Battery cell support and battery pack

Abstract

The embodiment of the utility model provides a battery cell bracket and a battery pack, and relates to the technical field of battery manufacturing. A raised connecting lug is arranged on the first side of the battery cell bracket, and a buckle is arranged at the position, close to the second side, of the battery cell bracket; a through hole is formed in the connecting lug and is used for being inserted and fixed with a buckle of another battery cell bracket close to the first side; the buckle is used for being inserted and fixed with the through hole of the other battery cell bracket close to the second side, and the first side is opposite to the second side. And different battery cell brackets are inserted and fixed in the through holes in the connecting lugs through the buckles to form a connecting structure, so that the connecting reliability is improved. Besides, an additional connecting structure is prevented from being arranged outside the battery cell bracket, so that the utilization rate of the battery cell bracket is improved, and the modularization of assembly between different battery cell brackets is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and specifically relates to a battery core bracket and a battery pack. Background Art

[0002] With the development of battery pack energy storage technology, the safety and quality of battery packs have received more and more attention. In order to enhance the safety of battery packs and prevent the single cells in the battery module from being damaged due to bumps during transportation and assembly, cell holders are usually used to fix the cells.

[0003] With the requirement for higher battery life and higher power, the capacity of the battery pack needs to be increased. Usually, multiple battery cell holders are provided to increase the number of fixed battery cells, i.e., modular design.

[0004] In the related art, the connection reliability between different battery cell brackets is poor, which can easily cause shaking and damage to the battery cells, leading to safety issues. Utility Model Content

[0005] The purpose of the embodiments of the utility model is to provide a battery cell holder and a battery pack, in order to solve the problem of poor connection reliability between different battery cell holders in the related art.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] In a first aspect, an embodiment of the utility model provides a battery cell holder, wherein a protruding connection ear is provided on a first side of the battery cell holder, and a buckle is provided near a second side of the battery cell holder;

[0008] The connecting ear is provided with a through hole, and the through hole is used to be plugged and fixed with a buckle of another battery cell bracket close to the first side;

[0009] The buckle is used for plugging and fixing with a through hole of another battery cell bracket close to the second side, and the first side is opposite to the second side.

[0010] Optionally, the battery cell support is further provided with at least two first limiting protrusions;

[0011] The buckle is located between at least two of the first limiting protrusions, and along the extension direction of the first limiting protrusion, the two sides of the connecting ear are aligned with one of the first limiting protrusions respectively, and the connecting ear is used to be embedded between at least two first limiting protrusions of another battery cell bracket close to the first side.

[0012] Optionally, at least one second limiting protrusion is provided on one side of the battery cell support;

[0013] At least one second limiting protrusion and at least one first limiting protrusion are spaced apart to form a first limiting groove, and the first limiting groove is used to fix the third limiting protrusion on the inner wall of the shell.

[0014] Optionally, the other adjacent side of the battery cell support is further provided with a fourth limiting protrusion or one of the second limiting grooves, which is used to fix the other of the fourth limiting protrusion or the second limiting groove on the inner wall of the shell.

[0015] Optionally, the battery cell support includes four side frames connected end to end, and the four side frames are arranged to form a receiving cavity for fixing the battery cell.

[0016] Optionally, an annular flange is provided inside the accommodating cavity, and the annular flange is used to separate at least two adjacent battery cells in the accommodating cavity. Optionally, at least one side frame is provided with at least two connecting ears along the extension direction, and each connecting ear is correspondingly provided with a buckle.

[0017] Optionally, heat dissipation holes are provided on the side frames of the battery cell support.

[0018] Optionally, two opposite side frames are each extended with a fixing ridge, and a space for fixing the collection plate is formed between the two opposite fixing ridges.

[0019] In a second aspect, an embodiment of the utility model further provides a battery pack, comprising at least two battery cells and a battery cell bracket as described in any one of the above items;

[0020] At least one battery cell is fixed in each battery cell bracket.

[0021] Optionally, the battery pack further comprises a flame retardant plate;

[0022] The flame retardant plate is arranged between two adjacent battery core brackets.

[0023] Optionally, the battery pack further comprises a heat conducting plate, and at least two of the battery cells distributed along the thickness direction are fixed in at least one of the battery cell holders;

[0024] The heat conducting plate is arranged in the battery core support and is located between at least two of the battery cores.

[0025] Optionally, the battery pack further comprises a shell, and at least two of the battery cell holders abut against an inner wall of the shell.

[0026] In an embodiment of the utility model, a connecting ear is provided on the first side of the battery cell support, and the connecting ear protrudes from the battery cell support along the height direction of the battery cell support, and a through hole is provided on the connecting ear. A buckle is provided on the second side close to the battery cell support. The through hole on the connecting ear of each battery cell support is used to be plugged and fixed with the buckle of another adjacent battery cell support located on the first side, and the buckle of each battery cell support is used to be plugged and fixed with the through hole of another adjacent battery cell support located on the second side. That is, any two adjacent battery cell supports are plugged and fixed in the through hole on the connecting ear by the buckle to form a connecting structure, which improves the connection reliability between different battery cell supports and avoids the damage and safety problems of the battery cell caused by the shaking of the battery cell support during use. In addition, the connecting ear and the buckle structure of the embodiment of the utility model are integrated on the battery cell support, which avoids the need to set an additional connecting structure outside the battery cell support, improves the utilization rate of the battery cell support, reduces the occupied volume and structural complexity of the connecting structure, and is conducive to the modularization of assembly between different battery cell supports.

[0027] The battery pack provided in the embodiment of the utility model has the same advantages as the battery cell bracket provided in the above embodiment compared with the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the battery support provided by the embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the assembly positions of multiple battery cell brackets in an embodiment of the utility model;

[0030] Figure 3 It is a schematic diagram of the assembly structure of the battery support and the heat conducting plate in the embodiment of the utility model;

[0031] Figure 4 It is an exploded view of the battery support and battery assembly structure in the embodiment of the utility model;

[0032] Figure 5 It is a schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0033] Figure 6 It is a schematic diagram of the housing structure of an embodiment of the utility model;

[0034] Figure 7 In the present utility model embodiment Figure 6 Plan view along direction A.

[0035] Reference numerals:

[0036] 1-battery cell bracket, 1a-first battery cell bracket, 1b-second battery cell bracket, 1c-third battery cell bracket, 10-side frame, 101-fixed ridge, 102-annular flange, 11-connecting ear, 111-through hole, 12-buckle, 13-first limiting protrusion, 131-limiting guide groove, 14-second limiting protrusion, 141-first limiting groove, 15-fourth limiting protrusion, 16-heat dissipation hole, 17-ear connection port, 2-battery cell, 21-ear, 3-heat conducting plate, 4-flame retardant plate, 5-shell, 51-third limiting protrusion, 52-second limiting groove. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The terms "first", "second", etc. in the specification of the utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0039] The cell support and battery pack provided by the embodiment of the utility model are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0040] Reference Figure 1 and Figure 2 The embodiment of the utility model provides a battery cell holder 1, wherein a protruding connecting ear 11 is provided on a first side of the battery cell holder 1, and a buckle 12 is provided on the battery cell holder 1 near the second side; a through hole 111 is provided on the connecting ear 11, and the through hole 111 is used for plugging and fixing with the buckle 12 of another battery cell holder 1 near the first side; the buckle 12 is used for plugging and fixing with the through hole 111 of another battery cell holder 1 near the second side, and the first side is opposite to the second side.

[0041] Specifically, Figure 1The schematic diagram of the structure of the battery holder 1 provided in the embodiment of the utility model is shown. The first side of the battery holder 1 is provided with a protruding connection ear 11, that is, Figure 1 In the Z direction, the connecting ear 11 protrudes from the upper side of the battery holder 1. The shape of the connecting ear 11 can be set to be circular or polygonal, which is not limited in this embodiment. The part of the connecting ear 11 protruding from the upper side of the battery holder 1 is provided with a through hole 111, and the shape of the through hole 111 can be set to be circular or polygonal, that is, the connecting ear 11 is a female buckle structure. The battery holder 1 is close to the second side and Figure 1 A buckle 12 is provided at the lower side along the Z direction, and the buckle 12 is a raised male buckle structure, and its shape and size match the shape and size of the through hole 111. The battery holder 1 has a accommodating space for fixing the battery 2, and each battery holder 1 can fix at least one battery 2. Each battery holder 1 and the battery 2 fixed thereto form a battery module, which can be produced and used independently.

[0042] like Figure 2 The schematic diagram of the assembly position of multiple battery holders 1 in the embodiment of the utility model is shown. Taking the assembly of three battery holders 1 as an example, the first battery holder 1a, the second battery holder 1b and the third battery holder 1c are distributed along the positive Z direction. Along the Z direction, the buckle 12 on the lower side of the third battery holder 1c is inserted and fixed in the through hole 111 of the connecting ear 11 on the upper side of the second battery holder 1b; the buckle 12 on the lower side of the second battery holder 1b is inserted and fixed in the through hole 111 of the connecting ear 11 on the upper side of the first battery holder 1a. In this way, four, five or more battery holders 1 can also be stacked and connected, and this embodiment will not be repeated here. The through hole 111 of the connecting ear 11 on the upper side of the third battery holder 1c can be used as a pull ring when idle. The operator can prepare an additional pulling tool such as a rope, which can be passed through the through hole 111 to pull the third battery holder 1c, that is, the battery holder 1 at the top of the assembly, out of the shell, thereby improving the convenience of disassembly. Therefore, in this embodiment, the stacking connection between upper and lower battery cell holders 1 is achieved through the through hole 111 of the connecting ear 11 and the buckle 12 structure provided on each battery cell holder 1 .

[0043] In the embodiment of the utility model, any two adjacent battery holders 1 are fixed by plugging the buckle 12 into the through hole 111 on the connecting ear 11 to form a connection structure, which improves the connection reliability between different battery holders 1 and avoids the shaking of the battery holder 1 during use, which may cause damage to the battery 2 and safety problems. In addition, the connecting ear 11 and the buckle 12 structure are integrated on the battery holder 1, which avoids the need to set an additional connection structure outside the battery holder 1, improves the utilization rate of the battery holder 1, reduces the occupied volume and structural complexity of the connection structure, and is conducive to the convenience and modularization of assembly between different battery holders 1. In the modular assembly process, the through hole 111 of the connecting ear 11 of the uppermost battery holder 1 can also be used to pull the battery holder 1 for use, realizing the multifunctional use of the component.

[0044] Optionally, refer to Figure 1 and Figure 2 The battery cell holder 1 is also provided with at least two first limiting protrusions 13; the buckle 12 is located between at least two of the first limiting protrusions 13, and along the extension direction of the first limiting protrusions 13, the two sides of the connecting ear 11 are respectively aligned with one of the first limiting protrusions 13, and the connecting ear 11 is used to be embedded between at least two first limiting protrusions 13 of another battery cell holder 1 close to the first side.

[0045] Specifically, if Figure 1 and Figure 2 As shown, at least two first limiting protrusions 13 are also provided on the battery holder 1, and the first limiting protrusions 13 extend along the Z direction and are convex ridge structures. Each buckle 12 is located between the two first limiting protrusions 13. And along the Z direction, the extension lines on both sides of the connecting ear 11 are collinear with the inner side of the first limiting protrusion 13 on each side, or a certain assembly gap is provided between the extension lines on both sides of the connecting ear 11 and the inner side of the first limiting protrusion 13. It is convenient to align and assemble the connecting ear 11 with the two first limiting protrusions 13 of another battery holder 1 on the upper side. The connecting ear 11 is embedded in the limiting guide groove 131 formed between the two first limiting protrusions 13, and the shaking displacement between different battery holders 1 is limited in the X direction. In addition, the first limiting protrusion 13 can be provided with an inclined surface structure along the Y direction to limit the shaking displacement between different battery holders 1 in the Y direction. The lower end of the connecting ear 11 can also be provided with an inclined surface structure to facilitate guided assembly. During the assembly process, the connecting ear 11 on the upper part of the battery cell holder 1 is embedded between the two first limiting protrusions 13 of another battery cell holder 1 on the upper part. At the same time, the through hole 111 of the connecting ear 11 is plugged and fixed with the buckle 12 of the upper battery cell holder 1. While connecting different battery cell holders 1, the shaking displacement of adjacent battery cell holders 1 is limited, thereby further improving the connection reliability between different battery cell holders 1.

[0046] Optionally, refer to Figure 1 , Figure 6 and Figure 7 At least one second limiting protrusion 14 is provided on one side of the battery cell support 1; at least one second limiting protrusion 14 is spaced apart from at least one first limiting protrusion 13 to form a first limiting groove 141, and the first limiting groove 141 is used to fix the third limiting protrusion 51 on the inner wall of the shell 5.

[0047] Specifically, if Figure 1 , Figure 6 and Figure 7 As shown, the battery holder 1 needs to be assembled and fixed in the shell 5, i.e., the aluminum barrel, and the outer side of the battery holder 1 abuts against the inner wall of the shell 5. In order to improve the fixing reliability between the battery holder 1 and the shell 5, a certain limiting fixing structure needs to be set. At least one second limiting protrusion 14 is arranged on the outer side of the battery holder 1, which also extends along the Z direction and is a convex ridge structure. Each second limiting protrusion 14 is close to a first limiting protrusion 13, and a first limiting groove 141 is formed between it and a first limiting protrusion 13. Therefore, a third limiting protrusion 51 extending along the Z direction is arranged on the inner wall of the shell 5, which matches the structure of the first limiting groove 141. When the battery holder 1 is assembled inside the shell 5, the third limiting protrusion 51 on the inner wall of the shell 5 is embedded in the first limiting groove 141 on the outer side of the battery holder 1 to avoid shaking of the battery holder 1 relative to the shell 5 along the length direction, i.e., the displacement in the X direction. The second limiting protrusion 14 and the first limiting protrusion 13 can both abut against the inner wall of the housing 5 to prevent the gap between the battery holder 1 and the housing 5 due to human error or generation tolerance, and to prevent the battery holder 1 from shaking due to unstable fixation inside the housing 5. In addition, the first limiting protrusion 13 structure is effectively utilized to form a first limiting groove 141 with the second limiting protrusion 14, so that one side of the first limiting protrusion 13 is used to limit and fix other adjacent battery holders 1, and the other side is used to limit and fix the housing 5, which improves the component utilization rate and reduces the structural complexity.

[0048] Optionally, refer to Figure 1 , Figure 6 and Figure 7 The other adjacent side of the cell support 1 is also provided with a fourth limiting protrusion 15 or one of the second limiting grooves 52 for fixing the other of the fourth limiting protrusion 15 or the second limiting grooves 52 on the inner wall of the shell 5 .

[0049] Specifically, if Figure 1As shown, the left and right sides of the battery holder 1 are provided with second limiting protrusions 14, which extend along the Z direction and cooperate with the third limiting protrusions 51 on the inner wall of the shell 5 to limit the displacement and shaking of the battery holder 1 along the X direction. The front and rear sides of the battery holder 1 are provided with limiting structures extending along the Z direction to limit the displacement and shaking of the battery holder 1 along the Y direction. It should be noted that the front and rear sides described in this embodiment are distributed along the X direction, and the left and right sides are distributed along the Y direction. Figure 6 and Figure 7 As shown, the limiting structure is a limiting protrusion or a limiting groove. For example, the limiting structure is provided in the following two situations: when the fourth limiting protrusion 15 is provided on the front and rear sides of the battery holder 1, the second limiting groove 52 is provided on the inner wall of the shell 5; when the second limiting groove 52 is provided on the front and rear sides of the battery holder 1, the fourth limiting protrusion 15 is provided on the inner wall of the shell 5. The fourth limiting protrusion 15 and the second limiting groove 52 both extend along the Z direction, and the fourth limiting protrusion 15 is embedded in the second limiting groove 52 to prevent the battery holder 1 from shaking inside the shell 5, especially the displacement shaking along the Y direction.

[0050] Optionally, refer to Figure 1 The battery cell support 1 includes four side frames 10 connected end to end, and the four side frames 10 are arranged to form a receiving cavity for fixing the battery cell 2.

[0051] Specifically, if Figure 1 As shown, the battery holder 1 includes four side frames 10 distributed on the front, back, left and right sides, and the four side frames 10 are connected end to end to form a receiving cavity, which is used to fix the battery 2, and specifically can fix one, two or more battery cells 2. The four side frames 10 surround the receiving cavity in the shape of a square, which matches the structure of the soft-pack battery used in this embodiment.

[0052] Optionally, refer to Figure 1 An annular flange 102 is provided inside the accommodating cavity, and the annular flange 102 is used to separate at least two adjacent battery cells 2 in the accommodating cavity.

[0053] Specifically, if Figure 1 As shown, the inner wall of the accommodating cavity, i.e., the side frame 10, is provided with an annular flange 102 for fixing the edge of the battery cell 2. Each annular flange 102 separates the battery cell holder 1 into two parts, each part is used to place a battery cell 2, and the annular flange 102 separates two adjacent upper and lower battery cells 2 to prevent the battery cell 2 from shaking in the battery cell holder 1. Therefore, the requirement that at least two battery cells 2 can be fixed in the same battery cell holder 1 is achieved by providing the annular flange 102.

[0054] Optionally, refer to Figure 1At least one side frame 10 is provided with at least two connecting ears 11 along the extension direction, and each connecting ear 11 is correspondingly provided with a buckle 12.

[0055] Specifically, if Figure 1 As shown, at least one side frame 10 is provided with at least two connecting ears 11 along the extension direction. The more the number is set, the stronger the connection reliability between the battery holders 1 is, but the complexity of the structure is increased. In this embodiment, two connecting ears 11 are respectively provided on the side frames 10 on the left and right sides, and each connecting ear 11 is correspondingly provided with a buckle 12 and two first limiting protrusions 13. The connecting ears 11 provided on each side frame 10 are distributed along the X direction. The connecting ears 11 at corresponding positions on the left and right sides are relatively arranged to ensure the force balance during assembly connection, and are not prone to shaking and displacement.

[0056] Optionally, refer to Figure 1 The side frame 10 of the battery cell support 1 is provided with heat dissipation holes 16 .

[0057] Specifically, if Figure 1 As shown, a heat dissipation hole 16 is provided on at least one of the four side frames 10 on the front, rear, left and right sides. The heat dissipation hole 16 is connected to the accommodating cavity of the battery cell holder 1, and is used to discharge the heat generated during the operation of the battery cell 2 to prevent the battery cell 2 from overheating during operation. In order to ensure the uniformity of heat dissipation and exhaust, the present embodiment is provided with heat dissipation holes 16 on the four side frames 10 on the front, rear, left and right sides, wherein the heat dissipation holes 16 on the side frames 10 on the left and right sides extend along the X direction, and the heat dissipation holes 16 on the side frames 10 on the front and rear sides extend along the Y direction to adapt to the structure of the side frame 10 and expand the heat dissipation area. The heat dissipation holes 16 on each side frame 10 are designed as a segmented structure, which can meet the heat dissipation requirements while avoiding affecting the structural strength of the side frame 10.

[0058] Optionally, refer to Figure 1 , wherein two opposite side frames 10 are both extended with fixed ridges 101, and a space for fixing the collection board is formed between the two opposite fixed ridges 101.

[0059] Specifically, if Figure 1As shown, the side frames 10 on the left and right sides of this embodiment are provided with fixed ridges 101 extending along the X direction, and the fixed ridges 101 on the left and right sides provide space for fixing the acquisition board, that is, the acquisition board can be clamped and fixed between the fixed ridges 101 on the left and right sides. The main body of the acquisition board is a PCB (Printed Circuit Board), on which a control device is integrated, and it has overcharge, over-discharge, overcurrent and short-circuit protection functions. When the battery cell 2 is fixed in the accommodating cavity in the battery cell holder 1, the pole ear 21 extends from the pole ear connection port 17 of the battery cell holder 1, and is welded to the acquisition board through a nickel sheet to form a current path between the battery pack and the acquisition board, so that the acquisition board can collect and monitor the status and parameters of the battery pack.

[0060] Reference Figure 4 and Figure 5 The embodiment of the utility model further provides a battery pack, comprising at least two battery cells 2 and a battery cell holder 1 as described above; at least one battery cell 2 is fixed in each battery cell holder 1.

[0061] Specifically, if Figure 4 and Figure 5 As shown, the battery pack of this embodiment adopts a lithium-ion battery pack. It includes at least two battery modules, that is, at least two battery cells 2 and at least two battery cell holders 1, and at least one battery cell 2 is fixed in each battery cell holder 1. Different battery modules are stacked up and down, and adjacent battery cell holders 1 are connected to the buckle 12 through the through hole 111 on the connecting ear 11, avoiding the need to set an additional connection structure outside the battery cell holder 1, improving the utilization rate of the battery cell holder 1, reducing the complexity of the battery pack structure, and helping to increase the battery pack capacity. The battery pack provided in this embodiment is mainly used in electric vehicles.

[0062] Optionally, refer to Figure 2 and Figure 5 The battery pack further includes a flame retardant plate 4 ; the flame retardant plate 4 is disposed between two adjacent battery cell brackets 1 .

[0063] Specifically, if Figure 2 and Figure 5 As shown, when multiple battery modules are modularly assembled to form a battery pack, a flame retardant plate 4 is provided between the cell holders 1 of two adjacent battery modules. At the same time, the flame retardant plate 4 isolates the cells 2 of different battery modules to avoid spontaneous combustion or leakage accidents caused by high temperature or voltage breakdown.

[0064] Optionally, refer to Figure 3 and Figure 4 The battery pack also includes a heat conducting plate 3, and at least two of the battery cells 2 distributed along the thickness direction are fixed in at least one of the battery cell holders 1; the heat conducting plate 3 is arranged in the battery cell holder 1 and is located between at least two of the battery cells 2.

[0065] Specifically, if Figure 3 and Figure 4 As shown, when at least two battery cells 2 are fixed in a battery cell holder 1 along the thickness direction, a heat conducting plate 3 is arranged between two adjacent battery cells 2, and the heat conducting plate 3 is aligned with the heat dissipation holes 16 of the battery cell holder 1 to discharge the heat generated by the battery cells 2 during operation to the outside.

[0066] In some embodiments, the battery pack is assembled using the following steps:

[0067] Step 1: fix the heat conducting plate 3 at the middle position of the accommodating cavity of the battery cell support 1.

[0068] Step 2: install one of the battery cells 2 in the accommodating cavity at the upper part of the heat conducting plate 3, and install the other battery cell 2 in the accommodating cavity at the lower part of the heat conducting plate 3 to form a battery module. Repeat steps 1 and 2 to assemble multiple battery modules.

[0069] Step 3: embed the connecting ear 11 on the upper part of one of the battery holders 1 between the two first limiting protrusions 13 of the other upper battery holder 1, and at the same time, the through hole 111 of the connecting ear 11 is plugged and fixed with the buckle 12 of the upper battery holder 1 to connect the two battery holders 1. Repeat step 3 to connect multiple battery modules to form a battery pack.

[0070] Optionally, refer to Figure 1 , Figure 6 and Figure 7 The battery pack further includes a shell 5 , and at least two of the battery cell holders 1 abut against the inner wall of the shell 5 .

[0071] Specifically, in the related art, a glue filling operation is usually performed between the battery holder 1 and the shell 5. This method is not conducive to ensuring that the battery holder 1 and the shell 5 remain relatively still during the vibration process. Figure 1 , Figure 6 and Figure 7 As shown, the first limiting protrusion 13, the second limiting protrusion 14 and the fourth limiting protrusion arranged on the outer side of the battery holder 1 of this embodiment abut against the inner wall of the shell 5, thereby improving the stability of the assembly between the battery holder 1 and the shell 5. Specifically, the third limiting protrusion 51 of the inner wall of the shell 5 is embedded in the first limiting groove 141 of the battery holder 1, and the fourth limiting protrusion 15 of the battery holder 1 is embedded in the second limiting groove 52 of the inner wall of the shell 5.

[0072] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0073] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the utility model, all of which are within the protection of the utility model.

Claims

1. A battery cell support, characterized in that: A protruding connection ear is provided on the first side of the battery holder, and a buckle is provided near the second side of the battery holder; The connecting ear is provided with a through hole, and the through hole is used to be plugged and fixed with a buckle of another battery cell bracket close to the first side; The buckle is used for plugging and fixing with a through hole of another battery cell bracket close to the second side, and the first side is opposite to the second side.

2. The battery cell support according to claim 1, characterized in that: The battery cell support is also provided with at least two first limiting protrusions; The buckle is located between at least two of the first limiting protrusions, and along the extension direction of the first limiting protrusion, the two sides of the connecting ear are aligned with one of the first limiting protrusions respectively, and the connecting ear is used to be embedded between at least two first limiting protrusions of another battery cell bracket close to the first side.

3. The battery cell support according to claim 2, characterized in that: At least one second limiting protrusion is provided on one side of the battery cell support; At least one second limiting protrusion and at least one first limiting protrusion are spaced apart to form a first limiting groove, and the first limiting groove is used to fix the third limiting protrusion on the inner wall of the shell.

4. The battery cell support according to claim 3, characterized in that: The other adjacent side of the battery support is further provided with a fourth limiting protrusion or one of the second limiting grooves, which is used to fix the other of the fourth limiting protrusion or the second limiting groove on the inner wall of the shell.

5. The battery cell support according to claim 1, characterized in that: The battery cell support comprises four side frames connected end to end, and the four side frames are arranged to form a receiving cavity for fixing the battery cell.

6. The battery cell support according to claim 5, characterized in that: An annular flange is arranged inside the accommodating cavity, and the annular flange is used to separate at least two adjacent battery cells in the accommodating cavity.

7. The battery cell support according to claim 5, characterized in that: At least one side frame is provided with at least two connecting ears along the extension direction, and one buckle is correspondingly provided at each connecting ear.

8. The battery cell support according to claim 5, characterized in that: The side frame of the battery support is provided with heat dissipation holes.

9. The battery cell support according to claim 5, characterized in that: Two opposite side frames are each extended with fixed ridges, and a space for fixing the collection plate is formed between the two opposite fixed ridges.

10. A battery pack, characterized in that: Comprising at least two battery cells and at least two battery cell brackets according to any one of claims 1 to 9; At least one battery cell is fixed in each battery cell bracket.

11. The battery pack according to claim 10, characterized in that: The battery pack also includes a flame retardant plate; The flame retardant plate is arranged between two adjacent battery core brackets.

12. The battery pack according to claim 10, characterized in that: The battery pack further comprises a heat conducting plate, and at least two of the battery cells distributed along the thickness direction are fixed in at least one of the battery cell holders; The heat conducting plate is arranged in the battery core support and is located between at least two of the battery cores.

13. The battery pack according to claim 10, characterized in that: The battery pack further comprises a shell, and at least two of the battery cell holders are in contact with an inner wall of the shell.

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