Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a battery box body, a plurality of battery monomers and a rigid member, and the plurality of battery monomers are accommodated in the battery box body; the rigid piece is arranged between two adjacent battery monomers; and the rigid piece is fixedly connected with the two adjacent single batteries. According to the technical scheme, the rigid piece is arranged between the two adjacent battery monomers, and the rigid piece is fixedly connected with the two adjacent battery monomers, so that the binding force of the two adjacent battery monomers is increased, the dominant frequency of the battery module formed by the plurality of battery monomers is improved, and the battery module has the advantages that the battery module is simple in structure and convenient to use. And the impact resistance of the battery device in the vibration process is improved.

Description

Technical Field

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

[0002] Battery devices are widely used in battery-powered vehicles, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy aircraft, and electric tools, etc.

[0003] A battery device generally includes a battery box body and a plurality of battery cells disposed in the battery box body. The plurality of battery cells form a battery module. However, during the transportation or use of the battery device, the main frequency of the battery module is relatively low, and the battery device is prone to vibration failure problems during transportation or use. Summary of the Utility Model

[0004] In view of this, the present application provides a battery device and an electrical equipment to solve the problems in the prior art that during the transportation or use of the battery device, the main frequency of the battery module is relatively low and the effect of resisting vibration impact force is limited.

[0005] To solve the above technical problems, the first technical solution provided by the present application is: to provide a battery device, including: a battery box body, a plurality of battery cells, and a rigid member, the plurality of battery cells being accommodated in the battery box body; the rigid member being disposed between two adjacent battery cells; wherein, the rigid member is fixedly connected to the two adjacent battery cells.

[0006] In the technical solution of the present application, by disposing a rigid member between two adjacent battery cells and fixedly connecting the rigid member to the two adjacent battery cells, the bonding force between the two adjacent battery cells is increased, the main frequency of the battery module formed by the plurality of battery cells is increased, and the anti-impact ability of the battery device during vibration is improved.

[0007] In some embodiments, the rigid member is fixedly connected to the two adjacent battery cells through structural adhesive.

[0008] In one or more embodiments of the present application, the rigid member is fixedly connected to the two adjacent battery cells through structural adhesive, which can not only increase the main frequency of the battery module formed by the plurality of battery cells, but also has a simple process and little damage to the housing of the battery cell.

[0009] In some embodiments, the plurality of battery cells are arranged in a two-dimensional array; the rigid member includes a connecting plate, one end of the connecting plate being clamped between a group of two adjacent battery cells, and the other end of the connecting plate being clamped between another group of two adjacent battery cells.

[0010] In one or more embodiments of the present application, the connecting plate can be a single flat plate. One end of the connecting plate is clamped between two adjacent battery cells of a group, and the other end is clamped between two adjacent battery cells of another group, so that the connecting plate is fixedly connected to two adjacent groups of battery cells, and the main frequency of the battery module formed by multiple battery cells is achieved. Moreover, the connecting plate is simple to manufacture and easy to disassemble and assemble.

[0011] In some embodiments, four battery cells located in adjacent two rows and adjacent two columns form two intersecting gaps; the rigid member includes two intersecting connecting plates, and the two connecting plates are arranged in one-to-one correspondence with the two gaps.

[0012] In one or more embodiments of the present application, the two intersecting connecting plates can form a rigid member in an L shape, a T shape or a cross shape, and each two connecting plates are arranged in one-to-one correspondence with the two gaps, so as to improve the connection strength of four battery cells located in adjacent two rows and adjacent two columns, and improve the main frequency of the formed battery module.

[0013] In some embodiments, the two connecting plates are vertically crossed and have four free ends; a sub-gap is formed between any two adjacent battery cells located in the same row or the same column, and four sub-gaps are formed by four battery cells located in adjacent two rows and adjacent two columns; the four free ends are arranged in the four sub-gaps in one-to-one correspondence.

[0014] In one or more embodiments of the present application, the two connecting plates that are vertically crossed and have four free ends can further form a cross-shaped rigid member. The four free ends of the cross-shaped rigid member are arranged in one-to-one correspondence with the four sub-gaps formed between the four battery cells, so that each free end of the rigid member is connected to the adjacent battery cells, further improving the connection strength between adjacent battery cells.

[0015] In some embodiments, at the intersection of the two connecting plates, the top of the connecting plate has a notch; along the direction from the top to the bottom of the connecting plate, the width of the notch decreases.

[0016] In one or more embodiments of the present application, by opening the notch and setting the structure of the notch to decrease in width along the direction from the top to the bottom of the connecting plate, it is convenient to inject structural adhesive from the notch 32, improving the connection effect between the connecting plate and the battery cell.

[0017] In some embodiments, along the direction from the top to the bottom of the connecting plate, the width of the notch gradually decreases or decreases in a stepped manner.

[0018] In one or more embodiments of the present application, the width of the notch gradually decreases or decreases in a stepped manner, so as to guide during the process of injecting structural adhesive and improve the accuracy of injecting structural adhesive. At the same time, inserting the connecting plate first and then injecting glue can prevent the structural adhesive from being scraped off by the battery cell or the problem of poor glue application during the insertion process of the connecting plate.

[0019] In some embodiments, along the direction from the top to the bottom of the connecting plate, the width of the bottom end of the connecting plate gradually decreases.

[0020] In one or more embodiments of the present application, the design that the width of the bottom end of the connecting plate gradually decreases can make the assembly of the connecting plate more convenient.

[0021] In some embodiments, along the direction from the top to the bottom of the connecting plate, an inclined angle is formed at the bottom end of the connecting plate.

[0022] In one or more embodiments of the present application, the design of the inclined angle at the bottom end of the connecting plate improves the process convenience of assembling the connecting plate after the battery module is formed. An inclined angle is formed at the bottom end of the connecting plate, which can be more convenient to directly insert into the gap formed between adjacent battery cells.

[0023] In some embodiments, two intersecting gaps are defined as a fork gap, and a plurality of the battery cells are arranged to form a plurality of the fork gaps; one of the rigid members is provided at each of the fork gaps.

[0024] In one or more embodiments of the present application, one of the rigid members is provided at each of the fork gaps, which further increases the main frequency of the battery module formed by a plurality of battery cells and further improves the anti-impact ability of the battery device during vibration.

[0025] In some embodiments, the battery cell includes a top cover and a pole post located on the top cover; the top end of the rigid member is higher than the top cover and lower than the pole post.

[0026] In one or more embodiments of the present application, through the above settings, it is convenient to operate, more convenient to insert the rigid member after the battery module is formed, and the interference to other components (such as the upper cover of the battery box) is reduced.

[0027] In some embodiments, the ratio of the height of the rigid member to the height of the battery cell is greater than or equal to 0.3 and less than or equal to 0.8.

[0028] In one or more embodiments of the present application, it can ensure that the rigid member and the battery cell have sufficient connection strength and reduce the weight of the rigid member attached to the battery cell, so as to reduce the excessive increase in the weight of the battery device.

[0029] In some embodiments, the battery cell is rectangular, and the width of the overlapping area between the rigid member and the side surface of the battery cell is greater than or equal to 10 mm and less than or equal to 20 mm.

[0030] In one or more embodiments of the present application, it is ensured that the rigid member and the battery cell have sufficient connection strength and the interference with the buffer layer is reduced, so that the buffer layer has sufficient width and installation space.

[0031] In some embodiments, the rigid member is a metal structural member or a resin-fiber composite structural member.

[0032] In one or more embodiments of the present application, when the rigid member is made of metal or resin-fiber composite material, the supportability of the rigid member can be enhanced, so that the support strength of the rigid member is greater than that of the buffer layer, the main frequency of the battery module formed by multiple battery cells is increased, and the anti-impact ability of the battery device during vibration is improved.

[0033] To solve the above technical problems, the second technical solution provided by the present application is: to provide an electrical device, including an electrical appliance component and the battery device as described in any one of the above; the battery device is electrically connected to the electrical appliance component. Since the electrical device includes the above battery device, the electrical device has the same technical effects as the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 is a structural schematic diagram of the electrical device provided by the present application;

[0036] Figure 2 is an exploded structural schematic diagram of the battery device provided by the present application;

[0037] Figure 3 is a top view structural schematic diagram of the battery device provided by the present application; the upper cover of the battery box is omitted;

[0038] Figure 4 is Figure 3 a partial enlarged structural schematic diagram of part A in

[0039] Figure 5 is a partial side view of the first structure of the battery device provided by the present application; the rigid member is a single flat plate and the length of the rigid member is relatively long;

[0040] Figure 6 It is a partial side view of the second structure of the battery device provided by this application; wherein the rigid member is a single flat plate and the length of the rigid member is short;

[0041] Figure 7 It is a partial side view of the third structure of the battery device provided by this application; wherein the rigid member is L-shaped;

[0042] Figure 8 It is a partial side view of the fourth structure of the battery device provided by this application; wherein the rigid member is T-shaped;

[0043] Figure 9 It is a partial side view of the fifth structure of the battery device provided by this application; wherein the rigid member is cross-shaped;

[0044] Figure 10 It is Figure 2 A schematic enlarged view of the partial structure of part B in

[0045] Figure 11 It is a schematic exploded view of the battery cell provided by this application;

[0046] Figure 12 It is Figure 3 Another schematic enlarged view of the partial structure of part A in

[0047] Figure 13 It is a schematic view of a structure of the rigid member provided by this application; wherein, the width of the notch gradually decreases along the direction from the top to the bottom of the connecting plate;

[0048] Figure 14 It is another schematic view of a structure of the rigid member provided by this application; wherein, the width of the notch decreases in a stepped manner along the direction from the top to the bottom of the connecting plate;

[0049] Figure 15 It is still another schematic view of a structure of the rigid member provided by this application; wherein, an inclined angle is formed at the bottom end of the connecting plate.

[0050] Explanation of reference numerals:

[0051] 10. Battery box; 11. Lower box; 111. Lower cover; 112. Frame; 1121. Side beam; 12. Upper cover; 13. Accommodation cavity; 20. Battery cell; 201. Connecting member; 202. Top cover; 203. Terminal post; 204. Safety valve; 205. Electrode assembly; 206. Housing; 23. Gap; 230. Fork gap; 24. Sub-gap; 21. Long side; 22. Short side; 30. Rigid member; 31. Connecting plate; 310. Free end; 311. Inclined angle; 32. Notch; 40. Buffer layer; 100. Battery device; 200. Electrical appliance component; 300. Electrical equipment. Detailed implementation manners

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0053] The terms "first" and "second" in the present application are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present 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 "include" 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 optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0054] Referring to "embodiments" herein means that a specific feature, structure or characteristic described in connection with the embodiments can be included in at least one embodiment of the present 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.

[0055] 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. A power battery is a power source that provides power for tools. A 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, and for aerospace. Of course, the battery device can also be an energy storage battery. An energy storage battery 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 continuously increasing.

[0056] However, since the battery cells are usually connected only through a buffer layer, and the buffer layer is relatively soft, the initial binding force between the battery cells is small. During the transportation of the battery device, the main frequency of the battery module is low, resulting in limited effectiveness in resisting impact forces from multiple directions during transportation or use.

[0057] To alleviate the above problems, in the battery modules of the prior art, grooves are provided on the side walls of the end plates of the battery module, and weight blocks are provided in the grooves. When the weight or center of gravity of the battery module needs to be adjusted, the weight is adjusted by adding or reducing the weight blocks, thereby adjusting the main frequency of the battery module, improving the stable use ability of the battery module under different working conditions, and improving the anti-fatigue characteristics of the battery module. However, this solution has limited improvement in the main frequency of the battery device by enhancing the strength of the box frame. During actual vehicle operation, the battery device will vibrate. Moreover, its main weight comes from the battery cells, and the initial binding force between the battery cells only comes from the rebound stress of the buffer layer, so the main frequency of the battery module is low. The method of improving the main frequency by changing the center of gravity of the battery module with weights has a great impact on the weight of the battery device and a low upper limit of improvement.

[0058] Currently, there is also a design solution of bonding a composite strip on the top of the battery module to improve the main frequency of the battery module. It can effectively reduce the damage to the battery device caused by the expansion force and the Z-direction jumping force. However, due to the small bonding area of the strip, there is only a bonding area on the top of the battery cell, and the improvement of related performance is still limited.

[0059] Therefore, to solve the problem that during the transportation and use of the battery device, the main frequency of the battery module is low, resulting in the battery module or the battery device being prone to failure in resisting impact forces from multiple directions during transportation or use. This application designs a battery device, in which a rigid member is provided between two adjacent battery cells in the battery box, and the rigid member is fixedly connected to the two adjacent battery cells, thereby enhancing the binding force between the adjacent battery cells, increasing the main frequency of the battery module formed by multiple battery cells, and further improving the anti-impact ability of the battery device during vibration.

[0060] An embodiment of this application provides an electrical device 300, see Figure 1 , the electrical device includes a battery device 100 and an electrical component 200, and the battery device 100 is electrically connected to the electrical component 200. The battery device 100 is used to provide electrical energy for the electrical device 300 so that the electrical device 300 can operate.

[0061] The electrical device 300 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. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, a range-extended electric vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc. The electric toy includes a stationary 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 grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and a planer, etc. For the convenience of description in the following embodiments, the electrical device 300 is taken as an example of a vehicle for illustration.

[0062] The electrical component 200 can be an element or device that can use electricity; the electrical component 200 can be a controller and electronic components, etc. 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.

[0063] In some examples, the electrical device 300 can be a vehicle, and the electrical component 200 can be a vehicle lamp (such as a headlamp, a taillight, etc.), a display screen, an instrument panel, a control system (such as a controller), etc. The vehicle also includes a vehicle body, and both the battery device 100 and the electrical component 200 are installed on the vehicle body.

[0064] See Figures 2 to 10 , this application also provides a battery device 100. The battery device 100 provided in the embodiments of this application includes a battery box 10, a plurality of battery cells 20, and a rigid member 30. The plurality of battery cells 20 are accommodated in the battery box 10; the rigid member 30 is disposed between two adjacent battery cells 20; wherein, the rigid member 30 is fixedly connected to two adjacent battery cells 20.

[0065] Specifically, the battery box 10 has a receiving cavity 13, which can be used to accommodate a plurality of battery cells 20 and the rigid member 30. The battery box 10 can play a role in protecting the battery cells 20 and also facilitate gathering the plurality of battery cells 20 together. The shape of the battery box 10 can be specifically set according to needs. For example, the shape of the battery box 10 can be cylindrical, rectangular, etc.

[0066] In some embodiments, such as Figure 2As shown, the battery housing 10 may include a frame body 112, an upper cover body 12, and a lower cover body 111; the frame body 112 is connected between the upper cover body 12 and the lower cover body 111 to enclose a receiving cavity 13. The frame body 112 includes at least three side beams 1121, and the at least three side beams 1121 are connected end to end in sequence to form the frame body 112; for example, the number of side beams 1121 is four, and a rectangular frame body 112 can be formed. Two adjacent side beams 1121 are arranged in a cross manner, for example, two adjacent side beams 1121 are perpendicular. The upper cover body 12 is connected to the frame body 112 and can cover an opening of the frame body 112; the lower cover body 111 is connected to the frame body 112 and can cover another opening of the frame body 112; the upper cover body 12 and the lower cover body 111 are oppositely arranged along the height direction Y of the frame body 112. Among them, two adjacent side beams 1121 can be fixedly connected by welding or the like, or can be detachably connected.

[0067] In some embodiments, the battery housing 10 may include a lower housing 11 and an upper housing (not labeled in the figure) that can be covered, and the lower housing 11 and the upper housing together form a receiving cavity 13, which can be used to accommodate a plurality of battery cells 20 and rigid members 30. For example, the upper cover body 12 serves as the upper housing, and the interconnected lower cover body 111 and frame body 112 serve as the lower housing 11. For example, the lower cover body 111 can be a flat plate. The lower housing 11 may further include a bottom guard plate (not shown in the figure) and a cooling plate (not shown in the figure); the cooling plate is arranged on the frame body 112, and the bottom guard plate is arranged on the side of the cooling plate away from the frame body 112. For example, the lower housing 11 may further include a bottom plate (not shown in the figure), and the bottom plate is arranged between the frame body 112 and the cooling plate. Among them, the height direction Y of the frame body 112 and the height direction Y of the battery housing 10 are the same direction.

[0068] The plurality of battery cells 20 can be connected in series, in parallel, or in a hybrid connection. The plurality of battery cells 20 in the battery module can be electrically connected through a busbar component to achieve, for example, parallel, series, or hybrid connection of the plurality of battery cells 20 in the battery module.

[0069] The battery cell 20 can be a secondary battery, and a secondary battery refers to a battery cell 20 that can be activated by charging after the battery cell 20 is discharged and can continue to be used. The battery cell 20 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.

[0070] See Figure 11The battery cell 20 may include a housing 206, an electrode assembly 205, and a top cover 202. The housing 206 has a connected cavity and a mounting port. The number of electrode assemblies 205 may be one or more; the electrode assembly 205 is mounted in the cavity of the housing 206. The top cover 202 is connected to the housing 206 and covers the mounting port. The housing 206 is filled with an electrolyte, such as an electrolyte.

[0071] The electrode assembly 205 may include an anode electrode sheet and a cathode electrode sheet, and a separator (not shown) disposed between the anode electrode sheet and the cathode electrode sheet. During the charge and discharge process of the battery cell 20, active ions (such as lithium ions) are inserted and removed back and forth between the anode electrode sheet and the cathode electrode sheet. The separator can prevent the anode electrode sheet and the cathode electrode sheet from short-circuiting to a certain extent, and can allow active ions to pass through.

[0072] The battery cell 20 may further include a safety valve 204 (also referred to as a pressure relief valve), two poles 203 and two connecting members 201 (also referred to as current collecting members). The safety valve 204 may be provided on the top cover 202, for example, the safety valve 204 is fixed on the top cover 202, and the safety valve 204 is used to actuate when the internal pressure or temperature of the battery cell 20 reaches a threshold value to discharge the internal electrolyte to reduce the internal pressure or temperature of the battery cell 20. For example, the safety valve 204 may be a temperature-sensitive valve, a pressure-sensitive valve, etc.

[0073] Two poles 203 can be arranged on the top cover 202, and the two poles 203 protrude from the top cover 202, and the two poles 203 are respectively a positive pole and a negative pole. A connecting member 201 can be arranged between the pole 203 and the top cover 202, and one pole 203 is correspondingly connected to one connecting member 201. The connecting member 201 is located between the top cover 202 and the electrode assembly 205, and is used to electrically connect the electrode assembly 205 and the pole 203. The shell 206 is a hollow structure, and the material of the shell 206 can be metal or plastic; for example, the material of the shell 206 can be copper, iron, aluminum, steel, aluminum alloy, etc.

[0074] The rigid part 30 can be understood as a part formed of a rigid material with a certain hardness. For example, the rigid part 30 can be made of metal or resin-fiber composite material. The metal can be iron, aluminum, copper, etc. The resin-fiber composite material can be a carbon fiber reinforced resin composite material (CFRP), a glass fiber reinforced resin composite material (GFRP), etc. In addition, the rigid part 30 can also be a polymer material such as a thermoplastic material and a thermosetting material. At the same time, the rigid part 30 can be made by injection molding, machining, molding, stamping, die casting, etc.

[0075] The rigid member 30 can be used to enhance the rigid connection between two adjacent battery cells 20. The rigid member 30 is different from the buffer layer 40 provided between two adjacent battery cells 20, and its strength is greater than that of the buffer layer 40. A buffer layer 40 is provided between two battery cells 20 in adjacent rows and between two battery cells 20 in adjacent columns. The buffer layer 40 generally uses flexible materials such as foam, rubber, gel, fiber, etc., and it does not have rigid connection. Therefore, the connection between two adjacent battery cells 20 by the buffer layer 40 is generally a flexible or elastic connection.

[0076] That the rigid member 30 is disposed between two adjacent battery cells 20 can be understood as that the rigid member 30 is disposed between the sides of two adjacent battery cells 20. That the rigid member 30 is fixedly connected to two adjacent battery cells 20 can be understood as that the rigid member 30 and two adjacent battery cells 20 are connected into an integral structure, so that there is no relative movement between the rigid member 30 and two adjacent battery cells 20. When the rigid member 30 moves, two adjacent battery cells 20 and the rigid member 30 move together. For example, the fixed connection between the rigid member 30 and two adjacent battery cells 20 can be realized by means such as gluing and welding.

[0077] In an embodiment of the present application, as Figures 4 to 9 shown, by providing a rigid member 30 between two adjacent battery cells 20 and fixedly connecting the rigid member 30 to two adjacent battery cells 20, the bonding force between two adjacent battery cells 20 is increased, the main frequency of the battery module formed by multiple battery cells 20 is improved, and the shock resistance of the battery device 100 during vibration is enhanced.

[0078] In some embodiments, the rigid member 30 is fixedly connected to two adjacent battery cells 20 by structural adhesive. The rigid member 30 is specifically located between the sides of two adjacent battery cells 20. That the rigid member 30 is fixedly connected to two adjacent battery cells 20 by structural adhesive can be understood as that the side surface of the rigid member 30 and two adjacent battery cells 20 are bonded by structural adhesive, so as to be connected into an integral structure. Thus, the side surfaces of the rigid member 30 and two adjacent battery cells 20 can be bonded by structural adhesive to achieve fixation.

[0079] Among them, structural adhesive is an adhesive with high strength and durability, mainly used for connecting and fixing structural elements such as metal, glass, concrete, ceramics, etc. The main components of structural adhesive include: matrix, filler and additives. The matrix is usually a polymer material such as polyurethane, epoxy resin, acrylate, etc.; the filler is used to enhance the performance of the adhesive, and can adopt such as silica, alumina, etc. The additives generally include hardeners, stabilizers, accelerators, etc., and are used to adjust the curing speed and stability of the adhesive.

[0080] The structural adhesive has the following characteristics:

[0081] Strength and durability: The structural adhesive has excellent strength and durability, and can withstand tensile, shear and compressive forces in different directions, which can enhance the firmness of the connection part between the rigid member 30 and the two adjacent battery cells 20.

[0082] Adhesion: The structural adhesive can exhibit excellent adhesion on various surfaces, including metals, glasses, ceramics, etc., ensuring a firm and reliable connection.

[0083] Chemical resistance: The structural adhesive usually has good chemical resistance and can resist the erosion of chemical substances such as acids, alkalis, solvents, etc., maintaining the stability of the connection.

[0084] Weather resistance: In outdoor applications, the structural adhesive needs to have good weather resistance and can resist the influence of factors such as ultraviolet rays, temperature changes and humidity, ensuring the stability of the connection.

[0085] Elasticity: The structural adhesive usually has a certain elasticity and can quickly return to its original state after being stressed, providing effective shock and vibration resistance performance.

[0086] Impact resistance: The structural adhesive usually exhibits good impact resistance and can maintain the integrity of the connection when subjected to external impact or vibration. Thus, it can prevent the disconnection of the connection part between the rigid member 30 and the two adjacent battery cells 20, enhancing the firmness of the connection.

[0087] High temperature resistance: The structural adhesive has good high temperature resistance and is suitable for applications in high temperature environments, such as the connection of components inside the automotive engine compartment.

[0088] Low volatility: The structural adhesive usually exhibits low volatility, which helps to reduce the impact of volatile substances on the environment and health.

[0089] In an embodiment of the present application, the rigid member 30 and the two adjacent battery cells 20 are fixedly connected through the structural adhesive, which can not only increase the main frequency of the battery module formed by multiple battery cells 20, but also has a simple process and little damage to the housing of the battery cell 20.

[0090] In some embodiments, as Figures 5 to 9 shown, multiple battery cells 20 are arranged in a two-dimensional array; the rigid member 30 includes a connecting plate 31, one end of the connecting plate 31 is clamped between a group of two adjacent battery cells 20, and the other end of the connecting plate 31 is clamped between another group of two adjacent battery cells 20.

[0091] Specifically, multiple battery cells 20 are arranged in a two-dimensional array. That is, there are multiple battery cells 20 both in the row direction X and the column direction Z. The multiple battery cells 20 in the row direction X are vertically aligned, and the multiple battery cells 20 in the column direction Z are aligned at both left and right ends, so that the multiple battery cells 20 are arranged in multiple rows and columns. At the same time, the pole posts 203 of each battery cell 20 are arranged towards the upper cover 12, so that the two pole posts 203 of each battery cell 20 are adjacent to each other in the row direction X. Preferably, the two-dimensional array formed by the multiple battery cells 20 has at least 3 rows and 3 columns.

[0092] Clamped between two adjacent battery cells 20 by the connecting plate 31, the connecting plate 31 is tightly connected to the adjacent battery cells 20, which can increase the main frequency of the battery module formed by the multiple battery cells 20 and improve the anti-shock ability of the battery device 100 during vibration.

[0093] In an embodiment of the present application, as Figure 5 shown, the connecting plate 31 can be a single flat plate. One end of the connecting plate 31 is clamped between a group of two adjacent battery cells 20, and the other end is clamped between another group of two adjacent battery cells 20, so that the connecting plate 31 is fixedly connected to two adjacent groups of battery cells 20, forming a structure in which four battery cells 20 are connected as a whole. It increases the main frequency of the battery module formed by the multiple battery cells 20 and improves the anti-shock ability of the battery device 100 during vibration. And the connecting plate 31 is simple to manufacture and easy to disassemble and assemble.

[0094] That one end of the connecting plate 31 is clamped between a group of two adjacent battery cells 20 can be understood as that one end of the connecting plate 31 is clamped between two adjacent battery cells 20 in the column direction Z. That the other end of the connecting plate 31 is clamped between another group of two adjacent battery cells 20 can be understood as that the other end of the connecting plate 31 is clamped between another group of two adjacent battery cells 20 in the column direction Z. That is, each connecting plate 31 can be fixedly connected to two groups of four battery cells 20.

[0095] The length of the connecting plate 31 can be set as required. For example, as Figure 5 shown, the length of the connecting plate 31 is set to be relatively long, so that the connecting plate 31 can be clamped between two adjacent groups of battery cells 20. That is, one end of the connecting plate 31 can be clamped between a group of two adjacent battery cells 20, and the other end of the connecting plate 31 can be clamped between another group of two adjacent battery cells 20. And the side surface of the connecting plate 31 can be bonded to the side surfaces of the adjacent four battery cells 20 with structural adhesive, so that the connecting plate 31 fixedly connects the adjacent four battery cells 20 as a whole, to enhance the main frequency of the battery module formed by the four battery cells 20 and improve the anti-shock ability of the battery device 100 during vibration.

[0096] For another example, when the length of the connecting plate 31 is set to be relatively short, as Figure 6 shown, one connecting plate 31 is clamped between every two adjacent battery cells 20, and the side surface of the connecting plate 31 can be bonded to the side surfaces of the two adjacent battery cells 20 through structural adhesive, so that the connecting plate 31 fixedly connects the two adjacent battery cells 20 into one body, thereby enhancing the main frequency of the battery module formed by the two battery cells 20 and improving the anti-impact ability of the battery device 100 during vibration.

[0097] In some embodiments, as Figure 4 、 Figures 7 to 9 shown, two slits 23 arranged in a cross shape are formed among four battery cells 20 located in adjacent two rows and adjacent two columns; the rigid member 30 includes two connecting plates 31 arranged in a cross shape, and the two connecting plates 31 are arranged in one-to-one correspondence with the two slits 23.

[0098] The two slits 23 arranged in a cross shape formed among four battery cells 20 located in adjacent two rows and adjacent two columns can be understood as that the battery cells 20 in adjacent two rows are arranged at intervals with each other, and the two battery cells 20 in adjacent two columns are arranged at intervals with each other, so that among the four battery cells 20 arranged in an array in two rows and two columns, each battery cell 20 is arranged at intervals with each other, and the slit 23 formed in the row direction X and the slit 23 formed in the column direction Z are arranged in a cross shape with each other. The cross arrangement can be understood as that the two slits 23 are not arranged in parallel, but cross to form a certain angle. The cross arrangement is preferably a vertical arrangement or close to a vertical arrangement.

[0099] The rigid member 30 includes two connecting plates 31 arranged in a cross shape can be understood as that one of the two connecting plates 31 is arranged along the row direction X, and the other is arranged along the column direction Z, and the two connecting plates 31 are arranged to cross each other to form a certain angle, preferably the two connecting plates 31 are vertically arranged.

[0100] The two connecting plates 31 are arranged in one-to-one correspondence with the two slits 23 can be understood as that, for example, one connecting plate 31 is inserted into one slit 23, and the other connecting plate 31 is inserted into the other slit 23.

[0101] Specifically, as Figures 7 to 9 shown, the two connecting plates 31 arranged in a cross shape can form a rigid member 30 in an L shape, a T shape or a cross shape, and every two connecting plates 31 are arranged in one-to-one correspondence with the two slits 23, thereby improving the connection strength of the four battery cells 20 in adjacent two rows and adjacent two columns, enhancing the main frequency of the formed battery module, and improving the anti-impact ability of the battery device 100 during vibration.

[0102] In one embodiment of the present application, for example, when four battery cells 20 are arranged in a two-dimensional array, two intersecting slits 23 formed can be perpendicular to each other, forming a cross-shaped slit 23. The two connecting plates 31 of the rigid member 30 are also arranged in a cross shape, forming a cross-shaped rigid member 30 corresponding to the cross-shaped slit 23, so that the rigid member 30 can be correspondingly inserted into the two intersecting slits 23.

[0103] In some embodiments, as Figure 10 shown, the two connecting plates 31 are perpendicularly crossed and have four free ends 310; a sub-slit 24 is formed between any two adjacent battery cells 20 in the same row or the same column, and four battery cells 20 in adjacent two rows and two columns form four sub-slits 24; the four free ends 310 are correspondingly arranged in the four sub-slits 24.

[0104] The perpendicular crossing of the two connecting plates 31 can be understood as the two connecting plates 31 being arranged at a perpendicular angle, and the plates of the two connecting plates 31 have intersections, overlaps, and a shared part of the structure, rather than the ends of the two connecting plates 31 being perpendicularly arranged. Preferably, the middle parts of the two connecting plates 31 are perpendicularly crossed.

[0105] The four free ends 310 can be understood as that the relative two ends of each connecting plate 31 are defined as two free ends 310, and the two connecting plates 31 have four free ends 310.

[0106] Specifically, the two connecting plates 31 are perpendicularly crossed and have four free ends 310, which can further form a cross-shaped rigid member 30. When multiple battery cells 20 are arranged in a two-dimensional array, a sub-slit 24 can be formed at intervals between every two adjacent battery cells 20, and four sub-slits 24 can be formed at intervals between every four battery cells 20 arranged in a two-dimensional array. The four sub-slits 24 are arranged in a cross shape. The four free ends 310 of the cross-shaped rigid member 30 are correspondingly arranged with the four sub-slits 24 formed between the four battery cells 20, which can be understood as that each of the four free ends 310 formed by the perpendicular arrangement of the two connecting plates 31 is inserted into a sub-slit 24, so that the four free ends 310 can be correspondingly inserted into the four sub-slits 24. Each free end 310 of the rigid member 30 can be connected to the adjacent battery cells 20, with a larger connection contact area, further improving the connection strength between adjacent battery cells 20, increasing the binding force between two adjacent battery cells 20, increasing the main frequency of the module formed by multiple battery cells 20, and enhancing the anti-shock ability of the battery device 100 during vibration.

[0107] In some embodiments, as Figures 12 to 14As shown, at the intersection of the two connecting plates 31, the top of the connecting plate 31 has a notch 32; along the direction from the top to the bottom of the connecting plate 31, the width of the notch 32 decreases.

[0108] The intersection of the two connecting plates 31 can be understood as the position where the two connecting plates 31 are cross - arranged. That the top of the connecting plate 31 has a notch 32 can be understood as that there is one or more specially designed depressions or incisions at the top end face position of the connecting plate 31.

[0109] That along the direction from the top to the bottom of the connecting plate 31, the width of the notch 32 decreases can be understood as that along the top to the bottom of the connecting plate 31, that is, along the height direction Y, the width of the notch 32 gradually becomes smaller. For example, the width of the notch 32 can decrease uniformly or decrease in an irregular shape.

[0110] Specifically, before the connecting plate 31 is inserted into the gap 23, the connecting plate 31 can be cut in advance to form the notch 32 at the top of the connecting plate 31 for easy processing. At the same time, cutting the notch 32 in advance can improve the problem of the impact on other components caused by processing the notch 32 after inserting it into the gap 23.

[0111] In an embodiment of the present application, by opening the notch 32 and setting the structure of the notch 32 to decrease in width from the top to the bottom of the connecting plate 31, it is convenient to inject structural adhesive from the notch 32, thereby improving the connection effect between the connecting plate 31 and the battery cell 20.

[0112] In some embodiments, along the direction from the top to the bottom of the connecting plate 31, the width of the notch 32 gradually decreases or decreases in a stepped manner.

[0113] Specifically, as Figure 13 shown, that the width of the notch 32 gradually decreases can be understood as that the notch 32 decreases uniformly in a straight line from the top to the bottom of the connecting plate 31, so that the notch 32 can form an oblique angle, making the side surface of the connecting plate 31 form an arc surface or an inclined surface. For example, if the notch 32 decreases uniformly in a straight line from the top to the bottom of the connecting plate 31 (that is, along the height direction Y), an inclined surface can be formed; if the notch 32 decreases uniformly in a curved line from the top to the bottom of the connecting plate 31 (that is, along the height direction Y), an arc surface can be formed.

[0114] As Figure 14 shown, that the width of the notch 32 decreases in a stepped manner can be understood as that the notch 32 decreases in a stepped shape from the top to the bottom of the multiple connecting plates 31, forming a stepped groove with a stepped surface, that is, the side wall of the notch 32 of the connecting plate 31 forms a stepped shape.

[0115] In an embodiment of the present application, the width of the notch 32 gradually decreases or decreases in a stepped manner, so as to guide the flow direction of the structural adhesive during the injection process of the structural adhesive and improve the accuracy of injecting the structural adhesive. At the same time, inserting the connecting plate 31 first and then injecting the glue can prevent the structural adhesive from being scraped off by the battery cell 20 or the problem of poor glue application during the insertion process of the connecting plate 31. It can be understood that in other embodiments, the notch 32 may also be irregular or decrease in other forms from the top to the bottom of the connecting plate 31.

[0116] In some embodiments, as Figure 15 shown, along the direction from the top to the bottom of the connecting plate 31, the width of the bottom end of the connecting plate 31 gradually decreases.

[0117] The bottom end of the connecting plate 31 can be understood as the end of the connecting plate 31 away from the top cover 202. The gradually decreasing width can be understood as the width gradually becoming narrower. For example, along the direction from the top to the bottom of the connecting plate 31 (i.e., along the height direction Y), the width of the bottom end of the connecting plate 31 uniformly becomes smaller or becomes smaller in an irregular shape.

[0118] Specifically, the gradually decreasing width of the bottom end of the connecting plate 31 can form an inclined surface or an arc surface, so as to reduce the resistance during the assembly of the connecting plate 31, make the assembly more convenient, and facilitate the disassembly and assembly of the connecting plate 31.

[0119] In a further embodiment, as Figure 15 shown, along the direction from the top to the bottom of the connecting plate 31, an inclined angle 311 is formed at the bottom end of the connecting plate 31.

[0120] Forming an inclined angle 311 at the bottom end of the connecting plate 31 can be understood as cutting one corner of the bottom end of the connecting plate 31 to form a corner with a hypotenuse. The inclined angle 311 is different from the corner with an arc edge, and the edge of the inclined angle 311 is a straight line.

[0121] In an embodiment of the present application, along the height direction Y, the design of the inclined angle 311 at the bottom end of the connecting plate 31 improves the process convenience of assembling the connecting plate 31 after the battery module is formed. Forming an inclined angle 311 at the bottom end of the connecting plate 31 can make it more convenient for the connecting plate 31 to be directly inserted into the gap 23 formed between adjacent battery cells 20.

[0122] In some embodiments, as Figure 4 、 Figure 9 and Figure 12 shown, two intersecting gaps 23 are defined as a fork gap 230, and multiple battery cells 20 are arranged to form multiple fork gaps 230; a rigid member 30 is provided at each fork gap 230.

[0123] The cross-slots 230 can be understood as slots arranged in a cross pattern, for example, two slots 23 are arranged in a cross pattern. When multiple battery cells 20 are arranged at intervals of each other, multiple slots 23 can be formed. When multiple slots 23 are arranged in a cross pattern, multiple cross-slots 230 can be formed.

[0124] Arranging a rigid member 30 at each cross-slot 230 can be understood as inserting a cross-shaped rigid member 30 into each cross-slot 230.

[0125] In a specific embodiment, when multiple battery cells 20 are arranged in a two-dimensional array, multiple mutually perpendicular cross-shaped cross-slots 230 can be formed, so that the rigid members 30 formed by the connecting plates 31 arranged in a cross pattern can be correspondingly inserted into each cross-slot 230, and further enable the side surfaces of each connecting plate 31 to be fixedly connected to adjacent battery cells 20, for example, by bonding with structural adhesive.

[0126] In an embodiment of the present application, arranging a rigid member 30 at each cross-slot 230 further increases the main frequency of the battery module formed by multiple battery cells 20, and further improves the anti-shock ability of the battery device 100 during vibration.

[0127] In some embodiments, as Figure 4 and Figure 12 shown, the top end of the rigid member 30 is higher than the top cover 202 and lower than the pole post 203.

[0128] The top end of the rigid member 30 can be understood as the end of the rigid member 30 far from the slot 23. The top end of the rigid member 30 being higher than the top cover 202 and lower than the pole post 203 can be understood as the top end of the rigid member 30 being higher than the top end of the top cover 202 and lower than the top end of the pole post 203; that is, the top end of the rigid member 30 can be located between the top end of the top cover 202 and the top end of the pole post 203.

[0129] Specifically, the height of the pole post 203 can be higher than the height of the top cover 202. And setting the top end of the rigid member 30 to be higher than the top cover 202 and lower than the pole post 203 facilitates the installation operation, is more convenient to insert the rigid member 30 after the battery module is formed, and reduces the interference with other components (such as the upper cover 12 of the battery box 10).

[0130] In some embodiments, as Figures 4 to 9 shown, the ratio of the height of the rigid member 30 to the height of the battery cell 20 is greater than or equal to 0.3 and less than or equal to 0.8.

[0131] The height of the rigid member 30 can be understood as the vertical distance from the bottom end to the top end of the rigid member 30 along the height direction Y when the rigid member 30 is arranged between two adjacent battery cells 20.

[0132] The height of the battery cell 20 can be understood as the vertical distance between the bottom surface of the battery cell 20 close to the lower cover 111 and the top surface of the top cover 202 of the battery cell 20 when the battery cell 20 is placed in the accommodation cavity 13 and the two pole posts 203 are arranged facing the upper cover 12. For example, Figure 2 the height of the rigid member 30 is H1, the height of the battery cell 20 is H2, and the ratio of H1 to H2 is greater than or equal to 0.3 and less than or equal to 0.8. For example, the ratio is 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc.

[0133] In an embodiment of the present application, the ratio of the height of the rigid member 30 to the height of the battery cell 20 is greater than or equal to 0.3 and less than or equal to 0.8, which can ensure that the rigid member 30 and the battery cell 20 have sufficient connection strength and reduce the weight of the rigid member 30 attached to the battery cell 20, thereby reducing the weight of the battery device 100.

[0134] In some embodiments, as Figures 2 to 12 shown, the battery cell 20 is rectangular, and the width of the overlapping area between the rigid member 30 and the side surface of the battery cell 20 is greater than or equal to 10 mm and less than or equal to 20 mm.

[0135] The side surface of the battery cell 20 can be understood as the surface except for the top surface of the top cover 202 and the bottom surface opposite to the top cover 202, and the side surface of the battery cell 20 includes the surface in contact with the rigid member 30.

[0136] The overlapping area between the rigid member 30 and the side surface of the battery cell 20 can be understood as that among the surfaces in contact between the rigid member 30 and the battery cell 20, there are some overlapping surfaces. The battery cell 20 has a long side 21 and a short side 22, and this overlapping area exists on both the long side 21 and the short side 22.

[0137] As Figure 9 shown, the width of the overlapping area between the long side 21 of the battery cell 20 and the rigid member 30 is R1, and the width of the overlapping area between the short side 22 of the battery cell 20 and the rigid member 30 is R2. The width R1 of the overlapping area between the rigid member 30 and the long side 21 of the adjacent battery cell 20 and the width R2 of the overlapping area between the rigid member 30 and the short side 22 of the adjacent battery cell 20 can both be greater than or equal to 10 mm and less than or equal to 20 mm, such as 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 19 mm, 20 mm, etc.

[0138] The width of the overlapping area between the rigid member 30 and the side surface of the battery cell 20 is greater than or equal to 10 mm and less than or equal to 20 mm, so that the rigid member 30 and the battery cell 20 have sufficient connection strength and reduce the interference with the buffer layer 40, enabling the buffer layer 40 to have sufficient width and installation space. It can be understood that in other embodiments, the battery cell 20 can also be set to other shapes according to needs.

[0139] In some embodiments, the rigid member 30 can be a metal structural member or a resin-fiber composite structural member. For example, the metal can be iron, aluminum, copper, etc. The resin-fiber composite material can be carbon fiber reinforced resin composite material (CFRP), glass fiber reinforced resin composite material (GFRP), etc.

[0140] The use of metal or resin-fiber composite material for the rigid member 30 can enhance the support of the rigid member 30, so that the support strength of the rigid member 30 is greater than that of the buffer layer 40, increase the main frequency of the battery module formed by multiple battery cells 20, and improve the anti-impact ability of the battery device 100 during vibration. In other embodiments, the rigid member 30 can also be a polymer material such as thermoplastic material, thermosetting material, etc. At the same time, the rigid member 30 can be made by processes such as injection molding, machining, molding, stamping, die casting, etc.

[0141] The above are only the embodiments of the present application, and do not limit the patent 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 in 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; A plurality of battery cells, accommodated within the battery box body; A rigid member, disposed between two adjacent battery cells; wherein, the rigid member is fixedly connected to the two adjacent battery cells; Wherein, the plurality of battery cells are arranged in a two-dimensional array, and four battery cells located in two adjacent rows and two adjacent columns form two intersecting gaps; the number of the rigid members is plural, and each rigid member is correspondingly disposed within the two intersecting gaps formed by the four battery cells.

2. The battery device according to claim 1, wherein The rigid member is fixedly connected to the two adjacent battery cells by structural adhesive.

3. The battery device according to claim 1, wherein The rigid member includes a connecting plate, one end of the connecting plate is clamped between a group of two adjacent battery cells, and the other end of the connecting plate is clamped between another group of two adjacent battery cells.

4. The battery device according to claim 3, wherein The rigid member includes two intersecting connecting plates, and the two connecting plates are correspondingly disposed with the two gaps one by one.

5. The battery device according to claim 4, wherein The two connecting plates are vertically crossed and have four free ends; a sub-gap is formed between any two adjacent battery cells located in the same row or the same column, and four sub-gaps are formed by four battery cells located in two adjacent rows and two adjacent columns; the four free ends are correspondingly disposed within the four sub-gaps one by one.

6. The battery device according to claim 5, wherein At the intersection of the two connecting plates, the top of the connecting plate has a notch; along the direction from the top to the bottom of the connecting plate, the width of the notch decreases.

7. The battery device according to claim 6, wherein Along the direction from the top to the bottom of the connecting plate, the width of the notch gradually decreases or decreases in a stepped manner.

8. The battery device according to any one of claims 3-7, wherein Along the direction from the top to the bottom of the connecting plate, the width of the bottom end of the connecting plate gradually decreases.

9. The battery device according to claim 8, wherein Along the direction from the top to the bottom of the connecting plate, the bottom end of the connecting plate forms an oblique angle.

10. The battery device according to any one of claims 4-7, wherein The two intersecting gaps are defined as a fork gap, and the plurality of battery cells are arranged to form a plurality of fork gaps; one rigid member is disposed at each fork gap.

11. The battery device according to any one of claims 1-7, wherein The battery cell includes a top cover and a pole column located on the top cover; the top end of the rigid member is higher than the top cover and lower than the pole column.

12. The battery device according to any one of claims 1-7, wherein The ratio of the height of the rigid member to the height of the battery cell is greater than or equal to 0.3 and less than or equal to 0.

8.

13. The battery device according to any one of claims 1-7, characterized in that the battery cell is rectangular, and the width of the overlapping area between the rigid member and the side surface of the battery cell is greater than or equal to 10 mm and less than or equal to 20 mm.

14. The battery device according to any one of claims 1-7, characterized in that the rigid member is a metal structural member or a resin / fiber composite structural member.

15. An electrical device, characterized in that, Comprising: an electrical appliance; the battery device according to any one of claims 1-14; the battery device is electrically connected to the electrical appliance.

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