Fixing support and battery pack

Abstract

The utility model relates to the technical field of cylindrical batteries, in particular to a fixing support and a battery pack, and a shell is in a cylindrical shape extending in the first direction. The fixing support comprises a support assembly, the support assembly comprises a support body, a connecting part and a bonding part, the support body is a polygonal cylinder extending in the first direction, and the support body is provided with a slot for fixing the battery cell group. The connecting part is fixedly arranged on the edge of the support body, the connecting part and the connecting part extend in the first direction, and a glue containing groove extending in the first direction is formed in the outer side wall of the connecting part. When the fixing support is arranged on the shell, the inner wall of the shell is attached to the connecting part, the side, facing the shell, of the glue containing groove is open, and the glue containing groove is filled with the bonding part so as to bond the connecting part and the shell. According to the fixing bracket and the battery pack provided by the invention, the flowability of the insulating cooling liquid in the battery pack and the connection stability between the battery cell group and the shell are improved.

Description

Technical Field

[0001] This application relates to the field of cylindrical battery technology, and in particular to a mounting bracket and battery pack. Background Technology

[0002] Submersible cooled battery packs completely immerse the energy storage batteries in a special insulating coolant. Heat exchange occurs through direct contact between the coolant and the battery, rapidly absorbing the heat generated during charging and discharging and transferring it to an external circulation system for cooling. This technology ensures the batteries operate safely and efficiently.

[0003] Cylindrical batteries, also known as cylindrical lithium batteries, are widely used in electric vehicles, power banks, drones, solar lights, lawn lights, backup power, power tools, and toy models due to their advantages such as high capacity, long cycle life, and wide operating temperature range.

[0004] However, the circular outer surface of cylindrical batteries makes them difficult to directly fix onto flat or specifically shaped structures, requiring additional fixing devices or structures to accommodate their shape. These additional fixing devices not only affect the flow of insulating coolant within the submerged cooling battery pack, but also exhibit poor stability and are easily damaged under vibration and impact in dynamic environments. Utility Model Content

[0005] The purpose of this application is to provide a fixing bracket and battery pack to address, to some extent, the technical problems existing in the prior art where the circular outer surface of cylindrical batteries makes them difficult to directly fix onto flat or specifically shaped structures, requiring additional fixing devices or structures to accommodate their shape. Furthermore, these additional fixing devices not only affect the flow of insulating coolant within the submerged cooling battery pack, but also exhibit poor stability and are prone to damage under vibration and impact in dynamic environments.

[0006] According to a first aspect of this application, a fixing bracket is provided for fixing a battery cell assembly to a battery pack housing, the housing being cylindrical and extending along a first direction;

[0007] The fixing bracket includes a bracket assembly, which includes a bracket body, a connecting part, and an adhesive part. The bracket body is a polygonal column extending along the first direction, and the bracket body is provided with a slot for fixing the battery cell assembly.

[0008] The connecting part is fixedly disposed on the side edge of the bracket body and extends along the first direction with the connecting part. The outer side wall of the connecting part is provided with an adhesive groove extending along the first direction.

[0009] With the fixed bracket installed on the housing, the inner wall of the housing is fitted to the connecting part, the side of the adhesive groove facing the housing is open, and the adhesive part is filled with the adhesive groove to bond the connecting part and the housing.

[0010] Preferably, when the fixed bracket is disposed on the housing, an adhesive gap is formed between the side wall of the housing and the connecting part, and the adhesive part can be injected into the adhesive gap through the adhesive groove.

[0011] Preferably, the connecting part includes symmetrical legs, and the symmetrical legs include a first support rib and a second support rib;

[0012] The first support rib and the second support rib are respectively disposed on both sides of the edge;

[0013] The first support rib and the second support rib are symmetrically arranged about the edge.

[0014] The first support rib and the second support rib are arranged together to form the adhesive groove.

[0015] Preferably, the connecting portion includes a limiting rib that extends radially along the housing, and the adhesive groove is a recess disposed on the outer side wall of the limiting rib.

[0016] Preferably, the adhesive gap is 0.25mm to 2.0mm;

[0017] And / or, the amount of the adhesive portion injected is 1 to 1.3 times the volume of the adhesive reservoir.

[0018] Preferably, the battery cell assembly extends along the first direction;

[0019] The fixing bracket includes a first fixing member and a second fixing member, both of which are bracket assemblies. The bracket body of the first fixing member is provided with a first slot, and the bracket body of the second fixing member is provided with a second slot. A portion of the battery cell assembly is inserted into the first slot, and another portion of the battery cell assembly is inserted into the second slot.

[0020] According to a second aspect of this application, a battery pack is provided, including the above-mentioned cell assembly, the above-mentioned housing, and the fixing bracket described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of the fixing bracket, which will not be repeated here.

[0021] Preferably, the battery pack includes a plurality of cell groups and a plurality of fixing brackets, the plurality of fixing brackets being stacked along the first direction, and each fixing bracket corresponding to one cell group.

[0022] Preferably, each of the battery cell groups includes a plurality of battery cells, and each battery cell has a first polarity and a second polarity respectively at both ends in a first direction, and both the first polarity and the second polarity of the battery cell can be exposed by the fixing bracket.

[0023] The battery pack also includes a first busbar and a second busbar, with the first busbar and the second busbar respectively provided at both ends of each of the fixed brackets.

[0024] Preferably, it further includes a flexible acquisition plate, which is disposed at the end of the first busbar facing away from the fixed bracket and connected to the first busbar;

[0025] Alternatively, the flexible acquisition plate is disposed at the end of the second busbar opposite to the fixed bracket and is connected to the second busbar.

[0026] Compared with the prior art, the beneficial effects of this application are as follows:

[0027] The fixing bracket provided in this application, on the one hand, sets the bracket body for fixing the battery cell pack as a polygonal column extending along a first direction, and sets a connecting part for connecting the housing and the bracket body at the edge of the bracket body. In this way, the gap formed by the shape difference between the polygonal column and the cylindrical housing, as well as the gap between the housing and the bracket body supported by the connecting part, effectively improves the flow of insulating coolant in the battery pack. On the other hand, by setting the connecting part to fit the inner wall of the housing, the adhesive part is filled with a molten adhesive groove to realize the connection between the fixing bracket and the battery pack, effectively increasing the connection area between the fixing bracket and the housing, and improving the connection stability between the battery cell pack and the housing.

[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is an exploded structural diagram of the battery pack provided in an embodiment of this application;

[0031] Figure 2 This is a front view structural diagram of the battery pack provided in an embodiment of this application;

[0032] Figure 3 This is an isometric structural diagram of the battery pack provided in an embodiment of this application;

[0033] Figure 4 This is another isometric structural schematic diagram of the battery pack provided in the embodiments of this application;

[0034] Figure 5 This is another isometric structural schematic diagram of the battery pack provided in an embodiment of this application.

[0035] Figure label:

[0036] 10-Support body; 101-First fixing component; 102-Second fixing component; 11-Symmetrical support leg; 111-First support rib; 112-Second support rib; 12-Limiting rib; 13-Glue tank; 2-Battery cell assembly; 31-First busbar; 32-Second busbar; 4-Flexible acquisition board; 5-Housing shell;

[0037] F1 - First direction; F2 - Second direction; G - Gravity direction. Detailed Implementation

[0038] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0039] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0040] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The following reference Figures 1 to 5 This application describes a mounting bracket and battery pack according to some embodiments.

[0044] See Figures 1 to 5 As shown, an embodiment of the first aspect of this application provides a fixing bracket for fixing a battery cell assembly 2 to a battery pack housing 5. The housing 5 is cylindrical and extends along a first direction F1. The fixing bracket includes a bracket assembly, which includes a bracket body 10, a connecting portion, and an adhesive portion. The bracket body 10 is a polygonal column extending along the first direction F1, and the bracket body 10 is provided with a slot for fixing the battery cell assembly 2. The connecting portion is fixedly disposed on the edge of the bracket body 10 and extends along the first direction F1. The outer side wall of the connecting portion is provided with an adhesive groove 13 extending along the first direction F1. When the fixing bracket is disposed on the housing 5, the inner wall of the housing 5 is fitted to the connecting portion, and the side of the adhesive groove 13 facing the housing 5 is open. The adhesive portion fills the adhesive groove 13 to bond the connecting portion and the housing 5.

[0045] According to the fixing bracket provided by the above technical features, on the one hand, the bracket body 10 for fixing the battery cell pack 2 is set as a polygonal column extending along the first direction F1, and a connecting part for connecting the housing 5 and the bracket body 10 is provided at the edge of the bracket body 10. In this way, the gap formed by the shape difference between the polygonal column and the cylindrical housing 5, as well as the gap between the housing 5 and the bracket body 10 supported by the connecting part, effectively improves the fluidity of the insulating coolant in the battery pack. On the other hand, by providing a connecting part attached to the inner wall of the housing 5, the adhesive part is filled with the adhesive groove 13, thereby realizing the connection between the fixing bracket and the battery pack, effectively increasing the connection area between the fixing bracket and the housing 5, and improving the connection stability between the battery cell pack 2 and the housing 5.

[0046] Preferably, with the fixing bracket installed in the housing 5, a gap for adhesive is formed between the side wall of the housing 5 and the connecting part. The adhesive part can be injected into the gap through the adhesive groove 13. On the one hand, by setting the adhesive gap, it is possible to effectively facilitate the installation of the fixing bracket into the housing 5; on the other hand, such as Figure 3As shown, when the adhesive portion overflows from the self-contained adhesive groove 13 into the adhesive gap, it can effectively increase the connection area between the connecting parts and the housing 5, thereby improving the connection stability between the fixed bracket and the housing 5.

[0047] Preferably, the gap between the adhesive and the surface can be 0.25mm to 2.0mm, for example, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.5mm, etc., so as to control the overflow range of the adhesive portion.

[0048] Alternatively, the aforementioned adhesive portion can be glue.

[0049] Preferably, the injection amount of the adhesive portion can be 1 to 1.3 times the volume of the adhesive reservoir 13 to further control the overflow range of the adhesive portion.

[0050] Preferably, such as Figures 1 to 3 As shown, the connecting portion may include symmetrical support legs 11, each of which may include a first support rib 111 and a second support rib 112. The first support rib 111 and the second support rib 112 are respectively disposed on both sides of the edge. The first support rib 111 and the second support rib 112 are symmetrically arranged about the edge. The first support rib 111 and the second support rib 112 together form a rubber-receiving groove 13, thus effectively ensuring the support strength and stability of the connecting portion.

[0051] Preferably, such as Figures 1 to 3 As shown, the connecting part may also include a limiting rib 12, which extends radially along the housing 5, and the adhesive groove 13 is a groove provided on the outer side wall of the limiting rib 12, so that the connecting part can adapt to narrow spaces.

[0052] like Figure 2 As shown in the figure, the above-mentioned support body 10 is an example of a regular hexagonal prism. The following will use... Figure 2 The fixed bracket shown is described in detail below.

[0053] When the battery pack is in use, the first direction F1 is perpendicular to the gravity direction G, wherein two of the six side walls of the regular hexagonal prism are perpendicular to the gravity direction G (these two are defined as the top wall and the bottom wall, respectively). For ease of description, the direction perpendicular to both the first direction F1 and the gravity direction G is defined as the second direction F2.

[0054] Preferably, such as Figure 2 As shown, the two sides of the bottom wall in the second direction F2 can be respectively provided with the above-mentioned symmetrical support legs 11 to ensure the support stability of the fixed bracket.

[0055] Preferably, such as Figure 2 As shown, the two side edges of the regular hexagonal prism on the second direction F2 can also be provided with the above-mentioned symmetrical support legs 11 to ensure the stability of the fixed bracket on the second direction F2 and prevent the fixed bracket from shaking relative to the shell 5 on the second direction F2.

[0056] Preferably, such as Figure 2 As shown, one of the side ribs on both sides of the top wall in the second direction F2 can be provided with a wiring harness for electrical connection of the battery pack, and the other side of the side ribs on both sides of the top wall in the second direction F2 can be provided with the aforementioned limiting rib 12. On the one hand, the limiting rib 12 can provide more space for wiring harness arrangement; on the other hand, the limiting rib 12 can further ensure the stability of the fixed bracket and prevent the fixed bracket from shaking relative to the shell 5 in the direction of gravity G.

[0057] In an embodiment, such as Figure 1 , Figure 3 and Figure 5 As shown, the battery cell assembly 2 can extend along the first direction F1. The fixing bracket can include a first fixing member 101 and a second fixing member 102. Both the first fixing member 101 and the second fixing member 102 are the bracket assembly described above. The bracket body 10 of the first fixing member 101 is provided with a first slot, and the bracket body 10 of the second fixing member 102 is provided with a second slot. A part of the battery cell assembly 2 is inserted into the first slot, and the other part of the battery cell assembly 2 is inserted into the second slot. In this way, through the docking of the first fixing member 101 and the second fixing member 102 along the first direction F1, the bracket body 10 of the first fixing member 101 and the bracket body 10 of the second fixing member 102 can effectively wrap the two pairs of battery cell assemblies in the first direction F1. This not only ensures the stability of the battery cell assembly 2, but also the fixing bracket can effectively protect the battery cell assembly 2 and reduce the probability of damage to the battery cell assembly 2.

[0058] Preferably, such as Figure 3 and Figure 5 As shown, the sum of the groove depth of the first slot in the first direction F1 and the groove depth of the second slot in the first direction F1 can be slightly greater than or equal to the size of the battery cell assembly 2, so as to ensure that the battery cell assembly 2 can be completely wrapped by the first fixing member 101 and the second fixing member 102, and further improve the completeness of the protection of the battery cell assembly 2 by the fixing bracket.

[0059] Optionally, the shape of the first slot can be adapted to the shape of the bracket body 10 of the first fixing member 101. Preferably, as Figure 1As shown, the aforementioned battery cell assembly 2 may include multiple battery cells, which can be arranged in an array within the first slot. Similarly, the shape of the aforementioned second slot can be adapted to the shape of the support body 10 of the second fixing member 102.

[0060] Preferably, the battery cell can be a cylindrical battery cell, and the two ends of the cylindrical battery cell in the first direction F1 can be respectively provided with a first polarity and a second polarity.

[0061] Preferably, such as Figure 1 As shown, the bracket body 10 of the first fixing member 101 is provided with a first connecting hole that penetrates the first fixing member 101 along the first direction F1, and the bracket body 10 of the second fixing member 102 is provided with a second connecting hole that penetrates the second fixing member 102 along the first direction F1.

[0062] Preferably, the number of both the first and second connecting holes is adapted to the number of battery cells included in the battery cell assembly 2. When the battery cell assembly 2 is mounted on the fixed bracket, the first and second polarities of the cylindrical battery cells can be exposed by the first and second connecting holes, respectively, to facilitate the electrical connection of the battery cell assembly 2.

[0063] The second aspect of this application also provides a battery pack, including the above-described cell assembly 2, the above-described housing 5, and the fixing bracket described in any of the above embodiments. Therefore, it has all the beneficial technical effects of the fixing bracket, which will not be repeated here.

[0064] Preferably, such as Figures 3 to 5 As shown, the battery pack may include multiple cell groups 2 and multiple fixing brackets. The multiple fixing brackets are stacked along the first direction F1, and each fixing bracket corresponds to one cell group 2 to improve the energy storage capacity of the battery pack.

[0065] Preferably, such as Figure 1 As shown, the battery pack may also include a first busbar 31 and a second busbar 32. Each fixed bracket has a first busbar 31 and a second busbar 32 at both ends to facilitate the electrical connection of the first polarity and the second polarity of each cell in the cell group 2.

[0066] Preferably, such as Figure 1 As shown, the first busbar 31 can be disposed on the side of the first fixing member 101 opposite to the second fixing member 102, and the battery cells of the battery cell assembly 2 can be electrically connected to the first busbar 31 via the corresponding first connection hole.

[0067] Correspondingly, such as Figure 1 As shown, the second busbar 32 can be disposed on the side of the second fixing member 102 opposite to the first fixing member 101, and the battery cells of the battery cell assembly 2 can be electrically connected to the second busbar 32 via the corresponding second connection hole.

[0068] Preferably, such as Figure 1 As shown, the battery pack may also include a flexible acquisition board 4 for acquiring the temperature and voltage of the corresponding battery pack.

[0069] Optionally, the flexible acquisition board 4 can be a flexible printed circuit (FPC).

[0070] Optionally, such as Figure 1 As shown, the flexible acquisition plate 4 can be set at one end of the first busbar 31 opposite to the fixed bracket and connected to the first busbar 31.

[0071] Optionally, not shown in the figure, the flexible acquisition plate 4 can be disposed at one end of the second busbar 32 opposite to the fixed bracket and connected to the second busbar 32.

[0072] Preferably, such as Figure 5 As shown, the aforementioned multiple fixed brackets can all be installed inside the aforementioned housing 5.

[0073] Optionally, not shown in the figure, the battery pack may further include a buffer insulation section. This buffer insulation section can be disposed within the gap formed by the shape difference between the polygonal column and the cylindrical shell 5. On the one hand, this effectively improves the battery pack's resistance to compression and impact; on the other hand, it effectively improves the battery pack's heat insulation capacity. Optionally, the buffer insulation section can be a buffer insulation material, such as foam or cotton foam.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fixing support, characterized by, Used to fix the battery cell assembly to the battery pack housing, the housing being cylindrical and extending along a first direction; The fixing bracket includes a bracket assembly, which includes a bracket body, a connecting part, and an adhesive part. The bracket body is a polygonal column extending along the first direction, and the bracket body is provided with a slot for fixing the battery cell assembly. The connecting part is fixedly disposed on the side edge of the bracket body and extends along the first direction with the connecting part. The outer side wall of the connecting part is provided with an adhesive groove extending along the first direction. With the fixed bracket installed on the housing, the inner wall of the housing is fitted to the connecting part, the side of the adhesive groove facing the housing is open, and the adhesive part is filled with the adhesive groove to bond the connecting part and the housing.

2. The fixing bracket according to claim 1, characterized in that, With the fixed bracket installed on the housing, an adhesive gap is formed between the housing sidewall and the connecting part, and the adhesive part can be injected into the adhesive gap through the adhesive groove.

3. The fixture of claim 1, wherein The connecting part includes symmetrical legs, and the symmetrical legs include a first support rib and a second support rib; The first support rib and the second support rib are respectively disposed on both sides of the edge; The first support rib and the second support rib are symmetrically arranged about the edge. The first support rib and the second support rib are arranged together to form the adhesive groove.

4. The fixture of claim 1, wherein The connecting portion includes a limiting rib that extends radially along the housing, and the adhesive groove is a recess provided on the outer side wall of the limiting rib.

5. The fixing bracket according to claim 2, characterized in that, The gap between the adhesive molecules is 0.25mm to 2.0mm; And / or, the amount of the adhesive portion injected is 1 to 1.3 times the volume of the adhesive reservoir.

6. The fixing bracket according to any one of claims 1 to 5, characterized in that, The battery cell assembly extends along the first direction; The fixing bracket includes a first fixing member and a second fixing member, both of which are bracket assemblies. The bracket body of the first fixing member is provided with a first slot, and the bracket body of the second fixing member is provided with a second slot. A portion of the battery cell assembly is inserted into the first slot, and another portion of the battery cell assembly is inserted into the second slot.

7. A battery pack, characterized by, It includes the battery cell assembly, the housing, and the mounting bracket according to any one of claims 1 to 6.

8. The battery pack of claim 7, wherein, The battery pack includes multiple cell groups and multiple fixing brackets, with the multiple fixing brackets stacked along the first direction, and each fixing bracket corresponding to one cell group.

9. The battery pack of claim 7, wherein, Each of the battery cell groups includes a plurality of battery cells, and each battery cell has a first polarity and a second polarity respectively provided at both ends in a first direction, and both the first polarity and the second polarity of the battery cell can be exposed by the fixing bracket. The battery pack also includes a first busbar and a second busbar, with the first busbar and the second busbar respectively provided at both ends of each of the fixed brackets.

10. The battery pack of claim 9, wherein, It also includes a flexible acquisition plate, which is disposed at the end of the first busbar facing away from the fixed bracket and connected to the first busbar; Alternatively, the flexible acquisition plate is disposed at the end of the second busbar opposite to the fixed bracket and is connected to the second busbar.

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