CN108511670B - Battery electrode component, cover plate component and battery - Google Patents

Battery electrode component, cover plate component and battery Download PDF

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Publication number
CN108511670B
CN108511670B CN201710110189.3A CN201710110189A CN108511670B CN 108511670 B CN108511670 B CN 108511670B CN 201710110189 A CN201710110189 A CN 201710110189A CN 108511670 B CN108511670 B CN 108511670B
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China
Prior art keywords
battery
temperature
cap
electrode terminal
conducting strip
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CN201710110189.3A
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Chinese (zh)
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CN108511670A (en
Inventor
鲁鹏
蒋露霞
王信月
胡世超
杨珂利
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BYD Co Ltd
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BYD Co Ltd
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Priority to CN201710110189.3A priority Critical patent/CN108511670B/en
Priority claimed from PCT/CN2017/117409 external-priority patent/WO2018153156A1/en
Publication of CN108511670A publication Critical patent/CN108511670A/en
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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/572Means for preventing undesired use or discharge
    • H01M50/574Devices or arrangements for the interruption of current
    • H01M50/581Devices or arrangements for the interruption of current in response to temperature
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • H01M50/15Lids or covers characterised by their shape for prismatic or rectangular cells
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00Safety devices for primary or secondary batteries
    • H01M2200/10Temperature sensitive devices
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a battery electrode assembly, a cover plate assembly and a battery. When the abnormal conditions such as collision, extrusion, overcharge and internal short circuit occur in the battery, the internal temperature of the battery rises, and when the temperature reaches 60-80 ℃, the temperature memory elastic element deforms and extends to push the conducting plate to break the connection between the electrode terminal and the conducting plate, so that the internal circuit of the battery is broken.

Description

Battery electrode component, cover plate component and battery
Technical Field
The invention relates to the field of battery safety protection, in particular to a battery electrode assembly, a cover plate assembly and a battery.
Background
At present, most batteries have no safety protection structure on the cover plate, and the cover plate is only used as a support pole. When the battery is subjected to an abusive condition such as impact, foreign matter piercing, or overheating, a series of complicated electrochemical reactions occur inside the battery. When these abnormalities are not effectively controlled and the battery is thermally out of control, the battery may be at risk of fire or even explosion. Through set up electrode terminals inside the battery among the prior art, the adaptor, the upset piece, support piece, interior lead-out piece, electrode terminals leads to and is connected with the adaptor electricity, be connected electrically between adaptor and the upset piece, welded connection between upset piece and the support piece, when the battery appears unusually, inside atmospheric pressure increases, the upset piece upset, support piece's nick is broken, form between electrode terminals and the interior lead-out piece and open a circuit, inside atmospheric pressure size is limited when the battery is unusual, then the ability of breaking after the upset piece upset is limited, the thickness of the weak department of requirement nick piece is relatively weak, therefore lead to the battery current capacity limited, the battery current capacity is relatively poor.
Disclosure of Invention
Aims to solve the problems that the battery has limited over-current capability due to limited internal air pressure when the battery is abnormal, limited overturning capability of the overturning sheet and the requirement on the thickness of the weak part of the nicking sheet in the prior art
The invention provides a battery electrode component, a cover plate component and a battery, which can improve the overcurrent capacity of the battery and the safety performance of the battery.
The invention provides a battery electrode assembly which comprises a cap, a conducting strip, an electrode terminal and at least one temperature memory elastic element, wherein the cap is electrically connected with the electrode terminal through the conducting strip, the temperature memory elastic element is arranged between the electrode terminal and the conducting strip, and the temperature memory elastic element can elastically extend to act on the conducting strip to disconnect the electrical connection between the electrode terminal and the cap when the temperature in a battery is higher than a preset temperature control threshold value.
In some embodiments, a part of the conductive sheet is connected with the end face of the electrode terminal to form a connection point, and the temperature memory elastic element elastically extends to jack up the conductive sheet when the internal temperature of the battery is higher than a preset temperature control threshold value so as to disconnect the connection point to disconnect the electrical connection between the electrode terminal and the cap.
In some embodiments, the conductive sheet is provided with a notch, and the temperature memory elastic element is arranged below the notch of the conductive sheet and can bounce open the notch weak part to disconnect the electrical connection between the electrode terminal and the cap when the internal temperature of the battery is higher than a preset temperature control threshold value.
Further, the battery electrode assembly comprises a support member, the support member is further arranged between the cap and the conductive sheet, a part of the conductive sheet is connected with the end face of the electrode terminal to form a connection point, and the notch is located between the support member and the connection point.
In some embodiments, the electrode terminal surface is provided with a groove, and the temperature memory elastic element is positioned in the groove.
In some embodiments, the lower surface of the cap and/or the temperature memory elastic element is/are provided with an insulating coating.
In some embodiments, the electrode assembly includes a conductive ring, the conductive ring is fixedly connected to both an outer periphery of the cap and an outer periphery of the conductive sheet, and the conductive sheet is recessed at a middle thereof and connected to the electrode terminal.
In some embodiments, the middle portion of the conductive sheet is welded to the electrode terminal.
In some embodiments, the non-connection part of the lower surface of the conductive sheet is provided with an insulating layer.
Further, the temperature memory elastic element is a spring-shaped memory alloy element.
Further, the preset temperature control threshold is 60-80 ℃.
The invention provides a cover plate assembly which comprises a cover plate body, an insulating sealing structure and a battery electrode assembly in any one of the embodiments, wherein a through hole is formed in the cover plate body, the battery electrode assembly is arranged at the through hole, an electrode terminal of the battery electrode assembly extends into a battery, and the electrode terminal and the cover plate body are sealed in an insulating mode through the insulating sealing structure.
The invention provides a battery, which comprises a battery shell, a battery core positioned in the battery shell and a cover plate assembly for packaging the battery shell, wherein the cover plate assembly is the cover plate assembly in any one of the embodiments.
Has the advantages that: according to the battery electrode assembly provided by the invention, the temperature memory elastic element is arranged between the electrode terminal and the conducting strip, and the temperature memory elastic element can elastically extend to act on the conducting strip to disconnect the electrical connection between the electrode terminal and the cap when the temperature in the battery is higher than a preset temperature control threshold value. When the abnormal conditions such as collision, extrusion, overcharge and internal short circuit occur in the battery, the internal temperature of the battery rises, and when the temperature reaches 60-80 ℃, the temperature memory elastic element deforms and extends to push the conducting plate to break the connection between the electrode terminal and the conducting plate, so that the internal circuit of the battery is broken.
Drawings
FIG. 1 is an exploded view of a cover plate assembly provided by an embodiment of the present invention;
FIG. 2 is a side view of a cover plate assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a battery according to an embodiment of the present invention;
FIG. 4 is an exploded view of a cover plate assembly (including a support member) according to an embodiment of the present invention;
FIG. 5 is a schematic side view of a cover plate assembly (including a support member) according to an embodiment of the present invention;
fig. 6 is a schematic view of the overall structure of a battery (including a support member) according to an embodiment of the present invention.
Description of reference numerals: a cap 11; a conductive sheet 12; a connection point 13; a temperature memory elastic element 14; a support 15; a cover plate body 21; a conductive ring 231; a ceramic ring 232 transition ring 233; an injection molding 234; a battery cell 31; a negative terminal 32; a positive electrode terminal 33; the tab 34 is drawn in.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "clockwise," "counterclockwise," and the like are used in the orientation or positional relationship indicated in the drawings for convenience and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the present invention provides a battery electrode assembly, which includes a cap 11, a conductive sheet 12, an electrode terminal, and at least one temperature memory elastic element 14, wherein the cap 11 is electrically connected to the electrode terminal through the conductive sheet 12, the temperature memory elastic element 14 is disposed between the electrode terminal and the conductive sheet 12, and the temperature memory elastic element 14 elastically extends to act on the conductive sheet 12 to disconnect the electrical connection between the electrode terminal and the cap 11 when the temperature inside the battery is higher than a preset temperature control threshold. According to the battery electrode assembly provided by the invention, the temperature memory elastic element 14 is arranged between the electrode terminal and the conducting strip 12, and the temperature memory elastic element 14 can elastically extend to act on the conducting strip 12 to disconnect the electrical connection between the electrode terminal and the cap 11 when the internal temperature of the battery is higher than a preset temperature control threshold value, so that the overcurrent capacity of the battery is improved by the design of the battery electrode assembly. When abnormal conditions such as collision, extrusion, overcharge and internal short circuit occur in the battery, the internal temperature of the battery rises, and when the temperature reaches 60 to 80 ℃, the temperature memory elastic element 14 deforms and extends, specifically as shown in fig. 2 or fig. 4, the temperature memory elastic element 14 pushes the conducting strip 12 upwards to disconnect the electrode terminal and the conducting strip 12, the triggering condition of the battery electrode assembly for protecting the battery is changed from pressure to temperature, the breaking force of the conducting strip 12 is enhanced through the temperature memory elastic element 14, the thickness of the conducting strip 12 is ensured on the premise of meeting the requirement of protecting the battery, the overcurrent capacity of the battery is improved, and the performance of the battery is optimized.
Further, a part of the conductive sheet 12 is connected with the end face of the electrode terminal to form a connection point 13, and in one embodiment of the present invention, as shown in fig. 3 or fig. 5, the temperature memory elastic element 14 can elastically extend and jack up the conductive sheet 12 when the internal temperature of the battery is higher than a preset temperature control threshold value, so as to break the connection point to break the electrical connection between the electrode terminal and the cap 11. The battery electrode component utilizes the temperature as a condition for triggering the action of the temperature memory elastic element 14, enhances the breaking force on the conducting strip 12, effectively protects the safety in the battery on the premise of meeting the requirement of protecting the battery, ensures the thickness of the conducting strip 12, improves the overcurrent capacity of the battery, and optimizes the performance of the battery.
In another embodiment of the present invention or as an optimized solution of the above embodiment, the conductive sheet 12 is provided with a notch, the temperature memory elastic element 14 is disposed below the notch of the conductive sheet 12, and the temperature memory elastic element 14 can bounce off the notch weak point to disconnect the electrical connection between the electrode terminal and the cap 11 when the internal temperature of the battery is higher than a preset temperature control threshold. The conductive sheet 12 with the nicks is beneficial to timely disconnecting the electric connection between the electrode terminal and the conductive sheet 12 by the temperature memory elastic element 14 when the battery is abnormal, and the safety in the battery is ensured. Further, the battery electrode assembly includes a supporter 15, the supporter 15 being disposed between the cap 11 and the conductive sheet 12, a portion of the conductive sheet 12 being connected to an end surface of the electrode terminal to form a connection point; the score is located between the support 15 and the point of attachment; as shown in fig. 4 and 6, the support 15 is made of an annular insulating material and is used for fixing the conductive sheet 12, so that the conductive sheet 12 can be better broken at the nick weak position when the temperature memory elastic element 14 extends to jack the conductive sheet 12; the scheme ensures the residual thickness of the nicks of the conducting strip and improves the overcurrent capacity of the battery.
Since the space inside the battery, particularly the space inside the electrode assembly, is small, in order to prevent the temperature-memorizing elastic element 14 from extending and popping out of the nicks when the temperature in the battery rises, the temperature-memorizing elastic element 14 is in contact with the cap 11, or the disconnected part of the conductive sheet 12 is turned upward and is in contact with the cap 11, and there is a case where the cap is not substantially electrically disconnected from the electrode terminal, further, it is preferable that the lower surface of the cap 11 and/or the temperature-memorizing elastic element 14 is provided with an insulating coating, and it is further preferable that the lower surface of the cap 11 is provided with an insulating coating to prevent the jacked up conductive sheet 12 from being in contact.
Preferably, the electrode assembly includes a conductive ring, the outer periphery of the cap and the outer periphery of the conductive sheet are both fixedly connected to the conductive ring, for example, an L-shaped seam allowance is formed on the outer end surface of the conductive ring, the outer periphery of the conductive sheet is embedded and supported in the L-shaped seam allowance, the cap is covered on the conductive ring and is hermetically connected to the outer periphery of the L-shaped seam allowance, and the conductive ring is electrically connected to the cap. The middle part of the conducting strip is sunken and connected with the electrode terminal, the connection can be positioned in a central hole of the conducting ring, the middle part of the conducting strip can also be positioned above the conducting strip, for example, the electrode terminal extends out of the central hole of the conducting ring to be connected with the conducting strip, and the middle part of the conducting strip is sunken to form the central hole of the conducting ring to be connected with the electrode terminal. The central part of the conducting strip is sunken and connected with the electrode terminal, and is generally connected with the end face of the electrode terminal. The connection may be a weld. As shown in fig. 2, 3 and 5, the middle of the circular conductive sheet 12 is welded to the middle of the end face of the electrode terminal, and laser welding may be used.
Further preferably, the lower surface of the conductive sheet 12 is provided with an insulating coating at a non-connection portion. The conductive sheet 12 is prevented from being electrically connected to the electrode terminal at a position other than the welding region, and the electrode terminal and the cap 11 are prevented from being electrically connected to each other due to the failure of the temperature memory elastic element 14.
The position of the temperature memory elastic element 14 is located between the electrode terminal and the conducting plate, and can be used as the conducting plate when extending at high temperature, as a further optimization scheme, the surface of the electrode terminal is provided with a groove, and the temperature memory elastic element 14 is located in the groove. As shown in fig. 5, the battery space can be further saved, the battery capacity can be improved, meanwhile, the temperature memory elastic element 14 can better sense the internal temperature of the battery, and can better act on the conducting strip, the sensitivity can be improved, the safety performance of the battery can be further ensured, specifically, the upper surface of the electrode terminal is provided with an annular groove near the edge part, and the temperature memory elastic element is arranged in the annular groove.
Further, the temperature memory elastic element 14 is a spring-shaped memory alloy element, the deformation temperature of the memory alloy element is preferably set to 60-80 degrees centigrade, and the material of the memory alloy element includes but is not limited to Ni-Mn-Ga-Gd alloy or Ni-Mn-Sn alloy. Further, the cross-sectional diameter of the temperature memory elastic element 14 is 2.1 mm, and the inner diameter of the temperature memory elastic element 14 is 10 mm.
The preset temperature control threshold value is the temperature at which the designed battery needs to realize the internal disconnection of the battery, and is related to the specification of the battery, the preset temperature control threshold value is preferably 60-80 ℃, and the safety of the battery is further ensured.
The invention also provides a cover plate assembly, which comprises a cover plate body 21, an insulating seal structure and the battery electrode assembly in any one of the embodiments, as shown in detail in fig. 2 and 5, the cover plate body 21 is provided with a through hole, the battery electrode assembly is arranged at the through hole, an electrode terminal of the battery electrode assembly extends into the battery, and the electrode terminal and the cover plate body 21 are sealed in an insulating seal structure in an insulating manner.
As shown in fig. 4 and 5, in the present embodiment, the ceramic ring 232 is specifically selected for insulation sealing, a specific structure may be that the inner end surface of the ceramic ring 232 is connected with the transition ring 233, the transition ring 233 is connected to the through hole of the cover plate body 21 through the transition ring 233, the transition ring 233 may be connected to the ceramic ring 232 through ceramic brazing, for example, the transition ring 233 has an inner ring and an outer ring forming a Z-shaped structure, the cover plate body 21 is formed with a through hole through which the electrode terminal passes, an end surface of the through hole is a step structure, the inner ring of the transition ring 233 is embedded and supported in the step structure, the outer periphery of the conductive ring 231 is connected to the cover plate body 21 through the ceramic ring 232 in a sealing manner, that is, sealing is achieved through respective sealing between the cover plate body 21 and the transition ring 233, between the transition ring 233 and the ceramic ring 232. The electrode terminal extends into the interior of the battery and is electrically connected with the internal lead-out piece in the battery to lead out current, and the lower surface of the cover plate body 21 is provided with an injection molding piece 234 for isolating and insulating the internal lead-out piece from the cover plate body 21.
The invention further provides a battery, which comprises a battery core 31 and the cover plate assembly in the above embodiment, and the electrode terminal is a positive terminal 33 and/or a negative terminal 32 of the battery. As shown in fig. 3, the cover plate body 21 is provided with 2 through holes for mounting the positive terminal 33 and the negative terminal 32. The positive electrode and the negative electrode of the present invention may be all of the electrode assemblies having the above-described structures, or any one of the electrode assemblies may be the electrode assembly having the above-described structure. An embodiment of the present invention is an electrode assembly having the above-described structure for the negative electrode. According to actual requirements and actual schemes. Further, the battery includes an inner lead tab enclosed at the edge of the electrode terminal, and the inner lead tab is used for electrically connecting the battery cell 31 and the electrode terminal. A specific embodiment is shown in fig. 3 and 6.
The following are two specific embodiments of the present invention;
specific example 1: as shown in fig. 1 to 3, when the battery is in abnormal conditions such as collision, extrusion, overcharge and internal short circuit, the temperature in the battery rises, and when the temperature reaches 60 to 80 degrees centigrade, the temperature memory elastic element 14 deforms and extends, and pushes the conducting strip 12 upwards, and the conducting strip 12 is jacked upwards, and the conducting strip 12 is disconnected with the welding point of the electrode terminal, the cap 11 is disconnected with the electrode terminal, then the positive terminal 33 and/or the negative pole are disconnected with the cap 11, so as to realize the disconnection of the internal circuit of the battery, cut off the contact between the abnormal battery and the external normal battery, isolate the normal battery, prevent the occurrence of larger potential safety hazard, effectively prevent the malignant chain reaction caused by the abnormal battery, improve the safety of the single battery, and further improve the safety coefficient of the whole battery module. The conductive sheet 12 is not scored. According to the design, the temperature memory elastic element 14 is used for enhancing the breaking force of the connecting point of the conducting strip 12 and the electrode terminal, so that the conducting strip 12 has stronger overcurrent capacity on the premise of meeting the protection of circuit breaking, and the overcurrent capacity in the battery is improved.
Specific example 2: as shown in fig. 4 to 6, the supporting member 15 is disposed on the conductive sheet 12, the conductive sheet 12 is provided with a notch on the lower surface, and the temperature memory elastic element 14 is disposed below the notch. When the internal temperature of the battery is increased when the internal temperature of the battery is abnormal, and the temperature reaches 60 to 80 ℃, the temperature memory elastic element 14 deforms and extends upwards, the temperature memory elastic element 14 jacks the conducting strip 12, the supporting piece 15 between the conducting strip 12 and the cap 11 fixes the conducting strip 12 in a certain condition, and after the elasticity of the temperature memory elastic element 14 exceeds a certain value, the nick weak part of the conducting strip 12 is disconnected, and the cap 11 is disconnected with the electrode terminal. Although the 2 caps 11 outside the battery are still connected by the connecting pieces, the positive terminal 33 and/or the negative terminal 32 are disconnected from the caps 11, and the caps 11 are disconnected from the positive electrode and/or the negative electrode of the battery. The support piece 15 is arranged to be beneficial to effectively disconnecting the electrode terminal from the cap 11 through the temperature memory elastic element 14, the design scheme enhances the breaking force of the temperature memory elastic element 14 on the weak part of the conducting strip 12 through the cooperation of the temperature memory elastic element 14 and the support piece 15, the thickness of the conducting strip 12 is ensured, the conducting strip 12 has strong overcurrent capacity, the overcurrent capacity in the battery is improved, and the battery performance is optimized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A battery electrode assembly is characterized in that the battery electrode assembly comprises a cap, a conducting strip, an electrode terminal and at least one temperature memory elastic element, the cap is electrically connected with the electrode terminal through the conducting strip, the temperature memory elastic element is arranged between the electrode terminal and the conducting strip, the temperature memory elastic element elastically extends to act on the conducting strip to disconnect the electrode terminal and the cap when the temperature inside the battery is higher than a preset temperature control threshold value, nicks are arranged on the conducting strip, the temperature memory elastic element is arranged below the nicks of the conducting strip, the temperature memory elastic element can flick the nicks to disconnect the electric connection between the electrode terminal and the cap when the temperature inside the battery is higher than the preset temperature control threshold value, the battery electrode assembly comprises a support piece, the support piece is arranged between the cap and the conducting strip, one part of the conducting strip is connected with the end face of the electrode terminal to form a connection point, and the nick is positioned between the support piece and the connection point; the temperature memory elastic element is a spring-shaped memory alloy element.
2. The battery electrode assembly of claim 1, wherein the electrode terminal surface is provided with a groove, and the temperature-memory elastic element is located in the groove.
3. The battery electrode assembly of claim 1, wherein the lower surface of the cap and/or the temperature memory elastic member is provided with an insulating coating.
4. The battery electrode assembly of claim 1, wherein the electrode assembly comprises a conductive ring, the outer circumference of the cap and the outer circumference of the conductive sheet are fixedly connected to the conductive ring, and the central portion of the conductive sheet is recessed and connected to the electrode terminal.
5. The battery electrode assembly according to claim 4, wherein the middle portions of the conductive sheets are welded to the electrode terminals.
6. The electrode assembly of claim 5, wherein the non-connection portion of the lower surface of the conductive sheet is provided with an insulating layer.
7. The battery electrode assembly of claim 1, wherein the predetermined temperature control threshold is 60-80 degrees celsius.
8. A cap plate assembly comprising a cap plate body, an insulating seal structure, and the battery electrode assembly of any one of claims 1 to 7, wherein the cap plate body is provided with a through hole, the battery electrode assembly is disposed at the through hole, an electrode terminal of the battery electrode assembly extends into the battery, and the electrode terminal of the battery electrode assembly is sealed with the cap plate body through the insulating seal structure.
9. A battery comprising a battery housing, a cell disposed in the battery housing, and a cover plate assembly enclosing the battery housing, wherein the cover plate assembly is the cover plate assembly of claim 8.
CN201710110189.3A 2017-02-27 2017-02-27 Battery electrode component, cover plate component and battery Active CN108511670B (en)

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CN201710110189.3A CN108511670B (en) 2017-02-27 2017-02-27 Battery electrode component, cover plate component and battery

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CN201710110189.3A CN108511670B (en) 2017-02-27 2017-02-27 Battery electrode component, cover plate component and battery
PCT/CN2017/117409 WO2018153156A1 (en) 2017-02-27 2017-12-20 Battery electrode assembly and cover plate assembly, and battery

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CN108511670B true CN108511670B (en) 2020-03-31

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111525083B (en) * 2020-05-28 2021-10-29 瑞声科技(南京)有限公司 Button cell
CN112212507A (en) * 2020-09-29 2021-01-12 宁波方太厨具有限公司 Heat exchanger and water heater comprising same

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1252170A (en) * 1997-04-10 2000-05-03 杜拉塞尔公司 Current interrupter for electrochemical cells
CN204854044U (en) * 2015-07-09 2015-12-09 四川中科百博太阳能科技有限公司 Solar energy flat plate collector's overheat protection device
CN206685462U (en) * 2017-02-27 2017-11-28 比亚迪股份有限公司 A kind of cell electrode assemblies, cover plate assembly and battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1252170A (en) * 1997-04-10 2000-05-03 杜拉塞尔公司 Current interrupter for electrochemical cells
CN204854044U (en) * 2015-07-09 2015-12-09 四川中科百博太阳能科技有限公司 Solar energy flat plate collector's overheat protection device
CN206685462U (en) * 2017-02-27 2017-11-28 比亚迪股份有限公司 A kind of cell electrode assemblies, cover plate assembly and battery

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