Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body, a plurality of battery monomers and a depression bar structure, and a mounting cavity is formed in the box body; the plurality of battery monomers are arranged in the mounting cavity, the plurality of battery monomers are arranged in a plurality of columns in a first direction and are arranged in a plurality of rows in a second direction, and first gaps are formed between the bars arranged on two adjacent columns of battery monomers; the pressing strip structure comprises an insulating main body and a connection reinforcing piece, the insulating main body is provided with a pressing part and an isolating part, two ends of the pressing part are respectively pressed to the bars on the two adjacent rows of battery monomers, the isolating part is connected to the pressing part, the isolating part extends along the third direction and extends into the first gap, and the connection reinforcing piece is at least partially embedded in the pressing part and is connected to the box body. According to the technical scheme provided by the invention, the risk of easy arcing and sparking between the adjacent bars on the two adjacent rows of battery monomers in the power battery pack is 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 equipment. Background Art

[0002] In the field of new energy batteries, due to the market demand for high charging efficiency and high energy density, power battery packs tend to use high-voltage platforms, which leads to large overcurrent requirements for the bars on the battery cells. At the same time, the bars are compactly arranged due to the close arrangement of the two adjacent columns of battery cells, and there is a risk of arcing and ignition between adjacent bars. Utility Model Content

[0003] The main purpose of the present application is to provide a battery device and an electrical device, which are intended to reduce the risk of arcing and ignition between adjacent tabs on two adjacent columns of battery cells in a power battery pack.

[0004] In a first aspect, the battery device proposed in the present application comprises:

[0005] A box body is formed with a mounting cavity;

[0006] A plurality of battery cells are arranged in the installation cavity, the plurality of battery cells are arranged in a plurality of columns in a first direction and in a plurality of rows in a second direction, and a first gap is formed between the tabs arranged on the battery cells in two adjacent columns; and

[0007] A pressure strip structure, comprising an insulating body and a connection reinforcement member, wherein the insulating body has a pressing portion and an isolating portion, wherein two ends of the pressing portion are respectively pressed to the bars on the battery cells of two adjacent columns, the isolating portion is connected to the pressing portion, the isolating portion extends along a third direction and extends into the first gap, and the connection reinforcement member is at least partially embedded in the pressing portion and connected to the box body;

[0008] The first direction, the second direction and the third direction intersect each other.

[0009] In the technical solution provided by the present application, the connection reinforcement of the pressure strip structure is connected to the box body and is also at least partially embedded in the pressing part of the insulating body. The connection reinforcement can be pressed to the bar pieces on the battery cells by the pressing part, so that the two adjacent columns of battery cells are pressed and stabilized, limiting the movement of the battery cells in the third direction, improving the main frequency of the battery device, and effectively alleviating the problem of the battery device being prone to resonance during its service life; not only that, the pressing part is pressed to the bar pieces at both ends along the first direction, and the isolation part connected in the middle can extend into the first gap to isolate the two adjacent bar pieces in space, which can play a role in increasing the creepage distance, effectively reducing the risk of arcing and ignition between adjacent bar pieces on two adjacent columns of battery cells, and improving the reliability of the battery device.

[0010] In one embodiment, a second gap is formed between two adjacent rows of battery cells;

[0011] The isolation portion extends into the second gap.

[0012] Among them, by utilizing the objectively existing second gap between two adjacent columns of battery cells and setting the isolation part to extend into the second gap, the length of the isolation part along the third direction can be further increased, thereby improving the creepage distance between two adjacent bars, and further improving the insulation protection performance of the pressure strip structure for the bars.

[0013] In one embodiment, the isolation portion abuts against a side wall of the battery cell corresponding to the second gap.

[0014] Among them, by setting the isolation part to abut against the side wall of the battery cell corresponding to the second gap, two adjacent columns of battery cells can be supported, thereby limiting the movement of the battery cells along the first direction, further improving the main frequency of the battery device, and further reducing the problem of resonance that may occur in the battery device during its service life.

[0015] In one embodiment, on both sides of the first gap, a creepage distance between two adjacent bars is greater than 15 mm.

[0016] Among them, the size of the creepage distance between two adjacent bars is mainly affected by the size of the isolation part. By designing the structural size of the isolation part, the creepage distance between two adjacent bars can be increased by more than 15mm, ensuring the insulation protection performance of the layering structure for the bars.

[0017] In one embodiment, along the third direction, a projection of the connection reinforcement member and a projection of the tab are at least partially overlapped.

[0018] Among them, after the connecting reinforcement is connected to the box body, it will also apply a pressing force to the bar piece in the third direction through the pressing part, and the connecting reinforcement will at least partially overlap with the bar piece along the third direction. The pressing force can be applied vertically to the bar piece, preventing the pressing part from deforming when transmitting the pressing effect between the connecting reinforcement and the bar piece, thereby ensuring the stable pressing effect of the pressure strip structure on the bar piece.

[0019] In one embodiment, the pressing portion and the tab are connected via structural adhesive.

[0020] Among them, the holding part is connected to the bar through structural adhesive, and the battery cell can be integrally connected to the box body through the pressure strip structure, which improves the stability of the internal structure of the battery device and effectively improves the main frequency of the battery device. At the same time, through the connection between the connecting reinforcement and the box body in the pressure strip structure, effective tensile force limitation can be formed on multiple battery cells, at least the expansion and deformation of the battery cells can be resisted.

[0021] In one embodiment, the bar sheet is formed with a receiving portion, and the receiving portion abuts against the top cover of the battery cell;

[0022] The pressing portion is pressed to the receiving portion of the bar sheet;

[0023] The first gap is formed between two adjacent receiving portions.

[0024] Among them, the pressing part abuts against the top cover of the battery cell through its own receiving part. When the pressing part of the pressure strip structure presses the receiving part along the third direction, the pressing force applied to the receiving part can be directly transmitted to the top cover of the battery cell, reducing the pressure between the tab and the pole of the battery cell, and ensuring the reliability of the connection between the tab and the pole.

[0025] In one embodiment, the connection reinforcement comprises a steel strip.

[0026] Among them, compared with other types of connection reinforcements (such as aluminum strips), steel strips have the advantages of high connection strength and low cost. Using steel strips as connection reinforcements can not only ensure the stable pressure of the pressure strip structure on the bar, but also control the overall cost of the battery device.

[0027] In one embodiment, along the second direction, the middle section of the connection reinforcement member is embedded in the pressing portion, and both ends extend out of the pressing portion to form connection ends, and the connection ends are connected to the box body.

[0028] Among them, the connecting reinforcement is connected to the side wall structure of the box body through the connecting ends extending from the pressing parts at both ends. Since the side wall structure of the box body usually has a higher structural strength, the connecting reinforcement connected to the side wall structure can obtain a relatively stable force point, thereby being able to exert a more stable pressing force on the battery cell.

[0029] In one embodiment, the connecting end is connected to the box body through a locking structure.

[0030] Among them, the locking structure can realize the detachable connection between the connecting end of the connecting reinforcement and the box body, which is conducive to the disassembly and assembly of the pressure strip structure.

[0031] In a second aspect, the present application further proposes an electrical device, which includes the above-mentioned battery device, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 A simplified structural diagram of an embodiment in which the electric device provided in this application is a vehicle;

[0034] Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the three-dimensional structure of a battery cell and a pressure strip structure in a battery device provided in the present application;

[0036] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the local A in the middle;

[0037] Figure 5 for Figure 3 A schematic diagram of the top view of the battery cell and the layering structure;

[0038] Figure 6 for Figure 5 Schematic diagram of the partial cross-section structure of the middle BB;

[0039] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the local C in the middle;

[0040] Figure 8 for Figure 7 Schematic diagram of the partial structure of the middle layering strip structure and the bar.

[0041] Description of Figure Numbers:

[0042] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0043] 1. Box body, 1a, installation cavity; 2. Battery cell; 2a, second gap; 3. Bar sheet; 3a, first gap; 31, receiving portion; 4. Layering structure; 41, insulating body; 411, holding portion; 412, isolation portion; 42, connection reinforcement member; 421, connection end; 421a, locking hole; 5. Structural adhesive; 6. Cover plate;

[0044] L, creepage distance; X, first direction; Y, second direction; Z, third direction.

[0045] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] 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.

[0053] In the field of new energy batteries, due to the market demand for high charging efficiency and high energy density, power battery packs tend to use high-voltage platforms, which leads to large overcurrent requirements for the bars on the battery cells, making the area of ​​the bars larger. At the same time, multiple battery cells are closely arranged in rows and columns. Since the poles of the battery cells are generally distributed at both ends of the length direction of the top cover, and the positions of the bars correspond to the positions of the poles, the bars are compactly arranged with the close arrangement of two adjacent columns of battery cells. This leads to insufficient electrical clearance (the shortest distance between two adjacent conductors measured along the air) and creepage distance (the shortest distance between two adjacent conductors measured along the insulating surface) between adjacent large-area bars, which makes it easy for arcing and ignition to occur between adjacent large-area bars during power supply of the power battery pack.

[0054] Analyzing the above problems, the close spacing between adjacent bars is the main reason for the risk of arcing and sparking. However, since the position of the battery poles is difficult to change and the battery cells need to be closely arranged to meet the requirements of high energy density, it is difficult to improve the existing power battery pack by increasing the spacing between adjacent bars. The current common practice is to add insulation protection to the bars separately, such as spraying an insulating coating on the surface of the bars to improve their insulation effect. However, this solution requires the addition of additional production processes, resulting in reduced production efficiency, and on the other hand, it will also lead to an increase in the overall cost of the power battery pack. Therefore, technicians are urgently in need of finding other solutions.

[0055] In the production process of power battery packs, in order to increase the main frequency of the power battery pack and prevent it from resonating during its life cycle, a pressure strip structure is usually required to be set above the battery cells therein. The existing pressure strip structure is mainly pressed on the top of the battery cell, and both ends are connected to the box of the power battery pack to limit the movement of the battery cell in the box. Analysis shows that the pressure strip structure can be used to press it between adjacent bars, and the adjacent bars are separated by forming an isolation part thereon, thereby increasing the creepage distance between the two bars, which can also play a role in insulation protection.

[0056] The battery device disclosed in the embodiment of the present application can be used to provide electric energy for electric devices, wherein the electric devices can be but not limited to battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0057] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0058] Please refer to Figure 1 , Figure 1 The electrical equipment provided for this application is a simplified structural diagram of an embodiment of a vehicle. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can 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 device 100 to power the motor 300, for example, for the starting, navigation and driving of the vehicle 1000. Working power requirements.

[0059] In some embodiments of the present application, the battery device 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.

[0060] When the battery device 100 provided in the present application is applied to electrical equipment, the risk of arcing and ignition between adjacent tabs on two adjacent columns of battery cells in a power battery pack can at least be reduced.

[0061] To facilitate understanding of the battery device 100 provided in the present application, the following is a description with reference to the accompanying drawings, wherein: Figure 2 A schematic diagram of an exploded structure of a battery device according to an embodiment of the present application; Figure 3A schematic diagram of the three-dimensional structure of a battery cell and a pressure strip structure in a battery device provided in the present application; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the local A in the middle; Figure 5 for Figure 3 A schematic diagram of the top view of the battery cell and the layering structure; Figure 6 for Figure 5 Schematic diagram of the partial cross-section structure of the middle BB; Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the local C in the middle; Figure 8 for Figure 7 Schematic diagram of the partial structure of the middle layering strip structure and the bar.

[0062] See also Figures 2 to 8 In one embodiment of the present application, the battery device 100 includes a box body 1, a plurality of battery cells 2 and a pressure strip structure 4, the box body 1 is formed with an installation cavity 1a; the plurality of battery cells 2 are arranged in the installation cavity 1a, the plurality of battery cells 2 are arranged in a plurality of rows in a first direction X, and are arranged in a plurality of rows in a second direction Y, a first gap 3a is formed between the bars 3 arranged on two adjacent rows of battery cells 2; the pressure strip structure 4 includes an insulating body 41 and a connecting reinforcement member 42, the insulating body 41 has a pressing portion 411 and an isolating portion 412, the two ends of the pressing portion 411 are respectively pressed to the bars 3 on two adjacent rows of battery cells 2, the isolating portion 412 is connected to the pressing portion 411, the isolating portion 412 extends along a third direction Z and extends into the first gap 3a, the connecting reinforcement member 42 is at least partially embedded in the pressing portion 411 and connected to the box body 1; wherein the first direction X, the second direction Y and the third direction Z intersect each other.

[0063] It should be noted that the first direction X, the second direction Y and the third direction Z mentioned in the embodiment of the present application are three directions that intersect each other in three-dimensional space, and the angle between two adjacent directions is usually 90 degrees, that is, the first direction X, the second direction Y and the third direction Z are perpendicular to each other, but it is not limited to this, and the angle between two adjacent directions may also be any angle value between 80 degrees and 100 degrees; after the battery device 100 is correctly installed on the electrical equipment, its third direction Z usually coincides with the up and down direction of the electrical equipment.

[0064] The "box 1" is the main loading component of the battery device 100. The battery device 100 is installed on the electrical equipment through the box 1, and multiple battery cells 2 are installed through the installation cavity 1a of the box 1. The box 1 can be set as an integral body to directly form the installation cavity 1a, or it can be set in a split splicing manner. For example, the box 1 includes a bottom plate and a surrounding frame, and the surrounding frame is set on the bottom plate to define the installation cavity 1a; the battery cell 2 can be completely hidden in the installation cavity 1a. In this case, the side wall of the installation cavity 1a is at least higher than the battery cell 2. The battery cell 2 can also be partially hidden in the installation cavity 1a. In this case, the side wall of the installation cavity 1a is lower than the battery cell 2. Regardless of whether the side wall of the installation cavity 1a is high or low, the box 1 can provide protection for the battery cell 2 at least from the surrounding side and the bottom side. The battery device 100 usually also includes a cover plate 6, which is set on the box 1 to cover the installation cavity 1a.

[0065] The battery device 100 includes a plurality of battery cells 2, which are arranged in a plurality of columns in a first direction X and in a plurality of rows in a second direction Y. The battery cells 2 in the same column can be connected in series, in parallel, or in mixed connection by connecting the tabs 3 with the poles, wherein mixed connection means that the plurality of battery cells 2 are connected in series and in parallel; wherein the specific number of columns and rows of the battery cells 2 depends on the actual specifications and use of the battery device 100, and there are many possibilities, wherein the layering structure 4 usually has a certain size in the second direction Y, and its size is related to the arrangement of the battery cells 2, for example, in Figure 2 In the embodiment, a plurality of battery cells 2 are arranged in two rows in a first direction X and in thirteen rows in a second direction Y. The layering structure 4 is extended in the second direction Y. A plurality of battery cells 2 in the same row are arranged in series, and battery cells 2 in different rows can be connected in series or in parallel. When the battery cells 2 are arranged Figure 2 When the aluminum shell battery cells shown in the figure are arranged, the aluminum shell battery cells in the same row are usually attached to each other through their large surfaces, and the aluminum shell battery cells in adjacent rows are usually opposite to each other through their side surfaces; each battery cell 2 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 2 can be cylindrical, flat, rectangular or other shapes.

[0066] See also Figures 5 to 8 The "first gap 3a" is a feature defined by adjacent bars 3 on two adjacent columns of battery cells 2. The size of the first gap 3a (that is, the distance between the bars 3) affects the insulation performance between the bars 3. Since the multiple battery cells 2 are arranged in multiple rows in the second direction Y, the first gap 3a can be understood as extending along the second direction Y and existing at intervals along the interval arrangement of the bars 3 in the second direction Y.

[0067] The layering structure 4 includes an insulating body 41, the main function of which is insulation protection. It usually has insulation resistance, anti-puncture ability, heat resistance and certain mechanical properties. Its material usually includes quartz, ceramic, rubber or other types of insulating composite materials, etc., which is not limited in this embodiment; the insulating body 41 includes a holding portion 411 and an isolating portion 412, so the holding portion 411 and the isolating portion 412 both have insulation protection performance. The holding portion 411 and the isolating portion 412 can be integrally formed with the same material, or can be separately formed with different materials and connected together. Among them, since the holding portion 411 needs to be held between two adjacent rows of electric On the bar sheet 3 of the battery cell 2, the holding portion 411 usually has a certain size in the first direction X, and the isolation portion 412 is arranged on the holding portion 411, which can be understood as being arranged in the middle of the holding portion 411 along the first direction X; since the isolation portion 412 extends along the third direction Z and extends into the first gap 3a, it can be understood that the isolation portion 412 is arranged at a side of the holding portion 411 close to the battery cell 2; the embodiment of the present application does not limit the specific structure of the holding portion 411 and the isolation portion 412, but considering that the pressure strip structure 4 is used for a battery device 100 with a higher energy density, in order to occupy as little installation space as possible, the holding portion 411 is usually as follows Figure 7 The arrangement shown is a flat structure.

[0068] The pressure strip structure 4 includes a connecting reinforcement member 42, which is at least partially embedded in the holding portion 411 and connected to the box body 1. It can be understood that the connecting reinforcement member 42 is completely embedded in the holding portion 411, and extends out of the holding portion 411 through other extension structures, and is indirectly connected to the box body 1, or it can be understood that the connecting reinforcement member 42 is only partially embedded in the holding portion 411, and is directly connected to the box body 1 through its portion exposed to the holding portion 411; the connection point between the connecting reinforcement member 42 and the box body 1 can be at the end of the connecting reinforcement member 42 along the second direction Y, or at the middle of the connecting reinforcement member 42 along the second direction Y, which is not specified in this embodiment. Definition: The specific function of the connecting reinforcement 42 is to connect the insulating body 41 to the box body 1, so as to apply a stable pressing force to the bar 3 through the pressing portion 411. The connecting reinforcement 42 can enhance the overall strength of the pressure strip structure 4 while playing a connecting role. There are many possibilities for the specific material of the connecting reinforcement 42, including but not limited to steel and aluminum. The connecting reinforcement 42 is embedded in the pressing portion 411 in an "embedded" manner, which can be an integral connection or an interference fit connection. The connecting reinforcement 42 is connected to the box body 1, and its specific connection method can be divided into an integral connection and a detachable connection, which is not limited in this embodiment.

[0069] In the technical solution provided by the present application, the connection reinforcement member 42 of the pressure strip structure 4 is connected to the box body 1 and is also at least partially embedded in the holding portion 411 of the insulating body 41. The connection reinforcement member 42 can be pressed to the bar piece 3 on the battery cell 2 through the holding portion 411, so that the two adjacent columns of battery cells 2 are pressed and stabilized, and the movement of the battery cells 2 in the third direction Z is limited, the main frequency of the battery device 100 is improved, and the problem of the battery device 100 being prone to resonance during its service life is effectively alleviated; not only that, the holding portion 411 is pressed to the bar piece 3 at both ends along the first direction X, and the isolation portion 412 connected in the middle can extend into the first gap 3a to isolate the two adjacent bar pieces 3 in space, which can play a role in increasing the creepage distance L, effectively reducing the risk of arcing and ignition between the adjacent bar pieces 3 on the two adjacent columns of battery cells 2, and improving the reliability of the battery device 100.

[0070] For further information, see Figure 4 , Figure 6 and Figure 7 In some embodiments, a second gap 2 a is formed between two adjacent columns of battery cells 2 ; the isolation portion 412 extends into the second gap 2 a .

[0071] It should be noted that, in order to facilitate the placement of multiple columns of battery cells 2 into the installation cavity 1a of the box body 1, the size of the installation cavity 1a along the first direction X is usually larger than the overall size of the multiple columns of battery cells 2 along the first direction X. This is also the objective reason for the formation of a second gap 2a between two adjacent columns of battery cells 2; generally speaking, the second gap 2a formed between two adjacent columns of battery cells 2 usually corresponds to the first gap 3a formed between the upper tabs 3 of two adjacent columns of battery cells 2 in the third direction Z. After extending into the first gap 3a, the isolation portion 412 can continue to extend into the second gap 2a toward the third direction Z.

[0072] According to the above technical solution, by utilizing the objectively existing second gap 2a between two adjacent columns of battery cells 2, the isolation portion 412 is set to extend into the second gap 2a, which can further increase the length of the isolation portion 412 along the third direction Z, thereby improving the creepage distance L between two adjacent bars 3, and further improving the insulation protection performance of the layering structure 4 for the bars 3.

[0073] See also Figure 7 In some embodiments, the isolation portion 412 abuts against the side wall of the battery cell 2 corresponding to the second gap 2 a.

[0074] It should be noted that the “second gap 2a” is formed between the opposite side walls of two adjacent rows of battery cells 2, for example, Figure 3In the figure, the battery cell 2 includes an aluminum shell battery cell, and the second gap 2a is formed between the opposite side walls of two adjacent columns of aluminum shell battery cells; the isolation portion 412 abuts against the side wall of the battery cell 2. It can be understood that the isolation portion 412 is assembled into the second gap 2a by interference fit and can apply a certain force to the side wall of the battery cell 2.

[0075] According to the above technical solution, by setting the isolation portion 412 to abut against the side wall of the battery cell 2 corresponding to the second gap 2a, two adjacent columns of battery cells 2 can be supported, thereby limiting the movement of the battery cells 2 along the first direction X, further improving the main frequency of the battery device 100, and further reducing the problem of resonance that may occur in the battery device 100 during its service life.

[0076] In some embodiments, on both sides of the first gap 3 a , the creepage distance L between two adjacent bars 3 is greater than 15 mm.

[0077] It should be noted that “both sides of the first gap 3a” refers to both sides of the first gap 3a along the first direction X. Figure 8 Explain the creepage distance L. Figure 8 In the figure, the creepage distance L of the bar 3 on the left and right sides of the isolation part 412 is indicated by the dotted line, and its specific value is the sum of twice the straight-line distance from the bar 3 to the isolation part 412, twice the vertical distance from the bar 3 to the bottom of the isolation part 412, and the width of the isolation part 412.

[0078] According to the above technical solution, the size of the creepage distance L between two adjacent bars 3 is mainly affected by the size of the isolation part 412. By designing the structural size of the isolation part 412, the creepage distance L between two adjacent bars 3 can be increased by more than 15 mm, ensuring the insulation protection performance of the layering structure 4 for the bars 3.

[0079] See also Figure 7 and Figure 8 In one embodiment, along the third direction Z, the projection of the connecting reinforcement 42 and the projection of the bar sheet 3 are at least partially overlapped.

[0080] It should be noted that the third direction Z also refers to the direction of the pressing force applied by the pressing portion 411 to the flap 3; “the projection of the connecting reinforcement 42 and the projection of the flap 3 are at least partially overlapped” can be understood as the connecting reinforcement 42 can block part of the structure of the flap 3 in the third direction Z, or can completely block the flap 3; since there is an overlapping area between the connecting reinforcement 42 and the flap 3, the pressing force can act vertically on the flap 3 in the overlapping area.

[0081] According to the above technical solution, after the connection reinforcement 42 is connected to the box body 1, it will also apply a pressing force toward the third direction Z to the flap 3 through the pressing portion 411, and the connection reinforcement 42 will at least partially overlap with the flap 3 along the third direction Z. The pressing force can be applied vertically to the flap 3, preventing the pressing portion 411 from deforming when transmitting the pressing effect between the connection reinforcement 42 and the flap 3, thereby ensuring the stable pressing effect of the pressure strip structure 4 on the flap 3.

[0082] In some embodiments, the pressing portion 411 and the bar sheet 3 are connected via a structural adhesive 5 .

[0083] It should be noted that there are many types of structural adhesive 5, such as epoxy resin structural adhesive and polyurethane structural adhesive. Among them, epoxy resin structural adhesive has good high temperature resistance and can maintain chemical stability at 121 degrees Celsius or even 204 degrees Celsius. At the same time, epoxy resin structural adhesive has good bonding performance to most materials.

[0084] According to the above technical solution, the holding portion 411 is connected to the bar 3 through the structural adhesive 5, and the battery cell 2 can be integrally connected to the box body 1 through the layering structure 4, thereby improving the stability of the internal structure of the battery device 100 and effectively improving the main frequency of the battery device 100. At the same time, through the connection between the connecting reinforcement 42 in the layering structure 4 and the box body 1, an effective tensile force limitation can be formed on multiple battery cells 2, at least the expansion and deformation of the battery cells 2 can be resisted.

[0085] The tab 3 is usually directly welded to the pole of the battery cell 2. The above embodiment does not limit the connection relationship between the tab 3 and the main structure of the battery cell 2. Figure 3 , Figure 6 and Figure 7 In some embodiments, the tab 3 is formed with a receiving portion 31, and the receiving portion 31 abuts against the top cover of the battery cell 2; the pressing portion 411 presses to the receiving portion 31 of the tab 3; and the first gap 3a is formed between two adjacent receiving portions 31.

[0086] It should be noted that the battery cell 2 usually has a top cover, and its pole passes through the top cover from the inside to the outside, and is thus welded together with the tab 3. The tab 3 is generally connected to the pole of the battery cell 2 through its main body, and the main body is usually higher than the top cover of the battery cell 2. "The receiving portion 31 of the tab 3 abuts against the top cover of the battery cell 2" usually means that the tab 3 also has a local portion that is concave toward the top cover of the battery cell 2, and the receiving portion 31 is usually insulated from the top cover of the battery cell 2.

[0087] According to the above technical solution, the pressing portion 411 is abutted against the top cover of the battery cell 2 through its own receiving portion 31. When the pressing portion 411 of the pressure strip structure 4 presses the receiving portion 31 along the third direction Z, the pressing force applied to the receiving portion 31 can be directly transmitted to the top cover of the battery cell 2, thereby reducing the pressure between the tab 3 and the pole of the battery cell 2 and ensuring the reliability of the connection between the tab 3 and the pole.

[0088] In some embodiments, the connection reinforcement 42 comprises a steel strap.

[0089] According to the above technical solution, compared with other types of connection reinforcement members 42 (such as aluminum strips), steel strips have the advantages of high connection strength and low cost. Using steel strips as connection reinforcement members 42 can not only ensure the stable pressing of the pressure strip structure 4 on the bar 3, but also control the overall cost of the battery device 100.

[0090] In some embodiments, along the second direction Y, the middle section of the connection reinforcement member 42 is embedded in the pressing portion 411 , and both ends extend out of the pressing portion 411 to form connection ends 421 , which are connected to the box body 1 .

[0091] It should be noted that since the multiple battery cells 2 are arranged in multiple rows in the second direction Y, the first gap 3a also extends in the second direction Y. Therefore, the pressing portion 411 also needs to extend in the second direction Y, and the connecting reinforcement member 42 needs to at least apply a pressing force to each local position of the pressing portion 411 in the second direction Y; in this embodiment, the connecting reinforcement member 42 extends along the second direction Y, and the pressing portion 411 extends out at both ends in the second direction Y to form a pressing end.

[0092] According to the above technical solution, the connection reinforcement 42 is connected to the side wall structure of the box body 1 through the connection ends 421 extending relative to the pressing parts 411 at both ends. Since the side wall structure of the box body 1 usually has a higher structural strength, the connection reinforcement 42 connected to the side wall structure can obtain a relatively stable force point, thereby being able to exert a more stable pressing force on the tab 3 on the battery cell 2.

[0093] Furthermore, in some embodiments, the connection end 421 is connected to the box body 1 through a locking structure.

[0094] It should be noted that there are many specific types of locking structures, among which the most common locking structures include bolt locking structures and cable tie locking structures, wherein the cable tie locking structure generally includes a cable tie and locking holes 421a set on the connecting structure and the connected structure. The cable tie passes through the locking holes 421a in the connecting structure and the connected structure, and then the cable tie is tightened to lock the connecting structure and the connected structure. Regardless of the type of locking structure, it can generally be understood as a detachable connection.

[0095] According to the above technical solution, the connection end 421 of the connection reinforcement member 42 can be detachably connected to the box body 1 through the locking structure, which is conducive to the disassembly and assembly of the pressure strip structure 4.

[0096] Specifically, see Figure 4 A locking hole 421a is formed on the connecting end 421, and by using the locking hole 421a to set a bolt or a cable tie, it can be connected to the beam structure of the box body 1. Generally speaking, the beam structure of the box body 1 usually includes two side beams opposite to each other along the first direction X, and two expansion beams opposite to each other along the second direction Y. The connecting end 421 is usually connected to the expansion beam of the box body 1.

[0097] The present application also proposes an electric device, which includes a battery device 100, and the battery device 100 is used to provide electric energy. The specific structure of the battery device 100 refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device 100 is used to provide electric energy to the electric device, and the electric device includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid vehicles and extended-range vehicles, and can also include aircraft such as electric drones and electric passenger aircraft.

[0098] The present application proposes a battery device 100, which includes a box body 1, a plurality of battery cells 2 and a pressure strip structure 4. The box body 1 is formed with a mounting cavity 1a; the plurality of battery cells 2 are arranged in the mounting cavity 1a, the plurality of battery cells 2 are arranged in a plurality of rows in a first direction X, and in a plurality of rows in a second direction Y, a second gap 2a is formed between two adjacent rows of battery cells 2, and a first gap 3a is formed between the tabs 3 arranged on the two adjacent rows of battery cells 2; the pressure strip structure 4 includes an insulating body 41 and a connecting reinforcement 42, the insulating body 41 has a pressing portion 411 The two ends of the holding portion 411 are respectively held and connected to the bars 3 on the two adjacent columns of battery cells 2 by means of structural adhesive 5. The isolating portion 412 is connected to the holding portion 411. The isolating portion 412 extends along the third direction Z and passes through the first gap 3a and extends into the second gap 2a, so that the creepage distance L between two adjacent bars 3 is greater than 15 mm. The connecting reinforcement 42 is embedded in the holding portion 411 in the middle section along the second direction Y, and the two ends extend out of the holding portion 411 to form connecting ends 421, which are connected to the beam structure of the box body 1 through a locking structure.

[0099] 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 is formed with a mounting cavity; A plurality of battery cells are arranged in the installation cavity, the plurality of battery cells are arranged in a plurality of columns in a first direction and in a plurality of rows in a second direction, and a first gap is formed between the tabs arranged on the battery cells in two adjacent columns; and A pressure strip structure, comprising an insulating body and a connection reinforcement member, wherein the insulating body has a pressing portion and an isolating portion, wherein two ends of the pressing portion are respectively pressed to the bars on the battery cells of two adjacent columns, the isolating portion is connected to the pressing portion, the isolating portion extends along a third direction and extends into the first gap, and the connection reinforcement member is at least partially embedded in the pressing portion and connected to the box body; The first direction, the second direction and the third direction intersect each other.

2. The battery device according to claim 1, characterized in that A second gap is formed between two adjacent rows of battery cells; The isolation portion extends into the second gap.

3. The battery device according to claim 2, characterized in that: The isolation portion abuts against a side wall of the battery cell corresponding to the second gap.

4. The battery device according to claim 1, wherein: On both sides of the first gap, the creepage distance between two adjacent bars is greater than 15 mm.

5. The battery device according to claim 1, wherein: Along the third direction, the projection of the connection reinforcement member and the projection of the flap are at least partially overlapped.

6. The battery device according to any one of claims 1 to 5, characterized in that: The pressing portion and the bar sheet are connected via structural adhesive.

7. The battery device according to any one of claims 1 to 5, characterized in that: The bar sheet is formed with a receiving portion, and the receiving portion abuts against the top cover of the battery cell; The pressing portion is pressed to the receiving portion of the bar sheet; The first gap is formed between two adjacent receiving portions.

8. The battery device according to any one of claims 1 to 5, characterized in that: The connection reinforcement comprises a steel strip.

9. The battery device according to any one of claims 1 to 5, characterized in that: Along the second direction, the middle section of the connection reinforcement member is embedded in the pressing portion, and both ends extend out of the pressing portion to form connection ends, and the connection ends are connected to the box body.

10. The battery device according to claim 9, characterized in that The connecting end is connected to the box body through a locking structure.

11. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 10, wherein the battery device is used to provide electrical energy.

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