Glue pouring piece, battery pack shell, battery pack and electric equipment

Abstract

The embodiment of the invention provides a glue pouring piece, a battery pack shell, a battery pack and electric equipment, and relates to the technical field of batteries, the glue pouring piece comprises a flexible main body section, the flexible main body section is provided with a glue inlet, and the flexible main body section is used for being connected with the shell of the battery pack; the flexible bending section is formed by bending and extending from one end of the flexible main body section, and a glue outlet is formed in the flexible bending section; wherein the flexible main body section and the flexible bending section are both provided with accommodating cavities which are communicated with each other, the glue inlet and the glue outlet are both communicated with the accommodating cavities, and during glue filling, the flexible bending section can increase the glue inlet resistance, so that the flexible main body section and the flexible bending section are uniformly expanded, and when the glue filling piece is used for filling a gap between a battery cell and a shell, the glue filling resistance is increased; stable expansion restraining force can be provided for the battery cell, and the problems that the cycle life is shortened or lithium precipitation occurs due to the fact that the battery cell is not stressed are solved.

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 filling bag to effectively connect the battery cell and the side beam.

[0003] When using a glue potting bag for glue potting, 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 potting.

[0004] However, in actual application, some areas of the glue filling bag are not effectively filled with glue, and different areas of the glue filling bag 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 section, the flexible main body section is provided with a glue inlet, and the flexible main body section is used to be connected to a battery pack housing;

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

[0008] 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 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 implementation, 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 extending direction of the flexible body section, the distance between the center of the glue inlet and the centers of the two glue outlets is equal.

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

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

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

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

[0017] In a possible implementation, the glue outlet is a flow channel extending along the extending direction of the flexible body section or the height direction of the potting member, and the size of the glue outlet gradually decreases along the direction of the glue flowing out.

[0018] In a possible implementation, it further includes a first flexible film layer and a second flexible film layer which are oppositely arranged, and the first flexible film layer and the second flexible film layer are thermally pressed and connected to form a bag body with the accommodating cavity inside;

[0019] Wherein 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 body section.

[0020] In a possible implementation, an adhesive layer is further provided on the flexible body section, and the adhesive layer is used for connecting with the battery pack housing.

[0021] In a second aspect, the present application provides a battery pack housing, including a housing body and the potting member according to any one of the first aspect, wherein a accommodating cavity for placing an electric core is provided on the housing body, the potting member is located in the accommodating cavity, and the potting member is used for filling the gap between the electric core and the cavity wall of the accommodating cavity.

[0022] In a possible implementation, it further includes an adapter, and the adapter is used for connecting a potting device and the glue inlet of the potting member to send the potting glue in the potting device into the potting member.

[0023] In a possible implementation, it further includes two side beams and at least one intermediate cross beam. The side beams and the intermediate cross beam extend in the same direction. The two side beams are respectively arranged at both ends of the housing body, and the intermediate cross beam is located between the two side beams. Both ends of the intermediate cross beam are respectively connected to both sides of the housing body to divide the area of the housing body between the two side beams to form at least two accommodation cavities;

[0024] Wherein, at least one of the intermediate cross beam and the side beam is provided with the adapter, and at least one of the intermediate cross beam and the side beam is provided with the potting member on the side adjacent to the accommodation cavity.

[0025] In a possible implementation, it further includes at least one intermediate longitudinal beam. The intermediate longitudinal beam extends in a direction different from that of the intermediate cross beam, and both ends of the intermediate longitudinal beam are respectively connected to the two side beams;

[0026] Wherein, the intermediate cross beam and the intermediate longitudinal beam are arranged in a staggered manner to divide the area of the housing body between the two side beams to form a plurality of accommodation cavities.

[0027] In a possible implementation, the adapter includes a first inlet and a first outlet that communicate with each other. The first inlet is used to connect to the potting equipment, and the first outlet is used to connect to the potting member.

[0028] In a possible implementation, the adapter provided on the intermediate cross beam further includes a second outlet, and the second outlet communicates with the first inlet;

[0029] Or the adapter provided on the intermediate cross beam further includes a second inlet that communicates with the second outlet, and the second inlet is used to connect to the potting equipment;

[0030] Wherein, the first outlet and the second outlet are respectively connected to the potting members located on both sides of the intermediate cross beam.

[0031] In a third aspect, the present application provides a battery pack, including a battery pack and the battery pack housing according to any one of the second aspect, and the battery pack is fixed on the battery pack housing.

[0032] In a possible implementation, the battery pack includes a plurality of battery cells stacked in a first direction. The potting member extends in the same direction as the battery cells, and the potting member is used to fill the gaps between the end faces of both ends of the battery pack along the first direction and the battery pack housing.

[0033] Fourthly, the present application provides an electrical device, including an electrical device and the battery pack described in the third aspect, and the battery pack is used to supply power to the electrical device.

[0034] In the potting member, battery pack housing, battery pack and electrical device provided by the embodiments of the present application, by providing a flexible main body section and a flexible bending section in the potting member, the flexible bending section is bent and extended from one end of the flexible main body section, and accommodating cavities communicating with each other are provided on both the flexible main body section and the flexible bending section. An inlet for potting glue is provided on the flexible main body section, and an outlet for potting glue is provided on the flexible bending section. The potting glue enters the accommodating cavity on the flexible main body section from the inlet for potting glue, and gradually enters the accommodating cavity on the flexible bending section after filling the accommodating cavity on the main body portion. At the connection between the flexible bending section and the flexible main body section, a bend occurs, increasing the resistance for the potting glue to reach the outlet for potting glue. As a result, the potting glue preferentially fills the entire potting member before overflowing from the outlet for potting glue, making the potting glue evenly filled in the potting member and the potting member bulge evenly. Therefore, when filling the gap between the battery cell and the battery pack housing through the potting member, uniform filling of the gap can be achieved, thereby providing a stable expansion restraint force for the battery cell. Description of the Drawings

[0035] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application and used together with the description to explain the principles of the present application.

[0036] Figure 1 Schematic front view structure of the potting member provided by the present application;

[0037] Figure 2 Schematic back view structure of the potting member provided by the present application;

[0038] Figure 3 Cross-sectional view of a partial area of the potting member provided by the present application;

[0039] Figure 4 Enlarged view of a partial structure of the potting member provided by the present application;

[0040] Figure 5 Schematic structure diagram of another embodiment of the potting member provided by the present application;

[0041] Figure 6 Schematic structure diagram of the battery pack housing provided by the present application;

[0042] Figure 7 For Figure 6 Enlarged schematic view of the structure within circle A in

[0043] Figure 8 Schematic structure diagram of the adapter in the battery pack housing provided by the present application;

[0044] Figure 9 Schematic diagram of the assembly process of the battery pack housing and the battery cell provided by this application;

[0045] Figure 10 is Figure 9 an enlarged schematic diagram of the structure within circle B in

[0046] Figure 11 Assembly drawing of the battery pack housing and the battery cell provided by this application.

[0047] Reference numerals:

[0048] 100 - Glue filling part; 110 - Flexible main body section; 111 - Glue inlet; 112 - Accommodating cavity; 120 - Flexible bending section; 121 - Glue outlet; 130 - Adhesive glue 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 part; 250 - Intermediate cross beam; 260 - Intermediate longitudinal beam;

[0050] 300 - Battery cell.

[0051] Through the above - mentioned drawings, specific embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed description of specific embodiments

[0052] Here, exemplary embodiments will be described in detail, and their examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0053] In the related art, the common glue - filling schemes for the glue - filling bag used to fill the gap between the battery cell and the battery pack housing are as follows:

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

[0055] When using the above - mentioned method, the potting glue will flow out rapidly when approaching the glue outlet, resulting in the glue - filling bag in the area near the glue outlet not being fully filled, and it is easy to occur that some areas of the glue - filling bag are filled while other areas are lacking glue during the filling process.

[0056] In this regard, the present application provides a potting member. By providing a flexible main body section and a flexible bending section, the glue inlet and the glue outlet are respectively arranged on the flexible main body section and the flexible bending section, effectively increasing the resistance of the glue outlet, enabling the potting glue to be evenly filled in the potting member, so that the potting member can expand evenly, thereby effectively solving the problem of uneven filling of the potting bag in the prior art.

[0057] It should be noted that the potting member in the present application is mainly applied to a battery pack. During the production process of the battery pack, the potting member is directly fixed on the housing of the battery pack, which can effectively fill the gap between the battery cell and the housing, 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 not being stressed.

[0058] The electrical equipment using the above battery pack includes, but is not limited to, various equipment such as electric vehicles, consumer electronics products, energy storage systems, and industrial equipment.

[0059] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. These 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 with reference to the accompanying drawings.

[0060] An embodiment of the present application provides a potting member 100, as Figure 6 、 Figure 9 and Figure 10 described, which is mainly used to fill the gap between the battery cell 300 and the battery pack housing 200 by filling potting glue. Among them, the battery pack housing 200 can be a structure such as a battery tray or a battery pack box. Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown. The potting member 100 includes a flexible main body section 110 and a flexible bending section 120. The flexible bending section 120 is bent and extended from one end of the flexible main body section 110, and accommodation cavities 112 are provided inside both the flexible main body section 110 and the flexible bending section 120. The accommodation cavities 112 are used to accommodate potting glue. The accommodation cavities 112 of the flexible main body section 110 and the flexible bending section 120 are interconnected, and after the accommodation cavities 112 are filled with potting glue, the flexible main body section 110 and the flexible bending section 120 can expand evenly.

[0061] Exemplarily, the potting member 100 as a whole can be a strip-shaped flexible bag body, and its end is bent to form the flexible bending section 120, while the unbent area is the flexible main body section 110.

[0062] Specifically, the potting member 100 includes a first flexible film layer and a second flexible film layer that are oppositely arranged. The first flexible film layer and the second flexible film layer are thermally pressed and connected to form a bag body with the accommodating cavity therein. Then, the end of the bag body is bent to form a flexible bending section and a flexible main body section.

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

[0064] Of course, the potting member 100 can also be a flexible bag body of other shapes, which can be specifically 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 body can be prepared in any way. For example, the first flexible film layer and the second flexible film layer are two independent PE films, and the two are sealed at the edges by thermal pressing to form a strip-shaped bag body, and an accommodating cavity 112 is formed between the first flexible film layer and the second flexible film layer. Or the first flexible film layer and the second flexible film layer are of an integral structure during production, and only the two ends are not connected, that is, the two form a cylindrical structure with only two open ends, and thermal pressing is performed at the two open ends. This embodiment does not limit it here.

[0065] Among them, a glue inlet 111 is provided on the flexible main body section 110. The glue inlet 111 is used to connect to a potting device for injecting glue. A glue outlet 121 is provided on the flexible bending section 120. The glue outlet 121 is used to overflow the excess glue outside the potting member 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 body section 110, and then enters the flexible bending section 120 through the bending area. The flexible bending section 120 is bent from one end of the flexible main body 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 potting member 100 bulge evenly. After the potting member 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, which can make there be no bubbles inside the potting member 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 both ends in the thickness direction of the flexible main body section 110.

[0068] Specifically, among the two ends of the flexible main body section 110 in the thickness direction, that is, the two large surfaces of the flexible main body section, one needs to be connected to the battery pack housing 200, and the other is adjacent to the battery cell 300. The glue inlet 111 is arranged on the side connected to the battery pack housing 200, and the glue outlet 121 is arranged 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 member 100.

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

[0070] Exemplarily, the potting member 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 the flexible bending section 120, and the non-bent area of the bag body is the flexible main body section 110. 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, so that the overall length of the final potting member 100 in the X direction is the length of the flexible main body 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 body section 110. On the one hand, the clearance value between the battery cell 300 and the battery pack housing 200 is limited. The flexible bending section 120 is bent 180° relative to the flexible main body section 110, compared with bending 120° or other angles, it can reduce the space occupied by it in the Y direction, so that when the potting member 100 is placed in the battery pack housing 200, it can play a role in saving space. On the other hand, the flexible bending section 120 is bent 180° relative to the flexible main body section 110, which can also effectively increase the potting resistance and avoid the problem of partial glue running in the bending area, so that the potting bag can bulge evenly after injecting glue.

[0072] It should be noted that the flexible bending section 120 can also be bent at other angles relative to the flexible main body section 110, as long as it can effectively increase the glue injection resistance and make the potting glue evenly fill the accommodation cavity 112. This embodiment does not limit it here.

[0073] Exemplarily, the potting member is a bag body extending along the X direction, the thickness direction of the bag body is the Y direction, 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, finally making the flexible bending section 120 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 glue inlet resistance can be effectively increased through multiple bends of the transition section.

[0074] Exemplarily, the potting member 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 it is bent 180° along the Y direction at a corner of the bag body to form a flexible bending section 120, while the remaining part is a flexible main body section 110. The glue inlet 111 is arranged at the corner where the bag body is bent.

[0075] It should be noted that the above examples are only for illustrating the structures of the flexible bending section 120 and the flexible main body section 110, rather than for limitation, and other common methods are also acceptable.

[0076] Among them, the flexible bending section 120 can be arranged only at one end of the flexible main body section 110, or can be arranged at both ends of the flexible main body section 110.

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

[0078] At this time, the potting glue enters the installation cavity from the glue inlet 111 on the flexible main body section 110, then shunts and flows towards both ends, gradually filling the accommodation cavity 112, and the excess glue overflows through the glue outlet 121 at both ends, making the potting member 100 expand uniformly.

[0079] Furthermore, in order to improve the filling effect, along the extension direction of the flexible main body section, the length of the flexible main body section 110 can be X (the length of the flexible main body section 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 distances between the glue inlet 111 and the glue outlets 121 at both ends are appropriate, which is convenient for the potting glue to fill the potting member 100.

[0081] It should be noted that, please refer to Figure 1 、 Figure 2 and Figure 4 As shown, the glue inlet 111 can be located in the middle of the flexible main body section 110 in the Z direction, or can be located at the edge. This embodiment does not limit it here.

[0082] In addition, to improve the potting effect, the distance between the center of the glue inlet 111 and the centers of the glue outlet 121 at both ends can be made equal.

[0083] For example, as Figure 4 shown, taking the potting 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 potting part 100 in the height direction. 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 a small pressure at the glue outlet 121, and the potting glue is likely to overflow, making the glue outlet 121 area unable to expand evenly.

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

[0085] Among them, the length of the flexible bending section 120 can be adjusted according to the actual situation as long as the glue outlet 121 can be set. The distance between the glue outlet 121 and the glue inlet 111 can also be adjusted according to the actual situation, and this embodiment does not limit it here.

[0086] Exemplarily, a flexible bending section 120 is provided at one end of the flexible main body section 110, and a glue inlet 111 is provided at the other end of the flexible main body section 110, that is, only one end of the flexible main body section 110 is provided with the flexible bending section 120. After the potting glue entering the potting part 100 from the glue inlet 111 fills the entire potting part 100, it then 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] Exemplarily, as Figure 4 shown, the glue outlet 121 is located on one side of the flexible bending section 120 in the height direction of the potting part 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 the 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 and overflow from the glue outlet 121 at the top of the flexible bending section 120 in the Z direction, so as to further increase the glue outlet resistance in the glue outlet 121 area and make the potting glue evenly fill the flexible bending section 120.

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

[0091] Specifically, when the flexible main body section 110 is integrally bent at one end to form the flexible bending section 120, the glue outlet 121 is located on the side of the flexible bending section 120 extending in the Z direction. When only one corner of the flexible main body section 110 is bent to form the flexible bending section 120, the glue outlet 121 can be arranged 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 flow. Specifically, the glue outlet 121 is a flow channel with a certain depth, and this channel extends along the extension direction (X direction) of the flexible bending section 120 or the height direction (Z direction) of the potting member 100, and the cross-sectional area of the flow channel gradually decreases along the direction of glue flow.

[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 horn-shaped structure. At this time, the resistance at the glue outlet 121 will be further increased, thereby improving the uniformity of the expansion of the potting member 100.

[0094] It should be noted that the glue outlet 121 can also be set to other shapes as long as it can increase the glue outlet resistance.

[0095] In some embodiments, please refer to Figure 1 、 Figure 5 、 Figure 6 and Figure 9 As shown, on the side of the flexible main body section 110 where the glue inlet 111 is provided, there is also an adhesive layer 130, and the adhesive layer 130 is used to connect with the battery pack housing 200.

[0096] Exemplarily, taking the example of being fixed on the battery pack housing 200, the adhesive layer 130 can be a strip-shaped structure extending in the Z direction. At this time, one strip can be provided at each end of the flexible main body section 110, and the flexible main body section 110 is fixed on the side beam 230 or the middle cross beam 250 of the battery pack housing 200 through the two adhesive layers 130. Of course, in order to improve the fixing effect, the number of the 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 it here.

[0097] Exemplarily, the adhesive layer 130 can be a block-shaped structure that covers a part of the surface of the flexible main body section 110 and is connected to the side beam 230 or the middle cross beam 250 of the battery pack housing 200.

[0098] Exemplarily, the adhesive layer 130 can be a strip-shaped structure extending in the X direction and can be arranged at intervals along the Z direction on the flexible main body section 110.

[0099] It should be noted that the glue used for the bonding glue layer 130 only needs to be able to stably paste the potting member 100 on the side beam 230 or the middle cross beam 250 of the battery pack housing 200, and this embodiment does not limit it here.

[0100] In addition, the flexible main body section 110 can also be fixed to the side beam 230 or the middle cross beam 250 of the battery pack housing 200 in other ways, as long as the potting member 100 can be stably fixed on the side beam 230 or the middle cross beam 250, and this embodiment does not limit it here.

[0101] The embodiment of the present application also provides a battery pack housing 200. Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, it includes a housing body 210 and the potting member 100 in the above embodiment. A receiving cavity 220 for placing the battery cells 300 is provided on the housing body 210. When the battery cells 300 are placed in the receiving cavity 220, there is an assembly gap between the battery cells 300 and the cavity wall of the receiving cavity 220.

[0102] Specifically, for square battery cells, the receiving cavity 220 is also rectangular. At this time, it is possible to make both cavity walls of the receiving cavity 220 adjacent to the battery cells form an assembly gap. At this time, the potting member 100 is placed in the assembly gap, and the glue outlet 121 of the potting member 100 communicates with the assembly gap. That is, the potting member 100 can be fixed on the battery pack housing 200 by means of glue bonding, etc., and the glue overflowing from the glue outlet 121 can fill the assembly gap. Among them, the battery pack housing 200 can be a battery tray or a battery pack box and other structures.

[0103] The battery pack housing 200 also has an adapter 240. The adapter 240 is used to connect the potting device and the glue inlet 111 of the potting member 100 to send the potting glue in the potting device into the potting member 100.

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

[0105] It should be noted that as Figure 6 、 Figure 9 、Figure 10 and Figure 11 As shown in Figure 11 , 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 accommodation cavity 220. The gaps between the side walls of the accommodation cavity 220 and the edges of the battery cells 300 adjacent to the potting member 100 are filled with potting glue and the potting member 100.

[0106] Of course, the adapter can also be not provided, and a channel can be directly opened on the housing body 210 to connect the potting device and the glue inlet 111. This embodiment does not limit it here.

[0107] In practical applications, according to the usage requirements of the battery pack, there may be one or more accommodation cavities 220 provided in the battery pack housing 200, and the battery cells 300 are correspondingly placed in the accommodation cavities 220.

[0108] Exemplarily, when only one accommodation cavity 220 is provided, there are two side beams 230 provided on the housing body 210. The two side beams 230 are respectively arranged at both ends in the extending direction of the housing body 210, and the side beams 230 extend along the width direction of the battery pack housing 200. At this time, an accommodation cavity 220 is formed by enclosing between the two side beams 230 and the side walls of the housing body 210. Both of the two side beams 230 cooperate with the adjacent battery cells 300 to form an assembly gap, that is, one or more potting members 100 are fixed on both of the two side beams 230. At the same time, one or more adapters 240 are also provided on the side beams 230, and the potting member 100 is connected to the adapter 240. After the battery cells 300 are placed in the accommodation cavity 220, potting can be performed through a potting device, so as to fill the gap between the battery cells 300 adjacent to the side beams 230 and the side beams 230.

[0109] Exemplarily, there are multiple accommodation cavities 220 provided on the housing body 210, that is, two or more accommodation cavities 220. The multiple accommodation cavities 220 can be formed by at least the following two methods: First, the battery pack housing 200 further includes two side beams 230 and at least one intermediate cross beam 250. The extending directions of the side beams 230 and the intermediate cross beam 250 are the same. The two side beams 230 are respectively arranged at both ends of the housing body 210, and the intermediate cross beam 250 is located between the two side beams 230. Both ends of the intermediate cross beam 250 are respectively connected to the side walls on both sides of the housing body 210 to divide the area between the two side beams 230 to form at least two accommodation cavities 220. That is, both ends of the side beam 230 are connected to the two side walls of the housing body 210. Of course, the side beam 230 can also be attached to the end wall of the housing body 210. At this time, the extending directions of the side beam 230 and the intermediate cross beam 250 are the same as the width direction of the housing body 210, so as to divide the area of the housing body 210 between the two side beams 230 through the intermediate cross beam 250 to form at least two accommodation cavities 220.

[0110] Specifically, if only one middle crossbeam 250 is provided, each side of the middle crossbeam 250 cooperates with one side beam 230 to form a receiving cavity 220. If multiple middle crossbeams 250 are provided, the multiple middle crossbeams 250 are arranged at intervals between the two side beams 230, and multiple receiving cavities 220 can be formed.

[0111] Second, the battery pack housing 200 further includes at least one middle longitudinal beam 260. The extending direction of the middle longitudinal beam 260 is different from that of the middle crossbeam 250. Generally, the included angle between the middle longitudinal beam 260 and the middle crossbeam 250 is about 90°, that is, the extending direction of the middle longitudinal beam 260 is the same as that of the housing body 210, and both ends of the middle longitudinal beam 260 are respectively connected to the two side beams 230.

[0112] Among them, if multiple middle longitudinal beams 260 are provided, they can be arranged at intervals in turn between the two side walls of the housing body 210. The middle crossbeam 250 and the middle longitudinal beam 260 are arranged in a staggered manner, and the area of the housing body 210 between the two side beams 230 can be divided into multiple receiving cavities 220.

[0113] The specific setting method and size of the receiving cavity 220, that is, the intervals between the middle crossbeams 250 and the intervals between the middle longitudinal beams 260, can be adjusted according to actual needs.

[0114] Furthermore, when multiple receiving cavities 220 are provided, transfer members 240 are provided on both the middle crossbeam 250 and the side beam 230. The middle crossbeam 250 has two sides adjacent to two different receiving cavities 220, and glue injection members 100 are provided on both sides. A glue injection member 100 is provided on the side of the side beam 230 adjacent to the receiving cavity 220. That is, the transfer member 240 on the middle crossbeam 250 connects and fixes the glue injection member 100 on the middle crossbeam 250 to the glue injection equipment, and the transfer member 240 on the side beam 230 connects and fixes the glue injection member 100 on the side beam 230 to the glue injection equipment, so as to quickly fill the assembly gap between the battery cell 300 and the side beam 230 or the middle crossbeam 250 through the glue injection member 100 after the battery cell 300 is placed in the receiving cavity 220.

[0115] Among them, the transfer member 240 can be a connecting pipe or other structures, as long as it can guide the potting glue from the glue injection equipment into the glue injection member 100.

[0116] Exemplarily, please refer to 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 in communication with each other. The first inlet 241 is used to connect to a potting device, and the first outlet 242 is used to connect to the potting member 100.

[0117] At this time, one adapter 240 needs to be provided for each potting member 100. The adapter 240 can be a channel integrally formed on the side beam 230 or the middle cross beam 250, or an external component fixed to the side beam 230 or the middle cross beam 250 by means of welding or bonding at a later stage. For example, the adapter 240 includes a main body portion 245, and the first inlet 241 and the first outlet 242 are provided on the main body portion 245. An installation groove is provided on the middle cross beam 250 or the side beam 230, and the main body portion 245 is welded in the installation groove. A through hole communicating the installation groove and the accommodation cavity 220 is provided on the side beam 230 or the middle cross beam 250, and the through hole is opposite to and communicated 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 potting member 100 is fixed to the side beam 230 or the middle cross beam 250, the glue inlet 111 is just opposite to and communicated with the first outlet 242.

[0118] Exemplarily, please refer to Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, for the middle cross beam 250, accommodation cavities 220 are provided on both opposite sides thereof. Therefore, potting members 100 need to be provided on both opposite sides. For the convenience of connection, the adapter 240 provided on the middle cross beam 250 can further include a second outlet 244. The first outlet 242 and the second outlet 244 are respectively connected to the potting members 100 located on both sides of the middle cross beam 250, that is, the first outlet 242 and the second outlet 244 are respectively provided on both sides of the middle cross beam 250.

[0119] Wherein, the second outlet 244 and the first outlet 242 can both be in communication with the first inlet 241. During potting, the potting glue entering the adapter 240 from the first inlet 241 will enter the first outlet 242 and the second outlet 244 simultaneously, and then enter the potting members 100 located on both sides of the middle cross beam 250 respectively.

[0120] In practical applications, due to processing or installation errors, there may be differences in the sizes of the accommodation cavities 220 on both sides of the middle cross beam 250. The potting glue entering from the first inlet 241 enters the first outlet 242 and the second outlet 244 simultaneously, which may cause a problem that one of the potting members 100 on both sides of the middle cross beam 250 overflows glue and the other has insufficient glue amount.

[0121] At this time, the adapter 240 provided on the middle cross beam 250 may further include a second inlet 243. The second inlet 243 is located at the top of the middle cross beam 250. The first inlet 241 is communicated with the first outlet 242, and the second inlet 243 is communicated with the second outlet 244. Thus, the potting members 100 on both sides of the middle cross beam 250 are potted independently, which is convenient for controlling the potting pressure and enabling the potting adhesive to uniformly fill the potting members 100.

[0122] Certainly, when the adapter 240 includes the first inlet 241, the first outlet 242, the second inlet 243 and the second outlet 244, for the convenience of processing, an installation groove may be opened on the middle cross beam 250, and through holes communicating with the installation groove are opened at the positions corresponding to the first outlet 242 and the second outlet 244. The through holes are also communicated with the accommodating cavity 220. A first channel and a second channel are provided on the main body portion 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 only needs to fix the main body portion 245 in the installation groove in common ways such as welding or bolt connection, and make the first outlet 242 and the second outlet 244 correspond to and communicate with the through holes on the middle cross beam 250.

[0123] In the actual use process, for the convenience of connecting the potting equipment, the flow directions of the glue in the first channel and the second channel may also be marked on the middle cross beam 250 by arrows, words, letters, etc., to indicate which accommodating cavity 220 each of them corresponds to.

[0124] The embodiment of the present application further provides a battery pack, including a battery pack and the battery pack housing 200 in the above embodiment. The battery pack is fixed on the battery pack housing 200.

[0125] Among them, the structure after the battery pack is assembled with the battery pack housing 200 is as Figure 11 shown. The battery pack is composed of a plurality of battery cells 300 connected in parallel or in series. One battery pack can be placed in each accommodating cavity 220. Among them, as Figure 6 、 Figure 9 、 Figure 10 shown, there are gaps between both sides of the battery pack and the side beams 230 or the middle of the middle cross beam 250. The potting members 100 are fixed on the side adjacent to the battery pack of the side beams 230 or the middle cross beam 250, and are used to fill the gaps between the battery pack and the middle cross beam 250 or the side beams 230 after potting.

[0126] Specifically, for the same battery pack, it includes a plurality of battery cells 300 stacked in a first direction ( Figure 1 the Y direction in Figure 1in the X direction), and after the potting member 100 is placed inside the accommodation cavity 220 of the battery pack, it fills the gaps between the end faces of both ends of the battery pack along the first direction and the battery pack housing 200, and provides a stable expansion restraint force for the battery on the two end faces of the battery pack along the first direction.

[0127] 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 are not elaborated herein in this embodiment.

[0128] An embodiment of the present application further provides an electrical device, including an electrical device and the battery pack in the above embodiment, and the battery pack is used to supply power to the electrical device.

[0129] Among them, the electrical device includes, but is not limited to, various devices such as electric vehicles, consumer electronics products, energy storage systems, and industrial equipment.

[0130] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other implementation manners of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A potted 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 a battery pack housing (200); A flexible bending section (120), the flexible bending section (120) is formed by bending and extending from one end of the flexible main section (110), and a glue outlet (121) is provided on the flexible bending section (120); The flexible main section (110) and the flexible bending section (120) are both provided with mutually connected accommodating cavities (112), and the glue inlet (111) and the glue outlet (121) are both connected to the accommodating cavity (112).

2. The potted part (100) according to claim 1, characterized in that, 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).

3. The potting member (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 potting member (100) according to claim 3, wherein 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 potting member (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 potting member (100) according to claim 2, wherein 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 potted 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 potting member (100) according to claim 7, wherein The length of the glue outlet (121) along the extension direction of the flexible main body section (110) is 2 mm-25 mm.

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

10. The potting member (100) according to any one of claims 1-9, 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-filled component (100), and the size of the glue outlet (121) gradually decreases along the direction in which the glue flows out.

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

12. The potted part (100) according to any one of claims 1-9, characterized in that, The flexible main body section (110) is also provided with an adhesive layer (130), 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, It includes a housing body (210) and the potting member (100) described in any one of claims 1-12. A receiving cavity (220) for placing an electric core (300) is provided on the housing body (210). The potting member (100) is located within the receiving cavity (220), and the potting member (100) is used to fill the gap between the electric core (300) and the cavity wall of the receiving cavity (220).

14. The battery pack housing (200) according to claim 13, characterized in that, It further includes an adapter (240). The adapter (240) is used to connect a potting device and the glue inlet (111) of the potting member (100) to feed the potting glue in the potting device into the potting member (100).

15. The battery pack housing (200) according to claim 14, characterized in that, It further includes: Two side beams (230) are respectively provided at both ends of the housing body (210); At least one intermediate cross beam (250). The extending direction of the intermediate cross beam (250) is the same as that of the side beam (230). The intermediate cross beam (250) is located between the two side beams (230), and both ends of the intermediate cross beam (250) are respectively connected to both sides of the housing body (210) to divide the area of the housing body (210) between the two side beams (230) to form at least two receiving cavities (220); Wherein, at least one of the intermediate cross beam (250) and the side beam (230) is provided with the adapter (240), and the potting member (100) is provided on at least one of the intermediate cross beam (250) and the side beam (230) on the side adjacent to the receiving cavity (220).

16. The battery pack housing (200) according to claim 15, characterized in that, It further includes at least one intermediate longitudinal beam (260). The extending direction of the intermediate longitudinal beam (260) is different from that of the intermediate cross beam (250), and both ends of the intermediate longitudinal beam (260) are respectively connected to the two side beams (230); Wherein, the intermediate cross beam (250) and the intermediate longitudinal beam (260) are arranged in an intersecting manner to divide the area of the housing body (210) between the two side beams (230) to form a plurality of receiving cavities (220).

17. The battery pack housing (200) according to claim 15, characterized in that, The adapter (240) includes a first inlet (241) and a first outlet (242) that are interconnected. The first inlet (241) is used to connect to the potting device, and the first outlet (242) is used to connect to the potting member (100).

18. The battery pack housing (200) according to claim 17, characterized in that, The adapter (240) provided on the intermediate cross beam (250) further includes a second outlet (244). The second outlet (244) is in communication with the first inlet (241); Or the adapter (240) provided on the intermediate cross beam (250) further includes a second inlet (243) that is in communication with the second outlet (244). The second inlet (243) is used to connect to the potting device, and the first outlet (242) and the second outlet (244) are respectively connected to the potting members (100) on both sides of the intermediate cross beam (250).

19. A battery pack, characterized in that, Comprising a battery pack and a battery pack housing (200) as described in any one of claims 11-16, the battery pack being fixed on the battery pack housing (200).

20. The battery pack according to claim 19, characterized in that, The battery pack includes a plurality of battery cells (300) stacked in a first direction, the extension direction of the potting member (100) being the same as the extension direction of the battery cells (300), and the potting member (100) being used to fill the gaps between the end faces of both ends of the battery pack in the first direction and the battery pack housing (200).

21. An electrical device, characterized in that, Comprising an electrical device and a battery pack as described in claim 19 or 20, the battery pack being used to supply power to the electrical device.

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