Battery device, energy storage device, energy storage system and charging network

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device, an energy storage device, an energy storage system and a charging network, the battery device comprises a box body and a battery monomer, and the battery monomer comprises a shell and a first pressure relief structure arranged on the shell; the integrated busbar is accommodated in the accommodating space, the integrated busbar comprises a bracket connected to the shell, and a groove is formed in one side, deviating from the battery monomers, of the bracket; the integrated busbar further comprises a first heat insulation plate arranged on the side, away from the battery monomers, of the support, and the first heat insulation plate covers the groove and forms a flow guide channel. The support is provided with a through hole corresponding to the first pressure relief structure. According to the battery device provided by the embodiment of the invention, the groove is formed in one side, deviating from the battery monomers, of the integrated busbar and is matched with the first heat insulation plate to form the flow guide channel, so that high-temperature flue gas and impurities generated by thermal runaway of the battery monomers are guided to flow to the side part of the battery device; the risk that high-temperature flue gas and impurities generated by thermal runaway damage other battery monomers and other structures is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, an energy storage device, an energy storage system and a charging network. BACKGROUND

[0002] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0003] In the current battery device, the high-temperature flue gas and impurities generated by the thermal runaway of the battery monomer are usually directly discharged into the box body of the battery device. The high-temperature flue gas is easy to cause damage to other structures in the box body, and the impurities are easy to deposit on the electric connection structure such as the gasket and cause the situation of sparking and short circuit. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device, an energy storage device, an energy storage system and a charging network, which can alleviate the problem of damage to other structures in the battery device caused by thermal runaway of the battery monomer.

[0005] In the first aspect, some embodiments of the present application provide a battery device, comprising:

[0006] The box body comprises a frame structure, a top cover and a bottom plate connected to the frame structure, the frame structure has an accommodation space provided through along a first direction, and the top cover and the bottom plate are connected to both sides of the frame structure along the first direction; the battery monomer is accommodated in the accommodation space, and the battery monomer comprises an outer shell and a first pressure relief structure provided on the outer shell; the integrated busbar is accommodated in the accommodation space, and the integrated busbar comprises a support connected to the outer shell, the side of the support away from the battery monomer is provided with a groove extending along a second direction, and the second direction is perpendicular to the first direction; the integrated busbar further comprises a first heat insulation plate provided on the side of the support away from the battery monomer, the first heat insulation plate covers the groove and forms a flow guide channel; a through hole corresponding to the first pressure relief structure is provided on the support, and the through hole is in communication with the flow guide channel.

[0007] In the technical scheme of the present embodiment, the groove is provided on the side of the integrated busbar away from the battery monomer, and the flow guide channel is formed in cooperation with the first heat insulation plate, so as to guide the high-temperature flue gas and impurities generated by the thermal runaway of the battery monomer to flow to the side of the battery device, thereby reducing the risk of damage to other battery monomers and other structures caused by the high-temperature flue gas and impurities generated by the thermal runaway.

[0008] In some embodiments, the first heat insulation plate is accommodated in the groove.

[0009] In the technical solution of the embodiment, the first heat insulation plate is located in the groove, so as to reduce the occupation of the first heat insulation plate to the internal space of the battery device, thereby reducing the negative influence of the arrangement of the first heat insulation plate on the energy density of the battery device.

[0010] In some embodiments, the box further comprises a second pressure relief structure arranged on one side of the frame structure along the second direction; the support extends along the second direction so that the flow guide channel extends to the side of the frame structure having the second pressure relief structure.

[0011] In the technical solution of the embodiment, the second pressure relief structure is arranged on the frame structure, and the flow guide channel extends to the side of the box having the second pressure relief structure, so that the high-temperature flue gas and impurities generated by thermal runaway of the battery monomer can flow faster to the vicinity of the second pressure relief structure and be discharged to the outside through the second pressure relief structure, thereby shortening the time of the high-temperature flue gas and impurities generated by thermal runaway staying in the box and reducing the risk of damage to other battery monomers and other structures caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0012] In some embodiments, the support is provided with a plugging member, which plugs one end of the flow guide channel away from the second pressure relief structure.

[0013] In the technical solution of the embodiment, the plugging member is arranged to close one end of the flow guide channel, so as to better limit the flow direction of the high-temperature flue gas and impurities generated by thermal runaway, and make the high-temperature flue gas and impurities generated by thermal runaway flow better to the vicinity of the second pressure relief structure.

[0014] In some embodiments, the box further comprises a beam body connected to the frame structure, the beam body divides the accommodation space into a first space and a second space arranged along the second direction, the battery monomer and the integrated busbar are accommodated in the first space, and the second space is used to accommodate electrical elements; the plugging member is located at one end of the support facing the second space.

[0015] In the technical solution of the embodiment, the plugging member is arranged on the side of the flow guide channel facing the second space, so as to hinder the high-temperature flue gas and impurities generated by thermal runaway from flowing to the second space, thereby reducing the risk of damage to the high-low voltage device caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0016] In some embodiments, the integrated busbar further comprises a second heat insulation plate accommodated in the flow guide channel, the second heat insulation plate is connected to the support and covers at least the inner wall of the groove facing the first pressure relief structure; the second heat insulation plate comprises a main body part and a weak part arranged on the main body part, the weak part corresponds to the through hole and corresponds to the first pressure relief structure, and the weak part is configured to form a crack allowing airflow to pass in response to the airflow pressure ejected by the corresponding first pressure relief structure.

[0017] In the technical solution of the embodiment, the second heat insulation plate is arranged in the flow guide channel, and the second heat insulation plate comprises a main body part and a weak part, so as to protect the support through the main body part, reduce the risk of the high-temperature flue gas and impurities generated by thermal runaway damaging the support, and reduce the risk of the high-temperature flue gas and impurities generated by thermal runaway burning through the support and contacting and damaging other battery monomers; the through hole is arranged on the support, and the through hole, the weak part and the first pressure relief structure correspond to each other, so that the high-temperature flue gas and impurities generated by thermal runaway of the battery monomer can enter the flow guide channel through the through hole and break through the weak part.

[0018] In some embodiments, the main body part and the weak part are connected through a connecting part; the connecting part surrounds the circumferential side of the weak part, and the thickness of the connecting part is less than the thickness of the main body part; and / or the connecting part is arranged at intervals around the circumferential side of the weak part; the connecting part is configured to be broken in response to the air flow pressure ejected by the corresponding first pressure relief structure.

[0019] The technical solution of the embodiment provides specific structures of some weak parts generating air flow cracks, the connecting part is arranged, the thickness of the connecting part is less than the thickness of the main body part, or the connecting part is arranged at intervals, so that the strength of the connecting part is less than the strength of the main body part; in the case of thermal runaway of the battery monomer, the arrangement makes the weak part more easily separated from the main body part and forms a crack for air flow to pass through, so as to facilitate the high-temperature flue gas and impurities generated by thermal runaway to enter the flow guide channel; at the same time, after the high-temperature flue gas and impurities generated by thermal runaway enter the flow guide channel, other weak parts can also play a role of adhering to the corresponding first pressure relief structure and protecting the corresponding first pressure relief structure.

[0020] In some embodiments, the integrated busbar further comprises a filling structure arranged between the support and the shell to fill the gap between the support and the shell, and the filling structure is arranged staggered with the first pressure relief structure.

[0021] In the technical solution of the embodiment, the filling structure is arranged between the support and the shell to fill the gap between the support and the shell; in the case of thermal runaway of the battery monomer, the filling structure can hinder the high-temperature flue gas and impurities generated by thermal runaway from entering the gap between the support and the shell, so as to better protect other battery monomers and other structures, and better guide the high-temperature flue gas and impurities generated by thermal runaway to one side of the box.

[0022] In some embodiments, the filling structure comprises an adhesive, and the support is connected to the shell through the adhesive.

[0023] The technical solution of the embodiment provides specific structures of some filling structures, so that the filling structure comprises an adhesive, so that the filling structure can not only fill the gap between the support and the shell, but also fix the support on the shell.

[0024] In some embodiments, the filling structure comprises polyurethane foam, and the bracket is connected to the shell through the polyurethane foam.

[0025] The technical solution of the embodiment provides specific structures of the filling structure, so that the filling structure comprises polyurethane foam, so that the filling structure can better fill the gap between the bracket and the shell, and the filling structure also has good heat insulation performance to better hinder the spread of heat; at the same time, the bracket can be stably connected to the shell.

[0026] In a second aspect, the embodiment of the present application further provides a battery device provided by some embodiments of the first aspect.

[0027] In a third aspect, the embodiment of the present application further provides an energy storage system, comprising the energy storage device provided by some embodiments of the second aspect; and a power conversion device, which is used to electrically connect the power generation device and the energy storage device.

[0028] In a fourth aspect, the embodiment of the present application further provides a charging network, comprising the energy storage device provided by some embodiments of the second aspect or the energy storage system in some embodiments of the third aspect; and a charging pile, the energy storage device being used to provide electric energy for the charging pile.

[0029] The above description is only a summary of the technical solution of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the present application. Moreover, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0031] Figure 1 Exploded structural schematic diagram of the battery device provided by some embodiments of the present application;

[0032] Figure 2 Exploded structural schematic diagram of the battery monomer provided by some embodiments of the present application;

[0033] Figure 3 Top view schematic diagram of the battery device provided by some embodiments of the present application after removing the top cover;

[0034] Figure 4 Three-dimensional schematic diagram of the battery monomer and the integrated busbar provided by some embodiments of the present application;

[0035] Figure 5 is Figure 4 a partial enlarged view of A in the figure;

[0036] Figure 6 a perspective view of a battery monomer and an integrated busbar provided for some embodiments of the present application;

[0037] Figure 7 is Figure 6 a partial enlarged view of B in the figure;

[0038] Figure 8 a perspective view of a bracket provided for some embodiments of the present application;

[0039] Figure 9 a perspective view of a second heat insulation plate provided for some embodiments of the present application;

[0040] Figure 10 is Figure 9 a sectional view of C-C line in the figure;

[0041] Figure 11 a partial enlarged view of a main body part and a weak part provided for some embodiments of the present application;

[0042] Figure 12 a perspective view of a filling structure provided for some embodiments of the present application;

[0043] Figure 13 a structural view of an energy storage system provided for some embodiments of the present application;

[0044] Figure 14 a structural view of a charging network provided for some embodiments of the present application.

[0045] The meaning of the mark in the figure is:

[0046] 100, battery device;

[0047] 10, box body; 101, containing space; 1011, first space; 1012, second space; 11, frame structure; 12, top cover; 13, bottom plate; 14, second pressure relief structure; 15, beam body;

[0048] 20, battery monomer; 21, shell; 211, shell body; 212, end cover; 22, electrode assembly; 23, electrode terminal; 24, first pressure relief structure;

[0049] 30, integrated busbar; 31, bracket; 311, groove; 312, through hole; 32, first heat insulation plate; 33, plugging piece; 34, second heat insulation plate; 341, main body part; 342, weak part; 343, connecting part; 35, filling structure;

[0050] 1, energy storage device; 2, power conversion device; 3, power generation device; 4, charging pile; 5, connector. DETAILED DESCRIPTION

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

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

[0053] 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 explicitly and specifically limited.

[0054] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0056] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0057] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the market demand is also increasing.

[0060] In the process of charging and discharging cycle, the battery monomer is easy to appear thermal runaway under the condition of short circuit, active material thermal decomposition and the like. The battery monomer thermal runaway is easy to spray out high temperature and high pressure flue gas and impurities; among them, the high temperature and high pressure flue gas and impurities are easy to cause the box body to break after contacting the box body, thereby easily affecting other structures outside the battery device, and the box body top cover is especially easy to break under the action of high temperature and high pressure flue gas.

[0061] Moreover, the free dispersion of high temperature and high pressure flue gas inside the box body of the battery device is also easy to cause damage and thermal runaway of other normal battery monomers; the impurities deposited on the electric connection structure such as the gasket are also easy to cause electric sparking, short circuit and further cause heat spread.

[0062] In order to reduce the damage of high temperature and high pressure flue gas and impurities of individual battery monomer thermal runaway to other structures, a channel structure for guiding high temperature and high pressure flue gas can be arranged in the box body; in order to protect the box body, especially to protect the box body top cover, a heat insulation plate can be arranged inside the box body top cover.

[0063] However, both the channel structure and the heat insulation plate will occupy the space inside the box, affect the arrangement of the battery monomers, and cause a negative impact on the energy density of the battery device.

[0064] Based on the above considerations, in order to alleviate the problem that the thermal runaway of the battery monomer causes damage to other structures in the battery device, the embodiments of the present application provide a battery device, which sets a groove on the bracket of the integrated busbar and covers the groove with a first heat insulation plate to form a flow guide channel, so as to constrain and guide the flow direction of the high-temperature high-pressure flue gas and impurities through the flow guide channel.

[0065] In such a battery device, the groove is arranged on the side of the integrated busbar away from the battery monomer, and the flow guide channel is formed in cooperation with the first heat insulation plate to guide the high-temperature flue gas and impurities generated by the thermal runaway of the battery monomer to flow to the side of the battery device, so as to constrain the high-temperature flue gas and impurities generated by the thermal runaway, hinder the free dispersion of the high-temperature flue gas and impurities generated by the thermal runaway, reduce the risk of damage to other battery monomers and other structures caused by the high-temperature flue gas and impurities generated by the thermal runaway, and reduce the damage that the high-temperature flue gas and impurities generated by the thermal runaway may cause to the top cover.

[0066] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0067] In order to illustrate the technical solutions of the present application, the specific embodiments and drawings will be described below.

[0068] Reference Figure 1 , Figure 1 The exploded structural schematic diagram of the battery device 100 provided by some embodiments of the present application is shown. The battery device 100 mentioned in the embodiments of the present application can include one or more battery monomer assemblies for providing voltage and capacity. The battery monomer assembly can include a plurality of battery monomers 20 connected in series, in parallel, or in a mixed connection through a busbar.

[0069] In some embodiments, the battery monomer assembly is usually formed by arranging a plurality of battery monomers 20.

[0070] As an example, the battery monomer assembly can be a battery module, which is formed by arranging and fixing a plurality of battery monomers 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery monomers 20 with a cable tie.

[0071] In some embodiments, the battery device 100 can be a battery pack, which includes the case 10 and one or more battery cell assemblies housed in the case 10.

[0072] As an example, the battery cell assembly can be a battery module, which can be housed in the case 10 by securing the battery module in the case 10.

[0073] As an example, the battery cell assembly can also be housed in the case 10 by securing a plurality of battery cells 20 directly to the case 10.

[0074] As an example, the case 10 can include a first case and a second case. The first case and the second case are fastened so that an enclosed space is formed inside the case 10 to receive the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first case can be the top cover 12 or the bottom plate 13.

[0075] As an example, the case 10 can include a top cover 12, a frame, and a bottom plate 13. The top cover 12 and the bottom plate 13 are connected to the frame, respectively, so that an enclosed space is formed inside the case 10 to receive the battery cell assembly.

[0076] In some embodiments, the case 10 can be part of a chassis structure of a vehicle. For example, part of the case 10 can be at least part of a floor of the vehicle, or part of the case 10 can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0077] Reference Figure 2 , Figure 2 A schematic diagram of a disassembled structure of a battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. As shown in the figure, the battery cell 20 includes a housing 21, an electrode assembly 22, and other functional components, and the housing 21 includes a case 211 and an end cover 212.

[0078] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Optionally, the end cover 212 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 212 is less likely to deform when subjected to extrusion collision, allowing the battery cell 20 to have higher structural strength and improved safety performance. The end cover 212 can be provided with functional components such as the electrode terminal 23. The electrode terminal 23 can be used to electrically connect with the electrode assembly 22 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 212 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212, which can be used to isolate the electrical connection part 343 in the shell 211 from the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0079] The shell 211 is a component for fitting the end cover 212 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, electrolyte and other components. The shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 211, the end cover 212 is covered on the shell 211. The shell 211 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0080] The electrode assembly 22 is a component in which an electrochemical reaction occurs in the battery cell 20. One or more electrode assemblies 22 can be contained within the case 211. The electrode assembly 22 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active material that constitute a main body portion 341 of the electrode assembly 22, and portions without active material that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body portion 341 or at separate ends of the main body portion 341. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminal 23 to form a current loop.

[0081] In a first aspect, with reference to Figures 3 to 7 The battery device 100 provided by the embodiments of the present application includes a box body 10, a battery cell 20, and an integrated busbar 30. The box body 10 includes a frame structure 11, a top cover 12, and a bottom plate 13 connected to the frame structure 11. The frame structure 11 has an accommodation space 101 extending through along a first direction. The top cover 12 and the bottom plate 13 are connected to two sides of the frame structure 11 along the first direction. The battery cell 20 is accommodated in the accommodation space 101. The battery cell 20 includes an outer shell 21 and a first pressure relief structure 24 provided on the outer shell 21. The integrated busbar 30 is accommodated in the accommodation space 101. The integrated busbar 30 includes a bracket 31 connected to the outer shell 21. The bracket 31, away from the battery cell 20, has a groove 311 extending along a second direction. The second direction is perpendicular to the first direction. The integrated busbar 30 further includes a first heat insulation plate 32 provided on the side of the bracket 31 away from the battery cell 20. The first heat insulation plate 32 covers the groove 311 and forms a flow guide channel. The bracket 31 is provided with a through hole 312 corresponding to the first pressure relief structure 24. The through hole 312 is in communication with the flow guide channel.

[0082] In the figure, the direction of the X-axis is the length direction of the battery device 100, the direction of the Y-axis is the width direction of the battery device 100, and the direction of the Z-axis is the height direction of the battery device 100.

[0083] The box body 10 refers to a structure in the battery device 100 for providing an accommodation space 101 for the battery cell 20 and other structures.

[0084] The frame structure 11 refers to a structure in the box body 10 for providing side protection for the battery cell 20. The frame structure 11 can include a plurality of edge beams connected in sequence. The frame structure 11 can be a quadrilateral square frame structure, or a pentagonal, hexagonal, or other shape frame structure. The beam body 15 in the frame structure 11 can be a box beam, an I-beam, or other shape beam structure.

[0085] The beam bodies 15 in the frame structure 11 can surround a containing space 101, which is a space structure extending through the frame structure 11 in a first direction. The first direction can be the height direction Z of the battery device 100, or the width direction Y of the battery device 100, or another direction. For example, the first direction is the height direction Z of the battery device 100.

[0086] The containing space 101 refers to a space structure in the box 10 for containing the battery monomer 20 or other structures. The containing space 101 can be a prismatic space structure, a cylindrical space structure, or a space structure of another shape. The shape of the containing space 101 can be set according to the shape of the frame structure 11.

[0087] The top cover 12 refers to a structure in the box 10 for closing the containing space 101. The top cover 12 can be a circular plate structure, a square plate structure, or a plate structure of another shape. The top cover 12 is connected to the frame structure 11. The top cover 12 can be connected to the frame structure 11 by adhesion, screwing, or other means. The top cover 12 can also be integrally formed with the frame structure 11.

[0088] The bottom plate 13 refers to a structure in the box 10 for bearing the battery monomer 20 or other structures. The bottom plate 13 can be a circular plate structure, a square plate structure, or a plate structure of another shape. The bottom plate 13 is connected to the frame structure 11. The bottom plate 13 can be connected to the frame structure 11 by adhesion, screwing, or other means. The bottom plate 13 can also be integrally formed with the frame structure 11.

[0089] The bottom plate 13 and the top cover 12 are respectively connected to opposite sides of the frame structure 11 and surround a closed containing space 101. The containing space 101 is a space structure in the box 10. The battery monomer 20 or other structures are contained in the containing space 101. The containing space 101 can be a prismatic space structure, a cylindrical space structure, or a space structure of another shape. The shape of the containing space 101 can be set according to the shape of the frame structure 11 to adapt to the box 10, or can be different from the shape of the frame structure 11.

[0090] The battery monomer 20 refers to the smallest unit of the battery device 100. The number of battery monomers 20 can be one, two, or more. When the number of battery monomers 20 is at least two, the battery monomers 20 can be connected in series, in parallel, or in a mixed connection. The battery monomers 20 can be arranged in one direction or arrayed in two different directions. The battery monomers 20 can be fixed and constrained by a binding belt, a plate body, or other structures. The battery monomers 20 can also be directly arranged in the containing space 101 of the box 10.

[0091] The shell 21 refers to a structure in the battery monomer 20 for forming an internal environment, which can be used to accommodate the electrode assembly 22, electrolyte and other components; the shell 21 can be prismatic, cylindrical or other shapes; the material of the shell 21 can include metal, plastic or other materials.

[0092] The first pressure relief structure 24 refers to a structure on the battery monomer 20 for relieving the pressure inside the shell 21, which can be opened to allow high-temperature smoke and impurities generated by thermal runaway to be discharged outside the shell 21 in the case of thermal runaway of the battery monomer 20; the first pressure relief structure 24 can include an explosion-proof valve, an explosion-proof membrane or other pressure relief structures.

[0093] The first pressure relief structure 24 is provided on the shell 21, one end of the first pressure relief structure 24 is in communication with the internal environment of the shell 21, and the other end of the first pressure relief structure 24 is directed outward of the shell 21, so that the smoke and impurities in the shell 21 can be discharged through the first pressure relief structure 24; the first pressure relief structure 24 can be provided on the end face of the shell 21, or on the peripheral side face of the shell 21. For example, the first pressure relief structure 24 is provided on the end cover 212.

[0094] The integrated busbar 30 refers to an electrical and signal management structure in the battery device 100, which can include a signal acquisition structure, such as a flexible printed circuit (FPC), a sampling wire harness and the like, and can also include an electrical connection structure, such as a copper busbar, an aluminum busbar and the like.

[0095] The bracket 31 refers to a structure in the integrated busbar 30 for providing support for the sampling wire harness, flexible printed circuit and the like, which can be a plate structure, a frame structure or other shaped structural members; the bracket 31 is connected to the shell 21, which can be connected to the shell 21 by adhesion, clamping or other means; the material of the bracket 31 can include metal, plastic or other materials.

[0096] The length direction of the bracket 31 can be the same as the arrangement direction of each battery monomer 20, so that the signal acquisition structure and the electrical connection structure on the bracket 31 are connected to each battery monomer 20; for example, the surface with larger area in the peripheral side face of each battery monomer 20 is arranged along the length direction X of the battery device 100, and the length direction of the bracket 31 is also parallel to the length direction X of the battery device 100.

[0097] The recess 311 refers to a groove structure arranged on the support 31, and the cross-sectional shape of the recess 311 can be square, semicircular or other shapes; the recess 311 is arranged on the side of the support 31 away from the battery monomer 20, that is, the bottom surface of the recess 311 is arranged adjacent to the battery monomer 20 and the opening of the recess 311 faces away from the battery monomer 20; the recess 311 can be directly formed during the machining of the support 31, or can be formed by cutting or other methods after the support 31 is machined; the recess 311 extends along the second direction, that is, the support 31 also extends along the second direction, at this time the second direction can be the length direction X of the battery device 100.

[0098] The second direction is perpendicular to the first direction, and the second direction can be the length direction X of the battery device 100, or the width direction Y of the battery device 100 or other directions; for example, the second direction is the length direction X of the battery device 100.

[0099] The first heat insulation plate 32 refers to a structure integrated into the busbar 30 for blocking high-temperature flue gas and impurities generated by thermal runaway; the shape of the first heat insulation plate 32 can be circular, square or other shapes; the first heat insulation plate 32 is connected to the support 31, and the first heat insulation plate 32 can be connected to the support 31 by adhesion, clamping or other methods; the material of the first heat insulation plate 32 can include rock wool, glass wool or other heat insulation materials.

[0100] For example, the material of the first heat insulation plate 32 can include mica.

[0101] The first heat insulation plate 32 covers the recess 311 and forms a flow guide channel, and the first heat insulation plate 32 can be located outside the recess 311 or inside the recess 311; the first heat insulation plate 32 can close the opening of the recess 311, and the flow guide channel extends along the extension direction of the recess 311; in the case that high-temperature flue gas and impurities enter the flow guide channel, the high-temperature flue gas and impurities can flow along the flow guide channel.

[0102] The through hole 312 refers to a hole structure arranged on the support 31, which can be a square hole, a circular hole or other hole structures, and can be a straight hole, a stepped hole or other hole structures; the through hole 312 corresponds to the first pressure relief structure 24, and in the case that one support 31 corresponds to multiple battery monomers 20, multiple through holes 312 can be arranged on the support 31, and each through hole 312 corresponds to each first pressure relief structure 24; one end of the through hole 312 faces the first pressure relief structure 24, and the other end of the through hole 312 communicates with the flow guide channel, so that the high-temperature flue gas and impurities generated by thermal runaway of the battery monomer 20 can enter the flow guide channel through the through hole 312.

[0103] In the case of thermal runaway of the battery monomer 20, the high-temperature flue gas and impurities generated by the thermal runaway will be sprayed to the first heat insulation plate 32. Under the obstruction of the first heat insulation plate 32, the high-temperature flue gas and impurities move to one side of the box body 10 along the second direction along the flow guide channel, so as to reduce the risk that the high-temperature flue gas and impurities generated by the thermal runaway directly impact the box body 10 to cause the box body 10 to be broken. At the same time, the flow guide channel can also constrain the high-temperature flue gas and impurities to reduce the risk that the high-temperature flue gas and impurities spread to other battery monomers 20 or other structures.

[0104] For example, the first pressure relief structure 24 is arranged at the upper end of the shell 21 in the height direction Z of the battery device 100 and faces the top cover 12. At this time, the bracket 31 is located above the battery monomer 20 in the height direction Z of the battery device 100. The recess 311 is arranged on the side of the bracket 31 facing the top cover 12. The first heat insulation plate 32 is located on the side of the recess 311 facing the top cover 12. The flow guide channel extends along the length direction X of the battery device 100. In the case of thermal runaway of the battery monomer 20, the high-temperature flue gas and impurities generated by the thermal runaway are sprayed to the first heat insulation plate 32. Under the obstruction of the first heat insulation plate 32, the high-temperature flue gas and impurities move to one side of the box body 10 along the second direction along the flow guide channel.

[0105] In the current battery device 100, in order to protect the box body 10 and reduce damage to the box body 10 by the high-temperature flue gas and impurities generated by the thermal runaway, a heat insulation plate is usually arranged on the side of the box body 10 facing the battery monomer 20. Taking the top cover 12 of the box body 10 as an example, a heat insulation plate is usually arranged on the inner side of the top cover 12 in the current battery device 100, and the heat insulation plate covers the entire top cover 12 to protect the top cover 12. However, the heat insulation plate usually has a certain thickness, which easily has a negative impact on the energy density of the battery device 100.

[0106] Therefore, in the present embodiment, the first heat insulation plate 32 is arranged on the bracket 31, and the flow guide channel is formed by cooperation of the first heat insulation plate 32 and the recess 311 to constrain and guide the flow of the high-temperature flue gas and impurities generated by the thermal runaway. At this time, the heat insulation plate for protecting the box body 10 can no longer be arranged in the box body 10, so as to save space, improve space utilization, and improve the energy density of the battery device 100.

[0107] In the embodiment, the groove 311 is arranged on the side of the integrated busbar 30 away from the battery monomer 20, and cooperates with the first heat insulation plate 32 to form a flow guide channel to guide the high-temperature flue gas and impurities generated by thermal runaway of the battery monomer 20 to flow to the side of the battery device 100, so as to reduce the risk of damage to other battery monomers 20 and other structures caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0108] Reference Figures 4 to 7 In some embodiments, the first heat insulation plate 32 is accommodated in the groove 311.

[0109] The first heat insulation plate 32 is accommodated in the groove 311, and the first heat insulation plate 32 is connected to the inner side wall of the groove 311; this arrangement can reduce the space occupation of the first heat insulation plate 32 in the internal space of the battery device 100; at the same time, due to the limitation of the size of the groove 311, the size of the first heat insulation plate 32 is also small.

[0110] In the current battery device 100, in order to protect the box body 10 and reduce the damage of the high-temperature flue gas and impurities generated by thermal runaway to the box body 10, a heat insulation plate is usually arranged on the side of the box body 10 facing the battery monomer 20; for example, the top cover 12 of the box body 10, in the current battery device 100, a heat insulation plate is usually arranged on the inner side of the top cover 12, and the heat insulation plate covers the entire top cover 12 to protect the top cover 12; however, the heat insulation plate usually has a certain thickness, which can easily negatively affect the energy density of the battery device 100.

[0111] In the embodiment, the first heat insulation plate 32 is arranged in the groove 311, so that the space occupation of the first heat insulation plate 32 can be further reduced, and the energy density of the battery device 100 can be improved.

[0112] For example, the first pressure relief structure 24 is arranged at the upper end of the shell 21 along the height direction Z of the battery device 100 and faces the top cover 12, at this time, the bracket 31 is located above the battery monomer 20 along the height direction Z of the battery device 100, the groove 311 is arranged on the side of the bracket 31 facing the top cover 12, and the first heat insulation plate 32 is arranged along the height direction Z of the battery device 100 with the bracket 31; at this time, the first heat insulation plate 32 located in the groove 311 can reduce the space occupation of the first heat insulation plate 32 in the height direction Z of the battery device 100, so as to reduce the negative impact of the arrangement of the first heat insulation plate 32 on the energy density of the battery device 100, and reduce the size of the battery device 100 in the height direction Z.

[0113] In the embodiment, the first heat insulation plate 32 is arranged in the groove 311 to reduce the space occupation of the first heat insulation plate 32 in the internal space of the battery device 100, so as to reduce the negative impact of the arrangement of the first heat insulation plate 32 on the energy density of the battery device 100.

[0114] Reference Figures 3 to 7In some embodiments, the box 10 further comprises a second pressure relief structure 14 arranged on the side frame structure 11 along the second direction; the support 31 extends along the second direction so that the flow guide channel extends to the side of the side frame structure 11 having the second pressure relief structure 14.

[0115] The second pressure relief structure 14 refers to a structure on the battery monomer 20 for relieving the pressure inside the box 10. In the case of thermal runaway of the battery monomer 20, the high-temperature flue gas generated by the thermal runaway will cause the pressure inside the box 10 to rise. At this time, the second pressure relief structure 14 can be opened to allow the high-temperature flue gas and impurities generated by the thermal runaway to be discharged outside the box 10. The second pressure relief structure 14 can include an explosion-proof valve, an explosion-proof membrane, or other pressure relief structures.

[0116] The second pressure relief structure 14 is arranged on the side frame structure 11, one end of the second pressure relief structure 14 is in communication with the containing space 101, and the other end of the second pressure relief structure 14 faces outside the box 10, so that the flue gas and impurities in the box 10 can be discharged through the second pressure relief structure 14.

[0117] Because the groove 311 extends along the second direction, that is, the flow guide channel extends along the second direction, the second pressure relief structure 14 is arranged on the side frame structure 11 along the second direction, so that the high-temperature flue gas and impurities generated by the thermal runaway can flow directly to the vicinity of the second pressure relief structure 14 along the flow guide channel, and be discharged directly outside the box 10 through the second pressure relief structure 14. This arrangement can reduce the dispersion range of the high-temperature flue gas and impurities generated by the thermal runaway in the box 10 after being discharged from the flow guide channel, and reduce the damage caused by the high-temperature flue gas and impurities generated by the thermal runaway to other battery monomers 20 and other structures in the box 10.

[0118] In the case where the flow guide channel has two outlets respectively located at both ends of the flow guide channel, the high-temperature flue gas and impurities generated by the thermal runaway can enter the box 10 from both ends of the flow guide channel. At this time, two second pressure relief structures 14 can be arranged on the box 10, and the two second pressure relief structures 14 are respectively opposite to the two outlets of the flow guide channel.

[0119] Because the high-temperature flue gas and impurities generated by the thermal runaway tend to gather in a local part of the box 10, which can cause the local pressure of the box 10 to rise higher than other parts, and thus the box 10 is subjected to higher stress. Accordingly, the second pressure relief structure 14 is arranged on the side frame structure 11, and the strength of the side frame structure 11 is relatively high. This arrangement can reduce the damage caused by the high-temperature flue gas and impurities generated by the thermal runaway to the box 10, and can reduce the risk of damage to the box 10.

[0120] In this embodiment, the second pressure relief structure 14 is arranged on the box body 10, the second pressure relief structure 14 is arranged on the frame structure 11, and the flow guide channel extends to one side of the box body 10 with the second pressure relief structure 14, so that the high-temperature flue gas and impurities generated by thermal runaway of the battery monomer 20 can flow faster to the vicinity of the second pressure relief structure 14 and be discharged to the outside through the second pressure relief structure 14, thereby shortening the time of the high-temperature flue gas and impurities generated by thermal runaway staying in the box body 10 and reducing the risk of damage to other battery monomers 20 and other structures caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0121] Reference Figure 3 、 Figure 6 、 Figure 7 In some embodiments, the support 31 is provided with a plugging piece 33, and the plugging piece 33 plugs one end of the flow guide channel away from the second pressure relief structure 14.

[0122] The plugging piece 33 refers to a structure in the integrated busbar 30 for closing the flow guide channel. The plugging piece 33 is used to close one end of the flow guide channel, so that the high-temperature flue gas and impurities generated by thermal runaway can only flow out of the flow guide channel from the end without the plugging piece 33. The plugging piece 33 can be a columnar structure, a plate-shaped structure or other shaped structural pieces. The shape of the plugging piece 33 can be circular, square or other shapes, and the shape of the plugging piece 33 can be arranged according to the cross-sectional shape of the flow guide channel. The material of the plugging piece 33 can include metal, plastic or other materials.

[0123] The plugging piece 33 is connected to the support 31. The plugging piece 33 can be connected to the support 31 by adhesion, screwing, clamping or other means. The plugging piece 33 can also be integrally formed with the support 31. The plugging piece 33 can be located inside the flow guide channel or outside the flow guide channel. For example, the plugging piece 33 is integrally formed with the support 31, and the plugging piece 33 is located outside the flow guide channel.

[0124] The plugging piece 33 is arranged at one end of the flow guide channel away from the second pressure relief structure 14, and the number of the second pressure relief structure 14 can be one at this time. This arrangement allows the high-temperature flue gas and impurities generated by thermal runaway to flow to the vicinity of the second pressure relief structure 14 through the flow guide channel, and be discharged to the outside of the box body 10 through the second pressure relief structure 14.

[0125] In this embodiment, the plugging piece 33 is arranged to close one end of the flow guide channel, so as to better limit the flow direction of the high-temperature flue gas and impurities generated by thermal runaway, and make the high-temperature flue gas and impurities generated by thermal runaway flow better to the vicinity of the second pressure relief structure 14.

[0126] Reference Figure 3 、 Figure 6 、 Figure 7In some embodiments, the box 10 further comprises a beam body 15 connected to the frame structure 11, the beam body 15 divides the containing space 101 into a first space 1011 and a second space 1012 arranged along a second direction, the battery monomer 20 and the integrated busbar 30 are contained in the first space 1011, and the second space 1012 is used to contain electrical components; the blocking piece 33 is located at one end of the support 31 towards the second space 1012.

[0127] The beam body 15 refers to a beam structure arranged in the box 10, and the beam body 15 is used to divide the containing space 101 into the first space 1011 and the second space 1012; the beam body 15 can be a box beam structure, an I-beam structure or other shaped beam structures; the beam body 15 is connected to the frame structure 11, and the beam body 15 can be connected to the frame structure 11 by adhesion, welding or other ways; the beam body 15 can be connected to the bottom plate 13 and / or the top cover 12, or the beam body 15 can not be connected to the bottom plate 13 and / or the top cover 12; the material of the beam body 15 can include metal, plastic or other materials.

[0128] The first space 1011 refers to a space in the containing space 101 used to contain the battery monomer 20, and the integrated busbar 30 is also contained in the first space 1011; the first space 1011 can be a prismatic space structure, or a cylindrical space structure or other shaped space structures.

[0129] The second space 1012 refers to a space in the containing space 101 used to contain electrical structures, which can include low-voltage electrical structures or high-voltage electrical structures; the second space 1012 can be a prismatic space structure, or a cylindrical space structure or other shaped space structures.

[0130] Since the battery monomer 20 is located in the first space 1011, in the case of thermal runaway of the battery monomer 20, the high-temperature flue gas and impurities generated by thermal runaway will enter the first space 1011 after being discharged from the flow guide channel; accordingly, the blocking piece 33 is located at one end of the support 31 towards the second space 1012, so as to hinder the high-temperature flue gas and impurities generated by thermal runaway from being discharged at the end of the flow guide channel close to the second space 1012, and enable the high-temperature flue gas and impurities generated by thermal runaway to be discharged at the end of the flow guide channel away from the second space 1012, thereby reducing the risk of damage to the electrical structures in the second space 1012 caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0131] In the present embodiment, the blocking piece 33 is arranged at the side of the flow guide channel towards the second space 1012, so as to hinder the high-temperature flue gas and impurities generated by thermal runaway from flowing to the second space 1012, thereby reducing the risk of damage to the high-voltage and low-voltage devices caused by the high-temperature flue gas and impurities generated by thermal runaway.

[0132] Reference Figure 4 ,Figure 5 、 Figures 9 to 11 In some embodiments, the integrated busbar 30 further comprises a second heat insulation plate 34 accommodated in the flow guide channel, the second heat insulation plate 34 is connected to the support 31 and covers at least the inner wall of the groove 311 facing the first pressure relief structure 24; the second heat insulation plate 34 comprises a main body part 341 and a weak part 342 provided on the main body part 341, the weak part 342 corresponds to the through hole 312 and corresponds to the first pressure relief structure 24, and the weak part 342 is configured to form a crack allowing airflow to pass through in response to the airflow pressure ejected by the corresponding first pressure relief structure 24.

[0133] The second heat insulation plate 34 refers to a structure in the integrated busbar 30 for blocking high-temperature flue gas and impurities generated by thermal runaway, the shape of the second heat insulation plate 34 can be circular, square or other shapes, and the shape of the second heat insulation plate 34 can also be set according to the shape of the groove 311; the second heat insulation plate 34 is connected to the support 31, and the second heat insulation plate 34 can be connected to the support 31 by bonding, clamping or other means; the material of the second heat insulation plate 34 can include rock wool, glass wool or other heat insulation materials.

[0134] For example, the material of the second heat insulation plate 34 can include mica.

[0135] The second heat insulation plate 34 is provided in the flow guide channel to protect the support 31, thereby reducing the risk of high-temperature flue gas and impurities generated by thermal runaway damaging the support 31, and also reducing the risk of high-temperature flue gas and impurities generated by thermal runaway burning through the support 31 and escaping outside the flow guide channel.

[0136] The main body part 341 refers to a part of the second heat insulation plate 34 mainly used for protecting the support 31, the shape of the main body part 341 can be square, circular or other shapes, and the shape of the main body part 341 can also be set according to the shape of the corresponding wall surface; the main body part 341 is connected to the support 31, and the main body part 341 can also be connected to the support 31 by bonding, clamping or other means.

[0137] The main body part 341 covers at least the inner wall of the groove 311 facing the first pressure relief structure 24, that is, the main body part 341 can only cover the inner wall of the groove 311 facing the first pressure relief structure 24, or can also cover other inner walls of the groove 311; since the inner wall of the groove 311 facing the first pressure relief structure 24 is opposite to the battery monomer 20, if the high-temperature flue gas and impurities generated by thermal runaway burn through this wall, it will directly contact the battery monomer 20, so the main body part 341 covers at least the inner wall of the groove 311 facing the first pressure relief structure 24, to reduce the risk of high-temperature flue gas and impurities generated by thermal runaway burning through the support 31 and damaging other battery monomers 20.

[0138] The weak part 342 refers to a part of the second heat insulation plate 34 for protecting the first pressure relief structure 24, and the shape of the weak part 342 can be circular, square or other shapes; the weak part 342 is arranged on the main body part 341, and the weak part 342 can be connected to the main body part 341 through a connecting structure or can be integrally formed with the main body part 341; the weak part 342 corresponds to the through hole 312, and the through hole 312 corresponds to the first pressure relief structure 24, so the weak part 342 also corresponds to the first pressure relief structure 24.

[0139] For example, a hole structure is arranged through the main body part 341, the weak part 342 is located in the hole structure and connected to the main body part 341, the hole structure corresponds to the through hole 312, so that the weak part 342 can correspond to the first pressure relief structure 24; at this time, the main body part 341 can also cover the side wall of the groove 311 facing the first pressure relief structure 24.

[0140] The weak part 342 is configured to form a crack allowing the airflow to pass in response to the airflow pressure sprayed by the first pressure relief structure 24, that is, in the case that the weak part 342 corresponds to the thermal runaway of the battery monomer 20, the high-temperature flue gas generated by the thermal runaway can form a crack on the weak part 342, and the high-temperature flue gas and impurities generated by the thermal runaway can enter the flow guide channel through the crack; the crack can be formed in the middle of the weak part 342 or at the position where the weak part 342 is connected to the main body part 341.

[0141] In the case of thermal runaway of a certain battery monomer 20, the high-temperature flue gas generated by the thermal runaway can break through the weak part 342 and enter the flow guide channel, and then flow along the flow guide channel to one side of the box body 10.

[0142] The embodiment provides some specific structures of the second heat insulation plate 34, the through hole 312 is arranged on the support 31, the weak part 342 is arranged on the second heat insulation plate 34, and the through hole 312 and the weak part 342 correspond to the first pressure relief structure 24, so that the high-temperature flue gas and impurities generated by the thermal runaway of the battery monomer 20 can enter the flow guide channel through the through hole 312 and break through the weak part 342; at the same time, after the high-temperature flue gas and impurities generated by the thermal runaway enter the flow guide channel, other weak parts 342 can also play a role in adhering to the corresponding first pressure relief structure 24 and protecting the corresponding first pressure relief structure 24.

[0143] Reference Figures 9 to 11 In some embodiments, the main body part 341 and the weak part 342 are connected through a connecting part 343; the connecting part 343 surrounds the circumferential side of the weak part 342, and the thickness of the connecting part 343 is less than the thickness of the main body part 341; and / or the connecting part 343 is arranged at intervals around the circumferential side of the weak part 342; the connecting part 343 is configured to break in response to the airflow pressure sprayed by the corresponding first pressure relief structure 24.

[0144] The connecting portion 343 refers to the connecting structure of the weak portion 342 and the main body portion 341. The connecting portion 343 can be independent of the structural members of the weak portion 342 and the main body portion 341, and the connecting portion 343, the weak portion 342, and the main body portion 341 can also be integrally formed. The connecting portion 343 can be in a strip-shaped structure, or in an arc-shaped structure, a ring-shaped structure, or other shapes. One weak portion 342 can correspond to one connecting portion 343, or can correspond to two or more connecting portions 343. The material of the connecting portion 343 can be the same as or different from that of the main body portion 341.

[0145] Referring to Figure 10 , the connecting portion 343 can surround the circumferential side of the weak portion 342 and connect the weak portion 342 to the main body portion 341. At this time, the thickness of the connecting portion 343 is less than that of the main body portion 341, so that the connecting portion 343 can be broken first in the case of being impacted by the high-temperature smoke gas generated by thermal runaway, thereby enabling the high-temperature smoke gas and impurities generated by thermal runaway to enter the flow guide channel.

[0146] In the case of thermal runaway of the battery monomer 20, the pressure carried by the high-temperature smoke gas generated by thermal runaway will impact the weak portion 342 and cause the connecting portion 343 to break. At this time, the weak portion 342 will be separated from the main body portion 341 and form a gap, and the high-temperature smoke gas and impurities generated by thermal runaway can enter the flow guide channel through the gap.

[0147] Referring to Figure 11 , the connecting portion 343 can also be arranged at intervals around the weak portion 342, that is, the number of connecting portions 343 can be two or more, and each connecting portion 343 is arranged at intervals. In this way, the connecting portion 343 can be broken first in the case of being impacted by the high-temperature smoke gas generated by thermal runaway, thereby enabling the high-temperature smoke gas and impurities generated by thermal runaway to enter the flow guide channel.

[0148] In the case of thermal runaway of the battery monomer 20, the pressure carried by the high-temperature smoke gas generated by thermal runaway will impact the weak portion 342 and cause at least one connecting portion 343 to break. At this time, the weak portion 342 will be separated from the main body portion 341 and form a gap, and the high-temperature smoke gas and impurities generated by thermal runaway can enter the flow guide channel through the gap.

[0149] For the battery monomer 20 that does not undergo thermal runaway, after the high-temperature smoke gas and impurities generated by thermal runaway enter the flow guide channel, other connecting portions 343 can also break under the action of the high-temperature smoke gas and impurities. At this time, the weak portion 342 adheres to the corresponding first pressure relief structure 24 under the action of gravity and the pressure of the high-temperature smoke gas, so as to protect the corresponding first pressure relief structure 24, thereby reducing the risk that the high-temperature smoke gas and impurities generated by thermal runaway damage other normal first pressure relief structures 24 and cause thermal runaway to spread.

[0150] The embodiment provides specific structures of the weak portions 342 generating the airflow cracks, the connecting portions 343 are arranged, the thickness of the connecting portions 343 is less than the thickness of the main body portion 341, or the connecting portions 343 are arranged at intervals, so that the strength of the connecting portions 343 is less than the strength of the main body portion 341; in the case of thermal runaway of the battery monomer 20, the weak portions 342 can be more easily separated from the main body portion 341 and form cracks for airflow to flow, so as to facilitate the high-temperature flue gas and impurities generated by thermal runaway to enter the flow guide channel; meanwhile, after the high-temperature flue gas and impurities generated by thermal runaway enter the flow guide channel, the other weak portions 342 can also play a role in adhering to the corresponding first pressure relief structure 24 and protecting the corresponding first pressure relief structure 24.

[0151] Reference Figures 4 to 7 、 Figure 12 In some embodiments, the integrated busbar 30 further comprises a filling structure 35 arranged between the bracket 31 and the shell 21 to fill the gap between the bracket 31 and the shell 21, and the filling structure 35 is arranged staggered with the first pressure relief structure 24.

[0152] The filling structure 35 refers to a structure for filling the gap between the bracket 31 and the shell 21, and the filling structure 35 can be a plate-shaped structure or a block-shaped structure, and the filling structure 35 can be a hard structure or a structure with a certain deformation capacity to better conform to the bracket 31 and the shell 21.

[0153] The filling structure 35 can be connected to the shell 21 and / or the bracket 31, can be pressed on the shell 21 through the bracket 31, or can be fixed through other ways.

[0154] The filling structure 35 is used to fill the gap between the bracket 31 and the shell 21 to prevent the high-temperature flue gas and impurities generated by thermal runaway from entering the gap between the shell 21 and the bracket 31 structure and then spreading to other battery monomers 20 or other structures; accordingly, the material of the filling structure 35 can include rock wool, glass wool or other materials with good high-temperature resistance.

[0155] The filling structure 35 is arranged staggered with the first pressure relief structure 24, that is, the filling structure 35 is arranged at a position avoiding the first pressure relief structure 24, so that the high-temperature flue gas and impurities generated by thermal runaway can enter the flow guide channel through the first pressure relief structure 24 and the through hole 312. For example, the filling structure 35 is provided with an avoiding hole at a position corresponding to the first pressure relief structure 24 and the through hole 312, so as to flow the high-temperature flue gas and impurities generated by heat exchange.

[0156] In the embodiment, the filling structure 35 is arranged between the bracket 31 and the shell 21 to fill the gap between the bracket 31 and the shell 21 through the filling structure 35; in the case of thermal runaway of the battery monomer 20, the filling structure 35 can hinder the high-temperature flue gas and impurities generated by thermal runaway from entering the gap between the bracket 31 and the shell 21, so as to better protect other battery monomers 20 and other structures, and better guide the high-temperature flue gas and impurities generated by thermal runaway to one side of the box 10.

[0157] In some embodiments, the filling structure 35 includes an adhesive, and the bracket 31 is connected to the shell 21 through the adhesive.

[0158] The filling structure 35 includes an adhesive, which can be glue or other adhesive structures; the filling structure 35 includes the adhesive so that the filling structure 35 can not only fill the gap between the bracket 31 and the shell 21, but also adhere the bracket 31 to the shell 21.

[0159] The embodiment provides specific structures of the filling structure 35, and the filling structure 35 includes the adhesive so that the filling structure 35 can not only fill the gap between the bracket 31 and the shell 21, but also fix the bracket 31 to the shell 21.

[0160] In some embodiments, the filling structure 35 includes polyurethane foam, and the bracket 31 is connected to the shell 21 through the polyurethane foam.

[0161] The polyurethane foam is a filling and sealing material, which can fill the gap and adhere and fix through foaming, and has excellent heat insulation performance; the polyurethane foam can fill the gap between the shell 21 and the bracket 31, and can adapt to the uneven surface of the bracket 31 and the shell 21 in the foaming process, so as to better fill the gap between the bracket 31 and the shell 21; meanwhile, the polyurethane foam can hinder the spread of high-temperature flue gas generated by thermal runaway, and can stably adhere the bracket 31 to the shell 21.

[0162] The embodiment provides specific structures of the filling structure 35, and the filling structure 35 includes the polyurethane foam, so that the filling structure 35 can better fill the gap between the bracket 31 and the shell 21, and the filling structure 35 has good heat insulation performance to better hinder the spread of heat; meanwhile, the bracket 31 can be stably connected to the shell 21.

[0163] In some embodiments, the battery device 100 includes the box 10, the battery monomer 20 and the integrated busbar 30.

[0164] The box body 10 comprises a top cover 12, a frame structure 11 and a bottom plate 13, the frame structure 11 has a containing space 101 arranged through along the height direction X of the battery device 100, and the top cover 12 and the bottom plate 13 are connected to two sides of the frame structure 11 along the height direction X of the battery device 100 respectively.

[0165] The box body 10 further comprises a beam body 15, the length direction of the beam body 15 is parallel to the width direction Y of the battery device 100, two ends of the beam body 15 are connected to the frame structure 11, and the containing space 101 is divided into a first space 1011 and a second space 1012, and the first space 1011 and the second space 1012 are arranged along the length direction X of the battery device 100.

[0166] The box body 10 further comprises a second pressure relief structure 14, the second pressure relief structure 14 is arranged at an end of the frame structure 11 away from the second space 1012 along the length direction X of the battery device 100.

[0167] The battery monomers 20 are arranged in the first space 1011 along the length direction X and the width direction Y of the battery device 100, and the side with a larger area of the battery monomer 20 is arranged along the length direction X of the battery device 100; the battery device 100 comprises a shell 21 and a first pressure relief structure 24 connected to the shell 21, the first pressure relief structure 24 is arranged at one side of the shell 21 along the height direction Z of the battery device 100, and the first pressure relief structure 24 faces the top cover 12.

[0168] The integrated busbar 30 comprises a support 31, the length direction of the support 31 is parallel to the length direction X of the battery device 100, and one support 31 corresponds to each battery monomer 20 along the length direction X of the battery device 100, the support 31 is connected to one side of the shell 21 facing the top cover 12 through a filling structure 35, and the filling structure 35 fills the gap between the support 31 and the shell 21; one side of the support 31 facing the top cover 12 is provided with a groove 311, the groove 311 extends along the length direction X of the battery device 100, and a plurality of through holes 312 are arranged on the support 31, and each through hole 312 corresponds to each first pressure relief structure 24 respectively.

[0169] The integrated busbar 30 further comprises a first heat insulation plate 32, and the first heat insulation plate 32 is arranged on one side of the support 31 facing the top cover 12 and covers the groove 311, so as to form a flow guide channel, and the flow guide channel extends along the length direction X of the battery device 100; the integrated busbar 30 further comprises a plugging piece 33, and the plugging piece 33 is connected to the support 31 and plugs one side of the flow guide channel facing the second space 1012.

[0170] The integrated busbar 30 further comprises a second heat insulation plate 34, and the second heat insulation plate 34 covers the inner wall of the heat conduction plate close to the shell 21.

[0171] In a second aspect, some embodiments of the present application further provide an energy storage device 1, comprising the battery device 100 provided by some embodiments of the first aspect; wherein the battery device 100 is configured to store or provide electrical energy.

[0172] The energy storage device 1 comprises one or more battery clusters to improve the voltage and capacity of the energy storage device 1. The battery cluster can comprise a plurality of battery devices 100 connected in series by busbar components to improve the voltage of the energy storage device 1. When the energy storage device 1 comprises a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device 1.

[0173] The energy storage device 1 can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1 can store electrical energy as needed and output electrical energy at appropriate times. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide electrical energy to relevant users or electrical equipment during peak hours. The energy storage system provided by the embodiments of the present application can be any power system that requires the use of the energy storage device 1.

[0174] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0175] In some embodiments, the energy storage device 1 can comprise a cabinet body and one or more battery clusters, wherein the battery clusters are accommodated in the cabinet body.

[0176] In some embodiments, the energy storage device 1 can comprise a thermal management module, a master control module, a general control module, a power distribution module, and a fire-fighting module, etc.

[0177] As an example, the thermal management module can comprise a liquid cooling unit that provides cooling liquid to each battery device 100 through a pipeline to regulate the temperature of the battery monomer 20.

[0178] As an example, the master control module can serve as a battery management unit of the battery cluster to monitor and manage the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The master control module comprises a slave battery management unit (SBMU), a fuse module, etc.

[0179] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0180] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0181] As an example, the power distribution module can be used to distribute power to the modules in the energy storage device 1 that require electricity.

[0182] Thirdly, refer to Figure 13 Some embodiments of this application also provide an energy storage system, including an energy storage device 1 and a power conversion device 2 provided in some embodiments of the second aspect, wherein the power conversion device 2 is used to electrically connect a power generation device 3 and an energy storage device 1.

[0183] An energy storage system may include one or more energy storage devices 1 and a power conversion system 2 (PCS), wherein the power conversion system 2 is connected between a power generation device 3 and an energy storage device 1. The power generation device 3 generates electrical energy, which can be stored in the energy storage device 1 via the power conversion system 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device 3, a thermal power generation device 3, a wind power generation device 3, etc. The specific type of the power generation device 3 is not limited in this application.

[0184] Fourthly, refer to Figure 14 Some embodiments of this application also provide a charging network, including a charging pile 4 and an energy storage device 1 provided in some embodiments of the second aspect, or an energy storage system provided in some embodiments of the third aspect. The energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0185] The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is also electrically connected to the battery device 100 in the energy storage device 1 via a cable, and the battery device 100 can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical equipment (such as vehicles) to replenish the power of the equipment.

[0186] The energy storage device 1 can be located inside the charging pile 4 (for example, a charging and storage integrated machine) or outside the charging pile 4.

[0187] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes a frame structure and a top cover and a bottom plate connected to the frame structure. The frame structure has an accommodating space that extends through a first direction. The top cover and the bottom plate are connected to both sides of the frame structure along the first direction. A battery cell is housed within the housing space, the battery cell including a housing and a first pressure relief structure disposed on the housing; An integrated busbar is housed within the accommodating space. The integrated busbar includes a bracket connected to the housing. The bracket has a groove extending in a second direction on the side opposite to the battery cell. The second direction is perpendicular to the first direction. The integrated busbar also includes a first heat insulation plate disposed on the side of the bracket away from the battery cell, the first heat insulation plate covering the groove and forming a flow channel; The bracket is provided with a through hole corresponding to the first pressure relief structure, and the through hole is connected to the flow guiding channel; The enclosure also includes a second pressure relief structure, which is located on one side of the frame structure along the second direction; The bracket extends along the second direction so that the flow channel extends to the side of the frame structure having the second pressure relief structure.

2. The battery device according to claim 1, characterized in that, The first heat insulation plate is accommodated within the groove.

3. The battery device according to claim 1, characterized in that, The bracket is equipped with a sealing element, which blocks the end of the flow channel away from the second pressure relief structure.

4. The battery device according to claim 3, characterized in that, The enclosure also includes a beam connected to the frame structure, which divides the accommodating space into a first space and a second space arranged along the second direction. The battery cell and the integrated busbar are accommodated in the first space, and the second space is used to accommodate electrical components. The sealing element is located at the end of the bracket facing the second space.

5. The battery device according to any one of claims 1-4, characterized in that, The integrated busbar also includes a second heat insulation plate housed within the flow channel, the second heat insulation plate being connected to the bracket and at least covering the inner wall of the groove facing the first pressure relief structure; The second heat insulation plate includes a main body and a weak portion provided on the main body. The main body is connected to the bracket. The weak portion corresponds to the through hole and to the first pressure relief structure. The weak portion is configured to form a crack that allows airflow to pass through in response to the airflow pressure ejected by the corresponding first pressure relief structure.

6. The battery device according to claim 5, characterized in that, The main body and the weak part are connected by a connecting part; The connecting portion surrounds the periphery of the weak portion, and the thickness of the connecting portion is less than the thickness of the main body portion; and / or the connecting portion is spaced apart around the periphery of the weak portion; The connecting portion is configured to break in response to the airflow pressure ejected by the corresponding first pressure relief structure.

7. The battery device according to any one of claims 1-4, characterized in that, The integrated busbar also includes a filling structure, which is disposed between the bracket and the outer shell to fill the gap between the bracket and the outer shell, and the filling structure is staggered from the first pressure relief structure.

8. The battery device according to claim 7, characterized in that, The filling structure includes an adhesive element, through which the bracket is connected to the outer shell.

9. The battery device according to claim 7, characterized in that, The filling structure includes polyurethane foam, and the bracket is connected to the outer shell through the polyurethane foam.

10. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1-9.

11. An energy storage system, characterized in that, Including the energy storage device as described in claim 10; and A power conversion device for electrically connecting a power generation device and an energy storage device.

12. A charging network, characterized in that, Includes the energy storage device as described in claim 10; or the energy storage system as described in claim 11; and A charging pile, wherein the energy storage device is used to provide electrical energy to the charging pile.

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