CN216720146U

CN216720146U - Battery and electric equipment

Info

Publication number: CN216720146U
Application number: CN202220075746.9U
Authority: CN
Inventors: 曾智敏; 黄小腾; 唐彧; 杨海奇; 王鹏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-06-10
Anticipated expiration: 2032-01-12
Also published as: WO2023134479A1

Abstract

The embodiment of the application discloses a battery and electric equipment. The battery includes: a first tank portion having an open hollow structure; a plurality of battery cells accommodated in the hollow structure, wherein electrode terminals are disposed on first walls of the battery cells, and the first walls face first side walls of the first box body part; a plurality of bus members for electrically connecting electrode terminals of the plurality of battery cells; a first reinforcing plate disposed between adjacent first and second battery cells, the first reinforcing plate attached to a second wall of the first battery cell, the second wall intersecting the first wall of the first battery cell; the reinforcing block is provided with a first end face and a second end face which are oppositely arranged, the first end face abuts against the first reinforcing plate, and the second end face abuts against the first side wall, so that a gap is formed between the first side wall and the confluence part. The battery and the electric equipment of the embodiment of the application can improve the strength and the safety of the battery.

Description

Battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery and electric equipment.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry. Under such circumstances, electric vehicles are an important component of sustainable development of the automobile industry due to their energy saving and environmental protection advantages. In the case of electric vehicles, battery technology is an important factor in the development thereof.

In addition to improving the performance of batteries, safety issues are also a considerable problem in the development of battery technology. If the safety problem of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem to be solved urgently in the battery technology.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a battery and electric equipment, which can improve the strength and the safety of the battery.

In a first aspect, a battery is provided, the battery comprising: a first box portion having a hollow structure with an opening, the first box portion including a first sidewall adjacent the opening; the battery units are accommodated in the hollow structure, electrode terminals are arranged on first walls of the battery units, and the first walls are walls, facing the first side walls, of the battery units; a plurality of bus members for electrically connecting electrode terminals of the plurality of battery cells; a first reinforcing plate disposed between adjacent first and second battery cells of the plurality of battery cells, the first reinforcing plate being attached to a second wall of the first battery cell that intersects the first wall of the first battery cell; the reinforcing block is provided with a first end face and a second end face which are oppositely arranged, the first end face abuts against the first reinforcing plate, and the second end face abuts against the first side wall, so that a gap is formed between the first side wall and the confluence part.

Therefore, when the battery according to the embodiment of the application is extruded or collided, the force applied to the first side wall can directly act on the reinforcing block abutted to the first side wall, and the acting force is further transmitted to the first reinforcing plate through the reinforcing block, so that on one hand, the force applied to the first side wall cannot directly act on the first wall of the battery cell, the electrode terminal and the bus-bar component arranged on the first wall cannot be influenced, the thermal runaway of the battery cell is avoided, and the safety of the battery is improved; on the other hand, the strength of the box body of the battery is also improved, so that the box body of the battery is not easy to damage, and the safety of the battery is further improved.

In some embodiments, the first battery cell and the second battery cell are arranged in a first direction, the first reinforcing plate is perpendicular to the first direction, and the first direction is parallel to the first side wall and parallel to the bottom wall of the first case portion.

In this way, in the case where the first reinforcing plate is sandwiched between the first battery cell and the second battery cell and mounted in the first case portion, it is convenient to mount the reinforcing block through the opening of the first case portion.

In some embodiments, the electrode terminal of the first battery cell and the electrode terminal of the second battery cell are not connected by the bus bar member, so that there is sufficient space between the two battery cells to provide the reinforcing block, and the first end face of the reinforcing block may abut against the first reinforcing plate and the second end face abuts against the first side wall.

In some embodiments, the first end surface and the surface of the first reinforcing plate abutting against the first end surface are parallel to each other and are both inclined with respect to the first wall of the first battery cell, one side of the first end surface close to the opening is far away from the first side wall, and one side of the first end surface far away from the opening is close to the first side wall.

When the box body is installed, the reinforcing block can be inserted into the position between the first reinforcing block and the first side wall from the opening of the first box body part through the inclined first end face, and then the reinforcing block is tightly attached to the first side wall and the reinforcing block is tightly attached to the first reinforcing plate.

In some embodiments, the reinforcing block includes a first portion including the first end surface, and the first portion is disposed between the first battery cell and the second battery cell so that the first portion can be clamped between the first battery cell and the second battery cell, and the reinforcing block is relatively fixed in the first direction, thereby preventing the reinforcing block from shifting in the first direction.

In some embodiments, the reinforcing block includes a second portion connected to the first portion, the second portion being located between the first portion and the first sidewall, the second portion including the second end surface, a length of the second portion in a first direction being greater than a length of the first portion in the first direction, the first direction being an arrangement direction of the first battery cell and the second battery cell.

In this way, the length of the second portion in the first direction may be abutted against the first wall of the first battery cell or the first wall of the second battery cell compared to the excess portion of the first portion, so as to prevent the reinforcing block from shifting in the third direction perpendicular to the first side wall, and thus the reinforcing block is relatively fixed in the third direction.

In some embodiments, a third battery cell of the plurality of battery cells is aligned with the first battery cell in a second direction, a fourth battery cell of the plurality of battery cells is aligned with the second battery cell in the second direction, the second direction is perpendicular to the bottom wall of the first case portion, the third battery cell is adjacent to the fourth battery cell, and the third battery cell and the fourth battery cell are connected by the bus bar.

In some embodiments, a second reinforcing plate is sandwiched between the third battery cell and the fourth battery cell. The first reinforcing plate and the second reinforcing plate are arranged into two mutually independent parts, so that other parts arranged between the first single battery and the third single battery and between the second single battery and the fourth single battery can be avoided.

In some embodiments, the second portion includes an extension between the bus member and the first sidewall with a gap therebetween.

Because the same confluence component is arranged between the third battery cell and the fourth battery cell, the reinforcing block cannot be directly abutted against the second reinforcing plate, the second part of the reinforcing block can comprise an extension part, the extension part is inserted between the confluence component and the first side wall during installation, the extension part is abutted against the first side wall, and a gap is formed between the extension part and the confluence component, so that when the first side wall is extruded or collided, the extension part can enhance the strength of the first side wall, the gap between the extension part and the confluence component can prevent the first side wall from being extruded to the confluence component when being deformed, the safety of the confluence component is ensured, and the safety of the battery cells and the battery is improved.

In some embodiments, thermal management components are disposed between the first battery cell and the third battery cell, and between the second battery cell and the fourth battery cell, so as to adjust the temperature of the battery cells.

In some embodiments, a fifth battery cell of the plurality of battery cells and the first battery cell are arranged in a third direction, a sixth battery cell of the plurality of battery cells and the second battery cell are arranged in the third direction, the third direction is perpendicular to the first side wall, the first wall of the fifth battery cell and the first wall of the sixth battery cell face the second side wall of the first box portion, the second side wall and the first side wall are arranged opposite to each other, the first reinforcing plate is arranged between the first battery cell and the second battery cell and between the fifth battery cell and the sixth battery cell, and the reinforcing blocks are arranged at two ends of the first reinforcing plate in the third direction.

Be provided with same first reinforcing plate between first battery monomer and second battery monomer and between fifth battery monomer and sixth battery monomer, be provided with the boss between this first reinforcing plate and the first side wall, be provided with the boss between first reinforcing plate and the second side wall equally, so can be so that in the third direction, be provided with two bosses and first reinforcing plate between first side wall and the second side wall, the structural symmetry, the installation of being convenient for has also improved the intensity of battery, guarantee the security of two free first walls of battery on the third direction, and then the security of battery has been improved.

In some embodiments, the battery comprises: and the second box body part is used for covering the opening. The reinforcing block includes: and the third end surface is abutted against the second box body part so that the reinforcing block is relatively fixed in the second direction and is prevented from deviating in the second direction, and the second direction is perpendicular to the bottom wall of the first box body part.

In a second aspect, there is provided an electrical device comprising: a battery according to the first aspect or any embodiment of the first aspect.

In some embodiments, the powered device is a vehicle, a watercraft, or a spacecraft.

Drawings

FIG. 1 is a schematic illustration of a vehicle according to one embodiment of the present application;

FIG. 2 is an exploded view of a battery according to one embodiment of the present application;

FIG. 3 is a schematic diagram of a partially exploded structure of a battery according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of a battery according to one embodiment of the present application;

FIG. 5 is a schematic structural view of a reinforcing block of one embodiment of the present application;

fig. 6 is a schematic top view of a battery according to an embodiment of the present application.

In the drawings, the drawings are not necessarily to scale.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification 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 specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The "plurality" in the present application means two or more (including two), and similarly, "plural" means two or more (including two) and "plural" means two or more (including two).

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are also not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive pole piece, a negative pole piece and an isolating membrane. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece includes anodal mass flow body and anodal active substance layer, and anodal active substance layer coats in anodal mass flow body's surface, and the anodal mass flow body protrusion in the anodal mass flow body that has coated anodal active substance layer of uncoated anodal active substance layer, and the anodal mass flow body that does not coat anodal active substance layer is as anodal utmost point ear. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece comprises a negative pole current collector and a negative pole active substance layer, wherein the negative pole active substance layer is coated on the surface of the negative pole current collector, the negative pole current collector which is not coated with the negative pole active substance layer protrudes out of the negative pole current collector which is coated with the negative pole active substance layer, and the negative pole current collector which is not coated with the negative pole active substance layer is used as a negative pole lug. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be polypropylene (PP) or Polyethylene (PE). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

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

For example, in the use process of the battery, the side surfaces of the battery are easily squeezed or collided, and then the side walls of the box body of the battery are crushed, at this time, the internal battery cells are stressed, and particularly, when the walls where the electrode terminals of the battery cells are located face the crushed side walls of the box body, the electrode terminals and the bus members connected with the electrode terminals may be squeezed or collided, and then the battery cells are thermally out of control due to collision, and then the battery is exploded.

Therefore, the embodiment of the application provides a battery, a plurality of battery cells are arranged in a box body of the battery, electrode terminals are arranged on first walls of the battery cells, and the first walls are arranged towards a first side wall of the box body; the battery further includes a plurality of bus members for connecting electrode terminals of the plurality of battery cells; the battery further includes a first reinforcing plate disposed between adjacent first and second ones of the plurality of battery cells, the first reinforcing plate attached to a second wall of the first battery cell that intersects the first wall of the first battery cell; the battery also includes a reinforcing block having oppositely disposed first and second end faces. The first end face of the reinforcing block abuts against the first reinforcing plate, and the second end face of the reinforcing block abuts against the first side wall, so that a gap is formed between the first side wall and the bus-bar component, therefore, when the battery is extruded or collided, the force applied to the first side wall can directly act on the reinforcing block abutted against the first side wall, and the acting force is further transmitted to the first reinforcing plate through the reinforcing block, on one hand, the force applied to the first side wall can not directly act on the first wall of the battery cell, the electrode terminal and the bus-bar component arranged on the first wall can not be influenced, the battery cell is prevented from thermal runaway, and the safety of the battery is improved; on the other hand, the strength of the box body of the battery is also improved, so that the box body of the battery is not easy to damage, and the safety of the battery is further improved.

The technical scheme described in the embodiment of the application is suitable for various electric equipment using batteries.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

For convenience of explanation, the following embodiments will be described by taking an electric device as an example of a vehicle.

For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present disclosure, the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 1 may be provided with a motor 40, a controller 30 and a battery 10, the controller 30 being configured to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may be used as an operation power supply of the vehicle 1 for a circuit system of the vehicle 1, for example, for power demand for operation at the start, navigation, and running of the vehicle 1. In another embodiment of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 1.

Fig. 2 is a schematic diagram showing a structure of a battery 10 according to an embodiment of the present application, and as shown in fig. 2, the battery 10 according to the embodiment of the present application includes: a plurality of battery cells 20 and a case 11. The interior of the case 11 is a hollow structure, and the plurality of battery cells 20 are accommodated in the case 11. Fig. 2 shows a possible implementation of the box body 11 of the embodiment of the present application, and as shown in fig. 2, the box body 11 may include two parts, which are referred to as a first box body part 111 and a second box body part 112, respectively, and the first box body part 111 and the second box body part 112 are buckled together. The shape of the first and second case portions 111 and 112 may be determined according to the shape of the battery cell 20 assembly, and at least one of the first and second case portions 111 and 112 has one opening. For example, as shown in fig. 2, only one of the first tank portion 111 and the second tank portion 112 may be a hollow rectangular parallelepiped having an opening, and the other may be plate-shaped to cover the opening. For example, taking the first case portion 111 as a hollow rectangular parallelepiped and having an opening 1113, and the second case portion 112 as a plate, the second case portion 112 covers the opening 1113 of the first case portion 111 to form the case 11 having a closed chamber, which can be used for accommodating a plurality of battery cells 20. The plurality of battery cells 20 are connected in parallel or in series-parallel combination and then placed in the case 11 formed by fastening the first case portion 111 and the second case portion 112.

For another example, unlike fig. 2, each of the first casing portion 111 and the second casing portion 112 may be a hollow rectangular parallelepiped, one surface of each of the first casing portion 111 and the second casing portion 112 may be an open surface, the opening of the first casing portion 111 and the opening of the second casing portion 112 may be disposed to face each other, and the first casing portion 111 and the second casing portion 112 may be engaged with each other to form the casing 11 having a closed chamber.

The number of the battery cells 20 in the battery 10 may be set to any number according to different power requirements. A plurality of battery cells 20 may be connected in series, parallel, or series-parallel to achieve greater capacity or power. Since the number of the battery cells 20 included in each battery 10 may be large, the battery cells 20 may also be arranged in groups for convenience of installation, each group of the battery cells 20 constituting a battery module. The number of the battery cells 20 included in the battery module is not limited and may be set as required. The battery may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel.

Optionally, the battery 10 may also include other structures, which are not described in detail herein. For example, the battery 10 may further include a bus member 12, and the bus member 12 is used to electrically connect a plurality of battery cells 20, such as in parallel or in series-parallel. Specifically, the bus member 12 may achieve electrical connection between the battery cells 20 by connecting the electrode terminals 211 of the battery cells 20. Further, the bus bar member 12 may be fixed to the electrode terminals 211 of the battery cells 20 by welding. The electric energy of the plurality of battery cells 20 can be further led out through the case 11 by the conductive mechanism.

The battery 10 according to the embodiment of the present application will be described in detail below with reference to the drawings. Fig. 3 shows a partially exploded schematic view of the battery 10 according to the embodiment of the present application. As shown in fig. 2 to 3, the battery 10 according to the embodiment of the present application specifically includes: a first tank portion 111, the first tank portion 111 being a hollow structure having an opening 1113, the first tank portion 111 including a first sidewall 1111 adjacent to the opening 1113; a plurality of battery cells 20 accommodated in the hollow structure, wherein a first wall 21 of each battery cell 20 is provided with an electrode terminal 211, and the first wall 21 is a wall of the battery cell 20 facing the first side wall 1111; a plurality of bus members 12 for electrically connecting electrode terminals 211 of the plurality of battery cells 20; a first reinforcing plate 131 disposed between a first battery cell 201 and a second battery cell 202 adjacent to each other among the plurality of battery cells 20, the first reinforcing plate 131 being attached to a second wall 22 of the first battery cell 201, the second wall 22 intersecting with a first wall 21 of the first battery cell 201; the reinforcing block 14 has a first end face 141 and a second end face 142 opposite to each other, the first end face 141 abuts against the first reinforcing plate 131, and the second end face 142 abuts against the first side wall 1111, so that a gap is formed between the first side wall 1111 and the bus member 12.

Therefore, the battery 10 of the embodiment of the present application is provided with the first reinforcing plate 131 and the reinforcing block 14, the first end face 141 of the reinforcing block 14 abuts against the first reinforcing plate 131, the second end face 142 abuts against the first side wall 1111, so that a gap is formed between the first side wall 1111 and the bus bar member 12, when the battery 10 is pressed or collided, the force applied to the first side wall 1111 directly acts on the reinforcing block 14 abutting against the first side wall 1111, and the acting force is further transmitted to the first reinforcing plate 131 through the reinforcing block 14, on one hand, the force applied to the first side wall 1111 does not directly act on the first wall 21 of the battery cell 20, for example, the force applied to the first side wall 1111 does not directly act on the first wall 21 of the first battery cell 201 and the first wall 21 of the second battery cell 201, and the electrode terminal 211 and the bus bar member 12 provided on the first wall 21 are not affected, the thermal runaway of the battery monomer 20 is avoided, and the safety of the battery 10 is improved; on the other hand, the strength of the case 11 of the battery 10 is also improved, so that the case 11 of the battery 10 is not easily damaged, and the safety of the battery 10 is further improved.

It should be understood that the battery cell 20 in the embodiment of the present application may have any polyhedral structure, the first wall 21 of the battery cell 20 may be any one wall of the battery cell 20, and the electrode terminal 211 is disposed on the first wall 21. For example, the battery cell 20 may have a hexahedral structure, and the first wall 21 may be a wall having the smallest or largest area of the battery cell 20. For another example, as shown in fig. 2 to 3, the battery cell 20 is a rectangular parallelepiped, the first wall 21 may be any wall of the battery cell 20, and the first wall 21 is the wall with the smallest area of the battery cell 20 in the drawings, but the embodiment of the present application is not limited thereto.

It should be understood that the electrode terminal 211 of the battery cell 20 according to the embodiment of the present application may be used to achieve electrical connection between a plurality of electrode cells 20. Specifically, the battery cell 20 may include an electrode assembly including a tab and a main portion, wherein the tab of the electrode assembly may include a positive electrode tab and a negative electrode tab, the positive electrode tab may be formed by laminating a portion of the positive electrode sheet on which the positive electrode active material layer is not coated, the negative electrode tab may be formed by laminating a portion of the negative electrode sheet on which the negative electrode active material layer is not coated, and the main portion may be formed by laminating a portion of the positive electrode sheet on which the positive electrode active material layer is coated and a portion of the negative electrode sheet on which the negative electrode active material layer is coated or winding the same. The electrode terminal 211 is used to be electrically connected with the electrode assembly to output electric power of the battery cell. The electrode terminals 211 of each battery cell 20 may include a positive electrode terminal for electrical connection with a positive tab and a negative electrode terminal for electrical connection with a negative tab. The anode electrode terminal and the anode tab can be directly connected or indirectly connected, and the cathode electrode terminal and the cathode tab can be directly connected or indirectly connected. Illustratively, the positive electrode terminal is electrically connected to the positive tab through a connecting member, and the negative electrode terminal is electrically connected to the negative tab through a connecting member.

Optionally, a pressure relief mechanism 212 may be further disposed on the first wall 21 of the battery cell 20, and the pressure relief mechanism 212 is a component for relieving the pressure inside the battery cell 20. Specifically, when the pressure or temperature inside the battery cell 20 reaches a threshold value, the pressure relief mechanism 212 is actuated to relieve the pressure inside the battery cell 20. For example, the pressure relief structure 212 may be provided with a score groove, and when the pressure or temperature inside the battery cell 20 reaches a threshold value, the pressure relief structure 212 is broken along the score groove, so as to release the internal pressure.

As used herein, "activate" means that the pressure relief mechanism 212 acts such that the internal pressure and temperature of the battery cell 20 are relieved. The actions generated by the pressure relief mechanism 212 may include, but are not limited to: at least a portion of the pressure relief mechanism 212 ruptures, is torn or melts, and so forth. After the pressure relief mechanism 212 is activated, the high-temperature and high-pressure substances inside the battery cell 20 are discharged as an exhaust from the pressure relief mechanism 212. In this way, the battery cell 20 can be vented under controlled pressure or temperature, thereby avoiding potentially more serious accidents.

Emissions from the battery cell 20 as referred to in this application include, but are not limited to: electrolyte, dissolved or split positive and negative pole pieces, fragments of a separation film, high-temperature and high-pressure gas generated by reaction, flame and the like.

The predetermined threshold may be adjusted according to design requirements. For example, the predetermined threshold may depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte, and the separator in the battery cell 20. The pressure relief mechanism 212 may be implemented, for example, as a pressure-sensitive or temperature-sensitive element or component, i.e., when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism 212 is actuated, thereby forming a channel through which the internal pressure or temperature can be relieved.

The pressure relief mechanism 212 on the cell 20 has a significant impact on the safety of the battery 10. For example, when the battery cell 20 is short-circuited or overcharged, thermal runaway may occur inside the battery cell 20, and the pressure or temperature may suddenly rise. In this case, the internal pressure and temperature can be released outward by the actuation of the pressure release mechanism 212, so as to prevent the explosion and the fire of the battery cell 20, thereby ensuring the safety of the battery 10. Therefore, in the case where the pressure relief mechanism 212 is provided in the first wall 21, since the first wall 21 is provided toward the first side wall 1111 of the case 11, when the first side wall 1111 is pressed or collided, the reinforcing block 14 can prevent the force received by the first side wall 1111 from being directly applied to the first wall 21, thereby preventing the electrode terminal 211 and the bus bar member 12 provided in the first wall 21 from being pressed and collided, and also preventing the pressure relief mechanism 212 from being deformed by the pressing and collision, thereby preventing the pressure relief mechanism 212 from being prematurely failed, and further improving the safety of the battery 10.

In the embodiment of the present application, the battery 10 may include a plurality of battery cells 20, and the plurality of battery cells 20 may be arranged in an array to increase the energy density of the battery 10. For example, as shown in fig. 2 to 3, the plurality of battery cells 20 may include a plurality of battery cells 20 arranged in a first direction X, which may be parallel to the first side wall 1111 and parallel to the bottom wall of the first case portion 111. For another example, the plurality of battery cells 20 may also include a plurality of battery cells 20 arranged along a second direction Z perpendicular to the bottom wall of the first case portion 111. For another example, the plurality of battery cells 20 may also include a plurality of battery cells 20 arranged along a third direction Y, which is perpendicular to the first sidewall 1111. The first direction X, the second direction Z and the third direction Y are mutually perpendicular.

It should be understood that the first battery cell 201 and the second battery cell 202 in the embodiment of the present application may be any two adjacent battery cells 20. For example, as shown in fig. 2 and 3, the first battery cell 201 and the second battery cell 202 are arranged in the first direction X, and the first reinforcing plate 131 is perpendicular to the first direction X, which is parallel to the first side wall 1111 and parallel to the bottom wall of the first case portion 111. That is, the first battery cell 201 and the second battery cell 202 are any two adjacent battery cells 20 in the plurality of battery cells 20 arranged in the first direction X, and when at least 3 battery cells 20 are arranged in the first direction X, the first reinforcing plate 131 may be disposed between any two adjacent battery cells 20, which is not limited in this embodiment of the present invention.

Wherein, the first reinforcing plate 131 perpendicular to the first direction X may refer to: the plane of the surface of the first reinforcing plate 131 with the largest area is perpendicular to the first direction, that is, the plane of the surface of the first reinforcing plate 131 with the largest area is perpendicular to the bottom wall and the first side wall 1111 of the first case portion 111, and meanwhile, the second wall 22 of the first battery cell 201 and the second wall of the second battery cell 202 attached to the first reinforcing plate 131 are also perpendicular to the bottom wall and the first side wall 1111 of the first case portion 111. In this way, when the first reinforcing plate 131 is sandwiched between the first battery cell 201 and the second battery cell 202 and mounted in the first casing portion 111, the reinforcing block 14 is easily mounted through the opening 1113.

Fig. 4 is a partially enlarged view of the battery 10 according to the embodiment of the present application, and specifically, fig. 4 is an enlarged view of a region a in fig. 2. As shown in fig. 4, the electrode terminal 211 of the first battery cell 201 and the electrode terminal 211 of the second battery cell 202 are not connected to each other by the bus member 12. Specifically, in consideration of the fact that the plurality of battery cells 20 need to be electrically connected to each other through the bus bar member 12, if the first battery cell 201 and the second battery cell 202 are not connected to each other through the same bus bar member 12, there is enough space between the two battery cells 20 to dispose the reinforcing block 14, so that the first end face 141 of the reinforcing block 14 abuts against the first reinforcing plate 131, and the second end face 142 abuts against the first side wall 1111.

In the embodiment of the present application, the first end face 141 and the surface of the first reinforcing plate 131 abutting the first end face 141 are parallel to each other and are both inclined with respect to the first wall 21 of the first battery cell 201, one side of the first end face 141 close to the opening 1113 is away from the first side wall 1111, and one side of the first end face 141 away from the opening 1113 is close to the first side wall 1111. Specifically, fig. 5 shows a schematic view of the reinforcing block 14 of the embodiment of the present application, as shown in fig. 2 to 5, the first end face 141 of the reinforcing block 14 abuts against the first reinforcing plate 131, and the surface of the first reinforcing plate 131 abutting against the first end face 141 and the first end face 141 are parallel to each other, so that the two can be tightly attached; and, the first end face 141 is obliquely disposed, and when it is installed, the reinforcing block 14 can be inserted between the first reinforcing block 131 and the first side wall 1111 through the oblique first end face 141, thereby achieving the tight attachment between the reinforcing block 14 and the first side wall 1111 and the tight attachment between the reinforcing block 14 and the first reinforcing plate 131.

As shown in fig. 2 to 5, the reinforcing block 14 includes a first portion 144, the first portion 144 includes a first end surface 141, and the first portion 144 is disposed between the first battery cell 201 and the second battery cell 202, so that the first portion 144 can be clamped between the first battery cell 201 and the second battery cell 202, so that the reinforcing block 14 is relatively fixed in the first direction X, and the reinforcing block 14 is prevented from being displaced in the first direction X.

As shown in fig. 2 to 5, the reinforcing block 14 includes a second portion 145 connected to the first portion 144, the second portion 145 is located between the first portion 144 and the first side wall 1111, the second portion 145 includes a second end surface 142, a length of the second portion 145 in the first direction X is greater than a length of the first portion 144 in the first direction X, the first direction X is an arrangement direction of the first battery cell 201 and the second battery cell 202, so that an excess portion of the second portion 145 in the length of the first direction X, compared to the first portion 144, may abut against the first wall 21 of the first battery cell 201 or the first wall 21 of the second battery cell 202, and the reinforcing block 14 is prevented from being displaced in a third direction Y perpendicular to the first side wall 1111, so that the reinforcing block 14 is relatively fixed in the third direction Y.

As shown in fig. 2 to 5, the reinforcing block 14 further includes: and a third end surface 143, where the third end surface 143 connects the first end surface 141 and the second end surface 142, and the third end surface 143 abuts against the second casing part 112, so that the reinforcing block 14 is relatively fixed in the second direction Z perpendicular to the bottom wall of the first casing part 111, and the deviation of the reinforcing block 14 in the second direction Z is avoided.

It should be understood that the first end face 141, the second end face 142 and the third end face 143 of the reinforcing block 14 respectively abut against different components, so that the reinforcing block 14 is relatively fixed with respect to the first direction X, the second direction Z and the third direction Y, and it is ensured that the reinforcing block 14 does not deviate in the use process of the battery 10, and it is also ensured that when the first side wall 1111 is extruded and collided, the received external force can be smoothly transmitted to the first reinforcing plate 131 through the reinforcing block 14, and the strength and the safety of the battery 10 are ensured.

As shown in fig. 2 to 5, a third battery cell 203 of the plurality of battery cells 20 is arranged with the first battery cell 201 along the second direction Z, a fourth battery cell 204 of the plurality of battery cells 20 is arranged with the second battery cell 202 along the second direction Z, the second direction Z is perpendicular to the bottom wall of the first box portion 111, the third battery cell 203 is adjacent to the fourth battery cell 204, and the third battery cell 203 and the fourth battery cell 204 are connected by the confluence part 12. When a plurality of bus members 12 are provided to connect a plurality of battery cells 20 as shown in the drawing, the electrical connection between the third battery cell 203 and the fourth battery cell 204 can be generally achieved by the same bus member 12.

Alternatively, as shown in fig. 2 to 5, a thermal management member 15 is disposed between the first battery cell 201 and the third battery cell 203, and between the second battery cell 202 and the fourth battery cell 204, so as to adjust the temperature of the battery cells 20, for example, the thermal management member 15 may contain a fluid to adjust the temperature of the plurality of battery cells 20. Here, the fluid may be a liquid or a gas, and adjusting the temperature may mean heating or cooling the plurality of battery cells 20. In the case of cooling or temperature reduction of the battery cells 20, the thermal management member 15 serves to contain a cooling fluid to reduce the temperature of the plurality of battery cells 20; in addition, the thermal management component 15 may also be used to heat the plurality of battery cells 20 to increase the temperature, which is not limited in the embodiment of the present application. Alternatively, the fluid may be circulated to achieve better temperature regulation. Alternatively, the fluid may be water, a mixture of water and glycol, air, or the like.

Optionally, other components may be further disposed on the thermal management component 15 according to the embodiment of the present application, for example, a structural adhesive may be further disposed on the surface of the thermal management component 15, so that when the battery cells 20 fixedly disposed on the surface of the thermal management component 15, especially when the walls of the plurality of battery cells 20 with the largest area face the thermal management component 15, the stability of the battery cells 10 can be greatly increased by the structural adhesive, and further, the strength and the stability of the battery 10 are improved. Alternatively, the thermal management member 15 may be replaced with another member, for example, the thermal management member 15 may be replaced with structural adhesive, and the present embodiment is not limited thereto.

As shown in fig. 2 to 5, the second reinforcing plate 132 is sandwiched between the third battery cell 203 and the fourth battery cell 204. When the thermal management member 15 is disposed between the first battery cell 201 and the third battery cell 203, and between the second battery cell 202 and the fourth battery cell 204, or other members are disposed, the first reinforcing plate 131 and the second reinforcing plate 132 are disposed as two independent members, and the thermal management member 15 or other members between the first battery cell 201 and the third battery cell 203, and between the second battery cell 202 and the fourth battery cell 204 can be avoided. When no other component is disposed between the first battery cell 201 and the third battery cell 203 and between the second battery cell 202 and the fourth battery cell 204, the first reinforcing plate 131 and the second reinforcing plate 132 may be disposed as two independent components, or may be disposed as the same reinforcing plate, that is, the second reinforcing plate 132 is the first reinforcing plate 131. The first reinforcing plate 131 and the second reinforcing plate 132 are provided as two independent parts, which can facilitate assembly, for example, the first battery cell 201, the second battery cell 202 and the clamped first reinforcing plate 131 can be relatively fixed, and in addition, the third battery cell 203, the fourth battery cell 204 and the clamped second reinforcing plate 132 can be relatively fixed, so that the structure is relatively simple; the first reinforcing plate 131 and the second reinforcing plate 132 are configured as the same reinforcing plate, so that the number of the reinforcing plates can be reduced, and the cost can be reduced.

As shown in fig. 2 to 5, the second portion 145 includes an extending portion 1451, the extending portion 1451 is located between the bus member 12 and the first sidewall 1111, and a gap is formed between the extending portion 1451 and the bus member 12. Since the same bus bar 12 is disposed between the third battery cell 203 and the fourth battery cell 204, the reinforcing block 14 cannot directly abut against the second reinforcing plate 132, and therefore, the second portion 145 of the reinforcing block 14 may include the extending portion 1451, when the reinforcing block is mounted, the extending portion 1451 is inserted between the bus bar 12 and the first sidewall 1111, the extending portion 1451 abuts against the first sidewall 111, and a gap is formed between the extending portion 1451 and the bus bar 12, so that when the first sidewall 1111 is pressed or collided, the extending portion 1451 may enhance the strength of the first sidewall 1111, and the gap between the extending portion 1451 and the bus bar 12 may prevent the first sidewall 1111 from being pressed against the bus bar 12 during deformation, thereby ensuring the safety of the bus bar 12 and improving the safety of the battery cells 20 and the battery 10.

Fig. 6 shows a schematic top view of the battery 10 according to the embodiment of the present application, and in particular, fig. 6 may be a schematic top view of the battery 10 shown in fig. 3 after being mounted. As shown in fig. 6, a fifth battery cell 205 of the plurality of battery cells 20 is arranged with the first battery cell 201 along the third direction Y, a sixth battery cell 206 of the plurality of battery cells 20 is arranged with the second battery cell 202 along the third direction Y, the third direction Y is perpendicular to the first side wall 1111, the first wall 21 of the fifth battery cell 205 and the first wall 21 of the sixth battery cell 206 face the second side wall 1112 of the first case portion 111, the second side wall is opposite to the first side wall 1111, the first reinforcing plate 131 is disposed between the first battery cell 201 and the second battery cell 202 and between the fifth battery cell 205 and the sixth battery cell 206, and reinforcing blocks 14 are disposed at both ends of the first reinforcing plate 131 along the third direction Y.

As shown in fig. 6, the first case portion 111 may have a first side wall 111 and a second side wall 1112 arranged oppositely, and, in the third direction Y, a plurality of rows of the battery cells 20 may be arranged, for example, two rows of the battery cells 20 may be arranged, wherein a fifth battery cell 205 in one row of the battery cells 20 is adjacent to a first battery cell 201 in another row of the battery cells 20, and a sixth battery cell 206 in one row of the battery cells 20 is adjacent to a second battery cell 202 in another row of the battery cells 20.

The first wall 21 of the first battery cell 201 and the first wall 21 of the second battery cell 202 face the first side wall 1111, the first reinforcing plate 131 is clamped between the second wall 22 of the first battery cell 201 and the second wall 22 of the second battery cell 202, and the reinforcing block 14 is arranged between the first reinforcing plate 131 and the first side wall 1111; the first wall 21 of the fifth battery cell 205 and the first wall 21 of the sixth battery cell 206 face the second side wall 1112, the first reinforcing plate 131 is also sandwiched between the second wall 22 of the fifth battery cell 205 and the second wall 22 of the sixth battery cell 206, and the reinforcing block 14 is also disposed between the first reinforcing plate 131 and the second side wall 11112. In this way, in the third direction Y, the two reinforcing blocks 14 and the first reinforcing plate 131 are arranged between the first side wall 1111 and the second side wall 1112, the structure is symmetrical, the installation is facilitated, the strength of the battery 10 is also improved, the safety of the first walls 21 of the two rows of single batteries 20 in the third direction Y is ensured, and the safety of the battery 10 is further improved.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A battery, comprising:

a first tank portion (111), the first tank portion (111) being a hollow structure having an opening (1113), the first tank portion (111) including a first sidewall (1111) adjacent to the opening (1113);

a plurality of battery cells (20) accommodated in the hollow structure, electrode terminals (211) being provided on first walls (21) of the battery cells (20), the first walls (21) being walls of the battery cells (20) facing the first side walls (1111);

a plurality of bus members (12) for electrically connecting electrode terminals (211) of the plurality of battery cells (20);

a first reinforcing plate (131) disposed between adjacent first and second battery cells (201, 202) of the plurality of battery cells (20), the first reinforcing plate (131) being attached to a second wall (22) of the first battery cell (201), the second wall (22) intersecting a first wall (21) of the first battery cell (201);

a reinforcing block (14), the reinforcing block (14) having a first end face (141) and a second end face (142) which are oppositely arranged, the first end face (141) abutting against the first reinforcing plate (131), the second end face (142) abutting against the first side wall (1111) so that a gap is formed between the first side wall (1111) and the bus bar member (12).

2. The battery according to claim 1, wherein the first battery cell (201) and the second battery cell (202) are aligned in a first direction, the first reinforcing plate (131) being perpendicular to the first direction, the first direction being parallel to the first side wall (1111) and to a bottom wall of the first case portion (111).

3. The battery according to claim 1 or 2, wherein the electrode terminal (211) of the first battery cell (201) and the electrode terminal (211) of the second battery cell (202) are not connected by a bus member (12).

4. The battery according to any one of claims 1 to 3, wherein the first end face (141) and a surface of the first reinforcing plate (131) abutting against the first end face (141) are parallel to each other and are each inclined with respect to the first wall (21) of the first battery cell (201), one side of the first end face (141) that is close to the opening (1113) is distant from the first side wall (1111), and one side of the first end face (141) that is distant from the opening (1113) is close to the first side wall (1111).

5. The battery of any of claims 1-4, characterized in that the reinforcement block (14) comprises a first portion (144), the first portion (144) comprising the first end face (141), the first portion (144) being disposed between the first battery cell (201) and the second battery cell (202).

6. The battery according to claim 5, wherein the reinforcing block (14) comprises a second portion (145) connected to the first portion (144), the second portion (145) being located between the first portion (144) and the first side wall (1111), the second portion (145) comprising the second end face (142), a length of the second portion (145) in a first direction being a direction in which the first battery cell (201) and the second battery cell (202) are arranged being greater than a length of the first portion (144) in the first direction.

7. The battery according to claim 6, wherein a third battery cell (203) of the plurality of battery cells (20) is aligned with the first battery cell (201) in a second direction, wherein a fourth battery cell (204) of the plurality of battery cells (20) is aligned with the second battery cell (202) in the second direction, wherein the second direction is perpendicular to the bottom wall of the first case portion (111), wherein the third battery cell (203) is adjacent to the fourth battery cell (204),

the third battery cell (203) and the fourth battery cell (204) are connected by the bus bar member (12).

8. The battery according to claim 7, wherein a second reinforcing plate (132) is sandwiched between the third battery cell (203) and the fourth battery cell (204).

9. The battery of claim 8, wherein the second portion (145) comprises an extension (1451), the extension (1451) is located between the bus member (12) and the first sidewall (1111), and the extension (1451) has a gap with the bus member (12).

10. The battery according to any one of claims 7 to 9, wherein a thermal management member (15) is provided between the first battery cell (201) and the third battery cell (203), and between the second battery cell (202) and the fourth battery cell (204).

11. The battery according to any of claims 1-10, characterized in that a fifth cell (205) of the plurality of cells (20) is aligned with the first cell (201) in a third direction, a sixth cell (206) of the plurality of cells (20) is aligned with the second cell (202) in the third direction, the third direction being perpendicular to the first sidewall (1111),

a first wall (21) of the fifth battery cell (205) and a first wall (21) of the sixth battery cell (206) are directed towards a second side wall (1112) of the first case portion (111), the second side wall being disposed opposite to the first side wall (1111),

the first reinforcing plate (131) is arranged between the first battery cell (201) and the second battery cell (202) and between the fifth battery cell (205) and the sixth battery cell (206), and reinforcing blocks (14) are arranged at two ends of the first reinforcing plate (131) along the third direction.

12. The battery according to any one of claims 1 to 11, characterized in that the battery comprises:

a second casing part (112) for covering the opening (1113);

the reinforcing block (14) comprises:

a third end surface (143), the third end surface (143) connecting the first end surface (141) and the second end surface (142), the third end surface (143) abutting against the second casing section (112).

13. An electrical device, comprising:

the battery of any one of claims 1 to 12, for providing electrical energy.