Battery and electric device

Abstract

The present application belongs to the technical field of batteries and discloses a battery and an electric device. The battery comprises a first battery module and an isolation component, wherein the first battery module comprises a plurality of battery cells stacked in a second direction; the isolation component is located on the side of the first battery module in a first direction; a pressure relief mechanism is disposed on the side of each battery cell in the first battery module that faces the isolation component; the isolation component has a collection chamber therein; the collection chamber is used for collecting emissions from the battery cells when the pressure relief mechanisms are actuated; in the second direction, the pressure relief mechanisms of two adjacent battery cells in the first battery module are staggered from each other; and the second direction intersects with the first direction. The battery has relatively high reliability.

Description

Battery and electric device Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202410636140.1, filed on May 21, 2024, entitled “Battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery and an electric device. BACKGROUND

[0003] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0004] How to improve the reliability of the battery is a problem to be solved in the battery technology. SUMMARY

[0005] In view of the above problems, the present application provides a battery and an electric device, which can improve the reliability of the battery.

[0006] In a first aspect, the present application provides a battery, the battery comprising a first battery module and a separation component, the first battery module comprising a plurality of battery cells stacked along a second direction. The separation component is located on one side of the first battery module in a first direction. The side of the battery cells in the first battery module facing the separation component is provided with a pressure relief mechanism, and the inside of the separation component has a collection cavity for collecting the discharge of the battery cells when the pressure relief mechanism is actuated. In the second direction, the pressure relief mechanisms of two adjacent battery cells in the first battery module are staggered with each other, and the second direction intersects the first direction.

[0007] In the technical solution of the present application, it is beneficial to reduce the risk of one of the two adjacent battery cells in the first battery module triggering thermal runaway of the other, and to reduce the risk of the spread of thermal runaway of the battery cells, thereby improving the reliability of the battery.

[0008] In one or more embodiments of the first aspect, the battery further comprises a second battery module, the first battery module and the second battery module are arranged in layers along the first direction, and the separation component is located between the first battery module and the second battery module along the first direction. The second battery module comprises a plurality of battery cells stacked along the second direction, and the side of the battery cells in the second battery module facing the separation component is provided with a pressure relief mechanism.

[0009] In the above scheme, the emission of the battery cell in the first battery module in thermal runaway and the emission of the battery cell in the second battery module in thermal runaway can share one collection cavity. On the one hand, it is beneficial to save the space inside the battery and improve the energy density of the battery. On the other hand, since the emission of the battery cell in thermal runaway can be collected by the collection cavity, the risk of the emission short-circuiting the battery cell in the first battery module and / or short-circuiting the battery cell in the second battery module can be reduced, and at the same time, the risk of thermal runaway spreading can be reduced, and the reliability of the battery can be improved.

[0010] In one or more embodiments of the first aspect, in the first direction, the projection of the pressure relief mechanism of the first battery module and the projection of the pressure relief mechanism of the second battery module do not overlap.

[0011] In the above scheme, the risk of the battery cell in one of the first battery module and the second battery module in thermal runaway triggering the battery cell in the other one to also be in thermal runaway can be reduced, the risk of thermal runaway spreading of the battery cell can be further reduced, and thus the reliability of the battery can be further improved.

[0012] In one or more embodiments of the first aspect, in the second direction, the pressure relief mechanisms of two adjacent battery cells in the second battery module are staggered with each other.

[0013] In the above scheme, the risk of one of the two adjacent battery cells in the second battery module in thermal runaway triggering the other one to also be in thermal runaway can be reduced, and the reliability of the battery can be improved.

[0014] In one or more embodiments of the first aspect, the isolation component has a first surface facing the first battery module. The first surface is provided with a plurality of first through holes, the first through holes are in communication with the collection cavity, and the pressure relief mechanism of the first battery module is correspondingly arranged with the first through holes.

[0015] In the above scheme, the first through holes can guide the emission of the battery cell in the first battery module in thermal runaway to reduce the risk of random flow of the emission, and the reliability of the battery can be improved. In addition, by guiding the emission through the first through holes, there is no need to set an additional flow guide channel, and the energy density of the battery can be improved.

[0016] In one or more embodiments of the first aspect, the first battery module includes a plurality of first battery cells and a plurality of second battery cells, the first battery cells and the second battery cells are alternately arranged along a second direction, and the second direction is perpendicular to the first direction. The side of the first battery cell facing the isolation component is provided with a first pressure relief mechanism, the side of the second battery cell facing the isolation component is provided with a second pressure relief mechanism, and the first pressure relief mechanism and the second pressure relief mechanism are staggered with each other.

[0017] In the above scheme, by staggering the first pressure relief mechanism and the second pressure relief mechanism of the first battery monomer and the second battery monomer arranged alternately, the pressure relief mechanisms of the two adjacent battery monomers of the first battery module are staggered, the assembly of the first battery module can be completed by only changing the assembly direction of the first battery monomer and the second battery monomer, the assembly efficiency and cost are low, and the manufacturing cost of the battery is also relatively low.

[0018] In one or more embodiments of the first aspect, the plurality of first through holes are arranged in two rows, one row of first through holes corresponding to the plurality of first pressure relief mechanisms, and the other row of first through holes corresponding to the plurality of second pressure relief mechanisms.

[0019] In the above scheme, the first through holes arranged in rows can serve as an assembly reference for the first battery monomer and the second battery monomer, facilitating the pre-positioning of the first battery monomer and the second battery monomer, and helping to reduce the assembly difficulty of the first battery module.

[0020] In one or more embodiments of the first aspect, the first surface is provided with two first barriers, the two first barriers are spaced apart along a third direction, and the plurality of first through holes are located between the two first barriers. The first barrier extends along a second direction, and the second direction, the first direction, and the third direction are perpendicular to each other.

[0021] In the above scheme, since the plurality of first through holes are located between the two first barriers, the two first barriers can reduce the risk that the discharge of the battery monomer that has thermal runaway due to the blocking of part of the first through holes by foreign matter cannot flow into the collection cavity in time, thereby triggering thermal runaway of the remaining battery monomers.

[0022] In one or more embodiments of the first aspect, the first surface is provided with a first adhesive, the first adhesive is located on the side of the first barrier away from the plurality of first through holes along the third direction, and the first battery module is connected to the first surface through the first adhesive.

[0023] In the above scheme, the arrangement of the first adhesive and the first barrier not only enables the first battery module and the isolation component to have high connection strength, but also reduces the risk that the discharge of the battery monomer that has thermal runaway due to the blocking of part of the first through holes by the first adhesive cannot flow into the collection cavity in time, thereby triggering thermal runaway of the remaining battery monomers.

[0024] In one or more embodiments of the first aspect, the battery further comprises a first one-way valve, and the first one-way valve is arranged at the first through hole.

[0025] The first one-way valve can reduce the risk that the discharge of the thermal runaway battery cell in the second battery module flows out of the collection cavity and triggers the thermal runaway of the battery cell in the first battery module, and can further reduce the risk of the thermal runaway of the battery cell spreading, thereby further improving the reliability of the battery.

[0026] In one or more embodiments of the first aspect, the first one-way valve comprises a first valve leaflet, and an edge of the first valve leaflet is connected to the isolation component, and a middle part of the first valve leaflet forms a necking part protruding away from the first battery module.

[0027] In the above scheme, the first valve leaflet and the necking part formed on the first valve leaflet form the one-way valve, which can save the space occupied by the one-way valve in the battery, improve the energy density of the battery, and also reduce the assembly cost of the battery.

[0028] In one or more embodiments of the first aspect, the isolation component has a second surface facing the second battery module. The second surface is provided with a plurality of second through holes, and the second through holes are in communication with the collection cavity. The pressure relief mechanism of the second battery module is arranged correspondingly to the second through holes.

[0029] In the above scheme, the second through holes can make the discharge of the thermal runaway battery cell enter the collection cavity through the second through holes, and can guide the discharge of the thermal runaway battery cell in the second battery module to reduce the risk of random flow of the discharge, thereby improving the reliability of the battery. In addition, by guiding the discharge through the second through holes, no additional flow guide channel needs to be arranged, which can improve the energy density of the battery.

[0030] In one or more embodiments of the first aspect, the second battery module comprises a plurality of third battery cells and a plurality of fourth battery cells, and the third battery cells and the fourth battery cells are arranged alternately along a second direction perpendicular to the first direction. The side of the third battery cell facing the isolation component is provided with a third pressure relief mechanism, and the side of the fourth battery cell facing the isolation component is provided with a fourth pressure relief mechanism. The third pressure relief mechanism and the fourth pressure relief mechanism are staggered with each other.

[0031] In the above scheme, by staggering the third pressure relief mechanism and the fourth pressure relief mechanism of the alternately arranged third battery cells and fourth battery cells, the pressure relief mechanisms of the two adjacent battery cells in the second battery module are staggered with each other. The assembly efficiency and cost of the second battery module can be reduced by only changing the assembly direction of the third battery cells and the fourth battery cells, and the manufacturing cost of the battery is also relatively low.

[0032] In one or more embodiments of the first aspect, the plurality of second through holes are arranged in two rows, one row of second through holes corresponds to the plurality of third pressure relief mechanisms, and the other row of second through holes corresponds to the plurality of fourth pressure relief mechanisms.

[0033] In the scheme, the second through holes arranged in rows can serve as assembly reference of the third battery monomer and the fourth battery monomer, facilitate the pre-positioning of the third battery monomer and the fourth battery monomer, and help reduce the assembly difficulty of the fourth battery module.

[0034] In one or more embodiments of the first aspect, the second surface is provided with two second barriers, the two second barriers are spaced apart along a third direction, and the plurality of second through holes are located between the two second barriers. The second barriers extend along a second direction, and the second direction, the first direction, and the third direction are perpendicular to each other.

[0035] In the scheme, since the plurality of second through holes are located between the two second barriers, the two second barriers can reduce the risk that the exhaust of the battery monomer in thermal runaway caused by the second barriers shielding part of the second through holes cannot flow into the collection cavity in time, thereby triggering the remaining battery monomers to also be in thermal runaway.

[0036] In one or more embodiments of the first aspect, the second surface is provided with a second adhesive. Along the third direction, the second adhesive is located on the side of the second barrier away from the plurality of second through holes, and the second battery module is connected to the second surface through the second adhesive.

[0037] In the scheme, the arrangement of the second adhesive and the second barrier not only can make the second battery module and the isolation component have high connection strength, but also can reduce the risk that the exhaust of the battery monomer in thermal runaway caused by the second adhesive shielding part of the second through holes cannot flow into the collection cavity in time, thereby triggering the remaining battery monomers to also be in thermal runaway.

[0038] In one or more embodiments of the first aspect, the battery further comprises a second one-way valve, and the second through hole is provided with the second one-way valve.

[0039] In the scheme, the arrangement of the second one-way valve can reduce the risk that the exhaust of the battery monomer in thermal runaway in the first battery module flows out of the collection cavity and triggers the battery monomers in the second battery module to also be in thermal runaway, help further reduce the risk of the spread of the battery monomers in thermal runaway, and thereby help further improve the reliability of the battery.

[0040] In one or more embodiments of the first aspect, the first battery module and the second battery module are both connected to the isolation component, and the isolation component is used to bear the first battery module and the second battery module.

[0041] In the scheme, the first battery module and the second battery module are both borne by the isolation component, which can not only make the battery have high structural strength, but also can improve the energy density of the battery.

[0042] In one or more embodiments of the first aspect, the interior of the isolation component forms a first flow channel containing the heat exchange medium.

[0043] In the above scheme, the first flow channel does not occupy additional space inside the battery, and can simultaneously exchange heat with the battery cells in the first battery module and the battery cells in the second battery module, thereby improving the reliability and energy density of the battery.

[0044] In one or more embodiments of the first aspect, the first flow channel and the collection cavity have a shared wall.

[0045] In the above scheme, the first flow channel can not only exchange heat with the battery cells under normal working conditions, but also exchange heat with the exhaust of the battery cells in thermal runaway, thereby reducing the risk of thermal runaway and improving the reliability of the battery.

[0046] In one or more embodiments of the first aspect, the battery further includes a box body, and the first battery module, the second battery module, and the isolation component are all arranged in the box body.

[0047] In the above scheme, the box body can isolate the external environment, thereby reducing the risk of thermal runaway of the battery cells in the first battery module and the second battery module caused by contact with foreign matter, and improving the reliability of the battery.

[0048] In one or more embodiments of the first aspect, the isolation component divides the box body into a first cavity and a second cavity, the first battery module is accommodated in the first cavity, and the second battery module is accommodated in the second cavity.

[0049] In the above scheme, the isolation component divides the box body into a first cavity and a second cavity, which can provide a predetermined assembly space for the first battery module and the second battery module. The isolation component serves as an assembly reference, which is beneficial for simplifying the assembly process, facilitating the automatic assembly of the battery, improving the assembly efficiency of the battery, and simplifying the maintenance process of the first battery module and the second battery module, thereby reducing the maintenance cost.

[0050] In one or more embodiments of the first aspect, the box body further includes a first side wall and a second side wall arranged opposite to each other along a third direction, the isolation component connects the first side wall and the second side wall, and the third direction, the second direction, and the first direction are perpendicular to each other.

[0051] In the above scheme, the first side wall and the second side wall can simultaneously define the assembly position of the first battery module and the second battery module in the third direction, which is beneficial for simplifying the assembly process and improving the assembly efficiency.

[0052] In one or more embodiments of the first aspect, the first side wall, the second side wall and the isolation component are integrally formed; or, the first side wall and the isolation component are welded, and the second side wall and the isolation component are welded.

[0053] In the above solution, the integrally formed first side wall, second side wall and isolation component can have high connection strength between the first side wall, the second side wall and the isolation component, which is conducive to improving the structural stability of the battery; the first side wall and the second side wall are connected to the isolation component by welding, which is conducive to reducing the manufacturing cost of the battery.

[0054] In one or more embodiments of the first aspect, the box further comprises a first cover and a second cover, the first cover is connected to the first side wall and the second side wall. The second cover is connected to the first side wall and the second side wall. Along the first direction, the second cover is oppositely arranged with the first cover, the isolation component is located between the first cover and the second cover, the first battery module is located between the first cover and the isolation component, and the second battery module is located between the second cover and the isolation component.

[0055] In the above solution, the detachable first cover and / or second cover can realize the assembly and maintenance of the first battery module and the second battery module, which is conducive to improving the assembly efficiency and reducing the maintenance cost.

[0056] In one or more embodiments of the first aspect, the box further comprises a first end wall and a second end wall, the first end wall and the second end wall are arranged at intervals along the second direction, the isolation component is located between the first end wall and the second end wall, the two ends of the first end wall are respectively connected to the first side wall and the second side wall, and the two ends of the second end wall are respectively connected to the first side wall and the second side wall. The first cover is further connected to the first end wall and the second end wall, and the second cover is further connected to the first end wall and the second end wall.

[0057] In the above solution, the box can be opened or closed only by the first cover and the second cover, which has high assembly efficiency and low maintenance cost.

[0058] In one or more embodiments of the first aspect, a plurality of first battery modules are provided. The battery further comprises a first partition beam, which is arranged on the isolation component and located between adjacent two first battery modules.

[0059] In the above solution, the arrangement of the first partition beam can on the one hand divide one side of the isolation component into a plurality of assembly areas, which is conducive to realizing the positioning of the plurality of first battery modules, simplifying the assembly process and improving the assembly efficiency, and on the other hand, is conducive to improving the bending strength of the isolation component.

[0060] In one or more embodiments of the first aspect, a plurality of second battery modules are provided. The battery further comprises a second partition beam, which is arranged on the isolation component and located between adjacent two second battery modules.

[0061] In the above solution, the second partition beam is arranged on one side of the isolation component to divide the side into a plurality of assembly areas, which is beneficial to the positioning of the plurality of second battery modules, simplifies the assembly process, and improves the assembly efficiency. In addition, the bending strength of the isolation component is improved.

[0062] In one or more embodiments of the first aspect, the first direction is parallel to a direction of gravity.

[0063] In a second aspect, the application provides a power consumption device including the battery in one or more embodiments of the first aspect, and the battery is used to provide electric energy.

[0064] In the above solution, since the battery in one or more embodiments of the first aspect has high reliability, the power consumption device including the battery in one or more embodiments of the first aspect also has high reliability.

[0065] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable other purposes, features and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0066] 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 accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several views that follow. In the drawings:

[0067] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the application;

[0068] FIG. 2 is an exploded view of a battery according to some embodiments of the application;

[0069] FIG. 3 is an exploded view of a battery cell according to some embodiments of the application;

[0070] FIG. 4 is an isometric view of a battery cell according to some other embodiments of the application;

[0071] FIG. 5 is an exploded view of a battery according to some other embodiments of the application;

[0072] FIG. 6 is a partial enlarged view of A in FIG. 5;

[0073] FIG. 7 is an exploded view of a partial structure of a battery according to some other embodiments of the application;

[0074] FIG. 8 is a partial enlarged view of B in FIG. 7;

[0075] Fig. 9 is a sectional view of a partial structure of a battery according to some embodiments of the present application;

[0076] Fig. 10 is a sectional view of a partial structure of a battery according to some embodiments of the present application;

[0077] Fig. 11 is a side view of a battery according to some embodiments of the present application;

[0078] Fig. 12 is a sectional view of Fig. 11 at C-C;

[0079] Fig. 13 is an enlarged view of D in Fig. 12;

[0080] Fig. 14 is a schematic view of a structure of a one-way valve according to some embodiments of the present application;

[0081] Fig. 15 is a sectional view of a partial structure of a battery according to some embodiments of the present application, showing a third pressure relief mechanism and a second pressure relief mechanism.

[0082] Reference Signs in the Detailed Description of the Invention

[0083] 1000 - vehicle; 200 - controller; 300 - motor; 100 - battery; 11 - case; 111 - first case body; 112 - second case body; 113 - first cover; 114 - second cover; 115 - first end wall; 116 - first side wall; 117 - second side wall; 118 - first partition beam; 119 - second partition beam; 120 - second end wall; 12 - battery cell; 121 - housing; 1211 - end cap; 1212 - shell; 122 - electrode assembly; 123 - electrode terminal; 124 - adapter tab; 125 - pressure relief mechanism; 13 - isolation member; 131 - collection cavity; 132 - first surface; 133 - second surface; 134 - first through hole; 135 - first blocking member; 136 - first one-way valve; 1360 - first valve; 1361 - necked portion; 137 - second through hole; 138 - second blocking member; 139 - second one-way valve; 1310 - first flow channel; 14 - first battery module; 141 - first battery cell; 1411 - first pressure relief mechanism; 142 - second battery cell; 1421 - second pressure relief mechanism; 15 - second battery module; 151 - third battery cell; 1511 - third pressure relief mechanism; 152 - fourth battery cell; 1521 - fourth pressure relief mechanism; 16 - bus member; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0084] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0085] Unless otherwise defined, 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 this application; the use of the terms "including," "comprising," "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0086] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0087] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0088] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0089] In the description of the embodiments of the present application, 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", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0090] In the present application, the battery cell can include, but is not limited to, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc. The shape of the battery cell can include, but is not limited to, a cylinder, a flat body, a cuboid, or other shapes, etc. The battery cell can include, but is not limited to, a cylindrical battery cell, a square battery cell, a soft-pack battery cell, and a blade battery cell according to the packaging method.

[0091] In some high-power applications such as electric vehicles, the application of batteries includes three levels: battery cell, battery module, and battery. A battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impacts, heat, vibration, etc. A battery refers to the final state of the battery system installed in an electric vehicle. The battery referred to in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery generally includes a box for packaging one or more battery cells. The box can reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cells.

[0092] In the following, the rectangular battery cell will be mainly discussed. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells or blade battery cells in some aspects.

[0093] In a general battery cell structure, the battery cell includes a housing, an electrode assembly, and an electrolyte. The housing includes an end cap and a case, and the end cap closes the opening of the case to define a receiving space for accommodating the electrode assembly.

[0094] The electrode assembly is accommodated in the receiving space, and the electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer protrudes from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to pass a large current without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. In addition, the forming method of the electrode assembly can include but is not limited to a jelly-roll type or a stacked type, etc.

[0095] The tab generally leads out the electrical energy of the electrode assembly by electrically connecting with a conductive piece, in some cases, the conductive piece is a transition piece connecting the tab and the electrode terminal, and in some other cases, the conductive piece is the electrode terminal.

[0096] The electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For prismatic battery cells, the electrode terminals are generally disposed at the end cap portion. In some other cases, the electrode terminals can also be disposed at the housing portion. A plurality of battery cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0097] For battery cells, there are generally at least three protective measures. Specifically, the protective measures include at least a switching element, selection of appropriate separator material, and a pressure relief component.

[0098] The pressure relief component refers to an element or component that is actuated to release the internal pressure or temperature of the battery cell when the internal pressure or temperature or other conditions of the battery cell reaches a predetermined threshold. The threshold is designed differently according to the design requirements. The threshold can depend on the material of one or several of the positive electrode plate, the negative electrode plate, the electrolyte, and the separator in the battery cell. The pressure relief component can take the form of, for example, a burst valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e., when the internal pressure or temperature or other conditions of the battery cell reaches a predetermined threshold, the pressure relief component performs an action or a weak structure provided in the pressure relief component is broken, thereby forming an opening or passage for the internal pressure or temperature to be released. The weak structure generally has a melting point and / or thickness lower than other regions of the pressure relief component. For example, the weak structure can be a notch groove provided on the surface of the pressure relief component, etc.

[0099] The "actuation" mentioned in the present application refers to the pressure relief component generating an action or being activated to a certain state, so that the internal pressure and temperature of the battery cell can be released, thereby reducing the risk of a more serious accident. The action generated by the pressure relief component can include but is not limited to at least one of the following: breaking, shattering, tearing, melting, or opening, etc. The actuation of the pressure relief component can also be referred to as the opening of the pressure relief component. When the pressure relief component is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged outward from the actuated part as the discharge. In this way, the battery cell can be relieved of pressure and temperature in a controllable manner, thereby reducing the risk of a more serious accident. For example, when a short circuit, overcharge, or the like occurs, it can cause thermal runaway inside the battery cell, resulting in a sudden increase in pressure or temperature. In this case, the internal pressure and temperature can be released outward by the pressure relief component to reduce the probability of explosion or fire of the battery cell.

[0100] The discharge from the battery cell mentioned in the present application includes but is not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gas generated by the reaction, flame, etc.

[0101] The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and also needs to consider the reliability of the battery.

[0102] A general battery includes a plurality of battery cells, and the distance between the pressure relief mechanisms of adjacent battery cells in the plurality of battery cells is close. When one of the battery cells is in thermal runaway, the risk of triggering thermal runaway of the remaining battery cells is high, and the reliability of the battery is poor.

[0103] In view of this, the present application provides a battery, which includes a first battery module and a separation component. The first battery module includes a plurality of battery cells stacked in a second direction. The separation component is located on one side of the first battery module in a first direction. The side of the battery cells in the first battery module facing the separation component is provided with a pressure relief mechanism, and the inside of the separation component has a collection cavity for collecting the emissions of the battery cells when the pressure relief mechanism is actuated. In the second direction, the pressure relief mechanisms of two adjacent battery cells in the first battery module are staggered with each other, and the second direction intersects the first direction. The above-mentioned battery is beneficial to reduce the risk of triggering thermal runaway of one of the two adjacent battery cells in the first battery module, and is beneficial to reduce the risk of thermal runaway of the battery cells, thereby improving the reliability of the battery.

[0104] The technical solutions described in the embodiments of the present application are applicable to batteries and electric devices using batteries.

[0105] The electric device includes but is not limited to: electric vehicles, electric vehicles, ships and spacecraft, etc., for example, spacecraft includes airplanes, rockets, space shuttles and spaceships, etc.

[0106] The following embodiments are described for convenience with a vehicle 1000 as an example of an electric device of an embodiment of the present application.

[0107] For example, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 can be provided with a motor 300, a controller 200, and a battery 100. The controller 200 is used to control the power supply of the battery 100 to the motor 300. For example, the battery 100 can be arranged at the bottom, the front, or the rear of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000. For example, the battery 100 can be used as an operating power source of the vehicle 1000, and can be used for the circuit system of the vehicle 1000, such as the power demand for starting, navigation, and operation of the vehicle 1000. In another embodiment of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0108] In order to meet different power demands, the battery 100 can include a plurality of battery cells 12. The plurality of battery cells 12 can be connected in series, in parallel, or in a mixed connection. The mixed connection refers to a mixture of series connection and parallel connection. The battery 100 can also be referred to as a battery pack. Alternatively, the plurality of battery cells 12 can be connected in series, in parallel, or in a mixed connection to form a battery module, and the plurality of battery modules can be connected in series, in parallel, or in a mixed connection to form the battery 100. That is, the plurality of battery cells 12 can be directly connected to form the battery 100, or the plurality of battery cells 12 can be connected to form a battery module, and the battery module can be connected to form the battery 100.

[0109] For example, please refer to FIG. 2, which is an exploded view of the battery 100 according to some embodiments of the present application. The battery 100 can include a plurality of battery cells 12. The battery 100 can also include a box body 11, which is a hollow structure, and the plurality of battery cells 12 are contained in the box body 11. As shown in FIG. 2, hereinafter referred to as a first box body 111 and a second box body 112, the first box body 111 and the second box body 112 are buckled together. The shapes of the first box body 111 and the second box body 112 can be determined according to the shape of the plurality of battery cells 12 combined together. The first box body 111 and the second box body 112 can each have an opening surface. For example, the first box body 111 and the second box body 112 can each be a hollow cuboid and have only one surface as an opening surface. The opening surface of the first box body 111 and the opening surface of the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled to each other to form the box body 11 with a closed cavity. The plurality of battery cells 12 combined in parallel, in series, or in a mixed connection are placed in the box body 11 formed by buckling the first box body 111 and the second box body 112.

[0110] Optionally, the battery 100 can further include other structures, which are not described herein. For example, the battery 100 can further include a busbar component 16 for realizing electrical connection between the plurality of battery cells 12, such as parallel connection, series connection or mixed connection. Specifically, the busbar component 16 can realize electrical connection between the battery cells 12 by connecting the electrode terminals 123 of the battery cells 12. Further, the busbar component 16 can be fixed to the electrode terminals 123 of the battery cells 12 by welding. The electrical energy of the plurality of battery cells 12 can be further led out through the box 11 by the conductive mechanism.

[0111] According to different power requirements, the number of battery cells 12 can be set to any value. The plurality of battery cells 12 can be connected in series, parallel or mixed connection to achieve larger capacity or power. Since the number of battery cells 12 included in each battery 100 can be large, in order to facilitate installation, the battery cells 12 can be arranged in groups, and each group of battery cells 12 forms a battery module. The number of battery cells 12 included in the battery module is not limited and can be set according to requirements. The battery 100 can include a plurality of battery modules, and these battery modules can be connected in series, parallel or mixed connection.

[0112] Please refer to FIG. 3, which is an exploded view of the battery cell 12 according to some embodiments of the present application. The battery cell 12 includes one or more electrode assemblies 122 and a shell 121. The shell 121 can include a housing 1212, and the plurality of walls of the housing 1212, i.e. the plurality of walls of the shell 121, enclose a cavity which can be used to accommodate the electrode assembly 122. The shape of the housing 1212 is determined according to the shape of the combined one or more electrode assemblies 122. For example, the housing 1212 can be a hollow cuboid or a square or a regular polyhedron, and one of the faces of the housing 1212 has an opening so that the one or more electrode assemblies 122 can be placed inside the housing 1212. The housing 1212 is filled with an electrolyte, such as an electrolyte solution.

[0113] The battery cell 12 can further include two electrode terminals 123, which can be arranged on the end cover 1211. The end cover 1211 is usually flat, and the two electrode terminals 123 are fixed to the flat surface of the end cover 1211. The two electrode terminals 123 are respectively a positive electrode terminal and a negative electrode terminal. Each electrode terminal 123 is respectively provided with a jumper 124, which is located between the end cover 1211 and the electrode assembly 122, and is used to realize electrical connection between the electrode assembly 122 and the electrode terminal 123. In the battery cell 12, according to actual use requirements, the electrode assembly 122 can be arranged as a single electrode assembly or a plurality of electrode assemblies, and the battery cell 12 is provided with a plurality of independent electrode assemblies 122.

[0114] According to some embodiments of the present application, referring to FIGS. 3-6, the battery 100 comprises a first battery module 14 comprising a plurality of battery cells 12 stacked along a second direction Y and an isolation component 13 located on one side of the first battery module 14 in a first direction X. The side of the battery cells 12 in the first battery module 14 facing the isolation component 13 is provided with a pressure relief mechanism 125, and the inside of the isolation component 13 has a collection cavity 131 for collecting the discharge of the battery cells 12 when the pressure relief mechanism 125 is actuated. In the second direction Y, the pressure relief mechanisms 125 of two adjacent battery cells 12 in the first battery module 14 are staggered with each other, and the second direction Y intersects the first direction X.

[0115] The first battery module 14 can comprise a plurality of battery cells 12 stacked in a direction, which can also be referred to as a first battery pack. For example, in some embodiments, referring to FIG. 5, the plurality of battery cells 12 are stacked along the second direction Y to form the first battery module 14, and the battery 100 shown in FIG. 5 comprises four first battery modules 14. In other embodiments, the battery 100 can only comprise four first battery modules 14.

[0116] In some embodiments, the battery cell 12 is flat, and the second direction Y is the thickness direction of the wall with the largest area among the walls of the housing 121 of the battery cell 12.

[0117] In some embodiments, a plurality of first battery modules 14 are provided, and all the first battery modules 14 can share one battery monitoring and management device.

[0118] In some embodiments, each first battery module 14 shares one independent battery monitoring and management device, and each second battery module 15 uses one independent battery monitoring and management device.

[0119] The pressure relief mechanisms 125 of two adjacent battery cells 12 in the first battery module 14 are staggered with each other, which means that when one of the battery cells 12 is in thermal runaway, the risk of mis-triggering the pressure relief mechanism 125 of the adjacent battery cell 12 by the high-temperature and high-pressure discharge can be reduced, and to some extent, the risk of causing the adjacent battery cell 12 to be in thermal runaway by the battery cell 12 in thermal runaway can also be reduced.

[0120] The material of the isolation component 13 can be various, such as copper, iron, aluminum, steel, aluminum alloy, plastic, etc.

[0121] The pressure relief mechanism 125 can be various possible pressure relief mechanisms, and the embodiments of the present application are not limited thereto. For example, the pressure relief mechanism 125 can be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 12 provided with the pressure relief mechanism 125 reaches a threshold value; for example, the pressure relief mechanism 125 can be a pressure-sensitive pressure relief mechanism configured to break when the internal air pressure of the battery cell 12 provided with the pressure relief mechanism 125 reaches a threshold value.

[0122] The battery module is carried by the wall portion of the box 11 or the partition member 13, and can be referred to as being fixedly installed on the wall portion of the box 11 or the partition member 13, or as being supported by the weight of the wall portion of the box 11 or the partition member 13. For example, the battery cells 12 in the first battery module 14 can be adhered to the partition member 13 by glue, and such a configuration can be referred to as the first battery module 14 being carried by the partition member 13. For another example, the battery cells 12 in the first battery module 14 can be installed on the partition member 13 by fasteners and glue, and such a configuration can be referred to as the first battery module 14 being carried by the partition member 13. The wall portion of the box 11 can be a wall portion defining a containing space, or can be a wall portion formed by a plate body arranged in the box 11 and spaced apart from the partition member 13.

[0123] The first battery module 14 can be carried by the box 11 of the battery 100, or can be carried by the partition member 13.

[0124] In some embodiments, the partition member 13 can be formed by an extrusion process, and at least one cavity of the partition member 13 is formed together during the processing of the partition member 13, one of which can be used as the collection cavity 131. In other embodiments, the partition member 13 can also include two plate bodies, one of which is punched to form a groove, and the other of which closes the slot of the groove to form the collection cavity 131.

[0125] The collection cavity 131 can be one cavity, or can be a plurality of cavities arranged at intervals.

[0126] In the technical solutions of the embodiments of the present application, the risk of one of the two adjacent battery cells 12 in the first battery module 14 triggering thermal runaway of the other battery cell 12 is reduced, the risk of thermal runaway of the battery cell 12 spreading is reduced, and thus the reliability of the battery 100 is improved.

[0127] According to some embodiments of the present application, referring to FIGS. 3-6, the battery 100 further comprises a second battery module 15, the first battery module 14 and the second battery module 15 are arranged in a stack along the first direction X, and the isolation component 13 is located between the first battery module 14 and the second battery module 15 along the first direction X. The second battery module 15 comprises a plurality of battery cells 12 stacked along the second direction Y, and the side of the battery cells 12 in the second battery module 15 facing the isolation component 13 is provided with a pressure relief mechanism 125.

[0128] The second battery module 15 can comprise a plurality of battery cells 12 stacked in sequence along a direction, which can also be referred to as a second battery pack. For example, in some embodiments, referring to FIG. 5, the plurality of battery cells 12 are stacked along the second direction Y to form the first battery module 14, and the battery 100 shown in FIG. 5 comprises four first battery modules 14.

[0129] In some embodiments, a plurality of second battery modules 15 are provided, and all the second battery modules 15 can share one battery monitoring and management device.

[0130] The structural form of the battery cells 12 in the first battery module 14 can be the same as or different from that of the battery cells 12 in the second battery module 15. In some embodiments, the battery cell 12 comprises a first wall and a second wall arranged oppositely, an electrode terminal 123, and a pressure relief mechanism 125, and the first wall is located between the isolation component 13 and the second wall. The electrode terminal 123 of the battery cell 12 in the first battery module 14 can be arranged on the first wall and / or the second wall, and the pressure relief mechanism 125 of the battery cell 12 in the first battery module 14 is arranged on the first wall. The electrode terminal 123 of the battery cell 12 in the second battery module 15 can be arranged on the first wall and / or the second wall, and the pressure relief mechanism 125 of the battery cell 12 in the second battery module 15 is arranged on the first wall.

[0131] In some embodiments, along the first direction X, the electrode terminal 123 of the battery cell 12 in the first battery module 14 and the electrode terminal 123 of the battery cell 12 in the second battery module 15 are both arranged on the side of the battery cell 12 away from the isolation component 13, that is, the electrode terminal 123 of the battery cell 12 and the pressure relief mechanism 125 are located on different sides of the battery cell 12 along the first direction X.

[0132] In some embodiments, the battery 100 can further comprise busbar components 16, which are provided in two, a first busbar component and a second busbar component. The first battery modules 14 are provided in a plurality, and the second battery modules 15 are provided in a plurality. The first busbar component can be used to achieve the electrical connection of the battery cells 12 of one of the first battery modules 14, or can be used to achieve the electrical connection of the battery cells 12 of all the first battery modules 14. The second busbar component can be used to achieve the electrical connection of the battery cells 12 of one of the second battery modules 15, or can be used to achieve the electrical connection of the battery cells 12 of all the second battery modules 15. In the first direction X, the first busbar component is arranged on the side of the first battery modules 14 away from the isolation component 13, and the second busbar component is arranged on the side of the second battery modules 15 away from the isolation component 13. With such an arrangement, since the pressure relief mechanism 125 and the busbar component 16 are respectively located on both sides of the battery cell 12, the busbar component 16 does not need to be provided with a relief hole for avoiding the pressure relief mechanism 125, and the size of the busbar component 16 does not need to be increased under the premise of meeting the electrical connection of the battery cell 12, which is conducive to improving the energy density of the battery 100 and reducing the manufacturing cost of the battery 100. At the same time, the busbar component 16 will not be damaged when the pressure relief mechanism 125 is actuated, and the collection cavity 131 concentrates the collection of the discharge, which is conducive to reducing the risk of more serious accidents caused by the spread of thermal runaway.

[0133] The second battery modules 15 can be carried by the box 11 of the battery 100, or can be carried by the isolation component 13. For example, in some embodiments, the first battery modules 14 are carried by the isolation component 13, and the second battery modules 15 are carried by the wall portion of the box 11. For example, in some embodiments, the first battery modules 14 are carried by the wall portion of the box 11, and the second battery modules 15 are carried by the isolation component 13.

[0134] The collection cavity 131 is used to collect the discharge of the battery cell 12 when the pressure relief mechanism 125 is actuated, which means that the first battery modules 14 and the second battery modules 15 share one collection cavity 131. In some embodiments, a plurality of flow guide channels can be provided on the isolation component 13, some of which are used to guide the discharge of the battery cell 12 of the first battery module 14 when thermal runaway occurs to the collection cavity 131, and some of which are used to guide the discharge of the battery cell 12 of the second battery module 15 when thermal runaway occurs to the collection cavity 131.

[0135] In the above scheme, the emission of the battery monomer 12 in the first battery module 14 when thermal runaway occurs and the emission of the battery monomer 12 in the second battery module 15 when thermal runaway occurs can share one collection cavity 131. On the one hand, it is beneficial to save the space inside the battery 100 and improve the energy density of the battery 100. On the other hand, since the emission of the battery monomer 12 when thermal runaway occurs will be collected by the collection cavity 131, it can reduce the risk of the emission short-circuiting the battery monomer 12 in the first battery module 14 and / or short-circuiting the battery monomer 12 in the second battery module 15, and at the same time, it is also beneficial to reduce the risk of thermal runaway spreading, thereby improving the reliability of the battery 100.

[0136] According to some embodiments of the present application, referring to FIGS. 3-6, in the first direction X, the projection of the pressure relief mechanism 125 of the first battery module 14 and the projection of the pressure relief mechanism 125 of the second battery module 15 do not overlap.

[0137] In the first direction X, the projection of the pressure relief mechanism 125 of the first battery module 14 and the projection of the pressure relief mechanism 125 of the second battery module 15 do not overlap, which means that when the battery monomer 12 of the first battery module 14 is relieved, the emitted emission will not be directly opposite to the battery monomer 12 of the second battery module 15, and similarly, when the battery monomer 12 of the second battery module 15 is relieved, the emitted emission will not be directly opposite to the battery monomer 12 of the first battery module 14.

[0138] In some embodiments, in the first direction X, the battery monomer 12 of the first battery module 14 corresponds to the battery monomer 12 of the second battery module 15 one by one, but the projection of the pressure relief mechanism 125 of the first battery module 14 and the projection of the pressure relief mechanism 125 of the second battery module 15 do not overlap. In other embodiments, in the first direction X, the battery monomer 12 of the first battery module 14 and the battery monomer 12 of the second battery module 15 are staggered with each other, and the projections of the pressure relief mechanisms 125 of the two do not overlap.

[0139] In the above scheme, it is beneficial to reduce the risk that the thermal runaway of the battery monomer 12 in one of the first battery module 14 and the second battery module 15 triggers the thermal runaway of the battery monomer 12 in the other, and it is beneficial to further reduce the risk of thermal runaway spreading of the battery monomer 12, thereby further improving the reliability of the battery 100.

[0140] According to some embodiments of the present application, referring to FIGS. 4-6, in the second direction Y, the pressure relief mechanisms 125 of two adjacent battery monomers 12 in the second battery module 15 are staggered with each other.

[0141] The pressure relief mechanisms 125 of two adjacent battery monomers 12 in the second battery module 15 are staggered, which means that when one of the battery monomers 12 is in thermal runaway, the risk of high-temperature and high-pressure emissions triggering the pressure relief mechanisms 125 of the adjacent battery monomers 12 is reduced, and to some extent, the risk of the battery monomer 12 in thermal runaway causing the adjacent battery monomer 12 to also be in thermal runaway is reduced.

[0142] In some embodiments, referring to FIG. 4, the pressure relief mechanisms 125 are arranged offset from the geometric center of the wall of the battery monomer 12, which can also be referred to as pressure relief mechanism 125 offset. By changing the installation direction of two adjacent battery monomers 12, the pressure relief mechanisms 125 of the two adjacent battery monomers 12 are staggered. Of course, in other embodiments, the pressure relief mechanisms 125 of each battery monomer 12 can be arranged at different positions to stagger the pressure relief mechanisms 125 of two adjacent battery monomers 12, and the battery monomers 12 themselves can also be staggered to stagger the pressure relief mechanisms 125. For example, referring to FIG. 9, the positions of the pressure relief mechanisms 125 of the battery monomers 12 are arranged in an upper-middle-lower cycle, but the pressure relief mechanisms 125 of two adjacent battery monomers 12 are also staggered.

[0143] In the above scheme, the risk of one of the two adjacent battery monomers 12 in the second battery module 15 being in thermal runaway causing the other to also be in thermal runaway is reduced, and the reliability of the battery 100 is improved.

[0144] According to some embodiments of the present application, referring to FIGS. 4-8, the isolation component 13 has a first surface 132 facing the first battery module 14. The first surface 132 is provided with a plurality of first through holes 134, and the first through holes 134 are in communication with the collection cavity 131. The pressure relief mechanisms 125 of the first battery module 14 are arranged corresponding to the first through holes 134.

[0145] The first through holes 134 can correspond to a plurality of pressure relief mechanisms 125 of the first battery module 14, or can only correspond to one pressure relief mechanism 125 of the first battery module 14. For example, in some embodiments, the first through holes 134 are provided in plurality, and the first battery module 14 includes a plurality of battery monomers 12, and the first through holes 134 correspond one-to-one to the pressure relief mechanisms 125 of the plurality of battery monomers 12 in the first battery module 14.

[0146] In some embodiments, the first through holes 134 can be arranged on the wall of the collection cavity 131, that is, the first surface 132 is the outer surface of one of the walls of the collection cavity 131.

[0147] In the first direction X, at least part of the projection of the pressure relief mechanism 125 is located within the first through hole 134. For example, in some embodiments, at least part of the pressure relief mechanism 125 can protrude from the outer surface of the wall portion of the outer shell 121 of the battery cell 12 and extend into the first through hole 134.

[0148] In the above scheme, the provision of the first through hole 134 can cause the discharge of the thermal runaway battery cell 12 to enter the collection cavity 131 from the first through hole 134, which can guide the discharge of the battery cell 12 in the first battery module 14 when the battery cell 12 is in thermal runaway, thereby reducing the risk of random flow of the discharge and improving the reliability of the battery 100. In addition, by guiding the discharge in the manner of providing the first through hole 134, there is no need to provide an additional flow guide channel, which is conducive to improving the energy density of the battery 100.

[0149] According to some embodiments of the present application, referring to FIGS. 5 and 10, the first battery module 14 includes a plurality of first battery cells 141 and a plurality of second battery cells 142, and the first battery cells 141 and the second battery cells 142 are arranged alternately along a second direction Y perpendicular to the first direction X. The side of the first battery cell 141 facing the isolation component 13 is provided with a first pressure relief mechanism 1411, and the side of the second battery cell 142 facing the isolation component 13 is provided with a second pressure relief mechanism 1421, and the first pressure relief mechanism 1411 and the second pressure relief mechanism 1421 are staggered with each other.

[0150] Referring to FIG. 10, since the first pressure relief mechanism 1411 and the second pressure relief mechanism 1421 are both offset, it is only necessary to make the assembly direction of the first battery cell 141 and the second battery cell 142 opposite in the third direction Z. In some embodiments, since the positive electrode terminal and the negative electrode terminal of the first battery cell 141 are both arranged on the wall portion opposite to the first pressure relief mechanism 1411 of the first battery cell 141 in the first direction X, and the positive electrode terminal and the negative electrode terminal of the second battery cell 142 are both arranged on the wall portion opposite to the second pressure relief mechanism 1421 of the second battery cell 142 in the first direction X, when the first battery cell 141 and the second battery cell 142 are connected in series, the busbar component 16 such as a tab can extend along the second direction Y, without extending along the direction intersecting the second direction Y. Such an arrangement, under the premise of regular outer contour of the first battery module 14, reduces the arrangement difficulty of the busbar component 16, simplifies the assembly process, and at the same time, the risk of interference between two adjacent busbar components 16 in the third direction Z is relatively low, the arrangement difficulty of the busbar component 16 is relatively low, and the manufacturing cost of the battery 100 is relatively low.

[0151] In the above scheme, by staggering the first pressure relief mechanism 1411 and the second pressure relief mechanism 1421 of the first battery monomer 141 and the second battery monomer 142 arranged alternately, the pressure relief mechanisms 125 of two adjacent battery monomers 12 of the first battery module 14 are staggered, and the assembly of the first battery module 14 can be completed by only changing the assembly direction of the first battery monomer 141 and the second battery monomer 142, which is low in assembly efficiency and cost, and the manufacturing cost of the battery 100 is also relatively low.

[0152] According to some embodiments of the present application, referring to FIGS. 5, 7 and 8, the plurality of first through holes 134 are arranged in two rows, one row of first through holes 134 corresponding to the plurality of first pressure relief mechanisms 1411, and the other row of first through holes 134 corresponding to the plurality of second pressure relief mechanisms 1421.

[0153] Referring to FIG. 8, the first through holes 134 are arranged in two rows, and the positioning of the first battery monomer 141 and the second battery monomer 142 can be completed when the first pressure relief mechanism 1411, the second pressure relief mechanism 1421 and the first through hole 134 are positioned, which facilitates the assembly and detection of the assembly position of the first battery module 14.

[0154] In the above scheme, the first through holes 134 arranged in rows can serve as the assembly reference of the first battery monomer 141 and the second battery monomer 142, facilitating the pre-positioning of the first battery monomer 141 and the second battery monomer 142, and being conducive to reducing the assembly difficulty of the first battery module 14.

[0155] According to some embodiments of the present application, referring to FIGS. 5, 7 and 8, the first surface 132 is provided with two first blocking pieces 135, the two first blocking pieces 135 are arranged at intervals along the third direction Z, the plurality of first through holes 134 are located between the two first blocking pieces 135, the first blocking piece 135 extends along the second direction Y, and the second direction Y, the first direction X and the third direction Z are perpendicular to each other.

[0156] The material of the first blocking piece 135 can include rubber, plastic, metal, etc.

[0157] The first blocking piece 135 can be arranged on the first surface 132 by welding or bonding, or can be integrally formed with the isolation component 13.

[0158] In the above scheme, since the plurality of first through holes 134 are located between the two first blocking pieces 135, the two first blocking pieces 135 can reduce the risk that the discharge of the battery monomer 12 caused by foreign matter blocking part of the first through hole 134 cannot flow into the collection cavity 131 in time, thereby causing the remaining battery monomers 12 to also be in thermal runaway.

[0159] According to some embodiments of the present application, referring to FIG. 5, FIG. 7 and FIG. 8, the first surface 132 is provided with a first glue, and the first glue is located on a side of the first barrier 135 away from the plurality of first through holes 134 in the third direction Z, and the first battery module 14 is connected to the first surface 132 through the first glue.

[0160] In the process of setting the first glue on the first surface 132, due to the setting of the first barrier 135, it is more difficult for the first glue to flow to the first through hole 134, that is, it is more difficult for the first glue to block part of the first through hole 134.

[0161] In the above scheme, the setting of the first glue and the first barrier 135 not only can make the first battery module 14 and the isolation component 13 have higher connection strength, but also can reduce the risk that the exhaust of the battery cell 12 blocked by the first glue from part of the first through hole 134 cannot flow into the collection cavity 131 in time, thereby causing the remaining battery cells 12 to also have thermal runaway.

[0162] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 13 and FIG. 14, the battery 100 further comprises a first one-way valve 136, and the first one-way valve 136 is arranged at the first through hole 134.

[0163] The first one-way valve 136 can be arranged at the first through hole 134 through a fastener, or can be bonded to the first through hole 134.

[0164] The setting of the first one-way valve 136 at the first through hole 134 means that if the battery cell 12 of the second battery module 15 has thermal runaway, the exhaust thereof will not flow from the first through hole 134 to the surrounding of the first battery module 14, thereby further improving the reliability of the battery 100.

[0165] In the above scheme, the setting of the first one-way valve 136 can reduce the risk that the exhaust of the battery cell 12 of the second battery module 15 having thermal runaway flows out of the collection cavity 131 and causes the battery cell 12 of the first battery module 14 to also have thermal runaway, which is beneficial to further reduce the risk of the spread of thermal runaway of the battery cell 12, thereby being beneficial to further improve the reliability of the battery 100.

[0166] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 13 and FIG. 14, the first one-way valve 136 comprises a first valve 1360, an edge of the first valve 1360 covers the first through hole 134, and a middle part of the first valve 1360 forms a necked part 1361 protruding away from the first battery module 14.

[0167] The first valve 1360 can be formed by injection molding.

[0168] The first valve 1360 has a lower weight than a mechanical one-way valve, which is conducive to improving the mass energy density of the battery 100.

[0169] In some embodiments, referring to FIG. 13 and FIG. 14, the first valve 1360 has two openings, a larger one is bonded at the first through hole 134 and a smaller one is located in the collection cavity 131.

[0170] In the above scheme, the one-way valve is formed by the first valve 1360 and the notch portion 1361 arranged on the first valve 1360, which is conducive to saving the space occupied by the one-way valve in the battery 100, improving the energy density of the battery 100, and reducing the assembly cost of the battery 100.

[0171] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 8 and FIG. 12, the isolation component 13 has a second surface 133 facing the second battery module 15. The second surface 133 is provided with a plurality of second through holes 137, which are in communication with the collection cavity 131, and the pressure relief mechanism 125 of the second battery module 15 is arranged correspondingly to the second through hole 137.

[0172] The second through hole 137 can correspond to a plurality of pressure relief mechanisms 125 of the second battery module 15, or only correspond to one of the pressure relief mechanisms 125 of the second battery module 15. For example, in some embodiments, the second through hole 137 is provided with a plurality of second through holes, the second battery module 15 includes a plurality of battery monomers 12, and the second through hole 137 corresponds to the pressure relief mechanism 125 of each of the plurality of battery monomers 12 in the second battery module 15.

[0173] In some embodiments, the second through hole 137 can be arranged on the wall of the collection cavity 131, that is, the second surface 133 is the outer surface of one of the walls of the collection cavity 131.

[0174] In the first direction X, at least part of the projection of the pressure relief mechanism 125 is located in the second through hole 137. For example, in some embodiments, at least part of the pressure relief mechanism 125 can protrude from the outer surface of the wall of the shell 121 of the battery monomer 12 and extend into the second through hole 137.

[0175] In some embodiments, referring to FIG. 8 and FIG. 15, the isolation component 13 has a first surface 132 facing the first battery module 14. The first surface 132 is provided with a plurality of first through holes 134, the first through holes 134 being in communication with the collection cavity 131, and the pressure relief mechanism 125 of the first battery module 14 being provided corresponding to the first through holes 134. The third battery cell 151 is provided opposite to the first battery cell 141 along the first direction X, and the second battery cell 142 is provided opposite to the fourth battery cell 152 along the first direction X. Along the second direction Y, the second through holes 137 and the first through holes 134 are linearly and alternately arranged, and the collection cavity 131 includes a first collection cavity 131 and a second collection cavity 131, which are spaced apart along the third direction Z. The first through holes 134 corresponding to the first pressure relief mechanism 1411 and the second through holes 137 corresponding to the fourth pressure relief mechanism 1521 are in communication with the first collection cavity 131, and the second through holes 137 corresponding to the second pressure relief mechanism 1421 and the third through holes corresponding to the third pressure relief mechanism 1511 are in communication with the second collection cavity 131. That is, the battery cells 12 of the first battery module 14 and the second battery module 15 are staggered along the first direction X and the second direction Y.

[0176] In the above scheme, the arrangement of the second through holes 137 can make the discharge of the battery cell 12 in thermal runaway enter the collection cavity 131 through the second through holes, guide the discharge of the battery cell 12 in the second battery module 15 when the battery cell 12 is in thermal runaway, and reduce the risk of random flow of the discharge, thereby improving the reliability of the battery 100. In addition, by guiding the discharge through the arrangement of the second through holes 137, it is not necessary to arrange an additional flow guide channel, thereby improving the energy density of the battery 100.

[0177] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 8 and FIG. 12, the second battery module 15 includes a plurality of third battery cells 151 and a plurality of fourth battery cells 152, the third battery cells 151 and the fourth battery cells 152 being alternately arranged along the second direction Y perpendicular to the first direction X. The side of the third battery cell 151 facing the isolation component 13 is provided with a third pressure relief mechanism 1511, and the side of the fourth battery cell 152 facing the isolation component 13 is provided with a fourth pressure relief mechanism 1521, the third pressure relief mechanism 1511 and the fourth pressure relief mechanism 1521 being staggered with each other.

[0178] The third pressure relief mechanism 1511 and the fourth pressure relief mechanism 1521 can be staggered by reversing the assembly direction of the first battery cell 141 and the second battery cell 142 in the third direction Z. In some embodiments, since the positive electrode terminal and the negative electrode terminal of the third battery cell 151 are arranged on the wall opposite to the wall on which the third pressure relief mechanism 1511 of the third battery cell 151 is arranged in the first direction X, and the positive electrode terminal and the negative electrode terminal of the fourth battery cell 152 are arranged on the wall opposite to the wall on which the fourth pressure relief mechanism 1521 of the fourth battery cell 152 is arranged in the first direction X, when the third battery cell 151 and the fourth battery cell 152 are connected in series, the busbar 16, for example, the tab, can extend along the second direction Y without extending in the direction intersecting the second direction Y. With such an arrangement, the busbar 16 can be arranged with less difficulty under the premise of regular outer contour of the second battery module 15, the assembly process is simplified, and the risk of interference between two busbars 16 adjacent in the third direction Z is lower. The busbar 16 is relatively easy to arrange, and the manufacturing cost of the battery 100 is relatively low.

[0179] In the above scheme, by staggering the third pressure relief mechanism 1511 and the fourth pressure relief mechanism 1521 of the third battery cell 151 and the fourth battery cell 152 arranged alternately, the pressure relief mechanisms 125 of two adjacent battery cells 12 of the second battery module 15 are staggered. The assembly of the second battery module 15 can be completed by only changing the assembly direction of the third battery cell 151 and the fourth battery cell 152, the assembly efficiency and cost are lower, and the manufacturing cost of the battery 100 is relatively low.

[0180] According to some embodiments of the present application, please refer to FIG. 5, FIG. 7, FIG. 8 and FIG. 12, the plurality of second through holes 137 are arranged in two rows, one row of second through holes 137 corresponds to the plurality of third pressure relief mechanisms 1511, and the other row of second through holes 137 corresponds to the plurality of fourth pressure relief mechanisms 1521.

[0181] Please refer to FIG. 8, the second through holes 137 are arranged in two rows, the positioning of the third battery cell 151 and the fourth battery cell 152 can be completed when the third pressure relief mechanism 1511, the fourth pressure relief mechanism 1521 and the second through hole 137 are positioned, and the assembly and the assembly position of the second battery module 15 can be conveniently detected.

[0182] In the above scheme, the second through holes 137 arranged in rows can be used as the assembly reference of the third battery cell 151 and the fourth battery cell 152, which can facilitate the pre-positioning of the third battery cell 151 and the fourth battery cell 152, and is conducive to reducing the assembly difficulty of the fourth battery module.

[0183] According to some embodiments of the present application, referring to FIG. 5 and FIG. 8, the second surface 133 is provided with two second barriers 138, the two second barriers 138 are spaced apart along the third direction Z, and the plurality of second through holes 137 are located between the two second barriers 138, the second barriers 138 extend along the second direction Y, and the second direction Y, the first direction X and the third direction Z are perpendicular to each other in pairs.

[0184] The material of the second barrier 138 can include rubber, plastic, metal, etc.

[0185] The second barrier 138 can be arranged on the second surface 133 by welding or bonding, or can be integrally formed with the isolation component 13.

[0186] In the above scheme, since the plurality of second through holes 137 are located between the two second barriers 138, the two second barriers 138 can reduce the risk that the exhaust of the battery monomer 12 in thermal runaway cannot flow into the collection cavity 131 in time due to the second barrier 138 blocking part of the second through hole 137, thereby triggering the remaining battery monomer 12 to also be in thermal runaway.

[0187] According to some embodiments of the present application, referring to FIG. 5 and FIG. 8, the second surface 133 is provided with a second adhesive, along the third direction Z, the second adhesive is located on the side of the second barrier 138 away from the plurality of second through holes 137, and the second battery module 15 is connected to the second surface 133 through the second adhesive.

[0188] In the process of arranging the second adhesive on the second surface 133, due to the arrangement of the second barrier 138, it is more difficult for the second adhesive to flow to the second through hole 137, that is, it is more difficult for the second adhesive to block part of the second through hole 137.

[0189] In the above scheme, the arrangement of the second adhesive and the second barrier 138 not only can make the second battery module 15 and the isolation component 13 have higher connection strength, but also can reduce the risk that the exhaust of the battery monomer 12 in thermal runaway cannot flow into the collection cavity 131 in time due to the second adhesive blocking part of the second through hole 137, thereby triggering the remaining battery monomer 12 to also be in thermal runaway.

[0190] According to some embodiments of the present application, referring to FIG. 5, FIG. 12-FIG. 14, the battery 100 further comprises a second one-way valve 139, and the second through hole 137 is provided with the second one-way valve 139.

[0191] The second one-way valve 139 can be arranged at the second through hole 137 by a fastener, or can be bonded to the second through hole 137.

[0192] The second one-way valve 139 arranged at the second through hole 137 means that if the battery cell 12 of the first battery module 14 is in thermal runaway, the discharge of the battery cell 12 will not flow into the first battery module 14 through the second through hole 137, thereby further improving the reliability of the battery 100.

[0193] In some embodiments, the second one-way valve 139 includes a second valve leaflet, an edge of the second valve leaflet is connected to the isolation component 13, and a middle part of the second valve leaflet forms a second necked part protruding away from the second battery module 15.

[0194] In the above scheme, the arrangement of the second one-way valve 139 can reduce the risk that the discharge of the battery cell 12 in thermal runaway in the first battery module 14 flows out of the collection cavity 131 and triggers the battery cell 12 in the second battery module 15 to also be in thermal runaway, which is conducive to further reducing the risk of the spread of the battery cell 12 in thermal runaway, thereby further improving the reliability of the battery 100.

[0195] According to some embodiments of the present application, please refer to FIG. 11 and FIG. 12, the first battery module 14 and the second battery module 15 are both connected to the isolation component 13, and the isolation component 13 is used to bear the first battery module 14 and the second battery module 15.

[0196] In some embodiments, the battery cell 12 of the first battery module 14 and the battery cell 12 of the second battery module 15 can be connected to the isolation component 13 through a colloid and a fastener.

[0197] The isolation component 13 is used to bear the first battery module 14 and the second battery module 15, which means that two components for fixing the first battery module 14 and the second battery module 15 are not needed, which is conducive to improving the energy density of the battery 100.

[0198] In the above scheme, the first battery module 14 and the second battery module 15 are both borne by the isolation component 13, which can improve the energy density of the battery 100 while the battery 100 has high structural strength.

[0199] According to some embodiments of the present application, please refer to FIG. 5, FIG. 7 and FIG. 8, the inside of the isolation component 13 is formed with a first flow channel 1310 for containing a heat exchange medium.

[0200] The inside of the isolation component 13 is formed with the first flow channel 1310 for containing the heat exchange medium, which means that the first flow channel 1310 will not occupy additional space inside the battery 100.

[0201] The first flow channel 1310 can be formed together in the process of extrusion molding of the isolation component 13, or can be formed by machining after the isolation component 13 is processed.

[0202] The heat exchange medium is generally a fluid for regulating the temperature of the battery cells 12, which can be a liquid or a gas, and the temperature regulation means heating or cooling the battery cells 12. In the case of cooling or lowering the temperature of the battery cells 12, the heat exchange medium can also be referred to as a cooling medium or a cooling fluid, and more specifically, a cooling liquid or a cooling gas. In addition, the heat exchange medium can also warm up the battery cells 12. Optionally, the fluid can be circulated to achieve better temperature regulation. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc.

[0203] In the above scheme, the first flow channel 1310 does not occupy additional space inside the battery 100, and the first flow channel 1310 can simultaneously exchange heat with the battery cells 12 in the first battery module 14 and the battery cells 12 in the second battery module 15, which is conducive to improving the reliability and energy density of the battery 100.

[0204] According to some embodiments of the present application, referring to FIGS. 5, 7 and 8, the first flow channel 1310 and the collection cavity 131 have a shared wall portion.

[0205] The first flow channel 1310 and the collection cavity 131 have a shared wall portion, which means that after the exhaust flows into the collection cavity 131, the heat exchange medium can exchange heat with the exhaust through the shared wall portion.

[0206] In the above scheme, the first flow channel 1310 can not only exchange heat with the battery cells 12 under normal working conditions, but also exchange heat with the exhaust when the battery cells 12 are in thermal runaway, which reduces the risk of thermal runaway spreading and improves the reliability of the battery 100.

[0207] According to some embodiments of the present application, referring to FIGS. 5, 12 and 15, the battery 100 further includes a box 11, and the first battery module 14, the second battery module 15 and the isolation component 13 are all arranged in the box 11.

[0208] The material of the box 11 can include copper, iron, aluminum, steel, aluminum alloy, plastic, etc.

[0209] In some embodiments, the box 11 can have an opening surface, after the second battery module 15 is assembled to the isolation component 13, the opening surface is arranged together in the box 11 and connected to the wall portion of the box 11, and then the first battery module 14 is installed and the opening surface is closed.

[0210] In the above scheme, the box 11 can isolate the external environment, reduce the risk of foreign matter contacting the battery cells 12 in the first battery module 14 and the battery cells 12 in the second battery module 15 causing thermal runaway of the battery cells 12, and is conducive to improving the reliability of the battery 100.

[0211] According to some embodiments of the present application, referring to FIG. 5, FIG. 12 and FIG. 15, the isolation component 13 divides the box 11 into a first chamber and a second chamber, the first battery module 14 is accommodated in the first chamber, and the second battery module 15 is accommodated in the second chamber.

[0212] In some embodiments, the first chamber and the second chamber are sealed and isolated.

[0213] In the above scheme, the isolation component 13 divides the box 11 into a first chamber and a second chamber, which can predefine the assembly space of the first battery module 14 and the second battery module 15, and the isolation component 13 serves as an assembly reference, which is beneficial to simplify the assembly process, facilitate the automatic assembly of the battery 100, improve the assembly efficiency of the battery 100, and also beneficial to simplify the maintenance process of the first battery module 14 and the second battery module 15, and reduce the maintenance cost.

[0214] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 12 and FIG. 15, the box 11 further includes a first side wall 116 and a second side wall 117 arranged oppositely along a third direction Z, and the isolation component 13 connects the first side wall 116 and the second side wall 117, and the third direction Z, the second direction Y and the first direction X are perpendicular to each other.

[0215] The first side wall 116 and the second side wall 117 can serve as the wall of the box 11, or can be located inside the box 11.

[0216] In the above scheme, the first side wall 116 and the second side wall 117 can simultaneously limit the assembly position of the first battery module 14 and the second battery module 15 in the third direction Z, which is beneficial to simplify the assembly process and improve the assembly efficiency.

[0217] According to some embodiments of the present application, referring to FIG. 5, FIG. 7, FIG. 12 and FIG. 15, the first side wall 116, the second side wall 117 and the isolation component 13 are integrally formed; or, the first side wall 116 and the isolation component 13 are welded, and the second side wall 117 and the isolation component 13 are welded.

[0218] In some embodiments, the first side wall 116, the second side wall 117 and the isolation component 13 can be integrally formed by an extrusion process. In some embodiments, the first side wall 116 and the isolation component 13 can be connected by friction stir welding, and the second side wall 117 and the isolation component 13 can be connected by friction stir welding.

[0219] In the above scheme, the first side wall 116, the second side wall 117 and the isolation component 13 are integrally formed, so that the first side wall 116, the second side wall 117 and the isolation component 13 have high connection strength, and the structural stability of the battery 100 is improved; the first side wall 116 and the second side wall 117 are connected to the isolation component 13 by welding, so that the manufacturing cost of the battery 100 is reduced.

[0220] According to some embodiments of the present application, referring to FIGS. 5, 12 and 15, the box 11 further comprises a first cover 113 and a second cover 114, the first cover 113 is connected to the first side wall 116 and the second side wall 117. The second cover 114 is connected to the first side wall 116 and the second side wall 117. Along the first direction X, the second cover 114 is arranged opposite to the first cover 113, the isolation component 13 is located between the first cover 113 and the second cover 114, the first battery module 14 is located between the first cover 113 and the isolation component 13, and the second battery module 15 is located between the second cover 114 and the isolation component 13.

[0221] The first cover 113 and the second cover 114 can be connected to the first side wall 116 and the second side wall 117 by welding, bonding, fastener connection or the like.

[0222] The first cover 113 and / or the second cover 114 can be detachable to realize assembly and maintenance of the first battery module 14 and the second battery module 15.

[0223] In the above scheme, the first cover 113 and the second cover 114 are arranged, so that the assembly efficiency is improved and the maintenance cost is reduced.

[0224] According to some embodiments of the present application, referring to FIGS. 5, 12 and 15, the box 11 further comprises a first end wall 115 and a second end wall 120, the first end wall 115 and the second end wall 120 are arranged at intervals along the second direction Y, the isolation component 13 is located between the first end wall 115 and the second end wall 120, two ends of the first end wall 115 are connected to the first side wall 116 and the second side wall 117 respectively, and two ends of the second end wall 120 are connected to the first side wall 116 and the second side wall 117 respectively. The first cover 113 is further connected to the first end wall 115 and the second end wall 120, and the second cover 114 is further connected to the first end wall 115 and the second end wall 120.

[0225] The first cover 113 and the second cover 114 can be connected to the first end wall 115 and the second end wall 120 by welding, bonding, fastener connection or the like.

[0226] In some embodiments, the outer surfaces of the first end wall 115, the second end wall 120, the first side wall 116 and the second side wall 117 are the outer surfaces of the box 11. In some embodiments, the outer surfaces of the first end wall 115, the second end wall 120, the first side wall 116 and the second side wall 117 are the outer surfaces of the box 11.

[0227] In the above scheme, the box body 11 can be opened or closed only by the first cover 113 and the second cover 114, the assembly efficiency is high, and the maintenance cost is low.

[0228] According to some embodiments of the present application, referring to FIGS. 5, 7 and 12, the first battery modules 14 are provided in plurality. The battery 100 further comprises a first partition beam 118, which is arranged on the isolation component 13 and located between two adjacent first battery modules 14.

[0229] The first partition beam 118 can be connected to the isolation component 13 by welding, bonding, fastener connection or the like. It can also be integrally formed with the isolation component 13.

[0230] The first partition beam 118 can include at least one first segment and at least one second segment, the extension direction of the first segment intersects with the extension direction of the second segment. For example, referring to FIG. 5, the first partition beam 118 includes a first segment extending along the second direction Y and a second segment extending along the second direction Y, the two ends of the first segment are connected to the first end wall 115 and the second end wall 120 respectively, the two ends of the second segment are connected to the first side wall 116 and the second side wall 117 respectively, the first partition beam 118 is in a cross shape, and one side of the isolation component 13 is divided into four mounting areas, each of which can mount one first battery module 14.

[0231] In the above scheme, the first partition beam 118 is arranged on one side of the isolation component 13, which can divide the side of the isolation component 13 into a plurality of assembly areas, which is beneficial to realize the positioning of the plurality of first battery modules 14, simplify the assembly process and improve the assembly efficiency, and is also beneficial to improve the bending strength of the isolation component 13.

[0232] According to some embodiments of the present application, referring to FIGS. 5, 7 and 12, the second battery modules 15 are provided in plurality. The battery 100 further comprises a second partition beam 119, which is arranged on the isolation component 13 and located between two adjacent second battery modules 15.

[0233] The second partition beam 119 can be connected to the isolation component 13 by welding, bonding, fastener connection or the like. It can also be integrally formed with the isolation component 13.

[0234] The second partition beam 119 can include at least one first segment and at least one second segment, the extension direction of the first segment intersects with the extension direction of the second segment, for example, referring to FIG. 5, the second partition beam 119 includes a first segment extending along the second direction Y and a second segment extending along the second direction Y, two ends of the first segment are connected with the first end wall 115 and the second end wall 120 respectively, two ends of the second segment are connected with the first side wall 116 and the second side wall 117 respectively, the first partition beam 118 is in a cross shape, and one side of the isolation component 13 is divided into four installation areas, and one second battery module 15 can be installed in each installation area.

[0235] In the above scheme, the second partition beam 119 is arranged on one side of the isolation component 13, which can divide the one side of the isolation component 13 into a plurality of assembly areas, which is beneficial to realize the positioning of the plurality of second battery modules 15, simplify the assembly process, and improve the assembly efficiency, and is also beneficial to improve the bending strength of the isolation component 13.

[0236] According to some embodiments of the present application, the first direction X is parallel to the direction of gravity.

[0237] According to some embodiments of the present application, referring to FIG. 1, the present application provides a power consumption device, which includes the battery 100 in one or more embodiments described above, and the battery 100 is used to provide electric energy.

[0238] In the above scheme, since the battery 100 in one or more embodiments described above has high reliability, the power consumption device including the battery 100 in one or more embodiments described above also has high reliability.

[0239] According to some embodiments of the present application, referring to FIGS. 4-8 and FIGS. 10-15, the present application provides a battery 100, which includes a first battery module 14, a second battery module 15, an isolation component 13 and a box 11, the first battery module 14, the second battery module 15 and the isolation component 13 are arranged in the box 11. The isolation component 13 divides the box 11 into a first chamber and a second chamber, the first battery module 14 is accommodated in the first chamber, and the second battery module 15 is accommodated in the second chamber.

[0240] The box body 11 further comprises a first side wall 116 and a second side wall 117 oppositely arranged along a third direction Z, a first end wall 115 and a second end wall 120, and a first cover 113 and a second cover 114. The isolation component 13 is connected to the first side wall 116 and the second side wall 117, and the first side wall 116, the second side wall 117 and the isolation component 13 are integrally formed. The first cover 113 is connected to the first side wall 116 and the second side wall 117. The second cover 114 is connected to the first side wall 116 and the second side wall 117. Along the first direction X, the second cover 114 is oppositely arranged with the first cover 113, the isolation component 13 is located between the first cover 113 and the second cover 114, the first battery module 14 is located between the first cover 113 and the isolation component 13, and the second battery module 15 is located between the second cover 114 and the isolation component 13.

[0241] The first end wall 115 and the second end wall 120 are arranged at intervals along the second direction Y, and the isolation component 13 is located between the first end wall 115 and the second end wall 120. The two ends of the first end wall 115 are connected to the first side wall 116 and the second side wall 117 respectively, and the two ends of the second end wall 120 are connected to the first side wall 116 and the second side wall 117 respectively. The third direction Z, the second direction Y and the first direction X are perpendicular to each other. The first cover 113 is further connected to the first end wall 115 and the second end wall 120, and the second cover 114 is further connected to the first end wall 115 and the second end wall 120.

[0242] The first battery module 14 and the second battery module 15 are both connected to the isolation component 13, and the isolation component 13 is used to carry the first battery module 14 and the second battery module 15. The first battery module 14 and the second battery module 15 are arranged in layers along the first direction X. The inside of the isolation component 13 has a collection cavity 131 for collecting the discharge of the battery cell 12 when the pressure relief mechanism 125 is actuated. The inside of the isolation component 13 forms a first flow channel 1310 for containing a heat exchange medium. The first flow channel 1310 and the collection cavity 131 have a common wall portion. The isolation component 13 not only can be used as a base for carrying the first battery module 14 and the second battery module 15, but also can be used as a heat management component of the first battery module 14 and the second battery module 15, and can further include the collection cavity 131 of the discharge of the battery cell 12 in thermal runaway.

[0243] The first battery module 14 includes a plurality of first battery cells 141 and a plurality of second battery cells 142, the first battery cells 141 and the second battery cells 142 are arranged alternately along a second direction Y, the second direction Y is perpendicular to the first direction X. The side of the first battery cells 141 facing the isolation component 13 is provided with a first pressure relief mechanism 1411, the side of the second battery cells 142 facing the isolation component 13 is provided with a second pressure relief mechanism 1421, the first pressure relief mechanism 1411 and the second pressure relief mechanism 1421 are staggered with each other. The second battery module 15 includes a plurality of third battery cells 151 and a plurality of fourth battery cells 152, the third battery cells 151 and the fourth battery cells 152 are arranged alternately along the second direction Y, the second direction Y is perpendicular to the first direction X. The side of the third battery cells 151 facing the isolation component 13 is provided with a third pressure relief mechanism 1511, the side of the fourth battery cells 152 facing the isolation component 13 is provided with a fourth pressure relief mechanism 1521, the third pressure relief mechanism 1511 and the fourth pressure relief mechanism 1521 are staggered with each other.

[0244] The isolation component 13 has a first surface 132 facing the first battery module 14. The first surface 132 is provided with a plurality of first through holes 134, the first through holes 134 are in communication with the collection cavity 131, and the pressure relief mechanisms 125 of the first battery module 14 are arranged correspondingly with the first through holes 134. The plurality of first through holes 134 are arranged in two rows, one row of first through holes 134 corresponds to the plurality of first pressure relief mechanisms 1411, and the other row of first through holes 134 corresponds to the plurality of second pressure relief mechanisms 1421. The first surface 132 is provided with two first blocking pieces 135, the two first blocking pieces 135 are arranged at intervals along a third direction Z, the plurality of first through holes 134 are located between the two first blocking pieces 135, the first blocking pieces 135 extend along the second direction Y, and the second direction Y, the first direction X and the third direction Z are perpendicular to each other in pairs. The first surface 132 is provided with a first adhesive, along the third direction Z, the first adhesive is located on the side of the first blocking pieces 135 away from the plurality of first through holes 134, and the first battery module 14 is connected to the first surface 132 through the first adhesive. The battery 100 further includes a first one-way valve 136, the first one-way valve 136 is arranged at the first through hole 134.

[0245] The isolation component 13 has a second surface 133 facing the second battery module 15. The second surface 133 is provided with a plurality of second through holes 137, which are in communication with the collection cavity 131, and the second battery module 15 is provided with the pressure relief mechanism 125 corresponding to the second through holes 137. The plurality of second through holes 137 are arranged in two rows, one row of second through holes 137 corresponding to the plurality of third pressure relief mechanisms 1511, and the other row of second through holes 137 corresponding to the plurality of fourth pressure relief mechanisms 1521. The second surface 133 is provided with two second barriers 138, which are spaced apart along the third direction Z, and the plurality of second through holes 137 are located between the two second barriers 138. The second barriers 138 extend along the second direction Y, and the second direction Y, the first direction X and the third direction Z are perpendicular to each other. The second surface 133 is provided with a second adhesive, which is located on the side of the second barriers 138 away from the plurality of second through holes 137 along the third direction Z, and the second battery module 15 is connected to the second surface 133 through the second adhesive. The battery 100 further comprises a second one-way valve 139, which is arranged at the second through hole 137.

[0246] The first pressure relief mechanism 1411, the second pressure relief mechanism 1421, the third pressure relief mechanism 1511 and the fourth pressure relief mechanism 1521 are staggered with each other, which can significantly reduce the risk of triggering the remaining battery monomers 12 when the battery monomer 12 is in thermal runaway, and significantly improve the reliability of the battery 100.

[0247] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized by, The battery comprises: a first battery module comprising a plurality of battery cells stacked along a second direction; a separation component located at one side of the first battery module in a first direction; wherein one side of the battery cells in the first battery module facing the separation component is provided with a pressure relief mechanism, and the separation component has an internal collection cavity for collecting emissions of the battery cells when the pressure relief mechanism is actuated; in the second direction, the pressure relief mechanisms of two adjacent battery cells in the first battery module are staggered with each other, and the second direction intersects the first direction.

2. The battery of claim 1, wherein, The battery further comprises a second battery module, and the first battery module and the second battery module are arranged in layers along the first direction, and between the first battery module and the second battery module along the first direction. The second battery module comprises a plurality of battery cells stacked along the second direction, and one side of the battery cells in the second battery module facing the separation component is provided with a pressure relief mechanism.

3. The battery of claim 2, wherein, In the first direction, the projection of the pressure relief mechanism of the first battery module and the projection of the pressure relief mechanism of the second battery module do not overlap.

4. The battery according to claim 2 or 3, characterized in that, In the second direction, the pressure relief mechanisms of two adjacent battery cells in the second battery module are staggered with each other.

5. The battery of claim 4, wherein, The separation component has a first surface facing the first battery module; The first surface is provided with a plurality of first through holes in communication with the collection cavity, and the pressure relief mechanism of the first battery module is correspondingly provided with the first through hole.

6. The battery of claim 5, wherein, The first battery module comprises a plurality of first battery cells and a plurality of second battery cells, and the first battery cells and the second battery cells are alternately arranged along the second direction; One side of the first battery cells facing the separation component is provided with a first pressure relief mechanism, and one side of the second battery cells facing the separation component is provided with a second pressure relief mechanism, and the first pressure relief mechanism and the second pressure relief mechanism are staggered with each other.

7. The battery of claim 6, wherein, The plurality of first through holes are arranged in two rows, one row of first through holes corresponds to a plurality of first pressure relief mechanisms, and the other row of first through holes corresponds to a plurality of second pressure relief mechanisms.

8. The battery according to claim 6 or 7, characterized in that The first surface is provided with two first barriers, and the two first barriers are spaced apart along a third direction, and a plurality of first through holes are located between the two first barriers, the first barriers extend along the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

9. The battery of claim 8, wherein, The first surface is provided with a first gel, and along the third direction, the first gel is located on the side of the first barrier away from the plurality of first through holes, and the first battery module is connected to the first surface through the first gel.

10. The battery of any one of claims 5-9, wherein, The battery further comprises a first one-way valve arranged at the first through hole.

11. The battery of claim 10, wherein, The first one-way valve comprises a first valve, and the edge of the first valve covers the first through hole, and the middle part of the first valve forms a necking part protruding away from the first battery module.

12. The battery of any one of claims 5-11, wherein, The separation component has a second surface facing the second battery module; The second surface is provided with a plurality of second through holes in communication with the collecting cavity, and a pressure relief mechanism of the second battery module is correspondingly arranged with the second through holes.

13. The battery of claim 12, wherein, The second battery module comprises a plurality of third battery monomers and a plurality of fourth battery monomers, and the third battery monomers and the fourth battery monomers are arranged alternately along the second direction. A side of the third battery monomer facing the isolation component is provided with a third pressure relief mechanism, and a side of the fourth battery monomer facing the isolation component is provided with a fourth pressure relief mechanism, and the third pressure relief mechanism and the fourth pressure relief mechanism are staggered with each other.

14. The battery of claim 13, wherein, The plurality of second through holes are arranged in two rows, one row of the second through holes corresponds to a plurality of the third pressure relief mechanisms, and the other row of the second through holes corresponds to a plurality of the fourth pressure relief mechanisms.

15. The battery according to claim 13 or 14, characterized in that The second surface is provided with two second barriers, the two second barriers are arranged at intervals along a third direction, and a plurality of the second through holes are located between the two second barriers, the second barriers extend along the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

16. The battery of claim 15, wherein, The second surface is provided with a second adhesive, and along the third direction, the second adhesive is located on a side of the second barrier away from the plurality of second through holes, and the second battery module is connected to the second surface through the second adhesive.

17. The battery of any one of claims 12-16, wherein, The battery further comprises a second one-way valve, and a second one-way valve is arranged at the second through hole.

18. The battery of any one of claims 2-17, wherein, The first battery module and the second battery module are both connected to the isolation component, and the isolation component is used for bearing the first battery module and the second battery module.

19. The battery of any one of claims 1-18, wherein, An internal part of the isolation component is formed with a first flow channel for containing a heat exchange medium.

20. The battery of claim 19, wherein, The first flow channel and the collecting cavity have a shared wall part.

21. The battery of any one of claims 2-20, wherein, The battery further comprises: A box body, the first battery module, the second battery module and the isolation component are all arranged in the box body.

22. The battery of claim 21, wherein, The isolation component divides the box body into a first chamber and a second chamber, the first battery module is accommodated in the first chamber, and the second battery module is accommodated in the second chamber.

23. The battery of claim 22, wherein, The box body further comprises a first side wall and a second side wall arranged oppositely along a third direction, the isolation component connects the first side wall and the second side wall, and the third direction, the second direction and the first direction are perpendicular to each other.

24. The battery of claim 23, wherein, The first side wall, the second side wall and the isolation component are integrally formed. Alternatively, the first side wall and the isolation component are welded, and the second side wall and the isolation component are welded.

25. The battery of claim 23 or 24, wherein, The box body further comprises: A first cover body connected to the first side wall and the second side wall; A second cover body connected to the first side wall and the second side wall; Along the first direction, the second cover body is arranged oppositely to the first cover body, the isolation component is located between the first cover body and the second cover body, the first battery module is located between the first cover body and the isolation component, and the second battery module is located between the second cover body and the isolation component.

26. The battery of claim 25, wherein, The box body further comprises: a first end wall and a second end wall, the first end wall and the second end wall being arranged spaced apart along the second direction, the isolation component being located between the first end wall and the second end wall, two ends of the first end wall being connected to the first side wall and the second side wall respectively, two ends of the second end wall being connected to the first side wall and the second side wall respectively; the first cover body is further connected to the first end wall and the second end wall, and the second cover body is further connected to the first end wall and the second end wall.

27. The battery of any one of claims 1-26, wherein, The first battery module is provided with a plurality of The battery further comprises: a first partition beam arranged on the isolation component and located between two adjacent first battery modules.

28. The battery of any one of claims 2-27, wherein, The second battery module is provided with a plurality of The battery further comprises: a second partition beam arranged on the isolation component and located between two adjacent second battery modules.

29. The battery of any one of claims 1-28, wherein, The first direction is parallel to the direction of gravity.

30. An electrical device, comprising: A battery as claimed in any one of claims 1-29, the battery being used to provide electrical energy.

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