CN207542313U - Electrode member, electrode assembly and rechargeable battery - Google Patents
Electrode member, electrode assembly and rechargeable battery Download PDFInfo
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- CN207542313U CN207542313U CN201721570992.7U CN201721570992U CN207542313U CN 207542313 U CN207542313 U CN 207542313U CN 201721570992 U CN201721570992 U CN 201721570992U CN 207542313 U CN207542313 U CN 207542313U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model is related to rechargeable battery technical field, more particularly to a kind of electrode member, electrode assembly and rechargeable battery.Electrode member provided by the utility model, including electrode body and conductive structure, electrode body includes insulating body and the conductive layer being set on insulating body surface, conductive layer has first part and the second part extended from first part, first part is coated with active material, the uncoated active material of second part；Conductive structure is connected on second part.The utility model causes electrode member winds or stack to be formed after electrode assembly can be conducted between adjacent electric guide portion by conductive structure, and is no longer limited by insulating body, therefore can effectively improve the conductive capability of electrode member.
Description
Technical field
The utility model is related to rechargeable battery technical field, more particularly to a kind of electrode member, electrode assembly and charging electricity
Pond.
Background technology
As a kind of rechargeable battery, lithium ion battery is due to energy density is high, power density is high, recycles number
The advantages that more and storage time is long, and be widely used on the portable electronic devices such as mobile phone and notebook and electronic vapour
On the electric vehicles such as vehicle and electric bicycle.
The electrode member generally use metal material of lithium ion battery, such as positive electrode component generally use aluminium foil, negative electricity
Pole component then generally use copper foil.However, in drift bolt experiment, since aluminium foil (copper foil) can generate hair in the puncture of nail
Thorn so that burr is directly overlapped on negative electrode component (positive electrode component), therefore can lead to positive electrode component and negative electrode structure
Part internal short-circuit causes on fire, the explosion of lithium ion battery.
Utility model content
In order to solve drift bolt experiment problem, have developed a kind of no longer using aluminium foil or the novel electrode component of copper foil.Such as
Shown in Fig. 1-2, this novel electrode component 1 ' includes insulating body 10 ' and the conductive layer being arranged on 10 ' surface of insulating body
11’.The second part of first part and uncoated active material 12 ' of the conductive layer 11 ' with coating active material 12 ', second
Part extends from first part.For the convenience of description, by first part and the part corresponding with first part of insulating body 10 '
It is known as being electrically generated portion 14 ', and the part corresponding with second part of second part and insulating body 10 ' is known as electric guide portion
13’.In use, electro-chemical reaction occurs for the active material 12 ' being electrically generated in portion 14 ' and electrolyte etc., charge and discharge process is generated；And
Electric guide portion 13 ' is then connect with afflux component, and the electric current of generation is drawn out to outside.Since conductive layer 11 ' is provided in insulation
On 10 ' surface of matrix, thickness is much smaller than copper foil, the aluminium foil used at present, therefore burr will not be generated in drift bolt use,
It can be tested with safety drift bolt.
However, multiple electric guide portions can be generated when this novel electrode component is by winding or stacking to form electrode assembly
13 ', multiple electricity guide portions 13 ' are connect with afflux component, but due to the presence of insulating body 10 ', between multiple electric guide portions 13 '
Conductive layer 11 ' can not be in direct contact, cause electric conductivity poor (even mutually insulated), cause in electric guide portion 13 '
Excessive with the resistance of afflux element joints, charge and discharge process medium temperature liter sharply increases.
Based on the above situation, a technical problem to be solved in the utility model is：Improve the electricity with insulating body
The conductive capability of pole component.
In order to solve the above-mentioned technical problem, the utility model provides a kind of electrode member, including electrode body and leads
Electric structure, electrode body include insulating body and the conductive layer being set on insulating body surface, and conductive layer has first part
With the second part extended from first part, first part is coated with active material, the uncoated active material of second part；It is conductive
Structure is connected on second part.
Optionally, conductive layer is set on the opposite sides surface of insulating body, and conductive structure includes the first conduct piece, the
One conduct piece is connected on the second part of one side surface of insulating body.
Optionally, conductive structure further includes the second conduct piece, and the second conduct piece is connected to positioned at insulating body opposite side table
On the second part in face.
Optionally, the first conduct piece and the second conduct piece are directly connected to；Alternatively, conductive structure further includes conductive connection part,
Conductive connection part is connected between the first conduct piece and the second conduct piece.
Optionally, one end of the separate first part of conductive structure extends to the separate first part beyond second part
One end.
Optionally, the width of second part is more than the width of conductive structure.
Optionally, conductive structure welds, and the first of formation is welded between second part and conductive structure with second part
Welding position is in one end of the close first part of second part.
Optionally, second part includes main part and transition part, and intermediate location is between main part and first part, transition
The width in portion is more than the width of main part.
Optionally, conductive structure includes main body connecting portion and transition connection portion, and transition connection portion is located at main body connecting portion
Close to one end of first part, the width of transition connection portion is more than the width in host conductive portion.
Optionally, main body connecting portion connect with main part and/or, transition connection portion is connect with transition part.
On the other hand the utility model additionally provides a kind of electrode assembly, the electrode member including the utility model.
Optionally, the part corresponding with second part of insulating body and second part form electric guide portion, electrode assembly
With multiple electric guide portions and multiple conductive structures, multiple electricity guide portions are stacked, and the electric guide portion that each two is adjacent
Between have conductive structure.
The another aspect of the utility model additionally provides a kind of rechargeable battery, and including afflux component, also, it further includes this
The electrode assembly of utility model, the electrode member of electrode assembly are electrically connected by conductive structure with afflux component.
The utility model is connected by adding conductive structure in the electrode member with insulating body, and by conductive structure
In on the second part of uncoated active material so that electrode member is wound or stacking forms adjacent electric guide portion after electrode assembly
Between can be conducted by conductive structure, and no longer limited by insulating body, therefore electrode structure can be effectively improved
The conductive capability of part.
By the way that the exemplary embodiment of the utility model is described in detail referring to the drawings, the utility model its
Its feature and its advantage will become apparent.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 shows a kind of structure diagram of electrode member comprising insulating body of research and development.
Fig. 2 shows the side views of Fig. 1.
Fig. 3 shows the structure diagram of the utility model first embodiment electrode member.
Fig. 4 shows the side view of Fig. 3.
Fig. 5 shows the local expansion schematic diagram of the electrode assembly based on electrode member shown in Fig. 3.
Fig. 6 shows the dimensional structure diagram of the battery based on electrode assembly shown in Fig. 5.
Fig. 7 shows the structure diagram of the utility model second embodiment electrode member and the electrode assembly based on it.
Fig. 8 shows the structure diagram of the utility model 3rd embodiment electrode member and the electrode assembly based on it.
Fig. 9 shows the structure diagram of the utility model fourth embodiment electrode member and the electrode assembly based on it.
Figure 10 shows the dimensional structure diagram of the battery based on electrode assembly shown in Fig. 9.
Figure 11 shows the side view of the 5th embodiment electrode member of the utility model.
In figure：
1 ', electrode member；10 ', insulating body；11 ', conductive layer；12 ', active material；13 ', electric guide portion；14 ', it is electric
Generating unit；
1st, electrode body；10th, insulating body；11st, conductive layer；12nd, active material；13rd, electric guide portion；14th, it is electrically generated portion；
2nd, conductive structure；21a, the first conduct piece；21b, the second conduct piece；22nd, conductive connection part；
1a, the first weld part；1b, the second weld part；1c, rivet；1d, third weld part；13a, main part；13b, transition
Portion；2a, main body connecting portion；2b, transition connection portion；G, gap；
100th, electrode assembly；101st, negative electrode component；102nd, separator；103rd, positive electrode component；200th, afflux component；
300th, head cover；400th, electrode terminal.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.Based on the embodiment in the utility model, those of ordinary skill in the art are not having
Have carry out creative work under the premise of all other embodiments obtained, shall fall within the protection scope of the present invention.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
In the description of the present invention, it is to be appreciated that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally,
Vertically, vertically, it is horizontal " and " pushing up, bottom " etc. indicated by orientation or position relationship be normally based on orientation or position shown in the drawings
Relationship is put, be for only for ease of description the utility model and simplifies description, in the case where not making to illustrate on the contrary, these nouns of locality
It does not indicate that and implies signified device or element must have specific orientation or with specific azimuth configuration and operation, because
This is it is not intended that limitation to scope of protection of the utility model；The noun of locality " inside and outside " refers to the wheel relative to each component in itself
Wide is inside and outside.
In the description of the present invention, it is to be appreciated that limiting zero using the words such as " first ", " second "
Part, it is only for convenient for being distinguished to corresponding parts, such as without Stated otherwise, above-mentioned word there is no particular meaning,
Therefore it is not intended that limitation to scope of protection of the utility model.
In order to make it easy to understand, the basic structure of rechargeable battery is illustrated with reference to Fig. 5 and Fig. 6 first.With reference to Fig. 6, fill
Battery mainly includes housing (not shown), electrode assembly 100, afflux component 200, head cover 300 and electrode terminal 400.
Housing has the cavity of top end opening, for housing electrode assembly 100 etc., to be protected to 100 grade formation of electrode assembly.Electrode group
Part 100 is placed in housing, and the core component of charging/discharging function is realized for rechargeable battery.Head cover 300 is covered on the opening of housing
On.Electrode terminal 400 is set on head cover 300 and is exposed to except head cover 300.Afflux component 200 is connected to electrode assembly 100
Between electrode terminal 400, to realize being electrically connected between electrode assembly 100 and electrode terminal 400.
Wherein, with reference to Fig. 5, electrode assembly 100 is by positive electrode component 103, negative electrode component 101 and is set to positive electrode
Separator 102 between component 103 and negative electrode component 101 winds or stacks.Positive electrode component 103 and negative electrode component
101 are typically set to laminated structure, so, the two is usually otherwise known as electrode film and negative electrode plate.Positive electrode component 103
Include being electrically generated portion 14 and electric guide portion 13 with negative electrode component 101, be electrically generated 14 active substance 12 of portion, and electricity guides
Portion 13 does not have active material 12.After winding or stacking form electrode assembly, the multiple electric guide portions 13 of electrode assembly are layered in one
It rises, is respectively formed anode ear and negative electrode lug.Electrode assembly is connect by anode ear or negative electrode lug with afflux component 200.Wherein, just
Corresponding electrode member 103 is anode ear.Corresponding negative electrode component 101 is negative electrode lug.Pass through afflux component 200 and anode ear
The electrode terminal 400 of connection is known as positive terminal.It is known as by the motor terminal 400 that afflux component 200 is connect with negative electrode lug negative
Extreme son.
It is wound when based on the existing electrode member shown in Fig. 1-2 as positive electrode component 103 and/or negative electrode component 101
Or stack when forming electrode assembly 100, it is insulated between the adjacent electric guide portion 13 of any two of the lug of electrode assembly 100
Matrix 10 ' separates, cause between adjacent two electric guide portions 13 it is more difficult, can not even transmit electric current, electric current almost can only be by
The conductive layer 11 ' being directly connected to afflux component 200 of the outermost electric guide portion 13 of lug transmits outward, therefore, conductive energy
Power is poor, and efficiency for charge-discharge is relatively low, and be easy to cause hot-spot, shortens the service life of each component.
In order to solve the above-mentioned technical problem, the utility model passes through to the electrode structure with insulating body shown in Fig. 1-2
Part is improved, and provides a kind of novel electrode member.
Fig. 3-Figure 11 shows five embodiments of the utility model electrode member.With reference to Fig. 3-11, the utility model institute
The electrode member of offer, including electrode body 1 and conductive structure 2, electrode body 1 includes insulating body 10 and is set to insulation base
Conductive layer 11 on 10 surface of body, conductive layer 11 have first part and the second part extended from first part, first part
Coated with active material 12, the uncoated active material 12 of second part；Conductive structure 2 is connected on second part.
For the convenience of description, in the utility model will first part and insulating body 10 portion corresponding with first part
Divide and be known as being electrically generated portion 14, and the part corresponding with second part of second part and insulating body 10 is known as electric guide portion
13.In other words, in the utility model, electrode body 1 includes being electrically generated portion 14 and electric guide portion 13, is electrically generated portion 14 and electricity
Guide portion 13 includes insulating body 10 and the conductive layer 11 being set on 10 surface of insulating body, the difference is that, it is electrically generated portion
It is coated with active material 12 on 14 conductive layer 11, and uncoated active material 12 on the conductive layer 11 of electric guide portion 13.Electricity is raw
It is used to realize charge and discharge process by active material 12 and the electro-chemical reaction of electrolyte into portion 14.Electric guide portion 13 is then used for filling
The afflux component 200 of battery connects, portion 14 will be electrically generated caused by electric current lead to outside.
The utility model in the electrode member with insulating body 10 by adding conductive structure 2, and by conductive structure 2
It is connected on the second part being arranged on 10 surface of insulating body so that electrode member, which winds or stacks, forms electrode assembly
It can be realized and conducted by conductive structure 2 between adjacent electricity guide portion 13 after 100, and no longer be limited by insulating body 10,
Therefore the conductive capability of electrode member can effectively be promoted.
In the utility model, conductive layer 11 can be set on a side surface of insulating body 10, can also be set to
On the opposite sides surface of insulating body 10.It is conductive when conductive layer 11 is set on the opposite sides surface of insulating body 10
Structure 2 can include the first conduct piece 21a, and first conduct piece 21a is connected to second positioned at 10 1 side surface of insulating body
On part；Alternatively, further, conductive structure 2 can also include the second conduct piece 21b, second conduct piece 21b connections simultaneously
In on the second part positioned at 10 another side surface of insulating body.The structure and material of first conduct piece 21a and the second conduct piece 21b
Material can be identical or different.
When conductive structure 2 includes the first conduct piece 21a and the second conduct piece 21b, the first conduct piece 21a and second is conductive
Part 21b can be directly connected to；Alternatively, conductive structure 2 can also further comprise conductive connection part 22, conductive connection part 22 connects
Between the first conduct piece 21a and the second conduct piece 21b so that the first conduct piece 21a and the second conduct piece 21b is connected by conduction
Socket part 22 connects.
The utility model is described further with reference to five embodiments shown in Fig. 3-11.In this five realities
It applies in example, is illustrated so that electrode member winds and to form electrode assembly 100 as an example.
It is illustrated first with reference to the first embodiment of Fig. 3-5 pairs of the utility model.Wherein, Fig. 3 and Fig. 4 show this reality
With the electrode member of novel first embodiment.Fig. 5 and Fig. 6 respectively illustrates the electrode group based on the first embodiment electrode member
Part and rechargeable battery.
As shown in Figure 3 and Figure 4, in this first embodiment, electrode member includes electrode body 1 and conductive structure 2, electrode
Ontology 1 includes insulating body 10 and conductive layer 11.Wherein, insulating body 10 may be used PP, PE, PET or PI etc. and be resistant to be electrolysed
The macromolecule polymer material of corrosion.The metal bases such as aluminium or copper may be used in conductive layer 11.Preferably, electrode member is used as
Conductive layer 11 uses aluminium base during positive electrode component, and electrode member is used as conductive layer 11 during negative electrode component and uses Copper base material.It leads
Electric structure 2 then may be used the metal materials such as copper or aluminium and be made.Preferably, electrode member is used as conductive structure during positive electrode component
2 use aluminum material, and electrode member is used as conductive structure 2 during negative electrode component and uses copper product.
By Fig. 3 and Fig. 4 it is found that in this embodiment, conductive layer 11 is set on the opposite sides surface of insulating body 10,
That is, being equipped with conductive layer 11 on the opposite sides surface of insulating body 10, insulating body 10 is located between two conductive layers 11.It leads
Electric layer 11 have coating active material 12 first part's (in figure 3 be low portion) and uncoated active material 12 the
Two parts (being upper part in figure 3), second part extends (being to upwardly extend in figure 3) from first part.It is conductive
Layer 11 can be machined on 10 surface of insulating body by modes such as plating, electrophoresis, spraying or dip-coatings.
For convenience, T directions shown in Fig. 3 are known as thickness direction, thickness direction T is set for insulating body 10
Direction where the opposite sides surface of conductive layer 11, that is, two conductive layers 11 of the embodiment are set to insulating body 10
On two apparent surfaces of thickness direction；And H directions shown in Fig. 3 are known as short transverse, which is first part
The direction of the opposite extension in the direction being oppositely arranged with second part, as first part and second part；It simultaneously will be shown in Fig. 4
W directions are known as width direction, and width direction W is the direction vertical with thickness direction T and short transverse H.
As shown in figure 3, in this embodiment, conductive structure 2 is connected on second part, in other words, conductive structure 2 connects
It is connected on the conductive layer 11 of electric guide portion 13.Based on this, electrode member can no longer by conductive layer 11 directly with afflux component
200 connections, but can be connect by conductive structure 2 with afflux component 200, it realizes electric current export, is effectively improved electrode member
Electric conductivity, improve electrode member cross electric energy power.Arrow in Fig. 3 shows electric current export process.Such as Fig. 3 arrows institute
Show, electric current is flowed to the second part of conductive layer 11 by active material 12 by the first part of conductive layer 11, then by conductive layer 11
The conductive structure 2 that is connect with the second part of second part flow direction, so that electric current can be led to and be led with this by conductive structure 2
The afflux component 200 for the rechargeable battery that electric structure 2 connects, and further drawn by afflux component 200, such as lead to charging electricity
The electrode terminal 400 in pond.
Welding or bonding way connection may be used between conductive structure 2 and second part, for example, conductive structure 2 can be with
It is connected on second part using ultrasonic bonding or conductive adhesive mode.As shown in Figure 4, in this embodiment, conductive knot
Structure 2 is welded on second part, forms the first weld part 1a therebetween.If the root of electric guide portion 13a is excessively soft, electricity guiding
Portion 13a easily bends and is inserted into inside electrode assembly 100, causes short circuit.In order to further solve the problems, such as this, as shown in figure 4, should
First weld part 1a of embodiment is set to one end of the close first part of second part, that is, the first weld part 1a is located at the
The root of two parts, that is, conductive structure 2 is welded in the root of electric guide portion 13.Since the first weld part 1a has centainly
Therefore intensity, makes its root close to second part, can increase the intensity of electric 13 root of guide portion, so as to prevent electricity
Guide portion 13, which bends to be inserted into inside electrode assembly 100 due to root is excessively soft, causes short circuit, effectively improves safety in utilization.
Also, as shown in figure 3, the conductive structure 2 of the embodiment includes the first conduct piece 21a and the second conduct piece 21b, the
One conduct piece 21a and the second conduct piece 21b is respectively arranged at the both sides of the thickness direction of electric guide portion 13, and is guided respectively with electricity
Conductive layer 11 in the both side surface of the insulating body 10 in portion 13 connects, that is, the first conduct piece 21a is with being located at insulating body 10
Second part connection on one side surface, the second conduct piece 21b and second on another side surface of insulating body 10
Divide connection.
Since the both sides of the thickness direction of electric guide portion 13 are respectively equipped with the first conduct piece 21a and the second conduct piece 21b, because
This, as shown in figure 5, the electrode assembly 100 including the electrode member, arbitrary the two of lug (can be anode ear or negative electrode lug)
It is respectively provided with electric guide structure 2 between a adjacent electric guide portion 13, and the adjacent electric guide portion 13 of any two can pass through one
The first conduct piece 21a in a electricity guide portion 13 is electrically connected with the second conduct piece 21b realizations in another electric guide portion 13, makes
Electric current smoothly and can be transmitted fully, and most electric at last between each electric guide portion 13 stacked together of lug
Electric current is more substantially efficiently transferred on afflux component 200 caused by pole component 100.Due to the adjacent electric guide portion of lug
No longer electric current can be blocked to transmit by insulating body 10 between 13, therefore, it is possible to effectively improve the efficiency for charge-discharge of rechargeable battery,
And the risk that rechargeable battery overheats in charge and discharge process can be reduced, be conducive to extend the service life of rechargeable battery.
The the first conduct piece 21a and the second conduct piece 21b of the embodiment are respectively arranged at electric 13 thickness direction of guide portion
Opposite sides so that as shown in figure 3, having clearance G between the first conduct piece 21a and the second conduct piece 21b.It also, can by Fig. 3
Know, in this embodiment, the upper end of the first conduct piece 21a and the second conduct piece 21b are above the upper end of electric guide portion 13, that is,
Along short transverse H, the edge of the separate first part of conductive structure 2 extends to the side of the separate first part beyond second part
Edge, between this so that electrode body 1 (being specially electric guide portion 13) is filled only between the first conduct piece 21a and the second conduct piece 21b
The part of gap G.
Since electrode body 1 is filled only with the part of clearance G between the first conduct piece 21a and the second conduct piece 21b,
Between at least part along short transverse H of first electrode component 21a and second electrode component 21b not by the institute of insulating body 10 every
From, on the one hand, this is conducive to make the conductive layer 11 in the both side surface of 10 thickness direction of insulating body to pass through first electrode component
21a and second electrode component 21b realizations conduct, and further facilitate electric current export, promote electric conductivity；On the other hand, even
During the afflux component 200 of the electrode assembly 100 that receiving electrode component is formed and rechargeable battery, it can with more convenient pass through pressure
Tight first conduct piece 21a and the second conduct piece 21b reduces clearance G, makes the first conduct piece 21a and the second conduct piece 21b more
Closely it is bonded, the electric current of each electric guide portion 13 stacked together is transferred to afflux component 200 by this lug of being not only more convenient for,
Conductive capability is further improved, while is also beneficial to reduce the occupied assembly space of lug, increases the space of electrode assembly 100
Utilization rate, and facilitate the assembling of electrode assembly 100 and afflux component 200.
Moreover, as shown in figure 3, the conductive structure 2 of the embodiment further includes conductive connection part 22, which connects
It is connected between the first conduct piece 21a and the second conduct piece 21b.Specifically, in figure 3, the first conduct piece 21a and the second conduct piece
The lower end of 21b is connect respectively with the second part on 10 thickness direction opposite sides surface of insulating body, and first is conductive
The upper end of part 21a and the second conduct piece 21b are then connected by conductive connection part 22 so that conductive structure 2 connects substantially in inverted U
It is connected in electric guide portion 13.
By setting conductive connection part 22, the first conduct piece 21a and the second conduct piece 21b can be connected as one,
Due to accordingly even when the first conduct piece 21a and the second conduct piece 21b is not compressed, the first conduct piece 21a and the second conduct piece 21b
Between can also transmit electric current, therefore, be more convenient for making being formed adjacent electric guide portion 13 stacked together after electrode assembly 100 it
Between do not influenced by insulating body 10 and conducted each other, be conducive to further improve the electric conductivity of lug.
It should be noted that in addition to conductive connection part 22 can be set by the first conduct piece 21a and the second conduct piece 21b
It is connected as one, the two can also be connected to become one by being directly connected to the first conduct piece 21a and the second conduct piece 21b
Body, that is, one end (in figure 3 be upper end) of the separate first part of the first conduct piece 21a and the second conduct piece 21b's is separate
One end (being upper end in figure 3) of first part can also be directly connected to, for example, a copper foil or aluminium foil conduct may be used
Conductive structure 2, and on the conductive layer 11 of opposite sides for being connected to electric guide portion 13 after copper foil or aluminium foil are bent from middle part, this
In the case of kind, two parts of copper foil or the opposite bending of aluminium foil are respectively the first conduct piece 21a and the second conduct piece 21b, at this time
First conduct piece 21a and the second conduct piece 21b are directly connected to and connect into inverted V-shape so that conductive structure 2 is substantially in reverse V-shaped
Ground is connected in electric guide portion 13.
In addition, as shown in figure 4, in this embodiment, W, the size of second part are more than conductive structure 2 in the width direction
Size, that is, the width of second part is more than the width of conductive structure 2.This so that the cross-sectional area of electric guide portion 13 is larger, resistance
Smaller, conveyance capacity is stronger.
The electrode member of the embodiment is used as positive electrode component 103, and by the electrode member and separator 102 and negative electricity
Pole component 101 is wound together, can form electrode assembly 100 as shown in Figure 5.As shown in Figure 5, which has
There are multiple electric guide portions 13 and multiple conductive structures 2, multiple electricity guide portions 13 are stacked, and the electricity guiding that each two is adjacent
There is conductive structure 2 between portion 13.Multiple electric guide portions 13 stacked together form the lug of electrode assembly 100, due to pole
There is conductive structure 2 between the adjacent electric guide portion 13 of each two of ear, it therefore, can be no longer between adjacent electric guide portion 13
It is limited by insulating body 10, and is conducted by conductive structure 2, so that 14 current generated export of portion will be electrically generated
When, not only the outermost electricity guide portion 13 being directly connected to afflux component 200 of lug can by the conductive structure 2 of itself to
Outer transmission electric current, and each electric guide portion 13 being laminated between outermost electricity guide portion 13 of lug can also be tied by conduction
The realization of structure 2 conducts and transmits electric current outward, and then can effectively promote conductive capability, realizes more efficient charge and discharge
Journey.
Electrode assembly 100 shown in fig. 5, the electrode member of the use of positive electrode component 103 embodiment, and negative electrode structure
Part 101 does not use the electrode member of the embodiment.It is to be understood that alternatively, can also negative electrode component 101 use
The electrode member of the embodiment and positive electrode component 103 does not use or can be with positive electrode component 103 and negative electrode component
101 use the electrode member of the embodiment.In fact, the electrode member of the utility model both may be used as positive electrode component
103, it is also used as negative electrode component 101, that is, the positive electrode component 103 and/or negative electrode component 101 of electrode assembly 100 can
With using the electrode member of the utility model.
By electrode assembly 100 shown in fig. 5 and afflux component 200, housing, head cover 300 and the electrode terminal of rechargeable battery
400 grades assemble, and can form rechargeable battery shown in fig. 6.Can be welded between electrode assembly 100 and afflux component 200 (such as
Ultrasonic bonding or electric resistance welding) or be threadedly coupled, realize being electrically connected between electrode assembly 100 and afflux component 200.Such as Fig. 6
Shown, in this embodiment, electrode assembly 100 is welded with afflux component 200.Specifically, it will be appreciated from fig. 6 that electrode assembly 100 is logical
It crosses conductive structure 2 to weld with afflux component 200, the second weld part 1b is formed between conductive structure 2 and afflux component 200.
Other four embodiments are illustrated below.To simplify the description, other four implementations are only mainly introduced below
The difference of example and first embodiment, non-description section are referred to first embodiment and are understood.
Fig. 7 shows the second embodiment of the utility model electrode member.As shown in fig. 7, it in this second embodiment, leads
Electric structure 2 still includes the first conduct piece 21a and the second conduct piece 21b, and the upper end of conductive structure 2 is (far from second part
One end) it still extends to beyond the upper end of second part (one end far from second part), but different from aforementioned first embodiment
, the conductive structure 2 of the second embodiment is no longer including being connected between the first conduct piece 21a and the second conduct piece 21b
Conductive connection part 22, that is, in this second embodiment, the upper end of the upper end of the first conduct piece 21a and the second conduct piece 21b are no longer
It is connected by conductive connection part 22, but independently of one another, as free end.Due to omitting conductive connection part 22, it is conductively connected
Portion 22 is no longer supported the first conduct piece 21a and the second conduct piece 21b, therefore, the first conduct piece 21a and the second conduct piece
21b can draw closer together under external force, convenient in connection electrode component 100 and during afflux component 200, by each conductive structure
2 the first conduct piece 21a and the second conduct piece 21b is more closely pressed, so as to more effectively eliminate the first conduct piece 21a
And the second clearance G between conduct piece 21b, electrical efficiency is further improved, and save assembly space, realize electrode assembly 100
It is more effectively assembled with afflux component 200.
Fig. 8 shows the 3rd embodiment of the utility model electrode member.As shown in figure 8, in the 3rd embodiment, lead
Electric structure 2 still includes the first conduct piece 21a, the second conduct piece 21b and is connected to the first conduct piece 21a and the second conduct piece
Conductive connection part 22 between 21b, but unlike aforementioned first embodiment, in this second embodiment, along short transverse
H, electrode body 1 (being specially electric guide portion 13) are no longer filled only with clearance G between the first conduct piece 21a and the second conduct piece 21b
Part, but fill clearance G whole.The advantages of this arrangement are as follows electrode body 1 can be in short transverse H to
The whole of one conduct piece 21a and the second conduct piece 21b are supported, and it is conductive to more efficiently prevent from the first conduct piece 21a and second
Part 21b is bent, and this aspect can increase the intensity of electrode member, on the other hand, due to that can prevent using process
In the first conduct piece 21a and the second conduct piece 21b bending be inserted into electrode assembly 100 in and cause short circuit, and hence it is also possible into one
Step improves safety in utilization.
The electrode assembly 100 that electrode member based on 3rd embodiment shown in Fig. 8 is formed, in the afflux with rechargeable battery
When component 200 connects, threaded connection or riveting method may be used.For example, it as shown in figure 9, can be filled using rivet 1c connections
Electric structure 2 and afflux component 200.Since the threaded connectors such as rivet 1c are easier to penetrate conductive structure 2 and be filled in first to lead
Insulating body 10 and conductive layer 11 between electric part 21a and the second conduct piece 21b, therefore, connect simpler convenience.Moreover,
Since the threaded connectors such as rivet 1c are passed through from electric guide portion 13, the conductive layer in electric 13 both side surface of guide portion can be connected
11 (second parts i.e. in 10 both side surface of insulating body), accordingly it is also possible to further improve the 3rd embodiment electrode structure
The conductive capability of part.
Figure 10 shows the fourth embodiment of the utility model electrode member.As shown in Figure 10, in the fourth embodiment,
The upper end of conductive structure 2 is still extended to beyond the upper end of second part, but unlike aforementioned first embodiment, and the 4th
The conductive structure 2 of embodiment saves no longer simultaneously including the first conduct piece 21a, the second conduct piece 21b and conductive connection part 22
Slightly the second conduct piece 21b and conductive connection part 22, only include the first conduct piece 21a, that is, the fourth embodiment is no longer insulating
Conduct piece is set respectively on the second part on the opposite sides surface of 10 thickness direction of matrix, and only in 10 thickness side of insulating body
To a side surface second part on conduct piece is set.Also, as shown in Figure 10, the electrode member winding based on the embodiment
When forming electrode assembly 100, the first conduct piece 21a of the electrode member of used multiple embodiments may be contained within respectively alienating oneself
On the second part of the same side surface of 10 thickness direction of edge matrix.In this way, as shown in Figure 10, each electricity guiding stacked together
Still there is conductive structure 2 (being specially the first conduct piece 21a), and one in portion 13, between the adjacent electric guide portion 13 of each two
(the electric guide portion 13 in left side is located at a left side to the conductive layer 11 for being not provided with the first conduct piece 21a sides of a electricity guide portion 13 in such as Fig. 9
The conductive layer 11 of side) it can (right side electricity draws in such as Fig. 9 with the first conduct piece 21a of the electric guide portion 13 of another adjacent with its
Lead the first conduct piece 21a positioned at left side in portion 13) it contacts, between the electric guide portions 13 of arbitrary neighborhood two that can realize lug
Conduct, it is effectively conductive.It, therefore, can be with moreover, because the embodiment omits the second conduct piece 21b and conductive connection part 22
While enough overcurrents are provided, the size of conductive structure 2 in the thickness directiont is effectively reduced, this not only can further subtract
Few lug assembles occupied space, increases the space availability ratio of electrode assembly 100, can also reduce electrode assembly 100 with filling
The assembly difficulty of battery other structures component.
Figure 11 shows the 5th embodiment of the utility model electrode member.As shown in figure 11, in the 5th embodiment,
The second part of the uncoated active material 12 of conductive layer 11 includes main part 13a and transition part 13b, and transition part 13b is located at master
Between body portion 13a and first part, and the width of transition part 13b is more than the width of main part 13a.By main part 13a's
On the basis of increase the transition part 13b that width is more than main part 13a, the area of electric guide portion 13a can be increased, reduce resistance, increased
Big conveyance capacity.Wherein, transition part 13b can be identical with the material of main part 13a.Also, as shown in Figure 11, the embodiment
Transition part 13b, width are also less than the width of first part, can more efficiently prevent from transition part 13b and electrode assembly in this way
Short circuit occurs for the electrode member of 100 opposite polarity, for example, when the electrode member of the embodiment is used as positive electrode component 103, makes
The width of transition part 13b is less than the width of first part, can prevent transition part 13b and 101 short circuit of negative electrode component, then example
Such as, when the electrode member of the embodiment is used as negative electrode component 101, the width of transition part 13b is made to be less than the width of first part,
Transition part 13b and 103 short circuit of positive electrode component can be prevented, so as to improve security performance.
Moreover, as shown in figure 11, in the 5th embodiment, conductive structure 2 is connected including main body connecting portion 2a with transition
Portion 2b, transition connection portion 2b are located at one end of the close first part of main body connecting portion 2a, and the width of transition connection portion 2b is more than
The width of host conductive portion 2a.Wherein, it can be appreciated that when conductive structure 2 includes the first conduction as shown in first four embodiment
During part 21a and/or the second conduct piece 21b, main body connecting portion 2a and transition connection portion 2b be respectively the first conduct piece 21a and/or
The upper part and low portion of second conduct piece 21b.Also, as shown in Figure 11, in the 5th embodiment, main body connecting portion
2a is connect with main part 13a；Transition connection portion 2b is connect with transition part 13b.By the way that transition connection portion 2b is connected to transition part
13b so that the transition with larger width that conductive structure 2 passes through transition connection portion 2b and second part with larger width
13b connections in portion can increase conductive structure 2 and the contact area of electric guide portion 13, the mistake of increase conductive structure 2 and second part
Flow area further improves electric conductivity.Also, as shown in figure 11, in the 5th embodiment, transition connection portion 2b's is following
Edge is located above the lower edge of transition part 13b, and the edge of the width direction of transition connection portion 2b is without departing from the width of transition part 13b
Spend the edge in direction.The advantages of this arrangement are as follows transition connection portion 2b is not contacted with active material 12, and it is difficult to and electrode group
Short circuit occurs for the electrode member of the opposite polarity of part 100, and security performance is more preferable.
The foregoing is merely the exemplary embodiments of the utility model, are not intended to limit the utility model, all in this reality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection domain.
Claims (13)
1. a kind of electrode member, which is characterized in that including electrode body (1) and conductive structure (2), electrode body (1) packet
The conductive layer (11) for including insulating body (10) and being set on the insulating body (10) surface, the conductive layer (11) have the
A part and from the first part extend second part, the first part be coated with active material (12), described second
The uncoated active material (12) in part；The conductive structure (2) is connected on the second part.
2. electrode member according to claim 1, which is characterized in that the conductive layer (11) is set to the insulating body
(10) on opposite sides surface, the conductive structure (2) includes the first conduct piece (21a), and first conduct piece (21a) is even
It is connected on the second part of (10) one side surface of insulating body.
3. electrode member according to claim 2, which is characterized in that the conductive structure (2) further includes the second conduct piece
(21b), second conduct piece (21b) are connected to the second part positioned at the insulating body (10) another side surface
On.
4. electrode member according to claim 3, which is characterized in that first conduct piece (21a) and described second is led
Electric part (21b) is directly connected to；Alternatively, the conductive structure (2) further includes conductive connection part (22), the conductive connection part (22)
It is connected between first conduct piece (21a) and the second conduct piece (21b).
5. electrode member according to claim 1, which is characterized in that the conductive structure (2) far from described first
The one end divided is extended to beyond one end far from the first part of the second part.
6. electrode member according to claim 1, which is characterized in that the width of the second part is more than the conductive knot
The width of structure (2).
7. electrode member according to claim 1, which is characterized in that the conductive structure (2) is welded with the second part
It connects, and the first weld part (1a) of formation is welded between the second part and the conductive structure (2) positioned at described second
The one end of the close first part divided.
8. according to any electrode members of claim 1-7, which is characterized in that the second part includes main part
(13a) and transition part (13b), the transition part (13b) are described between the main part (13a) and the first part
The width of transition part (13b) is more than the width of the main part (13a).
9. electrode member according to claim 8, which is characterized in that the conductive structure (2) includes main body connecting portion
(2a) and transition connection portion (2b), the transition connection portion (2b) is positioned at the main body connecting portion (2a) close to described first
The one end divided, the width of the transition connection portion (2b) are more than the width of the main body connecting portion (2a).
10. electrode member according to claim 9, which is characterized in that the main body connecting portion (2a) and the main part
(13a) connect and/or, the transition connection portion (2b) connect with the transition part (13b).
11. a kind of electrode assembly (100), which is characterized in that including such as claim 1-10 any one of them electrode member.
12. electrode assembly (100) according to claim 11, which is characterized in that the insulating body (10) with it is described
The corresponding part of second part and the second part form electric guide portion (13), and the electrode assembly (100) has multiple institutes
Electric guide portion (13) and multiple conductive structures (2) are stated, multiple electric guide portions (13) are stacked, and each two phase
There is the conductive structure (2) between the adjacent electric guide portion (13).
13. a kind of rechargeable battery, including afflux component (200), which is characterized in that further include as described in claim 11 or 12
Electrode assembly (100), the electrode member of the electrode assembly (100) pass through conductive structure (2) and the afflux component (200) electricity
Connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721570992.7U CN207542313U (en) | 2017-11-22 | 2017-11-22 | Electrode member, electrode assembly and rechargeable battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721570992.7U CN207542313U (en) | 2017-11-22 | 2017-11-22 | Electrode member, electrode assembly and rechargeable battery |
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| CN207542313U true CN207542313U (en) | 2018-06-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108963311A (en) * | 2018-07-13 | 2018-12-07 | 宁德时代新能源科技股份有限公司 | Secondary battery and pole piece thereof |
| WO2020024492A1 (en) * | 2018-08-02 | 2020-02-06 | 宁德时代新能源科技股份有限公司 | Electrode member, electrode assembly, and secondary battery |
| US11024870B2 (en) | 2018-10-11 | 2021-06-01 | Contemporary Amperex Technology Co., Limited | Secondary battery and electrode plate thereof |
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| CN114566768A (en) * | 2022-02-10 | 2022-05-31 | 东莞新能安科技有限公司 | Pole piece, electrochemical device and electronic equipment |
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| CN108963311A (en) * | 2018-07-13 | 2018-12-07 | 宁德时代新能源科技股份有限公司 | Secondary battery and pole piece thereof |
| CN111244388B (en) * | 2018-07-13 | 2022-02-25 | 宁德时代新能源科技股份有限公司 | Pole piece, manufacturing method of pole piece and secondary battery |
| CN111244388A (en) * | 2018-07-13 | 2020-06-05 | 宁德时代新能源科技股份有限公司 | Pole piece, manufacturing method of pole piece and secondary battery |
| JP2021532555A (en) * | 2018-08-02 | 2021-11-25 | 寧徳時代新能源科技股▲分▼有限公司Contemporary Amperex Technology Co., Limited | Electrode members, electrode assemblies and secondary batteries |
| KR20210024632A (en) * | 2018-08-02 | 2021-03-05 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Electrode member, electrode assembly, and secondary battery |
| EP3633766A4 (en) * | 2018-08-02 | 2020-07-29 | Contemporary Amperex Technology Co., Limited | Electrode member, electrode assembly, and secondary battery |
| WO2020024492A1 (en) * | 2018-08-02 | 2020-02-06 | 宁德时代新能源科技股份有限公司 | Electrode member, electrode assembly, and secondary battery |
| US11271273B2 (en) | 2018-08-02 | 2022-03-08 | Contemporary Amperex Technology Co., Limited | Electrode member, electrode assembly and secondary battery |
| US11367932B2 (en) | 2018-08-02 | 2022-06-21 | Contemporary Amperex Technology Co., Limited | Electrode member, electrode assembly and secondary battery |
| JP7187667B2 (en) | 2018-08-02 | 2022-12-12 | 寧徳時代新能源科技股▲分▼有限公司 | Electrode member, electrode assembly and secondary battery |
| KR102643846B1 (en) * | 2018-08-02 | 2024-03-06 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Electrode members, electrode assemblies and secondary batteries |
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| CN114566768A (en) * | 2022-02-10 | 2022-05-31 | 东莞新能安科技有限公司 | Pole piece, electrochemical device and electronic equipment |
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