Battery pack

Abstract

The present invention relates to a battery pack, which comprises a battery box body, a plurality of battery cells arranged in the battery box body, a battery cut-off unit, a battery management system and a battery box cover, the battery box cover comprises: a main cover covering the open end of the battery box body; the adapter cover is detachably mounted on one side, deviating from the battery box body, of the main cover and covers part of the main cover; the electric appliance bin is detachably installed on the side, away from the main cover, of the adapter cover, the electric appliance bin hunches up towards the side away from the main cover to form a first containing space, the main cover and the adapter cover are each provided with a first communication opening, and the first containing space communicates with the battery box body through the first communication openings; the first accommodating space is used for accommodating and hoisting the battery cut-off unit. According to the battery pack, the effective space provided by the battery box body for the battery monomers is increased, so that the number of the battery monomers contained in the battery box body with a specific size is increased or the same number of the battery monomers can be contained by adopting the battery box body with a smaller size, and the energy density of the battery pack is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack. Background Art

[0002] With the rapid expansion and development of the new energy market, the market share of new energy vehicles has gradually increased. As a result, power batteries, as the core components of new energy vehicles, are increasingly used in people's lives. As people's requirements for the energy density of power batteries become higher and higher, it is necessary to further improve the space utilization inside the power battery.

[0003] In traditional technology, the electrical control unit is often assembled inside the battery case, taking up a large space, thereby limiting the effective space provided by the battery case to the battery cells. As a result, a battery case of a specific size can accommodate fewer battery cells or the size of the battery case is larger when accommodating the same number of battery cells, which limits the improvement of the energy density of the power battery. Summary of the Invention

[0004] Based on this, it is necessary to provide a battery pack that can improve the battery energy density to address the problem that the battery box in traditional technology provides a small effective space for the battery cells, which limits the improvement of the power battery energy density.

[0005] In one aspect, the present application provides a battery pack, comprising a battery case, a plurality of battery cells disposed in the battery case, a battery disconnect unit, a battery management system, and a battery case cover, wherein the battery case cover comprises:

[0006] A main cover, which is provided on the open end of the battery box;

[0007] A transfer cover, detachably mounted on a side of the main cover facing away from the battery box and covering a portion of the main cover;

[0008] An electrical appliance compartment is detachably mounted on a side of the adapter cover facing away from the main cover, and the electrical appliance compartment is arched toward a side away from the main cover to form a first receiving space. The main cover and the adapter cover are both provided with a first communication port, and the first receiving space is connected to the battery box through the first communication port.

[0009] The first receiving space is used to receive and hoist the battery disconnection unit.

[0010] In one embodiment, a first sealing gasket is provided at the connection between the adapter cover and the main cover;

[0011] and / or

[0012] A second sealing gasket is provided at the connection between the electrical compartment and the adapter cover.

[0013] In one embodiment, a second receiving space is formed between the main cover and the adapter cover, and a second communication port is provided on the main cover, and the second receiving space is connected to the battery box through the second communication port;

[0014] The second receiving space is used to receive the main control unit of the battery management system.

[0015] In one embodiment, the main cover includes a main cover body and a support frame, the support frame is connected to the main cover body, and the second communication port is formed therebetween;

[0016] The adapter cover is arched toward a side away from the main cover to form an arched portion. The arched portion, the main cover body and the support frame together form the second receiving space. The support frame is used to support the main control unit.

[0017] In one embodiment, the adapter cover includes an adapter cover body and a first maintenance cover, and the adapter cover body is mounted on the main cover;

[0018] The adapter cover body is provided with a first maintenance opening, and the first maintenance cover is detachably mounted on the adapter cover body to open and close the first maintenance opening. When the first maintenance cover is mounted on the adapter cover body, it forms the second receiving space together with the adapter cover body and the main cover.

[0019] In one embodiment, the electrical appliance compartment includes a compartment body and a second maintenance cover, and the compartment body is detachably mounted on the adapter cover;

[0020] The warehouse body is provided with a second maintenance opening, and the second maintenance cover is detachably mounted on the warehouse body to open and close the second maintenance opening. When the second maintenance cover is mounted on the warehouse body, it forms the first receiving space together with the warehouse body.

[0021] In one embodiment, the battery box cover further includes a reinforcing plate, which is provided on a side of the main cover facing away from the adapter cover;

[0022] The reinforcing pressure plate is connected to the main cover, the first sealing gasket and the adapter cover in sequence to resist connection deformation.

[0023] In one embodiment, the main cover and the adapter cover are connected by a plurality of fixing screws, and the plurality of fixing screws are arranged in a ring shape;

[0024] The reinforcing pressure plate is in a ring shape that matches the shape formed by the multiple fixing screws. The multiple fixing screws are passed through the adapter cover, the first sealing gasket, the main cover and the reinforcing pressure plate to keep the four fixed.

[0025] In one embodiment, the main cover includes a first cover and a second cover that are detachably connected, and the adapter cover is detachably mounted on a side of the second cover facing away from the battery box body.

[0026] In one embodiment, the first accommodation space and the second accommodation space are arranged side by side at one end of the battery box cover and correspond to a plurality of the battery cells.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] For the battery pack provided by the present application, since the battery cut-off unit is hoisted in the first accommodation space formed in the electrical appliance compartment, compared with the prior art where the battery cut-off unit is installed inside the battery box body, the space occupied by the electrical control unit in the battery box body is reduced, so that the effective space that the battery box body can provide for the battery cells is increased. As a result, the number of battery cells that can be accommodated in a battery box body of a specific size is increased, or a battery box body of a smaller size can be used to accommodate the same number of battery cells, thereby improving the energy density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural diagram of a battery pack provided by an embodiment of the present application;

[0030] Figure 2 is Figure 1 an exploded view of the battery pack shown in ;

[0031] Figure 3 is Figure 1 a structural diagram of the battery box cover of the battery pack shown in ;

[0032] Figure 4 is Figure 3 an exploded view of the battery box cover shown in ;

[0033] Figure 5 is Figure 3 another exploded view of the battery box cover shown in ;

[0034] Figure 6 is a structural diagram of the battery cut-off unit installed in Figure 3 the battery box cover shown in ;

[0035] Figure 7 is Figure 6 an exploded view of the structure shown in ;

[0036] Figure 8 is Figure 6 another exploded view of the structure shown in ;

[0037] Figure 9 is Figure 1The structural diagram of the main control unit of the BMS is shown in the battery pack by hiding the second maintenance port;

[0038] Figure 10 For Figure 1 The structural diagram of another perspective of the battery pack shown in ( Figure 10 In, the battery box cover is flipped so as to be able to show the structure of the side of the battery box cover facing the battery box body).

[0039] Explanation of reference numerals:

[0040] 1000, battery pack; 100, battery box cover; 10, main cover; 11, first cover; 12, second cover; 13, first communication port; 14, second communication port; 15, main cover body; 16, support frame; 17, first side wall; 171, first flanging; 20, adapter cover; 21, arch portion; 22, adapter cover body; 221, first maintenance port; 23, first maintenance cover; 24, second side wall; 241, second flanging; 30, electrical compartment; 31, first accommodation space; 32, compartment body; 321, second maintenance port; 33, second maintenance cover; 40, first gasket; 50, second gasket; 60, second accommodation space; 70, reinforcement pressing plate; 80, third gasket; 200, battery box body; 300, battery cut-off unit; 400, main control unit; 500, slave control unit; 600, battery cell; 700, plug-in. Detailed implementation manners

[0041] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0047] Refer to Figure 1 and Figure 2 As shown in [relevant reference], an embodiment of the present application provides a battery pack 1000, which includes a battery box body 200, battery cells 600 and a battery box cover 100. The battery cells 600 are disposed in the battery box body 200, the battery box cover 100 covers the open end of the battery box body 200, and the battery box cover 100 and the battery box body 200 together form a receiving space for protecting the battery cells 600 located in the battery box body 200.

[0048] Refer to Figure 3, the battery box cover 100 includes a main cover 10, a transfer cover 20, and an electrical compartment 30. The main cover 10 is disposed on the open end of the battery box body 200. The transfer cover 20 is detachably mounted on the side of the main cover 10 facing away from the battery box body 200 and covers a part of the main cover 10. The electrical compartment 30 is detachably mounted on the side of the transfer cover 20 facing away from the main cover 10. That is, the battery box cover 100 is connected to the battery box body 200 through the main cover 10, and the transfer cover 20 serves as an intermediate cover to connect the electrical compartment 30 and the main cover 10. Since the transfer cover 20 is detachably connected to the main cover 10 and the electrical compartment 30 is detachably connected to the transfer cover 20, it is convenient to replace the transfer cover 20 and the electrical compartment 30 when they are damaged, and it is also convenient to replace the components installed in the transfer cover 20 and the electrical compartment 30 when they are damaged.

[0049] Specifically, one end of the battery box body 200 in the height direction ( Figure 1 the Z direction in this case) forms the above-mentioned open end. At this time, the main cover 10 is disposed on the battery box body 200 in the height direction, the transfer cover 20 is disposed on the side of the main cover 10 facing away from the battery box body 200 in the height direction, and the electrical compartment 30 is also installed on the side of the transfer cover 20 facing away from the main cover 10 in the height direction.

[0050] Among them, the transfer cover 20 covers a part of the main cover 10, that is, the transfer cover 20 and the main cover 10 have an overlapping part. In this way, the connection between the two is achieved through the overlapping part of the two.

[0051] In some embodiments, referring to Figure 4 , the main cover 10 includes a main cover body 15 and four first side walls 17 provided on four side edges of the main cover body 15. At this time, the main cover 10 is not a flat plate structure, but a receiving space is formed by the main cover body 15 and the four first side walls 17. In this way, when the battery box cover 100 is connected to the battery box body 200, the part of the battery box body 200 protruding from the battery box body 200 can be received in the receiving space. The transfer cover 20 includes a transfer cover body 22 and second side walls 24 connected to three side edges of the transfer cover body 22. The three second side walls 24 together form a clamping space and are respectively clamped with three first side walls 17 of the main cover 10. Specifically, one end of the first side wall 17 away from the main cover body 15 has a first flanging 171, one end of the second side wall 24 away from the transfer cover body 22 has a second flanging 241, and the three first flangings 171 respectively overlap with the three second flangings 241, and fixing members pass through the first flanging 171 and the second flanging 241 to fix both the main cover 10 and the transfer cover 20 to the battery box body 200.

[0052] It can be conceived that in other embodiments, the main cover 10 may also only include the main cover body 15, and the first side wall 17 may be omitted. At this time, the main cover 10 can be directly connected to the battery box body 200 through the main cover body 15. Moreover, the adapter cover 20 may also only include the adapter cover body 22, and the second side wall 24 may be omitted. At this time, the adapter cover 20 can be connected to the main cover 10 through the adapter cover body 22.

[0053] Further, referring to Figure 5 and Figure 6 , the electrical appliance compartment 30 arches towards the side away from the main cover 10 to form a first accommodation space 31. First communication ports 13 are provided on both the main cover 10 and the adapter cover 20. The first accommodation space 31 communicates with the battery box body 200 through the first communication ports 13. The battery pack 1000 further includes a battery disconnect unit 300, and the battery disconnect unit 300 is accommodated and hoisted in the first accommodation space 31. Specifically, the battery disconnect unit 300 is completely accommodated in the first accommodation space 31.

[0054] It should be noted here that the meaning of the battery disconnect unit 300 being accommodated and hoisted in the first accommodation space 31 is that the battery disconnect unit 300 is accommodated in the first accommodation space 31, and the battery disconnect unit 300 can be fixedly connected to the electrical appliance compartment 30. Optionally, after the battery disconnect unit 300 is installed, it is also connected to the assembled plug-in unit 700 (such as a high-voltage plug-in unit) on the electrical appliance compartment 30. Since the first accommodation space 31 communicates with the battery box body 200 through the first communication ports 13, after the battery disconnect unit 300 is installed in the first accommodation space 31, the battery disconnect unit 300 can be connected to the battery cells 600 located in the battery box body 200 through the first communication ports 13.

[0055] Among them, the battery disconnect unit 300 (abbreviated as BDU for Battery Disconnect Unit) is an important component in the battery pack 1000. It is mainly used to quickly disconnect the connection between the battery pack 1000 and the vehicle's electrical circuit in case of emergencies such as collisions and short circuits to prevent safety accidents.

[0056] With the above arrangement, since the battery disconnect unit 300 is hoisted in the first accommodation space 31 formed by the electrical appliance compartment 30, compared with the prior art where the battery disconnect unit 300 is installed inside the battery box body 200, the space occupied by the electrical control unit in the battery box body 200 is reduced, so that the effective space that the battery box body 200 can provide for the battery cells 600 is increased. As a result, the number of battery cells 600 that can be accommodated in a battery box body 200 of a specific size is increased, or the same number of battery cells 600 can be accommodated in a battery box body 200 with a smaller size, thereby improving the energy density of the battery pack 1000.

[0057] When assembling the battery pack 1000, the adapter cover 20 and the main cover 10 can be first connected and then jointly installed on the corresponding flange sealing surface of the battery box body 200. The electrical compartment 30 provides an installation condition for the battery cut-off unit 300. After fixing the battery cut-off unit 300 to the electrical compartment 30, the electrical compartment 30 is then installed on the corresponding flange surface of the adapter cover 20. The adapter cover 20 is equivalent to a sealable intermediate cover, achieving the effect of effectively sealing and connecting the electrical compartment 30 and the main cover 10.

[0058] Further, the adapter cover 20 is provided at one end of the main cover 10. In this way, the first receiving space 31 is provided at one end of the battery box cover 100. Specifically, the first receiving space 31 also corresponds to a plurality of battery cells 600. That is, in the height direction of the battery box body 200, the first receiving space 31 is opposite to the battery cells 600. Due to the fact that the first receiving space 31 is opposite to the battery cells 600, the battery cut-off unit 300 installed in the first receiving space 31 is opposite to the battery cells 600. That is, the battery cut-off unit 300 is located above the battery cells 600, avoiding the battery cut-off unit 300 occupying the space of the battery box body 200 in the length direction. That is, such a setting has the effect of reducing the length dimension of the battery pack 1000, making the battery pack 1000 structurally compact and improving the energy density of the battery pack 1000. Specifically, the battery cut-off unit 300 is hoisted above the battery cells 600 and has a certain gap from the battery cells 600, ensuring the heat dissipation requirements and electrical safety of the battery cut-off unit 300, ensuring the electrical clearance and creepage distance, and preventing high-voltage arcs and electric leakage.

[0059] In some embodiments, referring to Figure 7 , the main cover 10 includes a first cover 11 and a second cover 12 that are detachably connected, and the adapter cover 20 is detachably installed on the side of the second cover 12 facing away from the battery box body 200. Optionally, the first cover 11 and the second cover 12 are arranged in sequence in the length direction ( Figure 1 the X direction in

[0060] the battery box body 200). By setting the main cover 10 to include a first cover 11 and a second cover 12 that are detachably connected, when the main cover 10 is damaged, only the damaged first cover 11 or second cover 12 needs to be replaced, saving resources. At the same time, since the first cover 11 and the second cover 12 are detachably connected, when the internal electrical control unit is damaged, the second cover 12 can be removed for the repair of the electrical control unit.

[0061] In some embodiments, continue to refer to Figure 7The battery pack 1000 also includes a first sealing gasket 40, which is arranged at the connection between the adapter cover 22 and the main cover 15 to ensure the sealing effect between the adapter cover 20 and the main cover 10, thereby better protecting the battery cells 600 in the battery box 200.

[0062] Further, see Figure 5 The battery compartment cover 100 also includes a reinforcing plate 70, located on the side of the main cover 15 facing away from the adapter cover 22. The reinforcing plate 70, the main cover 15, the first gasket 40, and the adapter cover 22 are sequentially connected to prevent deformation during connection. Typically, the main cover 10 is a one-piece stamped sheet metal cover, and the adapter cover 20 is a cast aluminum secondary cover, connected by fixing screws. Because one-piece stamped sheet metal covers are relatively thin, the addition of the reinforcing plate 70 can prevent deformation of the sheet metal cover caused by compression of the first gasket 40, thereby ensuring a secure seal.

[0063] Specifically, the electrical appliance compartment 30 may also be a cast aluminum electrical appliance compartment 30. It should be understood that in other embodiments, there is no limitation on the material and molding method of the main cover 10, the adapter cover 20, and the electrical appliance compartment 30.

[0064] Furthermore, the main cover 15 and the adapter cover 22 are connected by multiple fixing screws arranged in a ring. The reinforcing plate 70 is annular in shape, matching the shape of the fixing screws. The fixing screws are inserted through the adapter cover 22, the first sealing gasket 40, the main cover 15, and the reinforcing plate 70 to connect them and ensure a secure connection.

[0065] In some embodiments, see Figure 8 and Figure 9 A second receiving space 60 is formed between the main cover 15 and the adapter cover 22. The main cover 15 is provided with a second communication port 14. The second receiving space 60 communicates with the battery case 200 via the second communication port 14. The main control unit 400 of the battery management system is housed within the second receiving space 60 and is connected to the internal structure of the battery case 200 via the second communication port 14. For example, it is connected to the slave control unit 500 of the battery management system within the battery case 200 via the second communication port 14. Specifically, the main control unit 400 is completely housed within the second receiving space 60.

[0066] The Battery Management System (BMS) is a system used to intelligently manage and maintain battery cells 600, monitor battery status, prevent overcharging and overdischarging, and extend battery life. The BMS collects and analyzes various battery parameters to ensure safe use during the charging and discharging process. It also interacts with other systems through communication interfaces, establishing coordinated control to ensure safe, reliable, and efficient operation of the entire system.

[0067] In the above arrangement, since a second receiving space 60 is formed between the main cover 15 and the adapter cover 22, the main control unit 400 of the BMS is received in the second receiving space 60. Compared with the prior art in which the main control unit 400 of the BMS is installed in the battery case 200, the space of the battery case 200 occupied by the electrical control unit is reduced, so that the effective space that the battery case 200 can provide to the battery cells 600 is increased, thereby increasing the number or volume of the battery cells 600 accommodated in the battery case 200, thereby improving the energy density of the battery pack 1000.

[0068] For further information, see Figure 10 , Figure 10 The position corresponding to the middle support frame 16 is where the second receiving space 60 is located. The second receiving space 60 and the first receiving space 31 are arranged side by side along the width of the battery case 200, and the second receiving space 60 corresponds to multiple battery cells 600. That is, in the height direction of the battery case 200, the second receiving space 60 and the battery cells 600 are opposite each other. Because the second receiving space 60 and the battery cells 600 are opposite each other, the main control unit 400 installed in the second receiving space 60 is opposite the battery cells 600. In other words, the main control unit 400 is located above the battery cells 600, avoiding it from occupying space in the battery case 200. This increases the number of battery cells 600 arranged, resulting in a compact structure and improving the energy density of the battery pack 1000. Specifically, a certain gap is provided between the main control unit 400 and the battery cells 600 in the height direction of the battery case 200, ensuring heat dissipation and electrical safety of the main control unit 400, and ensuring electrical clearance and creepage distance to prevent high-voltage arcing and leakage. Furthermore, when thermal runaway occurs in the battery cell 600 , the first receiving space 31 and the second receiving space 60 respectively provide a certain degree of protection for the battery disconnection unit 300 and the main control unit 400 .

[0069] Further, the first communication port 13 is disposed opposite to the battery cut-off unit 300 along the height direction of the battery box body 200, and the second communication port 14 is disposed offset from the main control unit 400 of the BMS along the height direction of the battery box body 200. In this way, it is convenient for the battery cut-off unit 300 to communicate with the battery cell 600 through the first communication port 13, and it is convenient for the main control unit 400 to be connected to the slave control unit 500 located at the edge position of the battery box body 100 through the second communication port 14.

[0070] It should be noted here that generally, in the length direction of the battery box body 200, the slave control unit 500 is disposed at the end of the battery box body 200. That is, in the length direction of the battery box body 200, the slave control unit 500 is located between the battery cell 600 and the side wall of the battery box body 200.

[0071] The first communication port 13 and the second communication port 14 are arranged in sequence along the width direction of the battery box body 200 ( Figure 1 the Y direction in the figure). In this way, the battery cut-off unit 300 and the main control unit 400 are arranged along the width direction of the battery box body 200, ensuring the structural compactness of the battery pack 1000.

[0072] Optionally, continue to refer to Figure 7 and Figure 8 The first gasket 40 surrounds the first communication port 13 and the second communication port 14, facilitating the installation of the first gasket 40 and ensuring the sealing effect between the main cover 10 and the adapter cover 20.

[0073] In some embodiments, continue to refer to Figure 8 The main cover 10 further includes a support frame 16. The support frame 16 is connected to the main cover body 15, and the second communication port 14 is formed therebetween. A part of the adapter cover 20 arches away from the main cover 10 to form an arched portion 21. The arched portion 21, the main cover body 15 and the support frame 16 together form a second accommodation space 60. The support frame 16 is used to support the main control unit 400. With this setting, on the one hand, the support frame 16 can support the main control unit 400, facilitating the installation of the main control unit 400; on the other hand, the main control unit 400 is supported on the support frame 16, and the support frame 16 can separate the main control unit 400 from the battery cell 600, ensuring the electrical clearance between the main control unit 400 and the battery cell 600.

[0074] Continue to refer to Figure 7Moreover, the adapter cover 20 further includes a first maintenance cover 23. A first maintenance opening 221 is provided on the adapter cover body 22. The first maintenance cover 23 is detachably mounted on the adapter cover body 22 to open and close the first maintenance opening 221. When the first maintenance cover 23 is mounted on the adapter cover body 22, it, together with the adapter cover body 22 and the main cover body 15, forms a second accommodation space 60. By providing the first maintenance opening 221 on the adapter cover body 22, it is convenient to perform maintenance on the main control unit 400 located in the second accommodation space 60.

[0075] It should be noted here that when there is a raised portion 21 on the adapter cover body 22, the first maintenance opening 221 is located on the raised portion 21.

[0076] The adapter cover 20 further includes a third gasket 80. The third gasket 80 is provided between the first maintenance cover 23 and the adapter cover body 22 to ensure the sealing effect between the first maintenance cover 23 and the adapter cover body 22, thereby better protecting the main control unit 400 located in the second accommodation space 60.

[0077] In some embodiments, with continued reference to Figure 7 , the battery pack 1000 further includes a second gasket 50. The second gasket 50 is provided at the connection position between the electrical appliance compartment 30 and the adapter cover 20 to ensure the sealing effect between the electrical appliance compartment 30 and the adapter cover 20, thereby being able to better protect the battery cells 600 in the battery box 200.

[0078] The electrical appliance compartment 30 includes a compartment body 32 and a second maintenance cover 33. The compartment body 32 is detachably mounted on the adapter cover 20. The compartment body 32 has a second maintenance opening 321. The second maintenance cover 33 is detachably mounted on the compartment body 32 to open and close the second maintenance opening 321. When the second maintenance cover 33 is mounted on the compartment body 32, it, together with the compartment body 32, forms a first accommodation space 31. By providing the second maintenance opening 321 on the compartment body 32, it is convenient to perform maintenance on the battery cut-off unit 300 located in the first accommodation space 31.

[0079] The electrical appliance compartment 30 further includes a fourth gasket. The fourth gasket is provided between the second maintenance cover 33 and the compartment body 32 to ensure the sealing effect between the second maintenance cover 33 and the compartment body 32, thereby better protecting the battery cut-off unit 300 located in the first accommodation space 31.

[0080] Another embodiment of the present application further provides an electrical device, including the above-mentioned battery pack 1000. Since the above-mentioned battery pack 1000 has beneficial effects, the electrical device including the above-mentioned battery pack 1000 has the same beneficial effects, which will not be elaborated in detail here.

[0081] Optionally, the electrical device is a vehicle, which 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.

[0082] It is worth noting that for pure electric vehicles, the above-mentioned batteries can be used as a driving power source, thereby replacing fossil fuels to provide driving power.

[0083] In other embodiments, there is no limitation on the type of electrical devices, such as electrical devices may also be ships, spacecraft, electric toys, electric tools, energy storage equipment, amusement equipment, elevators and lifting equipment, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys or electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.; energy storage equipment may be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment may be carousels, bungee jumping machines, etc. This application does not impose any special restrictions on the above-mentioned electrical devices.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A battery pack, comprising a battery box body (200), a plurality of battery cells (600) arranged in the battery box body (200), a battery cut-off unit (300), a battery management system, and a battery box cover (100), characterized in that, The battery box cover (100) includes: A main cover (10) covering the open end of the battery box body (200); An adapter cover (20) detachably mounted on a side of the main cover (10) away from the battery box body (200) and covering a part of the main cover (10); An electrical appliance compartment (30) detachably mounted on a side of the adapter cover (20) away from the main cover (10), and the electrical appliance compartment (30) arches away from the main cover (10) to form a first accommodation space (31). A first communication port (13) is provided on both the main cover (10) and the adapter cover (20), and the first accommodation space (31) communicates with the battery box body (200) through the first communication port (13); Wherein, the first accommodation space (31) is used for accommodating and hoisting the battery cut-off unit (300).

2. The battery pack according to claim 1, wherein A first gasket (40) is provided at a connection position between the adapter cover (20) and the main cover (10); And / or A second gasket (50) is provided at a connection position between the electrical appliance compartment (30) and the adapter cover (20).

3. The battery pack according to claim 1, characterized in that, A second accommodation space (60) is formed between the main cover (10) and the adapter cover (20). A second communication port (14) is provided on the main cover (10), and the second accommodation space (60) communicates with the battery box body (200) through the second communication port (14); Wherein, the second accommodation space (60) is used for accommodating the main control unit (400) of the battery management system.

4. The battery pack according to claim 3, wherein, The main cover (10) includes a main cover body (15) and a support frame (16). The support frame (16) is connected to the main cover body (15), and the second communication port (14) is formed therebetween; The adapter cover (20) arches away from the main cover (10) to form an arched portion (21). The arched portion (21), the main cover body (15) and the support frame (16) jointly form the second accommodation space (60), and the support frame (16) is used for supporting the main control unit (400).

5. The battery pack according to claim 3, characterized in that, The adapter cover (20) includes an adapter cover body (22) and a first maintenance cover (23). The adapter cover body (22) is mounted on the main cover (10); A first maintenance port (221) is provided on the adapter cover body (22). The first maintenance cover (23) is detachably mounted on the adapter cover body (22) to open and close the first maintenance port (221). When the first maintenance cover (23) is mounted on the adapter cover body (22), it jointly forms the second accommodation space (60) with the adapter cover body (22) and the main cover (10).

6. The battery pack according to claim 1, wherein The electrical appliance compartment (30) includes a compartment body (32) and a second maintenance cover (33). The compartment body (32) is detachably mounted on the adapter cover (20); The housing body (32) is provided with a second maintenance opening (321), and the second maintenance cover (33) is detachably mounted on the housing body (32) to open and close the second maintenance opening (321). When the second maintenance cover (33) is mounted on the housing body (32), it forms the first accommodation space (31) together with the housing body (32).

7. The battery pack according to claim 2, characterized in that, The battery box cover further includes a reinforcing pressing plate (70), and the reinforcing pressing plate (70) is arranged on a side of the main cover (10) facing away from the adapter cover (20). The reinforcing pressing plate (70) is sequentially connected to the main cover (10), the first gasket (40), and the adapter cover (20) to resist connection deformation.

8. The battery pack according to claim 7, wherein The main cover (10) and the adapter cover (20) are connected by a plurality of fixing screws, and the plurality of fixing screws are arranged in a ring shape. The reinforcing pressing plate (70) is in a ring shape matching the shape formed by the plurality of fixing screws, and the plurality of fixing screws pass through the adapter cover (20), the first gasket (40), the main cover (10), and the reinforcing pressing plate (70) to keep the four fixed.

9. The battery pack according to claim 1, wherein The main cover (10) includes a first cover (11) and a second cover (12) which are detachably connected, and the adapter cover (20) is detachably mounted on a side of the second cover (12) facing away from the battery box body (200).

10. The battery pack according to claim 3, characterized in that, The first accommodation space (31) and the second accommodation space (60) are arranged side by side at one end of the battery box cover (100) and correspond to a plurality of the battery cells (600).

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