Glue-filled part, battery pack shell, battery pack and electrical equipment

Abstract

The embodiments of the present application provide a glue-filling component, a battery pack shell, a battery pack and an electrical device, which relate to the field of battery technology. The glue-filling component includes: a flexible main body section, a glue inlet is provided on the flexible main body section, and the flexible main body section is used to connect with the shell of the battery pack; a flexible bending section, the flexible bending section is formed by bending and extending from one end of the flexible main body section, and a glue outlet is provided on the flexible bending section; wherein, the flexible main body section and the flexible bending section are both provided with mutually connected accommodating cavities, and the glue inlet and the glue outlet are both connected to the accommodating cavity. When glue filling is performed, the flexible bending section can increase the glue feeding resistance, so that the flexible main body section and the flexible bending section expand evenly, so that when the glue-filling component is used to fill the gap between the battery cell and the shell, it can provide a stable expansion restraint force for the battery cell, thereby avoiding problems such as reduced cycle life of the battery cell due to lack of force or lithium plating.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a glue-filled part, a battery pack shell, a battery pack and an electrical device. Background Art

[0002] When the battery cell is placed in the battery pack shell, it is usually necessary to fill glue between the battery cell and the side beam of the battery pack shell through a glue bag to effectively connect the battery cell and the side beam.

[0003] When using a glue potting bag for glue filling, the glue potting bag is generally fixed on the side beam, and a glue inlet and a glue outlet are opened on the glue potting bag. The glue is fed into the glue potting bag from the glue inlet, and the glue in the glue potting bag enters the gap between the battery cell and the glue potting bag from the glue outlet, gradually filling the gap between the battery cell and the glue potting bag to achieve glue filling.

[0004] However, in actual application, it is easy for some areas of the glue filling bag to not be effectively filled with glue, and the different areas of the glue filling bag to expand unevenly, thus affecting the glue filling effect. Summary of the Invention

[0005] The embodiments of the present application provide a glue-filling component, a battery pack shell, a battery pack, and an electrical device to solve the problem of uneven expansion of different areas during glue filling in existing glue-filling bags.

[0006] In a first aspect, an embodiment of the present application provides a glue-filling component, comprising: a flexible main body segment, the flexible main body segment being provided with a glue inlet, the flexible main body segment being used to connect to a battery pack housing;

[0007] a flexible bending section, the flexible bending section being formed by bending and extending from one end of the flexible main section, and the flexible bending section being provided with a glue outlet;

[0008] Wherein, the flexible main body section and the flexible bending section are both provided with mutually communicating accommodating cavities, and the glue inlet and the glue outlet are both communicated with the accommodating cavities.

[0009] In a possible implementation manner, one end of the flexible bending section facing away from the flexible main section is parallel to the flexible main section, and a projection of the flexible bending section in a thickness direction of the flexible main section coincides with the flexible main section.

[0010] In a possible implementation, the flexible bending sections are provided at both ends of the flexible main section, and the glue inlet is located in the middle of the flexible main section.

[0011] In a possible embodiment, along the extension direction of the flexible main body segment, the length of the flexible main body segment is X, and the shortest distance between the center of the glue inlet and the center of the glue outlet is less than or equal to 0.7X and greater than or equal to 0.3X.

[0012] In a possible implementation, along the extension direction of the flexible main body segment, the distance between the center of the glue inlet and the centers of the two glue outlets is equal.

[0013] In a possible implementation manner, the flexible bending section is provided at one end of the flexible main section, and the glue inlet is provided at the other end of the flexible main section.

[0014] In a possible implementation manner, the glue outlet is located on one side of the flexible bending section in the height direction of the glue filling component.

[0015] In a possible implementation manner, the length of the flexible main body section at the glue outlet in the extension direction is 2 mm-25 mm.

[0016] In a possible implementation manner, the glue outlet is located at an end of the flexible bending section away from the flexible main body section.

[0017] In a possible implementation, the glue outlet is a flow channel extending along the extension direction of the flexible main body segment or the height direction of the glue-filling component, and the size of the glue outlet gradually decreases along the direction of glue outflow.

[0018] In a possible embodiment, the bag further includes a first flexible film layer and a second flexible film layer disposed opposite to each other, wherein the first flexible film layer and the second flexible film layer are connected by hot pressing to form a bag body having the accommodation cavity therein;

[0019] At least one end of the bag body is bent to form the flexible bending section, and the remaining area of ​​the bag body forms the flexible main body section.

[0020] In a possible implementation, an adhesive layer is further provided on the flexible main body segment, and the adhesive layer is used to connect with the battery pack shell.

[0021] In the second aspect, the present application provides a battery pack shell, comprising a shell body and a glue filling component described in any one of the first aspects, wherein the shell body is provided with a receiving cavity for placing the battery cell, the glue filling component is located in the receiving cavity, and the glue filling component is used to fill the gap between the battery cell and the cavity wall of the receiving cavity.

[0022] In a possible embodiment, an adapter is further included, which is used to connect the glue potting equipment and the glue inlet of the glue potting component to deliver the potting glue in the glue potting equipment into the glue potting component.

[0023] In one possible embodiment, the shell body further includes two side beams and at least one middle cross beam, wherein the side beams and the middle cross beam extend in the same direction, the two side beams are respectively provided at both ends of the shell body, the middle cross beam is located between the two side beams, and the two ends of the middle cross beam are respectively connected to the two sides of the shell body to separate the area of ​​the shell body located between the two side beams to form at least two accommodating cavities;

[0024] Wherein, at least one of the middle cross beam and the side beam is provided with the adapter, and at least one of the middle cross beam and the side beam is provided with the glue-filling component on a side adjacent to the accommodating cavity.

[0025] In a possible embodiment, the system further includes at least one intermediate longitudinal beam, wherein the extending direction of the intermediate longitudinal beam is different from the extending direction of the intermediate cross beam, and the two ends of the intermediate longitudinal beam are respectively connected to the two side beams;

[0026] The middle cross beam and the middle longitudinal beam are arranged in an alternating manner to separate the area of ​​the shell body between the two side beams to form a plurality of the accommodating cavities.

[0027] In a possible implementation manner, the adapter includes a first inlet and a first outlet that are interconnected, the first inlet is used to connect to the glue pouring equipment, and the first outlet is used to connect to the glue pouring component.

[0028] In a possible implementation manner, the adapter provided on the middle crossbeam further includes a second outlet, and the second outlet is connected to the first inlet;

[0029] Or the adapter provided on the middle crossbeam further includes a second inlet communicated with the second outlet, and the second inlet is used to be connected to the glue pouring equipment;

[0030] Wherein, the first outlet and the second outlet are respectively connected to the glue-filling parts located on both sides of the middle crossbeam.

[0031] In a third aspect, the present application provides a battery pack, comprising a battery group and the battery pack shell described in any one of the second aspects, wherein the battery group is fixed on the battery pack shell.

[0032] In a possible embodiment, the battery pack includes a plurality of battery cells stacked along a first direction, the extension direction of the glue potting part is the same as the extension direction of the battery cells, and the glue potting part is used to fill the gap between the end faces of the battery pack at both ends along the first direction and the battery pack shell.

[0033] In a fourth aspect, the present application provides an electrical device, comprising an electrical device and the battery pack described in the third aspect, wherein the battery pack is used to supply power to the electrical device.

[0034] In the glue-filled part, battery pack shell, battery pack and electrical equipment provided by the embodiments of the present application, the glue-filled part is formed by setting a flexible main body section and a flexible bending section, and the flexible bending section is bent and extended from one end of the flexible main body section. The flexible main body section and the flexible bending section are both provided with mutually connected accommodating cavities, a glue inlet is provided on the flexible main body section, and a glue outlet is provided on the flexible bending section. The potting glue enters the accommodating cavity on the flexible main body section from the glue inlet, and gradually enters the accommodating cavity on the flexible bending section after filling the accommodating cavity on the main body. A bend is generated at the connection between the flexible bending section and the flexible main body section, which increases the resistance of the potting glue to the glue outlet, so that the potting glue first fills the entire glue-filled part and then overflows from the glue outlet, so that the potting glue in the glue-filled part is evenly filled and the glue-filled part bulges evenly. Therefore, when the gap between the battery cell and the battery pack shell is filled by the glue-filled part, the gap can be evenly filled, thereby providing a stable expansion restraint force for the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] Figure 1 A schematic diagram of the front structure of the glue-filled component provided in this application;

[0037] Figure 2 A schematic diagram of the back structure of the glue-filled component provided in this application;

[0038] Figure 3 A cross-sectional view of a portion of the glue-filled component provided in this application;

[0039] Figure 4 An enlarged view of the local structure of the glue-filled part provided in this application;

[0040] Figure 5 A schematic structural diagram of another embodiment of the glue-filling component provided in this application;

[0041] Figure 6 A schematic diagram of the structure of the battery pack shell provided in this application;

[0042] Figure 7 for Figure 6 A magnified schematic diagram of the structure within circle A;

[0043] Figure 8 A schematic diagram of the structure of the adapter in the battery pack housing provided in this application;

[0044] Figure 9 Schematic diagram of the assembly process of the battery pack shell and battery cells provided in this application;

[0045] Figure 10 for Figure 9 An enlarged schematic diagram of the structure in circle B;

[0046] Figure 11 Assembly diagram of the battery pack shell and battery cells provided for this application.

[0047] Reference numerals:

[0048] 100 - glue filling part; 110 - flexible main section; 111 - glue inlet; 112 - receiving cavity; 120 - flexible bending section; 121 - glue outlet; 130 - adhesive layer;

[0049] 200 - battery pack housing; 210 - housing body; 220 - accommodating cavity; 230 - side beam; 240 - adapter; 241 - first inlet; 242 - first outlet; 243 - second inlet; 244 - second outlet; 245 - main body; 250 - middle cross beam; 260 - middle longitudinal beam;

[0050] 300-battery cells.

[0051] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0053] In the related art, the following common glue filling solutions are used to fill the gap between the battery cell and the battery pack shell:

[0054] The glue inlet of the glue bag is connected to the glue filling equipment, and the potting glue enters the glue bag through the glue inlet and then leaves the glue bag from the glue outlet.

[0055] When the above method is used, the potting glue will flow out quickly when it approaches the glue outlet, so that the glue bag in the area near the glue outlet cannot be completely filled, resulting in the situation that some areas of the glue bag are filled while other areas are short of glue during the filling process.

[0056] In this regard, the present application provides a glue-filling part, which, by setting a flexible main body section and a flexible bending section, makes the glue inlet and glue outlet respectively arranged on the flexible main body section and the flexible bending section, thereby effectively increasing the resistance of the glue outlet, so that the potting glue can be evenly filled in the glue-filling part, so that the glue-filling part can expand evenly, thereby effectively solving the problem of uneven filling of the glue-filling bag in the prior art.

[0057] It should be noted that the glue-filled parts in this application are mainly used in battery packs. During the battery pack production process, the glue-filled parts are directly fixed on the battery pack shell, which can effectively fill the gap between the battery cell and the shell, thereby providing a stable expansion restraint force for the battery cell, improving the cycle life of the battery cell, and avoiding problems such as lithium plating due to the battery cell being without force.

[0058] The electrical equipment that uses the above-mentioned battery packs includes but is not limited to electric vehicles, consumer electronics, energy storage systems, industrial equipment and other equipment.

[0059] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0060] The embodiment of the present application provides a glue-filling part 100, such as Figure 6 、 Figure 9 and Figure 10 The above is mainly used to fill the gap between the battery cell 300 and the battery pack shell 200 by filling the potting glue, wherein the battery pack shell 200 can be a battery tray or a battery pack box. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the potting component 100 includes a flexible main section 110 and a flexible bending section 120. The flexible bending section 120 is bent and extended from one end of the flexible main section 110, and a accommodating cavity 112 is provided inside the flexible main section 110 and the flexible bending section 120. The accommodating cavity 112 is used to accommodate the potting glue. The accommodating cavities 112 of the flexible main section 110 and the flexible bending section 120 are interconnected, and after the accommodating cavity 112 is filled with the potting glue, the flexible main section 110 and the flexible bending section 120 can expand evenly.

[0061] For example, the entire glue-filled component 100 may be a strip-shaped flexible bag body, the end of which is bent to form a flexible bending section 120 , while the unbent area is the flexible main body section 110 .

[0062] Specifically, the glue-filled part 100 includes a first flexible film layer and a second flexible film layer arranged opposite to each other. The first flexible film layer and the second flexible film layer are hot-pressed to form a bag body with the accommodating cavity inside, and then the end of the bag body is bent to form a flexible bending section and a flexible main section.

[0063] The first flexible film layer and the second flexible film layer may both be PE films (Polyethylene films), or other flexible films that can play a similar role.

[0064] Of course, the glue-filled part 100 can also be a flexible bag of other shapes, which can be determined according to the shape of the gap between the battery cell 300 and the side beam 230. It should be noted that the flexible bag can be prepared in any manner. For example, the first flexible film layer and the second flexible film layer are two independent PE films, which are sealed at the edges by heat-pressing to form a strip-shaped bag, and the accommodating cavity 112 is formed between the first flexible film layer and the second flexible film layer. Alternatively, the first flexible film layer and the second flexible film layer can be an integral structure during production, with only the two ends being unconnected, that is, they form a cylindrical structure with only two ends open, and heat-pressing is performed at the two openings. This embodiment is not limited to this.

[0065] Among them, a glue inlet 111 is provided on the flexible main body section 110, and the glue inlet 111 is used to connect to the glue potting equipment for glue injection. A glue outlet 121 is provided on the flexible bending section 120, and the glue outlet 121 is used to overflow the excess glue to the outside of the glue potting part 100 after the potting glue fills the accommodating cavity 112.

[0066] During use, the potting glue enters the accommodating cavity 112 from the glue inlet 111, gradually fills the accommodating cavity 112 of the flexible main section 110, and then enters the flexible bending section 120 through the bending area. The flexible bending section 120 is formed by bending at one end of the flexible main section 110, which can increase the resistance of the glue outlet 121, so that the potting glue preferentially fills the entire accommodating cavity 112, thereby making the glue-filled component 100 bulge evenly. After the glue-filled component 100 is completely filled, the excess potting glue flows to the glue outlet 121 through the flexible bending section 120 and overflows from the glue outlet 121, so that there are no bubbles inside the glue-filled component 100, and the potting glue is evenly filled in the accommodating cavity 112.

[0067] In some embodiments, the glue outlet 121 and the glue inlet 111 are respectively located at two ends of the flexible main body section 110 in the thickness direction.

[0068] Specifically, at both ends of the flexible main body segment 110 in the thickness direction, that is, the two large surfaces of the flexible main body segment, one needs to be connected to the battery pack shell 200, and the other is adjacent to the battery cell 300. The glue inlet 111 is set on the side connected to the battery pack shell 200, and the glue outlet 121 is set on the side adjacent to the battery cell 300. When the potting glue overflows through the glue outlet 121, it can be directly filled between the battery cell 300 and the potting part 100.

[0069] In some embodiments, one end of the flexible bending section 120 facing away from the flexible main section 110 is parallel to the flexible main section 110 , and a projection of the flexible bending section 120 in the thickness direction of the flexible main section 110 coincides with the flexible main section 110 .

[0070] Exemplarily, the potting component is a bag body extending along the X direction, the thickness direction of the bag body is the Y direction, one end of the bag body is flipped along the Y direction and then bent along the positive or negative direction of the X direction to form a flexible bending section 120, and the unbent area of ​​the bag body is the flexible main section 110, the flexible bending section 120 is parallel to the flexible main section 110, and the projection of the flexible bending section 120 in the Y direction is located within the flexible main section 110, so that the overall length of the final potting component 100 in the X direction is the length of the flexible main section 110.

[0071] At the same time, this bending method is equivalent to the flexible bending section 120 being bent 180° relative to the flexible main section 110. On the one hand, the gap value between the battery cell 300 and the battery pack shell 200 is limited. The flexible bending section 120 is bent 180° relative to the flexible main section 110. Compared with bending 120° or other angles, it can reduce the space it occupies in the Y direction, so that the glue filling part 100 can save space when placed in the battery pack shell 200. On the other hand, the flexible bending section 120 is bent 180° relative to the flexible main section 110, which can also effectively increase the glue filling resistance and avoid the problem of glue leakage in some areas of the bending area, so that the glue filling bag can swell evenly after the glue is filled.

[0072] It should be noted that the flexible bending section 120 can also be bent at other angles relative to the flexible main section 110 as long as the resistance to glue inflow can be effectively improved so that the potting glue can evenly fill the accommodating cavity 112. This embodiment does not limit this.

[0073] Exemplarily, the potting part is a bag body extending along the X direction, the thickness direction of the bag body is the Y direction, and the bag body is divided into a flexible main body section 110 located in the middle, a flexible bending section 120 located at the end, and a transition section located between the flexible main body section 110 and the flexible bending section 120. The transition section is folded multiple times, and finally the flexible bending section 120 is parallel to the flexible main body section 110, and the projection of the flexible bending section 120 in the Y direction is located within the flexible main body section 110. The multiple bending of the transition section can effectively increase the resistance to glue entry.

[0074] Exemplarily, the potting part is a bag body extending along the X direction, the thickness direction of the bag body is the Y direction, the bag body is rectangular, and one corner of the bag body is bent 180° along the Y direction to form a flexible bending section 120, and the remaining part is a flexible main body section 110, and the glue inlet 111 is set at the corner of the bag body where it is bent.

[0075] It should be noted that the above examples are merely illustrative of the structures of the flexible bending section 120 and the flexible main section 110 , and are not limiting. Other common methods are also acceptable.

[0076] The flexible bending section 120 may be provided at only one end of the flexible main section 110 , or may be provided at both ends of the flexible main section 110 .

[0077] Exemplarily, flexible bending sections 120 are provided at both ends of the flexible main section 110 .

[0078] At this time, the potting glue enters the installation cavity from the glue inlet 111 on the flexible main section 110, and then flows toward the two ends, gradually filling the accommodating cavity 112. The excess glue overflows through the glue outlet 121 at both ends, causing the glue-filled component 100 to expand evenly.

[0079] Furthermore, in order to improve the filling effect, along the extension direction of the flexible main body segment, the length of the flexible main body segment 110 can be X (the length of the flexible main body segment 110 in the X direction), the distance between the glue inlet 111 and the glue outlet 121 is Y, and 0.3X≤Y≤0.7X.

[0080] Specifically, Y is the minimum distance from the center of the glue inlet 111 to the center of the glue outlet 121 along the X direction. At this time, the distance between the glue inlet 111 and the glue outlets 121 at both ends is appropriate, which facilitates the potting glue to fill the potted component 100.

[0081] Please note that, see Figure 1 、 Figure 2 and Figure 4 As shown, the glue inlet 111 can be located in the middle of the flexible main body segment 110 in the Z direction, or can be located at the edge, which is not limited in this embodiment.

[0082] In addition, in order to improve the glue filling effect, the distances between the center of the glue inlet 111 and the centers of the glue outlets 121 at both ends can be made equal.

[0083] For example, Figure 4 As shown, taking the glue-filling part 100 applied to a battery of conventional size as an example, 200mm≤X≤1000mm, at this time, the glue outlet 121 is located at one end of the height direction of the glue-filling part 100, and the length a of the glue outlet 121 in the X direction is generally 2-25mm. If the size of the glue outlet 121 is too large, it is easy to cause the pressure of the glue outlet 121 to be small, and the potting glue is easy to overflow, so that the glue outlet 121 area cannot expand evenly.

[0084] When the glue-filled part 100 is formed by hot pressing two PE films, the hot pressing width b of the edge is usually 2-20 mm to ensure that the two PE films remain stably connected, and the length c of the flexible bending section 120 in the X direction can be set to 10-40 mm. Of course, this length includes the hot pressing width on the end of the flexible bending section 120 away from the flexible main section 110.

[0085] Among them, the length of the flexible bending section 120 can be adjusted according to actual conditions, as long as the glue outlet 121 can be set, and the distance between the glue outlet 121 and the glue inlet 111 can also be adjusted according to actual conditions, which is not limited in this embodiment.

[0086] Exemplarily, a flexible bending section 120 is provided at one end of the flexible main section 110, and a glue inlet 111 is provided at the other end of the flexible main section 110, that is, the flexible bending section 120 is provided at only one end of the flexible main section 110. After the potting glue enters the potting component 100 from the glue inlet 111 and fills the entire potting component 100, it overflows through the glue outlet 121.

[0087] During use, the glue outlet 121 can be located at any position of the flexible bending section 120 .

[0088] For example, Figure 4 As shown, the glue outlet 121 is located on one side of the flexible bending section 120 in the height direction of the glue-filling component 100, for example, at the top of the flexible bending section 120 in the Z direction. At this time, the width of the glue outlet 121 is its extension distance in the X direction.

[0089] The potting glue enters the flexible bending section 120 along the X direction and needs to change direction to overflow from the glue outlet 121 at the top of the flexible bending section 120 in the Z direction, thereby further increasing the glue discharge resistance in the glue outlet 121 area and making the potting glue evenly fill the flexible bending section 120.

[0090] Exemplarily, the glue outlet 121 is located at an end of the flexible bending section 120 away from the flexible main section 110 .

[0091] Specifically, when one end of the flexible main section 110 is bent as a whole to form the flexible bending section 120, the glue outlet 121 is located on the side of the flexible bending section 120 extending along the Z direction. When only one corner of the flexible main section 110 is bent to form the flexible bending section 120, the glue outlet 121 can be set at the corner of the flexible bending section 120.

[0092] In some embodiments, the size of the glue outlet 121 gradually decreases along the direction of glue outflow. Specifically, the glue outlet 121 is a flow channel with a certain depth. The channel extends along the extension direction (X direction) of the flexible bending section 120 or the height direction (Z direction) of the glue-filled part 100, and the cross-sectional area of ​​the flow channel gradually decreases along the direction of glue outflow.

[0093] For example, the two sides of the glue outlet 121 can be pressed together by hot pressing, so that the glue outlet 121 has an inverted trumpet-shaped structure, which will further increase the resistance at the glue outlet 121, thereby improving the uniformity of expansion of the glue-filled component 100.

[0094] It should be noted that the glue outlet 121 may also be configured in other shapes as long as the glue outlet resistance can be increased.

[0095] In some embodiments, see Figure 1 、 Figure 5 、 Figure 6 and Figure 9 As shown, an adhesive layer 130 is further provided on one side of the flexible main body section 110 where the adhesive inlet 111 is provided. The adhesive layer 130 is used to connect with the battery pack shell 200 .

[0096] For example, taking fixing on the battery pack shell 200 as an example, the adhesive layer 130 can be a strip structure extending along the Z direction. At this time, one strip can be set at each end of the flexible main body segment 110, and the flexible main body segment 110 is fixed to the side beam 230 or the middle cross beam 250 of the battery pack shell 200 through two adhesive layers 130. Of course, in order to improve the fixing effect, the number of adhesive layers 130 can also be increased, or the position of the adhesive layer 130 and the distance between adjacent adhesive layers 130 can be adjusted. This embodiment does not limit this.

[0097] Illustratively, the adhesive layer 130 may be a block-shaped structure, which covers a portion of the surface of the flexible main body segment 110 and is connected to the side beam 230 or the middle cross beam 250 of the battery pack housing 200 .

[0098] For example, the adhesive layer 130 may be a strip structure extending along the X direction, and may be arranged on the flexible main body segment 110 at intervals along the Z direction.

[0099] It should be noted that the glue used in the adhesive layer 130 only needs to be able to stably adhere the glue-filled component 100 to the side beam 230 or the middle cross beam 250 of the battery pack shell 200 , and this embodiment does not limit it.

[0100] In addition, the flexible main section 110 can also be fixed to the side beam 230 or the middle cross beam 250 of the battery pack shell 200 in other ways, as long as the glue-filled part 100 can be stably fixed on the side beam 230 or the middle cross beam 250. This embodiment does not limit it here.

[0101] The present application also provides a battery pack housing 200, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, it includes a shell body 210 and the glue-filling part 100 in the above embodiment. The shell body 210 is provided with a receiving cavity 220 for placing the battery cell 300. When the battery cell 300 is placed in the receiving cavity 220, there is an assembly gap between the battery cell 300 and the cavity wall of the receiving cavity 220.

[0102] Specifically, for square cells, the accommodating cavity 220 is also rectangular. In this case, the two opposing walls of the accommodating cavity 220 can cooperate with adjacent cells to form an assembly gap. The glue potting component 100 is placed in the assembly gap, and the glue outlet 121 of the glue potting component 100 is connected to the assembly gap. That is, the glue potting component 100 can be fixed to the battery pack housing 200 by gluing or other means, and the glue overflowing from the glue outlet 121 can fill the assembly gap. The battery pack housing 200 can be a battery tray or a battery pack box.

[0103] The battery pack housing 200 further includes an adapter 240 , which is used to connect the glue potting equipment and the glue inlet 111 of the glue potting component 100 to deliver the potting glue in the glue potting equipment into the glue potting component 100 .

[0104] During use, the glue filling equipment is started and the potting glue is sent into the adapter 240, and the potting glue is sent into the glue filling component 100 through the glue inlet 111 through the adapter 240. After the glue filling component 100 is filled with glue, the excess glue overflows into the assembly gap through the glue outlet 121, that is, between the battery cell 300 and the side wall of the accommodating cavity 220, thereby filling the assembly gap between the battery cell 300 and the wall of the accommodating cavity 220, and providing a stable expansion restraint force for the battery cell 300, thereby improving the cycle life of the battery cell 300.

[0105] It should be noted that if Figure 6 、 Figure 9 、 Figure 10 and Figure 11 As shown, there can be multiple battery cells 300. In this case, they are first connected to each other to form a battery pack and then placed in the accommodating cavity 220. The edges of the battery cells 300 adjacent to the potting component 100 are filled with the assembly gap between them and the side walls of the accommodating cavity 220 by the potting glue and the potting component 100.

[0106] Of course, the adapter may not be provided, and a channel may be directly opened on the shell body 210 to connect the glue filling device and the glue inlet 111, which is not limited in this embodiment.

[0107] In actual applications, according to the use requirements of the battery pack, the battery pack shell 200 may be provided with one accommodating cavity 220 or multiple accommodating cavities 220 , and the battery cells 300 are placed in the accommodating cavities 220 accordingly.

[0108] Exemplarily, when only one accommodating cavity 220 is provided, two side beams 230 are provided on the shell body 210, and the two side beams 230 are respectively provided at both ends of the extension direction of the shell body 210, and the side beams 230 extend along the width direction of the battery pack shell 200. At this time, the two side beams 230 and the side walls of the shell body 210 enclose a accommodating cavity 220, and the two side beams 230 cooperate with adjacent battery cells 300 to form an assembly gap, that is, one or more glue filling parts 100 are fixed on the two side beams 230, and one or more adapters 240 are also provided on the side beams 230, and the glue filling parts 100 are connected to the adapters 240. After the battery cell 300 is placed in the accommodating cavity 220, it can be glued by glue filling equipment to fill the gap between the battery cell 300 adjacent to the side beam 230 and the side beam 230.

[0109] Exemplarily, the housing body 210 is provided with a plurality of accommodating cavities 220 , that is, two or more accommodating cavities 220 . The plurality of accommodating cavities 220 can be formed in at least the following two ways:

[0110] The first type is that the battery pack shell 200 also includes two side beams 230 and at least one middle cross beam 250. The side beams 230 and the middle cross beam 250 extend in the same direction. The two side beams 230 are respectively arranged at the two ends of the shell body 210, and the middle cross beam 250 is located between the two side beams 230. The two ends of the middle cross beam 250 are respectively connected to the side walls on both sides of the shell body 210 to separate the area between the two side beams 230 to form at least two accommodating cavities 220. That is, the two ends of the side beam 230 are connected to the two side walls of the shell body 210. Of course, the side beam 230 can also be fitted with the end wall of the shell body 210. In this case, the extension direction of the side beam 230 and the middle cross beam 250 is the same as the width direction of the shell body 210, so that the area of ​​the shell body 210 between the two side beams 230 is separated by the middle cross beam 250 to form at least two accommodating cavities 220.

[0111] Specifically, if only one middle crossbeam 250 is provided, the middle crossbeam 250 cooperates with a side beam 230 on each side to form a receiving cavity 220. If multiple middle crossbeams 250 are provided, the multiple middle crossbeams 250 are spaced apart between the two side beams 230 to form multiple receiving cavities 220.

[0112] The second type is that the battery pack shell 200 also includes at least one intermediate longitudinal beam 260. The extension direction of the intermediate longitudinal beam 260 is different from the extension direction of the intermediate cross beam 250. Usually, the angle between the intermediate longitudinal beam 260 and the intermediate cross beam 250 is about 90°, that is, the extension direction of the intermediate longitudinal beam 260 is the same as the extension direction of the shell body 210, and the two ends of the intermediate longitudinal beam 260 are respectively connected to the two side beams 230.

[0113] Among them, if multiple intermediate longitudinal beams 260 are set, they can be arranged in sequence between the two side walls of the shell body 210, and the intermediate cross beam 250 and the intermediate longitudinal beam 260 are staggered, which can divide the area of ​​the shell body 210 between the two side beams 230 into multiple accommodating cavities 220.

[0114] The specific configuration and size of the accommodating cavity 220 , that is, the interval between the middle cross beams 250 and the interval between the middle longitudinal beams 260 , can be adjusted according to actual needs.

[0115] Furthermore, when multiple accommodating cavities 220 are set, adapters 240 are provided on the middle crossbeam 250 and the side beams 230. The middle crossbeam 250 has two side surfaces adjacent to two different accommodating cavities 220 respectively, and glue filling parts 100 are provided on both side surfaces. The side beams 230 are adjacent to the accommodating cavities 220 and the glue filling parts 100 are provided, that is, the adapter 240 on the middle crossbeam 250 is connected to the glue filling part 100 fixed on the middle crossbeam 250 and the glue filling equipment, and the adapter 240 on the side beam 230 is connected to the glue filling part 100 fixed on the side beam 230 and the glue filling equipment, so that after the battery cell 300 is placed in the accommodating cavity 220, the assembly gap between the battery cell 300 and the side beam 230 or the middle crossbeam 250 can be quickly filled through the glue filling part 100.

[0116] The adapter 240 may be a connecting tube or other structure, as long as it can guide the potting glue from the potting equipment into the potting component 100 .

[0117] For example, see Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 10As shown, the adapter 240 includes a first inlet 241 and a first outlet 242 that are connected to each other. The first inlet 241 is used to connect to the glue potting equipment, and the first outlet 242 is used to connect to the glue potting component 100.

[0118] At this time, a corresponding adapter 240 is required for each glue-filled part 100. The adapter 240 can be a channel integrally formed on the side beam 230 or the middle cross beam 250, or it can be an external component fixed to the side beam 230 or the middle cross beam 250 by welding or bonding at a later stage. For example, the adapter 240 includes a main body 245, a first inlet 241 and a first outlet 242 are provided on the main body 245, and a mounting groove is provided on the middle cross beam 250 or the side beam 230. 245 is welded in the mounting groove, and a through hole connecting the mounting groove and the accommodating cavity 220 is provided on the side beam 230 or the middle cross beam 250, and the through hole is opposite to and connected with the first outlet 242. The first inlet 241 can be located at the top of the side beam 230 or the middle cross beam 250, and the first outlet 242 is located on the side wall of the middle cross beam 250 or the side beam 230. When the glue filling component 100 is fixed on the side beam 230 or the middle cross beam 250, the glue inlet 111 is just opposite to and connected with the first outlet 242.

[0119] For example, see Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, for the middle crossbeam 250, both sides thereof have a accommodating cavity 220, so both sides thereof need to be provided with a glue filling component 100. In order to facilitate connection, the adapter 240 provided on the middle crossbeam 250 may further include a second outlet 244, and the first outlet 242 and the second outlet 244 are respectively connected to the glue filling components 100 located on both sides of the middle crossbeam 250, that is, the first outlet 242 and the second outlet 244 are respectively provided on both sides of the middle crossbeam 250.

[0120] Among them, the second outlet 244 and the first outlet 242 can both be connected to the first inlet 241. During glue pouring, the potting glue entering the adapter 240 from the first inlet 241 will enter the first outlet 242 and the second outlet 244 at the same time, and then enter the glue pouring parts 100 located on both sides of the middle beam 250 respectively.

[0121] In actual applications, due to processing or installation errors, the sizes of the accommodating cavities 220 on both sides of the middle beam 250 may be different, and the potting glue entering from the first inlet 241 enters the first outlet 242 and the second outlet 244 at the same time, which may cause one of the potting parts 100 on both sides of the middle beam 250 to overflow with glue and the other to have insufficient glue.

[0122] At this time, the adapter 240 arranged on the middle beam 250 can also include a second inlet 243, the second inlet 243 is located at the top of the middle beam 250, the first inlet 241 is connected to the first outlet 242, and the second inlet 243 is connected to the second outlet 244, so that the glue-filling parts 100 on both sides of the middle beam 250 can be independently glue-filled, thereby facilitating the control of the glue-filling pressure so that the potting glue can evenly fill the glue-filling parts 100.

[0123] Of course, when the adapter 240 includes a first inlet 241, a first outlet 242, a second inlet 243 and a second outlet 244, in order to facilitate processing, a mounting groove can be opened on the middle crossbeam 250, and at the same time, through holes connected to the mounting groove are opened at positions corresponding to the first outlet 242 and the second outlet 244, and the through holes are also connected to the accommodating chamber 220. A first channel and a second channel are set on the main body 245 of the adapter 240, one end of the first channel is the first inlet 241, and the other end is the first outlet 242, one end of the second channel is the second inlet 243, and the other end is the second outlet 244. It is only necessary to fix the main body 245 in the mounting groove by common methods such as welding or bolt connection, and make the first outlet 242 and the second outlet 244 correspond to and be connected with the through holes on the middle crossbeam 250.

[0124] In actual use, in order to facilitate the connection of the glue filling equipment, the flow direction of the glue in the first channel and the second channel can be marked on the middle beam 250 by arrows, text, letters, etc., indicating which accommodating cavity 220 they correspond to respectively.

[0125] An embodiment of the present application further provides a battery pack, comprising a battery pack and the battery pack housing 200 in the above embodiment, wherein the battery pack is fixed on the battery pack housing 200 .

[0126] The structure after the battery pack and the battery pack housing 200 are assembled is as follows: Figure 11 As shown, the battery pack is composed of multiple battery cells 300 connected in parallel or in series, and each accommodating cavity 220 can be used to place a battery pack, wherein, as shown in FIG. Figure 6 、 Figure 9 、 Figure 10 As shown, there is a gap between the two sides of the battery pack and the side beams 230 or the middle cross beam 250. The glue filling component 100 is fixed to the side of the side beam 230 or the middle cross beam 250 adjacent to the battery pack, and is used to fill the gap between the battery pack and the middle cross beam 250 or the side beam 230 after glue filling.

[0127] Specifically, for the same battery pack, it includes a plurality of Figure 1 The plurality of battery cells 300 are stacked and arranged in a Y direction, and the extending direction of the potting member 100 is aligned with the extending direction of the battery cells 300 ( Figure 1The X direction in the first direction is the same as that in the second direction, and after the battery pack is placed in the accommodating cavity 220, the glue potting member 100 fills the gap between the end faces of the battery pack at both ends along the first direction and the battery pack shell 200, providing a stable expansion restraint force for the battery from the two end faces of the battery pack in the first direction.

[0128] Of course, the battery pack also includes other components such as a cover plate, a cooling system, and a battery management system, which are well known to those skilled in the art and will not be described in detail in this embodiment.

[0129] An embodiment of the present application further provides an electric device, comprising an electric device and the battery pack in the above embodiment, wherein the battery pack is used to supply power to the electric device.

[0130] Among them, electrical equipment includes but is not limited to electric vehicles, consumer electronics, energy storage systems, industrial equipment and other equipment.

[0131] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A glue-filled part (100), characterized in that: include: A flexible main body section (110), wherein a glue inlet (111) is provided on the flexible main body section (110), and the flexible main body section (110) is used to be connected to the battery pack housing (200); a flexible bending section (120), the flexible bending section (120) being formed by bending and extending from one end of the flexible main section (110), and a glue outlet (121) being provided on the flexible bending section (120); The flexible main section (110) and the flexible bending section (120) are both provided with mutually communicating accommodating cavities (112), and the glue inlet (111) and the glue outlet (121) are both communicated with the accommodating cavities (112); One end of the flexible bending section (120) facing away from the flexible main section (110) is parallel to the flexible main section (110).

2. The glue-filled part (100) according to claim 1, characterized in that: The projection of the flexible bending section (120) in the thickness direction of the flexible main section (110) coincides with the flexible main section (110).

3. The glue-filled part (100) according to claim 2, characterized in that: The flexible bending sections (120) are provided at both ends of the flexible main section (110).

4. The glue-filled part (100) according to claim 3, characterized in that: Along the extension direction of the flexible main body segment (110), the length of the flexible main body segment (110) is X, and the shortest distance between the center of the glue inlet (111) and the center of the glue outlet (121) in the extension direction of the flexible main body segment (110) is less than or equal to 0.7X and greater than or equal to 0.3X.

5. The glue-filled part (100) according to claim 4, characterized in that: Along the extension direction of the flexible main body section (110), the distance between the center of the glue inlet (111) and the centers of the two glue outlets (121) is equal.

6. The glue-filled part (100) according to claim 2, characterized in that: The flexible bending section (120) is provided at one end of the flexible main section (110), and the glue inlet (111) is provided at the other end of the flexible main section (110).

7. The glue-filled part (100) according to claim 1, characterized in that: The glue outlet (121) is located on one side of the flexible bending section (120) in the height direction of the glue-filling component (100).

8. The glue-filled part (100) according to claim 7, characterized in that: The length of the glue outlet (121) along the extension direction of the flexible main body section (110) is 2 mm to 25 mm.

9. The glue-filled part (100) according to claim 1, characterized in that: The glue outlet (121) is located at one end of the flexible bending section (120) away from the flexible main section (110).

10. The glue-filled part (100) according to any one of claims 1 to 9, characterized in that: The glue outlet (121) is a flow channel extending along the extension direction of the flexible main body section (110) or the height direction of the glue-filling component (100), and the size of the glue outlet (121) gradually decreases along the direction of glue outflow.

11. The glue-filled part (100) according to any one of claims 1 to 9, characterized in that: The bag also includes a first flexible film layer and a second flexible film layer that are arranged opposite to each other, wherein the first flexible film layer and the second flexible film layer are connected by hot pressing to form a bag body having the accommodation cavity (112) inside. At least one end of the bag body is bent to form the flexible bending section (120), and the remaining area of ​​the bag body forms the flexible main body section (110).

12. The glue-filled part (100) according to any one of claims 1 to 9, characterized in that: An adhesive layer (130) is also provided on the flexible main body section (110), and the adhesive layer (130) is used to be connected to the battery pack housing (200).

13. A battery pack housing (200), characterized in that: The invention comprises a shell body (210) and a glue potting member (100) according to any one of claims 1 to 12, wherein the shell body (210) is provided with a receiving cavity (220) for accommodating a battery cell (300), the glue potting member (100) is located in the receiving cavity (220), and the glue potting member (100) is used to fill the gap between the battery cell (300) and the cavity wall of the receiving cavity (220).

14. The battery pack housing (200) according to claim 13, characterized in that: It also includes an adapter (240) for connecting the glue potting device and the glue inlet (111) of the glue potting component (100) to feed the potting glue in the glue potting device into the glue potting component (100).

15. The battery pack housing (200) according to claim 14, characterized in that: Also includes: Two side beams (230), the two side beams (230) being respectively arranged at two ends of the shell body (210); at least one middle crossbeam (250), the middle crossbeam (250) and the side beams (230) extending in the same direction, the middle crossbeam (250) being located between the two side beams (230), and the two ends of the middle crossbeam (250) being respectively connected to the two sides of the shell body (210) to separate the area of ​​the shell body (210) located between the two side beams (230) to form at least two accommodating cavities (220); Wherein, at least one of the middle cross beam (250) and the side beam (230) is provided with the adapter (240), and at least one of the middle cross beam (250) and the side beam (230) is provided with the glue-filling part (100) on a side adjacent to the accommodating cavity (220).

16. The battery pack housing (200) according to claim 15, characterized in that: It also includes at least one middle longitudinal beam (260), the extension direction of the middle longitudinal beam (260) is different from the extension direction of the middle cross beam (250), and both ends of the middle longitudinal beam (260) are respectively connected to the two side beams (230); The middle cross beam (250) and the middle longitudinal beam (260) are arranged in an interlaced manner to separate the area of ​​the shell body (210) between the two side beams (230) to form a plurality of the accommodating cavities (220).

17. The battery pack housing (200) according to claim 15, characterized in that: The adapter (240) comprises a first inlet (241) and a first outlet (242) that are communicated with each other, wherein the first inlet (241) is used to connect to the glue pouring equipment, and the first outlet (242) is used to connect to the glue pouring component (100).

18. The battery pack housing (200) according to claim 17, characterized in that: The adapter (240) provided on the middle crossbeam (250) further includes a second outlet (244), and the second outlet (244) is communicated with the first inlet (241); Alternatively, the adapter (240) provided on the middle crossbeam (250) further includes a second inlet (243) communicating with the second outlet (244), the second inlet (243) being used to connect to the glue pouring device, and the first outlet (242) and the second outlet (244) being respectively connected to the glue pouring parts (100) located on both sides of the middle crossbeam (250).

19. A battery pack, characterized in that: The invention comprises a battery pack and a battery pack housing (200) according to any one of claims 13 to 16, wherein the battery pack is fixed on the battery pack housing (200).

20. The battery pack according to claim 19, wherein: The battery pack comprises a plurality of battery cells (300) stacked along a first direction, the extending direction of the glue potting member (100) is the same as the extending direction of the battery cells (300), and the glue potting member (100) is used to fill the gap between the end surfaces of both ends of the battery pack along the first direction and the battery pack shell (200).

21. An electrical device, characterized in that: It comprises an electrical device and the battery pack according to claim 19 or 20, wherein the battery pack is used to supply power to the electrical device.

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