Protective shell, battery management system, battery, electric equipment and energy storage equipment

Abstract

The utility model relates to the related technical field of batteries, and discloses a protective shell, a battery, electric equipment and energy storage equipment, the protective shell is used for a battery management system, the battery management system comprises a circuit board assembly, the protective shell comprises a base, a fixed connecting piece and a shell, the fixed connecting piece is arranged on the base in a protruding mode in the first direction, and the fixed connecting piece is arranged in the shell; the first direction is parallel to the thickness direction of the base. The shell and the base are arranged in a spaced mode in the first direction, the shell is provided with a containing cavity, the circuit board assembly is arranged in the containing cavity, and the fixed connecting piece penetrates through the shell and the circuit board assembly to be fixedly connected with the shell and the circuit board assembly. Thus, the base and the shell are connected into a whole through the fixed connecting piece, the strength of the protective shell is improved, and meanwhile, the circuit board assembly can be prevented from being separated from the shell or shaking in the shell.

Description

Technical Field

[0001] This application relates to the field of battery-related technologies, and in particular to a protective casing, a battery management system, a battery, an electrical device, and an energy storage device. Background Technology

[0002] This section provides only background information relevant to this application and is not necessarily prior art.

[0003] Batteries have advantages such as high energy density and high power density, and are widely used in electronic devices and transportation, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships and power tools.

[0004] As the application scope of batteries continues to expand in various fields, how to reduce the impact of external shocks on batteries is receiving increasing attention from those skilled in the art. Utility Model Content

[0005] In view of the above problems, this application provides a protective casing, a battery management system, a battery, an electrical device, and an energy storage device. The protective casing can reduce the impact of external shocks on the circuit board assembly and prevent the circuit board assembly from detaching or shaking, which is beneficial to improving the stability of the battery management system.

[0006] The first aspect of this application discloses a protective housing for a battery management system, the battery management system including a circuit board assembly. The protective housing includes a base, a fixing connector, and a shell. The fixing connector is along a first direction and protrudes from the base. The first direction is parallel to the thickness direction of the base. The shell is spaced apart from the base along the first direction and has a receiving cavity. The circuit board assembly is disposed within the receiving cavity. The fixing connector passes through the shell and the circuit board assembly to be fixedly connected to the shell and the circuit board assembly.

[0007] In the technical solution of this application embodiment, the base and the housing are connected by a fixing connector to form an integral structure, which improves the strength of the housing. When the housing of the circuit board assembly is impacted due to transportation or drops, the base can absorb the impact force, improving the protective strength of the housing and minimizing the force on the circuit board assembly, effectively protecting the safety of the circuit board assembly and contributing to the stability of the circuit board assembly's operation. Furthermore, the fixing connector passes through the circuit board assembly and the housing to fix them together, which can prevent the circuit board assembly from detaching from the housing or shaking inside the housing, thereby making the battery management system operate more stably.

[0008] In addition, the protective casing according to this application may also have the following additional technical features:

[0009] In some embodiments of this application, the housing includes a first cover and a second cover. The first cover is disposed along a first direction and opposite to the base. The second cover is also along the first direction and is movably fitted onto the side of the first cover opposite to the base. The second cover and the first cover together form the receiving cavity. In this embodiment, the housing is movably fitted onto the first cover by the second cover, which facilitates the disassembly and installation of the circuit board assembly.

[0010] In some embodiments of this application, the first cover includes a first wall and a first side wall. The first wall is disposed parallel to the base. The first side wall surrounds the periphery of the first wall and together with the first wall forms a first receiving groove with an opening facing the second cover. The circuit board assembly is at least partially located within the first receiving groove. The first wall and the circuit board assembly are spaced apart. In this embodiment, the first receiving groove formed by the first wall and the first side wall allows the first cover to accommodate at least a portion of the circuit board assembly. The spaced arrangement between the first wall and the circuit board assembly prevents the circuit board assembly from contacting the first wall and causing damage to the circuit board assembly.

[0011] In some embodiments of this application, the first cover further includes a first reinforcing rib located on the first sidewall and protruding toward the first receiving groove relative to the first sidewall; and / or a second reinforcing rib located on the first wall and protruding toward the base relative to the first wall. In this embodiment, by providing a first reinforcing rib on the first sidewall, the strength of the first sidewall can be improved. Furthermore, the first reinforcing rib protruding toward the first receiving groove relative to the first sidewall allows it to abut against the circuit board assembly, reducing the shaking of the circuit board assembly. By providing a second reinforcing rib on the first wall, the strength of the first wall can be improved, thereby enhancing its compressive strength.

[0012] In some embodiments of this application, the first reinforcing rib is an arc-shaped reinforcing rib, and the radius of curvature of the first reinforcing rib gradually increases along the direction from the second cover toward the first wall. In this embodiment, the first reinforcing rib is set as an arc-shaped reinforcing rib, which can further improve the strength of the first sidewall. The gradual increase in the radius of curvature of the first reinforcing rib along the direction from the second cover toward the first wall can strengthen the thickness of the top of the first sidewall and ensure the strength of each position of the first sidewall.

[0013] In some embodiments of this application, the first reinforcing rib includes a plurality of ribs, which are spaced apart along the length of the first sidewall. In this embodiment, arranging the plurality of first reinforcing ribs along the length of the first sidewall can further improve the strength of the first sidewall.

[0014] In some embodiments of this application, the first cover further includes a first abutting wall located on the side of the first sidewall near the second cover and connected to the first sidewall. The first abutting wall protrudes away from the first receiving groove relative to the first sidewall. The first abutting wall is provided with a locking hole, and the fixing connector passes through the locking hole to be fixedly connected to the first cover. In this embodiment, by limiting the first abutting wall, the second cover can be closed on the first abutting wall and can be connected to the fixing connector to achieve locking.

[0015] In some embodiments of this application, the circuit board assembly includes a motherboard. The first abutment wall includes a first surface, a second surface, and a first stepped surface connecting the first surface and the second surface. Along a first direction, the second surface is disposed close to the first wall. The first surface, the second surface, and the first stepped surface form a first recessed platform, and the motherboard is mounted on the first recessed platform. In this embodiment, by providing a first recessed platform on the first abutment wall, the motherboard can be mounted within the first recessed platform, thereby reducing the shaking of the circuit board assembly within the housing and improving the stability of the battery management system.

[0016] In some embodiments of this application, the distance between the first stepped surface and the motherboard is less than or equal to 0.5 mm. In this embodiment, by limiting the distance between the first stepped surface and the motherboard, the first stepped surface can limit the position of the motherboard, thus preventing the circuit board assembly from shaking.

[0017] In some embodiments of this application, the distance between the first wall and the circuit board assembly is greater than or equal to 4.5 mm. In this embodiment, limiting the dimension between the first wall and the circuit board assembly can prevent the circuit board assembly from contacting the first wall and causing damage to the circuit board assembly, thus ensuring the safety of the circuit board assembly within the housing.

[0018] In some embodiments of this application, the second cover includes a second wall and a second side wall. The second wall is disposed parallel to the base. The second side wall surrounds the periphery of the second wall and together with the second wall forms a second receiving groove with an opening facing the first cover. The circuit board assembly is at least partially located within the second receiving groove. In this embodiment, the second receiving groove formed by the second wall and the second side wall allows the second cover to accommodate at least a portion of the circuit board assembly. The spaced arrangement between the second wall and the circuit board assembly prevents the second cover from contacting the first wall when pressed, thus avoiding damage to the circuit board assembly and ensuring the safety of the circuit board assembly within the housing.

[0019] In some embodiments of this application, the second cover further includes: a third reinforcing rib located on the second sidewall and protruding relative to the second sidewall toward the second receiving groove; and / or a fourth reinforcing rib located on the second wall and protruding relative to the second wall toward a direction away from the base. In this embodiment, by providing a third reinforcing rib on the second sidewall, the strength of the second sidewall can be improved. Furthermore, the third reinforcing rib protruding relative to the second sidewall toward the second receiving groove allows it to abut against the circuit board assembly, reducing the shaking of the circuit board assembly. Additionally, by providing a third reinforcing rib on the second wall, the strength of the second wall can be improved, thereby enhancing its compressive strength.

[0020] In some embodiments of this application, the third reinforcing rib is an arc-shaped reinforcing rib, and the radius of curvature of the third reinforcing rib gradually increases from the base toward the second wall. In this embodiment, the third reinforcing rib is set as an arc-shaped reinforcing rib, which can further improve the strength of the second sidewall. The gradual increase in the radius of curvature of the third reinforcing rib along the direction from the base toward the second wall can strengthen the thickness of the top of the second sidewall, thus ensuring the strength of the second sidewall at the top position.

[0021] In some embodiments of this application, the third reinforcing rib includes multiple ribs, which are spaced apart along the length of the second sidewall. In this embodiment, the arrangement of multiple third reinforcing ribs along the length of the second sidewall can further improve the strength of the second sidewall.

[0022] In some embodiments of this application, the second cover further includes: a second abutment wall located on the side of the second sidewall close to the first cover and connected to the second sidewall; the second abutment wall protruding away from the second receiving groove relative to the second sidewall; the second abutment wall having a locking hole; and the fixing connector passing through the locking hole to be fixedly connected to the second cover. In this embodiment, by limiting the second abutment wall, the second cover can be closed onto the first cover, and can be connected to the fixing connector to achieve locking of the circuit board assembly.

[0023] In some embodiments of this application, the circuit board assembly includes a motherboard, and the second abutment wall includes a third surface, a fourth surface, and a second stepped surface connecting the third surface and the fourth surface. Along a first direction, the fourth surface is disposed close to the second wall, and the third surface, the fourth surface, and the second stepped surface form a second recessed platform. The motherboard is mounted on the second recessed platform. In this embodiment, by providing a second recessed platform on the second abutment wall, the motherboard can be mounted within the second recessed platform, thereby reducing the shaking of the circuit board assembly within the housing and improving the stability of the battery management system.

[0024] In some embodiments of this application, the distance between the second stepped surface and the motherboard is less than or equal to 0.5 mm. In this embodiment, by limiting the distance between the second stepped surface and the motherboard, the second stepped surface can limit the position of the motherboard, thus preventing the circuit board assembly from shaking.

[0025] In some embodiments of this application, the distance between the second wall and the circuit board assembly is greater than or equal to 4.5 mm. In this embodiment, limiting the size between the second wall and the circuit board assembly can reduce the risk of damage to the circuit board assembly caused by the second wall coming into contact with it due to elastic deformation under pressure, thus ensuring the safety of the circuit board assembly within the housing.

[0026] In some embodiments of this application, the housing further includes a folding connector, which is located on one side of the first cover along a second direction and connects the first cover and the second cover respectively. The second direction is parallel to the width direction of the base. In this embodiment, the first cover and the second cover are connected as a whole by the folding connector, so that the second cover can move relative to the first cover, thereby facilitating the installation of the circuit board assembly inside the first cover and the second cover.

[0027] In some embodiments of this application, the folding connector has a first form and a second form. In the first form, the second cover is closed onto the first cover. In the second form, the first cover is detached from the second cover. In the second form, the projection of the folding connector in the second direction is bow-shaped. In this embodiment, by setting the folding connector in a bow shape, the strength of the folding connector can be effectively reduced, thereby reducing the opening degree of the fold after the cover is closed.

[0028] In some embodiments of this application, the folding connector has a slot. In this embodiment, by providing a slot on the folding connector, the strength of the folding connector can be effectively reduced, thereby reducing the opening degree of the fold after the cover is closed.

[0029] In some embodiments of this application, both the first cover and the second cover include a snap fastener. Along the second direction, the snap fastener is located on the side of the first cover and the second cover opposite to the folding connector, and the first cover and the second cover are connected by the snap fastener. In this embodiment, by limiting the snap fastener, the second cover can engage with the first cover when it is placed on the first cover, thereby improving the stability and reliability of the connection between the first cover and the second cover.

[0030] In some embodiments of this application, the buckle includes at least one of a circular buckle and a strip buckle. In this embodiment, by limiting the type of buckle, the stability and reliability of the connection between the first cover and the second cover can be improved.

[0031] In some embodiments of this application, the latch includes a circular latch and a strip latch. Along a third direction, the circular latch is located on both sides of the strip latch, and the third direction is the length direction of the base. In this embodiment, by limiting the type of latch, the circular latch can withstand a larger force-bearing area, making the connection between the first cover and the second cover more stable and reliable, and less prone to loosening. The strip latch can adapt to different length fixing requirements. Therefore, while ensuring the engagement strength of the first cover and the second cover, it can prevent large gaps from forming between the first cover and the second cover due to deformation, thus avoiding the circuit board assembly from falling off.

[0032] In some embodiments of this application, the fixing connector includes a press-fit nut and a locking screw. Along a first direction, one end of the press-fit nut is connected to the base, and the other end abuts against the housing. The locking screw passes through the housing and the circuit board assembly and is screwed onto the press-fit nut. In this embodiment, the sheet metal nut is fixed to the base and abuts against the housing, and the locking screw passes through the housing and the circuit board assembly and is screwed onto the press-fit nut, so that the base, housing, and circuit board assembly are connected as a whole, improving the overall drop resistance and structural strength.

[0033] In some embodiments of this application, the distance between the housing and the base along the first direction is greater than or equal to 2 mm and less than or equal to 10 mm. In this embodiment, by limiting the distance between the housing and the base, damage to the housing caused by contact friction between the housing and the base can be avoided, thus ensuring the safety of the housing.

[0034] In some embodiments of this application, the surface of the housing is coated with an antistatic coating. In this embodiment, the antistatic coating can improve the antistatic capability of the housing.

[0035] A second aspect of this application provides a battery management system, including a circuit board assembly and a protective housing as described in any embodiment of this application.

[0036] The battery management system according to this application has the same beneficial effects as the protective casing proposed in this application or any embodiment of this application.

[0037] A third aspect of this application proposes a battery, including the battery management system of this application.

[0038] The battery according to this application has the same beneficial effects as the protective casing proposed in any embodiment of this application.

[0039] A fourth aspect of this application provides an electrical device including the battery described above, the battery being used to store or provide electrical energy.

[0040] The electrical equipment according to this application has the same beneficial effects as the protective enclosure proposed in this application or any embodiment of this application.

[0041] A fifth aspect of this application discloses an energy storage device comprising the battery described in this application, the battery being used to store or provide electrical energy.

[0042] The energy storage device according to this application has the same beneficial effects as the protective casing proposed in this application or any embodiment of this application.

[0043] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0046] Figure 2 A schematic diagram of a protective casing provided in some embodiments of this application at one angle;

[0047] Figure 3 This is another schematic diagram of the protective casing provided in some embodiments of this application;

[0048] Figure 4 A cross-sectional view of the protective casing provided in some embodiments of this application at point AA;

[0049] Figure 5 Another cross-sectional view of the protective casing provided in some embodiments of this application at point AA;

[0050] Figure 6 for Figure 5 A magnified view of the portion shown in VI;

[0051] Figure 7 Another schematic diagram of the protective casing provided in some embodiments of this application;

[0052] Figure 8 A schematic diagram of the housing at one angle provided for some embodiments of this application;

[0053] Figure 9 A schematic diagram of the housing from yet another angle, provided for some embodiments of this application;

[0054] Figure 10 for Figure 9 A magnified view of the part shown in the middle (X).

[0055] The reference numerals in the detailed embodiments are as follows:

[0056] 1000 - Vehicle, 100 - Battery Management System, 10 - Protective Housing, 11 - Base, 12 - Fixing Connector, 121 - Press-fit Nut, 122 - Locking Screw, 13 - Housing, 1301 - Receiving Cavity, 131 - First Cover, 1311 - First Wall, 1312 - First Side Wall, 1313 - First Receiving Groove, 1314 - First Reinforcing Rib, 1315 - Second Reinforcing Rib, 1316 - First Abutting Wall, 13161 - First Surface, 13162 - Second Surface, 13163 - First Step Surface, 13 164-First recessed platform, 13165-Locking hole, 132-Second cover, 1321-Second wall, 1322-Second side wall, 1323-Second receiving groove, 1324-Third reinforcing rib, 1325-Fourth reinforcing rib, 1326-Second abutting wall, 13261-Third surface, 13262-Fourth surface, 13263-Second stepped surface, 13264-Second recessed platform, 133-Folding connector, 1331-Slot, 134-Snap fastener, 100-Battery, 200-Controller, 300-Motor;

[0057] Z, first direction; Y, second direction; X, third direction. Detailed Implementation

[0058] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0063] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0065] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0067] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields.

[0068] To intelligently manage and maintain the individual battery cells, monitor battery status, and extend battery life, batteries typically incorporate a Battery Management System (BMS). A BMS is an electronic device composed of battery electronic components and a battery control unit. The battery electronic components collect electrical and thermal data from individual battery cells (integrated) or battery modules (integrated) and provide this data to the battery control unit. The battery control unit controls or manages the electrical or thermal performance of the battery system and can interact with other control units on the vehicle. In simpler terms, a BMS consists of a data collector and a controller. The data collector gathers electrical and thermal information from each individual battery cell, while the controller manages or controls the battery's electrical or thermal performance. The controller is generally a Printed Circuit Board Assembly (PCBA). During manufacturing, a housing is typically included to protect and support the PCBA, while also providing insulation and waterproofing, ensuring a good operating environment for the PCBA during long-term use.

[0069] The casing typically consists of a shell and a cover structure, with the cover connecting to the shell. Together, the cover and shell press against and press the circuit board assembly to secure it. However, due to this cover design, when the casing is subjected to external impact or drops, the impact force can cause significant vibration to the circuit board assembly inside. Over time, this can affect the strength of the circuit board assembly, thus impacting the normal operation of the battery management system and the battery's usability. Furthermore, it can easily cause the shell and cover to separate, resulting in the circuit board assembly detaching and posing a risk of damage.

[0070] Based on the above considerations, and in order to address the issue of reducing the frequency of circuit board assembly detachment or damage during long-term use, this application discloses a protective housing for a battery management system. The battery management system includes a circuit board assembly, and the protective housing includes a base, a fixing connector, and a shell. The fixing connector protrudes from the base along a first direction, which is parallel to the thickness direction of the base. The shell is spaced apart from the base along the first direction and has a receiving cavity. The circuit board assembly is disposed within the receiving cavity, and the fixing connector passes through the shell and the circuit board assembly to be fixedly connected to them.

[0071] In the protective casing proposed in this application, the base and the casing are connected by a fixing connector to form an integral structure, which improves the strength of the casing. When the casing of the circuit board assembly is impacted due to transportation or drop, the base can absorb the impact force, improve the protective strength of the casing, minimize the force on the circuit board assembly, and effectively protect the safety of the circuit board assembly. Furthermore, the fixing connector passes through the circuit board assembly and the casing to fix them together, which can prevent the circuit board assembly from detaching from the casing or shaking inside the casing, thereby improving the stability of the battery management system.

[0072] The battery disclosed in this embodiment can be used in electrical devices that use batteries as a power source, or in various energy storage devices that use batteries as energy storage elements. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0073] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0074] Please refer to Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery 100 is installed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a controller 300. The controller 200 controls the battery 100 to supply power to the controller 300, for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0075] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0076] The following is for reference. Figures 2-10 The protective housing 10 according to a first aspect embodiment of the present invention is described. Figure 2 This is a schematic diagram of the protective shell 10 from one angle according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the protective shell 10 according to another angle of an embodiment of the present utility model. Figure 4 yes Figure 3 A cross-sectional view of the protective housing 10 shown at point AA; Figure 5 yes Figure 3 Another cross-sectional view of the protective casing 10 shown at point AA; Figure 6 yes Figure 5 A magnified view of the portion shown in VI; Figure 7 This is a schematic diagram of the protective casing 10 according to another angle of an embodiment of the present utility model; Figure 8 This is a schematic diagram of the housing 13 at one angle according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the housing 13 from another angle according to an embodiment of the present utility model; Figure 10 yes Figure 9 A magnified view of the part shown in the middle (X).

[0077] Please see Figure 2-10 The first aspect of this application proposes a protective housing 10 for a battery management system. The battery management system includes a circuit board assembly. The protective housing 10 includes a base 11, a fixing connector 12, and a housing 13. The fixing connector 12 is arranged along a first direction and protrudes from the base 11. The first direction is parallel to the thickness direction of the base 11. The housing 13 is arranged along the first direction and spaced apart from the base 11. The housing 13 has a receiving cavity 1301. The circuit board assembly is disposed in the receiving cavity 1301. The fixing connector 12 passes through the housing 13 and the circuit board assembly to be fixedly connected to the housing 13 and the circuit board assembly.

[0078] The circuit board assembly may include a motherboard and multiple components. The motherboard is used to house the multiple components, which can perform functions such as data acquisition, control, protection, communication, power calculation, signal transmission, and power transmission for the individual battery cells. This enables intelligent management and maintenance of the multiple battery cells, which is beneficial for improving battery performance and lifespan. In some embodiments, the motherboard may include a printed circuit board (PCB) with multiple lines connecting to the components of the circuit board assembly. In some embodiments, the motherboard may include a flexible printed circuit board (FPC) with multiple lines connecting to the components in the circuit board assembly.

[0079] The protective housing 10 in this embodiment is used to support and fix the circuit board assembly and provides good protection and insulation for the circuit board assembly. The protective housing 10 can be integrated into the battery or fixed to the outside of the battery.

[0080] The protective housing 10 in this embodiment may include a base 11, a fixing connector 12, and a housing 13. The base 11 is a structure designed to cushion impacts and vibrations received by the protective housing 10, absorbing the impacts. In some embodiments, the base 11 may be made of sheet metal, for example, aluminum alloy. Thus, during transport or drops, the base 11, being a sheet metal, can absorb maximum impact force, minimizing the stress on the circuit board assembly. The thickness of the base 11 may be 1.5 mm, its length is greater than the external dimensions of the housing 13, and its width is greater than or equal to the width of the circuit board assembly.

[0081] The housing 13 can be a component for protecting the circuit board assembly. Along a first direction, the housing 13 can be spaced apart from the base 11, where the first direction can be the thickness direction of the base 11. The housing 13 can form an outer shell structure of the circuit board assembly, reducing the possibility of the components in the circuit board assembly being bumped by external devices. The receiving cavity 1301 can be a cavity structure formed inside the housing 13 for accommodating the circuit board assembly. The housing 13 protects the circuit board assembly by forming the receiving cavity 1301 inside.

[0082] The shape of the receiving cavity 1301 can match the shape of the circuit board assembly, which makes the overall structure of the housing 13 and the circuit board assembly more coordinated and compact, which helps to reduce the volume of the protective housing 10 and facilitates the installation and fixation of the protective housing 10. The housing 13 can be designed as a cubic structure or a cylindrical structure. The shape of the housing 13 can be reasonably designed and adjusted according to the actual installation needs or the support and fixation needs of the circuit board assembly, so that the housing 13 can better play the role of support and fixation, and the housing 13 can be installed and fixed conveniently and reliably.

[0083] The housing 13 can be made of thermoforming material. It is understood that thermoforming material has advantages such as good plasticity, processability, light weight and high strength, and corrosion resistance. In addition, its production cost is low, thus reducing the cost of the protective housing 10.

[0084] The fixing connector 12 is the connection structure between the base 11 and the housing 13. Along the first direction, the fixing connector 12 protrudes relative to the base 11 towards the housing 13, and passes through the housing 13 and the circuit board assembly located within the housing 13, thereby fixing it to the housing 13 and the circuit board assembly. In other words, the fixing connector 12 can connect the housing 13, the base 11, and the circuit board assembly into one unit. Thus, while connecting the base 11 and the housing 13, the fixing connector 12 also provides a fixed and limiting function for the circuit board assembly.

[0085] The fixing connector 12 also has strong support strength and rigidity, and can play a role in fixing and supporting the shell 13. The fixing connector 12 can be a rod, pipe or other structure, and can be made of metal or non-metal.

[0086] The fixing connectors 12 may include multiple connectors, which may be arranged at intervals along the length and width directions of the base 11. The number of fixing connectors 12 may be 2, 3, 4, 5, 6, or even more. For example, please refer to... Figure 3 The number of fixing connectors 12 in this application can be six. Understandably, the arrangement of multiple fixing connectors 12 can improve the connection strength between the base 11 and the housing 13.

[0087] In some examples, the fixing connector 12 can be integrated with the base 11. For instance, the fixing connector 12 can be fixed to the base 11 by welding or hot-melt processes. This improves the connection strength between the base 11 and the fixing connector 12.

[0088] In the technical solution of this application embodiment, the base 11 and the housing 13 are connected by the fixing connector 12 to form an integral structure, which improves the strength of the protective housing 10. When the housing 13 of the circuit board assembly is impacted due to transportation or drop, the base 11 can absorb the impact force, improve the protective strength of the housing 13, minimize the force on the circuit board assembly, and effectively protect the safety of the circuit board assembly. In addition, the fixing connector 12 passes through the circuit board assembly and the housing 13 to be fixedly connected to the circuit board assembly and the housing 13, which can prevent the circuit board assembly from detaching from the housing 13 or shaking inside the housing 13, thereby making the battery management system operate more stably.

[0089] Please see Figure 4-10In some embodiments of this application, optionally, the housing 13 includes a first cover 131 and a second cover 132. The first cover 131 is disposed opposite to the base 11 along a first direction. Along the first direction, the second cover 132 is movably covered on the side of the first cover 131 away from the base 11. The second cover 132 and the first cover 131 together form a receiving cavity 1301.

[0090] Specifically, the first cover 131 and the second cover 132 can be manufactured using an integral molding process. For example, the first cover 131 and the second cover 132 can be manufactured using a vacuum forming process. The first cover 131 can be substantially spaced apart from and substantially parallel to the base 11. The spaced-apart arrangement of the first cover 131 and the base 11 can prevent the first cover 131 from colliding with the base 11 and causing damage to the first cover 131.

[0091] The second cover 132 is movably fitted onto the first cover 131. The first cover 131 may have a first receiving groove 1313 facing the second cover 132. The second cover 132 may have a second receiving groove 1323 corresponding to the first receiving groove 1313. The first receiving groove 1313 and the second receiving groove 1323 together form a receiving cavity 1301. In other words, the receiving cavity 1301 may include the first receiving groove 1313 and the second receiving groove 1323. The circuit board assembly may be disposed within the first receiving groove 1313 and the second receiving groove 1323. During the assembly of the circuit board assembly and the housing 13, the circuit board assembly may first be installed in the first receiving groove 1313 within the first cover 131, and then the second cover 132 may be fitted onto the first cover 131. The fixing connector 12 may pass through the first cover 131, the circuit board assembly, and the second cover 132, thereby fixing the first cover 131, the circuit board assembly, and the second cover 132.

[0092] In this embodiment, the housing 13 is movably covered by the second cover 132 on the first cover 131, which facilitates the disassembly and installation of the circuit board assembly.

[0093] like Figure 4 or Figure 5 As shown, in some embodiments of this application, optionally, the first cover 131 includes a first wall 1311 and a first side wall 1312. The first wall 1311 is arranged parallel to the base 11. The first side wall 1312 surrounds the periphery of the first wall 1311 and together with the first wall 1311 forms a first receiving groove 1313 with an opening facing the second cover 132. The circuit board assembly is at least partially located in the first receiving groove 1313. The first wall 1311 and the circuit board assembly are spaced apart.

[0094] Specifically, the first wall 1311 forms the bottom wall of the first receiving groove 1313, and is spaced apart from and relatively parallel to the base 11. The first side wall 1312 forms the side wall of the first receiving groove 1313. The first side wall 1312 may include multiple first side walls, which are circumferentially disposed around the periphery of the first wall 1311 and connected to the first wall 1311.

[0095] In this embodiment, a first receiving groove 1313 is formed by the first wall 1311 and the first side wall 1312, so that the first cover 131 can accommodate at least part of the circuit board assembly. The first wall 1311 and the circuit board assembly are spaced apart to avoid the circuit board assembly from contacting the first wall 1311 and causing damage to the circuit board assembly.

[0096] In some embodiments of this application, optionally, the first cover 131 may further include a first reinforcing rib 1314 and / or a second reinforcing rib 1315, wherein the first reinforcing rib 1314 is located on the first sidewall 1312 and protrudes toward the first receiving groove 1313 relative to the first sidewall 1312; and the second reinforcing rib 1315 is located on the first wall 1311 and protrudes toward the base 11 relative to the first wall 1311.

[0097] For example, the first cover 131 may include only a first reinforcing rib 1314, which is located on the first sidewall 1312 and protrudes towards the first receiving groove 1313 relative to the first sidewall 1312. As another example, the first cover 131 may include only a second reinforcing rib 1315 located on the first wall 1311. Yet another example is a first cover 131 including both the first reinforcing rib 1314 and the second reinforcing rib 1315, wherein the first reinforcing rib 1314 is located on the first sidewall 1312 and protrudes towards the first receiving groove 1313 relative to the first sidewall 1312; and the second reinforcing rib 1315 is located on the first wall 1311 and protrudes towards the base 11 relative to the first wall 1311. Understandably, the arrangement of the reinforcing ribs in the first cover 131 can be configured according to actual needs.

[0098] In this embodiment, by providing a first reinforcing rib 1314 on the first sidewall 1312, the strength of the first sidewall 1312 can be improved. Furthermore, the first reinforcing rib 1314 protrudes relative to the first sidewall 1312 toward the first receiving groove 1313, so that the first reinforcing rib 1314 can abut against the circuit board assembly, reducing the shaking of the circuit board assembly. By providing a second reinforcing rib 1315 on the first wall 1311, the strength of the first wall 1311 can be improved, thereby enhancing the compressive strength of the first wall 1311.

[0099] like Figure 4 As shown in Figure 5, in some embodiments of this application, optionally, the first reinforcing rib 1314 is an arc-shaped reinforcing rib, and the radius of curvature of the first reinforcing rib 1314 gradually increases along the direction from the second cover 132 toward the first wall 1311.

[0100] Understandably, since the first cover 131 is made using a vacuum forming process, due to the process, as the height of the first sidewall 1312 increases, the thickness of the first sidewall 1312 will gradually decrease, resulting in a sharp decrease in the strength of the top area of ​​the first sidewall 1312. The larger the radius of curvature of the first reinforcing rib 1314, the higher the strength of the first reinforcing rib 1314. Therefore, along the direction from the first wall 1311 to the second cover 132, the radius of curvature of the first reinforcing rib 1314 gradually increases, that is, the design of being larger at the top and smaller at the bottom can ensure the structural strength of the top of the first sidewall 1312, so that the first sidewall 1312 can better withstand external impacts, thereby further improving the support and fixation effect of the first cover 131 on the circuit board assembly.

[0101] In this embodiment, the first reinforcing rib 1314 is set as an arc-shaped reinforcing rib, which can further improve the strength of the first sidewall 1312. Along the direction from the first wall 1311 to the second cover 132, the radius of curvature of the first reinforcing rib 1314 gradually increases, which can strengthen the thickness of the top of the first sidewall 1312 and ensure the strength of each position of the first sidewall 1312.

[0102] In some embodiments of this application, please refer to Figure 5 Optionally, the first reinforcing rib 1314 may include a plurality of ribs, which are arranged at intervals along the length of the first sidewall 1312. Thus, the arrangement of the plurality of first reinforcing ribs 1314 along the length of the first sidewall 1312 can further improve the strength of the first sidewall 1312.

[0103] In some embodiments of this application, please refer to Figure 5 The second reinforcing rib 1315 comprises multiple ribs, which are arranged alternately along the length and width directions of the first wall 1311 to form a grid-like reinforcing rib. This further improves the compressive strength of the first wall 1311.

[0104] In some embodiments of this application, optionally, please refer to Figure 5 and Figure 6 The first cover 131 also includes a first abutting wall 1316, which is located on the side of the first side wall 1312 near the second cover 132 and is connected to the first side wall 1312. The first abutting wall 1316 protrudes from the first receiving groove 1313 relative to the first side wall 1312. The first abutting wall 1316 is provided with a locking hole 13165, and the fixing connector 12 passes through the locking hole 13165 to be fixedly connected to the first cover 131.

[0105] It should be noted that the main board of the circuit board assembly may have a through hole, and the locking hole 13165 on the first abutment wall 1316 corresponds to the through hole on the main board. Furthermore, the diameter of the locking hole 13165 on the first abutment wall 1316 may be larger than that of the through hole on the main board. For example, the diameter of the locking hole 13165 is equal to the diameter of the through hole on the main board plus 1 mm. The fixing connector 12 can pass through the locking hole 13165 and the through hole on the main board to lock the first cover 131 and the circuit board assembly.

[0106] In this embodiment, by limiting the first abutment wall 1316, the second cover 132 can cover the first abutment wall 1316 and can be connected to the fixed connector 12 to achieve locking.

[0107] In some embodiments of this application, optionally, please refer to Figure 5 and Figure 6 The circuit board assembly includes a motherboard. The first abutment wall 1316 includes a first surface 13161, a second surface 13162, and a first stepped surface 1316313163 connected to the first surface 13161 and the second surface 13162. Along the first direction, the second surface 13162 is disposed close to the first wall 1311. The first surface 13161, the second surface 13162, and the first stepped surface 1316313163 form a first recessed platform 13164. The motherboard is mounted on the first recessed platform 13164.

[0108] It should be noted that the battery management system may also include connectors that are plugged into the circuit board assembly, with the connector mating direction parallel to the surface of the circuit board assembly.

[0109] Specifically, the first surface 13161 and the second surface 13162 can be arranged in parallel. The first surface 13161 is the top surface of the first cover 131 and is located close to the second cover 132. When the second cover 132 is closed on the first cover 131, it is in contact with the first surface 13161. The second surface 13162 is the lower surface of the first recessed platform 13164. The motherboard is installed in the first recessed platform 13164 and abuts against the second surface 13162.

[0110] The distance between the first surface 13161 and the second surface 13162 is the height of the first recessed platform 13164. The height of the first recessed platform 13164 can be equal to the thickness of the motherboard, and the size of the first recessed platform 13164 can be approximately the same as or slightly larger than the motherboard. Thus, the motherboard is installed within the first recessed platform 13164, which helps to limit its movement, thereby reducing the wobbling of the circuit board assembly within the housing 13 and improving the stability of the battery management system.

[0111] In this embodiment, by providing a first recessed platform 13164 on the first abutting wall 1316, the motherboard can be installed in the first recessed platform 13164, thereby reducing the shaking of the circuit board assembly in the housing 13 and improving the stability of the battery management system.

[0112] In some embodiments of this application, optionally, the distance between the first step surface 13163 and the motherboard is less than or equal to 0.5 mm. For example, the distance between the first step surface 13163 and the motherboard can be 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0113] In this embodiment, by limiting the distance between the first step surface 13163 and the motherboard, the first step surface 13163 can limit the motherboard, thus preventing the circuit board assembly from shaking.

[0114] In some embodiments of this application, the distance between the first wall 1311 and the circuit board assembly is greater than or equal to 4.5 mm. For example, the distance between the first wall 1311 and the circuit board assembly can be, but is not limited to, 4.5 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm, 12 mm, etc.

[0115] In this embodiment, the dimensions between the first wall 1311 and the circuit board assembly are limited to prevent the circuit board assembly from coming into contact with the first wall 1311 and causing damage to the circuit board assembly, thus ensuring the safety of the circuit board assembly within the housing 13.

[0116] In some embodiments of this application, optionally, please refer to Figure 2-5 The second cover 132 includes a second wall 1321 and a second side wall 1322. The second wall 1321 is arranged parallel to the base 11. The second side wall 1322 surrounds the periphery of the second wall 1321 and together with the second wall 1321 forms a second receiving groove 1323 with an opening facing the first cover 131. The circuit board assembly is at least partially located in the second receiving groove 1323. In this embodiment, the second receiving groove 1323 is formed by the second wall 1321 and the second side wall 1322, so that the second cover 132 can accommodate at least part of the circuit board assembly. The second wall 1321 is spaced apart from the circuit board assembly to avoid the circuit board assembly being damaged by contact with the first wall 1311 when the second cover 132 is pressed, thus ensuring the safety of the circuit board assembly within the housing 13.

[0117] Specifically, the second wall 1321 forms the top wall of the second receiving groove 1323 and is arranged parallel to the first wall 1311 of the first cover 131. The second side wall 1322 forms the side wall of the second receiving groove 1323. Multiple second side walls 1322 may be included, circumferentially arranged around the periphery of the second wall 1321 and connected to the second wall 1321. The height of the second side wall 1322 may be 20 mm.

[0118] In some embodiments of this application, the second cover 132 further includes a third reinforcing rib 1324 and / or a fourth reinforcing rib 1325. The third reinforcing rib 1324 is located on the second sidewall 1322 and protrudes toward the second receiving groove 1323 relative to the second sidewall 1322; the fourth reinforcing rib 1325 is located on the second wall 1321 and protrudes toward the direction away from the base 11 relative to the second wall 1321.

[0119] For example, the second cover 132 may include only a third reinforcing rib 1324 located on the second sidewall 1322. As another example, the second cover 132 may include only a fourth reinforcing rib 1325 located on the second wall 1321. Yet another example is the first cover 131, which includes a first reinforcing rib 1314 and a second reinforcing rib 1315, wherein the first reinforcing rib 1314 is located on the first sidewall 1312 and protrudes towards the first receiving groove 1313 relative to the first sidewall 1312; the second reinforcing rib 1315 is located on the first wall 1311 and protrudes towards the base 11 relative to the second wall 1321. Understandably, the arrangement of the reinforcing ribs in the second cover 132 can be configured according to actual needs.

[0120] In this embodiment, by providing a third reinforcing rib 1324 on the second sidewall 1322, the strength of the second sidewall 1322 can be improved. Furthermore, the third reinforcing rib 1324 protrudes relative to the second sidewall 1322 toward the second receiving groove 1323, allowing the third reinforcing rib 1324 to abut against the circuit board assembly, reducing the shaking of the circuit board assembly. By providing a third reinforcing rib 1324 on the second wall 1321, the strength of the second wall 1321 can be improved, thereby enhancing the compressive strength of the second wall 1321. This prevents the second wall 1321 from undergoing elastic deformation and abutting against the circuit board assembly during assembly due to pressing, which could lead to damage to the circuit board assembly, further improving the safety of the battery management system.

[0121] In some embodiments of this application, optionally, the third reinforcing rib 1324 is an arc-shaped reinforcing rib, and the radius of curvature of the third reinforcing rib 1324 gradually increases from the base 11 toward the second wall 1321.

[0122] Understandably, since the second cover 132 is made using a vacuum forming process, due to the process, as the height of the second side wall 1322 increases, the thickness of the second side wall 1322 will gradually decrease, resulting in a sharp decrease in the strength of the top area of ​​the second side wall 1322. The larger the radius of curvature of the third reinforcing rib 1324, the higher the strength of the third reinforcing rib 1324. Therefore, along the direction from the bottom wall toward the second cover 132, the radius of curvature of the third reinforcing rib 1324 gradually increases, that is, the design of being larger at the top and smaller at the bottom can ensure the strength of the top of the second side wall 1322 and improve the strength of the second side wall 1322.

[0123] In this embodiment, the third reinforcing rib 1324 is set as an arc-shaped reinforcing rib, which can further improve the strength of the second sidewall 1322. Along the direction from the base 11 toward the second wall 1321, the radius of curvature of the third reinforcing rib 1324 gradually increases, which can strengthen the thickness of the top of the second sidewall 1322 and ensure the structural strength of the second sidewall 1322 at the top position, so that the second sidewall 1322 can better withstand external impact, thereby further improving the support and fixing effect of the second cover 132 on the circuit board assembly.

[0124] In some embodiments of this application, optionally, a plurality of third reinforcing ribs 1324 are included, and the plurality of third reinforcing ribs 1324 are arranged at intervals along the length direction of the second sidewall 1322. The number of third reinforcing ribs 1324 can be set according to actual needs, and the specific number is not limited. In this embodiment, the arrangement of a plurality of third reinforcing ribs 1324 along the length direction of the second sidewall 1322 can further improve the strength of the second sidewall 1322.

[0125] In some embodiments of this application, optionally, the second cover 132 further includes a second abutment wall 1326, located on the side of the second side wall 1322 close to the first cover 131, and connected to the second side wall 1322. The second abutment wall 1326 protrudes relative to the second side wall 1322 in a direction away from the second receiving groove 1323. The second abutment wall 1326 is provided with a locking hole 13165, and the fixing connector 12 passes through the locking hole 13165 to be fixedly connected to the second cover 132.

[0126] It should be noted that the main board of the circuit board assembly may have a through hole, and the locking hole 13165 on the second abutment wall 1326 is correspondingly provided with the through hole on the main board. Furthermore, the diameter of the locking hole 13165 on the second abutment wall 1326 may be larger than that of the through hole on the main board. For example, the diameter of the locking hole 13165 = the diameter of the through hole on the main board + 1 mm. The fixing connector 12 can pass through the locking hole 13165 and the through hole on the main board to achieve locking of the second cover 132 and the circuit board assembly.

[0127] It should be noted that the battery management system may also include connectors that are plugged into the circuit board assembly, with the connector mating direction parallel to the surface of the circuit board assembly.

[0128] In this embodiment, by limiting the second abutment wall 1326, the second cover 132 can cover the first cover 131, and can be connected with the fixed connector 12 to achieve locking of the circuit board assembly.

[0129] Please see Figure 4 , Figure 9 and Figure 10 In some embodiments of this application, optionally, the circuit board assembly includes a motherboard, and the second abutment wall 1326 includes a third surface 13261, a fourth surface 13262 and a second stepped surface 13263 connected to the third surface 13261 and the fourth surface 13262. Along the first direction, the fourth surface 13262 is disposed close to the second wall 1321, and the third surface 13261, the fourth surface 13262 and the second stepped surface 13263 form a second recessed platform 13264, and the motherboard is mounted on the second recessed platform 13264.

[0130] It should be noted that in this embodiment, the connector of the battery management system is perpendicular to the circuit board assembly surface.

[0131] Specifically, the third surface 13261 and the fourth surface 13262 can be arranged in parallel. The third surface 13261 is the bottom surface of the second cover 132, which is located close to the second cover 132 and is in contact with the first surface of the first cover 131 when it is closed. The fourth surface 13262 is the lower surface of the second recessed platform 13264. The main board is installed in the second recessed platform 13264 and abuts against the fourth surface 13262.

[0132] The distance between the third surface 13261 and the fourth surface 13262 is the height of the second recessed platform 13264. The height of the second recessed platform 13264 can be equal to the thickness of the motherboard, and the size of the second recessed platform 13264 can be approximately the same as or slightly larger than the motherboard. Thus, the motherboard is installed within the second recessed platform 13264, which helps to limit its movement, thereby reducing the wobbling of the circuit board assembly within the housing 13 and improving the stability of the battery management system. This, in turn, allows the battery to maintain a good operating condition.

[0133] In this embodiment, by providing a second recessed platform 13264 on the second abutment wall 1326, the motherboard can be installed in the second recessed platform 13264, thereby reducing the shaking of the circuit board assembly in the housing 13 and improving the stability of the battery management system.

[0134] In some embodiments of this application, optionally, the distance between the second step surface 13263 and the motherboard is less than or equal to 0.5 mm. For example, the distance between the second step surface 13263 and the motherboard can be 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0135] In this embodiment, by limiting the distance between the second step surface 13263 and the motherboard, the second step surface 13263 can limit the motherboard, thus preventing the circuit board assembly from shaking.

[0136] In some embodiments of this application, the distance between the second wall 1321 and the circuit board assembly is greater than or equal to 4.5 mm. For example, the distance between the first wall 1311 and the circuit board assembly can be, but is not limited to, 4.5 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm, 12 mm, etc.

[0137] In this embodiment, limiting the dimensions between the second wall 1321 and the circuit board assembly can reduce the risk of damage to the circuit board assembly caused by the elastic deformation of the second wall 1321 under pressure coming into contact with the circuit board assembly, thus ensuring the safety of the circuit board assembly within the housing 13.

[0138] like Figure 2 , 3 and Figure 7 As shown, in some embodiments of this application, optionally, the housing 13 further includes a folding connector 133. Along a second direction, the folding connector 133 is located on one side of the first cover 131 and connects the first cover 131 and the second cover 132 respectively. The second direction is parallel to the width direction of the base 11. The folding connector 133, the first cover 131, and the second cover 132 can be integrally formed using a vacuum forming process. The folding connector 133 can be connected to the first abutting wall 1316 of the first cover 131 and to the second abutting wall 1326 of the second cover 132.

[0139] In this embodiment, the first cover 131 and the second cover 132 are connected together by the folding connector 133, so that the second cover 132 can move relative to the first cover 131, thereby facilitating the installation of the circuit board assembly inside the first cover 131 and the second cover 132.

[0140] like Figure 7-9 As shown, in some embodiments of this application, optionally, the folding connector 133 has a first form and a second form. In the first form, the second cover 132 is closed onto the first cover 131. In the second form, the first cover 131 is detached from the second cover 132. In the second form, the projection of the folding connector 133 in the second direction is bow-shaped. Specifically, in the first form, the folding connector is in a bent state, and in the second form, the folding connector 133 is in an unfolded state.

[0141] In this embodiment, by setting the folding connector 133 in an arc shape, the strength of the folding connector 133 can be effectively reduced, thereby reducing the opening degree of the fold after the cover is closed.

[0142] like Figure 9 In some embodiments of this application, the folding connector 133 is provided with a slot 1331. There can be multiple slots 1331, and the shape of the slots 1331 can be at least one of rectangle, circle, and ellipse. For example, the slot 1331 can be rectangular, with a length of 20 mm and a width of 0.5 mm.

[0143] In this embodiment, by providing a slot 1331 on the folding connector 133, the strength of the folding connector 133 can be effectively reduced, thereby reducing the degree of opening at the fold after the cover is closed.

[0144] like Figure 3 He Ru Figure 9 According to some embodiments of this application, both the first cover 131 and the second cover 132 include a buckle 134. Along the second direction, the buckle 134 is located on the side of the first cover 131 and the second cover 132 away from the folding connector 133, and the first cover 131 and the second cover 132 are engaged and connected by the buckle 134.

[0145] During assembly, the second cover 132 moves toward the open side of the first cover 131, causing the latches 134 of the second cover 132 to engage with the corresponding latches 134 on the first cover 131, thereby completing the assembly of the second cover 132 and the first cover 131. Optionally, both the first cover 131 and the second cover 132 have multiple latches 134, which are arranged in a one-to-one correspondence.

[0146] Of course, the assembly connection between the first cover 131 and the second cover 132 can also be set in other forms. For example, the first cover 131 and the second cover 132 can be connected by a hinge on the same side in the width or length direction, and a snap-fit ​​structure 134 can be set on the other sides of the first cover 131 and the second cover 132. The first cover 131 and the second cover 132 can also be fastened together by bolts, or the first cover 131 and the second cover 132 can be connected by vibration friction welding.

[0147] In this embodiment, by limiting the buckle 134, the second cover 132 can engage with the first cover 131 when it is placed on the first cover 131, which improves the stability and reliability of the connection between the first cover 131 and the second cover 132, and makes the assembly of the first cover 131 and the second cover 132 more convenient.

[0148] In some embodiments of this application, the latch 134 includes at least one of a circular latch 134 and a strip latch 134. For example, both the first cover 131 and the second cover 132 include only circular latches 134; as another example, both the first cover 131 and the second cover 132 include only strip latches 134; and yet another example, both the first cover 131 and the second cover 132 include both circular latches 134 and strip latches 134. By limiting the type of latch 134, this embodiment can improve the stability and reliability of the connection between the first cover 131 and the second cover 132.

[0149] like Figure 9 As shown, in some embodiments of this application, the buckle 134 includes a circular buckle 134 and a strip buckle 134. Along a third direction, the circular buckle 134 is located on both sides of the strip buckle 134, and the third direction is the length direction of the base 11.

[0150] In this embodiment, by limiting the type of buckle 134, the circular buckle 134 can withstand a larger force area, making the connection between the first cover 131 and the second cover 132 more stable and reliable, and less prone to loosening. The strip buckle 134 can adapt to the fixing requirements of different lengths. Therefore, while ensuring the engagement strength of the first cover 131 and the second cover 132, it can prevent the circuit board assembly from falling off due to large gaps caused by deformation of the first cover 131 and the second cover 132.

[0151] In some embodiments of this application, the fixing connector 12 includes a press-fit nut 121 and a locking screw 122. Along the first direction, one end of the press-fit nut 121 is connected to the base 11, and the other end abuts against the housing 13. The locking screw 122 passes through the housing 13 and the circuit board assembly and is screwed to the press-fit nut 121.

[0152] Specifically, one end of the press-fit nut 121 abuts against the first cover 131, and the locking screw 122 passes through the locking holes 13165 of the first cover 131 and the second cover 132 and is screwed into the press-fit nut 121. In this embodiment, the sheet metal nut is fixed to the base 11 and abuts against the housing 13. The locking screw 122 passes through the housing 13 and the circuit board assembly and is screwed into the press-fit nut 121, so that the base 11, the housing 13 and the circuit board assembly are connected as one unit, which improves the overall drop resistance and structural strength of the protective shell 10.

[0153] Please see Figure 7 In some embodiments of this application, along the first direction, the distance H1 between the housing 13 and the base 11 is greater than or equal to 2 mm and less than or equal to 10 mm. For example, the distance H1 between the housing 13 and the base 11 can be 2 mm, 3 mm, 4 mm, 5 mm, 7 mm, 8 mm, or 10 mm.

[0154] This embodiment limits the distance H1 between the housing 13 and the base 11, that is, H1 is greater than or equal to 2 mm, which can avoid the housing 13 from being damaged due to contact friction between the housing 13 and the base 11, thus ensuring the safety of the housing 13. On the other hand, making H1 less than or equal to 10 mm can make the protective shell 10 have a compact structure and reduce the space occupied by the protective shell 10 on the battery.

[0155] In some embodiments of this application, the surface of the housing 13 is coated with an antistatic coating. In this embodiment, the antistatic coating can improve the antistatic capability of the housing 13.

[0156] The battery management system according to a second aspect of the present invention includes a circuit board and a protective housing 10 according to a first aspect of the present invention, wherein the circuit board is disposed within a receiving cavity 1301 of the housing 13.

[0157] Other components and operations of the battery management system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0158] According to the battery management system of this application, the base 11 and the housing 13 are connected by the fixing connector 12 to form an integral structure, thereby improving the strength of the housing. When the housing 13 of the circuit board assembly is impacted due to transportation or drop, the base 11 can absorb the impact force, improving the protective strength of the housing 13, minimizing the force on the circuit board assembly, and effectively protecting the safety of the circuit board assembly. Furthermore, the fixing connector 12 passes through the circuit board assembly and the housing 13 to be fixedly connected to the circuit board assembly and the housing 13, which can prevent the circuit board assembly from detaching from the housing 13 or shaking inside the housing 13, thereby making the battery management system operate more stably.

[0159] A third aspect of this application provides a battery including the battery management system proposed in the second embodiment of this application.

[0160] Other configurations and operations of the battery according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0161] According to the battery of the present utility model embodiment, by setting the battery management system of the second aspect embodiment above, the fixed connector connects the base and the housing to form an integral structure, thereby improving the strength of the housing. When the housing of the circuit board assembly is impacted due to transportation or drop, the base can absorb the impact force, improve the protective strength of the housing, minimize the force on the circuit board assembly, and effectively protect the safety of the circuit board assembly. In addition, the fixed connector passes through the circuit board assembly and the housing to be fixedly connected to the circuit board assembly and the housing, which can prevent the circuit board assembly from detaching from the housing or shaking inside the housing, thereby making the battery management system operate more stably.

[0162] The fourth aspect of this application provides an electrical device including a battery according to the embodiment of the third aspect of this application, the battery being used to provide electrical energy to the electrical device.

[0163] Other components and operations of the electrical equipment according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0164] According to the electrical device of this application, by setting the battery of the third aspect embodiment above, the fixing connector connects the base and the housing to form an integral structure, thereby improving the strength of the housing. When the housing of the circuit board assembly is impacted due to transportation or drop, the base can absorb the impact force, improving the protective strength of the housing, minimizing the force on the circuit board assembly, and effectively protecting the safety of the circuit board assembly. Furthermore, the fixing connector passes through the circuit board assembly and the housing to be fixedly connected to the circuit board assembly and the housing, which can prevent the circuit board assembly from detaching from the housing or shaking inside the housing, thereby making the battery management system operate more stably.

[0165] The fifth aspect of this application provides an energy storage device including a battery according to the third aspect of this application, the battery being used to provide electrical energy to the energy storage device.

[0166] According to the energy storage device of this application, by setting the battery of the third aspect embodiment above, the fixing connector connects the base and the housing to form an integral structure, thereby improving the strength of the housing. When the housing of the circuit board assembly is impacted due to transportation or drop, the base can absorb the impact force, improve the protective strength of the housing, minimize the force on the circuit board assembly, and effectively protect the safety of the circuit board assembly. Furthermore, the fixing connector passes through the circuit board assembly and the housing to fix and connect with the circuit board assembly and the housing, which can prevent the circuit board assembly from detaching from the housing or shaking inside the housing, thereby making the battery management system operate more stably.

[0167] Specifically, an energy storage device includes one or more battery clusters to enhance its voltage and capacity. A battery cluster may include multiple cells connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device. Each cell may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0168] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage devices provided in this application embodiment can be used in any power system that requires energy storage.

[0169] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0170] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0171] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0172] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery via piping to regulate the temperature of the individual battery cells.

[0173] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0174] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the device's current, voltage, power, state of charge, and temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0175] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage devices.

[0176] As an example, the power distribution unit can be used to distribute power to the power modules of energy storage devices.

[0177] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A protective enclosure for a battery management system, characterized by, The battery management system comprises a circuit board assembly, the protective shell comprises: a base; a fixed connecting piece, which is protrudingly arranged on the base along a first direction, the first direction being parallel to the thickness direction of the base; a shell, which is spaced apart from the base along the first direction, the shell being provided with a receiving cavity, the circuit board assembly being arranged in the receiving cavity, and the fixed connecting piece being arranged through the shell and the circuit board assembly to be fixedly connected with the shell and the circuit board assembly.

2. The protective case of claim 1, wherein, The shell comprises: a first cover, which is oppositely arranged with the base along the first direction; a second cover, which is movably arranged on the side of the first cover away from the base along the first direction, and which is cooperated with the first cover to form the receiving cavity.

3. The protective case of claim 2, wherein, The first cover comprises a first wall and a first side wall, the first wall being oppositely and parallelly arranged with the base, and the first side wall being arranged around the periphery of the first wall and being cooperated with the first wall to form a first accommodating groove with an opening facing the second cover, the circuit board assembly being at least partially arranged in the first accommodating groove, and the first wall being spaced apart from the circuit board assembly.

4. The protective case of claim 3, wherein, The first cover further comprises: a first reinforcing rib, which is arranged on the first side wall and protrudes toward the first accommodating groove relative to the first side wall; and / or a second reinforcing rib, which is arranged on the first wall and protrudes toward the base relative to the first wall.

5. The protective case of claim 4, wherein, The first reinforcing rib is a circular arc reinforcing rib, and the radius of curvature of the first reinforcing rib gradually increases in the direction of the second cover toward the first wall.

6. The protective case of claim 4, wherein, The first reinforcing rib comprises a plurality of first reinforcing ribs, and the plurality of first reinforcing ribs are arranged in the length direction of the first side wall.

7. The protective case of claim 3, wherein, The first cover further comprises: a first abutting wall, which is arranged on the side of the first side wall close to the second cover and is connected with the first side wall, the first abutting wall protruding away from the first accommodating groove relative to the first side wall, the first abutting wall being provided with a locking hole, and the fixed connecting piece being arranged through the locking hole to be fixedly connected with the first cover.

8. The protective case of claim 7, wherein, The circuit board assembly comprises a main board, the first abutting wall comprises a first surface, a second surface and a first step surface connected with the first surface and the second surface, the second surface being arranged close to the first wall along the first direction, the first surface, the second surface and the first step surface forming a first sink, and the main board being arranged in the first sink.

9. The protective case of claim 8, wherein, The distance between the first step surface and the main board is less than or equal to 0.5 mm.

10. The protective case of claim 3, wherein, The distance between the first wall and the circuit board assembly is greater than or equal to 4.5 mm.

11. The protective case of any one of claims 2-10, wherein, The second cover comprises a second wall and a second side wall, the second wall being oppositely and parallelly arranged with the base, and the second side wall being arranged around the periphery of the second wall and being cooperated with the second wall to form a second accommodating groove with an opening facing the first cover, the circuit board assembly being at least partially arranged in the second accommodating groove, and the second wall being spaced apart from the circuit board assembly.

12. The protective case of claim 11, wherein, The second cover further comprises: A third reinforcing rib, located on the second sidewall and protruding relative to the second sidewall toward the second receiving groove; and / or The fourth reinforcing rib is located on the second wall and protrudes from the second wall in a direction away from the base.

13. The protective case of claim 12, wherein, The third reinforcing rib is an arc-shaped reinforcing rib, and the radius of curvature of the third reinforcing rib gradually increases from the base toward the second wall.

14. The protective case of claim 13, wherein, The third reinforcing rib includes multiple ribs, which are arranged at intervals along the length of the second sidewall.

15. The protective case of claim 11, wherein, The second cover also includes: The second abutting wall is located on the side of the second side wall close to the first cover and is connected to the second side wall. The second abutting wall protrudes in a direction away from the second receiving groove relative to the second side wall. The second abutting wall is provided with a locking hole, and the fixing connector passes through the locking hole to be fixedly connected to the second cover.

16. The protective case of claim 15, wherein, The circuit board assembly includes a motherboard, the second abutment wall includes a third surface, a fourth surface and a second stepped surface connected to the third surface and the fourth surface, the fourth surface is disposed close to the second wall along a first direction, the third surface, the fourth surface and the second stepped surface form a second recessed platform, and the motherboard is mounted on the second recessed platform.

17. The protective case of claim 16, wherein, The distance between the second step surface and the main board is less than or equal to 0.5 mm.

18. The protective case of any one of claims 11-17, wherein, The distance between the second wall and the circuit board assembly is greater than or equal to 4.5 mm.

19. The protective case of any one of claims 2-18, wherein, The housing also includes: A folding connector, along a second direction, is located on one side of the first cover and connects the first cover and the second cover respectively, the second direction being parallel to the width direction of the base.

20. The protective case of claim 19, wherein, The folding connector has a first form and a second form. In the first form, the second cover is closed to the first cover. In the second form, the first cover is detached from the second cover. In the second form, the projection of the folding connector in the second direction is bow-shaped.

21. The protective case of claim 20, wherein, The folding connector has a slot.

22. The protective case of claim 19, wherein, Both the first cover and the second cover include a snap fastener. Along the second direction, the snap fastener is located on the side of the first cover and the second cover opposite to the folding connector, and the first cover and the second cover are connected by the snap fastener.

23. The protective case of claim 22, wherein, The buckle includes at least one of a circular buckle and a strip buckle.

24. The protective case of claim 23, wherein, The buckle includes the circular buckle and the strip buckle. Along a third direction, the circular buckle is located on both sides of the strip buckle, and the third direction is the length direction of the base.

25. The protective case of any one of claims 2-24, wherein, The fixing connector includes a press-fit nut and a locking screw. Along the first direction, one end of the press-fit nut is connected to the base, and the other end abuts against the housing. The locking screw passes through the housing and the circuit board assembly and is screwed to the press-fit nut.

26. The protective case of any one of claims 1-25, wherein, Along the first direction, the distance between the housing and the base is greater than or equal to 2 mm and less than or equal to 10 mm.

27. The protective case of any one of claims 1-26, wherein, The surface of the housing is coated with an antistatic coating.

28. A battery management system, comprising: Includes a circuit board assembly and a protective housing according to any one of claims 1-27.

29. A battery, characterized by Includes the battery management system as described in claim 28.

30. An electrical device, comprising: A battery as claimed in claim 29 for storing or providing electrical energy.

31. An energy storage device, comprising: A battery as claimed in claim 29 for storing or providing electrical energy.

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