Module end plate capable of resisting battery expansion force

Abstract

The invention relates to the technical field of batteries, in particular to a module end plate capable of resisting battery expansion force. Comprising a fixed plate which is fixedly connected to one side, facing a battery cell, of an outer frame; the central frame is fixedly connected to the central area of the fixed plate; the side pressing plates are rotationally connected to the two sides of the center frame respectively; the transfer plate is fixedly connected between the side pressing plate and the center frame, one end of the transfer plate is connected with the center frame, and the other end is connected to the side end, away from the center frame, of the side pressing plate; the connecting end strip is slidably connected between the side pressing plate and the fixing plate, one end slides with the side end, away from the center frame, of the side pressing plate, and the other end slides with the edge of the corresponding side of the fixing plate. According to the invention, the partial pressure structure is used to adapt to the expansion force of the battery cell in different directions, effective decomposition and transmission of asymmetric loads are realized, and premature fatigue and even damage of key parts due to stress concentration are avoided, so that the adaptability and stability of the battery cell expansion force in the random direction are improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a module end plate that resists battery swelling force. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage systems, lithium-ion battery modules have become the core energy supply unit due to their advantages such as high energy density, long cycle life, and stable and safe structure. Battery modules are typically composed of multiple individual cells connected in series or parallel. To prevent displacement or structural damage to individual cells during charge-discharge cycles due to expansion or other factors, a specially designed module constraint structure is required to fix and constrain them. The end plate and steel strip structure are key components of this constraint structure. The steel strip tightly connects the end plate to the individual battery cells in the middle of the module, forming a lateral or circumferential fastening force on the individual cells.

[0003] However, during the long-term charge and discharge cycle of the battery module, due to factors such as cell aging, uneven temperature distribution, and differences in manufacturing processes, the expansion behavior of the battery has significant randomness and directional uncertainty. The expansion force cannot be effectively distributed to the entire structure, but instead concentrates on local areas of the end plate and steel strip, causing the stress on these local areas to far exceed the yield limit or strength limit of the material. After long-term operation, the local stress concentration points are more prone to damage, which greatly affects the service life and safety of the battery module. Summary of the Invention

[0004] To address the shortcomings of the prior art, this invention provides a module end plate that can construct a reasonable force transmission path to resist battery expansion force, thereby effectively dispersing the battery expansion force, extending the structural constraint effect between the end plate and the steel strip, and ensuring the long-term stability and safety of the battery module.

[0005] The technical implementation of the present invention is as follows: a module end plate for resisting battery expansion force, comprising: an outer frame, an end plate and a steel strip, the main body of the end plate being composed of longitudinal reinforcing ribs on both sides and at least two transverse reinforcing ribs fixed therebetween; characterized in that: the device further comprises: a two-part pressure-reducing structure, respectively disposed between the end plates on both sides and the corresponding battery cells, for coordinating the end plates and the steel strip to achieve uniform dispersion and support of the battery cell expansion force; Each pressure-bearing structure includes: a fixed plate, fixedly connected to the side of the outer frame facing the battery cell; a central frame, fixedly connected to the central area of ​​the fixed plate; side pressure plates, rotatably connected to both sides of the central frame, with their surfaces flush with the central frame surface and parallel to the fixed plate; a transfer plate, fixedly connected between the side pressure plates and the central frame, with one end connected to the central frame and the other end connected to the side end of the side pressure plates away from the central frame, realizing directional force transfer; and a connecting strip, slidably connected between the side pressure plates and the fixed plate, with one end sliding with the side end of the side pressure plates away from the central frame and the other end sliding with the corresponding edge of the fixed plate, forming a movable connection.

[0006] Optionally, the transfer plate, the center frame, and the side pressure plate can be integrated into a single molded structure.

[0007] Optionally, each reinforcing rib adopts a U-shaped groove structure, with the horizontal reinforcing rib perpendicularly connected to the longitudinal reinforcing rib, and the connection joint between the two is fixed by welding.

[0008] Optionally, the transverse reinforcing ribs are provided with embedded grooves in the center, respectively provided on the transverse reinforcing ribs at both ends of each steel strip. The device further includes: a release structure provided in each embedded groove for releasing the tension of the steel strip. Each set of release structures includes: a mounting frame, fixedly connected to the inner groove; guide rollers, rotatably connected to both sides of the mounting frame, with the steel strip wrapped around the guide rollers to guide and change the wrapping path of the steel strip; two sets of connecting frames, rotatably connected to both sides of the mounting frame respectively, each set of connecting frames consisting of a first sub-frame and a second sub-frame in sliding engagement; a mounting shaft, rotatably connected between the ends of the two sets of connecting frames; a control roller, rotatably connected to the mounting shaft, with the steel strip wrapped around the control roller, its displacement adjustable to adjust the actual length of the steel strip in the inner groove; and a control component, located on the mounting frame, used to drive the displacement of the mounting shaft.

[0009] Optionally, the control component includes: at least two sets of mating parts, evenly distributed within the mounting frame; and a control arm, slidably mounted on the mounting frame, the displacement of which drives the mounting shaft to move, the number and position of the arm ends corresponding to each set of mating parts. Each set of mating components includes: a guide rod, fixedly connected within the mounting frame; two wedge-shaped blocks, horizontally arranged side-by-side, slidably connected to both ends of the guide rod, with their wedge-shaped surfaces facing each other, and the control arm's two ends respectively contacting the wedge-shaped surfaces of the two wedge-shaped blocks; a return spring, sleeved on the guide rod, one end fixed to the guide rod and the other end fixed to the wedge-shaped block; two locking blocks, vertically arranged side-by-side, slidably connected within the mounting frame, with two locking heads on the side facing the wedge-shaped blocks; each wedge-shaped block has a locking groove, the shape and position of which correspond to the locking head, and the locking head and locking groove are inserted and engaged to lock the horizontal movement of the wedge-shaped block; and a sloping pressure surface, located on the contact surface between each locking block and the wedge-shaped block, used to guide the locking head into the locking groove. The control assembly further includes: a first control screw, rotatably connected within the mounting bracket, with a number of threaded segments distributed along its axial direction matching the number of mating subgroups. Each group of threaded segments consists of two threaded segments with opposite directions of rotation, and engages with the threads of two locking blocks in each group of mating subgroups, thereby converting the rotational motion of the first control screw into synchronous, opposite linear motion of the two locking blocks in the same group; and a drive unit, fixedly connected within the mounting bracket, with its output end coaxially fixed with the first control screw.

[0010] Optionally, the control component further includes a detection module, located inside the control roller, for real-time monitoring of the steel strip tension and connected to the drive component via electrical signals.

[0011] Optionally, the device further includes a ball bearing rotatably connected to the end of the control arm to reduce friction between the control arm and the wedge block.

[0012] Optionally, the device further includes: an adjustment structure disposed between the control arm and the mounting shaft, used to compensate for changes in the length of the steel strip and adjust the initial positions of the mounting shaft and the control roller. The adjustment structure includes: a bracket rotatably connected to the mounting shaft, with the control arm slidingly engaged with the bracket, and having symmetrically arranged inclined surfaces on it; two adjustment blocks slidably disposed between the control arm and the mounting shaft, respectively in direct contact with the two inclined surfaces of the bracket; and a second control screw rotatably connected inside the control arm, having threads with opposite directions of rotation, with the two adjustment blocks respectively engaging with the two sections of the threads.

[0013] The present invention has the following advantages: By using a pressure-dividing structure to adapt to the expansion force of the battery cell in different directions, the present invention achieves effective decomposition and transmission of asymmetric loads, avoiding premature fatigue or even damage to key parts due to stress concentration, thereby improving the adaptability and stability of the present invention under random expansion force of the battery cell; by adopting an integrated molding design between the transmission plate, the central frame and the side pressure plate, the continuity and rigidity of the force transmission path are enhanced, ensuring coordinated deformation and rapid response during the stress process, thus improving the pressure-dividing stability of the present invention; the rotatable side pressure plate and the sliding connection of the connecting end strip enable the pressure-dividing structure to have a certain displacement compensation capability, which can maintain effective contact and continuous pressure division during the continuous expansion of the battery cell, extending its service life.

[0014] This invention uses a release structure to pre-set a slack section of the steel strip and release it controllably under extreme tension, effectively preventing the steel strip from breaking due to sudden overload, thus achieving structural protection of the steel strip and extending its service life. In addition, the steel strip can still provide restraint force during the process, buying time for a safe response. In other words, the release structure gives the battery module adaptability to extreme conditions, avoids the loss of overall restraint function due to steel strip breakage, and enhances the reliability and safety redundancy of the battery module.

[0015] This invention effectively compensates for length changes in the steel strip caused by plastic deformation or long-term use by finely adjusting the initial position of the mounting shaft, thereby restoring the preload of the structure and ensuring the stability of the constraint effect; it also reduces the replacement frequency caused by non-destructive length changes, improving the efficiency and economy of the steel strip. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a structural separation diagram showing the positions of the outer frame, end plate, and steel strip in this invention.

[0018] Figure 3 This is a schematic diagram showing the positional relationship between the pressure dividing structure and the end plate in this invention.

[0019] Figure 4 This is a top view of the overall structure of the pressure-dividing structure in the present invention when it is in a partially separated state.

[0020] Figure 5 This is a schematic diagram showing the location distribution of the release structure in this invention.

[0021] Figure 6 This is a schematic diagram of the connection structure of the release structure in this invention.

[0022] Figure 7 This is a cross-sectional view of the connection structure of the control component in this invention.

[0023] Figure 8 This is a structural separation diagram of the control component in this invention.

[0024] Figure 9 This is a cross-sectional view of the connection structure of the adjustment structure in this invention.

[0025] Figure 10 This is a diagram showing the separation of the connection structure of the adjustment structure in this invention.

[0026] The components in the attached diagram are labeled as follows: 01: Battery cell, 11: Outer frame, 1101: Mounting screw, 12: End plate, 1201: Longitudinal reinforcing rib, 1202: Transverse reinforcing rib, 1203: Embedded groove, 13: Steel strip, 21: Fixing plate, 22: Center frame, 23: Side pressure plate, 24: Transfer plate, 25: Connecting end strip, 31: Mounting frame, 32: Guide roller, 33: Connecting frame, 3301: First sub-frame, 330 2: Second subframe, 34: Mounting shaft, 35: Control roller, 41: Control arm, 4101: Ball bearing, 42: Guide rod, 43: Wedge block, 4301: Locking groove, 44: Return spring, 45: Locking block, 4501: Lock head, 4502: Inclined pressure surface, 46: First control screw, 47: Drive component, 48: Detection module, 51: Bracket, 5101: Contact surface, 52: Adjusting block, 53: Second control screw. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Example: A module end plate resistant to battery swelling force, such as Figures 1-2 As shown, it includes: an outer frame 11; end plates 12, which are fixedly installed inside the outer frame 11, with the battery cell 01 assembled between the two sets of end plates 12; the main body of the end plate 12 consists of longitudinal reinforcing ribs 1201 on both sides and two transverse reinforcing ribs 1202 fixed between them, each reinforcing rib adopts a U-shaped groove structure, and the transverse reinforcing ribs 1202 are perpendicularly connected to the longitudinal reinforcing ribs 1201. The connection points between the two are welded and fixed using resistance welding, laser welding, CO2 welding or argon arc welding, etc., to effectively improve the overall rigidity and bending resistance of the end plate 12; mounting screws 1101 are threaded between the two sides of the outer frame 11 and the end plates 12 to ensure the stable assembly of the outer frame 11 and the end plates 12 and form a rigid frame, so that the end plates 12 can stably provide uniform preload force; two sets of steel strips 13 are wrapped around the outer side between the two end plates 12, and after tensioning, they can evenly transmit pressure to the battery cell 01, thereby applying radial constraint to the battery cell 01 and suppressing the expansion force of the battery cell 01.

[0029] like Figure 1 , Figure 3 and Figure 4As shown, the device also includes: two pressure-compressing structures, respectively assembled between the two end plates 12 and the corresponding battery cells 01, used to coordinate the end plates 12 and the steel strip 13 to achieve uniform distribution and stable support of the expansion force of the battery cells 01. Each pressure-compressing structure includes: a fixed plate 21, fixedly installed on the side of the outer frame 11 facing the battery cell 01; a central frame 22, fixedly installed in the central area of ​​the fixed plate 21; and side pressure plates 23, respectively rotatably installed on both sides of the central frame 22, with their plate surfaces flush with the frame surface of the central frame 22 and maintaining a distance from the fixed plate 21. Parallel; the transfer plate 24 is fixedly installed between the side pressure plate 23 and the center frame 22, with one end connected to the center frame 22 and the other end connected to the side end of the side pressure plate 23 away from the center frame 22, realizing the directional transmission of force. The transfer plate 24, the center frame 22 and the side pressure plate 23 adopt an integrated molding structure; the connecting end strip 25 is slidably installed between the side pressure plate 23 and the fixed plate 21, with one end sliding with the side end of the side pressure plate 23 away from the center frame 22 and the other end sliding with the edge of the corresponding side of the fixed plate 21, forming a movable connection.

[0030] When cell 01 undergoes uneven expansion in random directions, the expansion force will act on different positions of the pressure-distributing structure. If the expansion force acts on the central frame 22 area, the force will naturally be evenly transmitted to the steel strips 13 on both sides, achieving stable pressure distribution. If the expansion force acts eccentrically on the side pressure plate 23, the side pressure plate 23 will undergo adaptive rotation and squeeze the transfer plate 24. The transfer plate 24 decomposes the force into multiple directions through its structural stiffness, with the main component being guided to the central frame 22, and then the central frame 22 achieves secondary force distribution. Therefore, the pressure-distributing structure can transform local concentrated loads into overall uniform force, effectively avoiding stress concentration that could lead to fatigue or even damage to the steel strip 13 material.

[0031] This device utilizes a pressure-dividing structure to adapt to the expansion force of the battery cell 01 in different directions, effectively decomposing and transmitting asymmetrical loads. This prevents premature fatigue or even damage to critical components due to stress concentration, thereby improving the adaptability and stability of the device under random expansion forces of the battery cell 01. The integrated design of the transmission plate 24, the central frame 22, and the side pressure plate 23 enhances the continuity and rigidity of the force transmission path, ensuring coordinated deformation and rapid response during stress, thus improving the pressure-dividing stability of the device. The rotatable side pressure plate 23 and the sliding connection of the connecting end strip 25 give the pressure-dividing structure a certain displacement compensation capability, enabling it to maintain effective contact and continuous pressure division during the continuous expansion of the battery cell 01, extending its service life.

[0032] like Figure 1 , Figure 5 and Figure 6As shown, the transverse reinforcing rib 1202 has an embedded groove 1203 in the center, which is respectively located on the two sides of the two steel strips 13, for a total of four transverse reinforcing ribs 1202. The device also includes: a release structure, which is assembled in each embedded groove 1203 to release the tension of the steel strip 13 and prevent it from breaking. Each set of release structures includes: a mounting frame 31, which is fixedly installed in the embedded groove 1203; guide rollers 32, which are rotatably installed on both sides of the mounting frame 31, and the steel strip 13 is wound around the guide rollers 32 to guide and change the winding path of the steel strip 13; and two sets of connecting frames 33, which are rotatably installed. Mounted on both sides of the mounting frame 31, each set of connecting frames 33 is composed of a first sub-frame 3301 and a second sub-frame 3302 in sliding engagement to achieve overall telescopic extension and retraction of the connecting frame 33; the mounting shaft 34 is rotatably mounted between the ends of the two sets of connecting frames 33, and its displacement will cause the connecting frame 33 to telescopically extend and retract accordingly; the control roller 35 is rotatably mounted on the mounting shaft 34, and the steel strip 13 is wrapped around the control roller 35, the displacement of which can adjust the actual length of the steel strip 13 in the inner groove 1203; the control component is located on the mounting frame 31 and is used to automatically trigger the release structure when the tension overload of the steel strip 13 is detected.

[0033] In the initial state, the control component moves the control roller 35 into the inner groove 1203, and the connecting frame 33 extends, so that a section of the steel strip 13 is pre-stored in the inner groove 1203. At this time, the steel strip 13 is in the state of binding the battery cell 01. When the expansion force of the battery cell 01 increases to the limit of the steel strip 13, the control component is activated, driving the mounting shaft 34 to move outward, and the connecting frame 33 retracts accordingly to release the pre-stored length of the steel strip 13, so that the overall tension of the steel strip 13 can be relieved. Although it cannot continue to maintain the initial binding state, it can still maintain the continuous constraint on the battery cell 01, that is, extend the constraint time on the expansion of the battery cell 01, avoid the failure of the constraint function caused by the sudden breakage of the steel strip 13 due to overload, thereby improving the safety margin of the battery module under extreme working conditions.

[0034] like Figure 7 and Figure 8As shown, the control assembly includes: five sets of mating sub-parts, evenly distributed within the mounting frame 31, to achieve smooth control of the mounting shaft 34; a control arm 41, slidably mounted on the mounting frame 31, whose displacement drives the mounting shaft 34 to move, and has five arm ends, each corresponding to one of the five sets of mating sub-parts; each set of mating sub-parts includes: a guide rod 42, fixedly mounted within the mounting frame 31; two wedge blocks 43, arranged horizontally side by side, slidably mounted on both ends of the guide rod 42, with their wedge-shaped surfaces facing each other, and the arm ends of the control arm 41 respectively contacting the wedge-shaped surfaces of the two wedge blocks 43; and ball bearings 4101, rotatably mounted on the arm ends of the control arm 41, used to reduce the contact between the control arm 41 and the wedge blocks. Friction between blocks 43; a return spring 44, sleeved on the guide rod 42, with one end fixed to the guide rod 42 and the other end fixed to the wedge block 43; two locking blocks 45, arranged vertically side by side, slidably installed in the mounting bracket 31, with two locking heads 4501 on the side facing the wedge block 43; each wedge block 43 is provided with a locking groove 4301, the shape and position of which correspond to the locking head 4501, and the locking block 45 locks the horizontal movement of the wedge block 43 by the insertion and cooperation of the locking head 4501 and the locking groove 4301; an inclined pressure surface 4502 is provided on the contact surface between each locking block 45 and the wedge block 43, used to guide the locking head 4501 to smoothly insert into the locking groove 4301.

[0035] The control assembly also includes: a first control screw 46, rotatably mounted in the mounting bracket 31, with five sets of threaded segments distributed along its axial direction. Each set of threaded segments consists of two threads with opposite directions of rotation, and respectively engages with two locking blocks 45 in each set of mating parts, thereby converting the rotational motion of the first control screw 46 into synchronous reverse linear motion of the two locking blocks 45 in the same set; a drive component 47, fixedly mounted in the mounting bracket 31, with its output end coaxially fixed with the first control screw 46; and a detection module 48, assembled in the control roller 35, used to monitor the tension of the steel strip 13 in real time, and electrically connected to the drive component 47.

[0036] When the detection module 48 detects that the tension of the steel strip 13 is close to the limit, it sends a signal to the drive component 47. The drive component 47 drives the first control screw 46 to rotate, causing two locking blocks 45 in the five sets of mating parts to separate in the vertical direction, thereby disengaging from the wedge block 43 and releasing the lock on the wedge block 43. After unlocking, under the action of the return spring 44, the two wedge blocks 43 slide to the left and right sides along the guide rod 42, and their wedge surfaces move away from each other. Then, the contact position between the arm end of the control arm 41 and the wedge block 43 moves forward. That is, the tensioned steel strip 13 can push the mounting shaft 34 forward until the arm end of the control arm 41 abuts against the wedge surface on the wedge block 43 again and reaches force balance with the return spring 44, completing the release of the pre-stored steel strip 13 and relieving the tension of the steel strip 13. This process will realize the soft release of the constraint force of the steel strip 13 and prevent the steel strip 13 from breaking suddenly.

[0037] After replacing the battery cell 01 and re-tensioning the steel strip 13, the mounting shaft 34 will move backward, and the reset spring 44 will restore the two wedge blocks 43 to close again. Subsequently, the first control screw 46 is rotated in the opposite direction using the drive component 47, which drives the two locking blocks 45 to move closer to each other. The inclined pressure surface 4502 guides the lock head 4501 to slide smoothly into the locking groove 4301 of the wedge block 43, and the locking is completed again, so that the steel strip 13 is kept in the initial tension state.

[0038] This device uses a release structure to pre-set a slack section for the steel strip 13 and release it controllably under extreme tension, effectively preventing the steel strip 13 from breaking due to sudden overload, thus achieving structural protection of the steel strip 13 and extending its service life. During this process, the steel strip 13 can still provide restraint force, buying time for a safe response. In other words, the release structure gives the battery module adaptability to extreme conditions, preventing the loss of overall restraint function due to the breakage of the steel strip 13, and enhancing the reliability and safety redundancy of the battery module.

[0039] This device monitors the tension of the steel strip 13 in real time through the detection module 48, and automatically triggers the release mechanism when the preset limit is reached, realizing immediate processing of the steel strip 13. This control process is a controllable soft release, which can maintain the basic constraint function of the steel strip 13 on the battery cell 01, and buy time for structural maintenance or safety response. In this device, the mechanical structure of the release and reset process is stable and reliable, and the unlocking and relocking operation will facilitate the rapid restoration of function after maintenance, improving the maintainability and economy of this device.

[0040] like Figure 9 and Figure 10 As shown, the device also includes: an adjustment structure, located between the control arm 41 and the mounting shaft 34, used to compensate for changes in the length of the steel strip 13 and adjust the initial positions of the mounting shaft 34 and the control roller 35. The adjustment structure includes: a bracket 51, rotatably mounted on the mounting shaft 34, with the control arm 41 and the bracket 51 in sliding engagement, and symmetrically arranged inclined surfaces 5101 on the bracket 51; two adjustment blocks 52, slidably located between the control arm 41 and the mounting shaft 34, respectively in direct contact with the two inclined surfaces 5101 of the bracket 51; and a second control screw 53, rotatably mounted inside the control arm 41, with threads of opposite directions on the screw, and the two adjustment blocks 52 respectively engaging with these two threads.

[0041] During repeated use, if the steel strip 13 undergoes a slight plastic elongation due to the ultimate tension, this is a normal and non-abnormal loss. It can be compensated by rotating the second control screw 53 to drive the two adjusting blocks 52 to move away from each other. The adjusting blocks 52 push the inclined surface 5101 of the bracket 51, causing the bracket 51 to move the mounting shaft 34 and the control roller 35 in the tensioning direction, thereby compensating for the elongation of the steel strip 13, restoring its normal tension force on the battery cell 01, and ensuring the continuous and effective operation of the structure.

[0042] This device effectively compensates for the length changes of the steel strip 13 caused by plastic deformation or long-term use by finely adjusting the initial position of the mounting shaft 34, so as to restore the preload of the device structure, ensure the stability of the constraint effect, reduce the replacement frequency caused by non-destructive length changes, and improve the efficiency and economy of the steel strip 13.

[0043] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A module end plate resistant to battery swelling force, comprising: The device comprises an outer frame (11), end plates (12), and steel strips (13). The main body of the end plate (12) is composed of longitudinal reinforcing ribs (1201) on both sides and at least two transverse reinforcing ribs (1202) fixed therebetween. The device is characterized in that it further comprises two pressure-reducing structures, which are respectively disposed between the end plates (12) on both sides and the corresponding battery cells (01), for coordinating the end plates (12) and the steel strips (13) to achieve uniform dispersion and support of the expansion force of the battery cells (01). Each pressure-reducing structure includes: a fixed plate (21), fixedly connected to the side of the outer frame (11) facing the cell (01); a central frame (22), fixedly connected to the central area of ​​the fixed plate (21); side pressure plates (23), rotatably connected to both sides of the central frame (22), with their surfaces flush with the central frame (22) and parallel to the fixed plate (21); a transmission plate (24), fixedly connected between the side pressure plates (23) and the central frame (22), with one end connected to the central frame (22) and the other end connected to the side end of the side pressure plates (23) away from the central frame (22), to achieve directional force transmission; and a connecting strip (25), slidably connected between the side pressure plates (23) and the fixed plate (21), with one end sliding to the side end of the side pressure plates (23) away from the central frame (22) and the other end sliding to the edge of the corresponding side of the fixed plate (21), forming a movable connection.

2. The module end plate for resisting battery swelling force as described in claim 1, characterized in that: The transfer plate (24), the center frame (22) and the side pressure plate (23) adopt an integrated molding structure.

3. The module end plate for resisting battery swelling force as described in claim 2, characterized in that: Each reinforcing rib adopts a U-shaped groove structure, with the horizontal reinforcing rib (1202) perpendicularly connected to the longitudinal reinforcing rib (1201), and the connection node between the two is fixed by welding.

4. The module end plate for resisting battery swelling force as described in claim 3, characterized in that: The transverse reinforcing rib (1202) has an embedded groove (1203) in the center, which is respectively provided on the transverse reinforcing rib (1202) at both ends of each steel strip (13). The device also includes a release structure, which is provided in each embedded groove (1203) for releasing the tension of the steel strip (13). Each set of release structures includes: a mounting frame (31), fixedly connected to the inner groove (1203); a guide roller (32), rotatably connected to both sides of the mounting frame (31), with the steel strip (13) wrapped around the guide roller (32) to guide and change the wrapping path of the steel strip (13); two sets of connecting frames (33), rotatably connected to both sides of the mounting frame (31), each set of connecting frames (33) being formed by the sliding fit of the first sub-frame (3301) and the second sub-frame (3302); a mounting shaft (34), rotatably connected between the ends of the two sets of connecting frames (33); a control roller (35), rotatably connected to the mounting shaft (34), with the steel strip (13) wrapped around the control roller (35), the displacement of which can adjust the actual length of the steel strip (13) in the inner groove (1203); and a control component, located on the mounting frame (31), used to drive the displacement of the mounting shaft (34).

5. A module end plate for resisting battery swelling force as described in claim 4, characterized in that: The control component includes: at least two sets of mating parts, evenly distributed in the mounting frame (31); and a control arm (41), slidably mounted on the mounting frame (31), whose displacement drives the mounting shaft (34) to move, the number and position of its arm end corresponding to each set of mating parts; Each set of mating parts includes: a guide rod (42), fixedly connected to the mounting bracket (31); two wedge blocks (43), arranged horizontally side by side, slidably connected to both ends of the guide rod (42), with their wedge surfaces facing each other, and the control arm (41) having its arm ends in contact with the wedge surfaces of the two wedge blocks (43) on both sides respectively; a return spring (44), sleeved on the guide rod (42), with one end fixed to the guide rod (42) and the other end fixed to the wedge block (43); and two locking blocks (45), arranged vertically side by side, slidably connected to the guide rod (42) on both ends. The device is dynamically connected to the mounting bracket (31), and has two locking heads (4501) on the side facing the wedge block (43). Each wedge block (43) is provided with a locking groove (4301), the shape and position of which correspond to the locking head (4501). The locking head (4501) and the locking groove (4301) are inserted and engaged to lock the horizontal movement of the wedge block (43). The inclined pressing surface (4502) is provided on the contact surface between each locking block (45) and the wedge block (43) to guide the locking head (4501) to insert into the locking groove (4301). The control assembly further includes: a first control screw (46), which is rotatably connected to the mounting bracket (31) and has a number of threaded segments distributed along its axial direction that are consistent with the number of mating sub-groups. Each group of threaded segments consists of two threaded segments with opposite directions of rotation and respectively engages with the two locking blocks (45) in each group of mating sub-groups. This is used to convert the rotational motion of the first control screw (46) into the synchronous reverse linear motion of the two locking blocks (45) in the same group; and a drive member (47), which is fixedly connected to the mounting bracket (31) and whose output end is coaxially fixed with the first control screw (46).

6. The module end plate for resisting battery swelling force as described in claim 5, characterized in that: The control component further includes a detection module (48), located inside the control roller (35), for real-time monitoring of the tension of the steel strip (13), and connected to the drive component (47) by electrical signal.

7. A module end plate for resisting battery swelling force as described in claim 6, characterized in that: The device further includes a ball bearing (4101) rotatably connected to the end of the control arm (41) to reduce friction between the control arm (41) and the wedge block (43).

8. A module end plate for resisting battery swelling force as described in claim 7, characterized in that: The device further includes: an adjustment structure, located between the control arm (41) and the mounting shaft (34), used to compensate for changes in the length of the steel strip (13) and adjust the initial position of the mounting shaft (34) and the control roller (35). The adjustment structure includes: a bracket (51), rotatably connected to the mounting shaft (34), with the control arm (41) and the bracket (51) in sliding engagement, and symmetrically arranged inclined surfaces (5101) on it; two adjustment blocks (52), slidably located between the control arm (41) and the mounting shaft (34), respectively in direct contact with the two inclined surfaces (5101) of the bracket (51); and a second control screw (53), rotatably connected inside the control arm (41), with threads of opposite directions on it, and the two adjustment blocks (52) respectively engaging with the two sections of the threads.

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