CN209104287U - Secondary cell - Google Patents
Secondary cell Download PDFInfo
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- CN209104287U CN209104287U CN201821967956.9U CN201821967956U CN209104287U CN 209104287 U CN209104287 U CN 209104287U CN 201821967956 U CN201821967956 U CN 201821967956U CN 209104287 U CN209104287 U CN 209104287U
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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
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Abstract
The utility model provides a kind of secondary cell comprising first electrode component, second electrode component, shell, cap assembly and radiating subassembly.First electrode component and second electrode component through-thickness are arranged and are contained in shell.Cap assembly is connected to shell.Shell has bottom wall, and bottom wall and cap assembly are located at the opposite two sides of first electrode component.Radiating subassembly includes thermally conductive sheet and insulating trip.Thermally conductive sheet includes the first heat-conducting part and the second heat-conducting part；First heat-conducting part is set between first electrode component and second electrode component, and the second heat-conducting part bends from one end of the separate cap assembly of the first heat-conducting part and extends between first electrode component and bottom wall.Insulating trip includes first part, is set between the second heat-conducting part and first electrode component.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cells.
Background technique
Secondary cell includes electrode assembly, shell and cap assembly, and electrode assembly is housed in shell, cap assembly connection
In shell electrode assembly to be sealed in shell.In order to improve the capacity of secondary cell, electrode assembly is usually arranged as multiple.
However, electrode assembly meeting heat production, heat in charge and discharge process are gathered between adjacent electrode assembly；With gathering for heat
Collection, causes electrode assembly temperature rise excessively high, influences performance and the service life of electrode assembly.
Utility model content
In view of the problems in the background art, the purpose of this utility model is to provide a kind of secondary cells, can subtract
Few hot stack, improves the performance of electrode assembly, reduces security risk.
To achieve the goals above, the utility model provides a kind of secondary cell comprising first electrode component, second
Electrode assembly, shell, cap assembly and radiating subassembly.First electrode component and second electrode component through-thickness arrangement and receipts
It is dissolved in shell.Cap assembly is connected to shell.Shell has bottom wall, and bottom wall and cap assembly are located at first electrode component
Opposite two sides.Radiating subassembly includes thermally conductive sheet and insulating trip.Thermally conductive sheet includes the first heat-conducting part and the second heat-conducting part；First leads
Hot portion is set between first electrode component and second electrode component, separate cap assembly of second heat-conducting part from the first heat-conducting part
One end bend and extend between first electrode component and bottom wall.Insulating trip includes first part, is set to the second heat-conducting part
Between first electrode component.
In one embodiment, thermally conductive sheet further includes third heat-conducting part, separate top cover of the third heat-conducting part from the first heat-conducting part
One end of component bends and extends between second electrode component and bottom wall.Insulating trip further includes second part, is set to second
Between electrode assembly and third heat-conducting part.
Thermally conductive sheet further includes the 4th heat-conducting part, and the 4th heat-conducting part is set to the separate second electrode component of first electrode component
Side, and the 4th heat-conducting part be connected to the second heat-conducting part far from the first heat-conducting part one end.
Thermally conductive sheet further includes the 5th heat-conducting part, and the 5th heat-conducting part is set to the separate first electrode component of second electrode component
Side, and the 5th heat-conducting part be connected to third heat-conducting part far from the first heat-conducting part one end.
First part is connected to second part；Insulating trip forms through-hole, and first between the first and second
Heat-conducting part protrudes into through-hole.Alternatively, first part and second part are separated from each other, and the second heat-conducting part is fixed in first part
Surface, second part is fixed on the surface of third heat-conducting part.
In another embodiment, insulating trip further includes second part, and second part is connected to first part and is set to
Between two electrode assemblies and bottom wall；Insulating trip forms through-hole between the first and second, and the first heat-conducting part protrudes into
Through-hole.
Insulating trip further includes Part III, and Part III is fixed on the table of the close second electrode component of the first heat-conducting part
Face.
The thickness of second heat-conducting part is greater than the thickness of the first heat-conducting part.
The material of thermally conductive sheet is graphite.
The beneficial effects of the utility model are as follows: in this application, by the way that thermally conductive sheet is arranged, can effectively discharge electrode
Heat between component reduces hot stack, improves the performance of electrode assembly；By the way that insulating trip is arranged, it can avoid thermally conductive sheet and cause
Short circuit reduces security risk.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the first embodiment of the secondary cell of the utility model.
Fig. 2 is the enlarged drawing of the Blocked portion of Fig. 1.
Fig. 3 is the cross-section diagram of the electrode assembly of Fig. 1.
Fig. 4 is the exploded view of the secondary cell of Fig. 1, and wherein shell omits.
Fig. 5 is the schematic diagram according to the second embodiment of the secondary cell of the utility model.
Fig. 6 is the schematic diagram according to the 3rd embodiment of the secondary cell of the utility model.
Fig. 7 is the schematic diagram according to the fourth embodiment of the secondary cell of the utility model.
Fig. 8 is the schematic diagram according to the 5th embodiment of the secondary cell of the utility model.
Fig. 9 is the schematic diagram of the radiating subassembly of Fig. 8.
Wherein, the reference numerals are as follows:
1 first electrode component, 522 second part
2 second electrode component, 523 Part III
3 shell, 524 Part IV
31 bottom wall, 525 Part V
4 cap assembly, 526 Part VI
41 lamina tecti, 527 Part VII
42 electrode terminal, 6 anode pole piece
5 radiating subassembly, 7 cathode pole piece
51 thermally conductive sheet, 8 diaphragm
511 first heat-conducting part, 9 third electrode assembly
The 4th electrode assembly of 512 second heat-conducting part 10
513 third heat-conducting part H through-holes
514 the 4th heat-conducting part X length directions
515 the 5th heat-conducting part Y thickness directions
52 insulating trip Z height directions
521 first parts
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
In the description of the present application unless specifically defined or limited otherwise, term " first ", " second ", " third " are only
For descriptive purposes, it is not understood to indicate or imply relative importance；Term " multiple " refers to two or more；
Unless otherwise prescribed or illustrate, term " connection ", " fixation " etc. shall be understood in a broad sense, for example, " connection " can be fixed company
It connects, may be a detachable connection, or be integrally connected, or electrical connection or signal connection；" connection " can be directly connected,
It can also be indirectly connected through an intermediary.For the ordinary skill in the art, can understand as the case may be
The concrete meaning of above-mentioned term in this application.
In the description of this specification, it is to be understood that the nouns of locality such as "upper", "lower" described in the embodiment of the present application are
With angle shown in the drawings come what is be described, the restriction to the embodiment of the present application should not be construed as.In addition, within a context,
It is also to be appreciated that can not only directly connect when mentioning an element and being connected to another element "upper" or "lower"
Connect another element "upper" perhaps "lower" can also be indirectly coupled to by intermediary element another element "upper" or
"lower".The application is described in further detail below by specific embodiment and in conjunction with attached drawing.
Referring to Fig.1, the secondary cell of the application includes electrode assembly, shell 3, cap assembly 4 and radiating subassembly 5.
Electrode assembly is that multiple and through-thickness Y is sequentially arranged.Referring to Fig. 3, each electrode assembly include anode pole piece 6,
Cathode pole piece 7 and diaphragm 8, diaphragm 8 are set between anode pole piece 6 and cathode pole piece 7.Electrode assembly is by being helically wrapped just
Pole pole piece 6, cathode pole piece 7 and diaphragm 8 press to form flat structure to be formed by pressure.Electrode assembly is secondary electricity
The core component of pond realization charging/discharging function.Anode pole piece 6, cathode pole piece 7 and diaphragm 8 are wound round wireline reel, the volume
Short transverse Z is in substantially parallel relationship to around axis.In this application, electrode assembly can be two or four.
In order to separate anode pole piece 6 and cathode pole piece 7, on short transverse Z, the width of diaphragm 8 is typically larger than just
The width of pole pole piece 6 and the width of cathode pole piece 7.
Shell 3 can have hexahedral shape or other shapes.Accommodating chamber is formed inside shell 3, to accommodate electrolyte and institute
State multiple electrodes component.Shell 3 forms opening at one end, and electrode assembly can be placed into the receiving of shell 3 via described be open
Chamber.Shell 3 can be made of the material of conductive metal, it is preferable that shell 3 is made of aluminum or aluminum alloy.Along short transverse Z, shell 3
There is bottom wall 31 in one end far from opening.
Cap assembly 4 includes lamina tecti 41 and the electrode terminal 42 for being set to lamina tecti 41.Lamina tecti 41 is set to shell 3
And the opening of shell 3 is covered, so that the multiple electrode assembly is enclosed in shell 3.Lamina tecti 41 can pass through the side of welding
Formula is connected to shell 3.Lamina tecti 41 and bottom wall 31 are located at the multiple electrode assembly along the both ends of short transverse Z.
Electrode terminal 42 can be two, and an electrode terminal 42 is electrically connected to anode pole piece 6, another 42 electricity of electrode terminal
It is connected to cathode pole piece 7.
Each electrode assembly can heat production in charge and discharge process；Since the gap between adjacent electrode assembly is smaller (even
Gapless), therefore heat can be gathered between adjacent electrode assembly, it is difficult to release outward；With the aggregation of heat, lead to electricity
Pole component temperature rise is excessively high, influences performance and the service life of electrode assembly.And in order to discharge heat, guarantee the property of electrode assembly
Can, the secondary cell of the application is provided with radiating subassembly 5.
The radiating subassembly 5 of the application is described in detail with different embodiments below.
In the first embodiment, referring to Fig. 2 and Fig. 4, the electrode assembly of the application can be four, i.e., first electrode component 1,
Second electrode component 2, third electrode assembly 9 and the 4th electrode assembly 10, third electrode assembly 9, first electrode component 1, second
Electrode assembly 2 and 10 through-thickness Y of the 4th electrode assembly are set gradually.
Radiating subassembly 5 includes thermally conductive sheet 51, and thermally conductive sheet 51 includes the first heat-conducting part 511 and the second heat-conducting part 512.First leads
Hot portion 511 is set between first electrode component 1 and second electrode component 2, and the second heat-conducting part 512 is from the first heat-conducting part 511
One end far from cap assembly 4 bends and extends between first electrode component 1 and bottom wall 31.First heat-conducting part 511 substantially hangs down
Directly in the second heat-conducting part 512, in other words, thermally conductive sheet 51 is L shape.Second heat-conducting part 512 can directly be contacted with bottom wall 31, can also
Pass through other heat-conducting pieces and 31 mediate contact of bottom wall.
In the charge and discharge process of secondary cell, the heat that first electrode component 1 and second electrode component 2 generate can be passed
It is delivered to the first heat-conducting part 511, the heat on the first heat-conducting part 511 is transmitted to bottom wall 31 via the second heat-conducting part 512, and bottom wall 31 will
Heat is spilt into external environment, so that heat be avoided to be gathered between first electrode component 1 and second electrode component 2, reduces temperature
It rises, improves the performance of first electrode component 1 and second electrode component 2.
In field of batteries, the insulating materials used inside secondary cell is mostly high molecular material, such as polypropylene, poly-
Ethylene etc.；However, the thermal coefficient of these insulating materials is less than normal, generally 0.2W/mK~0.3W/mK, heating conduction is poor,
It generally can not be as the material of thermally conductive sheet 51.Therefore, in order to improve rate of heat dispation, thermally conductive sheet 51, which generallys use, to be had compared with high thermal conductivity
Material of coefficient, such as graphite, metal etc..The thermal coefficient of graphite is 300W/mK~1800W/mK, has good lead
Hot property improves the performance of electrode assembly to avoid hot stack.
However, graphite etc. has the material of high thermal conductivity generally conductive, if the second heat-conducting part 512 is directly
It is contacted with the bottom end (i.e. one end of the close bottom wall 31 of diaphragm 8) of first electrode component 1, then when secondary cell vibration, the
Two heat-conducting parts 512 are easy to contact with anode pole piece 6 and cathode pole piece 7, cause first electrode component 1 short-circuit, cause security risk.
Therefore, to avoid short circuit, the radiating subassembly 5 of the application further includes insulating trip 52, and insulating trip 52 includes first
Divide 521, is set between the second heat-conducting part 512 and first electrode component 1.First part 521 can by the second heat-conducting part 512 with
The bottom end of first electrode component 1 separates, to avoid the second heat-conducting part 512 that anode pole piece 6 and cathode pole piece 7 are connected, reduces
Security risk.Meanwhile first part 521 and the second heat-conducting part 512 can also support first electrode component 1 from downside.
In conclusion in this application, by the way that thermally conductive sheet 51 is arranged, can effectively discharge the heat between electrode assembly
Amount reduces hot stack, improves the performance of electrode assembly；By the way that insulating trip 52 is arranged, it can avoid thermally conductive sheet 51 and cause short circuit, reduce
Security risk.
Insulating trip 52 further includes second part 522, and second part 522 is connected to first part 521 and is set to the second electricity
Between pole component 2 and bottom wall 31.Insulating trip 52 can support all electrode assemblies from downside.
Insulating trip 52 forms through-hole H between first part 521 and second part 522, and the first heat-conducting part 511 protrude into it is logical
Hole H.By the way that through-hole H is arranged, the second heat-conducting part 512 can be folded into the downside of insulating trip 52.Through-hole H can be X along its length
The strip-shaped hole of extension.
In order to improve radiating efficiency, between third electrode assembly 9 and first electrode component 1 settable one it is L-shaped thermally conductive
Piece 51, a settable L-shaped thermally conductive sheet 51 between the 4th electrode assembly 10 and second electrode component 2.
For each electrode assembly, outmost turns are diaphragm 8, so two adjacent electrode assemblies are insulated from each other.However,
In the forming process of secondary cell, some metallic particles can be remained in shell 3, metallic particles may puncture outside electrode assembly
The diaphragm 8 of circle.And since the first heat-conducting part 511 is conductive, if first electrode component 1 and second electrode component 2
Diaphragm it is damaged, first electrode component 1 and second electrode component 2 may be connected for the first heat-conducting part 511, cause safety wind
Danger.Therefore, insulating trip 52 further includes Part III 523, and Part III 523 is fixed on the electric close to second of the first heat-conducting part 511
The surface of pole component 2.Part III 523 can separate first electrode component 1 and the insulation of second electrode component 2, avoid short circuit.
In addition, when the diaphragm breakage of first electrode component 1, being led if the second heat-conducting part 512 is directly contacted with bottom wall 31
First electrode component 1 and bottom wall 31 may be connected for backing 51, cause short-circuit risks.It is therefore preferred that the insulation of the application
Piece 52 further includes Part IV 524, and Part IV 524 is connected to Part III 523 and is located at the second heat-conducting part 512 and bottom wall 31
Between.
Wherein, insulating trip 52 includes the first insulating trip and the second insulating trip, and the first insulating trip and the second insulating trip are only each other
It is vertical.First insulating trip includes first part 521 and second part 522, and the second insulating trip includes Part III 523 and Part IV
524。
The surface that thermally conductive sheet 51 can be formed in the second insulating trip by the modes such as being bonded, being coated with；Thermally conductive sheet 51 and second is absolutely
Embolium is formed simultaneously L-shaped structure by bending.
The material of insulating trip 52 can be high molecular material, such as PP, PE, PET etc..According to insulating requirements and cooling requirements,
Second insulating trip can select between 5 μm~100 μm.First insulating trip needs to support the multiple electrode assembly, therefore, first
Insulating trip usually requires have biggish thickness, for example, the thickness of the first insulating trip can be 0.1mm~1mm.
Thermally conductive sheet 51 is preferably artificial synthesized graphite, and the thermal coefficient of artificial synthesized graphite is higher than natural graphite.According to
The requirement of heat dissipation, the thickness of thermally conductive sheet 51 are generally higher than the thickness of the second insulating trip, and specifically, the thickness of thermally conductive sheet 51 is preferably big
In 25 μm.
Compared with the first heat-conducting part 511, the area of the second heat-conducting part 512 is smaller；If the second heat-conducting part 512 is led with first
The thickness in hot portion 511 is identical, then the second heat-conducting part 512 is unable to fully absorb the heat on the first heat-conducting part 511, causes to conduct heat
Efficiency is relatively low.Therefore, in order to improve the heat transfer efficiency between the first heat-conducting part 511 and the second heat-conducting part 512, the second heat-conducting part
512 thickness is typically larger than the first heat-conducting part 511.
The other embodiments of the radiating subassembly of the application 5 are illustrated below.To simplify the description, only main below to be situated between
The difference of the other embodiments that continue and first embodiment, the part not described are referred to first embodiment and are understood.
Referring to Fig. 5, compared with first embodiment, the thermally conductive sheet 51 of second embodiment further includes third heat-conducting part 513, third
Heat-conducting part 513 bends from one end of the separate cap assembly 4 of the first heat-conducting part 511 and extends to second electrode component 2 and bottom wall
Between 31.Relative to the first heat-conducting part 511, the second heat-conducting part 512 and third heat-conducting part 513 extend in the opposite direction.It is thermally conductive
Piece 51 is generally T-shaped.
By the way that third heat-conducting part 513 is arranged, the contact area between thermally conductive sheet 51 and bottom wall 31 can be increased, to improve
Radiating efficiency improves the performance of electrode assembly.
To avoid third heat-conducting part 513 that the anode pole piece 6 of second electrode component 2 and cathode pole piece 7 are connected, second part
522 are set between second electrode component 2 and third heat-conducting part 513.
Referring to Fig. 6, compared with first embodiment, the thermally conductive sheet 51 of 3rd embodiment further includes the 4th heat-conducting part 514, and the 4th
Heat-conducting part 514 is set to the side of the separate second electrode component 2 of first electrode component 1, and the 4th heat-conducting part 514 is connected to
One end far from the first heat-conducting part 511 of two heat-conducting parts 512.Thermally conductive sheet 51 is generally U-shaped.
4th heat-conducting part 514 is between third electrode assembly 9 and first electrode component 1.Third electrode assembly 9 and first
Heat between electrode assembly 1 can be transmitted to bottom wall 31 via the 4th heat-conducting part 514 and the second heat-conducting part 512, thus in time
Ground distributes heat to external environment, improves the performance of third electrode assembly 9.
Referring to Fig. 7, compared with first embodiment, the thermally conductive sheet 51 of fourth embodiment further includes third heat-conducting part the 513, the 4th
Heat-conducting part 514 and the 5th heat-conducting part 515.One end of third heat-conducting part 513 from the separate cap assembly 4 of the first heat-conducting part 511 is curved
It rolls over and extends between second electrode component 2 and bottom wall 31.4th heat-conducting part 514 be set to first electrode component 1 far from the
The side of two electrode assemblies 2, and the 4th heat-conducting part 514 is connected to one far from the first heat-conducting part 511 of the second heat-conducting part 512
End.5th heat-conducting part 515 is set to the side of the separate first electrode component 1 of second electrode component 2, and the 5th heat-conducting part 515
It is connected to one end far from the first heat-conducting part 511 of third heat-conducting part 513.The generally M shape of thermally conductive sheet 51.
5th heat-conducting part 515 is between second electrode component 2 and the 4th electrode assembly 10.Second electrode component 2 and
Heat between four electrode assemblies 10 can be transmitted to bottom wall 31 via the 5th heat-conducting part 515 and third heat-conducting part 513, thus and
When distribute heat to external environment, improve the performance of third electrode assembly 9.
Compared with three L-shaped thermally conductive sheets 51 of first embodiment, the thermally conductive sheet 51 of a M shape of the present embodiment can be same
When by the heat transfer between four electrode assemblies to bottom wall 31, to simplify the structure of radiating subassembly 5, reduce radiating subassembly 5
Assembly difficulty.
Referring to Fig. 8 and Fig. 9, compared with first embodiment, the insulating trip 52 of the 5th embodiment has different structures.
Thermally conductive sheet 51 further includes third heat-conducting part 513, the 4th heat-conducting part 514 and the 5th heat-conducting part 515.Third heat-conducting part
513 bend from one end of the separate cap assembly 4 of the first heat-conducting part 511 and extend between second electrode component 2 and bottom wall 31.
4th heat-conducting part 514 is set to the side of the separate second electrode component 2 of first electrode component 1, and the 4th heat-conducting part 514 connects
In one end far from the first heat-conducting part 511 of the second heat-conducting part 512.5th heat-conducting part 515 is set to the remote of second electrode component 2
Side from first electrode component 1, and the 5th heat-conducting part 515 is connected to separate first heat-conducting part 511 of third heat-conducting part 513
One end.The generally M shape of thermally conductive sheet 51.
Insulating trip 52 includes third insulating trip and the 4th insulating trip, and third insulating trip and the 4th insulating trip are separated from each other.The
Three insulating trips include first part 521, and the table of the close first electrode component 1 of the second heat-conducting part 512 is fixed in first part 521
Face, so that the second heat-conducting part 512 and first electrode component 1 be separated.4th insulating trip includes second part 522, second part
522 are fixed on the surface of the close second electrode component 2 of third heat-conducting part 513, by third heat-conducting part 513 and second electrode group
The insulation of part 2 separates.
4th insulating trip further includes Part III 523 and Part V 525, and Part III 523 is fixed on the first heat-conducting part
The surface of 511 close second electrode component 2, Part V 525 are fixed on the close second electrode component of the 5th heat-conducting part 515
2 surface.Part III 523 and Part V 525 are connected with the both ends of 522 through-thickness Y of second part respectively.4th absolutely
Embolium by second electrode component 2 with thermally conductive sheet 51 is completely insulated separates.
Third insulating trip further includes Part VI 526 and Part VII 527, and Part VI 526 is fixed on the 4th heat-conducting part
The surface of 514 close first electrode component 1, Part VII 527 are fixed on the close first electrode component of the first heat-conducting part 511
1 surface.Part VI 526 and Part VII 527 are connected with the both ends of 521 through-thickness Y of first part respectively.Third is exhausted
Embolium by first electrode component 1 with thermally conductive sheet 51 is completely insulated separates.
Thermally conductive sheet 51 is preferably made of graphene.Compared with artificial synthesized graphite, graphene has higher thermal coefficient.
The thermal coefficient of graphene can be 500W/mK~5000W/mK.
In embodiment, Part III 523, Part V 525, Part VI 526 and Part VII 527 only play insulation
Effect, therefore, four parts can have lesser thickness；For example, the thickness of four parts can be 5 μm~100 μm.
And first part 521 should play insulating effect, also fill the gap of first electrode component 1 Yu bottom wall 31, the first electricity of support
Pole component 1, so the thickness of first part 521 is preferably 50 μm~1000 μm.Similarly, the thickness of second part 522 is preferred
It is 50 μm~1000 μm.
In order to improve radiating efficiency, the thickness of thermally conductive sheet 5 can be further increased.Specifically, the first heat-conducting part the 511, the 4th
The thickness of heat-conducting part 514 and the 5th heat-conducting part 515 can be 5~200 μm, the thickness of the second heat-conducting part 512 and third heat-conducting part 513
It can be 5~500 μm.
Claims (10)
1. a kind of secondary cell, which is characterized in that including first electrode component (1), second electrode component (2), shell (3), top
Cap assemblies (4) and radiating subassembly (5)；
First electrode component (1) and second electrode component (2) through-thickness (Y) are arranged and are contained in shell (3)；
Cap assembly (4) is connected to shell (3)；
Shell (3) has bottom wall (31), and bottom wall (31) and cap assembly (4) are located at opposite two of first electrode component (1)
Side；
Radiating subassembly (5) includes thermally conductive sheet (51) and insulating trip (52)；
Thermally conductive sheet (51) includes the first heat-conducting part (511) and the second heat-conducting part (512)；First heat-conducting part (511) is set to first
Between electrode assembly (1) and second electrode component (2), separate top cover group of the second heat-conducting part (512) from the first heat-conducting part (511)
One end of part (4) bends and extends between first electrode component (1) and bottom wall (31)；
Insulating trip (52) includes first part (521), is set between the second heat-conducting part (512) and first electrode component (1).
2. secondary cell according to claim 1, which is characterized in that
Thermally conductive sheet (51) further includes third heat-conducting part (513), and third heat-conducting part (513) is from the separate top of the first heat-conducting part (511)
One end of cap assemblies (4) bends and extends between second electrode component (2) and bottom wall (31)；
Insulating trip (52) further includes second part (522), is set between second electrode component (2) and third heat-conducting part (513).
3. secondary cell according to claim 1 or 2, which is characterized in that thermally conductive sheet (51) further includes the 4th heat-conducting part
(514), the 4th heat-conducting part (514) is set to the side of the separate second electrode component (2) of first electrode component (1), and the 4th
Heat-conducting part (514) is connected to one end far from the first heat-conducting part (511) of the second heat-conducting part (512).
4. secondary cell according to claim 3, which is characterized in that thermally conductive sheet (51) further includes the 5th heat-conducting part (515),
5th heat-conducting part (515) is set to the side of the separate first electrode component (1) of second electrode component (2), and the 5th heat-conducting part
(515) it is connected to one end far from the first heat-conducting part (511) of third heat-conducting part (513).
5. secondary cell according to claim 2, which is characterized in that
First part (521) is connected to second part (522)；
Insulating trip (52) forms through-hole (H), and the first heat-conducting part (511) between first part (521) and second part (522)
Protrude into through-hole (H).
6. secondary cell according to claim 2, which is characterized in that first part (521) and second part (522) are mutual
Separation, and the surface of the second heat-conducting part (512) is fixed in first part (521), second part (522) is fixed on third heat-conducting part
(513) surface.
7. secondary cell according to claim 1, which is characterized in that
Insulating trip (52) further includes second part (522), and second part (522) is connected to first part (521) and is set to
Between two electrode assemblies (2) and bottom wall (31)；
Insulating trip (52) forms through-hole (H), and the first heat-conducting part (511) between first part (521) and second part (522)
Protrude into through-hole (H).
8. secondary cell according to claim 1, which is characterized in that insulating trip (52) further includes Part III (523), the
Three parts (523) are fixed on the surface of the close second electrode component (2) of the first heat-conducting part (511).
9. secondary cell according to claim 1, which is characterized in that the thickness of the second heat-conducting part (512), which is greater than first, leads
The thickness of hot portion (511).
10. secondary cell according to claim 1, which is characterized in that the material of thermally conductive sheet (51) is graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821967956.9U CN209104287U (en) | 2018-11-27 | 2018-11-27 | Secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821967956.9U CN209104287U (en) | 2018-11-27 | 2018-11-27 | Secondary cell |
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| CN209104287U true CN209104287U (en) | 2019-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224445A (en) * | 2021-04-02 | 2021-08-06 | 苏州领湃新能源科技有限公司 | Lithium ion battery and assembly method |
| WO2023015558A1 (en) * | 2021-08-13 | 2023-02-16 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and device for manufacturing battery cell |
-
2018
- 2018-11-27 CN CN201821967956.9U patent/CN209104287U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224445A (en) * | 2021-04-02 | 2021-08-06 | 苏州领湃新能源科技有限公司 | Lithium ion battery and assembly method |
| WO2023015558A1 (en) * | 2021-08-13 | 2023-02-16 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and device for manufacturing battery cell |
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