-connecting member 21 includes one connecting head 3.
Through the arrangement, in the battery module, the adjacent two sub-connectors 21 are independently arranged, and the adjacent two connectors 3 can be independently arranged, so that the welding processes of the adjacent two connectors 3 are not interfered with each other, and the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is vibrated and pulled in the welding process of the next connector 3 can be avoided.
As shown in fig. 5 to 13, in the second embodiment of the present utility model, in the first direction, two adjacent sub-connectors 21 have a spacing n along the first direction 1 。
Through the arrangement, the two adjacent sub-connecting pieces 21 can be arranged at intervals, so that the connectors 3 are arranged at intervals, and in the subsequent welding process, the problem that the welding mark of the previous section is torn due to vibration pulling can be avoided, and the welding head of the subsequent welding can be prevented from being pressed on the welding mark of the previous section, so that the problem of repeated welding is avoided.
As shown in fig. 5 to 13, in the second embodiment of the present utility model, the pitch n from the connection head 3 to the tab body 1 1 Is a fixed value or gradually decreases. Like this, can make two adjacent connector 3 interval setting to can make the welding process of two adjacent connector 3 not interfere each other, in the in-process of the welding of the connector 3 of later one, can avoid appearing the vibration and pull the welding of former section and lead to the problem that the welding of former section was torn.
As shown in fig. 5 to 13, in the second embodiment of the present utility model, two end surfaces of two adjacent sub-connectors 21, which are close to each other, are arc surfaces or flat surfaces. The structure is simple and convenient to process.
In fig. 8, two adjacent sub-connectors 21 are a first sub-connector and a second sub-connector, respectively, wherein two end faces of the two adjacent sub-connectors 21 close to each other are a first end face a of the first sub-connector facing the second sub-connector and a second end face b of the second sub-connector facing the first sub-connector.
As shown in fig. 5 to 13, in the second embodiment of the present utility model, the interval between two adjacent sub-connectors 21 is rectangular or trapezoidal or V-shaped or U-shaped in shape of a cross section perpendicular to the thickness direction of the pole piece connecting portion 2. The shape can realize that two adjacent connectors 3 are independently arranged, so that the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is pulled by vibration is avoided.
Example III
Fig. 14 is a schematic structural view of a third embodiment of a pole piece of the present utility model.
The embodiment of the present utility model is different from the first embodiment in that the pole piece connecting portion 2 includes at least two sub-connectors 21 independently arranged along the first direction, and at least two connectors 3 are connected to the same connecting body 6.
Through the arrangement, the two adjacent connectors 3 can be independently arranged, so that the welding processes of the two adjacent connectors 3 are not mutually interfered, and the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is vibrated and pulled in the welding process of the next connector 3 can be avoided.
As shown in fig. 14, in the third embodiment of the present utility model, the adjacent two sub-connectors 21 have a spacing n along the first direction 1 And two adjacent connectors 3 connected to the same connector body 6 have a spacing n along the first direction 2 。
Through the arrangement, in the multi-section type welding process, the connectors 3 can be arranged at intervals, so that the welding processes of the connectors 3 are not interfered with each other, in the subsequent welding process, the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is pulled in a vibration mode can be avoided, and the welding head of the subsequent welding can be prevented from being pressed on the welding mark of the previous section so as to avoid repeated welding.
As shown in fig. 14, in the third embodiment of the present utility model, the pitch n from the connection head 3 to the tab body 1 1 Is a fixed value or gradually decreases, the spacing n 2 Is a fixed value or gradually decreases. Like this, can make two adjacent connector 3 interval setting to can make the welding process of two adjacent connector 3 not interfere each other, in the in-process of the welding of the connector 3 of later one, can avoid appearing the vibration and pull the welding of former section and lead to the problem that the welding of former section was torn.
It should be noted that, from the connector 3 to the connector body 6, when the distance n is 1 When the distance is fixed, the distance n between two adjacent connectors 3 connected to the same connecting body 6 2 The fixed value can be adopted, or the fixed value can be gradually reduced; similarly, from the connector 3 to the connector body 6, when the distance n is spaced 1 When gradually decreasing, the spacing distance n between two adjacent connectors 3 connected to the same connector body 6 2 May be a fixed value or may be gradually reduced.
Specifically, in the third embodiment of the present utility model, the two end surfaces of the adjacent two sub-connectors 21, which are close to each other, and the two end surfaces of the adjacent two connectors 3, which are connected to the same connection body 6, which are close to each other, are arc-shaped surfaces or flat surfaces. The structure is simple and convenient to process.
In the third embodiment of the present utility model, the adjacent two sub-connectors 21 are a first sub-connector and a second sub-connector, wherein the two end faces of the adjacent two sub-connectors 21 close to each other are a first end face a of the first sub-connector facing the second sub-connector, and a second end face b of the second sub-connector facing the first sub-connector.
In the third embodiment of the present utility model, the two adjacent connectors 3 are a first connector and a second connector, respectively, wherein two end faces of the two adjacent connectors 3 close to each other are a third end face c of the first connector facing the second connector, and a fourth end face d of the second connector facing the first connector.
Specifically, in the third embodiment of the present utility model, the interval between the adjacent two sub-connectors 21 and the interval between the adjacent two connection heads 3 connected to the same connection body 6 are rectangular or trapezoidal or V-shaped or U-shaped in shape in cross section perpendicular to the thickness direction of the pole piece connection portion 2. The shape can realize that two adjacent connectors 3 are independently arranged, so that the problem that the welding mark of the previous section is torn due to the fact that the welding mark of the previous section is pulled by vibration is avoided.
The embodiment of the utility model also provides a battery. The battery comprises the pole piece, and the pole piece is a positive pole piece 11 and/or a negative pole piece 12.
Specifically, in the embodiment of the present utility model, the battery is constituted by the positive electrode sheet 11, the negative electrode sheet 12, and the separator laminate.
The above battery has all the advantages of the above pole piece and will not be described here again.
As shown in fig. 1 to 18, in the embodiment of the present utility model, the battery further includes a positive tab 4 and a negative tab 5, the positive electrode tab 11 is welded to the positive tab 4 through a positive connector 31, the positive tab 4 includes at least two corresponding positive tab welding portions 41 independently arranged along the first direction, and each positive tab welding portion 41 of the positive tab 4 is welded to each positive connector 31 of the positive electrode tab 11 one-to-one; and/or, the negative electrode tab 12 is welded with the negative electrode tab 5 through the negative connector 32, the negative electrode tab 5 includes at least two corresponding negative electrode tab welding parts 51 independently arranged along the first direction, and each negative electrode tab welding part 51 of the negative electrode tab 5 is welded with each negative connector 32 of the negative electrode tab 12 one-to-one.
In the above technical solution, each positive tab welding portion 41 of the positive tab 4 is welded with each positive connector 31 of the positive tab 11 one to one, each negative tab welding portion 51 of the negative tab 5 is welded with the negative connector 32 of the negative tab 12 one to one, so that not only multi-stage welding can be implemented, but also each positive connector 31 of the positive tab 11 can be separated from each corresponding positive tab welding portion 41 of the positive tab 4 in sequence, and each negative connector 32 of the negative tab 12 can be separated from each corresponding negative tab welding portion 51 of the negative tab 5 in sequence, so that each welding section in the multi-stage welding process is not interfered with each other, and in the subsequent welding process, the problem that the welding of the previous section is torn due to the welding of the previous section caused by vibration pulling can be avoided, thereby improving the welding effect.
The embodiment of the utility model also provides an electric vehicle, which comprises the battery. The electric vehicle has all the advantages of the battery and is not described herein.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the pole piece connecting part is divided into at least two parts (namely at least two connectors) along the first direction by the end parts used for being welded with the pole lugs, and in the multi-section welding process, as the connectors are independently arranged, the connectors can be separated from the pole lugs in sequence, so that the welding process of the connectors is not interfered with each other, the influence of vibration caused by later welding on welding marks of the prior welding can be relieved, the problem that the welding marks of the prior welding are easy to tear is avoided, and the welding effect is improved.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. The pole piece is characterized by comprising a pole piece main body part (1) and a pole piece connecting part (2) connected with the pole piece main body part (1), wherein the pole piece connecting part (2) is provided with at least two connectors (3) which are independently arranged along a first direction, and the connectors (3) are configured to be capable of being welded and connected with pole lugs.
2. Pole piece according to claim 1, characterized in that the pole piece connection part (2) further comprises a connection body (6), the connection head (3) being connected to the pole piece body part (1) via the connection body (6), the connection body (6) and the connection head (3) connected thereto constituting a sub-connection piece (21).
3. Pole piece according to claim 2, characterized in that the pole piece connection (2) comprises one of the sub-connectors (21), the sub-connectors (21) comprising at least two of the connectors (3);
alternatively, the pole piece connecting part (2) comprises at least two sub-connecting pieces (21) which are independently arranged along a first direction, and each sub-connecting piece (21) comprises one connecting head (3);
or, the pole piece connecting part (2) comprises at least two sub-connecting pieces (21) which are independently arranged along the first direction, and at least two connecting heads (3) are connected with the same connecting body (6).
4. A pole piece according to claim 3, characterized in that adjacent two of said sub-connectors (21) have a spacing n in a first direction between them 1 And/or, a distance n is provided between two adjacent connectors (3) connected to the same connector body (6) along a first direction 2 。
5. Pole piece according to claim 4, characterized in that the spacing n from the connection head (3) to the pole piece body part (1) 1 Is a fixed value or gradually decreases, and/or the interval n 2 Is a fixed value or gradually decreases.
6. Pole piece according to claim 4, characterized in that the two end faces of adjacent two of the sub-connectors (21) that are close to each other are curved faces or planes and/or that the two end faces of adjacent two of the connectors (3) that are connected to the same connecting body (6) that are close to each other are curved faces or planes.
7. Pole piece according to claim 1, characterized in that the connection head (3) comprises a connection end (7) remote from the pole piece body part (1); the width of each connecting end (7) in the first direction is N, the width N of each connecting end (7) is the same, and the interval N between two adjacent connecting ends (7) in the first direction is as follows: n is more than 0mm and less than or equal to 0.1N.
8. Pole piece according to claim 1, characterized in that the connection head (3) comprises a connection end (7) remote from the pole piece body part (1); the width of the connecting end (7) in the first direction is N, and the width N of the connecting end (7) is larger than or equal to 5mm and smaller than or equal to 50mm.
9. A battery comprising a pole piece according to any one of claims 1 to 8, the pole piece being a positive pole piece (11) and/or a negative pole piece (12).
10. The battery according to claim 9, characterized in that the battery further comprises a positive tab (4) and a negative tab (5), the positive tab (11) being welded to the positive tab (4) by a positive connector (31), the positive tab (4) comprising at least two corresponding positive tab welds (41) arranged independently along a first direction, each positive tab weld (41) of the positive tab (4) being welded to each positive connector (31) of the positive tab (11);
and/or, negative tab (12) pass through negative connector (32) with negative tab (5) welding, negative tab (5) include corresponding along two at least negative tab welded part (51) of independent arrangement of first direction, each negative tab welded part (51) of negative tab (5) with each negative connector (32) of negative tab (12) one-to-one welding.
11. An electric vehicle comprising a battery according to claim 9 or 10.
CN202223416918.3U 2022-12-20 2022-12-20 Pole piece, battery and electric vehicle Active CN219959042U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223416918.3U CN219959042U (en) 2022-12-20 2022-12-20 Pole piece, battery and electric vehicle

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Application Number Priority Date Filing Date Title
CN202223416918.3U CN219959042U (en) 2022-12-20 2022-12-20 Pole piece, battery and electric vehicle

Publications (1)

Publication Number Publication Date
CN219959042U true CN219959042U (en) 2023-11-03

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