CN207250580U - Cap assembly and battery for battery - Google Patents

Abstract

The utility model discloses a kind of cap assembly and battery for battery, battery includes positive plate, negative plate, membrane, box hat and cap assembly, and cap assembly includes：Welded plate, welded plate include accommodating chamber and along the outside horizontal-extending epitaxy parts of accommodating chamber outer side edges；Safety valve, safety valve are concave shape structure, including lower cavity part with from the outwardly extending first connecting portion of lower cavity part periphery wall, safety valve is by being welded to connect in welded plate upper end；Head cover, head cover are convex form structure, including upper cavity part with from the outwardly extending second connecting portion of upper cavity part periphery wall, safety valve is oppositely arranged with head cover and limits airtight chamber jointly, and is connected between first connecting portion and second connecting portion by soldering；And first cushion rubber, the first cushion rubber is insulating part, inside box hat, to obstruct the connection between box hat and welded plate, safety valve and head cover.The cap assembly is simple in structure, and design is reasonable, and securely and reliably, thickness is small, improves the space availability ratio of battery.

Description

Cap assembly and battery for battery

Technical field

It the utility model is related to technical field of lithium ion, more particularly to a kind of cap assembly and electricity for battery Pond.

Background technology

As the further expansion of electric automobile market and the requirement to course continuation mileage are constantly lifted, vehicle enterprise is to power Battery is proposed higher in energy density lifting, the decline of manufacture cost, cycle life increase and product adeditive attribute etc. Requirement.The volume of appropriate increase cylindrical battery is to obtain more battery capacities into a kind of feasible program.Existing cylinder The design of power battery cap is mostly bound edge arc-welding design or metal ring design, and bound edge or becket can increase the thickness of head cover, The space availability ratio of battery is reduced, while the density of battery is also affected to some extent, and block of the prior art Design unreasonable, complicated, security performance is low.

The content of the invention

In view of the above-mentioned problems of the prior art, a purpose of the utility model be to propose it is a kind of for battery Cap assembly, the cap assembly is simple in structure, and design is reasonable, and securely and reliably, thickness is small, improves the space availability ratio of battery.

Another purpose of the utility model is to propose a kind of battery with the above-mentioned cap assembly for battery.

According to the cap assembly for battery of the utility model embodiment, the battery include positive plate, negative plate, every Film, box hat and cap assembly, the positive plate are spaced in the box hat successively with the negative plate, and the membrane is positioned at just Between pole piece and the negative plate, the cap assembly is arranged on the upper end of the battery, and the upper end bending of the box hat, is suitable for The fixed cap assembly, the cap assembly include：Welded plate, the welded plate include accommodating chamber and along the accommodating chambers The outside horizontal-extending epitaxy part of periphery wall；Safety valve, the safety valve are concave shape structure, including lower cavity part with described The outwardly extending first connecting portion of chamber portion periphery wall, the safety valve is by being welded to connect in the welded plate upper end；Head cover, institute It is convex form structure to state head cover, including upper cavity part with from the outwardly extending second connecting portion of upper cavity part periphery wall, the peace Full valve is oppositely arranged with the head cover and limits airtight chamber jointly, and between the first connecting portion and the second connecting portion Connected by soldering；And first cushion rubber, first cushion rubber is insulating part, described to obstruct inside the box hat Connection between box hat and the welded plate, the safety valve and the head cover.

In the technical scheme, by setting first connecting portion and second connecting portion respectively on safety valve and head cover, and And connected between first connecting portion and second connecting portion using soldering, it can make shared by the connection between safety valve and head cover Space is small, so as to substantially reduce the thickness of cap assembly, improves the space availability ratio of battery, and the cap assembly structure Simply, design is reasonable.

In addition, the cap assembly according to the present utility model for battery, can also have following technical characteristic：

Further, the second cushion rubber is further included, second cushion rubber is equipped with cavernous structure insulating part for centre, and is arranged on institute State between welded plate and the safety valve.

Further, second cushion rubber includes the first ring portion, the second ring portion and the 3rd ring portion, and first ring portion is to set There is the ring-shaped structure of looping pit, second ring portion is integrally formed in the outer of first ring portion, and perpendicular to described One ring portion, the 3rd ring portion is integrally formed in the upper end edge of second ring portion, and the 3rd ring portion is perpendicular to described Two ring portions.

Further, second ring portion is equipped with second raised, and second protrusion is cyclic structure, along described the The inner top side of two ring portions is set.

Preferably, first cushion rubber and second cushion rubber are PP parts.

Further, first cushion rubber includes main part and the supporting part for being integrally formed in the main part lower end, institute It is C-shaped configuration to state main part, and the support zone is between the box hat and the welded plate.

Further, the main part is inner raised along being equipped with first, and first protrusion is supported only in the described second connection On the lower face in portion.

Further, the supporting part is slab construction, arranged on the lower end of the welded plate, suitable for the epitaxy part just It is right.

Preferably, laser welding is passed through between the safety valve and the welded plate.

The above-mentioned cap assembly for battery is had according to the battery of the utility model second aspect embodiment, due to above-mentioned Cap assembly has simple in structure, and design is reasonable, securely and reliably, the advantages that thickness is small.Therefore, according to the utility model embodiment Battery there is the advantages that production cost is low, and security performance is high, and space availability ratio is high, and battery capacity is big.

Brief description of the drawings

Fig. 1 is the cap assembly structure diagram for battery；

Fig. 2 is the partial enlarged view at I in Fig. 1；

Fig. 3 is the battery structure schematic diagram with the cap assembly.

Reference numeral：

Welded plate 1；Accommodating chamber 11；Epitaxy part 12；

Safety valve 2；Lower cavity part 21；First connecting portion 22；

Head cover 3；Upper cavity part 31；Second connecting portion 32；

First cushion rubber 4；Main part 41；First protrusion 411；Supporting part 42；

Second cushion rubber 5；First ring portion 51；Second ring portion 52；Second protrusion 521；3rd ring portion 53；

Box hat 6.

Embodiment

1 to Fig. 3 the utility model is described in further detail below in conjunction with the accompanying drawings.

According to the cap assembly for battery of the utility model embodiment, as shown in FIG. 1 to 3, battery includes cathode Piece, negative plate, membrane, box hat 6 and cap assembly, positive plate are spaced in box hat 6 successively with negative plate, and membrane is located at cathode Between piece and the negative plate, that is to say, that the structure of the generally cylindrical type of box hat 6 and open upper end, positive plate and negative plate It is cyclic structure, is arranged at intervals successively inside box hat 6, and is separated positive plate and negative plate with membrane；Cap assembly is set In the upper end of battery, and the upper end bending of box hat 6, suitable for fixed cap assembly, specifically, cap assembly is being formed as battery just Pole, box hat 6 are formed as the anode of battery, and 6 upper end of box hat can be fixed with machined bending and cap assembly insulation.Block group Part includes：Welded plate 1, safety valve 2,3 and first cushion rubber 4 of head cover.

Welded plate 1, welded plate 1 include accommodating chamber 11 and along the outside horizontal-extending epitaxy parts of 11 periphery wall of accommodating chamber 12, specifically, welded plate 1 is cylindrical structural, and is equipped with epitaxy part 12 in the sidewall upper of weld part, and welded plate 1 is to block Component plays the role of support, and welded plate 1 draws end and be connected with positive plate by connecing；

Safety valve 2, safety valve 2 are concave shape structure, including lower cavity part 21 with it is outwardly extending from 21 periphery wall of lower cavity part First connecting portion 22, safety valve 2 is by being welded to connect in 1 upper end of welded plate, and specifically, safety valve 2 is designed to concave shape structure Can conveniently it be positioned in the accommodating chamber 11 of welded plate 1, epitaxy part 12 is suitable for support first connecting portion 22, and under lower cavity part 21 It is fixedly connected between end face and the upper surface of welded plate 1 by welding manner, can also so reduces safety valve 2 and welded plate 1 Between connection space；

Head cover 3, head cover 3 are convex form structure, including upper cavity part 31 with from 31 periphery wall of upper cavity part outwardly extending second Connecting portion 32, safety valve 2 is oppositely arranged with head cover 3 and limits airtight chamber jointly, and first connecting portion 22 and second connecting portion Connected between 32 by soldering, specifically, head cover 3 is arranged to convex form structure, in order to facilitate battery and other connecting portions Connection, by between first connecting portion 22 and second connecting portion 32 soldering connect, can so make head cover 3 and safety valve 2 Between connection structure it is simple, occupy little space, fixation；And

First cushion rubber 4, the first cushion rubber 4 is insulating part, inside box hat 6, to obstruct box hat 6 and welded plate 1, safety Connection between valve 2 and head cover 3, specifically, exterior box hat 6 are the anode of battery, and the cathode that cap assembly is battery, in order to Prevent positive and negative anodes are connected from causing battery that short circuit occurs, and the first cushion rubber 4 is set.

It is understood that by setting first connecting portion 22 and second connecting portion respectively on safety valve 2 and head cover 3 32, and connected between first connecting portion 22 and second connecting portion 32 using soldering, it can make between safety valve 2 and head cover 3 The shared space of connection is small, so as to substantially reduce the thickness of cap assembly, improves the space availability ratio of battery, and should Cap assembly is simple in structure, and design is reasonable.

In one embodiment of the utility model, as shown in FIG. 1 to 3, the second cushion rubber 5 is further included, the second cushion rubber 5 is Centre is equipped with cavernous structure insulating part, and arranged between welded plate 1 and safety valve 2, it is to send out battery to set the second cushion rubber 5 Life plays a protective role battery when overcharging；Specifically, specifically, when battery is used or overcharged due to exception, inside battery Pressure increased dramatically, and the exhausting-gas hole of the welded plate 1 of pressure is acted on the safety valve 2 being attached thereto, when acting on safety valve 2 When power is more than the welding pulling force between welded plate 1 and safety valve 2, welded plate 1 is disengaged with 2 pad of safety valve, in order to form weldering Power-off protection when being completely separated between fishplate bar 1 and safety valve 2, makes battery more safe and reliable, in welded plate 1 and safety valve 2 Between the second cushion rubber 5 is set.

In one embodiment of the utility model, as shown in FIG. 1 to 3, the second cushion rubber 5 includes the first ring portion 51, the Two ring portions 52 and the 3rd ring portion 53, the first ring portion 51 are the ring-shaped structure equipped with looping pit, so can be welded plate 1 and peace Connection leaving space between full valve 2, is welded easy to welded plate 1 and safety valve 2, and the second ring portion 52 is integrally formed in the first ring portion 51 outer, and perpendicular to the first ring portion 51, the periphery wall of lower cavity part 21 and the periphery wall of accommodating chamber 11 can so be carried out Isolation, the 3rd ring portion 53 are integrally formed in the upper end edge of the second ring portion 52, and the 3rd ring portion 53 is perpendicular to the second ring portion 52, so Epitaxy part 12 can be made to be isolated with first connecting portion 22, that is to say, that the shape of the second cushion rubber 5 and welded plate 1 and safety Valve 2 is identical, can so make more compact between safety valve 2 and welded plate 1.

Further, the second ring portion 52 is equipped with the second protrusion 521, and the second protrusion 521 is cyclic structure, along the second ring The inner top side in portion 52 is set, and can so be limited safety valve 2 in the up-down direction by 51 upper surface of the first ring portion to second Between second protrusion 521 of ring portion 52, play the role of limitation and fixation to safety valve 2.

Preferably, the first cushion rubber 4 and the second cushion rubber 5 are PP parts, and PP parts have that price is low, good corrosion resistance and higher Surface smoothness, price is low can to reduce the overall manufacture cost of battery, and good corrosion resistance can make 4 He of the first cushion rubber The service life of second cushion rubber 5 extends, and surface smoothness height can make the connection sealing of the first cushion rubber 4 and the second cushion rubber 5 good.

In some embodiments of the utility model, as shown in FIG. 1 to 3, the first cushion rubber 4 includes main part 41 and one The supporting part 42 of 41 lower end of main part is formed in, main part 41 is C-shaped configuration, and supporting part 42 is extended downward at welded plate 1.Tool Body, main part 41 is arranged to C-shaped configuration, first connecting portion 22 and second connecting portion 32 can be wrapped up it is compacter, into And prevent that head cover 3 and safety valve 2 are in contact with box hat 6, and supporting part 42 is extended at welded plate 1, this is because welding Plate 1 is the bottom of cap assembly, it is in contact with box hat 6 in order to prevent, so 42 lower edge of supporting part by the first cushion rubber 4 To welded plate 1.

Further, as shown in Fig. 2, main part 41 is inner along being equipped with the first protrusion 411, the first protrusion 411, which is supported, stops the On the lower face of two connecting portions 32, that is to say, that in the inner wall of the main part 41 around C-shaped, the first protrusion 411 is set so that the One protrusion 411 is contacted with the lower face of second connecting portion 32, can so play sealing function, specifically, battery further includes electricity Liquid is solved, electrolyte is distributed in inside box hat 6, and electrolyte is flowed out by the main part 41 of the first cushion rubber 4 in order to prevent, so in main body First protrusion 411 is set on the inner wall in portion 41, so that inside battery structure is sealed.

In one embodiment of the utility model, as shown in FIG. 1 to 3, supporting part 42 is slab construction, arranged on welding The lower end of plate 1, suitable for 12 face of epitaxy part, specifically, when battery charging is abnormal to deform, support plate is arranged to With the slab construction of 12 face of epitaxy part, on the one hand restriction effect can be played to the movement of welded plate 1, make welded plate 1 unlikely It is in contact in box hat 6, on the other hand can also plays the role of support to welded plate 1, when ensures that 1 stress of welded plate deforms Stability.

Preferably, between safety valve 2 and welded plate 1 by laser welding, since laser weld energy density is big, during effect Between it is short, heat affected area and deform it is small, so the deflection of junction between safety valve 2 and welded plate 1 can be reduced, and intensity It is high.

The above-mentioned cap assembly for battery is had according to the battery of the utility model second aspect embodiment, due to above-mentioned Cap assembly has simple in structure, and design is reasonable, securely and reliably, the advantages that thickness is small.Therefore, according to the utility model embodiment Battery there is the advantages that production cost is low, and security performance is high, and space availability ratio is high, and battery capacity is big.

In the description of the utility model, it is to be understood that term " on ", " upper end ", " under ", the instruction such as " lower end " Orientation or position relationship, be for only for ease of description the utility model and simplify describe, rather than instruction or imply shown in Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that new to this practicality The limitation of type.

In addition, term " first ", " second " are only used for description purpose, and it is not intended that indicating or implying relatively important Property or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Person implicitly includes one or more this feature.In the description of the utility model, " multiple " are meant that two or two More than a, unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that fisrt feature is directly contacted with second feature, or the first and second features pass through intermediary mediate contact.

In the utility model, unless otherwise clearly defined and limited, the art such as term " connected ", " connection ", " fixation " Language should broadly understood, for example, it may be being fixedly connected or being detachably connected, or be integrally formed；Can be machinery Connection；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements or two The interaction relationship of a element.For the ordinary skill in the art, above-mentioned art can be understood as the case may be Concrete meaning of the language in the utility model.

In the description of the specification of the utility model, reference term " one embodiment ", " some embodiments " etc. are retouched State and mean that combining the embodiment or example particular features, structures, materials, or characteristics described is contained in the utility model extremely In few one embodiment or example.In the present specification, schematic expression of the above terms is necessarily directed to identical Embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more implementations Combined in an appropriate manner in example or example.In addition, without conflicting with each other, those skilled in the art can be by this Different embodiments or example and different embodiments or exemplary feature described in specification are combined and combine.

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (10)

1. a kind of cap assembly for battery, the battery includes positive plate, negative plate, membrane, box hat (6) and block group Part, the positive plate are spaced in the box hat (6) successively with the negative plate, and the membrane is located at positive plate and is born with described Between pole piece, the cap assembly is arranged on the upper end of the battery, and the upper end bending of the box hat (6), suitable for described in fixation Cap assembly, it is characterised in that the cap assembly includes：

Welded plate (1), the welded plate (1) include accommodating chamber (11) and prolong along the outside level of the accommodating chamber (11) periphery wall The epitaxy part (12) stretched；

Safety valve (2), the safety valve (2) are concave shape structure, including lower cavity part (21) with from the lower cavity part (21) periphery The outwardly extending first connecting portion of wall (22), the safety valve (2) is by being welded to connect in the welded plate (1) upper end；

Head cover (3), the head cover (3) are convex form structure, including upper cavity part (31) with from the upper cavity part (31) periphery wall to The second connecting portion (32) of outer extension, the safety valve (2) are oppositely arranged with the head cover (3) and limit airtight chamber jointly, And it is connected between the first connecting portion (22) and the second connecting portion (32) by soldering；And

First cushion rubber (4), first cushion rubber (4) are insulating part, internal arranged on the box hat (6), to obstruct the box hat (6) connection between the welded plate (1), the safety valve (2) and the head cover (3).

2. the cap assembly according to claim 1 for battery, it is characterised in that the second cushion rubber (5) is further included, it is described Second cushion rubber (5) is equipped with cavernous structure insulating part for centre, and arranged between the welded plate (1) and the safety valve (2).

3. the cap assembly according to claim 2 for battery, it is characterised in that second cushion rubber (5) includes the One ring portion (51), the second ring portion (52) and the 3rd ring portion (53), first ring portion (51) are the circular knot equipped with looping pit Structure, second ring portion (52) are integrally formed in the outer of first ring portion (51), and perpendicular to first ring portion (51), 3rd ring portion (53) is integrally formed in the upper end edge of second ring portion (52), and the 3rd ring portion (53) is perpendicular to institute State the second ring portion (52).

4. the cap assembly according to claim 3 for battery, it is characterised in that second ring portion (52) is equipped with Second raised (521), described second raised (521) are cyclic structure, are set along the inner top side of second ring portion (52).

5. the cap assembly according to claim 2 for battery, it is characterised in that first cushion rubber (4) and described Second cushion rubber (5) is PP parts.

6. the cap assembly according to claim 1 for battery, it is characterised in that first cushion rubber (4) includes master Body portion (41) and the supporting part (42) for being integrally formed in the main part (41) lower end, the main part (41) are C-shaped configuration, institute Supporting part (42) is stated between the box hat (6) and the welded plate (1).

7. the cap assembly according to claim 6 for battery, it is characterised in that the inner edge of the main part (41) is set There are first raised (411), described first raised (411) are supported only on the lower face of the second connecting portion (32).

8. the cap assembly according to claim 6 for battery, it is characterised in that the supporting part (42) is tablet knot Structure, arranged on the lower end of the welded plate (1), suitable for the epitaxy part (12) face.

9. the cap assembly according to claim 1 for battery, it is characterised in that the safety valve (2) and the weldering Fishplate bar passes through laser welding between (1).

10. a kind of battery, it is characterised in that including the use according to any one of claim 1 to claim 9 claim In the cap assembly of battery.