Battery, battery management system and electric equipment

Abstract

The utility model discloses a battery, a battery management system and electric equipment, the battery comprises a box body, at least two battery monomers arranged in the box body and the battery management system, the battery monomers are electrically connected with the battery management system, the battery management system comprises a shell and a control circuit board, the shell comprises a bottom shell and an upper cover which are detachably connected, and the control circuit board is electrically connected with the bottom shell. A mounting cavity is defined by the bottom shell and the upper cover, an opening communicated with the mounting cavity is formed in the upper cover, and the edge of the opening is bent towards the interior of the mounting cavity to be connected with an abutting part; the control circuit board is arranged in the installation cavity, a connector is arranged on the side, facing the upper cover, of the control circuit board, the end, away from the control circuit board, of the connector penetrates through and is exposed out of the opening, and a butt joint part is formed on the peripheral side of the connector. The abutting part abuts against the surface, away from the control circuit board, of the butt joint part. According to the battery, the assembly tolerance difficulty of a battery management system can be reduced, and the dustproof effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery, a battery management system and electrical equipment. Background Art

[0002] The Battery Management System (BMS) is the core component of the battery. The BMS usually includes a shell and a control circuit board arranged in the shell. The shell protects the control circuit board to prevent the battery cells in the battery from expanding due to charging and causing squeezing and damage to the control circuit board.

[0003] In the related art, the upper cover in the shell is generally formed by injection molding. In order to meet the dustproof requirements, the upper cover needs to fit tightly with the connector port on the control circuit board, which makes it difficult to control the fitting tolerance between the upper cover and the connector port, otherwise the dustproof effect will be poor. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery, aiming to solve the problem that the matching tolerance between the upper cover and the connector port of the battery management system in the battery is difficult to control due to dust prevention.

[0005] To achieve the above object, the battery provided by the utility model comprises a box, at least two battery cells arranged in the box, and a battery management system, wherein the battery cells are electrically connected to the battery management system, and the battery management system comprises:

[0006] A housing, the housing comprising a detachably connected bottom housing and an upper cover, the bottom housing and the upper cover enclose a mounting cavity, the upper cover is provided with an opening communicating with the mounting cavity, an edge of the opening is bent toward the mounting cavity and connected to an abutment portion; and

[0007] A control circuit board is arranged in the installation cavity, a connector is provided on the side of the control circuit board facing the upper cover, an end of the connector away from the control circuit board is passed through and exposed to the opening, a docking portion is formed on the peripheral side of the connector, and the abutting portion abuts against the surface of the docking portion away from the control circuit board.

[0008] The control circuit board in the battery management system is used to electrically connect with the battery cells, so that the safe use of the battery during charging and discharging can be monitored and managed. Among them, the connector is used to realize the electrical connection between the control circuit board and the external structure. The shell protects the control circuit board arranged therein, and the opening provided in the upper cover is used to realize the external connection of the connector. By providing an abutment portion at the edge of the opening and a docking portion on the side of the connector, the abutment portion abuts against the surface of the docking portion away from the control circuit board, which is equivalent to converting the abutment fit between the original opening and the connector in the horizontal direction into an abutment fit in the closing direction of the upper cover. There is no need to consider the tolerance fit between the opening and the connector, thereby reducing the difficulty of fit and meeting the dustproof requirements.

[0009] In an embodiment of the present invention, a longitudinal section of the abutting portion is parallel to an axial direction of the opening, and is disposed perpendicularly to a surface of the docking portion that is away from the control circuit board.

[0010] The abutting portion and the butting portion are vertically butted against each other, thereby increasing the abutting area and improving the abutting stability, thereby achieving a better dustproof effect.

[0011] In one embodiment of the utility model, the connector includes a fixing portion and a connecting portion, one end of the fixing portion is connected to the control circuit board, and the other end is connected to the connecting portion, the connecting portion is passed through and exposed to the opening, the cross-sectional area of ​​the fixing portion is smaller than the cross-sectional area of ​​the connecting portion, and the docking portion is connected to the peripheral side of the connecting portion.

[0012] The connector of this structure can reduce the area occupied by the control circuit board and can reduce the entry of dust into the fixing part, thereby improving the dust-proof effect.

[0013] In an embodiment of the present invention, an end surface of the butting portion away from the connecting portion is flush with a surface of the abutting portion away from the connector.

[0014] On the basis of increasing the abutment area, the material usage of the butt joint is reduced, thereby reducing costs.

[0015] In an embodiment of the present invention, one end of the docking portion away from the connecting portion is bent and connected to a stop portion, the stop portion is arranged toward the upper cover and is located at a side of the abutting portion away from the connecting portion.

[0016] The stopper can further provide dust protection and improve the dustproof effect.

[0017] In an embodiment of the present invention, the fixing portion, the stopping portion, the docking portion and the connecting portion are an integrally formed structure.

[0018] The connector of this structure has good structural stability and prolonged service life.

[0019] In an embodiment of the present invention, the space enclosed by the abutting portion is gap-matched with the connector.

[0020] This structure can facilitate the assembly of the upper cover and is also helpful for dust prevention.

[0021] In an embodiment of the present invention, the space enclosed by the abutting portion is interference fit with the connector.

[0022] This structure can further enhance the dust-proof effect.

[0023] In one embodiment of the utility model, the bottom shell is formed with a mounting groove, the groove edge of the mounting groove is formed with a first step structure, the edge of the upper cover is formed with a second step structure, and the step surfaces of the first step structure respectively abut against the step surfaces of the second step structure so that the upper cover sealing limit is located at the groove edge of the mounting groove.

[0024] The groove walls of the first step structure and the second step structure are butted against each other to increase the connection area between the upper cover and the bottom shell, thereby improving the dustproof effect.

[0025] The utility model also proposes a battery management system, which includes:

[0026] A housing, the housing comprising a detachably connected bottom housing and an upper cover, the bottom housing and the upper cover enclose a mounting cavity, the upper cover is provided with an opening communicating with the mounting cavity, the opening is bent toward an edge in the mounting cavity and connected to an abutment portion; and

[0027] A control circuit board is arranged in the installation cavity, a connector is provided on the side of the control circuit board facing the upper cover, an end of the connector away from the control circuit board is passed through and exposed to the opening, a docking portion is formed on the peripheral side of the connector, and the abutting portion abuts against the surface of the docking portion away from the control circuit board.

[0028] The utility model also provides an electrical device, comprising any battery as described above; or, comprising the battery management system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the electric equipment of the utility model;

[0031] Figure 2 It is a partial exploded diagram of the battery of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of an embodiment of a battery management system of the utility model;

[0033] Figure 4 for Figure 3 A schematic diagram of the structure of the battery management system from another perspective is shown;

[0034] Figure 5 for Figure 3 A top view of the battery management system shown;

[0035] Figure 6 for Figure 5 The cross-sectional view along line AA is shown;

[0036] Figure 7 for Figure 6 The enlarged view of point B in the middle;

[0037] Figure 8 A cross-sectional view of another embodiment of the battery management system of the utility model;

[0038] Fig. 9 for Figure 8 Enlarged view of point C in the middle.

[0039] Description of Figure Numbers:

[0040] 100. Battery; 10. Battery management system; 11. Shell; 11a. Mounting cavity; 111. Bottom shell; 1111. Mounting groove; 1112. First step structure; 112. Upper cover; 1121. Opening; 1122. Abutment portion; 1123. Second step structure; 12. Control circuit board; 13. Connector; 131. Docking portion; 132. Fixing portion; 133. Connecting portion; 134. Stopper; 20. Battery cell; 21. Cell; 30. Box; 31. First part; 32. Second part; 200. Controller; 300. Motor.

[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, 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 the present invention can be understood according to specific circumstances.

[0045] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0046] Batteries mentioned in this field can be divided into disposable batteries and rechargeable batteries according to whether they are rechargeable. Common types of rechargeable batteries currently include: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0047] The battery described in the embodiments of the present invention refers to a rechargeable battery. The embodiments disclosed in the present invention will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present invention are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present invention can be directly or indirectly applied to an appropriate device to power the device.

[0048] The battery mentioned in the embodiments disclosed in the present utility model refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity, which can be a battery module or a battery pack. A battery cell is the basic unit in a battery and can be used to make a battery module or a battery pack. A battery module is formed by connecting a certain number of battery cells in series and / or in parallel and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. A battery pack generally includes a battery module, a battery management system, and a box that accommodates the battery module and the battery management system. The battery management system is used to monitor and manage the charging and discharging process of the battery module.

[0049] Usually, the battery management system is separately provided with a shell for protection and is installed in the box, so it generally does not need dust prevention management. However, in some special environments, it is found that dust prevention settings are required to meet performance requirements. At this time, when the shell includes a bottom shell and an upper cover, the control component arranged in the shell needs to be connected to the outside through a connector, and a hole needs to be opened in the upper cover to expose the connector. The size of the opening needs to form a close fit with the connector port to meet the dust prevention requirements. However, the upper cover that is usually injection molded is easy to deform, and it is difficult to control the matching accuracy between the opening and the connector port, which makes it difficult to have both dust prevention effect and assembly convenience.

[0050] Based on the above background, the utility model proposes a battery, which improves the battery management system in the battery, sets an abutment portion at the opening of the upper cover, and sets a docking portion on the peripheral side of the connector. The abutment between the abutment portion and the docking portion in the closing direction of the upper cover can reduce the difficulty of the matching tolerance between the opening and the connector in the peripheral direction, and at the same time achieve a better dustproof effect.

[0051] The battery disclosed in the embodiments of the present application can be used in electrical equipment that uses the battery as a power source or various energy storage systems that use the battery as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0052] For the convenience of explanation, the following examples are referred to Figure 1 , an electrical device in one embodiment of the present application is taken as an example of a vehicle.

[0053] Figure 1 The electrical equipment provided for some embodiments of the present application is a schematic diagram of the structure of a vehicle. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle, and the battery 100 may be provided at the bottom, head or tail of the vehicle. The battery 100 may be used to power the vehicle, for example, the battery 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle.

[0054] In some embodiments of the present application, the battery 100 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.

[0055] refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery includes a box 30, at least two battery cells 20, and a battery management system 10, wherein the box 30 is used to provide a storage space for the battery cells 20 and the battery management system 10, and the box 30 can adopt a variety of structures. In some embodiments, the box 30 may include a first part 31 and a second part 32, the first part 31 and the second part 32 cover each other, and the first part 31 and the second part 32 jointly define a storage space. The second part 32 may be a hollow structure with one end open, the first part 31 may be a plate-like structure, the first part 31 covers the open side of the second part 32, so that the first part 31 and the second part 32 jointly define a storage space; the first part 31 and the second part 32 may also be hollow structures with one side open, and the open side of the first part 31 covers the open side of the second part 32. Of course, the box 30 formed by the first part 31 and the second part 32 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0056] In the battery 100, there can be multiple battery cells 20, and the multiple battery cells 20 are connected in series, in parallel, or in a mixed connection to form a whole, and are contained in the box 30. Each battery cell 20 is composed of multiple battery cells 21 that are first connected in series, in parallel, or in a mixed connection. Of course, in the battery 100, it can also be directly composed of multiple battery cells 21, and the multiple battery cells 21 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 21 are both connected in series and in parallel, and then the whole formed by the multiple battery cells 21 is contained in the box 30. The battery 100 may also include other structures, for example, it may also include a busbar component for realizing electrical connection between multiple battery cells 20 or battery cells 21.

[0057] Each battery cell 21 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, etc. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes.

[0058] The battery of the present application is introduced with specific embodiments below:

[0059] Please refer to Figures 3 to 7 In one embodiment of the utility model, a battery 100 includes a box body 30, at least two battery cells 20 arranged in the box body 30, and a battery management system 10, wherein the battery cells 20 are electrically connected to the battery management system 10, and the battery management system 10 includes a shell 11 and a control circuit board 12, wherein the shell 11 includes a detachably connected bottom shell 111 and an upper cover 112, wherein the bottom shell 111 and the upper cover 112 are enclosed to form an installation cavity 11a, wherein the upper cover 112 is provided with an opening 1121 communicating with the installation cavity 11a, and an edge of the opening 1121 is bent toward the inside of the installation cavity 11a and connected to an abutment portion 1122;

[0060] The control circuit board 12 is arranged in the installation cavity 11a, and a connector 13 is provided on the side of the control circuit board 12 facing the upper cover 112. The connector 13 is passed through one end away from the control circuit board 12 and exposed to the opening 1121. A docking portion 131 is formed on the surrounding side of the connector 13, and the abutting portion 1122 abuts against the surface of the docking portion 131 away from the control circuit board 12.

[0061] In this embodiment, the box body 30 and the battery cell 20 may refer to the structures discussed above, and will not be described in detail here.

[0062] The shell 11 is a structure for providing protection and installation space for the control circuit board 12. Its shape can be a rectangular parallelepiped, a cube or other shapes, which are not limited here. The material of the shell 11 can be metal. The metal shell 11 has good conductivity, corrosion resistance and mechanical strength, and can effectively protect the control circuit board 12. At the same time, the metal shell 11 can also provide good heat dissipation performance to ensure that the control circuit board 12 does not generate excessively high temperatures during operation. It can also be plastic. The plastic shell 11 has the characteristics of light weight, good insulation, impact resistance and easy processing. It can effectively protect the internal structure while reducing the weight and cost of the battery.

[0063] The housing 11 includes a detachably connected bottom shell 111 and an upper cover 112, and the detachable connection between the two can be a threaded connection, a snap connection, an interference fit connection, etc., which is not limited here. The bottom shell 111 is used to provide a structure for carrying the control circuit board 12. After the upper cover 112 is connected to the bottom shell 111, it encloses to form an installation cavity 11a, thereby providing a function of isolating external dust and water vapor. In one example, one of the bottom shell 111 and the upper cover 112 can form a slot structure, and the other is a plate structure, and the plate structure covers the opening 1121 of the slot structure to form the installation cavity 11a. In another example, the bottom shell 111 and the upper cover 112 are both slot structures, and the two are connected to enclose to form the installation cavity 11a.

[0064] The control circuit board 12 is a structure that carries various electrical components and circuit structures that implement monitoring and management logic in the battery management system 10. For example, by combining various sensors, it can monitor the voltage, current, temperature and other performance of the battery in real time, or it can be provided with various control elements. When an abnormal situation occurs in the battery, it can make timely adjustments to cut off or adjust the current to protect the safety of the battery and the equipment.

[0065] Specifically, the control circuit board 12 includes a board body and a plurality of components arranged on the board body, including a connector 13 for electrical connection and signal transmission with the outside. The connector 13 can not only realize the electrical connection between battery modules, but also realize signal transmission with external electrical equipment, so that the battery status can be monitored and managed in real time. It can be understood that the connector 13 generally includes a mounting seat and a wiring terminal installed on the mounting seat, which is convenient for plug-in connection with the outside. The end of the connector 13 away from the control circuit board 12 is the connecting portion 133. The number of connectors 13 can be one, or two or more. When the number of connectors 13 is two or more, the number of openings 1121 opened in the corresponding upper cover 112 is also two or more.

[0066] Correspondingly, the upper cover 112 is provided with an opening 1121, and the opening 1121 is connected to the installation cavity 11a, so that the connection portion 133 of the connector 13 can extend from the opening 1121, which is convenient for connection. The shape of the opening 1121 is adapted to the cross-sectional shape of the connector 13, for example, both are rectangular in shape. The inner edge of the opening 1121 is bent toward the installation cavity 11a and connected with an abutment portion 1122, and the extension direction of the abutment portion 1122 can be perpendicular to the surface of the upper cover 112, or can be inclined to the surface of the upper cover 112, which is not limited here. The abutment portion 1122 can be an integrally formed structure with the upper cover 112, so that it can be formed by integral injection molding, which is convenient for processing and has good stability of the connection structure. In other examples, the abutment portion 1122 can also be welded or disassembled to the opening 1121 of the upper cover 112. It can be understood that the inner edge of the opening 1121 is annular, so the abutment portion 1122 is also arranged in an annular shape.

[0067] A docking portion 131 is formed on the circumferential side of the connector 13, and the docking portion 131 is also annular, and the docking portion 131 is formed with an end face facing the upper cover 112, which can abut against the abutment portion 1122. The annular docking portion 131 and the abutment portion 1122 can achieve complete sealing in the circumferential direction of the connector 13. The end face of the docking portion 131 can be parallel to the surface of the upper cover 112, and can also be set at an angle relative to the surface of the upper cover 112. In this way, when assembling the battery management system 10, the bottom shell 111 is placed on a horizontal plane, and then the control circuit board 12 is installed in the bottom shell 111, and then the upper cover 112 is covered on the bottom shell 111 from top to bottom and connected. The connecting portion 133 of the connector 13 extends out from the opening 1121, and the abutting portion 1122 abuts against the docking portion 131 from top to bottom, thereby forming a dust-proof abutting surface that is docked up and down. The connection between the upper cover 112 and the bottom shell 111 can achieve an interference fit between the abutting portion 1122 and the docking portion 131, thereby improving the dust-proof sealing performance, and the matching tolerance between the connector 13 and the opening 1121 can also be relaxed to improve the convenience of assembly.

[0068] The control circuit board 12 of the battery management system 10 in the battery of the present technical solution is used to be electrically connected to the battery cell 20, so as to monitor and manage the safe use of the battery 100 during the charging and discharging process. Among them, the connector 13 is used to realize the electrical connection between the control circuit board 12 and the external structure. The shell 11 protects the control circuit board 12 arranged therein, and the opening 1121 opened by the upper cover 112 is used to realize the external connection of the connector 13. By setting an abutment portion 1122 at the edge of the opening 1121 and setting a docking portion 131 on the side of the connector 13, the abutment portion 1122 abuts against the surface of the docking portion 131 away from the control circuit board 12, which is equivalent to converting the abutment fit between the original opening 1121 and the connector 13 in the horizontal direction into an abutment fit in the closing direction of the upper cover 112, without considering the tolerance fit between the opening 1121 and the connector 13, thereby reducing the difficulty of fit and meeting the dustproof requirements.

[0069] Please continue to refer to Figure 7 In one embodiment of the present invention, the longitudinal section of the abutting portion 1122 is parallel to the axial direction of the opening 1121 , and is perpendicularly arranged to the surface of the docking portion 131 away from the control circuit board 12 .

[0070] In this embodiment, the longitudinal section of the abutment portion 1122 refers to the cross-sectional structure formed by cutting the abutment portion 1122 along the longitudinal direction of the shell 11 when the shell 11 is placed on a horizontal plane and the surface of the upper cover 112 is parallel to the horizontal plane. The axial direction of the opening 1121 is the direction of the central axis of the opening 1121 when the surface of the upper cover 112 is parallel to the water surface, that is, the vertical direction. The longitudinal section of the abutment portion 1122 is parallel to the axial direction of the opening 1121, which means that the abutment portion 1122 extends in the vertical direction. The surface of the docking portion 131 facing away from the control circuit board 12 is also the surface facing the upper cover 112, and the abutment portion 1122 is perpendicular to it, that is, the surface of the docking portion 131 facing away from the control circuit board 12 is a horizontal plane.

[0071] The abutment portion 1122 and the docking portion 131 of the present technical solution are vertically abutted, which can make the abutment portion 1122 closer to the peripheral side of the connector 13 and reduce the ingress of dust; at the same time, it can also increase the abutment area and vertical abutment force between the two, improve the abutment stability, and have a better dustproof effect.

[0072] In one embodiment of the present utility model, the connector 13 includes a fixing portion 132 and a connecting portion 133, one end of the fixing portion 132 is connected to the control circuit board 12, and the other end is connected to the connecting portion 133, the connecting portion 133 is passed through and exposed to the opening 1121, the cross-sectional area of ​​the fixing portion 132 is smaller than the cross-sectional area of ​​the connecting portion 133, and the docking portion 131 is connected to the peripheral side of the connecting portion 133.

[0073] In this embodiment, the fixing portion 132 is one end of the connector 13 connected to the control circuit board 12, and the connecting portion 133 is one end of the connector 13 away from the control circuit board 12. The connector 13 includes a mounting seat and a wiring terminal or pin disposed on the mounting seat. The bottom structure of the mounting seat forms the fixing portion 132, and the top structure of the mounting seat forms a slot. The wiring terminal or pin is inserted into the slot and is electrically connected to the circuit of the control circuit board 12. The top structure of the mounting seat and the wiring terminal or pin form the connecting portion 133. The cross-sectional area of ​​the fixing portion 132 is smaller than the cross-sectional area of ​​the connecting portion 133, which means that the cross-sectional area of ​​the bottom structure of the mounting seat is smaller than the cross-sectional area of ​​the top structure. Here, the bottom occupies a small part of the mounting seat in the vertical direction, and the top structure occupies a large part of the mounting seat in the vertical direction, so that a step structure is formed at the connection between the fixing portion 132 and the connecting portion 133. The docking portion 131 is connected to the peripheral side of the connecting portion 133, that is, located at the peripheral side of the top structure of the mounting seat.

[0074] The connector 13 of the present technical solution can reduce the area occupied by the control circuit board 12. At the same time, the docking portion 131 can shield the fixing portion 132, thereby reducing the entry of dust into the fixing portion 132 and improving the dustproof effect.

[0075] Please refer to Figure 7 In one embodiment of the present invention, the end surface of the docking portion 131 away from the connecting portion 133 is flush with the surface of the abutting portion 1122 away from the connector 13 .

[0076] In this embodiment, the docking portion 131 is a structure extending in the circumferential direction along the circumferential side surface away from the connector 13 on the side surface of the connector 13, and its end surface away from the connector 13 is the surface away from the connector 13 to the end away from the connector 13, that is, when the docking portion 131 is in a rectangular block or rectangular plate shape, the end surface is the side surface away from and not connected to the connector 13. The surface of the abutting portion 1122 away from the connector 13 is also the surface of the abutting portion 1122 facing the cavity wall of the installation cavity 11a, which is flush with the end surface of the docking portion 131 away from the connector 13, which means that the two are in the same plane, or approximately in the same plane.

[0077] This technical solution can reduce the volume of the docking portion 131 on the basis of increasing the abutting area between the docking portion 131 and the abutting portion 1122, thereby reducing the material usage of the docking portion 131, reducing costs, and also reducing the space occupied by the installation cavity 11a, which is conducive to miniaturization.

[0078] Please refer to Figure 8 and Fig. 9In one embodiment of the present invention, one end of the docking portion 131 away from the connecting portion 133 is bent and connected to a stop portion 134 , and the stop portion 134 is arranged toward the upper cover 112 and is located on a side of the abutting portion 1122 away from the connecting portion 133 .

[0079] In this embodiment, the stopper 134 is bent and connected to the docking portion 131, which means that the stopper 134 extends from the end of the docking portion 131 in a direction away from the connecting portion 133, and is arranged at an angle with the extending direction of the docking portion 131. Optionally, the stopper 134 and the docking portion 131 are arranged perpendicular to each other, that is, the angle is 90 degrees. The stopper 134 is arranged toward the upper cover 112, which means that the stopper 134 is bent and extended from the end of the docking portion 131 toward the upper cover 112. The stopper 134 is located on the side of the abutting portion 1122 away from the connecting portion 133, and its specific position is not limited. In one example, the stopper 134 is arranged at intervals from the abutting portion 1122, which can avoid interference with the abutting portion 1122, and the adaptation tolerance can also be ignored, thereby reducing the difficulty of assembling the upper cover 112. In another example, the stopper 134 is arranged adjacent to or abutting the abutting portion 1122, thereby further improving the dustproof effect.

[0080] In this technical solution, based on the first dust-proof structure formed by the abutment of the docking portion 131 and the abutment portion 1122, the stop portion 134 can form a second dust-proof structure, and the dust-proof channels of the two are at an angle to each other, further providing dust blocking and improving the dust-proof effect.

[0081] In an embodiment of the present invention, the fixing portion 132 , the stopping portion 134 , the docking portion 131 , and the connecting portion 133 are an integrally formed structure.

[0082] In this embodiment, the fixing portion 132, the stopper portion 134, the docking portion 131 and the connecting portion 133 are an integrally formed structure, which means that the four are made of the same material and are integrally formed by a process. For example, when the mounting seat of the connector 13 is made of plastic, the connecting portion 133, the fixing portion 132, the docking portion 131 and the stopper portion 134 are formed together by an integral injection molding process. The connector 13 of this structure has good structural stability, a long service life, and is easy to process and assemble.

[0083] Please refer again Figure 7 In one embodiment of the present invention, the space enclosed by the abutting portion 1122 is gap-matched with the connector 13 .

[0084] In this embodiment, the abutment portion 1122 is annular, and the clearance fit between the abutment portion 1122 and the connector 13 means that the two have approximately the same size and are adapted within a tolerance range that can be easily controlled. For example, when the cross section of the connector 13 is rectangular or circular, the space enclosed by the abutment portion 1122 is a rectangular channel or a circular channel. This structure can facilitate the assembly of the upper cover 112 and reduce the entry of dust to a certain extent.

[0085] In other examples, the size of the space enclosed by the abutting portion 1122 may be larger than the cross-sectional size of the connector 13 .

[0086] In another example, the space enclosed by the abutment portion 1122 is interference-fitted with the connector 13, so that the two cooperate to form a sealing structure. In this way, two sealing structures are formed between the connector 13 and the upper cover 112, further improving the sealing performance and reducing the entry of dust. Even if there is a processing error, the second sealing can be performed through the matching structure of the abutment portion 1122 and the docking portion 131, without requiring too high tolerance matching requirements, and facilitating processing.

[0087] Please refer to Figure 7 and Fig. 9 In one embodiment of the utility model, the bottom shell 111 is formed with a mounting groove 1111, the groove edge of the mounting groove 1111 is formed with a first step structure 1112, the edge of the upper cover 112 is formed with a second step structure 1123, and the step surfaces of the first step structure 1112 respectively abut against the step surfaces of the second step structure 1123, so that the sealing limit of the upper cover 112 is located at the groove edge of the mounting groove 1111.

[0088] In this embodiment, the bottom shell 111 has a mounting groove 1111, and the upper cover 112 is a plate structure that covers the notch of the mounting groove 1111. A first step structure 1112 is formed at the edge of the notch of the mounting groove 1111. The first step structure 1112 includes two first step surfaces that are vertically arranged, and the vertically extending first step surface can face the inner side of the mounting groove 1111. A second step structure 1123 is formed at the edge of the upper cover 112. The second step structure 1123 has two second step surfaces that are perpendicular to each other. The first step surface and the second step surface extending along the horizontal plane abut against each other, the vertically extending first step surface abuts against the edge side of the upper cover 112, and the second step surface extending along the vertical plane abuts against the groove side wall of the mounting groove 1111.

[0089] By docking the groove walls of the first step structure 1112 and the second step structure 1123, the connection area between the upper cover 112 and the bottom shell 111 is increased, the passage for dust to enter is lengthened, and the tortuosity of the dust to enter is increased, thereby improving the dustproof effect.

[0090] In one example, the connection between the upper cover 112 and the bottom shell 111 can be achieved by interference fit of the groove wall of the first step structure 1112 and the second step structure 1123. In another example, based on the above structure, a hook is formed on the edge of the upper cover 112, and the hook is extended perpendicular to the surface direction of the upper cover 112. A clamping hole is provided on the groove side wall of the mounting groove 1111. When the upper cover 112 is covered on the bottom shell 111, the hook is clamped into the clamping hole and abuts against the hole wall of the clamping hole. This structure facilitates disassembly and assembly, and improves assembly efficiency. Optionally, multiple hooks and clamping holes are provided, and multiple hooks are arranged at intervals along the circumference of the upper cover 112, and one hook is clamped into one clamping hole to improve connection stability.

[0091] The utility model also proposes a battery management system 10, which includes a housing 11 and a control circuit board 12. The housing 11 includes a bottom shell 111 and an upper cover 112 which are detachably connected. The bottom shell 111 and the upper cover 112 are enclosed to form an installation cavity 11a. The upper cover 112 is provided with an opening 1121 communicating with the installation cavity 11a. The opening 1121 is bent toward the edge in the installation cavity 11a and connected with an abutment portion 1122. The control circuit board 12 is arranged in the installation cavity 11a. A connector 13 is provided on the side of the control circuit board 12 facing the upper cover 112. One end of the connector 13 away from the control circuit board 12 is penetrated and exposed to the opening 1121. A butt joint portion 131 is formed on the peripheral side of the connector 13. The butt joint portion 1122 abuts against the surface of the butt joint portion 131 away from the control circuit board 12. The battery management system adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0092] The utility model also provides an electric device, including any of the above-mentioned batteries 100, or including the above-mentioned battery management system 10. The battery or battery management system 10 of the electric device adopts all the technical solutions of all the above-mentioned embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0093] The electrical device may be a mobile phone, a laptop computer, a battery car, an electric car, an energy storage station, etc. The present application does not limit the specific type of the electrical device. When the electrical device includes a battery, the battery may be used to provide electrical energy.

[0094] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery, characterized in that: The battery comprises a box, at least two battery cells arranged in the box, and a battery management system, wherein the battery cells are electrically connected to the battery management system, and the battery management system comprises: A housing, the housing comprising a detachably connected bottom housing and an upper cover, the bottom housing and the upper cover enclose a mounting cavity, the upper cover is provided with an opening communicating with the mounting cavity, an edge of the opening is bent toward the mounting cavity and connected to an abutment portion; and A control circuit board, the control circuit board is arranged in the installation cavity, and a connector is arranged on a side of the control circuit board facing the upper cover; One end of the connector away from the control circuit board is passed through and exposed to the opening. A docking portion is formed on the peripheral side of the connector. The abutting portion abuts against a surface of the docking portion away from the control circuit board.

2. The battery according to claim 1, characterized in that The longitudinal section of the abutting portion is parallel to the axial direction of the opening, and is arranged perpendicular to the surface of the docking portion away from the control circuit board.

3. The battery according to claim 1 or 2, characterized in that The connector includes a fixing portion and a connecting portion, one end of the fixing portion is connected to the control circuit board, and the other end is connected to the connecting portion, the connecting portion is passed through and exposed to the opening, the cross-sectional area of ​​the fixing portion is smaller than the cross-sectional area of ​​the connecting portion, and the docking portion is connected to the peripheral side of the connecting portion.

4. The battery according to claim 3, characterized in that An end surface of the butting portion away from the connecting portion is flush with a surface of the abutting portion away from the connector.

5. The battery according to claim 3, characterized in that One end of the docking portion away from the connecting portion is bent and connected to a stop portion, and the stop portion is arranged toward the upper cover and is located at a side of the abutting portion away from the connecting portion.

6. The battery according to claim 5, characterized in that The fixing portion, the stopping portion, the docking portion and the connecting portion are an integrally formed structure.

7. The battery according to claim 1 or 2, characterized in that: The space enclosed by the abutting portion is gap-matched with the connector.

8. The battery according to claim 1 or 2, characterized in that: The space enclosed by the abutting portion is interference-fitted with the connector.

9. The battery according to claim 1 or 2, characterized in that: The bottom shell is formed with a mounting groove, the groove edge of the mounting groove is formed with a first step structure, the edge of the upper cover is formed with a second step structure, and the step surfaces of the first step structure respectively abut against the step surfaces of the second step structure so that the sealing limit of the upper cover is located at the groove edge of the mounting groove.

10. A battery management system, characterized in that: The battery management system comprises: A housing, the housing comprising a detachably connected bottom housing and an upper cover, the bottom housing and the upper cover enclose a mounting cavity, the upper cover is provided with an opening communicating with the mounting cavity, an edge of the opening is bent toward the mounting cavity and connected to an abutment portion; and A control circuit board, the control circuit board is arranged in the installation cavity, and a connector is arranged on a side of the control circuit board facing the upper cover; One end of the connector away from the control circuit board is passed through and exposed to the opening. A docking portion is formed on the peripheral side of the connector. The abutting portion abuts against a surface of the docking portion away from the control circuit board.

11. An electrical device, characterized in that: Comprising the battery as claimed in any one of claims 1 to 9; or comprising the battery management system as claimed in claim 10.

Images