Battery, battery pack, electric device and battery module

Abstract

A battery (100), a battery pack, an electric device and a battery module, which belong to the technical field of batteries. The battery (100) comprises a wrapping structure (1), a conductive terminal (2), and battery cells (3), wherein an accommodating space (11) is formed in the wrapping structure (1); a pressure relief port (12) in communication with the accommodating space (11) is formed in one side of the wrapping structure (1); and the remaining part of the wrapping structure (1) is of a sealed structure. The conductive terminal (2) is connected to the wrapping structure (1), and the conductive terminal (2) and the pressure relief port (12) are located on different sides of the wrapping structure (1). The battery cells (3) are located in the accommodating space (11), and tabs (31) of the battery cells (3) are electrically connected to the conductive terminal (2). By means of the wrapping structure (1), a thermal runaway gas in the accommodating space (11) is guided to be ejected through the pressure relief port (12), thereby achieving the directional ejection of the thermal runaway gas in the accommodating space (11) of the battery (100). The conductive terminal (2) and the pressure relief port (12) are located on different sides of the wrapping structure (1), such that the thermal runaway gas ejected through the pressure relief port (12) can be directed as far away as possible from the conductive terminal (2).

Description

Battery, battery pack, power-consuming device and battery module

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on Chinese patent application number 202410254427.8, application date March 6, 2024, and invention name “A battery, a battery pack, an electrical device and a battery module”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into the present disclosure as a reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a battery, a battery pack, an electrical device, and a battery module. Background Art

[0004] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0005] In the related art, when a battery experiences thermal runaway, the gas of the battery due to the thermal runaway will be ejected in all directions, and the ejection direction of the gas of the battery due to the thermal runaway will be uncertain.

[0006] Summary of the Invention

[0007] To solve the above technical problems, the present disclosure provides a battery, a battery pack, an electrical device and a battery module, so that the gas ejected when the battery experiences thermal runaway can be ejected along a preset direction.

[0008] The present disclosure is achieved through the following technical solutions.

[0009] A first aspect of an embodiment of the present disclosure provides a battery, comprising:

[0010] A wrapping structure forms a receiving space, a pressure relief port connected to the receiving space is formed on one side of the wrapping structure, and the rest of the wrapping structure is a sealing structure;

[0011] a conductive terminal connected to the package structure, wherein the conductive terminal and the pressure relief port are located on different sides of the package structure;

[0012] A battery cell is located in the accommodation space, and a tab of the battery cell is electrically connected to the conductive terminal.

[0013] In the disclosed embodiment, the wrapping structure guides the thermal runaway gases within the containment space toward the pressure relief vent. Because the conductive terminals and the pressure relief vent are located on different sides of the wrapping structure, the thermal runaway gases and any material they carry can be kept as far away from the conductive terminals as possible.

[0014] In one embodiment, the number of the battery cells is at least two, and the conductive terminal includes a sampling electrode and at least two transfer electrodes, wherein one transfer electrode is electrically connected to the tab of one of the battery cells, and the other transfer electrode is electrically connected to the tab of the other battery cell, and the polarities of the tabs corresponding to the two transfer electrodes are opposite, and the sampling electrodes are respectively electrically connected to the tabs of the corresponding two battery cells, and the polarities of the tabs of the corresponding two battery cells electrically connected to the sampling electrodes are opposite.

[0015] In the disclosed embodiments, the battery cells in the battery are powered or charged via at least two adapter electrodes, and the battery cells are connected in series via sampling electrodes. By measuring the voltage between the sampling electrodes and the corresponding adapter electrodes, the operating status of the corresponding battery cells can be monitored. The adapter electrodes for inputting and outputting electrical energy, as well as the sampling electrodes used for monitoring, are located on different sides of the package structure from the pressure relief port.

[0016] In one embodiment, the conductive terminal and the pressure relief port are located on opposite sides of the packaging structure.

[0017] In the embodiment of the present disclosure, the conductive terminal and the pressure relief port are located on opposite sides of the wrapping structure, and the conductive terminal can be away from the pressure relief port.

[0018] In one embodiment, the battery further includes a flame-retardant cover covering the pressure relief port, and the pressure-bearing capacity of the wrapping structure is greater than the pressure-bearing capacity of the flame-retardant cover.

[0019] In the embodiment of the present disclosure, the flame-retardant cover is used to shield the battery cells in the accommodation space of the packaging structure, thereby reducing the impact of thermal runaway of adjacent batteries on the battery cells.

[0020] In one embodiment, the flame retardant cover is made of mica.

[0021] In the embodiment of the present disclosure, the mica material can prevent the flame retardant cover from being ignited as much as possible in the event of thermal runaway.

[0022] In one embodiment, notches are formed on the flame retardant cover.

[0023] In the disclosed embodiment, reducing the pressure bearing capacity of the flame retardant cover is beneficial to the pressure relief of thermal runaway gas.

[0024] In one embodiment, the flame-retardant cover is formed with a through hole connected to the storage space, and the battery also includes a temperature-regulating container partially located in the storage space, and the battery cell is arranged on one side or two opposite sides of the temperature-regulating container. The temperature-regulating container has a temperature-regulating cavity and an inlet and an outlet respectively connected to the temperature-regulating cavity. The temperature-regulating container is passed through the through hole so that the inlet and the outlet are exposed outside the storage space along the wrapping structure toward one side of the flame-retardant cover.

[0025] In the disclosed embodiment, the temperature regulating container extends from the through hole, so that the inlet and outlet of the temperature regulating container are exposed, making it easier for the temperature regulating container to be connected to an external fluid.

[0026] In one embodiment, the ignition point of the flame retardant cover and the ignition point of the wrapping structure are both greater than or equal to 800°C.

[0027] In the disclosed embodiment, the ignition point is relatively high, and the flame-retardant cover and the wrapping structure are not easily ignited.

[0028] In one embodiment, the packaging structure includes:

[0029] a housing, wherein the pressure relief port is formed on one side of the housing;

[0030] The top cover and the shell are configured to form a receiving space, and the conductive terminal is installed on the top cover.

[0031] In the disclosed embodiment, before the battery cell is inserted into the shell, the tabs of the battery cell can be connected to the conductive terminals of the top cover more conveniently.

[0032] In one embodiment, the top cover has a flange covering the side wall of the shell, and a gap between the flange and the side wall of the shell is less than or equal to 0.5 mm.

[0033] In the embodiment of the present disclosure, in the case of incomplete sealing, the resistance to the thermal runaway gas ejected from between the flange and the side wall of the shell is increased, and the thermal runaway gas is guided to eject from the pressure relief port.

[0034] In one embodiment, the shell includes a plurality of bent plates that are bent in sequence, and the bent plates at both ends of the circumference of the battery cell are connected. The plurality of bent plates are arranged to form the pressure relief port. The top cover and the pressure relief port are respectively located on opposite sides of the shell. The top cover and the plurality of bent plates are arranged to form the accommodating space. The wrapping structure also includes an insulating layer, and the insulating layer covers the inner surface of the shell.

[0035] In the embodiment of the present disclosure, the insulating layer can be installed on the shell when the shell is in the unfolded state, which makes the installation of the insulating layer more convenient.

[0036] In one embodiment, the shell is made of metal, and the battery further includes a reinforcing plate, which is located on the inner surface of the shell. The bent plates at both ends of the circumference of the battery cell are connected by welding, and the welding positions of the bent plates at both ends of the circumference of the battery cell are target positions, and the reinforcing plate is welded to the shell at the target position.

[0037] In the disclosed embodiment, the support of the reinforcing plate is used to prevent the bent plates at both ends from being welded through.

[0038] In one embodiment, the shell is made of metal, and the thickness of the shell is 0.1 mm to 1 mm.

[0039] In the embodiment of the present disclosure, the thickness of the metal shell is relatively appropriate, and the weight of the shell is reduced as much as possible while having sufficient pressure-bearing capacity.

[0040] In one embodiment, the shell is made of plastic, is an integrally formed structure, and has a thickness of 1 mm to 3 mm.

[0041] In the embodiment of the present disclosure, the thickness of the plastic shell is relatively appropriate, and the weight of the shell is reduced as much as possible while having sufficient pressure-bearing capacity.

[0042] In one embodiment, the top cover is made of plastic, and the shell is made of metal or plastic.

[0043] In one embodiment, the battery cell is a soft-pack battery cell.

[0044] A second aspect of the present disclosure provides a battery pack, including:

[0045] Box;

[0046] Any of the above batteries is located in the box.

[0047] In one embodiment, the number of batteries in the box is at least two, and the at least two batteries are arranged in sequence. The conductive terminals of the at least two batteries arranged in sequence are oriented in the same direction, and the orientation of the conductive terminals of the at least two batteries arranged in sequence is cross-arranged with the direction in which the at least two batteries are arranged in sequence.

[0048] In the disclosed embodiment, in at least two batteries arranged sequentially, the pressure relief vent of each battery can avoid the conductive terminals of each battery as much as possible, and the thermal runaway gas ejected from the pressure relief vent of each battery can avoid the conductive terminals of the corresponding adjacent battery as much as possible, thereby reducing the possibility of the thermal runaway gas short-circuiting the conductive terminals of the adjacent battery, thereby reducing the possibility of thermal runaway spreading to the adjacent battery.

[0049] A third aspect of the present disclosure provides an electrical device, including:

[0050] Device body;

[0051] Any of the above-mentioned battery packs is installed in the device body to supply power to the device body.

[0052] A fourth aspect of an embodiment of the present disclosure provides a battery module, comprising at least two batteries of any one of the above-mentioned types, wherein at least two of the batteries are arranged in sequence, the conductive terminals of the at least two batteries arranged in sequence are oriented in the same direction, and in the at least two batteries arranged in sequence, the orientation of the conductive terminals is arranged crosswise to the direction in which the at least two batteries are arranged in sequence.

[0053] In the disclosed embodiment, in at least two batteries arranged sequentially, the pressure relief vent of each battery can avoid the conductive terminals of each battery as much as possible, and the thermal runaway gas ejected from the pressure relief vent of each battery can avoid the conductive terminals of the corresponding adjacent battery as much as possible, thereby reducing the possibility of the thermal runaway gas short-circuiting the conductive terminals of the adjacent battery, thereby reducing the possibility of thermal runaway spreading to the adjacent battery.

[0054] Effects of the invention:

[0055] In the battery of the disclosed embodiments, if thermal runaway occurs in a battery cell within the battery's packaging structure, due to the pressure relief vent formed on one side of the packaging structure and connected to the storage space, the generated thermal runaway gas faces significant resistance to escape from other parts of the packaging structure except the pressure relief vent, making it difficult for the thermal runaway gas to escape from the packaging structure other than the pressure relief vent. The packaging structure guides the thermal runaway gas to eject from the packaging structure through the pressure relief vent, thereby relieving the pressure in the storage space within the packaging structure and achieving a directional eruption of the thermal runaway gas. Because the conductive terminal and the pressure relief vent are located on different sides of the packaging structure, the thermal runaway gas ejected from the pressure relief vent and any substances carried by the thermal runaway gas can be kept as far away from the conductive terminal as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0057] FIG1 is a schematic structural diagram of a battery according to an embodiment of the present disclosure, showing an inlet and an outlet of a temperature regulating container extending out of a receiving space;

[0058] FIG2 is a schematic structural diagram of a battery according to an embodiment of the present disclosure, showing conductive terminals;

[0059] FIG3 is an exploded view of a battery according to an embodiment of the present disclosure;

[0060] FIG4 is an assembly diagram of a housing and an insulating layer according to an embodiment of the present disclosure;

[0061] FIG5 is a schematic diagram of position AA in FIG4 ;

[0062] FIG6 is an enlarged view of position B in FIG5;

[0063] FIG7 is a layout diagram of a temperature regulating container and a battery cell according to an embodiment of the present disclosure;

[0064] FIG8 is a schematic structural diagram of a temperature regulating container according to an embodiment of the present disclosure;

[0065] FIG9 is an assembly diagram of the top cover and the housing according to an embodiment of the present disclosure;

[0066] FIG10 is a layout diagram of at least two batteries arranged in sequence according to an embodiment of the present disclosure.

[0067] Description of Reference Numerals

[0068] 1. Wrapping structure; 11. Accommodation space; 12. Pressure relief vent; 13. Shell; 131. Bending plate; 14. Top cover; 141. Flanged edge; 15. Insulation layer; 2. Conductive terminal; 21. Transfer electrode; 22. Sampling electrode; 3. Battery cell; 31. Tab; 4. Flame-retardant cover; 41. Notch; 42. Through hole; 5. Temperature control container; 51. Temperature control chamber; 52. Inlet; 53. Outlet; 54. Container body; 55. First guide plate; 56. Second guide plate; 6. Reinforcement plate; 100. Battery. DETAILED DESCRIPTION

[0069] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this disclosure; the terms "including" and "having" of the embodiments of this disclosure and any variations thereof are intended to cover non-exclusive inclusions.

[0071] In the description of the embodiments of the present disclosure, technical terms such as "first," "second," and "third" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0072] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0074] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0075] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0076] In the related art, when a battery experiences thermal runaway, the thermal runaway gas of the battery will erupt in all directions with an uncertain eruption direction. The battery does not have a structure to guide the thermal runaway gas to erupt in a preset direction.

[0077] In the embodiment of the present disclosure, a pressure relief vent is provided on the wrapping structure, and the thermal runaway gas of the battery cell in the accommodation space is guided by the wrapping structure to be ejected from the pressure relief vent in a preset direction. This preset direction is the direction of the wrapping structure toward the pressure relief vent, so that the ejection direction of the thermal runaway gas of the battery can be set according to actual needs.

[0078] The battery provided in the embodiments of the present disclosure can be used, but is not limited to, in energy storage power supply systems, vehicles, ships, aircraft and other electrical devices.

[0079] The batteries provided in the embodiments of the present disclosure can also be grouped together to form a battery pack. The battery pack can also be used, but is not limited to, in energy storage power systems, vehicles, ships, aircraft, and other electrical devices. The use of a battery pack can provide a higher total energy. Furthermore, the battery pack is formed by placing multiple grouped batteries in a sealed box, thereby providing more reliable dust and water resistance, and can therefore be used in harsher, humid, and even submerged environments.

[0080] There can be multiple battery cells, and these cells can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of both series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid configuration to form a battery pack. Of course, multiple battery cells can first be connected in series, in parallel, or in a hybrid configuration to form a battery module, which can then be connected in series, in parallel, or in a hybrid configuration to form a battery pack. A battery pack may also include other structures, such as a busbar assembly for electrically connecting multiple battery cells.

[0081] A battery cell is a unit that can convert chemical energy into electrical energy.

[0082] In the embodiment of the present disclosure, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0083] In the embodiments of the present disclosure, the battery cells may be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., but the embodiments of the present disclosure are not limited to this.

[0084] The embodiments of the present disclosure provide an electrical device including the above-mentioned battery or battery pack for providing electrical energy. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0085] The electric device of the embodiment of the present disclosure includes a device body and a battery pack, and the battery pack is installed in the device body to supply power to the device body.

[0086] In the embodiment of the present disclosure, power is supplied to the device body through the battery pack, so that the device body obtains the electrical energy required to maintain normal operation.

[0087] The battery pack of the embodiment of the present disclosure includes a box body and a battery 100 , wherein the battery 100 is located in the box body.

[0088] In the embodiment of the present disclosure, the battery 100 is located in the box, and the box and the battery 100 in the box supply power to the outside as a whole. The box can better protect the battery 100 in the box.

[0089] Referring to Figures 1 to 3 , the battery 100 of the embodiment of the present disclosure includes a wrapping structure 1, a conductive terminal 2, and a battery cell 3. The wrapping structure 1 forms a housing space 11, and a pressure relief vent 12 connected to the housing space 11 is formed on one side of the wrapping structure 1. The rest of the wrapping structure 1 is a sealed structure. The conductive terminal 2 is connected to the wrapping structure 1, and the conductive terminal 2 and the pressure relief vent 12 are located on different sides of the wrapping structure 1. The battery cell 3 is located in the housing space 11, and the tab 31 of the battery cell 3 is electrically connected to the conductive terminal 2.

[0090] The wrapping structure 1 is a structure wrapped around the battery cell 3 , and the accommodation space 11 of the wrapping structure 1 is mainly used to accommodate the battery cell 3 .

[0091] The conductive terminal 2 is electrically connected to the tab 31 of the battery cell 3 . The battery cell 3 is powered externally through the conductive terminal 2 , or an external power source is powered externally through the conductive terminal 2 .

[0092] For example, the conductive terminal 2 is a tab, and the multiple batteries 100 in the battery pack are connected in series, in parallel, or in mixed series via the tab.

[0093] Exemplarily, the battery cell 3 includes a bare cell and an outer packaging wrapped around the bare cell for protecting the bare cell. The bare cell includes a positive electrode sheet, a negative electrode sheet, and a separator located between the positive electrode sheet and the negative electrode sheet.

[0094] A pressure relief vent 12 connected to the accommodating space 11 is formed on one side of the wrapping structure 1. The rest of the wrapping structure 1 is a sealed structure, meaning that the portion of the wrapping structure 1 covering the battery cell 3, except for the pressure relief vent 12, is substantially sealed. In other words, the portion of the wrapping structure 1 covering the battery cell 3, except for the pressure relief vent 12, can be completely sealed or partially sealed. In the event that the portion of the wrapping structure 1 covering the battery cell 3, except for the pressure relief vent 12, is not completely sealed, as long as the gaps at the incompletely sealed locations of the wrapping structure 1 can, to a certain extent, suppress the eruption of thermal runaway gases from the incompletely sealed locations of the wrapping structure 1, thereby guiding the thermal runaway gases to erupt from the pressure relief vent 12.

[0095] The conductive terminal 2 and the pressure relief vent 12 are located on different sides of the package structure 1 , and the thermal runaway gas ejected from the pressure relief vent 12 can be as far away from the conductive terminal 2 as possible.

[0096] For example, the number of battery cells 3 in the packaging structure 1 may be one or at least two.

[0097] In the disclosed embodiment, if thermal runaway occurs in a battery cell 3 within the packaging structure 1 of the battery 100, due to the formation of a pressure relief vent 12 on one side of the packaging structure 1, which is connected to the accommodation space 11, the generated thermal runaway gas faces significant resistance to escape from the packaging structure 1 other than the pressure relief vent 12. This makes it difficult for the thermal runaway gas to escape from the packaging structure 1 other than the pressure relief vent 12. The packaging structure 1 guides the thermal runaway gas to eject from the packaging structure 1 through the pressure relief vent 12, thereby relieving the pressure in the accommodation space 11 within the packaging structure 1 and achieving a directional eruption of the thermal runaway gas. Because the conductive terminal 2 and the pressure relief vent 12 are located on different sides of the packaging structure 1, the thermal runaway gas ejected from the pressure relief vent 12 and the substances carried by the thermal runaway gas can be kept as far away from the conductive terminal 2 as possible.

[0098] In one embodiment, the battery cell 3 is a soft-pack battery cell.

[0099] The outer packaging of the bare cell of the soft-pack battery cell, which is used to protect the bare cell, is a plastic film.

[0100] Exemplarily, the plastic film is an aluminum-plastic film.

[0101] In the disclosed embodiment, when thermal runaway occurs in the battery cell 3 , the thermal runaway gas generated by the bare cell breaks through the plastic film and sprays in all directions. The thermal runaway gas is ejected directionally from the pressure relief port 12 under the guidance of the wrapping structure 1 .

[0102] It is understandable that the battery cell 3 is not limited to a soft-pack battery cell. For example, the battery cell 3 may be a hard-shell battery cell 3, wherein the bare cell of the hard-shell battery cell 3 is covered with an outer metal shell or plastic shell.

[0103] In one embodiment, referring to FIG. 10 , the number of batteries 100 in the battery pack box is at least two, and the at least two batteries 100 are arranged sequentially. The conductive terminals 2 of the at least two batteries 100 arranged sequentially are oriented in the same direction, and the conductive terminals 2 of the at least two batteries 100 arranged sequentially are oriented crosswise to the direction in which the at least two batteries 100 are arranged sequentially.

[0104] The orientation of the conductive terminal 2 of the battery 100 refers to the direction of the side of the packaging structure 1 of the battery 100 facing the conductive terminal 2 .

[0105] For example, referring to FIG. 10 , in at least two batteries 100 arranged sequentially, the conductive terminals 2 are oriented perpendicular to the direction in which the at least two batteries 100 are arranged sequentially.

[0106] In the embodiment of the present disclosure, since the conductive terminal 2 and the pressure relief vent 12 are located on different sides of the wrapping structure 1, and the conductive terminals 2 of at least two batteries 100 arranged in sequence are oriented in the same direction, the orientation of the conductive terminals 2 in the at least two batteries 100 arranged in sequence is arranged crosswise with the direction in which the at least two batteries 100 are arranged in sequence, so that the pressure relief vents 12 of the at least two batteries 100 arranged in sequence can avoid the conductive terminals 2 of the at least two batteries 100 arranged in sequence, thereby reducing the possibility that the thermal runaway gas ejected from the pressure relief vent 12 of any battery 100 in the at least two batteries 100 arranged in sequence will short-circuit the conductive terminal 2 of the adjacent battery 100, thereby facilitating the thermal runaway of the battery 100 from spreading to the adjacent battery.

[0107] In one embodiment, referring to Figures 2 and 3, the number of battery cells 3 in the battery 100 is at least two, and the conductive terminal 2 includes a sampling electrode 22 and at least two transfer electrodes 21, wherein one transfer electrode 21 is electrically connected to the tab 31 of one battery cell 3, and the other transfer electrode 21 is electrically connected to the tab 31 of the other battery cell 3, and the polarities of the tabs 31 corresponding to the two transfer electrodes 21 are opposite. The sampling electrode 22 is electrically connected to the tabs 31 of the two corresponding battery cells 3, respectively, and the polarities of the tabs 31 of the two corresponding battery cells 3 electrically connected to the sampling electrode 22 are opposite.

[0108] The tabs 31 corresponding to at least two of the adapter electrodes 21 have opposite polarities, with one adapter electrode 21 having a positive polarity and the other having a negative polarity. The battery cells 3 of the battery 100 can be powered externally via the adapter electrodes 21 and can be charged via the adapter electrodes 21.

[0109] The sampling electrodes 22 are electrically connected to the tabs 31 of the two corresponding battery cells 3, respectively. The polarity of the tabs 31 of the two corresponding battery cells 3 electrically connected to the sampling electrodes 22 is opposite. Each sampling electrode 22 is electrically connected to the positive tab 31 of one battery cell 3 and the negative tab 31 of another battery cell 3, respectively. The battery cells 3 of the battery 100 are connected in series through the sampling electrodes 22.

[0110] Exemplarily, referring to FIG. 2 and FIG. 3 , the switching electrode 21 and the sampling electrode 22 are both bars.

[0111] In the disclosed embodiment, the battery cells 3 of the battery 100 are connected in series via the sampling electrode 22, and the battery cells 3 of the battery 100 are powered or charged via the adapter electrode 21. The sampling electrode 22 connects the battery cells 3 of the battery 100 in series, and the potential of the sampling electrode 22 is the potential between the two battery cells 3 connected in series. By measuring and sampling the voltage between the sampling electrode 22 and the corresponding adapter electrode 21, the operating status of the corresponding battery cell 3 can be identified. Because the conductive terminal 2 and the pressure relief vent 12 are located on different sides of the package structure 1, the thermal runaway gas ejected from the pressure relief vent 12 can avoid the adapter electrode 21 and the sampling electrode 22 as much as possible.

[0112] In one embodiment, referring to FIG. 1 to FIG. 3 , the battery 100 further includes a flame-retardant cover 4 covering the pressure relief port 12 , and the pressure bearing capacity of the wrapping structure 1 is greater than that of the flame-retardant cover 4 .

[0113] Pressure bearing capacity refers to the ability to withstand fluid pressure.

[0114] The relative size of the pressure bearing capacity can be measured by filling the package structure 1 with gas. Specifically, because the flame-retardant cover 4 is located over the pressure relief port 12, the package structure 1 and the flame-retardant cover 4 essentially seal the accommodation space 11. When gas is filled into the accommodation space 11, the air pressure in the accommodation space 11 continuously increases, and the gas pressure borne by the package structure 1 and the flame-retardant cover 4 continuously increases. As gas is continuously filled into the accommodation space 11, the flame-retardant cover 4 breaks before the package structure 1, that is, the pressure bearing capacity of the flame-retardant cover 4 is less than that of the package structure 1, and the bearing capacity of the package structure 1 is greater than that of the flame-retardant cover 4.

[0115] The flame-retardant cover 4 has a certain flame-retardant capability. In the event of thermal runaway of the battery 100 , the flame-retardant cover 4 may be deformed due to the high temperature, but will basically not be ignited.

[0116] In the embodiment of the present disclosure, the flame retardant cover 4 is provided on the pressure relief port 12. The flame retardant cover 4 has a certain flame retardant ability, which can reduce, to a certain extent, the possibility of the flame retardant cover 4 being ignited in the event of thermal runaway of the battery 100. The flame retardant cover 4 is provided on the pressure relief port 12. In the event of thermal runaway of the adjacent battery 100, it can reduce the thermal runaway gas generated by the adjacent battery 100 from entering the storage space 11 through the pressure relief port 12, which is beneficial to suppress the spread of thermal runaway to a certain extent. In the event of thermal runaway of the battery cell 3 in the storage space 11, since the bearing capacity of the wrapping structure 1 is greater than the bearing capacity of the flame retardant cover 4, the thermal runaway gas in the storage space 11 first breaks through the flame retardant cover 4, causing the thermal runaway gas in the storage space 11 to erupt directionally from the pressure relief port 12.

[0117] In one embodiment, referring to FIG. 1 to FIG. 3 , the flame retardant cover 4 may be made of mica.

[0118] Exemplarily, the flame retardant cover 4 is mica paper.

[0119] Exemplarily, the mica paper is bonded to the wrapping structure 1 .

[0120] In the embodiment of the present disclosure, the flame retardant cover 4 is made of mica, which has a certain flame retardancy and will not be ignited in the event of thermal runaway of the battery 100. The thinner the flame retardant cover 4 made of mica, the smaller the pressure bearing capacity.

[0121] In one embodiment, referring to FIG. 1 , the flame retardant cover 4 may be formed with notches 41 .

[0122] For example, referring to FIG. 1 , FIG. 3 and FIG. 4 , the notch 41 is located in the area corresponding to the pressure relief port 12 .

[0123] In the embodiment of the present disclosure, by processing the notch 41 on the flame retardant cover 4, the pressure bearing capacity of the flame retardant cover 4 can be reduced. In the event that thermal runaway occurs in the battery cell 3 in the accommodating space 11 of the wrapping structure 1, the thermal runaway gas in the accommodating space 11 is facilitated to break through the flame retardant cover 4 and eject from the pressure relief port 12.

[0124] In one embodiment, referring to FIG. 1 , the flame retardant cover 4 is formed with a through hole 42 communicating with the accommodating space 11 .

[0125] The through hole 42 on the flame retardant cover 4 passes through the flame retardant cover 4 .

[0126] In the embodiment of the present disclosure, part of the structure within the accommodating space 11 of the wrapping structure 1 needs to extend out of the accommodating space 11. This part of the structure extends out of the accommodating space 11 from the through hole 42 of the flame retardant cover 4. The position where the flame retardant cover 4 is provided is the pressure relief port 12 for pressure relief. Even if part of the structure of the accommodating space 11 extends out from the through hole 42, the through hole 42 does not need to be sealed, which is conducive to simplifying the structure of the battery 100.

[0127] In one embodiment, referring to Figures 3, 7 and 8, the battery 100 further includes a temperature-regulating container 5 partially located within the accommodating space 11, and a battery cell 3 is provided on one side or two opposite sides of the temperature-regulating container 5. The temperature-regulating container 5 has a temperature-regulating cavity 51 and an inlet 52 and an outlet 53 respectively connected to the temperature-regulating cavity 51. The temperature-regulating container 5 is penetrated by the through hole 42 so that the inlet 52 and the outlet 53 are both exposed outside the accommodating space 11 along the side of the wrapping structure 1 toward the flame-retardant cover 4.

[0128] The battery cells 3 generate heat during operation, and even in the event of thermal runaway, they generate significant heat. Fluid enters the temperature control chamber 51 of the temperature control container 5 through the inlet 52 and flows out of the temperature control chamber 51 through the outlet 53. The flow of fluid into and out of the temperature control chamber 51 regulates the temperature of the battery cells 3.

[0129] Exemplarily, the fluid flowing through the temperature regulating chamber 51 of the temperature regulating container 5 may be liquid or gas.

[0130] Exemplarily, liquid or gas with a relatively low temperature is introduced into the temperature regulating chamber 51 to cool the battery cells 3 .

[0131] Exemplarily, the temperature control container 5 may be an air bag.

[0132] For example, the material of the airbag may be rubber.

[0133] For example, referring to FIG. 3 and FIG. 7 , battery cells 3 are disposed on opposite sides of the temperature regulating container 5 .

[0134] For example, referring to FIG. 3 , the number of battery cells 3 on each side is two, and the two battery cells 3 on each side are connected in series via the sampling electrode 22 .

[0135] For example, referring to FIG. 7 , the number of battery cells 3 on each side is one.

[0136] Exemplarily, the number of battery cells 3 on each side is one, and the two battery cells 3 located on both sides of the temperature control container 5 are connected in series through the sampling electrode 22 .

[0137] In the disclosed embodiment, the inlet 52 and outlet 53 of the temperature-regulating container 5 extend outside the accommodation space 11 through the through-hole 42 of the flame-retardant cover 4. This facilitates connecting the temperature-regulating container 5 to an external fluid source via the inlet 52 and outlet 53, allowing external fluid to enter the temperature-regulating container 5 through the inlet 52 and exit through the outlet 53, thereby regulating the temperature of the battery cells 3. Since the inlet 52 and outlet 53 of the temperature-regulating container 5 extend outside the accommodation space 11 through the through-hole 42 of the flame-retardant cover 4, the through-hole 42 does not need to be sealed, which helps simplify the structure of the battery 100.

[0138] It is understandable that what extends out of the accommodating space 11 of the wrapping structure 1 from the through hole 42 of the flame retardant cover 4 is not necessarily the temperature regulating container 5 , but may also be other structures partially located in the accommodating space 11 of the wrapping structure 1 depending on the circumstances.

[0139] In one embodiment, referring to FIG8 , the temperature control container 5 includes a container body 54, a first guide plate 55, and a second guide plate 56. The temperature control chamber 51, the inlet 52, and the outlet 53 are all formed in the container body 54. The end of the container body 54 facing the pressure relief port 12 is the target end, and the outlet 53 and the inlet 52 are both located at the target end of the container body 54. The first guide plate 55 is located in the temperature control chamber 51. The first guide plate 55 is connected to the cavity wall of the temperature control chamber 51 facing the target end. The first guide plate 55 is spaced apart from the cavity wall of the temperature control chamber 51 facing away from the target end. There are multiple first guide plates 55, and multiple first guide plates 55 are located between the outlet 53 and the inlet 52. The second guide plate 56 is located in the temperature regulating chamber 51. The second guide plate 56 is spaced apart from the cavity wall of the temperature regulating chamber 51 toward the target end. The second guide plate 56 is connected to the cavity wall of the temperature regulating chamber 51 away from the target end. The second guide plate 56 is located between the first guide plate 55 closest to the outlet 53 and the first guide plate 55 closest to the inlet 52.

[0140] The container body 54 is mainly used to accommodate a fluid whose temperature can be adjusted.

[0141] The first guide plate 55 and the second guide plate 56 are used to guide the fluid to flow in the temperature adjustment chamber 51 .

[0142] In the embodiment of the present disclosure, since the first guide plate 55 is connected to the cavity wall of the cooling cavity toward the target end, the first guide plate 55 is spaced apart from the cavity wall of the cooling cavity away from the target end, and the second guide plate 56 is spaced apart from the cavity wall of the cooling cavity toward the target end, the second guide plate 56 is connected to the cavity wall of the cooling cavity away from the target end, and the second guide plate 56 is located between the first guide plate 55 closest to the outlet 53 and the first guide plate 55 closest to the inlet 52, so that the first guide plate 55 and the second guide plate 56 are distributed in a staggered state in the accommodating space 11. The fluid entering the temperature control cavity 51 from the inlet 52 flows through a longer path under the guidance of the first guide plate 55 and the second guide plate 56 and then flows out from the outlet 53, which is conducive to sufficient temperature control of the fluid in the temperature control cavity 51.

[0143] It is understandable that the first guide plate 55 and the second guide plate 56 may not be provided in the temperature adjustment chamber 51 depending on the situation.

[0144] In one embodiment, the ignition point of the flame retardant cover 4 and the ignition point of the wrapping structure 1 are both greater than or equal to 800°C.

[0145] For example, the ignition point of the flame retardant cover 4 may be 800° C., 810° C., 860° C., or 900° C., etc.

[0146] For example, the ignition point of the flame retardant cover 4 can be measured by heating the flame retardant cover 4 to a state where the flame retardant cover just burns.

[0147] For example, the ignition point of the package structure 1 can be measured by heating the package structure 1 to a state where the package structure just burns.

[0148] In the embodiment of the present disclosure, the ignition points of the flame retardant cover 4 and the wrapping structure 1 are relatively high, and even under the influence of thermal runaway gas at a relatively high temperature, the flame retardant cover 4 and the wrapping structure 1 will basically not be ignited.

[0149] In one embodiment, referring to Figures 1 to 3 and Figure 9 , the package structure 1 includes a housing 13 and a top cover 14 . A pressure relief vent 12 is formed on one side of the housing 13 . The top cover 14 and the housing 13 enclose a receiving space 11 , and the conductive terminal 2 is mounted on the top cover 14 .

[0150] Exemplarily, the mica paper is bonded to the housing 13 .

[0151] In the embodiment of the present disclosure, before the top cover 14 is installed on the shell 13, the conductive terminal 2 on the top cover 14 can be electrically connected to the tab 31 of the battery cell 3, and then the connected top cover 14, conductive terminal 2 and battery cell 3 can be installed to the shell 13, so as to facilitate the connection of the conductive terminal 2 and the battery cell 3 before entering the shell.

[0152] It is understandable that the package structure 1 is not limited to the structure in which the top cover 14 is installed on the shell 13. For example, the package structure 1 can be an integrally formed structure.

[0153] In one embodiment, referring to FIG. 1 to FIG. 3 and FIG. 9 , the top cover 14 has a flange 141 covering the side wall of the housing 13 , and a gap between the flange 141 and the side wall of the housing 13 is less than or equal to 0.5 mm.

[0154] Exemplarily, the gap between the flange 141 and the side wall of the housing 13 may be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm or 0.1 mm.

[0155] For example, before the top cover 14 is installed into the shell 13 but before the top cover 14 is connected to the shell 13 , the dimension between the flange 141 and the side wall of the shell 13 can be measured by a feeler gauge, a vernier caliper, or a micrometer.

[0156] For example, the span of the flange 141 of the top cover 14 and the corresponding span of the shell 13 can be measured separately by a vernier caliper or a micrometer, and half of the difference between the two is the gap between the top cover 14 and the shell 13.

[0157] For example, referring to FIG. 9 , the gap between the flange 141 and the side wall of the housing 13 is D1 , and D1 ≤ 0.5 mm.

[0158] In the embodiment of the present disclosure, the flange 141 is not completely sealed from the side wall of the shell 13, and the gap between the flange 141 and the side wall of the shell 13 is relatively appropriate, so that the resistance to the escape of thermal runaway gas from between the flange 141 and the side wall of the shell 13 is relatively large, which can better suppress the thermal runaway gas from erupting toward the top cover 14, thereby better guiding the thermal runaway gas in the accommodating space 11 to erupt from the pressure relief port 12, which is beneficial to reducing the degree of thermal runaway of the battery 100.

[0159] In one embodiment, please refer to Figures 4 and 5, the shell 13 includes a plurality of bent plates 131 bent in sequence, and the bent plates 131 at both ends of the circumference of the battery cell 3 are connected. The plurality of bent plates 131 are arranged to form a pressure relief port 12, and the top cover 14 and the pressure relief port 12 are respectively located on opposite sides of the shell 13. The top cover 14 and the plurality of bent plates 131 are arranged to form a receiving space 11. The wrapping structure 1 also includes an insulating layer 15, which covers the inner surface of the shell 13.

[0160] The housing 13 includes a plurality of bent plates 131. The housing 13 is formed by bending a whole plate multiple times and then connecting the bent plates 131 at both ends. The housing 13 is in an unfolded state before being bent.

[0161] Exemplarily, the insulating layer 15 is covered on the housing 13 by hot pressing.

[0162] Exemplarily, the insulating layer 15 is applied to the housing 13 .

[0163] In the embodiment of the present disclosure, the housing 13 is generally flat in the unfolded state. The insulating layer 15 can be first placed over the unfolded housing 13, and then the housing 13 and the insulating layer 15 can be bent together. After the housing 13 is bent and formed, the insulating layer 15 already covers the inner surface of the housing 13. Covering the insulating layer 15 over the housing 13 in the unfolded state allows the insulating layer 15 to be more conveniently installed on the housing 13.

[0164] In one embodiment, referring to Figures 4 and 5, the shell 13 is made of metal, and the battery 100 further includes a reinforcing plate 6, which is located on the inner surface of the shell 13. The bent plates 131 at both ends of the battery cell 3 are connected by welding. The welding positions of the bent plates 131 at both ends of the battery cell 3 are target positions, and the reinforcing plate 6 is welded to the shell 13 at the target position.

[0165] It should be noted that the reinforcing plate 6 is welded to the housing 13 , and the material of the reinforcing plate 6 is a material that can be welded to the housing 13 .

[0166] Exemplarily, the material of the housing 13 and the material of the reinforcing plate 6 are both metal.

[0167] In the embodiment of the present disclosure, the shell 13 and the reinforcing plate 6 are welded together by welding the reinforcing plate 6 to the shell 13 at the target position. The reinforcing plate 6 supports the shell 13 at the target position, reducing the possibility of the bent plates 131 at both ends of the shell 13 being welded through during the welding process.

[0168] In one embodiment, referring to FIG. 6 , the housing 13 is made of metal, and has a thickness of 0.1 mm to 1 mm.

[0169] For example, referring to FIG. 6 , the thickness of the housing 13 is D2 , and 0.1 mm ≤ D2 ≤ 1 mm.

[0170] Illustratively, the thickness of the housing 13 may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.8 mm, or 1 mm.

[0171] In the embodiment of the present disclosure, the shell 13 is made of metal material, and the thickness of the shell 13 is set to be relatively appropriate, so that the shell 13 is relatively light in weight while having a basically sufficient bearing capacity.

[0172] In one embodiment, referring to FIG. 6 , the housing 13 is made of plastic and is an integrally formed structure. The thickness of the housing 13 is 1 mm to 3 mm.

[0173] For example, referring to FIG. 6 , the thickness of the housing 13 is D2 , 1 mm ≤ D2 ≤ 3 mm.

[0174] Exemplarily, referring to FIG. 6 , the thickness of the housing 13 may be 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.6 mm, 2.9 mm, or 3 mm.

[0175] In the embodiment of the present disclosure, the shell 13 is made of a plastic material, and the thickness of the shell 13 is set to be relatively appropriate, so that the shell 13 is relatively light in weight while having a substantially sufficient bearing capacity.

[0176] In one embodiment, referring to FIG. 1 to FIG. 3 , the top cover 14 is made of plastic, and the housing 13 is made of metal or plastic.

[0177] In one embodiment, referring to FIG. 1 to FIG. 3 , the top cover 14 is made of plastic, the shell 13 is made of metal or plastic, and the flame retardant cover 4 is made of mica.

[0178] Exemplarily, the shell 13 may be made of metal such as steel, aluminum, aluminum alloy, copper or copper alloy.

[0179] Illustratively, the aluminum alloy may be an aluminum-magnesium alloy.

[0180] For example, the top cover 14 may be made of engineering plastics such as polypropylene or polyethylene.

[0181] In the embodiment of the present disclosure, the top cover 14 is made of plastic material, so that the top cover 14 has a certain pressure bearing capacity. The shell 13 is made of plastic material or metal material, so that the shell 13 has a certain pressure bearing capacity.

[0182] It is understandable that the material of the flame retardant cover is not limited to mica. For example, the material of the flame retardant cover can be glass fiber.

[0183] In one embodiment, referring to FIG. 1 to FIG. 3 , the conductive terminal 2 and the pressure relief port 12 are respectively located on two opposite sides of the package structure 1 .

[0184] In the disclosed embodiment, because the conductive terminals 2 and the pressure relief vent 12 are located on opposite sides of the package structure 1, the conductive terminals 2 can be positioned as far away from the pressure relief vent 12 as possible. The thermal runaway gas ejected from the pressure relief vent 12 and the substances carried by the thermal runaway gas can be kept away from the conductive terminals 2. Accordingly, in at least two sequentially arranged batteries 100, the pressure relief vents 12 of the at least two sequentially arranged batteries 100 can be positioned as far away from the conductive terminals 2 of the at least two sequentially arranged batteries 100 as possible. This can reduce the possibility of the thermal runaway gas ejected from the pressure relief vents 12 of the at least two sequentially arranged batteries 100 being ejected toward the conductive terminals 2 of an adjacent battery 100, causing a short circuit in the adjacent battery 100, thereby minimizing the possibility of thermal runaway spreading to adjacent batteries 100.

[0185] It is understandable that the arrangement of the conductive terminals 2 and the pressure relief vents 12 is not limited. For example, the wrapping structure 1 is arranged in a direction toward the conductive terminals 2 and in a cross arrangement toward the pressure relief vents 12 .

[0186] The presently disclosed embodiment further provides a battery module, as shown in FIG10 . The battery module includes at least two batteries 100 according to any one of the above embodiments, wherein the at least two batteries 100 are arranged in sequence, and the conductive terminals 2 of the at least two batteries 100 arranged in sequence are oriented in the same direction. In the at least two batteries 100 arranged in sequence, the conductive terminals 2 are oriented in a direction that is cross-arranged with the direction in which the at least two batteries 100 are arranged in sequence.

[0187] In the embodiment of the present disclosure, by locating the conductive terminal 2 and the pressure relief vent 12 on different sides of the wrapping structure 1, the conductive terminals 2 facing the same direction, and the conductive terminals 2 facing in a direction that crosses the direction in which the batteries 100 are arranged, the possibility of thermal runaway gas ejected from the pressure relief vent short-circuiting the conductive terminal 2 of an adjacent battery 100 can be reduced, thereby reducing the possibility of thermal runaway spreading to the adjacent battery 100.

[0188] In one embodiment, referring to Figures 1 to 9 , a battery 100 includes a top cover 14, a soft-pack battery cell, a housing 13, and mica paper. The top cover 14 can be used to assemble the housing 13. The housing 13 includes five bent plates 131 that are bent in sequence. The five bent plates 131 of the housing 13 block the accommodating space 11 in four directions corresponding to the accommodating space 11. The top cover 14 is mounted on the housing 13 and blocks the accommodating space 11 in the direction from the accommodating space 11 toward the top cover 14. That is, the housing 13 and the top cover 14 block the accommodating space 11 in five directions. The battery cell 3 is mounted in the housing 13, and the mica paper covers the pressure relief vent 12 of the housing 13. In the event of thermal runaway of the soft-pack battery cell within the housing 13, the gases generated by the thermal runaway and the substances carried by the gases are ejected from the mica paper at the pressure relief vent 12, thereby achieving directional ejection of the soft-pack battery cell. The housing 13, the top cover 14 and the accommodating space 11 sealed by the mica paper do not need to be completely sealed, as long as they can guide the directional eruption of the gas generated by thermal runaway. The mica paper is bonded to the housing 13. There is a notch 41 on the mica paper, and the notch 41 is located in the area corresponding to the pressure relief port 12 of the housing 13. The notch 41 can form a blasting point during the occurrence of thermal runaway. A through hole 42 is formed on the mica paper for the structure in the accommodating space 11 to extend out. The top cover 14 is an injection-molded part, and the conductive terminal 2 is a tab embedded in the top cover 14. Other metal inserts can also be embedded in the top cover 14. The top cover 14 and the housing 13 can be connected in various forms such as bonding, hot pressing or welding. The top cover 14 and the housing 13 do not need to be completely sealed. A gap of less than or equal to 0.5 mm can be provided between the top cover 14 and the housing 13, or other structures can be provided to suppress the eruption of thermal runaway gases from between the housing 13 and the top cover 14 to a certain extent. The housing 13 contains soft-pack battery cells. Other structures other than soft-pack battery cells can also be placed in the housing 13. The number of battery cells in the housing 13 is greater than or equal to 1 and less than or equal to 4. The housing 13 is a metal housing 13 with a thickness of 0.1 mm to 1 mm. The interior of the housing 13 is sprayed with an insulating coating or a hot-pressed insulating layer 15.

[0189] For example, please refer to Figures 4 and 5. The shell 13 is formed by bending a plate. The shell 13 includes a plurality of bent plates 131 bent in sequence. The bent plates 131 at both ends of the circumference of the battery cell 3 are connected by welding to splice a continuous annular shell 13. The number of welds in the shell 13 is one weld. A reinforcing plate 6 can be arranged at the weld position to reduce the possibility of the corresponding bent plate 131 being welded through.

[0190] For example, the two parts of the shell 13 may be welded into the annular shell 13 through two welds at different positions.

[0191] For example, the housing 13 may be formed in one piece without welding.

[0192] For example, the bent plates 131 at both ends of the housing 13 along the circumference of the battery cell 3 may be formed by bonding or other methods in addition to welding.

[0193] For example, the housing 13 may be integrally formed of high-temperature resistant plastic, and the thickness of the housing 13 may be 1 mm to 3 mm.

[0194] The above embodiments are intended only to illustrate the technical solutions of the present disclosure, and are not intended to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions and are intended to be included within the scope of the present disclosure. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts.

Claims

1. A battery comprising: A wrapping structure forms a receiving space, a pressure relief port connected to the receiving space is formed on one side of the wrapping structure, and the rest of the wrapping structure is a sealing structure; a conductive terminal connected to the package structure, wherein the conductive terminal and the pressure relief port are located on different sides of the package structure; A battery cell is located in the accommodation space, and a tab of the battery cell is electrically connected to the conductive terminal.

2. The battery according to claim 1, wherein The number of the battery cells is at least two, and the conductive terminal includes a sampling electrode and at least two transfer electrodes, wherein one transfer electrode is electrically connected to the tab of one of the battery cells, and the other transfer electrode is electrically connected to the tab of the other battery cell, and the polarities of the tabs corresponding to the two transfer electrodes are opposite, and the sampling electrodes are respectively electrically connected to the tabs of the corresponding two battery cells, and the polarities of the tabs of the corresponding two battery cells electrically connected to the sampling electrodes are opposite.

3. The battery according to claim 1 or 2, wherein The conductive terminal and the pressure relief port are respectively located on two opposite sides of the wrapping structure.

4. The battery according to any one of claims 1 to 3, wherein The battery further includes a flame-retardant cover covering the pressure relief port, and the pressure bearing capacity of the wrapping structure is greater than the pressure bearing capacity of the flame-retardant cover.

5. The battery according to claim 4, wherein The flame retardant cover is made of mica.

6. The battery according to claim 4 or 5, wherein The flame retardant cover is formed with notches.

7. The battery according to any one of claims 4 to 6, wherein The flame-retardant cover is formed with a through hole connected to the storage space. The battery also includes a temperature-regulating container partially located in the storage space. The battery cell is arranged on one side or two opposite sides of the temperature-regulating container. The temperature-regulating container has a temperature-regulating cavity and an inlet and an outlet respectively connected to the temperature-regulating cavity. The temperature-regulating container is passed through the through hole so that the inlet and the outlet are exposed outside the storage space along the wrapping structure toward one side of the flame-retardant cover.

8. The battery according to any one of claims 4 to 7, wherein The ignition point of the flame retardant cover and the ignition point of the wrapping structure are both greater than or equal to 800°C.

9. The battery according to any one of claims 1 to 8, wherein The package structure includes: a housing, wherein the pressure relief port is formed on one side of the housing; The top cover and the shell are configured to form a receiving space, and the conductive terminal is installed on the top cover.

10. The battery according to claim 9, wherein The top cover has a flange covering the side wall of the shell, and a gap between the flange and the side wall of the shell is less than or equal to 0.5 mm.

11. The battery according to claim 9 or 10, wherein The shell includes a plurality of bent plates that are bent in sequence, and the bent plates at both ends of the circumference of the battery cell are connected. The plurality of bent plates are arranged to form the pressure relief port. The top cover and the pressure relief port are respectively located on opposite sides of the shell. The top cover and the plurality of bent plates are arranged to form the accommodating space. The wrapping structure also includes an insulating layer, and the insulating layer covers the inner surface of the shell.

12. The battery according to claim 11, wherein The shell is made of metal, and the battery also includes a reinforcing plate, which is located on the inner surface of the shell. The bent plates at both ends of the battery cell are connected by welding. The welding positions of the bent plates at both ends of the battery cell are target positions, and the reinforcing plate is welded to the shell at the target position.

13. The battery according to any one of claims 9 to 12, wherein The shell is made of metal, and has a thickness of 0.1 mm to 1 mm.

14. The battery according to any one of claims 9 to 12, wherein The shell is made of plastic and is an integrally formed structure. The thickness of the shell is 1 mm to 3 mm.

15. The battery according to any one of claims 9 to 14, wherein The top cover is made of plastic, and the shell is made of metal or plastic.

16. The battery according to any one of claims 1 to 15, wherein The battery cell is a soft-pack battery cell.

17. A battery pack comprising: Box; The battery according to any one of claims 1 to 16, located in the box.

18. The battery pack according to claim 17, wherein: The number of batteries in the box is at least two, and the at least two batteries are arranged in sequence. The conductive terminals of the at least two batteries arranged in sequence are oriented in the same direction. In the at least two batteries arranged in sequence, the orientation of the conductive terminals is arranged crosswise to the direction in which the at least two batteries are arranged in sequence.

19. An electrical device comprising: Device body; The battery pack according to claim 17 or 18 is mounted on the device body to supply power to the device body.

20. A battery module comprising at least two batteries according to any one of claims 1 to 16, wherein the at least two batteries are arranged in sequence, the conductive terminals of the at least two batteries arranged in sequence are oriented in the same direction, and the conductive terminals of the at least two batteries arranged in sequence are oriented in a direction that is cross-arranged with the direction in which the at least two batteries are arranged in sequence.

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