Battery bracket and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery bracket and a battery pack, the battery bracket is used for fixing a battery pack on a shell, the battery bracket comprises a bracket part, the bracket part comprises a mounting body and a supporting part, and the mounting body is used for fixing a battery cell group. When the support part is arranged in the shell, a gap is formed between the shell and the placement body, and the support part is arranged between the shell and the placement body and fixedly connected with the placement body. The first one of the inner wall of the shell and the supporting part is provided with a protruding block extending in the first direction, the second one of the inner wall of the shell and the supporting part is provided with a sliding groove extending in the first direction, and the protruding block can be limited in the sliding groove. According to the battery bracket and the battery pack provided by the invention, the cooling efficiency of the battery pack is ensured, the stability of the gap between the mounting body and the shell is ensured, and the arrangement stability and the butt joint precision of the battery pack in the shell are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery holder 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 battery holder and battery pack to address, to some extent, the technical problem in the prior art where the circular outer surface of cylindrical batteries makes them difficult to directly fix onto a flat surface or a structure of a specific shape, 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 battery bracket is provided for fixing a battery pack to a housing. The battery bracket includes a bracket portion, which includes a mounting body and a support portion. The mounting body is used to fix the battery cell pack.

[0007] When the bracket portion is disposed within the housing, a gap is formed between the housing and the mounting body, and the bracket portion is disposed between the housing and the mounting body and is fixedly connected to the mounting body;

[0008] The inner wall of the housing and the support portion are provided with a protrusion extending in a first direction, and the inner wall of the housing and the support portion are provided with a groove extending in the first direction, and the protrusion can be confined within the groove.

[0009] Preferably, the housing is a cylindrical tube extending along the first direction, the mounting body is a polygonal column extending along the first direction, and the support portion is disposed on the side rib of the polygonal column extending along the first direction.

[0010] Preferably, among the plurality of side ribs of the mounting body, at least two side ribs opposite to each other are provided with the support portion.

[0011] Preferably, the inner wall of the housing is provided with a protrusion extending along the first direction, and the support portion is provided with a groove adapted to the shape of the protrusion.

[0012] Preferably, the cross-section of the protrusion is an isosceles trapezoid.

[0013] Preferably, it further includes a limiting part, wherein the limiting part is provided at both ends of the housing in the first direction to limit the position of the battery holder in the first direction;

[0014] The limiting part is detachably connected to the housing.

[0015] Preferably, the mounting body is provided with a slot for inserting the battery cell assembly;

[0016] The slot has a connecting hole at the bottom that extends through the mounting body along the first direction, and the number of connecting holes is adapted to the number of battery cells included in the battery cell assembly.

[0017] Preferably, the battery bracket includes two bracket portions, which are capable of covering the outside of the battery cell assembly from both ends in the first direction;

[0018] The support portions of the two brackets are aligned.

[0019] According to a second aspect of this application, a battery pack is provided, including the battery holder described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery holder, which will not be repeated here.

[0020] Preferably, the battery pack includes a plurality of battery brackets and a plurality of battery cell groups, the plurality of battery brackets being stacked along the first direction, and each battery bracket having one battery cell group.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] The battery bracket provided in this application effectively improves the flow of insulating coolant in the battery pack by utilizing the gap between the mounting body and the housing, thereby ensuring the cooling efficiency of the battery pack. Moreover, the support portion supports the mounting body and the housing, effectively ensuring the stability of the gap between the mounting body and the housing, thereby reducing the probability of collision between the mounting body and the housing. In addition, the protrusions and grooves respectively provided on the inner wall of the housing and the support portion effectively limit the range of movement of the battery bracket relative to the housing, realizing the positioning between the housing and the battery, thereby improving the installation stability and docking accuracy of the battery pack in the housing.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a front view structural diagram of the battery pack provided in an embodiment of this application;

[0026] Figure 2 This is a front view of the battery holder provided in an embodiment of this application;

[0027] Figure 3 This is a front view of the housing structure provided in an embodiment of this application;

[0028] Figure 4 This is an isometric structural diagram of the battery pack provided in an embodiment of this application;

[0029] Figure 5 This is an exploded structural diagram of the battery pack provided in an embodiment of this application;

[0030] Figure 6 This is another isometric structural schematic diagram of the battery pack provided in the embodiments of this application.

[0031] Figure label:

[0032] 1-Support section; 10-Placement body; 11-First support member; 12-Second support member; 13-Slide groove; 2-Battery cell assembly; 3-Busbar; 4-Flexible circuit board; 5-Housing; 51-Protrusion; 6-Limiting part; F1-First direction; F2-Second direction; G-Gravity direction. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The following reference Figures 1 to 6 This application describes a battery holder and battery pack according to some embodiments.

[0039] See Figures 1 to 6As shown, an embodiment of the first aspect of this application provides a battery holder for fixing a battery pack to a housing 5. The battery holder includes a holder portion 1, which includes a mounting body 10 and a support portion. The mounting body 10 is used to fix the battery cell assembly 2. When the holder portion 1 is disposed within the housing 5, a gap is formed between the housing 5 and the mounting body 10. The holder portion 1 is disposed between the housing 5 and the mounting body 10 and is fixedly connected to the mounting body 10. The first of the inner wall of the housing 5 and the support portion is provided with a protrusion 51 extending along a first direction F1, and the second of the inner wall of the housing 5 and the support portion is provided with a sliding groove 13 extending along the first direction F1. The protrusion 51 can be confined within the sliding groove 13.

[0040] According to the battery bracket provided by the above technical features, the gap between the mounting body 10 and the housing 5 effectively improves the flow of insulating coolant in the battery pack, thereby ensuring the cooling efficiency of the battery pack. Moreover, by supporting the mounting body 10 and the housing 5, the stability of the gap between the mounting body 10 and the housing 5 can be effectively ensured, thereby reducing the probability of collision between the mounting body 10 and the housing 5. In addition, by providing protrusions 51 and sliding grooves 13 on the inner wall of the housing 5 and the support respectively, the range of movement of the battery bracket relative to the housing 5 is effectively limited, realizing the positioning between the housing 5 and the battery, thereby improving the installation stability and docking accuracy of the battery pack in the housing 5.

[0041] Preferably, such as Figure 1 , Figure 4 and Figure 6 As shown, the housing 5 can be a cylindrical tube extending along the first direction F1, and the mounting body 10 can be a polygonal column extending along the first direction F1. The support is provided on the side rib of the polygonal column extending along the first direction F1. On the one hand, by utilizing the shape difference between the cylindrical housing 5 and the polygonal column mounting body 10, the gap between the housing 5 and the mounting body 10 is further increased, which not only facilitates the flow of insulating coolant, but also provides more space for installing other devices of the battery pack (e.g., connecting harnesses). On the other hand, by providing the support at the side rib of the polygonal column, the distance of the support in the radial direction of the housing 5 can be effectively shortened, further improving the support stability of the support and saving the material cost of the support.

[0042] Preferably, such as Figures 1 to 3 As shown, the inner wall of the housing 5 is provided with a protrusion 51 extending along the first direction F1, and the support part 1 is provided with a groove 13 that is adapted to the shape of the protrusion 51. In this way, the support strength of the housing 5 at the connection with the support part can be effectively guaranteed, thereby ensuring the deformation resistance of the housing 5.

[0043] However, it is not limited to this. As not shown in the figure, the above-mentioned protrusions can also be provided on the support part, and the above-mentioned grooves can be provided on the inner wall of the housing.

[0044] Preferably, such as Figure 3 As shown, the cross-section of the protrusion 51 can be an isosceles trapezoid. This allows the three intersecting sides of the protrusion 51 to effectively constrain the battery holder, improving the stability and accuracy of the protrusion 51 in positioning the battery holder and reducing the likelihood of derailment between the protrusion 51 and the groove 13. However, this is not a limitation; the shape of the cross-section of the protrusion 51 is not limited to the isosceles trapezoidal form. The cross-section of the protrusion 51 can also be other shapes, such as semicircular, semi-elliptical, polygonal, or other irregular shapes.

[0045] Preferably, such as Figure 1 and Figure 2 As shown, the above-mentioned support part may include a first support member 11, which may be a fan-shaped column extending along the first direction F1, so as to increase the contact area between the support part and the housing 5, thereby improving the support stability of the support part, effectively reducing the stress concentration of the housing 5 at the location of the support part, and thus improving the stability of the housing 5.

[0046] Optionally, the top corner of the aforementioned sector column may be provided with a notch that conforms to the side profile of the mounting body 10, so as to facilitate the connection between the first support 11 and the mounting body 10. In other words, the aforementioned first support 11 is not a complete sector column in a geometric sense, but a partial structure of a sector column that lacks the top corner of the sector column.

[0047] Preferably, when viewed along the radial direction of the housing 5, the axis of the sector column can overlap with the edge corresponding to the support portion.

[0048] Preferably, such as Figure 1 and Figure 2 As shown, the above-mentioned support may include a second support member 12, which may be a rectangular column along the first direction F1 to reduce the space occupancy of the support.

[0049] Preferably, such as Figure 1 , Figure 2 and Figure 5 As shown, among the multiple side ribs on which the body 10 is mounted, at least two side ribs facing each other are provided with support portions.

[0050] like Figure 1 As shown in the figure, an example of the aforementioned mounting body 10 being a regular hexagonal prism is illustrated. The following will use... Figure 1 The installation frame shown is described in detail.

[0051] 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.

[0052] Preferably, such as Figure 1 As shown, the two sides of the bottom wall in the second direction F2 can be respectively provided with the first support member 11 to ensure the support stability of the mounting body 10.

[0053] Preferably, such as Figure 1 As shown, the two side edges of the regular hexagonal prism on the second direction F2 can also be provided with the aforementioned first support member 11 to ensure the stability of the mounting body 10 on the second direction F2 and to prevent the mounting body 10 from shaking relative to the shell 5 on the second direction F2.

[0054] Preferably, such as Figure 1 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 second support member 12. On the one hand, the second support member 12 can provide more space for wiring harness arrangement; on the other hand, by providing the second support member 12, the stability of the mounting body 10 can be further ensured, and the mounting body 10 can be prevented from shaking relative to the shell 5 in the direction of gravity G.

[0055] However, it is not limited to the above-mentioned mounting body 10. It is not limited to the form of a regular hexagonal prism. For example, the mounting body 10 can also be a triangular prism, a square prism, a pentagonal prism, an octagonal prism, etc.

[0056] Preferably, such as Figure 4 As shown, the battery holder may also include a limiting part 6. The housing 5 is provided with limiting parts 6 at both ends in the first direction F1 to limit the position of the battery holder in the first direction F1, thereby effectively ensuring the positional accuracy of the battery holder in the first direction F1.

[0057] Preferably, such as Figure 4 As shown, the limiting part 6 can be a limiting ring to adapt to the cylindrical shell 5, thereby ensuring that each support part in the circumferential direction of the shell 5 can be limited by the limiting part 6.

[0058] However, it is not limited to this. As long as the limiting part 6 can guarantee the limiting effect of the battery holder, the limiting part 6 is not limited to the form of the limiting ring. For example, the limiting part 6 may include multiple parts, and each part may correspond to a support part.

[0059] Preferably, as not shown in the figure, the limiting part 6 can be detachably connected to the housing 5 to realize the installation and removal of the battery bracket and the housing 5, thereby facilitating the replacement and maintenance of the battery bracket and the cell assembly 2.

[0060] Preferably, as not shown in the figure, both the housing 5 and the limiting ring may be provided with internal threaded holes extending in the radial direction of the housing 5, and the housing 5 and the limiting ring may be connected by threaded components such as bolts or screws.

[0061] In an embodiment, preferably, such as Figure 5 As shown, the mounting body 10 may be provided with a slot for inserting the battery cell assembly 2, so as to realize the insertion and fixing of the battery cell assembly 2.

[0062] Preferably, such as Figure 5 As shown, the bottom of the slot is provided with a connection hole through which the body 10 is placed along the first direction F1. The number of connection holes is adapted to the number of battery cells included in the battery cell group 2, so that at least part of the battery cell is exposed through the connection hole to facilitate the electrical connection of the battery cell.

[0063] Preferably, such as Figure 5 As shown, the battery bracket may include two bracket parts 1, which can cover the outside of the battery cell assembly 2 from both ends in the first direction F1, so as to ensure the integrity of the protection of the battery cell assembly 2 by the battery bracket, thereby ensuring the stability and safety of the battery cell assembly 2.

[0064] Preferably, such as Figure 5 and Figure 6 As shown, the support portions of the two bracket parts 1 of the battery holder can be aligned, which facilitates the battery holder to be slidably assembled onto the housing 5.

[0065] Preferably, such as Figure 5 As shown, the battery pack may also include a busbar 3, which may be provided on both sides of the battery holder in the first direction F1, so as to facilitate the separate conduction of current to the positive and negative terminals of the cell group 2.

[0066] Preferably, such as Figure 5 As shown, the battery pack may also include a flexible circuit board 4, which may be disposed on one side of the battery holder in the first direction F1 and connected to the busbar 3 so that the flexible circuit board 4 can collect information such as temperature and voltage of the cell group 2.

[0067] The second aspect of this application also provides a battery pack, including the aforementioned housing 5, the aforementioned cell assembly 2, and the battery bracket described in any of the aforementioned embodiments. Therefore, it has all the beneficial technical effects of the battery bracket, which will not be repeated here.

[0068] Preferably, such as Figure 6 As shown, the battery pack may include multiple battery brackets and multiple cell groups 2. The multiple battery brackets are stacked along the first direction F1, and each battery bracket is provided with one cell group 2 to improve the energy storage capacity of the battery pack.

[0069] Preferably, such as Figure 4 As shown, the aforementioned battery brackets can all be housed within the aforementioned housing 5.

[0070] Correspondingly, such as Figure 6 As shown, the support portions of multiple battery brackets in the same battery pack can also be aligned one by one along the first direction F1, so as to facilitate the one-to-one installation of multiple battery brackets into the housing 5.

[0071] 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 battery holder, characterized in that, The battery bracket is used to fix the battery pack to the housing. The battery bracket includes a bracket part, the bracket part includes a mounting body and a support part, and the mounting body is used to fix the battery cell pack. When the bracket portion is disposed within the housing, a gap is formed between the housing and the mounting body, and the bracket portion is disposed between the housing and the mounting body and is fixedly connected to the mounting body; The inner wall of the housing and the support portion are provided with a protrusion extending in a first direction, and the inner wall of the housing and the support portion are provided with a groove extending in the first direction, and the protrusion can be confined within the groove.

2. The battery holder according to claim 1, characterized in that, The shell is a cylindrical tube extending along the first direction, the mounting body is a polygonal column extending along the first direction, and the support is disposed on the side rib of the polygonal column extending along the first direction.

3. The battery holder according to claim 2, characterized in that, Among the multiple side ribs of the mounting body, at least two side ribs facing each other are provided with the support portion.

4. The battery holder according to claim 1, characterized in that, The inner wall of the housing is provided with a protrusion extending along the first direction, and the support portion is provided with a groove adapted to the shape of the protrusion.

5. The battery holder according to claim 1, characterized in that, The cross-section of the protrusion is an isosceles trapezoid.

6. The battery holder according to claim 1, characterized in that, It also includes a limiting part, wherein the housing is provided with the limiting part at both ends in the first direction, so as to limit the position of the battery holder in the first direction; The limiting part is detachably connected to the housing.

7. The battery holder according to claim 1, characterized in that, The mounting body is provided with a slot for inserting the battery cell assembly. The slot has a connecting hole at the bottom that extends through the mounting body along the first direction, and the number of connecting holes is adapted to the number of battery cells included in the battery cell assembly.

8. The battery holder according to claim 1, characterized in that, The battery bracket includes two bracket portions, which are capable of covering the outside of the battery cell assembly from both ends in the first direction. The support portions of the two brackets are aligned.

9. A battery pack, characterized in that, It includes the housing, the battery cell assembly, and the battery holder according to any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that, The battery pack includes a plurality of battery brackets and a plurality of battery cell groups, the plurality of battery brackets being stacked along the first direction, and each battery bracket having one battery cell group.

Images