CN207233789U - Secondary cell and battery modules - Google Patents
Secondary cell and battery modules Download PDFInfo
- Publication number
- CN207233789U CN207233789U CN201721102068.6U CN201721102068U CN207233789U CN 207233789 U CN207233789 U CN 207233789U CN 201721102068 U CN201721102068 U CN 201721102068U CN 207233789 U CN207233789 U CN 207233789U
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- lamina tecti
- terminal
- secondary cell
- electrode
- main part
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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
Abstract
The utility model provides a kind of secondary cell and battery modules.Secondary cell includes：Housing, has opening；Electrode assemblie, including the first pole piece, the second pole piece and partition plate；Cap assembly, including lamina tecti and first electrode terminal, lamina tecti covering are open and have electrode fairlead, and first electrode terminal includes terminal board；Lower insulating member, positioned at the side of the remote terminal board of lamina tecti；And terminal plate, terminal plate include main part and extension：Main part, it is connected positioned at the side of the remote lamina tecti of lower insulating member and with the first pole piece, extension is stretched into electrode fairlead and is connected with first electrode terminal, and the first pole piece is electrically connected to first electrode terminal by terminal plate, also, first electrode terminal is without departing from the lower surface of lower insulating member.It can realize the space availability ratio for improving secondary cell enclosure interior, lift the energy density of secondary cell, simplify the structure of electrode terminal, lift one or more of processing efficiency of secondary cell purpose.
Description
Technical field
It the utility model is related to energy storage device technical field, more particularly to secondary cell and battery modules.
Background technology
New-energy automobile is at home or even the world is all being widely popularized, but wants complete replacing fuel oil automobile, also has very much
Need improvements.The problems such as example, distance travelled of automobile is few, battery pack is of high cost, the reliability of battery pack also need into
One step solves.Based on it is above-mentioned the problem of, the requirement of higher is proposed to the core part power battery of electric car, such as need to move
Power battery reaches the energy density of higher, lower cost etc..
At present, power battery generally includes housing and cap assembly using square monocoque, power battery case,
Power battery case provides closed a space electrode assemblie and electrolyte, and the electric energy of electrode assemblie passes through cap assembly
Pole be drawn out to out of confined space outside confined space.In existing cap assembly, lamina tecti is metallic plate and opens up logical
Hole, pole is divided into matrix part and extension, and the cross-sectional area of matrix part is more than the aperture of through hole.During assembling, matrix position
It is securing elongated using clamp spring or using riveting method after extension passes through through hole in the lower section of lamina tecti (i.e. enclosure interior)
Portion, is fixed on lamina tecti by this mode by pole.Since matrix part is located at enclosure interior, the space of enclosure interior can be made
Utilization rate reduces, so as to reduce the energy density of power battery.Furthermore since pole needs to set matrix part and longer extension
Portion, thus pole can not directly punch forming and need single machining so that the increase of the manufacture cost of pole.
In addition, pole in order to be connected with the terminal plate inside battery container, will can be set positioned at the matrix part of enclosure interior
Certain thickness, is usually 1.5~4mm, therefore can reduce the space availability ratio inside battery container, and adds and be manufactured into
This.
Therefore, there is an urgent need for a kind of new secondary cell and battery modules.
Utility model content
Embodiment according to the present utility model, there is provided a kind of secondary cell and battery modules, can realize raising two
The space availability ratio of primary cell enclosure interior, so as to lift the energy density of secondary cell, simplifies the structure of electrode terminal, lifting
One or more of processing efficiency of secondary cell purpose.
According to the one side of the utility model embodiment, there is provided a kind of secondary cell, including：Housing, has opening；
Electrode assemblie, accommodates in the housing, including the first pole piece, the second pole piece and is arranged between the first pole piece and the second pole piece
Partition plate；Cap assembly, including lamina tecti and first electrode terminal, lamina tecti covering are open and have electrode fairlead, and first is electric
Extreme attached bag includes terminal board, and terminal board is located at the side of lamina tecti and covering electrode fairlead；Lower insulating member, positioned at lamina tecti
Remote terminal board side；And terminal plate, terminal plate include main part and the extension being connected with main part, main body section
It is connected in the side of the remote lamina tecti of lower insulating member and with the first pole piece, extension stretches into electrode fairlead and with first
Electrode terminal connects, and the first pole piece is electrically connected to first electrode terminal by terminal plate, also, along lamina tecti to lower insulating member
Direction, surface of the first electrode terminal without departing from the remote lamina tecti side of lower insulating member.
According to the one side of the utility model embodiment, main part is in the form of sheets and parallel with lamina tecti, and extension includes
The protrusion of the close lamina tecti side of main part is arranged on, protrusion is connected with first electrode terminal.
According to the one side of the utility model embodiment, main part is an integral structure with extension, and passes through shape
The side of remote lamina tecti into protrusion in main part forms recess.
According to the one side of the utility model embodiment, protrusion includes roof and the annular sidewall being connected with roof, with
Recess is set to be opened wide in the remote lamina tecti side of main part.
According to the one side of the utility model embodiment, protrusion includes roof and is connected with roof and relative to each other two
A side wall, so that recess is in the side of the remote lamina tecti of main part and adjacent with the side of the remote lamina tecti of main part
Both sides are opened wide respectively.
According to the one side of the utility model embodiment, protrusion includes roof and a side wall being connected with roof, with
Recess is set to distinguish in the side of the remote lamina tecti of main part and three sides adjacent with the side of the remote lamina tecti of main part
Open wide.
According to the one side of the utility model embodiment, main part includes substrate and the wing extended by the edge of substrate
Plate, substrate are connected with the first pole piece, and extension is arranged on wing plate.
According to the one side of the utility model embodiment, main part and extension are Split type structure, and institute's extension also wraps
Conducting block is included, conducting block welds for solid construction and with main part and terminal board.
According to the one side of the utility model embodiment, first electrode terminal is made of terminal board, and terminal board is tablet
Shape.
According to the one side of the utility model embodiment, the thickness of terminal board is more than the thickness of extension, terminal board with
Extension is connected by way of laser welding and forms weld seam, and along lamina tecti to the direction of terminal board, weld seam without departing from
The surface of the remote lamina tecti of terminal board.
According to the one side of the utility model embodiment, secondary cell further includes seal, and seal is arranged on terminal
Between plate and lamina tecti.
According to the one side of the utility model embodiment, first electrode terminal further includes the boss being connected with terminal board,
Boss stretches into electrode fairlead and is welded with extension.
According to the one side of the utility model embodiment, secondary cell further includes fixing piece and connector, and fixing piece leads to
Cross connector and be fixed on lamina tecti, fixture surrounds the outer circumferential surface of first electrode terminal at least in part, by first electrode
Terminal is fixed on fixing piece.
According to the one side of the utility model embodiment, connector includes rivet nut and the limiting section being connected to each other, and
The outer circumferential surface of limiting section protrudes from the outer circumferential surface of rivet nut, and lamina tecti is fixed in one end of the remote limiting section of rivet nut, limiting section with
Fixing piece engages.
According to the one side of the utility model embodiment, connector includes the first connecting plate, one of the first connecting plate
Divide in embedded fixing piece and engaged with fixing piece, another part and the lamina tecti of the first connecting plate weld.
According to the one side of the utility model embodiment, connector includes being buckled to and back-off hole, back-off hole are arranged on top
The surface towards fixing piece of cover board, and be buckled to direction of the aperture in hole along fixing piece to lamina tecti and be incremented by, back-off is connected to
Fixing piece and be buckled to hole shape be adapted, be buckled to back-off hole coordinate.
According to the one side of the utility model embodiment, the first pole piece include coating area coated with active material and
The first lug extended from coating area, is connected with main part after the first lug bending.
According to the one side of the utility model embodiment, secondary cell further includes the first insulating part, the first insulating part bag
Body, the first Access Division and the second Access Division are included, the first wedging position is in the close terminal board side of body, the second clamping
Portion is located at the side away from the first Access Division of body, and body is contained in electrode fairlead, the first Access Division and lamina tecti
Coordinate so that the first Access Division is fixed on lamina tecti, lower insulating member is equipped with through hole, and the first insulating part passes through through hole, the second clamping
The outer circumferential surface of side and the second Access Division that portion is located at the remote lamina tecti of lower insulating member protrudes from the inner wall of through hole, by under
Portion's insulating part is fixed on the first insulating part.
According to the one side of the utility model embodiment, the first Access Division has groove, and lamina tecti blocks towards first
The side of socket part has chimb, and groove coordinates with chimb.
According to the one side of the utility model embodiment, terminal plate is by main part and the extension group being connected with main part
Into.
According to the other side of the utility model embodiment, a kind of battery modules are additionally provided, including：Bus-bar；With
Above-mentioned secondary cell, wherein, bus-bar is soldered to terminal board.
To sum up, the secondary cell and battery modules of the utility model embodiment, will match somebody with somebody positioned at the terminal plate of enclosure interior
It is set to the extension being connected including main part and with main part.Lamina tecti has an electrode fairlead, the main body section of terminal plate in
Lamina tecti keeps insulating towards housing side and by lower insulating member between lamina tecti, and by main part with being located at
The first pole piece connection in the electrode assemblie of enclosure interior, and stretched into by extension in electrode fairlead with being arranged on lamina tecti
On first electrode terminal connection.Thus it can be realized by terminal plate and the first pole piece in electrode assemblie is electrically connected to first
The purpose of electrode terminal, and first electrode terminal is without departing from a side surface of the remote lamina tecti of lower insulating member.Therefore, originally
The secondary cell and battery modules of utility model embodiment have the structure for simplifying first electrode terminal, so as to lift secondary cell
Processing efficiency, and further improve the space availability ratio of secondary cell enclosure interior, and then the energy for improving secondary cell is close
The advantages of spending.
Brief description of the drawings
This practicality may be better understood from the description to specific embodiment of the present utility model below in conjunction with the accompanying drawings
It is new, wherein：
By reading the detailed description made referring to the drawings to non-limiting example, other spies of the utility model
Sign, objects and advantages will become more apparent upon, wherein, the same or similar reference numeral represents the same or similar feature.
Fig. 1 is the decomposition texture schematic diagram according to the secondary cell of the utility model one embodiment；
Fig. 2 is the decomposition texture schematic diagram of the cap assembly in the secondary cell of Fig. 1；
Fig. 3 is the overlooking the structure diagram of the secondary cell of Fig. 1；
Fig. 4 is secondary cell in Fig. 3 along the cross-sectional view after A-A cutting line cuttings；
Fig. 5 is the partial structurtes enlarged diagram of the part A in Fig. 4；
Fig. 6 is the decomposition texture schematic diagram according to the cap assembly of the utility model another embodiment；
Fig. 7 is the dimensional structure diagram according to the terminal plate of the utility model one embodiment；
Fig. 8 is the terminal plate of Fig. 7 along the cross-sectional view after longitudinally cutting；
Fig. 9 is the three-dimensional knot of another specific example of the terminal plate in the secondary cell according to the utility model embodiment
Structure schematic diagram；
Figure 10 is the solid of another specific example of the terminal plate in the secondary cell according to the utility model embodiment
Structure diagram；
Figure 11 is the structure diagram according to the terminal assemblies part of the utility model another embodiment.
Wherein：
1- secondary cells；
100- cap assemblies；101- cap assemblies；
10- lamina tectis；11- electrode fairleads；12- riveting parts；121- rivet nuts；122- limiting sections；The second grooves of 13-；14-
Holding tank；15- liquid injection holes；The explosion-proof valve modules of 16-；20- terminal assemblies；21- terminal boards；22- fixing pieces；221- accommodation spaces；
222- vias；223- connecting holes；224- notches；23- seals；24- stop blocks；The first connecting plates of 25-；30- terminal assemblies；
31- terminal boards；32- fixing pieces；33- seals；34- stop blocks；40- lower insulating members；The first insulating parts of 41-；411- first
Access Division；The second Access Divisions of 412-；The second connecting plates of 42-；
200- housings；
300- electrode assemblies；The first lugs of 310-；The second lugs of 320-；
400- insulating protective layers；
500- terminal plates；501- terminal plates；502- terminal plates；510- main parts；511- substrates；512- wing plates；520- prolongs
Extending portion；530- conducting blocks.
Embodiment
The feature and exemplary embodiment of the various aspects of the utility model is described more fully below.Retouched in detail in following
In stating, it is proposed that many details, in order to provide the comprehensive understanding to the utility model.But for people in the art
It will be apparent that the utility model can be implemented in the case of some details being not required in these details for member.
The description to embodiment is used for the purpose of providing to the more preferable of the utility model by showing the example of the utility model below
Understanding.In the the accompanying drawings and the following description, at least part of known features and technology are not illustrated, to avoid to this reality
Unnecessary obscure is caused with new；Also, for clarity, it may be exaggerated the size of part-structure.It is identical attached in figure
Icon note represents same or similar structure, thus will omit their detailed description.In addition, feature described below,
Structure or characteristic can be incorporated in one or more embodiments in any suitable manner.
The noun of locality of middle appearance described below is the direction shown in figure, is not the secondary cell to the utility model
Concrete structure be defined.In the description of the utility model, it is also necessary to explanation, unless otherwise clear and definite regulation and limit
Fixed, term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or detachably connecting
Connect, or be integrally connected；It can be directly connected, can also be indirectly connected.For the ordinary skill in the art, may be used
Understand concrete meaning of the above-mentioned term in the utility model depending on concrete condition.
The secondary cell that the utility model embodiment provides, it is electrically operated cyclically to carry out charge and discharge, in order to secondary
Battery is used for multiple times, and the secondary cell in the utility model embodiment, and enclosure interior space is accounted for by reducing
With rate, it is possible to increase the energy density of secondary cell, and the structure of secondary cell is simple, is readily produced, therefore can be effective
The production efficiency of secondary cell is improved, reduces its cost of manufacture.
The utility model in order to better understand, with reference to Fig. 1 to Figure 11 according to the secondary of the utility model embodiment
Battery is described in detail.
Fig. 1 is the decomposition texture schematic diagram according to the secondary cell 1 of the utility model one embodiment.As shown in Figure 1, two
Primary cell 1 generallys include：Cap assembly 100, housing 200 and electrode assemblie 300, insulating protection inside housing 200
Layer 400 and terminal plate 500.
One embodiment according to the present utility model, housing 200 can be made of metal material, such as aluminium, aluminium alloy or
Nickel-plated steel.Housing 200 is formed the box-like of rectangle, and has opening, to pass through its internal accommodation space of open communication.
Electrode assemblie 300 can be formed by together stacking or winding the first pole piece, second electrode and partition plate, its
In, partition plate is the insulator between the first pole piece and second electrode.In the present embodiment, exemplarily using the first pole piece as
Positive plate, second electrode illustrate for negative plate.Similarly, in other examples, the first pole piece can also be anode
Piece, and second electrode is positive plate.In addition, positive plate active material can be applied on the coating area of positive plate, and negative plate
Active material can be applied on the coating area of negative plate.The part extended by the coating area of positive plate is then used as cathode pole
Ear, i.e. the first lug 310；The part extended by the coating area of negative plate is then used as negative lug, i.e. the second lug 320.
Insulating protective layer 400 is the film shape cap layer being made of insulating materials, and is formed with and electrode assemblie 300
The accommodation space that is adapted of profile, with the periphery by the way that insulating protective layer 400 to be coated on to electrode assemblie 300, holding electrode
It is electrically insulated between 200 inner wall of component 300 and housing.Furthermore it is also possible to insulating layer is set in 200 inner surface of housing, it is exhausted to substitute
Edge protective layer 400.
Fig. 2 is the decomposition texture schematic diagram of the cap assembly 100 in the secondary cell 1 of Fig. 1；Fig. 3 is the secondary cell of Fig. 1
1 overlooking the structure diagram；Fig. 4 is secondary cell 1 in Fig. 3 along the cross-sectional view after A-A cutting line cuttings.Such as figure
Shown in 2 to Fig. 4, cap assembly 100 is used for seal casinghousing 200, and electrode assemblie 300 is sealed in housing 200.Cap assembly
100 include：Lamina tecti 10, terminal assemblies 20, terminal assemblies 30 and lower insulating member 40.
Lamina tecti 10 is in size and dimension that is lamellar, and matching with the opening with housing 200, so as to connect
In the opening of housing 200.Lamina tecti 10 is made of metal material, such as can select the gold with 200 material identical of housing
Belong to material.In the present embodiment, electrode fairlead 11, riveting parts 12, the second groove 13, holding tank are provided with lamina tecti 10
14th, liquid injection hole 15 and explosion-proof valve module 16.
As shown in Figures 2 and 3, liquid injection hole 15 is formed on lamina tecti 10 according to preliminary dimension, to be covered in lamina tecti 10
After closing the opening of housing 200 and being tightly connected with housing 200, accommodation space from liquid injection hole 15 to housing 200 that can be by
Middle injection electrolyte.Explosion-proof valve module 16 can be using existing structure (such as by the way of setting burst disk), explosion-proof valve module 16
The approximately mid way between of lamina tecti 10 is arranged at, when due to overcharging, over-discharge or battery overheat and producing gas makes two
When the internal pressure of primary cell is excessive, the burst disk in explosion-proof valve module 16, which can be corrupted such that, to be formed in secondary cell
The gas in portion can be externally discharged by the through hole of explosion-proof valve module 16, thus, it is possible to prevent secondary cell from exploding.
Continuing with referring to Fig. 2 to Fig. 4, two electrode fairleads 11 are provided with lamina tecti 10, for by inside housing 200
Electrode assemblie 300 in electric energy be drawn out to the outside of lamina tecti 10.In one exemplary embodiment, terminal assemblies 20 are substantially
Including first electrode terminal, fixing piece 22 and seal 33；Similarly, terminal assemblies 30 generally include second electrode terminal, consolidate
Determine part 32 and seal 33.Only carried out below by taking the structure of terminal assemblies 20 and its installation form on lamina tecti 10 as an example
Exemplarily illustrate.Also, exemplarily, the terminal assemblies in the following description with terminal assemblies 20 for cathode, and terminal
Component 30 illustrates for the mode of the terminal assemblies of anode.
First electrode terminal includes terminal board 21, and terminal board 21 is the thin slice or tabular knot of square (can also be circular)
Structure, fixture 22 is surrounded the outer circumferential surface of terminal board 21 at least in part, so that terminal board 21 is fixed on fixing piece 22, into
And terminal board 21 is fixed on lamina tecti 10 by fixing piece 22.Exemplarily, fixing piece 22 is plastic parts, can use one
Plastic parts is attached to the outer circumferential surface of terminal board 21 by the mode of body injection.In an optional embodiment, first electrode terminal
Can be platy structure, and the surface of the close lamina tecti 10 of first electrode terminal is no more than the electric close to first of lamina tecti 10
The surface of extreme son (i.e. first electrode terminal is made of terminal board 21, and first electrode terminal is not stretched into electrode fairlead 11).
In one exemplary embodiment, fixing piece 22 is hard plastic part, and hard herein refers to fixing piece needs
With certain intensity, first electrode terminal can be fixed on lamina tecti 10 by fixing piece 22 so that 33 enclosed electrode of seal draws
Portal 11.Exemplarily, fixing piece 22 can be made of high-temperature insulation plastic material, for example, can use polyphenylene thioether PPS,
One or more in perfluoroalkoxy resin PEA or polypropylene PP are made.So that fixing piece 22 is can be with first electrode end
Ensure the fastening force between lamina tecti 10 while son fits closely.
Fig. 5 is the partial structurtes enlarged diagram of the part A in the secondary cell 1 of Fig. 4.As shown in Figures 2 to 5, specifically
Ground, fixing piece 22 have the accommodation space 221 that the shape with terminal board 21 is adapted, terminal board 21 can be contained in the receiving
In space 221, and fixation is bonded with terminal board 21, the fixing piece 22 that there can be part at this time is clamped at terminal board 21 and head cover
Between plate 10.In order to increase the fastening force that terminal board 21 and fixing piece 22 are engaged with each other, it is provided with the outer circumferential surface of terminal board 21
The convex portion of annular, and the convex of the annular can be accommodated by being accordingly provided with the internal face that fixing piece 22 is bonded with terminal board 21
The annular recess in portion.After terminal board 21 is placed in the accommodation space 221 of fixing piece 22, the recess of annular convex portion and annular
Snap-in structure is formed each other, so that terminal board 21 can be us shown firmly attached in fixing piece 22.Alternately, can also be solid
Determining to be formed the accommodation space that is adapted with the shape of terminal board 21 between part 22 and lamina tecti 10, (fixing piece 22 is without folder at this time
The part being located between terminal board 21 and lamina tecti 10), terminal board 21 is accommodated in this accommodation space.Certainly, it is mentioned herein
Fixation refer to terminal board 21 will not relative to fixing piece 22 occur thickness direction movement.
After first electrode terminal and fixing piece 22 are connected to each other, terminal board 21 is covered in electrode fairlead 11 and terminal board 21
Outer circumferential surface protrude from the inner wall of electrode fairlead 11 (i.e. as shown in Figure 4, the cross sectional dimensions of terminal board 21 draw more than electrode
Portal 11 cross sectional dimensions), and the surface of the remote lamina tecti 10 of terminal board 21 protrudes from fixing piece 22 away from lamina tecti
10 surface (i.e. as shown in Figure 5, upper surface of the upper surface of terminal board 21 higher than fixing piece 22).Meanwhile fixing piece 22
The side of lamina tecti 10 is provided with through hole, so that terminal board 21 can be exposed to inside housing 200 by the through hole, and then
It can realize and be electrically connected with electrode assemblie 300.
Since first electrode terminal (is not shown by 10 1 side surface of remote lamina tecti of terminal board 21 with bus-bar in figure
Go out) connection, so that when multiple secondary cells 1 carry out in series or in parallel, by increasing capacitance it is possible to increase between electrode terminal and bus-bar
Contact area, therefore the conveyance capacity of first electrode terminal can be improved.And since the outer circumferential surface of terminal board 21 protrudes from electricity
The inner wall of pole fairlead 11, therefore when assembling terminal assemblies 20 mode from top to bottom need to be taken to assemble, so terminal board 21
Only fixed by fixing piece 22, without being separately provided other fixed structures in itself in terminal board 21, therefore being capable of letter
Change the structure of first electrode terminal.The pole column structure set on lamina tecti compared to existing secondary cell, the utility model are real
Batch machining can be carried out by punching mode by applying the first electrode terminal of tabular in example, therefore can improve production efficiency, and
Reduce production cost.And the space inside housing 200 need not be taken, and then the energy of secondary cell 1 can be effectively improved
Density.
In order to keep the insulation shape between the electrode assemblie 300 and terminal plate 500 inside lamina tecti 10 and housing 200
State, 40 generally use plastic material of lower insulating member are made and substantially plate-like,
It is located at the surface towards 200 interior side of housing of lamina tecti 10.Lower insulating member 40 include two through holes and
The first insulating part 41 set around through hole, two through holes, two 11 phases of electrode fairlead with being set on lamina tecti 10 respectively
It is right, and the first insulating part 41 is respectively around the periphery for being arranged on two through holes.
In the present embodiment, in a ring, it is an integral structure the first insulating part 41 with lower insulating member 40, and first
The size of insulating part 41 is adaptably set with electrode fairlead 11, so as to which the first insulating part 41 is being inserted in electrode fairlead
When in 11, it can be fastenedly connected between electrode fairlead 11 by interference fit type, and lower insulating member 40 is connected
On lamina tecti 10.And the end face of the close first electrode terminal of 41 body of the first insulating part protrudes from the close of lamina tecti 10
The surface of first electrode terminal.Pass through connection continuing with referring to Fig. 2, one embodiment according to the present utility model, fixing piece 22
Part is fixed on lamina tecti 10, and the connector for fixing fixing piece 22 includes riveting parts 12, and riveting parts 12 include rivet nut 121 and limit
Position portion 122.121 one end of rivet nut is connected to upper surface (the i.e. side table away from enclosure interior of lamina tecti 10 of lamina tecti 10
Face), the other end is connected with limiting section 122, and the outer circumferential surface of limiting section 122 protrudes from outer circumferential surface (the i.e. limiting section of rivet nut 121
The area of 122 cross section is more than the area of the cross section of rivet nut 121).The opposite two side difference of fixing piece 22 is outside
Extension edge is extended to form, and at least one connecting hole 223, the aperture of connecting hole 223 and riveting are provided with each extension edge
The size of the rivet nut 121 of fitting 12 is adapted.
In specific implementation process, riveting parts 12 can use following several ways by 22 fixed roof plate 10 of fixing piece
On.In a specific example, rivet nut 121 can be integrally provided on lamina tecti 10 first, rivet nut 121 passes through fixing piece 22
After the connecting hole 223 of upper setting, pressure is applied to the end of the remote lamina tecti 10 of rivet nut 121, until at the end of rivet nut 121
Portion forms limiting section 122, and the surface of remote the lamina tecti 10 of limiting section 122 and fixing piece 22 is abut against each other cooperation, will consolidate
Determine part 22 and be fixed on lamina tecti 10.
In another specific example, rivet nut 121 and limiting section 122 can be an integral structure, and be set in rivet nut 121
Helicitic texture is equipped with, accordingly, the threaded hole coordinated with the helicitic texture of rivet nut 121 is provided with lamina tecti 10, in this way, rivet nut
After 121 pass through the connecting hole 223 set on fixing piece 22, make the surface of limiting section 122 and the remote lamina tecti 10 of fixing piece 22
Against cooperation, and via the threaded hole immovable fitting being correspondingly arranged in rivet nut 121 and lamina tecti 10, fixing piece 22 is fixed on top
On cover board 10.
In addition, in another specific example, it can also directly pass through one on the lamina tecti 10 with riveting parts 12
The mode of injection forms fixing piece 22, and such riveting parts 12 can directly be wrapped in the inside of fixing piece 22 and block with fixing piece 22
Scarf closes, and fixing piece 22 is fixed on lamina tecti 10.And by the way of such a integrated injection molding, will not be to fixing piece 22
Structure cause any damage.
Fig. 6 is the decomposition texture schematic diagram according to the cap assembly 101 of the utility model another embodiment.Such as Fig. 6 institutes
Show, the cap assembly 101 in the present embodiment is similar with the structure of the cap assembly 100 in above-described embodiment, so in this implementation
The component identical with above-mentioned cap assembly 100 uses identical label in example, and for having retouched in the above-described embodiments
The structure and connection relation stated will not be repeated here again.
In an optional embodiment, the connector for fixing fixing piece 22 further includes the first connecting plate 25.Specifically
Ground, the first connecting plate 25 are made of metal material, and the first connecting plate 25 includes fitting portion and the contact with fitting portion connection
Portion, wherein, contact site is fusiform structure, and concave part is formed in the side of contact site, and fitting portion is to be formed in concave part
The flange at edge.
Have notch 224 on opposite two extension edge of fixing piece 22 respectively, and notch 224 along longitudinally in its phase
To two side walls on be provided with the inlay card groove of the fitting portion that can accommodate the first connecting plate 25 so that the first connecting plate 25 is embedding
Conjunction portion can inlay card in the inlay card groove of notch 224, the contact site of the first connecting plate 25 exposes from notch 224, and lamina tecti 10
Contact.Thus, you can the contact site of the first connecting plate 25 is welded on lamina tecti 10, so as to will be incited somebody to action by the first connecting plate 25
Fixing piece 22 is fixed on lamina tecti 10.By setting concave part on the contact site of the first connecting plate 25, contact site can be reduced
With the laminated thickness of lamina tecti 10, in order to realize being welded to connect for the first connecting plate 25 and lamina tecti 10.It is optional at one
In embodiment, the upper surface of contact site and the upper surface of lamina tecti are substantially flush, and can use butt welding at this time.
In addition, in the present embodiment, exemplarily, lower insulating member 40 equally can use the welding of the second connecting plate 42 to connect
Be connected on lamina tecti 10 towards enclosure interior side.Lower insulating member 40 is connected by the second connecting plate 42 and the specific of lamina tecti 10
Connect mode and be welded to connect with above-mentioned fixing piece 22 using the first connecting plate 25 identical by the way of lamina tecti 10, therefore be no longer subject to
Repeat.
In an optional embodiment, connector is formed in the back-off on fixing piece 22 in which can also be integrated, corresponding
Ground, is provided with the back-off hole (in figure do not indicate) adaptable with back-off on lamina tecti 10.Specifically, can draw around electrode
11 surroundings of portalling set multiple back-off holes, and the aperture for being buckled to hole is incremented by along the direction of fixing piece 22 to lamina tecti 10, that is,
Say back-off hole aperture along the bottom in hole towards opening direction be in tapered trend.Accordingly, fixing piece 22 towards lamina tecti 10
A side surface be provided with the back-off that can be adapted with the back-off hole shape.Thus, you can pass through what is set on fixing piece 22
Inlay card coordinates each other in the back-off hole set in back-off and lamina tecti 10, and fixing piece 22 is fixed on lamina tecti 10.Certainly, institute here
It is increased successively that says, which is incremented by the direction of the aperture along fixing piece 22 to the lamina tecti 10 that not are requirement back-off hole, and is referred to down
The aperture of one end of the remote fixing piece 22 of button hole is more than the aperture of one end of the close fixing piece 22 in back-off hole, that is to say, that falls
The downside aperture of button hole is more than the upside aperture in back-off hole.
Certainly, the utility model embodiment is not intended to limit for the concrete structure of fixing piece 22, in other examples,
When first electrode terminal is circular or other shapes, it is only necessary to which the accommodation space of fixing piece 22 is corresponded to first electrode terminal
Shape set.In addition, lamina tecti 10 can also set riveting parts 12 away from the side of fixing piece 22, so as to lamina tecti
10 can be riveting parts 12 according to connecting lower insulating member 40 by way of being connected with fixing piece 22.
In an optional embodiment, terminal assemblies 20 can also include anti-rotation member, as shown in Fig. 2, in this implementation
In example, the anti-rotation member at terminal assemblies 20 is stop block 24, and the anti-rotation member at terminal assemblies 30 is stop block 34.With terminal
Illustrated exemplified by component 20, specifically, terminal assemblies 20 include two stop blocks 24, and two stop blocks 24 are cylindrical.
First electrode terminal it is corresponding first recessed towards being provided with two the first grooves on the surface of lamina tecti 10, and on fixing piece 22
Groove is provided with two vias 222, and lamina tecti 10 is opposite with via 222 towards being provided with the surface of first electrode terminal
Two the second grooves 13, two stop blocks 24 through be respectively embedded into after two vias 222 of fixing piece 22 two the first grooves and
In two the second grooves 13.Thus, two fixing points can be formed on lamina tecti 10 to the first electricity by two stop blocks 24
Extreme son and fixing piece 22 are positioned, and avoid first electrode terminal and fixing piece 22 along the surface of lamina tecti 10 with respect to lamina tecti
10 rotate.At the same time, additionally it is possible to avoid first electrode terminal and fixing piece 22 from being moved relative to each other, therefore anti-rotation is set
Component can also ensure that the bond stability between first electrode terminal and fixing piece 22, prevent first electrode terminal and fixing piece
22 are separated from each other and influence the stable structure of terminal assemblies 20.Certainly, quantity of the utility model embodiment for stop block 24
And be not limited, in other examples, terminal assemblies 20 can also include more stop blocks 24.Certainly, at some
In embodiment, stop block 24 is an integral structure with lamina tecti 10, or stop block 24 is an integral structure with terminal board 21.
In addition, concrete structure and anti-rotation member and first electrode terminal of the utility model embodiment for anti-rotation member
Juncture between lamina tecti 10 is simultaneously not limited.For example, in other examples, anti-rotation member can also include
Other for being correspondingly arranged between first electrode terminal and fixing piece 22 between fixing piece 22 and lamina tecti 10 can match somebody with somebody each other
The protrusion and groove structure of conjunction.Further, since first electrode terminal and fixing piece 22 are all square, so can also be only in fixation
Anti-rotation member is correspondingly arranged between part 22 and lamina tecti 10, is rotated with limiting fixing piece 22 relative to lamina tecti 10.
Continuing with referring to Fig. 2 to Fig. 5, specifically, one embodiment according to the present utility model, seal 23 is arranged on
Between the terminal board 21 and lamina tecti 10 of one electrode terminal.For seal 23 in an optional embodiment, seal 23 is ring
Shape, the surface of its towards lamina tecti 10 are configured to hierarchic structure, i.e. the surface towards lamina tecti 10 of seal 23 is provided with
Ring projection.Lamina tecti 10 is provided with the holding tank 14 of annular, the ring projection of seal 23 around electrode fairlead 11
(as shown in Figure 5) can be entrenched in holding tank 14, to be positioned by holding tank 14 to seal 23, avoids seal 23
It is moved between the terminal board 21 and lamina tecti 10 of first electrode terminal.Certainly, holding tank 14 can also be arranged on terminal
Plate 21 towards on the surface of lamina tecti 10, by setting holding tank 14 equally to be carried out to seal 23 on terminal board 21
Positioning.
In the present embodiment, seal 23 at the same time with the terminal board 21, fixing piece 22, lamina tecti 10 of first electrode terminal with
And lower insulating member 40 is in close contact, therefore seal 23 can be subject to the extruding force of equilibrium, seal 23 is filled up appearance
Receive the space of groove 14, therefore be capable of the sealing effect of further lift-off seal part 23.And seal 23 is arranged on hull outside
Mode, it can be avoided to touch the electrolyte of enclosure interior, prevent seal occur Swelling.
Certainly, the utility model embodiment for seal 23 concrete shape and be not limited, others implement
In example, the shape of seal 23 can also be configured to rectangle or other shapes, certainly, the holding tank on lamina tecti 10 at this time
14 need the shape with seal 23 adaptably to set.In addition, in certain embodiments, can also be by fixing piece 22 and sealing
Part 23 is arranged to the structure of integral type, and the material of fixing piece 22 needs both to possess sealing function again with certain hard at this time certainly
Degree.
As shown in Figure 1, terminal plate 500 is located inside housing 200, secondary cell 1 has two terminal plates 500, and two connect
Line plate 500 corresponds to positive plate respectively and negative plate sets (as shown in Figure 1), and is connected to first electrode terminal and first
Between pole piece and between second electrode terminal and the second pole piece.That is, two terminal plates 500 are respectively used to connection cathode
Terminal and positive pole ear (the first lug 310), and negative terminal and negative lug (the second lug 320).And exemplarily,
By taking terminal plate 500 is connected between first electrode terminal and the first pole piece as an example, the structure of butted line plate 500 illustrates.
Fig. 7 is the dimensional structure diagram according to the terminal plate 500 of the utility model one embodiment；Fig. 8 is connecing for Fig. 7
Line plate 500 is along the cross-sectional view after longitudinally cutting.It should be noted that the terminal plate 500 in the sectional structure chart of Fig. 5
It is identical with the terminal plate 500 in Fig. 7 and Fig. 8.
As shown in Fig. 5, Fig. 7 and Fig. 8, one embodiment according to the present utility model, terminal plate 500 includes main part 510
With the extension 520 being connected with main part 510, wherein main part 510 is located at the one of the remote lamina tecti 10 of lower insulating member 40
Side, for being electrically connected with the first lug 310；And extension 520 can extend into electrode fairlead 11 with first electrode terminal electricity
Connection.Thus, first electrode terminal can be electrically connected to positive plate, also, along lamina tecti 10 to the side of lower insulating member 40
A side surface (i.e. under lower insulating member 40 to, first electrode terminal without departing from the remote lamina tecti 10 of lower insulating member 40
Surface).In one embodiment, main part 510 includes substrate 511 and wing plate 512.Substrate 511 is configured to plate-like structure,
And substrate 511 is parallel with lamina tecti 10.Certainly, the parallel of meaning is not the parallel of stricti jurise herein, i.e., specific
In implementation process, it is allowed to which error occurs in the depth of parallelism of substrate 511 and lamina tecti 10, but can't influence substrate 511 and head cover
The almost parallel result of plate 10.Wing plate 512 is configured to the platy structure of bar shaped, its along 511 one side edge of substrate substantially in
Heart position extends laterally.Thus, it can be electrically connected and (be electrically connected with the first pole piece with the first lug 310 by substrate 511
Connect).
Exemplarily, extension 520 is the protrusion being arranged on 10 1 side surface of close lamina tecti of main part 510.Such as
Shown in Fig. 7 and Fig. 8, in the present embodiment, protrusion is provided with wing plate 512, and by setting the protrusion and in wing plate 512
10 1 side surface of remote lamina tecti formed recess.That is, the raised annular sidewall for including roof and being connected with roof, makes
Raised it must be opened wide in 10 side of remote lamina tecti of wing plate 512.In one exemplary embodiment, when main part 510 and extension
When portion 520 is an integral structure, extension 520 can be the cylinder formed using stamping forming mode on wing plate 512
Convex closure.Main part 510 can be so fitted in the surface of 10 side of remote lamina tecti of lower insulating member 40 so that extension
520 can extend into electrode fairlead 11 with first electrode termination contact, so as to by extension 520 and first electrode terminal soldering
Connect in succession.
Since substrate 511 is plate-like structure, so when the first lug 310 of electrode assemblie 300 is connected with substrate 511,
Need to be bent the first lug 310, so that the first lug 310 can be connected (such as Fig. 1 institutes by bending side with substrate 511
Show).Exemplarily, the first lug 310 can be connected to substrate 511 by way of ultrasonic bonding.Certainly, due at this
In embodiment, main part 510 is also respectively provided with extension board in the both sides of wing plate 512, it is possible to while by two groups or two groups
Electrode assemblie 300 above is connected to main part 510, and two can be included at least inside the housing 200 of so each secondary cell 1
Group electrode assemblie 300., can since the connection mode of the first lug 310 and terminal plate 500 of electrode assemblie 300 is simple
The effectively efficiency of assembling of lifting secondary cell 1.
Extension 520 is formed by way of the punching press convex closure on terminal plate 500 so that terminal plate 500 can extend into electricity
It is electrically connected in pole fairlead 11 with first electrode terminal, and first electrode terminal then need not be in lamina tecti 10 towards housing
Increase sets other structures to be electrically connected with terminal plate 500 at the surface of 200 sides, that is to say, that first electrode terminal towards
Surface inside housing 200 can be configured to the lower surface without departing from lamina tecti 10.Therefore can reduce empty to the inside of housing 200
Between occupancy, so as to effectively improve the energy density of secondary cell.And structure and the process letter of terminal plate 500
It is single, it can be made by simply cutting with impact style, institute, and can so as to the processing cost of reduction secondary cell 1
Reduce the difficulty of processing of secondary cell 1.
Further, since can produce weld seam and welding slag after welding, it is (i.e. remote that these parts can reduce by 21 upper surface of terminal board
The surface of lamina tecti 10) planarization, in order to avoid this problem occurs, the thickness of terminal board 21 needs to be more than extension 520
Walled thickness, terminal board 21 is connected with extension 520 by way of laser welding, remote terminal of the laser from lamina tecti 10
A part for the side transmitting of plate 21, laser penetration extension 520 and terminal board 21, so that terminal board 21 and extension
Weld seam is formed between 520, the upper surface of terminal board 21 still keeps smooth at this time.Fig. 9 is according to the utility model embodiment
The dimensional structure diagram of another specific example of the terminal plate 501 in secondary cell 1.In the present embodiment, with above-mentioned Fig. 7 and
Identical component uses identical label in terminal plate 500 shown in Fig. 8, and same description will not repeat again.
As shown in figure 9, the terminal plate 501 in the present embodiment equally includes main part 510 and extension 520, extension 520 is similarly shape
Into the protrusion on the wing plate 512 of main part 510, and the protrusion forms recess in wing plate 512 away from 10 side of lamina tecti.
But be with the difference of the terminal plate 500 in above-described embodiment, protrusion includes bottom wall and is connected with roof and phase each other
To two side walls so that recess 10 side of remote lamina tecti of wing plate 512 and with away from 10 side of lamina tecti it is adjacent simultaneously
Both sides relative to each other are opened wide.Thus, it is possible to the gas produced in use by the recess storage secondary cell 1 of formation
(i.e. the inside of housing 200 can accommodate more gases), is subject to shell so as to reduce the burst disk in explosion-proof valve module 16
The active force for the gas that the inside of body 200 produces, can improve the service life of burst disk.
In addition, when main part 510 and extension 520 are an integral structure, extension 520 can use punch forming
The bent convex closure that is formed on wing plate 512 of mode.Observe in the horizontal direction, be provided with the main part 510 of extension 520
Part is configured to n fonts.Main part 510 can be so fitted in the table of 10 side of remote lamina tecti of lower insulating member 40
Face so that extension 520 can extend into electrode fairlead 11 with first electrode termination contact, so as to by extension 520 with
First electrode terminal is welded to connect.In addition, in another optional embodiment, above-mentioned terminal plate 501 can also be configured
For its extension 520 includes roof and a side wall being connected with roof so that remote lamina tecti 10 of the recess in wing plate 512
Side and three sides adjacent with the side of the remote lamina tecti 10 of wing plate 512 open wide respectively.Observe in the horizontal direction, if
510 part of main part for being equipped with extension 520 is configured to z fonts.
Figure 10 is another specific example of the terminal plate 502 in the secondary cell 1 according to the utility model embodiment
Dimensional structure diagram.In the present embodiment, the component identical with the terminal plate 500 shown in above-mentioned Fig. 7 and Fig. 8 uses identical
Label, and same description will not repeat again.As shown in Figure 10, the terminal plate 502 in the present embodiment equally includes
Main part 510 and extension 520, extension 520 is similarly the protrusion on the wing plate 512 for being formed in main part 510, and this is convex
Rise and form recess away from 10 side of lamina tecti in wing plate 512.
In the present embodiment, terminal plate 502 and the difference of the terminal plate 500 in above-described embodiment are, main part
510 and extension 520 be Split type structure, i.e. extension 520 further includes conducting block 530.That is, the extension in the present embodiment
Portion 520 includes raised and 530 two parts of conducting block, wherein, in raised generation type and above-described embodiment on main part 510
Generation type it is identical, and conducting block 530 is solid construction and is stacked in protrusion.By setting conducting block 530, for conduct
For the second electrode terminal of negative electrode terminal, it can be easy to carry out copper between second electrode terminal and the second lug 320
Aluminium is changed.
In order to increase the weld strength between bus-bar and first electrode terminal and second electrode terminal and bus-bar, lead to
Often need to ensure that first electrode terminal and second electrode terminal and the part of bus-bar connection have same base with bus-bar
Body metal.Specifically, in the present embodiment, exemplarily, the material of bus-bar is aluminium, accordingly first electrode terminal and second
The material of the respective terminal board 21 of electrode terminal all uses aluminium.Since the material of the second lug 320 of electrode assemblie 300 is copper,
So the main part 510 for the terminal plate 502 being connected with the second lug 320 is copper, while it is integrally formed in convex on main part 510
It is also copper to rise.
For the ease of realizing between the protrusion using copper product and the terminal board 31 of the second electrode terminal using aluminum
Be welded to connect, the conducting block 530 using aluminum can be set between raised and terminal board 21.Due to raised roof very
It is thin, and conducting block 530 can have less thickness, so conducting block 530 and protrusion can be used supersonic welding first
The mode connect connects.Next will be stretched into including raised and conducting block 530 extension 520 in electrode fairlead 11, and by the
The terminal board 31 of two electrode terminals connects (laser leaning on from lamina tecti 10 at this time with conducting block 530 by the way of laser welding
A part for the side transmitting of near-end daughter board 21, laser penetration terminal board 21 and conducting block 530), to obtain sufficiently connection
Intensity.Thus, copper aluminium conversion can be carried out between second electrode terminal and the second lug 320 by terminal plate 502, is simplified
Attended operation process between terminal plate 502 and second electrode terminal and the second lug 320, additionally it is possible to make second electrode terminal
And second have stronger bonding strength between lug 320, increase the use reliability of secondary cell.
In addition, in certain embodiments, first electrode terminal can also not only include terminal board 21, first electrode terminal
It can also include the boss (not shown) for being arranged on 10 side of close lamina tecti of terminal board 21, which can extend into electricity
In pole fairlead 11.When second end daughter board 212 includes boss, as long as the thickness of boss is without departing from the following table of lower insulating member 40
Face, would not take the space inside housing 200.Based on setting boss on first electrode terminal so that first electrode terminal
The extension 520 in electrode fairlead 11 with the terminal plate in any of the above-described embodiment can be stretched into by boss to be welded to connect.
Figure 11 is the structure diagram according to 20 part of terminal assemblies of the utility model another embodiment.Such as Figure 11 institutes
Show, in the present embodiment, component same with the above-mentioned embodiment uses identical label, and for having been described in
Component will not repeat again.In the present embodiment, the first insulating part 41 in secondary cell and first in above-described embodiment
41 difference of insulating part is that the first insulating part 41 and lower insulating member are Split type structure.
Exemplarily, by taking the first insulating part 41 for being arranged on 20 side of terminal assemblies as an example, the first insulating part 41 includes body
Portion, the first Access Division 411 and the second Access Division 412.Body part fits in electrode fairlead 11 in electrode fairlead 11
Internal face, so as to be kept between first electrode terminal and terminal plate 500 and lamina tecti 10 in electrode fairlead 11 exhausted
Edge.First Access Division 411 is cricoid chimb, its be arranged on the edge of 21 one end of close terminal board of body and radially to
Outside extends.And the end face towards 10 side of lamina tecti of the first Access Division 411 is provided with the groove of annular.On lamina tecti 10
Groove on corresponding first Access Division 411 is provided with cricoid chimb, draws when the body of the first insulating part 41 is placed in electrode
After portalling in 11, the groove of the chimb and above-mentioned first Access Division 411 is engaged by clamping each other, and the first insulating part 41 is fixed on
In electrode fairlead 11.
And the second Access Division 412 of the first insulating part 41 is similarly cricoid chimb, lower insulating member 40 is equipped with through hole, the
One insulating part 41 passes through through hole, and the second Access Division 412 is arranged on the side of the remote lamina tecti 10 of the first insulating part 41 and along footpath
To extending laterally.To coat the through hole edge of lower insulating member 40 by the second Access Division 412, lower insulating member 40 is fixed
In the first insulating part 41, so by lower insulating member 40 be fixed on lamina tecti 10 towards 200 interior side of housing.
Certainly, in an optional embodiment, can also only by the first insulating part 41 the first Access Division 411 with
Lower insulating member 40 is fixed on lamina tecti 10 by the end face of 21 side of close terminal board of lamina tecti 10 against cooperation.
In the above-described embodiments, main part 510 and extension 520 are an integral structure, but the implementation of the utility model
Example is not limited to this.In other examples, main part 510 and extension 520 can also be Split type structure, at this point it is possible to
Main part 510 is connected with extension 520 each other by the mode of welding.In addition, in the above-described embodiments, extension 520 is set
Put on wing plate 512, thus obtain more flexible attended operation, but the embodiment of the utility model is not limited to this,
In other embodiments, extension 520 can also be set directly on substrate 511.That is main part 510 is configured to whole
The platy structure of body.
Another embodiment according to the present utility model, additionally provides a kind of battery modules, including bus-bar (does not show in figure
Go out) and any of the above-described embodiment secondary cell 1, wherein, bus-bar is welded to connect on the terminal board 21 of secondary cell 1.
The utility model can be realized in other specific forms, without departing from its spirit and essential characteristics.Therefore, currently
Embodiment be all counted as being exemplary rather than in all respects it is limited, the scope of the utility model by appended right will
Ask rather than foregoing description definition, also, fall into claim implication and equivalent in the range of it is whole change so as to all by
It is included among the scope of the utility model.Also, the different technologies feature occurred in different embodiments can be combined,
To obtain beneficial effect.Those skilled in the art will be understood that simultaneously on the basis of studying accompanying drawing, specification and claims
Realize the embodiment of other changes of revealed embodiment.
Claims (21)
- A kind of 1. secondary cell, it is characterised in that including：Housing, has opening；Electrode assemblie, is contained in the housing, including the first pole piece, the second pole piece and is arranged on first pole piece and institute State the partition plate between the second pole piece；Cap assembly, including lamina tecti and first electrode terminal, the lamina tecti cover the opening and have electrode fairlead, The first electrode terminal includes terminal board, and the terminal board is located at the side of the lamina tecti and the covering electrode is drawn Hole；Lower insulating member, positioned at the side of the remote terminal board of the lamina tecti；AndTerminal plate, the terminal plate include main part and the extension being connected with the main part, and the main body section is in described The side of the remote lamina tecti of lower insulating member and it is connected with first pole piece, the extension stretches into the electrode and draws It is connected in portalling and with the first electrode terminal, first pole piece is electrically connected to the first electrode by the terminal plate Terminal, also, it is exhausted without departing from the lower part along the lamina tecti to the direction of the lower insulating member, the first electrode terminal The surface of the remote lamina tecti side of edge part.
- 2. secondary cell according to claim 1, it is characterised in that the main part is put down in the form of sheets and with the lamina tecti OK, the extension includes being arranged on the protrusion of close the lamina tecti side of the main part, described raised and described the One electrode terminal connects.
- 3. secondary cell according to claim 2, it is characterised in that the main part and the extension are integral type knot Structure, and it is described raised and in the side of the remote lamina tecti of main part formation recess by being formed.
- 4. secondary cell according to claim 3, it is characterised in that the protrusion includes roof and is connected with the roof Annular sidewall so that the recess is opened wide in the remote lamina tecti side of the main part.
- 5. secondary cell according to claim 3, it is characterised in that the protrusion includes roof and is connected with the roof And two side walls relative to each other so that the recess the side of the remote lamina tecti of the main part and with it is described The both sides that the side of the remote lamina tecti of main part is adjacent are opened wide respectively.
- 6. secondary cell according to claim 3, it is characterised in that the protrusion includes roof and is connected with the roof A side wall so that the recess is in the side of the remote lamina tecti of the main part and remote with the main part Three sides adjacent from the side of the lamina tecti are opened wide respectively.
- 7. according to claim 3 to 6 any one of them secondary cell, it is characterised in that the main part include substrate and by The wing plate of the edge extension of the substrate, the substrate are connected with first pole piece, and the extension is arranged on the wing plate On.
- 8. secondary cell according to claim 2, it is characterised in that the main part and the extension are split knot Structure, institute's extension further include conducting block, and the conducting block welds for solid construction and with the main part and the terminal board Connect.
- 9. secondary cell according to claim 1, it is characterised in that the first electrode terminal is by the terminal board group Into the terminal board is tabular.
- 10. secondary cell according to claim 9, it is characterised in that the thickness of the terminal board is more than the extension Thickness, the terminal board is connected by way of laser welding with the extension and forms weld seam, and along the head cover Plate is to the direction of the terminal board, surface of the weld seam without departing from the remote lamina tecti of the terminal board.
- 11. secondary cell according to claim 1, it is characterised in that further include seal, the seal is arranged on institute State between terminal board and the lamina tecti.
- 12. secondary cell according to claim 1, it is characterised in that the first electrode terminal further includes and the end The boss of daughter board connection, the boss stretch into the electrode fairlead and are welded with the extension.
- 13. secondary cell according to claim 1, it is characterised in that further include fixing piece and connector, the fixing piece The lamina tecti is fixed on by the connector, the outer circumferential surface of the first electrode terminal is at least in part by the fixing piece Surround, the first electrode terminal is fixed on the fixing piece.
- 14. secondary cell according to claim 13, it is characterised in that the connector include the rivet nut that is connected to each other and Limiting section, and the outer circumferential surface of the limiting section protrudes from the outer circumferential surface of the rivet nut, the remote limiting section of the rivet nut One end be fixed on the lamina tecti, the limiting section is engaged with the fixing piece.
- 15. secondary cell according to claim 13, it is characterised in that the connector includes the first connecting plate, described The part of first connecting plate is embedded in the fixing piece and engage with the fixing piece, another part of first connecting plate and The lamina tecti welding.
- 16. secondary cell according to claim 13, it is characterised in that the connector includes being buckled to and back-off hole, institute State back-off hole and be arranged on the surface towards the fixing piece of the lamina tecti, and the aperture in the back-off hole is along the fixation The direction of part to the lamina tecti is incremented by, and the back-off is connected to the fixing piece and is adapted with the shape in the back-off hole, The back-off coordinates with the back-off hole.
- 17. secondary cell according to claim 1, it is characterised in that first pole piece includes being coated with active material Coating area and the first lug for extending from the coating area, be connected with the main part after first lug bending.
- 18. secondary cell according to claim 1, it is characterised in that further include the first insulating part, first insulating part Including body, the first Access Division and the second Access Division, first wedging position is in the close terminal of the body Plate side, second wedging position are accommodated in the side of remote first Access Division of the body, the body In the electrode fairlead, first Access Division coordinates with the lamina tecti first Access Division is fixed on the top Cover board, the lower insulating member are equipped with through hole, and first insulating part passes through the through hole, and second wedging position is in described The side of the remote lamina tecti of lower insulating member and the outer circumferential surface of second Access Division protrude from the inner wall of the through hole, The lower insulating member is fixed on first insulating part.
- 19. secondary cell according to claim 18, it is characterised in that first Access Division has groove, the top The side towards first Access Division of cover board has chimb, and the groove coordinates with the chimb.
- 20. secondary cell according to claim 1, it is characterised in that the terminal plate by the main part and with it is described The extension composition of main part connection.
- A kind of 21. battery modules, it is characterised in that including：Bus-bar；WithSecondary cell as any one of claim 1 to 20, wherein, the bus-bar is soldered to the terminal board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102068.6U CN207233789U (en) | 2017-08-30 | 2017-08-30 | Secondary cell and battery modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102068.6U CN207233789U (en) | 2017-08-30 | 2017-08-30 | Secondary cell and battery modules |
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| CN207233789U true CN207233789U (en) | 2018-04-13 |
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