Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a battery monomer, a box body and a filling medium, the battery monomers are located in the box body, the box body comprises a beam body, and a cavity is formed in the beam body; and the filling medium comprises a plurality of granular filling units, and the filling medium is filled in the cavity. The box body is constructed by the beam body with the cavity, so that the weight of the box body can be well reduced, and the lightweight design of the box body is facilitated. By filling the beam body of the box body with the plurality of granular filling units, dynamic load can be well absorbed and consumed, the beam body can be well supported, the structural strength of the beam body is effectively improved, and when the beam body is broken due to impact, the granular filling units in the beam body can also be released from the gap of the broken part, so that the service life of the beam body is prolonged, and the service life of the beam body is prolonged. Impact force can be better consumed, and damage caused by impact or impact is further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0003] As the market demand for power batteries increases, the requirements for power battery performance are also constantly improving. Under the premise of ensuring battery safety and stability, achieving lightweight housing has become an important research direction. However, the lightweight process is likely to affect the structural strength of the housing. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the first object of the present application is to provide a battery device, which can realize a lightweight design of the box body and also make the box body have good structural strength.

[0005] The second objective of the present application is to provide an electrical device.

[0006] According to the first aspect of the present application, the battery device includes: a battery cell, a box body and a filling medium, wherein the battery cell is located in the box body, the box body includes a beam body, the beam body has a cavity, the filling medium includes a plurality of granular filling units, and the filling medium is filled in the cavity.

[0007] In the above technical solution, by making the beam body with a cavity to construct a box body, the weight of the box body can be reduced well, which is conducive to the lightweight design of the box body. By filling a plurality of granular filling units in the beam body of the box body, the dynamic load can be better absorbed and consumed, and the beam body can be better supported, effectively improving the structural strength of the beam body. Moreover, when the beam body is subjected to impact and fracture, the granular filling units inside the beam body can also be released from the gap of the fracture, which can better consume the impact force and further reduce the damage caused by the collision or impact.

[0008] In addition, the battery device according to the present application may also have the following additional technical features:

[0009] In some embodiments of the present application, there are a plurality of cavities, the plurality of cavities are spaced apart along a first direction, and the filling medium is filled in at least one of the cavities.

[0010] In the above technical solution, when there are multiple cavities, different positions and numbers of cavities can be filled according to the actual layout of the cavities and the stress state of the beam, which can not only improve the structural strength of the beam, but also help to further reduce the weight of the beam.

[0011] In some embodiments of the present application, the box body includes a bottom plate and a plurality of side beams connected to the outer periphery of the bottom plate, and at least one of the side beams is the beam body.

[0012] In the above technical solution, the filling medium can increase the rigidity of the side beam and reduce deformation when subjected to external forces (such as collision). This helps to protect the battery module from physical damage, thereby extending the battery life; in the event of a collision, the filling medium can absorb part of the impact energy and reduce the impact force transmitted to the battery module, which helps to reduce the risk of battery short circuit or thermal runaway; the filling medium can absorb vibration energy and reduce the mutual collision between the internal components of the battery system, which helps to reduce mechanical wear and improve the overall life of the battery system.

[0013] In some embodiments of the present application, the first direction is the thickness direction of the box body, the side beam comprises a first cavity and a second cavity separated along the first direction, the first cavity is located on the side of the second cavity away from the bottom plate, the box body also includes a mounting beam connected to the side beam, at least a portion of the mounting beam is arranged opposite to the first cavity, and the filling medium is filled in the first cavity.

[0014] In the above technical solution, a granular filling medium can be filled in the first cavity where the side beam and the mounting beam are connected. By improving the structural strength of the side beam at the first cavity, the connection strength between the side beam and the mounting beam can be improved, thereby ensuring the reliability of the connection between the side beam and the mounting beam.

[0015] In some embodiments of the present application, in the first direction, a portion of the mounting beam extends to a position opposite to the second cavity, and the filling medium is filled in the second cavity.

[0016] In the above technical solution, different positions and numbers of cavities can be filled according to the actual arrangement position of the cavities and the stress state of the beam body, which can not only improve the structural strength of the beam body, but also help to further reduce the weight of the beam body.

[0017] In some embodiments of the present application, the volume of the first cavity is smaller than the volume of the second cavity.

[0018] In the above technical solution, the mounting beam is installed at the position of the first cavity of the side beam. By making the size of the first cavity smaller, the structural strength of the side beam at the first cavity can be better improved, and the connection reliability of the mounting beam and the side beam can be effectively improved.

[0019] In some embodiments of the present application, the cavity is completely filled with the filling medium.

[0020] In the above technical solution, by completely filling the cavity with a filling medium, the structural strength of the beam body can be improved, especially for the beam body of a roll-formed vehicle, the structural strength of the roll-formed fillet can be improved, so that the roll-formed fillet is not easy to crack under stress, thereby improving the reliability of the beam body.

[0021] In some embodiments of the present application, in the length direction of the beam body, the filling medium is filled in the middle of the cavity.

[0022] In the above technical solution, by filling the filling medium in the middle part of the length direction of the beam body, the structural strength of the part can be improved, so that the beam body is not easy to deform, and the use of the filling medium can be reduced, which can reduce the cost and reduce the weight of the beam body, which is conducive to the lightweight design of the beam body.

[0023] In some embodiments of the present application, the shape of the filling unit in the first cavity is the same as or different from the shape of the filling unit in the second cavity, and the volume of the filling unit in the first cavity is the same as or different from the volume of the filling unit in the second cavity.

[0024] In the above technical solution, the shape of the filling unit can be flexibly configured, so that the beam body can be configured with filling units of different particles according to actual conditions, thereby meeting different actual needs.

[0025] In some embodiments of the present application, the filling unit is a sphere and / or the filling unit is a polyhedron. When the filling unit is a polyhedron, each face of the polyhedron has the same shape and / or an equal area.

[0026] In the above technical solution, the shape of the filling unit can be flexibly configured, so that the beam body can be configured with filling units of different particles according to actual conditions, thereby meeting different actual needs.

[0027] In some embodiments of the present application, the beam body is an integral piece formed by roll forming of a metal plate.

[0028] In the above technical solution, by making the beam body an integral part formed by roll-forming a metal plate, the beam body can have good structural strength, tensile strength and bending strength, and the processing difficulty is low, and the production cost of the beam body can be reduced.

[0029] In some embodiments of the present application, the beam body includes a partition plate connected to two opposite side plates of the beam body, and the partition plate is used to separate at least two cavities in the beam body.

[0030] In the above technical solution, by constructing a partition plate in the beam body, the partition plate can improve the structural strength inside the beam body, thereby facilitating improving the structural strength of the beam body.

[0031] In some embodiments of the present application, the filling unit is a hollow granular structure.

[0032] In the above technical solution, by making the filling unit a hollow granular structure, it is not only beneficial to the lightweight design of the beam body, but also can better improve the performance of the beam body, and then improve the reliability of the beam body and the box body, thereby effectively protecting the battery cells in the box body.

[0033] In some embodiments of the present application, the granular structure is a rigid granular structure.

[0034] In the above technical solution, the structural strength of the beam body can be effectively improved by making the granular structure a rigid granular structure.

[0035] In some embodiments of the present application, a bonding member is further provided in the cavity, and the bonding member is used to bond at least two of the filling units.

[0036] In the above technical solution, by adding bonding parts, the structural strength of the beam body can be improved and the mechanical wear inside the beam body can be effectively reduced.

[0037] The present application also provides an electrical device.

[0038] In some embodiments of the present application, the electrical device includes a battery device, and the battery device is used to store or provide electrical energy.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0041] Figure 1Schematic diagram of a vehicle provided for some embodiments of the present application.

[0042] Figure 2 This is a schematic diagram of the structure of the box of the battery device of some embodiments of the present application.

[0043] Figure 3 A top view of a box of a battery device according to some embodiments of the present application.

[0044] Figure 4 for Figure 3 Sectional view along line AA.

[0045] Figure 5 yes Figure 4 Magnified view of area B.

[0046] Figure 6 yes Figure 5 Schematic diagram of removing the filling medium.

[0047] Reference numerals:

[0048] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0049] 10. Box body; 11. Beam body; 12. Cavity; 121. First cavity; 122. Second cavity; 13. Side beam; 131. Partition plate; 14. Mounting beam; 15. Bottom plate;

[0050] 20. Filling medium; 21. Filling unit. DETAILED DESCRIPTION

[0051] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0052] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0055] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0056] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0057] As the market demand for power batteries increases, the requirements for power battery performance are also constantly improving. Under the premise of ensuring battery safety and stability, achieving lightweight housing has become an important research direction. However, the lightweight process is likely to affect the structural strength of the housing.

[0058] Based on the above considerations, in order to avoid affecting the structural strength while reducing the weight of the box 10, a battery device 100 is designed. The box 10 of the battery device 100 has a cavity 12. By filling a plurality of granular filling units 21 in the beam 11 of the box 10, the plurality of granular filling units 21 can absorb vibration energy well, so that when the box 10 is subjected to a dynamic load, the plurality of granular filling units 21 can absorb and consume the vibration energy transmitted to the beam 11, so that the beam 11 has good stability and reliability when subjected to a dynamic load. Further, when the beam 11 is subjected to a collision or impact, the beam 11 may be partially deformed under the action of an external force, and the granular filling units 21 inside the beam 11 can provide effective support to the beam 11, thereby improving the structural strength of the beam 11. Further, when the beam 11 is subjected to a collision or impact and breaks, the granular filling units 21 inside the beam 11 can also be released from the gap of the fracture, which can well consume the impact force and further reduce the damage caused by the collision or impact. Therefore, by filling a plurality of granular filling units 21 in the beam body 11 of the box body 10 , the weight of the box body 10 can be reduced to a good extent, which is beneficial to the lightweight design of the box body 10 , while also ensuring the structural strength of the box body 10 .

[0059] The box 10 disclosed in the present application can be used for an electric device using a battery as a power source or various energy storage systems using a battery as an energy storage element. The electric device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0060] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0061] Reference Figure 1 , Figure 1A schematic diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The battery device 100 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery to power the motor 300, for example, for the working power requirements of the vehicle 1000 during starting, navigation and driving.

[0062] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] refer to Figure 2-Figure 6 , Figure 2 Schematic diagram of the structure of the box 10 of the battery device 100 according to some embodiments of the present application. Figure 3 FIG. 1 is a top view of a casing 10 of a battery device 100 according to some embodiments of the present application. Figure 4 for Figure 3 Sectional view along line AA. Figure 5 yes Figure 4 Magnified view of area B. Figure 6 yes Figure 5 Schematic diagram of removing the filling medium 20.

[0064] The battery device 100 includes a battery cell (not shown in the figure), a box body 10 and a filling medium 20. The battery cell is located in the box body 10. The box body 10 includes a beam body 11. The beam body 11 has a cavity 12. The filling medium 20 includes a plurality of granular filling units 21. The filling medium 20 is filled in the cavity 12.

[0065] That is to say, the battery cell can be placed in the box body 10, and the box body 10 can protect the battery cell to prevent the battery cell from being damaged. The beam body 11 has a cavity 12, which can reduce the weight of the beam body 11. By constructing the box body 10 with the beam body 11 having the cavity 12, the weight of the box body 10 can be reduced, which is conducive to the lightweight design of the box body 10.

[0066] Furthermore, by filling the cavity 12 with a filling medium 20, the filling medium 20 includes a plurality of granular filling units 21, and the plurality of granular filling units 21 can absorb vibration energy well, so that when the box body 10 is subjected to a dynamic load, the plurality of granular filling units 21 can absorb and consume the vibration energy transmitted to the beam body 11, so that the beam body 11 has good stability and reliability when subjected to a dynamic load. Furthermore, when the beam body 11 is subjected to a collision or impact, the beam body 11 may be partially deformed under the action of an external force, and the granular filling units 21 inside the beam body 11 can provide effective support to the beam body 11, thereby improving the structural strength of the beam body 11. Furthermore, when the beam body 11 is subjected to a collision or impact and breaks, the granular filling units 21 inside the beam body 11 can also be released from the gap of the fracture, which can better consume the impact force and further reduce the damage caused by the collision or impact. Therefore, by filling a plurality of granular filling units 21 in the beam body 11 of the box body 10 , the weight of the box body 10 can be reduced to a good extent, which is beneficial to the lightweight design of the box body 10 , while also ensuring the structural strength of the box body 10 .

[0067] In the above technical solution, by making the beam body 11 with the cavity 12 to construct the box body 10, the weight of the box body 10 can be reduced well, which is conducive to the lightweight design of the box body 10. By filling a plurality of granular filling units 21 in the beam body 11 of the box body 10, the dynamic load can be better absorbed and consumed, and the beam body 11 can be better supported, effectively improving the structural strength of the beam body 11, and when the beam body 11 is subjected to impact and fractured, the granular filling units 21 inside the beam body 11 can also be released from the gap of the fracture, which can better consume the impact force and further reduce the damage caused by the collision or impact.

[0068] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0069] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0070] In some embodiments of the present application, Figure 5 and Figure 6 As shown, there are a plurality of cavities 12 , and the plurality of cavities 12 are spaced apart from each other along the first direction X1 , and the filling medium 20 is filled in at least one of the cavities 12 .

[0071] For example, the filling medium 20 may be filled in one cavity 12 .

[0072] For example, the filling medium 20 may be filled in two or more cavities 12 .

[0073] In the above technical solution, when there are multiple cavities 12, different positions and numbers of cavities 12 can be filled according to the actual arrangement position of the cavities 12 and the stress state of the beam body 11. For example, there are multiple cavities 12, and the force is concentrated near one cavity 12 of the beam body 11, while the force at the remaining cavities 12 is relatively small. In this way, only the cavities 12 at the concentrated force positions can be filled with granular filling medium 20. In this way, not only the structural strength of the beam body 11 can be improved, but also the weight of the beam body 11 can be further reduced.

[0074] In some embodiments of the present application, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the box body 10 includes a bottom plate 15 and a plurality of side beams 13 connected to the outer periphery of the bottom plate 15 , and at least one of the side beams 13 is a beam body 11 .

[0075] Exemplarily, the box body 10 is a rectangular structure, and has four side beams 13, which are respectively two side beams 13 opposite to each other along the second direction X2 and two side beams 13 opposite to each other along the third direction X3. Therefore, the filling medium 20 can be set in both the two side beams 13 opposite to each other along the second direction X2, or in both the two side beams 13 opposite to each other along the third direction X3, or in all four side beams 13.

[0076] In the above technical solution, the filling medium 20 can increase the rigidity of the side beam 13 and reduce deformation when subjected to external forces (such as collision). This helps to protect the battery module from physical damage, thereby extending the battery life; in the event of a collision, the filling medium 20 can absorb part of the impact energy and reduce the impact force transmitted to the battery module, which helps to reduce the risk of battery short circuit or thermal runaway; the filling medium 20 can absorb vibration energy and reduce the mutual collision between the internal components of the battery system, which helps to reduce mechanical wear and improve the overall life of the battery system.

[0077] In some embodiments of the present application, Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the first direction X1 is the thickness direction of the box body 10, and the side beam 13 has a first cavity 121 and a second cavity 122 separated along the first direction X1. The first cavity 121 is located on the side of the second cavity 122 away from the bottom plate 15. The box body 10 also includes a mounting beam 14 connected to the side beam 13, at least a portion of the mounting beam 14 is arranged opposite to the first cavity 121, and the filling medium 20 is filled in the first cavity 121.

[0078] Exemplarily, the mounting beam 14 is connected to the outside of the first cavity 121, that is, the wall panel corresponding to the first cavity 121 is the connection position between the side beam 13 and the mounting beam 14. In order to improve the mechanical properties of the side beam 13 at this location, only the granular filling medium 20 can be filled in the first cavity 121, thereby improving the structural strength of the side beam 13 in the corresponding area of ​​the first cavity 121.

[0079] In the above technical solution, a granular filling medium 20 can be filled in the first cavity 121 where the side beam 13 and the mounting beam 14 are connected. By improving the structural strength of the side beam 13 at the first cavity 121, the connection strength between the side beam 13 and the mounting beam 14 can be improved, thereby ensuring the reliability of the connection between the side beam 13 and the mounting beam 14.

[0080] In some embodiments of the present application, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in the first direction X1 , a portion of the mounting beam 14 extends to a position opposite to the second cavity 122 , and the filling medium 20 is filled in the second cavity 122 .

[0081] Exemplarily, most of the mounting beam 14 is installed on the outside of the wall panel where the first cavity 121 is located, and in the first direction X1, a small part of the mounting beam 14 is connected to the outside of the wall panel where the second cavity 122 is located.

[0082] Exemplarily, the mounting beam 14 is integrally formed of a metal plate by rolling, and the mounting beam 14 has a cavity. The mounting beam 14 also has a flange welded to the side beam 13, and the flange includes a first flange welded to the wall panel where the first cavity 121 is located, and a second flange welded to the wall panel where the second cavity 122 is located. By filling the first cavity 121 and the second cavity 122 with a filling medium 20, the structural strength of the side beam 13 at the first cavity 121 and the second cavity 122 can be improved, and the connection strength between the side beam 13 and the mounting beam 14 can be improved, thereby ensuring the reliability of the connection between the side beam 13 and the mounting beam 14.

[0083] In the above technical solution, different positions and numbers of cavities 12 can be filled according to the actual arrangement position of the cavities 12 and the stress state of the beam body 11, which can not only improve the structural strength of the beam body 11 but also help to further reduce the weight of the beam body 11.

[0084] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the volume of the first cavity 121 is smaller than the volume of the second cavity 122 .

[0085] Exemplarily, the box body 10 is a rectangular parallelepiped, the beam body 11 is the beam body 11 of the box body 10 in the second direction X2, and in the cross section formed by the straight line in the first direction X1 and the straight line in the second direction X2, the cross section of the first cavity 121 and the cross section of the second cavity 122 are both rectangular, and the cross section size of the first cavity 121 is smaller than the cross section size of the second cavity 122 in the second direction X2. Optionally, the cross section of the first cavity 121 and the cross section of the second cavity 122 are different in shape (for example, the cross section of the first cavity 121 is a trapezoid, and the cross section of the second cavity 122 is a rectangle), and the cross section size of the first cavity 121 is smaller than the cross section size of the second cavity 122 in the second direction X2.

[0086] In the above technical solution, the mounting beam 14 is installed at the position of the first cavity 121 of the side beam 13. By making the size of the first cavity 121 smaller, the structural strength of the side beam 13 at the first cavity 121 can be better improved, and the connection reliability of the mounting beam 14 and the side beam 13 can be effectively improved.

[0087] In some embodiments of the present application, the cavity 12 is completely filled with the filling medium 20 .

[0088] Exemplarily, the beam body 11 is an integral piece formed by roll forming of a metal plate. The beam body 11 formed by roll forming is prone to insufficient strength at the rolled corners, and is prone to cracking when subjected to greater stress. By completely filling the cavity 12 with the filling medium 20, the rolled corners of the beam body 11 can be supported by the filling medium 20, thereby significantly improving the structural strength of the rolled corners.

[0089] In addition, the beam body 11 completely filled with the filling medium 20 has good consistency, which can improve the structural strength of the beam body 11.

[0090] In the above technical solution, by completely filling the cavity 12 with the filling medium 20, the structural strength of the beam body 11 can be improved, especially for the beam body 11 of the roll-type vehicle, the structural strength of the roll-formed fillet can be improved, so that the roll-formed fillet is not easy to crack under stress, thereby improving the reliability of the beam body 11.

[0091] In some embodiments of the present application, the filling medium 20 is filled in the middle of the cavity 12 in the length direction of the beam body 11 .

[0092] That is to say, the middle part of the beam body 11 is prone to being a stress concentration area. By filling the filling medium 20 in the middle part of the length direction of the beam body 11, the structural strength of this part can be better improved, making the beam body 11 less likely to deform, and the use of the filling medium 20 can be reduced, which can reduce costs and better reduce the weight of the beam body 11, which is beneficial to the lightweight design of the beam body 11.

[0093] In the above technical solution, by filling the filling medium 20 in the middle part of the length direction of the beam body 11, the structural strength of the part can be improved, so that the beam body 11 is not easy to deform, and the use of the filling medium 20 can be reduced, which can reduce costs and reduce the weight of the beam body 11, which is beneficial to the lightweight design of the beam body 11.

[0094] In some embodiments of the present application, the shape of the filling unit 21 in the first cavity 121 is the same as or different from the shape of the filling unit 21 in the second cavity 122, and the volume of the filling unit 21 in the first cavity 121 is the same as or different from the volume of the filling unit 21 in the second cavity 122.

[0095] In the above technical solution, the shape of the filling unit 21 can be flexibly configured, so that the beam body 11 can be configured with filling units 21 of different particles according to actual conditions, thereby meeting different actual needs.

[0096] In some embodiments of the present application, the filling unit 21 is a sphere and / or the filling unit 21 is a polyhedron. When the filling unit 21 is a polyhedron, each face of the polyhedron has the same shape and / or an equal area.

[0097] Exemplarily, the filling unit 21 is a sphere, and the beam body 11 after filling has good consistency.

[0098] Exemplarily, the filling unit 21 is a polyhedron, and the beam body 11 after filling has good consistency.

[0099] Exemplarily, a portion of the filling units 21 are spheres, and a portion of the filling units 21 are polyhedrons. The filling medium 20 can reasonably fill the cavity 12 and can better support the beam body 11 .

[0100] Exemplarily, the filling unit 21 is a polyhedron, and each face of the polyhedron has the same shape but different areas.

[0101] Exemplarily, the filling unit 21 is a polyhedron, and each face of the polyhedron has a different shape but an equal area.

[0102] Exemplarily, the filling unit 21 is a polyhedron, and each face of the polyhedron has the same shape and the same area.

[0103] In the above technical solution, the shape of the filling unit 21 can be flexibly configured, so that the beam body 11 can be configured with filling units 21 of different particles according to actual conditions, thereby meeting different actual needs.

[0104] In some embodiments of the present application, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the beam body 11 is an integral part formed by roll forming of a metal plate. The integral part obtained by roll forming has a high degree of integrity, reduces the number of welds or connectors, and improves the overall strength and stability of the structure. Roll forming is a continuous production process that can produce a large number of beam body 11 components quickly and efficiently, which helps to reduce costs. Roll forming usually uses metal sheets, and material waste can be reduced by precisely controlling the thickness and shape of the sheet. This helps to reduce raw material costs and reduce waste. Roll forming can achieve high dimensional accuracy and ensure accurate matching of various parts of the beam body 11. During the roll forming process, the metal sheet undergoes plastic deformation, which makes the beam body 11 have high tensile strength and bending strength. Roll forming can adjust the mold and parameters according to specific needs, and flexibly customize beam bodies 11 of different sizes and shapes.

[0105] In the above technical solution, by making the beam body 11 an integral part formed by roll-forming a metal plate, the beam body 11 can have good structural strength, tensile strength and bending strength, and has low processing difficulty, and can also effectively reduce the production cost of the beam body 11.

[0106] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the beam body 11 includes a partition plate 131 connected to two opposite side plates of the beam body 11 , and the partition plate 131 is used to separate at least two cavities 12 in the beam body 11 .

[0107] Exemplarily, the beam body 11 is an integral piece formed by roll forming of a metal plate, the metal plate has a partition plate 131 bent toward the inside of the beam body 11, and the partition plate 131 is connected to two wall plates in the width direction of the beam body 11, thereby separating the beam body 11 into two cavities 12 in the vertical direction. Optionally, the partition plate 131 can also be bent multiple times in the beam body 11, thereby separating three or more cavities 12 in the beam body 11, and this application does not limit this.

[0108] In the above technical solution, by constructing the partition plate 131 in the beam body 11 , the partition plate 131 can improve the structural strength inside the beam body 11 , thereby facilitating improving the structural strength of the beam body 11 .

[0109] In some embodiments of the present application, the filling unit 21 is a hollow granular structure.

[0110] Illustratively, the hollow granular structure can effectively reduce the weight of the filling unit 21, so that after the filling unit 21 is filled in the cavity 12, the increase in the weight of the beam body 11 can be effectively reduced, and the lightweight design of the beam body 11 can be better realized, thereby better realizing the lightweight design of the box body 10 and the battery device 100.

[0111] For example, the hollow granular structure can better absorb and consume dynamic potential energy when the box body 10 vibrates, thereby improving the reliability of the beam body 11.

[0112] For example, the hollow granular structure may rupture when the beam body 11 is subjected to an impact force, thereby being able to better absorb the impact force, thereby better reducing the damage to the beam body 11 and further improving the reliability of the box body 10 .

[0113] In the above technical solution, by making the filling unit 21 a hollow granular structure, it is not only beneficial to the lightweight design of the beam body 11, but also can better improve the performance of the beam body 11, and then improve the reliability of the beam body 11 and the box body 10, thereby effectively protecting the battery cells in the box body 10.

[0114] In some embodiments of the present application, the granular structure is a rigid granular structure.

[0115] Illustratively, the rigid granular structure may be small solid particles having a certain geometric shape and size.

[0116] For example, the rigid hollow granular structure can significantly reduce the overall weight due to its hollow interior. The rigid hollow granular structure can increase the overall rigidity and reduce deformation under the action of external forces.

[0117] In the above technical solution, the structural strength of the beam body 11 can be effectively improved by making the granular structure a rigid granular structure.

[0118] In some embodiments of the present application, a bonding member is further provided in the cavity 12 , and the bonding member is used to bond at least two filling units 21 .

[0119] For example, the bonding member can increase the connection strength between the granular structures and improve the overall stiffness and bending resistance of the beam body 11. This helps to improve the ability of the beam body 11 to resist external forces and reduce deformation when subjected to loads. The bonding member can ensure a reliable connection between the granular structures and reduce structural instability caused by gaps or looseness. This helps to improve the overall stability of the beam body 11, especially when subjected to dynamic loads. The bonding member can absorb vibration energy to a certain extent and reduce the relative movement between the granular structures. This helps to reduce the vibration level inside the structure and reduce mechanical wear.

[0120] Exemplarily, the adhesive can be bonded between some of the filling units 21. For example, if there are multiple filling units 21, every two filling units 21 can be bonded by the adhesive; for example, if there are multiple filling units 21, the adhesive can bond any number of filling units 21, and the present application does not impose any restrictions.

[0121] Exemplarily, the bonding member may also bond all the ground filling units 21 into one body.

[0122] In the above technical solution, by adding bonding pieces, the structural strength of the beam body 11 can be improved and the mechanical wear inside the beam body 11 can be effectively reduced.

[0123] The battery device 100 (Battery Apparatus) mentioned in the embodiment of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include multiple battery cells, and the multiple battery cells are connected in series, parallel or mixed through a busbar component.

[0124] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0125] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0126] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case 10 .

[0127] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0128] As an example, the battery cell assembly may also be accommodated in the case 10 by directly fixing a plurality of battery cells to the case 10 .

[0129] As an example, the box 10 may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box 10 to accommodate the battery cell assembly. The closed space here means covering or closing, which can be sealed or unsealed. The first box can be a top cover or a bottom plate 15.

[0130] As an example, the box body 10 may include a top cover, a frame, and a bottom plate 15. The top cover and the bottom plate 15 are respectively connected to the frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly.

[0131] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle. For example, part of the box 10 can become at least a part of the floor of the vehicle, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0132] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0133] The present application also provides an electrical device.

[0134] In some embodiments of the present application, the electrical device includes a battery device 100, and the battery device 100 is used to store or provide electrical energy.

[0135] In the above technical solution, the electrical device has better reliability.

[0136] Other structures and operations of the battery device and the electrical device according to the embodiments of the present application are known to those skilled in the art and will not be described in detail here.

[0137] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0138] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device (100), characterized in that: include: Battery cells; A box body (10), wherein the battery cell is located in the box body (10), the box body (10) comprises a beam body (11), the beam body (11) is an integral piece formed by roll-forming a metal plate, and the beam body (11) has a cavity (12) therein; A filling medium (20) includes a plurality of granular filling units (21), and the filling medium (20) is filled in the cavity (12).

2. The battery device (100) according to claim 1, characterized in that There are a plurality of cavities (12), and the plurality of cavities (12) are spaced apart and arranged along a first direction. The filling medium (20) is filled in at least one of the cavities (12).

3. The battery device (100) according to claim 1, characterized in that The box body (10) comprises a bottom plate (15) and a plurality of side beams (13) connected to the outer periphery of the bottom plate (15), and at least one of the side beams (13) serves as the beam body (11).

4. The battery device (100) according to claim 3, characterized in that The first direction is the thickness direction of the box body (10); the side beam (13) comprises a first cavity (121) and a second cavity (122) separated along the first direction; the first cavity (121) is located on a side of the second cavity (122) away from the bottom plate (15); the box body (10) further comprises a mounting beam (14) connected to the side beam (13); at least a portion of the mounting beam (14) is arranged opposite to the first cavity (121); and the filling medium (20) is filled in the first cavity (121).

5. The battery device (100) according to claim 4, characterized in that In the first direction, a portion of the mounting beam (14) extends to a position opposite to the second cavity (122), and the filling medium (20) is filled in the second cavity (122).

6. The battery device (100) according to claim 4, characterized in that The volume of the first cavity (121) is smaller than the volume of the second cavity (122).

7. The battery device (100) according to claim 1, characterized in that The cavity (12) is completely filled with the filling medium (20).

8. The battery device (100) according to claim 1, characterized in that In the length direction of the beam body (11), the filling medium (20) is filled in the middle of the cavity (12).

9. The battery device (100) according to claim 4, characterized in that The shape of the filling unit (21) in the first cavity (121) is the same as or different from the shape of the filling unit (21) in the second cavity (122), The volume of the filling unit (21) in the first cavity (121) is the same as or different from the volume of the filling unit (21) in the second cavity (122).

10. The battery device (100) according to claim 1, characterized in that The filling unit (21) is a sphere and / or a polyhedron. When the filling unit (21) is a polyhedron, each face of the polyhedron has the same shape and / or the same area.

11. The battery device (100) according to claim 1, characterized in that The beam body (11) comprises a partition plate (131) connected to two opposite side plates of the beam body (11), and the partition plate (131) is used to separate at least two cavities (12) in the beam body (11).

12. The battery device (100) according to claim 1, characterized in that The filling unit (21) is a hollow granular structure.

13. The battery device (100) according to claim 12, characterized in that The granular structure is a rigid granular structure.

14. The battery device (100) according to claim 1, characterized in that The cavity (12) also has a bonding piece in it, and the bonding piece is used to bond at least two of the filling units (21).

15. An electrical device, characterized in that: The invention comprises a battery device (100) according to any one of claims 1 to 14, wherein the battery device (100) is used for storing or providing electrical energy.

Images