Battery box body, battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery box body, a battery device and a power utilization device, the battery device comprises a battery monomer and a battery box body, the battery box body defines a mounting space, the battery monomer is located in the mounting space, the battery box body comprises a reinforcing part, the reinforcing part comprises a base material part and a reinforcing piece, the base material part is of an integrally formed structure, and the reinforcing piece is arranged on the base material part. The reinforcing part is embedded in the base material part, the base material part is made of a first metal material, the reinforcing part is made of a second metal material, and the strength of the first metal material is lower than that of the second metal material. According to the battery box body in the embodiment of the invention, the overall structural strength of the battery box body can be improved; the reinforcer is isolated from the outside, so that the risk that the material performance of the reinforcer is reduced due to corrosion is reduced, the service life of the reinforcer is prolonged, and the reinforcer can omit preservative treatment.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery housing, a battery device, and an electrical device. Background Technology

[0002] The battery device includes a battery housing and multiple battery cells. The battery housing has an enclosing space where the battery cells are stored, so that the battery housing can provide a certain degree of protection for the battery cells.

[0003] In related technologies, battery boxes are generally made of low-density, low-strength metal materials such as aluminum alloys in order to facilitate the manufacturing and shaping of the battery box and reduce its overall weight.

[0004] In some usage scenarios, the surface of the battery box is exposed, making it prone to collisions with external objects. For example, the bottom surface of the battery box installed in new energy vehicles faces the road surface, making it easy for it to scrape against objects such as bumps, stones, and speed bumps on the road during vehicle operation. Due to the low strength of the battery box material itself, it is easy to cause damage to the battery box after a collision, which may cause damage to the internal battery cells. Utility Model Content

[0005] In view of this, the embodiments of this application aim to provide a battery box, battery device, and power supply device that are beneficial to improving structural strength.

[0006] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0007] This application provides a battery device, which includes a battery cell and a battery housing. The battery housing encloses an installation space, and the battery cell is located within the installation space. The battery housing includes a reinforcing portion, which includes a base material and a reinforcing member. The base material is an integrally formed structure, and the reinforcing member is embedded in the base material. The material of the base material is a first metal material, and the material of the reinforcing member is a second metal material. The strength of the first metal material is lower than the strength of the second metal material.

[0008] The battery device in this embodiment, by embedding a reinforcing member in the base material, has the following advantages: First, it improves the overall structural strength of the battery box, reducing the probability of damage to components such as battery cells caused by deformation or breakage due to collisions with the external environment. This also reduces the probability of thermal runaway of the battery cells 20 due to collisions. Second, the reinforcing member is isolated from the external environment, reducing the risk of material performance degradation due to corrosion, thus extending the service life of the reinforcing member. Furthermore, it eliminates the need for anti-corrosion treatment, simplifies the manufacturing process, improves production efficiency, and reduces production costs.

[0009] In some embodiments, at least a portion of the surface of the substrate forms at least a portion of the outer surface of the battery housing. This facilitates direct contact between the substrate and the colliding object during a collision, allowing the collision energy to be directly transferred to the reinforcing member, thereby reducing the likelihood of the battery housing breaking due to a collision.

[0010] In some embodiments, the distance between the surface of the reinforcing member and the surface of the nearest substrate portion is not less than 1.8 mm. This ensures that the structural strength of the substrate portion itself is sufficient to support the mass of the reinforcing member, reducing the deformation amplitude of the substrate portion due to the weight of the reinforcing member itself; it also reduces the risk of the reinforcing member penetrating the substrate portion after long-term use of the battery device, thereby reducing the probability of the reinforcing member being exposed outside the battery housing.

[0011] In some embodiments, the reinforcing member is a plate-like structure, with the exterior of the battery housing located on one side of the reinforcing member along its thickness direction. This has two advantages: firstly, it increases the protection range of the reinforcing member, reducing the probability of an object penetrating the battery housing during a collision; secondly, it also helps to reduce the overall outer dimensions of the reinforcing part, making the battery housing structure more compact.

[0012] In some embodiments, the reinforcement has a dimension ranging from 0.7 mm to 2 mm along its thickness direction. This helps to reduce the overall external profile of the reinforcement while also making the thickness of the reinforcement reduce the probability of a colliding object penetrating it.

[0013] In some embodiments, the battery housing includes multiple sub-housings that together enclose the mounting space. Each sub-housing includes a first housing, which includes the reinforcing portion. A portion of the surface of the base material forms at least a portion of the inner wall of the mounting space, and a portion of the surface of the base material forms at least a portion of the outer surface of the battery housing. This reduces the dimension of the reinforcing portion along the stacking direction of the base material and the reinforcing member, thereby making the structure of the first housing more compact.

[0014] In some embodiments, the first housing includes a side enclosure and a plate-shaped portion. The side enclosure surrounds the peripheral edge of the plate-shaped portion, and the side enclosure and the plate-shaped portion together form a mounting cavity, which forms at least a portion of the mounting space. The reinforcing portion forms at least a portion of the plate-shaped portion. This enhances the structural strength of the plate-shaped portion, reduces the probability of it deforming locally and intruding into the mounting cavity after being impacted by external forces, and reduces the likelihood of a colliding object penetrating the plate-shaped portion.

[0015] In some embodiments, the mounting cavity is open on the side opposite to the plate-shaped portion along a first direction, and the surface of the plate-shaped portion facing the open position of the mounting cavity along the first direction is a first wall. In a projection plane perpendicular to the first direction, the projection of the first wall is within the projection range of the reinforcing member. This expands the protection range of the reinforcing member, reducing the probability that, during an impact along the first direction, a colliding object will directly pass through the plate-shaped portion and impact other components in the battery device within the mounting cavity.

[0016] In some embodiments, the reinforcing portion forms at least a portion of the side enclosure, and the reinforcing member extends from the plate-shaped portion to the side enclosure such that a portion of the reinforcing member forms part of the connection position between the plate-shaped portion and the side enclosure. The reinforcing member strengthens the structural strength of the connection position between the plate-shaped portion and the side enclosure, reducing the probability that the plate-shaped portion, after being impacted, will deform entirely due to deformation of the side enclosure and intrude into the space of the mounting cavity, thus improving the overall structural strength of the first housing.

[0017] In some embodiments, the mounting cavity is open on the side opposite to the plate-shaped portion along a first direction. The surface of the plate-shaped portion facing the open position of the mounting cavity along the first direction is a first wall. The side enclosure extends along the first direction, and a portion of the reinforcing member extends along the first direction and extends into the side enclosure. The portion of the reinforcing member located in the side enclosure, away from the plate-shaped portion, has a dimension ranging from 5 mm to 10 mm from the first wall along the first direction. This increases the connection strength between the side enclosure and the plate-shaped portion, reduces the probability of the plate-shaped portion deforming as a whole under the force of the first direction and intruding into the space of the mounting cavity, and also reduces the adverse effects of the reinforcing member needing to collapse and absorb energy when the side enclosure is impacted from other directions.

[0018] In some embodiments, the substrate is a cast, one-piece structure, and the melting point of the first metal material is lower than that of the second metal material. Casting is a mature manufacturing process that facilitates large-scale production.

[0019] In some embodiments, the first metal material is an aluminum alloy, which has low density, low melting point, and is easy to form; and / or, the second metal material is steel, which has high strength and high melting point.

[0020] This application embodiment also provides a battery housing, the battery housing including a reinforcing part, the reinforcing part including a base material and a reinforcing member, the base material being an integrally formed structure, the reinforcing member being embedded in the base material, the material of the base material being a first metal material, the material of the reinforcing member being a second metal material, and the strength of the first metal material being lower than the strength of the second metal material.

[0021] In this way, on the one hand, it helps to improve the overall structural strength of the battery box, reducing the probability that the battery box or external objects may penetrate into the battery box and damage other components due to deformation or breakage caused by collisions with the outside world. On the other hand, the reinforcement is isolated from the outside world, reducing the risk of material performance degradation due to corrosion, which helps to extend the service life of the reinforcement. At the same time, it allows the reinforcement to be exempt from anti-corrosion treatment, simplifies the manufacturing process of the reinforcement, improves production efficiency, and reduces production costs.

[0022] In some embodiments, the battery housing includes multiple sub-housings that together enclose an installation space. Each sub-housing includes a first housing, which includes the reinforcing portion. A portion of the surface of the base material forms at least a portion of the inner wall of the installation space, and a portion of the surface of the base material forms at least a portion of the outer surface of the battery housing. This reduces the size of the reinforcing portion along the stacking direction of the base material and the reinforcing member, thereby making the structure of the first housing more compact.

[0023] In some embodiments, the first housing includes a side enclosure and a plate-shaped portion. The side enclosure surrounds the peripheral edge of the plate-shaped portion, and the side enclosure and the plate-shaped portion together form a mounting cavity, which forms at least a portion of the mounting space. The reinforcing portion forms at least a portion of the plate-shaped portion. This enhances the structural strength of the plate-shaped portion, reduces the probability of it deforming locally and intruding into the mounting cavity after being impacted by external forces, and reduces the likelihood of a colliding object penetrating the plate-shaped portion.

[0024] In some embodiments, the reinforcing portion forms at least a portion of the side enclosure, and the reinforcing member extends from the plate-shaped portion to the side enclosure such that a portion of the reinforcing member forms part of the connection position between the plate-shaped portion and the side enclosure. The reinforcing member strengthens the structural strength of the connection position between the plate-shaped portion and the side enclosure, reducing the probability that the plate-shaped portion, after being impacted, will deform entirely due to deformation of the side enclosure and intrude into the space of the mounting cavity, thus improving the overall structural strength of the first housing.

[0025] This application also provides an electrical device, which includes the battery device described in any of the foregoing embodiments, and the battery device is used as a power source for the electrical device.

[0026] In this way, the chances of the battery being damaged by the collision are reduced when the electrical device collides with an object.

[0027] In some embodiments, the electrical device is a vehicle, the vehicle includes a body structure, the battery device is disposed at the bottom of the body structure, and at least a portion of the surface of the reinforcing portion forms the bottom surface of the battery device.

[0028] This helps reduce the probability of damage to the battery pack and subsequent battery failure due to foreign objects on the ground or the vehicle bottoming out during driving. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a vehicle according to one embodiment of this application;

[0030] Figure 2 This is an exploded schematic diagram of a battery device in one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the subshell in the first embodiment of this application;

[0032] Figure 4 for Figure 3 A schematic diagram of an embodiment from another perspective;

[0033] Figure 5 for Figure 4 A cross-sectional view of the Chinese embodiment at position AA;

[0034] Figure 6 for Figure 5 A partially enlarged schematic diagram of position B in the Chinese embodiment;

[0035] Figure 7 This is a partially enlarged cross-sectional view of the subshell in the second embodiment of this application, and its enlarged position is... Figure 5 The position of B in the text is the same;

[0036] Figure 8 This is a schematic diagram of the vehicle body structure and battery device in one embodiment of this application.

[0037] Explanation of reference numerals in the attached figures

[0038] 1000, Vehicle; 100, Battery assembly; 200, Controller; 300, Motor; 400, Vehicle body structure; 10, Battery housing; 10a, Reinforcing part; 10b, Base material part; 10c, Reinforcing member; 10d, Mounting space; 10e, First sub-part; 10f, Second sub-part; 11, Sub-shell; 12, First shell; 12a, Mounting cavity; 121, Side panel; 121a, Cavity; 122, Plate-shaped part; 122a, First wall; 13, First housing; 14, Second housing; 20, Battery cell. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0044] In the description of the embodiments in this application, for ease of explanation, as follows: Figure 2 As shown, the direction of arrow X is the straight line direction of the "vertical direction" and the "first direction". The direction of x1 represents the "top" and the direction of x2 represents the "bottom" and the direction of gravity.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0047] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0048] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0049] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0050] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0051] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0052] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0053] In some embodiments, see Figure 2 The battery device can be a battery pack, which includes a battery housing 10 and one or more battery cell assemblies, with the battery cell assemblies housed in the battery housing 10.

[0054] As an example, the battery cell assembly can be a battery module, which can be housed in the battery housing 10 by fixing the battery module in the battery housing 10.

[0055] As an example, the battery cell assembly can also be housed in the battery housing 10 by directly fixing multiple battery cells 20 to the battery housing 10.

[0056] As an example, see Figure 2 The battery housing 10 may include a first housing 13 and a second housing 14. The first housing 13 and the second housing 14 are fastened together to form a closed space inside the battery housing 10 to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 13 may be a top cover or a bottom plate.

[0057] As an example, the battery housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the battery housing 10 forms an enclosed space to accommodate individual battery cells.

[0058] In some embodiments, the battery housing 10 may be part of the vehicle's chassis structure. For example, a portion of the battery housing 10 may be at least a portion of the vehicle's floor, or a portion of the battery housing 10 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0059] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0060] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows, with reference to the accompanying drawings.

[0061] Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in one embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Figure 1 As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

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

[0063] The embodiments of this application will now be described in detail.

[0064] In related technologies, a protective plate is installed on the outer surface of the battery casing of the battery device. The protective plate is designed to ensure that, in the event of a collision between the battery device and an external object, the battery casing collides with the object before the battery device itself. This reduces the risk of thermal runaway caused by the external object penetrating the battery casing and colliding with the individual battery cells inside the casing during a collision.

[0065] However, in related technologies, the protective plate and the battery housing are two independent components. They need to be connected and fixed using screws or other methods, increasing the overall assembly steps of the battery device and hindering production efficiency. Furthermore, the protective plate is directly exposed, requiring anti-corrosion treatment, which adds an extra manufacturing step and increases manufacturing costs.

[0066] Based on the aforementioned technical problems, this application aims to provide a battery device in which the battery casing includes a base material and a reinforcing member. The reinforcing member is embedded in the base material, and the strength of the reinforcing member material is higher than that of the base material. Thus, by enclosing the reinforcing member with the base material, the reinforcing member is placed in a sealed environment, thereby eliminating the need for anti-corrosion treatment during the manufacturing process; simultaneously, the reinforcing member helps to improve the overall structural strength of the battery casing.

[0067] Specifically, see Figures 2 to 6 This application provides a battery device 100.

[0068] The battery housing 10 includes a reinforcing part 10a, which includes a base material part 10b and a reinforcing member 10c. The base material part 10b is an integrally formed structure, and the reinforcing member 10c is embedded in the base material part 10b. The material of the base material part 10b is a first metal material, and the material of the reinforcing member 10c is a second metal material. The strength of the first metal material is lower than that of the second metal material.

[0069] The substrate 10b is a one-piece molded structure, meaning that the substrate 10b itself is a single component manufactured using processes such as casting, injection molding, and additive manufacturing.

[0070] The reinforcement 10c is embedded in the base material portion 10b, which means that the reinforcement 10c is completely wrapped inside the base material portion 10b, so that the reinforcement 10c cannot be observed from the outside of the reinforcement portion 10a from a macroscopic perspective.

[0071] The substrate 10b is a one-piece molded structure, which eliminates the need to splice multiple structural parts to form the substrate 10b. As a result, no seam is formed in the substrate 10b that connects the outside of the reinforcing part 10a with the space inside the substrate 10b that encloses the reinforcing member 10c. External air and water are difficult to enter the space inside the substrate 10b that encloses the reinforcing member 10c and come into contact with the reinforcing member 10c.

[0072] It is understandable that the base material 10b fits into the reinforcing member 10c from all directions, thereby serving to limit and fix the reinforcing member 10c.

[0073] Both the base material 10b and the reinforcing member 10c are made of metal. This allows the plastic deformation of metal under external force to be utilized, so that when the reinforcing member 10a is directly impacted or when an external object impacts other areas of the battery housing 10, transmitting the impact force to the reinforcing member 10a, the plastic deformation of the base material 10b and the reinforcing member 10c can absorb some of the impact energy, reducing the adverse effects of the impact on other components inside the battery housing 10.

[0074] Strength refers to a material's ability to resist damage under external force. The material used in the reinforcing member 10c has a higher strength than the material used in the base material 10b, which helps to improve the overall resistance to damage of the reinforcing member 10a, given that the dimensions of the reinforcing member 10a are fixed.

[0075] In this embodiment of the battery device 100, by embedding a reinforcing member 10c in the base material portion 10b, on the one hand, it is beneficial to improve the overall structural strength of the battery box 10, reducing the probability of damage to components such as the battery cell 20 due to deformation, breakage, or other reasons caused by collisions with the external environment. This also reduces the probability of thermal runaway of the battery cell 20 due to collisions. On the other hand, the reinforcing member 10c is isolated from the external environment, reducing the risk of material performance degradation due to corrosion, which helps to extend the service life of the reinforcing member 10c. At the same time, it allows the reinforcing member 10c to be exempt from anti-corrosion treatment, simplifying the manufacturing process, improving production efficiency, and reducing production costs.

[0076] It is understandable that the reinforcing part 10a may be formed in part of the battery housing 10, or the reinforcing part 10a may be formed in the entire battery housing 10.

[0077] Some embodiments, see below Figure 3 , Figure 5 and Figure 6 At least a portion of the surface of the substrate portion 10b forms at least a portion of the outer surface of the battery housing 10.

[0078] The outer surface of the battery housing 10 refers to the surface of the battery housing 10 that is directly exposed to the outside world. During the process of the battery device 100 colliding with an external object, the outer surface of the battery housing 10 comes into direct contact with the external object.

[0079] This allows the base material 10b to directly contact the colliding object during the collision process, thereby facilitating the direct transfer of collision energy to the reinforcing member 10c and reducing the probability of the battery box 10 being damaged due to the collision.

[0080] It is understandable that the base material 10b directly supports the reinforcing member 10c.

[0081] Understandably, during the use of the battery device 100, forces generated by vibration, pushing, torsion, and stretching are applied to the battery housing 10. Since the strength of the material used for the reinforcing member 10c is different from that of the material used for the base material 10b, the deformation range of the reinforcing member 10c is different from that of the base material 10b under the same magnitude of force. This causes the reinforcing member 10c to exert a force on the base material 10b, thus posing a risk that the reinforcing member 10c may penetrate the base material 10b.

[0082] In some embodiments, the distance between the surface of the reinforcing member 10c and the surface of the nearest substrate portion 10b is not less than 1.8 mm.

[0083] This ensures that the structural strength of the base material 10b itself is sufficient to support the mass of the reinforcing member 10c, reducing the deformation range of the base material 10b due to the weight of the reinforcing member 10c itself; it also reduces the risk that the reinforcing member 10c will penetrate the base material 10b after long-term use of the battery device 100, thereby reducing the probability that the reinforcing member 10c will be exposed outside the battery housing 10.

[0084] The specific value of the distance between the surface of the reinforcing member 10c and the surface of the nearest base part 10b can be 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3.0mm, etc.

[0085] The distance between the surface of the reinforcing member 10c and the surface of the nearest base material 10b varies depending on the specific shape and arrangement of the reinforcing member 10c and the base material 10b. For example, see... Figure 6 The minimum distance between the surface of the reinforcing member 10c and the surface of the base material 10b is D3, i.e., D3 ≥ 1.8m; for example, see [reference needed]. Figure 7 The minimum distance between the surface of the reinforcing member 10c and the surface of the base material 10b is D4, that is, D4≥1.8m.

[0086] The specific method for measuring the distance between the surface of the reinforcing member 10c and the surface of the nearest substrate portion 10b is not limited. For example, in an environment with a room temperature of 25°C, a portion of the reinforcing member 10a of the battery box 10 is cut out to obtain a cross-section including the substrate portion 10b and the reinforcing member 10c. On the cross-section, the two points closest to the boundary of the cross-section of the reinforcing member 10c from the boundary of the cross-section of the substrate portion 10b are found. The reference position of the main scale of the vernier caliper is placed against one of the points, and the vernier is moved so that the reference position of the vernier is against the other point. The value of the vernier caliper is read, thereby obtaining the distance between the surface of the reinforcing member 10c and the surface of the nearest substrate portion 10b.

[0087] In some embodiments, see Figure 6 The reinforcing member 10c has a plate-like structure, and the outside of the battery box 10 is located on one side of the reinforcing member 10c along its thickness direction.

[0088] The thickness direction of the reinforcing member 10c refers to the straight line direction in which the smallest dimension of the reinforcing member 10c is located in its three-dimensional dimensions.

[0089] In this way, on the one hand, it is beneficial to increase the protection range of the reinforcing member 10c and reduce the probability of the colliding object penetrating the battery box 10 during the collision process; on the other hand, it is also beneficial to reduce the overall external outline size of the reinforcing part 10a, making the structure of the battery box 10 more compact.

[0090] In some embodiments, see Figure 6 and Figure 7 The dimensions of the reinforcing member 10c along its thickness direction range from 0.7 mm to 2 mm. That is, 0.7 mm ≤ D1 ≤ 2 mm.

[0091] This helps to reduce the overall external contour dimensions of the reinforcing member 10c, while also making the thickness of the reinforcing member 10c reduce the probability of a colliding object penetrating the reinforcing member 10c.

[0092] The dimensions of the reinforcing member 10c along its thickness direction can be 0.7mm, 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm, 2.0mm, etc.

[0093] The specific method for measuring the dimension of the reinforcing member 10c along its thickness direction is not limited. For example, in an environment with a room temperature of 25°C, a portion of the reinforcing part 10a of the battery box 10 is cut out to obtain a complete cross-section of the reinforcing member 10c. The reference position of the main scale of the vernier caliper is placed against one side boundary of the reinforcing member 10c along its thickness direction. The vernier is moved so that the reference position of the vernier is against one side boundary of the reinforcing member 10c along its thickness direction, and the value of the vernier caliper is read, thereby obtaining the dimension of the reinforcing member 10c along its thickness direction.

[0094] In some embodiments, see Figure 2 The battery housing 10 includes multiple sub-housing units 11, which together enclose an installation space 10d.

[0095] The installation space 10d is used to arrange other components in the battery device 100, and the battery box 10 protects the other components in the battery device 100.

[0096] Multiple sub-shells 11 are assembled to form a battery housing 10 so that other components in the battery device 100 can be transferred in during the assembly process.

[0097] In some embodiments that include a sub-housing 11 and a mounting space 10d, see [reference] Figures 3 to 6 The sub-shell 11 includes a first shell 12, the first shell 12 includes a reinforcing portion 10a, a portion of the surface of the base material portion 10b forms at least a portion of the inner wall of the mounting space 10d, and a portion of the surface of the base material portion 10b forms at least a portion of the outer surface of the battery box 10.

[0098] The first housing 12 is a sub-housing 11 in which a reinforcing part 10a is provided. It can be that a part of the multiple sub-housing 11 is the first housing 12, or all of the multiple sub-housing 11 are the first housing 12.

[0099] This helps to reduce the size of the reinforcing part 10a along the stacking direction of the base material part 10b and the reinforcing member 10c, thereby making the structure of the first housing 12 more compact.

[0100] In some embodiments where the reinforcing member 10c is a plate-like structure, see [reference]. Figure 6 The stacking direction of the substrate 10b and the reinforcing member 10c is the thickness direction of the reinforcing member 10c.

[0101] In some embodiments, see Figure 3 , Figure 5 and Figure 6 The first housing 12 includes a side enclosure 121 and a plate-shaped portion 122. The side enclosure 121 surrounds the peripheral edge of the plate-shaped portion 122. The side enclosure 121 and the plate-shaped portion 122 together form a mounting cavity 12a, which forms at least a portion of the mounting space 10d.

[0102] The side enclosure 121 is used for connection with other sub-housings 11. The mounting cavity 12a is used to accommodate other components in the battery device 100. The plate-shaped portion 122 is used to support other components in the battery device 100.

[0103] It is understandable that, since the side enclosure 121 needs to be attached to other sub-shells 11, the structural strength of the attachment position is lower than that of the plate-shaped portion 122, which has better overall structural integrity. Therefore, during the arrangement of the battery device 100, the plate-shaped portion 122 is used to face the direction in which the battery device 100 is easily impacted.

[0104] In some embodiments, see Figure 3 The reinforcing part 10a forms at least a portion of the plate-shaped part 122.

[0105] This helps to enhance the structural strength of the plate section 122, reduce the probability that the plate section 122 will undergo local deformation and intrude into the space inside the mounting cavity 12a after being impacted by the outside, and reduce the chance of the colliding object penetrating the plate section 122.

[0106] In some embodiments, participants Figure 3 and Figure 5 The mounting cavity 12a is open on the side away from the plate-shaped portion 122 in the first direction, so that other components in the battery device 100 can be installed into the mounting cavity 12a through the open position of the mounting cavity 12a.

[0107] In some embodiments, see Figure 4 and Figure 6 The surface of the plate-shaped portion 122 facing the open position of the mounting cavity 12a along the first direction is the first wall 122a. In the projection plane perpendicular to the first direction, the projection of the first wall 122a is located within the projection range of the reinforcing member 10c.

[0108] In this way, the protection range of the reinforcing member 10c is expanded, and the probability that the colliding object will directly pass through the plate-shaped part 122 and collide with other components in the battery device 100 in the mounting cavity 12a during the impact along the first direction is reduced.

[0109] The number of independent reinforcing parts 10a provided on the first housing 12 is not limited; there may be one or more.

[0110] In some embodiments, see Figure 7 The reinforcing part 10a forms at least a portion of the side enclosure 121. This improves the overall structural strength of the side enclosure 121, reduces the probability that the side enclosure 121 will deform locally after being impacted and intrude into the space inside the mounting cavity 12a, and reduces the chance of the impacting object penetrating the side enclosure 121.

[0111] In some embodiments, see Figure 7 The reinforcing member 10c extends from the plate-shaped portion 122 to the side portion 121, such that a portion of the reinforcing member 10c forms part of the connection position between the plate-shaped portion 122 and the side portion 121.

[0112] In other words, a portion of the reinforcing part 10a forms at least a portion of the plate-shaped part 122, and another portion forms at least a portion of the side circumference part 121.

[0113] The reinforcement 10c strengthens the structural strength of the connection between the plate-shaped part 122 and the side wall part 121, reducing the probability that the plate-shaped part 122 will deform as a whole and intrude into the space of the mounting cavity 12a after being impacted due to the deformation of the side wall part 121, thereby improving the overall structural strength of the first housing 12.

[0114] In some embodiments where a first wall 122a is provided, see [reference]. Figure 7 The side enclosure 121 extends along a first direction, and a portion of the reinforcing member 10c extends along the first direction and extends into the side enclosure 121. The portion of the reinforcing member 10c located in the side enclosure 121 away from the plate-shaped portion 122 has a dimension range of 5mm to 10mm along the first wall 122a in the first direction. That is, 5mm≤D2≤10mm.

[0115] This helps to increase the connection strength between the side section 121 and the plate section 122, reduces the probability that the plate section 122 will deform as a whole under the force of the first direction and intrude into the space of the mounting cavity 12a. At the same time, it also reduces the adverse effect of the reinforcing member 10c on the side section 121 being impacted from other directions and needing to collapse to absorb energy.

[0116] The dimensions of the portion of the reinforcing member 10c located in the side enclosure 121 away from the plate-shaped portion 122 along the first direction with the first wall 122a are specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0117] In some embodiments, see Figure 7 The reinforcing member 10c includes a first sub-part 10e and a second sub-part 10f. The second sub-part 10f is disposed on the peripheral edge of the first sub-part 10e. The first sub-part 10e is a plate-shaped structure and is located in the plate-shaped part 122. The second sub-part 10f extends along a first direction and a portion of it is located in the side enclosure part 121.

[0118] In some embodiments, the side portion 121 and the second sub-portion 10f are both annular structures.

[0119] In some embodiments, see Figure 6 and Figure 7 The side enclosure 121 is provided with a cavity 121a, so that when the side enclosure 121 is impacted, part of the structure of the side enclosure 121 can deform and penetrate into the cavity 121a. By deforming the structure, part of the impact energy is absorbed, reducing the probability that the side enclosure 121 will penetrate into the mounting cavity 12a and crush other components in the battery device 100.

[0120] The specific method by which the substrate portion 10b is formed into an integral molded structure is not limited.

[0121] For example, the substrate portion 10b is a cast integral structure, and the melting point of the first metal material is lower than that of the second metal material.

[0122] The casting method is a mature manufacturing process that facilitates large-scale production.

[0123] The reinforcing member 10c is placed in the cavity of the mold beforehand, and then liquid first metal material is injected into the cavity, while the reinforcing member 10c does not melt. After the first metal material cools, the base material 10b is obtained.

[0124] In some embodiments, the substrate portion 10b is die-cast to improve the tensile strength and impact resistance of the substrate portion 10b.

[0125] In some embodiments, the first metallic material is an aluminum alloy, which has low density, low melting point, and is easy to form.

[0126] In some embodiments, the second metallic material is steel, which has high strength, a high melting point, and is not easily deformed at high temperatures.

[0127] The apparatus 100 in a specific embodiment of this application is as follows:

[0128] The battery device 100 includes a battery cell 20 and a battery housing 10. The battery housing 10 encloses an installation space 10d, and the battery cell 20 is located within the installation space 10d. The battery housing 10 includes multiple sub-housings 11, which together enclose the installation space 10d. Each sub-housing 11 includes a first housing 12, which has a reinforcing portion 10a. The reinforcing portion 10a includes a base material portion 10b and a reinforcing member 10c. The base material portion 10b is a die-cast integral structure, and the reinforcing member 10c is embedded in the base material portion 10b. The base material portion 10b is made of aluminum alloy, and the reinforcing member 10c is made of steel. A portion of the surface of the base material portion 10b forms at least a portion of the inner wall of the installation space 10d, and a portion of the surface of the base material portion 10b forms at least a portion of the outer surface of the battery housing 10. The minimum distance between the surface of the reinforcing member 10c and the surface of the base material portion 10b is not less than 1.8 mm. The reinforcing member 10c has a plate-like structure, and the exterior of the battery box 10 is located on one side of the reinforcing member 10c along its thickness direction. The dimensions of the reinforcing member 10c along its thickness direction range from 0.7 mm to 2 mm. The first housing 12 includes a side enclosure portion 121 and a plate-shaped portion 122. The side enclosure portion 121 surrounds the peripheral edge of the plate-shaped portion 122. The side enclosure portion 121 and the plate-shaped portion 122 together form a mounting cavity 12a. The mounting cavity 12a forms at least a portion of the mounting space 10d, and the reinforcing portion 10a forms at least a portion of the plate-shaped portion 122. The mounting cavity 12a is open on the side away from the plate-shaped portion 122 along a first direction. The surface of the plate-shaped portion 122 facing the open position of the mounting cavity 12a along the first direction is a first wall 122a. In a projection plane perpendicular to the first direction, the projection of the first wall 122a is located within the projection range of the reinforcing member 10c. The reinforcing portion 10a forms at least a portion of the side wall portion 121, and the reinforcing member 10c extends from the plate-shaped portion 122 to the side wall portion 121 such that a portion of the reinforcing member 10c forms part of the connection position between the plate-shaped portion 122 and the side wall portion 121. The side wall portion 121 extends along a first direction, and a portion of the reinforcing member 10c extends along the first direction and extends into the side wall portion 121. The end of the reinforcing member 10c located in the side wall portion 121 away from the plate-shaped portion 122 has a dimension ranging from 5 mm to 10 mm along the first wall 122a in the first direction.

[0129] This application embodiment also provides a battery housing 10, see reference. Figures 3 to 6The battery housing 10 includes a reinforcing part 10a, which includes a base material part 10b and a reinforcing member 10c. The base material part 10b is an integrally formed structure, and the reinforcing member 10c is embedded in the base material part 10b. The material of the base material part 10b is a first metal material, and the material of the reinforcing member 10c is a second metal material. The strength of the first metal material is lower than that of the second metal material.

[0130] In this way, on the one hand, it helps to improve the overall structural strength of the battery box 10, reducing the probability that part of the battery box 10 or external objects may enter the battery box 10 and cause damage to other components due to deformation or breakage caused by collisions with the outside world; on the other hand, the reinforcement 10c is isolated from the outside world, reducing the risk of material performance degradation due to corrosion, which helps to extend the service life of the reinforcement 10c. At the same time, it allows the reinforcement 10c to be exempt from anti-corrosion treatment, simplifies the manufacturing process of the reinforcement 10c, improves production efficiency, and reduces production costs.

[0131] This application embodiment also provides an electrical device, which includes any of the battery devices 100 in the foregoing embodiments, and the battery devices 100 are used as the power source for the electrical device.

[0132] In this way, the probability of the battery device 100 being damaged due to the collision is reduced during the process of the electrical device colliding with an object.

[0133] In some embodiments, the electrical device is vehicle 1000, see reference. Figure 8 The vehicle 1000 includes a body structure 400, a battery device 100 is disposed at the bottom of the body structure 400, and at least a portion of the surface of the reinforcing part 10a forms the bottom surface of the battery device 100.

[0134] The body structure 400, which is the white body of vehicle 1000, is used to house other components in vehicle 1000.

[0135] This helps reduce the probability of damage to the battery pack 10 and the battery device 100 caused by damage to the battery pack 10 in situations such as foreign objects on the ground or the vehicle bottoming out during driving.

[0136] In some embodiments where a first housing 12 is provided, the first housing 12 is located at the bottom of the battery device 100.

[0137] In some embodiments, the first direction is the vertical direction. The vertical direction is the straight line in which the direction of gravity lies.

[0138] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0139] The above are merely preferred embodiments of this application and are not intended to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery device, characterized in that, The battery device includes a battery cell and a battery housing. The battery housing encloses an installation space, and the battery cell is located within the installation space. The battery housing includes a reinforcing portion, which includes a base material and a reinforcing member. The base material is an integrally formed structure, and the reinforcing member is embedded in the base material. The material of the base material is a first metal material, and the material of the reinforcing member is a second metal material. The strength of the first metal material is lower than the strength of the second metal material.

2. The battery device according to claim 1, characterized in that, At least a portion of the surface of the substrate forms at least a portion of the outer surface of the battery housing.

3. The battery device according to claim 1, characterized in that, The distance between the surface of the reinforcing member and the surface of the nearest substrate portion is not less than 1.8 mm.

4. The battery device according to claim 1, characterized in that, The reinforcing member is a plate-shaped structure, and the outside of the battery box is located on one side of the reinforcing member along its thickness direction.

5. The battery device according to claim 2, characterized in that, The dimensions of the reinforcing member along its thickness direction range from 0.7 mm to 2 mm.

6. The battery device according to claim 1, characterized in that, The battery housing includes multiple sub-housing shells, which together enclose the mounting space. Each sub-housing shell includes a first housing, which includes the reinforcing portion. A portion of the surface of the base material portion forms at least a portion of the inner wall of the mounting space, and a portion of the surface of the base material portion forms at least a portion of the outer surface of the battery housing.

7. The battery device according to claim 6, characterized in that, The first housing includes a side enclosure and a plate-shaped portion. The side enclosure surrounds the peripheral edge of the plate-shaped portion, and the side enclosure and the plate-shaped portion together form a mounting cavity. The mounting cavity forms at least a portion of the mounting space, and the reinforcing portion forms at least a portion of the plate-shaped portion.

8. The battery device according to claim 7, characterized in that, The mounting cavity is open on the side away from the plate-shaped portion along the first direction. The surface of the plate-shaped portion facing the open position of the mounting cavity along the first direction is a first wall. In a projection plane perpendicular to the first direction, the projection of the first wall is located within the projection range of the reinforcing member.

9. The battery device according to claim 7, characterized in that, The reinforcing portion forms at least a portion of the side enclosure portion, and the reinforcing member extends from the plate-shaped portion to the side enclosure portion such that a portion of the reinforcing member forms part of the connection position between the plate-shaped portion and the side enclosure portion.

10. The battery device according to claim 9, characterized in that, The mounting cavity is open on the side away from the plate-shaped portion along the first direction. The surface of the plate-shaped portion facing the open position of the mounting cavity along the first direction is the first wall. The side enclosure extends along the first direction. A portion of the reinforcing member extends along the first direction and extends into the side enclosure. The end of the reinforcing member located in the side enclosure that is away from the plate-shaped portion has a dimension range of 5 mm to 10 mm from the first wall along the first direction.

11. The battery device according to claim 1, characterized in that, The base material is a cast, one-piece structure, and the melting point of the first metal material is lower than that of the second metal material.

12. The battery device according to any one of claims 1 to 11, characterized in that, The first metal material is an aluminum alloy; and / or the second metal material is steel.

13. A battery housing, characterized in that, The battery housing includes a reinforcing section, which includes a base material and a reinforcing member. The base material is an integrally formed structure, and the reinforcing member is embedded in the base material. The material of the base material is a first metal material, and the material of the reinforcing member is a second metal material. The strength of the first metal material is lower than that of the second metal material.

14. The battery housing according to claim 13, characterized in that, The battery housing includes multiple sub-housing shells, which together enclose an installation space. Each sub-housing shell includes a first housing, which includes the reinforcing portion. A portion of the surface of the base material portion forms at least a portion of the inner wall of the installation space, and a portion of the surface of the base material portion forms at least a portion of the outer surface of the battery housing.

15. The battery housing according to claim 14, characterized in that, The first housing includes a side enclosure and a plate-shaped portion. The side enclosure surrounds the peripheral edge of the plate-shaped portion, and the side enclosure and the plate-shaped portion together form a mounting cavity. The mounting cavity forms at least a portion of the mounting space, and the reinforcing portion forms at least a portion of the plate-shaped portion.

16. The battery housing according to claim 15, characterized in that, The reinforcing portion forms at least a portion of the side enclosure portion, and the reinforcing member extends from the plate-shaped portion to the side enclosure portion such that a portion of the reinforcing member forms part of the connection position between the plate-shaped portion and the side enclosure portion.

17. An electrical device, characterized in that, The electrical device includes the battery device according to any one of claims 1-12, the battery device being used as a power source for the electrical device.

18. The electrical appliance according to claim 17, characterized in that, The electrical device is a vehicle, the vehicle includes a body structure, the battery device is located at the bottom of the body structure, and at least a portion of the surface of the reinforcing part forms the bottom surface of the battery device.

Images