Battery pack box body, battery pack and power utilization device

Abstract

The utility model discloses a battery pack box body, a battery pack and an electric device. The battery pack box body comprises a box body and a box cover; the box body is used for accommodating a battery module and is provided with at least one clamping groove; the box cover is provided with buckles matched with the clamping grooves. The box body is provided with an installation groove, the box cover is provided with a sealing cover piece used for sealing the installation groove, the installation groove and the sealing cover piece are matched to form a sealing cavity, the installation groove is provided with an air extraction opening, and the sealing cavity is communicated with the outside through the air extraction opening. The sealing cavity is subjected to air extraction through the air extraction opening, the air pressure in the sealing cavity is lower than the external air pressure, the box body and the box cover are tightly pressed through the external air pressure, and then the box body and the box cover are tightly connected in cooperation with at least one clamping structure. Compared with the case body and the case cover which are connected through bolts, the structure is simple, mounting and dismounting are easy and convenient, and the manufacturing cost and the using cost of the bolts are saved.

Description

Technical Field

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

[0002] With the development of secondary battery technology such as lithium-ion batteries, secondary batteries are widely used in energy storage systems such as hydropower, thermal power, wind power and solar power stations, as well as in power tools, electric bicycles, electric motorcycles, electric vehicles, aerospace and other fields.

[0003] In the above fields, the capacity of lithium-ion battery cells cannot meet the use requirements, and multiple lithium-ion battery cells need to be connected in series or in parallel to form a battery pack. The battery pack is isolated from the outside world by the battery pack box, which plays the role of sealing, heat preservation and protection of the battery. The existing battery pack box mostly uses bolts to connect the box body and the box cover, which has a complex connection structure and high production and operating costs. Summary of the invention

[0004] In view of the above problems, the present application provides a battery pack case, a battery pack and an electrical device, which can solve the problems of complex connection structure of the battery pack case and high manufacturing and operating costs.

[0005] In the first aspect, the present application provides a battery pack case, comprising a case body and a case cover; the case body is used to accommodate a battery module, and the case body is provided with at least one card slot; the case cover is provided with a buckle matching the card slot; the case body is provided with a mounting groove, and the case cover is provided with a covering member for sealing the mounting groove, the mounting groove and the covering member cooperate to form a sealed cavity, the mounting groove is provided with an exhaust port, and the exhaust port connects the sealed cavity with the outside world.

[0006] In the technical solution of the embodiment of the present application, at least one card groove on the box body and the buckle on the box cover form at least one card connection structure between the box body and the box cover. The installation groove of the box body and the cover member of the box cover cooperate to form a sealed cavity. The sealed cavity is evacuated through the air suction port, and the sealed cavity forms a vacuum cavity. The air pressure in the sealed cavity is lower than the external air pressure. The external air pressure presses the box body and the box cover tightly, and then cooperates with at least one card connection structure to achieve a tight connection between the box body and the box cover, and the card connection structure can achieve quick installation. Compared with connecting the box body and the box cover by bolts, the structure is simple, installation and disassembly are simple, and the manufacturing cost and use cost of the bolts are saved.

[0007] In some embodiments, the mounting groove is configured as an annular groove arranged along the circumference of the opening of the box body, and sealing members are provided on both sides of the opening of the mounting groove. The annular mounting groove cooperates with the cover member to form an annular vacuum chamber, and the volume of the vacuum chamber is large, and the pressure difference between the inside and the outside is large, thereby increasing the pressing force of the air pressure on the box body and the box cover, so that the box body and the box cover are tightly connected. The sealing members on both sides of the mounting groove are pressed by the cover member, thereby enhancing the sealing of the vacuum chamber.

[0008] In some embodiments, the mounting slot is provided with a first card slot, and the box cover is provided with a first buckle matching the first card slot. The first buckle is assembled with the first card slot to complete the card connection between the box body and the box cover.

[0009] In some embodiments, the first card slot is configured as an annular through slot arranged along the circumference of the opening of the box body, and the first buckle is configured as an annular buckle arranged along the circumference of the opening of the box cover. The annular buckle is docked with the annular first card slot for installation, which increases the installation area of ​​the first buckle and the first card slot, and the installation is more stable. In addition, the first card slot is a through slot, and the first buckle penetrates the first card slot and enters the interior of the installation slot, which plays a certain sealing role in the sealing cavity formed by the installation slot and the cover member. The first buckle cooperates with the cover member to double-cover the installation slot, thereby enhancing the sealing of the sealing cavity.

[0010] In some embodiments, the first buckle includes an assembly portion and a clamping portion, the assembly portion cooperates with the first clamping slot to realize the assembly of the first buckle and the first clamping slot, and the clamping portion is used to prevent the first buckle from being separated from the first clamping slot. The clamping portion enters the installation slot from the first clamping slot and restricts the first buckle in the first clamping slot to prevent the first buckle from being separated from the first clamping slot, thereby preventing the box body and the box cover from being separated.

[0011] In some embodiments, the clamping portion is provided with a first limiting structure for preventing the first buckle from being separated from the first clamping slot. The first limiting structure serves to limit the first buckle in the first clamping slot to prevent the box body and the box cover from being separated due to a small external force.

[0012] In some embodiments, the cross section of the first card slot is rectangular, the cross section of the assembly portion is rectangular, and the size of the cross section of the assembly portion is the same as the size of the cross section of the first card slot; the first limiting structure includes a limiting barb arranged on the clamping portion. The cross section of the assembly portion and the cross section of the first card slot are rectangles of the same size, and the assembly portion fills the first card slot, which plays a certain sealing role in the sealed cavity. After the clamping portion enters the interior of the installation slot from the first card slot, the limiting barb is hung upside down on the inner wall of the installation slot to prevent the first buckle from detaching from the first card slot, thereby preventing the box body from being separated from the box cover.

[0013] In some embodiments, the cover member includes a cover portion for covering the opening of the mounting slot and a covering portion for covering the side of the mounting slot; the side wall of the mounting slot is provided with a second clamping slot, and the covering portion is provided with a second clamping buckle that cooperates with the second clamping slot. The second clamping buckle is clamped with the second clamping slot to achieve the installation of the box body and the box cover, and the clamping installation is convenient for both installation and removal, and can achieve quick removal and installation of the box body and the box cover.

[0014] In some embodiments, the second slot is configured as an annular slot arranged along the circumference of the opening of the box body, and the second buckle is configured as an annular buckle arranged along the circumference of the opening of the box cover. The cooperation between the annular buckle and the annular slot increases the installation area of ​​the second buckle and the second slot, and the installation is more stable.

[0015] In some embodiments, the second buckle is provided with a second limiting structure for preventing the second buckle from being separated from the second slot. After the second buckle is connected and installed with the second slot, the second limiting structure limits the second buckle in the second slot, ensuring that the second buckle will not be easily separated from the second slot, thereby ensuring the firmness of the connection between the box body and the box cover.

[0016] In some embodiments, the second limiting structure includes a limiting boss disposed at the end of the second buckle, a limiting groove for accommodating the limiting boss is disposed in the second slot, and an anti-locking structure for preventing the limiting boss from being locked in the limiting groove is disposed in the limiting groove. After the limiting boss and the limiting groove form a limit, the second buckle and the second slot are locked and limited, and the second buckle is restricted from being separated from the second slot. The anti-locking structure in the limiting groove ensures that the second buckle can be separated from the second slot when the box body is separated from the box cover.

[0017] In some embodiments, the seal includes a first seal ring, a second seal ring and a third seal ring, the first seal ring and the second seal ring are respectively arranged on both sides of the opening of the mounting groove, and the third seal ring is arranged on the side wall of the mounting groove. The three-layer seal ring forms a three-layer sealing structure between the box body and the box cover, which plays a role in strengthening the sealing of the gap between the box body and the box cover, and prevents external dust and water vapor from entering the battery pack box body. The first seal ring and the second seal ring arranged on both sides of the opening of the mounting groove play a role in strengthening the sealing of the sealed cavity formed by the mounting groove and the cover member, enhances the sealing of the sealed cavity, and prevents external air from entering the sealed cavity from the gap between the mounting groove and the cover member, thereby destroying the connection firmness between the box body and the box cover.

[0018] In some embodiments, the top of the installation groove is provided with a first receiving groove for receiving the first sealing ring and a second receiving groove for receiving the second sealing ring; the side wall of the installation groove is provided with a third receiving groove for receiving the third sealing ring. The three receiving grooves ensure the stability of the positions of the three sealing rings between the box body and the box cover, and the sealing will not fail due to the position deviation of the sealing ring.

[0019] In some embodiments, the cross-sections of the first sealing ring and the second sealing ring are rectangular; the cross-section of the third sealing ring is circular or elliptical. The first sealing ring and the second sealing ring with rectangular cross-sections have large contact areas with the box body and the box cover, and have good sealing effects. The cross-section of the third sealing ring is set to be circular or elliptical, which reduces the resistance during the combination of the box cover and the box body.

[0020] In some embodiments, the battery pack body further includes a one-way valve for blocking the air extraction port. When the sealed cavity is evacuated through the air extraction port, the one-way valve automatically opens, and after the evacuation is completed, the one-way valve is in a closed state under the pressure of the external atmospheric pressure.

[0021] In a second aspect, the present application provides a battery pack, which includes the battery pack case in the above embodiment and a battery module arranged in the battery pack case.

[0022] In a third aspect, the present application provides an electrical device, which includes the battery pack in the above embodiment, and the battery pack is used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0025] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0026] Figure 2 A schematic diagram of the structure of a battery pack box according to some embodiments of the present application;

[0027] Figure 3 A schematic diagram of the exploded structure of a battery pack box according to some embodiments of the present application;

[0028] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0029] Figure 5 This is a schematic diagram of the top surface structure of a battery pack box according to some embodiments of the present application;

[0030] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along direction B;

[0031] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0032] Figure 8 A schematic diagram of the cross-sectional structure of the air extraction port of the battery pack case of some embodiments of the present application;

[0033] Fig. 9 This is a schematic diagram of the structure of the first sealing ring in some embodiments of the present application;

[0034] Fig.10 for Fig. 9 A partial enlarged view of point D in the middle;

[0035] Fig.11 This is a schematic diagram of the structure of the third sealing ring in some embodiments of the present application;

[0036] Fig.12 for Fig.11 A partial enlarged view of point E in the middle.

[0037] The reference numerals in the specific implementation manner are as follows:

[0038] 1000. Vehicles;

[0039] 100, battery pack; 200, controller; 300, motor;

[0040] 10. Battery pack box;

[0041] 11. Box body; 111. Mounting parts;

[0042] 12, box cover; 121, cover member; 1211, cover portion; 1212, covering portion; 122, first buckle; 1221, assembly portion; 1222, clamping portion; 123, second buckle; 1231, second limiting structure;

[0043] 13, mounting slot; 131, first card slot; 132, first receiving slot; 133, second receiving slot; 134, third receiving slot; 135, second card slot;

[0044] 14. sealing member; 141. first sealing ring; 142. second sealing ring; 143. third sealing ring;

[0045] 15. One-way valve; 151. Valve body; 152. Cover plate; 153. Pin shaft; 154. Sealing piece. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0055] Battery cells or battery modules formed by connecting battery cells in series or in parallel need to be covered with an outer shell or placed in a box to form a battery pack. The battery pack box can not only play a role in protection, sealing and heat preservation, but also can be used to achieve the connection between the battery pack and electrical devices.

[0056] The existing battery pack box is generally fastened to the box body and the box cover by bolt connection. A battery pack generally requires 60-80 bolts, and during the installation process, it is necessary to adjust the hole position and ensure the tightening torque. The installation operation is cumbersome and not conducive to rapid modular integration.

[0057] In order to overcome the above problems, the present application provides a battery pack case, in which at least one card slot on the case and a buckle on the case cover form at least one card connection structure between the case and the case cover. The mounting slot of the case and the sealing member of the case cover cooperate to form a sealed cavity. The sealed cavity is evacuated through the vacuum port to form a vacuum cavity. The air pressure in the sealed cavity is lower than the external air pressure. The external air pressure presses the case and the case cover tightly, and then cooperates with at least one card connection structure to achieve a tight connection between the case and the case cover, and the card connection structure can be quickly installed. Compared with connecting the case and the case cover by bolts, the structure is simple, installation and disassembly are simple, and the manufacturing cost and use cost of the bolts are saved.

[0058] The battery pack box disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery pack box and battery pack disclosed in the present application can be used, so that the battery box and the box cover can be quickly disassembled and assembled.

[0059] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

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

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

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

[0063] According to some embodiments of the present application, referring to Figures 1 to 3 , and please refer to Figures 4 to 7 The present application provides a battery pack case 10, comprising a case 11 and a case cover 12; the case 11 is used to accommodate a battery module, and the case 11 is provided with at least one card slot; the case cover 12 is provided with a buckle matching the card slot; the case 11 is provided with a mounting groove 13, and the case cover 12 is provided with a cover member 121 for sealing the mounting groove 13, the mounting groove 13 and the cover member 121 cooperate to form a sealed cavity, and the mounting groove 13 is provided with an exhaust port, which connects the sealed cavity with the outside.

[0064] In the embodiment of the present application, the box body 11 and the box cover 12 are two parts that constitute the battery pack box body 10. The box body 11 has a receiving cavity for receiving the battery module. The box cover 12 is used to seal the receiving cavity of the box body 11, so as to encapsulate the battery module in the receiving cavity and isolate it from the outside world, thereby preventing external moisture and dust from affecting the battery module.

[0065] The card slots provided on the box body 11 and the buckles provided on the box cover 12 match to form a card connection structure, which is a structure that can be quickly disassembled and assembled. Compared with bolt connection, it can realize the rapid installation and removal of the box body and the box cover, and the connection cost of the card connection structure is low. At least one card slot is provided on the box body 11, and correspondingly, at least one buckle is also provided on the box cover 12, that is, the number of buckles is the same as the number of card slots, and each card slot has a buckle installed corresponding to it.

[0066] The mounting groove 13 is arranged as an open groove on the box body 11, and the cover member 121 is arranged on the box cover 12. After the box cover 12 is docked and fastened with the box body 11, the cover member 121 covers the opening of the mounting groove 13 to form a cover for the opening of the mounting groove 13. Moreover, because the box body 11 and the box cover 12 are tightly connected, the cover member 121 is pressed against the opening of the mounting groove 13, and the mounting groove 13 and the cover member 121 enclose a cavity sealed from the outside.

[0067] The mounting groove 13 is provided with an exhaust port, which passes through the groove wall of the mounting groove 13 to connect the interior of the mounting groove 13 with the outside. After the mounting groove 13 and the cover member 121 form a sealed cavity, the exhaust port serves as the only opening of the sealed cavity. Negative pressure is evacuated through the exhaust port to reduce the air pressure in the sealed cavity until the sealed cavity is evacuated into a vacuum, and a vacuum cavity is formed after the sealed cavity is evacuated.

[0068] It should be noted that the exhaust port is not a simple open port. When negative pressure vacuuming is not performed, the exhaust port is in a blocked state, isolating the sealed cavity from the outside world. When negative pressure vacuuming is performed, the exhaust port connects the sealed cavity with the outside world.

[0069] The mounting groove 13 can be fixedly connected to the box body 11 by welding, and the cover can also be fixedly connected to the box cover 12 by welding. The welding connection ensures the connection strength between the mounting groove 13 and the box body 11 and the connection strength between the cover 121 and the box cover 12. The mounting groove 13 can also be a part of the box body 11, that is, a groove is cut on the box body 11 as the mounting groove 13, and the cover 121 can also be a part of the box cover 12, that is, the cover 121 and the box cover 12 are integrally formed.

[0070] A mounting part 111 is provided on the box body 11, and a mounting hole is provided on the mounting part 111. A hole position corresponding to the mounting hole is provided on the vehicle 1000. When installing the battery pack box body 10, the mounting hole on the part box body 11 corresponds to the hole position on the vehicle 1000, and the battery pack box body 10 is installed on the vehicle 1000 by bolts.

[0071] At least one card groove on the box body 11 and the buckle on the box cover 12 form at least one card connection structure between the box body 11 and the box cover 12. The installation groove of the box body 11 and the cover member 121 of the box cover cooperate to form a sealed cavity. The sealed cavity is evacuated through the air suction port to form a vacuum cavity. The air pressure in the sealed cavity is lower than the external air pressure. The external air pressure presses the box body 11 and the box cover 12 tightly, and then cooperates with at least one card connection structure to achieve a tight connection between the box body 11 and the box cover 12, and the card connection structure can achieve quick installation. Compared with connecting the box body 11 and the box cover 12 by bolts, the structure is simple, installation and disassembly are simple, and the manufacturing cost and use cost of the bolts are saved.

[0072] According to some embodiments of the present application, optionally, please refer to Figures 3 to 7 The mounting groove 13 is configured as an annular groove arranged along the circumference of the opening of the box body 11 , and sealing members 14 are provided on both sides of the opening of the mounting groove 13 .

[0073] The box body 11 is an open structure, the opening edge of the box body 11 is annular, the mounting groove 13 is arranged along the edge of the box body 11 around the opening of the box body 11 to form an annular groove, and the opening direction of any position of the annular groove is the same. The annular mounting groove 13 and the cover member 121 form an annular sealing cavity arranged around the opening of the box body 11.

[0074] The opening of the annular installation groove 13 forms an annular opening around the opening of the box body 11, similar to the moat of a castle, and sealing members 14 are provided on both sides of the annular opening, that is, at least one seal is provided on both sides of the annular opening. After the cover member 121 covers the opening of the installation groove 13, the sealing member 14 blocks the gap between the cover member 121 and the installation groove 13.

[0075] The annular mounting groove 13 cooperates with the sealing member 121 to form an annular vacuum chamber. The vacuum chamber has a large volume and a large pressure difference between the inside and the outside, thereby increasing the pressing force of the air pressure on the box body 11 and the box cover 12, so that the box body 11 and the box cover 12 are tightly connected. The sealing members 14 on both sides of the mounting groove 13 are pressed by the sealing member 121, thereby enhancing the sealing of the vacuum chamber.

[0076] According to some embodiments of the present application, optionally, refer to Figure 3 and Figure 7 The mounting groove 13 is provided with a first card slot 131 , and the box cover 12 is provided with a first buckle 122 matching the first card slot 131 .

[0077] Because the mounting groove 13 is disposed on the box body 11 or is integrally formed with the box body 11, the first card groove 131 disposed on the mounting groove 13 is deemed to be disposed on the box body 11, and the first buckle 122 disposed on the box cover 12 is snap-connected with the first card groove disposed on the mounting groove 13 to realize the snap-connection between the box body 11 and the box cover 12.

[0078] The first buckle 122 is assembled with the first slot 131 to complete the connection between the box body 11 and the box cover 12 .

[0079] According to some embodiments of the present application, optionally, refer to Figure 4 and Figure 7 The first slot 131 is configured as an annular through slot arranged along the circumference of the opening of the box body 11 , and the first buckle 122 is configured as an annular buckle arranged along the circumference of the opening of the box cover 12 .

[0080] The annular through groove penetrates the groove wall of one side of the installation groove 13, connects the interior of the installation groove 13 with the outside, and forms an annular opening of the installation groove 13, that is, any position of the installation groove 13 along the opening circumference of the box body 11 has a first clamping groove 131. When the box body 11 and the box cover 12 are installed, the annular buckle is clamped in the annular through groove.

[0081] The first slot 131 may be an opening of the mounting slot 13 , that is, the mounting slot 13 is not provided with a separate first slot 131 , but is formed by the opening of the mounting slot 13 itself, and the first buckle 122 is snapped into the opening of the mounting slot 13 .

[0082] The annular buckle is butt-jointed with the annular first clamping groove 131, which increases the installation area of ​​the first buckle 122 and the first clamping groove 131, and the installation is more stable. In addition, the first clamping groove 131 is a through groove, and the first buckle 122 penetrates the first clamping groove 131 and enters the interior of the installation groove 13, which plays a certain sealing role in the sealing cavity formed by the installation groove 13 and the cover member 121. The first buckle 122 cooperates with the cover member 121 to double-cover the installation groove 13, thereby enhancing the sealing of the sealing cavity.

[0083] According to some embodiments of the present application, optionally, please refer to Figure 7 The first clip 122 includes an assembly portion 1221 and a clamping portion 1222 . The assembly portion 1221 cooperates with the first slot 131 to achieve assembly of the first clip 122 and the first slot 131 . The clamping portion 1222 is used to prevent the first clip 122 from detaching from the first slot 131 .

[0084] Because the first clamping groove 131 is an annular through groove that penetrates the installation groove 13, the annular first clamping buckle 122 penetrates the first clamping groove 131 and enters the interior of the installation groove 13 to achieve clamping with the first clamping groove 131. The first clamping portion 1222 is a portion that penetrates the first clamping groove 131 and enters the interior of the installation groove 13, that is, after the first clamping portion 1222 enters the interior of the installation groove 13, it forms a clamping connection with the first clamping groove 131. After the first clamping buckle 122 is clamped with the first clamping groove 131 through the clamping portion 1222, the assembly portion 1221 is a portion embedded in the interior of the first clamping groove 131, that is, the assembly portion 1221 cooperates with the first clamping groove 131, so that the clamping portion 1222 can enter the interior of the installation groove 13 and be clamped with the first clamping groove 131.

[0085] The engaging portion 1222 enters the installation slot 13 from the first slot 131 and restricts the first buckle 122 in the first slot 131 to prevent the first buckle 122 from escaping from the first slot 131 , thereby preventing the box body 11 and the box cover 12 from being separated.

[0086] According to some embodiments of the present application, optionally, please refer again to Figure 7 The clamping portion 1222 is provided with a first limiting structure for preventing the first buckle 122 from being separated from the first clamping slot 131 .

[0087] In order to realize the snap connection between the first snap buckle 122 and the first snap slot 131, it is necessary to perform appropriate limiting after the first snap buckle 122 and the first snap slot 131 are installed to prevent the first snap buckle 122 and the first snap slot 131 from being easily separated due to position changes or shaking of the box body 11 and the box cover 12. The limiting structure set in the snap connection part 1222 plays a limiting role.

[0088] Because the first card slot 131 is an open structure, when the box body 11 and the box cover 12 need to be separated, the opening of the first card slot 131 is opened with the help of external force, and the first buckle 122 can be disengaged from the first card slot 131 .

[0089] The first limiting structure serves to limit the first buckle 122 within the first locking groove 131 , thereby preventing the box body 11 and the box cover 12 from being separated due to a small external force.

[0090] According to some embodiments of the present application, optionally, please refer again to Figure 7 The cross section of the first slot 131 is rectangular, the cross section of the assembly portion 1221 is rectangular, and the size of the cross section of the assembly portion 1221 is the same as the size of the cross section of the first slot 131; the first limiting structure includes a limiting hook arranged on the clamping portion 1222.

[0091] The sides of the rectangle are straight sides. After the first buckle 122 is engaged with the first slot 131 , the straight sides of the assembly portion 1221 are in close contact with the straight sides of the first slot 131 .

[0092] The clamping portion 1222 is located at the end of the first clamping portion 122, and the limiting hook is located at the root of the clamping portion 1222. Specifically, the cross-section of the clamping portion 1222 is triangular or trapezoidal, and the limiting hook is the bottom edge of the triangle or the lower bottom edge of the trapezoid. The clamping portion 1222 completely enters the interior of the installation groove 13, and the bottom edge of the triangle or the lower bottom edge of the trapezoid hooks the inner wall of the first clamping groove 131, thereby realizing the clamping connection between the first clamping portion 122 and the first clamping groove 131.

[0093] The cross section of the assembly portion 1221 and the cross section of the first slot 131 are rectangles of the same size, and the assembly portion 1221 fills the first slot 131, which plays a certain sealing role in the sealed cavity. After the clamping portion 1222 enters the installation slot 13 from the first slot 131, the limiting barb is hung upside down on the inner wall of the installation slot 13, preventing the first buckle 122 from detaching from the first slot 131, thereby preventing the box body 11 from separating from the box cover 12.

[0094] According to some embodiments of the present application, optionally, please refer to Figure 4 and Figure 7 The cover member 121 includes a cover portion 1211 for covering the opening of the mounting groove 13 and a covering portion 1212 for covering the side of the mounting groove 13; the side wall of the mounting groove 13 is provided with a second card slot 135, and the covering portion is provided with a second buckle 123 that cooperates with the second card slot 135.

[0095] The cross-section of the cover member 121 is L-shaped, and one side of the L-shape is the cover portion 1211. The cover portion 1211 faces the opening of the mounting groove 13 and covers the opening of the mounting groove 13. The cover portion 1211 and the mounting groove 13 form a sealed cavity; the other side of the L-shape is the covering portion 1212, and the covering portion 1212 is tightly attached to the side wall of the mounting groove 13. The second clip 123 is embedded in the second clip groove 135 of the side wall of the mounting groove, forming a mounting structure from the side.

[0096] The second buckle 123 is engaged with the second slot 135 to realize the installation of the box body 11 and the box cover 12 . The engaging installation is convenient for both installation and disassembly, and the box body 11 and the box cover 12 can be quickly disassembled and assembled.

[0097] According to some embodiments of the present application, optionally, please refer to Figure 3 , Figure 4 and Figure 7 The second slot 135 is configured as an annular slot arranged along the circumference of the opening of the box body 11 , and the second buckle 123 is configured as an annular buckle arranged along the circumference of the opening of the box cover 12 .

[0098] A ring groove is formed around the opening of the box body 11 as the second slot 135, and the opening of the ring groove faces one side of the box body. The second buckle 123 forms a hook-like structure and is inserted into the second slot 135 from the side.

[0099] The cooperation between the annular buckle and the annular groove increases the installation area of ​​the second buckle 123 and the second slot 135, and the installation is more stable.

[0100] According to some embodiments of the present application, optionally, please refer to Figure 7 The second buckle 123 is provided with a second limiting structure 1231 for preventing the second buckle 123 from being separated from the second slot 135 .

[0101] A hook-shaped structure is provided at the end of the second clip 123 as the second limiting structure 1231. Correspondingly, a receiving portion for receiving the second limiting structure 1231 is provided inside the second clip slot 135. Because the second clip slot 135 is an open structure, when the box body 11 and the box cover 12 are installed, the opening of the second clip slot 135 is opened with the help of external force, and the second clip 123 with the hook-shaped second limiting structure 1231 is inserted into the second clip slot 135, and the second limiting structure 1231 is restricted in the receiving portion of the second clip slot 135. When the box body 11 and the box cover 12 need to be separated, the opening of the second clip slot 135 is opened again with the help of external force, and the second clip 123 is removed from the second clip slot 135.

[0102] After the second buckle 123 is snap-fitted and installed with the second slot 135 , the second limiting structure 1231 limits the second buckle 123 within the second slot 135 , ensuring that the second buckle 123 and the second slot 135 will not be easily separated, thereby ensuring the firmness of the connection between the box body 11 and the box cover 12 .

[0103] According to some embodiments of the present application, optionally, please continue to refer to Figure 7 The second limiting structure 1231 includes a limiting boss arranged at the end of the second buckle 123, and the second clamping groove 135 is provided with a limiting groove for accommodating the limiting boss, and the limiting groove is provided with an anti-locking structure for preventing the limiting boss from being locked in the limiting groove.

[0104] The side surface of the limiting groove close to the outside forms an inclined surface facing outward, and correspondingly, the side surface of the limiting boss close to the outside forms an inclined surface facing outward, and the two inclined surfaces facing outward are attached to each other to form an anti-locking structure.

[0105] After the limiting boss and the limiting groove form a limit, the second buckle 123 and the second clamping groove 135 are clamped and limited, and the second buckle 123 is restricted from being separated from the second clamping groove 135. The anti-locking structure in the limiting groove ensures that the second buckle 123 can be separated from the second clamping groove 135 when the box body 11 and the box cover 12 are separated.

[0106] According to some embodiments of the present application, optionally, please refer to Figure 3 and Figure 7 The sealing member 14 includes a first sealing ring 141 , a second sealing ring 142 and a third sealing ring 143 . The first sealing ring 141 and the second sealing ring 142 are respectively arranged on both sides of the opening of the installation groove 13 , and the third sealing ring 143 is arranged on the side wall of the installation groove 13 .

[0107] The three-layer sealing ring forms a three-layer sealing structure between the box body 11 and the box cover 12, which plays a role in strengthening the sealing of the gap between the box body 11 and the box cover 12, and prevents external dust and water vapor from entering the battery pack box body 10. The first sealing ring 141 and the second sealing ring 142 arranged on both sides of the opening of the mounting groove 13 play a role in strengthening the sealing of the sealed cavity formed by the mounting groove 13 and the cover 121, and enhance the sealing of the sealed cavity, and prevent external air from entering the sealed cavity from the gap between the mounting groove and the cover to destroy the connection firmness of the box body 11 and the box cover 12.

[0108] According to some embodiments of the present application, optionally, please refer to Figure 4 and Figure 7 The top of the installation groove 13 is provided with a first receiving groove 132 for receiving the first sealing ring 141 and a second receiving groove 133 for receiving the second sealing ring 142 ; the side wall of the installation groove 13 is provided with a third receiving groove 134 for receiving the third sealing ring 143 .

[0109] The three receiving grooves ensure the stability of the positions of the three sealing rings between the box body 11 and the box cover 12, and will not cause sealing failure due to position deviation of the sealing rings.

[0110] According to some embodiments of the present application, optionally, please refer to Figure 7 , Figures 9 to 12 The cross-sections of the first sealing ring 141 and the second sealing ring 142 are rectangular; the cross-section of the third sealing ring 143 is circular or elliptical.

[0111] The first sealing ring 141 and the second sealing ring 142 with rectangular cross sections have large contact areas with the box body 11 and the box cover 12, and good sealing effect. The cross section of the third sealing ring 143 is set to be circular or elliptical, which reduces the resistance during the combination of the box cover 12 and the box body 11.

[0112] According to some embodiments of the present application, optionally, please refer to Figure 8 The battery pack body 10 also includes a one-way valve 15 for sealing the exhaust port.

[0113] When the sealed cavity is not evacuated, the air outlet is in a blocked state. In order to facilitate vacuuming, the air outlet is blocked by a one-way valve 15, and the one-way valve 15 can only be opened outward. Specifically, the one-way valve 15 includes a valve body 151 and a cover plate 152. The valve body 151 is installed on the side wall of the mounting groove 13 by bolts, and the cover plate 152 is installed on the valve body 151 by a pin 153. The pin 153 is a spring pin. Under the elastic force of the spring pin, the cover plate 152 is pressed against the valve body 151 to block the air outlet. Under the action of an external force, the cover plate 152 is opened. The external force described here can be the suction force of negative pressure suction, that is, the air outlet of the negative pressure suction device covers the one-way valve 15. When the air is pumped, the negative pressure suction opens the cover plate 152. After the negative pressure suction stops, the cover plate 152 is reset under the action of the spring pin.

[0114] The inner surface of the cover plate 152 is provided with a sealing member 154 for sealing the air exhaust port. The sealing member 154 is a rubber member and its size is the same as that of the cross section of the air exhaust port. After the cover plate 152 is reset, the sealing member 154 is plugged into the air exhaust port to seal the air exhaust port.

[0115] When the sealed cavity is evacuated through the air suction port, the one-way valve 15 is automatically opened. After the evacuation is completed, the one-way valve 15 is in a closed state under the pressure of the external atmospheric pressure.

[0116] According to some embodiments of the present application, the present application also provides a battery pack, comprising a battery pack case as described in any of the above schemes and a battery module arranged in the battery pack case.

[0117] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery pack described in any of the above schemes, and the battery pack is used to provide electrical energy to the electrical device.

[0118] The power-consuming device may be any of the aforementioned devices or systems using the battery pack.

[0119] According to some embodiments of the present application, see Figures 3 to 7 The present application provides a battery pack case 10, including a first clamping structure formed by a first clamping groove 131 and a first buckle 122, and a second clamping structure formed by a second clamping groove 135 and a second buckle 123. The double-layer clamping structure realizes the rapid installation of the case 11 and the case cover 12. The side wall of the installation groove 13 is provided with an exhaust port, and the sealed cavity formed by the installation groove 13 and the cover 121 is exhausted by a negative pressure exhaust device, so that the sealed cavity forms a negative pressure cavity. The air pressure in the sealed cavity is lower than the external air pressure, and the external air pressure presses the case 11 and the case cover 12 tightly. The three-layer sealing structure formed by the first sealing ring 141, the second sealing ring 142 and the third sealing ring 143 meets the airtight requirements of the case 11 and the case cover 12 for better safety redundancy.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pack box, characterized in that: include: A box body, used to accommodate the battery module, wherein the box body is provided with at least one card slot; A box cover, wherein the box cover is provided with a buckle matching the card slot; The box body is provided with a mounting groove, the box cover is provided with a sealing member for sealing the mounting groove, the mounting groove and the sealing member cooperate to form a sealed cavity, the mounting groove is provided with an air extraction port, and the air extraction port connects the sealed cavity with the outside.

2. The battery pack box according to claim 1, characterized in that: The installation groove is configured as an annular groove arranged along the circumference of the opening of the box body, and sealing members are provided on both sides of the opening of the installation groove.

3. The battery pack box according to claim 2, characterized in that: The installation slot is provided with a first card slot, and the box cover is provided with a first buckle matching the first card slot.

4. The battery pack box according to claim 3, characterized in that: The first card slot is configured as an annular through slot arranged along the circumference of the opening of the box body, and the first buckle is configured as an annular buckle arranged along the circumference of the opening of the box cover.

5. The battery pack case according to claim 4, characterized in that: The first clip includes an assembly portion and a clamping portion, the assembly portion cooperates with the first card slot to achieve assembly of the first clip and the first card slot, and the clamping portion is used to prevent the first clip from detaching from the first card slot.

6. The battery pack case according to claim 5, characterized in that: The clamping portion is provided with a first limiting structure for preventing the first buckle from being separated from the first clamping slot.

7. The battery pack case according to claim 6, characterized in that: The cross section of the first slot is rectangular, the cross section of the assembly portion is rectangular, and the size of the cross section of the assembly portion is the same as the size of the cross section of the first slot; the first limiting structure includes a limiting barb arranged on the clamping portion.

8. The battery pack case according to claim 1, characterized in that: The cover member includes a cover portion for covering the opening of the mounting slot and a covering portion for covering the side of the mounting slot; a second clamping slot is provided on the side wall of the mounting slot, and the covering portion is provided with a second buckle that cooperates with the second clamping slot.

9. The battery pack case according to claim 8, characterized in that: The second clamping groove is configured as an annular groove arranged along the circumference of the opening of the box body, and the second buckle is configured as an annular buckle arranged along the circumference of the opening of the box cover.

10. The battery pack case according to claim 8, characterized in that: The second buckle is provided with a second limiting structure for preventing the second buckle from being separated from the second buckle slot.

11. The battery pack case according to claim 10, characterized in that: The second limiting structure includes a limiting boss arranged at the end of the second buckle, a limiting groove for accommodating the limiting boss is provided in the second clamping groove, and an anti-locking structure for preventing the limiting boss from being locked in the limiting groove is provided in the limiting groove.

12. The battery pack case according to claim 2, characterized in that: The sealing member comprises a first sealing ring, a second sealing ring and a third sealing ring. The first sealing ring and the second sealing ring are respectively arranged on both sides of the opening of the mounting groove, and the third sealing ring is arranged on the side wall of the mounting groove.

13. The battery pack case according to claim 12, characterized in that: The top of the installation groove is provided with a first receiving groove for receiving the first sealing ring and a second receiving groove for receiving the second sealing ring; the side wall of the installation groove is provided with a third receiving groove for receiving the third sealing ring.

14. The battery pack case according to claim 12, characterized in that: The cross-sections of the first sealing ring and the second sealing ring are rectangular; the cross-section of the third sealing ring is circular or elliptical.

15. The battery pack case according to any one of claims 1 to 14, characterized in that: The battery pack body also includes a one-way valve for blocking the air extraction port.

16. A battery pack, characterized in that: The battery pack includes a battery pack case according to any one of claims 1 to 15 and a battery module arranged in the battery pack case.

17. An electrical device, characterized in that: The electrical device comprises the battery pack as claimed in claim 16, and the battery pack is used to provide electrical energy.

Images