CN220934304U - Battery and electricity utilization device - Google Patents

Abstract

The application discloses a battery and an electric device. The battery comprises a battery monomer, a first box body and a second box body. The first housing has an opening and includes a joint disposed around the opening. The second box sets up along first direction with first box, and the second box lid closes the opening and encloses with first box and close and form the chamber of holding, and the battery monomer sets up in the chamber of holding. The joint portion is equipped with the concave part along the one side of first direction towards the second box, and the second box includes insert portion and joint portion, and at least part of insert portion holds in the concave part, and at least part of joint portion is located the joint portion and faces the one side of holding the chamber, and joint portion joint is in joint portion and is used for restricting the removal of second box along first direction. The application can improve the assembly efficiency of the battery and the reliability of the battery.

Description

Battery and electricity utilization device

Technical Field

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

Background

With the development of new energy technology, the battery is increasingly widely applied, for example, to mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy automobiles, electric toy ships, electric toy airplanes, electric tools and the like.

In battery technology, how to effectively improve the assembly efficiency of a battery is a problem to be solved in battery technology.

Disclosure of utility model

The application provides a battery and an electric device, which can improve the assembly efficiency of the battery and the reliability of the battery.

In a first aspect, the present application provides a battery comprising a battery cell, a first case, and a second case. The first housing has an opening and includes a joint disposed around the opening. The second box sets up along first direction with first box, and the second box lid closes the opening and encloses with first box and close and form the chamber of holding, and the battery monomer sets up in the chamber of holding. The joint portion is equipped with the concave part along the one side of first direction towards the second box, and the second box includes insert portion and joint portion, and at least part of insert portion holds in the concave part, and at least part of joint portion is located the joint portion and faces the one side of holding the chamber, and joint portion joint is in joint portion and is used for restricting the removal of second box along first direction.

The cooperation of concave part and insert portion can play the effect of location at the in-process of equipment first box and second box to improve the precision that joint portion and joint portion are aimed at, reduce joint portion and joint portion assembly dislocation's risk, reduce the equipment process, improve the packaging efficiency of battery, reduce the cost of battery. The joint portion joint can restrict the removal of second box along first direction in joint portion, and joint portion and insert portion cooperation can restrict the removal of second box in some directions that intersect with first direction to realize the connection between first box and the second box. The clamping part and the joint part are clamped in the battery, so that the risk of clamping failure caused by external false collision is reduced in the production, transportation and use processes of the battery, and the reliability of the battery is improved.

In some embodiments, the battery further includes a seal, at least a portion of which is received in the recess and disposed between the insert and the engaging portion.

By providing the seal member, the sealability of the battery can be improved. The concave part can position the sealing element, so that the sealing element is convenient to install.

In some embodiments, the seal comprises a sealant, at least a portion of the sealant being disposed in the recess and bonded to the insert and the joint.

The sealant may fill the gap between the insertion portion and the joint portion, thereby improving sealability. The sealant can also bond the joint part and the insertion part, so that the connection strength of the first box body and the second box body is improved, and the reliability of the battery is improved. The concave part can limit the sealant, so that the risk of overflow of the sealant in the assembly process is reduced.

In some embodiments, the second case includes a plurality of clamping portions disposed at intervals along a circumference of the opening. Through setting up a plurality of joint portions, can improve the joint intensity of first box and second box, reduce the risk that first box and second box joint became invalid, improve the reliability of battery.

In some embodiments, the joint includes a bottom wall, a first side wall surrounding the opening, and a second side wall surrounding the first side wall, the first side wall and the second side wall being connected to the bottom wall and surrounding the recess with the bottom wall. The concave part is arranged to be annular, so that the matching area of the concave part and the insertion part can be increased, the positioning precision is improved, the assembly difficulty is reduced, and the production efficiency is improved.

In some embodiments, the engaging portion further includes a clamping structure disposed on the first side wall, at least a portion of the clamping portion is located on a side of the first side wall away from the second side wall, and the clamping portion is engaged with the clamping structure. The second side wall can separate the matching position of the clamping part and the clamping structure from the external space of the battery, so that the risk of clamping failure of the clamping part and the joint part is reduced.

In some embodiments, the clamping structure includes a protrusion protruding from a surface of the first sidewall remote from the second sidewall. The clamping part is provided with a clamping hole, and the bulge is inserted into the clamping hole. After the protrusions are inserted into the clamping holes, movement of the clamping portions can be limited in the first direction, and therefore the risk that the second box body is separated from the first box body when the battery vibrates is reduced.

In some embodiments, the second case includes a case main body and a flange portion surrounding an outer periphery of the case main body, the case main body abuts against the first sidewall in the first direction, and the case main body and the first case enclose to form a receiving chamber, and the flange portion covers at least part of the recess in the first direction. The insertion portion extends from a surface of the flange portion facing the recess.

The sealing property of the battery can be improved by abutting the case main body against the first side wall in the first direction. When the first case and the second case are assembled, the case main body and the first side wall can be abutted against each other in the first direction as a sign that the second case is mounted in place. The flange portion can cover at least part of the recess portion, thereby preventing external impurities to a certain extent, reducing impurities in the recess portion, reducing risks of impurities entering the battery, and improving reliability of the battery.

In some embodiments, the second side wall projecting bottom wall has a dimension greater than a dimension of the first side wall projecting bottom wall in the first direction. The flange portion is located on a side of the second side wall facing the first side wall.

Through the size of increase second lateral wall along the first direction, can make the second lateral wall carry out spacingly to flange portion from the outside to improve the stability that first box and second box are connected.

In some embodiments, the outer periphery of the flange portion has a chamfer face facing the recess in the first direction. The chamfer may serve as a guide to guide the insertion portion into the recess when the first and second cases are assembled.

In some embodiments, the end surface of the second side wall away from the bottom wall is flush with the surface of the flange portion facing away from the recess, so as to reduce exposed edges of the battery, improve the appearance of the battery, and reduce the risk of damage to the battery due to collision.

In some embodiments, the flange portion abuts the second sidewall in the first direction. The insertion portion is entirely accommodated in the recess.

The flange part and the box main body are respectively propped against the second side wall and the first side wall, so that the second box body completely covers the concave part, and the risk of external impurities entering the concave part is reduced. The insertion part is integrally accommodated in the concave part, and the insertion part and the joint part can share a space in the first direction, so that the space utilization rate is improved, the maximum size of the battery along the first direction is reduced, and the energy density is improved.

In some embodiments, the second housing further comprises a flange portion connected to a surface of the flange portion facing the recess and surrounding an outer side of the second sidewall. The outward flange can shield the second side wall, reduce the risk that external impurities enter the concave part from the gap between the second side wall and the flange part, and improve the tightness and the reliability.

In some embodiments, the tank body has an inner surface for enclosing the receiving cavity and an abutment surface connected to an end of the inner surface near the second tank body for abutting against the first sidewall. The clamping part is connected to the inner surface and protrudes out of the abutting surface in the first direction.

The clamping part protrudes out of the abutting surface so as to be clamped with the joint part when the abutting surface abuts against the first side wall. The clamping part is connected to the inner surface so as to fully utilize the inner space of the box body and reduce the risk of interference between the clamping part and the first side wall.

In some embodiments, the second case further includes a stiffener disposed on the inner surface, the stiffener being connected to the clamping portion. Through setting up the strengthening rib, can improve the intensity of second box. The strengthening rib is connected in joint portion, can transmit when joint portion warp, dispersion stress reduces the risk that the second box breaks near joint portion, improves the reliability of battery.

In some embodiments, the first housing is an integrally formed structure. By adopting an integrated structure, the structural strength of the first box body can be improved, and the reliability and the tightness of the battery are improved.

In some embodiments, the second housing is an integrally formed structure. By adopting the integrated structure, the structural strength of the second box body can be improved, and the reliability and the tightness of the battery are improved.

In some embodiments, the material of the first case is plastic. The weight of plastics is little, adopts the first box of plastics material, can promote the energy density of battery.

In some embodiments, the material of the second case is plastic. The weight of plastics is little, adopts the second box of plastics material, can promote the energy density of battery.

In a second aspect, the present application provides an electrical device comprising a battery provided in any of the embodiments of the first aspect, the battery being for providing electrical energy.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

Fig. 2 is a schematic structural diagram of a battery according to some embodiments of the present application;

FIG. 3 is a schematic cross-sectional view of the battery shown in FIG. 2;

FIG. 4 is a schematic view of the first and second cases shown in FIG. 2;

FIG. 5 is an enlarged schematic view of FIG. 3 at the circle;

FIG. 6 is an enlarged schematic view of FIG. 4 at circle A;

FIG. 7 is an enlarged schematic view of FIG. 4 at circle B;

Fig. 8 is a schematic structural view of a second case of a battery according to some embodiments of the present application;

FIG. 9 is an enlarged schematic view of FIG. 8 at the circle;

Fig. 10 is a schematic view, partially in section, of a battery provided in accordance with further embodiments of the present application.

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

The reference numerals are as follows:

1. a vehicle; 2. a battery; 3. a controller; 4. a motor;

10. A battery cell;

20. A first case; 20a, openings; 21. a joint; 211. a concave portion; 212. a protrusion; 212a, a clamping structure; 213. a bottom wall; 214. a first sidewall; 215. a second sidewall; 215a, end faces;

30. A second case; 31. an insertion section; 32. a clamping part; 321. a clamping hole; 33. a box main body; 331. an inner surface; 332. an abutment surface; 34. a flange portion; 34a, a surface; 341. chamfering the surface; 35. reinforcing ribs; 36. a flanging;

40. A seal;

s, a containing cavity; z, the first direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily 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 may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication 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 according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

In the embodiment of the application, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell which can activate the active material in a charging mode to continue to use after the battery cell discharges.

The battery cell may be a lithium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc., which is not limited by the embodiment of the application.

The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through.

In some embodiments, the battery cell may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like.

As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, and the prismatic battery cell includes a square-case battery cell, a blade-shaped battery cell, a polygonal-prismatic battery cell, such as a hexagonal-prismatic battery cell, etc., and the present application is not particularly limited.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.

In some embodiments, the battery may be a battery pack including a case and a battery cell, the battery cell or battery module being housed in the case. The box body can protect the battery monomer to reduce the pollution of external impurities to the battery monomer, prolong the service life of the battery monomer.

In some embodiments, the case generally includes a first case and a second case that are mutually covered, and the first case and the second case together define a receiving chamber for receiving the battery cell. In the production process of the battery, the assembly efficiency of the first box body and the second box body directly influences the production efficiency of the battery.

In the related art, the first case and the second case are generally connected through welding or bolts, the processes of welding and bolting are complicated, and the assembly process of the first case and the second case is complicated, which affects the production efficiency of the battery.

In view of the above, an embodiment of the present application provides a battery including a battery cell, a first case, and a second case. The first housing has an opening and includes a joint disposed around the opening. The second box body and the first box body are arranged along the first direction. The second box covers the opening and encloses with the first box to form and hold the chamber, and the battery monomer sets up in holding the chamber. The joint portion is equipped with the concave part along the one side of first direction towards the second box, and the second box includes insert portion and joint portion, and at least part of insert portion holds in the concave part, and at least part of joint portion is located the joint portion and faces the one side of holding the chamber, and joint portion joint is in joint portion and is used for restricting the removal of second box along first direction. The inserting part and the concave part can play a role in positioning when the first box body and the second box body are assembled, so that the clamping of the clamping part and the joint part is facilitated, the assembly process of the first box body and the second box body is simplified, the assembly efficiency is improved, and the cost of the battery is reduced.

The battery described in the embodiment of the application is suitable for an electric device using the battery.

The battery cell, the battery and the power utilization device disclosed by the embodiment of the application can be used for a power utilization device using the battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

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

Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.

As shown in fig. 1, the interior of the vehicle 1 is provided with a battery 2, and the battery 2 may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1.

The vehicle 1 may further comprise a controller 3 and a motor 4, the controller 3 being arranged to control the battery 2 to power the motor 4, for example for operating power requirements during start-up, navigation and driving of the vehicle 1.

In some embodiments of the application, the battery 2 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

Fig. 2 is a schematic structural diagram of a battery according to some embodiments of the present application; FIG. 3 is a schematic cross-sectional view of the battery shown in FIG. 2; FIG. 4 is a schematic view of the first and second cases shown in FIG. 2; FIG. 5 is an enlarged schematic view of FIG. 3 at the circle; FIG. 6 is an enlarged schematic view of FIG. 4 at circle A; fig. 7 is an enlarged schematic view of fig. 4 at circle B.

Referring to fig. 2 to 7, the battery 2 of the embodiment of the present application includes a battery cell 10, a first case 20, and a second case 30. The first casing 20 has an opening 20a, and the first casing 20 includes a joint 21 provided around the opening 20 a. The second casing 30 is disposed along the first direction Z with the first casing 20. The second case 30 covers the opening 20a and encloses the first case 20 to form a receiving chamber S, and the battery cell 10 is disposed in the receiving chamber S. The engaging portion 21 is provided with a recess 211 facing the second case 30 along the first direction Z, the second case 30 includes an inserting portion 31 and a locking portion 32, at least part of the inserting portion 31 is accommodated in the recess 211, at least part of the locking portion 32 is located at a side of the engaging portion 21 facing the accommodating cavity S, and the engaging portion 21 is locked to the locking portion 32 and is used for limiting movement of the second case 30 along the first direction Z.

The battery cell 10 may be the smallest unit constituting the battery 2.

In the battery 2, the number of the battery cells 10 may be one or more. If there are multiple battery cells 10, the multiple battery cells 10 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to that there are both series connection and parallel connection among the multiple battery cells 10. The plurality of battery cells 10 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 10 is accommodated in the box body; of course, a plurality of battery cells 10 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form a whole and accommodated in the case.

The first case 20 may have a hollow structure having an opening 20a, and the joint 21 may enclose the opening 20a. Illustratively, the battery cell 10 may be placed into the first case 20 via the opening 20a.

The second casing 30 may be a plate-like structure or a hollow structure having one side opened, for example.

The first casing 20 and the second casing 30 may be various shapes such as a cylinder, a rectangular parallelepiped, etc.

The material of the first casing 20 may be the same as or different from that of the second casing 30. Illustratively, the material of the first casing 20 may be metal, plastic, or other materials, such as, for example, metals including, but not limited to, steel, nickel-plated steel, aluminum alloys, copper, and the like. The material of the second case 30 may be metal, plastic or other materials.

The first case 20 may be an integrally formed structure, or may be formed by splicing a plurality of separately formed members. The second case 30 may be an integrally formed structure, or may be formed by splicing a plurality of separately formed members.

The number of the concave portions 211 may be one or a plurality. In some examples, the recess 211 may be one, the recess 211 being an annular recess disposed around the opening 20 a. In other examples, the recess 211 may be plural, and the plural recesses 211 are arranged at intervals along the circumferential direction of the opening 20 a; in still other examples, the recess 211 is a plurality, each recess 211 is an annular recess disposed around the opening 20a, and the plurality of recesses 211 are disposed in sequence in a direction away from the opening 20 a.

The number of the insertion portions 31 may be one or a plurality. In some examples, the insertion portion 31 may be plural, and plural insertion portions 31 may be inserted into the same recess 211, or may be inserted into different recesses 211. The insertion portion 31 may be entirely accommodated in the recess 211, or may be only partially accommodated in the recess 211.

The number of the engaging portions 32 may be one or plural.

In the embodiment of the application, the matching of the concave part 211 and the insertion part 31 can play a role in positioning in the process of assembling the first box body 20 and the second box body 30, so that the alignment precision of the clamping part 32 and the joint part 21 is improved, the assembly dislocation risk of the clamping part 32 and the joint part 21 is reduced, the assembly process is reduced, the assembly efficiency of the battery 2 is improved, and the cost of the battery 2 is reduced. The joint portion 21 is clamped to the clamping portion 32, so that movement of the second case 30 along the first direction Z can be limited, and the joint portion 21 cooperates with the insertion portion 31, so that movement of the second case 30 in directions intersecting the first direction Z can be limited, and connection between the first case 20 and the second case 30 is achieved. The clamping part 32 and the joint part 21 are clamped in the battery 2, so that the risk of clamping failure caused by external false collision is reduced in the production, transportation and use processes of the battery 2, and the reliability of the battery 2 is improved.

In some embodiments, the first housing 20 is made of plastic. The first case 20 made of plastic has a small weight, and can increase the energy density of the battery 2.

In some embodiments, the material of the second case 30 is plastic. The weight of the plastic is small, and the energy density of the battery 2 can be improved by adopting the second case 30 made of plastic.

In some embodiments, the material of the first case 20 and the material of the second case 30 are both plastic.

In some embodiments, the first housing 20 is an integrally formed structure. By adopting the integrally formed structure, the structural strength of the first case 20 can be improved, and the reliability and the sealing performance of the battery 2 can be improved.

Alternatively, the first casing 20 is integrally formed through an injection molding process.

In some embodiments, the second housing 30 is an integrally formed structure. By adopting the integrally formed structure, the structural strength of the second case 30 can be improved, and the reliability and the sealing performance of the battery 2 can be improved.

Alternatively, the second casing 30 is integrally formed through an injection molding process.

In some embodiments, the first direction Z may be parallel to the direction of gravity when the battery 2 is mounted to the powered device.

Alternatively, the first casing 20 may be positioned at the lower side of the second casing 30, and in this case, the first casing 20 may be referred to as a lower casing and the second casing 30 may be referred to as an upper casing.

In some embodiments, the engagement portion 21 may limit movement of the insertion portion 31 in a direction perpendicular to the first direction Z to some extent.

In some embodiments, the battery 2 further includes a seal 40, at least a portion of the seal 40 being received in the recess 211 and disposed between the insertion portion 31 and the engagement portion 21.

The seal 40 may take a variety of forms.

In some examples, the seal 40 comprises a gasket, at least a portion of which is sandwiched between the insert portion 31 and the engagement portion 21; by compressing the gasket, the gap between the insertion portion 31 and the joint portion 21 can be sealed. Alternatively, the insert 31 and the engaging portion 21 compress the gasket in the first direction Z.

In other examples, the seal 40 may include a sealant that may fill the gap between the insert portion 31 and the joint portion 21, thereby achieving a seal.

The embodiment of the application can improve the sealability of the battery 2 by providing the sealing member 40. The recess 211 may position the seal 40 to facilitate installation of the seal 40.

In some embodiments, the seal 40 comprises a sealant, at least a portion of which is disposed in the recess 211 and bonded to the insert portion 31 and the joint portion 21.

The sealant may fill the gap between the insertion portion 31 and the joint portion 21, thereby improving sealability. The sealant may also adhere the joint portion 21 and the insertion portion 31, thereby improving the connection strength of the first case 20 and the second case 30 and improving the reliability of the battery 2. The concave part 211 can limit the sealant, so that the risk of overflow of the sealant in the assembly process is reduced.

In some embodiments, during the assembly of the battery 2, glue may be injected into the recess 211 first, and then the insertion portion 31 of the second case 30 is inserted into the recess 211; and curing the glue to form the sealant.

In some embodiments, the second case 30 includes a plurality of clamping portions 32, and the plurality of clamping portions 32 are disposed at intervals along the circumferential direction of the opening 20 a.

The plurality of engaging portions 32 may have the same structure or may have different structures.

By providing the plurality of clamping portions 32, the clamping strength of the first case 20 and the second case 30 can be improved, the risk of failure of the first case 20 and the second case 30 due to clamping can be reduced, and the reliability of the battery 2 can be improved.

In some embodiments, the engaging portion 21 includes a protrusion 212, the clamping portion 32 is provided with a clamping hole 321, and the protrusion 212 is inserted into the clamping hole 321 to clamp the engaging portion 21 with the clamping portion 32. In other alternative embodiments, the engaging portion 21 is provided with a clamping hole 321, and the clamping portion 32 includes a protrusion 212, and the protrusion 212 is inserted into the clamping hole 321 to clamp the engaging portion 21 with the clamping portion 32.

In some embodiments, the second housing 30 includes a plurality of clamping portions 32, and the engaging portion 21 is provided with both the protrusions 212 and the clamping portions 32. A part of the plurality of engaging portions 32 is provided with engaging holes 321, and the projections 212 of the engaging portions 21 are inserted into the engaging holes 321 of the engaging portions 32; another portion of the plurality of engaging portions 32 is provided with projections 212, and the projections 212 of the engaging portions 32 are inserted into the engaging holes 321 of the engaging portion 21.

In some embodiments, the joint 21 includes a bottom wall 213, a first side wall 214, and a second side wall 215, the first side wall 214 encloses the opening 20a, the second side wall 215 surrounds the outside of the first side wall 214, and the first side wall 214 and the second side wall 215 are connected to the bottom wall 213 and enclose the recess 211 with the bottom wall 213.

The height of the first side wall 214 protruding from the bottom wall 213 and the height of the second side wall 215 protruding from the bottom wall 213 may be the same or different in the first direction Z.

The concave portion 211 is annular, so that the matching area of the concave portion 211 and the insertion portion 31 can be increased, positioning accuracy is improved, assembly difficulty is reduced, and production efficiency is improved.

In addition, the concave portion 211 is annular, so that the sealant can be conveniently and continuously coated in the concave portion 211, and the gluing efficiency can be improved.

In some embodiments, the first sidewall 214 may limit the plurality of clamping portions 32 from outside to limit movement of the second case 30 in a direction perpendicular to the first direction Z by the plurality of clamping portions 32.

In some embodiments, the insert 31 is an annular structure surrounding the opening 20 a. The annular insertion portion 31 is matched with the annular concave portion, so that assembly difficulty can be reduced, and sealing performance is improved.

In some embodiments, the engaging portion 21 further includes a clamping structure 212a disposed on the first sidewall 214, at least a portion of the clamping portion 32 is located on a side of the first sidewall 214 away from the second sidewall 215, and the clamping portion 32 is engaged with the clamping structure 212 a.

Illustratively, the clamping structure 212a may include at least one of a hole and a protrusion.

The engagement portion 21 may include one or more engagement structures 212a.

The second side wall 215 can separate the mating part of the clamping part 32 and the clamping structure 212a from the external space of the battery 2, so that the risk of clamping failure of the clamping part 32 and the joint part 21 is reduced.

In some embodiments, the engagement portion 21 includes a plurality of engagement structures 212a, the plurality of engagement structures 212a being spaced apart along the circumference of the opening 20 a.

The plurality of engagement structures 212a may be the same or different. For example, some of the clamping structures 212a are protrusions and other clamping structures 212a are holes.

In some embodiments, the clamping structure 212a includes a protrusion 212, and the protrusion 212 protrudes from a surface of the first sidewall 214 away from the second sidewall 215. The engaging portion 32 is provided with an engaging hole 321, and the protrusion 212 is inserted into the engaging hole 321.

The clamping hole 321 may be a blind hole or a through hole.

After the protrusion 212 is inserted into the locking hole 321, the movement of the locking portion 32 may be restricted in the first direction Z, thereby reducing the risk of the second casing 30 being separated from the first casing 20 when the battery 2 vibrates.

In other embodiments, the clamping structure 212a includes a clamping hole 321, and the clamping portion 32 includes a protrusion 212, and the protrusion 212 is inserted into the clamping hole 321. The clamping hole 321 extends from the surface of the first sidewall 214 away from the second sidewall 215.

The clamping hole 321 may be a through hole or a blind hole. Optionally, the clamping hole 321 is a blind hole, and the clamping hole 321 is separated from the concave portion 211, so that the risk of sealant flowing into the battery 2 is reduced.

In some embodiments, the second casing 30 includes a casing main body 33 and a flange portion 34 surrounding an outer periphery of the casing main body 33, the casing main body 33 abuts against the first side wall 214 in the first direction Z, and the casing main body 33 encloses with the first casing 20 to form the accommodation chamber S, and the flange portion 34 covers at least part of the recess 211 in the first direction Z. The insertion portion 31 extends from a surface of the flange portion 34 facing the recess 211.

The sealing property of the battery 2 can be improved by abutting the case main body 33 against the first side wall 214 in the first direction Z. When the first casing 20 and the second casing 30 are assembled, the casing main body 33 may be abutted against the first side wall 214 in the first direction Z as a mark for the second casing 30 to be mounted in place. The flange portion 34 may cover at least part of the recess 211, thereby preventing external impurities to some extent, reducing impurities in the recess 211, reducing the risk of impurities entering the inside of the battery 2, and improving the reliability of the battery 2.

In some embodiments, the case main body 33 abuts against the first sidewall 214 in the first direction Z, thereby blocking the sealant, reducing the risk of the sealant entering the receiving chamber S, reducing the risk of the sealant contaminating the battery cell 10, and improving reliability. The flange portion 34 may block the sealant to some extent, reducing the risk of sealant overflow.

In some embodiments, a sealant may also be disposed between the tank main body 33 and the first side wall 214.

In some embodiments, in the first direction Z, a dimension H2 of the second sidewall 215 protruding from the bottom wall 213 is greater than a dimension H1 of the first sidewall 214 protruding from the bottom wall 213. The flange portion 34 is located on a side of the second side wall 215 facing the first side wall 214.

By increasing the dimension of the second side wall 215 in the first direction Z, the flange 34 can be restrained by the second side wall 215 from the outside, thereby improving the stability of the connection of the first casing 20 and the second casing 30.

In addition, by increasing the size of the second sidewall 215 in the first direction Z, the path along which the sealant flows can be also lengthened, the risk of the sealant flowing out from between the second sidewall 215 and the flange portion 34 is reduced, the overflow of the sealant is reduced, and the appearance of the battery 2 is improved.

In some embodiments, the outer periphery of the flange portion 34 has a chamfer surface 341, the chamfer surface 341 facing the recess 211 in the first direction Z.

Illustratively, the chamfer surface 341 may be a surface formed after chamfering, or may be a surface formed after chamfering.

The chamfer 341 may serve as a guide to guide the insertion portion 31 into the recess 211 when the first and second cases 20 and 30 are assembled.

In addition, by providing the chamfer 341, the space between the flange 34 and the joint 21 can be increased, so that more sealant can be contained and overflow of the sealant can be reduced.

In some embodiments, an end surface 215a of the second sidewall 215 remote from the bottom wall 213 is flush with a surface 34a of the flange portion 34 remote from the recess 211.

According to the embodiment of the application, the exposed edges of the battery 2 can be reduced, the appearance of the battery 2 is improved, and the risk of collision damage of the battery 2 is reduced.

Fig. 8 is a schematic structural view of a second case of a battery according to some embodiments of the present application; fig. 9 is an enlarged schematic view of fig. 8 at a circle.

Referring to fig. 5, 8 and 9, in some embodiments, the case body 33 has an inner surface 331 and an abutment surface 332, the inner surface 331 is configured to enclose the accommodation chamber S, and the abutment surface 332 is connected to an end of the inner surface 331 near the second case 30 and is configured to abut against the first sidewall 214. The clamping portion 32 is connected to the inner surface 331 and protrudes from the abutment surface 332 in the first direction Z.

Illustratively, the abutment surface 332 is an annular surface.

The engagement portion 32 protrudes from the contact surface 332 so as to be able to engage with the engagement portion 21 when the contact surface 332 abuts against the first side wall 214. The clamping portion 32 is connected to the inner surface 331 to fully utilize the inner space of the case main body 33 and reduce the risk of interference between the clamping portion 32 and the first sidewall 214.

In some embodiments, the second case 30 further includes a reinforcing rib 35 disposed on the inner surface 331, and the reinforcing rib 35 is connected to the clamping portion 32.

The number of the reinforcing ribs 35 may be one or a plurality of.

The ribs 35 may be bar-shaped, rectangular, honeycomb-shaped, circular or other shapes.

By providing the reinforcing ribs 35, the strength of the second casing 30 can be improved. The reinforcing ribs 35 are connected to the clamping portion 32, and can transmit and disperse stress when the clamping portion 32 is deformed, thereby reducing the risk of breakage of the second case 30 in the vicinity of the clamping portion 32 and improving the reliability of the battery 2.

Fig. 10 is a schematic view, partially in section, of a battery provided in accordance with further embodiments of the present application.

As shown in fig. 10, in some embodiments, in the first direction Z, the flange portion 34 abuts against the second sidewall 215. The insertion portion 31 is entirely accommodated in the recess 211.

The flange portion 34 and the case main body 33 are abutted against the second side wall 215 and the first side wall 214, respectively, so that the second case 30 completely covers the recess 211, reducing the risk of external impurities entering the recess 211. The insertion portion 31 is entirely accommodated in the recess 211, and the insertion portion 31 and the joint portion 21 can share a space in the first direction Z, thereby improving space utilization, reducing the maximum size of the battery 2 in the first direction Z, and improving energy density.

In some embodiments, the flange portion 34 abuts against the second sidewall 215, and overflow of sealant can be reduced.

In some embodiments, the second housing 30 further includes a flange 36, the flange 36 being connected to a surface of the flange portion 34 facing the recess 211 and surrounding an outer side of the second sidewall 215.

The flange 36, the flange 34 and the insertion portion 31 enclose a slot, and at least a portion of the second sidewall 215 is inserted into the slot.

The flange 36 can shield the second side wall 215, reduce the risk of foreign substances entering the recess 211 from the gap between the second side wall 215 and the flange portion 34, and improve the sealing property and reliability.

In addition, the flange 36 may also stop the sealant, extend the flow path of the sealant, and reduce the risk of sealant overflow.

According to some embodiments of the present application, the present application also provides an electric device, including the battery 2 of any one of the above embodiments, where the battery 2 is used to provide electric energy for the electric device. The powered device may be any of the aforementioned devices or systems employing the battery 2.

Referring to fig. 2 to 9, a battery 2 according to some embodiments of the present application includes a plurality of battery cells 10, a first case 20, and a second case 30. The second casing 30 is disposed along the first direction Z with the first casing 20.

The first casing 20 has an opening 20a, and the first casing 20 includes a joint 21 provided around the opening 20 a. The joint portion 21 includes a bottom wall 213, a first side wall 214, a second side wall 215, and a plurality of protrusions 212, the first side wall 214 encloses the opening 20a, the second side wall 215 surrounds the outside of the first side wall 214, the first side wall 214 and the second side wall 215 are connected to the bottom wall 213 and enclose a recess 211 with the bottom wall 213, and the recess 211 faces the second case 30 along the first direction Z. The protrusions 212 protrude from a surface of the first sidewall 214 away from the second sidewall 215, and the protrusions 212 are spaced apart along the circumference of the opening 20 a.

The second case 30 covers the opening 20a and encloses the first case 20 to form a receiving chamber S, and the battery cell 10 is disposed in the receiving chamber S.

The second casing 30 includes a casing main body 33, a flange portion 34 surrounding the outer periphery of the casing main body 33, an insertion portion 31 connected to the flange portion 34, and a locking portion 32 connected to the casing main body 33. The case main body 33 abuts against the first side wall 214 in the first direction Z, and the case main body 33 encloses the first case 20 to form the accommodation chamber S, and the flange portion 34 covers at least part of the recess 211 in the first direction Z. The insertion portion 31 extends from a surface of the flange portion 34 facing the recess 211 and protrudes into the recess 211.

At least part of the clamping portion 32 is located on one side of the first side wall 214 facing the accommodating cavity S, and the clamping portion 32 is provided with a clamping hole 321. The plurality of clamping portions 32 are provided, and the plurality of protrusions 212 are respectively inserted into the clamping holes 321 of the plurality of clamping portions 32 to limit the movement of the second case 30 along the first direction Z.

In the first direction Z, a dimension H2 of the second side wall 215 protruding from the bottom wall 213 is larger than a dimension H1 of the first side wall 214 protruding from the bottom wall 213. The flange portion 34 is located on a side of the second side wall 215 facing the first side wall 214. The battery 2 further includes a sealant, at least part of which is provided in the recess 211 and adhered to the insertion portion 31 and the joint portion 21.

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

Claims (18)

1. A battery, comprising:

A battery cell;

A first housing having an opening, the first housing including a joint disposed around the opening;

The second box body is arranged along a first direction with the first box body, the second box body covers the opening and encloses the first box body to form a containing cavity, and the battery unit is arranged in the containing cavity;

The second box comprises an insertion portion and a clamping portion, at least part of the insertion portion is accommodated in the concave portion, at least part of the clamping portion is located on one side of the joint portion, facing the accommodating cavity, of the joint portion, and the joint portion is clamped to the clamping portion and used for limiting movement of the second box in the first direction.

2. The battery of claim 1, further comprising a seal, at least a portion of the seal being received in the recess and disposed between the insert and the engagement.

3. The battery of claim 2, wherein the seal comprises a sealant, at least a portion of the sealant being disposed in the recess and bonded to the insert portion and the engaging portion.

4. The battery of claim 1, wherein the second case includes a plurality of clamping portions disposed at intervals along a circumferential direction of the opening.

5. The battery of any one of claims 1-4, wherein the junction comprises a bottom wall, a first side wall and a second side wall, the first side wall surrounding the opening, the second side wall surrounding an outer side of the first side wall, the first side wall and the second side wall being connected to the bottom wall and surrounding the recess with the bottom wall.

6. The battery of claim 5, wherein the engagement portion further comprises a clamping structure disposed on the first side wall, at least a portion of the clamping portion being located on a side of the first side wall remote from the second side wall, the clamping portion being engaged with the clamping structure.

7. The battery of claim 6, wherein the clamping structure includes a protrusion protruding from a surface of the first sidewall remote from the second sidewall;

The clamping part is provided with a clamping hole, and the protrusion is inserted into the clamping hole.

8. The battery of claim 5, wherein the battery is configured to provide the battery with a battery cell,

The second box body comprises a box main body and a flange part encircling the periphery of the box main body, the box main body is propped against the first side wall along the first direction, the box main body and the first box body are enclosed to form the accommodating cavity, and the flange part covers at least part of the concave part along the first direction;

The insertion portion extends from a surface of the flange portion facing the recess portion.

9. The battery of claim 8, wherein a dimension of the second side wall protruding from the bottom wall is greater than a dimension of the first side wall protruding from the bottom wall in the first direction;

The flange portion is located on a side of the second side wall facing the first side wall.

10. The battery according to claim 9, wherein an outer periphery of the flange portion has a chamfer face that faces the recess in the first direction.

11. The battery of any of claims 8-10, wherein an end surface of the second side wall remote from the bottom wall is flush with a surface of the flange portion remote from the recess.

12. The battery of claim 8, wherein in the first direction, the flange portion abuts the second sidewall;

the insertion portion is integrally accommodated in the recess.

13. The battery of claim 12, wherein the second case further comprises a flange portion connected to a surface of the flange portion facing the recess portion and surrounding an outer side of the second side wall.

14. The battery according to any one of claims 8 to 10, wherein the case main body has an inner surface for enclosing the accommodation chamber and an abutment surface connected to an end of the inner surface near the second case for abutting against the first side wall;

the clamping part is connected to the inner surface and protrudes out of the abutting surface in the first direction.

15. The battery of claim 14, wherein the second housing further comprises a stiffener disposed on the inner surface, the stiffener being connected to the clip.

16. The battery of any one of claims 1-4, wherein the first housing is an integrally formed structure; and/or

The second box body is of an integrated structure.

17. The battery of any one of claims 1-4, wherein the first housing is plastic; and/or

The second box body is made of plastic.

18. An electrical device comprising a battery according to any one of claims 1-17 for providing electrical energy.