CN107394102A - Battery protecting apparatus, cover plate assembly and battery - Google Patents

Abstract

The invention provides a battery protection device, a cover plate assembly and a battery. The battery protection device includes a cover plate body and a temperature memory element, the cover plate body is provided with a vent hole, and the temperature memory element is electrically connected to the cover plate body And seal the vent hole, the temperature memory element has a low-temperature memory form disconnected from the first electrode terminal and a high-temperature memory form connected to the first electrode terminal, and the temperature memory element can be used when the internal temperature of the battery is higher than the preset temperature. When the temperature control threshold is set, it is transformed from a low-temperature memory form to a high-temperature memory form. In the battery protection device of the present invention, when the internal temperature of the battery exceeds the preset temperature threshold value of the temperature memory element, a short circuit is formed between the first electrode terminal and the second electrode terminal, and the impedance of the structure of the cover body and the temperature memory element is used. The residual energy of the battery is consumed, minimizing the risk of battery fire or explosion.

Description

Battery protection device, cover assembly and battery

technical field

The invention belongs to the technical field of battery safety protection, and in particular relates to a battery protection device, a cover plate assembly and a battery.

Background technique

At present, most batteries have no safety protection structure on their cover plates, and the cover plates are only used as supporting poles. When the battery is subjected to abuse conditions such as impact, foreign object puncture or overheating, a series of complex electrochemical reactions will occur inside the battery. When these abnormalities are not effectively controlled and thermal runaway occurs in the battery, the battery may catch fire or even explode.

Taiwan patent TW093118829 discloses a battery protection device, the battery has at least two conductive terminals and at least one conductive lead, and the conductive lead keeps in contact with the conductive terminals to connect the circuit. The battery protection device includes at least one disconnection unit. When the ambient temperature is higher than a predetermined temperature, the disconnection unit deforms and separates the conductive lead from the conductive terminal to cut off the circuit. The battery protection device can separate the conductive lead from the conductive terminal through the deformation of the breaking unit to cut off the circuit when the battery is thermally runaway, thereby protecting the battery.

However, the above-mentioned battery protection device only cuts off the circuit when the battery is thermally runaway. When the circuit is cut off, because the battery power does not decrease, complex electrochemical reactions are often still going on inside the battery. In this way, the risk of battery fire or even explosion remains. larger.

Contents of the invention

The technical problem to be solved by the present invention is aimed at the existing battery protection device that adopts the method of cutting off the circuit to protect the battery. When the battery is thermally out of control and the circuit is cut off, the battery power is not reduced, and the risk of causing the battery to catch fire or even explode is still relatively high. The invention provides a battery protection device.

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

A battery protection device is provided, the battery has a first electrode terminal and a second electrode terminal, one of the first electrode terminal and the second electrode terminal is a positive terminal, and the other is a negative terminal, the battery protection device includes a cover plate The main body and the temperature memory element, the cover body is provided with a vent hole, the temperature memory element is electrically connected to the cover body and seals the vent hole, and the temperature memory element has a low temperature that is disconnected from the first electrode terminal A memory form and a high-temperature memory form connected to the first electrode terminal, the temperature memory element can be transformed from a low-temperature memory form to a high-temperature memory form when the internal temperature of the battery is higher than a preset temperature control threshold.

Further, the first electrode terminal is a negative terminal, and the second electrode terminal is a positive terminal.

Further, the temperature memory element is a memory alloy or a bimetallic sheet.

Further, the value range of the preset temperature control threshold is 80-250°C.

Further, the battery protection device further includes a short-circuit resistor electrically connected between the cover body and the second electrode terminal.

Further, the value range of the resistance R of the short-circuit resistor is:

1/(2Ic)<R<5/Ic, where Ic represents the value of the charging current of the battery.

According to the battery protection device of the present invention, the temperature memory element is electrically connected to the cover plate body and seals the vent hole, and the temperature memory element has a low-temperature memory form disconnected from the first electrode terminal of the battery and a conductive electrode connected to the first electrode terminal. High-temperature memory form, when the internal temperature of the battery exceeds the preset temperature threshold of the temperature memory element, the temperature memory element is deformed according to the "memory" to the high-temperature memory form that has been pre-basically processed, and the temperature memory element is connected to the first electrode terminal. In this way, the first electrode terminal, the cover body and the second electrode terminal are connected, and then a short circuit is formed between the first electrode terminal and the second electrode terminal, which realizes the internal short circuit of the battery, and then can cut off the external abnormal circuit, and the battery Isolate it to prevent greater safety hazards from occurring, and prevent chain hazards caused by abnormal batteries. The whole abnormality starts from the abnormal battery and ends at the abnormal battery, so as to minimize the risk of battery abuse. Moreover, when a short circuit occurs, the residual energy of the battery is consumed by the impedance of the cover body and the temperature memory element, which minimizes the risk of battery fire or explosion.

In addition, the present invention also provides a cover assembly, including a first electrode terminal, a second electrode terminal, a first insulating and sealing structure for insulating and sealing between the first electrode terminal and the cover body, and a first insulating and sealing structure for the first electrode terminal and the cover body. The second sealing structure for sealing between the second electrode terminal and the cover plate body and the above battery protection device, the cover plate body is provided with a first through hole and a second through hole, the first electrode terminal and the second through hole The two electrode terminals are plugged into the first through hole and the second through hole respectively.

Further, the cover plate assembly also includes a first lead-out piece connected to the outer end of the first electrode terminal, the temperature memory element is disconnected from the first lead-out piece in the low-temperature memory state, and is The shape is in contact with the first external lead-out piece.

Further, the cover plate assembly also includes a short-circuit resistor and a second lead-out piece connected to the outer end of the second electrode terminal, the short-circuit resistor is electrically connected between the cover plate body and the second lead-out piece between.

Further, a metal plating layer is provided on a surface of the temperature memory element facing the contact piece.

Further, the temperature memory element is provided with a non-metallic protective coating on the surface other than the metal coating.

Further, the first insulating sealing structure includes a first insulating ring, a first disc and a first insulating sealing member which are sequentially sleeved on the first electrode terminal from outside to inside, and the first insulating ring is fixed on the On the first electrode terminal, the inner edge of the first disc is arranged between the first insulating seal and the first insulating ring, and the outer edge of the first disc is arranged on the first insulating ring. Between the seal and the cover body, the first insulating seal is connected between the cover body and the first inner lead-out piece, and the first inner lead-out piece is fixed on the inner end of the first electrode terminal .

Further, the second sealing structure includes a second insulating ring, a second disc, and a second insulating seal that are sequentially sleeved on the second electrode terminal from outside to inside, and the second insulating ring is fixed on the second electrode terminal. On the second electrode terminal, the inner edge of the second disc is set between the second insulating seal and the second insulating ring, and the outer edge of the second disc is set between the second insulating seal Between the cover plate body and the cover plate body, the second insulating seal is connected between the cover plate body and the second inner lead-out piece, and the second inner lead-out piece is fixed on the inner side end of the second electrode terminal.

In addition, the present invention also provides a battery, which includes the above-mentioned cover assembly.

Description of drawings

Fig. 1 is a schematic structural view of a cover assembly provided by an embodiment of the present invention;

Fig. 2 is a normal working state of the battery protection device provided by an embodiment of the present invention (memory alloy is in a low-temperature memory state);

Fig. 3 is a short-circuit state of the battery protection device provided by an embodiment of the present invention (the memory alloy is in a high-temperature memory state);

Fig. 4 is a partial enlarged view of the cover assembly provided by an embodiment of the present invention near the second electrode terminal.

The reference signs in the instructions are as follows:

1. Cover body; 101. First through hole; 102. Second through hole; 103. Vent hole; 104. Liquid injection hole; 2. First electrode terminal; 201. First buffer ring; 3. First inner Lead-out piece; 4. First outer lead-out piece; 401. Contact piece; 5. Second electrode terminal; 501. Second buffer ring; 6. Second inner lead-out piece; 7. Second outer lead-out piece; 8. Memory alloy ; 9, short circuit resistance; 10, first insulating sealing structure; 11, second sealing structure; 12, explosion-proof valve; 13, liquid injection hole protection structure; 14, first insulating ring; 15, first disc; 16, 17. The first welding protection sheet; 18. The second insulating ring; 19. The second disc; 20. The second insulating sealing piece; 21. The second welding protection sheet.

detailed description

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, the cover assembly provided by an embodiment of the present invention includes a cover body 1, a first electrode terminal 2, a first inner lead-out piece 3, a first outer lead-out piece 4, a second electrode terminal 5, a first Two inner lead-out sheets 6, second outer lead-out sheets 7, memory alloy 8, short-circuit resistor 9, first insulating sealing structure 10 for insulating sealing between the first electrode terminal 2 and the cover plate body 1 and for the second A sealed second sealing structure 11 between the electrode terminal 5 and the cover body 1 . Wherein, the cover body 1 , memory alloy 8 and short circuit resistor 9 constitute a battery protection device. The short circuit resistor 9 is electrically connected between the cover body 1 and the second lead-out piece 7 .

In this embodiment, the value range of the resistance R of the short-circuit resistor 8 is:

1/(2Ic)<R<5/Ic (1);

Among them, Ic represents the numerical value of the charging current of the battery. The unit of the charging current Ic is at the same level as the unit of the resistance R, that is, if the unit of Ic is ampere, the unit of the resistance R of the short-circuit resistance is ohms; if the unit of Ic is mA, the resistance R of the short-circuit resistance is The unit is milliohm. In formula (1), Ic only represents the numerical value. The optimal range of resistance R of the short-circuit resistance in formula (1) is designed according to different charging power sources, so that excessive Joule heat generated by the short-circuit resistance can be reduced.

In this embodiment, the temperature memory element is memory alloy 8 . As shown in Figure 1, the cover body 1 is provided with a first through hole 101 and a second through hole 102, and the first electrode terminal 2 and the second electrode terminal 5 are plugged into the first through hole respectively. 101 and the second through hole 102, the first inner lead-out piece 3 and the second inner lead-out piece 6 are respectively welded to the inner ends of the first electrode terminal 2 and the second electrode terminal 5, and the first outer lead-out piece The piece 4 and the second lead-out piece 7 are welded to the outer ends of the first electrode terminal 2 and the second electrode terminal 5 respectively.

As shown in Figures 1 and 2, the cover body 1 is provided with a vent hole 103, the memory alloy 8 is fixed on the edge of the vent hole 103 by welding or riveting and seals the vent hole 103, Under the condition of ensuring the connection strength, the connection area between the memory alloy 8 and the cover body 1 should be as small as possible. The end of the first lead-out piece 4 away from the first electrode terminal 2 is bent toward the cover body 1 to form a contact piece 401 facing the temperature memory element. Because the contact piece 401 is formed by bending the first outer lead-out piece 4 to the direction of the cover plate body 1, and then the contact piece 401 is closer to the memory alloy 8, thus reducing the time from disconnection to contact between the memory alloy 8 and the contact piece 401. , The deformation of memory alloy 8.

In this embodiment, the memory alloy 8 has a low-temperature memory form (state shown in FIG. 2 ) disconnected from the first electrode terminal 2 and a high-temperature memory form (state shown in FIG. 3 ) connected to the first electrode terminal 2. , the memory alloy 8 is disconnected from the first lead-out piece 4 in the low-temperature memory form shown in FIG. Contact conduction. The memory alloy 8 can be transformed from the low-temperature memory form shown in FIG. 2 to the high-temperature memory form shown in FIG. 3 when the internal temperature of the battery is higher than the preset temperature control threshold.

In this embodiment, the memory alloy 8 is preferably a two-way memory alloy. Of course, in other embodiments, it may also be a one-way memory alloy or a full-range memory alloy. Memory alloys can be but not limited to Cu-based, Ni-based or Fe-based memory alloys.

In this embodiment, the value range of the preset temperature control threshold is 80-250°C. A further preferred range is 80-150°C. That is, when thermal runaway occurs in the battery and the internal temperature rises rapidly to a value between 80-250°C, memory alloy 8 is deformed from the low-temperature memory form shown in FIG. 2 to the high-temperature memory form shown in FIG. The contact between the contact piece 401 of an outer lead-out piece 4 and the memory alloy 8 conducts the first electrode terminal 2 with the cover plate body 1, and due to the short circuit resistor 9 is electrically connected between the cover plate body 1 and the second outer lead-out piece 7 At this time, the first electrode terminal 2 and the second electrode terminal 5 are short-circuited.

In this embodiment, as shown in FIG. 1 , the cover body 1 is further provided with a liquid injection hole 104 and an explosion-proof valve 12 , and a liquid injection hole protection structure 13 is provided outside the liquid injection hole 104 .

In this embodiment, in order to ensure good contact between the first lead-out piece 4 and the memory alloy 8 and low enough contact resistance, the surface of the memory alloy 8 facing the contact piece 401 of the first lead-out piece 4 is provided with a metal plating layer. The metal plating here includes but is not limited to gold, silver, nickel and other materials with superior electrical conductivity and stable chemical properties. Silver plating is preferred here, since it can meet the low impedance requirement and can control the product cost well. The thickness of the metal plating layer is 5 μm to 60 μm, more preferably 8 to 20 μm.

In this embodiment, in order to prevent the active elements in the memory alloy 8 from participating in the electrochemical reaction, a non-metallic protective coating, such as PPS, PPO and fluorocarbon coating, is provided on the surface of the memory alloy 8 other than the metal coating. When the thickness of the non-metallic protective coating is less than 30 μm, due to the compactness of the non-metallic protective coating, the electrolyte inside the battery will infiltrate, which may lead to partial failure of the non-metallic protective coating. When the thickness of the non-metallic protective coating is too thick, deformation of the memory alloy 8 is likely to cause cracks on the surface of the non-metallic protective coating, and the cost will also increase. Therefore, the thickness of the non-metallic protective coating is preferably 30-300 μm, more preferably 50-150 μm.

In this embodiment, as shown in FIG. 2, the first insulating sealing structure 10 includes a first insulating ring 14, a first disc 15 and a first An insulating seal 16, the first insulating ring 14 is fixed on the first electrode terminal 2, and the inner edge of the first disc 15 is arranged between the first insulating seal 16 and the first insulating ring 14 Between, the outer edge of the first disc 15 is arranged between the first insulating seal 16 and the cover body 1, and the first insulating seal 16 is connected between the cover body 1 and the first inner Between the lead-out pieces 3 , the first inner lead-out piece 3 is fixed on the inner end of the first electrode terminal 2 . A first buffer ring 201 is formed on the outer periphery of the first electrode terminal 2, and the first buffer ring 201 is welded on the first insulating ring 14, and the first buffer ring 201 can buffer the first electrode terminal 2. Welding stress with the first insulating ring 14. In addition, a first welding protection sheet 17 is also provided between the first insulating seal 16 and the first inner lead sheet 3 to protect the welding of the first electrode terminal 2 and the first inner lead sheet 3 and prevent the first inner lead sheet from 3 Damaged during welding. During specific assembly, the outer surface of the first insulating ring 14 is welded on the first buffer ring 201, the inner edge of the first disc 15 is welded on the inner surface of the first insulating ring 14, and the first disc The outer edge of 15 is welded on the inner surface of the cover body 1, the first insulating seal 16 is inserted into the inner cavity of the first disc 15, the first inner lead-out piece 3 is welded to the inner end of the first electrode terminal 2, and This supports the first insulating seal 16 .

In this embodiment, the first insulating and sealing structure 10 and the second sealing structure 11 adopt a similar structure, that is, as shown in FIG. 5, the second insulating ring 18, the second disc 19 and the second insulating seal 20, the second insulating ring 18 is fixed on the second electrode terminal 5, and the inner edge of the second disc 19 It is arranged between the second insulating seal 20 and the second insulating ring 18, the outer edge of the second disc 19 is arranged between the second insulating seal 20 and the cover body 1, and the first Two insulating seals 20 are connected between the cover body 1 and the second inner lead-out piece 6 , and the second inner lead-out piece 6 is fixed on the inner side of the second electrode terminal 5 . A second buffer ring 501 is formed on the outer circumference of the outer end of the second electrode terminal 5, and the second buffer ring 501 is welded on the second insulating ring 18, and the second buffer ring 501 can buffer the second electrode terminal 2. The welding stress with the second insulating ring 16. In addition, a second welding protection sheet 21 is also provided between the second insulating seal 20 and the second inner lead sheet 6 to protect the welding of the second electrode terminal 5 and the second inner lead sheet 6 and prevent the second inner lead sheet from 6 was damaged during welding. During specific assembly, the outer surface of the second insulating ring 18 is welded on the second buffer ring 501, the inner edge of the second disc 19 is welded on the inner surface of the second insulating ring 18, and the second disc The outer edge of 19 is welded on the inner surface of the cover body 1, the second insulating seal 20 is inserted into the inner cavity of the second disc 19, the second inner lead-out piece 6 is welded to the inner end of the second electrode terminal 5, and This supports the second insulating seal 20 .

In this embodiment, the first insulating ring 14 and the second insulating ring 18 may be ceramic insulating rings. Both the first disc 15 and the second disc 19 are annular metal discs to provide good support.

Of course, in other embodiments, the first insulating sealing structure 10 and the second sealing structure 11 may also adopt different structures, that is, the second sealing structure 11 may not provide insulation between the cover body 1 and the second electrode terminal 5 . Of course, the first insulating and sealing structure 10 and the second sealing structure 11 can also adopt other conventional structural forms.

In addition, preferably, in this embodiment, the first electrode terminal 2 is a negative terminal, and the second electrode terminal 5 is a positive terminal. Correspondingly, the first inner lead-out sheet 3 and the first outer lead-out sheet 4 are the negative inner lead-out sheet and the negative electrode outer lead-out sheet, and the second inner lead-out sheet 6 and the second outer lead-out sheet 7 are the positive electrode inner lead-out sheet and the positive electrode outer lead-out sheet . In this way, the short-circuit resistor 9 is connected between the positive electrode lead-out piece and the cover plate body 1, and the memory alloy 8 is opposite to the negative electrode lead-out piece.

Of course, in other embodiments, it can also be reversed, that is, the first electrode terminal 2 is a positive terminal, and the second electrode terminal 5 is a negative terminal. Since the cover plate body 1 is connected to the battery case, when the second electrode terminal is the negative terminal, the short-circuit resistor is connected between the negative lead-out piece and the cover plate body, so that the negative terminal and the case are connected, and the The phenomenon of lithium precipitation occurs, resulting in a decrease in battery capacity. Therefore, in this embodiment, preferably, the phenomenon of lithium precipitation is avoided by other means.

The principle of the battery protection device in the above embodiment is as follows:

When the battery is subjected to abuse conditions such as impact, foreign object puncture, or overheating, the battery will run away thermally, and the internal temperature of the battery will increase as the thermal runaway occurs. When the internal temperature exceeded the preset temperature threshold of the memory alloy 8, the metallographic structure of the memory alloy 8 changed, and according to the "memory" deformation to the high-temperature memory form (the form shown in Figure 3) that carried out the basic treatment in advance, the memory alloy 8 is in contact with the first lead-out piece 4, thereby connecting the first electrode terminal 2, the first lead-out piece 4, the cover body 1, the short circuit resistor 9, the second lead-out piece 7 and the second electrode terminal 5 Conduction, and then form a short circuit between the first electrode terminal 2 and the second electrode terminal 5, realize the internal short circuit of the battery, and then can cut off the external abnormal circuit, isolate the battery, prevent greater safety hazards from occurring, and prevent abnormal The battery causes chain hidden dangers. The whole abnormality starts from the abnormal battery and ends at the abnormal battery, so as to minimize the risk of battery abuse. Moreover, when a short circuit occurs, the residual energy of the battery is consumed by the short circuit resistance, the impedance of the cover body and memory alloy, and the risk of battery fire or explosion is minimized.

In addition, in other embodiments, the memory alloy in the above-mentioned embodiments may also be replaced by elements having a similar shape-memory function such as a bimetallic sheet.

In addition, in other embodiments, the short-circuit resistor may also be eliminated, and the second electrode terminal or the second lead-out piece may be directly electrically connected to the cover body. Since there is no need for insulation between the second electrode terminal and the cover body, in this embodiment, the second sealing structure may not include the second insulating ring.

In addition, the present invention also provides a battery, which includes a casing, a pole core and the above-mentioned cover plate assembly. The pole core is obtained by winding a positive electrode sheet, a separator and a negative electrode sheet. The cover plate assembly is inserted from the opening of the housing and fixed with the housing, and the electrolyte is injected into the closed space between the cover plate assembly and the housing through the liquid injection hole on the cover plate assembly. Positive pole tabs and negative pole tabs are arranged on the positive pole piece and the negative pole piece.

If the first electrode terminal 2 is a positive terminal, the first inner lead-out piece is connected to the positive pole lug, and the second inner lead-out piece is connected to the negative pole lug.

Conversely, if the first electrode terminal 2 is a negative terminal, then the first inner lead-out piece is connected to the negative pole lug, and the second inner lead-out piece is connected to the positive pole lug.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (16)

1. a kind of battery protecting apparatus, the battery has first electrode terminal and second electrode terminal, the first electricity One in extreme son and second electrode terminal is positive terminal, and another is negative terminal, it is characterised in that The battery protecting apparatus includes cover board body and temperature memory element, and ventilation is provided with the cover board body Hole, the temperature memory element electrically connect with cover board body and seal the passage, the temperature memory member There is part the low temperature memory configuration disconnected with first electrode terminal and the high temperature turned on first electrode terminal to remember Form, the temperature memory element can be remembered when internal temperature of battery is higher than default temperature control threshold values by low temperature Model deformation is to high temperature memory configuration.

2. battery protecting apparatus according to claim 1, it is characterised in that the first electrode terminal For negative terminal, the second electrode terminal is positive terminal.

3. battery protecting apparatus according to claim 1, it is characterised in that the temperature memory element For memorial alloy or bimetal leaf.

4. battery protecting apparatus according to claim 1, it is characterised in that the default temperature control threshold values Span be 80-250 DEG C.

5. according to the battery protecting apparatus described in claim 1-4 any one, it is characterised in that the electricity Pond protection device also includes the short circuit electricity being connected electrically between the cover board body and the second electrode terminal Resistance.

6. battery protecting apparatus according to claim 5, it is characterised in that the resistance of the short-circuit resistance Value R spans are：

1/(2Ic)<R<5/Ic, wherein, Ic represents the numerical value of the charging current of battery.

7. a kind of cover plate assembly, it is characterised in that including first electrode terminal, second electrode terminal, be used for First insulation and sealing structure of insulated enclosure between the first electrode terminal and cover board body, for described Described in the second seals structure and claim 1-4 any one sealed between two electrode terminals and cover board body Battery protecting apparatus, be provided with first through hole and the second through hole, the first electrode on the cover plate main body Terminal and second electrode terminal are plugged in the first through hole and the second through hole respectively.

8. cover plate assembly according to claim 7, it is characterised in that the cover plate assembly also includes the Lead-out tablet in lead-out tablet and second in one, lead-out tablet is connected to institute in lead-out tablet and second in described first State the medial extremity of first electrode terminal and second electrode terminal.

9. cover plate assembly according to claim 7, it is characterised in that the cover plate assembly also includes connecting The first outer lead-out tablet of the outboard end of the first electrode terminal is connected on, the temperature memory element is remembered in low temperature Recall form to disconnect with the described first outer lead-out tablet, and contacted in high temperature memory configuration with the described first outer lead-out tablet Conducting.

10. the cover plate assembly according to claim 7 or 9, it is characterised in that the cover plate assembly is also The second outer lead-out tablet including short-circuit resistance and the outboard end for being connected to the second electrode terminal, the short circuit Resistance is connected electrically between the cover board body and the second outer lead-out tablet.

11. cover plate assembly according to claim 9, it is characterised in that the temperature memory element Edge is fixed on the passage edge on the cover board body, and the first outer lead-out tablet is away from the described first electricity One end of extreme son is bent to form the contact chip opposite with the temperature memory element to cover board body direction.

12. cover plate assembly according to claim 11, it is characterised in that the temperature memory element court To a side surface of the contact chip, the coat of metal is set.

13. cover plate assembly according to claim 12, it is characterised in that the temperature memory element is set It is equipped with the surface beyond the coat of metal and nonmetallic protective coating is set.

14. cover plate assembly according to claim 8, it is characterised in that the first insulated enclosure knot Structure includes ecto-entad and is sequentially sleeved at the first dead ring on the first electrode terminal, the first disk and the One insulating sealer, first dead ring are fixed on the first electrode terminal, first disk Interior edge is arranged between first insulating sealer and the first dead ring, and the outer of first disk is set Between first insulating sealer and cover board body, first insulating sealer is connected to the cover plate In body and first between lead-out tablet, lead-out tablet is fixed on the inner side of the first electrode terminal in described first End.

15. cover plate assembly according to claim 8, it is characterised in that the second seals structure bag Include the second dead ring, the second disk that ecto-entad is sequentially sleeved on the second electrode terminal and second exhausted Edge seal, second dead ring are fixed on the second electrode terminal, the interior edge of second disk It is arranged between second insulating sealer and the second dead ring, the outer of second disk is arranged on institute State between the second insulating sealer and cover board body, second insulating sealer is connected to the cover board body With second between lead-out tablet, lead-out tablet is fixed on the medial extremity of the second electrode terminal in described second.

16. a kind of battery, it is characterised in that including the cover plate assembly described in claim 7-15 any one.