Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment, and belongs to the technical field of batteries, according to the battery pack, a protection part is arranged on the side, away from a second wall in the third direction, of a first wall of a box body, the protection part comprises a supporting beam and a protection beam, the supporting beam comprises a body part and a supporting part arranged on the body part in a protruding mode, and the supporting part is provided with a containing cavity; the protective beam is inserted into the containing cavity, a gap is formed between the protective beam and the top wall of the containing cavity, so that the protective beam can move in the third direction, and when the side, close to the first wall, of the box body of the battery pack is in contact with an obstacle and is impacted, the protective beam firstly makes contact with the obstacle and gets close to the supporting beam under the action of impact force; the protective beams are arranged on the supporting beams to buffer and absorb the impact force, so that the impact force on the box body is reduced, and after the impact force is weakened or disappears, the protective beams can be far away from the supporting beams in the third direction to absorb and buffer the next impact force, so that the use safety of the battery pack is effectively improved, and the service life of the battery pack is effectively prolonged.

Description

Technical Field

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

[0002] In existing battery packs, the protection of the bottom of the box is relatively simple, and most of them only use a bottom guard plate as the bottom protection. When the battery pack is bumped or hit, there is a risk of the bottom guard plate breaking, which in turn causes safety hazards such as short circuits and leakage in the liquid cooling plate and battery cells inside the box, affecting the safety and service life of the battery pack. Summary of the Invention

[0003] The purpose of this application is to provide a battery pack and electrical equipment to solve the problem that the bottom protection of the current battery pack box is weak, which affects the service life and safety of the battery pack.

[0004] A first aspect of an embodiment of the present application provides a battery pack having a first direction and a third direction that are perpendicular to each other, the battery pack comprising: a box body, the box body having a first wall and a second wall, the first wall and the second wall being relatively arranged on both sides of the box body in the third direction; a protective member being arranged on a side of the first wall away from the second wall along the third direction, the protective member comprising a support beam and a protective beam; the support beam comprising a main body portion and a support portion, the main body portion extending along the first direction and connected to the first wall, the support portion protruding on a side of the main body portion away from the first wall, and the support portion being provided with a accommodating cavity; the protective beam extending along the first direction, the protective beam being inserted into the accommodating cavity, and in the third direction, there is a gap between the protective beam and the top wall of the accommodating cavity.

[0005] Optionally, the protective member also includes a buffer member, which extends along the first direction and is arranged in the gap between the top wall of the accommodating cavity and the protective beam; the buffer member is inserted into the accommodating cavity, and the buffer member is stacked on the side of the protective beam close to the box body.

[0006] Optionally, the box body further has a third wall and a fourth wall, and the third wall and the fourth wall are relatively arranged on both sides of the box body in the first direction; the support beam also includes a first connecting portion and a second connecting portion, the first connecting portion is arranged at one end of the main body close to the third wall, and the first connecting portion is detachably connected to the third wall, and the second connecting portion is arranged at one end of the main body close to the fourth wall, and the second connecting portion is detachably connected to the fourth wall.

[0007] Optionally, the accommodating cavity passes through the supporting portion along the first direction, and the protective beam is provided through the supporting portion along the first direction.

[0008] Optionally, the battery pack further has a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; the support portion includes a first side plate, a second side plate and a third side plate, the first side plate and the main body portion are arranged opposite to each other along the third direction, and the second side plate and the third side plate are arranged opposite to each other along the second direction; along the second direction, one end of the first side plate is connected to the second side plate, and the other end is connected to the third side plate; along the third direction, the second side plate and the third side plate are respectively connected to the main body portion at one end facing away from the first side plate, so as to The accommodating cavity is defined and the gap is formed between the protective beam and the main body; or, the supporting portion includes a first side panel, a second side panel, a third side panel and a fourth side panel, the first side panel and the fourth side panel are arranged opposite to each other along the third direction, the second side panel and the third side panel are arranged opposite to each other along the second direction, the first side panel, the second side panel, the fourth side panel and the third side panel are connected end to end in sequence to define the accommodating cavity; along the third direction, the fourth side panel is connected to the main body, and the gap is formed between the protective beam and the fourth side panel.

[0009] Optionally, the box body further has a third wall and a fourth wall, and the third wall and the fourth wall are relatively arranged on both sides of the box body in the first direction; the protective member also includes a baffle; the support portion includes a first support portion and a second support portion, the first support portion is arranged at one end of the main body portion close to the third wall, and the second support portion is arranged at one end of the main body portion close to the fourth wall; the baffle is provided on a side of at least one of the first support portion and the second support portion facing away from the other; at least one of the first support portion and the second support portion is detachably connected to the baffle, or the baffle is detachably connected to the main body portion.

[0010] Optionally, the battery pack also has a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; the battery pack also includes a battery cell, a accommodating cavity is provided inside the box body, and the battery cell is arranged in the accommodating cavity, and the battery cell has a first surface and a second surface, the first surface is located on the side of the battery cell away from the protective member, and the second surface is located on the side of the battery cell opposite to the protective member, a terminal is provided on the first surface, and an explosion-proof valve is provided on the second surface; a first through hole is provided on the first wall, which passes through the first wall along the third direction, and the first through hole and the explosion-proof valve are arranged opposite to each other along the third direction; the number of the support beams is at least two, and at least two of the support beams are arranged at intervals along the second direction, and there is a gap between two adjacent support beams, and the gap is connected to the first through hole along the third direction.

[0011] Optionally, the main body has a first end face, which faces the first wall in the third direction; a groove is provided on the first end face at a position opposite to the first through hole in the third direction, and the groove is provided on both sides of the first end face in the second direction, and the grooves of the two adjacent support beams and the gap define an exhaust hole, and the exhaust hole and the first through hole are arranged opposite to each other along the third direction.

[0012] Optionally, the groove includes a groove wall, which faces the adjacent support beam in the second direction, and the groove wall is inclined to form a slope. The groove wall includes a first end and a second end, and the first end and the second end are relatively arranged on both sides of the groove wall in the third direction; along the second direction, in the two groove walls relatively arranged in two adjacent grooves, the spacing between the two first ends is L1 mm, and the spacing between the two second ends is L2 mm, satisfying: L1<L2.

[0013] Optionally, the battery pack further includes a liquid cooling plate and a seal; the liquid cooling plate is arranged in the accommodating cavity, and along the third direction, the liquid cooling plate is overlapped with the first wall, the battery cell is arranged on the side of the liquid cooling plate facing away from the first wall, and a second through hole is provided on the liquid cooling plate that passes through the liquid cooling plate, and the second through hole is arranged opposite to the explosion-proof valve along the third direction; the seal is arranged on the first wall, and the seal covers the first through hole, and the seal is constructed to be able to be broken by the airflow generated by the battery cell under a preset pressure.

[0014] A second aspect of an embodiment of the present application provides an electrical device, comprising the battery pack as described above.

[0015] In summary, the embodiments of the present application provide a battery pack and an electrical device having the battery pack, wherein the battery pack is provided with a protective member on a side of a first wall of a box body away from the second wall along a third direction, the protective member including a support beam and a protective beam, the support beam including a main body portion and a support portion protruding from an end of the main body portion away from the first wall, the support portion being provided with a receiving cavity, the protective beam extending along the first direction, the protective beam being inserted into the receiving cavity, and a gap being provided between the protective beam and the top wall of the receiving cavity in the third direction, so that the protective beam can move along the third direction to approach or move away from the support beam, so that when the side of the box body of the battery pack close to the first wall contacts an obstacle and is impacted, the protective beam first contacts the obstacle, and under the action of the impact force, the protective beam approaches the support beam along the third direction, thereby buffering and absorbing the impact force, thereby reducing the impact force on the box body, and after the impact on the protective beam is weakened or disappears, the protective beam can move away from the support beam along the third direction to absorb and buffer the next impact, thereby effectively improving the safety and service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of a battery pack provided by an embodiment of the present application from a first angle;

[0018] Figure 2 is a schematic structural diagram of the battery pack provided in an embodiment of the present application from a second angle;

[0019] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at point A;

[0020] Figure 4 yes Figure 1 BB cross-sectional view;

[0021] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at C;

[0022] Figure 6 This is an exploded view of the battery pack provided in an embodiment of the present application after removing the battery cells;

[0023] Figure 7 Schematic diagram of the structure of the box in the battery pack provided in the embodiment of the present application;

[0024] Figure 8Schematic diagram of the structure of the protective component in the battery pack provided in the embodiment of the present application;

[0025] Figure 9 yes Figure 8 Exploded diagram;

[0026] Figure 10 This is a schematic diagram of the combined structure of the support beam and the protection beam in the protective member of the battery pack provided in an embodiment of the present application;

[0027] Figure 11 This is a schematic diagram of the combined structure of multiple protective components in the battery pack provided in an embodiment of the present application;

[0028] Figure 12 yes Figure 11 A top view of

[0029] Figure 13 yes Figure 12 A schematic diagram of the enlarged structure at D;

[0030] Figure 14 yes Figure 11 EE cross-sectional view;

[0031] Figure 15 This is another structural schematic diagram of the support portion in the battery pack provided in an embodiment of the present application;

[0032] Figure 16 This is a schematic structural diagram of a liquid cooling plate in a battery pack provided in an embodiment of the present application;

[0033] Figure 17 It is a schematic diagram of the structure of a battery cell in the battery pack provided in an embodiment of the present application.

[0034] Description of main reference numerals:

[0035] 1. Battery pack;

[0036] 10. Box body, 101. Accommodating chamber, 11. First wall, 110. First through hole, 12. Second wall, 121. Opening, 13. Third wall, 14. Fourth wall, 15. Fifth wall, 16. Sixth wall;

[0037] 20. Protective member, 21. Support beam, 210. Main body, 211. Support portion, 211a. First side plate, 211b. Second side plate, 211c. Third side plate, 211d. Fourth side plate, 2110. Accommodating cavity, 2111. First supporting portion, 2112. Second supporting portion, 2113. Third supporting portion, 2120. Connecting hole, 2121. First connecting portion, 2122. Second connecting portion, 213. Gap, 2130. Exhaust hole, 214. First end surface, 2141. Groove, 2142. Groove wall, 2143. First end, 2144. Second end, 215. Second end surface, 22. Protective beam, 220. Gap, 23. Buffer, 24. Baffle, 240. Mounting hole;

[0038] 30. Battery cell, 301. First side, 302. Second side, 303. Third side, 304. Fourth side, 305. Fifth side, 306. Sixth side, 31. Terminal, 32. Explosion-proof valve;

[0039] 40. Liquid cooling plate, 41. Second through hole, 42. Liquid inlet, 43. Liquid outlet;

[0040] 50. Seals;

[0041] 60. Cover plate;

[0042] X, first direction, Y, second direction, Z, third direction. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for the purpose of explaining this application and are not intended to limit this application.

[0044] 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" 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot 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 one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the examples, "parallel" refers to a state where the angle formed between two lines, between a line and a plane, or between two planes is between -1° and 1°. Furthermore, "perpendicular" refers to a state where the angle formed between two lines, between a line and a plane, or between two planes is between 89° and 91°. Equal distances or equal angles refer to a state where the tolerance range is between -1% and 1%.

[0048] In some embodiments of the present application, an electrical device is provided, including a battery pack 1, which serves as a power source for the electrical device. The electrical device may include, but is not limited to, mobile devices (e.g., mobile phones, laptops, etc.), electric vehicles (e.g., pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships, satellites, energy storage systems, etc.

[0049] In some embodiments of the present application, a battery pack 1 is provided, referring to Figures 1 to 15 The battery pack 1 includes a box body 10 and a protective member 20. The battery pack 1 has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other. Figures 1 to 17 In the illustrated embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0050] It should be noted that in the embodiments of the present application, the introduction of the first direction X, the second direction Y, and the third direction Z is merely for the convenience of describing the spatial position relationship and should not be understood as limiting the scope of the embodiments of the present application. Therefore, the perpendicular relationship between the first direction X, the second direction Y, and the third direction Z can be interpreted as the first direction X, the second direction Y, and the third direction Z representing three mutually perpendicular directions in three-dimensional space, respectively, according to the actual technical scenario. It can also be reasonably interpreted as a nearly relatively perpendicular directional relationship between the first direction X, the second direction Y, and the third direction Z, for example, the angles between the first direction X, the second direction Y, and the third direction Z are all within the range of 85° to 95°... As long as it can comply with the spirit of the present application or achieve the technical effects described in the present application, the technical solution can be considered to fall within the scope defined by the attached claims.

[0051] Reference Figures 1 to 7 The box body 10 has a first wall 11 and a second wall 12, and the first wall 11 and the second wall 12 are relatively arranged on both sides of the box body 10 in the third direction Z. The box body 10 also has a third wall 13 and a fourth wall 14, and the third wall 13 and the fourth wall 14 are relatively arranged on both sides of the box body 10 in the first direction X. The box body 10 also has a fifth wall 15 and a sixth wall 16, and the fifth wall 15 and the sixth wall 16 are relatively arranged on both sides of the box body 10 in the second direction Y. The third wall 13, the fifth wall 15, the fourth wall 14 and the sixth wall 16 are sequentially connected end to end to form a shell structure with open ends. The first wall 11 and the second wall 12 respectively cover the open ends to form the box body 10, wherein, specifically as shown in FIG. Figures 1 to 7 In the embodiment shown, the box body 10 is a rectangular parallelepiped structure, the first direction X is parallel to the width direction of the box body 10 , the second direction Y is parallel to the length direction of the box body 10 , and the third direction Z is parallel to the height direction of the box body 10 .

[0052] Reference Figures 1 to 6 as well as Figures 8 to 15 The protective member 20 is provided on the side of the first wall 11 of the box body 10 away from the second wall 12 along the third direction Z. The protective member 20 includes a support beam 21 and a protective beam 22. Figure 3 、 Figure 5 as well as Figures 8 to 15 The support beam 21 includes a main body portion 210 and a support portion 211. The main body portion 210 extends along the first direction X. Figure 3 as well as Figure 5 , the main body 210 is connected to the first wall 11, refer to Figure 3 、 Figure 5 、 Figures 8 to 10 as well as Figure 15 The support portion 211 is protruding from the side of the main body 210 away from the first wall 11, referring to Figure 9 , the support portion 211 is provided with a receiving cavity 2110, referring to Figure 1 、 Figure 3 、 Figure 5 、 Figures 8 to 11 as well as Figures 14-15 The protection beam 22 extends along the first direction X, and the protection beam 22 is inserted into the accommodating cavity 2110. Figure 10 In the third direction Z, there is a gap 220 between the protection beam 22 and the top wall of the accommodating cavity 2110.

[0053] In traditional battery packs, the protection of the bottom of the box is relatively simple, and most of the time only the bottom guard plate is used as the bottom protection of the box. When the bottom of the battery pack is bumped or hit, the bottom guard plate is at risk of breaking, which in turn causes the liquid cooling plate inside the box to break, resulting in the risk of internal heat transfer fluid leakage, and causing safety hazards such as short circuits in the battery cells and electrical components inside the box, affecting the safety and service life of the battery pack. In addition, the integrated structural design between the bottom guard plate and the box means that the entire battery pack needs to be replaced after the bottom guard plate breaks, which leads to high maintenance costs.

[0054] The battery pack 1 provided in the embodiment of the present application is provided with a protective member 20 on the side of the first wall 11 of the box body 10 away from the second wall 12 along the third direction Z. The protective member 20 includes a support beam 21 and a protective beam 22. The support beam 21 includes a main body 210 and a support portion 211. The main body 210 extends along the first direction X and is connected to the first wall 11, so that the protective member 20 is installed on the first wall 11 of the box body 10 through the support beam 21. The support portion 211 protrudes and is provided on the side of the main body 210 away from the first wall 11. The support portion 211 is provided with a accommodating cavity 21. 10, the protective beam 22 extends along the first direction X, the protective beam 22 is inserted into the accommodating cavity 2110, and in the third direction Z, there is a gap 220 between the protective beam 22 and the top wall of the accommodating cavity 2110, so that the protective beam 22 is installed on the side of the support beam 21 away from the first wall 11 of the box body 10 along the third direction Z through the support portion 211, and the protective beam 22 can move along the third direction Z to approach or move away from the main body 210 of the support beam 21, so that the side of the box body 10 of the battery pack 1 close to the first wall 11 contacts the obstacle and is impacted. That is, when the bottom of the box body 10 is bumped or hit along the third direction Z, the protective beam 22 first contacts the obstacle, and the obstacle impacts the protective beam 22 to generate an impact force. Under the action of the impact force, the protective beam 22 approaches the main body 210 of the support beam 21 along the third direction Z, so that the protective beam 22 forms a buffer and absorption of the impact force, so as to absorb part of the energy generated by the impact force, thereby reducing the impact force received by the box body 10. In addition, the design of the support beam 21 allows the protective beam 22 to be closer to the support beam 21 along the third direction Z. It abuts against the main body 210 of the support beam 21, thereby forming secondary protection for the battery pack 1 box 10, so as to further reduce the impact force on the box 10, form effective protection for the box 10, and then form protection for the entire battery pack 1. After the impact force on the protection beam 22 is weakened or disappears, for example, the obstacle is separated from the protection beam 22, the protection beam 22 can rely on its own weight to move away from the main body 210 of the support beam 21 along the third direction Z to cushion and absorb the next impact, thereby effectively improving the safety and service life of the battery pack 1.

[0055] In some embodiments, reference Figure 1 、 Figure 3 、 Figure 5 、 Figures 8 and 9 as well as Figure 11 and Figure 14 The protective member 20 also includes a buffer member 23, which extends along the first direction X. The buffer member 23 is arranged in the gap 220 between the top wall of the accommodating cavity 2110 and the protective beam 22. The buffer member 23 is inserted into the accommodating cavity 2110, and the buffer member 23 is stacked on the side of the protective beam 22 close to the box body 10.

[0056] In some embodiments, one end of the buffer 23 along the third direction Z abuts against the support beam 21, and the other end of the buffer 23 abuts against the protective beam 22. The protective beam 22 approaches the support beam 21 along the third direction Z, and the buffer 23 forms a buffer for the protective beam 22. The design of the buffer 23 and the structural design in which the buffer 23 abuts against both the support beam 21 and the protective beam 22 enable the box 10 of the battery pack 1 to be impacted by contact with an obstacle on the side close to the first wall 11. Under the action of the impact force, the protective beam 22 approaches the support beam 21, and the protective beam 22 abuts against the buffer 23. The buffer 23 forms a buffer for the protective beam 22. Combined with the movement of the protective beam 22 along the third direction Z close to the support beam 21, double buffering and energy absorption of the impact force on the protective beam 22 can be formed, thereby effectively improving the overall protection of the battery pack 1. Moreover, the structural design of the buffer member 23 between the support beam 21 and the protective beam 22 can prevent the protective beam 22 from being damaged due to direct contact with the support beam 21, thereby improving the service life of the support beam 21 and the protective beam 22, so that the protective member 20 can provide long-term protection for the battery pack 1.

[0057] In some embodiments, one end of the buffer 23 along the third direction Z abuts against the support beam 21, and the other end of the buffer 23 along the third direction Z is spaced apart from the protective beam 22. The structural design of the spacing between the protective beam 22 and the buffer 23 can provide the protective beam 22 with movement space along the third direction Z. When the protective beam 22 contacts an obstacle, the protective beam 22 first moves a certain distance in the gap and then abuts against the buffer 23, so that the protective beam 22 first absorbs part of the energy generated by the impact force, and then abuts against the buffer 23 to further absorb the energy generated by the impact force. This can reduce the impact of the protective beam 22 on the buffer 23 to a certain extent, improve the service life of the buffer 23, and achieve long-term protection of the battery pack 1 by the protective member 20.

[0058] In some embodiments, the buffer member 23 is a foam or an elastic member, and the elastic member is selected from one of rubber and a spring.

[0059] In some embodiments, reference Figure 3 、 Figures 8 to 12 as well as Figures 14-15The support beam 21 further includes a first connection portion 2121 and a second connection portion 2122. The first connection portion 2121 is disposed at one end of the main body 210 near the third wall 13 of the box body 10, and the first connection portion 2121 is detachably connected to the third wall 13. The second connection portion 2122 is disposed at one end of the main body 210 near the fourth wall 14 of the box body 10, and the second connection portion 2122 is detachably connected to the fourth wall 14. The provision of the first connection portion 2121 and the second connection portion 2122 enables a detachable connection to be formed between the main body 210 of the support beam 21 and the box body 10. When one or more of the protective beam 22, the buffer member 23, and the support beam 21 are damaged, the protective member 20 can be completely removed from the box body 10, and subsequent replacement is facilitated, thereby ensuring the protective effect of the protective member 20 on the battery pack 1.

[0060] In some embodiments, the first connection portion 2121 and the second connection portion 2122 extend along the third direction Z respectively, one end of the first connection portion 2121 is connected to the main body 210, and the other end is connected to the third wall 13 of the box body 10, and one end of the second connection portion 2122 is connected to the main body 210, and the other end is connected to the fourth wall 14 of the box body 10. Figures 8 and 9 as well as Figures 14-15 The first connecting portion 2121 is provided with a connecting hole 2120 that passes through the first connecting portion 2121 along its thickness direction. A bolt is inserted into the connecting hole 2120 to achieve a detachable connection between the first connecting portion 2121 and the third wall 13 of the box body 10. The second connecting portion 2122 is provided with a connecting hole 2120 that passes through the second connecting portion 2122 along its thickness direction. A bolt is inserted into the connecting hole 2120 to achieve a detachable connection between the second connecting portion 2122 and the fourth wall 14 of the box body 10.

[0061] In some embodiments, the accommodating cavity 2110 penetrates the support portion 211 along the first direction X, and the protective beam 22 is provided through the support portion 211 along the first direction X. The structural design of the accommodating cavity 2110 penetrating the support portion 211 makes it easy to separate the protective beam 22 from the protective member 20 when the protective beam 22 is damaged by repeated impacts, thereby facilitating replacement and ensuring the protective effect of the protective member 20.

[0062] In some embodiments, reference Figure 14The support portion 211 includes a first side plate 211a, a second side plate 211b, and a third side plate 211c. The first side plate 211a is arranged opposite to the main body 210 along the third direction Z, and the second side plate 211b and the third side plate 211c are arranged opposite to each other along the second direction Y. Along the second direction Y, one end of the first side plate 211a is connected to the second side plate 211b, and the other end of the first side plate 211a is connected to the third side plate 211c. Along the third direction Z, the ends of the second side plate 211b and the third side plate 211c facing away from the first side plate 211a are respectively connected to the main body 210, so that the first side plate 211a, the second side plate 211b, the third side plate 211c, and the main body 210 define a receiving cavity 2110, and the cross-section of the support portion 211 is U-shaped or concave-shaped. The protective beam 22 is inserted into the receiving cavity 2110.

[0063] Along the third direction Z, the protective beam 22 overlaps the first side panel 211a. The side of the main body 210 facing the first side panel 211a forms the top wall of the accommodating cavity 2110, and a gap 220 is formed between the protective beam 22 and the main body 210. The protective beam 22, inserted into the accommodating cavity 2110, is mounted via the support portion 211 to the side of the main body 210 facing away from the case 10 along the third direction Z. The protective beam 22 is movable along the third direction Z to move closer to or further away from the main body 210, providing a buffering and absorption function, effectively improving the safety and service life of the battery pack 1.

[0064] In some embodiments, reference Figure 15 The support portion 211 includes a first side plate 211a, a second side plate 211b, a third side plate 211c and a fourth side plate 211d. The first side plate 211a and the fourth side plate 211d are arranged relatively to each other along the third direction Z, and the second side plate 211b and the third side plate 211c are arranged relatively to each other along the second direction Y. The first side plate 211a, the second side plate 211b, the fourth side plate 211d and the third side plate 211c are connected end to end in sequence to define a accommodating cavity 2110, and make the cross-section of the support portion 211 present a U-shaped shape.

[0065] Along the third direction Z, the protective beam 22 overlaps the first side panel 211a, and the fourth side panel 211d is connected to the main body 210. The side of the fourth side panel 211d facing the first side panel 211a forms the top wall of the accommodating cavity 2110, and a gap 220 is formed between the protective beam 22 and the fourth side panel 211d. The protective beam 22, inserted into the accommodating cavity 2110, is mounted via the support portion 211 to the side of the fourth side panel 211d of the main body facing away from the box body 10 along the third direction Z. The protective beam 22 can move along the third direction Z to move closer to or further away from the fourth side panel 211d, providing a buffering and absorption function, effectively improving the safety and service life of the battery pack 1.

[0066] In some embodiments, reference Figure 3 as well as Figures 8 to 11 The support portion 211 further includes a third support portion 2113, which is disposed between the first support portion 2111 and the second support portion 2112 along the first direction X. The third support portion 2113 is provided with a receiving cavity 2110, and the protection beam 22 is disposed in the receiving cavity 2110 of the third support portion 2113. The provision of the third support portion 2113 enables the third support portion 2113 to cooperate with the first support portion 2111 and the second support portion 2112 to jointly support the protection beam 22, thereby improving the supporting effect and supporting stability of the protection beam 22, thereby increasing the strength of the protection beam 22 in the first direction X and ensuring the protective effect of the protection beam 22.

[0067] In some embodiments, a protective member 20 is provided with a protective beam 22 , and the protective beam 22 is sequentially provided along the first direction X through the first support portion 2111 , the third support portion 2113 , and the second support portion 2112 .

[0068] In some embodiments, two protection beams 22 are provided in a protection member 20 , one protection beam 22 is provided through the first support portion 2111 and the third support portion 2113 , and the other protection beam 22 is provided through the third support portion 2113 and the second support portion 2112 .

[0069] In some embodiments, a buffer member 23 is provided in a protective member 20 , and the buffer member 23 is sequentially provided along the first direction X through the first support portion 2111 , the third support portion 2113 , and the second support portion 2112 .

[0070] In some embodiments, two buffer members 23 are provided in a protective member 20 , one buffer member 23 is provided through the first support portion 2111 and the third support portion 2113 , and the other buffer member 23 is provided through the third support portion 2113 and the second support portion 2112 .

[0071] In some embodiments, reference Figure 3 、 Figures 8 to 11 , the protective member 20 further includes a baffle 24, referring to Figures 2 and 3 、 Figures 8 to 11The support portion 211 includes a first support portion 2111 and a second support portion 2112. The first support portion 2111 is disposed at one end of the body portion 210 near the third wall 13 of the box body 10, and the second support portion 2112 is disposed at one end of the body portion 210 near the fourth wall 14 of the box body 10. A baffle 24 is disposed on a side of at least one of the first support portion 2111 and the second support portion 2112 facing away from the other. The first support portion 2111 and the second support portion 2112 are each provided with an accommodating cavity 2110. At least one of the first support portion 2111 and the second support portion 2112 is detachably connected to the baffle 24. The baffle 24 serves as a stop for the protective beam 22 inserted into the accommodating cavity 2110. The design of the baffle 24 can form a stop for the protective beam 22 along the first direction X, so as to prevent the protective beam 22 from moving along the first direction X and detaching from the support part 211 when approaching or moving away from the support beam 21 along the third direction Z, thereby ensuring that the protective beam 22 can only move along the third direction Z, and ensuring that the protective beam 22 buffers and absorbs the impact force generated by obstacles.

[0072] In some embodiments, a baffle 24 is provided on a side of the first supporting portion 2111 facing away from the second supporting portion 2112 .

[0073] In some embodiments, a baffle 24 is provided on a side of the second supporting portion 2112 facing away from the first supporting portion 2111 .

[0074] In some embodiments, the baffle 24 is detachably connected to the first support portion 2111, allowing the protective beam 22 to be separated from the first support portion 2111. The detachable connection between the baffle 24 and the first support portion 2111 allows the protective beam 22 to be removed from the first support portion 2111 when damaged, facilitating repair or replacement of the protective beam 22. This ensures that the protective beam 22 can buffer and absorb the impact force generated by obstacles.

[0075] In some embodiments, the baffle 24 is detachably connected to the second support portion 2112, allowing the protective beam 22 to be separated from the second support portion 2112. The detachable connection between the baffle 24 and the second support portion 2112 allows the protective beam 22 to be removed from the second support portion 2112 when damaged, facilitating repair or replacement of the protective beam 22. This ensures that the protective beam 22 can buffer and absorb the impact force generated by obstacles.

[0076] In some embodiments, the baffle 24 is detachably connected to the main body 210 of the support beam 21 , so that the protection beam 22 can be separated from the support portion 211 .

[0077] In some embodiments, reference Figure 9A mounting hole 240 is provided on the baffle 24 arranged on the side of the first support portion 2111 away from the second support portion 2112, and a bolt is inserted into the mounting hole 240, so that a detachable connection is formed between the baffle 24 and the first support portion 2111 or the main body 210 of the support beam 21.

[0078] In some embodiments, a mounting hole 240 is provided on the baffle 24 disposed on the side of the second support portion 2112 away from the first support portion 2111, and a bolt is inserted into the mounting hole 240 to form a detachable connection between the baffle 24 and the second support portion 2112 or the main body 210 of the support beam 21.

[0079] In some embodiments, reference Figures 4 and 5 as well as Figure 17 The battery pack 1 also includes a battery cell 30, referring to Figure 4 and Figure 7 The box body 10 is provided with a receiving cavity 101 inside, and the battery cell 30 is arranged in the receiving cavity 101. Figure 17 The battery cell 30 has a first surface 301 and a second surface 302. The first surface 301 is located on the side of the battery cell 30 away from the protective member 20. Figure 5 , the second surface 302 is located on the side of the battery cell 30 opposite to the protective member 20. The battery cell 30 also has a third surface 303 and a fourth surface 304. The third surface 303 is located on the side of the battery cell 30 opposite to the fifth wall 15 of the case 10, and the fourth surface 304 is located on the side of the battery cell 30 opposite to the sixth wall 16 of the case 10. The battery cell 30 also has a fifth surface 305 and a sixth surface 306. The fifth surface 305 is located on the side of the battery cell 30 opposite to the third wall 13 of the case 10, and the sixth surface 306 is located on the side of the battery cell 30 opposite to the fourth wall 14 of the case 10. The third surface 303, the fifth surface 305, the fourth surface 304 and the sixth surface 306 are connected end to end in sequence to form a shell structure with open ends. The first surface 301 and the second surface 302 respectively cover the open ends to form a closed hexahedron. The fifth surface 305 and the sixth surface 306 are the surfaces with the largest surface areas among the six surfaces. Refer to Figure 17 The first surface 301 of the battery cell 30 is provided with a terminal 31, and the second surface 302 is provided with an explosion-proof valve 32. Figures 6 and 7 The first wall 11 is provided with a first through hole 110 that passes through the first wall 11 along the third direction Z. The first through hole 110 and the explosion-proof valve 32 are arranged opposite to each other along the third direction Z. Figures 1 and 2 、 Figures 4 to 6 as well as Figures 11 to 15 The number of support beams 21 is at least two, and at least two support beams 21 are spaced apart along the second direction Y. There is a gap 213 between two adjacent support beams 21, and the gap 213 is connected to the first through hole 110 along the third direction Z. Figures 1 and 2 、 Figures 4 to 6 as well as Figures 11 to 15 In the embodiment shown, there are multiple support beams 21, which are arranged at intervals along the second direction Y, so that multiple protection beams 22 cooperate to form protection for the battery pack 1, increase the protection area of ​​the battery pack 1 on the side adjacent to the first wall 11, and ensure the protection effect of the battery pack 1.

[0080] The structural design of the battery cells 30, with the terminals 31 disposed on the first surface 301 and the explosion-proof valve 32 disposed on the second surface 302, achieves thermal and electrical separation of the battery cells 30. Specifically, the terminals 31 for electrical connection to electrical components and the explosion-proof valve 32, used to vent internal gas from the battery cells 30 in the event of thermal runaway, are disposed on opposing sides of the battery cells 30 along the third direction Z, ensuring the safety of the battery cells 30. Furthermore, the first through-holes 110 on the first wall 11 of the housing 10, combined with the explosion-proof valve 32 and the first through-hole 110 positioned opposite each other along the third direction Z, and the gap 213 between two adjacent support beams 21 communicating with the first through-hole 110 along the third direction Z, form an exhaust passageway between the first through-hole 110 and the gap 213, located opposite the explosion-proof valve 32. This allows the thermal runaway gas generated by the battery cells 30 in the event of thermal runaway to be smoothly discharged outside the housing 10, thus ensuring the safety of the battery pack 1.

[0081] In some embodiments, reference Figure 4 and Figure 5 , a plurality of battery cells 30 are provided inside the box body 10, and the plurality of battery cells 30 are spaced apart along the second direction Y, referring to Figure 6 and Figure 7 The first through hole 110 is a strip-shaped hole extending along the second direction Y. The explosion-proof valve 32 on each of the multiple battery cells 30 spaced apart along the second direction Y is positioned opposite the first through hole 110 along the third direction Z, thereby ensuring stable discharge of thermal runaway gases. In other implementations, each explosion-proof valve 32 is positioned opposite a first through hole 110 along the third direction Z, or one first through hole 110 is positioned opposite at least one explosion-proof valve 32 along the third direction Z. The specific arrangement can be selected based on actual usage requirements.

[0082] In some embodiments, reference Figures 8 to 15 The main body 210 of the support beam 21 has a first end surface 214, and the first end surface 214 faces the first wall 11 in the third direction Z. Figure 5 、 Figures 8 to 15 A groove 2141 is provided on the first end surface 214 at a position opposite to the first through hole 110 in the third direction Z. The groove 2141 is provided on both sides of the first end surface 214 in the second direction Y. Figure 5as well as Figures 12 to 14 The grooves 2141 of the two adjacent support beams 21 along the second direction Y and the gap 213 define an exhaust hole 2130, referring to Figure 5 The exhaust hole 2130 is arranged opposite to the first through hole 110 along the third direction Z. The structural design of the groove 2141 provided on the main body 210 of the support beam 21 allows the two grooves 2141 at adjacent ends of two adjacent support beams 21 to cooperate with the gap 213 between the two adjacent support beams 21 to form the exhaust hole 2130. The cooperation of the two grooves 2141 guides and restricts the thermal runaway gas discharged through the first through hole 110, thereby ensuring that the thermal runaway gas can smoothly and stably enter the exhaust hole 2130 and be discharged, thereby ensuring the safety of the battery pack 1.

[0083] In some embodiments, reference Figure 5 、 Figures 8 and 9 as well as Figures 13 to 15 The groove 2141 includes a groove wall 2142, the groove wall 2142 is oriented toward the adjacent support beam 21 in the second direction Y, and the groove wall 2142 is inclined to form a slope. Figure 9 and Figure 12 The groove wall 2142 includes a first end 2143 and a second end 2144. The first end 2143 and the second end 2144 are relatively arranged on both sides of the groove wall 2142 in the third direction Z. Figure 13 Along the second direction Y, the spacing between the two opposing groove walls 2142 in two adjacent grooves 2141 is L1 mm, and the spacing between the two second ends 2144 is L2 mm, satisfying the following: L1 < L2. The groove walls 2142 are inclined to form a sloped structure, and the spacing L1 between the two first ends 2143 is less than the spacing L2 between the two second ends 2144. This creates a "funnel-shaped" structure between two adjacent groove walls 2142 along the second direction Y, decreasing from the end closest to the first wall 11 to the end further away from the first wall 11 along the third direction Z. This allows the thermal runaway gas entering the exhaust hole 2130 through the first through hole 110 to form a jet, allowing the thermal runaway gas to quickly enter the exhaust hole 2130 and be quickly discharged outside the housing 10, thereby ensuring the safety and service life of the battery pack 1.

[0084] In some embodiments, reference Figures 4 to 6 as well as Figure 16 The battery pack 1 further includes a liquid cooling plate 40, which is disposed in the accommodating cavity 101. Figure 5 , along the third direction Z, the liquid cooling plate 40 overlaps the first wall 11 of the box body 10, and the battery cell 30 is arranged on the side of the liquid cooling plate 40 away from the first wall 11, referring to Figures 4 to 6 as well as Figure 16The liquid cooling plate 40 is provided with a second through hole 41 that passes through the liquid cooling plate 40 along the third direction Z. Figure 5 The second through hole 41 and the explosion-proof valve 32 are arranged opposite to each other along the third direction Z. Figures 5 and 6 The battery pack 1 further includes a seal 50, referring to Figure 5 The sealing member 50 is provided on the first wall 11 and covers the first through hole 110 . The sealing member 50 is configured to be broken by the airflow generated by the battery cell 30 under a preset pressure.

[0085] The provision of the liquid cooling plate 40, with the battery cells 30 positioned on the side of the liquid cooling plate 40 facing away from the first wall 11, allows the liquid cooling plate 40 to control the temperature of the battery cells 30, maintaining a suitable operating temperature. The provision of the second through-hole 41, which communicates with the first through-hole 110 along the third direction Z and is positioned opposite the explosion-proof valve 32, ensures that thermal runaway gases discharged from the explosion-proof valve 32 can be smoothly discharged outside the housing 10. The structural design of the seal 50, which is configured to be ruptured by the airflow generated by the battery cells 30 at a preset pressure, ensures the sealing of the housing 10 while allowing thermal runaway gases from the battery cells 30 to be smoothly discharged outside the housing 10 through the second through-hole 41, the first through-hole 110, and the vent 2130, in the event of thermal runaway. This ensures the safety and service life of the battery pack 1.

[0086] In some embodiments, reference Figure 4 、 Figure 6 as well as Figure 16 A liquid inlet 42 and a liquid outlet 43 are provided on the liquid cooling plate 40. A flow channel (not shown in the figure) for the flow of heat-conducting fluid is provided inside the liquid cooling plate 40. The liquid inlet 42 and the liquid outlet 43 are respectively connected to the flow channel.

[0087] In some embodiments, reference Figure 1 、 Figures 3 and 4 as well as Figure 6 The battery pack 1 also includes a cover plate 60, referring to Figure 4 as well as Figures 6 and 7 The second wall 12 is provided with an opening 121 communicating with the accommodating chamber 101 , and the cover plate 60 covers the opening 121 to form a seal for the accommodating chamber 101 inside the box body 10 .

[0088] The above is a detailed introduction to the technical solutions provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack having a first direction and a third direction perpendicular to each other, characterized in that: The battery pack includes: A box body, the box body having a first wall and a second wall, the first wall and the second wall being arranged opposite to each other on two sides of the box body in the third direction; a protective member, provided on a side of the first wall away from the second wall along the third direction, the protective member comprising a support beam and a protective beam; The support beam includes a main body portion and a support portion, wherein the main body portion extends along the first direction and is connected to the first wall, and the support portion is protrudingly arranged on a side of the main body portion away from the first wall, and the support portion is provided with an accommodating cavity; The protection beam extends along the first direction, is inserted into the accommodating cavity, and in the third direction, a gap is formed between the protection beam and a top wall of the accommodating cavity.

2. The battery pack according to claim 1, wherein: The protective member further includes a buffer member, the buffer member extending along the first direction, the buffer member being disposed in a gap between a top wall of the accommodating cavity and the protective beam; The buffer member is inserted into the accommodating cavity, and the buffer member is stacked and arranged on a side of the protection beam close to the box body.

3. The battery pack according to claim 1, wherein: The box body further comprises a third wall and a fourth wall, wherein the third wall and the fourth wall are arranged oppositely on two sides of the box body in the first direction; The support beam also includes a first connecting portion and a second connecting portion, the first connecting portion is arranged at one end of the main body close to the third wall, and the first connecting portion is detachably connected to the third wall, and the second connecting portion is arranged at one end of the main body close to the fourth wall, and the second connecting portion is detachably connected to the fourth wall.

4. The battery pack according to claim 1, wherein: The accommodating cavity passes through the supporting portion along the first direction, and the protective beam is disposed through the supporting portion along the first direction.

5. The battery pack according to claim 4, wherein: The battery pack further has a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; The support portion includes a first side plate, a second side plate, and a third side plate, the first side plate and the main body portion are arranged opposite to each other along the third direction, and the second side plate and the third side plate are arranged opposite to each other along the second direction; along the second direction, one end of the first side plate is connected to the second side plate, and the other end is connected to the third side plate; along the third direction, one end of the second side plate and the third side plate facing away from the first side plate are respectively connected to the main body portion to define the accommodating cavity, and the gap is formed between the protective beam and the main body portion; Alternatively, the supporting portion includes a first side panel, a second side panel, a third side panel and a fourth side panel, the first side panel and the fourth side panel are arranged opposite to each other along the third direction, the second side panel and the third side panel are arranged opposite to each other along the second direction, the first side panel, the second side panel, the fourth side panel and the third side panel are connected end to end in sequence to define the accommodating cavity; along the third direction, the fourth side panel is connected to the main body portion, and the gap is formed between the protective beam and the fourth side panel.

6. The battery pack according to claim 5, wherein: The box body further comprises a third wall and a fourth wall, wherein the third wall and the fourth wall are arranged oppositely on two sides of the box body in the first direction; The protective member further includes a baffle; The support portion includes a first support portion and a second support portion, the first support portion is provided at one end of the main body portion close to the third wall, and the second support portion is provided at one end of the main body portion close to the fourth wall; The baffle is provided on a side of at least one of the first supporting portion and the second supporting portion facing away from the other; At least one of the first supporting portion and the second supporting portion is detachably connected to the baffle, or the baffle is detachably connected to the main body.

7. The battery pack according to claim 1, wherein: The battery pack further has a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; The battery pack further includes a battery cell. The box body is provided with a receiving cavity, and the battery cell is disposed in the receiving cavity. The battery cell has a first surface and a second surface, the first surface being located on a side of the battery cell facing away from the protective member, and the second surface being located on a side of the battery cell opposite to the protective member. The first surface is provided with a terminal, and the second surface is provided with an explosion-proof valve. A first through hole is formed on the first wall and passes through the first wall along the third direction, and the first through hole is arranged opposite to the explosion-proof valve along the third direction; There are at least two support beams, and at least two support beams are spaced apart along the second direction. There is a gap between two adjacent support beams, and the gap is connected to the first through hole along the third direction.

8. The battery pack according to claim 7, wherein: The main body has a first end surface, and the first end surface faces the first wall in the third direction; A groove is provided on the first end surface at a position opposite to the first through hole in the third direction, and the groove is provided on both sides of the first end surface in the second direction. The grooves of the two adjacent support beams and the gap define an exhaust hole, and the exhaust hole and the first through hole are arranged opposite to each other along the third direction.

9. The battery pack according to claim 8, wherein: The groove includes a groove wall, the groove wall facing the adjacent support beam in the second direction, the groove wall being inclined to form a slope, the groove wall including a first end and a second end, the first end and the second end being oppositely arranged on two sides of the groove wall in the third direction; Along the second direction, in two adjacent groove walls arranged opposite to each other, the distance between the two first ends is L1 mm, and the distance between the two second ends is L2 mm, satisfying: L1<L2.

10. The battery pack according to claim 7, wherein: The battery pack also includes a liquid cooling plate and a seal; The liquid cooling plate is disposed in the accommodating cavity, and is superposed on the first wall along the third direction. The battery cell is disposed on a side of the liquid cooling plate facing away from the first wall. A second through hole is formed on the liquid cooling plate, penetrating the liquid cooling plate. The second through hole is disposed opposite to the explosion-proof valve along the third direction. The sealing member is disposed on the first wall and covers the first through hole. The sealing member is configured to be broken by the airflow generated by the battery cell under a preset pressure.

11. An electrical device, characterized in that: The invention comprises the battery pack according to any one of claims 1 to 10.

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