Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment. The battery device comprises a box body; the single battery and the electric control assembly are connected and are both mounted in the box body; the electric control assembly comprises a shell, the shell comprises a shell body, an accommodating cavity with one side open is formed in the shell body, an avoiding hole communicated with the accommodating cavity is formed in the shell body, and a positioning assembly is arranged on the shell body; the circuit board is provided with an electrical plug connector and a matching assembly, the positioning assembly is in positioning fit with the matching assembly, the circuit board is fixedly installed in the containing cavity, and the electrical plug connector penetrates through the receding hole and is in clearance fit with the receding hole; the cover body is arranged on the open side of the containing cavity and connected with the shell in a butt joint mode so as to cover the containing cavity. According to the battery device provided by the invention, the assembly gap between the electrical plug connector on the circuit board and the shell can be reduced, so that the assembly gap between the electrical plug connector on the circuit board and the shell effectively meets the requirement of a relatively high dustproof grade.

Description

Technical Field

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

[0002] In the related art, in a battery device, when the housing used for the electronic control component is used to install and fix the circuit board therein, there is a large assembly tolerance between the housing and the circuit board, making it difficult for the housing as a whole to meet the high dustproof grade requirements. Utility Model Content

[0003] The present application aims to solve the problem that there is a large assembly tolerance between the circuit board and the housing and cover of the housing used for the current electric control component, which makes it difficult for the assembly gap between the connector socket on the circuit board and the housing to meet the higher dustproof grade requirements after the circuit board is assembled in the housing. To this end, the present application provides a battery device and an electric device.

[0004] In a first aspect, the present application provides a battery device, comprising:

[0005] Box;

[0006] A battery cell and an electronic control component, wherein the battery cell and the electronic control component are connected and installed in the box;

[0007] Wherein, the electronic control component comprises a housing, and the housing comprises:

[0008] A shell is formed with a receiving cavity with one side open, a avoidance hole communicating with the receiving cavity is opened on the shell, and a positioning assembly is provided on the shell;

[0009] A circuit board is provided with an electrical connector and a matching component, the positioning component is positioned and matched with the matching component, the circuit board is fixedly installed in the accommodating cavity, the electrical connector passes through the avoidance hole and is gap matched with the avoidance hole;

[0010] The cover body is arranged on the open side of the accommodating cavity and is butt-jointed with the shell body to cover the accommodating cavity.

[0011] The battery device according to the first aspect of the present application has at least the following beneficial effects:

[0012] The battery device of the present application is provided with a positioning component and an avoidance hole on the shell through the matching arrangement of the shell, the circuit board and the cover of the outer shell in the electronic control component. The matching component on the circuit board and the positioning component on the shell are positioned and matched with each other to accurately position the assembly position of the circuit board on the shell. The relative position of the avoidance hole on the shell and the positioning component remains unchanged, and the matching component on the circuit board and the positioning component on the shell are positioned and matched with each other to constrain the specific position of the electrical connector on the circuit board passing through the avoidance hole on the shell, so that the gap between the electrical connector and the avoidance hole after passing through the avoidance hole is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector on the circuit board and the shell, so that the assembly gap between the electrical connector on the circuit board and the shell effectively meets the higher dustproof level requirements.

[0013] In some embodiments, the clearance fit tolerance δ1 between the electrical connector and the avoidance hole satisfies: 0mm<δ1≤0.5mm.

[0014] By such arrangement, the assembly gap between the electrical connector on the circuit board and the housing is controlled to be greater than 0 and less than or equal to 0.5 mm, so that the assembly gap between the electrical connector on the circuit board and the housing effectively meets the IP40 protection level requirement.

[0015] In some embodiments, the positioning component includes a first positioning column disposed on the shell, and the mating component includes a first positioning hole opened on the circuit board, and the first positioning column is inserted and mated with the first positioning hole.

[0016] In this way, the cooperation between the first positioning hole on the circuit board and the first positioning column on the shell constrains the specific position of the electrical connector on the circuit board passing through the avoidance hole on the shell, so that the gap between the electrical connector and the avoidance hole after passing through the avoidance hole is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector on the circuit board and the shell, so that the assembly gap between the electrical connector on the circuit board and the shell effectively meets the higher dustproof level requirements.

[0017] In some embodiments, the positioning component also includes a second positioning column arranged on the shell, the second positioning column and the first positioning column are respectively located on adjacent sides of the shell, and the mating component also includes a second positioning hole opened on the circuit board, and the second positioning column is inserted and mated with the second positioning hole.

[0018] In this way, the assembly position of the circuit board on the housing is positioned by two sets of hole-column matching structures, and the specific position of the electrical connector on the circuit board passing through the avoidance hole on the housing is accurately constrained.

[0019] In some embodiments, the projection length of a line between the position of the first positioning post and the position of the second positioning post in the length direction of the shell is greater than half of the length of the shell; and / or the projection length of a line between the position of the first positioning post and the position of the second positioning post in the width direction of the shell is greater than half of the width of the shell.

[0020] Such an arrangement enables the two sets of hole-column matching structures formed by the first positioning column and the first positioning hole and the second positioning column and the second positioning hole to be positioned to more than half of the structural area of ​​the circuit board, thereby improving the positioning accuracy of the assembly position of the circuit board on the housing.

[0021] In some embodiments, the outer diameter Φ1 of the first positioning column satisfies: 3.9 mm≤Φ1≤4.1 mm; and / or the outer diameter Φ2 of the second positioning column satisfies: 3.9 mm≤Φ2≤4.1 mm.

[0022] By configuring in this way, the manufacturing tolerance of the outer diameter Φ1 of the first positioning column and / or the outer diameter Φ2 of the second positioning column is controlled within the range of plus or minus 0.1 mm, which can reduce the manufacturing tolerance of the entire shell and make the circuit board more stably fixed in the shell.

[0023] In some embodiments, the housing further includes a locking assembly, and the circuit board is detachably fixed in the accommodating cavity via the locking assembly.

[0024] By such arrangement, the gap between the electrical connector on the circuit board and the avoidance hole of the housing is always within the range allowed by the assembly tolerance, so that the housing as a whole has good protection and dustproof performance during use.

[0025] In some embodiments, the locking assembly includes a plurality of locking portions spaced apart along the circumference of the shell, a plurality of connecting portions spaced apart along the circumference of the circuit board, and a plurality of locking members, wherein the connecting portions are detachably connected to the corresponding locking portions through the locking members.

[0026] Such an arrangement keeps the circuit board in a stable state inside the shell and relatively stationary with the shell, so that the gap between the electrical connector on the circuit board and the avoidance hole of the shell is always within the range allowed by the assembly tolerance, so that the shell as a whole has good protective and dustproof performance during use.

[0027] In some embodiments, the housing further comprises a snap assembly, and the cover body is detachably connected to the shell body via the snap assembly.

[0028] Such an arrangement enables the cover body to be detachably fixedly connected to the shell, so that the cover body can stably cover the open side of the shell, reducing the assembly gap between the cover body and the shell, and also making the installation position of the circuit board on the shell more stable.

[0029] In some embodiments, the buckle assembly includes a plurality of bayonet holes arranged at intervals along the circumference of the shell and a plurality of buckles arranged at intervals along the circumference of the cover body, and the buckles are correspondingly engaged with the bayonet holes.

[0030] Such arrangement, on the one hand, enables the cover body and the shell to be stably aligned and connected; on the other hand, reduces the assembly gap between the cover body and the shell, so that the assembly gap between the cover body and the shell meets the requirements of a higher dustproof level.

[0031] In some embodiments, the clearance fit tolerance δ2 between the buckle and the bayonet satisfies: 0mm<δ2≤0.5mm.

[0032] With such a configuration, the assembly gap between the cover body and the outer shell is controlled within a range greater than 0 and less than or equal to 0.5 mm, so that the assembly gap between the cover body and the outer shell effectively meets the IP40 protection level requirement, and the outer shell can effectively prevent the intrusion of solid objects with a diameter of 1 mm, further improving the overall protection and dustproof performance of the outer shell.

[0033] In a second aspect, the present application provides an electrical device, wherein the electrical device comprises the above-mentioned battery device, and the battery device is used to provide electrical energy.

[0034] The electrical equipment according to the second aspect of the present application has at least the following beneficial effects:

[0035] The electrical equipment of the present application is equipped with the above-mentioned battery device, and thus has good use stability and reliability.

[0036] 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

[0037] 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:

[0038] Figure 1 Schematic diagram of the structure of a battery device according to an embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of the structural decomposition of the housing of an embodiment of the present application.

[0040] Figure 3 It is a schematic diagram of the matching structure of the shell and the circuit board of an embodiment of the present application.

[0041] Figure 4 It is a schematic diagram of the structure of the shell of an embodiment of the present application.

[0042] Figure 5 This is a schematic diagram of the matching structure of the housing and the circuit board of an embodiment of the present application from another perspective.

[0043] Figure 6 It is a schematic diagram of the front view structure of the shell of an embodiment of the present application.

[0044] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at AA.

[0045] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure at BB.

[0046] Fig. 9 It is a schematic diagram of the front view structure of the shell of the embodiment of the present application.

[0047] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle.

[0048] Fig.11 for Fig. 9 A partial enlarged view of point D in the middle.

[0049] Fig.12 It is a schematic side view of the structure of the housing of an embodiment of the present application.

[0050] Fig.13 for Fig.12 A partial enlarged view of point E in the middle.

[0051] Fig.14 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of the present application.

[0052] Explanation of the reference numerals: electrical equipment 10; battery device 20; case 21; battery cell 22; motor 30; controller 40; housing 100; accommodating chamber 110; avoidance hole 120; positioning assembly 130; first positioning column 131; second positioning column 132; circuit board 200; electrical connector 210; mating assembly 220; first positioning hole 221; second positioning hole 222; cover 300; locking assembly 400; locking portion 410; connecting portion 420; buckle assembly 500; bayonet 510; buckle 520; vertical portion 521; bending portion 522. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0055] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0059] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices 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 battery devices, the market demand is also constantly expanding.

[0060] The battery device is composed of one or more battery cells. For each battery device, the multiple battery cells that make it up can be connected in series, in parallel, or in mixed connection. Among them, mixed connection means that multiple battery cells are both connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells is accommodated in the box of the battery device. Of course, the battery device can also be a battery cell group in the form of multiple battery cells that are first connected in series, in parallel, or in mixed connection, and multiple groups of battery cells are then connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box of the battery device. The battery device may also include other structures. For example, the battery device may also include an electrical connector for realizing electrical connection between multiple battery cells.

[0061] The battery box includes a battery upper cover and a battery lower box, which together define a cavity for accommodating multiple battery cells or battery cell groups. The battery box formed by the battery upper cover and the battery lower box can be in various shapes, such as a cylinder, a cuboid, etc.

[0062] A battery cell is the smallest unit that makes up a battery. In the structure of a battery cell, it includes a shell structure, an electrolyte, and an electrode assembly. The electrode assembly is the component where electrochemical reactions occur in the battery cell. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The shell structure may include one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.

[0063] In order to intelligently manage and maintain each battery cell in the battery device, monitor the status of the battery device, and extend the service life of the battery device, the battery device is usually equipped with an electronic control component, which can also be understood as a battery management system (BMSBattery Management System). The battery management system is an electronic device composed of battery electronic components and a battery control unit. The battery electronic components are used to collect electrical and thermal data related to battery cells (integrated) or battery modules (integrated) and provide these data to the electronic device of the battery control unit. The battery control unit is used to control or manage the electrical or thermal performance of the battery system and can exchange information with other control units on the power-consuming equipment. Electronic control components. In simple terms, the battery management system consists of a collector and a controller. The collector collects electrical and thermal information related to each battery cell in the battery, and the controller controls or manages the electrical or thermal performance of the battery. The controller is generally set as a circuit board (PCB Printed Circuit Board). During production and manufacturing, a shell is usually set to protect and support the circuit board. At the same time, the shell plays the role of insulation, waterproof and dustproof for the circuit board, so that the circuit board can have a good operating environment during long-term use.

[0064] The housing is usually provided with a shell and a cover structure, which is connected to the shell through the cover, and the cover and the shell together define a housing cavity for installing and accommodating the circuit board. The circuit board is generally provided with a connector socket for connecting to other circuits or electrical equipment on the electronic control component.

[0065] In the related art, in order to allow the connector socket on the circuit board to extend out of the housing so that the connector socket can be connected to other circuits or electrical equipment on the electric control component, a connector socket avoidance hole is provided on the cover of the housing. At the same time, in order to fix the circuit board, a corresponding fixing structure is provided on the shell of the housing. Since both the shell and the cover have structures that match the circuit board, and there are inevitably manufacturing tolerances when the shell and the cover are processed and manufactured, after the cover is covered with the shell, there is a large assembly tolerance between the circuit board and the shell and the cover, which makes it difficult for the assembly gap between the connector socket on the circuit board and the shell to meet the high dustproof grade requirements after the circuit board is assembled in the shell.

[0066] Based on this, in view of the problem that there is a large assembly tolerance between the circuit board and the shell and cover of the shell used for the current electronic control component, which makes it difficult for the assembly gap between the connector socket on the circuit board and the shell to meet the higher dustproof level requirements after the circuit board is assembled in the shell, one or more embodiments of the present application provide a battery device, through the matching arrangement of the shell, circuit board and cover of the shell in the electronic control component, a positioning component and an avoidance hole are arranged on the shell together, and the matching component on the circuit board corresponds to the positioning component on the shell to accurately locate the assembly position of the circuit board on the shell, the relative position of the avoidance hole on the shell and the positioning component remains unchanged, and the matching component on the circuit board corresponds to the positioning component on the shell to constrain the specific position of the electrical connector on the circuit board passing through the avoidance hole on the shell, so that the gap between the electrical connector and the avoidance hole after passing through the avoidance hole is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector on the circuit board and the shell, so that the assembly gap between the electrical connector on the circuit board and the shell effectively meets the higher dustproof level requirements.

[0067] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 An embodiment of the present application provides a battery device 20 , which includes a box body 21 , a battery cell 22 , and an electronic control component. The battery cell 22 and the electronic control component are connected and both installed in the box body 21 .

[0068] The electric control component includes a shell, and the shell includes a housing 100 , a circuit board 200 and a cover 300 .

[0069] The housing 100 is formed with a receiving cavity 110 with one side open, a avoiding hole 120 communicating with the receiving cavity 110 is opened on the housing 100 , and a positioning assembly 130 is provided on the housing 100 .

[0070] The circuit board 200 is provided with an electrical connector 210 and a mating component 220 . The positioning component 130 is positioned and matched with the mating component 220 . The circuit board 200 is fixedly installed in the accommodating cavity 110 . The electrical connector 210 passes through the avoidance hole 120 and is gap-matched with the avoidance hole 120 .

[0071] The cover 300 is disposed at the open side of the accommodating cavity 110 and is butt-jointed with the housing 100 to cover the accommodating cavity 110 .

[0072] It should be noted that, in the present application, the housing 100 may be in the shape of a cube, a cylinder, etc. For example, see Figure 4 The housing 100 is a cubic structure with one side open and the other sides sealed.

[0073] The shape of the accommodating cavity 110 formed by the shell 100 can be adapted to the shape of the circuit board 200 , so that the circuit board 200 can be more compactly fixedly installed in the accommodating cavity 110 formed by the shell 100 , reducing the gap between the circuit board 200 and the shell 100 .

[0074] The avoidance hole 120 on the housing 100 is opened on the bottom surface of the housing 100, and the shape of the avoidance hole 120 can be adapted to the shape of the electrical connector 210 on the circuit board 200. For example, see Figure 2 and Figure 5 The avoidance hole 120 and the electrical connector 210 are in a matching strip shape. Moreover, the avoidance hole 120 is slightly larger than the electrical connector 210 so that the electrical connector 210 can freely pass through the avoidance hole 120 and extend out of the housing 100 .

[0075] The positioning assembly 130 on the shell 100 is also arranged on the bottom surface of the shell 100 so as to be located on the same side of the shell 100 as the avoidance hole 120 , thereby reducing the manufacturing tolerance of the shell 100 caused by the processing and manufacturing of the avoidance hole 120 and the positioning assembly 130 .

[0076] It should also be noted that, in the present application, the electrical connector 210210 on the circuit board 200 can be understood as a connector socket set on the circuit board 200, and the circuit board 200 is connected to other circuits or electrical settings on the electronic control component through the electrical connector 210.

[0077] In the present application, the cover body 300 is adapted to the shape of the open side of the accommodating cavity 110, and the cover body 300 can be docked with the shell 100 by a detachable connection method such as rotational engagement, snap engagement, etc. In this way, the circuit board 200 is covered and sealed in the accommodating cavity 110, and it is also convenient to disassemble and replace the circuit board 200, and to facilitate daily maintenance of the circuit board 200.

[0078] It should be understood that see Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 When the circuit board 200 is assembled into the accommodating cavity 110 of the housing 100, the matching component 220 on the circuit board 200 can be first positioned and matched with the positioning component 130 on the housing 100 to accurately locate the assembly position of the circuit board 200 on the housing 100. Since the relative positions of the avoidance hole 120 on the housing 100 and the positioning component 130 remain unchanged, the positioning and matching of the matching component 220 on the circuit board 200 and the positioning component 130 on the housing 100 constrains the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the housing 100, so that the gap between the electrical connector 210 and the avoidance hole 120 after passing through the avoidance hole 120 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the housing, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the housing effectively meets the requirements of a higher dustproof level.

[0079] In addition, see Figure 4 The housing of the embodiment of the present application is provided with a positioning component 130 for locating the installation position of the circuit board 200 and an avoidance hole 120 for the electrical connector 210 on the circuit board 200 to pass through on the housing 100. The avoidance hole 120 and the positioning component 130 are located on the same housing 100, which can reduce the manufacturing tolerance of the overall housing caused by the processing and manufacturing of the two. It also provides a structural basis for the electrical connector 210 on the circuit board 200 to pass through the avoidance hole 120. The gap between the avoidance hole 120 and the electrical connector 210 on the circuit board 200 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the housing, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the housing effectively meets the higher dustproof level requirements.

[0080] It is not difficult to understand that in the battery device of the embodiment of the present application, the housing 100, the circuit board 200 and the cover 300 of the housing in the electronic control component are matched, and the positioning component 130 and the avoidance hole 120 are set on the housing 100. The matching component 220 on the circuit board 200 corresponds to the positioning component 130 on the housing 100 to accurately position the assembly position of the circuit board 200 on the housing 100. The relative position of the avoidance hole 120 on the housing 100 and the positioning component 130 remains unchanged, and the matching component 220 on the circuit board 200 is fixed to the housing 100. The corresponding positioning cooperation between the component 220 and the positioning component 130 on the shell 100 constrains the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the shell 100, so that the gap between the electrical connector 210 and the avoidance hole 120 after passing through the avoidance hole 120 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the shell, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the shell effectively meets the higher dustproof level requirements.

[0081] In some embodiments of the present application, see Figure 5 , Figure 6 and Figure 7 , the clearance fit tolerance δ1 between the electrical connector 210 and the avoidance hole 120 satisfies: 0mm<δ1≤0.5mm.

[0082] Specifically, see Figure 2 , Figure 4 and Figure 5 The electrical connector 210 is constructed as a rectangular parallelepiped structure, that is, its cross section is square. Correspondingly, the avoidance hole 120 is a square hole. The electrical connector 210 and the avoidance hole 120 are clearance-matched. Figure 6 and Figure 7 Both ends of the electrical connector 210 along its width direction and both ends of the avoidance hole 120 along its width direction form a gap, which corresponds to the clearance fit tolerance δ1 between the electrical connector 210 and the avoidance hole 120, and δ1 is controlled within the range greater than 0 and less than or equal to 0.5 mm.

[0083] With such configuration, the assembly gap between the electrical connector 210 on the circuit board 200 and the housing is controlled to be greater than 0 and less than or equal to 0.5 mm, thereby effectively meeting the IP40 protection grade requirement.

[0084] It should be noted that IP40 is a protection level, which means that the device or structure can prevent the intrusion of solid objects with a diameter greater than 1 mm. Therefore, when the assembly gap between the electrical connector 210 on the circuit board 200 and the housing meets the protection level requirement of IP40, the housing can effectively prevent the intrusion of solid objects with a diameter of 1 mm, and has better protection and dustproof performance.

[0085] It should also be noted that, by reasonably setting the size of the avoidance hole 120 on the shell 100 in advance, the positioning and matching of the mating component 220 on the circuit board 200 and the positioning component 130 on the shell 100 constrains the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the shell 100, that is, the clearance fitting tolerance δ1 between the electrical connector 210 and the avoidance hole 120 can be effectively controlled within the range greater than 0 and less than or equal to 0.5 mm, so that the shell meets the protection level requirement of IP40.

[0086] In some embodiments of the present application, see Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The positioning component 130 includes a first positioning column 131 disposed on the housing 100 , and the matching component 220 includes a first positioning hole 221 opened on the circuit board 200 . The first positioning column 131 is inserted and matched with the first positioning hole 221 .

[0087] Specifically, the first positioning column 131 on the housing 100 is arranged on the bottom surface of the housing 100, so as to be located on the same side of the housing 100 as the avoidance hole 120, and correspondingly reduce the manufacturing tolerance of the housing 100 caused by the processing and manufacturing of the avoidance hole 120 and the first positioning column 131. The first positioning column 131 can be, but not limited to, a cylindrical, square column or other structure. Correspondingly, the first positioning hole 221 on the circuit board 200 can be, but not limited to, a circular hole, a square hole or other shapes.

[0088] It should be understood that when the circuit board 200 is assembled into the accommodating cavity 110 of the housing 100, the first positioning hole 221 on the circuit board 200 and the first positioning column 131 on the housing 100 can be firstly arranged to correspond and cooperate, so as to accurately locate the assembly position of the circuit board 200 on the housing 100. Since the relative position of the avoidance hole 120 on the housing 100 and the first positioning column 131 remains unchanged, the arrangement and cooperation of the first positioning hole 221 on the circuit board 200 and the first positioning column 131 on the housing 100 constrains the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the housing 100, so that the gap between the electrical connector 210 and the avoidance hole 120 after passing through the avoidance hole 120 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the housing, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the housing effectively meets the requirements of a higher dustproof level.

[0089] In addition, see Figure 4 The housing of the embodiment of the present application is provided with a first positioning column 131 for locating the installation position of the circuit board 200 and an avoidance hole 120 for the electrical connector 210 on the circuit board 200 to pass through on the housing 100. The avoidance hole 120 and the first positioning column 131 are located on the same housing 100, which can reduce the manufacturing tolerance of the overall housing caused by the processing and manufacturing of the two. It also provides a structural basis for the electrical connector 210 on the circuit board 200 to pass through the avoidance hole 120. The gap between the avoidance hole 120 and the electrical connector 210 on the circuit board 200 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the housing, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the housing effectively meets the higher dustproof level requirements.

[0090] In some embodiments of the present application, see Figure 3 , Figure 4 and Figure 5 The positioning component 130 also includes a second positioning column 132 disposed on the shell 100, and the second positioning column 132 and the first positioning column 131 are respectively located on adjacent sides of the shell 100. The mating component 220 also includes a second positioning hole 222 opened on the circuit board 200, and the second positioning column 132 is inserted and mated with the second positioning hole 222.

[0091] It should be noted that the second positioning column 132 and the first positioning column 131 are respectively located on adjacent sides of the shell 100 , which can be understood as: the line between the position of the first positioning column 131 and the position of the second positioning column 132 does not coincide with the length direction or width direction of the shell 100 .

[0092] Specifically, the shell 100 is in the shape of a rectangular parallelepiped with an open top surface, the first positioning column 131 is arranged on the bottom surface of the shell 100 and close to the front side surface of the shell 100, and the second positioning column 132 is arranged on the bottom surface of the shell 100 and close to the left side surface of the shell 100. The first positioning column 131 and the second positioning column 132 are both integrally formed with the shell 100, reducing the manufacturing tolerance of the shell 100 caused by the processing and manufacturing of the first positioning column 131 and the second positioning column 132.

[0093] It is not difficult to understand that when the circuit board 200 is assembled into the accommodating cavity 110 of the housing 100, the first positioning hole 221 and the second positioning hole 222 on the circuit board 200 can be respectively matched with the first positioning column 131 and the second positioning column 132 on the housing 100 to accurately locate the assembly position of the circuit board 200 on the housing 100. The assembly position of the circuit board 200 on the housing 100 is positioned by two sets of hole-column matching structures, and the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the housing 100 is accurately constrained, and further the gap between the electrical connector 210 and the avoidance hole 120 after passing through the avoidance hole 120 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the housing, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the housing effectively meets the requirements of a higher dustproof level.

[0094] Moreover, the two groups of hole-column matching structures distributed on the adjacent sides of the shell 100 can also accurately limit the installation of the circuit board 200 in the accommodating cavity 110 of the shell 100, reduce the probability of the circuit board 200 moving along the length direction or width direction of the shell 100, and keep the installation position of the circuit board 200 in the accommodating cavity 110 of the shell 100 stable, so that the gap between the electrical connector 210 on the circuit board 200 and the avoidance hole 120 of the shell 100 is always within the range allowed by the assembly tolerance, so that the overall shell has good protective and dustproof performance during use.

[0095] Further, see Figure 3 The projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the length direction of the shell 100 is greater than half the length of the shell 100 .

[0096] It is easy to understand that the length direction of the shell 100 is a straight line. On the shell 100, since the first positioning column 131 and the second positioning column 132 are distributed on the adjacent two sides of the shell 100, the line between the position of the first positioning column 131 and the position of the second positioning column 132 is inclined relative to the length direction of the shell 100.

[0097] For example, see Figure 3 , L0 is defined as the length of the line between the position of the first positioning column 131 and the position of the second positioning column 132, L1 is defined as the projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the length direction of the shell 100, S1 is defined as the length of the shell 100, and α is defined as the inclination angle of the line between the position of the first positioning column 131 and the position of the second positioning column 132 relative to the length direction of the shell 100.

[0098] Thus, the projection length of the line between the first positioning post 131 and the second positioning post 132 in the length direction of the housing 100 is greater than half the length of the housing 100 , which can be expressed as: (S1 / 2)<L1=L0*(cosα).

[0099] By accurately setting the distribution positions of the first positioning column 131 and the second positioning column 132 in the shell 100, the projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the length direction of the shell 100 is greater than half of the length of the shell 100. The two sets of hole-column matching structures formed by the first positioning column 131 and the first positioning hole 221 and the second positioning column 132 and the second positioning hole 222 can be positioned at more than half of the structural area of ​​the circuit board 200, thereby improving the positioning accuracy of the assembly position of the circuit board 200 on the shell 100.

[0100] At the same time, compared with the use of a circumferential four-group hole-column matching structure to position the circuit board 200, the number of positioning columns on the shell 100 and the number of positioning holes on the circuit board 200 can be reduced accordingly, thereby reducing the manufacturing tolerances of the shell 100 and the circuit board 200 caused by the processing and manufacturing of the positioning columns and the positioning holes, reducing the overall manufacturing tolerances of the shell, and further improving the overall protective dustproof performance of the shell.

[0101] Similarly, in some embodiments of the present application, see Figure 3 The projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the width direction of the housing 100 is greater than half of the width of the housing 100 .

[0102] For example, see Figure 3, L0 is defined as the length of the line between the position of the first positioning column 131 and the position of the second positioning column 132, L2 is defined as the projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the width direction of the shell 100, S2 is defined as the width of the shell 100, and α is defined as the inclination angle of the line between the position of the first positioning column 131 and the position of the second positioning column 132 relative to the length direction of the shell 100.

[0103] Thus, the projection length of the line between the first positioning post 131 and the second positioning post 132 in the length direction of the housing 100 is greater than half the length of the housing 100 , which can be expressed as: (S2 / 2)<L2=L0*(sinα).

[0104] Similarly, by accurately setting the distribution positions of the first positioning column 131 and the second positioning column 132 in the shell 100, the projection length of the line between the position of the first positioning column 131 and the position of the second positioning column 132 in the width direction of the shell 100 is greater than half of the width of the shell 100. The two sets of hole-column matching structures formed by the first positioning column 131 and the first positioning hole 221 and the second positioning column 132 and the second positioning hole 222 can be positioned at more than half of the structural area of ​​the circuit board 200, thereby improving the positioning accuracy of the assembly position of the circuit board 200 on the shell 100.

[0105] Compared with the use of a circumferential four-group hole-column matching structure to position the circuit board 200, the number of positioning columns on the shell 100 and the number of positioning holes on the circuit board 200 can be reduced accordingly, thereby reducing the manufacturing tolerances of the shell 100 and the circuit board 200 caused by the processing and manufacturing of the positioning columns and the positioning holes, reducing the overall manufacturing tolerance of the shell, and further improving the overall protective dustproof performance of the shell.

[0106] Further, see Fig. 9 and Fig.10 , the outer diameter Φ1 of the first positioning column 131 satisfies: 3.9 mm≤Φ1≤4.1 mm.

[0107] Specifically, the first positioning column 131 may be, but is not limited to, a round shaft, a square shaft, etc. The theoretical manufacturing value of the outer diameter Φ1 of the first positioning column 131 is 4.0 mm, and the manufacturing tolerance is plus or minus 0.1 mm.

[0108] Likewise, the outer diameter Φ2 of the second positioning column 132 satisfies: 3.9 mm≤Φ2≤4.1 mm.

[0109] Specifically, the second positioning column 132 may be, but is not limited to, a round shaft, a square shaft, etc. The theoretical manufacturing value of the outer diameter Φ2 of the second positioning column 132 is 4.0 mm, and the manufacturing tolerance is plus or minus 0.1 mm.

[0110] It should be noted that by controlling the manufacturing tolerance of the outer diameter Φ1 of the first positioning column 131 and / or the outer diameter Φ2 of the second positioning column 132 within the range of plus or minus 0.1 mm, the overall manufacturing tolerance of the shell 100 can be reduced accordingly, so that the circuit board 200 can be fixed more stably in the shell.

[0111] In some embodiments of the present application, see Figure 3 and Figure 4 The housing further includes a locking assembly 400 , through which the circuit board 200 is detachably fixed in the accommodating cavity 110 .

[0112] Specifically, there may be a plurality of locking assemblies 400 , and the plurality of locking assemblies 400 are distributed at intervals at the circumferential edge of the housing 100 or the circumferential edge of the circuit board 200 .

[0113] The circuit board 200 is detachably fixed in the accommodating cavity 110 of the housing 100 by the locking assembly 400, so that the circuit board 200 can be kept in a stable state in the housing 100 and relatively static with the housing 100, and the circuit board 200 will not move along the height direction of the housing 100. In this way, the gap between the electrical connector 210 on the circuit board 200 and the avoidance hole 120 of the housing 100 is always within the range allowed by the assembly tolerance, so that the housing as a whole has good protection and dustproof performance during use.

[0114] Further, see Figure 3 and Figure 4 The locking assembly 400 includes a plurality of locking portions 410 spaced apart along the circumference of the housing 100, a plurality of connecting portions 420 spaced apart along the circumference of the circuit board 200, and a plurality of locking members (not shown in the figure), wherein the connecting portions 420 are detachably connected to the locking portions 410 via the locking members.

[0115] Specifically, the plurality of locking portions 410 are distributed at intervals along the circumferential edge of the bottom of the housing 100 , and correspondingly, the plurality of connecting portions 420 are distributed at intervals along the circumferential edge of the circuit board 200 .

[0116] The locking portion 410 is constructed as a hollow column integrally formed with the housing 100, and the inner wall of the hollow column is provided with an internal thread. The connecting portion 420 is constructed as a connecting hole opened on the circuit board 200, and the locking member is constructed as a bolt or a screw.

[0117] It should be understood that the upper end surface of the hollow column forms a positioning surface aligned with the connecting hole. When the first positioning hole 221 on the circuit board 200 is penetrated and matched with the first positioning column 131 on the housing 100, the connecting portion 420 on the circuit board 200 is aligned with the locking portion 410 on the housing 100, and then the circuit board 200 is locked and fixed on the housing 100 by passing the locking member through the connecting portion 420 and being threadedly connected with the locking portion 410, so that the circuit board 200 remains in a stable state in the housing 100 and remains relatively static with the housing 100, so that the gap between the electrical connector 210 on the circuit board 200 and the avoidance hole 120 of the housing 100 is always within the range allowed by the assembly tolerance, so that the housing as a whole has good protection and dustproof performance during use.

[0118] In some embodiments of the present application, see Figure 2 , Figure 4 , Figure 6 and Figure 8 The housing further includes a snap assembly 500 , and the cover 300 is detachably connected to the housing 100 via the snap assembly 500 .

[0119] Specifically, there may be a plurality of snap-fit ​​assemblies 500 , and the plurality of snap-fit ​​assemblies 500 are distributed at intervals at the circumferential edge of the cover body 300 or the circumferential edge of the housing 100 .

[0120] By setting the snap assembly 500, the cover body 300 and the shell 100 are detachably fixedly connected, so that the cover body 300 can be stably covered on the open side of the shell 100, reducing the assembly gap between the cover body 300 and the shell 100, and also making the installation position of the circuit board 200 on the shell 100 more stable.

[0121] Further, see Figure 2 , Figure 4 , Figure 6 and Figure 8 The buckle assembly 500 includes a plurality of bayonet holes 510 spaced apart along the circumference of the housing 100 and a plurality of buckles 520 spaced apart along the circumference of the cover 300 . The buckles 520 are locked and matched with the bayonet holes 510 .

[0122] Specifically, a plurality of bayonet holes 510 are spaced apart along the circumferential side wall of the housing 100, and the shape of the bayonet holes 510 matches the shape of the buckle 520. The circumferential edge of the cover 300 facing the housing 100 is formed with an edge, and the buckle 520 is disposed on the edge and is integrally formed with the edge, thereby reducing the manufacturing tolerance of the cover 300.

[0123] It should be noted that the buckle 520 can be made of a plastic material with elastic deformation properties, so that the buckle 520 can be deformed when subjected to force. In the process of aligning the cover 300 with the housing 100, the buckle 520 on the cover 300 can be aligned with the bayonet 510, and then a certain external force is applied to the cover 300 to elastically buckle the buckle 520 into the bayonet 510, so that the buckle 520 and the bayonet 510 form a locking fit.

[0124] By means of the one-to-one corresponding engagement of multiple buckles 520 on the circumference of the cover body 300 and multiple bayonet holes 510 on the circumference of the shell 100, on the one hand, the cover body 300 and the shell 100 are stably aligned and connected; on the other hand, the assembly gap between the cover body 300 and the shell 100 is reduced, so that the assembly gap between the cover body 300 and the shell 100 meets the higher dustproof level requirements.

[0125] Further, see Figure 6 and Figure 8 , the clearance fit tolerance δ2 between the buckle 520 and the bayonet 510 satisfies: 0mm<δ2≤0.5mm.

[0126] Specifically, see Figure 2 , Figure 6 and Figure 8 The buckle 520 includes an integrally formed vertical portion 521 and a bent portion 522 , and the bent portion 522 is bent toward the outside of the cover body 300 relative to the vertical portion 521 so that the bent portion 522 can be locked and matched with the bayonet 510 on the shell 100 .

[0127] At the same time, in order to facilitate the positioning and assembly of the bent portion 522 on the buckle 520 onto the bayonet 510, the width of the bayonet 510 is greater than the width of the bent portion 522, thereby reducing the structural interference between the bent portion 522 and the housing 100 when the bent portion 522 is inserted into the bayonet 510. In addition, in order to facilitate the detachment of the buckle 520 from the bayonet 510, one side of the bent portion 522 is configured as an inclined surface, so that the buckle 520 as a whole can be slid out of the bayonet 510.

[0128] Understandably, see Figure 8 When the bent portion 522 on the buckle 520 enters into the bayonet 510 and forms a locking fit with the bayonet 510 in the up and down directions, gaps are formed between the two ends of the bent portion 522 along the width direction and the two ends of the bayonet 510 along its width direction. The gap corresponds to the clearance fit tolerance δ2 between the buckle 520 and the bayonet 510, and δ2 is controlled within a range greater than 0 and less than or equal to 0.5 mm.

[0129] In this way, the assembly gap between the cover body 300 and the outer shell is controlled to be greater than 0 and less than or equal to 0.5 mm, so that the assembly gap between the cover body 300 and the outer shell effectively meets the IP40 protection level requirement, and the outer shell can effectively prevent the intrusion of solid objects with a diameter of 1 mm, further improving the overall protection and dustproof performance of the outer shell.

[0130] See also Figure 1 and Fig.14 The embodiment of the present application further provides an electric device 10, which includes the above-mentioned battery device 20, and the battery device 20 is used to provide electric energy.

[0131] Specifically, the battery device 20 can be used in an electric device 10 that uses a battery as a power source, or various energy storage systems that use a battery as an energy storage element. The electric device 10 can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc. The housing for the electric control component can be integrated in the box 21 of the battery device 20.

[0132] See also Fig.14 , the electric device 10 is a vehicle as an example for explanation, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the battery device 20 can be set at the bottom, head or tail of the vehicle. The battery device 20 can be used to power the vehicle, for example, the battery device 20 is used as an operating power source for the vehicle. The vehicle can also include a controller 40 and a motor 30, and the controller 40 is used to control the battery 20 to power the motor 30, for example, for the starting, navigation and working power requirements of the vehicle during driving.

[0133] The battery device 20 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0134] In the present application, the battery device 20 refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery device 20 mentioned in the present application may include a battery module or a battery pack. The battery device 20 may also include a box 21 for encapsulating one or more battery cells 22 or multiple battery modules. The box 21 can effectively prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 22.

[0135] It is not difficult to understand that the electrical equipment of the embodiment of the present application has good stability and reliability in use because it is equipped with the above-mentioned battery device 20.

[0136] See also Figures 1 to 14 The embodiment of the present application provides a battery device 20 and an electric device 10. The electric device includes the battery device, and the battery device is used to provide electric energy.

[0137] The battery device 20 includes: a box body 21; a battery cell 22 and an electronic control component, the battery cell 22 and the electronic control component are connected and both are installed in the box body 21; wherein the electronic control component includes a shell, the shell includes: a shell 100, which is formed with a accommodating cavity 110 with one side open, the shell 100 is provided with an avoidance hole 120 connected to the accommodating cavity 110, and the shell 100 is provided with a positioning component 130; a circuit board 200, which is provided with an electrical connector 210 and a matching component 220, the positioning component 130 is positioned and matched with the matching component 220, the circuit board 200 is fixedly installed in the accommodating cavity 110, the electrical connector 210 passes through the avoidance hole 120 and is gap-matched with the avoidance hole 120; a cover body 300, which is provided on the open side of the accommodating cavity 110 and is connected to the shell 100 to cover the accommodating cavity 110.

[0138] The battery device 20 of the embodiment of the present application is provided with a housing 100, a circuit board 200 and a cover 300 of the housing in the electric control component. A positioning component 130 and an avoidance hole 120 are provided on the housing 100. The matching component 220 on the circuit board 200 and the positioning component 130 on the housing 100 are correspondingly positioned and matched to accurately position the assembly position of the circuit board 200 on the housing 100. The relative position of the avoidance hole 120 on the housing 100 and the positioning component 130 remains unchanged, and the matching component 220 on the circuit board 200 and the positioning component 130 on the housing 100 remain unchanged. The corresponding positioning cooperation between 20 and the positioning assembly 130 on the shell 100 constrains the specific position of the electrical connector 210 on the circuit board 200 passing through the avoidance hole 120 on the shell 100, so that the gap between the electrical connector 210 and the avoidance hole 120 after passing through the avoidance hole 120 is within the range allowed by the assembly tolerance, thereby reducing the assembly gap between the electrical connector 210 on the circuit board 200 and the shell, so that the assembly gap between the electrical connector 210 on the circuit board 200 and the shell effectively meets the higher dustproof level requirements.

[0139] The electric device 10 of the embodiment of the present application is equipped with the above-mentioned battery device 20 and thus has good stability and reliability in use.

[0140] 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.

[0141] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: include: Box; A battery cell and an electronic control component, wherein the battery cell and the electronic control component are connected and installed in the box; Wherein, the electronic control component comprises a housing, and the housing comprises: A shell is formed with a receiving cavity with one side open, a avoidance hole communicating with the receiving cavity is opened on the shell, and a positioning assembly is provided on the shell; A circuit board is provided with an electrical connector and a matching component, the positioning component is positioned and matched with the matching component, the circuit board is fixedly installed in the accommodating cavity, the electrical connector passes through the avoidance hole and is gap matched with the avoidance hole; The cover body is arranged on the open side of the accommodating cavity and is butt-jointed with the shell body to cover the accommodating cavity.

2. The battery device according to claim 1, characterized in that: The clearance fit tolerance δ1 between the electrical connector and the avoidance hole satisfies: 0mm<δ1≤0.5mm.

3. The battery device according to claim 1, characterized in that: The positioning component includes a first positioning column arranged on the housing, and the matching component includes a first positioning hole opened on the circuit board, and the first positioning column is inserted and matched with the first positioning hole.

4. The battery device according to claim 3, characterized in that: The positioning component also includes a second positioning column arranged on the shell, the second positioning column and the first positioning column are respectively located on adjacent sides of the shell, and the mating component also includes a second positioning hole opened on the circuit board, and the second positioning column is inserted and mated with the second positioning hole.

5. The battery device according to claim 4, characterized in that: The projection length of a line between the position of the first positioning post and the position of the second positioning post in the length direction of the shell is greater than half of the length of the shell; And / or, a projection length of a line between a position of the first positioning post and a position of the second positioning post in a width direction of the shell is greater than half of a width of the shell.

6. The battery device according to claim 4, characterized in that: The outer diameter Φ1 of the first positioning column satisfies: 3.9 mm ≤ Φ1 ≤ 4.1 mm; And / or, the outer diameter Φ2 of the second positioning column satisfies: 3.9mm≤Φ2≤4.1mm.

7. The battery device according to claim 1, characterized in that: The housing further comprises a locking assembly, and the circuit board is detachably fixed in the accommodating cavity through the locking assembly.

8. The battery device according to claim 7, characterized in that: The locking assembly comprises a plurality of locking portions spaced apart along the circumference of the housing, a plurality of connecting portions spaced apart along the circumference of the circuit board, and a plurality of locking members, wherein the connecting portions are detachably connected to the locking portions via the locking members.

9. The battery device according to claim 1, characterized in that: The housing further comprises a buckle assembly, and the cover body is detachably connected to the shell body via the buckle assembly.

10. The battery device according to claim 9, characterized in that: The buckle assembly comprises a plurality of bayonet openings spaced apart along the circumference of the shell and a plurality of buckles spaced apart along the circumference of the cover body, and the buckles are correspondingly engaged with the bayonet openings.

11. The battery device according to claim 10, characterized in that: The clearance fit tolerance δ2 between the buckle and the bayonet satisfies: 0mm<δ2≤0.5mm.

12. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 11, wherein the battery device is used to provide electrical energy.

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