CN209087921U - Cap assembly and secondary cell - Google Patents
Cap assembly and secondary cell Download PDFInfo
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- CN209087921U CN209087921U CN201822028451.2U CN201822028451U CN209087921U CN 209087921 U CN209087921 U CN 209087921U CN 201822028451 U CN201822028451 U CN 201822028451U CN 209087921 U CN209087921 U CN 209087921U
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- pole
- secondary cell
- conduct piece
- rotating sheet
- lamina tecti
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to battery technology field more particularly to a kind of cap assembly and secondary cell, which is applied to secondary cell, including lamina tecti；First pole component, insulation set is on lamina tecti；Second pole component is arranged on lamina tecti, and the first pole component and/or the second pole component are equipped with gas vent；The fusing point of first seal, seal vents and first seal is lower than the fusing point of lamina tecti, and when secondary cell local environment temperature increases, first seal occurs to melt to open gas vent；Roll-over unit is arranged on lamina tecti, and when secondary cell air pressure inside increases, deformation occurs for roll-over unit, so that the first pole component is electrically connected by roll-over unit with the second pole component.Cap assembly provided by the utility model is able to solve the problem that overcharges of secondary cell under normal temperature condition, while the gas generated inside secondary cell can also be discharged in time under high temperature environment.
Description
Technical field
The utility model relates to battery technology field more particularly to a kind of cap assemblies and secondary cell.
Background technique
In recent years, the appearance of new-energy automobile gives a pushing effect on social development and environmental protection.
Power resources of the secondary cell as new-energy automobile have ensured that new-energy automobile being capable of normally travel.Secondary cell is different from
One-shot battery is that it can be repeated charging and discharging, but heat and gas can be sharply generated when secondary cell overcharges,
And then the security risks such as secondary cell kindling or explosion may be caused.Therefore, in order to prevent secondary cell due to overcharging when draw
Kindling and explosion are played, can use and shorting members are set on the cap assembly of secondary cell.Shorting members can will be in shell
The positive plate and negative electrode tab of electrode assembly carry out short circuit, to ensure the safety of secondary cell.
Although the shorting members of secondary cell have above-mentioned advantage, however, above-mentioned component can reduce secondary cell reply
The ability of hot environment, such as when coping with hot tank (Hot-Box) test, it is under high temperature environment, not only internal in secondary cell
Air pressure can increase with the decomposition of electrolyte at high temperature, and the internal resistance of electrode assembly also will increase；At this time if short circuit
Component makes secondary cell form external short circuit, and electrode assembly can be since the increase of its internal resistance be so that fuse (fuse) cannot be timely
It disconnects, meanwhile, the presence of short circuit current will generate bigger heat, to aggravate the risk that secondary cell is on fire, explodes, exist
The technical issues of increasing thermal runaway probability under high temperature environment.
Utility model content
The purpose of this utility model is to provide a kind of cap assembly and secondary cells, in the prior art secondary to alleviate
Battery there is technical issues that increase thermal runaway under high temperature environment.
The utility model provides a kind of cap assembly, is applied to secondary cell, comprising:
Lamina tecti:
First pole component, insulation set is on the lamina tecti；
Second pole component is arranged on the lamina tecti, and first pole component and/or the second pole group
Part is equipped with gas vent, and the gas vent is arranged to be connected to the inside of the secondary cell；
First seal, the fusing point for sealing the gas vent and the first seal are lower than the fusing point of the lamina tecti,
When the secondary cell local environment temperature increases, the first seal occurs to melt to open the gas vent；
Roll-over unit is arranged on the lamina tecti, when the secondary cell air pressure inside increases, the roll-over unit
Deformation occurs, so that first pole component is electrically connected by the roll-over unit with second pole component.
Further, first pole component includes:
First pole ontology；
The outside of the secondary cell is arranged in first conduct piece, wherein the first pole ontology and described first is led
Electric part is with the lamina tecti insulation set, and first conduct piece is electrically connected with the first pole ontology；
Second pole component includes:
Second pole ontology, is electrically connected with the lamina tecti；
The roll-over unit includes:
First rotating sheet is oppositely arranged with first conduct piece, described when the secondary cell air pressure inside increases
Deformation occurs for first rotating sheet, so that first conduct piece is electrically connected by first rotating sheet and the second pole ontology
It connects.
Further, first pole component includes:
First pole ontology；
The outside of the secondary cell is arranged in first conduct piece, wherein the first pole ontology and described first is led
Electric part is with the lamina tecti insulation set, and first conduct piece is electrically connected with the first pole ontology；
Second pole component includes:
The outside of the secondary cell is arranged in second conduct piece, wherein second conduct piece by resistance with it is described
Lamina tecti electrical connection；
Second pole ontology is electrically connected with second conduct piece；
The roll-over unit includes:
First rotating sheet and the second rotating sheet, first rotating sheet are oppositely arranged with first conduct piece, and described
Two rotating sheets are oppositely arranged with second conduct piece,
When the secondary cell air pressure inside increases, shape occurs for first rotating sheet and second rotating sheet
Become, so that first conduct piece is electrically connected by first rotating sheet, the realization of the second rotating sheet with second conduct piece.
Further, first pole component includes:
First pole ontology；
The outside of the secondary cell is arranged in first conduct piece, wherein the first pole ontology and described first is led
Electric part is with the lamina tecti insulation set, and first conduct piece is electrically connected with the first pole ontology；
Second pole component includes:
The outside of the secondary cell is arranged in second conduct piece；
Second pole ontology is electrically connected with second conduct piece, and the second pole ontology and second conduction
Part with the lamina tecti insulation set；
The roll-over unit includes:
First rotating sheet and the second rotating sheet, first rotating sheet are oppositely arranged with first conduct piece, and described
Two rotating sheets are oppositely arranged with second conduct piece,
When the secondary cell air pressure inside increases, shape occurs for first rotating sheet and second rotating sheet
Become, so that first conduct piece is electrically connected by first rotating sheet, the realization of the second rotating sheet with second conduct piece.
Further, the first pole ontology and/or the second pole ontology are cavity structure, the gas vent pair
The top of the cavity structure should be set.
Further, the material of the first seal is plastics, and the melting range of the first seal is 85 DEG C
~150 DEG C.
Further, the first seal is equipped with indentation, and the bottom side of the secondary cell is directed toward along the lamina tecti
To projection, the projection of the indentation is located in the projection of the gas vent.
Further, further includes:
Second seal is set on the first pole ontology and the second pole ontology,
The second seal is arranged to seal the first pole ontology and the second pole ontology and the top cover
Gap between plate.
The utility model has the following beneficial effects:
The utility model provides a kind of cap assembly, which includes lamina tecti, insulation set on lamina tecti
First pole component, the second pole component being arranged on lamina tecti, the first seal of seal vents and setting are in top cover
Roll-over unit on plate, wherein the first pole component and/or the second pole component are equipped with gas vent, and gas vent be arranged to
The inside of secondary cell is connected to, and the fusing point of first seal is lower than the fusing point of lamina tecti, specifically, working as secondary cell local environment
When temperature increases, first seal occurs to melt to open gas vent, also, when secondary cell air pressure inside increases, overturning
Deformation occurs for unit, so that the first pole component is electrically connected by roll-over unit with the second pole component.In secondary cell room temperature
When overcharging, at this point, the pressure inside secondary cell is more than scheduled threshold value, since the lamina tecti is equipped with roll-over unit,
Roll-over unit inside secondary cell compared with atmospheric pressure under the action of deformation occurs so that the first pole component by roll-over unit with
Second pole component electrical connection, thus by the electrode assembly short circuit of secondary cell to solve the problems, such as to overcharge；Meanwhile it due also to should
The first pole component and/or the second pole component of cap assembly are equipped with gas vent, wherein the first sealing is equipped on gas vent
Part, also, the fusing point of first seal is lower than the fusing point of lamina tecti, when secondary cell carries out hot tank test, secondary cell
Ambient temperature is higher, at this point, first seal can occur to melt before roll-over unit is not overturn to open gas vent, in turn
Gas inside secondary cell is discharged into external environment, to reduce the risk that thermal runaway occurs for secondary cell, is avoided
Battery core is on fire, situations such as exploding, and improves the ability of secondary cell reply hot environment, specific high reliablity, safety
The high feature of property.
The utility model provides a kind of secondary cell, comprising:
Shell has opening；
Electrode assembly is placed in the shell, and the electrode assembly is including the first pole piece, the second pole piece and is located at institute
State the diaphragm between the first pole piece and the second pole piece；With
Cap assembly described above, the lamina tecti lid close the opening in the shell；
The first pole ontology is electrically connected with first pole piece, the second pole ontology and second pole piece electricity
Connection.
Further, further includes:
Adapter is connected between second pole piece and the second pole ontology；
Current interrupter is arranged on the adapter, and the current interrupter is arranged in the first pole ontology
It is disconnected in the case where being powered with the second pole ontology.
The utility model has the following beneficial effects:
The secondary cell is identical as advantage possessed by above-mentioned cap assembly, and details are not described herein.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is that cap assembly provided by the embodiment of the utility model is mounted on the structural schematic diagram on secondary cell shell；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3 is the explosive view that cap assembly provided by the embodiment of the utility model is equipped with a rotating sheet；
Fig. 4 is the explosive view that cap assembly provided by the embodiment of the utility model is equipped with two rotating sheets.
Icon:
1- lamina tecti；
The first pole component of 2-；
21- gas vent；
22- the first pole ontology；
The first conduct piece of 23-；
The second pole component of 3-；
31- the second pole ontology；
The second conduct piece of 32-；
4- first seal；
5- roll-over unit；
The first rotating sheet of 51-；
The second rotating sheet of 52-；
6- second seal；
7- shell；
8- electrode assembly；
The first pole piece of 81-；
The second pole piece of 82-；
9- adapter；
10- insulating part；
11- explosion-proof valve.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "inner", "outside"
To be based on the orientation or positional relationship shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitations of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Fig. 1 is the overall structure diagram of secondary cell in the present embodiment, and secondary cell includes shell 7, is placed in shell 7
Interior multiple battery cores, the electrolyte (not shown) being poured into shell 7, wherein each battery core includes electrode assembly 8, electrode
Component 8 includes the first pole piece 81, the second pole piece 82 and the diaphragm between the first pole piece 81 and the second pole piece 82.Lamina tecti
1 is equipped with the first pole ontology 22 and the second pole ontology 31, and the first pole ontology 22 is electrically connected with the first pole piece 81, the second pole
Column ontology 31 is electrically connected with the second pole piece 82.Battery core component is by by the first pole piece 81, the second pole piece 82 and partition spiral shell together
Circumvolution around and formed.Partition is the insulator between the first pole piece 81, the second pole piece 82.Shell 7 is configured to cube
Shape, to form the space (or cavity) for accommodating battery core component inside it, and shell 7 has opening in side, with
Allow to lead to the inner space (or being connected to the inner space).Further, in the present embodiment, secondary cell further includes connecting
The adapter 9 being connected between the second pole piece 82 and the second pole ontology 31 and the current interrupter being arranged on adapter 9, electricity
Stream relay is arranged to disconnect in the case where the first pole ontology 22 and the second pole ontology 31 are powered.
Wherein, the first pole and the second pole may respectively be Positive Poles or negative pole, specifically, in the present embodiment
In, when the first pole is negative pole, the second pole is Positive Poles.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of cap assembly is present embodiments provided, which includes top cover
The first pole component 2 on lamina tecti 1 of plate 1, insulation set, the second pole component 3 being arranged on lamina tecti 1, sealing row
The first seal 4 of stomata 21 and the roll-over unit 5 being arranged on lamina tecti 1, wherein the first pole component 2 and/or the second pole
Column assembly 3 is equipped with gas vent 21, and gas vent 21 is arranged to be connected to the inside of secondary cell, and the fusing point of first seal 4 is low
In the fusing point of lamina tecti 1, specifically, first seal 4 occurs to melt to open when secondary cell local environment temperature increases
Gas vent 21, also, when secondary cell air pressure inside increases, deformation occurs for roll-over unit 5, so that the first pole component 2 is logical
Roll-over unit 5 is crossed to be electrically connected with the second pole component 3.When secondary cell room temperature overcharges, at this point, the pressure inside secondary cell
More than scheduled threshold value, since the lamina tecti 1 is equipped with roll-over unit 5, roll-over unit 5 is larger inside secondary cell
Deformation occurs under the action of air pressure, so that the first pole component 2 is electrically connected by roll-over unit 5 with the second pole component 3, thus
By 8 short circuit of electrode assembly of secondary cell to solve the problems, such as to overcharge；Meanwhile due also to the cap assembly the first pole component
2 and/or second pole component 3 be equipped with gas vent 21, wherein first seal 4 is equipped on gas vent 21, also, first is close
The fusing point of sealing 4 is lower than the fusing point of lamina tecti 1, and when secondary cell carries out hot tank test, the ambient temperature of secondary cell is higher,
At this point, first seal 4 can occur to melt to open gas vent 21 before roll-over unit 5 is not overturn, and then by secondary electricity
Gas inside pond is discharged into external environment, to reduce the risk that thermal runaway occurs for secondary cell, is avoided battery core and is risen
Fire, situations such as explode improve the ability that secondary cell copes with hot environment, specific high reliablity, highly-safe spy
Point.
In the present embodiment, the first seal 4 of seal vents 21 has the fusing point lower than lamina tecti 1, further,
The material of first seal 4 can be (PPpolypropylene, polypropylene), (PEpolyethylene, polyethylene) etc..Tool
Body, the melting range of first seal 4 can be 85 DEG C -150 DEG C.Wherein, when secondary cell local environment temperature is more than the
After the fusing point of one sealing element 4, fusing or ruckbildung, first seal 4 at this time, which can then occur, for first seal 4 can then take off
From the sealing state with gas vent 21, so that gas vent 21 be made to be opened, the gas inside secondary cell can then pass through exhaust
Hole 21 is discharged outside in environment.
Wherein, coping plate is in lamellar, and lamina tecti 1 can be made of metal material, specifically, lamina tecti 1 can be with
For metal material identical with secondary cell shell 7, for example, the materials such as aluminium, steel.
As shown in Figure 1, it is further, it is as depicted in figs. 1 and 2, in the present embodiment, explosion-proof there are also being equipped on lamina tecti 1
Valve 11, when secondary cell overcharges, over-discharge or battery overheat and generating gas keeps the internal pressure of secondary cell excessive
When, explosion-proof valve 11 can be corrupted such that the gas being formed in inside secondary cell is discharged into external environment, thus prevent two
Primary cell explosion.
Wherein, in the present embodiment, since first seal 4 is plastic foil, when the explosion-proof valve 11 on lamina tecti 1 fails
When, the bulk gas that secondary cell overcharges, over-discharge or battery are overheated and generated can wash first seal 4 open,
Thus explosion-proof valve 11 is substituted so that the gas inside secondary cell to be discharged into external environment.
As shown in Figure 1, Figure 2 and Figure 3, wherein the first pole component 2 includes the first pole ontology 22, is arranged in secondary electricity
First conduct piece 23 of the outside in pond, wherein the first pole ontology 22 and the first conduct piece 23 with 1 insulation set of lamina tecti,
And first conduct piece 23 be electrically connected with the first pole ontology 22.Second pole component 3 includes the second pole being electrically connected with lamina tecti 1
Column ontology 31, in the present embodiment, due to the first pole ontology 22 and 1 insulation set of lamina tecti, the second pole ontology 31 and top
Cover board 1 is electrically connected, i.e., only has a pole ontology electrical connection on lamina tecti 1, specifically, roll-over unit 5 includes and the first conduction
The first rotating sheet 51 that part 23 is oppositely arranged, wherein when secondary cell air pressure inside increases, shape occurs for the first rotating sheet 51
Become, so that the first conduct piece 23 is electrically connected by the first rotating sheet 51 with the second pole ontology 31, passes through first rotating sheet
51 can realize make when secondary cell room temperature overcharges electrode assembly 8 short circuit to solve the problems, such as to overcharge.
As shown in Figure 2, wherein the cap assembly also has another middle design structure, specifically, the first pole component 2 is wrapped
It includes the first pole ontology 22 and the first conduct piece 23 of the outside of secondary cell is set, wherein the first pole ontology 22 and the
One conduct piece 23 is with 1 insulation set of lamina tecti, and the first conduct piece 23 is electrically connected with the first pole ontology 22；Second pole group
Part 3 includes the second pole ontology that the second conduct piece 32 of the outside of secondary cell is arranged in and is electrically connected with the second conduct piece 32
31, and the second pole ontology 31 and the second conduct piece 32, with 1 insulation set of lamina tecti, further, roll-over unit 5 includes the
One rotating sheet 51 and the second rotating sheet 52, the first rotating sheet 51 are oppositely arranged with the first conduct piece 23, the second rotating sheet 52 and
Two conduct pieces 32 are oppositely arranged, and when secondary cell air pressure inside increases, the first rotating sheet 51 and the second rotating sheet 52 occur
Deformation, so that the first conduct piece 23 is electrically connected by the first rotating sheet 51, the realization of the second rotating sheet 52 with the second conduct piece 32, with
Unlike the mode of above-mentioned one rotating sheet of setting, in the present embodiment, due to the first pole ontology 22 and the second pole sheet
Body 31 is with 1 insulation set of lamina tecti, and therefore, such design method needs two rotating sheets, i.e. the first rotating sheet 51 and second
Rotating sheet 52, but realize effect be equipped with first rotating sheet 51 be it is the same, details are not described herein.
Wherein, two rotating sheets are arranged on lamina tecti 1, and there are also another structure designs, specifically, the first pole component 2
The first conduct piece 23 including the first pole ontology 22 and the outside that secondary cell is arranged in, wherein 22 He of the first pole ontology
First conduct piece 23 is with 1 insulation set of lamina tecti, and the first conduct piece 23 is electrically connected with the first pole ontology 22；Second pole
Component 3 includes the second pole sheet that the second conduct piece 32 of the outside of secondary cell is arranged in and is electrically connected with the second conduct piece 32
Body 31, wherein the second conduct piece 32 is electrically connected by resistance with lamina tecti 1；Roll-over unit 5 includes the first rotating sheet 51 and second
Rotating sheet 52, the first rotating sheet 51 are oppositely arranged with the first conduct piece 23, and the second rotating sheet 52 is set relatively with the second conduct piece 32
It sets, when secondary cell air pressure inside increases, deformation occurs for the first rotating sheet 51 and the second rotating sheet 52, so that first is conductive
Part 23 is electrically connected by the first rotating sheet 51, the realization of the second rotating sheet 52 with the second conduct piece 32.Such design method be equipped with
The effect of one the first rotating sheet 51 be it is the same, details are not described herein.
In addition to this, the second conduct piece 32 is electrically connected with coping plate due to resistance, the metal shell 7 and coping plate of battery
To conduct, therefore, the second conduct piece 32 and shell 7 are electrically connected with the second pole ontology 31 of secondary cell.When secondary electricity
When pond is by drift bolt situation, gas will not be generated inside secondary cell, in order to guarantee that drift bolt point will not be on fire, the electricity of protective loop
Stream is answered smaller, needs the resistance value of resistance bigger.It should be noted that in order to which the resistance of meet demand resistance value, resistance is arranged
Number it is unrestricted, can be set one, also can be set multiple, specifically quantity can be arranged according to actual needs.
Further, the first rotating sheet 51 and the second rotating sheet 52 and lamina tecti 1 can by it is be bonded, the modes such as be clamped and connect
It is connected together, it is in the present embodiment, secured for that can ensure that the first rotating sheet 51 and the second rotating sheet 52 are connect with lamina tecti 1
Property, it is preferable that the first rotating sheet 51 and the second rotating sheet 52 are welded on the mounting hole of lamina tecti 1.
As shown in Figure 2, Figure 3 and Figure 4, meanwhile, for realize the first conduct piece 23 and the second conduct piece 32 and lamina tecti 1 it
Between insulation set, can between the first conduct piece 23 and lamina tecti 1 between the second conduct piece 32 and lamina tecti 1 be arranged insulation
Part 10, insulating part 10 can be the insulation performances such as (PPpolypropylene, polypropylene), (PEpolyethylene, polyethylene)
Good material is made, wherein the first conduct piece 23 and the second conduct piece 32 can be connected to insulation by the modes such as being bonded, being clamped
On part 10, to can be improved the fastness connected between the first conduct piece 23 and the second conduct piece 32 and insulating part 10, it is preferable that the
One conduct piece 23 and the second conduct piece 32 are molded together with insulating part 10.
Shown in as shown in Figure 1, Figure 3 and Figure 4, specifically, when secondary cell overcharges, to ensure the gas inside secondary cell
Body can smoothly be discharged along gas vent 21, and the first pole ontology 22 and/or the second pole ontology 31 are cavity structure, gas vent
21 are correspondingly arranged at the top of cavity structure, wherein the first pole ontology 22 and/or the second pole ontology 31 and first seal
4 can be linked together by the modes such as being bonded, being clamped, and be the leakproofness that can ensure gas vent 21, in the present embodiment, excellent
Selection of land, the first pole ontology 22 and/or the second pole ontology 31 and 4 integrated injection molding of first seal.
Further, in the present embodiment, the material of first seal 4 is plastics, for that can be processed convenient for technique, first
Sealing element 4 can be the plastic foils such as rectangular, round, triangle, and to ensure that sealing will be by inside secondary cell
Gas is washed open, and indentation is equipped in first seal 4, wherein the shape of indentation can be the shapes such as " V " type, U-typed.Also,
To ensure that, when secondary cell overcharges, first seal 4 can be opened in time, to ensure the gas energy inside secondary cell
It is enough discharged in external environment, the bottom direction projection of secondary cell is directed toward along lamina tecti 1, the projection of indentation is located at gas vent 21
In projection.
As shown in Figure 3 and Figure 4, as shown in Figures 2 and 3, wherein the first pole ontology 22 and the second pole ontology 31 can be with
Directly through lamina tecti 1, in the present embodiment, for the sealing performance for ensureing lamina tecti 1, the stability and peace of secondary cell are ensured
Quan Xing, specifically, the cap assembly further includes the second sealing being set on the first pole ontology 22 and the second pole ontology 31
Part 6, second seal 6 are arranged to seal the gap between the first pole ontology 22 and the second pole ontology 31 and coping plate.
Wherein, second seal 6 can be silica gel, nylon, polyurethane, engineering plastics etc., in the present embodiment, ensure
While second seal 6 has sealing performance, also guarantee second seal 6 has preferable deformation behavior, second seal 6
It can be made of rubber material.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of cap assembly is applied to secondary cell characterized by comprising
Lamina tecti (1):
First pole component (2), insulation set is on the lamina tecti (1)；
Second pole component (3) is arranged on the lamina tecti (1), and first pole component (2) and/or described second
Pole component (3) is equipped with gas vent (21), and the gas vent (21) is arranged to be connected to the inside of the secondary cell；
First seal (4), the fusing point for sealing the gas vent (21) and the first seal (4) are lower than the lamina tecti
(1) fusing point, when the secondary cell local environment temperature increases, the first seal (4) occurs to melt to open
State gas vent (21)；
Roll-over unit (5) is arranged on the lamina tecti (1), and when the secondary cell air pressure inside increases, the overturning is single
First (5) deformation occurs, so that first pole component (2) passes through the roll-over unit (5) and second pole component (3)
Electrical connection.
2. cap assembly according to claim 1, which is characterized in that first pole component (2) includes:
First pole ontology (22)；
First conduct piece (23), is arranged in the outside of the secondary cell, wherein the first pole ontology (22) and described
One conduct piece (23) with the lamina tecti (1) insulation set, and first conduct piece (23) and the first pole ontology
(22) it is electrically connected；
Second pole component (3) includes:
Second pole ontology (31), is electrically connected with the lamina tecti (1)；
The roll-over unit (5) includes:
First rotating sheet (51) is oppositely arranged with first conduct piece (23), when the secondary cell air pressure inside increases,
Deformation occurs for first rotating sheet (51) so that first conduct piece (23) by first rotating sheet (51) with it is described
The electrical connection of second pole ontology (31).
3. cap assembly according to claim 1, which is characterized in that first pole component (2) includes:
First pole ontology (22)；
First conduct piece (23), is arranged in the outside of the secondary cell, wherein the first pole ontology (22) and described
One conduct piece (23) with the lamina tecti (1) insulation set, and first conduct piece (23) and the first pole ontology
(22) it is electrically connected；
Second pole component (3) includes:
Second conduct piece (32), is arranged in the outside of the secondary cell, wherein second conduct piece (32) by resistance with
Lamina tecti (1) electrical connection；
Second pole ontology (31) is electrically connected with second conduct piece (32)；
The roll-over unit (5) includes:
First rotating sheet (51) and the second rotating sheet (52), first rotating sheet (51) and first conduct piece (23) are opposite
Setting, second rotating sheet (52) are oppositely arranged with second conduct piece (32),
When the secondary cell air pressure inside increases, first rotating sheet (51) and second rotating sheet (52) occur
Deformation, so that first conduct piece (23) is realized and described the by first rotating sheet (51), the second rotating sheet (52)
Two conduct pieces (32) electrical connection.
4. cap assembly according to claim 1, which is characterized in that first pole component (2) includes:
First pole ontology (22)；
First conduct piece (23), is arranged in the outside of the secondary cell, wherein the first pole ontology (22) and described
One conduct piece (23) with the lamina tecti (1) insulation set, and first conduct piece (23) and the first pole ontology
(22) it is electrically connected；
Second pole component (3) includes:
Second conduct piece (32), is arranged in the outside of the secondary cell；
Second pole ontology (31) is electrically connected with second conduct piece (32), and the second pole ontology (31) and described
Second conduct piece (32) with the lamina tecti (1) insulation set；
The roll-over unit (5) includes:
First rotating sheet (51) and the second rotating sheet (52), first rotating sheet (51) and first conduct piece (23) are opposite
Setting, second rotating sheet (52) are oppositely arranged with second conduct piece (32),
When the secondary cell air pressure inside increases, first rotating sheet (51) and second rotating sheet (52) occur
Deformation, so that first conduct piece (23) is realized and described the by first rotating sheet (51), the second rotating sheet (52)
Two conduct pieces (32) electrical connection.
5. according to the described in any item cap assemblies of claim 2-4, which is characterized in that the first pole ontology (22) and/
Or the second pole ontology (31) is cavity structure, the gas vent (21) is correspondingly arranged at the top of the cavity structure.
6. cap assembly according to claim 1-4, which is characterized in that the material of the first seal (4)
For plastics, and the melting range of the first seal (4) is 85 DEG C~150 DEG C.
7. cap assembly according to claim 6, which is characterized in that the first seal (4) is equipped with indentation, along described
Lamina tecti (1) is directed toward the bottom direction projection of the secondary cell, and the projection of the indentation is located at the throwing of the gas vent (21)
In shadow.
8. according to the described in any item cap assemblies of claim 2-4, which is characterized in that further include:
Second seal (6) is set on the first pole ontology (22) and the second pole ontology (31),
The second seal (6) is arranged to seal the first pole ontology (22) and the second pole ontology (31) and institute
State the gap between lamina tecti (1).
9. a kind of secondary cell characterized by comprising
Shell (7) has opening；
Electrode assembly (8) is placed in the shell (7), and the electrode assembly (8) includes the first pole piece (81), the second pole piece
(82) and the diaphragm between first pole piece (81) and the second pole piece (82)；With
The described in any item cap assemblies of claim 1-8, lamina tecti (1) lid close the opening in the shell (7)；
The first pole ontology (22) is electrically connected with first pole piece (81), the second pole ontology (31) and described the
Two pole pieces (82) electrical connection.
10. secondary cell according to claim 9, which is characterized in that further include:
Adapter (9) is connected between second pole piece (82) and the second pole ontology (31)；
Current interrupter is arranged on the adapter (9), and the current interrupter is arranged in the first pole ontology
(22) and in the case that the second pole ontology (31) is powered break.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822028451.2U CN209087921U (en) | 2018-12-05 | 2018-12-05 | Cap assembly and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822028451.2U CN209087921U (en) | 2018-12-05 | 2018-12-05 | Cap assembly and secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209087921U true CN209087921U (en) | 2019-07-09 |
Family
ID=67126391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822028451.2U Active CN209087921U (en) | 2018-12-05 | 2018-12-05 | Cap assembly and secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209087921U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865230A (en) * | 2022-05-19 | 2022-08-05 | 天能新能源(湖州)有限公司 | Novel protection sheet and lithium battery cover plate containing same |
| CN115498354A (en) * | 2022-11-14 | 2022-12-20 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
| CN118017168A (en) * | 2024-04-10 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | Battery monomer, battery and power consumption device |
-
2018
- 2018-12-05 CN CN201822028451.2U patent/CN209087921U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865230A (en) * | 2022-05-19 | 2022-08-05 | 天能新能源(湖州)有限公司 | Novel protection sheet and lithium battery cover plate containing same |
| CN115498354A (en) * | 2022-11-14 | 2022-12-20 | 宁德新能源科技有限公司 | Electrochemical device and electricity utilization device |
| CN115498354B (en) * | 2022-11-14 | 2023-03-03 | 宁德新能源科技有限公司 | Electrochemical device and power utilization device |
| CN118017168A (en) * | 2024-04-10 | 2024-05-10 | 宁德时代新能源科技股份有限公司 | Battery monomer, battery and power consumption device |
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