Battery device and electric device

Abstract

The battery device comprises a battery monomer, a box body and a battery management assembly, the battery monomer is accommodated in the box body, the battery management assembly comprises a circuit board and a protection part, the circuit board is electrically connected with the battery monomer, the protection part comprises a shell and a mounting structure, and the shell is electrically connected with the protection part. The strength of the shell is smaller than that of the mounting structure, the circuit board is contained in the shell, the shell is connected with the box body through the mounting structure, the mounting structure comprises a bearing plate and supporting legs, each supporting leg comprises a spacing part and a fixing part, the fixing parts are connected with the bearing plate through the spacing parts, and the spacing parts are formed by extending the bearing plate in the direction away from the shell. According to the embodiment of the invention, the mounting structure with higher strength has better impact resistance and firstly bears impact from the box body, so that the transmission of the impact to the shell and the internal circuit board is reduced, the protection effect and stability of the circuit board are improved, and the parameter monitoring accuracy of the battery device is further improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] A battery management system is a core component in a battery device for real-time monitoring of key parameters of battery cells, and is one of the important components to ensure the safe operation of the battery device.

[0003] However, during the transportation or use of the battery device, when encountering bumps or other forms of impact, the precision electronic components of the battery management system are prone to anomalies under the impact, resulting in a decrease in the accuracy of battery parameter monitoring, and further affecting the use safety of the battery device. Summary of the Utility Model

[0004] The present application provides a battery device and an electrical device, which can protect the battery management component to improve the reliability of the battery device.

[0005] In a first aspect, the present application provides a battery device. The battery device includes battery cells, a box body, and a battery management component. The battery cells are housed in the box body. The battery management component includes a circuit board and a protection member. The circuit board is electrically connected to the battery cells. Among them, the protection member includes a housing and an installation structure. The strength of the housing is less than that of the installation structure. The circuit board is housed in the housing. The housing is connected to the box body through the installation structure. The installation structure includes a bearing plate and support legs. The support legs include a spacer portion and a fixing portion. The fixing portion is connected to the bearing plate through the spacer portion. The spacer portion extends from the bearing plate in a direction away from the housing.

[0006] In the battery device according to the embodiment of the present application, the protection member in the battery management component is divided into a housing and an installation structure. The housing can protect the internal circuit board to reduce the intrusion of impurities such as dust and moisture into the circuit board. At the same time, the housing is connected to the box body through the installation structure with greater strength. As the receptor connected to the box body and first bearing the impact, the installation structure has better impact resistance. When the battery device as a whole encounters impact, the installation structure with greater strength can withstand more impact to reduce the impact force transmitted to the housing and the internal circuit board, improve the protection effect of the circuit board to enable the normal operation of the parameter monitoring of the battery cells, and improve the use safety of the battery device. And, the protection member can be installed on the box body through the fixing portion and spaced apart from the box body through the spacer portion of the support legs, and further reduce the impact transmitted from the box body to the protection member by restricting the direct contact between the bearing plate and the box body.

[0007] In some alternative embodiments, the weight of the installation structure is greater than the total weight of the housing and the circuit board, and the housing is disposed above the installation structure.

[0008] In the above optional embodiments, when the battery management component falls off under impact, the heavier mounting structure can land first, and the housing arranged above can still be spaced apart from the ground through the mounting structure, so as to reduce the probability of the housing with lower strength and the internal circuit board being damaged by impact.

[0009] In some optional embodiments, the carrier plate includes a plate body and a recess recessed relative to the plate body. The housing is detachably connected to the plate body and partially accommodated in the recess. Along the extending direction of the spacer, the size of the recess is smaller than that of the spacer.

[0010] In the above optional embodiments, on the one hand, the recess and the support feet are arranged on the same side of the plate body to reduce the occupied space of the battery management component and improve the integration and energy density of the battery device; on the other hand, the distance between the recess and the box body is smaller than the size of the spacer, so that the recess will not contact the box body when the battery management component is connected to the box body, and the impact force transmitted from the box body to the recess, the housing and the internal circuit board is reduced.

[0011] In some optional embodiments, the housing includes a folding portion and a first housing and a second housing respectively arranged on both sides of the folding portion. The first housing is connected to the mounting structure, and the first housing and the second housing are connected through the folding portion so that the first housing and the second housing can cover each other.

[0012] In the above optional embodiments, the first housing and the second housing are connected through the folding portion, can be folded and covered and can remain connected in the open state. The first housing, the second housing and the folding portion can be integrally formed to reduce the processing difficulty.

[0013] In some optional embodiments, the strength of both the first housing and the second housing is greater than that of the folding portion.

[0014] In the above optional embodiments, the folding portion can be deformed preferentially to complete the mutual closing or mutual opening of the first housing and the second housing.

[0015] In some optional embodiments, the toughness of both the first housing and the second housing is less than that of the folding portion.

[0016] In the above optional embodiments, the folding portion that is repeatedly deformed during the opening and closing process is not likely to break, so as to maintain the normal use of the housing.

[0017] In some optional embodiments, the first housing includes a first bottom wall and a first side wall surrounding the first bottom wall. The first bottom wall is formed with a first reinforcing structure extending away from the circuit board, and the first reinforcing structure is arranged in an array on the first bottom wall.

[0018] In the above-mentioned optional embodiments, the circuit board is at least partially received in the first housing and then received in the mounting structure, improving the protection effect. Moreover, the bottom wall of the first housing protrudes relative to the first reinforcing structure to form an energy absorption effect, thereby reducing the probability of damage to the circuit board when it is impacted by the outside world.

[0019] In some optional embodiments, a second reinforcing structure extending away from the circuit board is formed on the side wall of the first housing, and the second reinforcing structures are arranged at equal intervals along the circumferential direction of the bottom wall of the first housing.

[0020] In the above-mentioned optional embodiments, the multiple second reinforcing structures arranged along the circumferential direction of the side wall of the first housing can form an energy absorption effect in all directions on the side of the circuit board, further reducing the probability of damage to the circuit board when it is impacted by the outside world.

[0021] In some optional embodiments, the folding portion includes a weak structure, and the weak structure is arranged at the middle position of the folding portion along the direction from the first housing to the second housing.

[0022] In the above-mentioned optional embodiments, when the first housing and the second housing need to be closed, the weak structure can deform earlier than other areas of the folding portion, so that the first housing and the second housing can flip around the weak structure and approach each other to complete the closing.

[0023] In some optional embodiments, a first groove is formed on the side of the weak structure facing away from the circuit board, and the first groove runs through along the length direction of the folding portion.

[0024] In the above-mentioned optional embodiments, by setting the first groove, the strength of the weak structure is less than that of other areas of the folding portion, so that it can deform preferentially when folding is required to complete the closing.

[0025] In some optional embodiments, a second groove is further formed in the weak structure, and the second groove runs through along the thickness direction of the weak structure.

[0026] In the above-mentioned optional embodiments, a through second groove is formed in the weak structure in its own thickness direction to further reduce the strength of the weak structure, making it easier for the outer shell to be folded and closed.

[0027] In some optional embodiments, the folding portion further recesses away from the circuit board to form a buffer structure, and buffer structures are provided between the weak structure and the first housing and between the weak structure and the second housing.

[0028] In the above-mentioned optional embodiments, the buffer structure can optimize the stress distribution of the folded folding portion, making the folding portion have stronger deformation ability, thereby improving the fitting degree between the first housing and the second housing.

[0029] In some alternative embodiments, one of the first housing and the second housing is provided with a first buckle and the other is provided with a second buckle, and the first housing and the second housing are connected by snap-fitting.

[0030] In the above alternative embodiments, the outer shell is convenient for switching between the opened and closed states and can improve the closing stability of the first housing and the second housing through the cooperation of the first buckle and the second buckle.

[0031] In a second aspect, the present application provides an electrical device, the electrical device including the battery device provided in any of the embodiments of the first aspect, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings.

[0033] Figure 1 Schematic structural diagram of an electrical device according to an embodiment of the present application;

[0034] Figure 2 Schematic structural diagram of a battery device according to an embodiment of the present application;

[0035] Figure 3 Schematic connection diagram of a battery cell group according to an embodiment of the present application;

[0036] Figure 4 Schematic structural diagram of a battery management component according to an embodiment of the present application;

[0037] Figure 5 Schematic structural diagram of an installation structure according to an embodiment of the present application;

[0038] Figure 6 Schematic perspective view of an outer shell according to an embodiment of the present application;

[0039] Figure 7 For Figure 6 The first perspective view of the shown outer shell;

[0040] Figure 8 For Figure 7 The enlarged view of part A in;

[0041] Figure 9 For Figure 6 The second perspective view of the shown outer shell;

[0042] Figure 10 For Figure 9 The enlarged view of part B in.

[0043] In the drawings, the drawings are not necessarily drawn to actual scale.

[0044] The specific mark information in the drawings is as follows:

[0045] 1000, vehicle;

[0046] 100, battery device; 200, controller; 300, motor;

[0047] 10, box body; 11, first box body part; 12, second box body part;

[0048] 20, battery cell group; 21, battery cell;

[0049] 310, mounting structure; 311, bearing plate; 3111, plate body; 3112, recess; 312, support leg; 3121, spacing part; 3122, fixing part;

[0050] 320, housing; 321, first housing; 3211, first housing bottom wall; 3212, first reinforcing structure; 3213, first housing side wall; 3214, second reinforcing structure; 3215, first buckle; 322, second housing; 3221, second housing bottom wall; 3222, third reinforcing structure; 3223, second housing side wall; 3224, fourth reinforcing structure; 3225, second buckle; 323, folding part; 3231, first groove; 3232, second groove; 3233, buffer structure. Detailed implementation manners

[0051] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0054] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0056] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0057] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of this application.

[0058] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0059] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of battery devices, the market demand is also constantly increasing.

[0060] A battery management system (BMS) is provided in the battery device. By monitoring the operating parameters such as the voltage, temperature, and current of individual battery cells, the battery management system ensures the safe use of the battery device during charging and discharging. The battery management system includes a circuit board integrated with multiple modules.

[0061] However, in scenarios such as electric vehicles and energy storage systems, the circuit board needs to withstand mechanical stresses such as vibration and shock, resulting in damage such as solder joint cracking and component detachment, which in turn affects the normal use of the circuit board, leading to a decrease in the accuracy of battery parameter monitoring or even the inability to monitor, greatly affecting the use safety of the battery device.

[0062] In response to this, the battery device protects the circuit board through structural design or by providing an additional protective case. However, the anti-shock design of the circuit board remains one of the issues that need continuous improvement in the battery device.

[0063] In view of the above problems, the inventor designed a battery device that separates the circuit board from the box body and reduces the transmission of external shocks to the circuit board through hierarchical protection of the circuit board, forming a better protection effect on the circuit board to improve the reliability of the battery device.

[0064] The technical solutions described in the embodiments of the present application are applicable not only to battery devices but also to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery-powered vehicles, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0065] For the convenience of description in the following embodiments, a vehicle 1000 in an embodiment of the present application is taken as an example for illustration.

[0066] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0067] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] Please refer to Figure 2 , Figure 2 which is an exploded structural schematic diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell group 20, and the battery cell group 20 is accommodated in the box body 10.

[0069] The box body 10 is used to accommodate battery cells, and the box body 10 can have various structures. In some embodiments, the box body 10 can include a first box body part 11 and a second box body part 12. The first box body part 11 and the second box body part 12 cover each other, and the first box body part 11 and the second box body part 12 together define an accommodating part for accommodating the battery cell group 20. The second box body part 12 can be a hollow structure with one end open, and the first box body part 11 is a plate-like structure. The first box body part 11 covers the open side of the second box body part 12 to form the box body 10 with an accommodating part; the first box body part 11 and the second box body part 12 can also both be hollow structures with one side open, and the open side of the first box body part 11 covers the open side of the second box body part 12 to form the box body 10 with an accommodating part. Of course, the first box body part 11 and the second box body part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0070] As an example, the battery cell group 20 can be a battery module, and the battery cell group 20 can be accommodated in the box body by fixing the battery module in the box body.

[0071] As an example, the battery cell group 20 can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0072] In some embodiments, the box body can be part of the chassis structure of the vehicle 1000. For example, a part of the box body can become at least a part of the floor of the vehicle 1000, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0073] In some embodiments, the battery device 100 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electric cabinet, etc.

[0074] Please refer to Figure 3 , Figure 3 which is a structural schematic diagram of a battery cell group 20 provided in an embodiment of the present application. The battery cell group 20 includes a plurality of battery cells 21. The plurality of battery cells 21 are first connected in series or in parallel or in a hybrid connection to form the battery cell group 20, and then the battery cell group 20 is accommodated in the box body.

[0075] In the embodiments of the present application, the battery cell 21 may be a secondary battery, which refers to a battery cell 21 that can be activated by charging after discharging to continue to be used.

[0076] The battery cell 21 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0077] As an example, the battery cell 21 may be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell or a battery cell 21 with other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc. The present application has no special limitation.

[0078] First, the battery device provided by the embodiments of the present application will be introduced below. Please also refer to Figures 4 to 10 , Figure 4 which is a schematic structural diagram of a battery management component according to an embodiment of the present application; Figure 5 which is a schematic structural diagram of an installation structure according to an embodiment of the present application; Figure 6 which is a three-dimensional structural diagram of a housing according to an embodiment of the present application; Figure 7 is Figure 6 a first perspective view of the housing shown in Figure 8 is Figure 7 an enlarged view of part A in Figure 9 is Figure 6 a second perspective view of the housing shown in Figure 10 is Figure 9 an enlarged view of part B in

[0079] In a first aspect, the embodiments of the present application provide a battery device. The battery device includes a battery cell, a box body and a battery management component. The battery cell is housed in the box body. The battery management component includes a circuit board and a protection member. The circuit board is electrically connected to the battery cell. Among them, the protection member includes a housing 320 and an installation structure 310. The strength of the housing 320 is less than that of the installation structure 310. The circuit board is housed in the housing 320. The housing 320 is connected to the box body through the installation structure 310. The installation structure 310 includes a carrier plate 311 and support legs 312. The housing 320 is connected to the carrier plate 311. The support legs 312 include a spacer portion 3121 and a fixing portion 3122. The fixing portion 3122 is connected to the carrier plate 311 through the spacer portion 3121. The spacer portion 3121 extends from the carrier plate 311 in a direction away from the housing 320.

[0080] It can be understood that the circuit board is electrically connected to the battery cell and is used to arrange at least one component. Multiple components can realize functions such as data acquisition, control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell, and can intelligently manage and maintain multiple battery cells, which is beneficial to improving the performance and service life of the battery. In some embodiments, the circuit board may include a printed circuit board, on which multiple lines connected to the components are arranged. In some embodiments, the circuit board may include a flexible circuit board, and multiple lines arranged in the flexible circuit board are connected to the components.

[0081] Optionally, the material strength of the housing 320 is less than that of the mounting structure 310. Exemplarily, the housing 320 is a plastic part, and the mounting structure 310 is a metal part.

[0082] Optionally, the rigidity of the housing 320 is less than that of the mounting structure 310, or the elasticity of the housing 320 is greater than that of the mounting structure 310.

[0083] Optionally, the structural strength of the housing 320 is less than that of the mounting structure 310 to avoid the situation where the mounting structure 310 is damaged first and the exposed housing 320 therein causes damage to the housing 320 and the circuit board.

[0084] Optionally, the fixing part 3122 can be connected to the box body through bolts or other connectors, and together with the spacer part 3121, it extends the path for the impact to be transmitted to the bearing plate 311 and the housing 320, better protecting the circuit board.

[0085] Thus, the battery device provided by the embodiment of the present application protects the circuit board through the protection member, and the protection member is divided into the housing 320 and the mounting structure 310. Among them, the housing 320 is used to enclose the circuit board to reduce the intrusion of impurities such as dust and water vapor into the circuit board, and the mounting structure 310 with greater strength is used to realize the connection between the housing 320 and the box body. The bearing plate 311 for mounting the housing 320 is spaced apart from the box body through the support feet 312 to avoid the vibration impact of the box body being directly transmitted to the housing 320 and the circuit board inside it through the bearing plate 311.

[0086] It can be understood that when the battery device as a whole encounters an external impact, the mounting structure 310 directly connected to the box body, as the first receptor to bear the impact, has a better ability to resist impact. Moreover, the mounting structure 310 with greater strength is not easily deformed under the impact and does not form extrusion on the housing 320 to cause damage to the internal circuit board. The mounting structure 310 can bear more impacts to reduce the impact force further transmitted to the housing 320, thereby reducing the impact received by the internal circuit board. Therefore, the battery device can stably monitor the target operating parameters of the battery cell and make timely responses or adjustments, thereby improving the use safety and reliability of the battery device.

[0087] According to some embodiments of the present application, the weight of the mounting structure 310 is greater than the total weight of the housing 320 and the circuit board.

[0088] Thus, when the battery management component falls off the box under the impact, the heavier mounting structure 310 can land first, reducing the probability that the relatively fragile housing 320 lands directly and causes the internal circuit board to be damaged by the impact.

[0089] According to some embodiments of the present application, the carrier plate 311 includes a plate body 3111 and a recess 3112 that is recessed relative to the plate body 3111. The housing 320 is connected to the plate body 3111, and the housing 320 is partially received in the recess 3112.

[0090] Optionally, the circuit board is completely received in the recess 3112 to reduce the occupied space of the battery management component in the direction in which the recess 3112 is recessed; alternatively, the circuit board is partially received in the recess 3112.

[0091] Optionally, the housing 320 is detachably connected to the plate body 3111. Exemplarily, the housing 320 and the plate body 3111 are fixedly connected by bolts and nuts.

[0092] Optionally, along the extension direction of the spacer portion 3121, the size of the recess 3112 is smaller than the size of the spacer portion 3121 to prevent the recess 3112 from directly contacting the box.

[0093] Thus, the recess 3112 and the support feet 312 are provided on the same side of the plate body 3111 so that the housing 320 and the carrier plate 311 share a partial space, reducing the occupied space of the battery management component inside the box.

[0094] According to some embodiments of the present application, the housing 320 includes a first housing 321 and a second housing 322, and the first housing 321 and the second housing 322 can approach or move away from each other to achieve the closing or opening of the housing 320.

[0095] Optionally, both the first housing 321 and the second housing 322 are formed with cavities for receiving the circuit board, or the first housing 321 is formed with a cavity for receiving the circuit board, and the second housing 322 is used to close and seal the first housing 321.

[0096] Optionally, the housing 320 further includes a folding portion 323. The first housing 321 and the second housing 322 are respectively disposed on two sides of the folding portion 323, and the first housing 321 and the second housing 322 are connected through the folding portion 323. Exemplarily, the first housing 321, the second housing 322 and the folding portion 323 are of an integral structure. For example, the first housing 321, the second housing 322, that is, the folding portion 323 can be formed in one step by processes such as stamping or folding.

[0097] Optionally, the housing 320 further includes a hinge member. The first housing 321 and the second housing 322 are connected through the hinge member to realize the opening or closing of the housing 320.

[0098] Optionally, the first housing 321 and the second housing 322 are connected by a threaded connector or other separable connectors to meet the requirement that the first housing 321 and the second housing 322 approach or move away from each other.

[0099] Thus, the first housing 321 can cooperate with the second housing 322 to isolate the circuit board and prevent impurities such as water vapor and dust from invading the circuit board.

[0100] According to some embodiments of the present application, the strength of both the first housing 321 and the second housing 322 is greater than the strength of the folding portion 323, so that the folding portion 323 with the lowest strength during the folding action can be preferentially deformed, thereby the first housing 321 and the second housing 322 approach each other to complete the closing, reducing the possible deformation amount of the first housing 321 and the second housing 322.

[0101] Optionally, the strength of the second housing 322 is greater than the strength of the first housing 321, and the strength of the first housing 321 is greater than the strength of the folding portion 323. Thus, compared with the first housing 321 protected in the recess 3112, the second housing 322 exposed to the mounting structure 310 can better resist external impacts.

[0102] Further optionally, the structural strength of the second housing 322 is greater than the structural strength of the first housing 321, or the material strength of the second housing 322 is greater than the material strength of the first housing 321.

[0103] Optionally, the strength of the second housing 322 is equal to the strength of the first housing 321, or the strength of the second housing 322 is less than the strength of the first housing 321.

[0104] According to some embodiments of the present application, the toughness of both the first housing 321 and the second housing 322 is less than the toughness of the folding portion 323. Since the folding portion 323 is the main deformation region during the folding process, the folding portion 323 with better toughness can withstand more folding and opening / closing actions.

[0105] According to some embodiments of the present application, the first housing 321 includes a first housing bottom wall 3211 and a first housing side wall 3213 disposed around the first housing bottom wall 3211. The first housing bottom wall 3211 is formed with a first reinforcing structure 3212 extending away from the circuit board.

[0106] It can be understood that the first housing side wall 3213 refers to a structure disposed along the circumferential direction of the first housing bottom wall 3211 and used to protect the side portion of the circuit board, including a pair of first short sides disposed parallel to each other and a pair of first long sides disposed parallel to each other, where the size of the first short side may also be equal to the size of the first long side.

[0107] Optionally, the first reinforcing structures 3212 are arranged in an array on the first housing bottom wall 3211. Exemplarily, the first reinforcing structures 3212 are arranged in a rectangular array.

[0108] Optionally, please refer to Figure 9 , the first reinforcing structures 3212 are arranged in a reinforcing rib structure with multiple horizontal and vertical intersections, and the reinforcing rib structure can be formed together with the first housing bottom wall 3211 during stamping or blow molding.

[0109] Optionally, a foam or other energy-absorbing member is further provided between the first housing bottom wall 3211 and the circuit board.

[0110] Optionally, the first housing bottom wall 3211 is further formed with an avoidance portion for accommodating components.

[0111] Thus, when the impact received by the carrier plate 311 is transmitted to the first housing 321, the recess 3112 of the carrier plate 311 preferentially contacts the first reinforcing structure 3212 and then is transmitted to the circuit board through the first reinforcing structure 3212 and the first housing bottom wall 3211 in sequence, extending the impact transmission path and thus reducing the possible damage to the circuit board.

[0112] According to some embodiments of the present application, the first housing side wall 3213 is formed with a second reinforcing structure 3214 extending away from the circuit board.

[0113] Optionally, a plurality of second reinforcing structures 3214 are provided, and along the circumferential direction of the first housing bottom wall 3211, the plurality of second reinforcing structures 3214 are spaced apart.

[0114] Further optionally, along the circumferential direction of the first housing bottom wall 3211, the plurality of second reinforcing structures 3214 are equally spaced.

[0115] Optionally, a foam or other energy-absorbing member is further provided between the first housing side wall 3213 and the circuit board to further protect the circuit board.

[0116] Thus, when the impact received by the carrier plate 311 is transmitted to the first housing 321, the concave portion 3112 of the carrier plate 311 preferentially contacts the second reinforcing structure 3214 and is then transmitted to the circuit board through the second reinforcing structure 3214 and the first housing side wall 3213 in sequence, reducing the possible damage to the side of the circuit board.

[0117] According to some embodiments of the present application, the second housing 322 includes a second housing bottom wall 3221 and a second housing side wall 3223 disposed around the second housing bottom wall 3221, and a third reinforcing structure 3222 extending away from the circuit board is formed on the second housing bottom wall 3221.

[0118] It can be understood that the second housing side wall 3223 refers to a structure disposed along the circumferential direction of the second housing bottom wall 3221 and used to protect the side portion of the circuit board, including a pair of second short sides arranged in parallel with each other and a pair of second long sides arranged in parallel with each other, and the size of the second short side may also be equal to the size of the second long side.

[0119] Optionally, the third reinforcing structures 3222 are arranged in an array on the second housing bottom wall 3221. Exemplarily, the third reinforcing structures 3222 are arranged in a rectangular array.

[0120] Further optionally, the density of the third reinforcing structures 3222 is less than the density of the first reinforcing structure 3212, so that the protection effect of the second housing 322 is better than the protection effect of the first housing 321 disposed in the concave portion 3112.

[0121] Optionally, please refer to Figure 9 , the third reinforcing structure 3222 is arranged in a reinforcing rib structure with multiple horizontal and vertical intersections, and the reinforcing rib structure can be formed together with the second housing bottom wall 3221 during stamping or blow molding.

[0122] Optionally, a foam or other energy-absorbing member is further provided between the second housing bottom wall 3221 and the circuit board.

[0123] Optionally, the second housing bottom wall 3221 further forms an avoidance portion for accommodating components.

[0124] Thus, when the impact received by the carrier plate 311 is transmitted to the second housing 322, the concave portion 3112 of the carrier plate 311 preferentially contacts the third reinforcing structure 3222 and is then transmitted to the circuit board through the third reinforcing structure 3222 and the second housing bottom wall 3221 in sequence, extending the transmission path of the impact and thus reducing the possible damage to the circuit board.

[0125] According to some embodiments of the present application, a fourth reinforcing structure 3224 extending away from the circuit board is formed on the second housing side wall 3223.

[0126] Optionally, a plurality of fourth reinforcing structures 3224 are provided, and the plurality of fourth reinforcing structures 3224 are spaced apart along the circumferential direction of the second housing bottom wall 3221.

[0127] Further optionally, the plurality of fourth reinforcing structures 3224 are equidistantly arranged along the circumferential direction of the second housing bottom wall 3221.

[0128] Further optionally, the density of the fourth reinforcing structure 3224 is less than the density of the second reinforcing structure 3214.

[0129] Optionally, a foam or other energy-absorbing member is further provided between the second housing side wall 3223 and the circuit board to further protect the circuit board.

[0130] Thus, when the impact received by the carrier plate 311 is transmitted to the second housing 322, the concave portion 3112 of the carrier plate 311 preferentially contacts the fourth reinforcing structure 3224 and then is transmitted to the circuit board through the fourth reinforcing structure 3224 and the second housing side wall 3223 in sequence, reducing the possible damage to the side of the circuit board.

[0131] According to some embodiments of the present application, the folding portion 323 includes a weak structure. When the first housing 321 and the second housing 322 can deform more easily relative to other regions of the folding portion 323, the first housing 321 and the second housing 322 are reversely opened and closed with the weak structure as the axis.

[0132] Optionally, the weak structure is disposed at the middle position of the folding portion 323 along the direction from the first housing 321 to the second housing 322.

[0133] Optionally, the material strength of the weak structure is less than the material strength of other regions of the folding portion 323.

[0134] According to some embodiments of the present application, a first groove 3231 is formed on the side of the weak structure facing away from the circuit board, so that the weak structure can be more easily driven to deform to complete the folding of the first housing 321 and the second housing 322.

[0135] Optionally, the first groove 3231 extends along the length direction of the weak structure.

[0136] Further optionally, the first groove 3231 extends through along the length direction of the weak structure.

[0137] According to some embodiments of the present application, a second groove 3232 is further formed in the weak structure, and the second groove 3232 extends along the thickness direction of the weak structure.

[0138] Optionally, the second groove 3232 extends through along the thickness direction of the weak structure.

[0139] Optionally, a plurality of second slots 3232 are provided, and the plurality of second slots 3232 are spaced along the length direction of the weak structure.

[0140] Further optionally, the width of the second slot 3232 is greater than or equal to 0.5 mm and less than or equal to 2 mm. Exemplarily, the width of the second slot 3232 is 1.2 mm.

[0141] Further optionally, the length of the second slot 3232 is greater than or equal to 5 mm and less than or equal to 20 mm. Exemplarily, the length of the second slot 3232 is 10 mm.

[0142] Thus, the second slot 3232 can further reduce the strength of the weak structure so that the first housing 321 and the second housing 322 can be more easily snapped together.

[0143] According to some embodiments of the present application, the folding portion 323 further recesses away from the circuit board to form a buffer structure 3233. A buffer structure 3233 is provided between the weak structure and the first housing 321, and a buffer structure 3233 is provided between the weak structure and the second structure.

[0144] Optionally, the buffer structure 3233 is provided to penetrate along the length direction of the weak structure.

[0145] Thus, the recessed buffer structure 3233 can provide more deformation space during folding to optimize the stress distribution of the folding portion 323, improve the fitting degree between the first housing 321 and the second housing 322, and reduce the penetration of impurities.

[0146] According to some embodiments of the present application, one of the first housing 321 and the second housing 322 is provided with a first snap 3215 and the other is provided with a second snap 3225, and the first housing 321 and the second housing 322 are snap-connected.

[0147] Optionally, the first snap 3215 and the second snap 3225 are provided in the form of a male snap and a female snap and are snapped together by pressing.

[0148] Optionally, the first snap 3215 is provided on the first housing 321 and the first snap 3215 is spaced from the edge of the first housing 321 by a preset distance. Exemplarily, the preset distance is 5 mm.

[0149] Optionally, the first housing 321 and the second housing 322 are further respectively provided with threaded connection holes to improve the fastening degree of the snap connection.

[0150] Further optionally, the mounting structure 310 is correspondingly provided with threaded connection holes to connect the first housing 321 and the second housing 322 after snap connection.

[0151] Thus, it is convenient to cover or open the housing 320.

[0152] According to some embodiments of the present application, the battery management component further includes an anti-static layer disposed on the side of the housing 320 facing the circuit board. The anti-static layer can reduce the static shock that may be generated inside the housing 320 to improve the installation environment of the circuit board.

[0153] Optionally, the anti-static layer is formed by processes such as film coating or spraying so as to cover the surface of the housing 320 facing the circuit board.

[0154] Further optionally, the thickness of the anti-static layer is greater than or equal to 0.3 mm and less than or equal to 1 mm.

[0155] In a second aspect, an electrical device provided by an embodiment of the present application includes the battery device provided by any one of the embodiments of the first aspect. The battery device is used to provide electrical energy. The electrical device has all the beneficial effects of the battery device.

[0156] An embodiment of the present application provides a battery device, including battery cells, a box body, and a battery management component. The battery cells are housed in the box body. The battery management component includes a protection member and a circuit board housed in the protection member. The circuit board is connected to the battery cells to obtain the operating parameters of the battery cells.

[0157] Please refer to Figure 4 , the protection member includes a housing 320 and a mounting structure 310. The housing 320 is a plastic suction molding, and the mounting structure 310 is a sheet metal part. The housing 320 and the mounting structure 310 are connected by bolts, and the mounting structure 310 is mounted in the box body by bolts.

[0158] Please refer to Figure 5 , the mounting structure 310 includes a bearing plate 311 and support feet 312. The bearing plate 311 is spaced from the box body by the support feet 312. The bearing plate 311 is formed with a recess 3112 for accommodating the housing 320 to reduce the occupied space of the protection member. Moreover, the maximum depth of the recess 3112 is less than the height of the spacing portion 3121 of the support feet 312 to ensure that the recess 3112 does not come into direct contact with the box body.

[0159] Please refer to Figure 6 , the housing 320 includes a first housing 321, a second housing 322, and a folding portion 323. The first housing 321 and the second housing 322 are connected by the folding portion 323 and are turned over around the folding portion 323 to realize the closing or opening of the housing 320. Among them, the first housing 321, the second housing 322, and the folding portion 323 are integrally formed by plastic suction molding.

[0160] Please refer to Figure 8 and Figure 10, the folding portion 323 is provided with a first groove 3231 and a second groove 3232 to form a weak structure, and the weak structure can preferentially deform during folding to achieve the positioning of the folding axis, facilitating the covering of the first housing 321 and the second housing 322 in a specified posture. Among them, the first groove 3231 is formed through along the length direction of the weak structure, and the second groove 3232 is formed through along the thickness direction of the weak structure.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, in which the battery cells are accommodated; A battery management assembly, comprising a circuit board and a protective member, wherein the circuit board is electrically connected to the battery cell; Wherein, the protective component includes an outer shell and a mounting structure, the strength of the outer shell is less than the strength of the mounting structure, the circuit board is accommodated in the outer shell, the outer shell is connected to the box body through the mounting structure, the mounting structure includes a supporting plate and a support foot, the support foot includes a spacer and a fixing part, the fixing part is connected to the supporting plate through the spacer, and the spacer is formed by the supporting plate extending in a direction away from the outer shell.

2. The battery device according to claim 1, characterized in that: The weight of the mounting structure is greater than the total weight of the housing and the circuit board, and the housing is arranged above the mounting structure.

3. The battery device according to claim 2, characterized in that: The supporting plate includes a plate body and a recessed portion recessed relative to the plate body. The shell is detachably connected to the plate body and partially accommodated in the recess. Along the extension direction of the spacer, the size of the recess is smaller than the size of the spacer.

4. The battery device according to claim 1, characterized in that: The shell includes a folding portion and a first shell and a second shell respectively arranged on both sides of the folding portion, the first shell is connected to the mounting structure, and the first shell and the second shell are connected through the folding portion so that the first shell and the second shell can cover each other.

5. The battery device according to claim 4, characterized in that: The strength of the first shell and the second shell is greater than the strength of the folded portion, and / or the toughness of the first shell and the second shell is less than the toughness of the folded portion.

6. The battery device according to claim 4, characterized in that: The first shell includes a first shell bottom wall and a first shell side wall arranged around the first shell bottom wall. The first shell bottom wall is formed with a first reinforcement structure extending away from the circuit board. The first reinforcement structure array is arranged on the first shell bottom wall.

7. The battery device according to claim 6, characterized in that: The first shell side wall is formed with a second reinforcement structure extending away from the circuit board, and the second reinforcement structures are arranged at equal intervals along the circumference direction of the first shell bottom wall.

8. The battery device according to claim 4, characterized in that: The folding portion includes a weak structure, and the weak structure is arranged at a middle position of the folding portion along a direction from the first shell to the second shell.

9. The battery device according to claim 8, characterized in that: A first groove is formed on a side of the weak structure facing away from the circuit board, and the first groove is arranged to penetrate along the length direction of the folded portion.

10. The battery device according to claim 9, characterized in that: The weak structure is further formed with a second groove, and the second groove is arranged through the weak structure in the thickness direction.

11. The battery device according to claim 8, characterized in that: The folded portion is also recessed in a direction away from the circuit board to form a buffer structure. The buffer structure is provided between the weak structure and the first shell, and the buffer structure is provided between the weak structure and the second shell.

12. The battery device according to claim 4, characterized in that: One of the first shell and the second shell is provided with a first buckle and the other is provided with a second buckle, and the first shell and the second shell are connected by snapping.

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

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