CN219303824U

CN219303824U - Battery and electric equipment

Info

Publication number: CN219303824U
Application number: CN202222800615.5U
Authority: CN
Inventors: 黄银成; 周严东; 沈圳; 刘琛; 朱婷婷
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-07-04
Anticipated expiration: 2032-10-24

Abstract

The application discloses a battery, which comprises a battery pack, a box body and a cover plate, wherein the battery pack is formed by stacking a plurality of battery cells, and end plates are respectively arranged at two ends along the stacking direction of the battery cells; the battery pack is arranged on the box body; the apron is located the top of group battery for cover the group battery, apron and end plate fixed connection. The method is used for solving the problem of service life reduction of the battery caused by expansion deformation of the battery monomer.

Description

Battery and electric equipment

Technical Field

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

Background

In recent years, the new energy field has been developed dramatically, and in the new energy field, batteries have been used as an energy source for an irreplaceable role, and the application of batteries has been wider. The service life of the battery is one of the general concerns of consumers.

In the actual use process of the battery, the battery monomer is in a frequent charge and discharge working condition and is influenced by charge and discharge and the structure of the battery monomer, so that the battery monomer can expand and deform, and particularly when a plurality of battery monomers are stacked to form a battery pack, the expansion along the stacking direction is superposed to cause larger deformation. And then lead to the whole deformation of battery, influence the structural strength of battery, lead to battery life decline.

Disclosure of Invention

In view of the above, the present application provides a battery and an electric device, which are used for solving the problem of reduced service life of the battery caused by expansion and deformation of a battery cell.

The first aspect of the application provides a battery, which comprises a battery pack, a box body and a cover plate, wherein the battery pack is formed by stacking a plurality of battery cells, end plates are respectively arranged at two ends along the stacking direction of the battery cells, and the stacking direction is perpendicular to the surface with the largest surface area of the battery cells; the battery pack is arranged on the box body; the apron is located the top of group battery for cover the group battery, apron and end plate fixed connection.

In this embodiment of the application, through installing the group battery in the box, the end plate and the apron fixed connection of group battery utilize end plate and box fixed simultaneously, thereby end plate and apron are fixed to have restricted the displacement of end plate, and then control battery monomer's expansion deformation. The problem of the reduction of battery life caused by the expansion and deformation of the battery cells is prevented. Meanwhile, the battery pack, the box body and the cover plate can be connected together in the fixing mode to form a whole, so that the structural strength of the battery is improved, and the service life of the battery is further prolonged.

According to some embodiments of the present application, the battery further comprises a fastener for fixedly connecting the end plate with the cover plate.

In the embodiment of the application, the cover plate and the end plate are connected through the fastener, so that the cover plate and the end plate are connected more reliably. Meanwhile, the assembly process of the fastener connection is simple, and the equipment and process cost can be saved. In addition, the fastener has the characteristics of standardization and various specifications, is easy to select, and is convenient to adapt to different battery products.

According to some embodiments of the application, the cover plate is provided with a first through hole, and the fastener is a threaded fastener, and the threaded fastener passes through the first through hole to be in threaded connection with the end plate.

In this application embodiment, set up first through-hole through the apron, use threaded fastener fastening connection apron and end plate, can utilize threaded fastener detachable characteristic to realize the dismantlement of apron, make things convenient for the maintenance of battery.

According to some embodiments of the present application, the threaded fastener includes a limiting portion and a rod portion that are connected, the limiting portion is abutted to one side of the cover plate far away from the end plate, and limits the cover plate, the rod portion has a first external thread, and the rod portion passes through the first through hole and is in threaded connection with the end plate.

In this application embodiment, when being in threaded connection with the end plate through threaded fastener's pole portion, spacing portion carries out spacingly with the apron, simple structure, and the simplification equipment step makes production more high-efficient.

According to some embodiments of the present application, the end plate is provided with a first threaded hole, the first threaded hole is disposed opposite to the first through hole, and the rod portion penetrates the first threaded hole and is fixedly connected with the first threaded hole.

Through set up first screw hole at the end plate, fasten the pole portion at the first screw hole of end plate, can make things convenient for threaded fastener's installation, make the assembly more efficient.

According to some embodiments of the application, the end plate is provided with a second through hole, the box is provided with a second threaded hole, the second through hole is arranged opposite to the first through hole and the second threaded hole, and the rod penetrates into the second through hole and the second threaded hole to be fixedly connected with the second threaded hole.

Through set up the second through-hole on the end plate in this application embodiment, the pole portion passes end plate with apron, end plate and box fastening connection as an organic whole, is favorable to improving the bulk strength of battery.

According to some embodiments of the application, the box body is provided with a mounting beam, the end plate is connected with the mounting beam, and the mounting beam is provided with a second threaded hole.

In this application embodiment, the end plate is installed on the installation roof beam, through the second screw hole fixed connection on threaded fastener and the installation roof beam, can restrict the displacement at both ends about the end plate, the single expansion deformation of control battery better.

According to some embodiments of the present application, the end plate is provided with a threaded rod having a second external thread, the threaded rod passing through the first through hole and being threadably connected to the threaded fastener.

In this application embodiment, set up the screw rod on the end plate, make things convenient for threaded fastener's installation, make assembly efficiency higher.

According to some embodiments of the present application, the threaded fastener includes a main body portion and a flange portion protruding from the main body portion, the main body portion is provided with a third threaded hole, the flange portion is located on one side of the cover plate away from the end plate for limiting the cover plate, and the screw is fixedly connected with the third threaded hole.

In this application embodiment, through set up flange portion on threaded fastener, on the one hand can spacing apron, on the other hand can increase in the area of contact of apron to improve threaded fastener and prevent that threaded fastener from loosening in the frictional force between the apron.

According to some embodiments of the present application, the battery further comprises a seal between the end plate and the cover plate for sealing the connection interface of the end plate and the cover plate.

In this application embodiment, place the elastic component between apron and the end plate, sealing connection interface can improve the IP protection level of battery to make the battery adapt to different operating modes.

According to some embodiments of the present application, the cover plate is provided with a reinforcement extending in the stacking direction of the battery cells.

In this application embodiment, set up the enhancement portion on the apron, can strengthen the intensity of apron to strengthen the upper cover and to the spacing of end plate, and then control battery monomer's inflation deformation.

According to some embodiments of the present application, the battery further comprises a side plate, wherein two ends of the side plate are fixedly connected with the end plates at two ends of the battery pack respectively, and the side plate is used for limiting displacement of the end plates at two ends of the battery pack.

In this application embodiment, through setting up the end plate at curb plate connection group battery both ends, can strengthen the spacing to the end plate, more be favorable to controlling the free expansion deformation of battery.

According to some embodiments of the present application, there is further provided a powered device, including the battery in the above embodiments, where the battery is configured to provide power for the powered device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a powered device according to some embodiments of the present application;

FIG. 2 is a schematic illustration of a battery according to some embodiments of the present application;

FIG. 3 is an exploded view of a battery according to some embodiments of the present application;

FIG. 4 is a top view of a battery according to some embodiments of the present application;

FIG. 5 is a schematic cross-sectional view of some embodiments of FIG. 3 taken along the A-A direction;

FIG. 6 is an enlarged view of region C of FIG. 4;

FIG. 7 is a top view of a battery according to some embodiments of the present application;

FIG. 8 is a schematic cross-sectional view of FIG. 6 taken along the direction A-A;

FIG. 9 is an enlarged view of region D of FIG. 7;

FIG. 10 is a schematic cross-sectional view of the other embodiment of FIG. 3 taken along the direction A-A;

FIG. 11 is an enlarged view of area E of FIG. 9;

the reference numerals are as follows:

vehicle 1000, battery 100, controller 200, motor 300

The battery cell 1, the battery pack 10, the end plate 2, the first screw hole 21, the screw 22, the second through hole 22, the cover plate 3, the first through hole 31, the reinforcing rib 32, the case 4, the second screw hole 41, the fastener 5, the threaded fastener 51, the limiting portion 511, the lever portion 512, the threaded fastener 52, the third screw hole 521, the flange portion 522, the seal 6, and the side plate 7.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

While the present 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 present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In order to solve the problem that the service life of the battery is reduced due to expansion deformation of the battery monomer, the inventor finds that the battery monomer needs to be limited in the expansion direction in the research process, so that the integral deformation of the battery caused by the expansion of the battery monomer is avoided. Based on this concept, end plates may be provided at both ends of the stacking direction of the battery cells, and high-strength side plates are added at both sides of the end plates to connect the end plates at both ends, thereby forming a battery pack, which is mounted to the case, and then the cover plate is mounted, thereby forming the battery. Deformation of the battery cells in the stacking direction is controlled by pulling force of the side plates to the end plates, however, due to high strength requirements on the side plates, the weight of the side plates is large, the overall weight of the battery is increased due to the plurality of side plates, the manufacturing cost of the battery is increased, and the energy density is reduced.

In order to solve the above-mentioned problems, an embodiment of the present application provides a battery, including a battery pack, a case, and a cover plate, where the battery pack is formed by stacking a plurality of battery cells, and end plates are respectively provided at both ends in a stacking direction of the battery cells; the battery pack is arranged on the box body; the apron is located the top of group battery for cover the group battery, apron and end plate fixed connection.

In this embodiment of the application, through installing the group battery in the box, the end plate and the apron fixed connection of group battery utilize end plate and box fixed simultaneously, thereby end plate and apron are fixed to have restricted the displacement of end plate, and then control battery monomer's expansion deformation. The problem of the reduction of battery life caused by the expansion and deformation of the battery cells is prevented. Meanwhile, the battery pack, the box body and the cover plate can be connected together in the fixing mode to form a whole, so that the structural strength of the battery is improved, and the service life of the battery is further prolonged. In addition, the end plate and the cover plate are fixed, so that parts of the side plate are omitted, the whole weight of the battery is reduced, and the energy density is improved.

The battery disclosed by the embodiment of the application can be used for electric equipment such as vehicles, ships or aircrafts, but is not limited to the electric equipment. The power supply system with the power utilization device formed by the box body and the battery disclosed by the application is beneficial to improving the protection effect on the battery, so that the potential safety hazard of the battery in the use process can be effectively reduced, and the use safety of the battery is improved.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

The embodiment of the application provides a battery, as shown in fig. 2 and 3, including a battery pack 10, a box 4 and a cover plate 3, wherein the battery pack 10 is formed by stacking a plurality of battery cells 1, two ends along the stacking direction of the battery cells 1 are respectively provided with end plates 2, and the stacking direction is perpendicular to the surface with the largest surface area of the battery cells 1; the battery pack 10 is mounted on the case 4; the cover plate 3 is located at the top of the battery pack 10 and is used for covering the battery pack 10, and the cover plate 3 is fixedly connected with the end plate 2.

The battery 100 includes a case 4, and a battery pack 10, a case 4, and a cover plate 3 accommodated in the case 4. The battery is arranged on electric equipment such as vehicles, containers, electric cabinets, brackets and the like through the box body 4, so that an electric system is formed. In the battery 100, the number of the battery cells 1 may be plural, and the plurality of battery cells 1 may be connected in series, parallel, or series-parallel, where series-parallel refers to both of the plurality of battery cells 1 being connected in series and parallel. The plurality of battery cells 1 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 1 is accommodated in the box body 4; of course, the battery 100 may also be a battery module form formed by connecting a plurality of battery cells 1 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole and be accommodated in the case 4. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 1.

The battery cell 1 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 embodiment of the present application. The battery cell 1 may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc., which is not limited in the embodiment of the present application. The battery cells 1 are generally divided into three types in a package manner: the cylindrical battery cell 1, the prismatic battery cell 1, and the pouch battery cell 1 are not limited thereto in this embodiment.

The box 4 is used for holding the battery monomer 1, and the box 4 forms the effect of bearing to the battery monomer 1, still forms certain guard action to the battery monomer 1. The mounting points can be arranged on the box body 4, and the battery can be mounted on electric equipment such as a vehicle, a container, an electric cabinet, a bracket and the like through the mounting points of the box body 4, so that an electric system is formed. The case 4 may have various structures such as a tray having a mounting plane for the battery cells 1, and a polygonal case. The box body 4 may be a metal plate punching box body 4, a section bar bending box body 4, a splice welding box body 4, a die casting box body 4, a plastic shell box body 4 or the like, which is not limited in this embodiment. The case 4 shown in fig. 2, 3 and 11 is manufactured by a profile welding process.

The cover 33 is adapted to be connected to the housing 4 to provide a certain level of IP protection to the battery. The battery using condition is complicated, if there is the foreign matter to get into box 4 and the contact of battery monomer 1 can lead to risks such as short circuit, explosion, and apron 3 is connected with box 4 can prevent that the foreign matter from getting into box 4, and then avoids taking place the incident. The cover plate 3 and the box body 4 can be directly connected through fasteners 5 such as bolts, and particulate matters such as dust can be prevented from entering the battery to a certain extent. Sealing gasket, rubber strip, sealant, foaming glue and the like can be arranged between the cover plate 3 and the box body 4 for sealing connection, so that small particle substances such as water are prevented from entering the battery. The cover plate 3 may be made of a metal material such as steel, aluminum, or the like, or may be made of a plastic, a composite material, or the like.

The battery pack 10 is formed by stacking a plurality of battery cells 1, and end plates 2 are provided at both ends in the stacking direction of the battery cells 1, respectively. The battery pack 10 may include one row of the battery cells 1 arranged in sequence in one direction, or may include a plurality of rows of the battery cells 1 arranged in one direction. The locations between the

battery cells

1 and 1 within the battery pack 10 may be fixed, which may be fixed by gluing, or by fixing with a frame or other structure to form one battery pack 10. The battery pack 10 is mounted in the case 4, and the battery pack 10 and the case 4 may be fixed in various manners, for example, by coating glue on the bottom of the case 4, so that the battery pack 10 and the case 4 are fixed by glue. The battery pack 10 may be fixed to the case 4 by fixing the case 4 to the end plate 2.

The end plates 2 are positioned at both ends along the stacking direction of the battery cells 1 and fixedly connected with the grouped battery cells 1, and meanwhile, the end plates 2 are connected with the cover plate 3. The end plates 2 may be used to form a fixing and pressing action for the assembled battery cells 1. Meanwhile, when the battery pack 10 needs to be moved, the end plate 2 can be connected and fixed with a fixture. The end plate 2 may be a plate-like structure member located at the end of the battery pack 10 or a bracket structure member constituting the frame of the battery pack 10. The end plate 2 may be made of a non-metallic material or a metallic material, wherein the end plate 2 made of a metallic material is at least partially connected with an insulating member.

The end plate 2 and the cover plate 3 are connected in various ways, and can be connected in a non-detachable way by welding, glue connection and the like. Or can be connected by a mode of convenient disassembly such as threaded fastener 51 connection, clamping connection and the like.

In this embodiment, through installing group battery 10 in box 4, the end plate 2 and the apron 3 fixed connection of group battery 10 simultaneously utilize end plate 2 to be fixed with box 4, thereby end plate 2 and apron 3 are fixed to have restricted the displacement of end plate 2, and then control the expansion deformation of battery monomer 1. The problem of the reduction of the battery life due to the swelling deformation of the battery cell 1 is prevented. Meanwhile, the battery pack 10, the box body 4 and the cover plate 3 can be connected together in the fixing mode to form a whole, so that the structural strength of the battery is improved, and the service life of the battery is further prolonged.

According to some embodiments of the present application, as shown in fig. 2-11, battery 100 further includes a fastener 5, fastener 5 being used to fixedly connect end plate 2 with cover plate 3.

The fastener 5 is used for connecting the end plate 2 and the cover plate 3, and the fastener 5 may be a bolt, a nut, a rivet, a self-tapping screw, a welding nail, a buckle, a self-piercing rivet, an FDS bolt, or the like, which can form a mechanical part for fastening two or more parts. The fastening member 5 may be a part attached to the cover plate 3 or the end plate 2 and integrated with the cover plate 3 or the end plate 2, for example, by providing a buckle on the cover plate 3, providing a clamping groove on the end plate 2, and the buckle is the fastening member 5, and fastening connection between the cover plate 3 and the end plate 2 is achieved by clamping the buckle into the clamping groove. The fastening member 5 may be a separate member from the cover plate 3 and the end plate 2, and may connect the cover plate 3 and the end plate 2 by, for example, rivets.

In the embodiment of the application, the cover plate 3 and the end plate 2 are connected by the fastener 5, so that the cover plate 3 and the end plate 2 can be connected more reliably. Meanwhile, the assembly process of the connection of the fastener 5 is simple, and equipment and process cost can be saved. In addition, the fastener 5 has the characteristics of standardization and various specifications, is easy to select, and is convenient to adapt to different battery products.

According to some embodiments of the present application, as shown in fig. 3-9, the cover plate 3 is provided with a first through hole 31, and the fastener 5 is a threaded fastener 51, which is screwed with the end plate through the first through hole.

The cover plate 3 is provided with a first through hole 31, and the first through hole 31 is required to prevent the limit portion 511 of the threaded fastener 51 from passing through the first through hole 31, and the stem portion 512 of the threaded fastener 51 can pass through the first through hole 31. The first through hole 31 may be a through hole in the shape of a round hole, a kidney hole, a special-shaped hole, or the like.

The threaded fastener 51 is a fastener having a thread, and the thread may be an external thread on the outer surface of the parent body or an internal thread on the inner surface of the parent body. The profile of the threads may be triangular, trapezoidal, rectangular, etc., and is not limited in this application.

In this application embodiment, set up first through-hole 31 through apron 3, use screw fastener 51 fastening connection apron 3 and end plate 2, can utilize screw fastener 51 detachable characteristic to realize the dismantlement of apron 3, make things convenient for the maintenance of battery.

According to some embodiments of the present application, the threaded fastener 51 includes a limiting portion 511 and a rod portion 512, where the limiting portion 511 is abutted to a side of the cover plate 3 away from the end plate 2, and limits the cover plate 3, the rod portion 512 has a first external thread, and the rod portion 512 passes through the first through hole 31 and is in threaded connection with the end plate 2.

The limiting portion 511 of the threaded fastener 51 is used to limit the cover plate, so that the rod portion 512 can pass through the first through hole, but the limiting portion cannot pass through the first through hole. The shape of the limiting part can be hexahedron, cylinder, octahedron and other shapes. The limiting part 511 can also have a structure of inner plum blossom, inner cross and the like which are convenient for screwing the sleeve. The shaft portion 512 of the threaded fastener 51 may be fully threaded, or may be partially externally threaded in the polished shaft portion 512. The threaded fastener 51 may be connected to the end plate 2 at the stem 512, or may be connected to the tank 4 or other structural member through at least a portion of the end plate 2, to achieve a secure connection of the cover plate 3 to the end plate 2.

According to some embodiments of the present application, as shown in fig. 4-6, the end plate 2 is provided with a first threaded hole 21 disposed opposite to the first through hole, and the shank 512 of the threaded fastener 51 penetrates the first threaded hole 21 and is fixedly connected with the first threaded hole 21.

The end plate 2 is provided with a first screw hole 21, and the first screw hole 21 is fastened and connected with the external screw of the rod portion 512 of the screw fastener 51, so that the cover plate 3 is fixed on the end plate 2. The first threaded hole 21 may be a blind hole or a through hole. The first threaded hole 21 may be a threaded hole machined in the body of the end plate 2, or may be a threaded hole carried by an implanted insert nut 52 or a welded nut 52.

By providing the first threaded hole 21 in the end plate 2 and fastening the shank 512 of the threaded fastener 51 into the first threaded hole 21 in the end plate 2, installation of the threaded fastener 51 can be facilitated and assembly can be made more efficient.

According to some embodiments of the present application, as shown in fig. 7-9, the end plate 2 is provided with a second through hole 22, the box 4 is provided with a second threaded hole 41, the second through hole 22 is opposite to the first through hole 31 and the second threaded hole 41, and the rod portion 512 of the threaded fastener 51 penetrates the second through hole 22 and the second threaded hole 41 and is fixedly connected with the second threaded hole 41.

The end plate 2 is provided with a second through hole 22, which may be a through hole penetrating the body of the end plate 2 or may be at least part of penetrating the end plate 2. As shown in fig. 9, the second through hole 22 penetrates the body of the end plate 2 and is fastened to a second screw hole 41 provided in the case 4.

Through set up the second through-hole 22 on end plate 2, threaded fastener 51 passes end plate 2 and fastens and connects apron 3, end plate 2 and box 4 as an organic whole, is favorable to improving the bulk strength of battery.

The mounting beams may be reinforcing ribs or welded beams protruding from the bottom of the case 4, and may be arranged transversely or longitudinally along the case 4. The end plate is installed on the installation roof beam, is connected with the installation roof beam. The end plate can be fixed on the mounting beam through a fastener, and can also be bonded on the mounting beam through glue, and the connection mode of the end plate and the mounting beam is not limited.

According to some embodiments of the present application, as shown in fig. 10 and 11, the end plate 2 is provided with a screw 22, the screw 22 having a second external thread, the screw 22 passing through the first through hole 31 and being threadedly coupled with a threaded fastener.

The end plate 2 is provided with a screw 22, the screw 22 protrudes out of the end plate 2 body towards the cover plate 3, and the screw 22 can be formed by machining the end plate 2 body or connecting the screw 22 or a bolt with the screw to the end plate 2 by embedding, clamping and the like. The screw 22 can be fixedly connected with the end plate 2, and can also be movably connected with the end plate 2 relatively. The screw 22 penetrates through the through hole of the cover plate 3 and is fastened and connected with the threaded fastener 51, so that the end plate 2 and the cover plate 3 are fixed. As shown in fig. 11, the screw 22 is formed by machining the body of the end plate 2, and the threaded fastener 512 is fastened to the screw 22 by sleeving the cover plate 3 onto the screw 22, so that the end plate 2 and the cover plate 3 are fixedly connected.

In the embodiment of the application, the screw 22 is arranged on the end plate 2, so that the installation of the fastener 5 is facilitated, and the assembly efficiency is higher.

The threaded fastener comprises a main body part and a flange part protruding out of the main body part, and the main body part is provided with a third threaded hole for being fixedly connected with the screw rod. The main body part can also be designed into a shape which is convenient to match with the sleeve, and is used for being connected with the sleeve, so that the threaded fastener is convenient to assemble and disassemble. The flange part protrudes out of the main body part, and the surface of the flange part can be provided with convex points, ribs and other lines which can increase friction force.

In this application embodiment, through set up main part portion and flange portion on threaded fastener, on the one hand can spacing apron, on the other hand can increase in the area of contact of apron to improve threaded fastener and prevent that threaded fastener from loosening in the frictional force between the apron.

According to some embodiments of the present application, as shown in fig. 3 and 9, the battery 100 further comprises a sealing member 6, the sealing member 6 being located between the end plate 2 and the cover plate 3 for sealing the connection interface of the end plate and the cover plate.

The sealing element 6 can be a structural member with certain rebound performance, such as a rubber strip, a silica gel sheet, foaming glue, a hollow adhesive tape, a solid adhesive tape, a sponge, and the like. The seal 6 may be a separate piece, for example as shown in fig. 3, the seal 6 being a silicone piece. The sealing member 6 may also be an integral part of the cover plate 3 and the end plate 2, for example, the sealing member 6 may be a foaming glue coated on the cover plate 3.

In this embodiment of the application, place sealing member 6 between apron 3 and end plate 2, can seal the interface of connection, improve the IP protection level of battery to make the battery adapt to different operating modes.

According to some embodiments of the present application, as shown in fig. 2 and 4, the cap plate 3 is provided with a reinforcement part 32, and the reinforcement part 32 extends in the stacking direction of the battery cells 1.

The reinforcing portion 32 may be a rib formed on the cover plate 3, or may be a reinforcing plate attached or welded to the cover plate 3. The extending direction of the reinforcement 32 is the stacking direction of the battery cells 1, and the strength of the cap plate 3 in this direction can be enhanced, preventing the cap plate 3 from being deformed in this direction.

In this embodiment, set up reinforcing part 32 on apron 3, can strengthen the intensity of apron 3 to strengthen the upper cover and to the spacing of end plate 2, and then control cell 1's expansion deformation.

According to some embodiments of the present application, as shown in fig. 3, the battery 100 further includes a side plate 7, and both ends of the side plate 7 are fixedly connected with the end plates 2 at both ends of the battery pack 10, respectively, for limiting displacement of the end plates 2 at both ends of the battery pack 10.

The curb plate 7 is located the both sides of group battery 10, and the both ends of curb plate 7 are used for connecting the end plate 2 that is located the group battery 10 both ends, and the connection mode of curb plate 7 and end plate 2 can be modes such as welding, fastener 5 connection, joint, cementing, and this application does not limit. The side plate 7 may be made of a nonmetallic material or a metallic material.

In this embodiment of the application, through setting up the end plate 2 that curb plate 7 connect group battery 10 both ends, can strengthen the spacing to end plate 2, more be favorable to controlling the expansion deformation of battery cell 1.

The electric equipment can be, but is not limited to, an electric car, a ship, a spacecraft, an energy storage bin and the like.

According to some embodiments of the present application, as shown in fig. 3, 7, 8, 9, the battery pack 10 includes a plurality of battery cells 1 stacked in the thickness direction and the width direction, and end plates 2 located at both ends in the thickness direction. The end plate 2 is provided with a through second through hole 22, the box 4 is provided with a second threaded hole 41, glue is coated on the bottom of the box 4, the battery pack 10 is bonded in the box 4 through the glue, two sides along the width direction of the battery pack 10 are provided with side plates 7, and the side plates 7 are connected with the end plate 2 through buckles. A cover plate 3 is positioned at the upper end of the case 4 to cover the battery pack 10. The cover plate 3 is provided with a first through hole 31, a sealing piece 6 is arranged between the cover plate 3 and the end plate 2, a limiting part 511 of a threaded fastener 51 is arranged on one side of the upper cover far away from the end plate 2, and a rod part 512 of the threaded fastener 51 penetrates through the first through hole 31, and the second through hole 22 is in fastening connection with the second threaded hole 41.

According to some embodiments of the present application, as shown in fig. 3, 4, 5, 6, the battery pack 10 includes a plurality of columns of battery cells 1 stacked in the thickness direction, and end plates 2 located at both ends in the stacking direction. The end plate 2 is provided with a first threaded hole 21, glue is coated on the bottom of the box 4, the battery pack 10 is bonded in the box 4 through the glue, two sides along the width direction of the battery pack 10 are provided with side plates 7, and the side plates 7 are connected with the end plate 2 through buckles. A cover plate 3 is positioned at the upper end of the case 4 to cover the battery pack 10. The cover plate 3 is provided with a first through hole 31, a sealing piece 6 is arranged between the cover plate 3 and the end plate 2, a limiting part 511 of the threaded fastener 51 is arranged on one side of the upper cover far away from the end plate 2, and a rod part 512 of the threaded fastener 51 penetrates through the first through hole 31 to be in fastening connection with the first threaded hole 21.

Claims

1. A battery, comprising:

the battery pack is formed by stacking a plurality of battery cells, end plates are respectively arranged at two ends along the stacking direction of the battery cells, and the stacking direction is perpendicular to the surface with the largest surface area of the battery cells;

the battery pack is arranged on the box body;

and the cover plate is positioned at the top of the battery pack and used for covering the battery pack, and the cover plate is fixedly connected with the end plate.

2. The battery of claim 1, further comprising a fastener for fixedly connecting the end plate to the cover plate.

3. The battery of claim 2, wherein the cover plate is provided with a first through hole, and the fastener is a threaded fastener that passes through the first through hole and is screwed with the end plate.

4. The battery of claim 3, wherein the threaded fastener comprises a limiting portion and a rod portion, the limiting portion is abutted to one side, away from the end plate, of the cover plate and limits the cover plate, the rod portion is provided with a first external thread, and the rod portion penetrates through the first through hole and is in threaded connection with the end plate.

5. The battery of claim 4, wherein the end plate is provided with a first threaded hole disposed opposite the first through hole, and the stem portion penetrates the first threaded hole and is fixedly connected with the first threaded hole.

6. The battery of claim 4, wherein the end plate is provided with a second through hole, the case is provided with a second threaded hole, the second through hole is disposed opposite to the first through hole and the second threaded hole, and the rod portion penetrates the second through hole and the second threaded hole and is fixedly connected with the second threaded hole.

7. The battery of claim 6, wherein the housing is provided with a mounting beam, the end plate is connected to the mounting beam, and the mounting beam is provided with a second threaded hole.

8. A battery according to claim 3, wherein the end plate is provided with a threaded rod having a second external thread, the threaded rod passing through the first through hole and being threadably connected to the threaded fastener.

9. The battery of claim 8, wherein the threaded fastener comprises a main body portion and a flange portion protruding from the main body portion, the main body portion is provided with a third thread, the flange portion is located on one side of the cover plate away from the end plate and used for limiting the cover plate, and the screw is fixedly connected with the third threaded hole.

10. The battery of any of claims 1-9, further comprising a seal between the end plate and the cover plate for sealing a connecting interface of the end plate and the cover plate.

11. The battery according to any one of claims 1 to 9, wherein the cover plate is provided with a reinforcing portion that extends in the stacking direction.

12. The battery according to any one of claims 1 to 9, wherein the cover plate is provided with a recess through which the cover plate is fixedly connected with the end plate.

13. The battery according to any one of claims 1 to 9, further comprising side plates, both ends of which are fixedly connected to the end plates at both ends of the battery pack, respectively, for restricting displacement of the end plates at both ends of the battery pack.

14. A powered device comprising a battery as claimed in any one of claims 1-13 for providing electrical energy.