CN106374061A - Top cover structure of power battery - Google Patents
Top cover structure of power battery Download PDFInfo
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- CN106374061A CN106374061A CN201611042618.XA CN201611042618A CN106374061A CN 106374061 A CN106374061 A CN 106374061A CN 201611042618 A CN201611042618 A CN 201611042618A CN 106374061 A CN106374061 A CN 106374061A
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- short
- circuit part
- coping plate
- electrode assembly
- pole
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- 230000010485 coping Effects 0.000 claims description 131
- 238000004891 communication Methods 0.000 claims description 29
- 230000009471 action Effects 0.000 claims description 28
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 10
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to an energy storage device field especially relates to a power battery top cap structure, including top cap piece, two electrode subassembly and two short circuit part, two at least one in the electrode subassembly with the top cap piece is insulating to be set up, two at least one in the short circuit part is fixed on the electrode subassembly, when power battery internal pressure surpassed reference pressure, two the short circuit part homoenergetic is enough to move under the pressure effect, and makes every the electrode subassembly can pass through one respectively the short circuit part with the top cap piece electricity is connected. The power battery top cap structure that this application embodiment provided can avoid short circuit part to lead to sensitivity and life-span to reduce because of the stress that receives the top cap piece.
Description
Technical field
The application is related to energy storage device field, more particularly, to a kind of top cover structure of power battery.
Background technology
Electric automobile and energy-accumulating power station etc. generally require to be used has jumbo electrokinetic cell as power supply.These power
Battery, except having high power capacity, also should have good safety and longer cycle life etc., can be only achieved the mark of use
Demand that is accurate and meeting people.
In prior art, when electrokinetic cell overcharges, the electrolyte decomposition of electrokinetic cell can make to produce inside electrokinetic cell
Excessive heat causes battery catches fire, or the increase of electrokinetic cell internal pressure can be made to lead to battery explosion (as long as electrokinetic cell is not
Stop charging, internal pressure can increase always, until exploding).Therefore before electrokinetic cell is out of control, need by means of one
Individual external short circuit structure is cutting off the connection of (or between negative lug and negative pole pole) between positive pole ear and Positive Poles
Part, thus stop electrokinetic cell from continuing to charge.
In correlation technique, external short circuit part is generally using contact sheet form, and, contact chip typically can directly be arranged
On coping plate, because coping plate is subject to external influence factor more, for example, electrokinetic cell inevitably produces during using
Raw expansion, and coping plate covers housing by welding, housing outward expansion can produce tension, or top cover simultaneously to coping plate
Welding tension etc. can be produced to coping plate when piece and case weld, because contact chip is to be set directly on coping plate, because
This contact chip also can produce tension.Contact chip is chronically at the state of tension, can produce stress fatigue to contact chip, shorten
The service life of contact chip；Simultaneously because the presence of tension can lead to contact chip sensitivity to decline, contact chip cannot be specified
Action under pressure, so that the security performance of electrokinetic cell reduces.
Content of the invention
This application provides a kind of top cover structure of power battery, can solve the problem that the problems referred to above.
The embodiment of the present application provides a kind of top cover structure of power battery, including coping plate, two electrode assemblies and two
Individual short-circuit part,
At least one of two described electrode assemblies and described coping plate insulation set, in two described short-circuit parts
At least one is fixed on described electrode assemblie,
When electrokinetic cell internal pressure exceedes reference pressure, two described short-circuit parts all can move under pressure
Make, and make each described electrode assemblie be able to electrically connect with described coping plate by a described short-circuit part.
Preferably, two described electrode assemblies are respectively first electrode assembly and second electrode assembly, and two described short
Circuit unit is respectively the first short-circuit part and the second short-circuit part,
Described first short-circuit part is located at the lower section of described coping plate, and is fixed on described first electrode assembly, described
Can contact with described coping plate after first short-circuit part action, the sky between described first short-circuit part and described coping plate
Between seal.
Preferably, described first electrode assembly includes the first pole, the first extension and first seal,
The bottom of described first pole is located at the lower section of described coping plate, and the top of described first pole passes through described top cover
Piece, described first extending part is connected below described coping plate and with the bottom of described first pole,
First installing hole is provided with described first extension, described first short-circuit part seals described first installing hole,
And the space between described first short-circuit part and described coping plate is sealed by described first seal.
Preferably, described second short-circuit part is fixed on described coping plate, and can be with described second electrode after action
Attached components touch.
Preferably, described second electrode assembly includes the second pole and the second conducting block,
Described second pole pass through described coping plate, described second conducting block be located at described coping plate top, and with institute
State the second pole electrical connection,
Second installing hole is provided with described coping plate, described second mounting hole site in the lower section of described second conducting block,
Described second short-circuit part seals described second installing hole.
Preferably, described second electrode assembly includes the second pole, the second extension and second seal,
The bottom of described second pole is located at below described coping plate, and the top of described second pole passes through described top cover
Piece, described second extending part is connected below described coping plate and with the bottom of described second pole,
Second installing hole is provided with described second extension, described second short-circuit part seals described second installing hole,
And the space between described second short-circuit part and described coping plate is sealed by described second seal.
Preferably, also include resistance, described first electrode assembly is electrically connected with described coping plate by described resistance all the time,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and described second short-circuit part
All can action under pressure, and formed by described first electrode assembly through described first short-circuit part, described top cover
Piece, described second short-circuit part arrive at the first electrical communication path of described second electrode assembly, and are formed by the described first electricity
Pole assembly arrives at the second of described second electrode assembly and is electrically connected through described resistance, described coping plate, described second short-circuit part
Connect path.
Preferably, also include resistance, described second electrode assembly is electrically connected with described coping plate by described resistance all the time,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and described second short-circuit part
All can action under pressure, and formed by described first electrode assembly through described first short-circuit part, described top cover
Piece, described second short-circuit part arrive at the first electrical communication path of described second electrode assembly, and are formed by the described first electricity
Pole assembly arrives at the 3rd of described second electrode assembly and is electrically connected through described first short-circuit part, described coping plate, described resistance
Connect path.
Preferably, also include resistance, described first pole is electrically connected with described coping plate by described resistance,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and described second short-circuit part
All can action under pressure, and formed by described first electrode assembly through described first short-circuit part, described top cover
Piece, described second short-circuit part arrive at the first electrical communication path of described second electrode assembly, and are formed by the described first electricity
Pole assembly arrives at the second of described second electrode assembly and is electrically connected through described resistance, described coping plate, described second short-circuit part
Connect path.
Preferably, described first electrode assembly also includes the first conducting block, and described first conducting block is located at described coping plate
Top, and electrically connect with the top of described first pole, described top cover structure of power battery also includes resistance, and described first is conductive
Block is electrically connected with described coping plate by described resistance,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and described second short-circuit part
All can action under pressure, and formed by described first electrode assembly through described first short-circuit part, described top cover
Piece, described second short-circuit part arrive at the first electrical communication path of described second electrode assembly, and are formed by the described first electricity
Pole assembly arrives at the second of described second electrode assembly and is electrically connected through described resistance, described coping plate, described second short-circuit part
Connect path.
Preferably, described second electrode assembly also includes the second conducting block, and described second conducting block is located at described coping plate
Top, and electrically connect with the top of described second pole, described top cover structure of power battery also includes resistance, described second pole
Or described second conducting block is electrically connected with described coping plate by described resistance,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and described second short-circuit part
All can action under pressure, and formed by described first electrode assembly through described first short-circuit part, described top cover
Piece, described second short-circuit part arrive at the first electrical communication path of described second electrode assembly, and are formed by the described first electricity
Pole assembly arrives at the 3rd of described second electrode assembly and is electrically connected through described first short-circuit part, described coping plate, described resistance
Connect path.
The technical scheme that the embodiment of the present application provides can reach following beneficial effect:
The top cover structure of power battery that the embodiment of the present application is provided by short-circuit part is fixed on electrode assemblie, energy
Short-circuit part is enough avoided to lead to sensitivity and service life reduction because of the stress by coping plate.
It should be appreciated that above general description and detailed description hereinafter are only exemplary, can not be limited this
Application.
Brief description
Fig. 1 illustrates by first plan structure to the 4th top cover structure of power battery that embodiment is provided of the application
Figure；
The configuration schematic diagram of the top cover structure of power battery that Fig. 2 is provided by first embodiment of the application；
Fig. 3 is that structural representation is cutd open in the side of first embodiment of the application a-a in FIG；
The configuration schematic diagram of the top cover structure of power battery that Fig. 4 is provided by second embodiment of the application；
Fig. 5 is that structural representation is cutd open in the side of second embodiment of the application a-a in FIG；
Fig. 6 is that structural representation is cutd open in the side of the 3rd embodiment of the application a-a in FIG；
Fig. 7 is that structural representation is cutd open in the side of the 4th embodiment of the application a-a in FIG；
Fig. 8 illustrates by the plan structure of the 5th and the 6th top cover structure of power battery that embodiment is provided of the application
Figure；
Fig. 9 is the configuration schematic diagram of the 5th top cover structure of power battery that embodiment is provided of the application；
Figure 10 is that structural representation is cutd open in the side of the 5th embodiment of the application a-a in fig. 8；
Figure 11 is that structural representation is cutd open in the side of the 6th embodiment of the application a-a in fig. 8；
Structural representation is cutd open in the side of the electrokinetic cell that Figure 12 is provided by the embodiment of the present application.
Reference:
The naked battery core of 2-；
2a- positive pole ear；
2b- negative lug；
3- shell；
4- first connector；
5- second connector；
6- fusible member；
10- first electrode assembly；
100- first pole；
101- first insulating part；
102- the first electrode column sealing part；
103- first conducting block；
104- second insulating part；
105- first extension；
106- first seal；
107- first installing hole；
20- second electrode assembly；
200- second pole；
201- the 3rd insulating part；
202- the second electrode column sealing part；
203- second conducting block；
204- the 4th insulating part；
205- second extension；
206- second seal；
207- second installing hole；
30- first short-circuit part；
40- second short-circuit part；
50- coping plate；
60- resistance.
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement meeting the application
Example, and be used for explaining the principle of the application together with description.
Specific embodiment
Below by specific embodiment and combine accompanying drawing the application is described in further detail.Described in literary composition
"front", "rear", "left", "right", " on ", D score all with the top cover structure of power battery in accompanying drawing and electrokinetic cell as reference.
The embodiment of the present application provides a kind of electrokinetic cell, as shown in figure 12, including top cover structure of power battery, naked battery core
2nd, shell 3, the first connector 4 and the second connector 5, naked battery core 2 generally passes through coiling by positive plate, negative plate and barrier film
Or overlapped way is formed, positive pole ear 2a and negative lug 2b are drawn on positive plate and negative plate respectively.Shell 3 is general
For metal material, and collectively constitute the cavity for accommodating naked battery core 2 with top cover structure of power battery, naked battery core 2 is just located at this
In cavity.
As shown in Fig. 1 is to 11, top cover structure of power battery includes first electrode assembly 10, second electrode assembly 20, first
Short-circuit part 30, the second short-circuit part 40 and coping plate 50.Wherein, first electrode assembly 10 and second electrode assembly 20 are equal
On coping plate 50 to be attached to, for the positive pole of electrokinetic cell and negative pole are drawn respectively.Second connector 5 is formed with
The fusible member 6 of breach or hole shape, certain fusible member 6 can also concurrently or separately be arranged on the first connector 4.
Generally, as shown in Fig. 2 is to 7,9 to 11, first electrode assembly 10 includes the first pole 100, first and insulate
Part 101 and the first electrode column sealing part 102, the bottom of the first pole 100 is located at the lower section of coping plate 50, the first pole 100
Top then can pass through coping plate 50 it should be noted that the first pole 100 can not be electrically connected with coping plate 50 directly contact, and two
Need between person to carry out insulated enclosure and fix by the first insulating part 101 and the first electrode column sealing part 102.
It is electrically connected with electrokinetic cell for the ease of external electric equipment, the first pole component 10 generally may also include
One conducting block 103, the first conducting block 103 can be fixed on one with the top of the first pole 100 by the mode such as welding or riveting
Rise, to increase contact area and to improve contact face structure, thus providing more superior JA(junction ambient).In order to prevent the first conduction
Block 103 is directly connected to coping plate 50, is fixed by the second insulating part 104 between the first conducting block 103 and coping plate 50.
Continuing with referring to Fig. 2, to shown in 7,9 to 11, the structure of second electrode assembly 20 typically may also comprise the second pole
200th, the 3rd insulating part 201, the second electrode column sealing part 202, the second conducting block 203 and the 4th insulating part 204, with first electrode
The structure of assembly 10 is identical, and the bottom of the second pole 200 in second electrode assembly 20 also is located at the lower section of coping plate 50, and the
The top of two poles 200 then passes through coping plate 50, passes through therebetween the 3rd insulating part 201 and the second electrode column sealing part 202
Carry out insulated enclosure to fix.And the second conducting block 203 is fixed on by the mode such as welding or riveting with the top of the second pole 200
Together, it is fixed by the 4th insulating part 204 therebetween simultaneously.
In the present embodiment, first electrode assembly 10 and second electrode assembly 20 connect the positive pole of electrokinetic cell respectively and bear
Pole, for example, connects positive pole using first electrode assembly 10, and second electrode assembly 20 connects negative pole, or adopt phase opposition method,
First electrode assembly 10 is connected negative pole, and second electrode assembly 20 connects positive pole.
In the present embodiment, the first short-circuit part 30 and the second short-circuit part 40 are two important contactors, just
In the case of often all there is not action in the first short-circuit part 30 and the second short-circuit part 40, and when the first short-circuit part 30 and second
When short-circuit part 40 is concurrently accessed circuit, first electrode assembly 10 can be electrically connected with second electrode assembly 20, make
Power internal short-circuit of battery, thus produce larger electric current to make the first connector 4 and/or the second connector 5 near fusible member 6
Fusing, thus cutting off the status of electrically connecting between positive pole ear 2a and first electrode assembly 10, and/or negative lug 2b and second
Status of electrically connecting between electrode assemblie 20.
In the process, the first short-circuit part 30 is responsible for the electrical connection of first electrode assembly 10 and coping plate 50, and second
Short-circuit part 40 is then responsible for the electrical connection of second electrode assembly 20 and coping plate 50.In the present embodiment, the first short-circuit part 30
And second short-circuit part 40 typically adopt contact chip (rotating sheet) form, being certainly also not excluded for can be in power current using other
Pond internal pressure can carry out the part of action after increasing.
First short-circuit part 30 is discussed in detail first below.In order to prevent the first short-circuit part 30 because being secured directly to push up
The problem that sensitivity and service life decline is caused on cover plate 50, as shown in Fig. 2 is to 7,9 to 11, permissible in the present embodiment
First short-circuit part 30 is arranged on the lower section of coping plate 50, and it is fixed with first electrode assembly 10, and first is short
Circuit unit 30 can be contacted with the coping plate 50 being positioned above after carrying out action, thus termination process of realizing being electrically connected.
Now, because the first short-circuit part 30 is actually located within electrokinetic cell, therefore in order in electrokinetic cell
The first short-circuit part 30 both sides are enable to there is pressure differential when overcharging it is necessary to by the first short-circuit part 30 and coping plate 50
Between space sealed, so that this segment space is separated with the other regions within electrokinetic cell, so that battery core is overcharged
When the gas that produces cannot be introduced in this space, thus causing the pressure differential of the first short-circuit part 30 both sides.
In order to realize this purpose, the first extension 105 and the first sealing can be increased in first electrode assembly 10
Part 106, the first extension 105 is located at the lower section of coping plate 50, and is connected with the bottom of the first pole 100, the first extension
It is provided with the first installing hole 107, the first short-circuit part 30 seals the first installing hole 107, first seal 106 is located at top on 105
Between cover plate 50 and the first extension 105, and around the first installing hole 107 1 circle, thus by the first short-circuit part 30 and top cover
Space between piece 50 is sealed.The position of first seal 106 can be limited by the first insulating part 101.
First seal 106 can be only around the first extension 105 so that the first short-circuit part 30, first seal 106
And coping plate 50 three surrounds sealing space.Additionally, first seal 106 can also be done and larger prolong so as to be in first
Between extending portion 105 and coping plate 50 so that the first extension 105, the first short-circuit part 30, first seal 106 and
Coping plate 50 4 surrounds sealing space jointly.
By said structure, the first short-circuit part 30 is no longer secured on coping plate 50, and therefore electrokinetic cell is because expanding
And the impact caused by coping plate 50 just will not be transferred to the first short-circuit part 30, thus avoid the spirit of the first short-circuit part 30
Sensitivity and service life reduction.
In the present embodiment, the second short-circuit part 40 can still be fixed on coping plate 50, and electric with second after action
Pole assembly 20 contacts.Specifically, as shown in Fig. 5,7,10,11, the second installing hole 207, the second peace are arranged on coping plate 50
Dress hole 207 will be located at the lower section of the second conducting block 203, and the second short-circuit part seals the second installing hole 207.In this structure
Two short-circuit parts 40 still can play a role, but or can be affected by coping plate 50.
Second short-circuit part 40 can not also be fixed on coping plate 50, now the second short-circuit part 40 and second electrode group
Can be as shown in Fig. 3,6, permissible using the attachment structure of similar first short-circuit part 30 and first electrode assembly 10 between part 20
Increase the second extension 205 and second seal 206 in second electrode assembly 20, the second extension 205 is located at coping plate
50 lower section, and be connected with the bottom of the second pole 200, the second installing hole 207 is arranged on the second extension 205, the
Two short-circuit part 40 seals the second installing hole 207, and second seal 206 is located between coping plate 50 and the second extension 205, and
Around the second installing hole 207 1 circle, thus the space between the second short-circuit part 40 and coping plate 50 is sealed.Second is close
The position of sealing 206 can be limited by the 3rd insulating part 201.
So, the first short-circuit part 30 and the second short-circuit part 40 are just all not fixed on coping plate 50, therefore
After electrokinetic cell expands, the first short-circuit part 30 and the second short-circuit part 40 will not be affected by top cover and be caused sensitivity
Decline or service life reduction.
Generally, coping plate 50 and shell 3 in order to prevent electrokinetic cell are corroded, and need the positive pole of battery core
Lug 2a is connected with coping plate 50 and shell 3 moment, makes coping plate 50 and shell positively charged.In order to meet this requirement, the
One of one electrode assemblie 10 and second electrode assembly 20 need the moment to keep the positive pole with electrokinetic cell and coping plate
50 status of electrically connecting, now another electrode assemblie then need and coping plate 50 keep dielectric relationship.
Electrokinetic cell is possible to be pierced through shell by conductive body and connect the negative plate of conducting strip in use, due to
Shell connects the positive pole of electrokinetic cell again, therefore drift bolt phenomenon the both positive and negative polarity of electrokinetic cell will be led to be directly connected to after occurring and
Form drift bolt loop, if the resistance value now in drift bolt loop is too small, during drift bolt, the electric current of external short circuit is excessive, drift bolt point holds
Easily strike sparks, cause electrokinetic cell out of control.
In order to solve this problem, the present embodiment is provided with electricity between the electrode assemblie being connected with positive pole and coping plate 50
Resistance 60, makes this electrode assemblie electrically connect with coping plate 50 by this resistance 60 all the time.The resistance of the resistance of resistance 60 can not be too small,
Such as 1～100000 ω, so that the electric current in drift bolt loop is greatly reduced.
However, when electrokinetic cell overcharges, electrokinetic cell air pressure inside increases to certain value, the first short-circuit part 30 and
The just action upwards of two short-circuit parts 40, is made the both positive and negative polarity of electrokinetic cell connect short circuit, is fused using larger loop current molten
Disconnected component 6, thus cut off major loop.If however, the resistance value in loop is excessive, the electric current in loop can be caused too small
(for example, less than 500a), fusible member 6 will not fuse, and do not have and stop electrokinetic cell from continuing the effect charged, therefore in reply
When electrokinetic cell overcharges, obviously cannot access the larger resistance of resistance in loop that is to say, that in overcharging loop, resistance 60
Can not be directly accessed in series in loop.
Therefore, in the present embodiment, and when electrokinetic cell internal pressure exceedes reference pressure, the first short-circuit part 30 He
Second short-circuit part 40 all can action under pressure, and formed by first electrode assembly 10 through the first short-circuit part
30th, coping plate 50, the second short-circuit part 40 arrive at the first electrical communication path of second electrode assembly 20, and are formed by the first electricity
Pole assembly 10 arrives at the second electrical communication path of second electrode assembly 20 through resistance 60, coping plate 50, the second short-circuit part 40.
As shown in Figures 1 to 3, in first embodiment of the application, first electrode assembly 10 connects positive pole, resistance 60
Between the first conducting block 103 and coping plate 50, the first conducting block 103 is made to electrically connect with coping plate 50 by resistance 60.At this
In embodiment, the second short-circuit part 40 is fixed on the second extension 205.
So, after the first short-circuit part 30 and the second short-circuit part 40 action, can be formed by the first pole 100 through
One extension 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second extension 205 arrive at the second pole
200 the first electrical communication path, and short through the first conducting block 103, resistance 60, coping plate 50, second by the first pole 100
Circuit unit 40, the second extension 205 arrive at the second electrical communication path of the second pole 200.Thus will be short-circuit for resistance 60.
As shown in Figure 4 and Figure 5, in second embodiment of the application, the set-up mode of resistance 60 and first enforcement
Example is identical, and from unlike first embodiment, the second short-circuit part 40 is fixed on coping plate 50.
After the first short-circuit part 30 and the second short-circuit part 40 action, can be formed and be prolonged through first by the first pole 100
Extending portion 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second conducting block 203 arrive at the second pole 200
First electrical communication path, and by the first pole 100 through the first conducting block 103, resistance 60, coping plate 50, the second short
Part 40, the second conducting block 203 arrive at the second electrical communication path of the second pole 200.Thus will be short-circuit for resistance 60.
As shown in fig. 6, in the 3rd embodiment of the application, first electrode assembly 10 connects positive pole, with first reality
Apply unlike example: resistance 60 is located between the first pole 100 and coping plate 50, make the first pole 100 pass through resistance 60 and top
Cover plate 50 electrically connects.
So, after the first short-circuit part 30 and the second short-circuit part 40 action, can be formed by the first pole 100 through
One extension 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second extension 205 arrive at the second pole
200 the first electrical communication path, and by the first pole 100 through resistance 60, coping plate 50, the second short-circuit part 40, second
Extension 205 arrives at the second electrical communication path of the second pole 200.Thus will be short-circuit for resistance 60.
As shown in fig. 7, in the 4th embodiment of the application, the set-up mode of resistance 60 and the 3rd embodiment phase
With from unlike the 3rd embodiment, the second short-circuit part 40 is fixed on coping plate 50.
After the first short-circuit part 30 and the second short-circuit part 40 action, can be formed and be prolonged through first by the first pole 100
Extending portion 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second conducting block 203 arrive at the second pole 200
First electrical communication path, and by the first pole 100 through resistance 60, coping plate 50, the second short-circuit part 40, the second conducting block
203 the second electrical communication path arriving at the second pole 200.Thus will be short-circuit for resistance 60.
As shown in Figures 8 to 10, in the 5th embodiment of the application, with second electrode assembly 20 connect positive pole, first
Electrode assemblie 10 connects negative pole, and, the second short-circuit part 40 is fixed on coping plate 50.Resistance 60 is located at the second conducting block
Between 203 and coping plate 50, and the second conducting block 203 is made to electrically connect with coping plate 50 by resistance 60.
After the first short-circuit part 30 and the second short-circuit part 40 action, can be formed and be prolonged through first by the first pole 100
Extending portion 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second extension 205 arrive at the second pole 200
First electrical communication path, and by the first pole 100 through the first short-circuit part 30, coping plate 50, resistance 60, the second conducting block
203 the 3rd electrical communication path arriving at the second pole 200.Thus will be short-circuit for resistance 60.
As shown in figure 11, in the 6th embodiment of the application, still with second electrode assembly 20 connection positive pole, first
Electrode assemblie 10 connects negative pole, and, the second short-circuit part 40 is fixed on coping plate 50.From unlike embodiment five, electricity
Resistance 60 is located between the second pole 200 and coping plate 50, and so that second resistance 200 is electrically connected with coping plate 50 by resistance 60.
After the first short-circuit part 30 and the second short-circuit part 40 action, can be formed and be prolonged through first by the first pole 100
Extending portion 105, the first short-circuit part 30, coping plate 50, the second short-circuit part 40, the second extension 205 arrive at the second pole 200
First electrical communication path, and by the first pole 100 through the first extension 105, the first short-circuit part 30, coping plate 50, electricity
Resistance the 60, second conducting block 203 arrives at the 3rd electrical communication path of the second pole 200.Thus will be short-circuit for resistance 60.
Above six embodiments respectively illustrate six kinds of different top cover structure of power battery, can adopt corresponding as needed
Scheme.
The top cover structure of power battery that the embodiment of the present application is provided is it can be avoided that short-circuit part is because being answered by coping plate
Power and lead to sensitivity and service life reduction.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations, any modification, equivalent substitution and improvement made based on the application
Deng should be included within the protection domain of the application.
Claims (11)
1. a kind of top cover structure of power battery is it is characterised in that include coping plate, two electrode assemblies and two short
Part,
At least one of two described electrode assemblies and described coping plate insulation set, in two described short-circuit parts at least
One is fixed on described electrode assemblie,
When electrokinetic cell internal pressure exceedes reference pressure, two described short-circuit parts all can action under pressure,
And make each described electrode assemblie be able to electrically connect with described coping plate by a described short-circuit part.
2. top cover structure of power battery as claimed in claim 1 is it is characterised in that two described electrode assemblies are respectively first
Electrode assemblie and second electrode assembly, two described short-circuit parts are respectively the first short-circuit part and the second short-circuit part,
Described first short-circuit part is located at the lower section of described coping plate, and is fixed on described first electrode assembly, described first
Can contact with described coping plate after short-circuit part action, the space between described first short-circuit part and described coping plate is close
Envelope.
3. top cover structure of power battery as claimed in claim 2 is it is characterised in that described first electrode assembly includes the first pole
Post, the first extension and first seal,
The bottom of described first pole is located at the lower section of described coping plate, and the top of described first pole passes through described coping plate,
Described first extending part is connected below described coping plate and with the bottom of described first pole,
First installing hole is provided with described first extension, described first short-circuit part seals described first installing hole, and institute
The space stated between the first short-circuit part and described coping plate is sealed by described first seal.
4. top cover structure of power battery as claimed in claim 2 it is characterised in that described second short-circuit part be fixed on described
On coping plate, and can touch with described second electrode attached components after action.
5. top cover structure of power battery as claimed in claim 4 is it is characterised in that described second electrode assembly includes the second pole
Post and the second conducting block,
Described second pole passes through described coping plate, and described second conducting block is located at the top of described coping plate, and with described the
Two pole electrical connections,
Second installing hole is provided with described coping plate, described second mounting hole site is in the lower section of described second conducting block, described
Second short-circuit part seals described second installing hole.
6. top cover structure of power battery as claimed in claim 2 is it is characterised in that described second electrode assembly includes the second pole
Post, the second extension and second seal,
The bottom of described second pole is located at below described coping plate, and the top of described second pole passes through described coping plate, institute
State the second extending part to be connected below described coping plate and with the bottom of described second pole,
Second installing hole is provided with described second extension, described second short-circuit part seals described second installing hole, and institute
The space stated between the second short-circuit part and described coping plate is sealed by described second seal.
7. the top cover structure of power battery as described in any one of claim 2 to 6 is it is characterised in that also include resistance, and described
One electrode assemblie is electrically connected with described coping plate by described resistance all the time,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and the equal energy of described second short-circuit part
Enough actions under pressure, and formed by described first electrode assembly through described first short-circuit part, described coping plate, institute
State the first electrical communication path that the second short-circuit part arrives at described second electrode assembly, and formed by described first electrode assembly
Arrive at the second electrical communication path of described second electrode assembly through described resistance, described coping plate, described second short-circuit part.
8. the top cover structure of power battery as described in any one of claim 2 to 6 is it is characterised in that also include resistance, and described
Two electrode assemblies are electrically connected with described coping plate by described resistance all the time,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and the equal energy of described second short-circuit part
Enough actions under pressure, and formed by described first electrode assembly through described first short-circuit part, described coping plate, institute
State the first electrical communication path that the second short-circuit part arrives at described second electrode assembly, and formed by described first electrode assembly
Arrive at the 3rd electrical communication path of described second electrode assembly through described first short-circuit part, described coping plate, described resistance.
9. it is characterised in that also including resistance, described first pole leads to top cover structure of power battery as claimed in claim 3
Cross described resistance to electrically connect with described coping plate,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and the equal energy of described second short-circuit part
Enough actions under pressure, and formed by described first electrode assembly through described first short-circuit part, described coping plate, institute
State the first electrical communication path that the second short-circuit part arrives at described second electrode assembly, and formed by described first electrode assembly
Arrive at the second electrical communication path of described second electrode assembly through described resistance, described coping plate, described second short-circuit part.
10. top cover structure of power battery as claimed in claim 3 is it is characterised in that described first electrode assembly also includes
One conducting block, described first conducting block is located above described coping plate, and electrically connects with the top of described first pole, described dynamic
Power battery cap structure also includes resistance, and described first conducting block is electrically connected with described coping plate by described resistance,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and the equal energy of described second short-circuit part
Enough actions under pressure, and formed by described first electrode assembly through described first short-circuit part, described coping plate, institute
State the first electrical communication path that the second short-circuit part arrives at described second electrode assembly, and formed by described first electrode assembly
Arrive at the second electrical communication path of described second electrode assembly through described resistance, described coping plate, described second short-circuit part.
11. top cover structure of power battery as claimed in claim 5 are it is characterised in that described second electrode assembly also includes
Two conducting blocks, described second conducting block is located above described coping plate, and electrically connects with the top of described second pole, described dynamic
Power battery cap structure also includes resistance, and described second pole or described second conducting block pass through described resistance and described top cover
Piece electrically connects,
And when electrokinetic cell internal pressure exceedes reference pressure, described first short-circuit part and the equal energy of described second short-circuit part
Enough actions under pressure, and formed by described first electrode assembly through described first short-circuit part, described coping plate, institute
State the first electrical communication path that the second short-circuit part arrives at described second electrode assembly, and formed by described first electrode assembly
Arrive at the 3rd electrical communication path of described second electrode assembly through described first short-circuit part, described coping plate, described resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042618.XA CN106374061A (en) | 2016-11-24 | 2016-11-24 | Top cover structure of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042618.XA CN106374061A (en) | 2016-11-24 | 2016-11-24 | Top cover structure of power battery |
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| Publication Number | Publication Date |
|---|---|
| CN106374061A true CN106374061A (en) | 2017-02-01 |
Family
ID=57892389
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611042618.XA Pending CN106374061A (en) | 2016-11-24 | 2016-11-24 | Top cover structure of power battery |
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| Country | Link |
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| CN (1) | CN106374061A (en) |
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| CN109216595A (en) * | 2017-06-30 | 2019-01-15 | 宁德时代新能源科技股份有限公司 | Power battery top cover assembly, power battery and battery module |
| CN109216641A (en) * | 2017-06-30 | 2019-01-15 | 比亚迪股份有限公司 | Battery protection cover plate assembly, power battery and electric car |
| WO2019051630A1 (en) * | 2017-09-12 | 2019-03-21 | 宁德时代新能源科技股份有限公司 | Top cover assembly of secondary battery and secondary battery |
| CN110492023A (en) * | 2019-08-15 | 2019-11-22 | 合肥国轩高科动力能源有限公司 | A kind of rectangular aluminum hull lithium battery cover plate |
| CN112952303A (en) * | 2018-04-23 | 2021-06-11 | 比亚迪股份有限公司 | Battery cover plate assembly, battery module, power battery and electric automobile |
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| CN109216595A (en) * | 2017-06-30 | 2019-01-15 | 宁德时代新能源科技股份有限公司 | Power battery top cover assembly, power battery and battery module |
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| CN112952303A (en) * | 2018-04-23 | 2021-06-11 | 比亚迪股份有限公司 | Battery cover plate assembly, battery module, power battery and electric automobile |
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| CN110492023A (en) * | 2019-08-15 | 2019-11-22 | 合肥国轩高科动力能源有限公司 | A kind of rectangular aluminum hull lithium battery cover plate |
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Application publication date: 20170201 |