CN217114709U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
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- CN217114709U CN217114709U CN202220996529.3U CN202220996529U CN217114709U CN 217114709 U CN217114709 U CN 217114709U CN 202220996529 U CN202220996529 U CN 202220996529U CN 217114709 U CN217114709 U CN 217114709U
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Abstract
The utility model provides a battery, including utmost point ear, first electric core and second electric core, utmost point ear is connected with the first end of first connecting portion and the first end of second connecting portion respectively including spy out portion, first connecting portion and second connecting portion, spy out portion, and the second of first connecting portion is held and is connected with first electric core, and the second of second connecting portion is held and is connected with second electric core. Like this, under the unchangeable circumstances of battery total capacity, set the monomer large capacity battery into first electric core and second electric core, and first connecting portion and the second connecting portion through utmost point ear respectively with first electric core and second electric core welding, the radiating rate of utmost point ear has been improved, first connecting portion and second connecting portion set up in the portion of exploring out, in order to collect the electric current of first electric core and second electric core, the monomer large capacity battery and utmost point ear welded degree of difficulty have been reduced, first connecting portion and first electric core welded precision have been promoted, and second connecting portion and second electric core welded precision, thereby the yields of battery has been improved.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery.
Background
Multiple layers of tabs are typically provided on the cell to reduce the internal resistance of the battery. For example, by reducing the thickness of the pole pieces, a greater number of pole pieces are arranged in the battery core, and the pole lugs with the corresponding number of layers are arranged on the pole pieces, so that the internal resistance of the battery can be reduced to a certain extent, and the performance of the battery is improved. However, with the development of battery technology, people have made higher requirements on energy density, rate discharge and discharge temperature rise of batteries. Under the condition that the length and the width of the battery are limited, the high capacity of the soft package monomer is realized, the thickness of the battery is required to be increased, and the number of layers of corresponding lugs is increased.
However, when the number of layers of the tabs arranged on the battery core reaches a certain number, the problems of low welding precision, difficult assembly and the like of the tabs can occur, and the yield of the battery is low.
Therefore, the problem of low yield of the battery in the prior art is solved.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a battery to solve the problem that the battery yields is low among the prior art.
An embodiment of the utility model provides a battery, including utmost point ear, first electric core and second electric core, utmost point ear is including pop-out portion, first connecting portion and second connecting portion, pop-out portion respectively with the first end of first connecting portion with the first end of second connecting portion is connected, the second end of first connecting portion with first electric core is connected, the second end of second connecting portion with second electric core is connected.
Optionally, the first battery cell includes at least one first pole piece and at least one first sub-tab, and the first pole piece is connected to the second end of the first connection portion through the first sub-tab;
the second battery cell comprises at least one second pole piece and at least one second sub-pole lug, and the second pole piece is connected with the second end of the second connecting part through the second sub-pole lug;
wherein the polarity of the first pole piece is the same as that of the second pole piece.
Optionally, the relationship between the first pole piece and the first sub-tab is: one first sub-tab is arranged on a plurality of first pole pieces, or one first sub-tab is arranged on one first pole piece, or a plurality of first sub-tabs are arranged on one first pole piece;
and/or the relationship between the second pole piece and the second sub-pole lug is as follows: and one second sub-tab is arranged on one of the plurality of second pole pieces, or one second pole piece is provided with a plurality of second sub-tabs.
Optionally, the number of the first sub tabs ranges from 30 layers to 60 layers, and the number of the second sub tabs ranges from 30 layers to 60 layers.
Optionally, the protruding portion and the first connecting portion are of an integral structure;
or the extending part, the first connecting part and the second connecting part are of an integral structure.
Optionally, the first connection portion and the first battery cell are located on a first extension line, the second connection portion and the second battery cell are located on a second extension line, and the first extension line is parallel to the second extension line.
Optionally, the central axis of the first connection portion and the central axis of the first battery cell are located in a first extension line, and the central axis of the second connection portion and the central axis of the second battery cell are located in a second extension line.
Optionally, the battery further includes an insulating paste disposed at the protruding portion.
Optionally, a second end of the first connection portion is welded and fixed to the first battery cell, and a second end of the second connection portion is welded and fixed to the second battery cell.
Optionally, the battery further includes a third battery cell, the tab further includes a third connecting portion, a first end of the third connecting portion is connected to the extending portion, and a second end of the third connecting portion is connected to the third battery cell.
The embodiment of the utility model provides an in, under the unchangeable circumstances of battery total capacity, set the monomer large capacity battery into first electric core and second electric core, and first connecting portion and second connecting portion through utmost point ear respectively with first electric core and second electric core welding, the heat dissipation rate of utmost point ear has been improved, first connecting portion and second connecting portion set up in the portion of exploring out, in order to collect the electric current of first electric core and second electric core, the monomer large capacity battery and utmost point ear welded degree of difficulty have been reduced, first connecting portion and first electric core welded precision have been promoted, and second connecting portion and second electric core welded precision, thereby the yields of battery has been improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a battery according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of a battery according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be understood that the structures so used are interchangeable under appropriate circumstances such that embodiments of the invention can be practiced in sequences other than those illustrated or described herein, and the terms "first," "second," and the like are generally used herein in a generic sense without limitation to the number of terms, e.g., the first term can be one, or more than one.
The embodiment of the utility model provides a battery, as shown in fig. 1 to 4, including utmost point ear 10, first electric core 20 and second electric core 30, utmost point ear 10 is including stretching out portion 101, first connecting portion 102 and second connecting portion 103, and stretching out portion 101 is connected with the first end of first connecting portion 102 and the first end of second connecting portion 103 respectively, and the second end of first connecting portion 102 is connected with first electric core 20, and the second end of second connecting portion 103 is connected with second electric core 30.
In this embodiment, under the condition that the total capacity of the battery is not changed, the single high-capacity battery is set into the first battery cell 20 and the second battery cell 30, and the first connecting portion 102 and the second connecting portion 103 which pass through the tab 10 are respectively welded with the first battery cell 20 and the second battery cell 30, so that the heat dissipation rate of the tab 10 is improved, the first connecting portion 102 and the second connecting portion 103 are arranged at the probing portion 101, so as to collect the currents of the first battery cell 20 and the second battery cell 30, the difficulty of welding the single high-capacity battery and the tab is reduced, the welding precision of the first connecting portion 102 and the first battery cell 20 is improved, and the welding precision of the second connecting portion 103 and the second battery cell 30 is improved, so that the yield of the battery is improved.
Optionally, the first battery cell 20 includes at least one first pole piece and at least one first sub-pole tab 201, and the first pole piece is connected to the second end of the first connection portion 102 through the first sub-pole tab 201;
the second battery cell 30 includes at least one second pole piece and at least one second sub-tab 301, and the second pole piece is connected to the second end of the second connection portion 103 through the second sub-tab 301;
the polarity of the first pole piece is the same as that of the second pole piece.
In some alternative embodiments, the first cell 20 may employ a laminate design. For example, a plurality of first pole pieces may be stacked, and each first pole piece is provided with a first sub-tab 201, so as to reduce the internal resistance of the first battery cell 20, enhance the performance of the first battery cell 20, and facilitate realization of a high-rate charge and discharge process, where the number of first pole pieces of the first battery cell 20 and the number of first sub-tabs 201 may be 30 to 60;
the second cell 30 may employ a laminate design. For example, a plurality of second pole pieces may be stacked, and each second pole piece is provided with one second sub-pole tab 301, so as to reduce the internal resistance of the second battery cell 30, enhance the performance of the second battery cell 30, and facilitate the realization of the high-rate charge and discharge process, where the number of second pole pieces of the second battery cell 30 and the number of second sub-pole tabs 301 may be 30 to 60.
Or, according to an actual usage scenario, a plurality of first pole pieces may be provided with one first sub-tab 201, and a plurality of second pole pieces may be provided with one second sub-tab 301. For example, 2 or 3 first pole pieces are stacked to form a first pole piece group, and a first sub-tab 201 is arranged on the first pole piece group; 2 or 3 second pole pieces are stacked to form a second pole piece group, and a second sub-pole lug 301 is arranged on the second pole piece group. Therefore, the production process is simplified, the efficiency is improved, and the production cost is reduced. The number of the first sub-tab 201 and the second sub-tab 301 may be from 30 to 60.
It should be noted that a relationship between the first pole piece and the first sub-pole tab 201 in the first battery cell 20 may be different from a relationship between the second pole piece and the second sub-pole tab 301 in the second battery cell 30, for example, a plurality of first pole pieces may be stacked, and each first pole piece is provided with one first sub-pole tab 201, so as to reduce the internal resistance of the first battery cell 20 and enhance the performance of the first battery cell 20; and a second sub-tab 301 is arranged on the plurality of second tabs to simplify the process and improve the production efficiency. The same technical effect can be achieved.
In other alternative embodiments, the first cell 20 may be in a wound design. For example, the first pole piece is cut, so that a plurality of first sub tabs 201 are formed on one first pole piece, and the first pole piece is wound to enhance the energy density of the first battery cell 20 and improve the battery performance, wherein the number of the first sub tabs 201 may be 30 to 60;
the second cell 30 may be in a wound design. For example, the second pole piece is cut, so that a plurality of second sub-pole tabs 301 are formed on one second pole piece, and the second pole piece is wound to enhance the energy density of the second battery cell 30 and improve the battery performance, wherein the number of the second sub-pole tabs 301 may be 30 to 60.
It should be noted that a relationship between the first pole piece and the first sub-pole tab 201 in the first battery cell 20 may be different from a relationship between the second pole piece and the second sub-pole tab 301 in the second battery cell 30, for example, a plurality of first pole pieces may be stacked, and each first pole piece is provided with one first sub-pole tab 201, so as to reduce the internal resistance of the first battery cell 20 and enhance the performance of the first battery cell 20; and the second pole piece is cut, so that a plurality of second sub-tabs 301 are formed on one second pole piece, and the second pole piece is wound, so as to enhance the energy density of the second battery cell 30 and improve the battery performance. The same technical effect can be achieved.
Specifically, after the first battery cell 20 and the second battery cell 30 which adopt a lamination design or a winding design are connected in parallel through the tab 10, a soft package battery with a thickness of 15 mm to 30 mm is formed. The quantity of the pole lugs in a single battery cell is too small, so that the performance of the battery is easily influenced under the condition of overlarge internal resistance; the tab is too many, and the battery yield is lower under the condition of less welding and insufficient welding easily appear when welding the tab. The first connection portion 102 passing through the tab 10 may be welded to a plurality of first sub-tabs 201 provided in the first battery cell 20, for example, the number of the first sub-tabs 201 may range from 30 layers to 60 layers; moreover, the second connection portion 103 of the tab 10 is welded to a plurality of second sub-tabs 301 provided with the second battery cell 30, for example, the number of the second sub-tabs 301 may range from 30 layers to 60 layers, so that the performance of the battery may be improved, and the yield may be improved.
The tab 10 is configured in a three-head structure, that is, the tab 10 includes a protruding portion 101, a first connecting portion 102 and a second connecting portion 103, and a first end of the first connecting portion 102 and a first end of the second connecting portion 103 may be disposed at the same position of the protruding portion 101. After the first pole pieces are laminated or cut, a plurality of first sub-tabs 201 can be formed on the first pole pieces, and one ends of the plurality of first sub-tabs 201, which are far away from the plurality of first pole pieces, can be combined in a bundling, bonding or spot welding mode and then welded at the second end of the first connecting part 102; similarly, after the second pole piece is laminated or cut, a plurality of second sub-tabs 301 may be formed on the second pole piece, and one ends of the plurality of second sub-tabs 301, which are far away from the plurality of second pole pieces, may be combined by bundling, bonding, or spot welding, and then welded to the second end of the second connection portion 103. Therefore, the welding precision of the first sub-tab 201 and the first pole piece, the welding precision of the second sub-tab 301 and the second pole piece, the welding precision of the first sub-tab 201 and the first connecting portion 102, and the welding precision of the second sub-tab 301 and the second connecting portion 103 are improved. Thus, the number of welding layers of the tab of the battery provided by the embodiment can reach 60 to 120, the reliability of the tab 10 during welding is enhanced, and the yield of the battery is improved.
The polarities of the first pole pieces and the second pole pieces are the same, the first pole pieces and the second pole pieces can be positive pole pieces, and the tab 10 can be a positive tab; alternatively, the first and second pole pieces may be negative pole pieces, and the tab 10 may be a negative pole tab.
Alternatively, the protruding portion 101 and the first connecting portion 102 may be an integral structure;
alternatively, the protruding portion 101, the first connection portion 102, and the second connection portion 103 may be an integral structure.
In some alternative embodiments, the protruding portion 101 and the first connecting portion 102 may be a unitary structure formed by a stamping process, and the first connecting portion 102 is bent at a connection point of the protruding portion 101 and the first connecting portion 102, so that the first connecting portion 102 and the protruding portion 101 are disposed in a staggered manner. The first end of the second connecting portion 103 is welded at the joint of the first connecting portion 102 and the protruding portion 101. In this way, the second end of the first connection portion 102 faces the first battery cell 20, and the second end of the second connection portion 103 faces the second battery cell 30, so that the first battery cell 20 and the second battery cell 30 can be connected in parallel through the protrusion portion 101 to expand the battery capacity. Wherein, the cross-sectional area of the extending portion 101 is larger than that of the first connecting portion 102, so as to enhance the current-carrying capacity.
In other alternative embodiments, the tab 10 may be an integral structure, in other words, the protruding portion 101, the first connecting portion 102 and the second connecting portion 103 may be an integral structure formed by a stamping process, and the joint of the first connecting portion 102 and the protruding portion 101 is bent to make the first connecting portion 102 and the protruding portion 101 dislocated, and the joint of the second connecting portion 103 and the protruding portion 101 is bent to make the second connecting portion 103 and the protruding portion 101 dislocated, and the bending direction of the first connecting portion 102 and the protruding portion 101 may be opposite to the bending direction of the second connecting portion 103 and the protruding portion 101. In this way, the second end of the first connection portion 102 may also be directed toward the first battery cell 20, and the second end of the second connection portion 103 may be directed toward the second battery cell 30, and the first battery cell 20 and the second battery cell 30 may be connected in parallel through the protrusion portion 101, so as to expand the battery capacity. The cross-sectional area of the protruding portion 101 is larger than that of the first connecting portion 102, and the cross-sectional area of the protruding portion 101 is larger than that of the second connecting portion 103, so as to enhance the current-carrying capacity.
Specifically, the first connection portion 102 may be disposed on a first extension line, the second connection portion 103 may be disposed on a second extension line, the extending portion 101 may be disposed on a third extension line, the first extension line, the second extension line and the third extension line are parallel to each other, the first battery cell 20 may be located on the first extension line, and the second battery cell 30 may be located on the second extension line.
The connection portion 102 and the protruding portion 101 are bent at the connection portion, so that the first connection portion 102 and the protruding portion 101 are arranged in a staggered manner, that is, the first extension line and the third extension line are separated by a target distance. The first end of the second connection portion 103 is welded at the connection portion of the first connection portion 102 and the protruding portion 101, and is bent, and the second extension line and the third extension line are separated by a target distance, in other words, the third extension line may be disposed at a middle position between the first extension line and the second extension line, that is, the protruding portion 101 may be disposed at a middle position between the first connection portion 102 and the second connection portion 103, and the tab 10 may be disposed in a "Y" shape. The first battery cell 20 may be located in the first extension line to be disposed near the first connection portion 102, so as to reduce the length of the first sub-tab 201, and facilitate welding of the first connection portion 102 and the first battery cell 20; the second battery cell 30 can be located in the second extension line to be close to the second connection portion 103, so that the length of the second sub-tab 301 is reduced, the second connection portion 103 and the second battery cell 30 are convenient to weld, and the yield of the battery is improved.
The central axis of the first connection portion 102 and the central axis of the first battery cell 20 are located on a first extension line, and the central axis of the second connection portion 103 and the central axis of the second battery cell 30 are located on a second extension line.
In this way, the first connection portion 102 and the second connection portion 103 of the tab 10 are welded to the first battery cell 20 and the second battery cell 30, respectively, and the heat dissipation rate of the tab 10 is increased. A plurality of first sub-tabs 201 are arranged on the first battery cell 20, a plurality of second sub-tabs 301 are arranged on the second battery cell 30, and the first sub-tabs 201 and the second sub-tabs 301 can be soft tabs with certain flexibility. One end of each of the first sub-tabs 201 is connected to each of the first pole pieces in the first battery cell 20, and the other end of each of the first sub-tabs 201 is welded to the first connection portion 102 after being combined; similarly, a plurality of second sub-tabs 301 are welded on the second connection portion 103, and the central axis of the first connection portion 102 and the central axis of the first electrical core 20 are located in a first extension line, that is, the bent portions of the plurality of first sub-tabs 201 are located in the middle of the first electrical core 20, so that the condition that the first sub-tabs 201 are pulled due to expansion and contraction of the first pole piece in the circulation process can be alleviated, and the risk that the first sub-tabs 201 are broken in the circulation process is reduced; similarly, the central axis of the second connecting portion 103 and the central axis of the second electrical core 30 are located in the second extension line, that is, the bent portions of the second tabs 301 are located in the middle of the second electrical core 30, so that the situation that the second tabs 301 are pulled due to expansion and contraction of the second tabs in the circulation process can be alleviated, the risk of breakage of the second tabs 301 in the circulation process is reduced, and the yield of the battery is improved.
Alternatively, the second end of the first connection portion 102 and the first battery cell 20 may be welded and fixed, and the second end of the second connection portion 103 and the second battery cell 30 may be welded and fixed.
In this embodiment, one or two ultrasonic welding devices are adopted, first, the plurality of first sub tabs 201 are respectively fixed on the plurality of first tabs through an ultrasonic welding process, the plurality of second sub tabs 301 are respectively fixed on the plurality of second tabs through an ultrasonic welding process, then, the ends of the plurality of first sub tabs 201 far away from the first tabs are combined and then fixed on the first connecting portion 102 through an ultrasonic welding process, and the ends of the plurality of second sub tabs 301 far away from the second tabs are combined and then fixed on the second connecting portion 103 through an ultrasonic welding process. The first connection portion 102 and the protruding portion 101 may be an integral structure, and the second connection portion 103 may be fixed at a bending position of the first connection portion 102 and the protruding portion 101 through an ultrasonic welding process. The process of laser welding is reduced to reduce laser welding equipment, reduce the manufacturing cost of battery, and can improve welded precision, promote the yields of battery.
Optionally, the battery may further include an insulating paste 40, and the insulating paste 40 may be disposed at the protruding portion 101. The protruding part 101 of the tab 10 is provided with the insulating glue 40, so that the situation that the protruding part 101 of the tab 10 is in direct contact with other tabs to cause a battery short circuit is avoided.
Optionally, the battery may further include a third battery cell, and the tab 10 may further include a third connection portion, a first end of the third connection portion is connected to the protruding portion 101, and a second end of the third connection portion is connected to the third battery cell.
In this embodiment, the third electrical core may include a plurality of third sub-tabs and a plurality of third pole pieces, the first ends of the plurality of third sub-tabs are combined and then disposed at the second end of the third connection portion, the second ends of the plurality of third sub-tabs are respectively connected with the plurality of third pole pieces, and the polarities of the first pole piece, the second pole piece and the third pole piece are the same. Like this, through increasing the third electricity core, in order to enlarge battery capacity, and first electricity core 20, second electricity core 30 and third electricity core set up first connecting portion 102, second connecting portion 103 and the third connecting portion at utmost point ear 10 respectively, compare in single large capacity battery, promoted the welding precision between utmost point ear and the electricity core, can satisfy in the battery more quantity of pole pieces and utmost point ear be connected, in order to enlarge battery capacity, promote battery performance, welded precision has been improved simultaneously, the yields of battery has been improved.
The effect of the battery provided by the present invention is described below based on a plurality of sets of embodiments.
Example 1:
the battery can be the laminate polymer battery that 25 millimeters is thick, be provided with first electric core 20 and second electric core 30 in the battery, first electric core 20 and second electric core 30 all can adopt the mode of setting that both ends go out utmost point ear, first electric core 20 and the range upon range of setting of second electric core 30, first electric core 20 adopts the lamination design, inside sets up 50 first pole pieces of layer, and correspond and set up 50 first sub utmost point ears 201 of layer, second electric core 30 adopts the lamination design, inside sets up 50 second pole pieces of layer, and correspond and set up 50 sub utmost point ears 301 of layer second. The two stacked cores are fixed in parallel by adhesive tape paper, and the tabs 10 comprise three-protrusion structure aluminum tabs and three-protrusion structure copper nickel-plated tabs. Welding an aluminum foil soft tab (which may be a first sub-tab 201) of the first battery cell 20 and a welding end 1 (which may be a first connecting portion 102) of the three protrusion structure aluminum tab together by ultrasonic welding, and welding an aluminum foil soft tab (which may be a second sub-tab 301) of the second battery cell 30 and a welding end 2 (which may be a second connecting portion 103) of the three protrusion structure aluminum tab together by ultrasonic welding; then, the copper foil soft tab of the first battery cell 20 and the welding end 1 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding, and the copper foil soft tab of the second battery cell 30 and the welding end 2 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding; and then carrying out the normal processes of aluminum plastic film shell filling, packaging, baking, liquid injection, aging, formation, secondary sealing, sorting and the like to finish the manufacturing process of the soft package battery cell with the thickness of 25mm and 100 layers of lugs.
Example 2:
the battery can be a soft package battery with the thickness of 25mm, a first battery cell 20 and a second battery cell 30 are arranged in the battery, the first battery cell 20 and the second battery cell 30 can both adopt a setting mode that two ends of the first battery cell 20 and two ends of the second battery cell 30 are provided with lugs, the first battery cell 20 adopts a winding design, after the first pole piece is wound, 50 layers are formed, 50 layers of first sub-lugs 201 are correspondingly arranged, the second battery cell 30 adopts a winding design, after the second pole piece is wound, 50 layers are formed, and 50 layers of second sub-lugs 301 are correspondingly arranged. The two stacked cores are fixed in parallel by adhesive tape paper, and the tabs 10 comprise three-protrusion structure aluminum tabs and three-protrusion structure copper nickel-plated tabs. Welding an aluminum foil soft tab (which may be a first sub-tab 201) of the first battery cell 20 and a welding end 1 (which may be a first connecting portion 102) of the three protrusion structure aluminum tab together by ultrasonic welding, and welding an aluminum foil soft tab (which may be a second sub-tab 301) of the second battery cell 30 and a welding end 2 (which may be a second connecting portion 103) of the three protrusion structure aluminum tab together by ultrasonic welding; then, the copper foil soft tab of the first battery cell 20 and the welding end 1 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding, and the copper foil soft tab of the second battery cell 30 and the welding end 2 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding; and then carrying out the normal processes of aluminum plastic film shell filling, packaging, baking, liquid injection, aging, formation, secondary sealing, sorting and the like to finish the manufacturing process of the soft package battery cell with the thickness of 25mm and 100 layers of lugs.
Example 3:
the battery can be the laminate polymer battery of 25 millimeters thick, adopts the mode of setting up of same end play utmost point ear, is provided with first electric core 20 and second electric core 30 in the battery, and first electric core 20 and the range upon range of setting of second electric core 30, and first electric core 20 adopts the lamination design, and inside sets up 50 layers of first pole pieces to correspond and set up 50 layers of first sub utmost point ear 201, and second electric core 30 adopts the lamination design, and inside sets up 50 layers of second pole pieces, and corresponds and sets up 50 layers of second sub utmost point ear 301. The two stacked cores are fixed in parallel by adhesive tape paper, and the tabs 10 comprise three-protrusion structure aluminum tabs and three-protrusion structure copper nickel-plated tabs. Welding an aluminum foil soft tab (which may be a first sub-tab 201) of the first battery cell 20 and a welding end 1 (which may be a first connecting portion 102) of the three protrusion structure aluminum tab together by ultrasonic welding, and welding an aluminum foil soft tab (which may be a second sub-tab 301) of the second battery cell 30 and a welding end 2 (which may be a second connecting portion 103) of the three protrusion structure aluminum tab together by ultrasonic welding; then, the copper foil soft tab of the first battery cell 20 and the welding end 1 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding, and the copper foil soft tab of the second battery cell 30 and the welding end 2 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding; and then carrying out the normal processes of aluminum plastic film shell filling, packaging, baking, liquid injection, aging, formation, secondary sealing, sorting and the like to finish the manufacturing process of the soft package battery cell with the thickness of 25mm and 100 layers of lugs.
Example 4:
the battery can be a soft package battery with a thickness of 25mm, a setting mode of a tab is adopted at the same end, a first battery cell 20 and a second battery cell 30 are arranged in the battery, the first battery cell 20 and the second battery cell 30 are arranged in a stacked mode, the first battery cell 20 adopts a winding design, 50 layers are formed after a first pole piece is wound, 50 layers of first sub-tabs 201 are correspondingly arranged, the second battery cell 30 adopts a winding design, 50 layers are formed after a second pole piece is wound, and 50 layers of second sub-tabs 301 are correspondingly arranged. The two stacked cores are fixed in parallel by adhesive tape paper, and the tabs 10 comprise three-protrusion structure aluminum tabs and three-protrusion structure copper nickel-plated tabs. Welding an aluminum foil soft tab (which may be a first sub-tab 201) of the first battery cell 20 and a welding end 1 (which may be a first connecting portion 102) of the three protrusion structure aluminum tab together by ultrasonic welding, and welding an aluminum foil soft tab (which may be a second sub-tab 301) of the second battery cell 30 and a welding end 2 (which may be a second connecting portion 103) of the three protrusion structure aluminum tab together by ultrasonic welding; then, the copper foil soft tab of the first battery cell 20 and the welding end 1 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding, and the copper foil soft tab of the second battery cell 30 and the welding end 2 of the three-protrusion structure copper nickel-plated tab are welded together through ultrasonic welding; and then carrying out the normal processes of aluminum plastic film shell filling, packaging, baking, liquid injection, aging, formation, secondary sealing, sorting and the like to finish the manufacturing process of the soft package battery cell with the thickness of 25mm and 100 layers of lugs.
In the above embodiments 1 to 4, the tab 10 may be a positive tab, that is, an aluminum tab with a triple protrusion structure; alternatively, the tab 10 may be a negative tab, i.e., a three-pronged structure copper nickel plated tab.
A positive plate of a first battery cell 20 in the battery, namely a first plate, is arranged at a first connecting part 102 of the three-protrusion structure aluminum tab through a first sub-tab 201; the positive plate of the second cell 30, that is, the second pole piece, is disposed on the second connection portion 103 of the three-protrusion structure aluminum tab through the second sub-tab 301, and the protrusion portion 101 of the three-protrusion structure aluminum tab connects the positive plate of the first cell 20 and the positive plate of the second cell 30 in parallel to collect the positive currents of the first cell 20 and the second cell 30.
The negative plate of the first battery cell 20 in the battery can be arranged at the first connecting part 102 of the three-protrusion structure copper nickel-plated tab through a copper foil soft tab; the negative plate of the second electrical core 30 can be set on the second connecting portion 103 of the three-protrusion structure copper nickel-plated tab through the copper foil soft tab, and the protrusion portion 101 of the three-protrusion structure copper nickel-plated tab connects the negative plate of the first electrical core 20 and the negative plate of the second electrical core 30 in parallel to collect the currents of the negative electrodes of the first electrical core 20 and the second electrical core 30.
Like this, improved utmost point ear 10's rate of heat dissipation, reduced monomer large capacity battery and utmost point ear welded the degree of difficulty, promoted first connecting portion 102 and first electric core 20 welded precision to and second connecting portion 103 and second electric core 30 welded precision, thereby improved the yields of battery.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus of the embodiments of the present invention is not limited to performing functions in the order discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a battery, its characterized in that includes utmost point ear, first electric core and second electric core, utmost point ear is including exploring portion, first connecting portion and second connecting portion, exploring portion respectively with the first end of first connecting portion with the first end of second connecting portion is connected, the second of first connecting portion end with first electric core is connected, the second of second connecting portion end with the second electric core is connected.
2. The battery of claim 1, wherein the first cell comprises at least one first pole piece and at least one first sub-tab, and the first pole piece is connected to the second end of the first connection portion via the first sub-tab;
the second battery cell comprises at least one second pole piece and at least one second sub-pole lug, and the second pole piece is connected with the second end of the second connecting part through the second sub-pole lug;
wherein the polarity of the first pole piece is the same as that of the second pole piece.
3. The battery of claim 2, wherein the relationship between the first pole piece and the first sub-tab is: one first sub-tab is arranged on a plurality of first pole pieces, or one first sub-tab is arranged on one first pole piece, or a plurality of first sub-tabs are arranged on one first pole piece;
and/or the relationship between the second pole piece and the second sub-pole lug is as follows: and one second sub-tab is arranged on one of the plurality of second pole pieces, or one second pole piece is provided with a plurality of second sub-tabs.
4. The battery according to claim 2, wherein the first sub-tab has a number ranging from 30 to 60 layers, and the second sub-tab has a number ranging from 30 to 60 layers.
5. The battery of claim 1, wherein the protruding portion and the first connecting portion are of a unitary structure;
or, the extending part, the first connecting part and the second connecting part are of an integral structure.
6. The battery of claim 1, wherein the first connection portion and the first cell are located on a first extension line, wherein the second connection portion and the second cell are located on a second extension line, and wherein the first extension line and the second extension line are parallel.
7. The battery of claim 6, wherein the central axis of the first connection portion and the central axis of the first cell are located at a first extension line, and the central axis of the second connection portion and the central axis of the second cell are located at a second extension line.
8. The battery of claim 1, further comprising an insulating glue disposed at the protruding portion.
9. The battery of claim 1, wherein a second end of the first connection portion is welded to the first cell and a second end of the second connection portion is welded to the second cell.
10. The battery of claim 1, wherein the battery further comprises a third cell, wherein the tab further comprises a third connecting portion, wherein a first end of the third connecting portion is connected to the protruding portion, and a second end of the third connecting portion is connected to the third cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220996529.3U CN217114709U (en) | 2022-04-26 | 2022-04-26 | Battery with a battery cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220996529.3U CN217114709U (en) | 2022-04-26 | 2022-04-26 | Battery with a battery cell |
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| CN217114709U true CN217114709U (en) | 2022-08-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045738A1 (en) * | 2022-09-01 | 2024-03-07 | 珠海冠宇电池股份有限公司 | Battery and battery manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024045738A1 (en) * | 2022-09-01 | 2024-03-07 | 珠海冠宇电池股份有限公司 | Battery and battery manufacturing method |
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