CN207818746U - Current interrupt device and its indentation part, battery cover board assembly, single battery, battery modules, power battery and electric vehicle - Google Patents

Abstract

The present disclosure discloses a kind of current interrupt device and its indentation part, battery cover board assembly, single battery, battery modules, power battery and electric vehicles.The 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 electrode inner terminal, flip piece can be acted under gas pressure to be electrically connected with the disconnection of indentation part by breaking indentation, and the indentation is arranged around first welding section and with the first welding section and/or the second welding section antarafacial.Due on indentation part indentation and at least one of the first welding section and the second welding section not in same plane, therefore can effectively eliminate by flip piece transmission Lai mechanical shock of the external force to the indentation on indentation part, and heat affecting of the welding stress of the first welding section to indentation region can also be eliminated, the reliability of current interrupt device is promoted.

Description

Current interrupt device and its indentation part, battery cover board assembly, single battery, battery mould Group, power battery and electric vehicle

Technical field

This disclosure relates to field of batteries, and in particular, to a kind of current interrupt device and its indentation part, using in the electric current The battery cover board assembly of disconnected device, is made using the single battery of the battery cover board assembly using the battery modules of the single battery Power battery with the battery modules and the vehicle using the power battery.

Background technology

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, can have wherein 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 monitors electricity in charge and discharge process by BMS (battery management system) 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：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 fails or software failure, and leading to battery, charging cannot control for a long time, especially in the case where charging pile charges, When charging pile is with 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.

Utility model content

Purpose of this disclosure is to provide a kind of current interrupt device and its indentation part, use the battery of the current interrupt device Cover plate assembly uses the battery modules using the single battery of the battery cover board assembly using the battery modules of the single battery Power battery and using the power battery vehicle.

To achieve the goals above, the disclosure provides a kind of indentation part of current interrupt device, which includes being formed Impressed scored region, the first welding section for being electrically connected to each other with flip piece and for being electrically connected with electrode inner terminal Second welding section, the flip piece can be acted under gas pressure to be disconnected with the indentation part by breaking the indentation Electrical connection, the first welding section described in second welding section, the scored region are radially sequentially arranged from outside to inside, and from outer It is inwardly formed to move closer to the step structure of the flip piece, the indentation is arranged around first welding section.

Optionally, the boss protruded from the scored region is formed on the indentation part, first welding section is by described convex The formation of platform upper surface is simultaneously parallel with the scored region, and the outer peripheral edge of the upper surface is provided with annular solder joint.

Optionally, the indentation part includes the boss protruded from the scored region, and first welding section is formed in described On boss, first welding section is formed by the boss upper surface and, the periphery of the scored region parallel with the scored region Edge is formed with the ring wall reversely protruded with the boss, second welding section be formed in the outer peripheral edge of the ring wall and with it is described Scored region is parallel, and the outer peripheral edge of second welding section is formed with annular solder joint.

Optionally, the side wall of the boss and the ring wall are vertical with the scored region respectively.

Optionally, first welding section, the scored region and second welding section are respectively formed cyclic structure.

The disclosure also provides a kind of current interrupt device, including indentation part and flip piece, and the indentation part carries for the disclosure The indentation part of confession, the indentation part are electrically connected to each other by first welding section with the flip piece.

The disclosure also provides a kind of battery cover board assembly, including cover board, the electrode inner terminal on the inside of the cover board and position Electrode external terminal on the outside of the cover board, the electrode inner terminal and the electrode external terminal are electrically connected by current interrupt device It connects, the current interrupt device is the current interrupt device that the disclosure provides, and the electrode external terminal is electrically connected with the flip piece It connects, the indentation part is connected electrically on the electrode inner terminal.

Optionally, support ring, the electrode are sealedly connected between the cover board on the downside of the outer peripheral edge of the flip piece The outer peripheral edge of external terminal is connected electrically on the upside of the outer peripheral edge of the flip piece.

Optionally, the inner wall of the support ring is formed with support lugn, the flip piece and the electrode external terminal it is outer Peripheral support is in the upper surface of the support lugn.

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 electrode inner terminal 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 the battery modules being arranged in the backpack body, the battery Module is the battery modules that the disclosure provides.

The disclosure also provides a kind of electric vehicle, which is provided with the power battery of disclosure offer.

Through the above technical solutions, since the indentation on indentation part in same plane and is not constituted with other two welding sections Step structure, thus can effectively eliminate by flip piece and electrode inner terminal both direction transmit Lai external force on indentation part The mechanical shock of indentation, and heat affecting of the welding stress of two welding sections to indentation region can also be eliminated, it is promoted The reliability of current interrupt device.

Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.

Description of the drawings

Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：

Fig. 1 is the decomposed stereoscopic schematic diagram of battery modules in disclosure illustrative embodiments；

Fig. 2 is the sectional view of current interrupt device in the first illustrative embodiments of the disclosure；

Fig. 3 is the sectional view of current interrupt device in the second illustrative embodiments of the disclosure；

Fig. 4 is a kind of dimensional structure diagram for indentation part that the disclosure is provided based on the second illustrative embodiments；

Fig. 5 is the dimensional structure diagram for the flip piece that the disclosure is provided based on the first illustrative embodiments；

Fig. 6 is the schematic cross-sectional view based on the battery cover board assembly of current interrupt device in disclosure first embodiment.

Specific implementation mode

The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the 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 typically 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 Figures 1 to 6, present disclose provides a kind of current interrupt device and its indentation part, flip piece, use the electricity The battery cover board assembly of stream interruption means uses the battery mould of the single battery using the single battery of the battery cover board assembly The technical solution of group, the power battery using the battery modules and the vehicle using the power battery.Wherein as shown in Figure 1, electricity Stream interruption means is arranged between electrode external terminal 112 and corresponding electrode inner terminal for the circuit inside and outside cut-out battery. Wherein, in single cells, multiple single batteries and can be placed in battery pack and shape by serial or parallel connection at battery modules At power battery.In addition, in addition to power battery field, the various technical solutions provided in the disclosure can also be widely used in it In his field of batteries.Specifically, the disclosure introduces involved current interrupt device by two embodiments.It below will knot Attached drawing is closed each embodiment is described in detail.

First, as shown in Figure 1, being provided which a kind of battery modules, including multiple single batteries in each embodiment of the disclosure, Wherein, single battery may include shell 111, the electrode inner terminal 109 that accommodates battery core inside the shell, be electrically connected with the battery core And the cover board 110 of package casing, wherein electrode external terminal 112 are arranged on the cover board, for passing through various electrode leading-out pieces 119 completion electric currents are output and input.Current interrupt device is arranged between electrode external terminal and electrode inner terminal can control The electric current of electrode terminal processed is output and input.I.e. current interrupt device is in single cells battery core conducting under conventional sense State, at this time electrode terminal can be normally carried out outputting and inputting for electric current, to complete the charge/discharge operation of single battery, and Under precarious position, such as when battery overcharges, current interrupt device can interrupt electrode terminal electric current input and electric current it is defeated Go out, the problems such as to avoid battery from overcharging.Therefore, as important safety measure, the reliability of current interrupt device is extremely It closes 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 enclosure 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 transmission of interruptive current, to cut off the charge and discharge of battery in time.Wherein institute's profit Air pressure source is：When the precarious positions such as occurs overcharging in such as battery, inside battery will produce gas and then make shell Internal air pressure increases, or causes battery temperature to increase when exception occurs in use in battery and make inside battery gas Pressure increases, to generate the Pneumatic pressure power of driving current interruption means.

By taking the embodiment of such as Fig. 2 to Fig. 3 as an example, the current interrupt device have indentation part 101 and with the quarter The connected flip piece 102 to be electrically connected to each other of trace part 101, and flip piece 102 can break with indentation part 101 under gas pressure Open electrical connection.Can be to disconnect at least one itself in the two, such as by corresponding in embodiment of the present disclosure Weak indentation is processed on component to realize the disconnection of this body structure, to realize the disconnection of electrical connection, specifically in indentation Indentation 104 is formed on part 101.That is, under internal gas pressure, quarter can be broken by the rotary movement of flip piece 102 Trace 104 and realize both electrical connection disconnection, to realize cut-out electric current transmission purpose.

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 ensure 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., process the weak point that intensity is less than other regions in corresponding portion, so that it may To complete being fully disconnected for indentation part 101 and flip piece 102, indentation is usually to be set around the welding section of indentation part and flip piece It sets, to ensure being fully disconnected for the two.

The indentation part 101 and flip piece 102 in two kinds of embodiments of the disclosure are introduced with reference to Fig. 2 and Fig. 3.

As shown in Figures 2 and 3, the disclosure provides a kind of indentation part of current interrupt device, includes on the indentation part 101 Be formed with the scored region 105 of indentation 104, the first welding section 103 for being electrically connected to each other with flip piece 102, and for Second welding section 107 of electrode inner terminal electrical connection, flip piece 102 can act under gas pressure with by breaking indentation 104 and be electrically connected with the disconnection of indentation part 101, wherein in the disclosure, indentation 104 surround the first welding section 103 and with this One welding section 103 and/or the setting of 107 antarafacial of the second welding section.That is, 103 He of plane and the first welding section where indentation 104 At least one of second welding section 107 not in a plane, can effectively eliminate in this way by flip piece 101 transmit come outside Mechanical shock of the power to the indentation 104 on indentation part 101, and the welding stress of welding section can also be eliminated to 104 institute of indentation Heat affecting in region.To promote the reliability for the current interrupt device that the disclosure provides.And around the first welding section 103 Indentation 104 can disconnect under the action of inside battery air pressure, at this time by the whole electricity for disconnecting flip piece 102 and indentation part 101 It connects and plays the role of current interruptions.

Further, as shown in Figure 3 and Figure 4, in this second embodiment, indentation 104 simultaneously with the first welding section 103 and The equal antarafacial setting in second welding section 107, specifically, the second welding section 107, scored region 105, the first welding section 103 radially from It is sequentially arranged outside to inside, and is formed as moving closer to the step structure of flip piece 102 from outside to inside, the second welding section 107 There is cushioning effect with the step structure of 105 antarafacial of scored region, and three's composition, the welding of two welding sections can be avoided to answer Heat affecting of the power to indentation 104 can also buffer from electrode inner terminal direction and transmit the external force of coming so that current interrupt device is more Add reliable.

Specifically, in two embodiments of the disclosure, as shown in Figure 2 or Figure 3, indentation part 101 includes from the indentation The boss 106 that area 105 is protruded, the first welding section 103 are formed on boss 106, and the indentation 104 being formed on scored region 105 encloses It is arranged around boss 106.The antarafacial of region both to realize, more specifically, the first welding section 103 is by boss 106 Upper surface formation is simultaneously parallel with scored region 105, and the outer peripheral edge of the upper surface is provided with annular solder joint.Accordingly, flip piece The first bonding pad 115 on 102 can be formed as accommodating the connecting hole of the boss 106.To by annular solder joint by boss The inner wall of outer peripheral edge and connecting hole securely welds.Wherein boss can be cylindrical-shaped structure, can also be in the axis of cylindrical-shaped structure There is through-hole structure to direction；In other embodiments, the two area can also be realized by various protrusions or recessed structure The antarafacial in domain is arranged.

Further, as shown in Fig. 2, in the first embodiment, in order to be electrically connected with the electrode inner terminal 109 of battery, Holding tank is arranged in the top of usual electrode inner terminal 109, is protruded in the same direction with boss for this purpose, the outer peripheral edge of scored region 105 is formed with Ring wall 108, the top edge of ring wall 108 is aligned in the height direction with the top edge of boss 106, wherein the second welding section 107 It is formed in the outer peripheral edge of ring wall 108 and is aligned in the height direction with the top edge of boss, is i.e. the top edge of the outer wall of the ring wall It is electrically connected to form the second welding section for the electrode inner terminal 109 with battery, the cell wall with the holding tank of electrode inner terminal 109 Shape coordinates and is welded by annular welds point, and in this embodiment, indentation part 101 can accommodate completely Into in the holding tank of electrode inner terminal 109, stabilized structure.That is, in first embodiment, the weldering of the first welding section 105 and second It is coplanar to meet area 107, and simultaneously with 105 antarafacial of scored region.

As shown in figure 3, in this second embodiment, holding tank is still set on electrode inner terminal 109, and indentation part 101 Boss 106 then stretch out the holding tank, specifically, the outer peripheral edge of scored region 105 is formed with the ring wall reversely protruded with boss 106 108, the second welding section 107 is formed in the outer peripheral edge of ring wall 108 and parallel with scored region 105, so that indentation part 101 is formed as Above-mentioned step structure is electrically connected wherein the outer peripheral edge of the second welding section 107 is formed with for the electrode inner terminal 109 with battery Annular solder joint, specifically, the lower surface of the second welding section 107 can be positioned on the bottom wall of holding tank, and outer peripheral edge and appearance The side wall of slot received is spot welded by annular welds, and same structure is firm.That is, in second embodiment, the first welding section 103, indentation The 107 equal antarafacial setting of area 105 and the second welding section.

Wherein in this second embodiment, as shown in figure 3, the side wall of boss and ring wall 108 hang down with scored region 105 respectively Directly, there can also be certain angle in other embodiment, such as form Z-shaped step.In addition, the first welding section 103, indentation Area 105 and the second welding section 107 can be respectively cyclic structure, i.e. the first welding section 103 has centre bore, in other embodiment party In formula, the first welding section 103 can not also have centre bore.

Above describe the indentation parts 101 in two kinds of embodiments, and the flip piece in two kinds of embodiments is described below 102。

Wherein, as shown in Figures 2 to 5, be formed on flip piece 102 for indentation part 101 is electrically connected first connect Area 115 and the second bonding pad 116 being electrically connected for the electrode external terminal 112 with battery, as shown in Figure 2 and Figure 5, this turns up Turn to be also formed with deformation buffer area 117 on part 102, deformation buffer area 117 is arranged in the first bonding pad 115 and the second bonding pad Between 116, and it is arranged around the first bonding pad 115.Wherein deformation buffer area refers to that the region can be first under external force It is deformed in itself in flip piece 102 itself, the first bonding pad 115, the second bonding pad 116 and indentation part 101, to slow Rush the external force.Then slow down impact of the external force for indentation 104 on the first bonding pad 115 and indentation part 101, promote electric current The reliability of interruption means.

Wherein, in two kinds of embodiments of the disclosure, flip piece 102 is to form tapered laminated structure, the taper Small end is 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.The pyramidal structure can be with By two bonding pad antarafacial settings, and it is capable of providing the space that 102 stress of flip piece is flipped up, to break indentation 104. In other possible embodiments, flip piece can also be flexible planar member etc..

As shown in Figure 2 and Figure 5, the deformation buffer area 117 in the disclosure is formed about the annular of the first bonding pad 115 Slot structure.So under external force, the effect of deformation buffer can be realized by the relative motion between the cell wall of annular groove. In other possible embodiments, deformation buffer area 117 can also be realized by the structures such as deformation chamber or elastic material.

As shown in Figure 2 and Figure 5, in the first embodiment, the radial section of ring channel structures is arc, such as direction electricity The semicircle of 112 protrusion of extreme outer.In this way, the external force come from the transmission of the second bonding pad 116 can pass through the cell wall of arc It deforms to absorb, then reduces the impact to the first bonding pad 115 and indentation part 101.In other possible embodiments, ring The section of shape slot can be with angle-style, i.e., there are two angled sides for section tool, can equally play cushioning effect.

As shown in figure 3, in this second embodiment, the boss 106 of indentation part 101 protrudes from this second embodiment The holding tank of electrode inner terminal.

As shown in Figures 2 and 3, in two embodiments of the disclosure, in order to guarantee by the gas of inside battery Effect, is sealedly connected with support ring 113 on the downside of the outer peripheral edge of flip piece 102 between cover board 110, electrode external terminal 112 it is outer Periphery is connected electrically on the upside of the outer peripheral edge of flip piece 102, and the gas generated in this way from inside battery can act on flip piece 102 On without leaking.And in order to make flip piece 102 be operating normally, electrode external terminal 112 be formed as capping structure and Through-hole 118 is could be formed with, for gas is discharged when flip piece 102 acts, to avoid being turned over anyway under gas pressure Turn part action.In addition cover board 110 charge and insulate two kinds of embodiments in, support ring 113 can select insulating materials or Conductive material supports.Normally, support ring 113 can for ceramic ring so that cover board 110 insulation and it is not charged.Specifically, it props up The inner wall of pushing out ring 113 is formed with support lugn 114, and the outer peripheral edge of flip piece 102 and electrode external terminal 112 is supported on support lugn 114 upper surface, to ensure the steady operation of current interrupt device.

The current interrupt device that the disclosure provides, including above-mentioned indentation part 101 and above-mentioned flip piece 102, indentation part 101 are electrically connected to each other by the first welding section 103 with flip piece 102.

The battery cover board assembly that the disclosure provides, as shown in fig. 6, the electricity including cover board 110, positioned at 110 inside of cover board Pole inner terminal 109 and the electrode external terminal 112 on the outside of the cover board 110, electrode inner terminal 109 and electrode external terminal 112 are logical Above-mentioned current interrupt device electrical connection is crossed, electrode external terminal 112 is electrically connected with flip piece 102, and indentation part 101 is connected electrically in On electrode inner terminal 109.

Wherein electrode inner terminal and the interior leading-out piece 120 being electrically connected with battery core welds, specifically can on interior leading-out piece 120 To form welding hole, electrode inner terminal 109 is formed as in column structure and the embedded welding hole to be welded with interior leading-out piece 120.Wherein In order to avoid cover board 110 charges, cover board insulating part 122 is provided between cover board 110 and interior leading-out piece 120, electrode inner terminal can To pass through the cover board insulating part to be welded with indentation part 101 with a gap, also to ensure that leakproofness, under support ring 113 End is welded on the cover board, wherein can be covered using Ceramics as material, to ensure the insulation of current interrupt device and cover board 110 Duct is then formed on plate, in order to the installation of current interrupt device.Also to ensure that the gas of inside battery can act on Onto flip piece 102, stomata 121 is formed on interior leading-out piece 120, so that gas can be applied to by the stomata 121 On flip piece 102.

The single battery that the disclosure provides, including shell 111, accommodate the upper of battery core inside the shell and package casing The battery cover board assembly stated, electrode inner terminal 109 are electrically connected with battery core, and flip piece 102 and the internal gas of shell connect It is logical.

The battery modules that the disclosure provides are provided with above-mentioned single battery in the battery modules.

The power battery that the disclosure provides, including backpack body and the above-mentioned battery modules that are arranged in the backpack body.

The electric vehicle that the disclosure provides, the electric vehicle are provided with above-mentioned power battery.

Five kinds of embodiments of the disclosure are described in detail above in association with attached drawing, 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 domain of the disclosure.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can The combination of energy no longer separately illustrates.

In addition, arbitrary 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 (17)

1. a kind of indentation part of current interrupt device, the indentation part (101) include the scored region (105) for being formed with indentation (104), The first welding section (103) for being electrically connected to each other with flip piece (102) and for being electrically connected with electrode inner terminal (109) Second welding section (107), the flip piece (102) can be acted under gas pressure with by breaking the indentation (104) It disconnects and being electrically connected with the indentation part (101), which is characterized in that the indentation (104) surrounds first welding section (103) simultaneously And it is arranged with the first welding section (103) and/or the second welding section (107) antarafacial.

2. indentation part according to claim 1, which is characterized in that the indentation (104) and the first welding section (103) and the Two welding sections (107) antarafacial is arranged.

3. indentation part according to claim 2, which is characterized in that the indentation part (101) includes from the scored region (105) boss (106) protruded, first welding section (103) are formed on the boss (106), indentation (104) shape It is arranged on the scored region (105) and around the boss (106).

4. indentation part according to claim 3, which is characterized in that first welding section (103) is by the boss (106) Upper surface formation is simultaneously parallel with the scored region, and the outer peripheral edge of the upper surface is provided with annular solder joint.

5. indentation part according to claim 4, which is characterized in that the outer peripheral edge of the scored region (105) is formed with and institute The ring wall (108) that boss (106) protrudes in the same direction is stated, second welding section (107) is formed in the outer peripheral edge of the ring wall (108) And it is aligned in the height direction with the top edge of the boss (106).

6. indentation part according to claim 1, which is characterized in that second welding section (107), the scored region (105), first welding section (103) is radially sequentially arranged from outside to inside, and is formed as moving closer to institute from outside to inside The step structure of flip piece (102) is stated, the indentation (104) is arranged around first welding section (103).

7. indentation part according to claim 6, which is characterized in that the indentation part (101) includes from the scored region (105) boss (106) protruded, first welding section (103) are formed on the boss (106), first welding section (103) it is formed by the boss (106) upper surface and parallel with the scored region, the outer peripheral edge of the scored region (105) is formed There are the ring wall (108) reversely protruded with the boss, second welding section (107) to be formed in the periphery of the ring wall (108) Edge is simultaneously parallel with the scored region (105), and the outer peripheral edge of second welding section (107) is formed with annular solder joint.

8. indentation part according to claim 7, which is characterized in that the side wall and the ring wall (108) of the boss (106) It is vertical with the scored region (105) respectively.

9. indentation part according to claim 1, which is characterized in that first welding section (103), the scored region (105) and second welding section (107) is respectively formed as cyclic structure.

10. a kind of current interrupt device, including indentation part (101) and flip piece (102), which is characterized in that the indentation part (101) it is the indentation part (101) according to any one of claim 1-9, the indentation part (101) passes through described first Welding section (103) is electrically connected to each other with the flip piece (102).

11. a kind of battery cover board assembly, including cover board (110), the electrode inner terminal (109) that is located on the inside of the cover board (110) and Electrode external terminal (112) on the outside of the cover board (110), the electrode inner terminal (109) and the electrode external terminal (112) It is electrically connected by current interrupt device, which is characterized in that the current interrupt device is according to electric current according to any one of claims 10 Interruption means, the electrode external terminal (112) are electrically connected with the flip piece (102), and the indentation part (101) is connected electrically in institute It states on electrode inner terminal (109).

12. battery cover board assembly according to claim 11, which is characterized in that under the outer peripheral edge of the flip piece (102) Support ring (113), the outer peripheral edge electrical connection of the electrode external terminal (112) are sealedly connected between side and the cover board (110) On the upside of the outer peripheral edge of the flip piece (102).

13. battery cover board assembly according to claim 12, which is characterized in that the inner wall of the support ring (113) is formed There is a support lugn (114), it is convex that the outer peripheral edge of the flip piece (102) and the electrode external terminal (112) is supported on the support The upper surface of edge (114).

14. 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 the battery cover according to claim 12 or 13 Board group part, the electrode inner terminal (109) are electrically connected with the battery core, and the flip piece (102) and the shell is interior Portion's gas connection.

15. a kind of battery modules, which is characterized in that be provided with monomer electricity according to claim 14 in the battery modules Pond.

16. a kind of power battery, including backpack body and the battery modules that are arranged in the backpack body, which is characterized in that the battery mould Group is according to the battery modules described in claim 15.

17. a kind of electric vehicle, which is characterized in that the electric vehicle is provided with power battery according to claim 16.