Battery pack and electric device

Abstract

A battery pack comprising: a top cover (11), a frame (12) and a bottom plate (13), which jointly define an accommodating space (120), wherein the top cover (11) and the bottom plate (13) are respectively connected to two sides of the frame (12) in a first direction (Z); supports (30), which each comprise a main body portion (31) and a support portion (32), wherein the main body portion (31) is connected to the top cover (11) and the bottom plate (13) respectively, the support portion (32) is connected to the side of the main body portion (31) facing the bottom plate (13) and is also connected to the bottom plate (13), and the support portion (32) has a first plate surface (321) facing away from the bottom plate (13); a buffer layer (40), which is provided in the accommodating space (120) and is connected to the first plate surface (321); and battery cells (20), which each comprise a shell (21), wherein the shell (21) has a first side portion (211) facing the bottom plate (13), and the first side portion (211) is connected to the side of the buffer layer (40) facing the top cover (11). In a second direction (X), the size of the main body portion (31) is smaller than that of the support portion (32).

Description

Battery pack and electric device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202421574856.5, entitled "Battery pack and electric device", filed on July 04, 2024 with the China Patent Office, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery, in particular to a battery pack and an electric device. BACKGROUND

[0004] In recent years, the emergence of new energy vehicles has played a huge role in social development and environmental protection. As a rechargeable battery, the power battery is the power source of new energy vehicles and is widely used in the field of new energy vehicles. In some cases, the existing battery has poor rigidity and cannot directly bear the load from other parts of the electric device, which can easily cause safety accidents and affect the safety of the electric device.

[0005] For example, the existing battery pack usually includes a box body for forming an accommodation space, and a single battery is arranged in the accommodation space. When the bottom of the box body collides with an obstacle, the external force generated by the collision can cause the bottom of the battery box to deform. The upward deformation of the bottom of the box body can impact or press the single battery. Therefore, when the battery box is deformed by the impact from below, the battery box can contact the single battery and cause damage to the single battery, resulting in battery failure and affecting the safety of the electric device. SUMMARY

[0006] The present application provides a battery pack and an electric device, which can solve the problem that the existing battery box bottom can contact the single battery and cause damage to the single battery when the battery box bottom collides.

[0007] To achieve the above purpose, the battery pack provided by the present application has a first direction Z and a second direction X intersecting with each other, and the battery pack comprises:

[0008] A box body comprising a top cover, a frame and a bottom plate, the top cover and the bottom plate being connected to two sides of the frame in the first direction respectively to jointly define an accommodation space;

[0009] A support arranged in the accommodation space, the support comprising a main body portion and a support portion, the main body portion being supported between the top cover and the bottom plate and being connected to the top cover and the bottom plate respectively, the support portion being connected to one side of the main body portion facing the bottom plate and being connected to the bottom plate, the support portion having a first plate surface facing away from the bottom plate;

[0010] a buffer layer disposed in the accommodation space and connected to the first plate surface;

[0011] a single battery disposed in the accommodation space, the single battery comprising a shell having a first side facing the bottom plate, the first side being connected to a side of the buffer layer facing the top cover;

[0012] The size D1mm of the main body portion of the bracket in the second direction is less than the size D2mm of the support portion of the bracket in the second direction.

[0013] In the technical solution, the main body portion of the bracket is supported between the top cover and the bottom plate and connected to the top cover and the bottom plate respectively, the support portion of the bracket is connected to the first side of the single battery through the buffer layer, so that when the bottom plate collides with an obstacle and deforms, part of the collision force is transmitted to the top cover through the main body portion, and the other part is transmitted to the buffer layer through the support portion, the buffer layer can reduce the collision force transmitted to the single battery, and the above-mentioned processing scheme of the collision force can reduce the probability that the single battery collides with the bottom plate and is damaged, thereby reducing the probability that the battery is disabled. Moreover, the size D1mm of the main body portion of the bracket in the second direction is less than the size D2mm of the support portion of the bracket in the second direction X, so that the buffer layer can bear more collision force and prevent the bottom plate of the battery pack from being broken by excessive collision force.

[0014] In some embodiments of the present application, the buffer layer is disposed on the top of the first plate surface, and the single battery is supported on the buffer layer so that the first side is spaced apart from the bottom plate.

[0015] In some embodiments of the present application, the side of the main body portion opposite to the support portion is directly connected to the top cover.

[0016] In some embodiments of the present application, the shell has a second side facing the top cover, and the bracket further comprises a connecting portion connected to at least one side of the main body portion in the second direction X, the connecting portion being located between the second side and the top cover and in contact with the second side.

[0017] In some embodiments of the present application, in the first direction Z, the first side and the support portion have a first gap therebetween, and the buffer layer is located in the first gap.

[0018] In some embodiments of the present application, the size H1mm of the first gap in the first direction Z satisfies: 0.2≤H1≤10.

[0019] In some embodiments of the present application, in the first direction Z, the bottom plate and the first side portion have a second gap, the size of the second gap in the first direction Z is H2 mm, and satisfies: 3≤H2≤35, and H2>H1.

[0020] In some embodiments of the present application, in the second direction X, the size of the main body portion is D1 mm, and satisfies: 0.5≤D1≤30.

[0021] In some embodiments of the present application, the first side portion is provided with a pole column, the pole column is located on one side of the support portion, so that the pole column is staggered with the buffer layer and the support portion in the second direction X.

[0022] In some embodiments of the present application, in the first direction Z, the size of the buffer layer is greater than the size of the pole column protruding from the first side portion.

[0023] In some embodiments of the present application, the battery pack further has a third direction Y, the first direction Z, the second direction X and the third direction Y are perpendicular to each other;

[0024] The shell comprises two side walls 213 extending along the third direction Y and arranged oppositely, the first side portion is provided with two pole columns, in the second direction X, the size of the part of the support portion supported on the buffer layer is D2 mm, the size between the two side walls and the pole columns close to them respectively is D3 mm, and satisfies: D2=(0.25-1)D3.

[0025] In some embodiments of the present application, in the second direction X, the size of the single battery is L mm, the size of the connecting portion in the second direction X is D4 mm, and satisfies: 0<D4≤L / 2.

[0026] In some embodiments of the present application, the support has a plurality of supports, the plurality of supports are arranged in sequence along the second direction X, the single battery is arranged between two adjacent supports, and the single battery is supported by the buffer layer of two adjacent supports.

[0027] In some embodiments of the present application, the support has a plurality of supports, the plurality of supports are arranged in sequence along the second direction X, the single battery is arranged between two adjacent supports, and at least one support supports two single batteries adjacent in the second direction X.

[0028] In some embodiments of the present application, the battery pack further has a third direction Y, the first direction Z, the second direction X and the third direction Y are perpendicular to each other, a plurality of the single batteries are arranged along the third direction Y, and at least one of the supports supports a plurality of the single batteries arranged along the third direction.

[0029] In some embodiments of the present application, the plurality of supports are sequentially and spacedly arranged in the accommodating space.

[0030] The two supports at the two ends are in the shape of "L", and the support portion is arranged on one side of the main body portion.

[0031] The support portion is arranged on both sides of the main body portion.

[0032] The plurality of buffer layers are arranged one-to-one corresponding to the support portions.

[0033] The single battery is arranged between the two adjacent supports, and the two ends of the single battery are supported by the buffer layers of the two adjacent supports.

[0034] In some embodiments of the present application, the plurality of supports are sequentially and spacedly arranged in the accommodating space.

[0035] The two supports at the two ends are in the shape of "L", and the support portion and the connecting portion are arranged on the same side of the main body portion.

[0036] The support portion and the connecting portion are arranged on both sides of the main body portion.

[0037] The plurality of buffer layers are arranged one-to-one corresponding to the support portions.

[0038] The single battery is arranged between the two adjacent supports, and the two ends of the single battery are supported by the buffer layers of the two adjacent supports.

[0039] In some embodiments of the present application, the battery pack further comprises:

[0040] The cooling assembly is arranged on the side of the top cover facing the bottom plate, and / or on the side of the main body portion facing the single battery.

[0041] In some embodiments of the present application, the buffer layer comprises at least one of silica gel foam, silica gel sheet and structural glue.

[0042] In another aspect, the present application further provides a power consumption device comprising the battery pack according to any one of the technical solutions above.

[0043] The power utilization device provided in the present application comprises the battery pack as in any of the preceding technical solutions, and thus the same problems can be solved and the same effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0045] Fig. 1 is a perspective view of the battery pack in an embodiment of the present application;

[0046] Fig. 2 is an exploded view of the battery pack in an embodiment of the present application;

[0047] Fig. 3 is a sectional view of the battery pack in an embodiment of the present application;

[0048] Fig. 4 is a structural schematic view of the support in the battery pack in an embodiment of the present application;

[0049] Fig. 5 is a structural schematic view of the battery pack in another embodiment of the present application;

[0050] Fig. 6 is a structural schematic view of the support in the battery pack in another embodiment of the present application;

[0051] Fig. 7 is an enlarged view of part A in Fig. 3;

[0052] Fig. 8 is an enlarged view of part B in Fig. 5;

[0053] Fig. 9 is a structural schematic view of the single battery in the battery pack in an embodiment of the present application;

[0054] Fig. 10 is a structural schematic view of the cooling assembly in the battery pack in an embodiment of the present application.

[0055] Fig. 10 is a structural schematic view of the cooling assembly in the battery pack in an embodiment of the present application. DETAILED DESCRIPTION

[0056] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0057] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0058] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0059] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] The present application provides a battery pack and an electric device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0061] FIG. 1 is a perspective view of a battery pack according to an embodiment of the present application, FIG. 2 is an exploded view of the battery pack according to an embodiment of the present application, and FIG. 3 is a sectional view of the battery pack according to an embodiment of the present application. Referring to FIGS. 1-3, the battery pack according to the present application has a first direction Z and a second direction X intersecting each other, and includes a box 10, a support 30, a buffer layer 40, and a single battery 20. The box 10 includes a top cover 11, a frame 12, and a bottom plate 13. The top cover 11 and the bottom plate 13 are respectively connected to both sides of the frame 12 in the first direction Z to collectively define a receiving space 120. The support 30 is disposed in the receiving space 120. The support 30 includes a main body 31 and a support portion 32. The main body 31 is supported between the top cover 11 and the bottom plate 13 and is connected to the top cover 11 and the bottom plate 13, respectively. The support portion 32 is connected to a side of the main body 31 facing the bottom plate 13 and is connected to the bottom plate 13. The support portion 32 has a first plate surface 321 facing away from the bottom plate 13. The buffer layer 40 is disposed in the receiving space 120 and is connected to the first plate surface 321. The single battery 20 is disposed in the receiving space 120. The single battery 20 includes a housing 21 having a first side 211 facing the bottom plate 13. The first side 211 is connected to a side of the buffer layer 40 facing the top cover 11. The main body 31 has a dimension D1 mm in the second direction X that is smaller than a dimension D2 mm of the support portion 32 in the second direction X.

[0062] In the technical solution, the main body 31 of the support 30 is supported between the top cover 11 and the bottom plate 13 and is connected to the top cover 11 and the bottom plate 13, respectively. The support portion 32 of the support 30 is connected to the first side 211 of the single battery 20 through the buffer layer 40. When the bottom plate 13 is deformed by colliding with an obstacle, a part of the collision force is transmitted to the top cover 11 through the main body 31, and another part of the collision force is transmitted to the buffer layer 40 through the support portion 32. The buffer layer 40 can reduce the collision force transmitted to the single battery 20. The above-mentioned processing scheme of the collision force can reduce the probability that the single battery 20 collides with the bottom plate 13 and is damaged, thereby reducing the probability that the battery is disabled. In addition, the main body 31 has a dimension D1 mm in the second direction X that is smaller than a dimension D2 mm of the support portion 32 in the second direction X. Therefore, the buffer layer 40 can withstand more collision force, and the bottom plate 13 of the battery pack box 10 is prevented from being broken by excessive collision force.

[0063] Specifically, the bottom of the frame 12 has an opening, and the bottom plate 13 is disposed on the opening. The connection between the bottom plate 13 and the frame 12 can be threaded connection, clamping connection, or welding, which is not limited in the present application. Similarly, the connection between the support 30 and the bottom plate 13 can be welding, bonding, clamping connection, or threaded connection, which is not limited in the present application.

[0064] Referring again to Figure 3, the single battery 20 also includes a terminal post 22, which is disposed on the first side portion 211. The first side portion 211 is supported on the buffer layer 40. In other words, in the first direction Z, there is a first gap 20a between the first side portion 211 of the single battery 20 and the support portion 32 of the bracket 30, and the buffer layer 40 is located within the first gap 20a, as shown in Figure 7. That is, the terminal post 22 protrudes downward from the lower surface of the housing 21, the lower surface of the housing 21 faces the upper surface of the bottom plate 13, and the buffer layer 40 is disposed between the lower surface of the housing 21 and the bottom plate 13. In this embodiment, the single battery 20 is installed upside down inside the housing 10, which can enhance the overall rigidity of the battery pack and reduce the probability of battery pack damage. Furthermore, since the terminal post 22 faces the lower top cover 11, and the passenger is closer to the top cover 11 than the bottom plate 13, this arrangement can maximize passenger safety in the event of thermal runaway of the single battery 20.

[0065] It should be noted that the first side portion 211 is supported by the buffer layer 40, meaning that the projection area of ​​the electrode post 22 on the base plate 13 is offset from the projection area of ​​the buffer layer 40 on the base plate 13, which helps to improve the energy density of the battery pack. Specifically, in the first direction Z, the size of the buffer layer 40 is larger than the size of the electrode post 22 protruding from the first side portion 211. That is, there is a gap between the electrode post 22 and the base plate 13 in the first direction Z, and the two do not contact each other.

[0066] In some embodiments, as shown in Figures 3 and 4, the side of the main body 31 facing away from the support 32 is directly connected to the top cover 11, that is, the bracket 30 is inverted "T" shape, with its two ends contacting and connecting to the top cover 11 and the bottom plate 13 respectively. The structure of the bracket 30 is simple and conducive to improving the energy density of the battery pack. It should be noted that since the brackets 30 at both ends only need to support one single battery cell 20, in order to reduce the size of the housing 10 in the second direction X, the brackets 30 at both ends in the second direction X are "L" shaped.

[0067] In other embodiments, as shown in Figures 5 and 6, the housing 21 has a second side 212 facing the top cover 11, and the bracket 30 further includes a connecting portion 33. The connecting portion 33 is connected to at least one side of the main body 31 in the second direction X, and is located between the second side 212 and the top cover 11, and contacts the second side 212 and / or the top cover 11. That is, the bracket 30 is generally "I" shaped. The connection portion 33 can increase the contact area between the bracket 30 and the top cover 11, thereby helping to enhance the overall strength of the battery. It should be noted that since the brackets 30 at both ends only need to support one single battery cell 20, in order to reduce the size of the housing 10 in the second direction X, the brackets 30 at both ends in the second direction X are "U" shaped.

[0068] Hereinafter, the same parts of the two structures of the bracket 30 are described in detail.

[0069] Referring to FIGS. 7 and 8, the size of the first gap 20a in the first direction Z is H1 mm, and satisfies: 0.2≤H1≤10, so as to ensure that the buffer layer 40 has a proper thickness in the first direction Z, and thus ensure the buffering effect of the buffer layer 40. At the same time, it can also avoid that the size H1 mm of the first gap 20a in the first direction Z is too large, which leads to a low energy density of the battery pack.

[0070] In the first direction Z, the bottom plate 13 and the first side 211 of the shell 21 of the single battery 20 have a second gap 20b, and the size of the second gap 20b in the first direction Z is H2 mm, and satisfies: 3≤H2≤35, and H2>H1, so as to avoid that the size H2 mm of the second gap 20b in the first direction Z is too large, which leads to that the volume utilization of the battery pack is too large or too small to affect the safety of the battery. At the same time, it can also prevent that the second gap 20b is too small, which is not conducive to the installation of the bracket 30 and the buffer layer 40. It can be understood that the size of the support part 32 in the first direction Z is H3 mm, and satisfies: H3=H2-H1.

[0071] In the second direction X, the size of the main body part 31 is D1 mm, and satisfies: 0.5≤D1≤30. Thus, it can ensure that the main body part 31 has a good supporting effect, and also avoid that the size of the main body part 31 is too large, which leads to that the amount of material required for manufacturing the bracket 30 is large, and the manufacturing cost is high.

[0072] In some embodiments, the battery pack also has a third direction Y, and the first direction Z, the second direction X and the third direction Y are perpendicular to each other; the shell 21 includes two side walls 213 extending along the third direction Y and arranged oppositely, and the first side 211 is provided with two pole columns 22. In the second direction X, the size of the part of the support part 32 supporting the buffer layer 40 is D2 mm, and the size between the two side walls 213 and the pole columns 22 close to them is D3 mm, and satisfies: D2=(0.25-1)D3, so as to ensure that the contact area between the buffer layer 40 and the first side 211 of the shell 21 is relatively appropriate, which is conducive to ensuring the buffering effect of the buffer layer 40.

[0073] Hereinafter, the different parts of the two structures of the bracket 30 are described in detail.

[0074] As shown in FIGS. 5 and 6, in this embodiment, the support 30 includes a connecting portion 33 arranged on the top of the main body portion 31, the size of the single battery 20 in the second direction X is L mm, the size of the connecting portion 33 in the second direction X is D4 mm, and 0 < D4 ≤ L / 2 is satisfied, so as to ensure the contact area between the connecting portion 33 and the top plate 11, so as to better transmit the impact force received by the bottom plate 13 to the top plate 11, thereby better avoiding damage to the battery pack.

[0075] The performance of the technical solutions provided in the embodiments of the present application is evaluated below in combination with specific embodiments.

[0076] Embodiments 1 to 24 are provided, in which the size D3 mm between the two side walls 213 of the shell 21 and the adjacent pole column 22, and the size L mm of the single battery 20 in the second direction X are fixed values. In the battery pack selected by the present application, the size D3 = 27 mm between the two side walls 213 of the shell 21 and the adjacent pole column 22, and the size L = 208 mm of the single battery 20 in the second direction X.

[0077] It should be noted that the overall structural strength of the battery pack is characterized by stress testing in the embodiments of the present application. The maximum stress that the battery pack can withstand is detected during the test process. The maximum stress F can be detected by the mechanical impact test in GB38031-2020, and the unit is MPa. The greater the maximum stress that the battery pack can withstand, the higher the overall structural strength of the battery pack. The space utilization rate of the battery pack provided in the embodiments of the present application is characterized by energy density T, and the unit is Wh / kg. Energy density T = battery pack electric quantity / battery pack weight = cell single voltage * cell number * cell capacity / battery pack weight.

[0078] Specifically, embodiments 1 to 5 satisfy 0.2 ≤ H1 ≤ 10, and the remaining parameters are fixed values, for example, H2, D1, D2, D4. Embodiments 6 to 9 satisfy 3 ≤ H2 ≤ 35, and the remaining parameters are fixed values, for example, H1, D1, D2, D4. Embodiments 10 to 14 satisfy 0.5 ≤ D1 ≤ 30, and the remaining parameters are fixed values, for example, H1, H2, D2, D4. Embodiments 15 to 19 satisfy D2 = (0.25-1)D3, and the remaining parameters are fixed values, for example, H1, H2, D1, D4. Embodiments 20 to 24 satisfy 0 < D4 ≤ 0.5L, and the remaining parameters are fixed values, for example, H1, H2, D1, D2. The specific parameters and test results are shown in Table 1.

[0079] In addition, Comparative Examples 1-4 are provided. Comparative Example 1-2 is a test without the buffer layer, Comparative Example 1-3 is a test in which the size of the support portion 32 in the second direction X exceeds the size between the side wall 213 and the pole 22 close thereto, and Comparative Example 1-4 is a test in which the size of the support portion 32 in the second direction X is less than 0.25 times the size between the side wall 213 and the pole 22 close thereto.

[0080] Table 1

[0081] In combination with Examples 1-24 and Comparative Examples 1-4, it can be seen that:

[0082] (1) When the buffer layer 40 is not provided, the maximum stress of the battery pack is below 9 MPa, and when the buffer layer 40 is provided, the maximum stress of the battery pack is above 9 MPa, which significantly improves the structural strength of the battery pack.

[0083] (2) When the buffer layer 40 is provided and D2 = (0.25-1)D3, the maximum stress of the battery pack is all above 10 MPa, and the structural strength of the battery pack is relatively better.

[0084] The above describes the structure and size of the support 30 in detail. Next, the arrangement of the support 30 will be described in detail.

[0085] In some embodiments of the present application, as shown in FIGS. 3 and 5, the battery pack also has a second direction X, and the plurality of supports 30 are arranged in sequence along the second direction X, and the monomer battery 20 is arranged between two adjacent supports 30, and the monomer battery 20 is supported on the buffer layer 40 of the two adjacent supports 30. That is, each monomer battery 20 can be supported by the support 30 at both ends in the second direction X, and can be buffered by the buffer layer 40 to the impact force transmitted to the monomer battery 20 from the bottom plate 13, and the impact force can be dispersed by the two supports 30 located on both sides of the monomer battery 20, effectively reducing stress concentration, thereby preventing damage to the monomer battery 20.

[0086] It can be understood that each monomer battery 20 is supported by two supports 30 corresponding thereto. For example, if two monomer batteries 20 are included in the battery pack, four supports 30 are required to support the two monomer batteries 20, wherein the four supports 30 are arranged in sequence along the second direction X, and the two middle supports 30 are not placed with monomer batteries 20 therebetween, and the two middle supports 30 can have a gap therebetween or can be in close contact with each other, which is not limited in the present application.

[0087] In some embodiments of the present application, the battery pack further has a second direction X, the plurality of supports 30 are spaced along the second direction X, and the single batteries 20 are arranged between two adjacent supports 30 in the second direction X. At least one support 30 supports two single batteries 20 adjacent in the second direction X, i.e., the same support 30 can support two single batteries 20 adjacent in the second direction X, so as to reduce the number of supports 30 required in the battery pack and improve the production efficiency of the battery pack.

[0088] Based on the above embodiments, the battery pack further has a third direction Y, the first direction Z, the second direction X, and the third direction Y are perpendicular to each other, and a plurality of single batteries 20 are arranged along the third direction Y. At least one support 30 supports a plurality of single batteries 20 arranged along the third direction Y, i.e., the same support 30 can support a plurality of single batteries 20 arranged along the third direction Y, so as to further reduce the number of supports 30 and further improve the production efficiency of the battery pack.

[0089] Meanwhile, in order to ensure the supporting effect of the support 30 and the safety performance of the battery pack with the support 30, the support 30 is made of a rigid insulating material, so as to separate two single batteries 20 adjacent in the second direction X.

[0090] In some embodiments of the present application, the buffer layer 40 is made of a flexible or elastic material. For example, the buffer layer 40 includes at least one of silica gel foam, silica gel sheet, and structural glue.

[0091] In the present embodiment, the buffer layer 40 is on the first plate surface 321 and has a shape substantially the same as that of the first plate surface 321.

[0092] In some embodiments of the present application, in combination with FIGS. 3 and 9, the single battery 20 further includes a cover plate 23 arranged opposite to the bottom plate 13, and the pole 22 penetrates the cover plate 23. For example, the cover plate 23 is further provided with an explosion-proof valve 24.

[0093] In some embodiments of the present application, referring to FIG. 10, the battery pack further includes a cooling assembly 50 arranged on the side of the top cover 11 facing the bottom plate 13 and / or arranged on the side of the main body 31 facing the single battery 20, so as to cool the single battery 20 and play a role in heat insulation and heat loss prevention. For example, the cooling assembly 50 includes a graphite heat conduction plate and a heat spreading plate. Alternatively, the cooling assembly 50 includes a liquid cooling plate 51 and a channel 52 arranged on the liquid cooling plate 51. The channel 52 is used for flowing of a cooling medium to take away the heat of the single battery 20. Two ports of the channel 52 are respectively communicated with an external supply device and a storage device.

[0094] In some embodiments of the present application, the present application also provides a power consuming device comprising the battery pack according to any one of the preceding technical solutions. Since the power consuming device provided by the present application comprises the battery pack according to any one of the preceding technical solutions, both can solve the same problem and achieve the same effect.

[0095] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0096] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. In addition, the present specification applies specific examples to describe the principles and implementation of the present application, the above description of the embodiments is only for helping to understand the method of the present application and its core idea, and the content of the present specification should not be understood as a limitation of the present application. Industrial applicability

[0097] In summary, the present disclosure provides a battery pack and a power consuming device, which has simple overall structure, low cost, and can solve the problem that the existing battery box bottom will contact the monomer battery when colliding, causing the monomer battery to be damaged, resulting in battery failure.

Claims

1. A battery pack, wherein, The battery pack has a first direction (Z) and a second direction (X) intersecting each other, and comprises: a box body (10) including a top cover (11), a frame (12) and a bottom plate (13), the top cover (11) and the bottom plate (13) being connected to two sides of the frame (12) in the first direction (Z) respectively to jointly define an accommodation space (120); a support (30) arranged in the accommodation space (120), the support (30) including a main body portion (31) and a support portion (32), the main body portion (31) being supported between the top cover (11) and the bottom plate (13) and connected to the top cover (11) and the bottom plate (13) respectively, the support portion (32) being connected to one side of the main body portion (31) facing the bottom plate (13) and connected to the bottom plate (13), the support portion (32) having a first plate surface (321) facing away from the bottom plate (13); a buffer layer (40) arranged in the accommodation space (120) and connected to the first plate surface (321); a single battery (20) arranged in the accommodation space (120), the single battery (20) including a shell (21) having a first side portion (211) facing the bottom plate (13), the first side portion (211) being connected to one side of the buffer layer (40) facing the top cover (11); a dimension D1mm of the main body portion (31) in the second direction (X) is smaller than a dimension D2mm of the support portion (32) in the second direction (X).

2. The battery pack of claim 1, wherein, The buffer layer (40) is arranged on top of the first plate surface (321), and the single battery (20) is supported on the buffer layer (40) so that the first side portion (211) is spaced apart from the bottom plate (13).

3. The battery pack according to claim 1, wherein one side of the main body portion (31) facing away from the support portion (32) is directly connected to the top cover (11).

4. The battery pack of claim 1, wherein, The shell (21) has a second side portion (212) facing the top cover (11), and the support (30) further includes a connecting portion (33) connected to at least one side of the main body portion (31) in the second direction (X), the connecting portion (33) being located between the second side portion (212) and the top cover (11) and in contact with the second side portion (212).

5. The battery pack of claim 1, wherein, In the first direction (Z), a first gap (20a) is formed between the first side portion (211) and the support portion (32), and the buffer layer (40) is located in the first gap (20a).

6. The battery pack of claim 5, wherein, A dimension H1mm of the first gap (20a) in the first direction (Z) satisfies 0.2≤H1≤10.

7. The battery pack of claim 6, wherein, In the first direction (Z), a second gap (20b) is formed between the bottom plate (13) and the first side portion (211), and a dimension of the second gap (20b) in the first direction (Z) is H2mm and satisfies 3≤H2≤35 and H2>H1.

8. The battery pack of claim 1, wherein, In the second direction (X), the size of the main body part (31) is D1 mm, and 0.5≤D1≤30 is satisfied.

9. The battery pack of claim 1, wherein, The first side part (211) is provided with a pole (22) located on one side of the support part (32) so that the pole (22) is staggered with the buffer layer (40) and the support part (32) in the second direction (X).

10. The battery pack of claim 9, wherein, In the first direction (Z), the size of the buffer layer (40) is greater than the size of the pole (22) protruding from the first side part (211).

11. The battery pack of claims 9 and 10, wherein, The battery pack also has a third direction (Y), the first direction (Z), the second direction (X), and the third direction (Y) are perpendicular to each other; the shell (21) further comprises two side walls (213) extending along the third direction (Y) and oppositely arranged, two poles (22) are arranged on the first side part (211), in the second direction (X), the size of the part of the support part (32) supported on the buffer layer (40) is D2 mm, the size between the two side walls (213) and the poles (22) close to them is D3 mm, and D2=(0.25-1)D3 is satisfied.

12. The battery pack of claim 4, wherein, In the second direction (X), the size of the single battery (20) is L mm, and the size of the connecting part (33) in the second direction (X) is D4 mm, and 0<D4≤L / 2 is satisfied.

13. The battery pack of claim 1, wherein, There are multiple supports (30), and multiple supports (30) are arranged in sequence along the second direction (X), and the single battery (20) is arranged between adjacent two supports (30), and the single battery (20) is supported by the buffer layer (40) of adjacent two supports (30).

14. The battery pack of claim 1, wherein, There are multiple supports (30), and multiple supports (30) are arranged in sequence along the second direction (X), and the single battery (20) is arranged between adjacent two supports (30), and at least one support (30) simultaneously supports two single batteries (20) adjacent in the second direction (X).

15. The battery pack of claim 1, wherein, The battery pack also has a third direction (Y), the first direction (Z), the second direction (X), and the third direction (Y) are perpendicular to each other, and multiple single batteries (20) are arranged along the third direction (Y), and at least one support (30) simultaneously supports multiple single batteries (20) arranged along the third direction (Y).

16. The battery pack of claim 1, wherein, The support (30) comprises multiple, multiple supports (30) are sequentially and intermittently arranged in the accommodating space (120); The two supports (30) at both ends are "L" shaped, and the support part (32) is arranged on one side of the main body part (31); The middle support (30) is inverted "T" shaped, and the support part (32) is arranged on both sides of the main body part (31); The buffer layer (40) has multiple, and multiple buffer layers (40) are arranged one by one corresponding to the support part (32); The single cell (20) is disposed between two adjacent brackets (30), and two ends of the single cell (20) are respectively supported by the buffer layers (40) of two adjacent brackets (30).

17. The battery pack of claim 4, wherein, There are multiple brackets (30), and the multiple brackets (30) are sequentially arranged at intervals in the accommodation space (120); The two brackets (30) at both ends are in a "C" shape, and the support portion (32) and the connection portion (33) are provided on the same side of the main body portion (31); The bracket (30) in the middle is in an "I" shape, and the support portion (32) and the connection portion (33) are provided on both sides of the main body portion (31); There are multiple buffer layers (40), and the multiple buffer layers are arranged corresponding to the support portions one by one; The single cell (20) is disposed between two adjacent brackets (30), and two ends of the single cell (20) are respectively supported by the buffer layers (40) of two adjacent brackets (30).

18. The battery pack of claim 1, wherein, The battery pack further includes: A cooling component (50), which is disposed on the side of the top cover (11) facing the bottom plate (13), and / or, disposed on the side of the main body portion (31) facing the single cell (20).

19. The battery pack of claim 1, wherein, The buffer layer (40) is at least one of silica gel foam, silica gel sheet and structural adhesive.

20. An electrical device, comprising: It includes the battery pack according to any one of claims 1 to 19.

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