CN209232866U - Secondary cell and battery modules - Google Patents
Secondary cell and battery modules Download PDFInfo
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- CN209232866U CN209232866U CN201822274741.5U CN201822274741U CN209232866U CN 209232866 U CN209232866 U CN 209232866U CN 201822274741 U CN201822274741 U CN 201822274741U CN 209232866 U CN209232866 U CN 209232866U
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- flow collection
- collection sheet
- tab
- secondary cell
- sheet
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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 relates to a kind of secondary cell and battery modules.Secondary cell, comprising: shell, shell include the receiving hole with opening；Cap assembly, cap assembly are hermetically connected with the shell with lid make and break mouth；Electrode assembly is set in receiving hole, and electrode assembly includes along two end faces opposite with the perpendicular first direction of the axial direction of receiving hole and the tab extended from each end face, and electrode assembly includes more than two electrode units along axially stacked setting；Afflux unit, afflux unit include the first sheet material and the first flow collection sheet for being connected to the first sheet material, and the first sheet material and the first flow collection sheet axially extend, and tab bends relative to first direction and is electrically connected to the first flow collection sheet.Tab included by the secondary cell of the utility model embodiment can be connected by afflux unit with cap assembly, and the afflux cellular construction originally implemented is simple, compact, be conducive to the energy density for improving secondary cell.
Description
Technical field
The utility model relates to battery technology fields, more particularly to a kind of secondary cell and battery modules.
Background technique
With the development of science and technology, secondary cell is in portable electrics such as mobile phone, DV and laptop computers
It is widely used in sub- equipment, and big in the electric vehicles such as electric car, electric bicycle and energy storage facility etc.
It has a wide range of applications in terms of medium-sized electrical equipment, becomes the weight for solving the global problems such as energy crisis and environmental pollution
Want technological means.In the prior art, secondary cell includes the afflux unit for having electrode assembly and connecting with electrode assembly.Electricity
The tab that pole component has end face and extends from end face, since preset clearance is smaller between afflux unit and end face,
When causing to be subjected to afflux unit and tab using welding equipment, operation difficulty is big, be easy to cause afflux unit and
There is the case where rosin joint in tab.
Utility model content
The utility model embodiment provides a kind of secondary cell and battery modules.Tab included by secondary cell can
It is connected by afflux unit with cap assembly, the afflux cellular construction originally implemented is simple, compact, is conducive to improve secondary electricity
The energy density in pond.
On the one hand, the utility model embodiment proposes a kind of secondary cell, comprising:
Shell, shell include the receiving hole with opening；Cap assembly, cap assembly are hermetically connected with the shell with lid make and break
Mouthful；Electrode assembly is set in receiving hole, and electrode assembly includes along opposite with the perpendicular first direction of the axial direction of receiving hole
Two end faces and the tab extended from each end face, electrode assembly include more than two electrode lists along axially stacked setting
Member；Afflux unit, afflux unit include the first sheet material and the first flow collection sheet for being connected to the first sheet material, and the first sheet material and first collect
Flow axially extends, and tab bends relative to first direction and is electrically connected to the first flow collection sheet.
According to the one aspect of the utility model embodiment, the first flow collection sheet has the first connection connecting with the first sheet material
End, the first connecting pin extend along with the perpendicular second direction of axial direction and first direction.
According to the one aspect of the utility model embodiment, the first flow collection sheet is located at the first sheet material close to the side of shell,
Tab is connected and fixed with the first flow collection sheet backwards to the surface of the first sheet material.
According to the one aspect of the utility model embodiment, afflux unit further includes the second afflux for being connected to the first sheet material
Piece, the first flow collection sheet and the second flow collection sheet axially extend, and the two is along axial least partially overlapped setting, electrode assembly
Quantity is two groups, and two arrays of electrodes component is electrically connected along axially stacked setting, the tab of one group of electrode assembly with the first flow collection sheet, separately
The tab of one group of electrode assembly is electrically connected with the second flow collection sheet.
According to the one aspect of the utility model embodiment, the first flow collection sheet and the second flow collection sheet are respectively positioned on the first sheet material and lean on
The side of nearly shell, the first flow collection sheet and the second flow collection sheet extend towards close to mutual direction.
According to the one aspect of the utility model embodiment, the first sheet material includes the main part axially extended and connection
In the first epitaxy part of main part, the first epitaxy part is along the second direction perpendicular with axial direction and first direction to outside main part
Side extends, and the first flow collection sheet and the second flow collection sheet are connected to the first epitaxy part along axial both ends.
According to the one aspect of the utility model embodiment, the first sheet material further includes the second extension for being connected to main part
Portion, the first epitaxy part and the axially spaced setting of the second epitaxy part are to form empty avoiding notch, and along axial direction, empty avoiding notch is located at first
Close to the side of cap assembly, tab can pass through empty avoiding notch and be connected with the first flow collection sheet flow collection sheet.
According to the one aspect of the utility model embodiment, empty avoiding notch extends in a second direction and crosses the first afflux
Piece.
According to the one aspect of the utility model embodiment, in the axial direction, at least part of the first epitaxy part and second
Epitaxy part overlaps.
According to the one aspect of the utility model embodiment, afflux unit further includes second to be connected with cap assembly
Material, main part and the intersection setting of the second sheet material, the first sheet material, the second sheet material, the first flow collection sheet and the second flow collection sheet are integral type
Structure.
According to the one aspect of the utility model embodiment, the quantity of afflux unit is two, in a first direction, electrode
Component is set between two afflux units, and two afflux units are electrically connected each by the first flow collection sheet with corresponding tab
It connects.
According to the one aspect of the utility model embodiment, the quantity of electrode assembly is two groups, and two arrays of electrodes component is along axis
To being stacked, every group of electrode assembly includes two electrode units, and electrode unit has sub- end face and extends from sub- end face
Sub- tab, two ipsilateral sub- end faces form end faces, and the sub- tab of two homopolarities collects to form tab, electrode unit
Sub- tab extends from sub- end face close to the side of another electrode unit in the axial direction.
According to the one aspect of the utility model embodiment, electrode unit tool there are two wide face and connection two wide faces two
A leptoprosopy, the axially opposed setting in two wide face, wide face and leptoprosopy are arranged alternately, and tab is from end face close to two electrode units
Extend in the region in two neighboring width face.
According to secondary cell provided by the embodiment of the utility model comprising there is the shell of receiving hole, be set to shell
Interior electrode assembly and the afflux unit for electric energy to be inputted or exported to electrode assembly.Afflux unit include the first sheet material with
And it is connected to the first flow collection sheet of the first sheet material.First flow collection sheet and the first sheet material are along the axially extending of receiving hole.Due to
One sheet material is close to electrode assembly, and the first flow collection sheet and electrode assembly distance are farther out, allows bit space so as to reserve, is convenient for
The first flow collection sheet is subjected to tab by using welding equipment, so that welding operation difficulty be effectively reduced, is improved
Welding quality.On the other hand, since the first flow collection sheet axially extends, thus reduce space occupancy rate in a first direction,
Therefore it is also beneficial to improve the energy density of secondary cell.
On the other hand, the utility model embodiment also provides a kind of battery modules, including more than two such as above-mentioned reality
The secondary cell of example is applied, more than two secondary cells are arranged side by side.
Detailed description of the invention
The feature, advantage and technical effect of the utility model exemplary embodiment are described below by reference to attached drawing.
Fig. 1 is the structural schematic diagram of the battery modules of an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the secondary cell of an embodiment of the present invention；
Fig. 3 is the decomposition texture schematic diagram of the secondary cell of an embodiment of the present invention；
Fig. 4 is the schematic cross-sectional view of the ontology of the electrode assembly of an embodiment of the present invention；
Fig. 5 is the decomposition texture schematic diagram of the secondary cell of another embodiment of the utility model；
Fig. 6 is the structural schematic diagram that afflux unit and tab are connected and fixed in Fig. 5；
Fig. 7 is the structural schematic diagram of the electrode unit of an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the afflux unit of an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the afflux unit of another embodiment of the utility model.
In the accompanying drawings, the attached drawing is not drawn according to the actual ratio.
Description of symbols:
10, secondary cell；
11, shell；11a, receiving hole；
12, cap assembly；121, lamina tecti；122, pole；
13, electrode assembly；13a, end face；13b, tab；131, electrode unit；131a, wide face；131b, leptoprosopy；131c,
Sub- end face；131d, sub- tab；
14, afflux unit；14a, the first flow collection sheet；14b, the second flow collection sheet；14c, the first connecting pin；14d, the second connection
End；141, the first sheet material；141a, main part；141b, the first epitaxy part；141c, the second epitaxy part；141d, empty avoiding notch；
142, the second sheet material；142a, boss；
X, axial direction；Y, first direction；Z, second direction；
20, battery modules.
Specific embodiment
The embodiments of the present invention is described in further detail with reference to the accompanying drawings and examples.Following embodiment
The detailed description and the accompanying drawings for illustratively illustrating the principles of the present invention, but cannot be used to limit the model of the utility model
It encloses, i.e., the utility model is not limited to described embodiment.
In the description of the present invention, it should be noted that unless otherwise indicated, the meaning of " plurality " is two or two
More than a；The orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right", "inner", "outside" is merely for convenience of retouching
State the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ",
" third " etc. is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill in the art,
Visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
The utility model in order to better understand, below with reference to Fig. 1 to Fig. 8 according to the battery mould of the utility model embodiment
Group 20 and secondary cell 10 are described in detail.
Shown in Figure 1, the utility model embodiment provides a kind of battery modules 20 comprising: more than two realities
Apply the secondary cell 10 of example and the busbar connector for connecting two secondary cells 10.More than two secondary cells 10 are along same
Direction is arranged side by side.One end of busbar connector is connected and fixed with a secondary cell 10 in two secondary cells 10, the other end with
Another secondary cell 10 is connected and fixed.More than two secondary cells 10 of the present embodiment can be along thickness direction side by side
It is arranged to form battery modules 20.
The secondary cell 10 of shown the utility model embodiment includes shell 11, is set in shell 11 referring to figs. 2 and 3
Electrode assembly 13 and with shell 11 be tightly connected cap assembly 12.
The shell 11 of the present embodiment can be four prisms cylinder shape or other shapes.Shell 11 has the receiving hole of opening
11a.Receiving hole 11a is used for accommodate electrod component 13 and electrolyte.Shell 11 can be by such as aluminium, aluminium alloy or plastic or other material
Manufacture.
The electrode assembly 13 of the utility model embodiment includes along the first direction Y perpendicular with the axial X of receiving hole 11a
The two opposite end face 13a and tab 13b extended from each end face 13a.In the present embodiment, each of electrode assembly 13
Extend a tab 13b on the 13a of end face.Each electrode assembly 13 has the two tab 13bs opposite along first direction Y,
In a tab 13b as anode ear, another is as negative electrode lug.
Referring to fig. 2 to shown in Fig. 4, the electrode assembly 13 of the present embodiment includes more than two axial X along receiving hole 11a
The electrode unit 131 being stacked.The electrode unit 131 of the present embodiment can be by by the first pole piece, the second pole piece and diaphragm
The sub- tab for stacking or winding together and form ontology and be connected with ontology.Diaphragm is between the first pole piece and the second pole
Insulator between piece.The electrode unit 131 of the present embodiment includes one layer of diaphragm, one layer of first pole piece, one layer of diaphragm and one layer
Second pole piece.In the present embodiment, illustratively using the first pole piece as positive plate, the second pole piece is illustrated for negative electrode tab.Together
Sample, in other examples, the first pole piece can also be negative electrode tab, and the second pole piece is positive plate.In addition, positive-active
Substance is applied on the coating area of positive plate, and negative electrode active material is applied on the coating area of negative electrode tab.Prolong from ontology
The uncoated area stretched out then is used as sub- tab.Electrode unit 131 includes two sub- tabs being oppositely arranged along first direction Y, i.e.,
Anode ear and negative electrode lug.Anode ear extends from the coating area of positive plate；Negative electrode lug extends from the coating area of negative electrode tab.First
Perpendicular to axial X, the exact vertical being vertically not limited in mathematical meaning here defines direction Y.Each electrode assembly 13
End face 13a include each electrode unit 131 sub- end face 131c, and the tab 13b of each electrode assembly 13 includes each electricity
The sub- tab 131d of pole unit 131.In one embodiment, shown in Figure 3, electrode unit 131 is flat structure, tool
There are two two leptoprosopy 131b in wide face and connection face 131a two wide.Face 131a two wide is oppositely arranged along axial X.Wide face
131a and leptoprosopy 131b are arranged alternately.
The cap assembly 12 and shell 11 of the present embodiment are tightly connected with lid make and break mouth.In one embodiment, top cover group
Part 12 includes lamina tecti 121 and pole 122.Cap assembly 12 is sealedly attached to shell 11 by lamina tecti 121.Pole 122 is set
It is placed in lamina tecti 121 and is electrically connected with electrode assembly 13 by afflux unit.
Shown in Figure 2, the secondary cell 10 of the utility model embodiment further includes by electrode assembly 13 and cap assembly
The 12 afflux units 14 being connected.In one example, tab 13b is connect by afflux unit 14 with pole 122.The present embodiment
Afflux unit 14 include the first sheet material 141 and the first flow collection sheet 14a for being connected to the first sheet material 141.First sheet material 141 and
One flow collection sheet 14a extends along axial X.In one embodiment, in a first direction on Y, the thickness direction of the first flow collection sheet 14a
It is identical as first direction Y with the thickness direction of the first sheet material 141.Further, the first flow collection sheet 14a and the first sheet material 141
Least partially overlapped setting.In one embodiment, at least part of the first sheet material 141 is located at an end of electrode assembly 13
Between face 13a and shell 11, and the first flow collection sheet 14a is connected to the end face 13a that the first sheet material 141 is located at electrode assembly 13
On part between shell 11.Tab 13b bends relative to first direction Y and is electrically connected to the first flow collection sheet 14a.One
In a embodiment, the part after tab 13b bending extends along axial X.Still optionally further, in a first direction on Y, tab 13b
It is connected to part, the first flow collection sheet 14a and the least partially overlapped setting of 141 three of the first sheet material of the first flow collection sheet 14a.
According to secondary cell 10 provided by the embodiment of the utility model comprising shell 11, setting with receiving hole 11a
In the electrode assembly 13 in shell 11 and the afflux unit 14 for electric energy to be inputted or exported to electrode assembly 13.Afflux unit
14 include the first sheet material 141 and the first flow collection sheet 14a for being connected to the first sheet material 141.First flow collection sheet 14a and the first sheet material
141 extend along the axial X of receiving hole 11a.The first sheet material as included by the afflux unit 14 of the utility model embodiment
The 141 and first flow collection sheet 14a, therefore the first sheet material 141 and the first flow collection sheet 14a own dimensions are small, and it is empty to occupy 11 inside of shell
Between it is few, to be conducive to save 11 inner space of shell, the energy density of secondary cell 10 is improved, on the other hand, due to first
Flow collection sheet 14a extends along axial X, to reduce the space occupancy rate on Y in a first direction, therefore is also beneficial to improve secondary electricity
The energy density in pond 10.In addition, the afflux unit 14 of the utility model embodiment can be by the tab 13b of electrode assembly 13 and top
The pole 122 of cap assemblies 12 is electrically connected.First flow collection sheet 14a includes the first flow collection sheet 14a for being electrically connected with tab 13b.
First flow collection sheet 14a can be connected and fixed with corresponding tab 13b.The afflux unit 14 of the present embodiment is by being set to first
The first flow collection sheet 14a and tab 13b on material 141 is connected and fixed.Under 14 use state of afflux unit of the present embodiment, first
Flow collection sheet 14a and electrode assembly 13 allow bit space apart from farther out, so as to reserve, convenient for by using welding equipment by the
One flow collection sheet 14a and tab 13b is subjected to, so that welding operation difficulty be effectively reduced, improves welding quality, Jin Eryou
Conducive to the stability that the first flow collection sheet 14a is connect with tab 13b is promoted, so that being not susceptible to separate each other, guarantee secondary cell
The stability and safety of 20 use processes.
The first flow collection sheet 14a of the utility model embodiment has the first connecting pin 14c connecting with the first sheet material 141.
First connecting pin 14c extends along with axial X and first direction Y perpendicular second direction Z, second direction Z and secondary cell 10
Thickness direction it is parallel.First flow collection sheet 14a is connected by the first connecting pin 14c with the first sheet material 141.Due to first
Z extends connecting pin 14c in a second direction, thus guarantee that the first flow collection sheet 14a is larger backwards to the surface area of electrode assembly 13, because
This tab 13b connect relatively reliable stabilization with the first flow collection sheet 14a.In one embodiment, tab 13b is in a second direction on Z
Length be greater than along axial X thickness, and length of the first flow collection sheet 14a on second direction Z be greater than itself along first direction Y
Thickness, thus guarantee the first flow collection sheet 14a and tab 13b join domain it is larger.In one example, the first flow collection sheet
14a is rectangular structure.Optionally, the first flow collection sheet 14a and tab 13b of the present embodiment can be by supersonic weldings in succession
It connects.
The first flow collection sheet 14a of the present embodiment is located at the first sheet material 141 close to the side of shell 11.Tab 13b and first
Flow collection sheet 14a is connected and fixed backwards to the surface of the first sheet material 141.First sheet material 141 is located at the first flow collection sheet 14a and electrode assembly
Between 13 end face 13a.First flow collection sheet 14a will not be in contact with the end face 13a of electrode assembly 13, be avoided in installation process
In or later period use process in the first flow collection sheet 14a scratch or damage electrode assembly 13 in electrode unit 131.Due to tab
13b is connected and fixed on surface of the first flow collection sheet 14a backwards to the first sheet material 141, so that the free end of tab 13b will not be
It turns down in installation process or in later period use process and is contacted with the end face 13a of electrode assembly 13, and then reduce tab 13b fold
A possibility that being inserted into end face 13a and 131 recurring structure of electrode unit caused to damage or is damaged.In addition, tab 13b, the first collection
The overall thickness of flow 14a and 141 three of the first sheet material in a first direction on Y is smaller, effectively reduces and occupies end face 13a and shell 11
Between space, to effectively improve the energy density of secondary cell 10.
Shown in referring to figs. 5 and 6, the afflux unit 14 of the present embodiment further includes the second collection for being connected to the first sheet material 141
Flow 14b.First flow collection sheet 14a and the second flow collection sheet 14b extends along axial X, and the two is least partially overlapped along axial X
Setting, to reduce the size of the first flow collection sheet 14a and the second flow collection sheet 14b on second direction Z.Second flow collection sheet 14b tool
There is the second connection end that Z extends in a second direction.Second flow collection sheet 14b is connected by second connection end with the first sheet material 141.
The quantity of electrode assembly 13 is two groups.Two arrays of electrodes component 13 is stacked along axial X, the tab 13b of one group of electrode assembly 13
It is electrically connected with the first flow collection sheet 14a, the tab 13b of another group of electrode assembly 13 is electrically connected with the second flow collection sheet 14b.By using
The homopolarity tab 13b of two arrays of electrodes component 13 is connected and is realized current remittance by the first flow collection sheet 14a and the second flow collection sheet 14b
Collection.First flow collection sheet 14a is connected to by a tab 13b thus it is possible, on the one hand, can be avoided and multiple electrodes unit 131 occur
When, lead to tab 13b and the excessively high situation of the first flow collection sheet 14a link position temperature；On the other hand, tab 13b extend compared with
Short size can first flow collection sheet 14a corresponding with position or the second flow collection sheet 14b be connected and fixed, without tab
13b extend end face 13a size it is too long be connected to the first flow collection sheet 14a so that 131 processing dimension of electrode unit unite
One, manufacturing procedure is unified, reduces processing and manufacturing difficulty and processing cost.
In one embodiment, every group of electrode assembly 13 includes two electrode units 131.Electrode unit 131 has son
The end face 131c and sub- tab 131d extended from sub- end face 131c.Two ipsilateral sub- end face 131c formation end face 13a, and two
The sub- tab 131d of a homopolarity collects to form tab 13b.The sub- tab 131d of one electrode unit 131 is in the axial direction from sub- end face
131c extends close to the region of another electrode unit 131, so that the respective sub- tab 131d of two electrode units 131 is mutual
It is close and extend shorter distance and can accumulate the pole being connected and fixed with the first flow collection sheet 14a and the second flow collection sheet 14b
Ear 13b.Thus it is possible, on the one hand, sub- tab 131d will not lead to the case where length redundancy occur since itself development length is too long.
When redundancy condition occurs in sub- tab 131d, it is easy to cause sub- tab 131d bending region of stress concentration occur and the feelings that are broken
Condition, on the other hand, the extension size of sub- tab 131d control in lesser range, advantageously reduce sub- tab 131d and collect shape
At tab 13b occupied space rate, improve secondary cell 10 energy density.
The first flow collection sheet 14a and the second flow collection sheet 14b of the present embodiment are respectively positioned on the first sheet material 141 close to the one of shell 11
Side.First flow collection sheet 14a and the second flow collection sheet 14b extends along axial X.First flow collection sheet 14a and the second flow collection sheet 14b court lean on
Nearly mutual direction extends, thus between the first flow collection sheet 14a and the second flow collection sheet 14b and end face 13a by the first sheet material 141 every
It leaves, so that the first flow collection sheet 14a and the second flow collection sheet 14b will not be in contact with the end face 13a of electrode assembly 13.Due to
One flow collection sheet 14a and the second flow collection sheet 14b extends towards close to mutual direction, to reduce the occupied space rate on axial X, has
Conducive to the energy density for improving secondary cell 10.Optionally, the thickness of the thickness direction of the second flow collection sheet 14b and the first sheet material 141
It is identical to spend direction, and the thickness direction of the two is identical as first direction Y.The knot of second flow collection sheet 14b and the first flow collection sheet 14a
Structure is identical.Optionally, the second flow collection sheet 14b and tab 13b of the present embodiment can pass through ultrasonic bonding connection.
Shown in Figure 7, first sheet material 141 of the present embodiment includes along the axial X main part 141a extended and connection
In the first epitaxy part 141b of main part 141a.First epitaxy part 141b is along the second party perpendicular with axial X and first direction Y
Extend to the outside of Z-direction main part 141a.First flow collection sheet 14a and the second flow collection sheet 14b are connected to the first epitaxy part
141b is along the both ends of axial X.Two arrays of electrodes component 13 is stacked along axial X, therefore respective tab 13b is along the axial interval X
Setting.Two tab 13b positioned at 13 the same side of electrode assembly can be respectively around the first epitaxy part 141b along the opposite of axial X
Two ends and be connected and fixed with the first flow collection sheet 14a and the second flow collection sheet 14b.Due to the first flow collection sheet 14a and the second afflux
Piece 14b is connected to the opposite both ends the first epitaxy part 141b, thus the size of the tab 13b extended do not need it is too long i.e.
It can be connected and fixed with the first flow collection sheet 14a or the second flow collection sheet 14b, therefore effectively shorten the length that tab 13b extends, favorably
In the space occupancy rate for reducing tab 13b, the energy density of secondary cell 10 is improved, while processing cost is also effectively reduced.
Shown in Figure 8, first sheet material 141 of the present embodiment further includes the second epitaxy part for being connected to main part 141a
141c.First epitaxy part 141b and the second epitaxy part 141c is arranged along the axial interval X to form empty avoiding notch 141d.Along receiving hole
The axial X of 11a, empty avoiding notch 141d are located at the first flow collection sheet 14a close to the side of cap assembly 12.Tab 13b can be passed through
Empty avoiding notch 141d is connected with the first flow collection sheet 14a.First sheet material 141 can pass through main part 141a and the second epitaxy part
141c is electrically connected with pole 122 jointly.Second epitaxy part 141c can enhance the strength and stiffness and first of the first sheet material 141
The area of passage of sheet material 141.In one embodiment, empty avoiding notch 141d is along perpendicular with axial X and first direction Y second
Direction Z extends and crosses the first flow collection sheet 14a.In this way, tab 13b is from empty avoiding notch 141d when passing through, tab 13b will not be with
Main part 141a is in contact and causes main part 141a to form tab 13b and squeeze, to reduce tab 13b by main part
A possibility that 141a extruding deforms or is damaged, while also reducing tab 13b and dislocation occurs and causes and the first flow collection sheet 14a
A possibility that join domain is inaccurate, unstable.In one example, clearance structure is the groove body that Z extends in a second direction.
In one embodiment, on axial X, at least part of the first epitaxy part 141b and the second epitaxy part 141c weight
Folded setting.In this way, can guarantee to design on the first sheet material 141 under the premise of not increasing the first 141 overall dimensions of sheet material
Empty avoiding notch 141d, while guaranteeing that main part 141a and the second sheet material connection transition region have bigger area of passage, thus one
Aspect is conducive to improve the structural compactness of the first sheet material 141, is conducive to the energy density for improving secondary cell 10, on the other hand
Also guarantee between the first sheet material 141 and the second sheet material have good conveyance capacity, promoted 10 job stability of secondary cell and
Reliability.
Referring to shown in Fig. 7 or Fig. 8, the afflux unit 14 of the present embodiment further includes second to be connected with cap assembly 12
Material 142.Main part 141a and the intersection setting of the second sheet material 142.Second sheet material 142 extends along first direction Y.The of the present embodiment
The thickness direction of two sheet materials 142 is identical as axial direction X.Second sheet material 142 has the boss 142a far from electrode assembly 13.Second
Material 142 is electrically connected by boss 142a with pole 122 included by cap assembly 12.In one embodiment, the first sheet material
141, the second sheet material 142, the first flow collection sheet 14a and the second flow collection sheet 14b are an integral structure, on the one hand guarantee afflux list
The overall structural strength and impact resistance of member 14, on the other hand, afflux unit 14 can be added by being integrally formed processing method
Work manufacture, reduces manufacturing procedure, reduces processing cost.
In one embodiment, the quantity of afflux unit 14 can be one.Two tab 13b of one electrode assembly 13
It is anode ear and negative electrode lug respectively.First flow collection sheet 14a included by afflux unit 14 can be electrically connected with anode ear or negative electrode lug
It connects.In another embodiment, referring to shown in Fig. 3 or Fig. 5, the quantity of afflux unit 14 is two.Two afflux units 14 exist
Setting is spaced on first direction Y.In a first direction on Y, electrode assembly 13 is set between two afflux units 14.Electrode assembly
The ontology of electrode unit 131 included by 13 is between two afflux units 14, and two pole included by electrode assembly 13
Ear 13b respectively corresponds two afflux units 14.One tab 13b and an afflux unit 14 are connected, another tab 13b and
Another afflux unit 14 is connected.In the present embodiment, two afflux units 14 each by the first flow collection sheet 14a with it is corresponding
Tab 13b electrical connection.
In one embodiment, electrode assembly 13 includes two electrode units 131.There are two wide faces for the tool of electrode unit 131
131a and two leptoprosopy 131b for connecting face 131a two wide.Face 131a two wide is oppositely arranged along axial X.Wide face 131a and narrow
Face 131b is arranged alternately.Tab 13b prolongs from end face 13a close to the region of the adjacent face 131a two wide of two electrode units 131
It stretches out, so that tab 13b is generally in the middle section of end face 13a in axial X-direction, guarantees from two electrode units 131
The size of the two sub- tab 131d drawn is roughly the same, is conducive to electrode unit 131 and fabricates process consistency, reduces and add
Work manufacturing cost.
The battery modules 20 of the utility model embodiment include multiple secondary cells 10 being arranged side by side in the same direction.By
The electrode unit 131 included by each secondary cell 10 of the present embodiment is set along the axial X stacking of the receiving hole 11a of shell 11
It sets.When the electrode unit 131 of the present embodiment expands, mainly along the axial X dilatancy of receiving hole 11a, and in secondary electricity
Swell increment in the orientation in pond 10 is smaller.In this way, each secondary cell 10 accumulated in orientation expansion resultant force compared with
It is small.In the orientation of secondary cell 10, battery modules 20 do not need to constrain using the structural member with higher-strength to
Disappearing expansive force or can constrain counteracting expansive force using more low intensive structural member, so that the entirety of battery modules 20 be effectively reduced
Quality effectively promotes the energy density of battery modules 20 so that 20 self structure of battery modules is more compact.Meanwhile battery mould
Group 20 from 10 thickness direction of secondary cell swell increment it is smaller or without swell increment, can effectively promote use process and pacify
Quan Xing.
Although the present utility model has been described by reference to the preferred embodiments, but in the model for not departing from the utility model
In the case where enclosing, various improvement can be carried out to it and can replace component therein with equivalent, especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments be can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but is included all technical solutions falling within the scope of the claims.
Claims (14)
1. a kind of secondary cell characterized by comprising
Shell, the shell include the receiving hole with opening；
Cap assembly, the cap assembly are connect to cover and close the opening with the housing seal；
Electrode assembly is set in the receiving hole, and the electrode assembly includes along perpendicular with the axial direction of the receiving hole
The tab two opposite end faces of first direction and extended from each end face, the electrode assembly include two or more
Along the electrode unit of the axially stacked setting；
Afflux unit, the afflux unit include the first sheet material and the first flow collection sheet for being connected to first sheet material, and described
Along described axially extending, the tab bends and is electrically connected relative to the first direction for one sheet material and first flow collection sheet
It is connected to first flow collection sheet.
2. secondary cell according to claim 1, which is characterized in that first flow collection sheet has and first sheet material
First connecting pin of connection, first connecting pin are prolonged along the second direction perpendicular with the axial direction and the first direction
It stretches.
3. secondary cell according to claim 1, which is characterized in that first flow collection sheet is located at first sheet material and leans on
The side of the nearly shell, the tab are connected and fixed with first flow collection sheet backwards to the surface of first sheet material.
4. secondary cell according to claim 1, which is characterized in that the afflux unit further includes being connected to described first
Second flow collection sheet of sheet material, first flow collection sheet and second flow collection sheet are along described axially extending, and the two is along described
Axial least partially overlapped setting, the quantity of the electrode assembly are two groups, and electrode assembly described in two groups is along described axially stacked
Setting, the tab of electrode assembly described in one group are electrically connected with first flow collection sheet, the institute of electrode assembly described in another group
Tab is stated to be electrically connected with second flow collection sheet.
5. secondary cell according to claim 4, which is characterized in that first flow collection sheet and second flow collection sheet are equal
Positioned at first sheet material close to the side of the shell, first flow collection sheet and second flow collection sheet towards close to mutual
Direction extends.
6. secondary cell according to claim 4, which is characterized in that first sheet material includes along described axially extending
Main part and the first epitaxy part for being connected to the main part, the first epitaxy part edge and the axial direction and the first party
Extend to perpendicular second direction to the outside of the main part, first flow collection sheet and second flow collection sheet connect respectively
First epitaxy part is connected to along the axial both ends.
7. secondary cell according to claim 6, which is characterized in that first sheet material further includes being connected to the main body
Second epitaxy part in portion, first epitaxy part and second epitaxy part are arranged to form empty avoiding and lack along the axially spaced-apart
Mouthful, along the axial direction, the empty avoiding notch is located at first flow collection sheet close to the side of the cap assembly, the tab energy
It is enough to be connected across the empty avoiding notch with first flow collection sheet.
8. secondary cell according to claim 7, which is characterized in that the empty avoiding notch extends simultaneously along the second direction
Cross first flow collection sheet.
9. secondary cell according to claim 7, which is characterized in that in the axial direction, first epitaxy part is extremely
Few a part and second epitaxy part overlap.
10. secondary cell according to claim 6, which is characterized in that the afflux unit further includes and the top cover group
The second sheet material that part is connected, the main part and second sheet material intersection setting, it is first sheet material, second described
Material, first flow collection sheet and second flow collection sheet are an integral structure.
11. secondary cell according to claim 1, which is characterized in that the quantity of the afflux unit is two, described
On first direction, the electrode assembly is set between two afflux units, and two afflux units are each by institute
The first flow collection sheet is stated to be electrically connected with the corresponding tab.
12. secondary cell according to claim 1, which is characterized in that the quantity of the electrode assembly is two groups, two groups of institutes
Electrode assembly is stated along the axially stacked setting, electrode assembly described in every group includes two electrode units, the electrode
The sub- tab that unit has sub- end face and extends from the sub- end face, two ipsilateral sub- end faces form the end face,
The sub- tab of two homopolarities collects to form the tab, and the sub- tab of an electrode unit is in the axial direction
Extend from the sub- end face close to the side of electrode unit described in another.
13. secondary cell according to claim 12, which is characterized in that there are two wide face and connections for the electrode unit tool
Two leptoprosopy in two wide faces, two wide faces are along the axially opposing setting, the width face and leptoprosopy alternating
Setting, the tab extend from the end face close to the region in two adjacent wide faces of two electrode units.
14. a kind of battery modules, which is characterized in that including more than two as claim 1 to 13 is described in any item secondary
Battery, more than two secondary cells are arranged side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274741.5U CN209232866U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274741.5U CN209232866U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
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| CN209232866U true CN209232866U (en) | 2019-08-09 |
Family
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| CN201822274741.5U Active CN209232866U (en) | 2018-12-29 | 2018-12-29 | Secondary cell and battery modules |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134745A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Secondary cell, cell module, and manufacturing method for secondary cell |
| WO2020134747A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| CN111463367A (en) * | 2019-01-22 | 2020-07-28 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| CN113904037A (en) * | 2021-10-27 | 2022-01-07 | 厦门海辰新能源科技有限公司 | Battery cell and battery pack |
| CN115241610A (en) * | 2022-05-20 | 2022-10-25 | 远景动力技术(江苏)有限公司 | Current collecting component, battery unit and electronic equipment |
| EP4030537A4 (en) * | 2020-05-09 | 2023-02-22 | Contemporary Amperex Technology Co., Limited | Secondary battery and manufacturing method therefor, battery module, and apparatus |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020134745A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Secondary cell, cell module, and manufacturing method for secondary cell |
| WO2020134747A1 (en) * | 2018-12-29 | 2020-07-02 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| CN111384350A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| US11139540B2 (en) | 2018-12-29 | 2021-10-05 | Contemporary Amperex Technology Co., Limited | Battery module and battery pack |
| US11335978B2 (en) | 2018-12-29 | 2022-05-17 | Contemporary Amperex Technology Co., Limited | Secondary battery and battery module |
| CN111463367A (en) * | 2019-01-22 | 2020-07-28 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
| EP4030537A4 (en) * | 2020-05-09 | 2023-02-22 | Contemporary Amperex Technology Co., Limited | Secondary battery and manufacturing method therefor, battery module, and apparatus |
| US11929510B2 (en) | 2020-05-09 | 2024-03-12 | Contemporary Amperex Technology Co., Limited | Secondary battery and manufacturing method thereof, battery module, and apparatus |
| CN113904037A (en) * | 2021-10-27 | 2022-01-07 | 厦门海辰新能源科技有限公司 | Battery cell and battery pack |
| CN115241610A (en) * | 2022-05-20 | 2022-10-25 | 远景动力技术(江苏)有限公司 | Current collecting component, battery unit and electronic equipment |
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