CN209401728U - Secondary cell and its afflux component - Google Patents
Secondary cell and its afflux component Download PDFInfo
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- CN209401728U CN209401728U CN201920085034.3U CN201920085034U CN209401728U CN 209401728 U CN209401728 U CN 209401728U CN 201920085034 U CN201920085034 U CN 201920085034U CN 209401728 U CN209401728 U CN 209401728U
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- substrate
- component
- afflux
- support plate
- radiating
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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 and its afflux component.Secondary cell includes shell, electrode assembly, cap assembly and the afflux component.Shell accommodates electrode assembly.Cap assembly includes lamina tecti and the electrode terminal for being set to lamina tecti, and lamina tecti is connected to shell.Afflux component includes afflux component and radiating component, afflux component connection electrode component and electrode terminal.Afflux component includes substrate, bending plate and support plate, and substrate extends along perpendicular to lateral direction, and bending plate extends from the one end of substrate along longitudinal direction and bends relative to substrate, and support plate extends from one end of the separate substrate of bending plate.Support plate is electrically connected with the electrode assembly of secondary cell.Radiating component is connected to substrate, and radiating component and support plate are located at the same side of substrate transversely.Horizontally, surface of surface of the radiating component far from substrate than support plate far from substrate is closer to substrate.
Description
Technical field
The utility model relates to field of batteries more particularly to a kind of secondary cells and its afflux component.
Background technique
Secondary cell generally includes electrode assembly, shell, electrode terminal and afflux component, and afflux component is for being electrically connected electricity
Pole component and electrode terminal.However, afflux component can be produced because of accumulation of heat when the charge or discharge that secondary cell is repeated
Raw temperature rise, at high operating temperatures, afflux component is easy to produce deformation；When secondary cell vibration, afflux component is easily damaged.
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 cell and its affluxs
Component can reduce the temperature of afflux component, improve space utilization rate.
To achieve the goals above, the utility model provides a kind of secondary cell and its afflux component.
Afflux component includes afflux component and radiating component.Afflux component includes substrate, bending plate and support plate, substrate edge
Extend perpendicular to lateral direction, bending plate extends from the one end of substrate along longitudinal direction and bends relative to substrate, and support plate is from curved
One end of the separate substrate of folded plate extends.Support plate is set as being electrically connected with the electrode assembly of secondary cell.Radiating component connection
In substrate, and radiating component and support plate are located at the same side of substrate transversely.Horizontally, table of the radiating component far from substrate
Surface of the face than support plate far from substrate is closer to substrate.
Radiating component, substrate and support plate are laminated structure, and the sum of the thickness of radiating component and substrate thickness are greater than
The thickness of support plate.
Afflux component further includes terminal connecting plate, is extended from substrate along one end of short transverse and perpendicular to substrate.Heat dissipation
Component is arranged close to the junction of terminal connecting plate and substrate.
Radiating component is welded in or is riveted on substrate.Preferably, substrate, radiating component and support plate are integrally formed.
In the height direction, radiating component is between terminal connecting plate and support plate.
Terminal connecting plate extends along the direction far from radiating component.
Support plate is two, and two support plates extend towards close to mutual direction.Preferably, between two support plates there are
Gap.
Secondary cell includes shell, electrode assembly, cap assembly and the afflux component.Shell accommodates electrode group
Part.Cap assembly includes lamina tecti and the electrode terminal for being set to lamina tecti, and lamina tecti is connected to shell.The connection of afflux component
Electrode assembly and electrode terminal.
The beneficial effects of the utility model are as follows: in this application, by the way that radiating component is arranged, can increase dissipating for substrate
Heat area improves radiating efficiency, excess calories is avoided to accumulate.Meanwhile flow channels can be formed between radiating component and substrate,
To shunt to the electric current on substrate, quantity of heat production is reduced, reduces the temperature of afflux component.In addition, radiating component is in transverse direction
On will not be additional occupied space improve the energy density of secondary cell to increase the space utilization rate of secondary cell.
Detailed description of the invention
Fig. 1 is the schematic diagram according to the secondary cell of the utility model.
Fig. 2 is according to the afflux component of the utility model and the schematic diagram of cap assembly.
Fig. 3 is the schematic diagram according to the first embodiment of the afflux component of the utility model.
Fig. 4 is the schematic diagram of the afflux component of Fig. 3 before the forming.
Fig. 5 is the schematic diagram according to the afflux component of the second embodiment of the utility model before the forming.
Fig. 6 is the cross-sectional view of the afflux component of Fig. 5.
Fig. 7 is the schematic diagram according to the afflux component of the 3rd embodiment of the utility model before the forming.
Wherein, the reference numerals are as follows:
1 afflux component, 3 shell
11 afflux component, 4 cap assembly
111 substrate, 41 lamina tecti
112 bending plate, 42 electrode terminal
113 support plate X are lateral
114 terminal connecting plate Y are longitudinal
12 radiating component Z height directions
2 electrode assemblies
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 explanation, term " connection " shall be understood in a broad sense, for example, " connection " may be a fixed connection, be also possible to
It is detachably connected, or is integrally connected, or electrical connection or signal connection；" connection " can be directly connected, can also be in
Between medium be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in 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.Below by specific reality
It applies example and the application is described in further detail in conjunction with attached drawing.
The secondary cell of the application can be lithium ion battery.
Referring to Fig.1, the secondary cell of the application includes afflux component 1, electrode assembly 2, shell 3 and cap assembly 4.
Electrode assembly 2 includes anode pole piece, cathode pole piece and diaphragm, and diaphragm separates anode pole piece and cathode pole piece.Electricity
Pole component 2 is formed and being helically wrapped anode pole piece, cathode pole piece and diaphragm, and presses to form flat knot by pressure
Structure.Electrode assembly 2 is the core component that secondary cell realizes charging/discharging function.
Anode pole piece includes positive coating area and the uncoated area of anode, wherein positive coating area is coated with LiMn2O4, phosphoric acid
Iron lithium isoreactivity material.Cathode pole piece includes cathode coating area and the uncoated area of cathode, and wherein cathode coating area is coated with graphite
Or silicon isoreactivity material.
Shell 3 can have hexahedral shape or other shapes.Accommodating chamber is formed inside shell 3, with 2 He of accommodate electrod component
Electrolyte.Shell 3 forms opening at one end, and electrode assembly 2 can be placed into the accommodating chamber of shell 3 via described be open.Shell 3
It can be made of the material of conductive metal, it is preferable that shell 2 is made of aluminum or aluminum alloy.
Cap assembly 4 includes that lamina tecti 41 and the electrode terminal 42 for being set to lamina tecti 41, lamina tecti 41 are set to shell
Body 3 and the opening for covering shell 3, so that electrode assembly 2 is sealed in shell 3.Lamina tecti 41 can be connected by modes such as welding
It is connected to shell 3.Electrode terminal 42 and afflux component 1 are two, and an electrode terminal 42 is via an afflux component 1 and anode
Pole piece electrical connection, another electrode terminal 42 are electrically connected via another afflux component 1 with cathode pole piece.
The afflux component 1 of the application is described in detail with different embodiments below.
In the first embodiment, referring to Fig. 2 and Fig. 3, afflux component 1 includes afflux component 11, and afflux component 11 connects electricity
Pole component 2 and electrode terminal 42.
Afflux component 11 includes substrate 111, bending plate 112 and support plate 113.Substrate 111 is along the direction perpendicular to lateral X
Extend, and substrate 111 is set to the side of the transversely X of electrode assembly 2.Bending plate 112 prolongs from one end of the Y along longitudinal direction of substrate 111
It stretches, and bending plate 112 is bent relative to substrate 111 towards the direction far from electrode assembly 2.Support plate 113 is remote from bending plate 112
One end from substrate 111 extends.
The uncoated area of anode of anode pole piece can be fixed to the support plate of an afflux component 11 by ultrasonic bonding
113, the uncoated area of the cathode of cathode pole piece can be fixed to the support plate 113 of another afflux component 11 by ultrasonic bonding.
Referring to Fig. 4, before assembly electrode component 2 and afflux component 11, support plate 113 is generally perpendicular to substrate 111, in this way
Convenient for welding electrode assembly 2 and support plate 113.Support plate 113 can be bent when the welding is completed referring to Fig. 2, so that support
Plate 113 is in substantially parallel relationship to substrate 111, to reduce the space occupied on lateral X of afflux component 11.
In order to improve the capacity of secondary cell, electrode assembly 2 is usually arranged as multiple.The multiple electrode assembly may include
First electrode component and second electrode component.For the ease of connection first electrode component and second electrode component, 112 He of bending plate
Support plate 113 is disposed as two.Two bending plates 112 respectively from substrate 111 along longitudinal direction Y both ends extend, each support plate 113
It is connected respectively with a corresponding bending plate 112.One support plate 113 is connected to first electrode component, another support plate 113
It is connected to second electrode component.
Preferably, two support plates 113 extend towards close to mutual direction.Support plate 113 and substrate 111 are on longitudinal Y
The space occupied overlapping, to reduce the space occupied on longitudinal Y of afflux component 11.Further, two support plates 113 it
Between there are gaps.When bending support plate 113, the gap can overlap to avoid described two support plates 113.
In the charge and discharge process of secondary cell, the electric current of electrode assembly 2 can flow to electrode tip via afflux component 11
Son 42, and afflux component 11 can the heat production when electric current passes through.If accumulation of heat is excessive, afflux component 11 is easy because temperature is excessively high
And it deforms.
In order to reduce the heat production of afflux component 11, the temperature of afflux component 11 is reduced, the application is preferably in afflux component 11
Upper setting radiating component 12.
Specifically, radiating component 12 is set to the side of the separate electrode assembly 2 of substrate 111, that is to say, that radiating component
12 and support plate 113 be located at the same side of the transversely X of substrate 111.Radiating component 12 can be with the separate electrode assembly 2 of substrate 111
Outer surface be bonded and be connected to substrate 111.
In this application, by setting radiating component 12, the heat dissipation area of substrate 111 can be increased, improve radiating efficiency,
Excess calories are avoided to accumulate.Meanwhile flow channels can be formed between radiating component 12 and substrate 111, thus on substrate 111
Electric current shunted, reduce quantity of heat production, reduce afflux component 11 temperature.
Thermal capacitance is heat needed for the temperature of predetermined material is increased by 1 DEG C, and the size of thermal capacitance is proportional to quality.And this Shen
Please by the way that radiating component 12 is arranged, the whole thermal capacitance of afflux component 1 can be increased, to reduce temperature rise.
Referring to Fig. 2 and Fig. 3, on lateral X, compared with support plate 113 is far from the surface of substrate 111, radiating component 12 is remote
Surface from substrate 111 is closer to substrate 111.In other words, along the direction far from substrate 111, the surface of support plate 113 exceeds
The surface of radiating component 12.
On lateral X, 12 the space occupied of radiating component is Chong Die with 113 the space occupied of support plate；In other words, at this
In application, the occupied space that radiating component 12 will not be additional on lateral X mentions to increase the space utilization rate of secondary cell
The energy density of high secondary cell.
Radiating component 12, substrate 111 and support plate 113 are laminated structure.Specifically, radiating component 12 and support plate
113 can be the metal plate for being parallel to substrate 111.The thickness of radiating component 12 is bigger, and heat-sinking capability and separation capacity are stronger,
Also the temperature rise of afflux component 11 can more be reduced.In addition, should also be avoided radiating component 12 when increasing the thickness of radiating component 12
The additional occupied space on lateral X.Under the premise of guaranteeing 12 not additional occupied space of radiating component, support plate 113 can be made
Surface far from substrate 111 is flushed with radiating component 12 far from the surface of substrate 111, and then makes the heat-sinking capability of radiating component 12
It is maximized with separation capacity.
In this application, the electric current of first electrode component flows into substrate 111, second electrode group via a support plate 113
The electric current of part flows into substrate 111 via another support plate 113, that is to say, that the electric current on substrate 111 is two support plates
The sum of electric current on 113.Since the electric current on substrate 111 is bigger than normal, so more heats can be generated.It is therefore preferred that heat dissipation
The sum of thickness and 111 thickness of substrate of component 12 are greater than the thickness of support plate 113, and excess calories heap can be effectively avoided in this way
Product reduces the temperature rise on substrate 111.
Afflux component 11 is integrally formed.For example, afflux component 11 can pass through the techniques shapes such as bending by the metal plate of equal thickness
At.The thickness of substrate 111 is equal to the thickness of support plate 113.
Afflux component 11 further includes terminal connecting plate 114, from substrate 111 along short transverse Z one end extend and perpendicular to
Substrate 111.It supplements herein, the certain error of " vertical " permission, specifically, substrate 111 and terminal connecting plate 114
Angle can be 80 °~100 °.Terminal connecting plate 114 can be fixed on electrode terminal 42 by laser welding.Substrate 111 can be from terminal
One end of the transversely X of connecting plate 114 is bent downward.
In the junction of terminal connecting plate 114 and substrate 111, the flow direction of electric current changes, and the junction is caused to produce
Heat is the most serious.Preferably, radiating component 12 is arranged close to the junction of terminal connecting plate 114 and substrate 111；Radiating component 12
Excess calories can be avoided to accumulate with the heat of the junction of quick release terminal connecting plate 114 and substrate 111, reduce temperature rise, prevented
Only afflux component 11 deforms.
In the present embodiment, radiating component 12 is independent metal plate, and is fixed on substrate 111 by laser welding.Base
Electric current on plate 111 can flow into radiating component 12 via weld, to realize the shunting function of radiating component 12.Meanwhile it removing
Outside weld, there are small gaps between substrate 111 and radiating component 12, and heat can distribute outward via gap, to mention
High cooling efficiency.
On short transverse Z, radiating component 12 is between terminal connecting plate 114 and support plate 113.It can prevent in this way
Radiating component 12 is inserted between support plate 113 and substrate 111, avoids the spacing for increasing support plate 113 and substrate 111, thus
Reduce the space occupied on lateral X of afflux component 11.
Terminal connecting plate 114 extends along the direction far from radiating component 12, and extends to the top of electrode assembly 2.Heat dissipation
Component 12 is set to side of the substrate 111 far from electrode assembly 2, and terminal connecting plate 114 is set to substrate 111 close to electrode assembly
2 side.
Preferably, on lateral X, there are gaps between substrate 111 and support plate 113.The gap helps to radiate, and keeps away
Exempt from heat to be gathered between substrate 111 and support plate 113.
The other embodiments of the afflux component 1 of the application 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 figure 5 and figure 6, in a second embodiment, radiating component 12 is riveted on substrate 111.Electric current on substrate 111 can
Via the location transmission of riveting to radiating component 12.Specifically, substrate 111 can be by being stamped and formed out multiple protrusions, radiating component
12 are provided with multiple through-holes, in the through-hole of the protrusion insertion radiating component 12 of substrate 111, and by squeezing, by protrusion and heat dissipation
Component 12 is riveted together.
Referring to Fig. 7, in the third embodiment, substrate 111, radiating component 12 and support plate 113 are integrally formed.Specifically
Ground, radiating component 12 can from substrate 111 along longitudinal direction Y one end extend, and be folded into substrate 111 separate electrode assembly 2 one
Side.Meanwhile radiating component 12 is also welded in substrate 111.Electric current can be transferred to radiating component 12 by weld, so as to improve dissipating
The diverter function of hot component 12.Compared with first embodiment, 3rd embodiment can simplify the moulding process of afflux component 1.
Claims (10)
1. a kind of afflux component (1) of secondary cell, including afflux component (11) and radiating component (12)；
Afflux component (11) includes substrate (111), bending plate (112) and support plate (113), and substrate (111) is along perpendicular to transverse direction
(X) direction extends, and bending plate (112) extends from one end of substrate (111) (Y) along longitudinal direction and bends relative to substrate (111),
Support plate (113) extends from one end of the separate substrate (111) of bending plate (112)；
Support plate (113) is set as being electrically connected with the electrode assembly of secondary cell (2)；
Radiating component (12) is connected to substrate (111), and radiating component (12) and support plate (113) are located at substrate (111) along cross
To the same side of (X)；
On transverse direction (X), table of surface of the radiating component (12) far from substrate (111) than support plate (113) far from substrate (111)
Face is closer to substrate (111).
2. afflux component (1) according to claim 1, which is characterized in that radiating component (12), substrate (111) and support
Plate (113) is laminated structure, and the sum of the thickness of radiating component (12) and substrate (111) thickness are greater than support plate (113)
Thickness.
3. afflux component (1) according to claim 1, which is characterized in that
Afflux component (11) further includes terminal connecting plate (114), extends and hangs down from substrate (111) along one end of short transverse (Z)
Directly in substrate (111)；
Radiating component (12) is close to terminal connecting plate (114) and the setting of the junction of substrate (111).
4. afflux component (1) according to claim 3, which is characterized in that radiating component (12) is welded in or is riveted on base
Plate (111).
5. afflux component (1) according to claim 4, which is characterized in that substrate (111), radiating component (12) and branch
Fagging (113) is integrally formed.
6. afflux component (1) according to claim 3, which is characterized in that on short transverse (Z), radiating component (12)
Between terminal connecting plate (114) and support plate (113).
7. afflux component (1) according to claim 3, which is characterized in that terminal connecting plate (114) is along far from radiating component
(12) direction extends.
8. afflux component (1) according to claim 1, which is characterized in that support plate (113) is two, two support plates
(113) extend towards close to mutual direction.
9. afflux component (1) according to claim 8, which is characterized in that there are gaps between two support plates (113).
10. any in a kind of secondary cell, including shell (3), electrode assembly (2), cap assembly (4) and claim 1-9
Afflux component (1) described in；
Shell (3) accommodates electrode assembly (2)；
Cap assembly (4) includes lamina tecti (41) and the electrode terminal (42) for being set to lamina tecti (41), and lamina tecti (41) is even
It is connected to shell (3)；
Afflux component (11) connection electrode component (2) and electrode terminal (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920085034.3U CN209401728U (en) | 2019-01-18 | 2019-01-18 | Secondary cell and its afflux component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920085034.3U CN209401728U (en) | 2019-01-18 | 2019-01-18 | Secondary cell and its afflux component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209401728U true CN209401728U (en) | 2019-09-17 |
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ID=67898568
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920085034.3U Active CN209401728U (en) | 2019-01-18 | 2019-01-18 | Secondary cell and its afflux component |
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| CN (1) | CN209401728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021000781A1 (en) * | 2019-07-01 | 2021-01-07 | 宁德时代新能源科技股份有限公司 | Secondary battery |
-
2019
- 2019-01-18 CN CN201920085034.3U patent/CN209401728U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021000781A1 (en) * | 2019-07-01 | 2021-01-07 | 宁德时代新能源科技股份有限公司 | Secondary battery |
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