CN208478390U - Cap assembly and secondary cell - Google Patents
Cap assembly and secondary cell Download PDFInfo
- Publication number
- CN208478390U CN208478390U CN201821197510.2U CN201821197510U CN208478390U CN 208478390 U CN208478390 U CN 208478390U CN 201821197510 U CN201821197510 U CN 201821197510U CN 208478390 U CN208478390 U CN 208478390U
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- liquid injection
- injection hole
- ontology
- cap assembly
- boss
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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 cap assembly and secondary cells.Cap assembly includes: lamina tecti and electrode terminal component；Lamina tecti includes: ontology, and electrode terminal component is set to ontology, and ontology has opposite first surface and second surface and the first liquid injection hole through first surface and second surface；Boss, boss are set to second surface and are located at the intermediate region of ontology, and boss has occlusion part, the interconnecting piece of connection occlusion part and ontology, occlusion part and the interconnecting piece transition chamber thereof formed and the second liquid injection hole being connected with transition chamber thereof；Wherein, transition chamber thereof is connected with the first liquid injection hole, and occlusion part at least partly blocks the first liquid injection hole along the axial projection of the first liquid injection hole.Cap assembly provided by the embodiment of the utility model can carry out water conservancy diversion to electrolyte in injection electrolyte process can be avoided electrolyte and directly impacts electrode assembly to change the flow direction of electrolyte.
Description
Technical field
The utility model relates to battery technology fields, more particularly to a kind of cap assembly and secondary cell.
Background technique
Secondary cell generally comprises electrode assembly, shell and cap assembly.Wherein, electrode assembly passes through positive plate, cathode
Piece and the diaphragm being set between positive plate and negative electrode tab surround the wireline reel coil of wire around formation.Electrode assembly is housed in shell
Interior, cap assembly and shell are assembled together and and the corresponding setting in end of the electrode assembly on winding axis.Cap assembly
Lamina tecti include lamina tecti and the electrode terminal that is set on lamina tecti, the wherein tab of electrode assembly and cap assembly
Electrode terminal electrical connection.Lamina tecti is equipped with the liquid injection hole being connected with enclosure space.
However, due on power battery lamina tecti in the prior art liquid injection hole and electrode assembly winding axis on
Position is opposite each other for end, therefore when the axis of liquid injection hole is in vertical direction, the electricity injected by liquid injection hole into shell
Solution liquid can flow along the vertical direction and (in order to improve the efficiency of injection electrolyte, generally require the injection pressure for increasing electrolyte),
To which electrolyte can impact end of the electrode assembly on winding axis, at this time since the impact force of electrolyte is excessive,
To will lead to the positive plate in end position and the diaphragm between negative electrode tab deforms displacement, and then it will lead to positive plate
It is in contact with each other with negative electrode tab and short circuit occurs.
Utility model content
The utility model embodiment provides a kind of cap assembly and secondary cell.Cap assembly can be in injection electrolyte
Carry out water conservancy diversion to electrolyte in process can be avoided electrolyte and directly impacts electrode assembly to change the flow direction of electrolyte.
On the one hand, the utility model embodiment proposes a kind of cap assembly for secondary cell comprising:
Lamina tecti and electrode terminal component；Lamina tecti includes: ontology, and electrode terminal component is set to ontology, ontology tool
There are opposite first surface and second surface and the first liquid injection hole through first surface and second surface；Boss, boss are set
It is placed in second surface and is located at the intermediate region of ontology, boss has occlusion part, the interconnecting piece for connecting occlusion part and ontology, blocks
Portion and the interconnecting piece transition chamber thereof formed and the second liquid injection hole being connected with transition chamber thereof；Wherein, transition chamber thereof and first
Liquid injection hole is connected, and occlusion part at least partly blocks the first liquid injection hole along the axial projection of the first liquid injection hole.
According to the one aspect of the utility model embodiment, occlusion part has backwards to the outer surface of ontology, the face of outer surface
Product is more than or equal to the area of the first liquid injection hole, and occlusion part fully blocks the first fluid injection along the axial projection of the first liquid injection hole
Hole.
According to the one aspect of the utility model embodiment, occlusion part has the inner surface towards transition chamber thereof, the second note
The hole wall of fluid apertures have be flush with inner surface or lower than inner surface region.
According to the one aspect of the utility model embodiment, interconnecting piece is cylindrical in shape structure, and it is remote that occlusion part is set to interconnecting piece
The quantity of end from ontology, the second liquid injection hole is two or more, and more than two second liquid injection holes are in the circumferential direction of interconnecting piece
It is uniformly distributed.
According to the one aspect of the utility model embodiment, ontology structure in long strip, ontology is included in length side
The second liquid injection hole, interconnecting piece is arranged towards the part of first end on interconnecting piece in opposite first end and the second end upwards
On towards the part of the second end be also provided with the second liquid injection hole.
According to the one aspect of the utility model embodiment, the area of the second liquid injection hole and the area ratio of interconnecting piece are
0.2~0.6.
According to the one aspect of the utility model embodiment, the second liquid injection hole is flat hole, and the second liquid injection hole is along boss week
To full-size be greater than the second liquid injection hole along boss height direction full-size.
According to the one aspect of the utility model embodiment, occlusion part has the inner surface towards transition chamber thereof, and boss is also
Including the first raised line being set on inner surface, the quantity of the first raised line is two, two the first raised line interval settings, interconnecting piece
The corresponding part in the upper gap between two the first raised lines is provided with the second liquid injection hole.
According to the one aspect of the utility model embodiment, boss further includes the second raised line, and the second raised line is set to interior table
Face, the second raised line intersect setting with the first raised line.
The cap assembly of the utility model embodiment includes lamina tecti and electrode terminal component.Lamina tecti include ontology with
And it is set to the boss on ontology.Ontology has the first liquid injection hole.Boss has the transition chamber thereof being connected with the first liquid injection hole
And the second liquid injection hole being connected with transition chamber thereof.Boss includes interconnecting piece and occlusion part.Occlusion part at least partly blocks
First liquid injection hole, to stop for being formed to the electrolyte by the first liquid injection hole and transition chamber thereof, to change electrolyte
Flow direction, and flowed out from the second liquid injection hole for intersecting setting with the first liquid injection hole.In this way, being connected and fixed in cap assembly and shell
Afterwards, electrode assembly will not be directly impacted from the electrolyte that the second liquid injection hole is discharged, is effectively reduced electrolyte to electrode assembly
Impact force, reduce electrode assembly be damaged, the probability of deformation or short circuit.
On the other hand, a kind of secondary cell is provided according to the utility model embodiment comprising:
Shell has opening；Electrode assembly by positive plate, negative electrode tab and is set between positive plate and negative electrode tab
Diaphragm around the wireline reel coil of wire around formation, electrode assembly is set in shell and electrode assembly is correspondingly arranged with opening；As above
State the cap assembly of embodiment, electrode assembly is enclosed in shell by cap assembly covering opening, the second surface of ontology and
Boss is towards shell.
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 schematic cross-sectional view of the secondary cell of an embodiment of the present invention；
Fig. 2 is the schematic cross-sectional view of the secondary cell of another embodiment of the utility model；
Fig. 3 is the schematic cross-sectional view of the cap assembly of an embodiment of the present invention；
Fig. 4 is the partial enlarged view in Fig. 3 at A；
Fig. 5 is the overall structure diagram of the lamina tecti of an embodiment of the present invention；
Fig. 6 is the decomposition texture schematic diagram of the cap assembly of an embodiment of the present invention；
Fig. 7 is the partial enlarged view in Fig. 6 at B.
In the accompanying drawings, the attached drawing is not drawn according to the actual ratio.
Description of symbols:
1, secondary cell；
10, shell；
20, electrode assembly；20a, winding axis；201, end face；
30, cap assembly；
30a, lamina tecti；30b, electrode terminal component；
301, ontology；3011, first surface；3012, second surface；3013, the first liquid injection hole；
302, boss；3021, occlusion part；3021a, outer surface；3021b, inner surface；3022, interconnecting piece；3023, transition
Chamber；3024, the second liquid injection hole；3025, the first raised line；3026, the second raised line；
303, rupture pressure disc.
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 "
Etc. being 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. 7 to the cap assembly of the utility model embodiment
30 are described in detail.
Referring to shown in Fig. 1, Fig. 2, the secondary cell 1 of the utility model embodiment includes shell 10, is set in shell 10
Electrode assembly 20 and the cap assembly 30 that is connected with electrode assembly 20.
Positive plate, negative electrode tab and diaphragm by being surrounded winding axis 20a spiral shell by the electrode assembly 20 of the present embodiment together
Circumvolution around and formed, wherein diaphragm is the insulator between positive plate and negative electrode tab.Electrode assembly 20 has along wireline reel
Two line 20a opposite ends and the outer peripheral surface around winding axis 20a.Helical form knot is presented in the end face 201 of each end
Structure.
The shell 10 of the present embodiment is the tubular structure with opening.The electrode assembly 20 of the present embodiment can be by opening
Mouth is packed into shell 10.The cap assembly 30 of the present embodiment can cover opening and be tightly connected with shell 10, be accommodated with being formed
The confined space of electrode assembly 20.The shell 10 and cap assembly 30 of the present embodiment are tightly connected with encapsulated electrode component 20.?
In one example, as shown in Figure 1, an end face 201 and the cap assembly 30 of electrode assembly 20 are correspondingly arranged ginseng.Cap assembly
30 can be electrically connected with tab set on corresponding end on electrode assembly 20.In another example, referring to figure
Shown in 2, outer peripheral surface and the cap assembly 30 of electrode assembly 20 are correspondingly arranged.Cap assembly 30 can be with the end of electrode assembly 20
Upper set tab is electrically connected.
The cap assembly 30 of the utility model embodiment includes lamina tecti 30a and the electrode being set on lamina tecti 30a
Terminal assemblies 30b.When the cap assembly 30 of the present embodiment is applied to secondary cell 1, lamina tecti 30a and shell 10 can be passed through
It is tightly connected.
Referring to shown in Fig. 3, Fig. 4, the lamina tecti 30a of the present embodiment includes ontology 301 and is set to convex on ontology 301
Platform 302.Ontology 301 has electrode fairlead.Electrode terminal component 30b is set to ontology 301, and is at least partially disposed at
In electrode fairlead.Ontology 301 has opposite first surface 3011 and second surface 3012 and runs through first surface 3011
With the first liquid injection hole 3013 of second surface 3012.Boss 302 is set to second surface 3012 and is located at the centre of ontology 301
Region.Here the intermediate region of ontology 301 refers to including the middle section of ontology 301 and the center close to ontology 301
The region in region.The interconnecting piece 3022 that boss 302 has occlusion part 3021, connects occlusion part 3021 and ontology 301.Boss 302
Also there is occlusion part 3021 and the transition chamber thereof 3023 formed of interconnecting piece 3022 and be connected with transition chamber thereof 3023 second
Liquid injection hole 3024.The transition chamber thereof 3023 of the present embodiment is connected with the first liquid injection hole 3013.Occlusion part 3021 is along the first note
The first liquid injection hole 3013 is at least partly blocked in the axial projection of fluid apertures 3013.
In one embodiment, the second liquid injection hole 3024 extends along the radial direction of the first liquid injection hole 3013, so that first
The intersection of the axis of liquid injection hole 3013 and the second liquid injection hole 3024.Ontology 301 is the stripe board with predetermined length, width and thickness
Shape structure, first surface 3011 and second surface 3012 are oppositely arranged in a thickness direction.Ontology 301 has in length
First end, middle part and the second end being sequentially distributed on direction.First end and the second end are provided with electrode tip
Sub-component 30b.First liquid injection hole 3013 and boss 302 are all set in middle part.At this point, above-mentioned radial direction also refer to
The direction of thickness direction intersection.Second liquid injection hole 3024 of the present embodiment is at least partially disposed on interconnecting piece 3022.This reality
The ontology 301 for applying example can be with generally rectangular shaped structure.
When the cap assembly 30 of the utility model embodiment is applied to secondary cell 1, ontology included by lamina tecti 30a
301 second surface 3012 and boss 302 is towards electrode assembly 20.Boss 302 is protruded towards electrode assembly 20.Into
When row injection electrolyte operation, priming device can be connected with the first liquid injection hole 3013, to pass through the first liquid injection hole 3013, mistake
It crosses chamber 3023 and the second liquid injection hole 3024 injects electrolyte into shell 10.Electrolyte finally can be from the second liquid injection hole
3024 enter in shell 10.Due to the second liquid injection hole 3024 radially extending along the first liquid injection hole 3013, and the first liquid injection hole
3013 portions 3021 that are at least partly blocked are blocked, therefore occlusion part 3021 can be to passing through the first liquid injection hole 3013 and adapter cavity
The electrolyte of room 3023, which is formed, to be stopped, to change the flow direction of electrolyte, so that electrolyte intersects from the first liquid injection hole 3013
When the second liquid injection hole 3024 outflow being arranged, relative to the flow direction in the first liquid injection hole 3013, flowed out from the second liquid injection hole 3024
Flow direction substantially deviate 50 ° to 130 °.
When the cap assembly 30 of the utility model embodiment is applied to secondary cell 1, a side is had following technical effect that
Face, when an end face 201 of electrode assembly 20 is correspondingly arranged with cap assembly 30, from the electrolysis of the second liquid injection hole 3024 discharge
Liquid will not directly act on the end of electrode assembly 20, have after the drainage of occlusion part 3021 and the second liquid injection hole 3024
Effect ground reduces electrolyte to the impact force of the end of electrode assembly 20, reduces diaphragm and is led by being displaced after electrolyte impact
It causes failure of insulation and then causes the probability of positive plate and negative electrode tab generation short circuit；On the other hand, when the outer peripheral surface of electrode assembly 20
When being correspondingly arranged with cap assembly 30, the electrolyte being discharged from the second liquid injection hole 3024 is passing through occlusion part 3021 and the second fluid injection
After the drainage in hole 3024, the outer peripheral surface of electrode assembly 20 will not be directly acted on, is effectively reduced electrolyte to electrode assembly 20
Outer peripheral surface impact force, avoid the outer peripheral surface of electrode assembly 20 by electrolyte impact after, itself is recessed, to reduce
Positive plate and/or negative electrode tab deform because of recess or the probability of cracked damage；In another aspect, since boss 302 is set
It is placed in the intermediate region of ontology 301, therefore electrolyte is in the second liquid injection hole 3024 injection shell 10 included by the boss 302
When, electrolyte can flow expansion towards surrounding simultaneously in the center of outer surface corresponding with ontology 301 from electrode assembly 20
It dissipates, so that electrolyte can quickly and uniformly submerge electrode assembly 20, and then is conducive to the whole infiltration degree of electrode assembly 20
Uniformly, wetting velocity is unified, improves the infiltration integrality of electrode assembly 20, avoids occurring electroless liquid leaching inside electrode assembly 20
Occur the different situation of infiltration degree inside profit region or electrode assembly 20, and then promotes the recycling longevity of secondary cell 1
Life.
Shown in Figure 5, occlusion part 3021 included by the utility model embodiment boss 302 has backwards to ontology 301
Outer surface 3021a.In one embodiment, the area of outer surface 3021a be more than or equal to the first liquid injection hole 3013 area and
Occlusion part 3021 fully blocks the first liquid injection hole 3013 along the axial projection of the first liquid injection hole 3013, thus the first liquid injection hole
3013 portions 3021 that are blocked completely are blocked, and the electrolyte injected from the first liquid injection hole 3013 can all be blocked portion 3021
Blocking and change flow direction, and finally flowed into shell 10 by the second liquid injection hole 3024, further promoted included by boss 302
Occlusion part 3021 to the blocking capability of electrolyte.In one embodiment, the outer surface 3021a of occlusion part 3021 is plane.
After lamina tecti 30a and shell 10 are tightly connected, the outer surface 3021a of occlusion part 3021 can be in contact with electrode assembly 20,
To which occlusion part 3021 can press on electrode assembly 20.In such manner, it is possible to reduce a possibility that play occurs for electrode assembly 20.By
It is plane in the outer surface 3021a of occlusion part 3021, therefore the outer surface 3021a of occlusion part 3021 applies electrode assembly 20
Pressure is more balanced, disperses.
Occlusion part 3021 included by the boss 302 of the utility model embodiment have towards transition chamber thereof 3023 and with
The inner surface 3021b that outer surface 3021a is oppositely arranged.Second liquid injection hole 3024 is set to interconnecting piece 3022.Second liquid injection hole
3024 hole wall has to be flush or the region lower than inner surface 3021b with inner surface 3021b, so that interconnecting piece 3022 forms the
It is not in step structure between the part of two liquid injection holes 3024 and the inner surface 3021b of occlusion part 3021.In this way, entering
The electrolyte crossed in chamber 3023 all can enter the second liquid injection hole 3024 from transition chamber thereof 3023, to avoid the occurrence of electrolysis
Liquid occurs being detained in transition chamber thereof 3023 or residual condition.
The interconnecting piece 3022 of the utility model embodiment is cylindrical in shape structure.It is separate that occlusion part 3021 is set to interconnecting piece 3022
The end of ontology 301.The quantity of second liquid injection hole 3024 is two or more.More than two second liquid injection holes 3024 are in interconnecting piece
It is uniformly distributed in 3022 circumferential direction, advantageously ensures that the flow velocity substantially phase for the electrolyte being discharged out of each second liquid injection hole 3024
Together.
In one embodiment, ontology 301 is in bar shaped plate structure.Ontology 301 includes opposite on length direction
First end and the second end.The second liquid injection hole 3024 is set towards the part of first end on interconnecting piece 3022.Interconnecting piece
The second liquid injection hole 3024 is also provided with towards the part of the second end on 3022.Towards the part of first end from interconnecting piece 3022
The flow direction of the electrolyte for the second liquid injection hole 3024 injection being arranged is set on interconnecting piece 3022 towards the part of the second end
Length direction flowing but flow direction of the flow direction of the electrolyte for the second liquid injection hole 3024 injection set along ontology 301 are opposite.
In this way, electrode assembly 20 can be quickly totally submerged by the electrolyte for the second liquid injection hole 3024 being arranged from boss 302, from
And be conducive to promote 20 effect of impregnation of electrode assembly, and then promote the service life cycle of secondary cell 1.
In one embodiment, the ratio between the area of the second liquid injection hole 3024 and the area of interconnecting piece 3022 is 0.2
~0.6.Ratio between the two area is less than 0.2 and when fluid injection rate is constant, since the aperture of the second liquid injection hole 3024 is inclined
It is small, prevent electrolyte influences fluid injection efficiency from successfully flowing into inside shell 10.Ratio between the two area is greater than
When 0.6, the aperture of the second liquid injection hole 3024 is bigger than normal, so that the entirety of interconnecting piece 3022 is less than normal, stiffness by itself and intensity are deteriorated.
In this way, electrode assembly 20 can generate upward impact force to boss 302, thus interconnecting piece 3022 when secondary cell 1 vibrates
It is prone to fracture with the contact portion of ontology 301 or interconnecting piece 3022 itself is prone to torsional deformation, and then causes to hide
Stopper 3021 is displaced and can not be formed and be blocked to the first liquid injection hole 3013, so that the electrolysis injected from the first liquid injection hole 3013
Liquid directly acts on electrode assembly 20 and causes to impact to electrode assembly 20.
In one embodiment, the second liquid injection hole 3024 is flat hole.The circumferential direction along boss 302 of second liquid injection hole 3024
Full-size be greater than the second liquid injection hole 3024 the short transverse along boss 302 full-size.Here short transverse refers to
Be direction that boss 302 extends far from ontology 301, also also refer to the thickness direction of ontology 301.In this way, guaranteeing the
Under the premise of the aperture of two liquid injection holes 3024 meets fluid injection requirement, the whole height of interconnecting piece 3022 can be effectively reduced, so that
302 compact overall structure of boss, height is lower, to reduce boss 302 to the occupancy of 10 inner space of shell, is conducive to mention
The energy density of high secondary cell 1.Optionally, the second liquid injection hole 3024 can be with generally rectangular hole or slotted eye.
In one embodiment, on the length direction of ontology 301, the periphery of interconnecting piece 3022 included by boss 302
Face has opposite first area and second area.On interconnecting piece 3022 with position corresponding to first area and second area
The second liquid injection hole 3024 of upper setting, thus can be along the length direction stream of ontology 301 from the electrolyte that the second liquid injection hole 3024 is discharged
It is dynamic.When lamina tecti 30a and shell 10 are tightly connected, since 301 length of ontology is longer, from 3024 row of the second liquid injection hole
Electrolyte out will not impact shell 10, will not cause to impact and the broadside of shell 10 and ontology 301 is caused to connect to shell 10
There is gap in the place of connecing, shell 10 will not be caused to deform under the impact force action of electrolyte.
The occlusion part 3021 of the utility model embodiment has towards transition chamber thereof 3023 and opposite with outer surface 3021a
The inner surface 3021b of setting.Boss 302 further includes the first raised line 3025 being set on inner surface 3021b.The present embodiment
The opposite end of first raised line 3025 can be connected with interconnecting piece 3022, can also form gap between interconnecting piece 3022.
Preferably, two opposed ends of the first raised line 3025 are connected with interconnecting piece 3022 respectively, so that the first raised line 3025 will hide
The inner surface 3021b of stopper 3021 is separated into different regions.It is set on position corresponding with each region on interconnecting piece 3022
It is equipped with the second liquid injection hole 3024 being connected with transition chamber thereof 3023, it can hence into the electrolyte arrived in transition chamber thereof 3023
It is flowed to different zones and be discharged from corresponding second liquid injection hole 3024 by the shunting of the first raised line 3025.In this way, due to first
The compartmentation of raised line 3025, so that transition chamber thereof 3023 can be relative to close to first close to the part of inner surface 3021b
The part of liquid injection hole 3013 is narrowed, so that the flow velocity close to inner surface 3021b is greater than under electrolyte pressure same case
It close to the flow velocity of the first liquid injection hole 3013, and then more quickly move through in the second liquid injection hole 3024 injection shell 10, effectively contracts
Residence time of the short electrolyte in transition chamber thereof 3023 improves fluid injection efficiency.
In one embodiment, referring to shown in Fig. 6, Fig. 7, the quantity of the first raised line 3025 can be multiple.Multiple first
Raised line 3025 can be intervally installed.Preferably, the quantity of the first raised line 3025 is two.Two the first raised line 3025 intervals
Setting.The corresponding part in gap on interconnecting piece 3022 between two the first raised lines 3025 is provided with the second liquid injection hole
3024.The inner surface 3021b of occlusion part 3021 is accordingly separated into three different zones by two the first raised lines 3025.One
In a example, two the first raised lines 3025 extend along the width direction of ontology 301.
In one embodiment, boss 302 further includes the second raised line 3026.Second raised line 3026 is set to occlusion part 3021
Inner surface 3021b.Second raised line 3026 intersects setting with the first raised line 3025.First raised line 3025 and the second raised line 3026 are total
Different regions is separated by the inner surface 3021b of occlusion part 3021.In one example, the quantity of the first raised line 3025 is
Two, the quantity of the second raised line 3026 is one.Second raised line 3026 is substantially perpendicular with the first raised line 3025.Second raised line
3026 opposite two end is connected with the intermediate position of two the first raised lines 3025 respectively, so that being formed substantially is in " H "
The structure of shape.
The material of the lamina tecti 30a of the present embodiment can be plastic cement.In one example, sheet included by lamina tecti 30a
Body 301 and boss 302 can be separate structure.In another example, ontology 301 and boss 302 included by lamina tecti 30a
It can also be fabricated by the way of integrated injection molding, improve self-strength and compactness, guarantee the shock resistance of boss 302
Performance, itself stress are not susceptible to deform, to avoid the occurrence of after lamina tecti 30a and shell 10 are tightly connected, boss 302
The case where being caused by exogenic action displacement deformation and causing occlusion part 3021 that can not block the first liquid injection hole 3013.
Referring to fig. 4, shown in Fig. 6, the cap assembly 30 of the present embodiment further includes rupture pressure disc 303.From first surface 3011
To the direction of second surface 3012, namely on the thickness direction of ontology 301, rupture pressure disc 303 is respectively arranged at boss 302
The two sides of ontology 301.Rupture pressure disc 303 and ontology 301 are tightly connected and cover the first liquid injection hole 3013, in the outer of ontology 301
Side cover closes the first liquid injection hole 3013.Electricity is completed by the first liquid injection hole 3013, transition chamber thereof 3023 and the second liquid injection hole 3024
After solving liquid injection work, rupture pressure disc 303 and ontology 301 are connected and fixed.It is secondary to be encountered in 1 use process of secondary cell
When the excessive situation of 1 internal pressure of battery, gas can pass through the second liquid injection hole 3024, transition chamber thereof 3023 and the first liquid injection hole
3013 and to rupture pressure disc 303 apply active force.When pressure inside secondary cell 1 reaches 303 preset pressure value of rupture pressure disc, prevent
Explosion occurs for quick-fried valve 303, and the gas inside secondary cell 1 is released, and to complete pressure release, avoids secondary cell 1 from occurring quick-fried
It is fried, guarantee the safety in utilization of secondary cell 1.By the first liquid injection hole 3013, transition chamber thereof 3023 and the second liquid injection hole 3024
Mode as reservoir channel and gas passage simultaneously, can effectively reduce opening on the ontology 301 included by lamina tecti 30a
Hole number, can promote the structural strength and rigidity of ontology 301 itself, while can also reduce the manufacturing procedure of ontology 301, drop
Low processing cost.
The cap assembly 30 of the utility model embodiment includes lamina tecti 30a and electrode terminal component 30b.Lamina tecti
30a includes ontology 301 and the boss being set on ontology 301 302.Ontology 301 has the first liquid injection hole 3013.Boss 302
With the transition chamber thereof 3023 being connected with the first liquid injection hole 3013 and the second liquid injection hole being connected with transition chamber thereof 3023
3024.Boss 302 includes interconnecting piece 3022 and occlusion part 3021.Occlusion part 3021 at least partly blocks the first liquid injection hole
3013, stopped with that can be formed to the electrolyte by the first liquid injection hole 3013 and transition chamber thereof 3023, to change electrolyte
Flow direction so that electrolyte from intersect with the first liquid injection hole 3013 setting the second liquid injection hole 3024 flow out when, relative to first
Flow direction in liquid injection hole 3013, the flow direction flowed out from the second liquid injection hole 3024 substantially deviate 50 ° to 130 °.In this way, in top cover group
After part 30 and shell 10 are connected and fixed, the electrolyte being discharged from the second liquid injection hole 3024 will not directly impact electrode assembly 20
End face 201 or outer peripheral surface are effectively reduced electrolyte to the impact force of electrode assembly 20, reduce electrode assembly and be damaged, become
Shape or the probability of short circuit.
Shown in Figure 1, the utility model embodiment also proposes a kind of secondary cell 1 comprising shell 10, electrode assembly
20 and above-described embodiment cap assembly 30.
The shell 10 of the present embodiment has opening.Optionally, shell 10 can have hexahedral shape or other shapes.Shell
10 inner spaces with accommodate electrod component 20 and electrolyte.Electrode assembly 20 can be encased in inside sky by opening
Between.Shell 10 can be manufactured by such as aluminium, aluminium alloy or plastic or other material.
The electrode assembly 20 of the present embodiment by positive plate, negative electrode tab and be set between positive plate and negative electrode tab every
Film winds to be formed around winding axis 20a.Electrode assembly 20 has two ends opposite along winding axis 20a.Electrode assembly
20 are set in shell 10 and are correspondingly arranged with opening.
The cap assembly 30 and shell 10 of the present embodiment are tightly connected and cover opening, and electrode assembly 20 is enclosed in shell
In body 10.The second surface 3012 and boss 302 of ontology 301 included by cap assembly 30 are arranged towards shell 10.
In one embodiment, when an end face 201 of electrode assembly 20 and cap assembly 30 are correspondingly arranged, this implementation
The cap assembly 30 of example has the function of that blocking electrolyte directly impacts the end face 201 of electrode assembly 20, therefore is effectively ensured pair
When completing the progress fluid injection of secondary cell 1 of encapsulation, diaphragm included by electrode assembly 20 not will receive the impact of electrolyte and send out
Raw displacement leads to failure of insulation, effectively improves the safety that secondary cell 1 completes yields and use process after fluid injection.One
In a example, occlusion part 3021 included by lamina tecti 30a is resisted against the end face 201 of electrode assembly 20.Optionally, occlusion part
Ratio between 3021 and the area of the end face 201 of the area being in contact of end face 201 of electrode assembly 20 and electrode assembly 20 is
0.05~0.4.The end face 201 of area and electrode assembly 20 that occlusion part 3021 is in contact with the end face 201 of electrode assembly 20
When ratio between area is less than 0.05, occlusion part 3021 and the contact area of the end face 201 of electrode assembly 20 are too small, are easy to lead
Cause occlusion part 3021 is biggish to the part generation of the end face 201 of electrode assembly 20 to compress stress, so that electrode assembly 20
Local deformation is excessive, and diaphragm is caused to be displaced and the case where failure of insulation occur.The end of occlusion part 3021 and electrode assembly 20
When ratio between the area of the end face 201 of the area that face 201 is in contact and electrode assembly 20 is greater than 0.4, when interconnecting piece 3022
On be provided with extending direction be ontology 301 length direction the second liquid injection hole 3024 when namely interconnecting piece 3022 in ontology
When the second liquid injection hole 3024 is arranged in opposite two sides on 301 length direction, opening and the shell 10 of the second liquid injection hole 3024
Hypotelorism.In this way, the electrolyte being discharged from the second liquid injection hole 3024 can generate impact force to shell 10, there are shells 10 and top
A possibility that junction generation crack of ontology 301 included by cover board 30a or shell 10 deform in itself.
In another embodiment, when the outer peripheral surface of electrode assembly 20 and cap assembly 30 are correspondingly arranged, the present embodiment
Cap assembly 30 have the function of that electrolyte is stopped directly to impact the outer peripheral surface of electrode assembly 20.Therefore it is effectively reduced electrolysis
Liquid is to the impact force of the outer peripheral surface of electrode assembly 20, after avoiding the outer peripheral surface of electrode assembly 20 from being impacted by electrolyte, itself hair
Raw recess effectively improves secondary cell to reduce positive plate and/or negative electrode tab deforms or the probability of cracked damage
1 completes the safety of yields and use process after fluid injection.In one example, occlusion part included by lamina tecti 30a
3021 are resisted against the outer peripheral surface of electrode assembly 20, effectively limit electrode assembly 20, prevent electrode assembly 20 from occurring in shell 10
Play.
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 (10)
1. a kind of cap assembly (30) for secondary cell characterized by comprising
Lamina tecti (30a) and electrode terminal component (30b)；
The lamina tecti (30a) includes:
Ontology (301), the electrode terminal component (30b) are set to the ontology (301), and the ontology (301) has opposite
First surface (3011) and second surface (3012) and run through the first surface (3011) and the second surface
(3012) the first liquid injection hole (3013)；
Boss (302), the boss (302) are set to the second surface (3012) and are located at the centre of the ontology (301)
Region, the connection that the boss (302) has occlusion part (3021), connects the occlusion part (3021) and the ontology (301)
Transition chamber thereof (3023) that portion (3022), the occlusion part (3021) and the interconnecting piece (3022) are formed and with the transition
The second liquid injection hole (3024) that chamber (3023) is connected；
Wherein, the transition chamber thereof (3023) is connected with first liquid injection hole (3013), and the occlusion part (3021) is along institute
First liquid injection hole (3013) is at least partly blocked in the axial projection for stating the first liquid injection hole (3013).
2. cap assembly (30) according to claim 1, which is characterized in that the occlusion part (3021) has backwards to described
The area of the outer surface (3021a) of ontology (301), the outer surface (3021a) is more than or equal to first liquid injection hole (3013)
Area, and the occlusion part (3021) fully blocks described first along the axial projection of first liquid injection hole (3013)
Liquid injection hole (3013).
3. cap assembly (30) according to claim 1, which is characterized in that the occlusion part (3021) has described in
The hole wall of the inner surface (3021b) of transition chamber thereof (3023), second liquid injection hole (3024) has and the inner surface
(3021b) is flush or the region lower than the inner surface (3021b).
4. cap assembly (30) according to claim 1, which is characterized in that the interconnecting piece (3022) is cylindrical in shape structure,
The occlusion part (3021) is set to the end of the interconnecting piece (3022) far from the ontology (301), second liquid injection hole
(3024) quantity is two or more, circumferential direction of more than two second liquid injection holes (3024) in the interconnecting piece (3022)
On be uniformly distributed.
5. cap assembly (30) according to any one of claims 1 to 4, which is characterized in that the ontology (301) is in bar shaped
Plate structure, the ontology (301) include first end and the second end opposite on length direction, the interconnecting piece
(3022) second liquid injection hole (3024), direction on the interconnecting piece (3022) are set towards the part of the first end on
The part of the second end is also provided with second liquid injection hole (3024).
6. cap assembly (30) according to claim 1, which is characterized in that the area of second liquid injection hole (3024) with
The area ratio of the interconnecting piece (3022) is 0.2~0.6.
7. cap assembly (30) according to claim 1, which is characterized in that second liquid injection hole (3024) is flat
Hole, second liquid injection hole (3024) are greater than second liquid injection hole (3024) along the full-size of the boss (302) circumferential direction
Along the full-size of the boss (302) short transverse.
8. cap assembly (30) according to claim 1, which is characterized in that the occlusion part (3021) has described in
The inner surface (3021b) of transition chamber thereof (3023), the boss (302) further include being set on the inner surface (3021b)
First raised line (3025), the quantity of first raised line (3025) are two, two the first raised line (3025) interval settings,
The corresponding part in gap on the interconnecting piece (3022) between two first raised lines (3025) is provided with described
Two liquid injection holes (3024).
9. cap assembly (30) according to claim 8, which is characterized in that the boss (302) further includes the second raised line
(3026), second raised line (3026) is set to the inner surface (3021b), second raised line (3026) and described first
Raised line (3025) intersection setting.
10. a kind of secondary cell (1) characterized by comprising
Shell (10) has opening；
Electrode assembly (20) passes through positive plate, negative electrode tab and the diaphragm being set between the positive plate and the negative electrode tab
It is formed around winding axis (20a) winding, the electrode assembly (20) is set in the shell (10) and the electrode assembly
(20) it is correspondingly arranged with the opening；
Cap assembly (30) as claimed in any one of claims 1-9 wherein, the cap assembly (30) cover the opening, with
The electrode assembly (20) is enclosed in the shell (10), the second surface (3012) of the ontology (301) and institute
Boss (302) is stated towards the shell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821197510.2U CN208478390U (en) | 2018-07-26 | 2018-07-26 | Cap assembly and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821197510.2U CN208478390U (en) | 2018-07-26 | 2018-07-26 | Cap assembly and secondary cell |
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|---|---|
| CN208478390U true CN208478390U (en) | 2019-02-05 |
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ID=65208003
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| WO2021004226A1 (en) * | 2019-07-09 | 2021-01-14 | 宁德时代新能源科技股份有限公司 | Top cover assembly and secondary battery |
| CN112768849A (en) * | 2021-02-01 | 2021-05-07 | 深圳市力德科技有限公司 | Liquid injection method of battery core and lithium battery liquid injection device |
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| WO2022205463A1 (en) * | 2021-04-02 | 2022-10-06 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery cell, battery, and method and device for manufacturing battery cell |
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| CN115995642A (en) * | 2023-02-09 | 2023-04-21 | 深圳海润新能源科技有限公司 | End cover assembly, energy storage device and electric equipment |
| WO2023133775A1 (en) * | 2022-01-13 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| WO2024016308A1 (en) * | 2022-07-22 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | End cover assembly for battery cell, battery cell, battery and electric device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021004226A1 (en) * | 2019-07-09 | 2021-01-14 | 宁德时代新能源科技股份有限公司 | Top cover assembly and secondary battery |
| US11509026B2 (en) | 2019-07-09 | 2022-11-22 | Contemporary Amperex Technology Co., Limited | Cap assembly and secondary battery |
| CN112768849A (en) * | 2021-02-01 | 2021-05-07 | 深圳市力德科技有限公司 | Liquid injection method of battery core and lithium battery liquid injection device |
| WO2022205463A1 (en) * | 2021-04-02 | 2022-10-06 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery cell, battery, and method and device for manufacturing battery cell |
| CN113363638A (en) * | 2021-06-04 | 2021-09-07 | 宁德新能源科技有限公司 | Battery and electric equipment |
| WO2023133775A1 (en) * | 2022-01-13 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| WO2024016308A1 (en) * | 2022-07-22 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | End cover assembly for battery cell, battery cell, battery and electric device |
| CN115173006A (en) * | 2022-08-30 | 2022-10-11 | 江苏时代新能源科技有限公司 | Liquid injection structure of single battery, battery and power utilization device |
| CN115995642A (en) * | 2023-02-09 | 2023-04-21 | 深圳海润新能源科技有限公司 | End cover assembly, energy storage device and electric equipment |
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