Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body, a battery monitoring unit and a battery monomer are arranged in the box body, the battery monitoring unit comprises a first shell, a printed circuit board and a fastener, the first shell is provided with a shell opening facing a first direction, and the first shell is provided with a second shell opening facing a second direction; the local area of the bottom wall of the first shell is sunken inwards, so that a mounting bulge is formed on the inner side of the first shell, a receding groove is formed in the outer side of the first shell, and an assembly hole penetrating to the receding groove is formed in the top of the mounting bulge; the printed circuit board is located in the first shell, the printed circuit board abuts against the installation protrusion, and a via hole corresponding to the assembly hole is formed in the printed circuit board; the fastener penetrates through the assembly hole and the via hole and is connected with the printed circuit board and the installation protrusion. According to the technical scheme provided by the invention, the mounting bulge is formed by inwards recessing the local area of the bottom wall of the first shell, and can be directly demolded and formed in the first direction by utilizing a mold, so that the forming difficulty is relatively low.

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] The battery monitoring unit (Cell Supervision Circuit, referred to as "battery CSC") is a battery control system installed in the battery box. It is used to monitor the battery status information such as the voltage and temperature of the battery cells, and transmit the battery status information to the battery management system (Battery Management System, referred to as "BMS") for processing.

[0003] In the related art, a battery monitoring unit includes a shell and a printed circuit board. A riveting platform is provided in the shell. The printed circuit board is connected to the riveting platform by rivets to be fixed. However, the molding process of the riveting platform is relatively complicated. Utility Model Content

[0004] The main purpose of the present application is to propose a battery device and an electrical equipment, aiming to improve the problem of a relatively complicated forming process of a riveted platform in a shell of a current battery monitoring unit.

[0005] In a first aspect, the battery device proposed in the present application includes a box body, in which a battery monitoring unit and a battery cell are arranged, and the battery monitoring unit includes:

[0006] A first shell having a shell opening arranged toward a first direction, a local area of ​​a bottom wall of the first shell being recessed inwardly to form a mounting protrusion on the inner side of the first shell and a clearance groove on the outer side of the first shell, and a mounting hole penetrating to the clearance groove being formed at the top of the mounting protrusion;

[0007] a printed circuit board, which is in the first housing and electrically connected to the battery cell, the printed circuit board abuts against the mounting protrusion and is formed with a through hole corresponding to the assembly hole; and

[0008] A fastener is inserted through the assembly hole and the through hole, one end of the fastener abuts against the groove wall of the recess, and the other end presses the end surface of the printed circuit board away from the mounting protrusion.

[0009] In the technical solution provided by the present application, a partial area of the bottom wall of the first housing is recessed inward, so that an installation protrusion is presented on the inner side of the first housing and a relief groove is presented on the outer side of the first housing. An assembly hole penetrating through to the relief groove is formed at the top of the installation protrusion. A via hole is formed at the position where the printed circuit board abuts against the installation protrusion. A fastener passes through the assembly hole and the via hole. The existence of the relief groove provides a relief space for the end of the fastener, so that the outer end of the fastener can abut against the groove wall of the relief groove. The protruding characteristic of the installation protrusion raises the printed circuit board relative to the bottom wall of the first housing, and the electronic components arranged thereon can obtain sufficient installation space. Moreover, since the installation protrusion is formed by the inward depression of a partial area of the bottom wall of the first housing, there are many processing methods available for this structure. For example, when forming the installation protrusion by means of injection molding and demolding, only conventional demolding needs to be carried out on both the inner and outer sides of the first housing respectively. Compared with the inclined ejector pin demolding method for the traditional side-opening riveting platform, a simpler demolding method can be adopted in this solution to form an installation protrusion that meets the fastening requirements.

[0010] In an embodiment, a blocking portion is arranged in the relief groove, and the blocking portion is used to block the assembly hole.

[0011] In the above technical solution, after the fastener passes through the assembly hole and tightly connects the printed circuit board to the installation protrusion, the setting of the blocking portion can block the assembly hole, thereby improving the sealing and protection level of the first housing.

[0012] In an embodiment, the blocking portion includes a sealant.

[0013] In the above technical solution, using the sealant to block the assembly hole in the relief groove will cure after a period of time to achieve a state of stably connecting the first housing. Its operation process is relatively simple and the sealing reliability is relatively high.

[0014] In an embodiment, the fastener includes:

[0015] A limiting portion that presses the printed circuit board towards the installation protrusion;

[0016] A rod portion connected to the limiting portion and passing through the assembly hole and the via hole along the first direction; and,

[0017] A plurality of elastic protrusions distributed in the first direction on the rod portion and extending laterally along the rod portion. The elastic protrusions are configured to be elastically telescopic in the lateral direction. One of the elastic protrusions extends and abuts against the groove wall of the relief groove in the relief groove.

[0018] In the above technical solution, the rod of the fastener is inserted into the assembly hole and the through hole, and at least one of the multiple elastic protrusions formed on its side wall can pass through the outside of the first shell along with the rod, so as to elastically expand in the clearance groove to abut against the groove wall of the clearance groove. With the cooperation of the limiting part, it can achieve the effect of quickly fastening the connection between the printed circuit board and the mounting protrusion.

[0019] In one embodiment, an elastic sealing portion is provided between the printed circuit board and the mounting protrusion.

[0020] In the above technical solution, by providing an elastic sealing portion between the printed circuit board and the mounting protrusion, it can not only seal the connection interface between the printed circuit board and the mounting protrusion, but also provide a certain degree of installation allowable error for the fastener through its own elastic deformation.

[0021] In one embodiment, the battery monitoring unit further includes a second shell, and the second shell covers the shell opening of the first shell.

[0022] In the above technical solution, by covering the shell opening of the first shell with the second shell, a relatively sealed environment can be formed between the two shells, thereby ensuring the sealing protection level of the second shell and the first shell against the printed circuit board.

[0023] In one embodiment, at least one of the fastener, the first shell, and the second shell is made of an insulating material.

[0024] In the above technical solution, at least one of the fastener, the first shell, and the second shell is made of insulating material, which can reduce the generation of suspended metal fragments during the fastening and installation of the fastener, thereby reducing the situation where the battery monitoring unit is affected by the presence of suspended metal fragments and passes the voltage test.

[0025] In one embodiment, the second housing is formed with a connecting portion corresponding to the mounting protrusion, the connecting portion abuts against a side of the printed circuit board away from the mounting protrusion, and is formed with a connecting hole communicating with the via hole;

[0026] One end of the fastener extends out of the connection hole and abuts against the connection portion toward the printed circuit board.

[0027] In the above technical solution, the second shell is abutted against the printed circuit board through its connecting part, and the fastener can directly fasten the second shell, the printed circuit board and the first shell into one body through the connecting hole of the connecting part, eliminating the need to set up a separate connecting structure for the second shell and the first shell, reducing production costs, and improving the assembly efficiency of the battery monitoring unit.

[0028] In one embodiment, the fastener, the connecting portion, and the mounting protrusion form a fastening group in one-to-one correspondence, and a plurality of the fastening groups are arranged corresponding to the periphery of the printed circuit board.

[0029] In the above technical solution, arranging a plurality of fastening groups along the periphery of the printed circuit board can improve the installation stability among the printed circuit board, the first housing, and the second housing.

[0030] In a second aspect, the present application further provides an electrical device, and the electrical device includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0032] Figure 1 FIG. 15 is a schematic structural diagram of an embodiment of the electrical device provided by the present application for a vehicle;

[0033] Figure 2 FIG. 19 is an exploded structural schematic diagram of an embodiment of the battery device provided by the present application;

[0034] Figure 3 FIG. 23 is a structural schematic diagram of a battery monitoring unit in the battery device provided by the present application;

[0035] Figure 4 For Figure 3 FIG. 29 is a top view structural schematic diagram of the battery monitoring unit in FIG.

[0036] Figure 5 For Figure 4 FIG. 35 is a structural schematic diagram of the cross-section A-A in FIG.

[0037] Figure 6 For Figure 3 FIG. 41 is a structural schematic diagram of the first housing in FIG.

[0038] Figure 7 For Figure 3 FIG. 47 is a bottom view structural schematic diagram of the battery monitoring unit in FIG.

[0039] Explanation of the reference numerals in the drawings:

[0040] 1000, vehicle;

[0041] 100, battery device; 200, controller; 300, motor;

[0042] 1. Box body; 1a. Installation cavity; 11. Box main body; 12. Box cover; 2. Battery cell; 3. Battery monitoring unit; 31. First housing; 31a. Installation protrusion; 31b. Relief groove; 311. Assembly hole; 32. Second housing; 321. Connection part; 3211. Connection hole; 33. Printed circuit board; 331. Via hole; 4. Fastener; 41. Rod part; 411. Elastic protrusion; 42. Limiting part; 5. Elastic sealing part; X. First direction.

[0043] The realization of the purpose of this application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0044] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of this application more clearly, so they are only examples and cannot be used to limit the protection scope of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0047] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "a plurality of" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0049] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application 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. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0051] The electrical equipment provided by the present application includes a battery device and uses the battery device as a power source. The electrical equipment includes, but is not limited to, new energy vehicles such as pure electric vehicles, hybrid vehicles, and range-extended electric vehicles, as well as engineering vehicles such as electric excavators and electric bulldozers, and can also include aircraft such as electric drones and electric passenger aircraft.

[0052] For the convenience of description in the following embodiments, a vehicle as an electrical equipment in an embodiment of the present application is taken as an example for description.

[0053] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of an embodiment of a vehicle 1000 as the electrical equipment provided by the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0054] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0055] In the battery device, the battery supervision unit (Cell Supervision Circuit, abbreviated as "battery CSC") is a control system for the battery, installed in the battery box, and is used to monitor battery state information such as the voltage and temperature of battery cells, and transmit the battery state information to the battery management system (Battery Management System, abbreviated as "BMS") for processing.

[0056] In the related art, the battery supervision unit includes a housing and a printed circuit board. In order to improve the installation efficiency of the printed circuit board, at present, the printed circuit board is mostly fixed to the inside of the housing by riveting. Therefore, a riveting platform needs to be processed in the housing. The riveting platform is generally spaced from the bottom wall of the housing. The formed interval is mainly to provide a deformation space for the rivet after it passes through the riveting platform, so that the rivet abuts against the back of the riveting platform. At present, the housing of the battery supervision unit is mainly formed by injection molding. Due to the existence of the riveting platform, it is obviously not feasible to use the conventional demolding method. For the structure with a lateral opening between the riveting platform and the bottom wall, usually, the inclined top demolding method needs to be used to realize the demolding of the injection mold. However, the inclined top demolding method is undoubtedly more complex than the conventional demolding method and is also more difficult to operate, which leads to the problem that the forming process of the riveting platform in the housing of the current battery supervision unit is relatively complex.

[0057] Analysis of the above problems reveals that the reason why the riveting platform is spaced from the bottom wall of the housing is mainly to reserve a deformation space for the rivet. Therefore, it can be considered to make the riveting space reserved by the riveting platform penetrate downward through the bottom wall of the housing, so that the riveting platform can be formed by a simple up-and-down demolding method.

[0058] Based on this, the present application provides a battery device. The battery device includes a battery supervision unit. The first housing of the battery supervision unit is formed with an installation protrusion on the inner side of the first housing by a locally concave manner. The installation protrusion can be used for the printed circuit board to be firmly connected. At the same time, there is no lateral opening in the installation protrusion, and it can be formed by a simple up-and-down demolding method. The battery device can at least improve the problem that the forming process of the riveting platform in the housing of the current battery supervision unit is relatively complex.

[0059] For ease of understanding the battery device provided by the present application, please refer to Figure 2 , Figure 2Schematic exploded view of an embodiment of the battery device 100 provided by the present application. The battery device 100 generally includes a box body 1 and battery cells 2. An installation cavity 1a is formed inside the box body 1, and the battery cells 2 are loaded through the installation cavity 1a. The basic structure of the box body 1 generally includes a box main body 11 and a box cover 12. The box cover 12 is arranged on the box main body 11 and jointly defines the installation cavity 1a with the box main body 11. Generally speaking, the battery cells 2 are generally arranged in the box main body 11. After the battery device 100 is mounted on a vehicle, the box cover 12 is generally close to the vehicle, and the box main body 11 is generally away from the vehicle; the installation cavity 1a can be mainly formed in the box main body 11. At this time, the box main body 11 can be understood as a basin-like structure, and the box cover 12 is covered on the box main body 11 to cover the installation cavity 1a; the installation cavity 1a can also be mainly formed in the box cover 12. At this time, the box cover 12 can be understood as a cover-like structure, and the box cover 12 is covered on the box main body 11 to cover the battery cells 2 carried on the box main body 11 into the box cover 12. Of course, the structure of the box body 1 is not limited to this, and this embodiment does not limit it. The material of the box body 1 is usually a metal material, such as an aluminum alloy material. However, in some practical scenarios with high requirements for lightweight, the material of the box body 1 can also be a composite material, such as a carbon fiber material.

[0060] The number of battery cells 2 in the box body 1 can be one or multiple. Among them, when multiple battery cells 2 are provided, the multiple battery cells 2 can be connected in series, parallel or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 2. The multiple battery cells 2 can be directly connected in series, parallel or in a mixed connection to form a battery unit. Of course, the multiple battery cells 2 can also be in the form that the battery cells 2 are first connected in series, parallel or in a mixed connection to form battery modules, and then the multiple battery modules are connected in series, parallel or in a mixed connection to form a battery unit. The battery device 100 can also include other structures, such as a busbar component, for realizing the electrical connection between multiple battery cells 2 or multiple battery modules. Among them, each battery cell 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 2 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0061] To facilitate the understanding of the battery monitoring unit in the battery device provided by the present application, the following is described with reference to the accompanying drawings. Among them, Figure 3 Schematic structural diagram of the battery monitoring unit in the battery device provided by the present application; Figure 4 For Figure 3 Top view structural diagram of the battery monitoring unit in Figure 5 For Figure 4 Schematic structural diagram of the cross-section A-A in Figure 6 For Figure 3 Schematic structural diagram of the first housing in Figure 7 For Figure 3Schematic bottom view structure diagram of the middle battery monitoring unit.

[0062] Please refer to Figure 2 , Figure 5 and Figure 6 , in an embodiment, the battery device 100 includes a box body 1, a battery monitoring unit 3 and battery cells 2 are arranged in the box body 1. The battery monitoring unit 3 includes a first housing 31, a printed circuit board 33 and a fastener 4. The first housing 31 has a housing opening facing the first direction X. A partial area of the bottom wall of the first housing 31 is recessed inward, so as to form a mounting protrusion 31a on the inner side of the first housing 31 and a relief groove 31b on the outer side of the first housing. An assembly hole 311 is formed at the top of the mounting protrusion 31a and penetrates through to the relief groove 31b; the printed circuit board 33 is located inside the first housing 31 and is electrically connected to the battery cells 2. The printed circuit board 33 abuts against the mounting protrusion 31a and is formed with a via hole 331 corresponding to the assembly hole 311; the fastener 4 passes through the assembly hole 311 and the via hole 331. One end of the fastener 4 abuts against the groove wall of the relief groove 31b, and the other end presses the end face of the printed circuit board 33 away from the mounting protrusion 31a.

[0063] The "first housing 31" has a housing opening facing the first direction X. The "bottom wall of the first housing 31" is relative to the housing opening, that is, the bottom wall of the first housing 31 corresponds to its housing opening in the first direction X; generally speaking, a housing has an inside and an outside, and its inner side is the side where the enclosed cavity is located. Based on this, a partial area of the bottom wall of the first housing 31 is recessed inward (the recess of this partial area is relative to its surrounding area), that is, the partial area is recessed towards the opening of the first housing 31, so as to present a relief groove 31b as shown in Figure 7 on the outer side of the first housing 31, and correspondingly present a mounting protrusion 31a as shown in Figure 6 on the inner side of the first housing 31. Generally speaking, the cross-section of the relief groove 31b in the first direction X should gradually narrow towards the inner side of the first housing 31. As shown in Figure 5 , the groove side wall of the relief groove 31b should have a certain slope to facilitate demolding when the relief groove 31b is formed by injection molding; the "top of the mounting protrusion 31a" is the position on the mounting protrusion 31a closest to the housing opening, and its main function is to support the printed circuit board 33. An outwardly penetrating assembly hole 311 is formed at the top. Since the side where the relief groove 31b is located is the outer side, the assembly hole 311 actually penetrates to the inner wall of the relief groove 31b. Due to the existence of the relief groove 31b, after the fastener 4 passes through the assembly hole 311 of the mounting protrusion 31a, its corresponding outer end has enough space to abut against the groove wall of the relief groove 31b, so that the mounting protrusion 31a can play the same role as the riveting platform inside the housing of the traditional battery monitoring unit 3.

[0064] "Printed circuit board 33" belongs to the main functional components of the battery monitoring unit 3. The printed circuit board 33 mainly includes a board body and a component printed circuit. The component printed circuit is electrically connected to the battery cells 2 in the box body 1, so as to obtain battery state information such as the voltage and temperature of the battery cells 2, and transmit the battery state information to the battery management system. There are various possibilities for the printed layout of the component printed circuit on the board body, but usually connection positions are reserved on the board body. The printed circuit board 33 in the embodiment of the present application is formed with a via hole 331, and the via hole 331 is formed at the connection position. The via hole 331 also has different structural forms according to its different setting positions. For example, when the via hole 331 is at the middle position of the printed circuit board 33, it is usually a conventional through hole, but when the via hole 331 is at the edge of the printed circuit board 33, it usually presents as a through slot.

[0065] "Fastener 4" usually has opposite ends. After the fastener 4 passes through the assembly hole 311 and the via hole 331, the opposite ends are respectively located inside and outside the first housing 31 (that is, in the relief groove 31b). The outer end of the fastener 4 abuts against the groove wall of the relief groove 31b, and the inner end of the fastener 4 presses on the end face of the printed circuit board 33 facing away from the mounting protrusion 31a, so as to achieve the purpose of fixing the printed circuit board 33 on the mounting protrusion 31a. Among them, the inner end of the fastener 4 pressing the printed circuit board 33 can be understood as applying a pressing force towards the printed circuit board 33, which can be directly applied to the printed circuit board 33, or indirectly applied to the printed circuit board 33 through other structures; the specific structural form of the fastener 4 can be a bolt fastener or a riveting fastener. Among them, the bolt fastener can include a bolt and a nut. The screw of the bolt passes through the via hole 331 and the assembly hole 311 from the inside of the first housing 31 and extends into the relief groove 31b, and the nut is threadedly connected to the free end of the screw in the relief groove 31b. Among them, the riveting fastener can include a rivet, and at least one end of the rivet can be deformed, so as to cooperate with the other end to produce a riveting connection effect. The deformed end can be the outer end of the fastener 4, that is, located in the above-mentioned relief groove 31b, or the inner end of the fastener 4, that is, abutting against the printed circuit board 33. The specific structural form of the fastener 4 is not limited in this embodiment.

[0066] In the technical solution provided by this application, a partial area of the bottom wall of the first housing 31 is recessed inward, so that an installation protrusion 31a is presented on the inner side of the first housing 31, and a relief groove 31b is presented on the outer side of the first housing 31. An assembly hole 311 communicating with the relief groove 31b is formed at the top of the installation protrusion 31a. A via hole 331 is formed at the position where the printed circuit board 33 abuts against the installation protrusion 31a. The fastener 4 is inserted through the assembly hole 311 and the via hole 331. The existence of the relief groove 31b provides a relief space for the end of the fastener 4, so that the outer end of the fastener 4 can abut against the groove wall of the relief groove 31b. The protruding characteristic of the installation protrusion 31a raises the printed circuit board 33 relative to the bottom wall of the first housing 31, and the electronic components arranged thereon can obtain sufficient installation space. Moreover, since the installation protrusion 31a is formed by the inward depression of a partial area of the bottom wall of the first housing 31, there are many processing methods available for this structure. For example, when forming the installation protrusion 31a by means of injection molding demolding, only conventional demolding needs to be carried out on both the inner and outer sides of the first housing 31. Compared with the inclined top demolding method for the traditional side-opening riveting platform, this solution can adopt a simpler demolding method to form the installation protrusion 31a that meets the fastening requirements.

[0067] Please refer to Figure 5 , in an embodiment, a blocking portion is arranged in the relief groove 31b, and the blocking portion is used to block the assembly hole 311.

[0068] It should be noted that there is usually an assembly gap between the fastener 4 and the assembly hole 311. The function of the "blocking portion" is to block the assembly hole 311 to block this assembly gap. There are various structural types of the blocking portion. For example, the blocking portion can be a cover plate structure covering the notch of the relief groove 31b, or a colloid structure filled in the relief groove 31b, as long as it can achieve the function of using the relief groove 31b to block the assembly hole 311. This implementation does not limit this. Although Figure 5 the blocking portion is not shown in

[0069] In the above technical solution, after the fastener 4 is inserted through the assembly hole 311 and firmly connects the printed circuit board 33 to the installation protrusion 31a, by setting the blocking portion, the function of blocking the assembly hole 311 can be achieved, thereby improving the sealing and protection level of the first housing 31.

[0070] In an embodiment, the blocking portion includes sealant.

[0071] The "sealant" is in a fluid state before use and is usually in a solid state after use. The specific material of the sealant in this embodiment is not limited.

[0072] In the above technical solution, a sealant is used to seal the assembly hole 311 in the recess, which will solidify after a period of time to achieve a stable connection with the first shell 31. The operation process is relatively simple and the sealing reliability is high.

[0073] See also Figure 5 In one embodiment, the fastener 4 includes a limiting portion 42 and a rod portion 41 connected to each other, the limiting portion 42 presses the printed circuit board 33 toward the mounting protrusion 31a; the rod portion 41 is connected to the limiting portion 42 and penetrates the assembly hole 311 and the through hole 331 along the first direction X; a plurality of elastic protrusions 411 are distributed on the rod portion 41 in the first direction X and extend laterally along the rod portion 41, and the elastic protrusions 411 are configured to be elastically retractable in the lateral direction, and one of the elastic protrusions 411 is stretched and arranged in the makeshift groove 31b and abuts against the groove wall of the makeshift groove 31b.

[0074] Regarding the “lateral direction of the rod 41 ”, the rod 41 extends along the first direction X, and the lateral direction thereof refers to any direction intersecting with the first direction X, for example Figure 5 In the embodiment, the lateral direction of the rod 41 can be the left and right direction. The limiting portion 42 is used to press the end face of the printed circuit board 33 away from the mounting protrusion 31a, so the limiting portion 42 should extend along the lateral direction relative to the rod 41, for example, the limiting portion 42 can be a limiting flange; the elastic protrusion 411" extends along the lateral direction of the rod 41, and can be elastically contracted along the lateral direction, so that the elastic protrusion 411 can be elastically contracted by the inner wall of the assembly hole 311 when the rod 41 extends into the assembly hole 311, and can be elastically extended after extending out of the assembly hole 311; the purpose of arranging a plurality of elastic protrusions 411 in the first direction X is that, during the process of the fastener 4 being inserted into the assembly hole 311, there is always an elastic protrusion 411 that can be elastically expanded on the outside of the first shell 31, that is, elastically expanded in the clearance groove 31b, so as to abut against the groove wall of the clearance groove 31b.

[0075] In the above technical solution, the rod portion 41 of the fastener 4 is passed through the assembly hole 311 and the through hole 331, and at least one of the multiple elastic protrusions 411 formed on its side wall can pass through the outside of the first shell 31 along with the rod portion 41, so as to elastically expand in the make way groove 31b to abut against the groove wall of the make way groove 31b. With the cooperation of the limiting portion 42 of the fastener 4, the printed circuit board 33 and the mounting protrusion 31a can be quickly fastened and connected.

[0076] See also Figure 5 In one embodiment, an elastic sealing portion 5 is provided between the printed circuit board 33 and the mounting protrusion 31 a.

[0077] "The elastic sealing part 5" refers to a component that is elastic in material and has sealing ability. The most common elastic sealing material is rubber material. The material of this embodiment is not limited. In one example, as Figure 5 shown, the elastic sealing part 5 is a rubber gasket.

[0078] In the above technical solution, by arranging the elastic sealing part 5 between the printed circuit board 33 and the mounting protrusion 31a, it can not only seal the connection interface between the printed circuit board 33 and the mounting protrusion 31a, but also provide a certain amount of installation allowable error for the fastener 4 through its own elastic deformation.

[0079] Combined with the solution that the fastener 4 is set as the limiting part 42 and the rod part 41, the elastic sealing part 5 makes one of the multiple elastic protrusions 411 on the rod part 41 just extend out of the assembly hole 311 through its own elastic deformation, so as to provide a more stable fastening point for the fastener 4.

[0080] Please refer to Figure 5 , in one embodiment, the battery monitoring unit 3 further includes a second housing 32, and the second housing 32 covers the housing opening of the first housing 31.

[0081] The "second housing 32" covers the housing opening of the first housing 31, which can generally be considered as a sealed cover. By setting a sealant at the connection edge between the first housing 31 and the second housing 32, the purpose of sealing can be achieved, but it is not limited to this.

[0082] In the above technical solution, by covering the housing opening of the first housing 31 with the second housing 32, a relatively sealed environment can be formed between the two housings, so as to ensure the sealing protection level of the second housing 32 and the first housing 31 for the printed circuit board 33.

[0083] In one embodiment, at least one of the materials of the fastener 4, the first housing 31, and the second housing 32 is an insulating material.

[0084] It should be noted that at least one of the materials of the fastener 4, the first housing 31, and the second housing 32 being an insulating material can mean that only one of them is an insulating material, or only two of them are insulating materials, or all three of them are insulating materials; there are various types of insulating materials, such as the most common plastic material.

[0085] In the above technical solution, making at least one of the materials of the fastener 4, the first housing 31, and the second housing 32 an insulating material can reduce the generation of suspended metal fragments during the fastening installation of the fastener 4, thereby reducing the situation that the battery monitoring unit 3 fails the withstand voltage test due to the existence of suspended metal fragments.

[0086] See also Figure 5 In one embodiment, the second shell 32 is formed with a connecting portion 321 corresponding to the mounting protrusion 31a, and the connecting portion 321 and the mounting protrusion 31a are correspondingly abutted against the two sides of the printed circuit board 33 in the first direction X; one end of the fastener 4 in the first shell 31 abuts against the side of the connecting portion 321 away from the mounting protrusion 31a.

[0087] See also Figure 4 and Figure 5 In one embodiment, the second shell 32 is formed with a connecting portion 321 corresponding to the mounting protrusion 31a, the connecting portion 321 abuts against the side of the printed circuit board 33 away from the mounting protrusion 31a, and is formed with a connecting hole 3211 connected to the through hole 331; one end of the fastener 4 extends out of the connecting hole 3211 and abuts against the connecting portion 321 toward the printed circuit board 33.

[0088] The "connection portion 321" refers to the area on the second housing 32 corresponding to the mounting protrusion 31a. Since the second housing 32 covers the housing opening of the first housing 31, in order to achieve the connection portion 321 abutting against the printed circuit board 33, the connection portion 321 also needs to be formed similarly to the mounting protrusion 31a and approach the printed circuit board 33, such as Figure 4 As shown, the connection portion 321 is configured as a recessed structure facing the printed circuit board 33 .

[0089] In the above technical solution, the second shell 32 is abutted against the printed circuit board 33 through its connecting portion 321, and the fastener 4 can fasten the second shell 32, the printed circuit board 33 and the first shell 31 together through the connecting hole 3211 of the connecting portion 321, eliminating the need to set a separate connecting structure for the second shell 32 and the first shell 31, reducing production costs and improving the assembly efficiency of the battery monitoring unit 3.

[0090] In one embodiment, the fastener 4 , the connecting portion 321 , and the mounting protrusion 31 a correspond one to one to form a fastening group, and a plurality of fastening groups are provided corresponding to the periphery of the printed circuit board 33 .

[0091] It should be noted that the “periphery of the printed circuit board 33” refers to the boundary of the extended surface of the printed circuit board 33, for example Figure 5 As shown in FIG. 1 , the peripheral shape of the printed circuit board 33 is adapted to the peripheral side wall of the first housing 31 .

[0092] In the above technical solution, a plurality of fastening groups are provided along the periphery of the printed circuit board 33 , which can improve the installation stability between the printed circuit board 33 , the first shell 31 and the second shell 32 .

[0093] The present application also proposes an electric device, which includes a battery device 100. The specific structure of the battery device 100 refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device 100 is used to provide electric energy to the electric device, which includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid vehicles and extended-range vehicles, as well as engineering vehicles such as electric excavators and electric bulldozers, and can also include aircraft such as electric drones and electric passenger aircraft.

[0094] The present application also proposes a battery device 100, which includes a box body 1, in which a battery monitoring unit 3 and a battery cell 2 are arranged, and the battery monitoring unit 3 includes a first shell 31, a second shell 32, a printed circuit board 33 and a fastener 4, the first shell 31 has a shell opening arranged toward the first direction X, a local area of ​​the bottom wall of the first shell 31 is recessed inward to form a mounting protrusion 31a on the inner side of the first shell 31, and a clearance groove 31b is formed on the outer side of the first shell, and an assembly hole 311 is formed on the top of the mounting protrusion 31a to penetrate outward; the printed circuit board 33 is arranged in the first shell 31, the printed circuit board 33 is electrically connected to the battery cell 2, and the printed circuit board 33 is formed with a through hole 331 corresponding to the assembly hole 311; the second shell 32 covers the shell opening of the first shell 31, and the second shell 32 is formed with a connecting portion 321 corresponding to the mounting protrusion 31a, and the connecting portion 321 is connected to the mounting protrusion The fastener 4 includes a stopper 42 and a rod 41 connected to each other. The rod 41 extends along the first direction X and passes through the connection hole 3211, the through hole 331, and the assembly hole 311. The rod 41 is provided with a plurality of elastic protrusions 411, which are arranged along the first direction X and along the lateral direction of the rod 41. The elastic protrusion 411 is configured to be able to elastically retract and contract in the lateral direction of the rod portion 41, wherein one of the elastic protrusions 411 is stretched and arranged on the outer side of the first shell 31 and abuts against the inner wall of the make way groove 31b, and the limiting portion 42 abuts against the side of the connecting portion 321 of the second shell 32 away from the mounting protrusion 31a; wherein the fastener 4, the connecting portion 321, and the mounting protrusion 31a correspond one by one to form a fastening group, and a plurality of fastening groups are arranged corresponding to the periphery of the printed circuit board 33.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: The invention comprises a box body, wherein a battery monitoring unit and a battery cell are arranged in the box body, and the battery monitoring unit comprises: A first shell having a shell opening arranged toward a first direction, a local area of ​​a bottom wall of the first shell being recessed inwardly to form a mounting protrusion on the inner side of the first shell and a clearance groove on the outer side of the first shell, and a mounting hole penetrating to the clearance groove being formed at the top of the mounting protrusion; a printed circuit board, which is in the first housing and electrically connected to the battery cell, the printed circuit board abuts against the mounting protrusion and is formed with a through hole corresponding to the assembly hole; and A fastener is inserted through the assembly hole and the through hole, one end of the fastener abuts against the groove wall of the clearance groove, and the other end presses the end surface of the printed circuit board away from the mounting protrusion.

2. The battery device according to claim 1, characterized in that A blocking portion is arranged in the recess, and the blocking portion is used to block the assembly hole.

3. The battery device according to claim 2, characterized in that: The sealing portion includes a sealant.

4. The battery device according to claim 1, wherein: The fastener comprises: A limiting portion, pressing the printed circuit board toward the mounting protrusion; a rod portion, connected to the limiting portion and passing through the assembly hole and the through hole along the first direction; and A plurality of elastic protrusions are distributed on the rod portion in the first direction and extend laterally along the rod portion. The elastic protrusions are configured to be elastically retractable in the lateral direction. One of the elastic protrusions is stretched in the clearance groove and abuts against the groove wall of the clearance groove.

5. The battery device according to any one of claims 1 to 4, characterized in that: An elastic sealing portion is arranged between the printed circuit board and the mounting protrusion.

6. The battery device according to any one of claims 1 to 4, characterized in that: The battery monitoring unit further includes a second shell, which covers the shell opening of the first shell.

7. The battery device according to claim 6, characterized in that: At least one of the fastener, the first shell, and the second shell is made of insulating material.

8. The battery device according to claim 6, characterized in that: The second housing is formed with a connecting portion corresponding to the mounting protrusion, the connecting portion abuts against a side of the printed circuit board away from the mounting protrusion, and is formed with a connecting hole communicating with the via hole; One end of the fastener extends out of the connection hole and abuts against the connection portion toward the printed circuit board.

9. The battery device according to claim 8, characterized in that: The fasteners, the connecting parts, and the mounting protrusions correspond one to one to form a fastening group, and a plurality of the fastening groups are arranged corresponding to the periphery of the printed circuit board.

10. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 9.

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