Battery module cooling assembly and battery module

Abstract

The utility model provides a battery module cooling assembly which comprises side cooling plates and adapters, the side cooling plates are fixed to the two ends of an end plate and provided with cavities, and flow channels are formed in the cavities; the adapter comprises a first fixing structure and a second fixing structure fixedly connected with the first fixing structure, the first fixing structure is provided with a first fixing plate, the first fixing plate is attached to and fixedly connected with the large face of the side cold plate, and the second fixing structure is connected with the end plate. According to the battery module cooling assembly, due to the fact that the connection area between the first fixing structures and the side cooling plates is large, stress generated by thermal expansion and mechanical vibration in the working process of the battery module can be dispersed, the battery module can be better cooled, the battery module cooling assembly is firmer, and therefore the stability and stability of the battery module are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a battery module cooling assembly and a battery module. Background Art

[0002] Currently, the three mainstream cooling methods for battery heat dissipation are natural cooling, air cooling, and liquid cooling. Natural cooling has a lower cost and relies solely on the air flow around the battery to remove the heat from the battery surface. It is mainly suitable for use in some scenarios with good working environments and low requirements for battery heat dissipation. The air cooling method requires the battery box to be equipped with some cooling fans. The rotation of the fans drives the air flow in the box, thereby removing the heat from the inside of the battery. This method is suitable for some use scenarios where the battery sealing performance is not high. Since the battery is connected to the outside, the battery cell is easily affected by external environmental factors, such as humidity, dust, etc., which will affect the battery life over time. The last type is liquid cooling, which removes the heat from the battery through liquid heat exchange in the cooling plate. It is suitable for use in some harsh environments.

[0003] At present, during the battery module molding process, it is necessary to better cool the battery cell modules. Side cold plates are set on both sides of the battery module. During the production process, multiple battery cells are first arranged side by side into a battery cell group, and then end plates are placed at both ends of a column of battery cell groups. Finally, the outer surface of the end plate is clamped with a clamp to reduce the gap between the battery cells. Subsequently, side cold plates are set on both sides of each battery cell group for cooling and dissipating the battery module, so that the battery module has a better cooling effect. In this process, a connection needs to be formed between the side cold plate and the end plate. In the existing battery module, the side cold plate and the end plate are connected by rivets. Since the internal cavity of the side cold plate has a flow channel suitable for liquid heat exchange, the internal flow channel of the side cold plate needs to be avoided during the process of connecting the side cold plate and the end plate by rivets to avoid the side cold plate from losing its heat dissipation effect. Therefore, the size and setting position of the rivet installation are limited, which limits the fastening effect of the rivet, and the connection strength between the side cold plate and the end plate cannot be guaranteed, resulting in an unstable battery module structure. In addition, during use, due to the swelling of the battery cell, the rivet needs to withstand the shear force generated by the relative displacement of the end plate and the side cold plate under the swelling of the battery cell. Some rivets may break, which may lead to the possibility of damage and disintegration of the frame structure of the battery module.

[0004] Therefore, there is an urgent need for a battery module cooling assembly and a battery module, so that the battery module can be better cooled and the battery module cooling assembly can be more solid, thereby ensuring the firmness and stability of the battery module. Utility Model Content

[0005] The present application provides a battery module cooling assembly and a battery module, which can prevent the side cold plates from being damaged and failing during the connection process between the side cold plates and the end plates, thereby ensuring the firmness and stability of the battery module.

[0006] In the first aspect, the present application provides a battery module cooling assembly, including: a side cold plate, which is fixed at both ends of the end plate and has a cavity in which a flow channel is provided; an adapter, which includes a first fixed structure and a second fixed structure fixedly connected to the first fixed structure, the first fixed structure having a first fixed plate, the first fixed plate is in contact with and fixedly connected to the large surface of the side cold plate, and the second fixed structure is connected to the end plate.

[0007] With the above solution, the side cold plates are fixed to both ends of the end plates. This layout ensures cooling on both sides of the battery module, thereby improving the thermal management efficiency of the entire battery module. The cavity in the side cold plates is equipped with flow channels, which serve as pathways for the flow of coolant. The flow of coolant in the flow channels effectively absorbs heat generated by the battery module and removes it through heat exchange. The adapter comprises a first fixing structure and a second fixing structure, providing dual mechanical protection. The first fixing plate is fixedly connected to the large surface of the side cold plate, while the second fixing structure connects the first fixing structure to the end plate, forming a stable mechanical connection. The large contact area between the first fixing plate and the side cold plate means that the contact area between the two is large, making the connection between the side cold plate and the first fixing plate more stable. This design helps to distribute stress caused by thermal expansion and mechanical vibration during battery module operation. This design ensures that the connection between the side cold plate and the first fixing plate remains stable even under these stresses, preventing loosening or fracture of the side cold plate. By connecting the second fixing structure to the end plate, the side cold plate and the end plate are effectively fixed, which not only avoids the side cold plate and the end plate from being damaged and failing during the connection process, but also ensures the long-term stable operation of the cooling assembly.

[0008] In a possible design, the first fixing structure further includes an adhesive layer and a limiting component. The adhesive layer is located between the first fixing plate and the side cold plate. The limiting component and the side cold plate fix the first fixing plate to the side cold plate.

[0009] In the above solution, the adhesive layer is located between the first fixing plate and the side cold plate. Its primary function is to securely bond the first fixing plate to the side cold plate. This design improves structural stability, ensuring that the side cold plate does not shift or fall off due to thermal and mechanical stresses during battery module operation. The adhesive layer is typically made of a material with excellent bonding and heat resistance to ensure failure within the battery module's operating temperature range. A retaining member, in conjunction with the side cold plate, secures the first fixing plate in its correct position on the side cold plate. The retaining member prevents the first fixing plate from shifting during installation, thereby ensuring accurate alignment between the coolant flow channel and the battery module. The combination of the adhesive layer and retaining member in the first fixing structure enhances the structural strength and reliability of the entire cooling assembly. Shear forces generated by the expansion of the battery module are transferred to the adhesive layer and retaining member. This design allows the battery module to withstand various stresses caused by temperature fluctuations and mechanical vibration without damage or failure throughout its service life. The use of adhesive layers and limiting components helps to disperse the stress generated by thermal expansion and mechanical vibration during battery module operation, thereby better protecting the side cold plates and end plates from damage and extending the service life of the battery module cooling assembly.

[0010] In one possible design, the first fixed plate includes a first plate surface in contact with the outer surface of the side cold plate and a second plate surface in contact with the inner surface of the side cold plate, an adhesive layer is provided between the first plate surface and the outer surface of the side cold plate, and an adhesive layer is provided between the second plate surface and the inner surface of the side cold plate.

[0011] With the above solution, by providing a first plate surface in contact with the outer surface of the side cold plate and a second plate surface in contact with the inner surface, forces generated by thermal expansion or mechanical stress are evenly distributed across both sides of the side cold plate. This helps reduce the potential risk of damage due to stress concentration. Furthermore, the two adhesive layers provide additional fixing points, enhancing the stability of the entire structure. This design ensures that the side cold plate remains fixed under all operating conditions and prevents displacement due to vibration or temperature fluctuations. The presence of two adhesive layers means that even if one adhesive layer degrades or damages, the other can still provide fixing, thereby improving the durability and reliability of the structure. Furthermore, the adhesive layer material has excellent thermal conductivity, which enhances heat transfer between the side cold plate and the first fixing plate, thereby improving cooling efficiency. If the cooling assembly needs maintenance or replacement, this design makes it easier to remove and reinstall the side cold plate, as the adhesive layer acts as a buffer between the side cold plate and the first fixing plate.

[0012] In a possible design, the first fixing plate further includes a connecting portion, and the first plate surface and the second plate surface are connected via the connecting portion.

[0013] Through this solution, the connecting portion connects the first and second panels into one, allowing the connecting portion to serve as a reference point during assembly. This makes it easier to align and secure the first fixing plate to the side cold plate, improving the efficiency and accuracy of the assembly process. The connecting portion can also serve as a gripping or removal point, facilitating the removal and installation of the adapter from the side cold plate. Furthermore, the design of the connecting portion helps to more effectively distribute stress between different parts of the first fixing plate, reducing localized stress concentrations and thereby improving the durability and reliability of the structure.

[0014] In one possible design, the limiting component includes a rivet component, a snap-on component, or a Velcro component.

[0015] Through the above scheme, when the large surface of the first fixing plate and the side cold plate are fitted and fixedly connected, the shear force generated by the expansion of the battery module is converted into the adhesive layer and the limiting component, among which the adhesive layer bears most of the shear force. Since the contact surface between the first fixing plate and the side cold plate is large, the shear force is relatively dispersed. At this time, the shear force that the limiting component needs to bear is only a small part, that is, it only needs to meet the fastening and positioning functions between the adapter and the side cold plate, and will not cause breakage or failure due to shear force. The limiting component is composed of a rivet assembly, a snap-on bite assembly or a Velcro assembly. The rivet assembly can provide a relatively firm connection and is not easy to fall off. The snap-on bite assembly can be quickly assembled and disassembled, which is convenient for maintenance and replacement. The Velcro is easy to install and maintain and is softer, which helps to absorb slight vibrations and impacts, making the fixed connection between the adapter and the side cold plate more reliable, thereby improving the safety and effectiveness of the side cold plate.

[0016] In a possible design, the second fixing structure includes a second fixing plate, which is arranged perpendicular to the first fixing plate, and the second fixing plate abuts against an outer surface of the end plate.

[0017] With this solution, the second fixing plate is designed perpendicular to the first, allowing it to directly abut the outer surface of the end plate. This ensures a more reliable connection between the second fixing plate and the end plate, reducing displacement caused by vibration or thermal expansion during battery module operation. The second fixing plate simplifies the assembly process by providing a visual reference surface, making it easier to align the side cold plate with the end plate, which is connected to the adapter, and improving installation efficiency.

[0018] In a possible design, second fixing plates are fixed on both sides of the first fixing structure.

[0019] Through the above solution, considering that there are multiple rows of battery cell groups in the battery module, side cold plates will be set on both sides of each row of battery cell groups. Therefore, when both sides of the middle side cold plate need to be fixed to the end plate, in the structural design of the adapter, second fixed plates are fixed on both sides of the first fixed structure, which can ensure that the side cold plates and the end plates on both sides form a stable connection, so as to avoid the side cold plates and the end plates from being damaged and failing during the connection process, thereby ensuring the long-term stable operation of the cooling assembly.

[0020] In a possible design, a first bolt hole is provided on the second fixing plate, and a second bolt hole is provided on the corresponding end plate. Bolts pass through the first bolt hole and the second bolt hole to fix the second fixing plate to the outer surface of the end plate.

[0021] The bolted connection provides a very stable connection, connecting the second fixing plate to the end plate via bolts, thereby making the connection between the end plate and the second fixing plate tighter. Furthermore, the bolted connection allows the connection between the second fixing plate and the end plate to be detachable, which facilitates maintenance and replacement work because the bolts can be removed relatively easily to separate or reinstall the fixing plates.

[0022] In a possible design, the second fixing plate has a first side facing the battery cell group and a second side facing away from the battery cell group, and the first fixing plate is fixed to the first side or the second side.

[0023] Through the above scheme, since the second fixing plate is fixed to the end plate, when the first fixing plate is set on the first side of the second fixing plate facing the battery cell group, the first fixing plate is installed on the side cold plate and is on the side of the battery cell group, which can be understood as the first fixing plate is embedded between the battery cell group and the side cold plate, and the embedded manner makes the connection between the side cold plate and the end plate look more beautiful; when the first fixing plate is set on the second side of the second fixing plate facing away from the battery cell group, the first fixing plate is located on the side cold plate protruding from the end plate, which can be understood as the first fixing plate is embedded in the side cold plate outside the battery cell group. This external embedding manner can appropriately increase the area of ​​the first fixing plate, thereby ensuring the contact area between the first fixing plate and the side cold plate, which is more conducive to dispersing shear force and improving the stability of the battery module cooling assembly.

[0024] In a second aspect, the present application provides a battery module comprising a battery cell group and any one of the above-mentioned battery module cooling components.

[0025] The beneficial effects of the battery module provided in the second aspect and each possible design of the second aspect can be referred to the beneficial effects brought about by the first aspect and each possible implementation method of the first aspect, and will not be repeated here.

[0026] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 A schematic diagram of a battery module cooling assembly from one perspective provided in one embodiment of the present application.

[0029] Figure 2 This is a structural explosion diagram of the battery module cooling assembly provided in one embodiment of the present application from another perspective.

[0030] Figure 3 for Figure 1 Cross-sectional view along direction A-A1.

[0031] Figure 4 A schematic diagram of the adapter structure provided in one embodiment of the present application.

[0032] Figure 5 for Figure 4 Top view of .

[0033] Figure 6 for Figure 4 Left view of .

[0034] Figure 7 A schematic diagram of the adapter structure provided in another embodiment of the present application.

[0035] Figure 8 for Figure 7 Left view of .

[0036] Figure 9 for Figure 7 Right view of .

[0037] Figure 10 for Figure 7 Top view of .

[0038] Figure 11 Schematic diagram of a battery module in which a first fixing plate is fixed to a first side of a second fixing plate according to an embodiment of the present application.

[0039] Figure 12 for Figure 11 Enlarged schematic diagram of the local location.

[0040] Figure 13 This is a schematic diagram of a battery module in which a first fixing plate is fixed to a second side of a second fixing plate according to an embodiment of the present application.

[0041] Figure 14 for Figure 13 A partial schematic diagram of the cooling assembly in FIG.

[0042] Figure 15 for Figure 14 Another exploded view of the cooling assembly.

[0043] Explanation of the accompanying drawings: 100, side cold plate; 110, water pipe joint; 200, adapter; 210, first fixed plate; 220, second fixed plate; 230, adhesive layer; 241, limiting component; 201, first plate surface; 202, second plate surface; 203, connecting part; 300, end plate; 310, battery cell group; 250, avoidance opening. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0046] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] The term "and / or" in this document simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists, A and B exist, and B exists. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0048] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the cooling assembly of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., which indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0049] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0050] In the description of this application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two (including two).

[0051] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, "connected" or "connected" in a mechanical structure can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection via a barrier, such as a screw, bolt, or other barrier. A physical connection can also be a removable connection, such as a snap-fit ​​connection. A physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. "Connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as circuit connectivity is achieved. It can also refer to internal communication between two components. A signal connection can refer not only to signal connection through an electrical circuit, but also to signal connection through a media medium, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] Side cold plates, as cooling components in battery modules, are installed on the sides of the cell pack to cool the cells. During the battery module manufacturing process, end plates are installed at both ends of the cell pack, so the side cold plates need to be fixedly connected to the end plates. Currently, battery modules are prone to failure due to the failure of the connection between the side cold plates and the end plates during long-term use.

[0053] After analysis, the reason for the failure of the connection between the side cold plate and the end plate is that there is a flow channel suitable for liquid heat exchange in the internal cavity of the side cold plate. In the process of connecting the side cold plate and the end plate through rivets, it is necessary to avoid the internal flow channel of the side cold plate to prevent the side cold plate from losing its heat dissipation effect. Therefore, the size and setting position of the rivet installation are limited, which limits the fastening effect of the rivet, and the connection strength between the side cold plate and the end plate cannot be guaranteed, resulting in the battery module structure being not stable enough. In addition, during use, due to the swelling problem of the battery cell, the rivet needs to withstand the shear force generated by the relative displacement of the end plate and the side cold plate under the swelling of the battery cell. Some rivets may break, which may lead to the possibility of the frame structure of the battery module being destroyed and falling apart.

[0054] In view of this, an embodiment of the present application provides a battery module cooling assembly and a battery module, wherein the battery module cooling assembly includes a side cold plate and an adapter, wherein the adapter is composed of a first fixing structure and a second fixing structure, wherein the first fixing plate is fixedly connected to the large surface of the side cold plate, and the second fixing structure connects the first fixing structure to the end plate, forming a stable mechanical connection. Since the area of ​​the connection between the first fixing structure and the side cold plate is large, the stress generated by thermal expansion and mechanical vibration of the battery module during operation can be dispersed, so that the battery module can be better cooled and the battery module cooling assembly is more secure, thereby ensuring the stability and stability of the battery module.

[0055] Figure 1 A schematic diagram of a battery module cooling assembly from one perspective provided in an embodiment of the present application. Figure 2 This is an exploded view of the battery module cooling assembly from another perspective provided in the embodiment of this application. Figure 1 and Figure 2 The battery module cooling assembly provided in this embodiment includes a side cold plate 100 and an adapter 200. The side cold plate 100 is fixed to both ends of the end plate 300 and has a cavity with a flow channel provided in the cavity; the adapter 200 includes a first fixing structure and a second fixing structure fixedly connected to the first fixing structure. The first fixing structure has a first fixing plate 210. The first fixing plate 210 is in contact with and fixedly connected to the large surface of the side cold plate 100. The second fixing structure is connected to the end plate 300.

[0056] Through the above solution, the side cold plates 100 are fixed to both ends of the end plate 300. This layout ensures cooling on both sides of the battery module, thereby improving the thermal management efficiency of the entire battery module. The cavity in the side cold plate 100 is equipped with a flow channel, which serves as a conduit for the flow of coolant. The flow of coolant in the flow channel effectively absorbs heat generated by the battery module and removes it through heat exchange. The adapter 200 includes a first fixing structure and a second fixing structure, providing dual mechanical protection. The first fixing plate 210 is fixedly connected to the large surface of the side cold plate 100, while the second fixing structure connects the first fixing structure to the end plate 300, forming a stable mechanical connection. The large contact area between the first fixing plate 210 and the side cold plate 100 means that the contact area between the two is large, making the connection between the side cold plate 100 and the first fixing plate 210 more stable. This design helps to distribute stress caused by thermal expansion and mechanical vibration during battery module operation. This design ensures that even under these stresses, the connection between the side cold plate 100 and the first fixing plate 210 remains secure, preventing loosening or breakage of the side cold plate 100. The connection between the second fixing structure and the end plate 300 effectively secures the side cold plate 100 to the end plate 300, preventing damage and failure during the connection process and ensuring long-term stable operation of the cooling assembly.

[0057] Figure 3 for Figure 1 Cross-sectional view along the A-A1 direction. Please refer to Figure 3 The first fixing structure also includes an adhesive layer 230 and a limiting component 241. The adhesive layer 230 is located between the first fixing plate 210 and the side cold plate 100. The limiting component 241 and the side cold plate 100 fix the first fixing plate 210 to the side cold plate 100.

[0058] Through the above solution, the adhesive layer 230 is located between the first fixed plate 210 and the side cold plate 100, and its main function is to tightly bond the first fixed plate 210 to the side cold plate 100 by bonding. This design can improve the stability of the structure and ensure that the side cold plate 100 will not be displaced or fall off due to thermal stress and mechanical stress when the battery module is working. The adhesive layer 230 is usually made of a material with good bonding properties and heat resistance to ensure that it will not fail within the operating temperature range of the battery module. The limiting component 241 cooperates with the side cold plate 100 to fix the first fixed plate 210 and ensure its correct position on the side cold plate 100. The limiting component 241 can prevent the first fixed plate 210 from shifting during the installation process, thereby ensuring the alignment accuracy between the coolant flow channel and the battery module. The combined use of the adhesive layer 230 and the limiting component 241 in the first fixed structure enhances the structural strength and reliability of the entire cooling assembly. It is understandable that when the end plate 300 and the side cold plate 100 were originally connected solely by screws, the shear force that the screws had to withstand is now transferred to the adhesive layer 230 and the limiting component 241 between the first fixing plate 210 and the side cold plate 100. This design can withstand various stresses caused by temperature changes and mechanical vibrations throughout the service life of the battery module without damage or failure. The use of the adhesive layer 230 and the limiting component 241 helps to disperse the stress generated by thermal expansion and mechanical vibration during battery module operation, thereby better protecting the side cold plate 100 and end plate 300 from damage and extending the service life of the battery module cooling assembly.

[0059] In one possible design, the limiting component 241 includes a rivet assembly, a snap-on assembly, or a Velcro assembly.

[0060] In some embodiments, the limiting component 241 can be a rivet assembly, wherein rivet holes or screw holes are pre-set at positions corresponding to the first fixing plate 210 and the side cold plate 100, and then when the adapter 200 is installed on the side cold plate 100, the screws are passed through the rivet or screw holes to fix it.

[0061] In some embodiments, the limiting component 241 can be a snap-on assembly, and can be designed with a raised structure and a recessed structure. For example, a raised structure is provided at the location on the side cold plate 100 where the first fixing plate 210 is to be installed, and a recessed structure is provided at a corresponding location on the first fixing plate 210. When installed, the raised and recessed structures engage with each other, securing and limiting the first fixing plate 210 and the side cold plate 100. The raised and recessed structures can increase the bonding area and improve the firmness between the side cold plate 100 and the adapter 200.

[0062] In some embodiments, the limiting component 241 can be designed as a barb structure. For example, a barb structure is set at a preset position of the first fixed plate 210. When the adapter plate is installed on the side cold plate 100, the barb structure can press out a corresponding pit on the side cold plate 100, and due to the barb structure, the first fixed plate 210 can be fixed with the side cold plate 100 and play a limiting role.

[0063] In some embodiments, the retaining member 241 can be a combination of two Velcro strips, each provided on opposite surfaces of the side cold plate 100 and the adapter 200. These two strips connect the side cold plate 100 and the adapter 200. When the battery module's expansion force increases, the two strips adhere to each other, resisting the expansion force. The principle is that the two Velcro strips are easy to pull apart in the thickness direction but difficult to pull apart in the length direction. Therefore, the length direction is set to be the same as the direction of the expansion force.

[0064] When the first fixing plate 210 is attached to and fixedly connected to the large surface of the side cold plate 100, the shear force generated by the expansion of the battery module is converted to the adhesive layer 230 and the limiting component 241, among which the adhesive layer 230 bears most of the shear force. Due to the large contact surface between the first fixing plate 210 and the side cold plate 100, the shear force is relatively dispersed. At this time, the limiting component 241 only needs to bear a small part of the shear force, that is, it only needs to meet the fastening and positioning functions between the adapter 200 and the side cold plate 100, and will not cause breakage or failure due to shear force. In addition, the limiting component 241 is composed of a rivet assembly, a snap-on assembly, or a Velcro assembly. The rivet assembly can provide a relatively firm connection and is not easy to fall off. The snap-on assembly can be quickly assembled and disassembled, which is convenient for maintenance and replacement. The Velcro is easy to install and maintain and is softer, which helps to absorb slight vibrations and impacts, making the fixed connection between the adapter 200 and the side cold plate 100 more reliable, thereby improving the safety and effectiveness of the side cold plate 100.

[0065] It is understood that the adhesive area is related to the expansion force of the battery module. The minimum area is the expansion force divided by the shear force of the adhesive surface. In the case of insufficient space utilization, when the adhesive area is smaller than the minimum area, the cooperation of the limiting component 241 can also bear part of the shear force.

[0066] Figure 4 This is a structural diagram of an adapter 200 provided in one embodiment of the present application. Figure 5 for Figure 4 Top view of . Figure 6 for Figure 4 Please refer to the left side view of Figure 4 、 Figure 5 and Figure 6The first fixing plate 210 includes a first plate surface 201 in contact with the outer surface of the side cold plate 100 and a second plate surface 202 in contact with the inner surface of the side cold plate 100. Figure 3 An adhesive layer 230 is provided between the first plate surface 201 and the outer surface of the side cold plate 100 , and an adhesive layer 230 is provided between the second plate surface 202 and the inner surface of the side cold plate 100 .

[0067] With the above solution, by providing a first plate surface 201 in contact with the outer surface of the side cold plate 100 and a second plate surface 202 in contact with the inner surface of the side cold plate 100, the forces generated by thermal expansion or mechanical stress are evenly distributed on both sides of the side cold plate 100. This helps reduce the potential risk of damage due to stress concentration. Furthermore, the two adhesive layers 230 provide additional fixing points, enhancing the stability of the entire structure. This design ensures that the side cold plate 100 remains fixed under various operating conditions and prevents displacement due to vibration or temperature fluctuations. The presence of two adhesive layers 230 means that even if one adhesive layer 230 degrades or damages, the other can still provide fixing, thereby improving the durability and reliability of the structure. Furthermore, the adhesive layer 230 material has excellent thermal conductivity, which enhances heat conduction between the side cold plate 100 and the first fixing plate 210, thereby improving cooling efficiency. If the cooling assembly needs to be maintained or replaced, this design may make it easier to remove and reinstall the side cold plate 100 because the adhesive layer 230 can serve as a buffer between the side cold plate 100 and the first fixing plate 210 .

[0068] The first fixing plate 210 further includes a connecting portion 203 , through which the first plate surface 201 and the second plate surface 202 are connected.

[0069] Through the above solution, the connecting portion 203 connects the first plate surface 201 and the second plate surface 202 into one piece, allowing the connecting portion 203 to serve as a reference point during assembly, making it easier to align and secure the first fixing plate 210 to the side cold plate 100, thereby improving the efficiency and accuracy of the assembly process. The connecting portion 203 can also serve as a gripping or removal point, making it easier to remove and install the adapter 200 from the side cold plate 100. Furthermore, the design of the connecting portion 203 helps to more effectively distribute stress between different parts of the first fixing plate 210, reducing local stress concentration, thereby improving the durability and reliability of the structure.

[0070] In a possible design, the second fixing structure includes a second fixing plate 220 . The second fixing plate 220 is arranged perpendicular to the first fixing plate 210 , and the second fixing plate 220 abuts against an outer surface of the end plate 300 .

[0071] The above-described arrangement, in which the second fixing plate 220 is perpendicular to the first fixing plate 210, allows for direct contact between the second fixing plate 220 and the outer surface of the end plate 300. This ensures a more reliable connection between the second fixing plate 220 and the end plate 300, reducing displacement caused by vibration or thermal expansion during battery module operation. The provision of the second fixing plate 220 simplifies the assembly process by providing an intuitive reference surface, making it easier to align the side cold plate 100, with the adapter 200 attached, with the end plate 300, improving installation efficiency.

[0072] Figure 7 This is a structural schematic diagram of an adapter 200 provided in another embodiment of the present application. Figure 8 for Figure 7 Left view of . Figure 9 for Figure 7 Right view of . Figure 10 for Figure 7 Please refer to the top view of Figures 7 to 10 , second fixing plates 220 are fixed on both sides of the first fixing structure.

[0073] Figure 11 Schematic diagram of a battery module in which a first fixing plate 210 is fixed to a first side of a second fixing plate 220 according to an embodiment of the present application. Figure 13 Schematic diagram of a battery module in which the first fixing plate 210 is fixed to the second side of the second fixing plate 220 provided in an embodiment of the present application. Figure 11 and Figure 13 It is understood that the battery module has multiple rows of cell groups 310, and side cold plates 100 are installed on both sides of each row of cell groups 310. Therefore, there is a situation where both sides of the middle side cold plate 100 need to be fixed to the end plate 300. Therefore, considering the application scenario where both sides of the middle side cold plate 100 need to be fixed to the end plate 300, the structural design of the adapter 200 is that the second fixing plate 220 is fixed on both sides of the first fixing structure. This ensures that the side cold plate 100 and the end plate 300 on both sides form a stable connection, thereby preventing the side cold plate 100 and the end plate 300 from being damaged and failing during the connection process, ensuring the long-term stable operation of the cooling assembly.

[0074] Please refer to Figure 4 、 Figure 7 、 Figure 11 and Figure 13 A first bolt hole is provided on the second fixing plate 220 , and a second bolt hole is provided on the corresponding end plate 300 . Bolts pass through the first bolt hole and the second bolt hole to fix the second fixing plate 220 on the outer surface of the end plate 300 .

[0075] Through the above solution, the bolt connection provides a very stable connection method, connecting the second fixing plate 220 and the end plate 300 through the bolts, so that the connection between the end plate 300 and the second fixing plate 220 is tighter. In addition, the bolt connection allows the connection between the second fixing plate 220 and the end plate 300 to be detachable, which facilitates maintenance and replacement work because the bolts can be relatively easily removed to separate or reinstall the fixing plates.

[0076] In a possible design, the second fixing plate 220 has a first side facing the battery cell group 310 and a second side facing away from the battery cell group 310 , and the first fixing plate 210 is fixed on the first side or the second side.

[0077] Figure 12 for Figure 11 Enlarged schematic diagram of the local location. Figure 14 for Figure 13 A partial schematic diagram of the cooling components in the . Please refer to Figure 11 、 Figure 12 and Figure 13 Since the second fixing plate 220 is fixed on the end plate 300, when the first fixing plate 210 is set on the first side of the second fixing plate 220 facing the battery cell group 310, the first fixing plate 210 is installed on the side cold plate 100 and is on the side of the battery cell group 310. It can be understood that the first fixing plate 210 is embedded between the battery cell group 310 and the side cold plate 100. The embedded manner makes the connection between the side cold plate 100 and the end plate 300 look more beautiful.

[0078] It can be understood that the area of ​​the outer contact surface of the adapter 200 on the side cold plates 100 on the two sides of the battery module can be increased as much as possible and extended in the arrangement direction of the battery cell group 310 to exceed the position of the end plate 300, so as to increase the contact area between the first fixed plate 210 and the side cold plate 100 as much as possible. Since the stress generated on the adapter 200 when the battery cell swells is dispersed over the entire contact area between the first fixed plate 210 and the side cold plate 100, the larger the contact area, the stronger the ability to disperse the stress generated on the adapter 200 when the battery cell swells, thereby reducing the risk of damage and failure of the side cold plate 100.

[0079] Figure 14 for Figure 13 A partial schematic diagram of the cooling assembly in FIG. Figure 15 for Figure 14Exploded view of the cooling assembly from another perspective. It is understandable that, since the side cold plate 100 has a flow channel inside and a water pipe joint 110 is provided at the end of the side cold plate 100, when the first fixing plate 210 is provided on the second side of the second fixing plate 220 away from the battery cell group 310, an avoidance opening 250 needs to be provided on the first fixing plate 210 to avoid the water pipe joint 110, as shown in FIG. Figure 15 shown.

[0080] Through the above scheme, when the first fixing plate 210 is set on the second side of the second fixing plate 220 away from the battery cell group 310, the first fixing plate 210 is located on the side cold plate 100 protruding from the end plate 300. It can be understood that the first fixing plate 210 is embedded in the side cold plate 100 outside the battery cell group 310. This external embedding method can appropriately increase the area of ​​the first fixing plate 210, thereby ensuring the contact area between the first fixing plate 210 and the side cold plate 100, which is more beneficial to dispersing the shear force and improving the stability of the battery module cooling assembly.

[0081] Based on the above embodiments, this embodiment further provides a battery module, including a battery cell group 310 and the above-mentioned battery module cooling assembly. Since the structure and beneficial effects of the battery module cooling assembly have been described in detail in the previous embodiments, this application will not repeat them here.

[0082] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery module cooling assembly, characterized in that: include: Side cooling plates, fixed at both ends of the end plates, having a cavity in which a flow channel is provided; The adapter comprises a first fixing structure and a second fixing structure fixedly connected to the first fixing structure, the first fixing structure has a first fixing plate, the first fixing plate is in contact with and fixedly connected to the large surface of the side cold plate, and the second fixing structure is connected to the end plate.

2. The battery module cooling assembly according to claim 1, characterized in that: The first fixing structure further includes an adhesive layer and a limiting component. The adhesive layer is located between the first fixing plate and the side cold plate. The limiting component and the side cold plate fixedly connect the first fixing plate to the side cold plate.

3. The battery module cooling assembly according to claim 2, characterized in that: The first fixed plate includes a first plate surface in contact with the outer surface of the side cold plate and a second plate surface in contact with the inner surface of the side cold plate, the bonding layer is provided between the first plate surface and the outer surface of the side cold plate, and the bonding layer is provided between the second plate surface and the inner surface of the side cold plate.

4. The battery module cooling assembly according to claim 3, characterized in that: The first fixing plate further includes a connecting portion, and the first plate surface and the second plate surface are connected by the connecting portion.

5. The battery module cooling assembly according to claim 2, characterized in that: The limiting component includes a rivet component, a snap-on component or a Velcro component.

6. The battery module cooling assembly according to claim 1, characterized in that: The second fixing structure includes a second fixing plate, which is arranged perpendicular to the first fixing plate, and the second fixing plate abuts against the outer surface of the end plate.

7. The battery module cooling assembly according to claim 6, characterized in that: The second fixing plates are fixed on both sides of the first fixing structure.

8. The battery module cooling assembly according to claim 6, characterized in that: The second fixing plate is provided with a first bolt hole, and the corresponding second bolt hole is provided on the end plate. Bolts pass through the first bolt hole and the second bolt hole to fix the second fixing plate to the outer surface of the end plate.

9. The battery module cooling assembly according to claim 6, characterized in that: The second fixing plate has a first side facing the battery cell group and a second side facing away from the battery cell group, and the first fixing plate is fixed to the first side or the second side.

10. A battery module, characterized in that: It comprises a battery cell group and a battery module cooling assembly according to any one of claims 1 to 9.

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