Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack, which comprises end part brackets, a plurality of connecting rods and a plurality of connecting rods, the buffering piece is arranged in the end support; the buffering piece is connected with the end support, so that the buffering piece and the end support form a suspension structure, and the buffering piece and the concave part are correspondingly arranged. According to the embodiment of the utility model, the buffer piece is suspended, so that the side edge, connected with the end part bracket, of the buffer piece is used as a positioning reference, and other unconnected side edges form an adjustable positioning surface, and the positioning range is relatively large, so that the influence of over-positioning on the assembly of the battery is avoided. The buffer part is suspended, so that the buffer part has certain elasticity and can be deformed under certain pressure, and therefore, self-adaptive adjustment is performed through the elasticity of the buffer part, the manufacturing tolerance can be counteracted to a certain extent, the interference problem can be avoided to a certain extent, and excessive stress of partial positions of the battery can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] Currently, battery packs contain multiple battery cells in a battery box. To increase battery density within the pack, these cells are typically stacked together. The batteries have flanges, which, when installed, come into direct contact with the bottom of the box, preventing them from being stably secured. Therefore, additional mounting brackets are required to secure the battery cells.

[0003] When stacking battery cells, in order to further improve the battery density, a recessed portion is provided on the outer surface of each battery cell. The recessed portion is used to accommodate a terminal of another battery cell during stacking.

[0004] Due to manufacturing tolerances, although the fixing bracket has an assembly gap reserved at the position corresponding to the recessed portion, the fixing bracket and the battery cell cannot be installed quickly during assembly, resulting in low assembly efficiency. At the same time, it will cause excessive stress in some parts of the battery, which can easily damage the battery. Utility Model Content

[0005] In view of this, the present invention provides a battery pack to solve the problems of low assembly efficiency and excessive stress in some parts of the battery.

[0006] In a first aspect, the present invention provides a battery pack, comprising:

[0007] A plurality of batteries, each battery being provided with a flange, a terminal, and a recess; the terminal and the recess being provided at ends of the battery along the length of the battery; the terminal being located on a first end face of the battery, and the recess being provided on a second end face of the battery; the first end face and the second end face being opposite end faces of the battery; when two adjacent batteries are stacked, the recess of one battery can accommodate the terminal of the other battery;

[0008] An end bracket is provided on each battery and connected to the flange edge of each battery;

[0009] A buffer member is elastic and connected to the end bracket, wherein the accommodating cavity formed by the buffer member and the end bracket completely encloses the flange edge and the recessed portion;

[0010] The buffer and the end bracket form a suspension structure, and the buffer is arranged corresponding to the recessed portion; in the length direction of the battery, the projection of the buffer covers the recessed portion, and a gap is provided between the recessed portion and the buffer.

[0011] Beneficial Effects: The present invention utilizes end brackets. Once the end brackets and batteries are installed, the end brackets increase the contact area between the batteries and the bottom of the battery box, thereby facilitating battery insertion and assembly. Furthermore, the buffer is suspended, allowing the side where the buffer connects to the end bracket to serve as the positioning reference. The remaining unconnected sides form adjustable positioning surfaces, resulting in a wide positioning range and preventing over-positioning from affecting battery assembly.

[0012] Furthermore, the buffer has a certain degree of elasticity and is suspended in the air. After the battery contacts the buffer and is installed in the end bracket, the buffer can accommodate the battery's installation position within a certain range. Even if there are manufacturing tolerances between the battery and the end bracket, the buffer can deform under a certain pressure, thereby adjusting through the buffer's elasticity and self-adaptation, offsetting the manufacturing tolerance to a certain extent and avoiding interference issues. This also allows the buffer and end bracket to be in close contact with the battery, eliminating the problem of excessive stress in certain parts of the battery. At the same time, there is no need to reserve assembly clearance on the end bracket for manufacturing tolerances, which can save a certain amount of internal space in the battery box, thereby improving the space utilization inside the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the internal structure of a battery pack according to an embodiment of the present utility model;

[0015] Figure 2 For Figure 1 A schematic diagram of the structure of the battery end is exposed on the basis;

[0016] Figure 3 for Figure 2 Enlarged stereogram of part A;

[0017] Figure 4 This is a schematic diagram of the structure of the end bracket and battery installation;

[0018] Figure 5A schematic diagram of the structure of a buffer member with a spacing groove;

[0019] Figure 6 Schematic diagram of the structure of the end bracket and the buffer;

[0020] Figure 7 for Figure 6 An enlarged schematic diagram of part B;

[0021] Figure 8 is a schematic diagram of the length of the buffer;

[0022] Figure 9 It is a schematic diagram of the structure of the end bracket and the buffer in another direction.

[0023] Description of reference numerals:

[0024] 1. Battery; 11. Terminal; 12. Recess; 2. End bracket; 21. Opening; 22. Mounting side; 23. Mounting frame; 3. Conductive bar; 4. Buffer; 41. Spacer groove; 5. Empty groove; 6. Diaphragm. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components; wireless connections or wired connections. A person skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] At present, a battery box of a battery pack is equipped with multiple battery cells. In order to increase the battery density in the battery pack, multiple battery cells are usually stacked together. This embodiment is mainly applied to OS batteries. OS batteries are provided with flange edges. After the battery cells are assembled into the box, the flange edges are in direct contact with the bottom of the battery box, making it impossible for the battery cells to be stably fixed to the battery box. Therefore, an additional fixing bracket is required to fix the battery cells. When stacking the battery cells, in order to further increase the battery density, a recessed portion is provided on the outer surface of each battery cell. The recessed portion is used to accommodate the pole of another battery cell when stacking.

[0030] Due to manufacturing tolerances, although the fixing bracket has an assembly gap reserved at the position corresponding to the recessed portion, the fixing bracket and the battery cell cannot be installed quickly during assembly, resulting in low assembly efficiency. At the same time, it will cause excessive stress in some parts of the battery, which can easily damage the battery.

[0031] In view of this, the present invention provides a battery pack to solve the problems of low assembly efficiency and excessive stress at some positions of the battery 1 .

[0032] The following combination Figures 1 to 9 , describing the embodiments of the present utility model.

[0033] According to an embodiment of the present invention, on one hand, a battery pack is provided. The battery pack includes: a battery 1 , an end bracket 2 , and a buffer 4 .

[0034] Specifically, in this embodiment, multiple batteries 1 can be arranged in the accommodating cavity inside the battery box. This embodiment is mainly applied to OS batteries, and the shape of the OS battery itself determines that each battery 1 is provided with a flange edge, a pole 11 and a recessed portion 12.

[0035] Furthermore, if Figure 3 and Figure 4As shown, the pole 11 and the recess 12 are both provided at the end of the battery 1. The pole 11 is located on the first end face of the battery 1, and the recess 12 is provided on the second end face of the battery 1. The first end face and the second end face are two opposite end faces of the battery 1. When the pole 11 and the recess 12 are both at the top position of the battery 1, the recess 12 is at the front side of the battery 1, and the pole 11 is at the back side of the battery 1; similarly, when the pole 11 and the recess 12 are both at the bottom position of the battery 1, the recess 12 is at the back side of the battery 1, and the pole 11 is at the front side of the battery 1.

[0036] Furthermore, when two adjacent batteries 1 are in a stacked position, the recess 12 of one battery 1 can accommodate the terminal of the other battery 1. Figure 1 and Figure 2 As shown, during the stacking process of the batteries 1 , the recessed portion 12 of the preceding battery 1 is used to accommodate the pole 11 of the succeeding battery 1 , so that during the stacking process of the batteries 1 , the positioning positions of two adjacent batteries 1 are always close to each other.

[0037] Furthermore, in this embodiment, Figure 3 and Figure 4 As shown, the end bracket 2 is correspondingly provided on each battery 1, and the end bracket 2 is connected to the flange edge. By providing the end bracket 2, the battery 1 can be conveniently placed at the bottom of the battery box. As for the connection method, it can be a fixed connection, such as connection by welding, bonding, etc.; it can also be a movable connection, such as connection by snap connection, screw holes, etc. Of course, this embodiment is only an example of the connection method, but it is not limited to this. Those skilled in the art can make changes according to actual conditions as long as the same technical effect can be achieved.

[0038] Moreover, compared with the arrangement of the conductive bar 3 in the current battery pack, Figure 1 and Figure 2 As shown, in this embodiment, the conductive bar 3 can be arranged along the height direction of the battery 1 and fixed on the end bracket 2, so that the conductive bar 3 directly connects two adjacent batteries 1, thereby avoiding the problem of the conductive bar 3 easily falling off during installation.

[0039] Furthermore, in this embodiment, Figures 5 to 9 As shown, the buffer member 4 is arranged in the end bracket 2, the buffer member 4 is elastic, and the buffer member is connected to the end bracket 2. The buffer member 4 and the end bracket 2 are surrounded to form an accommodating cavity, which completely wraps the flange edge and the recessed portion 12.

[0040] Furthermore, the buffer 4 forms a suspension structure with the end bracket 2, allowing the buffer 4 to swing within a certain range. Furthermore, the buffer 4 is positioned corresponding to the recess 12. That is, along the length of the battery 1, the projection of the buffer 4 overlaps the recess 12, allowing the buffer 4 to wrap around the recess 12. At the same time, a gap is provided between the recess 12 and the buffer 4, allowing the buffer 4 to accommodate the installation position of the battery 1 within a certain range. Even if there are manufacturing tolerances between the battery 1 and the end bracket 2, the buffer 4 can deform under a certain pressure, thereby adjusting through the elastic self-adaptation of the buffer 4, offsetting manufacturing tolerances to a certain extent and avoiding interference issues.

[0041] In this embodiment, the buffer member 4 can be made of a material with a certain degree of elasticity, such as metal, plastic, etc., which can be slightly bent to a certain extent. Of course, this embodiment is only an example of the material of the buffer member 4, and is not limited to this. Those skilled in the art can change it according to actual conditions as long as it can achieve the same technical effect.

[0042] With this arrangement, the present embodiment of the present invention utilizes the end bracket 2. Once the end bracket 2 and battery 1 are mounted, the end bracket 2 increases the contact area between the battery 1 and the bottom of the battery box, thereby facilitating the insertion and assembly of the battery 1. Furthermore, the buffer 4 is suspended, allowing the side where the buffer 4 connects to the end bracket 2 to serve as the positioning reference. The other unconnected sides form an adjustable positioning surface, resulting in a larger positioning range and preventing over-positioning from affecting the assembly of the battery 1.

[0043] Furthermore, the buffer 4 has a certain elasticity, and the buffer 4 is suspended. After the battery 1 contacts the buffer 4 and is installed in the end bracket 2, the buffer 4 can accommodate the installation position of the battery 1 within a certain range. Even if there is a manufacturing tolerance between the battery 1 and the end bracket 2, the buffer 4 can be deformed under a certain pressure, so that the elastic self-adaptation of the buffer 4 can be adjusted to offset the manufacturing tolerance to a certain extent and avoid the interference problem. It is also possible to make the buffer 4 and the end bracket 2 in close contact with the battery 1, and there is no problem of excessive stress in some parts of the battery 1. At the same time, there is no need to reserve an assembly gap on the end bracket 2 for manufacturing tolerances, which can save a certain amount of internal space in the battery box, thereby improving the space utilization inside the battery box. It is preliminarily estimated that the space saved may be around 2mm, which can be used to further contribute to the battery 1 to improve the utilization of the electrode.

[0044] Moreover, when the buffer member 4 is disposed at the lower end face of the battery 1, the buffer member 4 will be blocked by the thermally conductive structural adhesive in the battery box, and the difficulty of opening the explosion-proof valve will be higher than that of the upper end face of the battery 1. Thus, the upper end face of the battery 1 is more likely to open the valve, while ensuring that the lower end face of the battery 1 is not easily opened, reducing the risk of arc formation due to deposits to a certain extent.

[0045] Further, in an optional embodiment, as Figures 5 to 9 shown, the end bracket 2 is formed with an installation frame 23, and the installation frame 23 may be in a rectangular structure or other structures convenient for installation. The installation frame 23 is provided with an opening 21, such that the overall installation frame 23 is in a "C" - shaped structure, and the opening 21 is adapted for the battery 1 to be inserted. During actual application, the battery 1 has a first position where it is inserted into the opening 21 and a second position where it is disengaged from the opening 21. And, in the first position, the installation frame 23 is snap - connected to the flange edge.

[0046] For the snap - connection method, it can be snap - connected through a snap - fastener and a slot, or through a plug and a socket. Of course, this embodiment is only an example of the snap - connection method, but it is not limited thereto. Those skilled in the art can make changes according to actual situations as long as the same technical effects can be achieved.

[0047] Further, in an optional embodiment, as Figure 5 shown, the end bracket 2 is provided with an installation side 22 at a position opposite to the opening 21, and the buffer member 4 is connected to the installation side 22 of the installation frame 23 to form the suspension structure. Since the end of the battery 1 is provided with a recess 12, and the opening 21 is located on the side of the end bracket 2 close to the recess 12, therefore, in order to facilitate the contact between the buffer member 4 and the recess 12, the buffer member 4 can be directly connected to it.

[0048] Meanwhile, since one side of the buffer member 4 close to the recess 12 can deform under pressure, when the buffer member 4 contacts the recess 12, the deformed part can directly absorb the manufacturing tolerance of the battery 1. And the position where the buffer member 4 is connected to the installation side 22 is far from the recess 12, which can increase the deformation degree of the buffer member 4 to a certain extent, so that the overall end bracket 2 can better accommodate the battery 1 and can more easily assemble the battery 1.

[0049] Further, in an optional embodiment, as Figure 4 [[ID=ST]]shown, empty slots 5 are provided between the side edges of the installation frame 23 on both sides of the opening 21 and the buffer member 4.

[0050] With such an arrangement, in actual application, when the battery 1 is assembled to the end bracket 2, it is inserted inward from the opening 21 into the mounting frame 23. After the recessed portion 12 of the battery 1 contacts the buffer 4, the buffer 4 is gently pressed inward. Since there is an empty groove 5 between the buffer 4 and the mounting frame 23, the buffer 4 can move independently. Then, the buffer 4 can be slightly bent away from the battery 1 under the action of pressure, thereby completing the assembly process.

[0051] Furthermore, in an optional embodiment, as Figures 5 to 8 As shown, a plurality of spacing grooves 41 are formed on the buffer member 4 along the width direction of the opening 21 , and the extending direction of the spacing grooves 41 is parallel to the empty groove 5 .

[0052] This arrangement, by providing multiple spacing grooves 41 on the buffer member 4, further enhances the bending ability of the buffer member 4, improves the overall ability of the end bracket 2 to offset manufacturing tolerances, and further avoids interference issues. At the same time, it also allows the buffer member 4 and the end bracket 2 to maintain close contact with the battery 1, further alleviating the problem of excessive stress in certain locations of the battery 1.

[0053] Furthermore, in an optional embodiment, as Figure 7 As shown, the width of the empty groove 5 and the spacing groove 41 is D, and D is between 1 mm and 25 mm.

[0054] By setting the slot width within a certain range, this embodiment can prevent the slot widths of the empty slots 5 and the spacing slots 41 from being too large, thereby affecting the overall structural strength of the end bracket 2 and thus reducing the support performance for the battery 1. It can also prevent the slot width from being too large, thereby exposing the battery 1 shell excessively and affecting the insulation of the battery 1.

[0055] Furthermore, in an optional embodiment, as Figure 1 and Figure 2 As shown, along the width direction of the opening 21 , the length of the buffer member 4 is L, and L is between 40 mm and 80 mm.

[0056] This embodiment sets the length of the buffer member 4 within a certain range, thereby ensuring the overall structural strength of the end bracket 2 without affecting the supporting strength of the battery 1, thereby ensuring that the buffer member 4 can play a certain buffering role.

[0057] Furthermore, in an optional embodiment, the number of the spacing grooves 41 is no more than four.

[0058] By controlling the number of spacing grooves 41 within a certain range, this embodiment can prevent an excessive number of spacing grooves 41 from affecting the overall structural strength of the end bracket 2, thereby ensuring that the buffer member 4 can provide a certain cushioning effect. Furthermore, an excessive number of spacing grooves 41 not only reduces the overall structural strength of the end bracket 2, but also increases the difficulty of the injection molding process.

[0059] Furthermore, in an optional embodiment, as Figure 3 As shown, the battery 1 is also provided with a diaphragm 6, and the diaphragm 6 is laid on the battery 1. In order to ensure the insulation performance of adjacent batteries 1, the width of the diaphragm 6 needs to be greater than the width of the entire battery 1. Therefore, the excess part of the diaphragm 6 along the width direction of the battery 1 is the burr of the diaphragm 6. The burr has a certain hardness and can be directly accommodated in the empty slot 5, which can avoid affecting other structures in the battery box.

[0060] Furthermore, in an optional embodiment, as Figure 3 and Figure 5 As shown, the width of the opening 21 matches the height of the battery 1, and the slots 5 are located at both ends of the height direction of the battery 1. This arrangement allows the buffer member 4 to face the recessed portion 12 of the battery 1, thereby better securing the battery 1.

[0061] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: A plurality of batteries (1), each battery (1) is provided with a flange edge, a pole (11) and a recessed portion (12); along the length direction of the battery (1), the pole (11) and the recessed portion (12) are both provided at the end of the battery (1); the pole (11) is located on the first end face of the battery (1), and the recessed portion (12) is provided on the second end face of the battery (1); the first end face and the second end face are two end faces opposite to each other of the battery (1); two adjacent batteries (1) are in a stacked position, and the recessed portion (12) of one battery (1) can accommodate the pole of the other battery (1); An end bracket (2) is provided on each battery (1) and connected to a flange edge of each battery (1); A buffer member (4) is elastic and connected to the end bracket (2); the accommodating cavity formed by the buffer member (4) and the end bracket (2) completely encloses the flange edge and the recessed portion (12); The buffer (4) and the end bracket (2) form a suspension structure, and the buffer (4) is arranged corresponding to the recessed portion (12); in the length direction of the battery (1), the projection of the buffer (4) covers the recessed portion (12), and a gap is provided between the recessed portion (12) and the buffer (4).

2. The battery pack according to claim 1, wherein: The end bracket (2) is formed with a mounting frame (23), and the mounting frame (23) is provided with an opening (21), and the opening (21) is suitable for the battery (1) to be inserted; the battery (1) has a first position of being inserted into the opening (21) and a second position of being detached from the opening (21); in the first position, the mounting frame (23) is engaged with the flange edge.

3. The battery pack according to claim 2, wherein: The end bracket (2) is provided with a mounting side (22), and the mounting side (22) is arranged opposite to the opening (21); the buffer member (4) is connected to the mounting side (22) of the mounting frame (23) to form the suspension structure.

4. The battery pack according to claim 3, wherein: Empty grooves (5) are provided between the side edges of the mounting frame (23) on both sides of the opening (21) and the buffer member (4).

5. The battery pack according to claim 4, wherein: Along the width direction of the opening (21), a plurality of spacing grooves (41) are provided on the buffer member (4), and the extending direction of the spacing grooves (41) is parallel to the empty groove (5).

6. The battery pack according to claim 5, characterized in that The slot width of the empty slot (5) and the spacing slot (41) is D, and D is between 1 mm and 25 mm.

7. The battery pack according to claim 6, wherein: Along the width direction of the opening (21), the length of the buffer member (4) is L, and L is between 40 mm and 80 mm.

8. The battery pack according to any one of claims 5 to 7, characterized in that: The number of the spacing grooves (41) is no more than 4.

9. The battery pack according to any one of claims 4 to 7, characterized in that: The battery (1) is also provided with a diaphragm (6), which is laid on the battery (1); and the flash edge of the diaphragm (6) is accommodated in the empty groove (5).

10. The battery pack according to any one of claims 4 to 7, characterized in that: The width of the opening (21) is adapted to the height of the battery (1), and the empty slots (5) are located at both ends of the battery (1) in the height direction.

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