Battery device and electric equipment

Abstract

The utility model relates to the technical field of battery equipment, and discloses a battery device and electric equipment. The battery device comprises battery monomer components, first components, second components, a sampling component and a first structure, the first components in the same battery monomer component are arranged to form a first component column, the second components are connected to the first component column, and a first end of a sampling terminal of the sampling component is mechanically and electrically connected with a main circuit board of the sampling component. The sampling terminal is configured to be capable of moving and deforming relative to the main body circuit board by taking the first end as a fulcrum, the second end of the sampling terminal is used for being electrically connected with a first component, the first structure is at least partially arranged between a second component and the sampling terminal, and the second component is adhered to the first component; the first structure is higher than an upper surface of the second component facing away from the first surface. By applying the technical scheme, the sampling terminal of the sampling assembly and the main body circuit board are prevented from being broken easily, so that the information acquisition reliability is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery devices, and particularly relates to a battery device and an electric device. BACKGROUND

[0002] In the battery device, the voltage, temperature and other information of the battery monomer is collected through a sampling assembly. The sampling assembly includes a main circuit board and a sampling terminal which are electrically connected. The main circuit board is fixedly arranged relative to the battery monomer, and the sampling terminal is electrically connected to the first component to collect information. When the battery monomer expands and generates deformation displacement, the sampling terminal needs to move and deform synchronously with the deformation displacement of the battery monomer, which is the key to protecting the sampling terminal and the main circuit board from being easily broken to improve the information collection reliability. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a battery device and an electric device, and aims to protect the sampling terminal and the main circuit board of the sampling assembly from being easily broken to improve the information collection reliability.

[0004] To achieve the above-mentioned purpose, according to the first aspect of the embodiment of the application, a battery device is provided, which includes a plurality of battery monomer assemblies, a plurality of first components, a second component, a sampling assembly and a first structure. The battery monomer assembly includes a plurality of battery monomers arranged along a first direction. The plurality of battery monomer assemblies are distributed along a second direction. The battery monomer includes a first surface. The first direction intersects the second direction. The first component is located on the first surface and is used for electrically connecting different battery monomers. The plurality of first components in the same battery monomer assembly are arranged to form a first component column. The second component is located on the first surface and is connected to the first component column. The sampling assembly is located on the first surface and is located on one side of the second component along the second direction. The sampling assembly includes a main circuit board and a sampling terminal. The sampling terminal has a first end and a second end which are connected to each other. The first end is mechanically connected and electrically connected to the main circuit board. The sampling terminal is configured to move and deform along the first direction relative to the main circuit board with the first end as a fulcrum. The second end is used for electrically connecting with the first component. Along the second direction, the first structure is at least partially arranged between the second component and the sampling terminal. The second component is connected to the upper surface of the first component away from the first surface through a colloid. The first structure is higher than the upper surface of the second component away from the first surface.

[0005] The battery device provided by the embodiments of the present application is configured to prevent the glue overflow between the first component and the second component from flowing to the sampling terminal and the main body circuit board, and thus a first structure is arranged between the second component and the sampling assembly of the flexible circuit member. When the second component is fixedly bonded to the first component, the glue overflowed from the second component and the first component is blocked by the first structure, so as to reduce the possibility of the glue overflow flowing to the sampling terminal and the main body circuit board, reduce the probability of the sampling terminal and the main body circuit board being rigidly connected together after the glue is solidified, and then improve the effectiveness of the sampling terminal being capable of relatively moving with respect to the main body circuit board with the first end of the sampling terminal as a fulcrum. In this way, during the use of the battery device, when the battery monomer expands during charging and discharging, the sampling terminal can move and deform in the first direction with respect to the main body circuit board with the first end of the sampling terminal as a fulcrum, so as to ensure that the electrical connection relationship between the second end of the sampling terminal and the main body circuit board is not easily broken, thereby improving the reliability of the sampling assembly in collecting the voltage and temperature information of the battery monomer and improving the reliability of the battery device.

[0006] In some embodiments, the battery device further comprises a third component, the third component is made of insulating material, the third component is arranged on the first surface, and the other parts of the first component and the battery monomer are insulated by the third component. The first structure is a partial structure of the third component.

[0007] In some embodiments, the first structure is configured to be integrally formed with the third component.

[0008] In some embodiments, the first structure is configured to be formed by suction molding, and the molding efficiency is relatively high, which is conducive to improving the assembly and production efficiency of the battery monomer.

[0009] In some embodiments, the first structure comprises a protruding rib extending in the first direction.

[0010] In some embodiments, the first structure is an independently formed glue blocking strip; the battery device further comprises a third component, the third component is made of insulating material, the third component is arranged on the first surface, and the first component is located on the side of the third component away from the first surface; the first structure is bonded to the surface of the side of the third component away from the first surface; or, the first structure is bonded to the first surface.

[0011] In some embodiments, when the battery device comprises the third component, the third component further comprises a second structure, the second structure is configured as a recessed groove recessed towards the first surface with respect to the first structure and used for accommodating the first component.

[0012] In some embodiments, the sampling terminal further includes a bent section between the first end and the second end. The bent section is configured to be at least partially unfolded when the second end moves and deforms relative to the main circuit board along a first direction with the first end as a fulcrum. Along a second direction, the first structure is at least partially disposed between the second component and the bent section. This improves the reliability of the sampling terminal.

[0013] In some embodiments, the length of the first structure extending along the first direction is greater than or equal to the length of the bent segment extending along the first direction, and along the second direction, the bent segment and the second component are separated by the first structure at any position.

[0014] In some embodiments, the sampling assembly further includes an adapter portion, wherein the first structure includes a notch extending along a second direction, and the adapter portion passes through the notch for connecting the first component and the second end.

[0015] In some embodiments, the battery device further includes a third component made of insulating material, the third component being disposed on the first surface, and the first structure further includes a groove disposed on the third component, the groove being located on the side of the notch facing the first component in a second direction.

[0016] According to a second aspect of this application, an electrical appliance is provided. The electrical appliance includes a battery device as described above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0019] Figure 2 This is a three-dimensional structural diagram of a battery cell in an embodiment of the battery device of this application;

[0020] Figure 3 This is a schematic diagram of the assembly structure of a third component, a sampling component, and a first component in a battery device according to an embodiment of this application;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 for Figure 3 A schematic diagram of its decomposition;

[0023] Figure 6for Figure 5 Enlarged view of point B in the middle;

[0024] Figure 7 for Figure 5 An enlarged schematic diagram of point C in the middle;

[0025] Figure 8 for Figure 5 Another enlarged schematic diagram of point C in the middle;

[0026] Figure 9 for Figure 3 Another decomposition diagram;

[0027] Figure 10 This is an exploded view of the third component, the adhesive strip, the first component, and the sampling assembly in another battery device according to an embodiment of this application;

[0028] Figure 11 for Figure 3 or Figure 10 A three-dimensional structural schematic diagram of the first component of the battery device is shown;

[0029] Figure 12 This is a three-dimensional structural schematic diagram of the first component of another battery device according to an embodiment of this application;

[0030] Figure 13 This is a schematic diagram of the structure of an electrical device according to an embodiment of this application.

[0031] The figures in the diagram are labeled as follows:

[0032] 10. Battery cell; 100. Battery cell assembly; 11. Terminal structure; 111. Positive terminal structure; 112. Negative terminal structure; 12. Large sidewall; 13. Small sidewall; 14. Top wall;

[0033] 20. First component; 21. Flanged edge; 22. Groove;

[0034] 30. Second component;

[0035] 40. Sampling component; 411. Main circuit board; 412. Sampling terminal; 413. Adapter; 414. First end; 415. Second end; 416. Weak connection structure; 417. Bending section; 42. Sampling connector;

[0036] 50. First structure; 51. Raised rib; 52. Adhesive strip; 53. Groove; 54. Notch;

[0037] 60. Third component; 61. Clearance hole; 62. Second structure;

[0038] 200. Battery assembly; 201. Box body; 202. Box cover; 203. Assembly space;

[0039] 400. Electrical equipment; 410. Electrical load; 420. Control device; 430. Chassis; 440. Wheel;

[0040] X, the first direction; Y, the second direction. Detailed Implementation

[0041] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0042] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants (battery devices used in these applications are generally referred to as energy storage batteries), but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields (battery devices used in these applications are generally referred to as power batteries).

[0046] With the continuous development and innovation of battery devices, a solution has emerged that can improve the vibration resistance frequency of battery assembly. This solution involves bonding and fixing a second component (i.e., a pressure strip) to a first component (i.e., a plate) that is electrically connected to the terminal structure. The second component confines two adjacent battery cells into a single structure, thereby improving the vibration resistance frequency of the battery device and enabling it to pass more stringent vibration and impact tests.

[0047] In the battery device, information such as voltage and temperature of individual battery cells is collected by a sampling component. The sampling component is a flexible circuit structure, consisting of a main circuit board and sampling terminals that are electrically connected. The main circuit board is fixed relative to the individual battery cells, and the sampling terminals are electrically connected to the battery cells to collect information.

[0048] When attaching the fixing strip to the battery pack, adhesive needs to be applied to the battery pack or the fixing strip before pressing the strip firmly onto the battery pack. During the process of pressing the strip onto the battery pack, the adhesive between the battery pack and the fixing strip may be squeezed out, and there is a possibility that the overflowing adhesive may spill onto the sampling component. When the overflowing adhesive spills onto the sampling component of the flexible circuit component and cures, the cured adhesive rigidly connects the main circuit board of the sampling component to the sampling terminals. When the battery cell expands, the sampling terminals of the sampling component cannot move and deform with the expansion and deformation of the battery cell, making it easy for the sampling terminals to break between the main circuit board and the sampling component, resulting in the failure of the sampling component to sample the battery cell.

[0049] Based on the above considerations, the battery device provided in this application, in order to prevent the adhesive between the first component and the second component from overflowing to the sampling terminal and the main circuit board, therefore, provides a first structure between the second component and the sampling assembly of the flexible circuit component. When the second component is bonded and fixed to the first component, the first structure blocks the adhesive that is squeezed out from between the second component and the first component, thereby reducing the possibility of adhesive overflowing to the sampling terminal and the main circuit board, reducing the probability that the sampling terminal and the main circuit board are rigidly connected by the cured adhesive, and thus improving the effectiveness of the sampling terminal being able to move relative to the main circuit board with the first end of the sampling terminal as a fulcrum. In this way, during the use of the battery device, when the battery cell expands during charging and discharging, the sampling terminal can move and deform relative to the main circuit board with the first end of the sampling terminal as a fulcrum along the first direction, ensuring that the electrical connection between the second end of the sampling terminal and the main circuit board is not easily broken, thereby improving the reliability of the sampling assembly in collecting information such as voltage and temperature from the battery cell, and improving the reliability of the battery device. Furthermore, embodiments of this application also provide an electrical device that is assembled using the battery device provided in the embodiments of this application to provide electrical energy.

[0050] To illustrate the technical solutions provided by the embodiments of this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0051] like Figure 1 The spatial rectangular coordinate system O-XYZ is shown, where the X-axis represents the first direction X, the Y-axis represents the second direction Y, and the first direction X intersects (i.e., is perpendicular) the second direction Y.

[0052] According to a first aspect of the embodiments of this application, embodiments of this application provide a battery device 200. For example... Figures 1 to 8 As shown, the battery device 200 includes a plurality of battery cell assemblies 100, a plurality of first components 20, at least one second component 30, a sampling component 40, and a first structure 50. The plurality of battery cells 10 form a plurality of battery cell assemblies 100, wherein a battery cell assembly 100 includes a plurality of battery cells 10, the plurality of battery cells 10 extending along their thickness direction (i.e., Figure 1The battery cells are arranged in a first direction (X), meaning each battery cell assembly 100 extends along the first direction X, and multiple battery cell assemblies 100 are arranged side-by-side along a second direction Y. Each battery cell 10 includes a first surface with terminal structures 11. Each terminal structure 11 of the battery cell 10 includes a positive terminal structure 111 and a negative terminal structure 112. In each battery cell assembly 100, a first component 20 is electrically connected to the terminal structure 11. Specifically, adjacent battery cells 10 are connected via the first component 20 to the corresponding positive terminal structure 111 and the corresponding negative terminal structure 112, allowing adjacent battery cells 10 to form a series or parallel connection. That is, the first component 20 is used to electrically connect different battery cells 10, and multiple first components 20 within the same battery cell assembly 100 are arranged to form a first component row. Furthermore, in the battery device 200, multiple battery cell assemblies 100 are connected via the first component 20, allowing multiple battery cell assemblies 100 to form a series, parallel, or mixed connection. In the battery device 200, a second component 30 (commonly known as a pressure strip) is bonded and fixed between two adjacent columns of first components 20 between two adjacent battery cell assemblies 100. During assembly, multiple first components 20 are connected together to form an integral structure. The second component 30 is located on the first surface and connected to the column of first components. This can improve the vibration resistance of the battery device 200 and improve the stability and reliability of the battery device 200. The sampling component 40 is a flexible circuit component. The sampling component 40 includes a main circuit board 411 and a sampling terminal 412. The main circuit board 411 extends along the first direction X and is located above the battery cell assembly 100 and close to the terminal structure 11. The sampling terminal 412 has a first end 414 and a second end 415. The first end 414 is mechanically and electrically connected to the main circuit board 411. The sampling terminal 412 can move and deform relative to the main circuit board 411 with the first end 414 as the fulcrum along the first direction X. The second end 415 of the sampling terminal 412 is used for electrical connection with the first component 20. Specifically, the second end 415 of the sampling terminal 412 is connected to an adapter 413, which is electrically connected to the first component 20. A first structure 50 is provided between the second component 30 and the sampling component 40. Along the second direction Y, the first structure 50 is at least partially disposed between the second component 30 and the sampling terminal 412. The second component 30 is connected to the upper surface of the first component 20 away from the first surface by an adhesive. The first structure 50 is higher than the upper surface of the second component 30 away from the first surface.

[0053] In the battery device 200 of this application embodiment, a first structure 50 is provided between the second component 30 and the sampling assembly 40 to prevent the adhesive between the second component 30 and the first component 20 from overflowing to the sampling terminal 412 and the main circuit board 411. When the second component 30 is fixed to the upper surface of the first component 20 away from the first surface of the battery cell 10 by adhesive bonding, the first structure 50 blocks the adhesive that is squeezed out from between the second component 30 and the first component 20, thereby reducing the possibility of adhesive overflowing to the sampling terminal 412 and the main circuit board 411, reducing the probability that the sampling terminal 412 and the main circuit board 411 are rigidly connected together by the cured adhesive, and thereby improving the effectiveness of the sampling terminal 412 being able to move relative to the main circuit board 411 with the first end 414 of the sampling terminal 412 as a fulcrum. Thus, during the use of the battery device 200, the battery cell 10 expands during charging and discharging. The sampling terminal 412 can move and deform relative to the main circuit board 411 with the first end 414 of the sampling terminal 412 as the fulcrum along the first direction X. This ensures that the electrical connection between the sampling terminal 412 and the main circuit board 411 is not easily broken, thereby improving the reliability of the sampling component 40 in collecting information such as voltage and temperature from the battery cell 10 and improving the reliability of the battery device 200.

[0054] In some embodiments, in each battery cell assembly 100, along a first direction X, a plurality of positive electrode post structures 111 are arranged in a row, and a plurality of first components 20 corresponding to the plurality of positive electrode post structures 111 are arranged to form a first component column; a plurality of negative electrode post structures 112 are arranged in a row, and a plurality of first components 20 corresponding to the plurality of negative electrode post structures 112 are arranged to form a first component column. There are multiple sampling components 40, each corresponding to one of the multiple battery cell assemblies 100, and the main circuit board 411 of each sampling component 40 is located between two columns of electrode post structures 11 of the battery cell assembly 100. Each sampling component 40 has multiple sampling terminals 412, and in each battery cell assembly 100, the multiple sampling terminals 412 are connected to the multiple first components 20 in a one-to-one correspondence. In this embodiment, a sampling terminal 412 is responsible for sampling a first component 20. That is, sampling is performed on each first component 20 in the battery device 200, thereby monitoring the operation of the battery device 200 in more detail and improving the safety of the battery device 200.

[0055] In the embodiments of this application, the battery cell 10 can be a rechargeable battery, which refers to a battery cell 10 that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 10 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc. Furthermore, the battery cell 10 provided in the embodiments of this application is a square battery cell, also referred to as a square cell. Figure 2 As shown, the square battery cell 10 has two large sidewalls 12 with larger surface areas, two small sidewalls 13 with smaller surface areas, a bottom wall, and a top wall 14 (the top wall 14 is the first surface mentioned above, and the bottom wall is the second surface corresponding to the first surface). The two large sidewalls 12 and the two small sidewalls 13 are alternately connected. The two large sidewalls 12 are distributed along the first direction X, and the two small sidewalls 13 are distributed along the second direction Y. The second surface and the first surface are located at the upper and lower ends of the columnar sidewalls, respectively. Generally, the first surface is provided with structures such as a pressure relief mechanism and an electrode post structure 11, making it relatively easy to identify the first surface. The wall opposite to the first surface is the second surface. The two large sidewalls 12 and the two small sidewalls 13 can be directly distinguished by the size of their surface areas. During charging and discharging, the battery cell 10 expands and deforms. Since the two large sidewalls 12 bear most of the expansion stress, the expansion deformation of the battery cell 10 is mainly along the first direction X. Furthermore, the terminal post structure 11 on the first surface and the first component 20 thereon also move along the first direction X. Because the sampling terminal 412 is connected to the first component 20 via the adapter 413, the first component 20 moves along the first direction X along with the sampling terminal 412. The main circuit board 411 is fixedly disposed between the two rows of terminal post structures 11 of the battery cell assembly 100. Therefore, the sampling terminal 412 moves and deforms relative to the main circuit board 411 with its first end 414 as a fulcrum along the first direction X, ensuring that the electrical connection between the sampling terminal 412 and the main circuit board 411 is not easily broken.

[0056] like Figure 1 , Figures 3 to 6 , Figure 9 and Figure 10As shown, a portion of the first component 20 is connected to the terminal structure 11, while the remaining portion needs to maintain insulation from other structures of the battery cell 10. In some embodiments, the battery device 200 further includes a third component 60, which is an insulating plate made of insulating plastic through vacuum forming. The third component 60 covers the battery cell assembly 100, i.e., the third component 60 is disposed on the first surface of multiple battery cells 10 of the battery cell assembly 100, and the first structure 50 is a partial structure of the third component 60. The third component 60 is provided with clearance holes 61, and the terminal structures 11 are correspondingly inserted through the clearance holes 61. The first component 20 is located on the side of the third component 60 away from the battery cell 10. In this way, the first component 20 can only be connected to the terminal structure 11 to achieve electrical connection, and the other parts of the first component 20 are isolated from the battery cell 10 by the third component 60 to achieve insulation. The main circuit board 411 is fixedly attached to the third component 60 by adhesive bonding. The first structure 50 is disposed on the third component 60. The third component 60 includes a second structure 62, which is configured as a recessed groove facing the first surface relative to the first structure 50. This recessed groove is used to accommodate the first component 20. The third component 60 not only provides a fixed mounting position for the sampling assembly 40, but also provides insulation between the sampling assembly 40 and the battery cell 10. Figure 11 and Figure 12 As shown, the first component 20 has a groove 22 formed in the middle that is recessed toward the battery cell 10. When the second component 30 is fixed to the upper surface of the first component 20 away from the first surface by adhesive bonding, most of the squeezed adhesive between the second component 30 and the first component 20 will overflow into the groove 22. The adhesive overflowing outward will first overflow from the edge of the first component 20 to the third component 60. Then the adhesive will accumulate on the third component 60 and overflow toward the sampling terminal 412. In this embodiment, the first structure 50 is provided on the third component 60 and the first structure 50 is a partial structure of the third component 60. The first structure 50 blocks the adhesive from overflowing onto the third component 60 toward the sampling terminal 412, reducing the probability that the sampling terminal 412 and the main circuit board 411 are rigidly connected together by the cured adhesive.

[0057] Typically, multiple battery cell modules 100 are arranged side-by-side within the battery device 200, such as... Figure 1 As shown, the multiple battery cell modules 100 can be connected in series, in parallel, or in a mixed configuration. The third component 60 can simultaneously cover multiple battery cell modules 100, such as... Figure 1 , Figure 3 , Figure 5 and Figure 10 That is, the battery device 200 has only one integrally formed third component 60 that can simultaneously cover all the battery cell assembly 100. Or, asFigure 9 As shown, the third component 60 consists of multiple pieces, each covering one of the battery cell modules 100 in a one-to-one correspondence. Adjacent third components 60 are joined together to cover all battery cell modules 100. Alternatively, the third component 60 may consist of multiple pieces, each covering at least two adjacent battery cell modules 100. This means one third component 60 covers two or more adjacent battery cell modules 100, and adjacent third components 60 are joined together to cover all battery cell modules 100. Thus, except for the connection point with the terminal structure 11, the first component 20 is isolated from the battery cells 10 by the third component 60, achieving insulation and improving the electrical safety of the battery device 200.

[0058] In some embodiments, the first structure 50 is integrally formed on the third component 60, meaning the first structure 50 is a partial structure of the third component 60. That is, when the third component 60 is manufactured by vacuum forming of the insulating plastic, the first structure 50 is also formed simultaneously, resulting in higher manufacturing efficiency and improving the assembly production efficiency of the battery cell 10. The first structure 50 includes a rib 51; that is, when the third component 60 is vacuum formed of the insulating plastic, the first structure 50 integrally formed on the third component 60 is the rib 51, meaning the rib 51 is a partial structure of the third component 60, and the rib 51 extends along the first direction X.

[0059] In other embodiments, such as Figure 10 As shown, the first structure 50 includes an independently formed adhesive-blocking strip 52. This adhesive-blocking strip 52 is a separate component independent of the third component 60. It is bonded to the third component 60 with double-sided adhesive and extends along the first direction X. The adhesive-blocking strip 52 prevents adhesive from overflowing onto the third component 60 and flowing towards the sampling terminal 412, thereby reducing the possibility of adhesive overflowing onto the sampling terminal 412 and the main circuit board 411. Specifically, the adhesive-blocking strip 52 can be fixed to the third component 60 with double-sided adhesive, preventing adhesive overflow from affecting the mobility of the sampling terminal 412; alternatively, the adhesive-blocking strip 52 can be embedded in a slot in the third component 60 and protrude from the surface of the third component 60. This achieves the purpose of the adhesive-blocking strip 52 in preventing adhesive overflow towards the sampling terminal 412. When the first structure 50 is a baffle strip 52 that is independent of the third component 60, the baffle strip 52 can be a strip-shaped component made of plastic, rubber, silicone or other materials, or it can be a strip-shaped component made of insulating foam.

[0060] When the battery cell 10 expands, in order to enable the expanded battery cell 10 to smoothly pull the adapter 413 and the sampling terminal 412 to move and deform relative to the main circuit board 411 along the first direction X, in some embodiments, such as Figure 4 As shown, the first structure 50 has a notch 54, through which the adapter 413 passes. This ensures that both ends of the adapter 413 are essentially in the same plane parallel to the plane containing the second surface of the battery cell 10. That is, the electrical connection between the adapter 413 and the first component 20, and the connection between the adapter 413 and the sampling terminal 412, are essentially in the same plane. This results in virtually no friction between the adapter 413 and the first structure 50. When the battery cell 10 expands, the expansion stress can be smoothly transmitted to the sampling terminal 412 through the adapter 413, allowing the expanded battery cell 10 to smoothly move and deform relative to the main circuit board 411 along the first direction X, carrying the adapter 413 and the sampling terminal 412.

[0061] In some embodiments, when the sealing strip 52 is a strip-shaped component made of elastically deformable materials such as rubber, silicone, or insulating foam, the sealing strip 52 is an insulating material. The sealing strip 52 can be bonded to the third component 60 via adhesive, or it can be bonded to the first surface via adhesive. The adapter 413 of the sampling terminal 412 can directly straddle the sealing strip 52, and then the adapter 413 is electrically connected to the first component 20. The adapter 413 and the sealing strip 52 are substantially flush with the top surface of the battery cell 10. When the battery cell 10 expands and pulls the adapter 413 and sampling terminal 412 to move and deform along the first direction X, although there is a certain friction between the adapter 413 and the baffle strip 52, the stress caused by the expansion of the battery cell 10 and pulling the adapter 413 can overcome the friction between the adapter 413 and the baffle strip 52, thereby enabling the sampling terminal 412 to move and deform smoothly along the first direction X relative to the main circuit board 411.

[0062] In embodiments of this application, the first structure 50 preferably employs a design with a notch 54 for the adapter 413 to pass through, allowing the sampling terminal 412 to move and deform more smoothly relative to the main circuit board 411 along the first direction X. Furthermore, as... Figure 5 and Figure 6As shown, the first structure 50 also includes a groove 53 provided on the third component 60, located on the side of the notch 54 facing the first component 20. Thus, when the second component 30 is bonded to the first component 20, the adhesive overflowing towards the notch 54 will first flow into the groove 53. Only after the groove 53 is full will the adhesive continue to flow towards the notch 54. In other words, the groove 53 can reduce the amount of adhesive flowing towards the notch 54, reducing the possibility of adhesive overflowing the notch 54 and continuing to flow towards the sampling terminal 412 and the main circuit board 411, thereby improving the effectiveness of the sampling terminal 412 moving and deforming relative to the main circuit board 411 along the first direction X. Furthermore, the slot 53 allows the adapter 413 to be suspended relative to the third component 60 and / or the first structure 50, which helps prevent adhesive from bonding and fixing the adapter 413 to the third component 60 and / or the first structure 50. This reduces the possibility of the adapter 413 breaking directly due to the expansion of the battery cell 10 pulling on it, and improves the effectiveness of transmitting the expansion stress of the battery cell 10 to the sampling terminal 412 through the adapter 413 so that the sampling terminal 412 moves and deforms relative to the main circuit board 411 in the first direction X.

[0063] like Figure 12 As shown, in some embodiments, the first structure 50 is a flange 21 formed by bending the edge of the first component 20 towards the sampling assembly 40. By directly molding the first structure 50 onto the first component 20, the first component 20, while being bonded and fixed to the second component 30, also has the function of preventing glue overflow to the sampling terminal 412. That is to say, this embodiment does not require the addition of extra parts to mold the first structure 50, thereby reducing the number of parts required for assembling and producing the battery device 200, simplifying the design structure of the battery device 200, and saving material costs. Furthermore, in this embodiment, in order to ensure that the remaining parts of the first component 20, except for the connection with the terminal structure 11, maintain insulation performance with the battery cell 10, such as... Figure 1 , Figures 3 to 6 , Figure 9 and Figure 10As shown, the battery device 200 also includes a third component 60, which is an insulating plate made of insulating plastic through vacuum forming. The third component 60 covers the battery cell assembly 100. Furthermore, the third component 60 has clearance holes 61, through which the terminal structures 11 are respectively inserted. The first component 20 is located on the side of the third component 60 facing away from the battery cell 10. Thus, the first component 20 can only be connected to the terminal structures 11 to achieve electrical connection; other parts of the first component 20 are isolated from the battery cell 10 by the third component 60 to achieve insulation. The main circuit board 411 is fixedly mounted on the third component 60. The third component 60 not only provides a fixed mounting position for the sampling component 40, but also provides insulation between the sampling component 40 and the battery cell 10. When the second component 30 is bonded to the first component 20, the adhesive between the second component 30 and the first component 20 is squeezed out and overflows from the edge of the first component 20. The first component 20 has a groove 22 formed in the middle, recessed towards the battery cell 10. Most of the adhesive squeezed between the second component 30 and the first component 20 overflows into the groove 22, while some of the overflowing adhesive flows onto the third component 60, and the rest flows towards the sampling terminal 412. For the portion of adhesive flowing towards the sampling terminal 412, since the first structure 50 is a flange 21 formed by bending the edge of the first component 20 towards the flexible circuit component, the flange 21 directly blocks the flow of adhesive to the sampling terminal 412, reducing the probability that the sampling terminal 412 and the main circuit board 411 are rigidly connected by the cured adhesive. The adapter 413 can be directly soldered to the side of the flange 21 away from the second component 30, and the adapter 413 is electrically connected to the first component 20. Alternatively, the adapter 413 can be locked onto the flange 21 by screws, i.e., the flange 21 has a connection hole for screwing, and the adapter 413 can be electrically connected to the first component 20.

[0064] In the battery device 200 where the first structure 50 is the flange 21 on one side edge of the first component 20, multiple battery cell assemblies 100 are arranged in parallel within the battery device 200. These multiple battery cell assemblies 100 can be connected in series, in parallel, or in a mixed configuration. The third component 60 can simultaneously cover multiple battery cell assemblies 100, such as... Figure 1 , Figure 3 , Figure 5 and Figure 10 As shown, the battery device 200 has only one integrally formed third component 60 that can simultaneously cover the entire battery cell assembly 100. Alternatively, as... Figure 9As shown, the third component 60 consists of multiple pieces, each covering one of the battery cell modules 100 in a one-to-one correspondence. Adjacent third components 60 are joined together to cover all battery cell modules 100. Alternatively, the third component 60 may consist of multiple pieces, each covering at least two adjacent battery cell modules 100. This means one third component 60 covers two or more adjacent battery cell modules 100, and adjacent third components 60 are joined together to cover all battery cell modules 100. Thus, except for the connection point with the terminal structure 11, the first component 20 is isolated from the battery cells 10 by the third component 60, achieving insulation and improving the electrical safety of the battery device 200.

[0065] In some embodiments, the first structure 50 is a strip-shaped protrusion located on the edge region of the second component 30 facing the first component 20, extending along a first direction X. The strip-shaped protrusion and the second component 30 may be integrally formed; alternatively, the strip-shaped protrusion and the second component 30 may be two independent parts assembled by means of adhesive bonding, snap-fitting, screw locking, or other connection methods. In this embodiment, during the process of bonding the second component 30 to the first component 20, adhesive is first applied to the side of the first component 20 facing away from the battery cell assembly 100, and then the second component 30 is pressed onto the first component 20. At this time, the adhesive that is squeezed out between the first component 20 and the second component 30 and flows towards the sampling terminal 412 is directly blocked by the strip-shaped protrusion, reducing the probability that the sampling terminal and the main circuit board are rigidly connected together by the cured adhesive.

[0066] like Figure 4 and Figure 7As shown, in some embodiments, along the first direction X, the sampling terminal 412 has a first end 414 and a second end 415, and the first end 414 of the sampling terminal 412 is integrally formed with the main circuit board 411 (integral forming is one type of mechanical connection). When designing the battery device 200, the direction of the expansion deformation generated when the battery cell 10 expands is from the second end 415 to the first end 414. For example, when placing the battery cell 10 into the housing body 201, the battery cells 10 are placed sequentially from the second end 415 to the first end to form the battery cell assembly 100. The first battery cell 10 placed abuts against the side beam or internal crossbeam of one side of the housing body 201 with its large sidewall 12 facing the second end 415, while the last battery cell 10 placed abuts against the side beam or internal crossbeam of the housing body 201 with its large sidewall 12 facing the first end through a flexible, elastically deformable buffer. The buffer can be, for example, cushioning foam, spring sheet, etc. In this way, the direction of the expansion deformation of the battery cell 10 when it expands is determined to be from the second end 415 to the first end. This makes the direction of the expansion deformation of the battery cell 10 when it expands certain, thereby making the assembly direction of the sampling component 40 relative to the battery cell assembly 100 certain, which is beneficial for positioning and assembling the sampling component 40 and improving assembly efficiency.

[0067] In some embodiments, the first end of the sampling terminal 412 is connected to the main circuit board 411. If there is no connection between the second end 415 of the sampling terminal 412 and the main circuit board 411, then when the movable sampling component 40 is picked up for assembly, the sampling terminal 412 will fall relative to the main circuit board 411 with its first end as the fulcrum under its own gravity, causing the adapter 413 to fall as well. This makes it difficult to align and connect the adapter 413 with the corresponding first component 20, affecting assembly efficiency. In order to quickly and accurately align and connect the adapter 413 with the corresponding first component 20 and improve assembly efficiency, such as... Figure 4 and Figure 7As shown, the second end 415 is connected to the main circuit board 411 through a weak connection structure 416. The connection strength between the weak connection structure 416 and the main circuit board 411 is less than that between the first end 414 and the main circuit board 411, thus causing the weak connection structure 416 to break before the first end 414 when subjected to external force. The second end 415 is connected to the main circuit board 411 through the weak connection structure 416. Both the first end 414 and the second end 415 of the sampling terminal 412 are connected to the main circuit board 411, making the relative position of the sampling terminal 412 and the adapter 413 relative to the main circuit board 411 definite and stable. Therefore, when the sampling assembly 40 is picked up and moved for assembly, the adapter 413 can be quickly and accurately aligned and positioned on the corresponding first component 20, thereby quickly connecting the adapter 413 to the corresponding first component 20 and improving assembly efficiency.

[0068] In some embodiments, such as Figure 8 As shown, the sampling terminal 412 also has a bent section 417 between the first end 414 and the second end 415. The bent section 417 is configured to be at least partially unfolded when the second end 415 moves and deforms relative to the main circuit board 411 with the first end 414 as the fulcrum along the first direction X. Along the second direction Y, the first structure 50 is at least partially disposed between the second component 30 and the bent section 417. The bent section 417 can unfold to accommodate the deformation when the battery cell 10 expands, so that the weak connection structure 416 between the second end 415 and the main circuit board 411 will only break when the bent section 417 is fully unfolded and continues to be pulled by the expansion deformation, thereby improving the reliability of the sampling terminal 412. Furthermore, the length of the first structure 50 extending along the first direction X is greater than or equal to the length of the bent section 417 extending along the first direction X. In addition, along the second direction Y, the bent section 417 and the second component 30 are separated by the first structure 50 at any position, thereby effectively preventing the overflow of adhesive between the first component 20 and the second component 30 from flowing to the sampling terminal 412 and the main circuit board 411, resulting in the sampling terminal 412 and the main circuit board 411 solidifying to form a rigid structure.

[0069] like Figure 1As shown, the battery device 200 also includes a main body 201 and a cover 202, with the cover 202 covering the main body 201 to enclose an assembly space 203. After placing multiple battery cells 10 into the assembly space 203 of the main body 201 to form multiple battery cell assemblies 100, the third component 60 is assembled, and then the first component 20 is electrically connected to the terminal structure 11 to allow the multiple battery cell assemblies 100 to be connected in series, in parallel, or in a mixed configuration. The sampling component 40, battery management module, high-voltage box, and other electrical components are installed, and the sampling connector 42 connected to the main circuit board 411 of the sampling component 40 is plugged into the battery management module. Then, the second component 30 is glued and fixed to the first component 20, and finally the cover 202 is closed on the main body 201 and sealed. In other words, multiple battery cells 10 are arrayed and assembled in the assembly space 203.

[0070] According to a second aspect of the embodiments of this application, embodiments of this application also provide an electrical appliance 400, which includes an electrical load 410.

[0071] Electrical equipment 400 includes, but is not limited to, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft may include, but are not limited to, airplanes, rockets, space shuttles, and spacecraft.

[0072] The electrical equipment 400 also includes a battery device 200 as described above. That is, the electrical equipment 400 uses one battery device 200 or multiple battery devices 200 connected in series, parallel, or a combination thereof, and the electrical load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electrical energy, or to provide electrical energy to the electrical load 410, thereby enabling the electrical load 410 to operate normally.

[0073] Among them, the electrical equipment 400 is an electric vehicle, and it is assembled using a battery device 200, such as Figure 13As shown, the battery device 200 is mounted on the frame 430 of the electric vehicle. The electric vehicle includes the frame 430, a drive motor, and wheels 440. The battery device 200 and the drive motor are both fixedly mounted on the frame 430, and the wheels 440 are rotatably connected to the frame 430. The battery device 200 is electrically connected to the drive motor, and the drive motor is driven by the wheels 440. When the battery device 200 provided in this application supplies power to the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400), the drive motor drives the wheels 440 to rotate, enabling the electric vehicle to drive normally. Furthermore, the electric vehicle includes a control device 420, which is mounted on the frame 430 and electrically connected to the battery device 200. The control device 420 is used to control and monitor the charging and discharging status of the battery device 200. In some electric vehicles, the battery housing of the battery device 200 can be part of the chassis structure of the electric vehicle. For example, a portion of the battery box can be at least part of the floor of the electric vehicle, or a portion of the battery box can be at least part of the crossbeams and longitudinal beams of the electric vehicle.

[0074] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A plurality of battery cell assemblies, the battery cell assembly comprising a plurality of battery cells arranged along a first direction, the plurality of battery cell assemblies being distributed along a second direction, the battery cell comprising a first surface, the first direction intersecting the second direction; Multiple first components, each first component being located on the first surface and used for electrically connecting different battery cells, wherein multiple first components within the same battery cell assembly are arranged to form a first component column; The second component is located on the first surface and connected to the first component column; A sampling assembly is located on the first surface and on one side of the second component along the second direction. The sampling assembly includes a main circuit board and sampling terminals. The sampling terminals have a first end and a second end that are connected to each other. The first end is mechanically and electrically connected to the main circuit board. The sampling terminal is configured to be movable and deformable relative to the main circuit board with the first end as a fulcrum along the first direction. The second end is used for electrical connection with the first component. The battery device further includes a first structure along the second direction, the first structure being at least partially disposed between the second component and the sampling terminal, the second component being connected to the upper surface of the first component away from the first surface by an adhesive, and the first structure being higher than the upper surface of the second component away from the first surface.

2. The battery device according to claim 1, characterized in that, The battery device further includes a third component, which is made of insulating material and is disposed on the first surface. The first structure is a partial structure of the third component.

3. The battery device according to claim 2, characterized in that, The first structure is configured to be integrally formed with the third component.

4. The battery device according to claim 3, characterized in that, The first structure is configured to be formed by vacuum forming.

5. The battery device according to claim 4, characterized in that, The first structure includes a rib that extends along the first direction.

6. The battery device according to claim 1, characterized in that, The first structure is an independently molded adhesive strip; The battery device further includes a third component, which is made of insulating material. The third component is disposed on the first surface, and the first component is located on the side of the third component that is away from the first surface. The first structure is bonded to the side of the third component that is away from the first surface; or, the first structure is bonded to the first surface.

7. The battery device according to any one of claims 2-6, characterized in that, When the battery device includes the third component, the third component further includes a second structure configured as a recessed groove facing the first surface relative to the first structure and for receiving the first component.

8. The battery device according to any one of claims 1-6, characterized in that, The sampling terminal also has a bent section between the first end and the second end, the bent section being configured to be at least partially unfolded when the second end moves and deforms relative to the main circuit board with the first end as a fulcrum along the first direction, and along the second direction, the first structure is at least partially disposed between the second component and the bent section.

9. The battery device according to claim 8, characterized in that, The length of the first structure extending along the first direction is greater than or equal to the length of the bent segment extending along the first direction, and along the second direction, the first structure separates the bent segment and the second component at any position.

10. The battery device according to claim 1, characterized in that, The sampling component further includes an adapter, and the first structure includes a notch extending along the second direction, the adapter passing through the notch to connect the first component and the second end.

11. The battery device according to claim 10, characterized in that, The battery device further includes a third component made of insulating material, which is disposed on the first surface. The first structure also includes a groove disposed on the third component, which is located on the side of the notch facing the first component along the second direction.

12. An electrical appliance, characterized in that, The electrical equipment includes the battery device as described in any one of claims 1-11.

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