Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises a box body, a single battery, an end plate and a circuit board, the box body is provided with a containing cavity, the single battery is arranged in the containing cavity, the end plate is arranged on the side face, in the first direction, of the single battery, the circuit board is electrically connected with the single battery, and the end, facing the end plate, of the circuit board is arranged on the end plate; the circuit board can move in the first direction relative to the end plate. According to the scheme provided by the invention, the circuit board can move relative to the end plate along the stacking arrangement direction of the battery monomers, so that when the battery monomers expand along the stacking arrangement direction, although the end plate moves along the stacking arrangement direction under the action of the battery monomers, the whole circuit board does not move relative to the battery monomers; therefore, the circuit board does not need to be designed with extra redundant absorption expansion, so that the space of the accommodating cavity is saved, and the interference and warping risks are reduced.

Description

Technical Field

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

[0002] In a battery module, a flexible printed circuit board (FPC) is usually used to collect voltage and temperature signals.

[0003] When the FPC in the related art is in use, there are redundant parts, which are easy to interfere with other components. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can solve the problem that when the FPC is in use, there are redundant parts and it is easy to interfere with other components.

[0005] In order to solve the above technical problems, in a first aspect, the present application proposes a battery device, comprising:

[0006] A box body having a containing cavity;

[0007] Battery cells, the battery cells are stacked and arranged in the accommodating cavity along a first direction;

[0008] An end plate, the end plate being arranged on a side surface of the battery cell along a first direction;

[0009] A circuit board is electrically connected to the battery cell, one end of the circuit board facing the end plate is arranged on the end plate, and the circuit board can move relative to the end plate along the first direction.

[0010] In the technical solution of the embodiment of the present application, since the circuit board can move relative to the end plate along the stacking direction of the battery cells, when the battery cells expand, although the end plate will move along the stacking direction under the action of the battery cells, the circuit board as a whole will not move relative to the battery cells, that is, it will not affect the circuit board. In this way, the circuit board does not need to be designed with additional redundancy to absorb expansion, thereby saving space in the accommodating cavity and reducing the risk of interference and warping.

[0011] In some embodiments, the battery device further includes a first fixing assembly, the first fixing assembly including a fixing plate and a first limiting portion;

[0012] The fixing plate is arranged on the end plate, and a side of the fixing plate facing away from the end plate is connected to the first limiting portion;

[0013] The end of the circuit board facing the end plate is located between the fixing plate and the first limiting portion, the circuit board can move relative to the first limiting portion along the first direction, and the end of the circuit board facing the end plate is blocked from moving along the height direction of the battery cell. In this way, it is convenient to fix the circuit board on the end plate.

[0014] In some embodiments, two first limiting portions are disposed on a side of the fixing plate away from the end plate, and the two first limiting portions are spaced apart and distributed along the second direction;

[0015] The end of the circuit board facing the end plate is located between the two first limiting portions, wherein the second direction intersects with the first direction. In this way, the position of the circuit board in the second direction is limited by the two first limiting portions, so that the circuit board can be stably connected to the end plate.

[0016] In some embodiments, the distance between the two first limiting portions is greater than the maximum dimension of the circuit board along the second direction. In this way, the circuit board can be moved between the two first limiting portions, so as to facilitate adjusting the position of the circuit board in the second direction.

[0017] In some embodiments, the battery device further includes a second fixing assembly, wherein the second fixing assembly includes a fixing plate and a second limiting portion;

[0018] The fixing plate is arranged on the end plate, a side of the fixing plate facing away from the end plate is connected to the second limiting portion, and a side of the second limiting portion facing the fixing plate is provided with a protrusion;

[0019] A groove is arranged at one end of the circuit board facing the end plate, the groove cooperates with the protrusion, and the groove can move relative to the protrusion along the first direction, so that the circuit board can be conveniently fixed on the end plate.

[0020] In some embodiments, two second position-limiting portions are provided on a side of the fixing plate away from the end plate, the two second position-limiting portions are spaced apart along the second direction, and a protrusion is provided on a side of each second position-limiting portion facing the fixing plate;

[0021] The circuit board is provided with two grooves at one end facing the end plate, the grooves cooperate with the protrusions, and the second direction intersects with the second direction. In this way, the circuit board can be stably connected to the end plate by correspondingly setting the two protrusions in the two grooves.

[0022] In some embodiments, the distance between the two second limiting portions is greater than the maximum dimension of the circuit board along the second direction. In this way, the circuit board can be moved between the two second limiting portions, so as to facilitate adjustment of the position of the circuit board in the second direction.

[0023] In some embodiments, the battery device further comprises a fastener, and the fixing plate is connected to the end plate via the fastener, so that it is convenient to fix the fixing plate to the end plate.

[0024] In some embodiments, the battery device further comprises a detection element, and the detection element is electrically connected to the circuit board, so as to facilitate detection of the temperature of the battery cell.

[0025] In some embodiments, the battery device further comprises a collecting member, which is arranged on a side of the end plate away from the battery cell, and the end of the circuit board is electrically connected to the collecting member, so that the voltage signal of the battery cell can be conveniently collected through the collecting member.

[0026] In some embodiments, the battery device further comprises a connecting piece, the circuit board is provided with a tearing portion, one end of the connecting piece is electrically connected to the tearing portion, and the other end is electrically connected to the battery cell. In this way, when the circuit board moves relative to the battery cell in the first direction, the tearing portion is cracked, and at this time, the connecting piece can be prevented from being torn off.

[0027] In some embodiments, the tearing portion includes a first hollow groove, a second hollow groove and a breakpoint connection portion;

[0028] The first hollow groove is arranged in the circuit board, the second hollow groove is arranged at the edge of the circuit board, and the breakpoint connection part is arranged between the first hollow groove and the second hollow groove;

[0029] One end of the connecting piece facing the circuit board is connected to the first hollow groove, the breakpoint connecting portion, and an area surrounded by the second hollow groove.

[0030] In a second aspect, the present application proposes an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0034] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0036] Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0037] Figure 5 for Figure 4 A schematic diagram after removing the battery cell;

[0038] Figure 6 A schematic diagram of the connection between the circuit board and the end plate provided in some embodiments of the present application;

[0039] Figure 7 Schematic diagram of an end plate provided for some embodiments of the present application;

[0040] Figure 8 Another connection diagram of a circuit board and an end plate provided in some embodiments of the present application;

[0041] Fig. 9 for Figure 8 The enlarged schematic diagram at A in the middle;

[0042] Fig.10 A schematic diagram of a circuit board provided for some embodiments of the present application;

[0043] Fig.11 for Fig.10 The enlarged schematic diagram of point B in FIG.

[0044] The reference numerals in the specific implementation manner are as follows:

[0045] 1000. Vehicles;

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

[0047] 110, box body; 111, first part; 112, second part; 120, battery cell group; 121, shell; 122, end cover; 123, electrode assembly;

[0048] 10. Box body; 101. Accommodating cavity; 11. End plate; 12. Circuit board; 124. Groove; 13. Fixing plate; 131. First limiting portion; 132. Fastener; 133. Second limiting portion; 134. Protrusion; 14. Battery cell; 15. Connecting piece; 16. First hollow groove; 17. Second hollow groove; 18. Breakpoint connecting portion. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0058] In a battery module, a flexible printed circuit board (FPC) is usually used to collect voltage and temperature signals of battery cells.

[0059] The side of the battery cell is generally provided with an end plate, on which a reinforcing plate is fixed, and the FPC is mostly fixed to the reinforcing plate by gluing. Since the battery cell will expand during use, when the battery cell expands, it will drive the end plate to move, and at this time, the end plate will drive the FPC to move, which will cause the FPC to be pulled and broken.

[0060] In order to absorb the expansion of battery cells and prevent the FPC from being pulled and broken due to stress, a redundant part is generally designed on the FPC to absorb the expansion of battery cells. However, the redundant part is prone to interfere with other components.

[0061] Based on the above considerations, in order to solve the problem that FPC has redundant parts and is prone to interfere with other components when in use, a battery device is designed, which includes a case, a battery cell, an end plate and a circuit board, wherein the case has a accommodating cavity, the battery cells are stacked and arranged in the accommodating cavity along a first direction, the end plate is arranged on the side of the battery cell along the first direction, the circuit board is electrically connected to the battery cell, and one end of the circuit board facing the end plate is arranged on the end plate, and the circuit board can move relative to the end plate along the first direction.

[0062] In the technical solution of the embodiment of the present application, since the circuit board can move relative to the end plate along the stacking direction of the battery cells, when the battery cells expand, although the end plate will move along the stacking direction under the action of the battery cells, the circuit board as a whole will not move relative to the battery cells, that is, it will not affect the circuit board. In this way, the circuit board does not need to be designed with additional redundancy to absorb expansion, thereby saving space in the accommodating cavity and reducing the risk of interference and warping.

[0063] The battery in this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. The battery can be used as a power source or power system for an electrical device, which is conducive to improving the overall performance of the battery and facilitating the promotion of the battery.

[0064] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0066] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0067] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for 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 An exploded view of a battery 100 provided for some embodiments of the present application. The battery 100 includes a box body 110 and a battery cell group 120, and the battery cell group 120 is contained in the box body 110. Among them, the box body 110 is used to provide a storage space for the battery cell group 120, and the box body 110 can adopt a variety of structures. In some embodiments, the box body 110 may include a first part 111 and a second part 112, the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell group 120. The second part 112 may be a hollow structure with one end open, the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0069] In the battery 100, there may be multiple battery cell groups 120, and the multiple battery cell groups 120 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cell groups 120 are both connected in series and in parallel. The multiple battery cell groups 120 may be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cell groups 120 is accommodated in the box body 110; of course, the battery 100 may also be a battery module formed by connecting multiple battery cell groups 120 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box body 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cell groups 120.

[0070] Each battery cell group 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell group 120 may be cylindrical, flat, rectangular, or in other shapes.

[0071] like Figure 3As shown, the battery cell group 120 may include a housing, an electrode assembly 123 and electrode terminals. The housing includes a shell 121 and an end cap 122. The shell 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell group 120 from the external environment.

[0072] The shell 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell group 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte and other components. The shell 121 and the end cap 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0073] The end cap 122 refers to a component that covers the opening of the shell 121 to isolate the internal environment of the battery cell group 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 121 to match the shell 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength, such as an aluminum alloy, so that the end cap 122 is not easily deformed when squeezed and collided, so that the battery cell group 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap 122. The electrode terminal can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell group 120. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 122, and the insulating structure may be used to isolate the electrical connection components in the housing 121 from the end cap 122 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0074] The electrode assembly 123 is a component in the battery cell group 120 where an electrochemical reaction occurs. One or more electrode assemblies 123 may be included in the housing 121. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 123, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal to form a current loop. In addition, the electrode assembly 123 may be a winding structure or a laminated structure.

[0075] In some embodiments, the battery cell group 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell group 120 reaches a threshold value.

[0076] According to some embodiments of the present application, Figure 4 is a schematic diagram of the structure of the battery device in this application, Figure 5 for Figure 4 Schematic diagram after removing the battery cell, Figure 6 FIG. 1 is a schematic diagram of the connection between the circuit board and the end plate in this application. Figure 4-Figure 6 As shown, the present application provides a battery device, which includes a case 10, a battery cell 14, an end plate 11 and a circuit board 12, wherein the case 10 has a accommodating cavity 101, the battery cells 14 are stacked and arranged in the accommodating cavity 101 along a first direction, the end plate 11 is arranged on the side of the battery cell 14 along the first direction, the circuit board 12 is electrically connected to the battery cell 14, one end of the circuit board 12 facing the end plate 11 is arranged on the end plate 11, and the circuit board 12 can move relative to the end plate 11 along the first direction.

[0077] The first direction in this embodiment is as follows Figure 4 or Figure 5 The X-axis direction.

[0078] The upper side of the box body 10 in this embodiment is an open structure, and a receiving cavity 101 is formed inside the box body 10, and the receiving cavity 101 can be used to accommodate the battery cell 14. The box body 10 can be a rectangular parallelepiped, a cylinder, etc., which can be determined according to actual conditions and is not limited in this embodiment of the specification.

[0079] The end plate 11 in this embodiment can be bonded to the side of the battery cell 14 along the X-axis direction, or the end plate 11 can be clamped to the side of the battery cell 14 along the X-axis direction. The specific method can be determined according to actual conditions and is not limited in this embodiment of the present specification.

[0080] The circuit board 12 in this embodiment can be a flexible circuit board, which can be made of polyimide or polyester film as a substrate, and is a printed circuit board with good toughness, and has the characteristics of high wiring density, light weight, thin thickness, and good bendability.

[0081] The circuit board 12 in this embodiment is electrically connected to the battery cell 14 , so that the electrical signal parameters of the battery cell 14 can be easily collected.

[0082] In this embodiment, after the end of the circuit board 12 facing the end plate 11 is connected to the end plate 11, Figure 6 As shown, at this time, the circuit board 12 can move relative to the end plate 11 along the X-axis direction, and at the same time, the circuit board 12 is blocked from moving along the Z-axis direction, wherein the Z-axis direction is the height direction of the end plate 11.

[0083] In the technical solution of the embodiment of the present application, since the circuit board 12 can move relative to the end plate 11 along the stacking arrangement direction of the battery cell 14, when the battery cell 14 expands, although the end plate 11 will move along the stacking arrangement direction under the action of the battery cell 14, since the circuit board 12 can move relative to the end plate 11 along the stacking arrangement direction of the battery cell 14, at this time, the circuit board 12 as a whole will not move relative to the battery cell 14, and the circuit board 12 will not be pulled. In this way, the circuit board 12 does not need to be designed with additional redundant expansion absorption, thereby saving space in the accommodating cavity 101 and reducing the risk of interference and warping.

[0084] According to some embodiments of the present application, Figure 7 As shown, the battery device also includes a first fixing component, which includes a fixing plate 13 and a first limiting portion 131, wherein the fixing plate 13 is arranged on the end plate 11, and the side of the fixing plate 13 facing away from the end plate 11 is connected to the first limiting portion 131; at the same time, one end of the circuit board 12 facing the end plate 11 is located between the fixing plate 13 and the first limiting portion 131, the circuit board 12 can move along the first direction relative to the first limiting portion 131, and the end of the circuit board 12 facing the end plate 11 is blocked from moving along the height direction of the battery cell 14.

[0085] The fixing plate 13 in this embodiment can be fixed to the upper side of the end plate 11 by bolts or buckles. The specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0086] refer to Figure 7As shown, the first limiting portion 131 in this embodiment can be a bent structure as a whole, the first limiting portion 131 can be integrally formed with the fixing plate 13, or the first limiting portion 131 can be snapped onto the fixing plate 13. The specific details can be determined based on actual conditions, and the embodiments of this specification do not limit this.

[0087] refer to Figure 6 As shown, when one end of the circuit board 12 facing the end plate 11 is located between the first limit portion 131 and the fixed plate 13, the circuit board 12 is blocked from moving in the Z-axis direction. At this time, the upper and lower sides of the circuit board 12 along the Z-axis direction are correspondingly abutted and pressed against the first limit portion 131 and the fixed plate 13, or, when one end of the circuit board 12 facing the end plate 11 is located between the first limit portion 131 and the fixed plate 13, there is a gap between the circuit board 12 and the first limit portion 131 in the Z-axis direction.

[0088] When in use, after the fixing plate 13 is fixed to the end plate 11, the end of the circuit board 12 facing the end plate 11 is passed through between the first limit portion 131 and the fixing plate 13, so that the circuit board 12 can be conveniently connected to the end plate 11. At this time, the circuit board 12 can move in the X-axis direction relative to the first limit portion 131, and at the same time, the circuit board 12 cannot move in the Z-axis direction under the restriction of the first limit portion 131 and the fixing plate 13.

[0089] According to some embodiments of the present application, Figure 7 As shown, two first limiting portions 131 are provided on the side of the fixing plate 13 facing away from the end plate 11, and the two first limiting portions 131 are spaced apart along the second direction; at the same time, one end of the circuit board 12 facing the end plate 11 is located between the two first limiting portions 131, wherein the second direction intersects with the first direction.

[0090] In this embodiment, if Figure 7 As shown, the second direction is the Y-axis direction, wherein the angle between the X-axis and the Y-axis may be 80°, 85°, 90°, etc. This embodiment is described by taking the X-axis and the Y-axis as being perpendicular to each other.

[0091] In this embodiment, two, four, etc. first limiting portions 131 may be provided on the fixing plate 13 . For the convenience of description, the following description will be made by taking the example that two first limiting portions 131 are provided on the fixing plate 13 .

[0092] The structure of the first limiting portion 131 and the connection structure between the first limiting portion 131 and the fixing plate 13 in this embodiment can be referred to the above description and will not be described in detail here.

[0093] When using, refer to Figure 6 Combined with Figure 7As shown, one end of the circuit board 12 facing the end plate 11 is located between the two first limiting portions 131. In this way, the position of the circuit board 12 in the Y-axis direction is limited by the two first limiting portions 131 to prevent the circuit board 12 from moving in the Y-axis direction, so that the circuit board 12 can be stably connected to the end plate 11.

[0094] According to some embodiments of the present application, Figure 7 As shown, the distance between the two first limiting portions 131 is greater than the maximum dimension of the circuit board 12 along the second direction.

[0095] In this embodiment, the distance between the two first limiting portions 131 in the Y-axis direction is set to H, and the width of the circuit board in the Y-axis direction is L, wherein H minus L can be between 1-5 mm, which can be determined based on actual conditions and is not limited in this embodiment of the present specification.

[0096] In this way, when one end of the circuit board 12 facing the end plate 11 is located between the two first limit portions 131 , the circuit board 12 can be fine-tuned between the two first limit portions 131 , thereby facilitating adjustment of the position of the circuit board 12 in the Y-axis direction.

[0097] According to some embodiments of the present application, Figure 8 Combined with Fig. 9 As shown, the battery device also includes a second fixing component, which includes a fixing plate 13 and a second limiting portion 133, wherein the fixing plate 13 is arranged on the end plate 11, and the side of the fixing plate 13 facing away from the end plate 11 is connected to the second limiting portion 133, and the second limiting portion 133 is provided with a protrusion 134 on the side facing the fixing plate 13; at the same time, a groove 124 is provided at one end of the circuit board 12 facing the end plate 11, the groove 124 cooperates with the protrusion 134, and the groove 124 can move along the first direction relative to the protrusion 134.

[0098] The first direction in this embodiment is as follows Figure 8 The X-axis direction.

[0099] The fixing plate 13 in this embodiment can be fixed to the upper side of the end plate 11 by bolts or buckles. The specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0100] refer to Figure 8 As shown, the second limiting portion 133 in this embodiment can be a plate-type structure as a whole, and the second limiting portion 133 can be integrally formed with the fixed plate 13, or the second limiting portion 133 can be snapped onto the fixed plate 13. The specific details can be determined based on actual conditions, and the embodiments of this specification do not limit this.

[0101] When the second limiting portion 133 is fixed to the upper surface of the fixing plate 13 , a gap exists between the second limiting portion 133 and the fixing plate 13 in the Z-axis direction, and one end of the circuit board 12 facing the end plate 11 can pass through the gap.

[0102] In this embodiment, reference Fig. 9 As shown, the protrusion 134 is located on the side of the second limiting portion 133 facing the groove 124 , the protrusion 134 can be integrally formed with the second limiting portion 133 , and the dimension of the protrusion 134 along the X-axis direction is smaller than the dimension of the groove 124 along the X-axis direction.

[0103] When in use, after the fixing plate 13 is fixed to the end plate 11, after the end of the circuit board 12 facing the end plate 11 passes through between the second limiting portion 133 and the fixing plate 13, the protrusion 134 on the second limiting portion 133 is located in the groove 124 on the circuit board 12, so that the circuit board 12 can be easily connected to the end plate 11. At this time, the groove 124 can move relative to the protrusion 134 along the X-axis direction, and at the same time, the circuit board 12 cannot move in the Z-axis direction under the restriction of the second limiting portion 133 and the fixing plate 13.

[0104] According to some embodiments of the present application, two second limiting portions 133 are provided on the side of the fixed plate 13 facing away from the end plate 11, and the two second limiting portions 133 are spaced apart along the second direction, and each second limiting portion 133 is provided with a protrusion 134 on the side facing the fixed plate 13; two grooves 124 are provided on the end of the circuit board 12 facing the end plate 11, and the grooves 124 cooperate with the protrusions 134, wherein the second direction intersects with the first direction.

[0105] In this embodiment, if Figure 8 As shown, the second direction is the Y-axis direction, wherein the angle between the X-axis and the Y-axis may be 80°, 85°, 90°, etc. This embodiment is described by taking the X-axis and the Y-axis as being perpendicular to each other.

[0106] In this embodiment, two, four, etc. second limiting portions 133 may be provided on the fixing plate 13 . For the convenience of description, the following description will be made by taking the example that two second limiting portions 133 are provided on the fixing plate 13 .

[0107] The structure of the second limiting portion 133 and the connection structure between the second limiting portion 133 and the fixing plate 13 in this embodiment can be referred to the above description and will not be described in detail here.

[0108] When using, refer to Figure 8 Combined with Fig. 9As shown, one end of the circuit board 12 facing the end plate 11 is located between the two second limiting portions 133. At this time, the two protrusions 134 are correspondingly located in the two grooves 124. The position of the circuit board 12 in the Y-axis direction is limited by the two second limiting portions 133 to prevent the circuit board 12 from moving in the Y-axis direction, so that the circuit board 12 can be stably connected to the end plate 11.

[0109] According to some embodiments of the present application, the distance between the two second position-limiting portions 133 is greater than the maximum dimension of the circuit board 12 along the second direction. In this way, when the end of the circuit board 12 facing the end plate 11 is located between the two second position-limiting portions 133, the circuit board 12 can be moved between the two second position-limiting portions 133, so as to facilitate the adjustment of the position of the circuit board 12 in the Y-axis direction.

[0110] According to some embodiments of the present application, the battery device further includes a fastener 132 , and the fixing plate 13 is connected to the end plate 11 via the fastener 132 .

[0111] The fastener 132 in this embodiment can be a bolt, a connecting pin, etc. The specific one can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0112] When in use, the fixing plate 13 can be conveniently fixed to the end plate 11 by the fastener 132 .

[0113] According to some embodiments of the present application, the battery device further includes a detection component, which is electrically connected to the circuit board 12 .

[0114] The detection element in this embodiment can be a thermistor NTC. The thermistor is a resistor whose resistance changes with temperature. Its temperature detection principle is based on the temperature sensitivity of the material. When the temperature rises, the resistance of the thermistor will decrease; when the temperature decreases, the resistance will increase.

[0115] In the application of temperature detection of the battery cell 14 , the thermistor is connected to the circuit board 12 , and the temperature of the battery cell 14 can be conveniently determined by measuring the change in resistance of the thermistor.

[0116] Of course, it is understandable that the above-mentioned detection element can also be a temperature sensor, a thermocouple, etc., which can be specifically determined according to actual conditions, and the embodiments of this specification do not limit this.

[0117] According to some embodiments of the present application, the battery device further includes a collecting member (not shown in the figure), which is disposed on a side of the end plate 11 away from the battery cell 14 , and the end of the circuit board 12 is electrically connected to the collecting member.

[0118] The acquisition component in this embodiment may be an acquisition board or an AFE (Analog Front End, AFE) chip, which is mainly used to acquire the voltage signal of the battery cell 14 .

[0119] The collecting member in this embodiment can be fixed to the side of the end plate 11 away from the battery cell 14 by bolts, or bonded to the side of the end plate 11 away from the battery cell 14. The specific method can be determined according to actual conditions and is not limited in this embodiment of the present specification.

[0120] When in use, the circuit board 12 transmits the signal to the acquisition component, which then transmits it to the main board of the battery management system (BMS) to effectively manage the battery system.

[0121] According to some embodiments of the present application, Fig.10 As shown, the battery device further includes a connecting piece 15 , a tearing portion is provided on the circuit board 12 , one end of the connecting piece 15 is electrically connected to the tearing portion, and the other end is electrically connected to the battery cell 14 .

[0122] In this embodiment, a tearing portion is provided on the circuit board 12. When the circuit board 12 moves along the X-axis direction, the tearing portion correspondingly cracks. Since the connecting piece 15 is electrically connected to the tearing portion, when the tearing portion cracks, the connecting piece 15 will be displaced relative to the tearing portion, thereby preventing the connecting piece 15 from being torn off.

[0123] According to some embodiments of the present application, Fig.11 As shown, the tearing portion includes a first hollow groove 16, a second hollow groove 17 and a breakpoint connecting portion 18; wherein, the first hollow groove 16 is arranged in the circuit board 12, the second hollow groove 17 is arranged at the edge of the circuit board 12, and the breakpoint connecting portion 18 is arranged between the first hollow groove 16 and the second hollow groove 17; one end of the connecting piece 15 facing the circuit board 12 is connected to the area enclosed by the first hollow groove 16, the breakpoint connecting portion 18 and the second hollow groove 17.

[0124] When the circuit board 12 moves along the X-axis direction, the reference Fig.11 As shown, at this time, the breakpoint connection portion 18 between the first hollow groove 16 and the second hollow groove 17 is disconnected. At this time, the end of the connecting piece 15 facing the circuit board 12 has a large displacement redundant space, which is beneficial to reduce the damage to the connecting piece 15 caused by the pulling force.

[0125] The present application also provides an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0126] The specific structure of the battery device in this embodiment refers to the above embodiment. Since all the technical solutions of all the above embodiments are adopted in this electrical device, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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 included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body having a containing cavity; Battery cells, the battery cells are stacked and arranged in the accommodating cavity along a first direction; An end plate, the end plate being arranged on a side surface of the battery cell along a first direction; A circuit board is electrically connected to the battery cell, one end of the circuit board facing the end plate is arranged on the end plate, and the circuit board can move relative to the end plate along the first direction.

2. The battery device according to claim 1, characterized in that: The battery device further includes a first fixing assembly, the first fixing assembly including a fixing plate and a first limiting portion; The fixing plate is arranged on the end plate, and a side of the fixing plate facing away from the end plate is connected to the first limiting portion; One end of the circuit board facing the end plate is located between the fixing plate and the first limiting portion, the circuit board can move along the first direction relative to the first limiting portion, and the end of the circuit board facing the end plate is blocked from moving along the height direction of the battery cell.

3. The battery device according to claim 2, characterized in that: Two first limiting portions are arranged on one side of the fixing plate away from the end plate, and the two first limiting portions are spaced apart and distributed along the second direction; One end of the circuit board facing the end plate is located between the two first limiting portions, wherein the second direction intersects with the first direction.

4. The battery device according to claim 3, characterized in that: The distance between the two first limiting portions is greater than the maximum dimension of the circuit board along the second direction.

5. The battery device according to claim 1, characterized in that: The battery device further includes a second fixing assembly, the second fixing assembly including a fixing plate and a second limiting portion; The fixing plate is arranged on the end plate, a side of the fixing plate facing away from the end plate is connected to the second limiting portion, and a side of the second limiting portion facing the fixing plate is provided with a protrusion; A groove is provided at one end of the circuit board facing the end plate, the groove cooperates with the protrusion, and the groove can move relative to the protrusion along the first direction.

6. The battery device according to claim 5, characterized in that: Two second limiting portions are arranged on a side of the fixing plate away from the end plate, the two second limiting portions are spaced apart along the second direction, and a protrusion is arranged on a side of each second limiting portion facing the fixing plate; Two grooves are arranged at one end of the circuit board facing the end plate, and the grooves are matched with the protrusions, wherein the second direction intersects with the first direction.

7. The battery device according to claim 6, characterized in that: The distance between the two second limiting portions is greater than the maximum dimension of the circuit board along the second direction.

8. The battery device according to any one of claims 2 to 7, characterized in that: The battery device further includes a fastener, and the fixing plate is connected to the end plate via the fastener.

9. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further comprises a detection member, and the detection member is electrically connected to the circuit board.

10. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further comprises a collecting member, which is arranged on a side of the end plate away from the battery cell, and the end of the circuit board is electrically connected to the collecting member.

11. The battery device according to any one of claims 1 to 7, characterized in that: The battery device further comprises a connecting piece, a tearing portion is provided on the circuit board, one end of the connecting piece is electrically connected to the tearing portion, and the other end of the connecting piece is electrically connected to the battery cell.

12. The battery device according to claim 11, characterized in that: The tearing portion includes a first hollow groove, a second hollow groove and a breakpoint connection portion; The first hollow groove is arranged in the circuit board, the second hollow groove is arranged at the edge of the circuit board, and the breakpoint connection part is arranged between the first hollow groove and the second hollow groove; One end of the connecting piece facing the circuit board is connected to the first hollow groove, the breakpoint connecting portion, and an area surrounded by the second hollow groove.

13. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 12.

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