CN217134526U - Section bar for battery pack, lower box frame, battery pack and electric device - Google Patents

Abstract

The application relates to the technical field of power batteries, in particular to a section for a battery pack, a lower box body frame, the battery pack and an electric device. The section of the section bar for the battery pack is provided with a frame-shaped main body, the left side of the top surface of the frame-shaped main body is provided with a bearing surface, the right side of the bearing surface is provided with an upper convex part, and the left side of the bottom surface of the frame-shaped main body is provided with a first inner concave part. The utility model discloses when guaranteeing the intensity requirement to simpler, processing is more convenient, the lighter structure of weight makes the section bar possess the performance of location battery package subassembly, improvement battery package leakproofness, has satisfied the requirement of new energy automobile to lightweight, security performance.

Description

Section bar, lower box frame, battery package and electric installation for battery package

Technical Field

The application relates to the technical field of power batteries, in particular to a section for a battery pack, a lower box body frame, the battery pack and an electric device.

Background

The endurance mileage of electric vehicles has been one of the major concerns, and the adoption of high specific energy and lightweight battery systems is undoubtedly an effective and direct way to improve endurance. Three approaches are generally provided for realizing the light weight of the battery system, so that the energy density of a single battery cell is improved, the quality of accessories of the battery system is reduced, and the design of the battery system is optimized. Most of the existing battery box bodies adopt battery pack frameworks prepared from aluminum alloy, and the battery pack frameworks have the defects of large volume, thick material and high weight, are not beneficial to low-cost and large-batch manufacturing, and seriously restrict the improvement of the energy density of a power battery. The volume utilization rate and the mechanical performance of the power battery box are in contradiction, and on the premise that the accommodating space is not changed, the higher volume utilization rate means that the narrower box structure can be designed into a space and a thinner framework structure, so that the battery system has the requirements on rigidity and strength to meet the complex working conditions of collision, impact, vibration bump, extrusion, bottom stone impact and the like which may occur in the service process is undoubtedly a great technical difficulty.

SUMMERY OF THE UTILITY MODEL

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The utility model provides a to above-mentioned problem, provide a section bar, lower box frame, battery package and power consumption device for battery package, can solve current battery package box aluminum alloy skeleton bulky, the material is thick, the weight is high, be unfavorable for low-cost, manufacturing in batches, seriously restrict the problem of the promotion of power battery energy density.

In a first aspect, the application provides a section for a battery pack, the section of the section is provided with a frame-shaped main body, the left side of the top surface of the frame-shaped main body is provided with a bearing surface, the right side of the bearing surface is provided with an upper convex part, and the left side of the bottom surface of the frame-shaped main body is provided with a first inner concave part.

In the technical scheme of this application embodiment, the cross-section main part of section bar for the battery package is the frame shape, can reduce the processing degree of difficulty as the simpler major structure of section bar, reduces the cost of generation. The top surface of the frame-shaped main body is provided with the upper convex part, the upper convex part is arranged on the top surface of the frame-shaped main body, and the top cover or the battery cell module can be stopped by the upper convex part to be limited after falling on the bearing surface of the frame-shaped main body, so that the fixing effect is achieved. The left side of the bottom surface of the frame-shaped main body is provided with a first concave part for arranging a sealing gasket, and sealing is realized by virtue of pressing force between the sectional material and the water cooling plate.

In some embodiments, a second concave portion is provided on the right side of the bottom surface of the frame-shaped body. The second concave part is used for limiting the position between the section bar and the electric device, so that the structure is more stable after the battery pack is installed.

In some embodiments, the frame-shaped body comprises a first mould plate, a first end edge of the first mould plate is bent inwards and then contacts with the middle part of the first mould plate to form a first mould cavity, and a second inner concave part is formed between the first mould cavity and the bottom surface of the frame-shaped body. The structural strength of the middle part of the section is strengthened by the inward-rolling structure of the first end edge of the first shaping plate.

In some embodiments, the first end edge comprises a first folded-out end portion that is folded out, the first folded-out end portion contacting the first template middle portion. The first outer-folding end part and the first template inner-folding part form a supporting structure similar to a Z shape, and the effect of improving the structural strength of the middle part of the first template is better.

In some embodiments, the second template, the both ends limit of second template is connected with second end limit and the first die cavity of first template respectively, and first concave part locates second template bottom surface. In this application embodiment, thereby increased the second template and be used for cooperating the main part of group's section bar with first template, reduced the manufacturing degree of difficulty of single part through modular structure, come out alone the load position of section bar bottom simultaneously, be convenient for strengthen it, improve the atress advantage of section bar.

In some embodiments, the second form includes a second folded-out end portion that is folded out, the second folded-out end portion being connected with the first cavity. The second outer folding end part increases the supporting area of the second template to the first template, so that the contact surface of the first template and the second template is less prone to stress deformation, and the overall anti-deformation performance of the profile is better.

In some embodiments, a third template is provided, two end edges of the third template are respectively connected with the first template to form a third cavity, and the upper convex part is formed by the third template. In this application embodiment, through the upper convex part of third template as the section bar, the differentiation has reduced the holistic preparation degree of difficulty of section bar, and solitary subassembly structural strength is higher simultaneously.

In some embodiments, the first form, the second form, and the third form are each stamped or rolled long sections. First template, second template and third template among this application technical scheme all are the part that can make through punching press or roll-in, and the roll-in section bar is frivolous, and intensity is high.

In a second aspect, the present application provides a lower case frame of a battery pack, wherein the frame is prepared by using a plurality of profiles for the battery pack in the above embodiments. After the section bar is used for the battery box body, the relationship among the strength, the volume and the mass of the battery box body can be optimized to the greatest extent, and the technical effects of small volume, light mass and high strength are achieved.

In some embodiments, a plurality of stiffening beams are arranged in the lower box frame, and a plurality of battery cell module placing seats separated by the stiffening beams are arranged in the lower box frame. In this application embodiment, the section bar can also cooperate the use of stiffening beam, obtains to have more electric core modules and places the lower box frame of seat.

In some embodiments, the connections between the profiles, and the reinforcing beams comprise welds. In the embodiment of the application, the strength material of box generally adopts the metal material under in order to improve, all can connect through convenient welding process between each part, and the product wholeness is good.

In a third aspect, the present application provides a battery pack, including the lower case frame of the battery pack in the above embodiments, the battery pack is provided with a top cover, a lower case frame, a water cooling plate and a bottom guard plate from top to bottom in sequence. The lower box body frame of the battery pack with the profile structure in the embodiment can be well assembled with other components of the battery pack, and the battery pack is compact in overall structure and good in sealing effect.

In a fourth aspect, the present application provides an electric device including the battery pack in the above embodiments. The battery pack prepared by the sectional material of the embodiment can be well applied to most electric devices, and has wide application range and high market value.

Through adopting foretell technical scheme, the beneficial effect of this application is:

(1) the utility model provides a section bar structure, its cross-section includes the frame-shaped main part, and the left side of frame-shaped main part top surface is equipped with the loading end, and the right side of loading end is equipped with the convex part, and the left side of frame-shaped main part bottom surface is equipped with first interior concave part. Different with current battery package skeleton utilization aluminum alloy structure, the section bar that this application provided when guaranteeing the strength requirement to simpler, processing is more convenient, lighter structure makes the section bar possess the performance of location battery package subassembly, improvement battery package leakproofness, has satisfied new energy automobile to lightweight, security performance's requirement.

(2) The utility model provides a pair of box frame under battery package utilizes the roll-in section bar in the above-mentioned embodiment, and it not only has the advantage characteristic of general roll-in section bar, simultaneously owing to adopt the component structure of combination formula to reduce the manufacturing degree of difficulty of single part, and the structural design of block ization, the differentiation at the key position of being more convenient for is strengthened.

(3) Through the design of the local Z-shaped supporting structure and the reverse outward-folded end part, the integral bearing capacity and the deformation resistance of the profile structure are enhanced, and the defect that the interior of a traditional profile cavity is lack of support is overcome.

(4) Compared with the traditional battery pack, the battery pack framework formed by splicing the sectional materials has the advantages of light weight, high structural strength and simplicity and convenience in processing, and is reasonable in structure and good in energy-absorbing and anti-fracture performance.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Clearly, such objects and other objects of the present application will become more apparent after a detailed description of the preferred embodiments thereof as illustrated in the various figures and drawings.

These and other objects, features and advantages of the present application will become more apparent from the following detailed description of one or more preferred embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application.

In the drawings, like parts are designated with like reference numerals, and the drawings are schematic and not necessarily drawn to scale.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one or several embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to such drawings without creative efforts.

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

FIG. 2 is a first cross-sectional view of a battery pack profile according to some embodiments of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a second profile for a battery pack according to some embodiments of the present disclosure;

fig. 4 is a schematic structural view of a lower case frame of a battery pack according to some embodiments of the present application;

fig. 5 is an exploded view of a battery pack according to some embodiments of the present application.

Description of the main reference numerals:

1 a frame-shaped body;

11 a bearing surface; 12 an upper convex part; 13 a first concave portion; 14 a second concave portion;

2 a first template;

21 a first cavity; 22 a first folded-over end portion; 23 supporting a structure;

3 a second template;

31 a second folded-out end;

4 a third template;

5, a battery pack;

51 a top cover; a 52 cell module;

53 lower case frame;

531 front beam; 532 back beam; 533 a left side beam; 534 right side beam; 535 a reinforcing beam; 536 a battery cell module placing seat;

54 water-cooled plates; 55 bottom guard board.

6, a power utilization device;

7 vehicles;

71 a controller; 72 motor.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

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

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, 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 otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

A pure electric vehicle refers to a vehicle type driven only by electric power, in which the electric power is stored in a battery pack. In view of the current energy density of the battery pack and the endurance requirement of the automobile, the battery pack usually has several hundred kilograms. As the battery pack is added to the electric vehicle, the weight of the whole electric vehicle is increased, and more fine design of the original vehicle body structure is required. At present, the weight of a battery pack system accounts for more than 20% of the whole vehicle, the cost of the battery pack system accounts for 30% -60% of the whole vehicle, and the new energy vehicle needs to be lighter than the traditional vehicle. All of the above steps bring great challenges to the development of new energy vehicles with reduced weight.

The battery pack box body is used as a bearing and protecting mechanism of the power battery, and occupies an important position in a battery pack system, the preparation quality of the battery pack box body is larger at present, and a larger light-weight space is provided, and meanwhile, the requirement of the policy on the energy density of the battery pack is gradually improved, so that the battery pack box body is highly urgent in light development.

In activities such as light-weight special conferences and automobile light-weight forums held in the last few years, light-weight metal and nonmetal material suppliers, composite material suppliers, light-weight advanced process equipment suppliers, core part suppliers, 3D printing and simulation equipment suppliers, core technology suppliers and other tradesmen deeply discuss the current situation and trend of light-weight technology at home and abroad, technical breakthroughs and difficulties, future development and operation modes and the like.

At present, the development and development directions of the prior art are 3D printing power-assisted structure optimization and additive manufacturing, application of carbon fiber composite materials in automobile light weight, application and light weight of non-metal materials in automobile NVH, light weight of commercial automobile aluminum alloy, light weight design of high-energy power batteries, light weight-polymer composite materials of various automobile parts and application thereof, thermoplastic plastic technology with brand-new breakthrough in light weight, power-assisted light weight upgrading through an intelligent laser welding technology, and the like.

In the process of carrying out light weight design on the battery pack around the research and development directions, the inventor notices that the framework structure optimization of the battery pack also has a great improvement prospect, the framework structures of the existing battery packs are all rough, and the reason is to ensure the protection effect of the battery pack so as to avoid the damage of the battery pack caused by impact when a vehicle collides, and the battery pack has the defects of large volume, thick material, heavy weight and high cost.

In view of the above, in order to solve the balance between the strength and the weight of the battery pack frame, the applicant has found that the frame structure can be formed by a combined structure. The framework is formed by bundling at least two sectional materials, so that the problem that the processing difficulty of the framework is increased due to the fact that an energy absorption structure is added is solved, gradient type buffering is provided for the collision process, the fracture resistance of the framework is improved, and a better protection effect is achieved.

The section bar for the battery pack disclosed by the embodiment of the application can be used for manufacturing frame components of single batteries, battery packs, battery modules, electric devices and the like, and is beneficial to solving the problems of light weight, strength and the like of the section bar for the battery pack.

The lower box frame structure for the battery pack disclosed by the embodiment of the application can be used in battery devices such as battery monomers, battery packs, battery modules and power devices, can be used for forming the power devices or power systems of the battery devices by using the lower box frame for the battery pack disclosed by the application, and is favorable for the problems of light weight, strength and the like of sectional materials for the battery pack.

The battery pack disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto, and a power supply system comprising the battery cells, batteries and the like disclosed in the application can be used, so that the battery pack is beneficial to light weight and improvement of energy density, and stability and safety of battery performance and battery service life are improved.

The embodiment of the application provides an electric device using a battery as a power source, wherein the electric device can be but is not limited to an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of explanation, the following embodiments are provided by taking the vehicle 7 as the electric device 6 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electric device 6 according to some embodiments of the present disclosure.

The electric device 6 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and other vehicles 7. The battery pack 5 is provided inside the power consumption device 6. The battery pack 5 may be used for power supply of the electric device 6, for example, the battery pack 5 may serve as an operation power source of the electric device 6. The electric device 6 may further comprise a controller 71 and a motor 72, the controller 71 being configured to control the battery pack 5 to supply power to the motor 72, for example, for start-up, navigation and operational power requirements of the electric device 6 during driving.

In some embodiments of the present application, the battery pack 5 may be used not only as an operation power source for the electric device 6, but also as a driving power source for the electric device 6, instead of or in part of fuel or natural gas, to provide driving power for the electric device 6.

The battery pack 5 includes a case and a battery cell accommodated in the case. Wherein, the box is used for providing accommodation space for battery monomer, and the box can adopt multiple structure. In some embodiments, the case may include a first portion and a second portion that cover each other, and the first portion and the second portion together define a receiving space for receiving the battery cell. The second part can be a hollow structure with one open end, the first part can be a plate-shaped structure, and the first part covers the open side of the second part, so that the first part and the second part jointly define an accommodating space; the first part and the second part can be hollow structures with one side opened, and the opening side of the first part is covered on the opening side of the second part. Of course, the box formed by the first and second portions may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery pack 5, a plurality of battery cells may be provided, and a plurality of battery cells may be connected in series or in parallel or in series-parallel, where in series-parallel refers to that a plurality of battery cells are connected in series or in parallel. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers is accommodated in the box body; certainly, the battery pack 5 may also be a battery module formed by connecting a plurality of battery cells in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole and are accommodated in the box. The battery pack 5 may further include other structures, for example, the battery pack 5 may further include a bus member for achieving electrical connection between the plurality of battery cells.

Wherein each battery pack 5 may be a lithium ion secondary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery pack 5 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 5, fig. 5 is an exploded view of the battery pack 5 according to some embodiments of the present disclosure. The battery pack 5 comprises a top cover 51, a battery cell module 52, a lower box frame 53, a water cooling plate 54 and a bottom guard plate 55 which are arranged from top to bottom in sequence.

Referring to fig. 2, fig. 2 is a first schematic cross-sectional structural view of a profile for a battery pack 5 according to some embodiments of the present disclosure.

According to some embodiments of the present application, the present application provides a profile for a battery pack 5, optionally, the profile has a frame-shaped body 1 in cross section, a bearing surface 11 is disposed on the left side of the top surface of the frame-shaped body 1, an upper convex portion 12 is disposed on the right side of the bearing surface 11, and a first concave portion 13 is disposed on the left side of the bottom surface of the frame-shaped body 1.

The section for the battery pack 5 is a section which can be used as a battery pack framework, has a certain section shape, and can be prepared by extrusion, injection molding, rolling, stamping and other forming processes; the frame-shaped main body 1 is a main shape element of the section, and is a structure which is formed by adding lines around a midpoint to form constraint, such as a polygon, a C shape, an O shape or other irregular enclosing shapes; the bearing surface 11 is a part of the sectional material for bearing the article; the upper convex part 12 is a blocking part for limiting the object on the bearing surface 11 to move towards one side; the first concave portion 13 is formed in a stepped or recessed portion in the bottom surface of the frame-shaped body 1 for accommodating a mounting gasket. In the technical scheme of this application embodiment, the cross-section main part of battery package 5 is the frame shape with the section bar, can reduce the processing degree of difficulty as the simpler major structure of section bar, reduces the cost of generation. The top surface of the frame-shaped main body 1 is provided with the upper convex part 12, the upper convex part 12 is arranged on the top surface of the frame-shaped main body 1, and the top cover 51 or the battery cell module 52 can be stopped and limited by the upper convex part 12 after falling on the bearing surface 11 of the frame-shaped main body 1, so that a fixing effect is achieved. The left side of the bottom surface of the frame-shaped body 1 is provided with a first concave part 13 for providing a sealing gasket, which is sealed by the pressing force between the profile and the water-cooled plate 54.

Referring to fig. 3, fig. 5 is a schematic cross-sectional structure diagram of a profile for a battery pack 5 according to some embodiments of the present application.

According to some embodiments of the present application, optionally, the right side of the bottom surface of the frame-shaped body 1 is provided with a second concave portion 14. The second concave part 14 is used for limiting the position between the section bar and the electric device 6, so that the structure of the battery pack 5 is more stable after the battery pack is installed.

The second concave portion 14 is another step or groove formed on the bottom surface of the frame-shaped body 1 for snap-fitting positioning between the battery pack 5 and any right-angled edge of the power consuming device 6.

According to some embodiments of the present application, optionally, please refer to fig. 3 again, which includes a first mold plate 2, a first end edge of the first mold plate 2 is bent inward and contacts with a middle portion of the first mold plate 2 to form a first cavity 21, and a second concave portion 14 is formed between the first cavity 21 and a bottom surface of the frame-shaped body 1. The first shaping plate 2 is one of the components forming the frame-shaped main body 1, the first end edge is a part from the bending part of the side section of the first shaping plate 2 to the end part, the first cavity 21 is formed by bending the first end edge of the first shaping plate 2 inwards, and the structural strength of the middle part of the section is strengthened through the inward-rolling structure of the first end edge of the first shaping plate 2, namely the first cavity 21.

According to some embodiments of the present application, optionally, with continued reference to fig. 3, the first end edge comprises a first folded-out end portion 22 folded outwards, and the first folded-out end portion 22 contacts with the middle portion of the first shaping plate 2. The first folded end 22 is a portion having a bending direction opposite to the inward bending direction of the first end edge, i.e. an outward bending angle is formed at the tail of the first end edge, and the first folded end is connected to the middle of the first shaping plate 2 to perform a reverse supporting function. The first folded-out end part 22 and the folded-in part of the first template 2 form an approximately Z-shaped supporting structure 23, and the effect of improving the middle structural strength of the first template 2 is better.

According to some embodiments of the present application, optionally, referring to fig. 3, the second mold plate 3, two end edges of the second mold plate 3 are respectively connected with the second end edge of the first mold plate 2 and the first cavity 21, and the first concave portion 13 is disposed on the bottom surface of the second mold plate 3.

The second profile 3 is one of the components constituting the frame-shaped body 1, and the second end edge is a portion of the first profile 2 remote from the first end edge.

In this application embodiment, thereby increased second template 3 and be used for cooperating the main part of group's section bar with first template 2, reduced the manufacturing degree of difficulty of single part through modular structure, come out alone the load position of section bar bottom simultaneously, be convenient for strengthen it, improve the atress advantage of section bar.

According to some embodiments of the present application, optionally, referring to fig. 3, the second mold plate 3 includes a second folded end 31 bent outward, and the second folded end 31 is connected to the first mold cavity 21. The second outer folding end part 31 is a folding angle which is formed at the tail part of one side of the second template 3 and is folded outwards, the second outer folding end part 31 increases the supporting area of the second template 3 to the first template 2, so that the contact surface of the first template 2 and the second template 3 is not easy to deform due to stress, and the whole anti-deformation performance of the section bar is better.

According to some embodiments of the present application, optionally, with reference to fig. 3, a third mold plate 4 is formed, two end edges of the third mold plate 4 are respectively connected to the first mold plate 2 to form a third cavity, and the upper protrusion 12 is formed by the third mold plate 4.

The third shaping plate 4 is one of the components forming the frame-shaped main body 1, and the third cavity is established outside other cavities of the frame-shaped main body 1, so that the problems of overlong side length of the cavity and reduced deformation resistance are avoided.

In the embodiment of the application, the third template 4 is used as the upper convex part 12 of the profile, so that the overall manufacturing difficulty of the profile is reduced, and the structural strength of the independent component is higher.

According to some embodiments of the present application, optionally with continued reference to fig. 1-3, the first form 2, the second form 3, and the third form 4 are each long profiles that are stamped or rolled. Stamping or rolling is a general pressure forming method of the section. First template 2, second template 3 and third template 4 among this application technical scheme all are the part that can make through punching press or roll-in, and the roll-in section bar is frivolous, and intensity is high. Specifically, the first shaping plate 2 is an at least five-folded long section with a cross section similar to a zigzag shape, and the second shaping plate 3 is an at least three-folded long section with a cross section similar to a spoon shape. The third template 4 is an at least four-fold long profile with an approximately inverted-V-shaped section.

Referring to fig. 4, fig. 4 is a schematic structural view of a lower case frame 53 of the battery pack 5 according to some embodiments of the present disclosure.

According to some embodiments of the present application, there is provided a lower case frame 53 of a battery pack 5, which is prepared by using a plurality of the above-mentioned embodiments of the section bar for the battery pack 5. The lower case frame 53 is a main skeleton structure of the battery pack. Specifically, the lower casing frame 53 includes an outer frame composed of a front beam 531, a rear beam 532, a left side beam 533, and a right side beam 534. The front beam 531 and the rear beam 532 are made of the section bar for the battery pack 5 in the above embodiment. After the section bar is used for the battery box body, the relationship among the strength, the volume and the mass of the battery box body can be optimized to the greatest extent, and the technical effects of small volume, light mass and high strength are achieved.

According to some embodiments of the present application, optionally, with continued reference to fig. 4, several reinforcing beams 535 are disposed in the lower box frame 53, and the reinforcing beams 535 include a first reinforcing beam 535, a second reinforcing beam 535, a third reinforcing beam 535, a fourth reinforcing beam 535, and a fifth reinforcing beam 535. The reinforcing beam 535 is provided in the lower casing frame 53, and is connected to the frame of the lower casing frame 53 to support the same. The first stiffening beam 535 of the seat 536 is placed to the fifth reinforcing beam 535 to the electricity core module 52 as required and the seat quantity sets up, and the central zone in the lower box frame 53 is equipped with 6 electricity core modules that are separated by the stiffening beam 535 and form and places the seat 536 for place six electricity core modules 52, electricity core module 52 splice in the water-cooling upper plate. In the embodiment of the present application, the profile may also cooperate with the reinforcing beam 535, so as to obtain the lower box frame 53 having more cell modules 52.

According to some embodiments of the present application, optionally, with continued reference to FIG. 4, the connections between the profiles, and between the profiles and the reinforcement beam 535 comprise welds.

The connection among the first template 2, the second template 3 and the third template 4 is arranged between the templates, the connection among the profiles is arranged between the profiles for the battery pack 5 in the lower box body frame 53, and the connection among the profiles is arranged between the profiles for the battery pack 5 and the first to fifth reinforcing beams 535.

In the embodiment of the application, the strength material of box generally adopts the metal material under in order to improve, all can connect through convenient welding process between each part, and the product wholeness is good.

Referring to fig. 5, fig. 5 is an exploded view of the battery pack 5 according to some embodiments of the present application.

According to some embodiments of the present application, the present application provides a battery pack 5, including the lower box frame 53 of the battery pack 5 in the above embodiments, the battery pack 5 is provided with a top cover 51, a battery cell module 52, a lower box frame 53, a water cooling plate 54 and a bottom protection plate 55 from top to bottom in sequence.

The battery PACK 5 is an assembled battery, and is a product which is manufactured by assembling and processing a battery core, a box body, a battery connecting sheet, label paper and the like into a product required by a client through a battery PACK process. The top cover 51 is used for sealing the battery pack 5, the battery cell module 52 is used for storing and discharging electricity, the lower box frame 53 is a main body part of the box, the water cooling plate 54 is a cooling structure of the battery pack 5, and the bottom protection plate 55 is a protection structure of the battery pack.

The periphery of the bottom guard plate 55 is provided with through holes, and the bottom guard plate is connected with the water cooling plate 54 and the lower box body frame 53 through bolts. The through holes are holes formed through the bottom protection plate 55 and the water cooling plate 54. The lower box frame 53 of the battery pack 5 with the profile structure in the embodiment can be well assembled with other components of the battery pack 5, and the battery pack 5 has a compact integral structure and a good sealing effect.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electric device 6 according to some embodiments of the present disclosure.

According to some embodiments of the present application, the present application further provides an electric device 6, which includes the battery pack 55 in any of the above embodiments, and the battery pack 55 is used for providing electric energy. Alternatively, the electricity utilization device 6 refers to a general fuel oil vehicle, a gas vehicle, a new energy vehicle, or the like.

According to some embodiments of the present application, please continue to refer to fig. 2-3, the present application provides a profile for a battery pack 5, the cross section of the profile is provided with a frame-shaped main body 1, the left side of the top surface of the frame-shaped main body 1 is provided with a bearing surface 11, the right side of the bearing surface 11 is provided with an upper convex portion 12, and the left side of the bottom surface of the frame-shaped main body 1 is provided with a first concave portion 13. The right side of the bottom surface of the frame-shaped body 1 is provided with a second concave portion 14. The frame-shaped main body 1 comprises a first template 2, a second template 3 and a third template 4, a first end edge of the first template 2 is bent inwards and then is contacted with the middle part of the first template 2 to form a first cavity 21, and a second inner concave part 14 is formed between the first cavity 21 and the bottom surface of the frame-shaped main body 1. The first end edge comprises a first folded end part 22 which is folded outwards, and the first folded end part 22 is contacted with the middle part of the first shaping plate 2. The two end edges of the second template 3 are respectively connected with the second end edge of the first template 2 and the first cavity 21, and the first concave part 13 is arranged on the bottom surface of the second template 3. The second mold plate 3 includes a second folded end 31 folded outward, and the second folded end 31 is connected to the first mold cavity 21. The two end edges of the third shaping plate 4 are respectively connected with the first shaping plate 2 to form a third cavity, and the upper convex part 12 is formed by the third shaping plate 4.

The application aims at an M1 electric automobile, and the power battery box body related to the electric automobile considers the test environment and index requirements of vibration, impact, simulated collision and extrusion specified in the national standard GB38031-2021 for power storage batteries for electric automobiles in the design stage. The front beam 531, the rear beam 532, the left side beam 533, the right side beam 534, the first to fifth reinforcing beams 535 and the bottom guard plate 55 in the embodiment can all adopt high-strength steel with the tensile limit exceeding 1000MPa, and through finite element analysis of statics and dynamics, the structural stress level of the power battery box body related by the invention does not exceed 800MPa, and meets the national standard.

Compared with the existing scheme of extruding the aluminum profile power battery box body, the invention is initiated by the structural characteristics of a high-strength steel member formed by stamping and rolling, in particular to a front beam 531, a rear beam 532, a left side beam 533, a right side beam 534, first to fifth reinforcing beams 535 and a bottom guard plate 55 in the embodiment. Because the stamping and rolling processes with high production efficiency and low production cost are adopted, the power battery box body is suitable for large-scale, low-cost and high-efficiency production and manufacture.

It is to be understood that the embodiments disclosed herein are not limited to the particular process steps or materials disclosed herein, but rather, are extended to equivalents thereof as would be understood by those of ordinary skill in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

Reference in the specification to "an embodiment" means that a particular feature or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrase or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.

Furthermore, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, certain specific details are provided, such as thicknesses, amounts, etc., to provide a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, etc.

Claims (12)

1. The utility model provides a section bar for battery package (5), its characterized in that, this section bar cross-section is equipped with frame main part (1), the left side of frame main part (1) top surface is equipped with loading surface (11), the right side of loading surface (11) is equipped with convex part (12), the left side of frame main part (1) bottom surface is equipped with first interior concave part (13), still includes first template (2), the first end limit of first template (2) is contacted with first template (2) middle part after inwards buckling and is constituted first die cavity (21), form interior concave part (14) of second between first die cavity (21) and frame main part (1) bottom surface.

2. Profile for a battery pack (5) according to claim 1, characterised in that the right side of the bottom surface of the frame-shaped body (1) is provided with a second internal recess (14).

3. Section bar for battery packs (5) according to claim 2, characterized in that the first end edge comprises a first outwardly folded end portion (22) which is folded outwards, the first outwardly folded end portion (22) being in contact with the middle of the first profile (2).

4. The section bar for the battery pack (5) according to claim 2, comprising a second section bar (3), wherein two end edges of the second section bar (3) are respectively connected with the second end edge of the first section bar (2) and the first cavity (21), and the first concave part (13) is arranged on the bottom surface of the second section bar (3).

5. Section bar for battery packs (5) according to claim 4, characterized in that the second profile (3) comprises a second folded-out end (31) which is folded out, the second folded-out end (31) being connected to the first mould cavity (21).

6. The section bar for the battery pack (5) according to claim 5, which comprises a third section bar (4), wherein the two end edges of the third section bar (4) are respectively connected with the first section bar (2) to form a third cavity, and the upper convex part (12) is formed by the third section bar (4).

7. The profile for battery packs (5) according to claim 6, wherein the first profile plate (2), the second profile plate (3) and the third profile plate (4) are long profiles that are punched or rolled.

8. A lower case frame (53) of a battery pack (5), characterized in that it is made of several profiles for a battery pack (5) according to any of claims 1 to 7.

9. The lower case frame (53) of the battery pack (5) according to claim 8, wherein a plurality of reinforcing beams (535) are disposed in the lower case frame (53), and a plurality of cell module placing seats (526) partitioned by the reinforcing beams (535) are disposed in the lower case frame (53).

10. The battery pack (5) lower case frame (53) of claim 9, wherein the connection between the profiles comprises welding, between the profiles and the section bars, and between the section bars and the reinforcement beam (535).

11. A battery pack (5) comprising the lower case frame (53) of the battery pack (5) according to claim 9 or 10, wherein the battery pack (5) is provided with a top cover (51), the lower case frame (53), a water cooling plate (54) and a bottom guard plate (55) in sequence from top to bottom.

12. An electric consumer (6) characterized in that it comprises a battery pack (5) according to claim 11.

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