Battery and electric device

Abstract

The invention relates to a battery and an electric device. The battery comprises a box body, a battery unit and a smoke guide frame, the box body is provided with a containing cavity and a smoke exhaust channel, and the battery unit and the smoke guide frame are both located in the containing cavity; each battery unit is provided with a first side and a second side which are oppositely arranged along a first direction, each battery unit comprises a first battery cell module and a second battery cell module which are alternately arranged and are connected in series, each of the first battery cell module and the second battery cell module comprises a battery cell, each battery cell is provided with a battery cell explosion-proof valve, all the battery cell explosion-proof valves of the first battery cell module face the first side, and all the battery cell explosion-proof valves of the second battery cell module face the second side; all battery cell explosion-proof valves of the second battery cell module face the second side; the smoke guide frame is provided with a plurality of smoke guide channels, and on the same side of the battery unit, all the smoke guide channels on the smoke guide frame are in one-to-one correspondence with all the battery cell explosion-proof valves; the smoke guide channels are in one-to-one correspondence with the smoke inlets of the smoke exhaust channels, and the smoke guide channels are communicated between the corresponding battery cell explosion-proof valves and the smoke inlets. The battery provided by the invention can reduce the electrical risk.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of the Chinese utility model patent application filed with the China Patent Office on November 20, 2023, with application number 2023231326505. The entire contents of the patent application are incorporated into this application by reference. Technical Field

[0003] The present application relates to the field of battery technology, and specifically to a battery and an electrical device. Background Art

[0004] With the development of battery technology, batteries are widely used in various fields due to their advantages of better environmental protection, long battery life, high cost performance, etc. During the operation of the battery, when the battery thermally runs away, the high-temperature conductive material after the explosion-proof valve of the battery cell is sprayed into the battery, which can easily cause a short circuit of the pole, ablation of the sampling harness in the battery, arcing, etc., resulting in electrical risks. Summary of the invention

[0005] Based on this, it is necessary to provide a battery and an electrical device that can reduce electrical risks in order to address the above problems.

[0006] A battery, comprising a box, a battery unit and a smoke guide frame, wherein the box has a receiving cavity and a smoke exhaust passage, and the battery unit and the smoke guide frame are both located in the receiving cavity;

[0007] The battery unit has a first side and a second side arranged opposite to each other along a first direction, the battery unit includes a first battery cell module and a second battery cell module which are alternately arranged and connected in series, the first battery cell module and the second battery cell module each include at least one battery cell or at least two battery cells connected in parallel, the battery cell has a battery cell explosion-proof valve, all the battery cell explosion-proof valves of the first battery cell module face the first side, and all the battery cell explosion-proof valves of the second battery cell module face the second side;

[0008] The smoke guide frame is disposed on the first side and the second side of the battery unit, and the smoke guide frame has a plurality of smoke guide channels. On the same side of the battery unit, all the smoke guide channels on the smoke guide frame correspond to all the battery cell explosion-proof valves one by one;

[0009] The first side and the second side of the battery unit are both provided with a plurality of smoke inlets of the smoke exhaust channel. On the same side of the battery unit, the smoke guiding channel corresponds one-to-one to the smoke inlets of the smoke exhaust channel, and the smoke guiding channel is connected between the corresponding battery cell explosion-proof valve and the smoke inlet.

[0010] In some embodiments, the box body has at least two first beams arranged at intervals along the first direction, and at least two second beams arranged at intervals along a second direction intersecting the first direction, and each adjacent two first beams and each adjacent two second beams enclose a sub-cavity, and the battery unit and the smoke guide frame are arranged in the sub-cavity, and all the sub-cavities are constructed together to form the accommodating cavity;

[0011] The first beam body is provided with a first smoke exhaust cavity, and the surface of the first beam body facing the smoke guide frame is provided with the smoke inlet; the first and / or last second beam body arranged along the second direction is provided with a second smoke exhaust cavity and a smoke outlet, all the smoke inlets on the first beam body are connected with the first smoke exhaust cavity and together form an air intake section of the smoke exhaust channel, and the first smoke exhaust cavity and the smoke outlet on the second beam body are connected to form an air outlet section of the smoke exhaust channel.

[0012] In some embodiments, a battery explosion-proof valve is provided at the smoke outlet.

[0013] In some embodiments, the smoke guide frame includes a smoke guide portion and a connecting portion alternately arranged along a second direction intersecting the first direction, and the smoke guide portion is provided with the smoke guide channel;

[0014] On the first side of the battery unit, all the smoke guide channels on the smoke guide frame are aligned one by one with and connected to the battery cell explosion-proof valves of all the first battery cell modules, and all the connecting parts of the smoke guide frame are aligned one by one with at least part of the second battery cell modules;

[0015] On the second side of the battery unit, all the smoke guide channels on the smoke guide frame are aligned one by one with and connected to all the battery cell explosion-proof valves of all the second battery cell modules, and all the connecting parts of the smoke guide frame are aligned one by one with at least part of the first battery cell modules.

[0016] In some embodiments, the surface of the smoke guide portion facing the battery unit is provided with a plurality of smoke guide inlets arranged along the second direction, and the smoke guide portion has a smoke guide cavity therein and an outlet therein. In the same smoke guide portion, the smoke guide inlet, the smoke guide cavity and the smoke guide outlet are connected in sequence to form the smoke guide channel.

[0017] In some embodiments, the surface on the smoke guide portion where the smoke guide outlet is opened is a first surface, and the surface on the smoke guide portion where the smoke guide inlet is opened is a second surface. In the direction from the first surface to the second surface, the width of the smoke guide portion in the second direction and / or a third direction gradually decreases, and the third direction intersects with both the first direction and the second direction.

[0018] In some embodiments, the inner wall of the smoke guiding cavity is covered with a fireproof layer.

[0019] In some embodiments, the battery also includes a mounting seat, and the mounting seat is provided on the first side and the second side of the battery unit. The mounting seat is installed on the box body on the same side of the battery unit, and the mounting seat corresponds to the connecting part one by one. The mounting seat is arranged on one side of the corresponding connecting part along a third direction intersecting with both the first direction and the second direction, and is detachably connected to the corresponding connecting part.

[0020] In some embodiments, a side of the smoke guide frame facing away from the mounting seat is bonded to the box body by heat conductive adhesive.

[0021] In some embodiments, the battery further includes an insulating heat-insulating sheet, and both the first side and the second side of the battery unit are provided with insulating heat-insulating sheets, and on the same side of the battery unit, the insulating heat-insulating sheet is provided between the smoke guide frame and all the battery cell explosion-proof valves.

[0022] In some embodiments, the battery cell explosion-proof valve has a first boundary and a second boundary arranged at intervals along a third direction intersecting the first direction, and the second boundary is located on the bottom side of the first boundary; on the same side of the battery unit, the two ends of the insulating and heat-insulating sheet arranged along the third direction respectively extend out of the first boundary and the second boundary of the battery cell explosion-proof valve, and the length of the insulating and heat-insulating sheet extending out of the highest point of the first boundary and the lowest point of the second boundary is L, 1.5mm<L<2.5mm.

[0023] In some embodiments, the insulating and heat-insulating sheet is constructed with multiple weak portions, and on the same side of the battery unit, at least some of the weak portions on the insulating and heat-insulating sheet are aligned one by one with all the battery cell explosion-proof valves and all the smoke guide channels on the smoke guide frame.

[0024] In some embodiments, in the first direction, the orthographic projections of the weak portion and the smoke guide inlet of the smoke guide channel both fall into the corresponding battery cell explosion-proof valve;

[0025] The cross-sectional area of ​​the weak portion perpendicular to the first direction and the cross-sectional area of ​​the smoke guide inlet of the smoke guide channel are both smaller than the corresponding cross-sectional area of ​​the battery core explosion-proof valve perpendicular to the first direction.

[0026] In some embodiments, the cross-sectional area of ​​the weak portion perpendicular to the first direction and the cross-sectional area of ​​the smoke guide inlet of the smoke guide channel are both approximately 80% of the cross-sectional area of ​​the corresponding battery core explosion-proof valve perpendicular to the first direction.

[0027] In some embodiments, the battery also includes a first seal, and the first side and the second side of the battery cell are both provided with a first seal, and the first seal is provided with a plurality of first avoidance holes; on the same side of the battery cell, the first seal is sealed and connected between the insulating heat insulation sheet and the smoke guide frame, and all of the first avoidance holes on the first seal are aligned one by one with all of the weak portions on the insulating heat insulation sheet.

[0028] An electrical device comprises a battery as described in any one of the above embodiments, wherein the battery is used to provide electrical energy for the electrical device.

[0029] In the above-mentioned battery and electrical device, the first side and the second side of the battery unit arranged along the first direction both have a battery cell explosion-proof valve, a smoke guide frame and a smoke inlet of the smoke exhaust channel. On the same side of the battery unit, the smoke guide channel corresponds to the smoke inlet of the smoke exhaust channel one by one, and the smoke guide channel is connected between the corresponding battery cell explosion-proof valve and the corresponding smoke inlet. Therefore, the high-temperature conductive material sprayed from the battery cell explosion-proof valve follows the high-temperature flue gas through the smoke guide channel and the smoke inlet corresponding to the battery cell explosion-proof valve into the smoke exhaust channel, and flows through the smoke exhaust channel and is discharged to the outside of the battery. In this way, the high-temperature flue gas and the high-temperature conductive material can be directed to be sprayed in a directional manner, and the thermal and electrical separation of the battery is realized, thereby reducing the electrical risks such as the short circuit of the pole caused by the spraying of the high-temperature conductive material into the battery, the ablation of the sampling harness in the battery, and the arcing, etc., and the purpose of isolating the high-temperature conductive material from the battery cell pole is achieved, and the safety of the battery is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of a battery in one embodiment of the present application;

[0031] Figure 2 for Figure 1 An exploded view of the battery shown;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of a local structure A in the battery shown;

[0033] Figure 4 for Figure 2 An enlarged schematic diagram of a local structure B in the battery shown;

[0034] Figure 5 for Figure 2 An enlarged schematic diagram of a local structure C in the battery shown;

[0035] Figure 6 for Figure 2 An enlarged schematic diagram of a local structure D in the battery shown;

[0036] Figure 7 for Figure 1A schematic diagram of the structure of the frame in the battery shown;

[0037] Figure 8 for Figure 7 An enlarged schematic diagram of a local structure E in the battery shown;

[0038] Fig. 9 for Figure 1 A schematic diagram of the structure of a battery unit, an insulating heat shield and a first sealing member in the battery shown;

[0039] Fig.10 for Fig. 9 An enlarged schematic diagram of a local structure S in the battery shown;

[0040] Fig.11 for Fig.10 An exploded view of the battery shown;

[0041] Fig.12 for Fig.11 A schematic diagram of the structure of a battery cell shown;

[0042] Fig.13 for Fig.12 A right side view of the battery cell shown;

[0043] Fig.14 for Fig.12 A left side view of the battery cell shown;

[0044] Fig.15 for Figure 1 A partial cross-sectional view of the battery shown after inversion;

[0045] Fig.16 for Fig.15 An enlarged schematic diagram of a local structure F of the battery shown;

[0046] Fig.17 for Figure 1 A top view of the battery shown;

[0047] Fig.18 for Fig.17 The cross-sectional view of the battery shown along the FF direction;

[0048] Fig.19 for Fig.18 An enlarged schematic diagram of a local structure H in the battery shown;

[0049] Fig. 20 for Fig.17 The cross-sectional view of the battery shown along the GG direction;

[0050] Fig.21 for Fig. 20 An enlarged schematic diagram of a local structure N in the battery shown;

[0051] Fig. 22 for Figure 2 The structural schematic diagram of the smoke guide frame in the battery shown;

[0052] Fig.23 for Fig. 22 A top view of the smoke guide frame shown;

[0053] Fig.24 for Fig.23 The cross-sectional view of the smoke guide frame along the RR direction is shown;

[0054] Fig.25 for Fig. 22 A front view of the smoke guide frame shown;

[0055] Fig.26 for Figure 2 A schematic diagram of the structure of the insulating and heat-shielding sheet in the battery shown;

[0056] Fig. 27 for Fig.26 An enlarged schematic diagram of a local structure K in the battery shown;

[0057] Fig.28 for Figure 2 Schematic diagram of the structure of the busbar in the battery shown.

[0058] Figure Number:

[0059] 1000. Battery;

[0060] 10. Box body; 20. Battery unit; 30. Smoke guide frame; 40. Mounting seat; 50. Insulation and heat insulation sheet; 60. First sealing member; 70. Second sealing member; 80. Bus bar; 90. Thermal conductive adhesive; 110. Box body sealing pad;

[0061] 11. Sub-cavity; 12. Smoke exhaust channel; 13. First beam; 13a. Smoke inlet; 13b. First smoke exhaust cavity; 14. Second beam; 14a. Smoke outlet; 14b. Second smoke exhaust cavity; 15. Frame; 16. First cover plate; 17. Second cover plate; 18. Battery explosion-proof valve;

[0062] 21, battery cell; 21a, battery cell explosion-proof valve; 21b, pole; 21c, first boundary; 21d, second boundary;

[0063] 31. Smoke guide channel; 31a. Smoke guide inlet; 31b. Smoke guide cavity; 31c. Smoke guide outlet; 32. Smoke guide portion; 33. Fireproof layer; 34. Connecting portion;

[0064] 41. screw; 42. nut; 43. threaded hole;

[0065] 51, weak portion; 51a, first groove portion; 51b, second groove portion;

[0066] 61. The first avoidance hole;

[0067] 71. The second avoidance hole;

[0068] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0069] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 present application.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0075] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0076] The battery consists of multiple cells. During the operation of the battery, when the battery loses control, the high-temperature conductive material sprayed from the cell explosion-proof valve into the battery may easily cause a short circuit of the poles, ablation of the sampling harness in the battery, arcing, etc., creating electrical risks.

[0077] See also Figures 1 to 19In order to alleviate the above problems, the applicant has designed a battery 1000 after in-depth research. The battery 1000 includes a box body 10, a battery unit 20 and a smoke guide frame 30. The box body 10 has a receiving cavity and a smoke exhaust channel 12. The battery unit 20 and the smoke guide frame 30 are both located in the receiving cavity. The battery unit 20 has a first side and a second side that are arranged opposite to each other along a first direction X. The battery unit 20 includes a first battery cell module and a second battery cell module that are alternately arranged and connected in series. The first battery cell module and the second battery cell module each include at least one battery cell 21 or at least two parallel battery cells 21. The battery cell 21 has a battery cell explosion-proof valve 21a. All battery cell explosion-proof valves 21a of the first battery cell module face the first side, and all battery cell explosion-proof valves 21a of the second battery cell module face the second side. The first side and the second side of the battery unit 20 are both provided with a smoke guide frame 30, and the smoke guide frame 30 has a plurality of smoke guide channels 31. On the same side of the battery unit 20, all the smoke guide channels 31 on the smoke guide frame 30 correspond one-to-one with all the battery cell explosion-proof valves 21a. The first side and the second side of the battery unit 20 are both provided with a plurality of smoke inlets 13a of the smoke exhaust channel 12. On the same side of the battery unit 20, the smoke guide channels 31 correspond one-to-one with the smoke inlets 13a of the smoke exhaust channel 12, and the smoke guide channels 31 are connected between the corresponding battery cell explosion-proof valves 21a and the smoke inlets 13a.

[0078] The box 10 refers to a component that isolates the internal environment of the battery 1000 from the external environment of the battery 1000. The box 10 can be a cylinder, a cuboid or other shapes, which can be set according to needs and are not limited here. Optionally, the box 10 is made of a material with a certain hardness and strength (such as aluminum alloy), so that the box 10 is not easily deformed when squeezed and collided, so that the box 10 can have a higher structural strength and the safety performance can also be improved.

[0079] The box 10 has a receiving cavity inside, and a smoke exhaust channel 12 is provided on the box 10. The smoke exhaust channel 12 is used to discharge the high-temperature smoke and high-temperature conductive materials generated when the battery 1000 is in thermal runaway. Specifically, the box 10 generally includes a first cover plate 16, a second cover plate 17 and a frame 15. The frame 15 is structured to form a receiving cavity. The frame 15 is connected between the first cover plate 16 and the second cover plate 17. The first cover plate 16 and the second cover plate 17 seal the receiving cavity. The smoke exhaust channel 12 is structured to form at least one of the first cover plate 16, the second cover plate 17 and the frame 15.

[0080] According to the different installation orientations of the box body 10, the first cover plate 16 can be one of the top cover and the bottom cover of the box body 10, and the second cover plate 17 can be the other of the top cover and the bottom cover of the box body 10. Figure 2For example, the first cover plate 16 is the top cover and the second cover plate 17 is the bottom cover. However, during the actual installation process, the box body 10 needs to be flipped 180° and the first cover plate 16 is flipped to the bottom of the second cover plate 17, so that the first cover plate 16 forms the bottom cover and the second cover plate 17 forms the top cover.

[0081] In addition, in order to block water vapor and reduce the risk of external water vapor entering the box body 10, a box body sealing gasket 110 is further provided between the first cover plate 16 and the frame 15, and / or between the second cover plate 17 and the frame 15. The box body sealing gasket 110 located between the first cover plate 16 and the frame 15 is used to seal the gap between the first cover plate 16 and the frame 15, and the box body sealing gasket 110 located between the second cover plate 17 and the frame 15 is used to seal the gap between the second cover plate 17 and the frame 15.

[0082] The number of cells 21 included in the first cell module and the second cell module is not limited. Fig.10 and Fig.12 For example, the first battery cell module and the second battery cell 21 each include only one battery cell 21. Of course, the number of battery cells 21 in the first battery cell module and the second battery cell module is not limited to the above one, and can also be in other forms, as long as the battery cells 21 in the same first battery cell module or the same second battery cell module are connected in parallel, and the adjacent first battery cell modules and second battery cell modules are connected in series.

[0083] The battery cell 21 has an explosion-proof valve, a positive pole 21b and a negative pole 21b, the positive pole 21b and the negative pole 21b are arranged at both ends of the battery cell 21 along the first direction X, and the battery cell explosion-proof valve 21a and the positive pole 21b or the negative pole 21b are arranged at the same end of the battery cell 21. Fig.12 For example, the battery cell explosion-proof valve 21 a and the positive electrode column 21 b are disposed at the same end of the battery cell 21 .

[0084] In the battery 1000, the number of the battery cells 20 may be one or more, which is specifically set according to the requirements. When there are multiple battery cells 20, all the battery cells 20 may be arranged along the first direction X and / or the second direction Y, and the second direction Y is a direction intersecting with the first direction X. Figure 1 For example, the first direction X is the width direction of the battery 1000 , and the second direction Y is the length direction of the battery 1000 .

[0085] As an example, the smoke guide frame 30 can be made of glass fiber material, steel material, pure mica material, etc. with high temperature resistance. Alternatively, the smoke guide frame 30 can also be made of glass fiber material, steel material, pure mica material, etc. and composite material, which can be selected according to needs.

[0086] The first side and the second side of the battery unit 20 arranged along the first direction X both have a battery cell explosion-proof valve 21a, a smoke guide frame 30, and a smoke inlet 13a of the smoke exhaust channel 12. On the same side of the battery unit 20, the smoke guide channel 31 corresponds to the smoke inlet 13a of the smoke exhaust channel 12 one by one, and the smoke guide channel 31 is connected between the corresponding battery cell explosion-proof valve 21a and the smoke inlet 13a. Therefore, the high-temperature conductive material sprayed from the battery cell explosion-proof valve 21a follows the high-temperature flue gas through the smoke guide channel 31 corresponding to the battery cell explosion-proof valve 21a and the corresponding smoke inlet 13a into the smoke exhaust channel 12, and is discharged to the outside of the battery 1000 after flowing through the smoke exhaust channel 12. In this way, the high-temperature flue gas and the high-temperature conductive material can be guided for directional injection, and the thermal and electrical separation of the battery 1000 is realized, thereby reducing the electrical risks of the high-temperature conductive material sprayed into the battery 1000, causing the pole 21b to short-circuit, the sampling harness in the battery 1000 to burn, and the arcing, etc., thereby achieving the purpose of isolating the high-temperature conductive material from the pole 21b of the battery cell 21, and the safety of the battery 1000 is significantly improved.

[0087] In addition, the first battery cell module and the second battery cell module each include at least one battery cell 21 or at least two battery cells 21 connected in parallel, the battery cell 21 has a battery cell explosion-proof valve 21a, all battery cell explosion-proof valves 21a of the first battery cell module face the first side, and all battery cell explosion-proof valves 21a of the second battery cell module face the second side. Under this design, on the one hand, with the cooperation of the smoke guide frame 30 and the smoke inlet 13a, the high-temperature flue gas ejected from the battery cell explosion-proof valve 21a of the first battery cell module and the high-temperature flue gas ejected from the battery cell explosion-proof valve 21a of the second battery cell module can be dispersed to both sides of the battery unit 20 and discharged to the outside along different smoke exhaust paths, which can reduce The problem of low high-temperature smoke exhaust efficiency caused by high-temperature smoke concentration on one side is improved by improving the smoke exhaust efficiency and smoke exhaust safety; on the other hand, on the same side of the battery unit 20, different first battery cell modules or different second battery cell modules correspond to different smoke guide channels 31 and smoke inlet 13a, so that different first battery cell modules or different second battery cell modules have different smoke exhaust paths, and the alternating first battery cell modules and second battery cell modules can reduce the density of the smoke exhaust path on the same side of the battery unit 20, so as to avoid the high-temperature smoke concentration and loss of control during smoke exhaust due to the high density of the smoke exhaust path on the same side of the battery unit 20, which also effectively improves the smoke exhaust efficiency and smoke exhaust safety.

[0088] Please refer again Figures 2 to 9 ,as well as Figure 15 to Figure 16In some optional embodiments, the box body 10 has at least two first beams 13 arranged at intervals along a first direction X, and at least two second beams 14 arranged at intervals along a second direction Y intersecting the first direction X. Every two adjacent first beams 13 and every two adjacent second beams 14 enclose a sub-cavity 11, and a battery unit 20 and a smoke guide frame 30 are arranged in the sub-cavity 11. All sub-cavities 11 are jointly constructed to form a accommodating cavity. The first beam body 13 has a first smoke exhaust cavity 13b therein, and a smoke inlet 13a is formed on the surface of the first beam body 13 facing the smoke guide frame 30; the first and / or last second beam body 14 arranged along the second direction Y has a second smoke exhaust cavity 14b and a smoke outlet 14a, all the smoke inlets 13a on the first beam body 13 are connected to the first smoke exhaust cavity 13b and together form an air intake section of the smoke exhaust channel 12, and the first smoke exhaust cavity 13b and the smoke outlet 14a on the second beam body 14 are connected to form an air outlet section of the smoke exhaust channel 12.

[0089] All the first beams 13 and all the second beams 14 are combined and constructed to form the frame 15. The first beam 13 is any one of the horizontal beam and the longitudinal beam, and the second beam 14 is the other one of the horizontal beam and the longitudinal beam. Figure 7 For example, the first beam body 13 is a longitudinal beam, and the second beam body 14 is a transverse beam. For the convenience of description, the following embodiments are described by taking the first beam body 13 as a longitudinal beam and the second beam body 14 as a transverse beam as an example.

[0090] A battery unit 20 and two smoke guide frames 30 are disposed in each sub-cavity 11 . The two smoke guide frames 30 in the same sub-cavity 11 are located at a first side and a second side of the battery unit 20 .

[0091] As an example, the first beam body 13 and the second beam body 14 may be two, and the two first beam bodies 13 and the two second beam bodies 14 are arranged to form a sub-cavity 11, and the sub-cavity 11 is equivalent to the accommodating cavity. Alternatively, at least one of the first beam body 13 and the second beam body 14 may be more than two, so that Figure 7 As shown, there are three first beam bodies 13 and three second beam bodies 14 , which are constructed to form four sub-cavities 11 .

[0092] If the first beam 13 is a side beam (i.e., the first beam 13 or the last first beam 13 arranged along the second direction Y), a smoke inlet 13a is formed on the inner side surface of the first beam 13; if the first beam 13 is an intermediate beam located inside the side beam (i.e., the remaining first beams 13 located between the first first beam 13 and the last first beam 13 in the second direction Y), smoke inlets 13a are provided on both opposite side surfaces of the second beam 14 along the first direction X. If the same surface of the first beam 13 having smoke inlets 13a faces multiple sub-cavities 11 at the same time, the number of smoke inlets 13a provided on the surface needs to meet the needs of all sub-cavities 11 facing the surface. Figure 7and Fig. 9 For example, the same surface of the first beam 13 with the smoke inlet 13a faces two sub-cavities 11 at the same time. The surface is located on the first side of the battery unit 20 in the two sub-cavities 11, and each battery unit 20 has 14 battery cell explosion-proof valves 21a on the first side. For example, 28 smoke inlets 13a need to be opened on the surface, of which 14 smoke inlets 13a correspond one-to-one to the 14 battery cell explosion-proof valves 21a on the first side of the battery unit 20 in one of the sub-cavities 11, and the other 14 smoke inlets 13a correspond one-to-one to the 14 battery cell explosion-proof valves 21a on the first side of the battery unit 20 in the other sub-cavity 11. In addition, the number of smoke guide channels 31 on the smoke guide frame 30 must also correspond one-to-one to the number of battery cell explosion-proof valves 21a on the same side. Please refer to Figure 7 and Fig. 9 , for example, each battery unit 20 has 14 battery cell explosion-proof valves 21a on the first side, and 14 smoke guide channels 31 also need to be provided on the smoke guide frame 30 in each sub-cavity 11. In this way, on the same side of the battery unit 20, the smoke guide channel 31 can correspond to the smoke inlet 13a of the smoke exhaust channel 12 and the battery cell explosion-proof valve 21a one by one, and the smoke guide channel 31 is connected between the corresponding battery cell explosion-proof valve 21a and the smoke inlet 13a.

[0093] Each first beam 13 forms an air intake section of the smoke exhaust channel 12, and each air intake section includes the first smoke exhaust cavity 13b and all smoke inlet ports 13a on the first beam 13 where it is located. It is understandable that the smoke exhaust channel 12 has multiple air intake sections, and each air intake section has multiple smoke inlet ports 13a. Each second beam 14 having a second smoke exhaust cavity 14b forms an air outlet section of the smoke exhaust channel 12, and each air outlet section includes the second smoke exhaust cavity 14b and all smoke outlet ports 14a on the second beam 14 where it is located. It is understandable that the smoke exhaust channel 12 has one or two air outlet sections, and each air outlet section has one or more smoke outlet ports 14a. The same second beam 14 can have one or more smoke outlet ports 14a.

[0094] The first smoke exhaust cavity 13b in each first beam body 13 is connected to the second smoke exhaust cavity 14b of the second beam body 14, so that the high-temperature smoke exhausted by the battery core explosion-proof valve 21a enters through the smoke guide channel 31 corresponding to the battery core explosion-proof valve 21a and the smoke inlet 13a corresponding to the battery core explosion-proof valve 21a in sequence, and then flows through the first smoke exhaust cavity 13b of the first beam body 13 where the smoke inlet 13a is located, the second smoke exhaust cavity 14b connected to the first smoke exhaust cavity 13b, and the smoke outlet 14a to be discharged. In this embodiment, the high-temperature smoke and high-temperature conductive material ejected by different battery core explosion-proof valves 21a enter the smoke exhaust channel 12 through different smoke guide channels 31 and different smoke inlets 13a in sequence and are finally discharged, and the smoke exhaust efficiency is high.

[0095] Specific as Fig.16As shown, the high-temperature flue gas is discharged through the first beam 13 disposed in the first direction X and the second beam 14 disposed in the first direction Y in the following path: M10→M11→M12→M13, or M10→M11→M12→M9→M4. The high-temperature flue gas is discharged through the last first beam 13 disposed in the first direction X and the first second beam 14 disposed in the second direction Y in the following path: M1→M2→M3→M4, or M1→M2→M3→M8→M13. The high-temperature flue gas is discharged through the first beam 13 between the first beam 13 and the last first beam 13 and the first second beam 14 disposed in the second direction Y in the following path: M5→M7→M8→M13, or M6→M7→M9→M4.

[0096] See also Figure 2 In some optional embodiments, a battery explosion-proof valve 18 is provided at the smoke outlet 14a. When the pressure inside the battery 1000 is normal, the battery explosion-proof valve 18 is blocked at the smoke outlet 14a to reduce the risk of external water vapor, dust, etc. entering the battery 1000. When the pressure inside the battery 1000 increases abnormally, the high-temperature smoke and high-temperature conductive materials generated by the thermal runaway of the battery 1000 are released to the outside through the battery explosion-proof valve 18, thereby effectively preventing the battery 1000 from exploding due to excessive internal pressure.

[0097] Please refer again Figures 1 to 6 , and also see Figures 17 to 25 In some optional embodiments, the smoke guide frame 30 includes a smoke guide portion 32 and a connection portion 34 alternately arranged along a second direction Y intersecting the first direction X, and a smoke guide channel 31 is provided on the smoke guide portion 32. On the first side of the battery unit 20, all the smoke guide channels 31 on the smoke guide frame 30 are aligned one by one with and connected to the battery cell explosion-proof valves 21a of all the first battery cell modules, and all the connection portions 34 of the smoke guide frame 30 are aligned one by one with at least some of the second battery cell modules. On the second side of the battery unit 20, all the smoke guide channels 31 on the smoke guide frame 30 are aligned one by one with and connected to all the battery cell explosion-proof valves 21a of all the second battery cell modules, and all the connection portions 34 of the smoke guide frame 30 are aligned one by one with at least some of the first battery cell modules.

[0098] Different smoke guides 32 have different smoke exhaust paths. The smoke guides 32 are separated by the connecting part 34, which can reduce the density of the smoke exhaust paths on the same side of the battery unit 20 to avoid the high-temperature smoke concentration and loss of control during smoke exhaust due to the high density of the smoke exhaust paths on the same side of the battery unit 20. This also effectively improves the smoke exhaust efficiency and smoke exhaust safety.

[0099] In some embodiments, a surface of the smoke guide portion 32 facing the battery cell 20 is provided with a plurality of smoke guide inlets 31a arranged along the second direction Y, a smoke guide cavity 31b is provided inside the smoke guide portion 32, and a surface of the smoke guide portion 32 facing away from the battery cell 20 is provided with a smoke guide outlet 31c. In the same smoke guide portion 32, the smoke guide inlet 31a, the smoke guide cavity 31b and the smoke guide outlet 31c are connected in sequence to form a smoke guide channel 31.

[0100] It can be understood that in this embodiment, the high-temperature smoke and high-temperature conductive material entering from different smoke guide inlets 31a on the same smoke guide portion 32 are discharged through the same smoke guide outlet 31c, and the high-temperature smoke and high-temperature conductive material entering from different smoke guide inlets 31a on different smoke guide portions 32 are discharged through different smoke guide outlets 31c.

[0101] The design that the multiple smoke guide inlets 31a on the smoke guide portion 32 share the same smoke guide cavity 31b and smoke guide outlet 31c simplifies the manufacturing difficulty of the smoke guide frame 30 and helps to reduce the manufacturing cost.

[0102] In some optional embodiments, the surface of the smoke guide portion 32 on which the smoke guide outlet 31c is provided is the first surface, and the surface of the smoke guide portion 32 on which the smoke guide inlet 31a is provided is the second surface. In the direction from the first surface to the second surface, the width of the smoke guide portion 32 in the second direction Y and / or the third direction Z gradually decreases, and the third direction Z intersects with both the first direction X and the second direction Y. Figure 1 For example, the third direction Z is the vertical direction. Under this design, after the battery unit 20 is installed, the smoke guide frame 30 can be operated to first insert the end of the smoke guide portion 32 with a smaller width obliquely between the battery unit 20 and the first beam body 13, and then the end of the smoke guide portion 32 with a larger width is pressed hard to squeeze the end into between the battery unit 20 and the first beam body 13, thereby facilitating the installation of the smoke guide frame 30.

[0103] Combination Fig.23 and Fig.24 In some optional embodiments, the inner wall of the smoke guiding cavity 31b is covered with a fireproof layer 33. For example, the fireproof layer 33 can be glass fiber cloth, steel, pure mica cloth, etc., and can be specifically set according to needs.

[0104] When high-temperature smoke and high-temperature conductive materials enter the smoke guide cavity 31b, the fireproof layer 33 blocks the smoke guide frame 30 and the high-temperature smoke, reducing the impact of the high-temperature smoke on the smoke guide frame 30 and the risk of the smoke guide frame 30 melting or even catching fire due to high temperature, making the battery 1000 safer to use.

[0105] Combination Figure 7 and Figure 8 , Fig. 20 and Fig.23In some optional embodiments, the battery 1000 further includes a mounting seat 40, and the mounting seat 40 is disposed on the first side and the second side of the battery unit 20. The mounting seat 40 is mounted on the box body 10 on the same side of the battery unit 20, and the mounting seat 40 corresponds to the connecting portion 34 one by one. The mounting seat 40 is disposed on one side of the corresponding connecting portion 34 along a third direction Z intersecting the first direction X and the second direction Y, and is detachably connected to the corresponding connecting portion 34.

[0106] Specifically, the mounting seat 40 is disposed on a side of the connecting portion 34 facing the second cover plate 17 and is connected to the first beam body 13 .

[0107] The mounting seat 40 and the smoke guide frame 30 can be detachably connected to the connecting portion 34 by means of screws 41, pins, etc. For example, threaded holes 43 are provided on the mounting seat 40 and the connecting portion 34, and screws 41 are simultaneously passed through the threaded holes 43 on the mounting seat 40 and the connecting portion 34, and locked by nuts 42.

[0108] By arranging the mounting seat 40 and the connecting portion 34 to correspond to each other one by one, the stability and reliability of the installation of the smoke guide frame 30 are ensured.

[0109] In some optional embodiments, as an example, the connecting portion 34 includes a first connecting plate and a second connecting plate bent relative to the first connecting plate, the first connecting plate is connected between the surfaces of two adjacent smoke guide portions 32 facing the battery cell 20 in the first direction X, and the second connecting plate is connected between the surfaces of two adjacent smoke guide portions 32 arranged in the third direction Z.

[0110] Taking the example of the connection between the connecting part 34 and the mounting seat 40 through the screw 41 and the nut 42, the screw 41 is pre-installed on the mounting seat 40, the threaded hole 43 on the smoke guide frame 30 is aligned with the screw 41 on the mounting seat 40, and then the smoke guide frame 30 is pressed so that the screw 41 on the mounting seat 40 is inserted into the threaded hole 43 on the smoke guide frame 30, and then the nut 42 is locked on the screw 41.

[0111] By designing the connecting portion 34 in this form, the connecting portion 34 and the mounting seat 40 can be easily installed and the operation is simple.

[0112] Combination Figure 2 , Figure 5 , Figure 6 and Fig.19In some optional embodiments, the side of the smoke guide frame 30 facing away from the mounting seat 40 is bonded to the box body 10 by means of a thermally conductive adhesive 90. Specifically, the smoke guide frame 30 is bonded to the first cover plate 16 by means of the thermally conductive adhesive 90, and the thermally conductive adhesive 90 bonds all the battery cells 20 and all the smoke guide frames 30 to the first cover plate 16. On the one hand, the battery cells 20 and the smoke guide frames 30 can be fixed relative to the box body 10 after being bonded by means of the thermally conductive adhesive 90, so as to reduce the risk of the battery 1000 sliding relative to the box body 10 and colliding with the box body 10 during transportation or use, thereby increasing the service life of the battery 1000; on the other hand, the thermally conductive adhesive 90 can also be used to quickly transfer the heat on the battery cells 20 and the smoke guide frames 30 to the first cover plate 16, and diffuse the heat from the first cover plate 16 to the outside, thereby significantly improving the heat dissipation effect of the battery 1000.

[0113] In the present application, the thermal conductive adhesive 90 cooperates with the mounting seat 40 to fix and position the smoke guide frame 30 on both sides of the smoke guide frame 30 along the third direction Z, and has better installation reliability and stability.

[0114] Please refer to Figures 2 to 6 , Figures 9 to 14 , Figures 17 to 27 In some optional embodiments, the battery 1000 further includes an insulating heat-insulating sheet 50, and the insulating heat-insulating sheet 50 is disposed on the first side and the second side of the battery unit 20. On the same side of the battery unit 20, the insulating heat-insulating sheet 50 is disposed between the smoke guide frame 30 and all the battery cell explosion-proof valves 21a. Specifically, the number of the insulating heat-insulating sheets 50 and the smoke guide frame 30 is the same and corresponds one to one.

[0115] As an example, the insulating sheet 50 may be a mica paper sheet, a glass fiber sheet, etc., and the specific setting may be based on the requirements.

[0116] The insulating heat-insulating sheet 50 has a good insulation effect. Therefore, it is difficult for the heat on the battery unit 20 to be transferred to the smoke guide frame 30 and the box body 10 through the insulating heat-insulating sheet 50, so as to avoid overheating of the smoke guide frame 30 and the box body 10, thereby improving the service life of the battery 1000. In addition, the insulating heat-insulating sheet 50 also has a good insulation effect. When the battery unit 20 fails and short-circuits, the current cannot be transferred to the box body 10 through the insulating heat-insulating sheet and the smoke guide frame 30, thereby ensuring the safety of the battery 1000.

[0117] Please refer to Figures 10 to 14 ,as well as Figures 17 to 19In some optional embodiments, the battery cell explosion-proof valve 21a has a first boundary 21c and a second boundary 21d arranged at intervals along a third direction Z intersecting the first direction X, and the second boundary 21d is located at the bottom side of the first boundary 21c. On the same side of the battery unit 20, the two ends of the insulating heat-insulating sheet 50 arranged along the third direction Z extend out of the first boundary 21c and the second boundary 21d of the battery cell explosion-proof valve 21a, respectively, and the insulating heat-insulating sheet 50 extends out of the highest point of the first boundary 21c (such as Fig.13 The lowest point of the second boundary 21d (as shown in point P1 in FIG. Fig.13 The length of the P2 point is L (as shown in Fig.13 As shown), 1.5mm<L<2.5mm. The heat-insulating sheet extends out of the first boundary 21c and the second boundary 21d of all the battery cell explosion-proof valves 21a of the battery unit 20 in the height direction of the box body 10, thereby reducing the risk of high-temperature smoke spreading along the third direction Z to the periphery of the battery unit 20.

[0118] Combination Figures 3 to 6 , Fig.19 , Fig.26 and 27 In some optional embodiments, a plurality of weak portions 51 are formed on the insulating heat-insulating sheet 50. On the same side of the battery unit 20, at least some of the weak portions 51 on the insulating heat-insulating sheet 50 are aligned one by one with all the battery cell explosion-proof valves 21a and all the smoke guide channels 31 on the smoke guide frame 30.

[0119] The alignment of the two components means that the geometric centers of the two components are both on the central axis of one of the components.

[0120] At least part of the weak portions 51 on the insulating heat insulation sheet 50 are aligned one by one with all the smoke guiding channels 31 on the smoke guide frame 30. As an example, the number of all the weak portions 51 on the insulating heat insulation sheet 50 and all the smoke guiding channels 31 on the smoke guide frame 30 may be the same and aligned one by one. Alternatively, the number of all the weak portions 51 on the insulating heat insulation sheet 50 may be twice the number of all the smoke guiding channels 31 on the smoke guide frame 30, and half of the weak portions 51 on the insulating heat insulation sheet 50 may be aligned one by one with all the smoke guiding channels 31 on the smoke guide frame 30.

[0121] Combination Fig. 9 and Fig.26As shown, the first battery cell module and the second battery cell module each include a battery cell 21. In this embodiment, when the number of all weak portions 51 on the insulating heat insulation sheet 50 is twice the number of all smoke guide channels 31 on the smoke guide frame 30, on the first side of the battery unit 20, in the second direction Y, the weak portions 51 are alternately aligned with the battery cell explosion-proof valve 21a or the second battery cell module, and on the second side of the battery unit 20, in the second direction Y, the weak portions 51 are alternately aligned with the battery cell explosion-proof valve 21a or the first battery cell module. That is, in each of two adjacent weak portions 51, when one of the weakened portions is aligned with the battery cell explosion-proof valve 21a of one of the first battery cell module and the second battery cell module, the other weakened portion is aligned with the other of the first battery cell module and the second battery cell module. When the number of all weak parts 51 on the insulating and heat-insulating sheet 50 is twice the number of all smoke guiding channels 31 on the smoke guiding frame 30, the insulating and heat-insulating sheet 50 is also suitable for an embodiment in which the cell explosion-proof valves 21a of the first cell module and the second cell module in the battery unit 20 are located on the same side, and the insulating and heat-insulating sheet 50 has a wider range of applications.

[0122] As an example, the weak portion 51 is formed by peeling, stamping, etc., and is generally a groove structure, and the notch of the weak portion 51 faces the corresponding battery cell explosion-proof valve 21a. The thickness at the weak portion 51 is less than the thickness at other positions of the insulating heat-insulating sheet 50. Therefore, when the battery 1000 has thermal runaway, the high-temperature smoke can break through the weak portion 51, and enter the exhaust channel 12 through the weak portion 51, the smoke guide channel 31 aligned with the weak portion 51, and the smoke inlet 13a aligned with the smoke guide channel 31, and finally discharged to the outside of the battery 1000.

[0123] As an example, the weak portion 51 is a groove structure, and the weak portion 51 includes a first groove portion 51a and a second groove portion 51b, the first groove portion 51a surrounds to form a closed groove structure, the second groove portion 51b is located in the area surrounded by the first groove portion 51a, and is connected and communicated with the first groove portion 51a, and the second groove portion 51b is a cross-shaped structure. In the event of thermal runaway, the high-temperature flue gas ejected from the battery cell explosion-proof valve 21a opens the first groove portion 51a and the second groove portion 51b, and is discharged through the smoke guide channel 31 and the smoke exhaust channel 12. This form of weak portion 51 is easily opened by high-temperature flue gas, ensuring that the high-temperature flue gas can be discharged through the insulating heat insulation sheet 50.

[0124] In some embodiments, see Figures 9 to 11 , Fig.13, in the first direction X, the orthographic projections of the weak portion 51 and the smoke inlet 31a of the smoke guide channel 31 both fall into the corresponding battery core explosion-proof valve 21a; the cross-sectional area of ​​the weak portion 51 perpendicular to the first direction X, and the cross-sectional area of ​​the smoke inlet 31a of the smoke guide channel 31 are both smaller than the cross-sectional area of ​​the corresponding battery core explosion-proof valve 21a perpendicular to the first direction X. In this way, the possibility of high-temperature smoke spreading to the surrounding area can be reduced, ensuring that the high-temperature smoke ejected from the battery core explosion-proof valve 21a can only be discharged through the weakened portion, the smoke guide channel 31 and the smoke exhaust channel 12 in sequence, and the discharge reliability is high.

[0125] Furthermore, in some embodiments, the cross-sectional area of ​​the weak portion 51 perpendicular to the first direction X (the area of ​​the area surrounded by the first groove portion 51a, such as Fig. 27 S3 in the figure), and the cross-sectional area of ​​the smoke guide inlet 31a of the smoke guide channel 31 (the area of ​​the area surrounded by the outer contour of the smoke guide inlet 31a, as shown in FIG. Fig.25 The cross-sectional area of ​​the corresponding explosion-proof valve 21a perpendicular to the first direction X (such as Fig.13 In this embodiment, the risk of high-temperature smoke discharged from the high-cell explosion-proof valve 21a spreading to the surrounding area can be reduced, ensuring that the high-temperature smoke can only be discharged through the weakened portion, the smoke guide channel 31 and the smoke exhaust channel 12 in sequence. In addition, the weak portion 51 and the smoke guide inlet 31a of the smoke guide channel 31 can also have a larger cross-sectional area to allow the high-temperature smoke to be quickly discharged.

[0126] See also Figures 2 to 6 , Figures 9 to 11 , Figures 19 to 21 In some optional embodiments, the battery 1000 further includes a first seal 60, which is disposed on both the first side and the second side of the battery cell 20, and a plurality of first avoidance holes 61 are provided on the first seal 60; on the same side of the battery cell 20, the first seal 60 is sealed and connected between the insulating heat-insulating sheet 50 and the smoke guide frame 30, and all the first avoidance holes 61 on the first seal 60 are aligned one by one with all the weak parts 51 on the insulating heat-insulating sheet 50. The battery 1000 further includes a second seal 70, which is disposed on both the first side and the second side of the battery cell 20, and a plurality of second avoidance holes 71 are provided on the second seal 70; on the same side of the battery cell 20, the second seal 70 is sealed and connected between the smoke guide frame 30 and the box body 10, and all the second avoidance holes 71 on the first seal 60 are aligned one by one with all the smoke guide outlets 31c on the smoke guide frame 30 and are connected.

[0127] The number of the first seals 60 and the second seals 70 is the same as the number of the smoke guide frames 30, and the first seals 60 and the second seals 70 correspond one-to-one to the smoke guide frames 30. The first seals 60 are arranged between the corresponding insulating and heat insulating sheets 50 and the corresponding smoke guide frames 30, and the second seals 70 are arranged between the corresponding smoke guide frames 30 and the first beam body 13.

[0128] Specifically, the first avoidance holes 61 on the first sealing member 60 are aligned one by one with the weak portion 51 on the insulating heat-insulating sheet 50 , and the second avoidance holes 71 on the second sealing member 70 are aligned one by one with the smoke guide outlets 31 c on the smoke guide frame 30 and are connected.

[0129] During actual smoke exhaust, the exhaust path of the high-temperature smoke is: battery cell explosion-proof valve 21a → breaking through the weak part 51 of the insulating and heat-insulating sheet 50 → the first avoidance hole 61 of the first sealing member 60 → the smoke guide inlet 31a of the smoke guide frame 30 → the smoke guide cavity 31b of the smoke guide frame 30 → the smoke inlet 13a of the first beam body 13 → the first smoke exhaust cavity 13b of the first beam body 13 → the second smoke exhaust cavity 14b of the second beam body 14 → discharge from the battery explosion-proof valve 18.

[0130] The first seal 60 is used to seal the gap between the smoke guide frame 30 and the battery unit 20, and the second seal 70 is used to seal the gap between the smoke guide frame 30 and the first beam 13. By providing the first seal 60 and the second seal 70, the smoke guide frame 30 and the battery unit 20 and the box body 10 have better sealing performance, reducing the risk of high-temperature smoke diffusion in the box body 10, ensuring that the high-temperature smoke can only be discharged from the smoke guide channel 31 and the smoke exhaust channel 12.

[0131] As an example, the first sealing member 60 and the second sealing member 70 are both silicone pads. After heat diffusion, the silicone pads can harden and maintain the sealing mode, thereby achieving a better sealing effect of the first sealing member 60 and the second sealing member 70. Of course, the first sealing member 60 and the second sealing member 70 can also be rubber pads or other sealing forms, such as a sealing rubber layer. Figure 2 , Fig.21 and Fig.28 In some embodiments, the first side and the second side of the battery unit 20 further have a bus bar 80, which is connected to the pole 21b of the battery unit 20 on the same side of the battery unit 20, and the bus bar 80 is arranged on one side of the smoke guide frame 30 along the third direction Z and contacts the smoke guide frame 30. Specifically, the bus bar 80 and the mounting seat 40 are arranged on the same side of the smoke guide frame 30, and the bus bar 80 plays an auxiliary limiting role for the smoke guide frame 30 during the assembly process.

[0132] Taking the installation of the battery 1000 on an electric vehicle as an example, during the actual assembly, the frame 15 and the second cover plate 17 are first assembled, and at this time, the second cover plate 17 is located at the bottom of the battery 1000. Then all the battery cells 20 and the busbar 80 welded to the battery cells 20 are placed in the frame 15. Next, the insulating heat-insulating sheet 50 is bonded to the battery core explosion-proof valve 21a, and then the first seal 60, the smoke guide frame 30 and the second seal 70 that are bonded together are squeezed and installed into the gap between the insulating heat-insulating sheet 50 and the first beam 13, and the smoke guide frame 30 is allowed to contact the busbar 80 and the mounting seat 40, and the smoke guide frame 30 is connected to the mounting seat 40. Next, the box sealing gasket 110 and the first cover plate 16 are sequentially installed on the frame 15 and assembled to form the battery 1000, and at this time, the first cover plate 16 is located at the top of the battery 1000. Finally, the battery 1000 is turned over 180° so that the first cover plate 16 faces downward and is located at the bottom of the battery 1000, and the second cover plate 17 faces and is located at the top of the battery 1000, and then the battery 1000 is installed on the chassis of the electric vehicle.

[0133] The present application also provides an electrical device, which includes the battery 1000 as described in any one of the embodiments, and the battery 1000 is used to provide electrical energy to the electrical device.

[0134] The electrical device in the present application has the effects described in any of the above embodiments, so they will not be described in detail here.

[0135] The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0136] It should be understood that the technical solutions described in the embodiments of the present application are not limited to being applicable to the electrical devices described above.

[0137] In the above-mentioned battery 1000 and the electrical device, the first side and the second side of the battery unit 20 arranged along the first direction X are provided with a battery cell explosion-proof valve 21a, a smoke guide frame 30 and a smoke inlet 13a of the smoke exhaust channel 12. On the same side of the battery unit 20, the smoke guide channel 31 corresponds to the smoke inlet 13a of the smoke exhaust channel 12 one by one, and the smoke guide channel 31 is connected between the corresponding battery cell explosion-proof valve 21a and the corresponding smoke inlet 13a. Therefore, the high-temperature conductive material sprayed from the battery cell explosion-proof valve 21a follows the high-temperature flue gas through the smoke guide channel 31 and the smoke inlet 13a corresponding to the battery cell explosion-proof valve 21a into the smoke exhaust channel 12, and is discharged to the outside of the battery 1000 after flowing through the smoke exhaust channel 12. In this way, the high-temperature flue gas and the high-temperature conductive material can be guided for directional injection, and the thermal and electrical separation of the battery 1000 can be achieved, thereby reducing the electrical risks of the high-temperature conductive material sprayed into the battery 1000, causing the pole 21b to short-circuit, the sampling harness in the battery 1000 to burn, and the arcing, etc., thereby achieving the purpose of isolating the high-temperature conductive material from the pole 21b of the battery cell 21, and the safety of the battery 1000 is significantly improved.

[0138] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery, characterized in that: The battery comprises a box body (10), a battery unit (20) and a smoke guide frame (30); the box body (10) has a receiving cavity and a smoke exhaust passage (12); the battery unit (20) and the smoke guide frame (30) are both located in the receiving cavity; The battery unit (20) has a first side and a second side arranged opposite to each other along a first direction (X), the battery unit (20) comprises a first battery cell module and a second battery cell module which are arranged alternately and connected in series, the first battery cell module and the second battery cell module each comprising at least one battery cell (21) or at least two battery cells (21) connected in parallel, the battery cell (21) having a battery cell explosion-proof valve (21a), all the battery cell explosion-proof valves (21a) of the first battery cell module facing the first side, and all the battery cell explosion-proof valves (21a) of the second battery cell module facing the second side; The first side and the second side of the battery unit (20) are both provided with the smoke guide frame (30), the smoke guide frame (30) having a plurality of smoke guide channels (31), and on the same side of the battery unit (20), all the smoke guide channels (31) on the smoke guide frame (30) correspond one-to-one to all the battery cell explosion-proof valves (21a); The first side and the second side of the battery unit (20) are both provided with a plurality of smoke inlets (13a) of the smoke exhaust channel (12); on the same side of the battery unit (20), the smoke guide channel (31) corresponds one to one with the smoke inlets (13a) of the smoke exhaust channel (12); the smoke guide channel (31) is connected between the corresponding battery cell explosion-proof valve (21a) and the smoke inlet (13a).

2. The battery according to claim 1, characterized in that The box body (10) comprises at least two first beam bodies (13) arranged at intervals along the first direction (X), and at least two second beam bodies (14) arranged at intervals along a second direction (Y) intersecting the first direction (X), each adjacent two first beam bodies (13) and each adjacent two second beam bodies (14) enclose a sub-cavity (11), the battery unit (20) and the smoke guide frame (30) are arranged in the sub-cavity (11), and all the sub-cavities (11) are constructed together to form the accommodating cavity; The first beam body (13) has a first smoke exhaust cavity (13b) therein, and the surface of the first beam body (13) facing the smoke guide frame (30) is provided with the smoke inlet (13a); the first and / or last second beam body (14) arranged along the second direction (Y) is provided with a second smoke exhaust cavity (14b) and a smoke outlet (14a), all the smoke inlets (13a) on the first beam body (13) are connected to the first smoke exhaust cavity (13b) and are jointly constructed to form an air intake section of the smoke exhaust channel (12), and the first smoke exhaust cavity (13b) and the smoke outlet (14a) on the second beam body (14) are connected to form an air outlet section of the smoke exhaust channel (12).

3. The battery according to claim 2, characterized in that A battery explosion-proof valve (18) is provided at the smoke outlet (14a).

4. The battery according to any one of claims 1 to 3, characterized in that: The smoke guide frame (30) comprises a smoke guide portion (32) and a connecting portion (34) alternately arranged along a second direction (Y) intersecting the first direction (X), and the smoke guide portion (32) is provided with the smoke guide channel (31); On the first side of the battery unit (20), all the smoke guide channels (31) on the smoke guide frame (30) are aligned one by one with and connected to the battery cell explosion-proof valves (21a) of all the first battery cell modules, and all the connecting parts (34) of the smoke guide frame (30) are aligned one by one with at least part of the second battery cell modules; On the second side of the battery unit (20), all of the smoke guide channels (31) on the smoke guide frame (30) are aligned one by one with and connected to all of the battery cell explosion-proof valves (21a) of all of the second battery cell modules, and all of the connecting parts (34) of the smoke guide frame (30) are aligned one by one with at least part of the first battery cell modules.

5. The battery according to claim 4, characterized in that The surface of the smoke guide portion (32) facing the battery unit (20) is provided with a plurality of smoke guide inlets (31a) arranged along the second direction (Y), the smoke guide portion (32) has a smoke guide cavity (31b) therein, and the surface of the smoke guide portion (32) facing away from the battery unit (20) is provided with a smoke guide outlet (31c), and in the same smoke guide portion (32), the smoke guide inlet (31a), the smoke guide cavity (31b) and the smoke guide outlet (31c) are sequentially connected to form the smoke guide channel (31).

6. The battery according to claim 5, characterized in that The surface of the smoke guiding portion (32) on which the smoke guiding outlet (31c) is provided is a first surface, and the surface of the smoke guiding portion (32) on which the smoke guiding inlet (31a) is provided is a second surface; in the direction from the first surface to the second surface, the width of the smoke guiding portion (32) in the second direction (Y) and / or the third direction (Z) gradually decreases, and the third direction (Z) intersects with both the first direction (X) and the second direction (Y).

7. The battery according to claim 5, characterized in that The inner wall of the smoke guiding cavity (31b) is covered with a fireproof layer (33).

8. The battery according to claim 5, characterized in that The battery further comprises a mounting seat (40), the mounting seat (40) being arranged on the first side and the second side of the battery unit (20), the mounting seat (40) being installed on the box body (10) on the same side of the battery unit (20), and the mounting seat (40) and the connecting portion (34) corresponding one to one, the mounting seat (40) being arranged on one side of the corresponding connecting portion (34) along a third direction (Z) intersecting both the first direction (X) and the second direction (Y), and being detachably connected to the corresponding connecting portion (34).

9. The battery according to claim 8, characterized in that The side of the smoke guide frame (30) facing away from the mounting seat (40) is bonded to the box body (10) via a heat-conducting adhesive (90).

10. The battery according to claim 1, characterized in that The battery further comprises an insulating heat-insulating sheet (50), the first side and the second side of the battery unit (20) are both provided with an insulating heat-insulating sheet (50), and on the same side of the battery unit (20), the insulating heat-insulating sheet (50) is provided between the smoke guide frame (30) and all the battery cell explosion-proof valves (21a).

11. The battery according to claim 10, characterized in that The battery cell explosion-proof valve (21a) has a first boundary (21c) and a second boundary (21d) arranged at intervals along a third direction (Z) intersecting the first direction (X), and the second boundary (21d) is located at the bottom side of the first boundary (21c); on the same side of the battery unit (20), two ends of the insulating heat-insulating sheet (50) arranged along the third direction (Z) respectively extend out of the first boundary (21c) and the second boundary (21d) of the battery cell explosion-proof valve (21a), and the length of the insulating heat-insulating sheet (50) extending from the highest point of the first boundary (21c) and the lowest point of the second boundary (21d) is L, and 1.5 mm < L < 2.5 mm.

12. The battery according to claim 10, characterized in that A plurality of weak portions (51) are formed on the insulating heat-insulating sheet (50); on the same side of the battery unit (20), at least some of the weak portions (51) on the insulating heat-insulating sheet (50) are aligned one by one with all of the battery cell explosion-proof valves (21a) and all of the smoke guide channels (31) on the smoke guide frame (30).

13. The battery according to claim 12, characterized in that In the first direction (X), the orthographic projections of the weak portion (51) and the smoke guide inlet (31a) of the smoke guide channel (31) both fall into the corresponding battery core explosion-proof valve (21a); The cross-sectional area of ​​the weak portion (51) perpendicular to the first direction (X) and the cross-sectional area of ​​the smoke guide inlet (31a) of the smoke guide channel (31) are both smaller than the cross-sectional area of ​​the corresponding battery core explosion-proof valve (21a) perpendicular to the first direction (X).

14. The battery according to claim 13, characterized in that The cross-sectional area of ​​the weak portion (51) perpendicular to the first direction (X) and the cross-sectional area of ​​the smoke guide inlet (31a) of the smoke guide channel (31) are both approximately 80% of the cross-sectional area of ​​the corresponding battery core explosion-proof valve (21a) perpendicular to the first direction (X).

15. The battery according to claim 12, characterized in that The battery further comprises a first sealing member (60), and the first side and the second side of the battery unit (20) are both provided with the first sealing member (60), and a plurality of first avoidance holes (61) are provided on the first sealing member (60); on the same side of the battery unit (20), the first sealing member (60) is sealedly connected between the insulating heat-insulating plate (50) and the smoke guide frame (30), and all the first avoidance holes (61) on the first sealing member (60) are aligned one by one with all the weak portions (51) on the insulating heat-insulating plate (50).

16. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 15, wherein the battery is used to provide electrical energy to the electrical device.

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