Battery pack protection plate, battery pack assembly and electric equipment

Abstract

The embodiment of the utility model provides a battery pack protection plate, a battery pack assembly and electric equipment. The battery pack protection plate comprises a protection plate body and a sealing piece, the guard plate body is a titanium alloy guard plate; the sealing piece is connected to one side, close to the battery pack, of the protection plate body so as to seal the part between the protection plate body and the battery pack. The structural strength and the corrosion resistance of the protection plate body are improved by adopting the titanium alloy protection plate, so that the protection plate body has the excellent performance of resisting strong acid and strong alkali, and the risk that the protection plate body is corroded by external gas and liquid is reduced. The connection position of the protection plate body and the battery pack is sealed through the sealing ring piece, so that the sealing ring can realize effective water prevention on the battery pack protection plate, and external gas or liquid is prevented from easily permeating into the battery pack from the connection position of the protection plate body and the battery pack; the risk that liquid is easily retained on one side, close to the battery pack, of the battery pack protection plate is reduced, and the sealing performance and the corrosion resistance of the battery pack protection plate are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of power batteries, and specifically relates to a battery pack protective plate, a battery pack assembly and electrical equipment. Background Art

[0002] The battery pack guard plate is installed at the bottom of the battery pack and is used to protect the battery pack, which plays a relatively important role.

[0003] In the prior art, the battery pack protective plate usually includes a steel plate, a first anti-corrosion plate, a second anti-corrosion plate and an anti-corrosion frame. The steel plate is embedded in the anti-corrosion frame, and the first anti-corrosion plate and the second anti-corrosion plate are respectively connected to both sides of the steel plate, so that the steel plate has good corrosion resistance. However, due to the structural limitations of the battery pack, liquid is easily retained on the battery pack protective plate, resulting in poor corrosion resistance of the battery pack protective plate, which in turn affects the sealing performance of the battery pack. Utility Model Content

[0004] In view of the above problems, the present utility model is proposed to provide a battery pack protective plate, a battery pack assembly and an electrical device that overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery pack protective plate, the battery pack protective plate comprising: a protective plate body and a sealing member;

[0007] The guard plate body is a titanium alloy guard plate;

[0008] The sealing member is connected to a side of the guard plate body close to the battery pack to seal between the guard plate body and the battery pack.

[0009] Optionally, the guard plate body includes a mounting portion and a reinforcement portion, and the mounting portion is arranged on a peripheral side of the reinforcement portion;

[0010] The mounting portion includes a flange, and the flange is used for assembly with external equipment.

[0011] Optionally, the mounting portion includes a connecting portion, the connecting portion is arranged on a side of the mounting portion close to the reinforcing portion, and the connecting portion is configured to be connected and fixed to the sealing component.

[0012] Optionally, the sealing member is a sealing ring, the connecting portion is provided with a mounting step, and the sealing ring is clamped on the mounting step.

[0013] Optionally, the guard plate body includes a reinforcement portion, the reinforcement portion is provided with a protrusion, and the protrusion protrudes toward the bottom of the battery pack to improve the structural strength of the guard plate body.

[0014] Optionally, the protrusion extends along a first direction;

[0015] There are multiple protrusions, and the multiple protrusions are arranged at intervals along the second direction;

[0016] Wherein, the first direction and the second direction are arranged at an angle.

[0017] Optionally, the cross-sectional shape of the protrusion along the second direction is rectangular, cross-shaped or trapezoidal.

[0018] Optionally, the reinforcing portion and the connecting portion are an integrally formed structure.

[0019] Optionally, the strength of the guard plate body is greater than or equal to 500 MPa.

[0020] Optionally, the density of the guard plate body is less than or equal to 4.5 g / cm 3.

[0021] Optionally, the fracture elongation rate of the guard plate body is any value between 10% and 20%.

[0022] In a second aspect, an embodiment of the present application provides a battery pack assembly, the battery pack assembly comprising a battery pack and the battery pack protective plate;

[0023] The battery pack guard plate is connected to the bottom of the battery pack. In a third aspect, an embodiment of the present application provides an electric device, the electric device comprising the battery pack assembly.

[0024] In the embodiment of the present application, the battery pack shield includes: a shield body and a seal; the shield body is a titanium alloy shield; the seal is connected to the side of the shield body close to the battery pack to seal the shield body and the battery pack. The use of a titanium alloy shield can improve the structural strength of the shield body and enhance the corrosion resistance of the shield body, so that the shield body has excellent resistance to strong acids and alkalis, greatly reducing the risk of corrosion to the shield body by external gases or liquids, and also reducing the corrosion of the shield body caused by water vapor or water liquid generated by heat exchange during the operation of the battery pack, and can also reduce the risk of corrosion to the shield body caused by thermal runaway of the battery pack under abnormal working conditions and the release of high temperature or corrosive gas and liquid. In addition, the connection position between the guard plate body and the battery pack is sealed by a sealing ring, so that the battery pack guard plate has good airtightness to the battery pack, reducing the external gas or liquid from the connection position between the guard plate body and the battery pack to penetrate into the battery pack, so that the sealing ring can effectively waterproof the battery pack guard plate, reduce the problem of liquid easily being retained on the side of the battery pack guard plate close to the battery pack, and improve the sealing and corrosion resistance of the battery pack guard plate. In this way, there is no need to set the first anti-corrosion plate and the second anti-corrosion plate to be connected to the two sides of the steel plate respectively, which simplifies the processing technology of the battery pack guard plate and reduces its weight, which is conducive to the lightweight design of the product.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of a battery pack protective plate described in an embodiment of the present application.

[0028] Figure numerals: 10 - guard plate body; 20 - sealing member; 13 - mounting portion; 11 - connecting portion; 12 - reinforcing portion; 30 - raised portion; A - first direction; B - second direction. DETAILED DESCRIPTION

[0029] The embodiments of the utility model will be 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 utility model, and cannot be understood as limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Reference Figure 1 , shows a schematic structural diagram of a battery pack guard plate according to an embodiment of the present application, which may specifically include: a guard plate body 10 and a sealing member 20;

[0034] The guard plate body 10 is a titanium alloy guard plate;

[0035] The sealing member 20 is connected to a side of the shield body 10 close to the battery pack to seal between the shield body 10 and the battery pack.

[0036] In the embodiment of the present application, the guard plate body 10 is used to connect to the bottom of the battery pack to seal the bottom of the battery pack. The use of a titanium alloy guard plate can enhance the structural strength and corrosion resistance of the guard plate body 10, and has excellent performance of strong acid and alkali resistance, greatly reducing the risk of corrosion to the guard plate body 10 by external gas or liquid, and also reducing the corrosion of the guard plate body 10 caused by water vapor or water liquid generated by heat exchange during the operation of the battery pack, and can also reduce the risk of corrosion to the guard plate body 10 caused by high temperature or corrosive gas and liquid released by the battery pack under abnormal working conditions. In addition, the seal 20 is used to seal the connection position between the guard plate body 10 and the battery pack, so that the battery pack guard plate has good airtightness to the battery pack, reducing the infiltration of external gas or liquid from the connection position between the guard plate body 10 and the battery pack into the battery pack, reducing the problem of liquid retention on the side of the battery pack guard plate close to the battery pack, and improving the sealing and corrosion resistance of the battery pack guard plate. In this way, there is no need to set the first anti-corrosion plate and the second anti-corrosion plate to be respectively connected to the two sides of the steel plate, which simplifies the processing technology of the battery pack protective plate and reduces its weight, which is conducive to the lightweight design of the product.

[0037] Compared with the combination of traditional steel and composite bottom guard plates in the prior art, the steel is embedded in the middle of the anti-corrosion layer composite material. Although this can effectively reduce the risk of product corrosion, the complexity of the process also increases. Furthermore, the anti-corrosion material is insulating, and it is impossible to collect information on the bottom guard plate, and it is impossible to monitor the damage of the guard plate through the BMS of the battery pack. In addition, compared with the traditional aluminum guard plate in the prior art, it can be completed only by cutting and punching, with a simple process and good anti-corrosion performance, but its strength is low, and it cannot play a good protective role for the battery pack. In addition, the traditional guard plate in the prior art is installed on the battery pack, so that there is a gap between the guard plate and the tray. Under long-term work, water will be hidden between the guard plate and the tray, causing the tray to corrode faster. The present application proposes to use a titanium alloy guard plate as the guard plate body 10 to improve its structural strength and corrosion resistance, and to set a seal, which can effectively prevent water and improve the anti-corrosion performance of the guard plate. Therefore, the battery protection plate of the embodiment of the present application reduces the disadvantages of steel and aluminum bottom guard plates, and highly combines the advantages of both, can realize the BMS monitorability of the battery pack, and has the advantages of high strength, good corrosion resistance, simple process, good waterproofness, good toughness, etc. Compared with the existing coating of corrosion-resistant materials on guard plates made of copper, aluminum and other materials, the battery protection plate of the embodiment of the present application also has better stability.

[0038] In addition, in the embodiment of the present application, the titanium alloy guard plate has a high strength. When vibration occurs during operation and transportation, the guard plate body 10 is not easily damaged by friction or scratches, thereby increasing the service life of the guard plate body 10. In addition, the titanium alloy guard plate also has a relatively low density, which makes the weight of the guard plate body 10 relatively light, and is convenient for handling, processing and transporting the battery pack guard plate, which is also conducive to the lightweight design of the product. In addition, the titanium alloy guard plate also has a relatively suitable fracture elongation rate, so that the guard plate body has good rigidity and is not easy to break. In summary, since the titanium alloy guard plate has good strength, corrosion resistance, acid and alkali resistance, and has low density and relatively suitable fracture elongation rate and other excellent properties, the guard plate body 10 has high structural strength, good corrosion resistance, low weight, and reduces its fracture risk, improves the corrosion resistance and structural stability of the battery pack guard plate, and reduces the weight of the battery pack guard plate.

[0039] Furthermore, in the process of processing, the titanium alloy guard plate can be processed by punching after stretching with a composite die, without going through the process of hot pressing and compounding, so that the processing technology of the guard plate body 10 is relatively simple, reducing the production cost. In addition, the titanium alloy guard plate does not need to set an insulating wrapping layer, and can directly realize the information collection of the battery pack, so that the BMS (Battery Management System) can monitor the working condition of the battery pack to determine whether it is damaged, etc., simplifying the structure of the battery pack guard plate.

[0040] In the embodiment of the present application, for example, the material model of the titanium alloy guard plate can be one of TA1, TA2, TA3, TC4, GR1 or GR2. The above materials all have good corrosion resistance, high structural strength, low density and more suitable elongation at break, and are common in the industrial field, widely used and easy to obtain.

[0041] For example, in the embodiment of the present application, the shape of the guard plate body 10 can be rectangular, square, oval, circular, etc., and can be set as needed according to the specific structure of the bottom of the battery pack. The embodiment of the present application does not limit the specific shape of the guard plate body 10.

[0042] In the embodiment of the present application, for example, the shape of the seal 20 is adapted to the shape of the guard plate body 10, and can be a rectangular ring, a square ring, a circular ring, etc. The embodiment of the present application does not limit the specific shape of the seal 20.

[0043] Optionally, in an embodiment of the present application, the guard plate body 10 includes a mounting portion 13 and a reinforcement portion 12, the mounting portion 13 is arranged on the peripheral side of the reinforcement portion 12, the mounting portion 13 includes a flange, and the flange is used for assembly with external equipment. In this way, the flange of the mounting portion 13 facilitates the assembly of the battery pack guard plate and other external equipment, making the assembly simple and the operation convenient, which is conducive to improving the assembly efficiency. The mounting portion 13 is arranged on the peripheral side of the reinforcement portion 12, that is, the reinforcement portion 12 is arranged on the inner periphery of the mounting portion 13, and the reinforcement portion 12 has a better structural reinforcement effect on the middle area of ​​the guard plate body 10, and also reduces the interference between the mounting portion 13 and the reinforcement portion 12.

[0044] In the embodiment of the present application, optionally, the mounting portion 13 includes a connecting portion 11, which is disposed on a side of the mounting portion 13 close to the reinforcing portion 12, and the connecting portion 11 is configured to be connected and fixed to the sealing member 20. In this way, a connection position is provided for the sealing member 20 through the connecting portion 11. Specifically, the connecting portion 11 is used to connect the battery pack, and the connecting portion 11 is connected to a side of the mounting portion 13 close to the reinforcing portion 12, and the sealing member 20 is connected to the connecting portion 11, so that the sealing member 20 provides a better seal for the connection between the guard plate body 10 and the battery pack, and reduces the interference between the sealing member 20 and the reinforcing portion 12 on the guard plate body 10.

[0045] For example, in an embodiment of the present application, the connecting portion 11 can be arranged along the circumference of the guard plate body 10, and thus the sealing member 20 can also be arranged along the circumference of the guard plate body 10, so that the circumference of the guard plate body 10 can be sealed by the sealing member 20, thereby improving the sealing effect between the guard plate body 10 and the battery pack.

[0046] In the embodiment of the present application, optionally, the sealing member 20 is a sealing ring, the connecting portion 11 is provided with a mounting step, and the sealing ring is clamped on the mounting step. In this way, the clamping connection between the sealing ring and the mounting step improves the connection reliability and stability between the sealing member and the connecting portion 11, so that the sealing member 20 is not easily separated from the guard plate body 10 due to friction or shaking during the driving of the vehicle or the transportation of the battery pack guard plate.

[0047] In addition, in the embodiment of the present application, a seal 20 can be set by gluing the connecting part 11 to further enhance the connection reliability between the seal and the guard plate body 10. The specific implementation of the seal 20 can be set according to actual needs, and the embodiment of the present application may not limit this.

[0048] For example, in the embodiment of the present application, the material of the sealing ring can be one of rubber or silicone. Since rubber or silicone is flexible and elastic, the seal 20 can have better sealing performance on the connection part 11 between the guard plate body 10 and the battery pack. In addition, when the battery pack vibrates during use or transportation, the rubber or silicone seal 20 can also provide a certain buffering effect, thereby reducing the impact and wear between the guard plate body 10 and the bottom of the battery pack.

[0049] Optionally, in the embodiment of the present application, the installation step is protruding from the connection portion 11, or the installation step is recessed in the connection portion 11. In this way, when the installation step protrudes from the connection portion 11, specifically, the height of the installation step can be set slightly higher than the height of the reinforcing portion 12, and the sealing ring is clamped on the protruding installation step, so that there is a more stable clamping effect between the sealing member 20 and the connection portion 11. In the case where the installation step is recessed in the connection portion 11, the sealing ring can be at least partially embedded in the recessed installation step to improve the stability of the clamping between the sealing member 20 and the connection portion 11.

[0050] In the embodiment of the present application, optionally, the guard plate body 10 includes a reinforcement portion 12, and the reinforcement portion 12 is further provided with a protrusion 30, and the protrusion 30 protrudes toward the bottom of the battery pack to improve the structural strength of the guard plate body 10. In this way, the shape structure of the reinforcement portion 12 of the guard plate body 10 is changed by the protruding protrusion 30, so that the structural strength of the guard plate body 10 is further enhanced, so that the guard plate body 10 has better structural stability.

[0051] Optionally, in the embodiment of the present application, the protrusion 30 extends along the first direction A; the number of the protrusions 30 is multiple, and the multiple protrusions 30 are arranged at intervals along the second direction B; wherein the first direction A and the second direction B are arranged at an angle. Specifically, the first direction A can be the length direction of the guard plate body 10, so that the protrusion 30 extends along the length direction of the guard plate body 10, that is, the first direction A, and can play a role in structural reinforcement of the guard plate body 10 in a large area in the length direction. In addition, a plurality of protrusions 30 spaced apart along the second direction B are provided, which further expands the setting area of ​​the protrusion 30 on the guard plate body 10, so that the guard plate body 10 has better structural strength and is not easily damaged or deformed.

[0052] For example, in the embodiment of the present application, the first direction A and the second direction B can be set at an angle of 60°, or at an angle of 80°, 70°, etc., and the embodiment of the present application does not limit the specific angle between the first direction A and the second direction B. In addition, the first direction A and the second direction B can also be set at an angle of 90°, that is, the first direction and the second direction can be set perpendicularly, so that the structure of the multiple protrusions 30 on the reinforcement part 12 is relatively compact, which plays a role in structural reinforcement of the guard plate body 10 in a larger area, and further improves the structural strength of the guard plate body.

[0053] For example, in the embodiment of the present application, the cross-sectional shape of the protrusion 30 along the second direction B can be a rectangle, an I-shaped or a trapezoid. In this way, a more common and easy-to-process shape structure is adopted, which reduces the difficulty of the processing technology of the protrusion 30 and makes the protrusion 30 have better structural strength. In the case where the number of protrusions 30 is multiple, the cross-sectional shapes of the multiple protrusions 30 can all be rectangular, or they can all be I-shaped or trapezoidal. It can also be set that the cross-sectional shape of some of the protrusions 30 is a rectangle, the cross-sectional shape of some of the protrusions 30 is a trapezoid, and the cross-sectional shape of the remaining protrusions 30 is an I-shaped, etc., that is, the cross-sectional shapes of the multiple protrusions 30 can be the same or different, and can be set according to actual needs. The structural strength of the reinforcing portion 12 is further improved by the combination of different shapes. The specific cross-sectional shape of the protrusion 30 in the embodiment of the present application may not be limited. In the embodiment of the present application, optionally, the reinforcing portion 12 and the connecting portion 11 are an integrally formed structure. In this way, the connection strength between the reinforcing portion 12 and the connecting portion 11 is high, so that the guard plate body 10 has better structural stability, and reduces material loss and manufacturing processes.

[0054] Optionally, in the embodiment of the present application, the strength of the guard plate body 10 is greater than or equal to 500MPa. In this way, the guard plate body 10 has sufficient strength, which improves the structural stability of the guard plate body 10. During transportation and operation, the guard plate body 10 is not easily damaged by friction or scratches due to shaking, thereby extending its service life. In addition, when the thickness of the guard plate body 10 is set to be relatively small, the guard plate body 10 has sufficient structural stability, so there is no need to increase the strength of the guard plate body 10 through a thickening design, which saves materials and makes the cost of the guard plate body 10 relatively low, which is conducive to reducing production costs and improving its economic benefits.

[0055] For example, the strength of the titanium alloy guard plate in the present application can reach 892MPa. Compared with the strength of the steel guard plate in the prior art, which is usually 400MPa, and the strength of the aluminum steel plate, which is usually 245MPa, the titanium alloy guard plate used in the present application greatly improves the strength of the guard plate body 10. Specifically, the strength of the guard plate body 10 can be 600MPa, 700MPa, or 800MPa, 850MPa, etc., which can be set according to actual needs. The specific strength value of the guard plate body 10 is not limited in the embodiment of the present application.

[0056] Optionally, in the embodiment of the present application, the density of the guard plate body 10 is less than or equal to 4.5 g / cm 3 In this way, the guard plate body 10 is lighter, which greatly reduces the weight of the battery pack guard plate, and is conducive to the lightweight design of the product. The problem that the density of the guard plate body 10 is high, resulting in a heavy weight of the battery pack guard plate, which is not conducive to processing or transportation, is reduced.

[0057] In the embodiment of the present application, the density of the titanium alloy guard plate can be generally 4.5g / cm 3. Compared with the steel guard plate in the prior art, which is generally 7.93g / cm 3, the battery pack guard plate is relatively heavy and difficult to assemble and transport. The titanium alloy guard plate used in the present application greatly reduces the weight of the guard plate body 10, which is conducive to the lightweight design of the product. For example, the density of the guard plate body 10 can be 7.5g / cm 3, 6g / cm 3, 5g / cm 3 or 4.5g / cm 3, etc. The specific density of the guard plate body 10 is not limited in the embodiment of the present application.

[0058] In some optional embodiments of the present application, the fracture elongation of the guard plate body 10 is any value between 10% and 20%. In this way, the use of a titanium alloy guard plate allows the guard plate body 10 to have a more suitable fracture strength, reduces the risk of the guard plate body 10 being easily brittle fractured due to its low fracture elongation, reduces the problem of the guard plate body 10 being easily cracked when impacted, and also reduces the problem of the guard plate body 10 having a high fracture elongation, which makes its extension length longer and leads to a low rigidity of the guard plate body 10.

[0059] In the embodiment of the present application, the fracture extension rate of the titanium alloy guard plate can generally be 14%. Compared with the fracture extension rate of the steel guard plate in the prior art, which is generally 40%, the titanium alloy guard plate used in the present application greatly reduces the risk of the guard plate body 10 being easily broken, has good structural stability, and extends its service life. For example, the fracture extension rate of the guard plate body can also be 10%, 15%, 20%, etc., and the embodiment of the present application does not limit the specific fracture extension rate of the guard plate body.

[0060] In summary, the battery pack protective plate described in the embodiment of the present application can at least include the following advantages:

[0061] In the embodiment of the present application, the battery pack shield includes: a shield body and a seal; the shield body is a titanium alloy shield; the seal is connected to the side of the shield body close to the battery pack to seal the shield body and the battery pack. The use of a titanium alloy shield can improve the structural strength of the shield body and enhance the corrosion resistance of the shield body, so that the shield body has excellent resistance to strong acids and alkalis, greatly reducing the risk of corrosion to the shield body by external gases or liquids, and also reducing the corrosion of the shield body caused by water vapor or water liquid generated by heat exchange during the operation of the battery pack, and can also reduce the risk of corrosion to the shield body caused by thermal runaway of the battery pack under abnormal working conditions and the release of high temperature or corrosive gas and liquid. In addition, the connection position between the guard plate body and the battery pack is sealed by a sealing ring, so that the battery pack guard plate has good airtightness to the battery pack, reducing the external gas or liquid from the connection position between the guard plate body and the battery pack to penetrate into the battery pack, so that the sealing ring can effectively waterproof the battery pack guard plate, reducing the problem of liquid being easily retained on the side of the battery pack guard plate close to the battery pack, and improving the sealing and corrosion resistance of the battery pack guard plate. In this way, there is no need to set the first anti-corrosion plate and the second anti-corrosion plate to be connected to the two sides of the steel plate respectively, which simplifies the processing technology of the battery pack guard plate and reduces its weight, which is conducive to the lightweight design of the product.

[0062] The embodiment of the present application also proposes a battery pack assembly, which includes a battery pack and the battery pack protective plate; the battery pack protective plate is connected to the bottom of the battery pack.

[0063] For example, in the embodiments of the present application, the battery pack may be a square shell battery pack, a cylindrical battery pack, a soft pack battery pack, etc. The embodiments of the present application may not limit the specific type of the battery pack.

[0064] The battery pack assembly described in the embodiment of the present application may at least include the following advantages:

[0065] In an embodiment of the present application, the battery pack assembly includes a battery pack and the battery pack guard plate; the battery pack guard plate is connected to the bottom of the battery pack. The battery pack guard plate includes: a guard plate body and a seal; the guard plate body is a titanium alloy guard plate; the seal is connected to the side of the guard plate body close to the battery pack to seal the guard plate body and the battery pack. The use of a titanium alloy guard plate can improve the structural strength of the guard plate body and enhance the corrosion resistance of the guard plate body, so that the guard plate body has excellent resistance to strong acids and alkalis, greatly reducing the risk of corrosion to the guard plate body by external gases or liquids, and also reducing the corrosion of the guard plate body caused by water vapor or water liquid generated by heat exchange during the operation of the battery pack, and can also reduce the risk of corrosion to the guard plate body caused by the release of high temperature or corrosive gas and liquid due to thermal runaway of the battery pack under abnormal working conditions. In addition, the connection position between the guard plate body and the battery pack is sealed by a sealing ring, so that the battery pack guard plate has good airtightness to the battery pack, reducing the possibility of external gas or liquid infiltrating into the battery pack from the connection position between the guard plate body and the battery pack, so that the sealing ring can effectively waterproof the battery pack guard plate, reducing the problem of liquid being easily retained on the side of the battery pack guard plate close to the battery pack, and improving the sealing and corrosion resistance of the battery pack guard plate. In this way, there is no need to set the first anti-corrosion plate and the second anti-corrosion plate to be connected to both sides of the steel plate respectively, which simplifies the processing technology of the battery pack guard plate and reduces its weight, which is conducive to the lightweight design of the product.

[0066] The embodiment of the present application also proposes an electrical device, which includes the battery pack assembly.

[0067] For example, in the embodiment of the present application, the electrical equipment may be a vehicle, an energy storage cabinet or an aircraft, etc., and the embodiment of the present application may not limit the specific type of the electrical equipment. The vehicle may specifically include a small car, a medium car, a three-box car, a truck, a trailer, a CDV (CXr DerivedVXn, a van based on a sedan platform), an MPV (multi-Purpose Vehicles), an SUV (Sport Utility Vehicles), etc. The embodiment of the present application may not limit this.

[0068] The electrical equipment described in the embodiments of the present application may at least have the following advantages:

[0069] In an embodiment of the present application, the electrical equipment includes the battery pack assembly, which includes a battery pack and the battery pack shield; the battery pack shield is connected to the bottom of the battery pack. The battery pack shield includes: a shield body and a seal; the shield body is a titanium alloy shield; the seal is connected to the side of the shield body close to the battery pack to seal the shield body and the battery pack. The use of a titanium alloy shield can improve the structural strength of the shield body and enhance the corrosion resistance of the shield body, so that the shield body has excellent resistance to strong acids and alkalis, greatly reducing the risk of corrosion to the shield body by external gases or liquids, and also reducing the corrosion of the shield body caused by water vapor or water liquid generated by heat exchange during the operation of the battery pack, and can also reduce the risk of corrosion to the shield body caused by thermal runaway of the battery pack releasing high temperature or corrosive gas and liquid under abnormal working conditions. In addition, the connection position between the guard plate body and the battery pack is sealed by a sealing ring, so that the battery pack guard plate has good airtightness to the battery pack, reducing the possibility of external gas or liquid infiltrating into the battery pack from the connection position between the guard plate body and the battery pack, so that the sealing ring can effectively waterproof the battery pack guard plate, reducing the problem of liquid being easily retained on the side of the battery pack guard plate close to the battery pack, and improving the sealing and corrosion resistance of the battery pack guard plate. In this way, there is no need to set the first anti-corrosion plate and the second anti-corrosion plate to be connected to both sides of the steel plate respectively, which simplifies the processing technology of the battery pack guard plate and reduces its weight, which is conducive to the lightweight design of the product.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present invention 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 invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack protective plate, characterized in that: The battery pack guard plate comprises: a guard plate body and a sealing member; The guard plate body is a titanium alloy guard plate; The sealing member is connected to a side of the guard plate body close to the battery pack to seal between the guard plate body and the battery pack.

2. The battery pack protective plate according to claim 1, characterized in that: The guard plate body comprises a mounting portion and a reinforcement portion, wherein the mounting portion is arranged on the peripheral side of the reinforcement portion; The mounting portion includes a flange, and the flange is used for assembly with external equipment.

3. The battery pack protective plate according to claim 2, characterized in that: The mounting portion comprises a connecting portion, the connecting portion is arranged on a side of the mounting portion close to the reinforcing portion, and the connecting portion is configured to be connected and fixed to the sealing component.

4. The battery pack protective plate according to claim 3, characterized in that: The sealing member is a sealing ring, the connecting portion is provided with a mounting step, and the sealing ring is clamped on the mounting step.

5. The battery pack protective plate according to claim 1 or 2, characterized in that: The guard plate body includes a reinforcement portion, the reinforcement portion is provided with a protrusion, and the protrusion protrudes toward the bottom of the battery pack to improve the structural strength of the guard plate body.

6. The battery pack protective plate according to claim 5, characterized in that: The protrusion extends along a first direction; There are multiple protrusions, and the multiple protrusions are arranged at intervals along the second direction; Wherein, the first direction and the second direction are arranged at an angle.

7. The battery pack protective plate according to claim 6, characterized in that: The cross-sectional shape of the protrusion along the second direction is rectangular, cross-shaped or trapezoidal.

8. The battery pack protective plate according to claim 3, characterized in that: The reinforcing portion and the connecting portion are an integrally formed structure.

9. The battery pack protective plate according to claim 1, characterized in that: The strength of the guard plate body is greater than or equal to 500 MPa.

10. The battery pack protective plate according to claim 1, characterized in that: The density of the guard plate body is less than or equal to 4.5 g / cm 3.

11. The battery pack protective plate according to claim 1, characterized in that: The fracture elongation rate of the guard plate body is any value between 10% and 20%.

12. A battery pack assembly, characterized in that: The battery pack assembly comprises a battery pack and a battery pack protective plate according to any one of claims 1 to 11; The battery pack protective plate is connected to the bottom of the battery pack.

13. An electrical equipment, characterized in that: The electrical equipment includes the battery pack assembly according to claim 12.

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