Battery pack and electric equipment

Abstract

The battery pack is provided with a first direction and a second direction which are perpendicular to each other, the battery pack comprises a box body, a battery cell group and a glue injection channel, the box body is provided with a containing cavity, the battery cell group is arranged in the containing cavity and connected with the box body, the battery cell group and the box body are spaced in the second direction to form a filling gap, and the glue injection channel is arranged in the box body. The glue injection channel is provided with a glue injection port and a glue outlet, the glue outlet is communicated with the filling gap, the battery pack is provided with a projection plane perpendicular to the first direction, and the orthographic projection of the outline of the glue injection port on the projection plane along the first direction is at least partially overlapped with the orthographic projection of the channel wall of the glue injection channel on the projection plane along the first direction. The glue can be buffered through the channel wall, so that the impact of the glue on the battery cell group can be reduced, the flowing speed of the glue can be reduced, the possibility that bubbles appear due to the high flowing speed of the glue is reduced, the bubbles in the cured glue are reduced, and the glue injection quality is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] In related technologies, adhesive (such as potting compound, structural adhesive, etc.) is used to fill the space between the battery pack casing and the cell module. After the adhesive cures, it can improve the structural strength of the battery pack.

[0003] However, existing battery packs may develop air bubbles in the glue during the filling process, affecting the strength of the cured glue and thus the structural strength of the battery pack. Summary of the Invention

[0004] This application aims to provide a battery pack and electrical device that can solve the problem that when filling the existing battery pack with adhesive, air bubbles may appear in the adhesive, affecting the strength of the adhesive after curing.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a battery pack having a first direction and a second direction perpendicular to each other, comprising: a housing, a cell assembly, and an injection channel. The housing has a receiving cavity, the cell assembly is disposed in the receiving cavity and connected to the housing, the cell assembly and the housing are spaced apart along the second direction to form a filling gap, the injection channel is disposed in the housing, the injection channel has an injection port and an outlet, the outlet communicates with the filling gap, the battery pack has a projection plane perpendicular to the first direction, and the orthographic projection of the outline of the injection port along the first direction onto the projection plane at least partially overlaps with the orthographic projection of the channel wall of the injection channel along the first direction onto the projection plane.

[0006] Optionally, the injection direction of the glue injection port and the dispensing direction of the glue outlet intersect.

[0007] Optionally, the glue injection channel includes a flow guiding cavity and a buffer cavity. The glue injection port is located on one side of the flow guiding cavity along the first direction and communicates with the flow guiding cavity. The glue outlet is located on one side of the flow guiding cavity along the second direction and communicates with the flow guiding cavity. The buffer cavity is located on the side of the flow guiding cavity opposite to the glue outlet and communicates with the flow guiding cavity.

[0008] Optionally, the channel wall is disposed toward the glue injection port, and the distance between the channel wall and the glue injection port gradually increases along the second direction from the buffer cavity to the glue outlet.

[0009] Optionally, the dispensing port extends beyond the filling gap and faces the box body in the second direction to one side.

[0010] Optionally, the battery pack has a third direction perpendicular to the first direction and the second direction, and the filling gap extends along the third direction; the glue injection channel is provided in multiple ways, and the multiple glue injection channels are arranged at intervals along the third direction.

[0011] Optionally, the battery pack further includes a sealing element disposed between the housing and the cell assembly, the sealing element connecting the housing and the cell assembly, and the housing, the sealing element, and the cell assembly forming the filling gap.

[0012] Optionally, the battery pack has a third direction perpendicular to the first direction and the second direction, the filling gap extends along the third direction, and the glue injection channel is provided in multiple ways, with the multiple glue injection channels arranged at intervals along the third direction; The sealing element is provided in multiple ways, and the multiple sealing elements are spaced apart along the third direction. The multiple sealing elements separate the filling gap to form multiple sub-gap, and each sub-gap corresponds to a glue injection channel.

[0013] Optionally, the enclosure includes a main body and a sealing plate. The main body is provided with a plurality of stiffening plates on the side facing the battery cell assembly. One end of the plurality of stiffening plates is connected to the main body, and the other end of the plurality of stiffening plates extends toward the battery cell assembly. The plurality of stiffening plates are arranged crosswise and connected to each other. The sealing plate is connected to the stiffening plates, and the sealing plate, the sealing element, and the battery cell assembly enclose and form the filling gap.

[0014] Optionally, the stiffener plate is provided with a positioning groove, and the sealing plate is embedded in the positioning groove and connected to the stiffener plate.

[0015] Optionally, the battery pack further includes an end plate, and the end plate is connected to at least one side of the cell assembly along the second direction. The end plate, the sealing member, and the sealing plate enclose the filling gap. The end plate has a thinning area on the side facing the cell assembly.

[0016] Secondly, embodiments of this application provide an electrical device including the battery pack of any of the above embodiments.

[0017] In the embodiments of this application, a space for accommodating adhesive is formed by spacing the battery cell assembly and the housing along a second direction to create a filling gap. An adhesive injection channel is located within the housing, and the outlet of the injection channel is connected to the filling gap to allow adhesive to be injected into the gap from the injection channel. Furthermore, by ensuring that the outline of the injection port of the injection channel, projected along a first direction onto the projection plane, at least partially overlaps with the projection of the channel wall of the injection channel along the first direction onto the projection plane, the adhesive injected from the injection port first contacts the channel wall of the injection channel before flowing into the filling gap. This allows the channel wall to act as a buffer for the adhesive, thereby reducing the impact of the adhesive on the battery cell assembly, reducing the flow rate of the adhesive, decreasing the possibility of air bubbles due to high flow rate, reducing air bubbles in the cured adhesive, and improving the quality of adhesive injection.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of a battery pack according to an embodiment of this application; Figure 2 An exploded view of a battery pack according to an embodiment of this application; Figure 3 for Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is a cross-sectional view of the glue injection channel according to an embodiment of this application; Figure 5 This is a perspective view of the sealing component according to an embodiment of this application; Figure 6 This is a structural diagram of the box according to an embodiment of this application; Figure 7 This is a schematic diagram of the installation of the battery cell assembly and end plate according to an embodiment of this application.

[0020] Figure label: 10. Housing; 11. Receiving cavity; 12. Housing body; 121. Rib plate; 122. Positioning groove; 13. Sealing plate; 20. Battery cell assembly; 25. Filling gap; 251. Sub-gap; 26. Adhesive curing layer; 30. Glue injection channel; 31. Glue injection port; 32. Glue outlet; 33. Channel wall; 34. Guide cavity; 35. Buffer cavity; 40. Sealing component; 41. First sealing part; 42. Second sealing part; 50. End plate; 51. Thinning area; B. Glue injection trajectory; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation

[0021] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In related technologies, in order to improve the structural strength of the battery pack, adhesives, such as structural adhesives and potting compounds, are filled between the side wall of the battery pack casing and the battery cell assembly. After curing, these adhesives form a fixed structure, which can form a support layer between the battery cell assembly and the side wall of the battery pack casing, thereby improving the mechanical strength of the entire battery pack and also protecting the battery cell assembly.

[0026] During glue application, the glue is discharged from the glue dispensing machine's pipes and enters the gap between the side wall of the enclosure and the battery cell assembly. The glue may directly reach the side wall, bottom wall, or battery cell assembly. On the one hand, this may cause impact to the side wall, bottom wall, or battery cell assembly, with the impact being more pronounced at faster dispensing speeds. On the other hand, if the dispensing speed is too fast, air may not be able to escape in time, potentially leading to air bubbles in the glue and affecting the quality of the glue application.

[0027] Based on this, embodiments of this application provide a battery pack to solve some or all of the above-mentioned technical problems.

[0028] The battery pack and electrical equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0029] like Figures 1 to 4 As shown, a battery pack according to some embodiments of this application has a first direction X and a second direction Y that are perpendicular to each other, including: a housing 10, a cell assembly 20 and an injection channel 30. The housing 10 has a receiving cavity 11, the cell assembly 20 is disposed in the receiving cavity 11 and connected to the housing 10, the cell assembly 20 and the housing 10 are spaced apart along the second direction Y to form a filling gap 25, the injection channel 30 is disposed in the housing 10, the injection channel 30 has an injection port 31 and an outlet port 32, the outlet port 32 communicates with the filling gap 25, the battery pack has a projection plane perpendicular to the first direction X, and the outline of the injection port 31 is projected onto the projection plane along the first direction X and at least partially overlaps with the projection of the channel wall 33 of the injection channel 30 onto the projection plane along the first direction X.

[0030] In this embodiment, a space for accommodating adhesive is formed by spacing the battery cell assembly 20 and the housing 10 along the second direction Y to create a filling gap 25. An adhesive injection channel 30 is located in the housing 10, and the outlet 32 ​​of the adhesive injection channel 30 is connected to the filling gap 25 to allow adhesive to be injected into the filling gap 25 from the adhesive injection channel 30. Furthermore, by setting the outline of the adhesive injection port 31 of the adhesive injection channel 30 to at least partially overlap with the orthogonal projection of the channel wall 33 of the adhesive injection channel 30 along the first direction X on the projection plane, the adhesive injected from the adhesive injection port 31 first contacts the channel wall 33 of the adhesive injection channel 30 before flowing into the filling gap 25. This allows the channel wall 33 to act as a buffer for the adhesive, thereby reducing the impact of the adhesive on the battery cell assembly 20 and reducing the flow rate of the adhesive, thus reducing the possibility of air bubbles due to high flow rate, reducing air bubbles in the cured adhesive, and improving the adhesive injection quality.

[0031] In specific applications, the battery pack can be at least one of lithium-ion battery packs, solid-state battery packs, lead-acid battery packs, and nickel-metal hydride battery packs. Those skilled in the art can flexibly configure it according to the actual situation, and the embodiments of this application do not limit it in this regard.

[0032] Specifically, such as Figure 1 As shown, the battery pack has a first direction X, a second direction Y, and a projection plane perpendicular to the first direction X, wherein the first direction X is the height direction of the battery pack, and the second direction Y is the length direction of the battery pack.

[0033] like Figure 2 As shown, the battery cell assembly 20 is disposed in the receiving cavity 11 of the housing 10. Along the second direction Y, there is a gap between the battery cell assembly 20 and the housing 10, thereby forming a filling gap 25, in which glue can be filled.

[0034] It should be noted that two filling gaps 25 can be formed between the battery cell assembly 20 and the housing 10 along the second direction Y. The two filling gaps 25 are located on both sides of the battery cell assembly 20 along the second direction Y.

[0035] In some embodiments, the adhesive can be injected into the gap 25 using a dispensing machine. Exemplarily, the adhesive can be structural adhesive or potting compound, etc., which are liquid and flowable, facilitating dispensing.

[0036] like Figure 3 and Figure 4 As shown, the glue injection channel 30 is provided with a glue injection port 31 and a glue outlet 32. Glue is injected from the glue injection port 31, flows along the glue injection channel 30, and finally exits from the glue outlet 32. The glue injection port 31 is connected to the filling gap 25, so that the glue can reach into the filling gap 25.

[0037] In some embodiments, the injection channel 30 may be formed by a separate component and then installed onto the housing 10 of the battery pack, wherein the component forming the injection channel 30 is detachably connected to the housing 10.

[0038] In other embodiments, the glue injection channel 30 can be formed directly on the housing 10, for example, by opening the glue injection channel 30 on the housing 10, and the glue injection channel 30 becomes part of the structure of the housing 10.

[0039] The outline of the injection port 31, projected along the first direction X onto the projection plane, at least partially overlaps with the projection of the channel wall 33 of the injection channel 30, also projected along the first direction X onto the projection plane, such that at least a portion of the injection port 31 faces the channel wall 33 of the injection channel 30. During injection, the adhesive flows along the injection channel 30, and at least a portion of the adhesive can impact the channel wall 33 of the injection channel 30, thereby reducing the flow rate of the adhesive.

[0040] It should be noted that before applying the adhesive, dust and other impurities on the battery pack must be removed to ensure the pack is clean and dry. The adhesive outlet of the adhesive applicator is inserted into the adhesive inlet 31 of the adhesive channel 30. This allows the adhesive to be injected from the inlet 31, reaching the filling gap 25 and thus completing the adhesive application. The injected adhesive cures after a period of time, forming... Figure 2 The adhesive curing layer 26 shown is shown.

[0041] Optionally, such as Figure 3 and Figure 4 As shown, the glue injection direction of the glue injection port 31 intersects with the glue discharge direction of the glue outlet 32.

[0042] In this embodiment, by making the glue injection direction of the glue injection port 31 intersect with the glue discharge direction of the glue outlet 32, the flow direction of the glue can be changed, that is, the glue forms a curved trajectory, which makes the glue form a swirling flow, which is conducive to the discharge of air and the reduction of air residue, thereby improving the glue injection quality and curing quality.

[0043] Specifically, such as Figure 4 As shown, the glue injection direction of the glue inlet 31 and the glue outlet direction of the glue outlet 32 ​​can be perpendicular, with an angle of 90 degrees between them, which can change the flow direction of the glue to a greater extent. At the same time, the orthogonal projection of the outline of the glue inlet 31 along the first direction X can also fall completely on the channel wall 33 of the glue injection channel 30, so that the glue injected from the glue inlet 31 can impact the channel wall 33 of the glue injection channel 30, thereby buffering the glue and reducing the flow speed of the glue.

[0044] It should be noted that the injection direction of the glue inlet 31 and the dispensing direction of the glue outlet 32 ​​can also form other angles, such as any value or range between any two of 60°, 70°, 80°, 100°, 110°, 120°, 130°, 140°, and 150°. The angle formed by the injection direction of the glue inlet 31 and the dispensing direction of the glue outlet 32 ​​can be flexibly set according to actual conditions, and this embodiment does not limit it.

[0045] Optionally, such as Figure 4 As shown, the glue injection channel 30 includes a flow guiding cavity 34 and a buffer cavity 35. The glue injection port 31 is located on one side of the flow guiding cavity 34 along the first direction X and communicates with the flow guiding cavity 34. The glue outlet 32 ​​is located on one side of the flow guiding cavity 34 along the second direction Y and communicates with the flow guiding cavity 34. The buffer cavity 35 is located on the side of the flow guiding cavity 34 away from the glue outlet 32 ​​and communicates with the flow guiding cavity 34.

[0046] In this embodiment, the glue injection port 31 is positioned on one side of the flow guiding cavity 34 along the first direction X, and the glue outlet 32 ​​is positioned on one side of the flow guiding cavity 34 along the second direction Y, thereby achieving glue diversion. By positioning the buffer cavity 35 on the side of the flow guiding cavity 34 opposite to the glue outlet 32, a buffer space is formed. When the glue injection speed is high, some glue can enter the buffer cavity 35, thereby reducing the flow of glue towards the glue outlet 32 ​​and lowering the overall flow speed of glue towards the glue outlet 32.

[0047] Specifically, the glue along Figure 4 The glue is injected from the injection port 31 via the injection trajectory B. Then the glue changes direction and is discharged from the outlet 32. Under the action of gravity, the glue flows along the first direction X (vertical direction) and enters the filling gap 25.

[0048] When the glue is injected at a relatively fast speed, the glue enters the guiding cavity 34 from the injection port 31. Part of the glue flows towards the outlet 32, and the other part flows away from the outlet 32, that is, into the buffer cavity 35. This can prevent all the glue from flowing out directly from the outlet 32, and can also prevent the glue from overflowing from the injection port 31 instead of being discharged from the outlet 32 ​​in time.

[0049] Optionally, such as Figure 4 As shown, the channel wall 33 is positioned towards the glue injection port 31, and the distance between the channel wall 33 and the glue injection port 31 gradually increases along the second direction Y from the buffer cavity 35 to the glue outlet 32.

[0050] In this embodiment, by setting the channel wall 33 to face the glue inlet 31, the glue injected from the glue inlet 31 can impact the channel wall 33, thus buffering the glue. By setting the distance between the channel wall 33 and the glue inlet 31 to gradually increase along the second direction Y from the buffer cavity 35 to the glue outlet 32, the injected glue can flow along the channel wall 33 towards the glue inlet 31, facilitating glue flow.

[0051] It should be noted that the distance between the channel wall 33 and the injection port 31 refers to the distance between the channel wall 33 and the side wall where the injection port 31 is located. For example, the side wall where the injection port 31 is located can be formed into a planar structure extending along the second direction Y, and the channel wall 33 can be formed into a planar structure inclined relative to the second direction Y, so that the distance between the channel wall 33 and the side wall where the injection port 31 is located gradually increases.

[0052] Of course, the channel wall 33 can also be an arc-shaped structure, as long as the distance between the channel wall 33 and the side wall where the glue injection port 31 is located gradually increases.

[0053] Optionally, such as Figure 4As shown, the glue outlet 32 ​​extends beyond the filling gap 25 to the side facing the box 10 along the second direction Y.

[0054] In this embodiment, by setting the glue outlet 32 ​​to extend beyond the filling gap 25 along the second direction Y toward the box 10, the orthogonal projection of the glue outlet 32 ​​along the first direction X is located within the filling gap 25, ensuring that the glue discharged from the glue outlet 32 ​​enters the filling gap 25.

[0055] Specifically, the ratio of the length of the glue outlet 32 ​​extending beyond the filling gap 25 to the length of the filling gap 25 along the second direction Y is less than 1 / 10. This ensures that the glue enters the filling gap 25 without excessively occupying the space of the filling gap 25.

[0056] For example, taking a filling gap 25 with a length of 20mm along the second direction Y as an example, the length of the glue outlet 32 ​​extending beyond the filling gap 25 can be any value or a range between any two values, such as 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, and 2mm. The length of the glue outlet 32 ​​extending beyond the filling gap 25 can be flexibly set according to actual conditions, and this embodiment does not limit this.

[0057] Optionally, such as Figure 2 As shown, the battery pack has a third direction Z perpendicular to the first direction X and the second direction Y, and the filling gap 25 extends along the third direction Z; there are multiple glue injection channels 30, and the multiple glue injection channels 30 are arranged at intervals along the third direction Z.

[0058] In this embodiment, the filling gap 25 extends along the third direction Z, making the length of the filling gap 25 along the third direction Z relatively long. By setting multiple glue injection channels 30 arranged at intervals along the third direction Z, glue can be injected into different positions of the filling gap 25, thereby improving the glue injection efficiency. At the same time, it can also ensure that the glue fills the filling gap 25 more evenly.

[0059] It should be noted that the first direction X, the second direction Y, and the third direction Z are mutually perpendicular. Specifically, this can be "perpendicular" in the strict sense, for example, the angle between the first direction X and the second direction Y is 90°; or it can be "approximately perpendicular," specifically meaning that the angle between any two of the first direction X, the second direction Y, and the third direction Z includes a certain error. Considering the measurement and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system), this error is within the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, the angle between the first direction X and the second direction Y is 90° ± 5°.

[0060] In related technologies, the glue injection pipe of the glue injection machine is located directly at the opening of the filling gap 25. Since the filling gap 25 has a large length along the third direction Z, the glue injection pipe needs to move back and forth along the third direction Z to ensure uniform glue filling. However, the movement of the glue injection pipe makes the glue injection operation more complicated, and may also cause glue overflow during the movement of the glue injection pipe. To address this, the battery pack of this application embodiment avoids the above problems by setting multiple glue injection channels 30 arranged at intervals along the third direction Z, eliminating the need for the glue injection pipe to move along the third direction Z.

[0061] Specifically, such as Figure 2 As shown, the filling gap 25 formed between the battery cell assembly 20 and the housing 10 extends along the third direction Z, and the glue injection channel 30 is correspondingly set to multiple.

[0062] For example, the number of dispensing channels 30 can be 2, 3, 4, 5, etc. The number of dispensing channels 30 can be flexibly set according to the actual situation, and this application embodiment does not limit it in this regard.

[0063] Optionally, such as Figure 2 and Figure 5 As shown, the battery pack also includes a sealing component 40, which is disposed between the housing 10 and the cell assembly 20. The sealing component 40 connects the housing 10 and the cell assembly 20, and the housing 10, the sealing component 40 and the cell assembly 20 enclose and form a filling gap 25.

[0064] In this embodiment, by setting a sealing member 40 to connect the housing 10 and the cell assembly 20, the housing 10, the sealing member 40 and the cell assembly 20 enclose and form a filling gap 25, thereby restricting the space of the filling gap 25, forming a controllable glue filling area, preventing the glue from flowing randomly to other areas, and also ensuring the consistency of the battery pack.

[0065] Specifically, such as Figure 5 As shown, the sealing member 40 may include a first sealing portion 41 and a second sealing portion 42. The first sealing portion 41 extends along a third direction Z, and the second sealing portion 42 extends along a first direction X. There are two second sealing portions 42, and both second sealing portions 42 are connected to one side of the first sealing portion 41 along the first direction X, making the shape of the sealing member 40 approximately U-shaped. In this way, the sealing member 40 is sandwiched between the housing 10 and the battery cell assembly 20, and together with the housing 10 and the battery cell assembly 20, they enclose a filling gap 25.

[0066] In some embodiments, the sealing element 40 can be bonded to the housing 10 and the battery cell assembly 20 through an adhesive layer. At the same time, the adhesive layer can also seal the sealing element 40 with the housing 10 and the battery cell assembly 20, preventing the injected glue from leaking out.

[0067] In other embodiments, the sealing element 40 may be made of a material with a certain degree of elasticity, such as foam or rubber. The length of the sealing element 40 along the second direction Y is slightly greater than the length of the filling gap 25 along the second direction Y. In this way, the sealing element 40 is installed between the housing 10 and the battery cell assembly 20 by compression. The sealing element 40 deforms due to compression, so that the sealing element 40 tightly abuts against the housing 10 and the battery cell assembly 20, thereby achieving a seal.

[0068] For example, taking a length of 20mm along the second direction Y for filling gap 25 as an example, the length of the sealing member 40 along the second direction Y can be any value among 22mm, 23mm, 24mm, 25mm, and 26mm, or any range between two values. The length of the sealing member 40 along the second direction Y can be flexibly set according to actual conditions, and this embodiment does not limit it.

[0069] Optionally, such as Figure 2 As shown, the battery pack has a third direction Z perpendicular to the first direction X and the second direction Y. The filling gap 25 extends along the third direction Z. Multiple glue injection channels 30 are provided, and the multiple glue injection channels 30 are arranged at intervals along the third direction Z. Multiple sealing members 40 are provided, and the multiple sealing members 40 are arranged at intervals along the third direction Z. The multiple sealing members 40 separate the filling gap 25 to form multiple sub-gap 251, and each sub-gap 251 corresponds to a glue injection channel 30.

[0070] In this embodiment, by setting multiple sealing components 40 spaced apart along the third direction Z, the filling gap 25 between the housing 10 and the cell assembly 20 can be divided into multiple sub-gap 251. Adjacent sub-gap 251 are not interconnected, and each sub-gap 251 corresponds to a glue injection channel 30. In this way, each sub-gap 251 can be glued through the corresponding glue injection channel 30, realizing independent glue injection and facilitating the control of the glue injection status of each sub-gap 251. At the same time, multiple sub-gap 251 can be glued simultaneously, improving the overall glue injection efficiency.

[0071] In addition, the multiple sealing components 40 are spaced apart along the third direction Z, which can also support the housing 10 and the cell pack 20 from different positions, thereby improving the structural strength of the battery pack.

[0072] Specifically, the number of sealing components 40 can be 2, 3, 4, 5, etc., and can be flexibly set according to the actual situation. This application embodiment does not limit this.

[0073] It should be noted that, since the cell assembly 20 includes multiple cell rows arranged along the third direction Z, a gap is formed between each cell row and the housing 10. Therefore, the number of sealing elements 40 can be consistent with the number of cell rows. In this way, each cell row has a sealing element 40 for support and adhesive injection between it and the housing 10, and the resulting cured adhesive layer 26 can effectively support and protect the cell rows. For example, in Figure 2 In this structure, the cell assembly 20 contains three cell arrays, and there are also three sealing elements 40 between one side of the cell assembly 20 and the housing 10, ensuring that each sealing element 40 corresponds to a cell array. Simultaneously, the glue injection channel 30 also corresponds to a cell array, allowing independent control of the glue injection in the sub-gap 251 between each cell array and the housing 10.

[0074] Optionally, such as Figure 4 and Figure 6 As shown, the housing 10 includes a housing body 12 and a sealing plate 13. The housing body 12 has multiple stiffening plates 121 on the side facing the battery cell assembly 20. One end of the multiple stiffening plates 121 is connected to the housing body 12, and the other end of the multiple stiffening plates 121 extends towards the battery cell assembly 20. The multiple stiffening plates 121 are arranged crosswise and connected to each other. The sealing plate 13 is connected to the stiffening plates 121. The sealing plate 13, the sealing member 40 and the battery cell assembly 20 enclose and form a filling gap 25.

[0075] In this embodiment, multiple stiffening plates 121 are provided on the side of the main body 12 facing the cell assembly 20. These stiffening plates 121 are arranged crosswise and connected to each other, which can disperse the force transmission path and enhance the structural strength of the main body 10, thereby improving the overall structural strength of the battery pack. Simultaneously, a sealing plate 13 is connected to the stiffening plates 121. The sealing plate 13, the sealing member 40, and the cell assembly 20 form a filling gap 25, preventing the injected adhesive from reaching the stiffening plates 121. The sealing plate 13 can also seal the stiffening plates 121.

[0076] Specifically, such as Figure 6 As shown, the stiffening plates 121 intersect each other to form a mesh structure, which improves the structural strength of the box 10.

[0077] Optionally, such as Figure 6 As shown, the stiffener 121 is provided with a positioning groove 122, and the sealing plate 13 is embedded in the positioning groove 122 and connected to the stiffener 121.

[0078] In this embodiment of the application, by providing a positioning groove 122 on the stiffener 121, the sealing plate 13 can be embedded into the positioning groove 122, thereby realizing the positioning of the sealing plate 13 and the stiffener 121, preventing the sealing plate 13 from being misaligned or loose, facilitating the connection between the sealing plate 13 and the stiffener 121, and reducing the difficulty of positioning and installation.

[0079] In some embodiments, such as Figure 6As shown, since the sealing plate 13 is connected to multiple stiffening plates 121 simultaneously, each stiffening plate 121 has a recess, and the recesses on the multiple stiffening plates 121 together form a positioning groove 122. The shape of the positioning groove 122 is the same as the shape of the sealing plate 13, for example, both can be rectangular.

[0080] Optionally, such as Figure 4 and Figure 7 As shown, the battery pack also includes an end plate 50. The end plate 50 is connected to at least one side of the cell assembly 20 along the second direction Y. The end plate 50, the sealing member 40 and the sealing plate 13 enclose and form a filling gap 25. The end plate 50 is provided with a thinning area 51 on the side facing the cell assembly 20.

[0081] In this embodiment, by providing an end plate 50 on at least one side of the cell assembly 20 along the second direction Y, the end plate 50 can protect the cell assembly 20 and prevent battery leakage from the cell assembly 20. By providing the end plate 50, the sealing member 40, and the sealing plate 13 to form a filling gap 25, the adhesive is located between the end plate 50 and the sealing plate 13 and does not contact the cell assembly 20, reducing the impact on the cell assembly 20. Simultaneously, by providing a thinning area 51 on the side of the end plate 50 facing the cell assembly 20, a gap is formed between the end plate 50 and the cell assembly 20 at the position of the thinning area 51. This gap can accommodate the expansion and deformation of the cell assembly 20, preventing the expansion and deformation of the cell assembly 20 from directly acting on the housing 10 and reducing the possibility of deformation of the housing 10.

[0082] Specifically, the ratio of the depth of the thinning region 51 along the second direction Y to the thickness of the end plate 50 along the second direction Y can be any value from 0.3, 0.4, 0.5, 0.6, and 0.7, or any range between two values. This ensures both the structural strength of the end plate 50 and sufficient space in the thinning region 51 to accommodate the expansion and deformation of the cell assembly 20. Of course, the ratio of the depth of the thinning region 51 along the second direction Y to the thickness of the end plate 50 along the second direction Y can be flexibly set according to actual conditions, and this embodiment does not limit this.

[0083] Optionally, an electrical device includes a battery pack from any of the above embodiments.

[0084] In this embodiment, since the electrical device includes the battery pack of any of the above embodiments, it can have the beneficial effects of the battery pack. That is, by setting the outline of the glue injection port 31 of the glue injection channel 30 along the first direction X as orthogonal projection and the channel wall 33 of the glue injection channel 30 along the first direction X as orthogonal projection, the glue injected from the glue injection port 31 first contacts the channel wall 33 of the glue injection channel 30 before flowing into the filling gap 25, so that the channel wall 33 can play a buffering role for the glue, thereby reducing the impact of the glue on the cell assembly 20, reducing the flow speed of the glue, reducing the possibility of bubbles in the glue due to the fast flow speed, reducing the number of bubbles in the cured glue, and improving the glue injection quality.

[0085] In some embodiments, electrical devices may include laptops, pen-based computers, mobile computers, e-book players, portable telephones, portable fax machines, portable copiers, portable printers, stereo headphones, video recorders, LCD TVs, portable cleaners, portable CD players, mini CDs, transceivers, electronic notebooks, calculators, memory cards, portable recorders, radios, backup power supplies, motors, automobiles, motorcycles, electric bicycles, bicycles, ships, spacecraft, lighting fixtures, toys, game consoles, clocks, power tools, flashlights, cameras, large household batteries, and lithium-ion capacitors, etc.

[0086] Specifically, the vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack having a first direction (X) and a second direction (Y) that are perpendicular to each other, characterized in that, include: The housing (10) has a receiving cavity (11); A battery cell assembly (20) is disposed in the receiving cavity (11) and connected to the housing (10). The battery cell assembly (20) and the housing (10) are spaced apart along the second direction (Y) to form a filling gap (25). The glue injection channel (30) is located in the housing (10). The glue injection channel (30) has a glue injection port (31) and a glue outlet (32). The glue outlet (32) is connected to the filling gap (25). The battery pack has a projection plane perpendicular to the first direction (X). The outline of the glue injection port (31) in the projection plane along the first direction (X) at least partially overlaps with the projection of the channel wall (33) of the glue injection channel (30) in the projection plane along the first direction (X).

2. The battery pack according to claim 1, characterized in that, The direction of glue injection at the glue injection port (31) intersects with the direction of glue discharge at the glue outlet (32).

3. The battery pack according to claim 1, characterized in that, The glue injection channel (30) includes a flow guide cavity (34) and a buffer cavity (35). The glue injection port (31) is located on one side of the flow guide cavity (34) along the first direction (X) and communicates with the flow guide cavity (34). The glue outlet (32) is located on one side of the flow guide cavity (34) along the second direction (Y) and communicates with the flow guide cavity (34). The buffer cavity (35) is located on the side of the flow guide cavity (34) away from the glue outlet (32) and communicates with the flow guide cavity (34).

4. The battery pack according to claim 3, characterized in that, The channel wall (33) is positioned toward the glue injection port (31), and the distance between the channel wall (33) and the glue injection port (31) gradually increases along the second direction (Y) from the buffer cavity (35) to the glue outlet (32).

5. The battery pack according to claim 3, characterized in that, The dispensing port (32) extends beyond the filling gap (25) and faces the box (10) in the second direction (Y).

6. The battery pack according to any one of claims 1-5, characterized in that, The battery pack has a third direction (Z) perpendicular to the first direction (X) and the second direction (Y), and the filling gap (25) extends along the third direction (Z); the glue injection channel (30) is provided in multiple ways, and the multiple glue injection channels (30) are arranged at intervals along the third direction (Z).

7. The battery pack according to any one of claims 1-5, characterized in that, The battery pack also includes a sealing element (40), which is disposed between the housing (10) and the cell assembly (20). The sealing element (40) connects the housing (10) and the cell assembly (20). The housing (10), the sealing element (40) and the cell assembly (20) together form the filling gap (25).

8. The battery pack according to claim 7, characterized in that, The battery pack has a third direction (Z) perpendicular to the first direction (X) and the second direction (Y), the filling gap (25) extends along the third direction (Z), and the glue injection channel (30) is provided in multiple ways, with the multiple glue injection channels (30) arranged at intervals along the third direction (Z); The sealing element (40) is provided in multiple ways. The multiple sealing elements (40) are spaced apart along the third direction (Z). The multiple sealing elements (40) separate the filling gap (25) to form multiple sub-gap (251). Each sub-gap (251) is provided with a glue injection channel (30).

9. The battery pack according to claim 7, characterized in that, The housing (10) includes a housing body (12) and a sealing plate (13). The housing body (12) has a plurality of stiffening plates (121) on the side facing the battery cell assembly (20). One end of the plurality of stiffening plates (121) is connected to the housing body (12), and the other end of the plurality of stiffening plates (121) extends toward the battery cell assembly (20). The plurality of stiffening plates (121) are arranged crosswise and connected to each other. The sealing plate (13) is connected to the stiffening plate (121), and the sealing plate (13), the sealing member (40) and the battery cell assembly (20) enclose the filling gap (25).

10. The battery pack according to claim 9, characterized in that, The stiffener (121) is provided with a positioning groove (122), and the sealing plate (13) is embedded in the positioning groove (122) and connected to the stiffener (121).

11. The battery pack according to claim 9, characterized in that, The battery pack also includes an end plate (50), and the cell group (20) is connected to the end plate (50) on at least one side along the second direction (Y). The end plate (50), the sealing member (40) and the sealing plate (13) enclose the filling gap (25). The end plate (50) has a thinning area (51) on the side facing the battery cell assembly (20).

12. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-11.

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