Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and solves the problem of low connection reliability of a connecting beam and a side beam in the prior art. The battery device comprises a battery box body and a battery monomer, and the battery monomer is accommodated in the battery box body; wherein the battery box body comprises a frame body, a connecting beam and a fixing piece; the frame body comprises a first side beam; the connecting beam is positioned in the frame body; one end of the connecting beam is inserted into the first side beam; the fixing piece is located at the inserting position of the first side beam and the connecting beam and arranged at one end of the connecting beam so as to connect the first side beam with one end of the connecting beam.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical equipment. Background Art

[0002] At present, from the perspective of the development of the market situation, battery devices are more and more widely used. The battery device can be a power battery, and the battery device can also be an energy storage battery.

[0003] The battery device may include a battery box body and battery cells, and the battery cells are accommodated in the battery box body; wherein, both ends of the connecting beam of the battery box body are respectively welded to two side beams of the frame of the battery box body. However, the connection reliability between the connecting beam and the side beam is relatively low, so that the reliability of the battery box body is relatively low, and further the reliability of the battery device is relatively low. Summary of the Utility Model

[0004] The main technical problem to be solved by the present application is to provide a battery device and an electrical equipment, which solve the problem of relatively low connection reliability between the connecting beam and the side beam in the prior art.

[0005] To solve the above technical problem, the first technical solution adopted by the present application is: to provide a battery device, which includes a battery box body and battery cells, and the battery cells are accommodated in the battery box body; wherein, the battery box body includes a frame, a connecting beam and a fixing member; the frame includes a first side beam; the connecting beam is located inside the frame; one end of the connecting beam is inserted into the first side beam; the fixing member is located at the insertion part of the first side beam and the connecting beam, and is arranged at one end of the connecting beam to connect the first side beam and the connecting beam.

[0006] In this embodiment, one end of the connecting beam is inserted into the first side beam, and the fixing member is located at the insertion part and connects one end of the first side beam and the connecting beam, so that the connecting beam can be reliably fixed in the frame, and the risk of deformation of the connecting beam and the side beam caused by welding is reduced, making the reliability of the battery box body relatively high, thereby improving the reliability of the battery device.

[0007] In some embodiments, one end of the connecting beam is inserted into the first side beam.

[0008] In this embodiment, one end of the connecting beam is inserted into the first side beam, which facilitates the insertion connection between the connecting beam and the first side beam.

[0009] In some embodiments, the first side beam includes a frame with a cavity and two limiting parts; the two limiting parts are arranged in the cavity at intervals and are fixedly connected to the frame; the side wall of the frame close to the connecting beam is defined as the inner side wall of the frame, and the inner side wall of the frame has an opening, and one end of the connecting beam passes through the opening and is located between the two limiting parts.

[0010] In this embodiment, the hole wall of the opening can limit the movement of the connecting beam in a direction perpendicular to the insertion direction, and the two limiting portions can limit the movement of the connecting beam in the direction opposite to the relative direction of the two limiting portions. The two limiting portions strengthen the limitation of the connecting beam in the direction opposite to the relative direction of the two limiting portions, reduce the possibility of relative movement of the connecting beam relative to the first side beam, and reduce the probability of failure of the fixing member due to the relative movement of the connecting beam and the first side beam. Therefore, the connection stability between the connecting beam and the first side beam is better, the reliability of the battery box is improved, and further the reliability of the battery device is improved.

[0011] In some embodiments, the two limiting portions are spaced apart along the height direction of the battery box.

[0012] In this embodiment, the two limiting portions are spaced apart along the height direction of the battery box, which makes it easier to install the fixing member. Moreover, the two limiting portions strengthen the limitation of the connecting beam along the height direction of the battery box, reduce the possibility of relative movement of the connecting beam relative to the first side beam, and reduce the probability of failure of the fixing member due to the relative movement of the connecting beam and the first side beam. Therefore, the connection stability between the connecting beam and the first side beam is better, the reliability of the battery box is improved, and further the reliability of the battery device is improved.

[0013] In some embodiments, along the height direction of the battery box, the side wall of the frame at the end of the limiting portion away from the connecting beam has a through hole for the fixing member to pass through; the fixing member is located in the cavity of the frame, and the fixing member sequentially passes through one limiting portion, one end of the connecting beam, and the other limiting portion.

[0014] In this embodiment, the fixing member passes through the through hole and is located in the cavity of the frame, which can reduce the probability of corrosion of the fixing member by external water vapor and make the service life of the fixing member longer. The fixing member sequentially passes through one limiting portion, one end of the connecting beam, and the other limiting portion, so that the fixing member restricts the relative movement of the connecting beam relative to the first side beam in a direction perpendicular to the extension direction of the fixing member; by using the cooperation of the function of the two limiting portions to limit the connecting beam and the function of the fixing member to connect the two limiting portions and the connecting beam, the connection stability between the connecting beam and the first side beam is better, thereby improving the reliability of the battery box and further improving the reliability of the battery device.

[0015] In some embodiments, the battery box further includes a plugging portion, which is connected to the frame and plugs the through hole.

[0016] In this embodiment, the plugging portion plugs the through hole, which can further reduce the probability of corrosion of the fixing member by external water vapor and make the service life of the fixing member longer.

[0017] In some embodiments, the two limiting parts are respectively defined as a first limiting part and a second limiting part; along the height direction of the battery box body, the first limiting part is located at the top of the second limiting part, and the side wall of the frame located at one end of the first limiting part away from the connecting beam is defined as the top wall of the frame; the top wall of the frame has a through hole, and the top wall of the frame is spaced apart from the first limiting part; the surface of the blocking part away from the first limiting part is flush with the surface of the top wall of the frame away from the first limiting part, and the surface of the blocking part close to the first limiting part is flush with the surface of the top wall of the frame close to the first limiting part.

[0018] In this embodiment, the surface of the blocking part away from the first limiting part is flush with the surface of the top wall of the frame away from the first limiting part, that is, the top surface of the blocking part is flush with the outer surface of the top wall of the frame, which can reduce the interference with the top structure, improve the connection strength between the frame and the top structure, thereby improving the reliability of the battery box body, and further improving the reliability of the battery device. The surface of the blocking part close to the first limiting part is flush with the surface of the top wall of the frame close to the first limiting part, that is, the bottom surface of the blocking part is flush with the inner surface of the top wall of the frame, making the structure of the blocking part simple and light in weight.

[0019] In some embodiments, the connecting beam includes a beam body part and a connecting part, and the connecting part is connected to one end of the beam body part; along the height direction of the battery box body, the height of the connecting part is less than the height of the beam body part; the connecting part is used as one end of the connecting beam and is inserted into the first side beam.

[0020] In this embodiment, along the height direction of the battery box body, the height of the connecting part is less than the height of the beam body part; the connecting part is inserted into the first side beam, so that the part of the beam body part higher than the connecting part can abut against the inner side wall of the first side beam, which can reduce the risk of damage to the connecting part and the fixing part due to the interaction between the fixing part and the side of the connecting part close to the beam body part, thereby improving the reliability of the battery box body, and further improving the reliability of the battery device.

[0021] In some embodiments, the connecting part has an installation cavity; the connecting beam further includes a reinforcing sleeve, the reinforcing sleeve is located in the installation cavity, and both ends of the reinforcing sleeve are fixedly connected to the connecting part; the fixing part sequentially passes through one limiting part, the reinforcing sleeve and the other limiting part, and the fixing part is in contact with the reinforcing sleeve.

[0022] In this embodiment, the connecting portion has an installation cavity, which can reduce the weight of the connecting portion. The fixing member sequentially passes through one of the limiting portions, the reinforcing sleeve, and the other limiting portion, and the fixing member is in contact with the reinforcing sleeve; both ends of the reinforcing sleeve are fixedly connected to the connecting portion, which can increase the contact area between the fixing member and the connecting beam, reduce the interaction force between the fixing member and the connecting beam, and thus reduce the probability of damage to the top wall or bottom wall of the installation cavity of the connecting portion, making the connection between the connecting beam and the first side beam more stable, thereby improving the reliability of the battery box, and further improving the reliability of the battery device.

[0023] In some embodiments, the number of connecting portions is two, and the two connecting portions are respectively connected to both ends of the beam body portion; the number of the first side beams is two, and the two connecting portions are respectively inserted into two oppositely arranged first side beams.

[0024] In this embodiment, the two connecting portions are respectively inserted into two oppositely arranged first side beams, which can further reduce the risk of deformation of the connecting beam and the side beam caused by welding, making the battery box more reliable, thereby further improving the reliability of the battery box, and further improving the reliability of the battery device.

[0025] To solve the above technical problems, the second technical solution provided by this application is: to provide an electrical equipment, which includes the above-mentioned battery device. Since the electrical equipment includes the above-mentioned battery device, the electrical equipment has the same technical effects as the above-mentioned battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of the electrical equipment provided by this application;

[0028] Figure 2 is a schematic structural diagram of the battery device provided by this application;

[0029] Figure 3 is a schematic structural diagram of the frame provided by this application;

[0030] Figure 4 is Figure 3 a cross-sectional view taken at A - B;

[0031] Figure 5 is Figure 4 an enlarged view taken at Q;

[0032] Figure 6 is Figure 5 a schematic structural view of the first side beam in

[0033] Figure 7 a partial view of the frame provided by the present application;

[0034] Figure 8 a schematic structural view of the battery cell provided by the present application.

[0035] In the figure: 1, battery device; 11, battery box; 12, battery cell; 121, connecting member; 122, cover plate; 123, terminal post; 124, safety valve; 125, electrode assembly; 126, housing; 13, top structure; 14, frame; 140, groove; 141, first side beam; 1411, border; 1412, limiting portion; 142, connecting beam; 1421, beam body portion; 1422, connecting portion; 1423, installation cavity; 143, side beam; 144, opening; 145, accommodating cavity; 1451, top cavity; 1452, hollow cavity; 1453, bottom cavity; 1454, sub-accommodating cavity; 146, fixing member; 147, reinforcing sleeve; 148, blocking portion; 149, through hole; 15, bottom structure; 2, electrical appliance component. Specific embodiments

[0036] The following will, with reference to the accompanying drawings in the embodiments of the present application, describe the technical solutions in the embodiments of the present application clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0037] In the following description, specific details such as specific system structures, interfaces, and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the present application.

[0038] The following will, with reference to the accompanying drawings in the embodiments of the present application, describe the technical solutions in the embodiments of the present application clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0039] The terms "first", "second", and "third" in this application are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include unlisted steps or units, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0041] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. The battery device can be a power battery, which is a power source that provides power for tools. The power battery mostly refers to a storage battery that provides power for transportation tools such as electric vehicles, electric trains, electric bicycles, and golf carts, as well as for aerospace. Of course, the battery device can also be an energy storage battery, which refers to a storage battery used for storing energy in renewable energy power stations such as hydropower, thermal power, wind power, and solar power stations. With the continuous expansion of the application field of battery devices, the market demand is also constantly increasing.

[0042] The battery device may include a battery box body and battery cells, and the battery cells are accommodated in the battery box body; wherein, the battery box body may include a frame body and connecting beams; the connecting beams are located within the frame body, and both ends of the connecting beams are welded to two side beams of the frame body respectively. However, during welding, the high temperature generated by welding will cause certain deformation of the connecting beams and side beams. Especially for the connecting beams and side beams with a hollow structure used to reduce weight, they are more likely to deform during welding, which makes the connection reliability between the connecting beams and side beams relatively low, thus making the reliability of the battery box body relatively low, and further making the reliability of the battery device relatively low.

[0043] To solve the problem of low connection reliability between the connecting beam and the side beam, resulting in low reliability of the battery box, an embodiment of the present application provides a battery device. The battery device includes a battery box and battery cells, and the battery cells are accommodated in the battery box. Among them, the battery box includes a frame body, a connecting beam, and a fixing member. The frame body includes a first side beam. The connecting beam is located inside the frame body. One end of the connecting beam is inserted into the first side beam. The fixing member is located at the insertion part of the first side beam and the connecting beam, is arranged at one end of the connecting beam, and connects the first side beam and one end of the connecting beam. In this embodiment, one end of the connecting beam is inserted into the first side beam, and the fixing member is located at the insertion part and connects the first side beam and one end of the connecting beam, which can reliably fix the connecting beam in the frame body and reduce the risk of deformation of the connecting beam and the side beam due to welding, making the reliability of the battery box higher, thereby improving the reliability of the battery device.

[0044] An embodiment of the present application provides an electrical device. Refer to Figure 1 , the electrical device includes a battery device 1. Specifically, the electrical device further includes an electrical component 2, and the battery device 1 is electrically connected to the electrical component 2. The battery device 1 is used to provide electrical energy for the electrical device so that the electrical device can work.

[0045] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, an extended-range electric vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc. The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator, an electric planer, etc. For the convenience of description in the following embodiments, the electrical device is taken as a vehicle as an example for description.

[0046] The electrical component 2 can be an element or device that can use electricity; the electrical component 2 can be a controller and electronic components, etc., and the controller can be a central processing unit (Central Processing Unit, abbreviated as CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0047] In some examples, the electrical device can be a vehicle, and the electrical component 2 can be a vehicle lamp (such as a headlamp, a taillamp, etc.), a display screen, an instrument panel, a control system (such as a controller), etc. The vehicle can also include a vehicle frame, and both the battery device 1 and the electrical component 2 are mounted on the vehicle body.

[0048] An embodiment of the present application further provides a battery device. Refer to Figures 2 to 7 , the battery device 1 includes a battery box body 11 and battery cells 12, and the battery cells 12 are accommodated in the battery box body 11; wherein, the battery box body 11 includes a frame body 14, a connecting beam 142 and a fixing member 146; the frame body 14 includes a first side beam 141; the connecting beam 142 is located inside the frame body 14; one end of the connecting beam 142 is inserted into the first side beam 141; the fixing member 146 is located at the insertion position of the first side beam 141 and the connecting beam 142, and is arranged at one end of the connecting beam 142 to connect the first side beam 141 and the connecting beam 142.

[0049] The battery box body 11 has a chamber, and one or more battery cells 12 are accommodated in the chamber; the battery box body 11 can play a role in protecting the battery cells 12 and also facilitates concentrating a plurality of battery cells 12 together. The shape of the battery box body 11 can be specifically set according to needs. For example, the shape of the battery box body 11 can be cylindrical, rectangular, etc.

[0050] The battery box body 11 can include a frame body 14, a top structure 13 and a bottom structure 15; the frame body 14 is connected between the top structure 13 and the bottom structure 15 to enclose a chamber. The frame body 14 includes at least three side beams 143, and the at least three side beams 143 are connected end to end in sequence to form the frame body 14; for example, the number of side beams 143 is four, and a rectangular frame body 14 can be formed. Two adjacent side beams 143 are arranged in a cross manner, for example, two adjacent side beams 143 are perpendicular. The top structure 13 is connected to the frame body 14 and can cover an opening of the frame body 14; the bottom structure 15 is connected to the frame body 14 and can cover another opening of the frame body 14; the top structure 13 and the bottom structure 15 are oppositely arranged along the height direction Y of the frame body 14. Among them, two adjacent side beams 143 can be fixedly connected by welding or the like, or can be detachably connected.

[0051] In some examples, the battery box body 11 can include a lower box body and an upper box body that can be covered. For example, the top structure 13 serves as the upper box body, and the mutually connected bottom structure 15 and the frame body 14 serve as the lower box body. The bottom structure 15 can include a bottom guard plate and a cooling plate; the cooling plate is arranged on the frame body 14, and the bottom guard plate is arranged on the side of the cooling plate away from the frame body 14. For example, the bottom structure 15 can further include a bottom plate, and the bottom plate is arranged between the frame body 14 and the cooling plate. Among them, the height direction Y of the frame body 14 and the height direction Y of the battery box body 11 are in the same direction.

[0052] Multiple battery cells 12 can be connected in series, parallel, or in a series-parallel combination. The multiple battery cells 12 in the battery module can be electrically connected through a busbar component to achieve, for example, parallel, series, or series-parallel connection of the multiple battery cells 12 in the battery module.

[0053] The battery cell 12 can be a secondary battery, which refers to a battery cell 12 that can be activated by charging after discharging to continue use. The battery cell 12 can include, but is not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium-metal batteries, sodium-metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0054] See Figure 8 , the battery cell 12 can include a housing 126, an electrode assembly 125, and a cover plate 122. The housing 126 has a communicating cavity and an installation opening. The number of electrode assemblies 125 can be one or more; the electrode assembly 125 is installed in the cavity of the housing 126. The cover plate 122 is connected to the housing 126 and covers the installation opening. The housing 126 is filled with an electrolyte, such as an electrolyte solution.

[0055] The electrode assembly 125 can include an anode plate and a cathode plate, and a separator disposed between the anode plate and the cathode plate. During the charge and discharge process of the battery cell 12, active ions (such as lithium ions) are embedded and extracted back and forth between the anode plate and the cathode plate. The separator can play a role in preventing short circuit between the anode plate and the cathode plate to a certain extent, and at the same time allow active ions to pass through.

[0056] The battery cell 12 can also include a safety valve 124 (which can also be called a pressure relief valve), two pole posts 123, and two connection members 121 (which can also be called current collector members). The safety valve 124 can be disposed on the cover plate 122, for example, the safety valve 124 is fixed on the cover plate 122, and the safety valve 124 is used to actuate to discharge the internal electrolyte when the internal pressure or temperature of the battery cell 12 reaches a threshold value to reduce the internal pressure or temperature of the battery cell 12. For example, the safety valve 124 can be a temperature-sensitive valve, a pressure-sensitive valve, etc. The two pole posts 123 can be disposed on the cover plate 122, and the two pole posts 123 are respectively a positive pole post 123 and a negative pole post 123, and one pole post 123 is correspondingly connected to one connection member 121. The connection member 121 is located between the cover plate 122 and the electrode assembly 125 and is used to electrically connect the electrode assembly 125 and the pole post 123. The housing 126 is a hollow structure, and the material of the housing 126 can be metal or plastic; for example, the material of the housing 126 can be copper, iron, aluminum, steel, aluminum alloy, etc.

[0057] The first side beam 141 refers to the side beam 143 among the multiple side beams 143 that is connected to the connecting beam 142. It can be a metal, which can be a single element such as iron, aluminum, copper, etc., or an alloy of single elements. For example, the side beam 143 can be a hollow steel material similar to a square shape, a "day" shape, or an "eye" shape.

[0058] The material of the connecting beam 142 can be a metal, which can be a single element such as iron, aluminum, copper, etc., or an alloy of single elements. For example, the connecting beam 142 can be a hollow steel material similar to a square shape, a "day" shape, or an "eye" shape. The number of the connecting beams 142 can be one or more to divide the accommodation cavity 145 of the frame body 14 into multiple sub-accommodation cavities 1454. Among them, the multiple connecting beams 142 can be parallel to each other and arranged at intervals; or the multiple connecting beams 142 can be arranged in a horizontal and vertical intersecting manner.

[0059] In some examples, the number of the first side beams 141 is two; one of the two first side beams 141 is inserted into one end of the connecting beam 142, and the other is connected to the other end of the connecting beam 142 (for example, it can be insertion, bolt connection, etc.). For example, the connecting beam 142 is inserted into both of the two first side beams 141. The two first side beams 141 can intersect or be arranged oppositely, such as being parallel to each other and arranged at intervals. Among them, the extending directions of the two oppositely arranged first side beams 141 are perpendicular to the extending direction of the connecting beam 142. For example, the number of the multiple side beams 143 is four, and the four side beams 143 are connected end to end to form a rectangular frame body 14. The four side beams 143 can include two relatively arranged long side beams and two relatively arranged short side beams; the length of the long side beam is greater than the length of the short side beam. The two oppositely arranged first side beams 141 can be the two relatively arranged short side beams.

[0060] In some other examples, the other end of the connecting beam 142 is suspended, that is, the other end of the connecting beam 142 is not connected to the side beam 143; at this time, the connecting beam 142 can be fixedly connected to the bottom structure 15 through a fixing member (such as a long bolt or a rivet).

[0061] In some examples, one end of the connecting beam 142 is inserted into the first side beam 141. In some other examples, the convex portion on the inner side wall of the first side beam 141 is inserted into one end of the connecting beam 142. Or, the connecting beam 142 and the first side beam 141 are inserted into each other.

[0062] The fixing member 146 is a structure for connecting the connecting beam 142 and the side beam 143. The fixing member 146 can be a rigid structure such as a bolt or a rivet, and the fixing member 146 of this rigid structure can penetrate through the insertion joint. In some examples, the extending direction of the fixing member 146 is parallel to the extending direction of the connecting beam 142. For example, the screw of the bolt penetrates through the outer side wall of the first side beam 141 and the end face of the connecting beam 142, and the bolt head of the bolt abuts against the outer side face of the outer side wall of the first side beam 141. In some other examples, the extending direction of the fixing member 146 intersects (such as being perpendicular) with the extending direction of the connecting beam 142. For example, the extending direction of the fixing member 146 is parallel to the height direction Y of the battery box body 11; for example, the screw of the bolt penetrates through the top wall of the first side beam 141 and the top wall of the connecting beam 142, and the bolt head of the bolt abuts against the top face of the top wall of the first side beam 141. Of course, the fixing member 146 can also be an adhesive layer, etc. For example, the adhesive layer is bonded between the connecting beam 142 and the side beam 143.

[0063] The insertion direction X of one end of the connecting beam 142 and the first side beam 141 coincides with the extending direction or the length direction of the connecting beam 142.

[0064] In this embodiment, one end of the connecting beam 142 is inserted into the first side beam 141, and the fixing member 146 is located at the insertion joint and connects the first side beam 141 and one end of the connecting beam 142, so that the connecting beam 142 can be reliably fixed in the frame body 14, and the risk of deformation of the connecting beam 142 and the side beam 143 caused by welding is reduced, making the reliability of the battery box body 11 relatively high, and further improving the reliability of the battery device 1.

[0065] In some embodiments, one end of the connecting beam 142 is inserted into the first side beam 141.

[0066] In some examples, the inner side face of the first side beam 141 has a groove 140, and one end of the connecting beam 142 is inserted into the groove 140 of the first side beam 141.

[0067] In this embodiment, one end of the connecting beam 142 is inserted into the first side beam 141, which facilitates the insertion of the connecting beam 142 and the first side beam 141.

[0068] In some embodiments, referring to Figure 5 and Figure 6 , the first side beam 141 includes a frame 1411 with a cavity and two limiting portions 1412; the two limiting portions 1412 are arranged at intervals in the cavity and are fixedly connected to the frame 1411; the side wall of the frame 1411 close to the connecting beam 142 is defined as the inner side wall of the frame 1411, and the inner side wall of the frame 1411 has an opening 144, and one end of the connecting beam 142 passes through the opening 144 and is located between the two limiting portions 1412.

[0069] In some examples, the first side beam 141 includes a frame 1411 having a cavity and two limiting portions 1412; the two limiting portions 1412 are spaced apart in the cavity and fixedly connected to the frame 1411; the inner side wall of the frame 1411 has an opening 144, and one end of the connecting beam 142 passes through the opening 144 and is located between the two limiting portions 1412. Wherein, the two limiting portions 1412 and a part of the outer side wall of the frame 1411 enclose a groove 140, and the opening 144 can be the notch of the groove 140.

[0070] In some examples, the first side beam 141 can be an I-shaped steel, and two spaced reinforcing plates inside the I-shaped steel can serve as the two limiting portions 1412. In other examples, the first side beam 141 can be a square-shaped steel, and the two limiting portions 1412 are fixed (such as welded) inside the steel.

[0071] In some examples, one limiting portion 1412 is spaced apart from the top wall of the frame 1411, and the other limiting portion 1412 is spaced apart from the bottom wall of the frame 1411. The two limiting portions 1412 divide the cavity of the frame 1411 into three sub-cavities; along the height direction Y of the battery box body 11, the three sub-cavities are a top cavity 1451, a middle cavity 1452, and a bottom cavity 1453 respectively. Wherein, one end of the connecting beam 142 is located in the middle cavity 1452. Wherein, the middle cavity 1452 communicates with the opening 144 to form the groove 140. In other examples, one limiting portion 1412 is in contact with the top wall of the frame 1411 (that is, there is no gap), and the other limiting portion 1412 is in contact with the bottom wall of the frame 1411 (that is, there is no gap).

[0072] Along the relative direction of the two limiting portions 1412 (such as the height direction Y of the battery box body 11), the aperture of the opening 144 is greater than or equal to the distance between the two limiting portions 1412. The shape of the opening 144 is the same as the shape of one end of the first side beam 141. For example, the shapes of the opening 144 and one end of the first side beam 141 are both rectangular.

[0073] In some examples, the two limiting portions 1412 are spaced apart along the height direction Y of the battery box body 11. In other examples, the two limiting portions 1412 are spaced apart along the extending direction of the frame 1411.

[0074] In this embodiment, the hole wall of the through hole 144 can limit the movement of the connecting beam 142 in a direction perpendicular to the insertion direction X. The two limiting portions 1412 can limit the movement of the connecting beam 142 in the direction opposite to the relative direction of the two limiting portions 1412. The two limiting portions 1412 strengthen the limitation of the connecting beam 142 in the direction opposite to the relative direction of the two limiting portions 1412, reduce the possibility of relative movement of the connecting beam 142 relative to the first side beam 141, and reduce the probability of failure of the fixing member 146 due to the relative movement of the connecting beam 142 and the first side beam 141. Therefore, the connection stability between the connecting beam 142 and the first side beam 141 is relatively good, the reliability of the battery box body 11 is improved, and further the reliability of the battery device 1 is improved.

[0075] In some embodiments, continue to refer to Figure 5 and Figure 6 , the two limiting portions 1412 are arranged at intervals along the height direction Y of the battery box body 11.

[0076] It should be noted that in this embodiment, the relative direction of the two limiting portions 1412 is the height direction Y of the battery box body 11.

[0077] In this embodiment, the two limiting portions 1412 are arranged at intervals along the height direction Y of the battery box body 11, making it easier to install the fixing member 146. Moreover, the two limiting portions 1412 strengthen the limitation of the connecting beam 142 along the height direction Y of the battery box body 11, reduce the possibility of relative movement of the connecting beam 142 relative to the first side beam 141, and reduce the probability of failure of the fixing member 146 due to the relative movement of the connecting beam 142 and the first side beam 141. Therefore, the connection stability between the connecting beam 142 and the first side beam 141 is relatively good, the reliability of the battery box body 11 is improved, and further the reliability of the battery device 1 is improved.

[0078] In some embodiments, refer to Figures 5 to 7 , along the height direction of the battery box body 11, the side wall of the frame 1411 at one end of the limiting portion 1412 away from the connecting beam 142 has a through hole 149 for the fixing member 146 to pass through; the fixing member 146 is located in the cavity of the frame 1411, and the fixing member 146 sequentially passes through one limiting portion 1412, one end of the connecting beam 142, and the other limiting portion 1412.

[0079] Since there are two limiting portions 1412, along the height direction of the battery box body 11, the side wall of the frame 1411 at one end of the limiting portion 1412 away from the connecting beam 142 can be the top wall of the frame 1411 or the bottom wall of the frame 1411. The through hole 149 can be opened on the top wall or the bottom wall of the frame 1411, so that the fixing member 146 can be inserted from the top wall of the frame 1411 or from the bottom wall of the frame 1411 along the height direction of the battery box body 11.

[0080] The aperture of the through-hole 149 is greater than or equal to the maximum diameter of the fixing member 146, so that all parts of the fixing member 146 can pass through the through-hole 149 and enter the cavity of the frame 1411. In some examples, the through-hole 149 can be a round hole, a square hole, etc.

[0081] In this embodiment, the fixing member 146 passes through the through-hole 149 and is located in the cavity of the frame 1411, which can reduce the probability of corrosion of the fixing member 146 by external water vapor, so that the fixing member 146 has a longer service life. Moreover, the fixing member 146 sequentially passes through a limiting portion 1412, one end of the connecting beam 142, and another limiting portion 1412, so that the fixing member 146 restricts the relative movement of the connecting beam 142 relative to the first side beam 141 in a direction perpendicular to the extending direction of the fixing member 146; by the cooperation of the function of the two limiting portions 1412 for restricting the connecting beam 142 and the function of the fixing member 146 for connecting the two limiting portions 1412 and the connecting beam 142, the connection stability between the connecting beam 142 and the first side beam 141 is better, thereby improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0082] In some embodiments, referring further to Figures 5 to 7 , the battery box 11 further includes a plugging portion 148, the plugging portion 148 is connected to the frame 1411 and plugs the through-hole 149.

[0083] The shape of the plugging portion 148 can be sheet-like. The material of the plugging portion 148 can be metal or non-metal, and the material of the plugging portion 148 is iron. The plugging portion 148 and the frame 1411 can be fixedly connected or detachably connected. For example, the plugging portion 148 and the frame 1411 can be adhesively bonded, welded, interference-fitted, etc. In some examples, the shape of the plugging portion 148 is adapted to the shape of the through-hole 149. For example, the shapes of both the plugging portion 148 and the through-hole 149 are circular.

[0084] The top surface of the plugging portion 148 is flush with the outer surface of the top wall of the frame 1411, and / or the bottom surface of the plugging portion 148 is flush with the inner surface of the top wall of the frame 1411. In some examples, the top surface of the plugging portion 148 is flush with the outer surface of the top wall of the frame 1411, and the bottom surface of the plugging portion 148 is not flush with the inner surface of the top wall of the frame 1411. In other examples, the top surface of the plugging portion 148 is not flush with the outer surface of the top wall of the frame 1411, and the bottom surface of the plugging portion 148 is flush with the inner surface of the top wall of the frame 1411. In other examples, the top surface of the plugging portion 148 is flush with the outer surface of the top wall of the frame 1411, and the bottom surface of the plugging portion 148 is flush with the inner surface of the top wall of the frame 1411.

[0085] In this embodiment, the blocking portion 148 blocks the through-hole 149, which can further reduce the probability of corrosion of the fixing member 146 by external water vapor, so that the service life of the fixing member 146 is longer.

[0086] In some embodiments, continue to refer to Figure 5 and Figure 6 , the two limiting portions 1412 are respectively defined as a first limiting portion and a second limiting portion; along the height direction of the battery box body 11, the first limiting portion is located at the top of the second limiting portion, and the side wall of the frame 1411 located at one end of the first limiting portion away from the connecting beam 142 is defined as the top wall of the frame 1411; the top wall of the frame 1411 has a through-hole 149, and the top wall of the frame 1411 is spaced apart from the first limiting portion; the surface of the blocking portion 148 away from the first limiting portion is flush with the surface of the top wall of the frame 1411 away from the first limiting portion, and the surface of the blocking portion 148 close to the first limiting portion is flush with the surface of the top wall of the frame 1411 close to the first limiting portion.

[0087] Specifically, Figure 5 among the two limiting portions 1412, the limiting portion 1412 close to the blocking portion 148 is defined as the first limiting portion, and the other is defined as the second limiting portion. The surface of the blocking portion 148 away from the first limiting portion is defined as the top surface of the blocking portion 148, and the surface of the top wall of the frame 1411 away from the first limiting portion is defined as the outer surface of the top wall of the frame 1411. The surface of the blocking portion 148 close to the first limiting portion is defined as the bottom surface of the blocking portion 148, and the surface of the top wall of the frame 1411 close to the first limiting portion is defined as the inner surface of the top wall of the frame 1411.

[0088] The top wall of the frame 1411 is spaced apart from the first limiting portion, so that a top cavity 1451 is formed between the top wall of the frame 1411 and the first limiting portion; at this time, the fixing member 146 is, for example, a bolt, and the bolt head of the bolt is located in the top cavity 1451.

[0089] In this embodiment, the surface of the blocking portion 148 away from the first limiting portion is flush with the surface of the top wall of the frame 1411 away from the first limiting portion, that is, the top surface of the blocking portion 148 is flush with the outer surface of the top wall of the frame 1411, which can reduce the interference with the top structure 13, improve the connection strength between the frame 1411 and the top structure 13, thereby improving the reliability of the battery box body 11, and further improving the reliability of the battery device 1. The surface of the blocking portion 148 close to the first limiting portion is flush with the surface of the top wall of the frame 1411 close to the first limiting portion, that is, the bottom surface of the blocking portion 148 is flush with the inner surface of the top wall of the frame 1411, so that the structure of the blocking portion 148 is simple and the weight is light.

[0090] In some embodiments, continue to refer to Figure 5 andFigure 6 The connecting beam 142 includes a beam body portion 1421 and a connecting portion 1422. The connecting portion 1422 is connected to one end of the beam body portion 1421. Along the height direction Y of the battery box body 11, the height of the connecting portion 1422 is less than the height of the beam body portion 1421. The connecting portion 1422 is inserted into the first side beam 141.

[0091] Along the height direction Y of the battery box body 11, the height of the connecting portion 1422 is less than the height of the beam body portion 1421. It can be understood that the top wall of the beam body portion 1421 extends beyond the top wall of the connecting portion 1422, and the bottom wall of the beam body portion 1421 is flush with the bottom wall of the connecting portion 1422 or the bottom wall of the beam body portion 1421 also extends beyond the bottom wall of the connecting portion 1422. In some examples, the bottom wall of the beam body portion 1421 is flush with the bottom wall of the frame body.

[0092] The connecting portion 1422 and one end of the beam body portion 1421 can be welded or can be an integrally formed structure.

[0093] In this embodiment, along the height direction Y of the battery box body 11, the height of the connecting portion 1422 is less than the height of the beam body portion 1421. The connecting portion 1422 is inserted into the first side beam 141, so that the part of the beam body portion 1421 that is higher than the connecting portion 1422 can abut against the inner side wall of the first side beam 141, which can reduce the risk of damage to the connecting portion 1422 and the fixing member 146 due to the interaction between the fixing member 146 and the side of the connecting portion 1422 close to the beam body portion 1421, thereby improving the reliability of the battery box body 11, and further improving the reliability of the battery device 1.

[0094] In some embodiments, continue to refer to Figure 5 and Figure 6 The connecting portion 1422 has an installation cavity 1423. The connecting beam 142 further includes a reinforcing sleeve 147. The reinforcing sleeve 147 is located in the installation cavity 1423, and both ends of the reinforcing sleeve 147 are fixedly connected to the connecting portion 1422. The fixing member 146 sequentially passes through a limiting portion 1412, the reinforcing sleeve 147, and another limiting portion 1412, and the fixing member 146 is in contact with the reinforcing sleeve 147.

[0095] The connecting portion 1422 can be a hollow steel of a square shape with an opening, and at this time, the inside of the square-shaped steel is the installation cavity 1423. The reinforcing sleeve 147 refers to a sleeve with relatively high strength. For example, the reinforcing sleeve 147 can be a metal sleeve. In some examples, the reinforcing sleeve 147 and the connecting portion 1422 can be welded or can be an integrally formed structure.

[0096] The fixing member 146 sequentially passes through a limiting portion 1412, a reinforcing sleeve 147, and another limiting portion 1412, which means that the fixing member 146 sequentially passes through the through hole of a limiting portion 1412, the inner hole of the reinforcing sleeve 147, and the through hole of another limiting portion 1412. For example, Figure 5 in the figure, the fixing member 146 sequentially passes through the through hole of the first limiting portion, the inner hole of the reinforcing sleeve 147, and the through hole of the second limiting portion. The fixing member 146 being in contact with the reinforcing sleeve 147 means that the fixing member 146 contacts the hole wall of the inner hole of the reinforcing sleeve 147.

[0097] In this embodiment, the connecting portion 1422 has an installation cavity 1423, which can reduce the weight of the connecting portion 1422. The fixing member 146 sequentially passes through a limiting portion 1412, a reinforcing sleeve 147, and another limiting portion 1412, and the fixing member 146 is in contact with the reinforcing sleeve 147; both ends of the reinforcing sleeve 147 are fixedly connected to the connecting portion 1422, which can increase the contact area between the fixing member 146 and the connecting beam 142, reduce the interaction force between the fixing member 146 and the connecting beam 142, and thus reduce the probability of damage to the top wall or bottom wall of the installation cavity 1423 of the connecting portion 1422, making the connection between the connecting beam 142 and the first side beam 141 more stable, thereby improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0098] In some embodiments, referring to Figures 3 to 6 , the number of the connecting portions 1422 is two, and the two connecting portions 1422 are respectively connected to both ends of the beam body portion 1421; the number of the first side beams 141 is two, and the two connecting portions 1422 are respectively inserted into two oppositely arranged first side beams 141.

[0099] In this embodiment, the two connecting portions 1422 are respectively inserted into two oppositely arranged first side beams 141, which can further reduce the risk of deformation of the connecting beam 142 and the side beam 143 caused by welding, making the battery box 11 more reliable, thereby further improving the reliability of the battery box 11, and further improving the reliability of the battery device 1.

[0100] The above is only the implementation mode of the present application, and does not limit the patent protection scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising a battery box body and battery cells, the battery cells are accommodated in the battery box body; wherein, the battery box body includes: A frame body, including a first side beam; A connecting beam, located within the frame body; one end of the connecting beam is inserted into the first side beam; A fixing member, located at the insertion part of the first side beam and the connecting beam, and arranged at one end of the connecting beam to connect the first side beam and the connecting beam.

2. The battery device according to claim 1, wherein One end of the connecting beam is inserted into the first side beam.

3. The battery device according to claim 2, wherein The first side beam includes a frame with a cavity and two limiting parts; the two limiting parts are spaced apart within the cavity and fixedly connected to the frame; the side wall of the frame close to the connecting beam is defined as the inner side wall of the frame, and the inner side wall of the frame has an opening, and one end of the connecting beam passes through the opening and is located between the two limiting parts.

4. The battery device according to claim 3, wherein The two limiting parts are spaced apart along the height direction of the battery box body.

5. The battery device according to claim 4, wherein Along the height direction of the battery box body, the side wall of the frame at the end of the limiting part away from the connecting beam has a through hole for the fixing member to pass through; the fixing member is located within the cavity of the frame, and the fixing member sequentially passes through one of the limiting parts, one end of the connecting beam, and the other limiting part.

6. The battery device according to claim 5, wherein The battery box body further includes a blocking part, the blocking part is connected to the frame and blocks the through hole.

7. The battery device according to claim 6, wherein The two limiting parts are respectively defined as a first limiting part and a second limiting part; along the height direction of the battery box body, the first limiting part is located at the top of the second limiting part, and the side wall of the frame at the end of the first limiting part away from the connecting beam is defined as the top wall of the frame; the top wall of the frame has the through hole, and the top wall of the frame is spaced apart from the first limiting part; the surface of the blocking part away from the first limiting part is flush with the surface of the top wall of the frame away from the first limiting part, and the surface of the blocking part close to the first limiting part is flush with the surface of the top wall of the frame close to the first limiting part.

8. The battery device according to any one of claims 2 to 7, wherein The connecting beam includes a beam body part and a connecting part, the connecting part is connected to one end of the beam body part; along the height direction of the battery box body, the height of the connecting part is less than the height of the beam body part; the connecting part serves as one end of the connecting beam and is inserted into the first side beam.

9. The battery device according to claim 8, wherein The connecting portion has an installation cavity; the connecting beam further includes a reinforcing sleeve, the reinforcing sleeve is located in the installation cavity, and both ends of the reinforcing sleeve are fixedly connected to the connecting portion; the fixing member sequentially passes through a limiting portion of the first side beam, the reinforcing sleeve and another limiting portion of the first side beam, and the fixing member is in contact with the reinforcing sleeve.

10. The battery device according to claim 8, wherein the number of the connecting portions is two, and the two connecting portions are respectively connected to both ends of the beam body portion; the number of the first side beams is two, and the two connecting portions are respectively inserted into the two oppositely arranged first side beams.

11. An electrical device, characterized in that, Comprising: The battery device according to any one of claims 1 to 10.

Images