CN220895754U - Battery and power utilization device - Google Patents

Abstract

The application relates to the technical field of batteries and discloses a battery and an electric device. The battery comprises a box body, at least two battery monomers and a positioning beam. Wherein, at least two battery monomers are arranged in the box body, each battery monomer comprises a shell, and a containing groove is arranged on the shell; the locating beam is fixed with the box, and the locating beam adaptation is in the holding tank to prevent the displacement along holding tank width direction between locating beam and the battery monomer. The battery provided by the application has the advantages of good stability, high assembly efficiency and low cost. The battery of the application is used for providing electric energy for the electric device.

Description

Battery and power utilization device

Technical Field

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

Background

Batteries are increasingly used in life and industry, for example, mobile phones, notebooks and miniaturized wearable devices which are small enough to carry the batteries, and new energy automobiles which are large enough to carry the batteries are widely used; in addition, batteries are increasingly used in the field of energy storage and the like. The battery may be a battery module formed by fixing at least two battery cells, or a battery pack formed by accommodating at least two battery cells or battery modules in a case.

The battery is easy to deglue under vibration or impact of the battery, the deglued battery can collide with other parts to cause other parts to fail, the usage amount of the fixing glue is overlarge, the production cost is high, and meanwhile, when at least two battery monomers are assembled into the battery, the assembly efficiency is low. That is, the above scheme has the problems of poor battery stability, low assembly efficiency and high cost.

Disclosure of utility model

In order to solve the technical problems, the application provides a battery and an electricity utilization device, which have the advantages of good battery stability, high assembly efficiency and low cost.

The application is realized by the following technical scheme.

In a first aspect, the present application provides a battery comprising a housing, at least two battery cells, and a positioning beam. Wherein, at least two battery monomers are arranged in the box body, each battery monomer comprises a shell, and a containing groove is arranged on the shell; the locating beam is fixed with the box, and the locating beam adaptation is in the holding tank to prevent the displacement along holding tank width direction between locating beam and the battery monomer.

In the above technical scheme, because the housing of the battery cell is provided with the accommodating groove adapted to the positioning beam, in this way, under the condition that the positioning beam is fixed on the box, the relative movement of the battery cell and the positioning Liang Yanrong in the width direction of the accommodating groove can be limited by the matching of the accommodating groove and the positioning beam, so that the relative movement of the battery cell in the width direction of the accommodating groove relative to the box can be prevented. Like this, when holding two at least battery monomer in the box, the fixed locating beam of accessible box is spacing with the free storage tank of battery mutually support, improves the assembly efficiency of battery, and just because of need not set up too much fixed gluey spacing battery monomer between the battery monomer for battery assembly cost is lower, still can avoid simultaneously influencing the stability of battery because of fixed gluey drops. Therefore, the technical scheme of the application has the advantages of good battery stability, high assembly efficiency and low cost.

In one possible implementation of the present application, the battery cell includes an electrode assembly disposed in a case, the receiving groove is formed by a sidewall of the case being recessed toward the electrode assembly, and a gap is formed between a sidewall of the receiving groove toward the electrode assembly and the electrode assembly.

Since the receiving groove is formed by recessing the side wall of the case toward the electrode assembly, a gap is required between a side wall of the receiving groove toward the electrode assembly and the electrode assembly in consideration of avoiding interference of the side wall forming the receiving groove to the electrode assembly.

In one possible implementation of the present application, a minimum gap between a side wall of the receiving groove facing the electrode assembly and the electrode assembly is greater than 0 and less than or equal to 0.3mm.

Because the clearance space formed by the electrode assembly in the shell and the inner wall of the shell is limited, when the accommodating groove is recessed to the clearance space, the clearance space can be utilized to the greatest extent possible under the condition that one side wall of the accommodating groove facing the electrode assembly is not interfered with the electrode assembly. For this reason, setting the minimum gap between the electrode assembly and a side wall of the receiving groove facing the electrode assembly to be in the range of greater than 0 and less than or equal to 0.3mm, on the one hand, interference between the receiving groove and the electrode assembly can be avoided; on the other hand, the above minimum gap range may be to leave a permissible space in consideration of the proximity of the electrode assembly to the receiving groove due to thermal expansion.

In one possible implementation of the present application, the cross-sectional shape of the positioning Liang Yanrong in the width direction of the receiving groove is circular, the cross-sectional shape of the receiving groove in the width direction thereof is circular, and at least a portion of the positioning beam is fitted into the receiving groove.

The cross section of the accommodating groove along the width direction of the accommodating groove is in a circular arc structure, and the cross section of the corresponding positioning Liang Yanrong groove along the width direction is in a circular design, so that the contact area between the shell of the battery cell and the positioning beam can be relatively increased, and the limiting stability between the battery cell and the positioning beam is improved.

In one possible implementation of the present application, the cross-sectional shape of the positioning Liang Yanrong in the width direction of the receiving groove is quadrangular, the cross-sectional shape of the receiving groove in the width direction thereof is triangular, and at least a portion of the positioning beam is fitted into the receiving groove.

Here, set up the cross-sectional shape of holding groove along self width direction into triangle-shaped's structure, the cross-sectional shape of location Liang Yanrong in the groove width direction is quadrangular design for the holding groove is more fastened with the locating beam complex, is difficult for deviating from, thereby promotes battery assembly's stability.

In one possible implementation of the present application, the positioning beam is linear, and the accommodating groove is a linear groove.

Because the linear type locating beam and the linear type accommodating groove are simple and compact in structure, the battery monomers are matched conveniently, so that the battery assembly efficiency is improved, and meanwhile, the battery monomers can be assembled or disassembled in the box body conveniently along the extending direction of the locating beam because no limiting effect exists between the accommodating groove and the locating beam along the extending direction of the locating beam.

In one possible implementation of the present application, the positioning beam is curved, and the receiving groove is a curved groove to prevent displacement between the positioning beam and the battery cell in a direction parallel to the extension direction of the positioning beam itself.

According to the technical scheme, on the basis of preventing displacement between the positioning beam and the battery monomer in the width direction of the accommodating groove, the positioning beam is curved and is matched with the curved accommodating groove, and relative movement between the positioning beam and the battery monomer in the extending direction of the accommodating groove is prevented, so that the stability of the battery is further improved.

In one possible embodiment of the application, the direction of extension of the receiving groove corresponds to the height direction of the battery cell.

Because the direction of height of the battery monomer is generally perpendicular to the plane where the bottom wall of the box body is located, and the end part of the battery monomer in the direction of height is generally provided with an end cover assembly, the extending direction of the accommodating groove is consistent with the direction of height of the battery monomer, and the positioning beam can be prevented from touching related parts on the battery monomer.

In one possible embodiment of the application, the receiving groove extends through the housing in its own direction of extension.

The design is convenient for the battery monomer to be matched and installed on the positioning beam along the extending direction of the positioning beam; meanwhile, the containing groove penetrates through the shell, so that the contact area between the positioning beam and the containing groove can be increased, and the limiting effect of the containing groove and the positioning beam in the width direction of the containing groove is improved.

In one possible implementation of the application, the battery comprises at least two positioning beams, which are fixed on the same side of the case at vertical intervals, for forming at least two battery cells into a unitary array structure.

Because a locating beam can be at least matched with two adjacent battery monomers to limit, under the condition that at least two locating beams are fixed on the same side of the box body at least at vertical intervals, the relative position between the at least two battery monomers can be fixed by the at least two locating beams, so that the at least two battery monomers form an integrated array structure.

In one possible implementation of the present application, the positioning beams are made of a heat conductive material for transferring heat between two adjacent battery cells.

Because the locating beam is the heat conduction material can be with on the locating beam rather than spacing complex arbitrary battery monomer heat transfer, when a locating beam is spacing rather than two battery monomers cooperation, can be used to transfer heat between two battery monomers rather than the cooperation is spacing to promote the homogeneity of battery everywhere temperature in order to help the heat dissipation of battery.

In one possible implementation manner of the present application, the positioning beam is a hollow sealing structure, the side wall of the positioning beam is made of a heat conducting material, the positioning beam is provided with a cooling medium, and the positioning beam is used for transferring heat between two adjacent battery cells.

The positioning beam is of a hollow sealing structure and is made of a heat-conducting material, so that on one hand, the material cost of the positioning beam can be saved; on the other hand, the cooling medium in the hollow sealing structure can effectively take away the heat generated in the battery, so that the heat dissipation rate of the battery is improved, and meanwhile, the uniformity of the temperature in each part of the battery can be improved due to the fact that the positioning beam is positioned between two adjacent battery monomers, and the service cycle of the battery is prolonged.

In one possible embodiment of the application, a heat-conducting layer is filled between the positioning beam and the receiving groove, the heat-conducting layer being used for transferring heat between the housing and the positioning beam.

Because there will be the clearance between the two when joining in marriage between locating beam and the storage tank, and fill the heat conduction layer between locating beam and the storage tank and can fill the clearance between the two, make two complex inseparabler, very big degree reduced rocking between locating beam and the casing. In addition, because the heat conduction layer with heat conduction effect is filled between the positioning beam and the accommodating groove, the heat dissipation rate of the battery can be further improved.

In one possible implementation manner of the present application, the housing includes a first side wall provided with the accommodating groove and a second side wall not provided with the accommodating groove, the first side wall and the second side wall are made of different materials, and the thermal conductivity of the first side wall is greater than that of the second side wall.

Because spacing cooperation between accommodation groove and the locating beam, when the coefficient of heat conductivity of the first lateral wall that forms the accommodation groove is greater than the coefficient of heat conductivity of second lateral wall, can make the heat that produces in the battery monomer pass through the first lateral wall that forms the accommodation groove and transmit in the locating beam fast.

In one possible embodiment of the application, at least two receiving grooves are provided on each housing.

The arrangement of at least two accommodating grooves on each shell can facilitate the arrangement of at least two battery monomers into various batteries arranged in an array through the positioning beam; on the other hand, the stability of the battery can be improved.

In one possible implementation manner of the application, the shell is a square shell, two opposite side walls of the square shell are respectively provided with a containing groove, two containing grooves which are arranged in an aligned manner on two adjacent square shells are correspondingly spliced to form a containing space, and the positioning beam is positioned in the containing space.

Because the casing is square casing and all is provided with the storage tank on two opposite lateral walls, in two adjacent square casings, can splice into a accommodation space when the storage tank of one of them square casing and the storage tank of another square casing correspond the setting, be located the locating beam in this accommodation space, can be with two battery monomers adjacent to it spacing into a whole along the width direction of storage tank. Therefore, two opposite ends of one positioning beam can be matched with two limiting battery monomers, and accordingly the assembly efficiency of the battery is improved.

In a second aspect, embodiments of the present application also provide an electrical device comprising a battery provided in any one of the above first aspects for providing electrical energy.

Because the battery that this power consumption device includes has the locating beam, in at least two battery monomers in the battery, every battery monomer includes the casing, is provided with the storage tank with the locating beam adaptation on the casing, can prevent the displacement along storage tank width direction between locating beam and the battery monomer. Therefore, the power utilization device has the advantages of good stability, high assembly efficiency and low cost.

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 view of the overall structure of a battery according to some embodiments of the present application;

fig. 2 is a schematic overall structure of a battery cell according to some embodiments of the present application;

fig. 3 is a schematic view of a battery cell according to some embodiments of the present application, wherein the battery cell is shown in fig. 2 at an X-direction viewing angle;

Fig. 4 is a schematic view illustrating a gap between a receiving groove and an electrode assembly in a battery cell according to some embodiments of the present application.

Description of the reference numerals

1-A box body; 2-battery cells; 21-a housing; 211-accommodating grooves; 212-a second sidewall; 22-electrode assembly; 3-positioning beams; d-minimum gap; d-maximum amount of recess.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used 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.

In the description of embodiments of the present application, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship.

Reference herein 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, and are not intended to indicate or imply that the apparatus or element in question must have a specific orientation, be constructed, operated, or used in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of substantially parallelism as is conventionally recognized in engineering; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering.

At present, new energy batteries are increasingly widely applied to life and industry. The new energy 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.

The inventors of the present application have noted that in many application scenarios, the battery is subject to vibration or shock. Such as a battery applied to an electric vehicle, vibrations are inevitably generated during the running of the electric vehicle; the battery applied to the energy storage power supply system can also be subjected to vibration in the transportation process. The vibration can enable the battery monomers in the battery to move relative to the box body or enable the battery monomers to move relatively, long-term vibration is unavoidable because the battery monomers are stressed too much, the electrode terminals at the ends of the battery monomers deform, so that the battery monomers leak liquid and the like, and the battery monomers are invalid. Therefore, how to reduce the relative movement between the battery cells and the case is a problem to be solved.

At the end parts of some battery cells, although fixing structures for fixing the battery cells to the box body are arranged, due to the limited area of the end parts of the battery cells, the corresponding fixing structures arranged on the fixing structures tend to be small in size, and the limiting effect between adjacent battery cells in a plane perpendicular to the length direction of the battery cells is limited, so that relative displacement is easy to generate; if all rely on pouring glue to come spacing fixed battery monomer in the clearance between the battery monomer, also easily take place the condition that fixed glue drops in the long-term vibration process to influence the life cycle of battery, and pouring glue is with high costs, still appears the condition of glue spilling easily. And the free area of circumference side of battery is great, if set up between two adjacent free circumference sides of battery can with battery monomer matched with limit structure, can prevent the relative displacement between the battery monomer, make it can be fixed for the position of box, and then promote the stability of battery, reduce simultaneously and pour into glue man-hour in order to promote assembly efficiency and save cost between the battery monomer.

Based on the above design concept, referring to fig. 1, the embodiment of the present application provides a battery, in which a positioning beam 3 for limiting the relative movement between two adjacent battery cells 2 is disposed between the two adjacent battery cells 2, and displacement between the positioning beam 3 and the battery cells 2 along the width direction of the accommodating groove 211 can be prevented by adapting the positioning beam 3 to the accommodating groove on the housing 21 of the battery cell 2.

The present application will be described in detail below.

The technical scheme described by the embodiment of the application is suitable for the power utilization device of the battery for providing electric energy. The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like. The embodiment of the application does not limit the electric device in particular.

The embodiment of the application provides a battery, as shown in fig. 1 and 4, which comprises a box body 1, at least two battery monomers 2 and a positioning beam 3. Wherein, at least two battery monomers 2 are arranged in the box body 1, the battery monomers 2 comprise a shell 21, and the shell 21 is provided with a containing groove 211; the positioning beam 3 is fixed with the case 1, and the positioning beam 3 is fitted in the accommodating groove 211 to prevent displacement between the positioning beam 3 and the battery cell 2 in the width direction of the accommodating groove 211.

The battery in the embodiment of the application can be a battery module, and when at least two battery cells 2 are provided, the at least two battery cells 2 are arranged and fixed to form a battery module. The battery may also be a battery pack, which includes a case 1 and a battery cell 2, and the battery cell 2 or the battery module is accommodated in the case 1.

The battery cell 2 provided in the embodiment of the present application may include a lithium ion battery cell 2, a lithium sulfur battery cell 2, a sodium lithium ion battery cell 2, a sodium ion battery cell 2, or a magnesium ion battery cell 2, which is not limited in the embodiment of the present application. The battery cell 2 includes an electrode assembly 22 and an electrolyte, and the electrode assembly 22 includes a positive electrode tab, a negative electrode tab, and a separator. As an example, the battery cell 2 may be a cylindrical battery cell 2, a prismatic battery cell 2, a pouch battery cell 2, or other shaped battery cells 2, and the prismatic battery cell 2 includes a square-case battery cell 2, a blade-shaped battery cell 2, a polygonal-prismatic battery, such as a hexagonal-prismatic battery, etc., and the present application is not particularly limited.

The case 1 provided by the embodiment of the application can be used as a part of a chassis structure of a vehicle. For example, a portion of the tank 1 may become at least a portion of the floor of the vehicle, or a portion of the tank 1 may become at least a portion of the cross member and the side member of the vehicle. Or may be independent of the outer housing 21 as a power consumer.

The case 21 of the battery cell 2 according to the embodiment of the present application may be used to encapsulate the electrode assembly 22 and the electrolyte. The shell 21 may 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. In addition, in some embodiments, the case 21 is provided with an opening, and the end cap in the battery cell 2 closes the opening to form a closed space for accommodating the electrode assembly 22 and the electrolyte, etc. The housing 21 may be provided with one or at least two openings.

The shape of the cross section of the accommodating groove 211 in the embodiment of the present application along the direction perpendicular to the height direction of the battery cell 2 may be triangle, circular arc, semi-ellipse, polygon, etc.; the receiving groove 211 may penetrate the entire housing 21 or may not penetrate the housing 21, such as the receiving groove 211 is located at a middle position of the housing 21. The extending direction of the accommodating groove 211 is not limited, either, for example, the extending direction of the accommodating groove 211 coincides with the height direction of the battery cell 2 or the extending direction of the accommodating groove 211 is along the radial direction of the battery cell 2. The number of the accommodating grooves 211 may be one, or at least two accommodating grooves 211, for example, at least two accommodating grooves 211 may be spaced apart in the circumferential direction of the housing 21.

The cross section of the positioning beam 3 in the embodiment of the application along the direction perpendicular to the width direction of the accommodating groove 211 can be quadrilateral, circular, elliptical and the like, and the positioning beam can be matched with the accommodating groove 211 for limiting; here, the width direction of the accommodating groove 211 refers to a direction parallel to a plane in which the accommodating groove 211 is perpendicular to its own extending direction. In addition, the positioning beam 3 can be linear or curved; the positioning beam 3 may be a solid structure or a hollow structure. The positioning beam 3 may be made of aluminum, plastic, composite metal, etc., and is not particularly limited.

The fixing mode of the positioning beam 3 and the box body 1 can be that the positioning beam 3 is clamped and welded with the box body 1 or is an integrated structure.

By providing the housing 21 of the battery cell 2 with the accommodation groove 211 adapted to the positioning beam 3, in this way, in a state where the positioning beam 3 is fixed to the case 1, the accommodation groove 211 and the positioning beam 3 can be restricted from moving relatively in the width direction of the accommodation groove 211 by the engagement of the accommodation groove 211 and the positioning beam 3, thereby preventing the battery cell 2 from moving relatively in the width direction of the accommodation groove 211 with respect to the case 1. So, when holding two at least battery monomer 2 in box 1, the fixed locating beam 3 of accessible box 1 is spacing with the holding groove 211 of battery monomer 2 mutually support, improves the assembly efficiency of battery, and just because of need not set up too much fixed gluey spacing relative motion between the battery monomer 2 between battery monomer 2 for battery assembly cost is lower, still can avoid influencing the stability of battery because of fixed gluey drops simultaneously. Therefore, the application has the advantages of good battery stability, high assembly efficiency and low cost.

In the embodiment of the present application, referring to fig. 1, 2 and 4, for convenience of explanation, the length direction of the battery cell 2 is the X direction, the width direction of the battery cell 2 is the Y direction, and the height direction of the battery cell 2 is the Z direction. The height direction of the battery cell 2 may refer to a direction perpendicular to a plane in which the end cap of the battery cell 2 is located.

In the embodiment of the present application, as shown in fig. 1 and 4, the battery cell 2 includes an electrode assembly 22 disposed in a case 21, a receiving groove 211 is formed by recessing a sidewall of the case 21 toward the electrode assembly 22, and a gap is formed between a sidewall of the receiving groove 211 toward the electrode assembly 22 and the electrode assembly 22.

In the above embodiment, since the accommodating groove 211 is formed by the side wall of the case 21 concavely toward the electrode assembly 22, a gap is provided between the side wall of the accommodating groove 211 facing the electrode assembly 22 and the electrode assembly 22 in view of avoiding interference of the side wall forming the accommodating groove 211 to the electrode assembly 22. Here, compared to providing the protruding structure on the sidewall of the case 21, and further providing the receiving groove 211 on the protruding structure, the space occupied by the battery can be saved by fully utilizing the gap space between the sidewall of the case 21 and the electrode assembly 22.

For example, referring to fig. 1 and 3, the positioning beam 3 has a quadrangular cross-sectional shape along the width direction of the receiving groove 211, the receiving groove 211 has a triangular cross-sectional shape along the width direction thereof, and at least a portion of the positioning beam 3 is fitted into the receiving groove 211.

The cross section of the accommodating groove 211 along the width direction of the accommodating groove 211 is set to be of a triangular structure, and the cross section of the positioning beam 3 along the width direction of the accommodating groove 211 is of a quadrilateral design, so that the accommodating groove 211 and the positioning beam 3 are matched with each other more tightly and are not easy to fall out, and the stability of battery assembly is improved.

For example, referring to fig. 4, fig. 4 is a schematic view of the gap between the accommodating groove 211 and the electrode assembly 22 in a state where the electrode assembly 22 is provided in the case 21 of the battery cell 2. Specifically, in fig. 4, a wound electrode assembly 22 and a square casing 21 are taken as an example, the outer contour of the wound electrode assembly 22 after the electrode sheet is wound is approximately in the shape of two overlapped oblong circles, two opposite sides of the casing 21 are in the shape of two semi-circles connected, and the radius is R. The corresponding receiving groove 211 has a triangular groove in cross-sectional shape. For convenience of description, in fig. 4, the triangular groove is an isosceles right triangle accommodating groove 211, and the central axis of the isosceles right triangle is consistent with the central axis of the square housing 21, that is, the right center of the side wall of the housing 21 is provided with the triangular groove.

Since the accommodating groove 211 is formed by the concave side wall of the housing 21, that is, the accommodating groove 211 needs to extend into the housing 21, if the size of the concave amount of the accommodating groove 211 is not limited, interference with the electrode assembly 22 will tend to damage the battery cell 2; if the recess of the accommodating groove 211 is too small, a larger contact area with the positioning beam 3 cannot be ensured, so that the matching limiting effect between the two is poor. For this purpose, as shown in fig. 4, the maximum recess d of the triangular receiving groove 211 toward the inside of the housing 21 may be set toFor/>It is also understood that the high length of the bottom side of the right angle triangular receiving groove 211.

For why the relation of the maximum recess d and the radius R is set toExamples of which are illustrated below. In fig. 4, for example, between the junction of two semicircular outlines along the X-direction and the side wall of the case 21, before the accommodating groove 211 is formed, it has a space capable of accommodating the lumbar triangle grooves; when the accommodating groove 211 is concave, as is apparent from fig. 4, the two sidewalls of the waist of the accommodating groove 211 will initially abut against the electrode assembly 22, and therefore, a maximum concave d is required to avoid the sidewalls of the waist of the accommodating groove 211 from contacting the electrode assembly 22. For example, the difference between a square area region with a radius R and a quarter-circle area region with a radius R is set as D1, and D1 is/>I.e., D1 is approximately 0.2R ², it is understood that the square area must be greater than R ² in view of the inability of the electrode assembly 22 to contact the inner wall of the case 21, and accordingly, the actual difference D1 should be approximately between 0.3R ²～0.4R², i.e., half the area of the triangular groove between 0.3R ²～0.4R², and when the maximum recess D is/>Half the corresponding triangular groove area is/>I.e. between 0.3R ²～0.4R², the maximum recess d can thus be defined as/>The corresponding triangular accommodating groove 211 can avoid abutting with the electrode assembly 22, and can ensure that the triangular groove has the largest possible sectional area, so that the contact area with the positioning beam 3 can be increased, and the stability of the battery can be improved.

It should be noted that the example shown in fig. 4 is intended to illustrate that, when the cross-sectional shape of the accommodating groove 211 is a regular shape, the maximum recess d of the accommodating groove 211 can be calculated approximately from the outer contour of the electrode assembly 22. The actual shape of the outer contour of the electrode assembly 22 is varied, and the shape of the receiving groove 211 may be irregular, which is merely an ideal estimated value, in particular, to ensure that the receiving groove 211 has a larger recess as much as possible without interfering with the electrode assembly 22.

For example, in some embodiments, referring to fig. 4, the minimum gap D between a sidewall of the receiving groove 211 facing the electrode assembly 22 and the electrode assembly 22 is greater than 0 and less than or equal to 0.3mm.

Since the clearance space formed between the electrode assembly 22 in the case 21 and the inner wall of the case 21 is limited, when the accommodating groove 211 is recessed into the clearance space, the clearance space can be utilized as much as possible while ensuring that a side wall of the accommodating groove 211 facing the electrode assembly 22 does not interfere with the electrode assembly 22. For this reason, setting the minimum gap D between the side wall of the accommodation groove 211 facing the electrode assembly 22 and the electrode assembly 22 to be in the range of greater than 0 and less than or equal to 0.3mm, on the one hand, interference of the accommodation groove 211 with the electrode assembly 22 can be avoided; on the other hand, the above minimum gap D range may be a space left allowable considering that the electrode assembly 22 approaches the accommodating groove 211 due to thermal expansion.

In some embodiments, the cross-sectional shape of the positioning beam 3 along the width direction of the accommodating groove 211 is circular, the cross-sectional shape of the accommodating groove 211 along the width direction thereof is circular arc-shaped, and at least part of the positioning beam 3 is fitted in the accommodating groove 211.

The circular arc-shaped accommodating groove 211 and the corresponding cross section are circular, so that the contact area between the shell 21 of the battery cell 2 and the positioning beam 3 can be relatively increased, and the limiting stability between the battery cell 2 and the positioning beam 3 is improved.

In some embodiments, referring to fig. 1, the positioning beam 3 is linear, and the accommodating groove 211 is a linear groove.

For the linear type positioning beam 3 in the embodiment of the application, the cross-sectional shape and the size of the positioning beam 3 are equal along the width direction of the accommodating groove 211 at any position of the positioning beam 3 along the self extending direction; for any position of the accommodating groove 211 in the embodiment of the present application in the self-extending direction, the sectional shape and size of the accommodating groove 211 in the width direction thereof are equal.

The above design, because the linear type locating beam 3 and the linear type accommodating groove 211 have simple and compact structure, the cooperation between the battery monomers 2 is convenient, so as to improve the battery assembly efficiency, and meanwhile, the battery monomers 2 can be conveniently assembled or disassembled in the box body 1 along the extending direction of the locating beam 3 because the accommodating groove 211 and the locating beam 3 have no limiting effect along the extending direction of the locating beam 3.

In some embodiments, the positioning beam 3 may be curved, and the receiving groove 211 is a curved groove to prevent displacement between the positioning beam 3 and the battery cell 2 in a direction parallel to the extension direction of the positioning beam 3 itself.

In the embodiment of the application, the positioning beam 3 is provided with at least one protruding part along the width direction of the accommodating groove 211, and the at least one protruding part is matched in the accommodating groove 211 so as to prevent the displacement between the positioning beam 3 and the battery cell 2 along the direction parallel to the extending direction of the positioning beam 3.

In the above embodiment, since the positioning beam 3 is curved and is matched with the curved accommodating groove 211 on the basis of preventing the displacement between the positioning beam 3 and the battery cell 2 along the width direction of the accommodating groove 211, the relative movement between the positioning beam 3 and the battery cell 2 along the extending direction of the accommodating groove 211 is also prevented, thereby further improving the stability of the battery.

Referring to fig. 1, the extending direction of the receiving groove 211 coincides with the height direction of the battery cell 2.

Here, since the height direction of the battery cell 2 is generally perpendicular to the plane where the bottom wall of the case 1 is located, and the end of the battery cell 2 in the height direction is generally provided with an end cap assembly, the design that the extending direction of the accommodating groove 211 is consistent with the height direction of the battery cell 2 can prevent the positioning beam 3 from touching the relevant parts on the battery cell 2.

In some embodiments, referring to fig. 1 and 2, the accommodating groove 211 penetrates the housing 21 along its extending direction.

The design is convenient for the battery monomer 2 to be matched and installed on the positioning beam 3 along the extending direction of the positioning beam 3; meanwhile, the receiving groove 211 is penetrated through the housing 21 to increase the contact area between the positioning beam 3 and the receiving groove 211, thereby improving the limit effect of the receiving groove 211 and the positioning beam 3 along the width direction of the receiving groove 211.

For example, referring to fig. 1, the battery includes at least two positioning beams 3, and the positioning beams 3 are vertically fixed on the same side of the case 1 at intervals for forming at least two battery cells 2 into a unitary array structure.

In the embodiment of the application, the positioning beam 3 can be directly fixedly connected with the box body 1, for example, the positioning beam 3 is provided with a positioning protrusion, the box body 1 is correspondingly provided with a positioning groove, and the positioning protrusion on the positioning beam 3 is matched and stretches into the positioning groove to fix the positioning beam 3; or the positioning beam 3 is directly welded on the box body 1. In addition, the case 1 may also include a support plate for mounting the positioning beam 3 and for carrying the battery cell 2, where the support plate and the case 1 may be clamped or abutted.

Above because a locating beam 3 can be at least with two adjacent battery monomer 2 cooperation spacing, under the state that at least two locating beams 3 are fixed with at least vertical interval on the same side of box 1, two at least locating beams 3 can realize the relative position between two at least battery monomer 2 fixed to make two at least battery monomer 2 form integral type array structure.

In some embodiments, the positioning beams 3 are made of a heat conducting material for transferring heat between two adjacent battery cells 2.

The heat conducting material of the positioning beam 3 of the present application may be a metal alloy material such as copper and aluminum, and is not particularly limited.

The positioning beam 3 is made of a heat conducting material, so that heat of any battery monomer 2 in limit fit with the positioning beam 3 can be transferred to the positioning beam 3, and when one positioning beam 3 is in limit fit with two battery monomers 2, the positioning beam can be used for transferring heat between the two battery monomers 2 in limit fit with the positioning beam, and therefore uniformity of temperature of the battery is improved, and heat dissipation of the battery is facilitated.

In some embodiments, referring to fig. 1, the positioning beam 3 is a hollow sealing structure, and the side wall of the positioning beam 3 is made of a heat conducting material, and the hollow sealing structure has a cooling medium therein, and the positioning beam 3 is used for transferring heat between two adjacent battery cells 2.

The side wall of the positioning beam 3 in the embodiment of the application can be made of metal alloy materials such as copper, aluminum and the like. The cooling medium can be water, mechanical oil, nitrate, polyvinyl alcohol, trinitro aqueous solution, etc.

Here, the positioning beam 3 with a hollow sealing structure and made of heat conducting materials can save the material cost of the positioning beam 3 on one hand; on the other hand, the cooling medium arranged in the hollow sealing structure can take away the heat generated in the battery, so that the heat dissipation rate of the battery is improved, and meanwhile, the positioning beam 3 is positioned between two adjacent battery monomers 2, so that the uniformity of the temperature of each part in the battery monomers 2 can be improved, and the service cycle of the battery is prolonged.

In some embodiments, a heat conducting layer is filled between the positioning beam 3 and the accommodating groove 211, and the heat conducting layer is used for transferring heat between the housing 2 and the positioning beam 3.

Because a gap is inevitably formed between the positioning beam 3 and the accommodating groove 211 when the positioning beam 3 and the accommodating groove 211 are matched, and the gap between the positioning beam 3 and the accommodating groove 211 can be filled by filling the heat conducting layer, the positioning beam 3 and the accommodating groove 211 are matched more tightly, and shaking between the positioning beam 3 and the shell 2 is reduced to a great extent. In addition, the heat conducting layer with heat conducting function is filled between the positioning beam 3 and the accommodating groove 211, so that the heat dissipation rate of the battery can be further improved.

In some embodiments, referring to fig. 1, 2 and 3, the housing 2 includes a first side wall provided with the accommodating groove 211 and a second side wall 212 not provided with the accommodating groove 211, the first side wall and the second side wall 212 are made of different materials, and the thermal conductivity of the first side wall provided with the accommodating groove 211 is greater than that of the second side wall 212.

In the embodiment of the present application, referring to fig. 3, a first sidewall of the accommodating groove 211 is shown by a grid line, and a second sidewall 212 without the accommodating groove 211 is not shown by a grid line, so as to distinguish the first sidewall with the accommodating groove 211 from the second sidewall 212 without the accommodating groove 211, and to show that the first sidewall and the second sidewall 212 are two structures with different materials.

In the embodiment of the application, the box body 1 can also comprise a liquid cooling plate positioned at the top of the battery cell 2, and the liquid cooling plate can be used for sealing and further limiting the battery cell 2 on one hand and can also improve the heat dissipation speed of the battery and the uniformity of the temperature of each part of the battery. In addition, the supporting plate for carrying the battery unit 2 and for mounting the positioning beam 3 can also be configured as a liquid cooling plate, so as to further improve the heat dissipation speed of the battery.

In some embodiments, referring to fig. 1 and 2, at least two receiving grooves 211 are provided on each housing 21.

Wherein, the arrangement of at least two accommodating grooves 211 on each shell 21 can facilitate the assembly of at least two battery monomers 2 into a plurality of batteries arranged in an array through the positioning beam 3; on the other hand, the stability of the battery can be improved.

For example, referring to fig. 1 and 2, the housing 21 is a square housing 21, two opposite side walls of the square housing 21 are respectively provided with a receiving groove 211, two receiving grooves 211 aligned on two adjacent square housings 21 are correspondingly spliced to form a receiving space, and the positioning beam 3 is located in the receiving space.

Because the casing 21 is square casing, and all be provided with the holding groove 211 on two opposite lateral walls, in two adjacent square casings, can splice into a accommodation space when the holding groove 211 of one square casing and the holding groove 211 of another square casing correspond the setting, and the locating beam 3 that is located in this accommodation space can be with two battery monomers 2 adjacent to it spacing into a whole along the width direction of holding groove 211. Therefore, two opposite ends of one positioning beam 3 can be matched with and limited with two battery monomers 2, so that the assembly efficiency of the battery is improved. For example, referring to fig. 1, a positioning beam 3 may be used to position at least two battery cells 2, and by providing at least two positioning beams 3 that are distributed at intervals, at least two battery cells 2 in fig. 1 form a battery pack with four rows and three columns. In addition, the number and the interval of the positioning beams 3 can be changed, so that at least two battery cells 2 can be assembled into a required battery pack or a required battery module according to the requirement.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. 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.

Claims (17)

1. A battery, comprising:

A case;

the battery unit comprises a shell, and a containing groove is formed in the shell;

The positioning beam is fixed with the box body and is adapted in the accommodating groove so as to prevent displacement between the positioning beam and the battery cell along the width direction of the accommodating groove.

2. The battery of claim 1, wherein the battery cell comprises an electrode assembly disposed within the housing, the receiving groove is recessed from a sidewall of the housing toward the electrode assembly, and a gap is provided between the electrode assembly and a sidewall of the receiving groove toward the electrode assembly.

3. The battery of claim 2, wherein a minimum gap between a side wall of the receiving groove facing the electrode assembly and the electrode assembly is greater than 0 and less than or equal to 0.3mm.

4. A battery according to any one of claims 1 to 3, wherein the positioning beam has a circular cross-sectional shape in the width direction of the receiving groove, the receiving groove has a circular arc cross-sectional shape in the width direction thereof, and at least part of the positioning beam is fitted into the receiving groove.

5. A battery according to any one of claims 1 to 3, wherein the positioning beam has a quadrangular cross-sectional shape in the width direction of the receiving groove, the receiving groove has a triangular cross-sectional shape in the width direction thereof, and at least part of the positioning beam is fitted in the receiving groove.

6. A battery according to any one of claims 1 to 3, wherein the positioning beam is linear and the receiving groove is a linear groove.

7. A battery according to any one of claims 1 to 3, wherein the positioning beam is curved, and the receiving groove is a curved groove to prevent displacement between the positioning beam and the battery cell in a direction parallel to the direction in which the positioning beam itself extends.

8. A battery according to any one of claims 1 to 3, wherein the extending direction of the accommodating groove coincides with the height direction of the battery cell.

9. A battery according to any one of claims 1 to 3, wherein the accommodation groove penetrates the case in the direction of extension of the accommodation groove itself.

10. A battery according to any one of claims 1 to 3, wherein the battery comprises at least two of the positioning beams, the positioning beams being vertically spaced apart and fixed on the same side of the housing for forming at least two of the battery cells into a unitary array structure.

11. A battery according to any one of claims 1 to 3, wherein the positioning beams are of a thermally conductive material for transferring heat between adjacent ones of the battery cells.

12. A battery according to any one of claims 1 to 3, wherein the positioning beams are hollow sealing structures, the side walls of the positioning beams are made of heat conducting materials, cooling media are arranged in the positioning beams, and the positioning beams are used for transferring heat between two adjacent battery cells.

13. The battery of claim 11, wherein a thermally conductive layer is filled between the positioning beam and the receiving groove, the thermally conductive layer being for transferring heat between the housing and the positioning beam.

14. The battery according to any one of claims 1 to 3, wherein the case includes a first side wall provided with the accommodating groove and a second side wall not provided with the accommodating groove, the first side wall and the second side wall are of different materials, and a thermal conductivity of the first side wall is larger than a thermal conductivity of the second side wall.

15. A battery according to any one of claims 1 to 3, wherein at least two of the receiving grooves are provided on each of the cases.

16. The battery according to claim 15, wherein the housing is a square housing, the two opposite side walls of the square housing are respectively provided with the accommodating grooves, two accommodating grooves which are arranged in an aligned manner on two adjacent square housings are correspondingly spliced to form an accommodating space, and the positioning beam is positioned in the accommodating space.

17. An electrical device, comprising:

The battery of any one of claims 1 to 16 for providing electrical energy.