Support, battery assembly and electric equipment

Abstract

The utility model provides a support, a battery assembly and electric equipment. The support comprises a body part, an arc-shaped supporting part and reinforcing ribs. The arc-shaped supporting part protrudes from the body part and is used for supporting the cylindrical battery cell, the height difference between the highest position and the lowest position of the contact surface of the arc-shaped supporting part and the cylindrical battery cell is L, L is larger than or equal to 0.36 R and smaller than or equal to R, and R is the radius of the peripheral surface of the cylindrical battery cell. And through the arrangement of the arc-shaped supporting part, the mounting position of the cylindrical battery cell is provided, the cylindrical battery cell can be stably supported, and the stability is improved. And when a plurality of cylindrical battery cells are arranged, the consistency of gaps between the adjacent cylindrical battery cells can be ensured. The height difference L is ensured to be within a certain range, so that the depth of the arc-shaped supporting part can ensure that the battery cell is smoothly mounted in the base, enough bonding area can be provided, and meanwhile, the base is kept to have certain strength.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically to a bracket, a battery assembly and an electrical device. Background Art

[0002] In the manufacturing process of battery assemblies, it is usually necessary to stack battery cells, and mechanical structures such as frames or pressure plates are generally used to fix and support the battery cells. If the mechanical structure does not provide enough support, the battery cells may be displaced and deformed; if the mechanical structure provides too much support, the overall weight will increase and the energy density will be reduced. When cylindrical cells are stacked horizontally, the contact between the circular surfaces and the spacing control need to be considered. If the stacking distance is uneven or the force is uneven, the overall structure of the battery assembly may be unstable or pressure concentration may occur, thus affecting the performance and safety of the battery assembly.

[0003] Therefore, it is necessary to provide a bracket, a battery assembly and an electrical device to at least partially solve the above problems. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above problems, the first aspect of the present invention provides a bracket for installing a cylindrical battery cell, comprising:

[0006] the main body; and

[0007] An arc-shaped support portion, wherein the arc-shaped support portion and the main body portion are arranged along the height direction and the arc-shaped support portion protrudes from the main body portion, and the arc-shaped support portion forms a receiving cavity for supporting the cylindrical battery cell, wherein, along the height direction, the height difference between the highest point and the lowest point of the contact surface between the arc-shaped support portion and the cylindrical battery cell is L, wherein 0.36R≤L≤R, wherein R is the radius of the outer circumference of the cylindrical battery cell.

[0008] According to the bracket of the first aspect of the utility model, a receiving cavity for accommodating cylindrical battery cells is provided by setting the arc-shaped support portion, which can stably support the cylindrical battery cells and improve stability. When multiple cylindrical battery cells are provided, the consistency of the gaps between adjacent cylindrical battery cells can be ensured. By ensuring that the height difference L is within a certain range, the depth of the arc-shaped support portion can ensure that the battery cells are smoothly installed into the base, and can provide sufficient bonding area, while maintaining a certain strength of the base.

[0009] Optionally, at least one of the arc-shaped support portion and the main body portion is provided with a cavity.

[0010] Optionally, a reinforcing rib is further included, wherein the reinforcing rib is arranged in the cavity, and along the height direction, the top end of the reinforcing rib is located at the top of the cavity, and the bottom end of the reinforcing rib is located at the bottom of the cavity.

[0011] Optionally, a plurality of the arc-shaped support portions are connected sequentially along the first direction, and the reinforcing ribs are arranged between adjacent arc-shaped support portions.

[0012] Optionally, the arc-shaped support portion comprises a first connecting portion, an arc-shaped portion and a second connecting portion connected in sequence, and the arc-shaped portion is connected to the main body portion; wherein,

[0013] Along the direction in which the first connecting portion is away from the arc-shaped portion, the first connecting portion extends in a direction away from the main body portion;

[0014] Along the direction in which the second connection portion is away from the arc portion, the second connection portion extends in a direction away from the main body portion.

[0015] Optionally, in one of the arc-shaped support portions, along the direction in which the first connection portion is away from the arc-shaped portion, the distance between the first connection portion and the main body portion gradually increases; and / or

[0016] Along the direction in which the second connecting portion moves away from the arc-shaped portion, the distance between the second connecting portion and the main body portion gradually increases.

[0017] Optionally, the arc-shaped support portion is provided with a limited glue portion, the limited glue portion is located in the accommodating cavity, the limited glue portion is constructed as an arc-shaped structure adapted to the arc-shaped support portion, and the limited glue portion protrudes from the arc-shaped support portion;

[0018] At least two of the glue limiting portions are arranged opposite to each other along the second direction, and a glue coating space is formed between adjacent glue limiting portions.

[0019] Optionally, the adhesive limiting portion protrudes from the contact surface by 0.3 mm to 0.7 mm; and / or

[0020] The width of the glue limiting portion is 3 mm to 7 mm.

[0021] Optionally, a fixing portion is further included, and the fixing portion is arranged on the outer sides of both ends of the arc-shaped supporting portion along the first direction.

[0022] Optionally, the fixing portion is provided with partitions, and a plurality of partitions are cross-arranged to divide the inner cavity of the fixing portion into grid-shaped cavities extending along the height direction.

[0023] Optionally, a reinforcement portion is provided on a side of the main body portion away from the arc-shaped support portion.

[0024] Optionally, the bracket is integrally formed.

[0025] The second aspect of the utility model provides a battery assembly, comprising a cylindrical battery cell and the above-mentioned bracket, wherein the cylindrical battery cell is mounted on the bracket.

[0026] According to the battery assembly of the second aspect of the utility model, the cylindrical battery is firmly installed, the product consistency is high, and the overall structure of the battery assembly has strong anti-seismic ability and load-bearing capacity.

[0027] Optionally, a plurality of the cylindrical battery cells are arranged side by side along a first direction, and a plurality of the arc-shaped support portions are arranged side by side along the first direction.

[0028] Optionally, the arc-shaped support portion includes at least two glue limiting portions arranged opposite to each other along the second direction, and a glue coating space is formed between adjacent glue limiting portions. The glue coating space is used to apply structural glue, and the bracket is connected to the cylindrical battery cell through the structural glue.

[0029] Optionally, the glue coating space is coated with structural glue, and the structural glue is flush with the glue limiting portion on a side away from the arc-shaped supporting portion to form an end surface that fits with the outer circumference of the cylindrical battery core.

[0030] Optionally, along the height direction, the cylindrical battery core is arranged in multiple layers;

[0031] There is a gap between the adjacent cylindrical battery cells in the same layer, and at least parts of the cylindrical battery cells in adjacent layers are located in the gap.

[0032] Optionally, the three cylindrical battery cells in adjacent layers are adjacent to each other and the centers of the surfaces on the same side along the second direction form three vertices of an isosceles triangle.

[0033] Optionally, a cold plate is provided between the cylindrical battery cells in adjacent layers.

[0034] Optionally, a thermally conductive adhesive layer is provided between the cylindrical battery core and the cold plate.

[0035] Optionally, the two brackets are respectively located on the outer sides of both ends of the cylindrical battery core along the height direction.

[0036] Optionally, along the second direction, the cylindrical battery cell array is arranged in multiple rows.

[0037] Optionally, the adjacent cylindrical cells in the same layer are connected in series via a connecting bar; wherein,

[0038] The poles on the same side of the adjacent cylindrical cells in the same layer have opposite polarities; and / or

[0039] The positive output electrode and the negative output electrode of the cylindrical battery cell in the same layer are respectively led out from different ends of the bracket through the connecting bar; and / or

[0040] The positive output electrode of one layer is arranged opposite to the negative output electrode of another layer; and / or

[0041] The positive output poles in one row are arranged opposite to the negative output poles in another row.

[0042] A third aspect of the utility model provides an electrical device, comprising the above-mentioned battery assembly.

[0043] The electrical equipment according to the third aspect of the utility model has a technical effect similar to that of a battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0045] Figure 1 This is a three-dimensional schematic diagram of a bracket of a preferred embodiment of the utility model;

[0046] Figure 2 This is a schematic front view of a bracket of a preferred embodiment of the utility model;

[0047] Figure 3 This is a schematic front view of a battery assembly in a preferred embodiment of the utility model;

[0048] Figure 4 for Figure 3 An enlarged schematic diagram of part A in FIG.

[0049] Figure 5 for Figure 3 An enlarged schematic diagram of part B in FIG.

[0050] Figure 6 A schematic top view of a battery assembly in a preferred embodiment of the utility model;

[0051] Figure 7 For along Figure 6 Schematic diagram of the cross section taken along the midline AA;

[0052] Figure 8 This is a partial schematic diagram of a battery assembly in a preferred embodiment of the utility model, in which the cylindrical battery cells are arranged in two layers;

[0053] Fig. 9A schematic top view of a single-layer module of a battery assembly in a preferred embodiment of the utility model;

[0054] Fig.10 A schematic front view of a single-layer module of a battery assembly in a preferred embodiment of the utility model;

[0055] Fig.11 A schematic top view of a double-layer module of a battery assembly in a preferred embodiment of the utility model;

[0056] Fig.12 This is a three-dimensional schematic diagram of a high-voltage connection of a battery assembly in a preferred embodiment of the utility model;

[0057] Fig.13 This is an exploded stereoscopic schematic diagram of a battery assembly in a preferred embodiment of the utility model;

[0058] Fig.14 A three-dimensional schematic diagram of a cold plate.

[0059] Description of Reference Numerals

[0060] 1: Bracket

[0061] 110: Ontology Department

[0062] 120: Arc support

[0063] 1201: Cavity

[0064] 121: First connection part

[0065] 1211: First end A

[0066] 1212: Second end A

[0067] 122: Second connection part

[0068] 1221: First end B

[0069] 1222: Second end B

[0070] 123: Arc

[0071] 124: Glue Restriction Department

[0072] 1241: Glue coating space

[0073] 1242: Structural adhesive

[0074] 130: Reinforcement ribs

[0075] 140: Fixed part

[0076] 141: Partition

[0077] 150: Strengthening Department

[0078] 2: Cylindrical battery cell

[0079] 201: Gap

[0080] 210: Positive output

[0081] 220: Negative output pole

[0082] 230: Connection row

[0083] 3: Cold plate

[0084] 310: Thermal conductive adhesive layer

[0085] 320: Manifold

[0086] DH: Height Direction

[0087] D1: First direction

[0088] D2: Second direction DETAILED DESCRIPTION

[0089] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0090] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0091] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0092] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0093] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0094] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art.

[0095] There are two main application forms of battery components, namely battery packs and battery modules. Battery packs are composed of multiple battery modules, usually including battery management systems, heat dissipation components, shells and other components, and can be directly applied to various devices or vehicles. Battery modules are composed of several battery cells, usually used in larger-scale energy storage systems or vehicle power systems, and battery modules can also be equipped with heat dissipation components.

[0096] The battery assembly usually includes multiple battery cells, among which the cylindrical battery cell 2 is a common form of battery cell. Whether it is a battery pack or a battery module, the battery cells need to be integrated (for example, stacked), so the bracket 1 is one of the necessary components in the battery assembly. Along the height direction DH of the battery assembly, the cylindrical battery cells 2 can be stacked in a horizontal stacking manner, that is, the direction of the central axis of the cylindrical battery cell 2 is perpendicular to the height direction DH.

[0097] Reference Figure 1-Figure 2 The utility model provides a bracket 1 for installing a cylindrical battery cell 2. It includes a main body 110 and an arc-shaped support portion 120. The arc-shaped support portion 120 and the main body 110 are arranged along the height direction DH and the arc-shaped support portion 120 protrudes from the main body 110. The arc-shaped support portion 120 forms a receiving cavity for supporting the cylindrical battery cell 2, wherein, along the height direction DH, the height difference between the highest point and the lowest point of the contact surface between the arc-shaped support portion 120 and the cylindrical battery cell 2 is L, wherein 0.36R≤L≤R, where R is the radius of the outer circumference of the cylindrical battery cell 2. The contact surface between the arc-shaped support portion 120 and the cylindrical battery cell 2 is the inner wall of the receiving cavity. In the utility model, by setting the arc-shaped support portion 120, a receiving cavity for the cylindrical battery cell 2 is provided, which can stably support the cylindrical battery cell 2 and improve stability. When multiple cylindrical batteries 2 are provided, the consistency of the gap 201 between adjacent cylindrical batteries 2 can be ensured. The reinforcement ribs 130 are provided to increase the overall structural strength of the bracket 1, improve the bearing capacity of the bracket 1 for the cylindrical battery cell 2, and thus better protect the battery cell from external impact or extrusion. By ensuring that the height difference L is within a certain range, the depth of the arc-shaped support portion 120 can ensure that the cylindrical battery cell 2 is smoothly loaded into the arc-shaped support portion 120, and can provide a sufficient bonding area, while maintaining a certain strength of the bracket 1.

[0098] Optionally, at least one of the arc-shaped support portion 120 and the body portion 110 is provided with a cavity 1201. The provision of the cavity 1201 can reduce the overall weight of the bracket while ensuring the structural strength of the bracket.

[0099] Optionally, the bracket further includes a reinforcing rib 130, which is disposed in the cavity 1201, and along the height direction, the top of the reinforcing rib 130 is located at the top of the cavity 1201, and the bottom of the reinforcing rib 130 is located at the bottom of the cavity 1201. By setting the cavity 1201, the reinforcing rib 130 can make full use of the space, does not occupy the installation space, and can effectively reinforce the structure of the bracket 1 and improve the overall performance.

[0100] Optionally, a plurality of arc-shaped support portions 120 are connected in sequence along the first direction D1, and the reinforcing ribs 130 are arranged between adjacent arc-shaped support portions 120. Further, the reinforcing ribs 130 are arranged at the connection of adjacent arc-shaped support portions 120. The reinforcing ribs 130 are arranged at the connection of adjacent arc-shaped support portions 120, which can effectively reinforce the structure of the bracket 1, prevent the connection from loosening or breaking during use, and enhance the durability and stability of the bracket 1. During the installation of the battery cell, the arc-shaped support portion 120 is ensured not to be crushed or deformed.

[0101] Optionally, the arc-shaped support portion 120 includes a first connection portion 121, an arc-shaped portion 123, and a second connection portion 122 connected in sequence, and the arc-shaped portion 123 is connected to the body portion 110. In the direction in which the first connection portion 121 is away from the arc-shaped portion 123, the first connection portion 121 extends in a direction away from the body portion 110. In the direction in which the second connection portion 122 is away from the arc-shaped portion 123, the second connection portion 122 extends in a direction away from the body portion 110. The first connection portion 121 and the second connection portion 122 of the same arc-shaped support portion 120 are arranged opposite to each other along the first direction D1. In the first direction D1, the first connection portion 121 has a first end portion A 1211 and a second end portion A 1212 arranged opposite to each other, the first end portion A 1211 is connected to the arc-shaped portion 123, and the second end portion A 1212 extends in a direction away from the body portion 110. The second connection portion 122 has a first end B 1221 and a second end B 1222 that are arranged opposite to each other along the second direction D2, the first end B 1221 is connected to the arc portion 123, and the first end B 1221 is connected to the first end A 1211, and the second end B 1222 extends in a direction away from the main body portion 110. Thus, the second end A 1212, the first end A 1211, the arc portion 123, the first end B 1221, and the second end B 1222 are sequentially connected to form an arc surface. The arc surface is used to contact the cylindrical battery cell 2. The arc surface is similar in shape to the cylindrical battery cell 2. When multiple arc support portions 120 are connected, the second end B 1222 of the arc support portion 120 is connected to the second end A 1212 of the adjacent arc support portion 120.

[0102] Optionally, along the direction in which the first connection portion 121 is away from the arc portion 123, the distance between the first connection portion 121 and the main body portion 110 gradually increases. Along the direction in which the second connection portion 122 is away from the arc portion 123, the distance between the second connection portion 122 and the main body portion 110 gradually increases. That is, the volume of the cavity 1201 gradually increases from the arc portion 123 to the reinforcing rib 130, forming a triangular structure, which improves the stability and bearing capacity of the bracket 1 to a certain extent. Optionally, the arc support portion 120 is partially constructed as a thin-walled structure, so that part of the wall surface of the cavity 1201 is constructed as an arc, reducing the overall weight of the bracket 1.

[0103] Optionally, the arc-shaped support portion 120 is provided with a limited glue portion 124, and the limited glue portion 124 is located in the accommodating cavity. The limited glue portion 124 is constructed as an arc-shaped structure adapted to the arc surface, and the limited glue portion 124 protrudes from the arc-shaped support portion 120. Among them, at least two limited glue portions 124 are arranged relatively along the second direction D2, and a glue coating space 1241 is formed between adjacent limited glue portions 124. The second direction D2 is the axial direction of the cylindrical battery. The setting of the glue coating space 1241 can ensure uniform glue coating and firm bonding. The limited glue portion 124 with an arc-shaped structure can better adapt to the curved surface of the cylindrical battery cell 2, increase the bonding area, enhance the bonding force, and effectively prevent the battery cell from falling off or loosening during use.

[0104] Optionally, the glue limiting portion 124 protrudes from the contact surface by 0.3 mm to 0.7 mm. Exemplarily, the glue limiting portion 124 protrudes from the contact surface by 0.5 mm. The cylindrical battery cell 2 is mounted on the bracket 1, and a fan-shaped glue coating space 1241 with a thickness of 0.5 mm is formed when matched with the glue limiting portion 124. This space can ensure that the structural glue 1242 forms a consistent thickness of 0.5 mm after glue pressing, while preventing the structural glue 1242 from overflowing from both ends of the axial direction of the cylindrical battery cell 2.

[0105] The size and limited range of the glue limiting portion 124 can be determined according to the amount of glue applied. The glue limiting portion 124 can adjust the amount of glue applied and the bonding effect according to specific needs, thereby improving the adaptability and flexibility between the bracket 1 and the cylindrical battery cell 2. Optionally, the width of the glue limiting portion 124 is 3 mm to 7 mm. The glue limiting portion 124 has a high structural strength and ensures a good glue application and bonding effect.

[0106] Optionally, a fixing portion 140 is further included, and the fixing portion 140 is arranged on the outside of the two ends of the arc-shaped support portion 120 along the first direction D1. It can be understood that when the arc-shaped support portion 120 is provided in plurality, the fixing portion 140 is arranged on the outside of the two ends of the outermost arc-shaped support portion 120 along the first direction D1. The fixing portion 140 is used to connect the bracket 1 to an external structure. For example, the outer shell of the battery pack, the shelf of the battery module. The fixing portion 140 can provide additional support points to prevent the bracket 1 from shaking or deforming during use, thereby maintaining the stable installation of the cylindrical battery cell 2.

[0107] Optionally, the fixing portion 140 is provided with a partition 141, and a plurality of partitions 141 are cross-arranged to divide the inner cavity of the fixing portion 140 into a grid-shaped cavity extending along the height direction DH. Optionally, the intersection angle of the partitions 141 is a right angle. The partitions 141 are arranged to enhance the strength of the bracket 1, and the grid-shaped structure has good mechanical properties, and lightweight is achieved while ensuring its performance.

[0108] Optionally, a reinforcing portion 150 is further included. The reinforcing portion 150 is disposed on a side of the body portion 110 away from the arc-shaped supporting portion 120 to enhance the strength of the bracket 1. The reinforcing portion 150 extends along the first direction D1.

[0109] In the above embodiment, the bracket 1 is integrally formed. That is, at least part of the main body 110, the arc-shaped support portion 120, the reinforcing rib 130, the fixing portion 140 and the reinforcing portion 150 are integrally formed. The integrally formed bracket 1 structure can reduce gaps and connection points at the joints, thereby improving the strength and stability of the overall structure. By integrally forming multiple parts, the seams or connections between materials can be reduced, avoiding the bracket 1 structure being unstable due to loose joints.

[0110] A battery assembly comprises the above-mentioned bracket 1 , a cylindrical battery cell 2 is mounted on the bracket 1 , and the shape of the outer circumference of the cylindrical battery cell 2 matches the shape of the arc-shaped support portion 120 .

[0111] In the utility model, the cylindrical battery cells 2 are stacked in a certain manner. Optionally, the above-mentioned bracket 1 can be set above the uppermost cylindrical battery cell 2 and below the lowermost cylindrical battery cell 2 along the height direction DH. Optionally, the upper bracket 1 is fixedly connected to the lower bracket 1. Optionally, the upper bracket 1 is connected to the lower bracket 1 by riveting and / or welding. Optionally, laser welding is used for welding.

[0112] like Figure 3-Figure 6 , Figure 9-10 As shown, a plurality of cylindrical cells 2 are arranged side by side along a first direction D1. Optionally, the cylindrical cells 2 are arranged side by side in a row in a manner that the central axis is parallel. The first direction D1 is perpendicular to the axial direction of the cylindrical cells 2. A plurality of arc-shaped support portions 120 are arranged side by side along the first direction D1, and the number of the cylindrical cells 2 corresponds to the number of the arc-shaped support portions 120. In this embodiment, the arrangement in a manner that the central axis is parallel can effectively save space and enable the plurality of cylindrical cells 2 to be placed more compactly on the bracket 1.

[0113] like Figure 8 and Fig.11 As shown, along the height direction DH, the cylindrical battery cells 2 are arranged in multiple layers. Optionally, a row of cylindrical battery cells 2 is arranged in each layer. The cylindrical battery cells 2 are arranged side by side in a row in a manner parallel to the central axis, and are stacked in multiple layers. Among them, there is a gap 201 between adjacent cylindrical battery cells 2 in the same layer, and at least part of the cylindrical battery cells 2 of the adjacent layer is located in the gap 201. That is, the cylindrical battery cells 2 of the upper and lower layers are arranged in a staggered structure. The staggered structure can make the cylindrical battery cells 2 of adjacent layers support each other, thereby increasing the stability of the overall structure. At the same time, the overall structure can be made more compact and save space.

[0114] As can be seen from the foregoing, the cylindrical battery cell 2 is provided with one or more layers. Two brackets are provided. The two brackets are respectively located on the outer sides of both ends of the cylindrical battery cell in the height direction. That is, the two brackets are respectively located above and below the cylindrical battery cell, which can effectively support and stabilize the cylindrical battery cell and facilitate assembly and maintenance.

[0115] Optionally, three cylindrical battery cells 2 in adjacent layers are adjacent to each other and the surface centers on the same side along the second direction D2 form three vertices of an isosceles triangle. Among them, the line connecting the surface centers of the cylindrical battery cells 2 in the same layer on the same side along the second direction D2 is the base of the isosceles triangle; the line connecting the surface centers of the cylindrical battery cells 2 in adjacent layers on the same side along the second direction D2 is the waist of the isosceles triangle. This layout can effectively utilize space, making the spacing between the cylindrical battery cells 2 smaller and improving the compactness of the overall structure. The isosceles triangle structure can distribute the force more evenly to the cylindrical battery cells 2 in adjacent layers. This helps to reduce local stress concentration and improve the load-bearing capacity of the bracket 1 for the battery. Figure 8 As shown, L1 = battery cell diameter + battery cell safety gap 201. Among them, the battery cell safety gap 201 is obtained according to experiments, design experience, etc. L2 = battery cell diameter + cold plate 3 thickness + 2 times the thickness of thermal conductive glue. Among them, the thickness of thermal conductive glue determines the optimal thickness according to thermal simulation. L1 and L2 are related to the thermal management performance and energy density of the package, which need to be considered comprehensively. Optionally, L1 = L2. That is, the line connecting the surface centers of the three cylindrical battery cells 2 on the same side of the second direction D2 in adjacent layers is an equilateral triangle. By setting an equilateral triangle, the structural stability and space utilization of the battery pack are improved.

[0116] like Figure 12-13 As shown, along the second direction D2, the cylindrical battery cells 2 are arranged in multiple rows. In combination with the above, multiple cylindrical battery cells 2 are arranged in a row along the first direction D1. Multiple rows of cylindrical battery cells 2 are arranged in a layer along the second direction D2. Optionally, along the height direction DH, multiple layers of cylindrical battery cells 2 are arranged in a staggered manner.

[0117] Based on the above embodiments, return to Figure 7 A glue coating space 1241 is formed between adjacent glue limiting portions 124 of the same arc-shaped support portion 120. The glue coating space 1241 is used to coat the structural glue 1242. The bracket 1 and the cylindrical battery cell 2 are connected by the structural glue 1242. The structural glue 1242 can provide a strong adhesive force to ensure that the connection between the bracket 1 and the battery cell is firm and reliable. The glue coating space 1241 can ensure that the structural glue 1242 is evenly coated on the contact surface between the bracket 1 and the cylindrical battery cell 2. By limiting the volume of the glue coating space 1241, the glue coating amount can be limited to achieve consistency between multiple battery cells and ensure consistency in product quality.

[0118] Optionally, the structural adhesive 1242 is flush with the adhesive limiting portion 124 on the side away from the arc-shaped support portion 120 to form an end surface that fits the outer circumference of the cylindrical battery cell 2. This prevents the structural adhesive 1242 from overflowing or the adhesive thickness from not meeting the standard after the cylindrical battery cell 2 is bonded and pressure maintained.

[0119] Optionally, there is a gap 201 between adjacent cylindrical cells 2 in the same layer, and at least part of the arc-shaped support portion 120 is located in the gap 201. The arc-shaped support portion 120 ensures the consistency of the gap 201 between adjacent cells, and the gap 201 between adjacent cells can be controlled by adjusting the series arc axis spacing.

[0120] like Figure 8 As shown, a cold plate 3 is provided between the cylindrical cells 2 of adjacent layers, and the cold plate 3 has a serpentine structure. The structure of the cold plate 3 is adapted to the shape and arrangement of the cylindrical cells 2. In addition, the cold plate 3 can serve as a supporting component to support and fix the cylindrical cells 2 of adjacent layers. The serpentine structure can increase the rigidity and stability of the cold plate 3 and improve the stability of the overall structure. Fig.14 As shown, the direct cooling plate 3 is an integral type, and the four small cold plates 3 are connected to the inlet and outlet manifold 320 by brazing or other welding methods. The cold plate 3 in this embodiment has no detachable components to ensure its refrigeration function. The inlet and outlet manifold 320 is provided with a section of crimped hose to avoid errors caused by all rigid connections during assembly. Optionally, the cooling circuit adopts a 2-in 2-out form to increase the cooling speed and reduce the temperature difference.

[0121] like Fig.13 As shown, a thermally conductive adhesive layer 310 is provided between the cylindrical battery core 2 and the cold plate 3. The thermally conductive adhesive layer 310 has good thermal conductivity, thereby improving the heat dissipation efficiency of the battery assembly.

[0122] like Fig.12 As shown, adjacent cylindrical battery cells 2 in the same layer are connected in series through a connecting row 230. Optionally, the polarities of the poles on the same side of adjacent cylindrical battery cells 2 in the same layer and the same row are opposite. Optionally, the positive output pole 210 and the negative output pole 220 of the cylindrical battery cells 2 in the same layer and the same row are respectively led out from different ends of the bracket 1 through the connecting row 230. The positive output pole 210 of one layer is arranged opposite to the negative output pole 220 of another layer. The positive output pole 210 of one row is arranged opposite to the negative output pole 220 of another row. Through the stacking method of the above-mentioned cylindrical battery cells 2, a simpler high-voltage connection scheme can be obtained. At the same time, this arrangement is suitable for the poles at both ends of the battery cells, which avoids the battery cell shell from being charged.

[0123] The utility model also provides an electric device, comprising the battery assembly. The cylindrical battery is firmly installed with high consistency. The overall structure of the electric device has strong vibration resistance and load-bearing capacity.

[0124] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0125] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A bracket for mounting a cylindrical battery cell, characterized in that: include: Body part; and An arc-shaped support portion, wherein the arc-shaped support portion and the main body portion are arranged along the height direction and the arc-shaped support portion protrudes from the main body portion, and the arc-shaped support portion forms a receiving cavity for supporting the cylindrical battery cell, wherein, along the height direction, the height difference between the highest point and the lowest point of the contact surface between the arc-shaped support portion and the cylindrical battery cell is L, wherein 0.36R≤L≤R, wherein R is the radius of the outer circumference of the cylindrical battery cell.

2. The bracket according to claim 1, characterized in that: At least one of the arc-shaped support portion and the body portion is provided with a cavity.

3. The bracket according to claim 2, characterized in that: It also includes a reinforcing rib, which is arranged in the cavity, and along the height direction, the top end of the reinforcing rib is located at the top of the cavity, and the bottom end of the reinforcing rib is located at the bottom of the cavity.

4. The bracket according to claim 3, characterized in that: The plurality of arc-shaped support portions are connected in sequence along a first direction, and the reinforcing rib is arranged between adjacent arc-shaped support portions.

5. The bracket according to any one of claims 1 to 4, characterized in that: The arc-shaped support portion includes a first connecting portion, an arc-shaped portion and a second connecting portion connected in sequence, and the arc-shaped portion is connected to the main body portion; wherein, Along the direction in which the first connecting portion is away from the arc-shaped portion, the first connecting portion extends in a direction away from the main body portion; Along the direction in which the second connection portion is away from the arc portion, the second connection portion extends in a direction away from the main body portion.

6. The bracket according to claim 5, characterized in that: In one of the arc-shaped support portions, Along the direction in which the first connecting portion is away from the arc-shaped portion, the distance between the first connecting portion and the main body portion gradually increases; and / or Along the direction in which the second connecting portion moves away from the arc-shaped portion, the distance between the second connecting portion and the main body portion gradually increases.

7. The stent according to any one of claims 1 to 4, characterized in that: The arc-shaped support portion is provided with a limited glue portion, the limited glue portion is located in the accommodating cavity, the limited glue portion is constructed as an arc-shaped structure adapted to the arc-shaped support portion, and the limited glue portion protrudes from the arc-shaped support portion; At least two of the glue limiting portions are arranged opposite to each other along the second direction, and a glue coating space is formed between adjacent glue limiting portions.

8. The bracket according to claim 7, characterized in that: The glue limiting portion protrudes from the contact surface by 0.3 mm to 0.7 mm; and / or The width of the glue limiting portion is 3 mm to 7 mm.

9. The bracket according to claim 1, characterized in that: It also includes a fixing portion, which is arranged on the outer sides of two ends of the arc-shaped supporting portion along the first direction.

10. The bracket according to claim 9, characterized in that: The fixing portion is provided with partitions, and a plurality of partitions are cross-arranged.

11. The bracket according to claim 1, characterized in that: A reinforcement portion is disposed on a side of the main body away from the arc-shaped support portion.

12. The bracket according to claim 1 or 9 or 10 or 11, characterized in that: The bracket is integrally formed.

13. A battery assembly, characterized in that: It comprises a cylindrical battery cell and a bracket according to any one of claims 1 to 12, wherein the cylindrical battery cell is mounted to the bracket.

14. The battery assembly according to claim 13, characterized in that: The plurality of cylindrical battery cells are arranged side by side along a first direction, and the plurality of arc-shaped support portions are arranged side by side along the first direction.

15. The battery assembly according to claim 14, characterized in that: The arc-shaped support portion includes at least two glue limiting portions arranged opposite to each other along the second direction, and a glue coating space is formed between adjacent glue limiting portions. The glue coating space is used for coating structural glue, and the bracket is connected to the cylindrical battery cell through the structural glue.

16. The battery assembly according to claim 15, characterized in that: The glue coating space is coated with structural glue, and the structural glue is flush with the glue limiting portion on a side away from the arc-shaped supporting portion to form an end surface that fits with the outer peripheral surface of the cylindrical battery core.

17. The battery assembly according to claim 14, characterized in that: In the height direction, the cylindrical battery core is arranged in multiple layers; There is a gap between the adjacent cylindrical battery cells in the same layer, and at least parts of the cylindrical battery cells in adjacent layers are located in the gap.

18. The battery assembly according to claim 17, characterized in that: The three cylindrical battery cells in adjacent layers are adjacent to each other, and the centers of the surfaces on the same side along the second direction form three vertices of an isosceles triangle.

19. The battery assembly according to claim 17, characterized in that: A cold plate is arranged between the cylindrical battery cells in adjacent layers.

20. The battery assembly according to claim 19, characterized in that A heat-conducting adhesive layer is arranged between the cylindrical battery core and the cold plate.

21. The battery assembly according to any one of claims 13 to 20, characterized in that: The two brackets are respectively located on the outer sides of both ends of the cylindrical battery core along the height direction.

22. The battery assembly according to any one of claims 13 to 20, characterized in that: Along the second direction, the cylindrical battery cell array is arranged in multiple rows.

23. The battery assembly according to claim 22, characterized in that: The adjacent cylindrical cells in the same layer are connected in series through connecting bars; wherein, The poles on the same side of the adjacent cylindrical cells in the same layer have opposite polarities; and / or The positive output electrode and the negative output electrode of the cylindrical battery cell in the same layer are respectively led out from different ends of the bracket through the connecting bar; and / or The positive output electrode of one layer is arranged opposite to the negative output electrode of another layer; and / or The positive output poles of one row are arranged opposite to the negative output poles of another row.

24. An electrical equipment, characterized in that: Comprising a battery assembly according to any one of claims 13-23.

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