Bracket assembly, battery module and encapsulation method

Abstract

A bracket assembly, a battery module, and a glue injection method are disclosed. The bracket assembly includes a first bracket, a second bracket, and multiple glue-guiding tubes. The first bracket has a through-hole and a second hole along a first direction, with the diameter D1 of the first hole being larger than the diameter D2 of the second hole. The second bracket is disposed opposite to the first bracket. The multiple glue-guiding tubes are disposed between the first and second brackets, each including a relatively independent first tube and a second tube. The inner diameter of the first tube is larger than the inner diameter of the second tube. The lumen of the first tube communicates with the first hole, and the lumen of the second tube communicates with the second hole. A first outlet hole is formed at the end of the first tube away from the first bracket, and a second outlet hole is formed at the end of the second tube away from the first bracket. This bracket assembly can solve the problem of uneven glue injection inside the battery module, which easily leads to air bubbles or voids.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, specifically to a support assembly, a battery module, and a glue injection method. Background Technology

[0002] With the rapid development of energy storage and new energy power supply, injection-molded battery modules are widely used in various energy storage devices and mobile power supply products due to their advantages such as strong structural integrity and excellent protection performance. The core encapsulation process of injection-molded battery modules is as follows: after fixing the battery cell to the bracket assembly, liquid encapsulating adhesive is poured into the gap between the battery cell and the bracket assembly. After the adhesive cures, it forms a solid encapsulating adhesive, which achieves a firm bond between the battery cell and the bracket and provides all-round protection, thereby ensuring the structural stability, insulation and heat dissipation of the battery module.

[0003] However, existing glue-filled battery modules still have many defects in actual production. The most prominent of these is that due to unreasonable glue channel design, lack of glue guiding structure or poor size adaptability, the liquid glue is prone to local flow rate being too fast or too slow during the filling process. This can lead to incomplete filling of some cell gaps, glue dead corners, or air trapped in the glue that cannot be discharged in time, resulting in defects such as bubbles and voids. Summary of the Invention

[0004] The purpose of this invention is to provide a bracket assembly, a battery module, and an adhesive injection method to solve the problem of uneven adhesive injection inside the battery module, which easily leads to air bubbles or voids.

[0005] To achieve the objectives of this invention, the following technical solution is provided: In a first aspect, the present invention provides a bracket assembly for fixing a battery cell. The bracket assembly includes a first bracket, a second bracket, and multiple conductive tubes. The first bracket has a through hole and a second hole along a first direction, the diameter D1 of the first hole being larger than the diameter D2 of the second hole. The second bracket is disposed opposite to the first bracket along the first direction, and the space between the first bracket and the second bracket is used to place the battery cell. The multiple conductive tubes are disposed between the first bracket and the second bracket and extend along the first direction. The multiple conductive tubes include relatively independent first tubes and second tubes. The inner diameter of the first tube is larger than the inner diameter of the second tube. The lumen of the first tube communicates with the first hole, and the lumen of the second tube communicates with the second hole. The end of the first tube away from the first bracket has a first outlet hole, and the end of the second tube away from the first bracket has a second outlet hole.

[0006] In some embodiments, there are multiple first holes, which are arranged in multiple rows and columns at intervals; there are multiple first tubes, which are connected to the multiple first holes in a one-to-one correspondence; there are multiple second holes, which are respectively located on the outermost sides of the two ends of the first holes along the row direction and / or column direction; there are multiple second tubes, which are connected to the multiple second holes in a one-to-one correspondence.

[0007] In some embodiments, the diameter D1 of the first hole is 4mm to 8mm; and the diameter D2 of the second hole is 1mm to 5mm.

[0008] In some embodiments, one end of the guide tube is connected to the side of the first bracket facing the second bracket, and the other end of the guide tube is spaced apart from the second bracket; the bracket assembly also includes multiple guide tubes, one end of which is connected to the second bracket, and the multiple guide tubes include a third tube and a fourth tube, the third tube being sleeved on the outer periphery of the first tube, the fourth tube being sleeved on the outer periphery of the second tube, the third tube having a third outlet hole at the end away from the first bracket, and the fourth tube having a fourth outlet hole at the end away from the first bracket.

[0009] In some embodiments, the inner diameter of the third tube is larger than the inner diameter of the fourth tube; the guide tube includes a first section and a second section, the first section is connected to the first bracket, the second section is connected to the end of the first section opposite to the first bracket, and the outer diameter of the first section is larger than the outer diameter of the second section.

[0010] In some embodiments, the second bracket has a plurality of adhesive guiding grooves on the side facing the first bracket. The plurality of adhesive guiding grooves are arranged in a ring array around the adhesive guiding tube, and the plurality of adhesive guiding grooves are respectively used to guide the encapsulation adhesive to different battery cells.

[0011] In some embodiments, the adhesive guide groove includes a first adhesive guide groove and a second adhesive guide groove, the width L1 of the first adhesive guide groove is greater than the width L2 of the second adhesive guide groove, a plurality of the first adhesive guide grooves are formed in the circumferential direction of the third tube, and a plurality of the second adhesive guide grooves are formed in the circumferential direction of the fourth tube.

[0012] In some embodiments, the second bracket has multiple independent receiving grooves on the side facing the first bracket, the receiving grooves are connected to the adhesive guide grooves, and the depth of the receiving grooves is greater than the depth of the adhesive guide grooves; multiple guide tubes are correspondingly arranged in the multiple receiving grooves, and the first outlet and the second outlet are connected to the corresponding receiving grooves.

[0013] In some embodiments, the plurality of receiving slots include a first receiving slot and a second receiving slot, wherein the orthographic projection of the first tube on the second support is located in the first receiving slot, the orthographic projection of the second tube on the second support is located in the second receiving slot, and the volume of the first receiving slot is greater than the volume of the second receiving slot.

[0014] In some embodiments, the first bracket has a first fixing groove on the side facing the second bracket, and the second bracket has a second fixing groove on the side facing the first bracket. The second fixing groove and the first fixing groove are arranged opposite to each other. Both the first fixing groove and the second fixing groove are used to accommodate the portion of the battery cell. The second fixing groove is connected to the adhesive guide groove.

[0015] In some embodiments, a first limiting part is provided in the first fixing groove, the first limiting part protruding from the side wall of the first fixing groove, and the first limiting part is used to connect the side of the battery cell facing away from the second bracket; a second limiting part is provided in the second fixing groove, and the second limiting part connects the bottom wall and the side wall of the second fixing groove.

[0016] In some embodiments, the support assembly further includes a cover plate connected to the side of the second support facing the first support. The cover plate has a third hole and a fourth hole. The first tube is projected onto the cover plate in the third hole, and the second tube is projected onto the cover plate in the fourth hole. The cover plate closes the adhesive guide groove.

[0017] In some embodiments, the first bracket includes a guide post connected to the side of the first bracket facing the second bracket, the guide post extending along the first direction, and the side of the second bracket facing the first bracket having a guide hole, the guide post at least partially extending into the guide hole.

[0018] In some embodiments, the guide post includes a third segment and a fourth segment, the third segment being connected to the first bracket, the fourth segment being connected to the end of the third segment facing away from the first bracket, the outer diameter of the third segment being larger than the outer diameter of the fourth segment, and the fourth segment extending into the guide hole.

[0019] In some embodiments, the support assembly further includes a housing in which the second support is housed.

[0020] In a second aspect, the present invention provides a battery module including a battery cell and a support assembly as described in the first aspect, wherein the battery cell is fixed in the support assembly.

[0021] Thirdly, the present invention provides a glue injection method for injecting glue into a bracket assembly as described in the first aspect. The glue injection method includes: S100, injecting encapsulating glue into the first hole and the second hole using a first pressure P1, detecting that the total mass of the injected encapsulating glue reaches a first preset value Q1, and stopping the injection of the encapsulating glue using the first pressure P1; S200, continuing to inject the encapsulating glue into the first hole and the second hole using a second pressure P2, detecting that the total mass of the injected encapsulating glue reaches a second preset value Q2, and stopping the injection of the encapsulating glue using the second pressure P2; wherein, P2 <P1,70%≤100%×Q1 / Q2≤85%。

[0022] In some implementations, 0.2MPa≤P1≤0.5MPa, 0.05MPa≤P2≤0.15MPa, and 2≤P1 / P2≤10.

[0023] In some embodiments, S100 includes: detecting that the total time for pouring the encapsulating adhesive reaches a third preset value t, and / or detecting that the pressure drop for pouring the encapsulating adhesive reaches a fourth preset value δP, and stopping the pouring of the encapsulating adhesive at the first pressure P1; wherein, the third preset value t is 60%~70% of the total time required for the total mass of the encapsulating adhesive to reach a second preset value Q2, and 0.05MPa≤δP≤0.08MPa.

[0024] This invention involves creating a first hole and a second hole on a first support, and then placing a first tube and a second tube connecting the first hole and the second hole respectively between the first and second supports. The combination of the holes and the tubes allows for adhesive injection near the second support, guiding the encapsulating adhesive to flow into the gaps between the battery cells. Simultaneously, the differentiated design of the first and second holes results in lower flow resistance and a larger injection volume for the encapsulating adhesive injected through the first hole, enabling rapid filling of the main space. Conversely, the encapsulating adhesive injected through the second hole flows more slowly, establishing an adhesive path and guiding the filling direction, ensuring thorough filling, effectively expelling air, achieving uniform filling, and reducing air bubbles. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is an appearance diagram of a battery module according to one implementation method; Figure 2This is a top view of a battery module according to one implementation method; Figure 3 This is an assembly appearance diagram of the first bracket, the second bracket, and the battery cell in one embodiment; Figure 4 This is an exploded view of the first support, the second support, and the battery cell in one embodiment; Figure 5 This is a cross-sectional view of the first support, the second support, and the battery cell in the row direction according to one embodiment; Figure 6 This is a cross-sectional view of the first support, the second support, and the battery cell in the column direction according to one embodiment; Figure 7 An external view of a first bracket according to one embodiment; Figure 8 An external view of the second bracket in one embodiment; Figure 9 This is a top view of the second support in one implementation method; Figure 10 This is a cross-sectional view of the first support, the second support, and the battery cell in another embodiment; Figure 11 This is a flowchart of one implementation method of the glue injection method; Figure 12 This is a detailed flowchart of one implementation method of the glue injection method.

[0027] Explanation of reference numerals in the attached figures: 1000-battery module; 100 - Bracket assembly, 110 - First bracket, 111 - First plate, 1111 - First hole, 1112 - Second hole, 1113 - First fixing groove, 1114 - First limiting part, 112 - Guide tube, 1121 - First section, 1122 - Second section, 112A - First tube, 112A1 - First outlet, 112B - Second tube, 112B1 - Second outlet, 113 - Guide post, 1131 - Third section, 1132 - Fourth section, 120 - Second bracket, 121 - Second plate, 12 11-Second fixing groove, 1212-Second limiting part, 122-Guide tube, 122A-Third tube, 122A1-Third outlet hole, 122B-Fourth tube, 122B1-Fourth outlet hole, 123-Glue guide groove, 123A-First glue guide groove, 123B-Second glue guide groove, 124-Accommodation groove, 124A-First accommodation groove, 124B-Second accommodation groove, 125-Guide hole, 130-Cover plate, 131-Third hole, 132-Fourth hole, 133-Fifth hole, 134-Sixth hole, 140-Box body; 200-cell / cylindrical cell; 001 - First direction, 002 - Row direction, 003 - Column direction. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0030] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0031] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] This invention provides a battery module 1000, please refer to the following: Figure 1 The battery module 1000 can serve as a core component of energy storage or power supply equipment. The battery module 1000 includes a support assembly 100, a battery cell 200, and encapsulating adhesive (i.e., the cured product of the encapsulating adhesive). The support assembly 100 encloses a receiving space, the battery cell 200 is housed within this space and fixed to the support assembly 100, and a gap may exist between the battery cell 200 and the support assembly 100, which is filled with encapsulating adhesive.

[0033] In a specific embodiment, the battery cell 200 can be a cylindrical battery cell 200 or a prismatic battery cell 200; preferably, the battery cell 200 is a cylindrical battery cell 200. Taking a cylindrical battery cell 200 as an example, the axial direction of the cylindrical battery cell 200 is a first direction 001, and the first direction 001 mentioned below is based on the axial direction of the cylindrical battery cell 200. The cylindrical battery cell 200 includes a first surface and a second surface opposite to each other along the first direction 001, wherein the first surface can be a top surface, and a positive electrode can be disposed on the first surface; the second surface can be a bottom surface, and a negative electrode can be disposed on the second surface.

[0034] In a specific embodiment, the encapsulating adhesive is solid and is obtained by curing encapsulating glue. The encapsulating glue is poured into the accommodating space to fill the gap between the battery cell 200 and the support assembly 100. After the encapsulating glue cures, it forms the encapsulating adhesive. The encapsulating adhesive can serve multiple functions, including fixing the battery cell 200, assisting in heat dissipation, providing cushioning and enhancing insulation, and providing fire and explosion protection.

[0035] For some implementation methods, please refer to Figures 2-4 The support assembly 100 includes a first support 110, a second support 120, and multiple conductive tubes 112. The first support 110 has a through hole 1111 and a second hole 1112 along a first direction 001, with the diameter D1 of the first hole 1111 being larger than the diameter D2 of the second hole 1112. The second support 120 is disposed opposite to the first support 110 along the first direction 001, and a battery cell 200 is disposed between the first support 110 and the second support 120. The multiple conductive tubes 112 are disposed between the first support 110 and the second support 120. The brackets 120 extend along the first direction 001. Multiple guide tubes 112 include relatively independent first tubes 112A and second tubes 112B. The inner diameter of the first tube 112A is larger than the inner diameter of the second tube 112B. The lumen of the first tube 112A is connected to the first hole 1111, and the lumen of the second tube 112B is connected to the second hole 1112. The first tube 112A has a first outlet hole 112A1 at the end away from the first bracket 110, and the second tube 112B has a second outlet hole 112B1 at the end away from the first bracket 110.

[0036] In a specific embodiment, please refer to Figure 3 and Figure 4 The first support 110 may include a first plate 111, and the second support 120 may include a second plate 121. Both the first plate 111 and the second plate 121 can be plate-shaped structures. The first plate 111 and the second plate 121 are arranged in parallel and are spaced apart from each other along a first direction 001. The thickness direction of both the first plate 111 and the second plate 121 is the first direction 001. The first plate 111 can be used to fix the top surface of the battery cell 200, that is, the first plate 111 covers the top of the cylindrical battery cell 200. The second plate 121 can be used to fix the bottom surface of the battery cell 200, thereby holding the battery cell 200 between the first plate 111 and the second plate 121.

[0037] In a specific embodiment, the first plate 111 has a through hole 1111 and a second hole 1112 along the first direction 001. Both the first hole 1111 and the second hole 1112 are injection holes specifically for injecting encapsulating adhesive. Both the first hole 1111 and the second hole 1112 can be circular holes. The first hole 1111 and the second hole 1112 are relatively independent, and the diameter D1 of the first hole 1111 is larger than the diameter D2 of the second hole 1112 (D1 > D2). In this way, the two opposite surfaces of the first plate 111 along the first direction 001 (i.e., the top surface away from the battery cell 200 and the bottom surface facing the battery cell 200) can be connected through the first hole 1111 and the second hole 1112, providing a smooth channel for the injection of encapsulating adhesive and ensuring that the liquid encapsulating adhesive can flow from the top surface of the first plate 111 through the first hole 1111 and the second hole 1112 into the corresponding adhesive guide tube 112.

[0038] In a specific embodiment, please refer to Figure 2 The aperture D1 of the first hole 1111 is larger than the aperture D2 of the second hole 1112. This results in different flow rates of the encapsulating adhesive within the corresponding adhesive guide tubes 112 when the battery module 1000 is simultaneously encapsulated using both holes 1111 and 1112. Because, under the same encapsulation pressure, according to the fluid dynamics formula Q∝orifice diameter^4 (where Q is the volumetric flow rate of the encapsulating adhesive), the volumetric flow rate of the adhesive provided by the first hole 1111 (and the first tube 112A) is much greater than that provided by the second hole 1112 (and the second tube 112B). Therefore, it is equivalent to pre-setting an initial flow field with two different flow rates inside the battery module 1000.

[0039] In a specific embodiment, please refer to Figure 4 The adhesive guide tube 112 has a cylindrical tubular structure, characterized by a hollow interior and openings at both ends. There are at least two adhesive guide tubes 112, corresponding to the first tube 112A and the second tube 112B mentioned earlier. Both tubes 112A and 112B are specific implementations of the adhesive guide tube 112. The first tube 112A corresponds to the first hole 1111, and the second tube 112B corresponds to the second hole 1112. The inner diameter of the first tube 112A is larger than the inner diameter of the second tube 112B to achieve different flow rates of adhesive delivery. Preferably, the inner diameter of the first tube 112A is adapted to the diameter of the first hole 1111, and the inner diameter of the second tube 112B is adapted to the diameter of the second hole 1112.

[0040] In a specific embodiment, please refer to Figure 4The connection between the adhesive guide tube 112 and the bracket assembly 100 can adopt an integrated structural design to improve connection stability and sealing. Specifically, the adhesive guide tube 112 can be integrated with the first bracket 110, meaning that the adhesive guide tube 112 and the first bracket 110 are molded as a single unit through an integrated injection molding process, eliminating the need for subsequent assembly and docking. This allows for a seamless connection between the adhesive guide tube 112 and the side of the first plate 111 facing the second plate 121, effectively preventing gaps at the connection point and thus avoiding adhesive leakage. The other end of the adhesive guide tube 112, away from the first plate 111, can abut against the second plate 121, or a certain distance can be reserved between them.

[0041] In other embodiments, please refer to Figure 10 The guide tube 112 can also be integrated with the second bracket 120. Its structural design logic is consistent with the integrated structure of the guide tube 112 and the first bracket 110 described above. That is, the guide tube 112 and the second bracket 120 are molded as a whole through an integrated injection molding process, allowing the guide tube 112 to seamlessly connect with the side of the second plate 121 facing the first plate 111. This also achieves the effects of improving connection sealing, preventing glue leakage, and enhancing the support strength of the guide tube 112. The other end of the guide tube 112, away from the second plate 121, needs to abut against the first plate 111. This abutment ensures precise alignment between the guide tube 112 and the first hole 1111 or the second hole 1112 on the first plate 111, guaranteeing that the cavity of the guide tube 112 can be fully connected to the corresponding glue injection hole.

[0042] In a specific embodiment, please refer to Figure 5 The first tube 112A has a first outlet 112A1 at its end away from the first support 110, and the second tube 112B has a second outlet 112B1 at its end away from the first support 110. That is, the first tube 112A has the first outlet 112A1 near the second plate 121, and the second tube 112B has the second outlet 112B1 near the second plate 121. This guides the encapsulating adhesive to the second plate 121, ensuring that the encapsulating adhesive can start filling from the area near the second plate 121 and gradually spread upwards to cover the entire gap between the cell 200 and the support assembly 100.

[0043] In a specific embodiment, the first plate 111 is also provided with a through vent hole. The vent hole is used to discharge gas in the space containing the bracket assembly 100 during the potting process. The vent hole provides a smooth channel for air discharge. Its location can avoid the potting hole, the guide tube 112, and the positive and negative terminals of the battery cell 200. It is preferably located in the edge area of ​​the bracket assembly 100 or in a position where gas is prone to stagnation, to ensure that air can be discharged synchronously and smoothly during potting, so that the encapsulating adhesive can fully and tightly fill all gaps and prevent air bubbles from remaining.

[0044] This invention involves creating a first hole 1111 and a second hole 1112 on a first support 110, and setting a first tube 112A and a second tube 112B between the first support 110 and the second support 120, respectively connecting the first hole 1111 and the second hole 1112. The cooperation of the holes and the guide tubes 112 allows for adhesive injection near the second support 120, thereby guiding the encapsulating adhesive to flow into the gaps between the battery cells 200. Simultaneously, the differential design of the hole diameters of the first hole 1111 and the second hole 1112 results in low flow resistance and a large injection volume for the encapsulating adhesive injected through the first hole 1111, enabling rapid filling of the main space. Conversely, the encapsulating adhesive injected through the second hole 1112 flows slowly, establishing an adhesive path and guiding the filling direction, ensuring sufficient filling of the encapsulating adhesive, effectively expelling air, achieving uniform filling, and reducing air bubbles.

[0045] For some implementation methods, please refer to Figure 2 and Figure 4 There are multiple first holes 1111, which are arranged in multiple rows and columns at intervals. There are multiple first tubes 112A, which are connected to the multiple first holes 1111 in a one-to-one correspondence. There are multiple second holes 1112, which are located on the outermost sides of both ends of the first holes 1111 along the row direction 002 and / or column direction 003. There are multiple second tubes 112B, which are connected to the multiple second holes 1112 in a one-to-one correspondence.

[0046] In a specific embodiment, the multiple cells 200 in the battery module 1000 can be arranged in a multi-row, multi-column array. The first hole 1111 can be set between four circularly arranged cells 200; it is understood that the central area of ​​the four circularly arranged cylindrical cells 200 will naturally form a reserved space. The first hole 1111 is opened in this reserved position, which can effectively avoid positional interference between the first hole 1111 and the cell 200, and prevent it from affecting the normal installation, fixing and arrangement of the positive and negative electrodes of the cell 200. At the same time, it can also provide sufficient installation and arrangement space for the corresponding first tube 112A, ensuring that the first tube 112A can extend smoothly along the first direction 001.

[0047] In a specific embodiment, the number of the plurality of first holes 1111 can be associated with the number of battery cells 200 in the battery module 1000. For example, if the number of rows of battery cells 200 in the battery module 1000 is set to n (n is a positive integer greater than or equal to 2), then the number of rows of first holes 1111 is set to n-1; if the number of columns of battery cells 200 in the battery module 1000 is set to m (m is a positive integer greater than or equal to 2), then the number of columns of first holes 1111 is set to m-1. In this way, it can be ensured that there is a row of first holes 1111 between each two adjacent rows of battery cells 200, and there is also a column of first holes 1111 between each two adjacent columns of battery cells 200.

[0048] In a specific embodiment, in the row direction 002, multiple first holes 1111 are arranged at equal intervals, and two second holes 1112 are located at the outermost ends of the multiple first holes 1111, forming an arrangement of second hole 1112-first hole 1111-...-first hole 1111-second hole 1112 along the row direction 002. Of course, the arrangement of the first holes 1111 and second holes 1112 in the column direction 003 can also be the same as in the row direction 002. Thus, the second holes 1112 at both ends can specifically fill the gaps of the outermost cells 200 in the row direction 002, while the multiple first holes 1111 in the middle are responsible for filling the gaps of the cells 200 in the middle of the row direction 002. The two work together to further eliminate blind spots in the glue application.

[0049] In a specific embodiment, the battery module 1000 has 15 cylindrical cells 200, which are arranged in 3 rows and 5 columns at equal intervals. The number of first holes 1111 can be 8, arranged in 2 rows and 4 columns at equal intervals. The number of second holes 1112 can be 4, with 2 second holes 1112 provided on each row direction 002 of the first holes 1111. In other embodiments, the number of cylindrical cells 200 in the battery module 1000 is not specifically limited, and the arrangement of the first holes 1111 and second holes 1112 is adaptively adjusted according to the number of cylindrical cells 200.

[0050] This invention arranges the first hole 1111 in the middle of the first support 110 and the second hole 1112 on both sides of the first hole 1111, so that the encapsulating adhesive can flow into the central area of ​​the battery module 1000 at high speed and large flow rate, and quickly complete the filling of the main space. The second hole 1112 has a small diameter, resulting in a large flow resistance and slow flow of encapsulating adhesive. The encapsulating adhesive flowing into the second hole 1112 can establish an adhesive path and begin to guide the filling direction, while effectively preventing the adhesive from overflowing from the edge of the module too early.

[0051] In some embodiments, the aperture D1 of the first hole 1111 is 4mm to 8mm. Optionally, the aperture D1 of the first hole 1111 can be 4mm, 5mm, 6mm, 7mm, or 8mm. The aperture D2 of the second hole 1112 is 1mm to 5mm. Optionally, the aperture D2 of the second hole 1112 can be 1mm, 2mm, 3mm, 4mm, or 5mm. Of course, when the apertures of the first hole 1111 and the second hole 1112 are selected within the above ranges, the limitation that D1 > D2 must also be satisfied. Preferably, the aperture D1 of the first hole 1111 can be 6mm, and the aperture D2 of the second hole 1112 can be 3mm. The fact that the first hole 1111 and the second hole 1112 meet the above ranges not only ensures the potting efficiency but also ensures the structural stability of the support assembly 100.

[0052] For some implementation methods, please refer to Figures 4-6 One end of the guide tube 112 is connected to the side of the first bracket 110 facing the second bracket 120, and the other end of the guide tube 112 is spaced apart from the second bracket 120; the bracket assembly 100 also includes multiple guide tubes 122, one end of the guide tube 122 is connected to the second bracket 120, the multiple guide tubes 122 include a third tube 122A and a fourth tube 122B, the third tube 122A is sleeved on the outer periphery of the first tube 112A, the fourth tube is sleeved on the outer periphery of the second tube 112B, the third tube 122A has a third outlet hole 122A1 at the end away from the first bracket 110, and the fourth tube 122B has a fourth outlet hole 122B1 at the end away from the first bracket 110.

[0053] In a specific embodiment, the guide tube 112 and the first support 110 are integrally formed, and the guide tube 122 and the second support 120 are integrally formed. The guide tube 122 has a cylindrical tubular structure, characterized by a hollow interior. An opening is provided on the side of the guide tube 122 facing the first plate 111, the size of which matches the outer diameter of the guide tube 112, allowing the guide tube 112 to smoothly extend into the guide tube 122. The number of guide tubes 122 is consistent with the number of guide tubes 112, and there is a one-to-one correspondence between the guide tubes 122 and the guide tubes 112; that is, each guide tube 112 corresponds to one guide tube 122, ensuring that each guide tube 112 can accurately extend into its corresponding guide tube 122.

[0054] In a specific embodiment, after the adhesive guide tube 112 extends into the guide tube 122, the two form a nested mating structure, and the end of the adhesive guide tube 112 away from the first support 110 maintains a preset distance from the second plate 121, and the adhesive guide tube 112 and the second plate 121 are not directly connected. The encapsulating adhesive flowing out through the first outlet 112A1 of the first tube 112A and the second outlet 112B1 of the second tube 112B will first enter the corresponding cavity of the guide tube 122. Furthermore, the third tube 122A (correspondingly sleeved on the outer periphery of the first tube 112A) in the guide tube 122 has a third outlet hole 122A1 at the end away from the first support 110, and the fourth tube 122B (correspondingly sleeved on the outer periphery of the second tube 112B) has a fourth outlet hole 122B1 at the end away from the first support 110. The third outlet hole 122A1 and the fourth outlet hole 122B1 serve as the encapsulation adhesive outlets of the guide tube 122, so that the encapsulation adhesive flows onto the second plate 121.

[0055] In a specific embodiment, the third outlet 122A1 is formed in the circumferential direction of the third tube 122A, and there are multiple third outlets 122A1 arranged at equal intervals in the circumferential direction. The fourth outlet 122B1 is formed in the circumferential direction of the fourth tube 122B, and there are multiple fourth outlets 122B1 arranged at equal intervals in the circumferential direction. This further improves the uniformity of the encapsulating adhesive filling and expands the diffusion range of the adhesive; it also improves the dispensing efficiency, ensuring that the encapsulating adhesive can fully cover the bottom area of ​​the battery cell 200.

[0056] The present invention provides a guide tube 122 on the second bracket 120 to cooperate with the guide tube 112, which can stabilize the structure of the bracket assembly 100. The first bracket 110 and the second bracket 120 work together to fix the battery cell 200, forming a stable "sandwich" encapsulation structure, which can effectively resist vibration and impact, and improve the overall mechanical strength and safety of the module.

[0057] In some embodiments, the inner diameter of the third tube 122A is larger than the inner diameter of the fourth tube 122B. Specifically, in conjunction with the previously mentioned size difference between the first tube 112A and the second tube 112B, the size of the guide tube 122 is also designed to be adapted accordingly, that is, the inner diameter of the third tube 122A is larger than the inner diameter of the fourth tube 122B. Since the third tube 122A is fitted around the outer periphery of the first tube 112A and the fourth tube 122B is fitted around the outer periphery of the second tube 112B, and the inner diameter of the first tube 112A is larger than the inner diameter of the second tube 112B, the difference in the inner diameters of the third tube 122A and the fourth tube 122B can be precisely adapted to the outer diameter of the guide tube 112, ensuring a tight nesting fit.

[0058] For some implementation methods, please refer to Figure 7The guide tube 112 includes a first segment 1121 and a second segment 1122. The first segment 1121 is connected to the first support 110, and the second segment 1122 is connected to the end of the first segment 1121 facing away from the first support 110. The outer diameter of the first segment 1121 is larger than the outer diameter of the second segment 1122. Specifically, both the first tube 112A and the second tube 112B are stepped segmented designs (larger at the top and smaller at the bottom). That is, the outer diameter of the first segment 1121 of the first tube 112A is larger than the outer diameter of the second segment 1122 to which it is connected, and the inner diameter of the first segment 1121 of the first tube 112A is the same as the inner diameter of the second segment 1122 to which it is connected; the outer diameter of the first segment 1121 of the second tube 112B is larger than the outer diameter of the second segment 1122 to which it is connected, and the inner diameter of the first segment 1121 of the second tube 112B is the same as the inner diameter of the second segment 1122 to which it is connected.

[0059] In a specific embodiment, the design with a consistent inner diameter and a stepped decreasing outer diameter can both ensure the structural strength of the connection between the guide tube 112 and the first bracket 110 (the large outer diameter of the first segment 1121 improves connection stability) and ensure the smooth flow of encapsulating adhesive in the cavity of the guide tube 112 (consistent inner diameter without obstruction). At the same time, the smaller outer diameter of the second segment 1122 can smoothly extend into the guide tube 122, perfectly adapting to the nesting and fitting requirements of the guide tube 112 and the guide tube 122, further improving the ease of assembly and the smoothness of adhesive injection. This closely echoes the segmented design of the guide tube 112 and the nesting and fitting of the guide tube 122 mentioned above.

[0060] This invention, by setting the adhesive guide tube 112 as a stepped segmented structure, can improve the structural strength of the connection between the adhesive guide tube 112 and the first support 110, ensure the stability of the connection, and reduce stress concentration at the root of the adhesive guide tube 112 during the glue injection process. On the other hand, the smaller outer diameter of the second segment 1122 can extend more smoothly into the guide tube 122, reducing the difficulty of nested assembly. At the same time, it can also form a reasonable gap between the adhesive guide tube 112 and the guide tube 122, reserving space for the flow of encapsulating adhesive, ensuring that the adhesive can flow smoothly from the outlet of the adhesive guide tube 112 and enter the cavity of the guide tube 122, thus taking into account both structural stability and the convenience of assembly and glue injection.

[0061] For some implementation methods, please refer to Figure 8 and Figure 9The second support 120 has multiple adhesive guiding grooves 123 on the side facing the first support 110. These grooves are arranged in a ring array around the adhesive guiding tube 112, and each groove guides the encapsulating adhesive to a different battery cell 200. Specifically, each area corresponding to the adhesive guiding tube 112 is equipped with a set of ring-array adhesive guiding grooves 123. These grooves extend in different directions to precisely guide the encapsulating adhesive flowing from the adhesive guiding tube 112 (and the guide tube 122) to different surrounding battery cells 200, preventing disordered adhesive diffusion and uneven local filling.

[0062] In a specific embodiment, the number of adhesive guide grooves 123 arranged circumferentially on the adhesive guide tube 112 is consistent with the number of adjacent cells 200 in the same circumferential direction, ensuring that each adjacent cell 200 has a dedicated adhesive guide groove 123 to guide the adhesive, achieving precise distribution and guidance of the adhesive. For example, combined with the setting that the first hole 1111 is opened between four annularly arranged cells 200, the number of adhesive guide grooves 123 is four. The four adhesive guide grooves 123 correspond one-to-one with the four cylindrical cells 200, and the four adhesive guide grooves 123 respectively guide the encapsulation adhesive to the corresponding cylindrical cell 200.

[0063] By creating a guide groove 123 on the second bracket 120, this invention can avoid disordered diffusion of adhesive leading to uneven local filling, and ensure that the adhesive can be accurately guided to the gaps between each cell 200. This achieves precise guidance of the encapsulation adhesive to the gap between the corresponding cell 200 and the bracket assembly 100, further eliminating blind spots in adhesive injection and improving the uniformity and accuracy of encapsulation adhesive filling.

[0064] For some implementation methods, please refer to Figure 8 and Figure 9 The adhesive guiding groove 123 includes a first adhesive guiding groove 123A and a second adhesive guiding groove 123B. The groove width L1 of the first adhesive guiding groove 123A is greater than the groove width L2 of the second adhesive guiding groove 123B. Multiple first adhesive guiding grooves 123A are formed circumferentially on the third tube 122A, and multiple second adhesive guiding grooves 123B are formed circumferentially on the fourth tube 122B. Specifically, the first tube 112A has a larger inner diameter and a stronger adhesive flow rate, correspondingly providing a wider first adhesive guiding groove 123A to accommodate a larger flow rate of encapsulating adhesive, ensuring rapid and smooth adhesive flow and avoiding adhesive stagnation and blockage due to excessively narrow groove width. The second tube 112B has a smaller inner diameter and a relatively gentler adhesive flow rate, correspondingly providing a narrower second adhesive guiding groove 123B to guide precise adhesive flow and prevent excessively rapid adhesive diffusion leading to uneven local filling, thus achieving flow rate matching between the adhesive guiding groove and the guide tube 122 and adhesive guiding tube 112.

[0065] By setting up a first adhesive guide groove 123A and a second adhesive guide groove 123B with different groove widths, the adhesive can be guided to flow precisely, and the uneven filling caused by excessively rapid diffusion of adhesive can be avoided. This achieves flow matching between the adhesive guide groove and the guide tube 122 and the adhesive guide tube 112, further improving the uniformity and accuracy of adhesive injection.

[0066] For some implementation methods, please refer to Figure 5 and Figure 6 The second bracket 120 has multiple independent receiving grooves 124 on the side facing the first bracket 110. The receiving grooves 124 are connected to the adhesive guide grooves, and the depth of the receiving grooves 124 is greater than the depth of the adhesive guide grooves. Multiple guide tubes 122 are arranged in the multiple receiving grooves 124 in a one-to-one correspondence. The first outlet hole 112A1 and the second outlet hole 112B1 are connected to the corresponding receiving grooves 124.

[0067] In a specific embodiment, the receiving groove 124 is a concave cylindrical groove on the second plate 121. Multiple receiving grooves 124 are formed on the second plate 121, and these grooves are independent of each other. This prevents the encapsulating adhesive in different receiving grooves 124 from flowing between them, ensuring that the adhesive flow path corresponding to each guide tube 122 is independent and controllable, further guaranteeing the accuracy of adhesive injection. The number of receiving grooves 124 is the same as the number of guide tubes 122, and each receiving groove 124 contains one guide tube 122. The inner diameter of the receiving groove 124 is larger than the outer diameter of the guide tube 122.

[0068] In a specific embodiment, the adhesive guiding groove is arranged on the outer periphery of the receiving groove 124, and each adhesive guiding groove is connected to the corresponding receiving groove 124 to form a complete adhesive guiding channel, ensuring that the encapsulating adhesive in the receiving groove 124 can flow smoothly into the adhesive guiding groove. It can be understood that the depth of the receiving groove 124 is greater than the depth of the adhesive guiding groove, forming a stepped structure, so that the encapsulating adhesive flowing out of the outlet of the guide tube 122 will first fill the receiving groove 124 first. After the adhesive in the receiving groove 124 reaches a certain level, it will naturally overflow from the connection between the receiving groove 124 and the adhesive guiding groove, and then, guided by the adhesive guiding groove, flow precisely into the vicinity of the corresponding cylindrical cell 200.

[0069] In other embodiments, the second bracket 120 may not have a receiving groove 124. The guide tube 122 is directly connected to the surface of the second plate 121 facing the first plate 111, and the adhesive is guided through the adhesive guide groove. This embodiment simplifies the structural design and processing flow, while also taking into account the adhesive injection effect. It is consistent with the guiding function setting of the adhesive guide groove mentioned above, and provides more flexible options for the structural design of the bracket assembly 100.

[0070] By setting up the receiving groove 124 and the guide tube 122 located inside the receiving groove 124, it is possible to avoid uneven filling caused by the direct and rapid diffusion of glue, and the receiving groove 124 can also temporarily buffer the glue, ensuring that each glue guide groove can receive a sufficient and uniform supply of glue, thereby further improving the stability and accuracy of glue injection.

[0071] For some implementation methods, please refer to Figure 5 , Figure 6 and Figure 8 The plurality of receiving slots 124 include a first receiving slot 124A and a second receiving slot 124B. The orthographic projection of the first tube 112A on the second bracket 120 is located in the first receiving slot 124A, and the orthographic projection of the second tube 112B on the second bracket 120 is located in the second receiving slot 124B. The volume of the first receiving slot 124A is larger than the volume of the second receiving slot 124B. This achieves precise matching of the dimensions of the receiving slots and the tubes, ensuring the rationality of glue buffering and diversion.

[0072] In a specific embodiment, the number of first receiving grooves 124A and second receiving grooves 124B are matched with the number of corresponding pipe fittings. The number of first receiving grooves 124A is the same as the number of first pipes 112A (and the third pipe 122A sleeved on their outer periphery), and the number of second receiving grooves 124B is the same as the number of second pipes 112B (and the fourth pipe 122B sleeved on their outer periphery), forming a one-to-one correspondence. This matching design ensures that each thicker first pipe 112A (and its corresponding third pipe 122A) can be fitted with a larger first receiving groove 124A, and each thinner second pipe 112B (and its corresponding fourth pipe 122B) can be fitted with a smaller second receiving groove 124B.

[0073] In a specific embodiment, the depths of the first receiving groove 124A and the second receiving groove 124B are set to be the same, and the difference in their volumes is achieved by distinguishing their inner diameters; that is, the inner diameter D3 of the first receiving groove 124A is greater than the inner diameter D4 of the second receiving groove 124B. This design simplifies the injection molding process of the second plate 121, eliminating the need to design grooves of different depths, reducing processing difficulty and cost, and also accurately achieves the volume difference through the difference in inner diameters.

[0074] For some implementation methods, please refer to Figures 6-8 The first bracket 110 has a first fixing groove 1113 on the side facing the second bracket 120, and the second bracket 120 has a second fixing groove 1211 on the side facing the first bracket 110. The second fixing groove 1211 and the first fixing groove 1113 are arranged opposite to each other. Both the first fixing groove 1113 and the second fixing groove 1211 are used to accommodate the battery cell 200. The second fixing groove 1211 is connected to the adhesive guide groove.

[0075] In a specific embodiment, a circular first fixing groove 1113 is formed on the side of the first plate 111 facing the second plate 121, and a circular second fixing groove 1211 is formed on the side of the second plate 121 facing the first plate 111. The second fixing groove 1211 and the first fixing groove 1113 are arranged opposite to each other along the first direction 001. During assembly, the top of the cylindrical battery cell 200 extends into the first fixing groove 1113, and the bottom of the cylindrical battery cell 200 extends into the second fixing groove 1211. Through the limiting effect of the grooves, the battery cell 200 is clamped and fixed from both ends of the axial direction. In this way, the displacement and movement of the battery cell 200 in the lateral and longitudinal directions are effectively limited, further improving the installation stability of the battery cell 200 in the bracket assembly 100.

[0076] In a specific embodiment, the second fixing groove 1211 is connected to the adhesive guiding groove, and the depth of the second fixing groove 1211 is greater than the depth of the adhesive guiding groove. This depth difference matches the depth difference between the receiving groove and the adhesive guiding groove, forming a continuous stepped structure, which facilitates the smooth flow and filling of the encapsulating adhesive. It can be understood that the adhesive guiding groove, as an intermediate channel connecting the receiving groove and the second fixing groove 1211, has a clear corresponding rule in its connection relationship: one adhesive guiding groove connects only one second fixing groove 1211 and one receiving groove, ensuring that each adhesive flow path is independent and controllable, avoiding cross-flow of adhesive in different receiving grooves and different second fixing grooves 1211, and ensuring the accuracy of adhesive injection; however, multiple adhesive guiding grooves can be connected to one second fixing groove 1211, adapting to the distribution of the adhesive guiding tubes 112 around the second fixing groove 1211, ensuring that the adhesive flowing out from different receiving grooves can accurately flow into the corresponding second fixing groove 1211, fully filling the gap between the bottom of the battery cell 200 and the second fixing groove 1211.

[0077] In a specific embodiment, a second fixing groove 1211 may be connected to four first adhesive guiding grooves 123A in its circumferential direction, adapting to a scenario where the surrounding area is full of first adhesive guiding tubes 112 (third tubes 122A); or, a second fixing groove 1211 may be connected to two first adhesive guiding grooves 123A in its circumferential direction, adapting to a scenario where two first adhesive guiding tubes 112 are symmetrically arranged in the surrounding area; or, a second fixing groove 1211 may be connected to one first adhesive guiding groove 123A and one second adhesive guiding groove 123B in its circumferential direction, adapting to a scenario where the surrounding area has both first adhesive guiding tubes 112 and second adhesive guiding tubes 112.

[0078] For some implementation methods, please refer to Figure 7 and Figure 8A first limiting part 1114 is provided in the first fixing groove 1113. The first limiting part 1114 protrudes from the side wall of the first fixing groove 1113 and is used to connect the side of the battery cell 200 facing away from the second bracket 120. A second limiting part 1212 is provided in the second fixing groove 1211 and is connected to the bottom wall and side wall of the second fixing groove 1211.

[0079] In a specific embodiment, the first limiting part 1114 includes multiple flanges that protrude from the inner wall of the first fixing groove 1113, and the multiple flanges can be arranged in a ring with equal intervals. The first limiting part 1114 abuts against the top surface of the cylindrical battery cell 200. The first limiting part 1114 can form an assembly limit, effectively restricting the over-assembly of the first bracket 110 and the battery cell 200; on the other hand, the design of the multiple flanges arranged in a ring with equal intervals creates a reserved space in the central area of ​​the first fixing groove 1113, allowing the positive electrode of the top surface of the battery cell 200 to be exposed in this space, avoiding the positive electrode being blocked, thereby facilitating the subsequent wiring operation of the battery cell 200.

[0080] In a specific embodiment, the second limiting part 1212 includes multiple protrusions. These protrusions are located at the connection between the bottom wall and the inner side wall of the second fixing groove 1211, specifically at the corner of the second fixing groove 1211. This location allows for precise contact with the outer corner of the bottom of the cylindrical battery cell 200, avoiding encroachment on the core receiving space of the second fixing groove 1211 while achieving efficient limiting. The multiple protrusions can be arranged in a ring with equal spacing, adapting to the circular structure of the second fixing groove 1211 and the bottom shape of the cylindrical battery cell 200. The protrusions can restrict the circumferential rotation of the cylindrical battery cell 200, further improving the stability and reliability of the battery cell 200 installation.

[0081] For some implementation methods, please refer to Figure 3 The bracket assembly 100 also includes a cover plate 130, which connects to the side of the second bracket 120 facing the first bracket 110. The cover plate 130 has a third hole 131 and a fourth hole 132. The first tube 112A is projected onto the cover plate 130 in the third hole 131, and the second tube 112B is projected onto the cover plate 130 in the fourth hole 132. The cover plate 130 closes the adhesive guide groove. Specifically, the cover plate 130 is used to close the adhesive guide groove, the receiving groove, and the second fixing groove 1211, etc., as mentioned above. The third hole 131 and the fourth hole 132 are both used for the guide tube 122 to pass through.

[0082] In a specific embodiment, the third hole 131 is used for the third tube 122A to pass through, and the diameter of the third hole 131 is adapted to the outer diameter of the third tube 122A. The fourth hole 132 is used for the fourth tube 122B to pass through, and the diameter of the fourth hole 132 is adapted to the outer diameter of the fourth tube 122B. A fifth hole 133 is also provided on the cover plate 130, which is used for the cylindrical battery cell 200 to pass through, and the diameter of the fifth hole 133 is adapted to the outer diameter of the cylindrical battery cell 200.

[0083] In a specific embodiment, the diameter of the third hole 131 should be smaller than the inner diameter of the first receiving groove 124A, the diameter of the fourth hole 132 should be smaller than the inner diameter of the second receiving groove 124B, and the diameter of the fifth hole 133 should be smaller than the inner diameter of the first fixing groove 1113; this can seal the receiving groove and the second fixing groove 1211. Furthermore, the adhesive guiding groove is a recessed groove in the second plate 121, so the cover plate 130 can also seal the adhesive guiding groove. The cover plate 130 can prevent the encapsulating adhesive from overflowing from the opening of the groove during flow, and at the same time prevent external dust and impurities from entering the adhesive guiding groove and blocking the adhesive flow channel, further ensuring the adhesive injection effect and the sealing performance of the battery module 1000.

[0084] For some implementation methods, please refer to Figure 4 , Figure 7 and Figure 8 The first support 110 includes a guide post 113, which connects to the side of the first support 110 facing the second support 120. The guide post 113 extends along a first direction 001. The side of the second support 120 facing the first support 110 has a guide hole 125, and the guide post 113 extends at least partially into the guide hole 125. Specifically, there can be multiple guide posts 113. The guide posts 113 connect to the side of the first plate 111 facing the second plate 121. The guide posts 113 and the guide holes 125 cooperate to achieve rapid and accurate positioning of the first support 110 and the second support 120.

[0085] In a specific embodiment, the guide post 113 can be cylindrical, and the guide hole 125 is a circular hole. A corresponding sixth hole 134 can be provided on the cover plate 130. After the cover plate 130 and the second bracket 120 are assembled, the sixth hole 134 and the guide hole 125 are aligned. During the assembly process of the first bracket 110 and the second bracket 120, the guide post 113 passes through the sixth hole 134 and extends into the guide hole 125.

[0086] In a specific embodiment, the guide hole 125 can be opened on the outermost side of the column direction 003 of the cylindrical cell 200, and there are 6 guide holes 125 on each side of the column direction 003, that is, a total of 12 guide holes 125 are opened on the second plate 121. The 6 guide holes 125 on the same side are arranged at equal intervals, and the first plate 111 is provided with 12 corresponding guide posts 113.

[0087] The present invention achieves rapid and non-skewed alignment of the upper and lower supports by setting guide posts 113 on the first support 110 and opening guide holes 125 on the second support 120, with the guide posts 113 and guide holes 125 precisely matched. This ensures the alignment accuracy of key components such as the battery cell 200, the conductive tube 112 and the guide tube 122, and greatly improves the production assembly efficiency and the consistency of the battery module 1000.

[0088] For some implementation methods, please refer to Figure 7 The guide post 113 includes a third segment 1131 and a fourth segment 1132. The third segment 1131 is connected to the first bracket 110, and the fourth segment 1132 is connected to the end of the third segment 1131 facing away from the first bracket 110. The outer diameter of the third segment 1131 is larger than the outer diameter of the fourth segment 1132, and the fourth segment 1132 extends into the guide hole 125. Specifically, the guide post 113 adopts a segmented stepped design to improve positioning stability and assembly convenience. During assembly, the smaller outer diameter fourth segment 1132 is specifically designed to extend into the guide hole 125, while the larger outer diameter third segment 1131 remains outside the guide hole 125. On the one hand, this can limit the insertion depth of the guide post 113, preventing the guide post 113 from extending too far into the guide hole 125 and squeezing the second bracket 120 or the cover plate 130, thus ensuring assembly accuracy. On the other hand, it can also enhance the structural strength of the root of the guide post 113, reducing the risk of bending or breaking of the guide post 113 during assembly or use. This closely echoes the core setting of the guide post 113 assisting in positioning and improving the stability of the bracket assembly 100, taking into account both assembly convenience and structural reliability.

[0089] For some implementation methods, please refer to Figure 2 The bracket assembly 100 also includes a housing 140, in which the second bracket 120 is housed. Specifically, the housing 140 adopts a cuboid structure with one open side. After assembly, both the second bracket 120 and the cylindrical battery cell 200 are housed within the housing 140, with the second bracket 120 fixedly connected to the bottom wall of the housing 140. Furthermore, the first plate 111 can also serve as a cover for the housing 140. After the first bracket 110 and the second bracket 120 are assembled and the battery cell 200 is fixed in place, the first plate 111 is placed over the opening of the housing 140, thus sealing the opening and creating a sealed space inside the battery module 1000. This prevents leakage of the encapsulation adhesive and isolates external dust, moisture, and other impurities from entering. It also further enhances the overall structural strength of the bracket assembly 100, closely echoing the support and protection functions of the bracket assembly 100 described above, balancing structural rationality and practical protection.

[0090] This invention also provides a glue injection method, please refer to [reference needed]. Figure 11, The glue injection method is used to inject glue into the battery module using the bracket assembly provided in the above embodiment. The glue injection method includes the following steps: S000, Install the cylindrical battery cell array on the second bracket, align and close the cover of the first bracket and the first bracket through the guiding column to form a battery module to be filled with glue; S100, Inject encapsulation glue into the first hole and the second hole with the first pressure P1, detect that the total mass of the injected encapsulation glue reaches the first preset value Q1, and stop injecting encapsulation glue with the first pressure P1; S200, Continue to inject encapsulation glue into the first hole and the second hole with the second pressure P2, detect that the total mass of the injected encapsulation glue reaches the second preset value Q2, and stop injecting encapsulation glue with the second pressure P2.

[0091] S300, Let the battery module after glue injection stand still to make the encapsulation glue solidify to form an encapsulation glue, and obtain the battery module.

[0092] Wherein, P2 < P1, 70% ≤ 100% × Q1 / Q2 ≤ 85%; and the pressure ratio of the first pressure P1 and the second pressure P2 is in a positive correlation. Optionally, Q1 / Q2 can be 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 83%, 84%, 85%.

[0093] It should be noted that the second preset value Q2 is the total mass G0 of the encapsulation glue to be injected into the battery module, that is, the second preset value Q2 is 100% of the encapsulation glue mass. The first preset value Q1 is 70% - 85% of the total mass of the encapsulation glue to be injected.

[0094] In a specific embodiment, please refer to Figure 12 , Step S000 is on the one hand for assembling the battery module, and on the other hand it is also for preparing for the glue injection assembly of the module and presetting the process parameters. The preset parameters include the first preset value Q1 and the second preset value Q2 in the subsequent steps.

[0095] In a specific embodiment, when injecting encapsulation glue into the first hole and the second hole with the first pressure P1, since the aperture of the first hole is larger, the flow resistance of the first hole is smaller, so that the encapsulation glue can rush into the central area of the battery module at high speed and large flow rate, and quickly complete the filling of the main space; while the second hole has a smaller aperture, resulting in a large flow resistance, and the encapsulation glue flows in slowly. The encapsulation glue flowing into the second hole can establish a glue path and start to guide the filling direction, and at the same time effectively prevent the glue from overflowing from the edge of the module prematurely.

[0096] In a specific embodiment, the encapsulating adhesive is continued to be injected into the first and second holes using a second pressure P2. This is because when the filling of the middle area is nearly complete (i.e., reaching the first preset value Q1), the flow rate of the first hole decreases significantly, while the relative flow rate of the second hole increases. Reducing the injection pressure to the second pressure P2 drives the adhesive to smoothly and uniformly advance from the filled central area to the incompletely filled areas at both ends, and gently drives the residual gas inside the battery module towards the vent, thereby completely eliminating the defects of air bubbles at the far end and incomplete filling.

[0097] In a specific embodiment, please refer to Figure 12 The termination condition for dispensing is determined when the total mass of the encapsulating adhesive reaches the second preset value Q2. If the total mass of the encapsulating adhesive does not reach the second preset value Q2, then step S200 continues. Simultaneously, after the termination condition is determined to be "yes," uniform overflow of adhesive occurs at the end of the dispensing holes (first hole and second hole), lasting for T seconds. After the overflow stabilizes, step S300 continues for curing.

[0098] The glue injection method provided by this invention, through the structural setting of the first and second holes on the battery module and the combination of a two-stage pressure glue injection process, combines static structural differences with dynamic process parameters to achieve precise control of the flow sequence and flow rate of the glue in three-dimensional space. In the first stage of glue injection (first pressure P1), the advantage of the first hole can be used to quickly complete more than 80% of the filling, shortening the overall glue injection time. In the second stage of glue injection (second pressure P2), the flow restriction characteristics of the second hole can be used to achieve fine filling and good venting effect. At the same time, satisfying the proportional relationship between P1 and P2, it can be standardized and calibrated according to the battery module size, glue viscosity, and pore size differences, which is easy to implement on automated production lines and ensures high reliability and low defect rate in large-scale production.

[0099] In some implementations, 0.2MPa≤P1≤0.5MPa, 0.05MPa≤P2≤0.15MPa, and 2≤P1 / P2≤10. Optionally, the first pressure P1 can be 0.2MPa, 0.3MPa, 0.4MPa, or 0.5MPa; the second pressure P2 can be 0.05MPa, 0.07MPa, 0.09MPa, 0.11MPa, 0.13MPa, or 0.15MPa; and P1 / P2 can be 2, 3, 4, 5, 6, 7, 8, 9, or 10.

[0100] For some implementation methods, please refer to Figure 12The total mass of the encapsulating adhesive being poured can be the primary criterion for determining the end of the first encapsulation. To ensure the reliability of the first encapsulation, step S100 may further include: detecting when the total time for pouring the encapsulating adhesive reaches a third preset value t. The third preset value t is 60% to 70% of the total time required for the total mass of the encapsulating adhesive to reach the second preset value Q2. The time required for the total mass G0 of the encapsulating adhesive poured in both sessions can be t0. Then, the third preset value t satisfies: 60% ≤ 100% × t / t0 ≤ 70%. Optionally, the third preset value t can be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, or 70%.

[0101] In some embodiments, step S100 may further include: detecting that the pressure drop of the encapsulating adhesive reaches a fourth preset value δP, and stopping the encapsulating adhesive injection at the first pressure P1. It should be noted that detecting the total duration and pressure drop of the encapsulating adhesive injection are secondary determination conditions. That is, when the total mass of the first injection fluctuates or deviates, the secondary determination conditions can be activated simultaneously to determine whether the first injection has ended. 0.05MPa≤δP≤0.08MPa; optionally, the fourth preset value δP can be 0.05MPa, 0.06MPa, 0.07MPa, or 0.08MPa.

[0102] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 the present invention.

[0103] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A bracket assembly (100) for fixing a battery cell (200), characterized in that, include: The first bracket (110) has a through hole (1111) and a second hole (1112) along the first direction (001), and the diameter D1 of the first hole (1111) is larger than the diameter D2 of the second hole (1112). The second bracket (120) is disposed opposite to the first bracket (110) along the first direction (001), and the battery cell (200) is disposed between the first bracket (110) and the second bracket (120); Multiple guide tubes (112) are disposed between the first support (110) and the second support (120) and extend along the first direction (001). The multiple guide tubes (112) include a relatively independent first tube (112A) and a second tube (112B). The inner diameter of the first tube (112A) is larger than the inner diameter of the second tube (112B). The lumen of the first tube (112A) is connected to the first hole (1111), and the lumen of the second tube (112B) is connected to the second hole (1112). A first outlet hole (112A1) is opened at the end of the first tube (112A) away from the first support (110), and a second outlet hole (112B1) is opened at the end of the second tube (112B) away from the first support (110).

2. The support assembly (100) according to claim 1, characterized in that, There are multiple first holes (1111), and the multiple first holes (1111) are arranged in multiple rows and columns at intervals. There are multiple first tubes (112A), and the multiple first tubes (112A) are connected to the multiple first holes (1111) one by one. There are multiple second holes (1112), which are respectively located on the outermost sides of both ends of the first hole (1111) along the row direction (002) and / or column direction (003). There are multiple second tubes (112B), which are connected to the multiple second holes (1112) in a one-to-one correspondence.

3. The support assembly (100) according to claim 1, characterized in that, The diameter D1 of the first hole (1111) is 4mm~8mm; the diameter D2 of the second hole (1112) is 1mm~5mm.

4. The support assembly (100) according to claim 1, characterized in that, One end of the guide tube (112) is connected to the side of the first bracket (110) facing the second bracket (120), and the other end of the guide tube (112) is spaced apart from the second bracket (120); The support assembly (100) further includes multiple guide tubes (122), one end of which is connected to the second support (120). The multiple guide tubes (122) include a third tube (122A) and a fourth tube (122B). The third tube (122A) is sleeved on the outer periphery of the first tube (112A), and the fourth tube (122B) is sleeved on the outer periphery of the second tube (112B). The third tube (122A) has a third outlet hole (122A1) at the end away from the first support (110), and the fourth tube (122B) has a fourth outlet hole (122B1) at the end away from the first support (110).

5. The support assembly (100) according to claim 4, characterized in that, The inner diameter of the third tube (122A) is larger than the inner diameter of the fourth tube (122B); the guide tube (112) includes a first section (1121) and a second section (1122), the first section (1121) is connected to the first bracket (110), the second section (1122) is connected to the end of the first section (1121) facing away from the first bracket (110), and the outer diameter of the first section (1121) is larger than the outer diameter of the second section (1122).

6. The support assembly (100) according to claim 4, characterized in that, The second bracket (120) has a plurality of adhesive guide grooves (123) on the side facing the first bracket (110). The plurality of adhesive guide grooves (123) are arranged in a ring array in the circumferential direction of the adhesive guide tube (112), and the plurality of adhesive guide grooves (123) are respectively used to guide the encapsulation adhesive to different battery cells (200).

7. The support assembly (100) according to claim 6, characterized in that, The adhesive guide groove (123) includes a first adhesive guide groove (123A) and a second adhesive guide groove (123B). The groove width L1 of the first adhesive guide groove (123A) is greater than the groove width L2 of the second adhesive guide groove (123B). The third tube (122A) has a plurality of first adhesive guide grooves (123A) in its circumferential direction, and the fourth tube (122B) has a plurality of second adhesive guide grooves (123B) in its circumferential direction.

8. The support assembly (100) according to claim 6, characterized in that, The second bracket (120) has multiple independent receiving grooves (124) on the side facing the first bracket (110). The receiving grooves (124) are connected to the adhesive guide grooves (123), and the depth of the receiving grooves (124) is greater than the depth of the adhesive guide grooves (123). Multiple guide tubes (122) are arranged in the multiple receiving grooves one by one. The first outlet (112A1) and the second outlet (112B1) are connected to the corresponding receiving grooves (124).

9. The support assembly (100) according to claim 8, characterized in that, The plurality of receiving slots (124) include a first receiving slot (124A) and a second receiving slot (124B), wherein the orthographic projection of the first tube (112A) on the second support (120) is located in the first receiving slot (124A), and the orthographic projection of the second tube (112B) on the second support (120) is located in the second receiving slot (124B), wherein the volume of the first receiving slot (124A) is greater than the volume of the second receiving slot (124B).

10. The support assembly (100) according to claim 6, characterized in that, The first bracket (110) has a first fixing groove (1113) on the side facing the second bracket (120), and the second bracket (120) has a second fixing groove (1211) on the side facing the first bracket (110). The second fixing groove (1211) and the first fixing groove (1113) are arranged opposite to each other. Both the first fixing groove (1113) and the second fixing groove (1211) are used to accommodate a portion of the battery cell (200). The second fixing groove (1211) is connected to the adhesive guide groove (123).

11. The support assembly (100) according to claim 10, characterized in that, A first limiting part (1114) is provided in the first fixing groove (1113), the first limiting part (1114) protrudes from the side wall of the first fixing groove (1113), and the first limiting part (1114) is used to connect the side of the battery cell (200) facing away from the second bracket (120); a second limiting part (1212) is provided in the second fixing groove (1211), and the second limiting part (1212) connects the bottom wall and the side wall of the second fixing groove (1211).

12. The support assembly (100) according to claim 6, characterized in that, The bracket assembly (100) further includes a cover plate (130), which connects the side of the second bracket (120) facing the first bracket (110). The cover plate (130) has a third hole (131) and a fourth hole (132). The first tube (112A) is projected onto the cover plate (130) in the third hole (131), and the second tube (112B) is projected onto the cover plate (130) in the fourth hole (132). The cover plate (130) closes the adhesive guide groove.

13. The support assembly (100) according to claim 1, characterized in that, The first bracket (110) includes a guide post (113), the guide post (113) is connected to the side of the first bracket (110) facing the second bracket (120), the guide post (113) extends along the first direction (001), and the side of the second bracket (120) facing the first bracket (110) is provided with a guide hole (125), and the guide post (113) extends at least partially into the guide hole (125).

14. The support assembly (100) according to claim 13, characterized in that, The guide post (113) includes a third segment (1131) and a fourth segment (1132). The third segment (1131) is connected to the first bracket (110), and the fourth segment (1132) is connected to the end of the third segment (1131) facing away from the first bracket (110). The outer diameter of the third segment (1131) is larger than the outer diameter of the fourth segment (1132), and the fourth segment (1132) extends into the guide hole (125).

15. The support assembly (100) according to claim 1, characterized in that, The support assembly (100) also includes a housing (140), in which the second support (120) is housed.

16. A battery module (1000), characterized in that, It includes a battery cell (200) and a support assembly (100) as described in any one of claims 1-15, wherein the battery cell (200) is fixed in the support assembly (100).

17. A method for dispensing adhesive, characterized in that, The adhesive injection method is used for injecting adhesive into the support assembly as described in any one of claims 1-15, and the adhesive injection method includes: S100, using the first pressure P1 to inject encapsulating adhesive into the first hole and the second hole, detecting that the total mass of the encapsulating adhesive injected reaches the first preset value Q1, and stopping the injection of the encapsulating adhesive with the first pressure P1; S200, continue to inject the encapsulating adhesive into the first hole and the second hole using the second pressure P2, detect that the total mass of the encapsulating adhesive injected reaches the second preset value Q2, and stop injecting the encapsulating adhesive with the second pressure P2; Among them, P2 <P1,70%≤100%×Q1 / Q2≤85%。 18. The dispensing method according to claim 17, characterized in that, 0.2MPa≤P1≤0.5MPa, 0.05MPa≤P2≤0.15MPa, 2≤P1 / P2≤10.

19. The dispensing method according to claim 17, characterized in that, S100 includes: detecting that the total time for pouring the encapsulating adhesive reaches a third preset value t, and / or detecting that the pressure drop for pouring the encapsulating adhesive reaches a fourth preset value δP, and stopping the pouring of the encapsulating adhesive at the first pressure P1. Wherein, the third preset value t is 60%~70% of the total time required for the total mass of the encapsulating adhesive to reach the second preset value Q2, and 0.05MPa≤δP≤0.08MPa.

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