CN118017168A - Battery monomer, battery and power consumption device - Google Patents
Battery monomer, battery and power consumption device Download PDFInfo
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- CN118017168A CN118017168A CN202410426280.6A CN202410426280A CN118017168A CN 118017168 A CN118017168 A CN 118017168A CN 202410426280 A CN202410426280 A CN 202410426280A CN 118017168 A CN118017168 A CN 118017168A
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- top plate
- pole
- battery
- battery cell
- electrically connected
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- 239000004020 conductor Substances 0.000 claims abstract description 9
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
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- 229910017052 cobalt Inorganic materials 0.000 description 1
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- MFIWAIVSOUGHLI-UHFFFAOYSA-N selenium;tin Chemical compound [Sn]=[Se] MFIWAIVSOUGHLI-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The present disclosure relates to a battery cell, a battery, and an electric device. A battery cell comprising: a housing containing the electrical core therein, and the top plate is an electrical conductor; the first pole is electrically connected with the first pole lug, the first pole lug is arranged on the outer surface of the top plate, the first pole lug is insulated from the top plate through a first insulating piece arranged on the top plate, and the first pole lug is electrically connected with the electric core; a second pole electrically connected to the second pole, the second pole being disposed on an outer surface of the top plate, the second pole being insulated from the top plate by a second insulating member disposed on the top plate, the second pole being electrically connected to the battery cell; and at least one electrical connection assembly disposed on an exterior of the top plate configured to electrically connect at least one of the first pole and the second pole with the top plate in response to the top plate being displaced outwardly in response to the internal air pressure of the housing reaching or exceeding a pressure threshold. According to the present disclosure, when thermal runaway occurs in a certain cell in the battery, the entire battery can continue to supply power to the load.
Description
Technical Field
The application relates to the field of batteries, in particular to a battery monomer, a battery and an electricity utilization device.
Background
Batteries are increasingly used in various industries such as automobiles, and are beneficial to energy conservation and emission reduction. The battery may be composed of a plurality of battery cells, each of which contains an electric core. During use, one or more of the cells in the battery may experience thermal runaway, which may result in the entire battery not continuing to function.
Disclosure of Invention
In view of the foregoing, the present disclosure provides a battery cell, a battery, and an electric device that enable the battery to continue to operate when thermal runaway of one or several cells of the battery occurs.
In a first aspect, the present disclosure provides a battery cell, comprising: a housing, an interior of the housing containing a battery cell, and a top plate of the housing being an electrical conductor; a first pole electrically connected to the first tab, the first pole being disposed on an outer surface of the top plate, the first pole being insulated from the top plate by a first insulating member disposed on the top plate, and the first tab being electrically connected to the battery cell; a second pole electrically connected to a second tab, the second pole being disposed on an outer surface of the top plate, the second pole being insulated from the top plate by a second insulating member disposed on the top plate, the second tab being electrically connected to the electrical core; and at least one electrical connection assembly disposed on an exterior of the top plate, the at least one electrical connection assembly configured to electrically connect at least one of the first and second poles with the top plate in response to the top plate being displaced outwardly if an internal air pressure of the housing meets or exceeds a pressure threshold.
In a second aspect, the present disclosure provides a battery comprising the battery cell of the above embodiments.
In a third aspect, the present disclosure provides an electrical device comprising a battery as in the above embodiments for providing electrical energy.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
fig. 1 illustrates a schematic structure of a battery cell according to one embodiment of the present disclosure.
Fig. 2 illustrates a schematic structure of a battery cell according to an embodiment of the present disclosure.
Fig. 3 illustrates a schematic structure of a battery cell according to an embodiment of the present disclosure.
Fig. 4 illustrates a schematic structure of a battery cell according to one embodiment of the present disclosure.
Fig. 5 illustrates a schematic structure of a battery cell according to an embodiment of the present disclosure.
Fig. 6 illustrates a schematic structure of a battery cell according to an embodiment of the present disclosure.
Reference numerals in the specific embodiments are as follows:
housing 101
Top plate 102
Battery cell 1
First pole 104
Second pole 106
First insulator 105
Second insulator 107
Thermistor 103
First thermistor 108
Second thermistor 109
First part 110
Second part 111
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.
In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
The battery may be composed of a plurality (e.g., several tens, hundreds) of battery cells, each of which contains an electric cell, each of which may be individually discharged and charged. During use of the battery, thermal runaway may occur in one or more cells in the battery, which may result in the failure of the entire battery to continue to operate.
As an example, for example, in a use scenario of an electric automobile, when the automobile recognizes that a certain battery cell is out of control, a tab of the battery cell may break. At this time, if the entire battery is maintained in a powered-on state or is powered-on later, there is a possibility that a reverse high voltage is formed at the tab fracture, resulting in breakdown of the battery cell, causing fire outside the battery, and causing a safety problem. If the tab of the battery cell is not broken, the battery cell may overheat and cause ignition if the power-on state of the entire battery is maintained or the power-on is performed later. Therefore, once a certain battery cell is identified to generate thermal runaway, the control system of the whole automobile adopts immediate power-down treatment to stop the discharging of the whole battery, so that the automobile cannot continue to run. Similar problems exist in other use scenarios than automobiles.
In order to enable the whole battery to continue to supply power to a load under the condition that a certain electric core in the battery is out of control thermally, the technical scheme of the disclosure is provided. In the present disclosure, in the event that a thermal runaway occurs in a certain cell, the cell can be made to be a resistor in the circuit of the entire battery, at least a portion of the discharge current of the cell of the entire battery that is not subject to thermal runaway will continue to power the load via (i.e., flow through) the metal casing of the cell, so that the entire battery can continue to power the load.
Fig. 1 shows a schematic structure of a battery cell 1 according to an embodiment of the present disclosure. As shown in fig. 1, the battery cell 1 includes a case 101, a first pole 104, and a second pole 106. The interior of the housing 101 may house a battery cell (not shown), which is a component capable of discharging and charging.
The housing 101 may be any shape as long as the inside thereof can accommodate the battery cells. As an example, in one embodiment, as shown in fig. 1, the housing 101 may be, for example, substantially hexahedral in shape. The top plate 102 of the housing 101 is an electrical conductor, i.e., the top plate 102 is made of an electrically conductive material such as metal. In some embodiments, some or all of the other plates of the housing 101 may also be electrical conductors.
In one embodiment, the first pole 104 and the second pole 106 may be disposed on an outer surface of the top plate 102. In the case of normal operation of the cell, the first pole 104 and the second pole 106 are electrically insulated from the top plate 102, i.e., not electrically connected to the top plate 102.
The cell may have a first tab and a second tab (not shown), the first tab may be electrically connected with the first pole 104, and the second tab may be electrically connected with the second pole 106. The first tab and the second tab may be connected to the pole by a connection member such as a tab, or may be directly connected to the pole. Through holes (not shown) may be formed in the top plate 102 to facilitate these connections. The first tab and the second tab are electrically connected with the battery cell to release the current of the battery cell to the outside or to receive the charging current from the outside.
In one embodiment, the battery cell 1 may include at least one thermistor 103 whose resistance value decreases with an increase in temperature, the at least one thermistor 103 being disposed in contact with both of: at least one of the first pole 104 and the second pole 106; and a top plate 102. In the case where the temperature of the at least one thermistor 103 reaches or exceeds a temperature threshold, the at least one pole is electrically connected to each other via the at least one thermistor 103 and the top plate 102.
The material and type of the thermistor 103 are not limited at all. For example, in one embodiment, the thermistor 103 may be formed of a material such as a semiconductor ceramic made of an oxide of two or more metals of manganese, copper, silicon, cobalt, iron, nickel, zinc, and the like. In addition, the thermistor 103 may be formed of a non-oxide such as silicon carbide, tin selenide, tantalum nitride, or the like.
The temperature threshold herein is not limited to a particular certain temperature value, but may be a temperature value that is adjusted with specific usage conditions of the battery and the power consumption device (e.g., voltage of the battery, load size, resistance size of each element in the circuit), ambient environmental parameters (e.g., ambient temperature, humidity), etc. In some embodiments, the temperature threshold may correspond to a temperature that the top plate 102 of the housing 101 will reach when thermal runaway of the cells occurs, for example, about 300 degrees celsius. In practicing the disclosed aspects, one skilled in the art can adjust the threshold temperature according to the particular implementation and select the type and/or material of the thermistor that is compatible with the desired threshold temperature to achieve the desired thermal runaway countermeasure.
Since the present disclosure employs the above-described at least one thermistor 103, in the event of thermal runaway of the battery cells, the temperature of the top plate 102 of the housing 101 will rise to or exceed the threshold temperature such that the resistance value of the thermistor 103 decreases with an increase in temperature to be small enough such that the at least one post in contact with the at least one thermistor 103 is electrically connected to each other via the at least one thermistor 103 and the top plate 102. Since the electrical connection of the pole to the top plate 102 is achieved at this time and the pole is electrically connected to the pole of one or more of the cells of the entire battery that are not subject to thermal runaway, at least a portion of the discharge current of the cells that are not subject to thermal runaway will continue to supply power to the load via the top plate 102 of the cell of the battery cell 1 (i.e., the cell that is subject to thermal runaway), so that the entire battery can continue to supply power to the load.
The electrical connection between the post and the top plate 102, which is described above and is achieved in the event of thermal runaway of the cell, differs from the conventional electrical connection achieved by metal contact, but is achieved by the thermistor 103 when its resistance value is reduced sufficiently small. The particular resistance value required by the thermistor 103 to achieve such electrical connection is not limited and may be varied or adjusted with particular circuit conditions, load conditions, environmental conditions, and the like.
In one embodiment, as shown in fig. 1, the battery cell 1 includes only one thermistor 103, the thermistor 103 being in contact with, for example, a first pole 104, and, for example, a second pole 106 being insulated from the top plate 102 via a first insulator 105. In this embodiment, in the case where thermal runaway occurs in the cells of the battery cell 1, and thus the temperature of the thermistor 103 reaches or exceeds the temperature threshold, the second pole 106 may be electrically connected to each other with the top plate 102 via the cells (e.g., via the active material within the cells).
In one embodiment, the battery cell may be electrically connected to the top plate 102 in the event that the temperature of the battery cell meets or exceeds a temperature threshold. Since the cell is electrically connected to the top plate 102, the second pole 106 can be electrically connected to each other via the cell and the top plate 102.
In one embodiment, an isolation element (not shown) may be provided between the cells of the battery cell 1 and the top plate 102, which isolates the cells and the top plate 102 from each other. For example, the isolation element may be formed of a material such as a nonconductive plastic film, a resin, a foam, or a thermistor whose resistance value decreases with an increase in temperature, or a semiconductor element whose conductive property changes with temperature.
Due to the provision of the isolation element, the cells may be insulated from the top plate 102 in the case of normal operation of the cells.
In one embodiment, at least a portion of the isolation element may be melted (e.g., where the isolation element is formed of a non-conductive plastic film, resin, foam, or the like) or turned on (e.g., where the isolation element is formed of a thermistor or semiconductor element) in the event that the temperature of the cell meets or exceeds a temperature threshold, such that the cell is electrically connected to the top plate 102. In this embodiment, in the case where thermal runaway occurs in the cells of the battery cell 1 so that the temperature of the cells reaches or exceeds the temperature threshold, the second pole 106 may be electrically connected to each other via the cells and the top plate 102. Thus, in case the temperature of both the thermistor 103 and the cell is sufficiently high, both the first pole 104 and the second pole 106 can be electrically connected to the top plate 102, so that at least a portion of the discharge current of the other cell of the battery, which is not subject to thermal runaway, will continue to supply power to the load via the top plate 102 of the cell of the battery cell 1 (i.e. the cell subject to thermal runaway), whereby the whole battery can continue to supply power to the load.
The first pole 104 may be a positive pole or a negative pole, and the second pole 106 may be a negative pole or a positive pole, respectively.
In one embodiment, the first pole 104 is a positive pole and the second pole 106 is a negative pole.
Fig. 2 shows a schematic structural view of a battery cell 1 according to one embodiment of the present disclosure. In this embodiment, the battery cell 1 includes two thermistors 103, i.e., two thermistors 103 in contact with the first pole 104 and the second pole 106, respectively. In one embodiment, in the case where the temperatures of the two thermistors 103 reach or exceed a temperature threshold, the first and second posts 104, 106 are electrically connected to each other with the top plate 102 via a corresponding one of the two thermistors 103, respectively.
In this embodiment, no insulation may be provided between the second pole 106 and the top plate 102. Since the present embodiment employs the above two thermistors 103, in the event of thermal runaway of the battery cells, the temperature of the top plate 102 of the case 101 will rise to or exceed the threshold temperature, so that the resistance value of the thermistor 103 decreases with the rise in temperature to be small enough so that the first and second poles 104 and 106 in contact with the two thermistors 103 are electrically connected to each other via the thermistors 103 and the top plate 102, respectively. Since the electrical connection of the first and second poles 104, 106 to the top plate 102 is achieved at this time, and the first and second poles 104, 106 are electrically connected to the respective poles of one or more of the cells of the entire battery that are not subject to thermal runaway, at least a portion of the discharge current of the cells that are not subject to thermal runaway will continue to power the load via the top plate 102 of the cell 1 (i.e., the cell that is subject to thermal runaway), so that the entire battery can continue to power the load.
In the embodiment shown in fig. 1 or 2, for example, one or two thermistors 103 may be sandwiched between a first pole 104 and/or a second pole 106 and a top plate 102.
However, the thermistor 103 may not be sandwiched between the first pole 104 and/or the second pole 106 and the top plate 102. For example, as shown in fig. 3, a portion of the thermistor 103 may be in contact with the pole, and another portion may be in contact with the top plate 102.
Specifically, fig. 3 shows a schematic structural view of the battery cell 1 according to one embodiment of the present disclosure. As shown in fig. 3, a first insulator 105 may be disposed between the second pole 106 and the top plate 102 such that the second pole 106 is insulated from the top plate 102 via the first insulator 105. Further, a second insulator 107 may be provided between the first pole 104 and the top plate 102 such that the first pole 104 is insulated from the top plate 102 via the second insulator 107. Further, the thermistor 103 may be disposed such that a portion of the thermistor 103 contacts the first pole 104 and another portion of the thermistor 103 contacts the top plate 102.
In this embodiment, a portion of the thermistor 103 contacts the first pole 104 at a side of the first pole 104. However, the present disclosure is not limited thereto, and for example, a portion of the thermistor 103 may contact the first pole 104 at the bottom surface or the top surface of the first pole 104, as long as a portion thereof contacts the first pole 104 and another portion contacts the top plate 104. Thus, the electrical connection of the first pole 104 and the top plate 102 can be achieved even when the temperature of the thermistor 103 reaches or exceeds the temperature threshold without being sandwiched between the first pole 104 and/or the second pole 106 and the top plate 102.
In this embodiment, an isolation element (not shown) may be provided between the cells of the battery cell 1 and the top plate 102, which isolates the cells and the top plate 102 from each other. Due to the provision of the isolation element, the cells may be insulated from the top plate 102 in the case of normal operation of the cells. Further, in the event that the temperature of the battery cell meets or exceeds a temperature threshold, at least a portion of the isolation element may be melted or conducted such that the battery cell is electrically connected to the top plate 102. At this time, the second pole 106 may be electrically connected to the top plate 102 via the battery cell.
Fig. 4 shows a schematic structural view of a battery cell 1 according to one embodiment of the present disclosure. In this embodiment, two thermistors, i.e., a first thermistor 108 and a second thermistor 109, are provided. The first pole 104 is insulated from the top plate 102 via a second insulator 107, and the second pole 106 is insulated from the top plate 102 via a first insulator 105. A portion of the first thermistor 108 contacts the first pole 104 and another portion of the first thermistor 108 contacts the top plate 102. A portion of the second thermistor 109 contacts the second post 106 and another portion of the second thermistor 109 contacts the top plate 102.
Thus, electrical connection of the first and second posts 104, 106 to the top plate 102 may be achieved without being sandwiched between the first and/or second posts 104, 106 and the top plate 102, also in the event that the temperatures of the first and second thermistors 108, 109 meet or exceed a temperature threshold.
In the above, two thermistors are provided in contact with the first pole 104 and the second pole 106, respectively. However, only one thermistor may be provided, with a first portion of the thermistor contacting the first pole 104, a second portion contacting the second pole 106, and a third portion contacting the top plate 102. In this way, the same technical effects as those of the above-described embodiment can also be achieved.
In another embodiment, instead of providing a thermistor, a lock-on structure may also be provided in order to achieve connection of the post to the top plate in the event of thermal runaway of the cell. Alternatively, in yet another embodiment, the following pair lock structure and thermistor may be provided at the same time.
Fig. 5 shows a schematic structural view of a battery cell 1 according to one embodiment of the present disclosure. As shown in fig. 5, the battery cell 1 includes a case 101, a first pole 104, and a second pole 106. The interior of the housing 101 may house a battery cell (not shown), which is a component capable of discharging and charging.
The housing 101 may be any shape as long as the inside thereof can accommodate the battery cells. As an example, in one embodiment, as shown in fig. 5, the housing 101 may be, for example, substantially hexahedral in shape. The top plate 102 of the housing 101 is an electrical conductor, i.e., the top plate 102 is made of an electrically conductive material such as metal. In some embodiments, some or all of the other plates of the housing 101 may also be electrical conductors.
In one embodiment, the first pole 104 and the second pole 106 may be disposed on an outer surface of the top plate 102. The first pole 104 is insulated from the top plate 102 by a first insulator 105 provided on the top plate 102, and the second pole 106 is insulated from the top plate 102 by a second insulator 107 provided on the top plate 102.
The cell may have a first tab and a second tab (not shown), the first tab may be electrically connected with the first pole 104, and the second tab may be electrically connected with the second pole 106. The first tab and the second tab may be connected to the pole by a connection member such as a tab, or may be directly connected to the pole. Through holes (not shown) may be formed in the top plate 102 to facilitate these connections. The first tab and the second tab are electrically connected with the battery cell to release the current of the battery cell to the outside or to receive the charging current from the outside.
As shown in fig. 5, the battery cell 1 may further include at least one electrical connection assembly disposed on the exterior of the top plate 102, the at least one electrical connection assembly configured to electrically connect at least one of the first and second poles 104, 106 with the top plate 102 in response to the top plate 102 being displaced outwardly in response to the internal air pressure of the housing 101 reaching or exceeding a pressure threshold.
Under normal operation of the cell, the internal air pressure of the housing 101 is below the pressure threshold, at which time the electrical connection assembly remains disengaged, so that both the first pole 104 and the second pole 106 are electrically separated from the top plate 102. In the event of thermal runaway of the cells, the internal air pressure of the housing 101 will rise. Since at least one electrical connection assembly is provided, in case the internal air pressure of the housing 101 rises to the pressure threshold, the electrical connection assembly will become a locked or contacted state with each other, so that at least one pole (e.g., the first pole 104) becomes an electrically connected state with the top plate 102. Since at least one pole is electrically connected to the top plate 102 at this point and to the corresponding pole of one or more of the cells of the entire battery that are not subject to thermal runaway, at least a portion of the discharge current of the cells that are not subject to thermal runaway will continue to power the load via the top plate 102 of the cell 1 (i.e., the cell that is subject to thermal runaway), so that the entire battery can continue to power the load.
In one embodiment, as shown in fig. 5, the battery cell 1 includes only one electrical connection assembly that is in contact with, for example, the first pole 104. In this embodiment, in the case where thermal runaway occurs in the cells of the battery cell 1 so that the internal air pressure of the case 101 reaches or exceeds the pressure threshold value, the second pole 106 may be electrically connected to each other via the cells and the top plate 102.
In one embodiment, since the internal air pressure of the case 101 is increased due to thermal runaway of the battery cells, the temperature of the battery cells is increased in synchronization with the increase of the internal air pressure of the case 101. Thus, in the case where the internal air pressure of the case 101 reaches or exceeds the pressure threshold, the temperature of the battery cell also reaches or exceeds a certain temperature threshold. Thus, the cell can be configured to be electrically connected to the top plate 102 at this time. Since the cell is electrically connected to the top plate 102, the second pole 106 can be electrically connected to each other via the cell and the top plate 102.
In one embodiment, an isolation element (not shown) may be provided between the cells of the battery cell 1 and the top plate 102, which isolates the cells and the top plate 102 from each other. For example, the isolation element may be formed of a material such as a nonconductive plastic film, a resin, a foam, or a thermistor whose resistance value decreases with an increase in temperature, or a semiconductor element whose conductive property changes with temperature.
Due to the provision of the isolation element, the cells may be insulated from the top plate 102 in the case of normal operation of the cells.
In one embodiment, in the event that the internal air pressure of the housing 101 meets or exceeds a pressure threshold, the temperature of the battery cell also meets or exceeds a temperature threshold. At this time, at least a portion of the isolation element may be melted (e.g., in the case where the isolation element is formed of a material such as a non-conductive plastic film, resin, foam, or the like) or turned on (e.g., in the case where the isolation element is formed of a thermistor or a semiconductor element), so that the cell is electrically connected with the top plate 102 (e.g., via an active substance inside the cell). In this case, the second posts 106 may be electrically connected to each other via the cells and the top plate 102. Thus, in case the internal air pressure of the housing 101 reaches or exceeds the pressure threshold, both the first pole 104 and the second pole 106 may be electrically connected to the top plate 102, so that at least a portion of the discharge current of the other cells of the battery, which do not undergo thermal runaway, will continue to supply power to the load via the top plate 102 of the cell of the battery cell 1 (i.e. the cell, which undergoes thermal runaway), so that the whole battery can continue to supply power to the load.
The first pole 104 may be a positive pole or a negative pole, and the second pole 106 may be a negative pole or a positive pole, respectively.
In one embodiment, the first pole 104 is a positive pole and the second pole 106 is a negative pole.
In the above embodiments, the electrical connection assembly may take any form, shape or configuration. For example, as shown in fig. 5, the electrical connection assembly may employ a hook-to-lock configuration. However, this is merely an example, and the electrical connection assembly may employ any electrical contact means such as a snap-fit structure, a direct contact structure, a spring or a leaf spring abutment structure. For example, one of the electrical connection components may be in the form of a spring or leaf spring that resiliently presses against the other component as the relative distance from the other component becomes smaller. Obviously, the specific implementation of the electrical connection assembly is not limited in any way, as long as at least one of the first and second poles 104, 106 is electrically connected with the top plate 102 in response to the top plate 102 being displaced outwardly in the event that the internal air pressure of the housing 101 reaches or exceeds a pressure threshold.
In one embodiment, the at least one electrical connection assembly includes a first component 110 and a second component 111 that are electrically separated from each other, the first component 110 being engaged and electrically connected with the at least one pole (e.g., first pole 104), and the second component 111 being engaged and electrically connected with an outer surface of the top plate 102.
In one embodiment, the stiffness of the top plate 102 at a first location near the at least one pole (e.g., the first pole 104) (i.e., the location of the top plate 102 in contact with the first insulator 105 below the first pole 104) is greater than the stiffness of the top plate 102 at a second location where the second component 111 engages the top plate 102. Since the top plate 102 has a stiffness at the first position that is greater than the stiffness at the second position, upon an increase in the internal air pressure of the housing 102, the displacement of the second part 111 outwardly (i.e., upwardly in fig. 5) will be greater than the displacement of the first part 110 outwardly, thereby enabling electrical contact of the second part 111 with the first part 110.
In one embodiment, the stiffness of the top plate 102 at the first location may be made greater than the stiffness at the second location by making the top plate 102 different in material, thickness, or machining process at the first location and the second location. In one embodiment, the top plate 102 has a stiffness at the first location that is greater than a stiffness at the second location due to the first pole 104 being disposed at the first location (e.g., by a staking process, etc.).
In one embodiment, the thickness of the top plate 102 at the first location is greater than the thickness of the top plate 102 at the second location. Thereby, the top plate 102 is made stiffer at the first location than at the second location.
In one embodiment, two electrical connection assemblies may be provided. As shown in fig. 6, the battery cell 1 includes two electrical connection assemblies configured to electrically connect the first and second poles 104 and 106 with the top plate 102, respectively, in the event that the internal air pressure of the housing 101 meets or exceeds a pressure threshold.
There is also provided, in accordance with some embodiments of the present disclosure, a battery including a battery cell as described in any one of the above aspects.
There is also provided, in accordance with some embodiments of the present disclosure, an electrical device including a battery as described in any one of the above aspects, and the battery is configured to provide electrical energy to the electrical device.
The powered device may be any device or system that uses or mounts a battery.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (9)
1. A battery cell, comprising:
a housing, an interior of the housing containing a battery cell, and a top plate of the housing being an electrical conductor;
a first pole electrically connected to the first tab, the first pole being disposed on an outer surface of the top plate, the first pole being insulated from the top plate by a first insulating member disposed on the top plate, and the first tab being electrically connected to the battery cell;
A second pole electrically connected to a second tab, the second pole being disposed on an outer surface of the top plate, the second pole being insulated from the top plate by a second insulating member disposed on the top plate, the second tab being electrically connected to the electrical core;
an isolation element located between the cell and the top plate and insulating the cell and the top plate from each other; and
At least one electrical connection assembly disposed on an exterior of the top plate, the at least one electrical connection assembly configured to electrically connect at least one of the first and second poles with the top plate in response to the top plate being displaced outwardly if an internal air pressure of the housing meets or exceeds a pressure threshold.
2. The battery cell of claim 1, wherein the at least one electrical connection assembly comprises a first component and a second component that are electrically separated from each other, the first component being engaged with and electrically connected to the at least one post and the second component being engaged with and electrically connected to an outer surface of the top plate.
3. The battery cell of claim 2, wherein the top plate has a stiffness at a first location near the at least one pole that is greater than a stiffness of the top plate at a second location where a second component is engaged with the top plate.
4. The battery cell of claim 2, wherein a thickness of the top plate at a first location is greater than a thickness of the top plate at a second location.
5. The battery cell of claim 2, wherein the at least one electrical connection assembly comprises two electrical connection assemblies configured to electrically connect the first and second poles with the top plate, respectively, if an internal gas pressure of the housing meets or exceeds the pressure threshold.
6. The battery cell of claim 2, wherein the at least one electrical connection assembly comprises only one electrical connection assembly, and
The electrical connection assembly is configured to electrically connect one of the first and second poles with the top plate and the other of the first and second poles with each other via the electrical core if the internal gas pressure of the housing meets or exceeds the pressure threshold, wherein at least a portion of the isolation element is melted or conducted such that the electrical core is electrically connected with the top plate if the internal gas pressure of the housing meets or exceeds the pressure threshold.
7. The battery cell of claim 6, wherein the one post is a positive post.
8. A battery comprising the battery cell according to any one of claims 1 to 7.
9. An electrical device comprising a battery according to claim 11 for providing electrical energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410426280.6A CN118017168A (en) | 2024-04-10 | 2024-04-10 | Battery monomer, battery and power consumption device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410426280.6A CN118017168A (en) | 2024-04-10 | 2024-04-10 | Battery monomer, battery and power consumption device |
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| CN118017168A true CN118017168A (en) | 2024-05-10 |
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| CN202410426280.6A Pending CN118017168A (en) | 2024-04-10 | 2024-04-10 | Battery monomer, battery and power consumption device |
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