CN208580774U - Secondary cell top cover - Google Patents

Secondary cell top cover Download PDF

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Publication number
CN208580774U
CN208580774U CN201821270361.8U CN201821270361U CN208580774U CN 208580774 U CN208580774 U CN 208580774U CN 201821270361 U CN201821270361 U CN 201821270361U CN 208580774 U CN208580774 U CN 208580774U
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CN
China
Prior art keywords
coping plate
secondary cell
top cover
recess portion
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201821270361.8U
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Chinese (zh)
Inventor
邓平华
谭婷
权伟民
马威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Amperex Technology Ltd
Original Assignee
Dongguan Amperex Technology Ltd
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Application filed by Dongguan Amperex Technology Ltd filed Critical Dongguan Amperex Technology Ltd
Priority to CN201821270361.8U priority Critical patent/CN208580774U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model provides a kind of secondary cell top cover, for being sealed to the shell for accommodating battery core, comprising: coping plate;With the positive terminal and negative terminal for being set to coping plate, coping plate is equipped with mounting hole, and negative terminal wears and is insulated in mounting hole, and coping plate extends to the direction of shell and is formed with the first recess portion, positive terminal is welded in coping plate and covers the first recess portion, and the first recess portion is connect with the positive plate in battery core.This secondary cell top cover no longer needs to be sealed using other components such as sealing ring, upper insulating parts, and the mounting process of sealing is omitted, thus assembles simple;Positive terminal is directly welded in coping plate, larger with the contact area of coping plate, thus conveyance capacity is good;The first recess portion formed on coping plate means that there are gaps on coping plate, gap can make the connection of the connection of coping plate and positive terminal, coping plate and positive plate mutually isolated, interference mutual when welding is particular avoided, thus the assembling of secondary cell cap structure is stronger.

Description

Secondary cell top cover
Technical field
The utility model relates to energy storage instrument field more particularly to a kind of secondary cell top covers.
Background technique
The driving power of modern society, more and more electric tools and the new energy vehicles is towards high capacity, Gao An The direction of full property is developed, and battery is widely used in electric tool and the new energy vehicles with good characteristics such as its high capacity In.These batteries should also have good safety to can be only achieved the standard used and meet people other than with high capacity Demand.
General secondary cell, shell and top cover constitute the cavity for accommodating electrolyte and battery core, and shell and top cover Usually aluminium material, due to the presence of electrolyte, in battery in use, because galvanic effect can occur aluminum hull corrosion and shadow Ring the normal use of battery.Aluminum hull corrodes in order to prevent, and more at present is to be electrically connected coping plate with anode and mention The voltage of high aluminum hull is to prevent from corroding.Coping plate is electrically connected with two ways with anode, one is by being set in positive pole Positive Poles and top cover are attached by resistance or other conductive sheets on column, the second is top cover is integrated with Positive Poles. For another scheme, the sealing problem between coping plate and Positive Poles is not only considered when assembling cap assembly, is also wanted The sealing problem between resistance and coping plate and Positive Poles is taken into account, thus in order to meet the air-tightness requirement of cap assembly, it is right In the more demanding of assembly technology;For second scheme, coping plate is integrated with Positive Poles, coping plate should process Positive Poles meet be connected with the positive plate of battery core again, and Positive Poles should be processed again by being equivalent to coping plate in the same end The boss being connected with the positive plate of battery core is processed, this top cover processing technology difficulty is very big.
Thus, it is badly in need of providing assembly and processing problems of the new cap structure of one kind to solve aforementioned cap structure.
Utility model content
The purpose of this utility model is that providing a kind of secondary cell top cover in view of the deficiencies of the prior art, it is not necessarily to Cumbersome sealing technology thus assembles that simple and secondary cell cap structure assembling is strong, conveyance capacity is good.
In order to achieve the above object, the utility model provides a kind of secondary cell top cover, for the shell for accommodating battery core It being sealed, comprising: coping plate and the positive terminal and negative terminal for being set to the coping plate, the coping plate are equipped with mounting hole, The negative terminal wears and is insulated in the mounting hole, and the coping plate extends to the direction of the shell and is formed with the One recess portion, the positive terminal are welded in the coping plate and cover first recess portion, in first recess portion and the battery core Positive plate connection.
As an embodiment, the positive terminal is located at the top of the coping plate and is welded and fixed with the coping plate, just Pole is directly welded on coping plate, easy to operate without carrying out additional processing to coping plate.
As another embodiment, the coping plate has body part, and the body part extends shape to the direction of the shell At the first recess portion, first recess portion has the bending extended to form from the body part of the coping plate to the direction of the shell There is platform part can be convenient for the connection with the positive plate in battery core for portion and the platform part being connected with the bending section, the first recess portion, And the contact area of platform part can further improve greatly conveyance capacity, the connection of platform part and positive plate can by platform part with just The tab of pole piece using ultrasonic bonding or by conductive sheet as connect medium respectively with platform part, positive plate tab into Row ultrasonic bonding.Further, first thickness portion and second thickness portion that the body part has thickness different, described second Thickness extends along the direction of the shell and forms first recess portion, thus the thickness of the first recess portion and second thickness portion Thickness is equal, and the thickness in the first thickness portion forms step in connecting place greater than the thickness and the two in the second thickness portion, The positive terminal has weld part, and the weld part is fitted into and is welded in the step, and positive terminal passes through weld part and body part The step of formation is fitted into and is welded, connection type is firm, it is airtight seal, can prevent biggish weld seam occur in welding And influence its hermetic seal.
As an embodiment, the maximum distance of lower surface of the positive terminal upper surface to the platform part and the cathode Column is equal in unidirectional full-size, that is to say, that and the height dimension of two pole column structures of secondary cell top cover is identical, Secondary cell can be made compact-sized when being assembled into battery pack, it is can avoid and shake.
As an embodiment, there is the second recess portion, the opening of second recess portion is towards described first in the positive terminal Recess portion.There is the second recess portion in positive terminal, can reduce the weight in positive terminal, or even the weight of entire secondary cell top cover.
As an embodiment, the coping plate extends to the direction far from the shell and forms lug boss, the protrusion Portion is equipped with mounting hole, and the negative terminal wears and is insulated in the mounting hole.Further, the coping plate is to the shell Size that the direction of body extends and the coping plate also mean that the equal sized of the direction extension far from the shell, Coping plate extends equal sized to its two sides, thus can make the both ends uniform force of coping plate, and intensity keeps uniform.
As an embodiment, secondary cell top cover further includes upper insulating part, sealing ring and lower insulating part, the negative terminal packet Negative pole portion and cathode boss portion are included, the upper insulating part is exhausted by the top half in the negative pole portion and the lug boss The lower half portion in the negative pole portion and the lug boss are insulated and are sealed by edge and sealing, the sealing ring, described lower exhausted Edge part insulate the cathode boss portion and the coping plate, passes through the multi-sealed of upper insulating part, sealing ring and lower insulating part Secondary cell top cover can be improved in the hermetic seal of negative terminal one end.Further, the lower insulating part extends to the coping plate Lower section equipped with the positive terminal, and the lower insulating part is equipped with the first receiving hole, first recess portion is contained in described first Receiving hole, the first recess portion, which is contained in first receiving hole, can make compact-sized, avoid occupying excessive space.
The coping plate of the utility model extends to the direction of shell and is formed with the first recess portion, and positive terminal is welded in coping plate And cover the first recess portion, the first recess portion connect with the positive plate in battery core, thus no longer need to use sealing ring, upper insulating part etc. its He is partially sealed, and the mounting process of sealing is omitted, thus assembles simple;Positive terminal is directly welded in coping plate, with The contact area of coping plate is larger, thus conveyance capacity is good;The first recess portion formed on coping plate means exist on coping plate Gap, gap can make the connection of the connection of coping plate and positive terminal, coping plate and positive plate mutually isolated, particular avoid welding Mutual interference when connecing, thus the assembling of secondary cell cap structure is stronger.
Detailed description of the invention
Fig. 1 is the cross-sectional view using the secondary cell of the secondary cell top cover of the utility model.
Fig. 2 is the perspective view of the utility model secondary cell top cover.
Fig. 3 is the explosive view of the utility model secondary cell top cover.
Fig. 4 is cross-sectional view of the Fig. 2 along the direction A-A.
Fig. 5 is a variation diagram of Fig. 4.
Fig. 6 is another variation diagram of Fig. 4.
Specific embodiment
Illustrate the secondary cell top cover of the utility model with reference to the accompanying drawing.
It should be noted that usually secondary cell is vertical placement, the top cover of secondary cell is in the side with housing seal For lower section, the other side is top, and the thickness of top cover refers to the size along upper and lower direction.
The secondary cell top cover of the utility model can be used for seal casinghousing and prepare secondary cell, as shown in Figure 1, secondary electricity Pond 100 includes secondary cell top cover 1, battery core 2 and the shell 3 for accommodating battery core, and the secondary cell of infiltration battery core 2 is marked in shell 3 Electrolyte (not shown), secondary cell top cover 1 can be welded with shell 3 and be sealed.
Referring to Fig. 2~3, secondary cell top cover 1 includes coping plate 11, and 12 He of positive terminal being arranged on coping plate 11 Negative terminal 13, coping plate 11 are equipped with explosion-proof valve opening 114 and liquid injection hole 115, and explosion-proof valve opening 114 is equipped with explosion-proof valve 14, explosion-proof valve 14 Top be equipped with explosion-proof valve screening glass 15.
Referring to Fig. 2~6, negative terminal 13 includes negative pole portion 131 and cathode boss portion 132, and coping plate 11 is to far from shell The direction (i.e. up) of body 3 extends and forms lug boss 113, and lug boss 113 is equipped with mounting hole 1131, negative terminal 13, accurately Saying is, negative pole portion 131 wears and is insulated in mounting hole 1131, specifically, upper insulating part 16 is by negative pole portion 131 Top half and lug boss 113 insulate and seal, sealing ring 17 is by the lower half portion in negative pole portion 131 and lug boss 112 It insulate and seals, lower insulating part 18 insulate cathode boss portion 132 and coping plate 11, passes through upper insulating part 16,17 and of sealing ring The multi-sealed secondary cell top cover that can be improved of lower insulating part 18 is in the hermetic seal of cathode styletable, moreover, lower insulating part 18 is equipped with The first through hole 181 worn for negative pole portion 131.
Referring further to Figure 2~6, coping plate 11 extends to the direction (i.e. down) of shell 3 and is formed with the first recess portion 112, positive terminal 12 is welded in coping plate 11 and covers the first recess portion 112, and the first recess portion 112 is with the positive plate in battery core 2 (in figure It is not shown) connection.
As the embodiment that coping plate 11 is connect with positive terminal 12, as shown in Figures 4 and 5, coping plate 11 has body part 111, body part 111 extends to form the first recess portion 112 to the direction (i.e. down) of shell 3, and the first recess portion 112 has by coping plate The bending section 1121 and be connected with bending section 1121 flat that 11 body part 111 is extended to form to the direction (i.e. down) of shell 3 There is platform part 1122 can be convenient for the connection with the positive plate in battery core 2, and platform part 1122 for platform portion 1122, the first recess portion 112 Contact area can further improve conveyance capacity greatly.Further, the first thickness portion that body part 111 has thickness different 1111 and second thickness portion 1112, second thickness portion 1112 extends along the direction of shell 3 and forms the first recess portion 112, and first is thick The thickness in degree portion 1111 is greater than the thickness in second thickness portion 1112 and the two is in connecting place formation step (not shown), anode Column 12 has weld part 121, and weld part 121 is chimeric and is welded in step, and positive terminal 12 passes through weld part 121 and body part 111 The step of formation is fitted into and is welded, connection structure is firm, it is airtight seal, can prevent biggish weld seam occur in welding And influence the air-tightness of secondary cell top cover.As shown in figure 5, there is the second recess portion 122 in positive terminal 12, the second recess portion 122 For opening towards the first recess portion 112, the setting of the second recess portion 122 can reduce weight or even entire secondary cell in positive terminal 12 The weight of top cover 1.
As another embodiment that coping plate 11 is connect with positive terminal 12, as shown in fig. 6, positive terminal 12 is located at coping plate 11 Top and be welded and fixed with coping plate 11, positive terminal 12 is directly welded on coping plate 11, without to coping plate 11 carry out volume Outer processing, it is easy to operate.
Supplementary explanation, as shown in figures 4-6, the maximum of the upper surface of positive terminal 12 to the lower surface of platform part 1122 Distance is equal in unidirectional full-size with negative terminal 13, if the upper surface of positive terminal 12 is whole plane, anode The distance of the upper surface of column 12 to the lower surface of platform part 1122 is equal with the maximum height of negative terminal 13;If positive terminal 12 is upper Surface be it is step-like or non-planar, then the distance between the lower surface on the vertex of positive terminal 12 to 1122 with negative terminal 13 most Big height is equal, and the height dimension of two pole column structures of secondary cell top cover is identical, and secondary cell can be made to be assembled into battery It is compact-sized when group, it can avoid it and shake.The size that coping plate 11 extends to the direction of shell 3 and coping plate 112 are to remote The direction of shrinking away from theshell body 3 extends equal sized, also means that, the first recess portion 112 is with lug boss 113 along upper and lower direction It is equal sized, thus the both ends uniform force of coping plate can be made, and intensity keeps uniform.Lower insulating part 18 extends to coping plate 11 Lower section equipped with positive terminal 12, and lower insulating part 18 is equipped with the first receiving hole 182, the first recess portion 112 is contained in the first receiving hole 182, the first recess portion 112, which is contained in the first receiving hole 182, can make compact-sized, avoid occupying excessive space.
It should be pointed out that the above specific embodiment is merely to illustrate the utility model rather than limits the utility model Range, after having read the utility model, those skilled in the art are equal to the modification of the various equivalent forms of the utility model Fall into the application range defined in the appended claims.

Claims (10)

1. a kind of secondary cell top cover, for being sealed to the shell for accommodating battery core, comprising: coping plate and be set to the top The positive terminal and negative terminal of cover plate, the coping plate are equipped with mounting hole, and the negative terminal wears and is insulated in the installation Hole, which is characterized in that the coping plate extends to the direction of the shell and is formed with the first recess portion, and the positive terminal is welded in The coping plate simultaneously covers first recess portion, and first recess portion is connect with the positive plate in the battery core.
2. secondary cell top cover according to claim 1, which is characterized in that the positive terminal is located at the upper of the coping plate It portion and is welded and fixed with the coping plate.
3. secondary cell top cover according to claim 1, which is characterized in that the coping plate have body part, described Body portion extends to form the first recess portion to the direction of the shell, and first recess portion has from the body part of the coping plate to institute State the direction bending section extended to form of shell and the platform part being connected with the bending section.
4. secondary cell top cover according to claim 3, which is characterized in that the body part has different first of thickness Thickness and second thickness portion, the second thickness portion extends along the direction of the shell and forms first recess portion, described The thickness in first thickness portion is greater than the thickness in the second thickness portion and the two is in connecting place formation step, and the positive terminal has Weld part, the weld part are fitted into and are welded in the step.
5. secondary cell top cover according to claim 3, which is characterized in that the positive terminal upper surface to the platform part Lower surface maximum distance it is equal in unidirectional full-size with the negative terminal.
6. secondary cell top cover according to claim 1, which is characterized in that have the second recess portion, institute in the positive terminal The opening of the second recess portion is stated towards first recess portion.
7. secondary cell top cover according to claim 1, which is characterized in that the coping plate to far from the shell side Lug boss is formed to extension, the lug boss is equipped with mounting hole, and the negative terminal wears and is insulated in the mounting hole.
8. secondary cell top cover according to claim 7, which is characterized in that the coping plate prolongs to the direction of the shell The size stretched extends with the coping plate to the direction far from the shell equal sized.
9. secondary cell top cover according to claim 7, which is characterized in that further include upper insulating part, sealing ring and it is lower absolutely Edge part, the negative terminal include negative pole portion and cathode boss portion, and the upper insulating part is by the upper half in the negative pole portion Part is insulated and is sealed with the lug boss, and the sealing ring is exhausted by the lower half portion in the negative pole portion and the lug boss Edge and sealing, the lower insulating part insulate the cathode boss portion and the coping plate.
10. secondary cell top cover according to claim 9, which is characterized in that the lower insulating part extends to the top cover Piece is equipped with the lower section of the positive terminal, and the lower insulating part is equipped with the first receiving hole, and first recess portion is contained in described the One receiving hole.
CN201821270361.8U 2018-08-07 2018-08-07 Secondary cell top cover Active CN208580774U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821270361.8U CN208580774U (en) 2018-08-07 2018-08-07 Secondary cell top cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821270361.8U CN208580774U (en) 2018-08-07 2018-08-07 Secondary cell top cover

Publications (1)

Publication Number Publication Date
CN208580774U true CN208580774U (en) 2019-03-05

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CN201821270361.8U Active CN208580774U (en) 2018-08-07 2018-08-07 Secondary cell top cover

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112234282A (en) * 2020-10-10 2021-01-15 深圳市合壹新能技术有限公司 Battery shell assembly, battery and preparation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112234282A (en) * 2020-10-10 2021-01-15 深圳市合壹新能技术有限公司 Battery shell assembly, battery and preparation method

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Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Jiangxi Bestley New Energy Technology Co., Ltd.

Assignor: Dongguan Amperex Technology Limited

Contract record no.: 2019440020019

Denomination of utility model: Secondary cell top cover and secondary cell

Granted publication date: 20190305

License type: Common License

Record date: 20190415

EE01 Entry into force of recordation of patent licensing contract