Battery module tensioning device

Abstract

This utility model discloses a battery module tensioning device, relating to the field of battery modules, including an end seat, a connecting seat, a battery module, and a tensioning mechanism. This utility model, through a sliding fit structure of the end seat and connecting seat, completely breaks through the limitations of fixed dimensions in existing tensioning devices, achieving flexible adaptation to battery modules of different specifications. The horizontal plate of the end seat has a guide groove extending along its length, and the guide rod of the connecting seat is embedded in the guide groove for smooth sliding. Combined with the spacing adjustment structure of the bottom fixing screw and connecting sleeve of the end seat, the bearing space size enclosed by the end seat and connecting seat can be adjusted, easily adapting to battery modules of different lengths and widths. The extension plate of the connecting seat and the receiving protrusion of the end seat form a concave-convex fit. The top of the extension plate can assist in supporting the bottom of the battery module, and the receiving protrusion is embedded in the fitting groove of the extension plate, ensuring that the connecting seat does not shift during sliding and providing uniform support for the battery module, avoiding instability due to changes in battery module specifications.

Description

Technical Field

[0001] This utility model belongs to the field of battery module technology, specifically, it relates to a battery module tensioning device. Background Technology

[0002] A battery module is composed of multiple stacked battery modules, which are tightened together by a tensioning structure to prevent loosening and ensure they work together to perform their functions of charging, discharging, and storing electrical energy. With the increasing demand for clean energy, battery modules are widely used in emerging fields such as electric vehicles.

[0003] Utility model CN220021182U discloses a battery module tensioning device, including a first end plate, a second end plate, and a pull rod. By replacing the stainless steel strip with a pull rod, and because the first connecting part is located near the edge of the second end plate and protrudes towards it, while the second connecting part protrudes outwards, the distance between the pull rod and the flow channel opening on the first or second end plate is longer. This results in a longer creepage distance of the coolant to the pull rod, reducing the likelihood of decreased insulation resistance even in the presence of water vapor, thus enhancing electrical safety. Furthermore, since the pull rod is detachably connected to the first and second connecting parts, it does not obstruct the outer end face area of ​​the first or second end plate, thus not affecting the flow channel opening of the end plate or the manifold flow channel design of the battery module. However, this tensioning device is formed by the first end plate, the second end plate, and the pull rod, and the positions of the first and second connecting parts and the length of the pull rod are fixed, making it impossible to flexibly adjust the length, width, and other dimensions of the accommodating position. This structural limitation restricts the device to only accommodate battery modules of specific sizes. If the battery module's length is greater or smaller than the accommodating space, or if there is a slight difference in width, it cannot be inserted smoothly. Even if forced into a fit, excessive gaps between the battery module and the end plate / pull rod may cause loosening, or excessive compression may damage the battery module's casing. In actual production, battery modules often need to be designed with different sizes for different scenarios. The fixing structure cannot meet diverse adaptation needs, significantly limiting versatility and increasing the development and manufacturing costs of products with different specifications. Therefore, this utility model is proposed. Utility Model Content

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0005] Battery module tensioning device, including:

[0006] End seat, which is a frame structure, is used to provide the basic bearing and positioning reference for the overall device;

[0007] A connecting seat, which slides in conjunction with the end seat, is used to assist in supporting the battery module and to form an enclosed positioning with the end seat;

[0008] A battery module, which is disposed within the space enclosed by the end seat and the connecting seat, is a battery module to be tightened and fixed.

[0009] A tensioning mechanism is disposed on the side wall of the end seat and abuts against the top surface of the battery module. It is used to apply a tensioning force to the battery module by manual adjustment to fix the battery module.

[0010] The end seat and the connecting seat are adapted to each other through a guide structure. The end seat is provided with a supporting component for the battery module, and the connecting seat is provided with a mating structure adapted to the supporting component, together ensuring the stable bearing of the battery module.

[0011] Preferably, the end seat includes a side plate, a cross plate, a fixing screw, a connecting sleeve, a first screw groove, a guide groove, and a receiving protrusion;

[0012] The side plate consists of two symmetrically arranged rectangular plates, forming the side support frame of the end seat;

[0013] The horizontal plate is fixedly connected to the lower end of one side of the side plate and is used to support the battery module laterally.

[0014] The fixing screw is fixed to one side of the bottom of the side plate, and the connecting sleeve is disposed between the two side plates. The connecting sleeve is adapted to the fixing screw and is used for the adjustment connection of the two end seats.

[0015] The first screw groove is formed at both ends of the connecting sleeve for connecting and fixing screws;

[0016] The guide groove is formed at one end of the horizontal plate and extends along the length of the horizontal plate to provide sliding guidance for the connecting seat;

[0017] The receiving protrusion is fixed to the top of the horizontal plate and distributed along the length of the horizontal plate. It is used to support the bottom of the battery module, avoid direct contact between the battery module and the upper surface of the horizontal plate, and prevent it from affecting the movement of the connecting seat extension plate.

[0018] Preferably, the connecting seat includes a connecting plate, a guide rod, an extension plate, and a mating groove;

[0019] The connecting plate is a rectangular plate located between two horizontal plates and is used to connect the two end seats;

[0020] The guide rod is a cylindrical rod body, fixed to the lower part of both ends of the connecting plate, and the outer diameter of the guide rod is adapted to the inner diameter of the guide groove on the end seat horizontal plate. The guide rod is embedded in the guide groove to realize the sliding of the connecting seat along the guide groove.

[0021] The extension plate is a rectangular plate extending from the connecting plate toward the end seat. The top of the extension plate contacts the bottom of the battery module to assist in supporting the battery module.

[0022] The mating groove is formed on the extension plate. The shape of the mating groove is adapted to the receiving protrusion of the end seat. The receiving protrusion is embedded in the mating groove to achieve precise positioning of the connecting seat and the end seat, while enhancing the load-bearing stability of the battery module.

[0023] Preferably, the tensioning mechanism includes a pressure plate, a rubber pad, a second screw groove, a movable screw, a handwheel, and a clamping plate;

[0024] The pressure plate is a rectangular plate adapted to the top of the battery module, with one side of the pressure plate facing the battery module and the other side connected to the movable screw.

[0025] The rubber pad is fixed to the side of the pressure plate facing the battery module. It is made of elastic rubber and is used to prevent damage to the battery module shell when pressing the battery module, while also increasing the friction between the pressure plate and the battery module.

[0026] The second screw groove is formed at the middle of both ends of the pressure plate, and the internal thread of the second screw groove is adapted to the external thread of the movable screw.

[0027] One end of the movable screw is inserted into the second screw groove of the pressure plate, and the other end of the movable screw is movably connected to the clamping plate through a bearing. The outer side of the other end of the movable screw is fixedly connected to the handwheel.

[0028] The handwheel is a circular disc structure with anti-slip texture on the edge, used for manual rotation to drive the movable screw to move along the second screw groove, thereby causing the two end seats to move closer or further apart.

[0029] The clamping plate is an L-shaped plate, used to work with the movable screw to tighten the battery module between the two side plates.

[0030] Preferably, the fixing screw and the connecting sleeve cooperate to enhance the connection strength between the two end seats;

[0031] The guide grooves correspond one-to-one with the receiving protrusions to ensure that the bottom of the battery module is subjected to uniform force.

[0032] Preferably, the tensioning mechanism is in multiple sets, distributed at intervals along the width direction of the end plate, with each set of tensioning mechanisms corresponding to a set of battery modules on the horizontal plate, so as to realize the coordinated tensioning adjustment of multiple sets of battery modules;

[0033] The thickness of the rubber pad is 2-5mm, and it can adapt to the small protrusions or depressions on the side of the battery module through its own elastic deformation to ensure that the pressing surface fits.

[0034] The movable screw engages with the second screw groove on the pressure plate to accommodate battery modules of different widths.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] This invention, through a sliding fit structure of end seat and connecting seat, completely breaks through the limitations of fixed size in existing tensioning devices, achieving flexible adaptation to battery modules of different specifications. The horizontal plate of the end seat has a guide groove extending along the length direction, and the guide rod of the connecting seat can slide smoothly by embedding into the guide groove. With the spacing adjustment structure of the fixing screw and connecting sleeve at the bottom of the end seat, the size of the bearing space enclosed by the end seat and the connecting seat can be adjusted, easily adapting to battery modules of different lengths and widths. At the same time, the extension plate of the connecting seat and the receiving convex plate of the end seat form a "concave-convex fit". The top of the extension plate can help support the bottom of the battery module, and the receiving convex plate is embedded in the fitting groove of the extension plate, ensuring that the connecting seat does not deviate when sliding and providing uniform support for the battery module, avoiding the problem of unstable bearing caused by changes in battery module specifications. This design allows the device to be compatible with multiple specifications of battery modules without replacing the core components, significantly improving versatility and reducing the cost of multi-scenario applications.

[0037] This invention perfectly solves the shortcomings of rigid fixing in existing devices through a dual design of "elastic buffer + manual precise adjustment". It can ensure the stable fixing of the battery module and avoid damage to the battery module. On the one hand, the pressure plate of the tensioning mechanism is fixed with an elastic rubber pad facing the battery module. The rubber pad can adapt to the small protrusions or depressions on the surface of the battery module through its own deformation, avoiding scratching or squeezing damage to the battery module shell caused by hard contact. At the same time, the rubber pad can enhance the friction between the pressure plate and the battery module and prevent the battery module from sliding relative to each other when vibrating. On the other hand, the tension force is adjusted by a handwheel and a movable screw, which is convenient for manual force application. The movable screw is threaded with the second screw groove of the pressure plate. Rotating the handwheel can convert the rotational motion into the linear movement of the clamping plate, realizing precise control of the tension force. It does not need to rely on the tightening force of the fasteners to judge, making the operation more intuitive and more accurate. In addition, multiple sets of tensioning mechanisms are distributed at intervals along the width direction of the end plate, each set corresponding to a set of battery modules. They can apply uniform tension force simultaneously, avoiding excessive local stress on the battery module and further improving the fixing stability and battery module protection.

[0038] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0039] In the attached diagram:

[0040] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0041] Figure 2 This is a bottom view of the overall structure of this utility model;

[0042] Figure 3 This is a schematic diagram of the end seat structure of this utility model;

[0043] Figure 4This is a schematic diagram of the connector structure of this utility model;

[0044] Figure 5 This is a schematic diagram of the tensioning mechanism of this utility model;

[0045] In the diagram: End seat 1, side plate 11, fixing screw 12, connecting sleeve 13, first screw groove 14, horizontal plate 15, guide groove 16, receiving protrusion 17, connecting seat 2, connecting plate 21, guide rod 22, extension plate 23, mating groove 24, battery module 3, tensioning mechanism 4, pressure plate 41, rubber pad 42, second screw groove 43, movable screw 44, handwheel 45, clamping plate 46. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0047] like Figures 1 to 5 As shown, the battery module tensioning device includes an end seat 1, a connecting seat 2, a battery module 3, and a tensioning mechanism 4.

[0048] Specifically, end seat 1 is a frame structure used to provide the basic support and positioning reference for the overall device; end seat 1 includes side plate 11, horizontal plate 15, fixing screw 12, connecting sleeve 13, first screw groove 14, guide groove 16 and receiving protrusion 17; side plate 11 consists of two symmetrically arranged rectangular plates, forming the side support frame of end seat 1; horizontal plate 15 is fixedly connected to the lower end of one side of side plate 11, used to horizontally support battery module 3; fixing screw 12 is fixed to the bottom side of side plate 11, and connecting sleeve 13 is disposed between the two side plates 11, and connecting sleeve 13 is adapted to fixing screw 12 for adjusting connection of the two end seats 1; the first screw groove 14, guide groove 16 and receiving protrusion 17; A screw groove 14 is formed at both ends of the connecting sleeve 13 for connecting and fixing screws 12; a guide groove 16 is formed at one end of the horizontal plate 15 and extends along the length of the horizontal plate 15 for providing sliding guidance for the connecting seat 2; a receiving protrusion 17 is fixed to the top of the horizontal plate 15 and distributed along the length of the horizontal plate 15 for supporting the bottom of the battery module 3, avoiding direct contact between the battery module 3 and the upper surface of the horizontal plate 15, and preventing it from affecting the movement of the extension plate 23 of the connecting seat 2. The fixing screws 12 and the connecting sleeve 13 cooperate to enhance the connection strength of the two end seats 1; the guide groove 16 and the receiving protrusion 17 correspond one-to-one to ensure that the bottom of the battery module 3 is subjected to uniform force.

[0049] Specifically, the connecting seat 2 slides with the end seat 1 to assist in supporting the battery module 3 and forming a closed positioning with the end seat 1; the connecting seat 2 includes a connecting plate 21, a guide rod 22, an extension plate 23, and a mating groove 24; the connecting plate 21 is a rectangular plate located between two horizontal plates 15 and is used to connect the two end seats 1; the guide rod 22 is a cylindrical rod fixed to the lower ends of the connecting plate 21, and the outer diameter of the guide rod 22 is adapted to the inner diameter of the guide groove 16 on the horizontal plate 15 of the end seat 1, and the guide rod 22 is embedded in... The connecting seat 2 slides along the guide groove 16 within the guide groove 16; the extension plate 23 is a rectangular plate extending from the connecting plate 21 toward the end seat 1, and the top of the extension plate 23 contacts the bottom of the battery module 3 to assist in supporting the battery module 3; the mating groove 24 is opened on the extension plate 23, and the shape of the mating groove 24 is adapted to the receiving protrusion 17 of the end seat 1. The receiving protrusion 17 is embedded in the mating groove 24 to achieve precise positioning of the connecting seat 2 and the end seat 1, while enhancing the load-bearing stability of the battery module 3.

[0050] More specifically, the tensioning mechanism 4 is located on the side wall of the end seat 1 and abuts against the top surface of the battery module 3. It is used to apply tension to the battery module 3 by manual adjustment to fix the battery module 3. The tensioning mechanism 4 includes a pressure plate 41, a rubber pad 42, a second threaded groove 43, a movable screw 44, a handwheel 45, and a clamping plate 46. The pressure plate 41 is a rectangular plate adapted to the top of the battery module 3. One side of the pressure plate 41 faces the battery module 3, and the other side is connected to the movable screw 44. The rubber pad 42 is fixed to the side of the pressure plate 41 facing the battery module 3. It is made of elastic rubber and is used to prevent damage to the outer shell of the battery module 3 when pressing the battery module 3, while also increasing the friction between the pressure plate 41 and the battery module 3. The second threaded groove 43 is opened at the middle of both ends of the pressure plate 41. The internal thread of the second threaded groove 43 is adapted to the external thread of the movable screw 44. One end of the movable screw 44 is inserted into the second threaded groove 43 of the pressure plate 41. The other end of the movable screw 44 is movably connected to the clamping plate 46 via a bearing, and the outer side of the other end of the movable screw 44 is fixedly connected to the handwheel 45. The handwheel 45 is a circular disc structure with anti-slip texture on the edge, used for manually rotating to drive the movable screw 44 to move along the second screw groove 43, thereby moving the two end seats 1 closer or further apart. The clamping plate 46 is an L-shaped plate, used to cooperate with the movable screw 44 to tighten the battery module 3 between the two side plates 11. There are multiple sets of tightening mechanisms 4, which are distributed at intervals along the width direction of the side plates 11 of the end seats 1. Each set of tightening mechanisms 4 corresponds to a set of battery modules 3 on a horizontal plate 15, realizing the coordinated tightening adjustment of multiple sets of battery modules 3. The rubber pad 42 is 2-5mm thick and can adapt to the small protrusions or depressions on the side of the battery module 3 through its own elastic deformation to ensure that the pressing surface is in contact. The movable screw 44 cooperates with the second screw groove 43 on the pressure plate 41 to adapt to battery modules 3 of different widths.

[0051] More specifically, the battery module 3 is set in the space enclosed by the end seat 1 and the connecting seat 2, and is the battery module 3 to be tightened and fixed; the end seat 1 and the connecting seat 2 are adapted by a guide structure, the end seat 1 is provided with a supporting component for the battery module 3, and the connecting seat 2 is provided with a matching structure adapted to the supporting component, together ensuring that the battery module 3 is stably supported.

[0052] End seat 1 serves as the core load-bearing structure of the device, providing a positioning reference and installation foundation for battery module 3. Two symmetrical side plates 11 form a side support frame. The bottom horizontal plate 15 laterally supports the weight of battery module 3. The supporting protrusions 17 on the top of the horizontal plate 15 are distributed along the length direction, directly supporting the bottom of battery module 3, avoiding direct contact between battery module 3 and horizontal plate 15, preventing interference with the movement of connecting seat 2, and ensuring that battery module 3 is subjected to uniform force. The fixing screw 12 at the bottom of the side plate 11 cooperates with the connecting sleeve 13. The distance between the two end seats 1 can be adjusted by rotating the connecting sleeve 13.

[0053] The connecting seat 2 and the end seat 1 slide together to form an enclosed support space for the battery module 3, ensuring the stable placement of the battery module 3. Guide rods 22 are fixed at the lower ends of the connecting plate 21 of the connecting seat 2. The guide rods 22 are embedded in the guide grooves 16 of the horizontal plate 15 of the end seat 1, and can slide smoothly along the length of the guide grooves 16 to accommodate battery modules 3 of different lengths. The top of the extension plate 23 extending from the connecting plate 21 contacts the bottom of the battery module 3, assisting the horizontal plate 15 in supporting the battery module 3. The mating groove 24 on the extension plate 23 is adapted to the shape of the receiving protrusion 17 of the end seat 1. The receiving protrusion 17 is embedded in the mating groove 24, which not only achieves precise positioning of the connecting seat 2 and the end seat 1, but also prevents the battery module 3 from shifting laterally during the support process.

[0054] The tensioning mechanism 4 applies a stable tension force to the battery module 3 through manual operation, thus firmly fixing the battery module 3. A 2-5mm thick elastic rubber pad 42 is fixed to the side of the pressure plate 41 facing the battery module 3. When tightened, the rubber pad 42 can adapt to the small protrusions or depressions on the surface of the battery module 3 through its own deformation, which not only avoids damage to the outer shell of the battery module 3 by hard contact, but also enhances the friction between the pressure plate 41 and the battery module 3. Turning the handwheel 45 drives the movable screw 44 to rotate synchronously. The movable screw 44 is threaded into the second screw groove 43 at both ends of the pressure plate 41, and the rotational motion is converted into the linear movement of the clamping plate 46. When the handwheel 45 is turned clockwise, the movable screw 44 pushes the clamping plate 46 closer to the battery module 3; when it is turned counterclockwise, it moves away, realizing flexible adjustment of the tension force. The clamping plate 46 has an L-shaped structure and is movably connected to the end of the movable screw 44 through a bearing to ensure that the clamping plate 46 does not rotate when the screw rotates. When the pressure plate 41 presses the battery module 3, the clamping plate 46 abuts against the side plate 11 of the end seat 1. The thrust of the movable screw 44 makes the two end seats 1 move closer together, forming a closed-loop force of "side plate 11-clamping plate 46-pressure plate 41-battery module 3", which firmly fixes the battery module 3 in the enclosed space.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery module tensioning device, characterized by, include: End seat, which is a frame structure, is used to provide the basic bearing and positioning reference for the overall device; A connecting seat, which slides in conjunction with the end seat, is used to assist in supporting the battery module and to form an enclosed positioning with the end seat; A battery module, which is disposed within the space enclosed by the end seat and the connecting seat, is a battery module to be tightened and fixed. A tensioning mechanism is disposed on the side wall of the end seat and abuts against the top surface of the battery module. It is used to apply a tensioning force to the battery module by manual adjustment to fix the battery module.

2. The battery module tensioning device of claim 1, wherein, The end seat includes a side plate, a cross plate, a fixing screw, a connecting sleeve, a first screw groove, a guide groove, and a receiving protrusion. The side plate consists of two symmetrically arranged rectangular plates, forming the side support frame of the end seat; The horizontal plate is fixedly connected to the lower end of one side of the side plate and is used to support the battery module laterally. The fixing screw is fixed to one side of the bottom of the side plate, and the connecting sleeve is disposed between the two side plates. The connecting sleeve is adapted to the fixing screw and is used for the adjustment connection of the two end seats. The first screw groove is formed at both ends of the connecting sleeve for connecting and fixing screws; The guide groove is formed at one end of the horizontal plate and extends along the length of the horizontal plate to provide sliding guidance for the connecting seat; The receiving protrusion is fixed to the top of the horizontal plate and distributed along the length of the horizontal plate to support the bottom of the battery module.

3. The battery module tensioning device of claim 1, wherein, The connecting seat includes a connecting plate, a guide rod, an extension plate, and a mating groove; The connecting plate is a rectangular plate located between two horizontal plates and is used to connect the two end seats; The guide rod is a cylindrical rod body, fixed to the lower part of both ends of the connecting plate, and the outer diameter of the guide rod is adapted to the inner diameter of the guide groove on the end seat horizontal plate. The guide rod is embedded in the guide groove to realize the sliding of the connecting seat along the guide groove. The extension plate is a rectangular plate extending from the connecting plate toward the end seat. The top of the extension plate contacts the bottom of the battery module to assist in supporting the battery module. The mating groove is formed on the extension plate, and the shape of the mating groove is adapted to the receiving protrusion of the end seat, with the receiving protrusion embedded in the mating groove.

4. The battery module tensioning device of claim 1, wherein, The tensioning mechanism includes a pressure plate, a rubber pad, a second screw groove, a movable screw, a handwheel, and a clamping plate; The pressure plate is a rectangular plate adapted to the top of the battery module, with one side of the pressure plate facing the battery module and the other side connected to the movable screw. The rubber pad is fixed to the side of the pressure plate facing the battery module and is made of elastic rubber. The second screw groove is formed at the middle of both ends of the pressure plate, and the internal thread of the second screw groove is adapted to the external thread of the movable screw. One end of the movable screw is inserted into the second screw groove of the pressure plate, and the other end of the movable screw is movably connected to the clamping plate through a bearing. The outer side of the other end of the movable screw is fixedly connected to the handwheel. The handwheel is a circular disc structure with anti-slip texture on the edge, used for manual rotation to drive the movable screw to move along the second screw groove, thereby causing the two end seats to move closer or further apart. The clamping plate is an L-shaped plate, used to work with the movable screw to tighten the battery module between the two side plates.

5. The battery module tensioning device according to claim 2, characterized in that, The fixing screw and the connecting sleeve can enhance the connection strength of the two end seats; the guide groove and the receiving protrusion correspond one-to-one to ensure that the bottom of the battery module is subjected to uniform force.

6. The battery module tensioning device according to claim 4, characterized in that, The tensioning mechanism consists of multiple sets, which are spaced apart along the width direction of the end plate. Each set of tensioning mechanisms corresponds to a set of battery modules on the horizontal plate, thereby enabling the coordinated tensioning and adjustment of multiple sets of battery modules. The thickness of the rubber pad is 2-5mm, and it can adapt to the small protrusions or depressions on the side of the battery module through its own elastic deformation to ensure that the pressing surface fits. The movable screw engages with the second screw groove on the pressure plate to accommodate battery modules of different widths.

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