CN109962204A - Battery cover board assembly, single battery, battery modules, power battery and electric car - Google Patents
Battery cover board assembly, single battery, battery modules, power battery and electric car Download PDFInfo
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- CN109962204A CN109962204A CN201711408952.7A CN201711408952A CN109962204A CN 109962204 A CN109962204 A CN 109962204A CN 201711408952 A CN201711408952 A CN 201711408952A CN 109962204 A CN109962204 A CN 109962204A
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- cover board
- battery
- welding section
- indentation
- board assembly
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- 238000003466 welding Methods 0.000 claims abstract description 136
- 238000007373 indentation Methods 0.000 claims abstract description 113
- 230000005611 electricity Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000004992 fission Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
This disclosure relates to a kind of battery cover board assembly, single battery, battery modules, power battery and electric car.Battery cover board assembly includes cover board, interior leading-out piece and electrode external terminal, interior leading-out piece and electrode external terminal are electrically connected by current interrupt device, current interrupt device indentation part includes forming impressed scored region, the first welding section for being electrically connected to each other with flip piece and the second welding section for being electrically connected with interior leading-out piece, on vertical section of the indentation part perpendicular to cover board length direction, first welding section, scored region and the second welding section is in a strip shape sets gradually, and indentation extends on scored region along the length direction of cover board.The electrical connection between the first welding section and the second welding section can be disconnected by breaking indentation equally, play the role of current interruptions.In addition the indentation part of strip setting can effectively save the size of indentation part in the direction of the width, be conducive to overall current interruption means in the direction of the width without departing from the range of cover board.
Description
Technical field
This disclosure relates to field of batteries, and in particular, to a kind of battery cover board assembly uses the list of the battery cover board assembly
Body battery, using the battery modules of the single battery, the power battery using the battery modules and the vehicle using the power battery
?.
Background technique
Battery plays an important role as energy-storage units in all trades and professions, such as power battery is widely used in new-energy automobile
Equal fields, wherein can have in the battery pack of power battery by multiple single batteries it is in series or in parallel with each other at battery modules with
Realize the work of charge and discharge.Wherein, power battery usually passes through BMS (battery management system) monitoring electricity in charge and discharge process
The variation of pressure and electric current calculates charging state.If voltage sample goes wrong, it is possible to lead to over-charging of battery, especially for three
For first system, the danger for reaching a certain level and cells burst explosion but will occur such as is overcharged.
Existing technical solution: the monitoring to the voltage and current of battery passes through Current integrating method and open circuit voltage method meter
Battery capacity is calculated, and controls the charge and discharge management of battery with this.But there is also deficiencies, such as battery voltage sampling or electric current to adopt
Sample failure or software failure, leading to battery, charging cannot control for a long time, especially in the case where charging pile charges,
When charging pile and battery manager communication failures, overcharges and be unable to control, over-charging of battery to a certain extent, can cause battery blow-up very
It is extremely on fire from explosion.
Therefore it provides a kind of itself can force the current interruptions technology for disconnecting charge-discharge circuit to have positive effect.
Summary of the invention
Purpose of this disclosure is to provide one kind to be related to a kind of battery cover board assembly, uses the monomer electricity of the battery cover board assembly
Pond, using the battery modules of the single battery, the power battery using the battery modules and the vehicle using the power battery.
To achieve the goals above, the disclosure provides a kind of battery cover board assembly, including cover board, on the inside of the cover board
Interior leading-out piece and the electrode external terminal on the outside of the cover board, the interior leading-out piece and the electrode external terminal pass through current interruptions
Device electrical connection, the current interrupt device include indentation part and flip piece, and the indentation part includes forming impressed indentation
Area, the first welding section for being electrically connected to each other with the flip piece and for being electrically connected with the interior leading-out piece second weldering
Area is met, the flip piece can be acted under gas pressure to be electrically connected and breaking the indentation with indentation part disconnection
It connects, on vertical section of the indentation part perpendicular to the cover board length direction, first welding section, scored region and second
Welding section is in a strip shape to be set gradually, and the indentation extends on the scored region along the length direction of the cover board.
Optionally, the scored region is formed as the elongate structure extended along the length direction of the cover board, the indentation edge
The length direction of the elongate structure extends, and first welding section and second welding section setting are high in the scored region
Spend the two sides in direction.
Optionally, the indentation is parallel with first welding section and second welding section respectively.
Optionally, the end of the indentation penetrates through to the indentation area edge or sets with the edge interval of the scored region
It sets.
Optionally, the spacing distance at the edge of the end of the indentation and the scored region is 0.01-1mm.
Optionally, the spacing distance at the edge of the end of the indentation and the scored region is 0.05-0.5mm
Optionally, first welding section, the scored region and second welding section sequentially form in the height direction
For I-shaped structure.
Optionally, the indentation is one be formed on the scored region single side, or to be formed in the scored region
Two on two-sided.
Optionally, the flip piece is formed as the elongate structure extended along the cover board length direction, and has along institute
The first bonding pad that the first welding section extends and is welded to each other is stated, which is formed as elongate structure and lower surface shape
At there is the weld groove for accommodating first welding section.
Optionally, the weld groove is N-shaped slot, to weld with two side edges of first welding section.
Optionally, the electrode external terminal is electrically connected with the flip piece, and the indentation part is connected electrically in the interior extraction
On part, the flip piece has the second bonding pad for being formed as elongate structure, the downside of second bonding pad and the cover board
Between be sealedly connected with support ring, the outer peripheral edge of the electrode external terminal is connected electrically in the upside of second bonding pad.
Optionally, the support ring is formed as the elongate structure extended along the cover board length direction and without departing from the lid
The widthwise edges of plate.
Optionally, the interior leading-out piece is formed as laminated structure, which, which has, is electrically connected with the indentation part
Intermediate welding section and the edge welding section being electrically connected with battery core, edge welding area are located at the outside of the intermediate welding section.
Optionally, the thickness of the edge welding section is more than or equal to the thickness of the intermediate welding section.
Optionally, the intermediate welding section with a thickness of 0.1-1mm, the edge welding section with a thickness of 1-5mm.
Optionally, the edge welding section is formed about the circular connected region of the intermediate welding section, or being located at should
The bar shaped welding section of intermediate welding section two sides.
Optionally, the intermediate welding section is integrally formed with the edge welding section or fission is connected.
The disclosure also provides a kind of single battery, which includes shell, accommodates battery core inside the shell, Yi Jifeng
Fill the battery cover board assembly of the shell, which is characterized in that the battery cover board assembly is the battery cover board group that the disclosure provides
Part, the interior leading-out piece is electrically connected with the battery core, and the flip piece is connected to the internal gas of the shell.
The disclosure also provides a kind of battery modules, and the single battery of disclosure offer is provided in the battery modules.
The disclosure also provides a kind of power battery, including backpack body and setting in the intracorporal battery modules of the packet, the battery
Mould group is the battery modules that the disclosure provides.
The disclosure also provides a kind of electric car, which is provided with the power battery of disclosure offer.
Through the above technical solutions, can be disconnected between the first welding section and the second welding section by breaking indentation equally
Electrical connection, plays the role of current interruptions.In addition arrangement in a strip shape in the vertical direction, i.e. indentation part is in short transverse
On size be greater than its size in the direction of the width, can effectively save the size of indentation part in the direction of the width in this way, have
Conducive to overall current interruption means in the direction of the width without departing from the range of cover board.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain together the disclosure, but and does not constitute limitation to the disclosure.In the accompanying drawings:
Fig. 1 is a kind of decomposed stereoscopic schematic diagram of battery modules of the disclosure；
Fig. 2 is the part isometric structural schematic diagram of the flip piece of current interrupt device in embodiment of the present disclosure；
Fig. 3 is the plan view from above of the flip piece of embodiment of the present disclosure current interrupt device；
Fig. 4 is the schematic perspective view of the single battery of embodiment of the present disclosure battery cover board assembly；
Fig. 5 is the stereoscopic schematic diagram of the first structure of the indentation part of current interrupt device in embodiment of the present disclosure；
Fig. 6 is the stereoscopic schematic diagram of second of structure of the indentation part of current interrupt device in embodiment of the present disclosure；
Fig. 7 is the stereoscopic schematic diagram of the third structure of the indentation part of current interrupt device in embodiment of the present disclosure；
Fig. 8 is the cross-sectional view of the battery cover board assembly of the indentation part in embodiment of the present disclosure based on Fig. 5；
Fig. 9 is the cross-sectional view of the battery cover board assembly of the indentation part in embodiment of the present disclosure based on Fig. 7；
Figure 10 is a kind of partial structure diagram of interior leading-out piece in embodiment of the present disclosure；
Figure 11 is the partial structure diagram of leading-out piece in another kind in embodiment of the present disclosure.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, and is not used in the limitation disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, left and right " be usually with
It is defined on the basis of the page of respective drawings, " inside and outside " refers to the inner and outer of corresponding component profile.
As shown in Figure 1 to 11, present disclose provides a kind of current interrupt device and its indentation part, flip piece, use this
The battery cover board assembly of current interrupt device uses the battery of the single battery using the single battery of the battery cover board assembly
The technical solution of mould group, the power battery using the battery modules and the vehicle using the power battery.Wherein as shown in Figure 1,
Current interrupt device is arranged between electrode external terminal 112 and internal battery core for cutting off the circuit inside and outside battery.Wherein, exist
In single battery, multiple single batteries pass through serial or parallel connection into battery modules, and can be placed in battery pack and form power
Battery.In addition, the various technical solutions provided in the disclosure can also be widely used in other electricity in addition to power battery field
In the field of pond.Specifically, the disclosure introduces related current interrupt device by two embodiments.Below in conjunction with attached drawing
Each embodiment is described in detail.
Firstly, as shown in Figure 1 and Figure 4, a kind of battery modules, including multiple monomers electricity are provided in embodiment of the present disclosure
Pond, wherein single battery may include shell 111, the cover board 110 for accommodating battery core inside the shell and package casing, wherein
Electrode external terminal 112 is arranged on the cover board, for completing outputting and inputting for electric current by various electrode leading-out pieces 119.Its
In, as shown in figure 8, the interior leading-out piece 109 that also there is battery cover board assembly the battery core to be electrically connected, current interrupt device is arranged in electricity
It is output and input between extreme outer 112 and interior leading-out piece 109 with the electric current that can control electrode terminal.I.e. current interruptions fill
Set under conventional sense in single cells for battery core conducting state, at this time electrode terminal can be normally carried out electric current input and
Output, to complete the charge/discharge operation of single battery, and under precarious position, such as when battery overcharges, current interruptions dress
The electric current input and electric current output that can interrupt electrode terminal are set, thus the problems such as avoiding battery from overcharging.Therefore, as weight
The reliability of the safety measure wanted, current interrupt device is most important, that is, needs current interrupt device can be with quick response.
In the disclosure, the current interrupt device in each embodiment is the mechanical structure of induction air pressure, specifically, electricity
Stream interruption means and the interior of shell gas connection of single battery simultaneously can act on the electric current for disconnecting and flowing through under pneumatic pressure.Specifically
It can be connected by the component of breaking inner come the transmitting of interruptive current, to cut off the charge and discharge of battery in time.Wherein institute's benefit
Air pressure source are as follows: when the precarious positions such as occurs overcharging in such as battery, inside battery can generate gas and then make shell
Internal air pressure increases, or when abnormal leading to battery temperature raising and making inside battery gas occur in use in battery
Pressure increases, to generate the Pneumatic pressure power of driving current interruption means.
By taking the embodiment of such as Fig. 8 as an example, the current interrupt device have indentation part 101 and with the indentation part
101 flip pieces 102 being connected to be electrically connected to each other, and flip piece 102 and indentation part 101 can disconnect electricity under gas pressure
Connection.It can be itself disconnecting at least one in the two, such as by corresponding component in embodiment of the present disclosure
On process weak indentation to realize the disconnection of this body structure, so that the disconnection of electrical connection is realized, specifically in indentation part 101
On be formed with indentation 104.That is, indentation 104 can be broken by the rotary movement of flip piece 102 under internal gas pressure
And realize the disconnection of the two electrical connection, to realize the purpose of the transmitting of cutting electric current.
Why in this way, be consider due in the field of such as power battery, need by electric current compared with
Greatly, it is therefore desirable to guarantee that the welding structure of indentation part 201 and flip piece 202 is stablized, avoid high current fusing welding structure.In this way
By the setting of the indentation 104 of indentation part 101, i.e., the weak point that intensity is less than other regions is processed in corresponding portion, so that it may
To complete being fully disconnected for indentation part 101 and flip piece 102
Wherein, in embodiment of the present disclosure, as shown in Figures 2 and 3, flip piece 102 is to form tapered sheet knot
Structure, the small end of the taper are formed as the first bonding pad 115, and big end is far from indentation part 101 and is formed as the second bonding pad 116.It should
Pyramidal structure two bonding pad antarafacials can be arranged, and be capable of providing the space that 102 stress of flip piece is flipped up, to draw
Disconnected indentation 104.In other possible embodiments, flip piece can also be flexible planar member etc..
As shown in Figure 8 and Figure 9, in embodiment of the present disclosure, in order to guarantee to be acted on by the gas of inside battery,
Support ring 113, the outer peripheral edge electricity of electrode external terminal 112 are sealedly connected on the downside of the outer peripheral edge of flip piece 102 between cover board 110
Be connected on the upside of the outer peripheral edge of flip piece 102, in this way from the gas that inside battery generates can act on flip piece 102 without
It can leak.And in order to make flip piece 102 be operating normally, electrode external terminal 112 is formed as capping structure and can be with shape
At there is through-hole 118, with for gas to be discharged when flip piece 102 acts, to avoid under gas pressure that flip piece is dynamic anyway
Make.In addition it charges and insulate in two kinds of embodiments in cover board 110, support ring 113 can choose insulating materials or conduction material
Material support.Normally, support ring 113 can be ceramic ring so that cover board 110 insulation and it is not charged.
As shown in Figures 2 and 3, the battery cover board assembly that embodiment of the present disclosure provides, including flip piece 102, this is turned over
Turn part on the basis of aforementioned embodiments, is formed as the elongate structure extended along the length direction of cover board 110.Wherein, herein
In elongate structure refer to that in the section for being parallel to cover board of the elongate structure, the size on cover board length direction is greater than
Size on other directions.Therefore, as shown in figure 4, it is elongated due to being formed as extending along cover board length direction on flip piece 102
Structure, therefore can be in the case where guaranteeing the contact area with internal gas, reduce example includes the flip piece 102 as shown in figure 1
Current interrupt device expose the part of cover board 110 and exceed the possibility of cover board 110 along short transverse, or even as shown in figure 9, can
Completely within the scope of cover board, to avoid causing to interfere to other devices other than cover board 110, while overturning sensitivity and obtaining
To guarantee.
Wherein as shown in Figures 2 to 4, in embodiment of the present disclosure, the end of the elongate structure along its length is
Arc-shaped, i.e., its section for being parallel to cover board has the rectangle of centre and the arcuate structure at both ends, thus adapting to cover board 110
While structure, convenient for forming flip piece structure corresponding with other of annular, such as matched indentation part 101, support
Ring 113 and electrode external terminal 112.In other embodiments, elongate structure can also be kidney-shaped structure or oval structure,
The long axis of kidney-shaped structure or oval cross section is i.e. along the direction of cover board.In some embodiments, the parallel and cover board of elongate structure
Section may be formed as the other shapes such as rectangular section.
In embodiment of the present disclosure, since the component connected outside cover board 110 with flip piece 102 is electrode external terminal
112 and support ring 113, therefore both can design and to be similarly the elongate structure matched, in this way, for the company between component
It connects, the second bonding pad 115 being at least connected in flip piece 102 with electrode external terminal 112 and support ring 113 is formed as elongated knot
Structure.For support ring 113 therein due to being connected with cover board 110, the elongate structure that can design its formation does not stretch out the side of cover board 110
Edge, the specially widthwise edges of cover board 110, wherein the edge of the widthwise edges of the optional support ring 113 and cover board 110 is aligned.
So that flip piece 102 obtains biggish design and stress space.
In the present embodiment, as shown in Fig. 2, the first bonding pad 116 is also correspondingly formed to extend along cover board length direction
Elongate structure.The end of the elongate structure along its length be it is arc-shaped, the elongate structure may be oval or waist
Shape structure.Corresponding indentation part 101 can then be formed as elongate structure as shown in Figures 5 to 7.
The flip piece 102 in present embodiment is continued to describe, flip piece 102 is along the direction perpendicular to 110 upper surface of cover board
For the laminated structure for forming taper, the first bonding pad 115 that the small end of the taper is formed is formed as elongate structure, and big end is far from quarter
Trace part 110 and the second bonding pad 116 of formation, second bonding pad 116 is parallel with the first bonding pad 115 and is formed as elongated knot
Structure.Specifically, the second bonding pad 106 is turnup structure, to facilitate while be connected with support ring 113 with electrode external terminal 122.
In the present embodiment, in order to guarantee bonding strength, the thickness point of the first bonding pad 115 and the second bonding pad 116
123 thickness of operating space that great Yu be not between the two.Specifically, the first bonding pad and the second bonding pad with a thickness of can be with 0.3-
3mm, the thickness of operating space 123 can be 0.05-0.3mm.The design is equally applicable to the flip piece in other embodiments
102。
As shown in Figures 5 to 7, the battery cover board assembly provided based on embodiment of the present disclosure, continues to introduce the disclosure
The three kinds of indentation parts provided.The indentation part of ring structure, the quarter provided in present embodiment are provided different from existing indentation
In trace part 101, indentation 104 is the elongated indentation of non-closed loop.Specifically, in indentation part 101 perpendicular to 110 length direction of cover board
On vertical section, the first welding section 103, scored region 105 and the second welding section 107 is in a strip shape sets gradually, and indentation 104 exists
Extend on scored region 105 along the length direction of cover board 110.The first welding section can be equally disconnected by breaking indentation 104 in this way
103 and the second electrical connection between welding section 107, play the role of current interruptions.In addition cloth in a strip shape in the vertical direction
Mode is set, i.e. the size of indentation part in the height direction is greater than its size in the direction of the width, can effectively save quarter in this way
The size of trace part 101 in the direction of the width is conducive to overall current interruption means in the direction of the width without departing from the model of cover board 110
It encloses.
In addition, in the present embodiment, scored region 105 is formed as the elongate structure extended along the length direction of cover board, i.e.,
Size on indentation part length direction is greater than the size in its width direction and short transverse.Indentation 104 therein is elongated along this
The length direction of structure extends, to form the indentation of non-closed loop, optionally, indentation 104 is linear indentation, possible at other
Embodiment in, indentation can also be the elongated indentation such as curve or broken line.And in order to realize breaking for indentation 104, first
The two sides of 105 short transverse of scored region are arranged in welding section 103 and the second welding section 107.I.e. as in the orientation of figure, first is welded
Area 103, scored region 105 and the second welding section 107 are set gradually from top to bottom along short transverse, thus hanging down in indentation part 101
Directly in linear distribution on the vertical section of cover board 110.To be different from the existing annular indentation part being radially distributed.In this way,
After the overturning of 102 stress of flip piece, indentation 104 can equally be broken, to realize the purpose of current interruptions.
As shown in Figure 5 and Figure 6, in one embodiment, the first welding section 103, scored region and the second welding section are in height
Sequentially formed on direction as I-shaped structure, i.e., the two sides of two welding sections protruded from scored region 105 and can respectively and its
The solder joint of his component.In this way when with flip piece and the welding of motor inner terminal, welding is more stable, avoids the occurrence of in external force
Under there is the problem of solder joint surprisingly disconnects.Wherein the short transverse of indentation part 101 is being filled for its length direction
After being fitted on cover board, short transverse is the up and down direction relative to cover board.In another embodiment, the first welding section
103, scored region 105 and the second welding section 107 are sequentially formed in the height direction as Z-shaped structure.That is, two welding sections only have
Side protrudes from scored region 105 and can form unilateral solder joint, in this way, when receiving external impacts, the corner of Z-shaped structure
It can have buffering effect, so that protection is located at the indentation 104 on the scored region 105 between two welding sections, and reduce indentation
104 possibility being surprisingly broken.
In addition, though I-shaped or Z-shaped, enable in present embodiment, the welding of indentation 104 and two welding sections
Region is arranged in short transverse or other directions in Different Plane, thus to reduce the heats such as laser welding to indentation
It influences.
In order to adapt to this elongated indentation part 101, as shown in Fig. 2, flip piece therein 102 is formed as along cover board extension
Elongate structure, and the setting being parallel to each other with the elongate structure of indentation part 101, wherein the first connection that flip piece 102 has
Area 115 extends and is welded to each other along the first welding section 103, which is formed as elongate structure and lower surface is formed with
Accommodate the weld groove 124 of the first welding section 103.Wherein weld groove 124 can be the N-shaped slot that section is n shape, or section L
The L-type slot of type.
Specifically, as shown in Figure 2 and Figure 7, when indentation part 101 be I-shaped structure when, weld groove 124 be N-shaped slot, with appearance
Two side edges into the first welding section 103 of the weld groove of receiving are welded, such as by soldering seam weld welding, so that the two is electric
Stable connection.
In addition, as shown in figure 9, when indentation part 101 is Z-shaped structure, weld groove 124 can with L-type structure, with receiving
It is welded into the first welding section of the weld groove far from the side edge of the second welding section, such as passes through soldering seam weld welding.It in this way can be with
When receiving external force, the buffering to scored region 105 is formed by the turning of Z-shaped structure.
In the present embodiment, no matter I-shaped or Z-shaped structure, also or half I-shaped half Z-shaped, indentation 104 can
It is parallel with the first welding section 103 and the second welding section 107 respectively to be arranged, so that when flip piece 102 is overturn, it can be to indentation
104 each section applies maximum vertical mastication forces, without generating the component in other directions, to provide current interrupt device
Sensitivity.
In the present embodiment, as shown in Figure 5 or Figure 6, the end of indentation 104 can be penetrated through to 105 edge of scored region also
Or it is arranged with the edge interval of scored region 105.The spirit of current interrupt device can be promoted by wherein penetrating through the edge to scored region 105
Sensitivity, and possess interval and then can guarantee indentation part 101 when inside battery air pressure is fluctuated in low range, inner pressure of battery is to indentation
The indentation 104 of piece 101 will not have an impact, and only when internal pressure value is more than predetermined value, cell internal pressure could draw indentation 104
It is disconnected.
As shown in fig. 6, especially both ends have when having interval between the end of indentation 105 and the edge of scored region 105
When having interval, the spacing distance that can design the end of indentation 104 and the edge of scored region 105 is 0.01-1mm, further,
The spacing distance at the edge of the end and scored region 105 of indentation 104 is 0.05-0.5mm.To guarantee that current interruptions fill
The sensitivity set, additionally it is possible to guarantee that indentation is not influenced by external force or air pressure inside fluctuation and is disconnected in addition.
In two kinds of embodiments of the I-shaped and Z-shaped of present embodiment, the first welding section 103 and the second welding section
107 thickness be respectively greater than or equal to scored region 105 thickness.Herein it should be noted that being formed as due to scored region 105
Plate structure, the thickness direction of thickness direction and two welding sections and inconsistent, the thickness direction of two of them welding section exists
It is up and down direction in figure, i.e., is welded with the side edge of weld groove, can be understood as the direction perpendicular to cover board 110, and carves
The thickness direction in trace area 105 is then the direction with cover board 110 in parallel, i.e., the width direction of whole indentation part, at this time 104 shape of indentation
At on the side that about 105 scored region extends.
Specifically, the first welding section 103 and the second welding section 107 with a thickness of 0.4-5mm, scored region 105 with a thickness of
0.05-1mm.Further, the first welding section 103 and the second welding section 107 with a thickness of 0.8-3mm, the thickness of scored region 105
For 0.1-0.8mm.Therefore, the thickness for being less than or equal to two welding sections by the way that the thickness of scored region 105 is arranged, both can guarantee welding
The weld strength in region, and can be processed for the indentation of high quality and basis is provided.
Furthermore it is also possible to which the thickness for designing the first welding section 103 is equal to or less than the thickness in the second 107th area of welding.Therefore
The assembly space of more occupancy flip piece 102 can be avoided while guaranteeing weld strength, so that flip piece 102 can be with
That designs in the height direction as far as possible is thicker, breaks indentation 104 to carry out biggish rotary movement.
In the present embodiment, as shown in Figure 6 and Figure 7, indentation 104 can be one be formed on 105 single side of scored region
Item, or as shown in figure 5, for be formed in scored region 105 it is two-sided on two.When indentation 104 is two, two indentations are being carved
Setting is aligned on the two sides in trace area 105, to promote the sensitivity of current interrupt device.
In the present embodiment, as shown in Figure 8 and Figure 9, flip piece has the second bonding pad for being formed as elongate structure
116, support ring 113, the outer peripheral edge of electrode external terminal 112 are sealedly connected between the downside and cover board 110 of the second bonding pad 116
It is connected electrically in the upside of the second bonding pad 116.In this way, support ring can be formed as the elongate structure extended along cover board, and more
It is possible to further as shown in figure 9, widthwise edges of the support ring without departing from cover board are designed, to avoid influencing its outside battery
His equipment.
In order to adapt to the assembly of elongated indentation part 101, as schemed in the battery cover board assembly that disclosure embodiment provides
8, shown in Figure 10 and Figure 11, interior leading-out piece 109 is formed as laminated structure, which has is electrically connected with indentation part 101
Intermediate welding section 131 and the edge welding section 132 being electrically connected with battery core, edge welding section 132 are located at the outer of intermediate welding section 131
Side.Wherein, the thickness of edge welding section 132 is more than or equal to the thickness of intermediate welding section 131.Thickness in intermediate welding section 131
When smaller, step structure can be constituted with edge welding section 132 and there is difference in height, i.e., as shown in figure 8, the two is in vertical direction
On not in the same plane, in this way, carrying out edge welding section and cell polar ear or and other adapters between battery core
When welding, buffer function can be played to the indentation part 101 for being connected between welding section.
Specifically, in order to guarantee structural strength and buffer function, optionally, intermediate welding section 131 with a thickness of 0.1-
1mm, edge welding section 132 with a thickness of 1-5mm.On another formal structure, as shown in Figure 10, edge welding section 132 is formed as enclosing
Around the circular connected region of intermediate welding section 131, wherein the figure is the part figure being intercepted, and passes through the edge welding section 132 of annular
Intermediate welding section 131 can be surrounded, in addition as shown in figure 11, edge welding section can also be for positioned at the intermediate welding section 131
The bar shaped welding section of two sides.Intermediate welding section 131 is not closed, so that intermediate welding section both ends have opening, for such change
Shape is all fallen in protection scope of the present invention.In addition, intermediate welding section 131 and edge welding section 132 can be integrally formed, in this way
The welding quantity of component can be reduced, assembly is simpler, and in some embodiments, the two can be connected with fission, such as
It is connected by welding, the buffer function to intermediate welding region can be increased in this way.
Further, the of indentation part 101 is accommodated as shown in figure 8, could be formed on the intermediate welding section of interior leading-out piece 109
The receiving weld groove 133 of two welding sections 107, the receiving weld groove extend and same shape along the second welding section 107 for forming elongate structure
It at elongate structure, and can be the through-hole structure for penetrating through intermediate welding section in the up-down direction, can not also penetrate through, with the
It can be realized and be welded by seam weld (soldering etc.) between two welding sections 107.
The single battery that the disclosure provides including shell 111, accommodates the upper of battery core inside the shell and package casing
The battery cover board assembly stated, interior leading-out piece 109 is electrically connected with battery core, and flip piece 102 is connected to the internal gas of shell.
The battery modules that the disclosure provides are provided with above-mentioned single battery in the battery modules.
Including backpack body and the intracorporal above-mentioned battery modules of the packet are arranged in the power battery that the disclosure provides.
The electric car that the disclosure provides, the electric car are provided with above-mentioned power battery.
Five kinds of embodiments of the disclosure are described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (21)
1. a kind of battery cover board assembly including cover board (110), the interior leading-out piece (109) being located on the inside of the cover board (110) and is located at
Electrode external terminal (112) on the outside of the cover board (110), the interior leading-out piece (109) and the electrode external terminal (112) pass through electricity
Interruption means electrical connection is flowed, the current interrupt device includes indentation part (101) and flip piece (102), the indentation part (101)
Scored region (105) including being formed with indentation (104), the first welding section for being electrically connected to each other with the flip piece (102)
(103) and for the second welding section (107) for being electrically connected with the interior leading-out piece (109), the flip piece (102) can be
It is acted under gas pressure to be disconnected and be electrically connected with the indentation part (101) and breaking the indentation (104), feature exists
In, on vertical section of the indentation part (101) perpendicular to the cover board (110) length direction, first welding section
(103), scored region (105) and the second welding section (107) are in a strip shape sets gradually, and the indentation is in the scored region
(105) extend on along the length direction of the cover board (110).
2. battery cover board assembly according to claim 1, which is characterized in that the scored region (105) is formed as along described
The elongate structure that the length direction of cover board extends, the indentation (104) extend along the length direction of the elongate structure, and described
First welding section (103) and second welding section (107) are arranged in the two sides of the scored region (105) short transverse.
3. battery cover board assembly according to claim 2, which is characterized in that the indentation (104) is respectively with described first
Welding section (103) is parallel with the second welding section (107).
4. battery cover board assembly according to claim 2, which is characterized in that the end of the indentation (104) is penetrated through to institute
It states scored region (105) edge or is arranged with the edge interval of the scored region (105).
5. battery cover board assembly according to claim 4, which is characterized in that the end of the indentation (104) and the quarter
The spacing distance at the edge in trace area (105) is 0.01-1mm.
6. battery cover board assembly according to claim 5, which is characterized in that the end of the indentation (104) and the quarter
The spacing distance at the edge in trace area (105) is 0.05-0.5mm.
7. battery cover board assembly according to claim 1, which is characterized in that first welding section (103), the indentation
Area (105) and second welding section (107) are sequentially formed in the height direction as I-shaped structure.
8. battery cover board assembly according to claim 1, which is characterized in that the indentation (104) is to be formed in the quarter
One on trace area (105) single side, or for be formed in the scored region (105) it is two-sided on two.
9. battery cover board assembly according to claim 2, which is characterized in that the flip piece is formed as long along the cover board
The elongate structure that direction extends is spent, and there is the first bonding pad for extending and being welded to each other along first welding section (103)
(115), which is formed as elongate structure and lower surface is formed with the weld groove for accommodating first welding section (103)
(124)。
10. battery cover board assembly according to claim 9, which is characterized in that the weld groove (124) be N-shaped slot, with institute
State two side edges welding of the first welding section (103).
11. battery cover board assembly according to claim 9, which is characterized in that the electrode external terminal (112) is turned over described
Turn part (102) electrical connection, the indentation part (101) is connected electrically on the interior leading-out piece (109), and the flip piece, which has, to be formed
For the second bonding pad (116) of elongate structure, sealed between the downside and the cover board (110) of second bonding pad (116)
It is connected with support ring (113), the outer peripheral edge of the electrode external terminal (112) is connected electrically in the upper of second bonding pad (116)
Side.
12. battery cover board assembly according to claim 11, which is characterized in that the support ring is formed as along the cover board
Length direction extend elongate structure and without departing from the widthwise edges of the cover board.
13. battery cover board assembly described in any one of -12 according to claim 1, which is characterized in that the interior leading-out piece
(109) be formed as laminated structure, the laminated structure have the intermediate welding section (131) that is electrically connected with the indentation part (101) and
The edge welding section (132) being electrically connected with battery core, the edge welding section (132) are located at the outer of the intermediate welding section (131)
Side.
14. battery cover board assembly according to claim 13, which is characterized in that the thickness of the edge welding section (132)
More than or equal to the thickness of the intermediate welding section (131).
15. battery cover board assembly according to claim 14, which is characterized in that the thickness of the intermediate welding section (131)
For 0.1-1mm, the edge welding section (132) with a thickness of 1-5mm.
16. battery cover board assembly according to claim 13, which is characterized in that the edge welding section (132) is formed as
Around the circular connected region of the intermediate welding section (131), or it is located at the bar shaped welding of intermediate welding section (131) two sides
Area.
17. battery cover board assembly according to claim 13, which is characterized in that the intermediate welding section (131) and described
Edge welding section (132) is integrally formed or fission is connected.
18. a kind of single battery, which includes shell (111), accommodates battery core inside the shell and encapsulate described outer
The battery cover board assembly of shell, which is characterized in that the battery cover board assembly is according to any one of claim 1-17
Battery cover board assembly, the interior leading-out piece (109) is electrically connected with the battery core, and the flip piece (102) and described outer
The internal gas of shell is connected to.
19. a kind of battery modules, which is characterized in that be provided in the battery modules according to claim 1 described in any one of 8
Single battery.
20. a kind of power battery, including backpack body and setting are in the intracorporal battery modules of the packet, which is characterized in that the battery mould
Group is the battery modules according to claim 19.
21. a kind of electric car, which is characterized in that the electric car is provided with power battery according to claim 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711408952.7A CN109962204B (en) | 2017-12-22 | 2017-12-22 | Battery cover plate assembly, single battery, battery module, power battery and electric automobile |
| PCT/CN2018/122233 WO2019120236A1 (en) | 2017-12-22 | 2018-12-20 | Cover plate assembly, single battery, battery module, power battery and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711408952.7A CN109962204B (en) | 2017-12-22 | 2017-12-22 | Battery cover plate assembly, single battery, battery module, power battery and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109962204A true CN109962204A (en) | 2019-07-02 |
| CN109962204B CN109962204B (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711408952.7A Active CN109962204B (en) | 2017-12-22 | 2017-12-22 | Battery cover plate assembly, single battery, battery module, power battery and electric automobile |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109962204B (en) |
| WO (1) | WO2019120236A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114762182A (en) * | 2019-11-29 | 2022-07-15 | 三洋电机株式会社 | Sealed battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115863869B (en) * | 2021-09-27 | 2024-01-09 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery monomer, battery and electric equipment |
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| KR20060037595A (en) * | 2004-10-28 | 2006-05-03 | 삼성에스디아이 주식회사 | Secondary battery |
| JP5609905B2 (en) * | 2012-03-06 | 2014-10-22 | 株式会社豊田自動織機 | Power storage device, secondary battery and vehicle |
| KR101755861B1 (en) * | 2015-10-16 | 2017-07-07 | 현대자동차주식회사 | Battery Cell |
| CN107123783B (en) * | 2016-02-25 | 2020-10-20 | 比亚迪股份有限公司 | Single battery, battery module, power battery and electric automobile |
| CN207818641U (en) * | 2017-12-22 | 2018-09-04 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric vehicle |
| CN207818749U (en) * | 2017-12-22 | 2018-09-04 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric vehicle |
| CN207818642U (en) * | 2017-12-22 | 2018-09-04 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric vehicle |
| CN207818643U (en) * | 2017-12-22 | 2018-09-04 | 比亚迪股份有限公司 | Battery cover board assembly, single battery, battery modules, power battery and electric vehicle |
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- 2018-12-20 WO PCT/CN2018/122233 patent/WO2019120236A1/en active Application Filing
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|---|---|---|---|---|
| US5171648A (en) * | 1991-08-13 | 1992-12-15 | Alliant Techsystems Inc. | Snap-action current interruption diaphragm system for over-pressurized electrochemical cells |
| JPH06196140A (en) * | 1992-12-25 | 1994-07-15 | Sanyo Electric Co Ltd | Explosion-proof type sealed battery |
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| CN114762182A (en) * | 2019-11-29 | 2022-07-15 | 三洋电机株式会社 | Sealed battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109962204B (en) | 2020-12-25 |
| WO2019120236A1 (en) | 2019-06-27 |
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