AGM storage battery pole group tight assembly structure

Abstract

The application provides an AGM battery pole group tight assembly structure and belongs to the technical field of lead-acid batteries. The AGM battery pole group tight assembly structure comprises two side pressing plates, which are pressed between a pole group and a battery tank, are used for controlling pole group assembly pressure and limiting pole group transverse displacement, and simultaneously avoid damaging side pole plates during the process of assembling the pole group into the tank. Upper ends of the two side pressing plates form a plurality of limiting structures, the limiting structures comprise horizontal limiting plates and horizontal pressing plates, are relatively inserted and assembled, and are used for preventing longitudinal lengthening of pole plates of the pole group and limiting longitudinal displacement of the pole group. The AGM battery pole group tight assembly structure improves the consistency of pole group assembly pressure and the consistency of pole group vibration resistance. In addition, the two side pressing plates are independently arranged, can be adjusted in height and length of the horizontal pressing plates according to thicknesses of pole groups of different models and structures of battery tanks, can meet the requirements of pole group assembly and assembly pressure, have strong universality, and can be applied to pole groups of different models.

Description

Technical Field

[0001] This invention belongs to the field of lead-acid battery technology, and more specifically, relates to a tight assembly structure for AGM battery electrode groups. Background Technology

[0002] AGM lead-acid batteries consist of electrode groups composed of highly elastic glass fiber felt separators and positive and negative plates. Sulfuric acid electrolyte is adsorbed into the active materials of the positive and negative plates and within the pores of the glass fiber felt separators. To improve the uniformity of electrode group assembly pressure, prevent plate growth, enhance the vibration resistance of the electrode groups, and reduce damage to the edge plates during electrode group assembly into the slot, various fixing measures have been implemented to improve the overall performance of the battery and to prevent damage to the edge plates during slot assembly.

[0003] In existing AGM battery technology, the electrode group is typically pressed directly against the battery case wall. While this achieves the required tight assembly pressure and mitigates lateral vibration to some extent, the battery case itself has a certain draft angle (smaller bottom and larger top). This results in inconsistent assembly pressure between the upper and lower parts of the electrode group within the case. Consequently, the amount of sulfuric acid electrolyte adsorbed in the active materials of the positive and negative plates and the pores of the fiberglass mat separator is uneven, with more electrolyte at the top and less at the bottom. This leads to inconsistent electrochemical reactions within the electrode group and poor lateral vibration resistance between the upper and lower parts. Furthermore, existing AGM battery electrode group fixing methods cannot prevent the plates from growing upwards, eventually causing short circuits between the positive and negative electrodes. Furthermore, the existing AGM battery electrode group fixing method, compared to the relatively stringent electrode group tight assembly pressure of AGM batteries (i.e., different electrode groups use the same assembly pressure, generally within the range of 25±0.5 kPa), requires the design of different positive and negative plates and fiberglass mat separators to produce batteries of different capacities from the same battery case in order to meet the requirements of different battery capacities. Therefore, the electrode group structure design has poor versatility. In addition, the existing AGM battery manufacturing technology cannot completely avoid the problem of side plate damage during the electrode group assembly into the case. Summary of the Invention

[0004] The purpose of this invention is to provide an AGM battery electrode group tight assembly structure that can fix the electrode group in different directions, improve the consistency of electrode group tight assembly pressure and vibration resistance, prevent electrode plate growth, avoid damage to the side electrode plates during electrode group assembly into the slot, and has strong versatility, which can be used for different types of electrode groups.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: providing an AGM battery electrode group tight assembly structure, including two side pressure plates respectively disposed on both sides of the electrode group, the side pressure plates pressing between the electrode group and the battery case to limit the lateral displacement of the electrode group, the outer side of the side pressure plates being adapted to the slope of the battery case so that the inner sides of the two side pressure plates form a longitudinal pressing plane;

[0006] Multiple limiting structures are formed at the upper ends of the two side pressure plates, and a clearance space is formed between adjacent limiting structures to allow the busbar to be welded and installed on the electrode group. The limiting structure includes a horizontal limiting plate and a horizontal pressure plate arranged opposite to each other. The horizontal limiting plate and the horizontal pressure plate are inserted into each other to prevent the electrode plates of the electrode group from growing longitudinally and to limit the longitudinal displacement of the electrode group.

[0007] In one possible implementation, the plurality of limiting structures include two outer limiting structures located at both ends and a central limiting structure located in the middle, wherein the width of the central limiting structure is smaller than the width of the outer limiting structures, and the clearance space is formed between the outer limiting structures and the central limiting structure.

[0008] In one possible implementation, the limiting structure includes two sets of horizontal limiting plates and horizontal pressure plates, with each side pressure plate of the same limiting structure having one horizontal limiting plate and one horizontal pressure plate.

[0009] In one possible implementation, the front end of the horizontal pressure plate is inserted below the opposing horizontal limiting plate, and the upper end face of the horizontal pressure plate abuts against the lower end face of the horizontal limiting plate.

[0010] In one possible implementation, the upper surface of the horizontal pressure plate is provided with a plurality of first transverse reinforcing ribs, the length of the first transverse reinforcing ribs being less than the length of the horizontal pressure plate, so as to form a clearance notch at the front end of the horizontal pressure plate for the horizontal pressure plate to insert below the horizontal limiting plate. The upper surface of the horizontal limiting plate is provided with a plurality of second transverse reinforcing ribs, the first transverse reinforcing ribs and the second transverse reinforcing ribs being arranged opposite to each other and their upper surfaces being at the same height.

[0011] In one possible implementation, the horizontal pressure plate is provided with a plurality of liquid supply through holes, and the plurality of liquid supply through holes are all disposed between adjacent first transverse reinforcing ribs.

[0012] In one possible implementation, the outer side of the side pressure plate is provided with multiple longitudinal reinforcing ribs, and the multiple longitudinal reinforcing ribs abut against the wall of the battery compartment.

[0013] In one possible implementation, the outer surfaces of the multiple longitudinal reinforcing ribs are inclined surfaces adapted to the wall of the battery compartment, and the inner surface of the side pressure plate in the pressed-in-the-compartment state forms the pressing plane.

[0014] The beneficial effects of the AGM battery electrode group tight assembly structure provided by this invention are as follows: Compared with the prior art, two side pressure plates are set on both sides of the electrode group, pressing it between the electrode group and the battery case. Multiple limiting structures are formed at the upper ends of the two side pressure plates, with horizontal pressure plates and horizontal limiting plates arranged opposite each other in the limiting structures. This AGM battery electrode group tight assembly structure not only ensures consistent tight assembly pressure between the upper and lower parts of the electrode group, thereby improving the consistency of acid absorption within the pores of the glass fiber separator in the electrode group, but also prevents the longitudinal growth of the electrode plates, preventing short circuits between the positive and negative plates. Simultaneously, it limits the lateral and longitudinal displacement of the electrode group within the battery case, ensuring stability and reducing vibration. Furthermore, the two side pressure plates are independently set, allowing for adjustments to the height of the longitudinal reinforcing ribs on the sides of the side pressure plates and the length of the horizontal pressure plates, based on the electrode group thickness and battery case structure of different models. This versatility makes it suitable for use with different electrode group models. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a tight assembly structure for an AGM battery electrode group provided in an embodiment of the present invention;

[0017] Figure 2 This is an assembly diagram of an AGM battery electrode group tight assembly structure provided in an embodiment of the present invention;

[0018] Figure 3 A top view of the side pressure plate provided in an embodiment of the present invention;

[0019] Figure 4 This is a front view of the side pressure plate provided in an embodiment of the present invention;

[0020] Figure 5 A side view of the side pressure plate provided in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a battery compartment provided in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of a pole group provided in an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Battery compartment; 2. Terminal group; 3. Side pressure plate; 4. Busbar; 5. Horizontal limiting plate; 6. Horizontal pressure plate; 7. Clearance space; 8. First transverse reinforcing rib; 9. Second transverse reinforcing rib; 10. Liquid supply through hole; 11. Longitudinal reinforcing rib; 12. Tank wall; 13. Terminal post. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] Please see Figure 1 and Figure 2 The present invention will now describe an AGM battery electrode group tight assembly structure. An AGM battery electrode group tight assembly structure includes two side pressure plates 3 respectively disposed on both sides of the electrode group 2. The side pressure plates 3 are pressed between the electrode group 2 and the battery compartment 1. The outer side of the side pressure plates 3 is adapted to the slope of the battery compartment 1 so that the inner sides of the two side pressure plates 3 form a longitudinal pressing plane, used to limit the tight assembly pressure and lateral displacement of the electrode group 2. Multiple limiting structures are formed at the upper ends of the two side pressure plates 3. A clearance space 7 is formed between adjacent limiting structures to allow the busbar 4 to be welded and installed on the electrode group 2. The limiting structure includes a horizontal limiting plate 5 and a horizontal pressure plate 6 disposed opposite to each other. The horizontal limiting plate 5 and the horizontal pressure plate 6 are inserted into each other to prevent the electrode plates of the electrode group 2 from growing longitudinally and to limit the longitudinal displacement of the electrode group 2.

[0027] This invention provides an AGM battery electrode group tight assembly structure. Compared with the prior art, two side pressure plates 3 are arranged on both sides of the electrode group 2, pressing it between the electrode group 2 and the battery case 1. Multiple limiting structures are formed at the upper ends of the two side pressure plates 3, and longitudinal pressing planes are formed on the inner surfaces of the two side pressure plates 3. Horizontal pressure plates 6 and horizontal limiting plates 5, which are arranged opposite to each other in the limiting structures, are interlocked. This AGM battery electrode group tight assembly structure not only ensures consistent tight assembly pressure between the upper and lower parts of the electrode group 2, thereby improving the consistency of acid absorption within the pores of the glass fiber separator in the electrode group, but also prevents the longitudinal growth of the electrode plates, preventing short circuits between the positive and negative electrode plates. Simultaneously, it restricts the lateral and longitudinal displacement of the electrode group 2 within the battery case 1, ensuring the stability of the electrode group 2 within the battery case 1 and reducing the vibration of the electrode group 2. In addition, the two side pressure plates 3 are set independently. Depending on the thickness of the pole group 2 and the structure of the battery compartment 1, the height of the side pressure plate 3 and the length of the horizontal pressure plate 6 can be adjusted at the same time to meet the requirements of tight assembly and assembly pressure of the pole group 2. It has strong versatility and can be used for different models of pole group 2.

[0028] In some embodiments, please refer to Figure 1 Three limiting structures are provided on the two side pressure plates 3, specifically including two outer limiting structures and one middle limiting structure. The horizontal limiting plates 5 and horizontal pressure plates 6 in the two outer limiting structures and the middle limiting structure are arranged in the same direction. In addition, the widths of the horizontal limiting plates 5 and horizontal pressure plates 6 in the two outer limiting structures are the same. The difference is that the widths of the horizontal limiting plates 5 and horizontal pressure plates 6 in the middle limiting structure are smaller than the widths of the horizontal limiting plates 5 and horizontal pressure plates 6 in the outer limiting structures, so as to match the positions of the positive busbar 4 and negative busbar 4 at the top of the electrode group 2, ensuring that the clearance space 7 formed between the outer limiting structure and the middle limiting structure can be adapted to the corresponding busbar 4 positions. When the two side pressure plates 3 are installed in the battery compartment 1 along with the electrode group 2, the positive busbar 4 and negative busbar 4 can be welded to the electrode group 2 through the corresponding clearance space 7, and the terminal post 13 is welded to its upper end face at the same time.

[0029] Specifically, the limiting structure includes two sets of horizontal limiting plates 5 and horizontal pressure plates 6. The same limiting structure has two horizontal limiting plates 5 and two horizontal pressure plates 6, with one horizontal limiting plate 5 and one horizontal pressure plate 6 sequentially installed on each side pressure plate 3. After the two side pressure plates 3 are installed on both sides of the pole group 2, the horizontal limiting plates 5 and horizontal pressure plates 6 on the two side pressure plates 3 in the same limiting structure are positioned opposite each other, with the front end of the horizontal pressure plate 6 inserted below the opposite horizontal limiting plate 5, and the upper end face of the horizontal pressure plate 6 abutting against the lower end face of the horizontal limiting plate 5.

[0030] For ease of description, the two side pressure plates 3 are defined as the first side pressure plate 3 and the second side pressure plate 3, respectively. When the two side pressure plates 3 are inserted into the slot along with the electrode group 2, the front ends of the three horizontal pressure plates 6 on the first side pressure plate 3 are inserted into the lower end faces of the three horizontal limiting plates 5 on the second side pressure plate 3; at the same time, the front ends of the three horizontal pressure plates 6 on the second side pressure plate 3 are inserted into the lower end faces of the three horizontal limiting plates 5 on the first side pressure plate 3. Neither the first side pressure plate 3 nor the second side pressure plate 3 can achieve relative longitudinal displacement, thereby preventing the electrode plates of the electrode group 2 from growing longitudinally and maintaining the longitudinal stability of the electrode group 2 within the battery slot 1.

[0031] In some embodiments, please refer to Figure 1 and Figure 3 The upper end face of the horizontal pressure plate 6 is provided with multiple first transverse reinforcing ribs 8. The length of the first transverse reinforcing ribs 8 is less than the length of the horizontal pressure plate 6, so as to form a clearance notch at the front end of the horizontal pressure plate 6 for the horizontal pressure plate 6 to be inserted into the horizontal limiting plate 5. The upper end face of the horizontal limiting plate 5 is provided with multiple second transverse reinforcing ribs 9. The first transverse reinforcing ribs 8 and the second transverse reinforcing ribs 9 are provided in a one-to-one correspondence and their upper end faces are at the same height.

[0032] In this embodiment, to improve the structural strength of the horizontal pressure plate 6 and the horizontal limiting plate 5, multiple first transverse reinforcing ribs 8 are integrally formed on the upper end face of the horizontal pressure plate 6, and multiple second transverse reinforcing ribs 9 are integrally formed on the upper end face of the horizontal limiting plate 5. The rear end of the first transverse reinforcing rib 8 is integrally formed on the side pressure plate 3. Since the length of the first transverse reinforcing rib 8 is less than the length of the horizontal pressure plate 6, a clearance notch is formed on the upper end face of the front end of the horizontal pressure plate 6 to ensure that the upper end face of the front end of the horizontal pressure plate 6 is not blocked by the first transverse reinforcing rib 8. When the horizontal pressure plate 6 is inserted below the horizontal limiting plate 5, the upper end face of the front end of the horizontal pressure plate 6 can still abut against the lower end face of the horizontal limiting plate 5 to form a longitudinal limit.

[0033] Furthermore, the number of first transverse reinforcing ribs 8 and second transverse reinforcing ribs 9 on the horizontal pressure plates 6 and horizontal limiting plates 5, which are respectively arranged on the two side pressure plates 3, is the same. Additionally, the upper surfaces of the first transverse reinforcing ribs 8 and second transverse reinforcing ribs 9 on the horizontal pressure plates 6 and horizontal limiting plates 5, which are respectively arranged on the opposite sides, are at the same height. When the opposing horizontal pressure plates 6 and horizontal limiting plates 5 are inserted into each other, the first transverse reinforcing ribs 8 and second transverse reinforcing ribs 9 correspond one-to-one, and their upper surfaces are at the same horizontal plane.

[0034] Please refer to Figure 3The horizontal pressure plate 6 has multiple liquid supply holes 10, which are located between adjacent first transverse reinforcing ribs 8. The number of liquid supply holes 10 between any two adjacent first transverse reinforcing ribs 8 is the same. The liquid supply holes 10 are located in the area between two adjacent first transverse reinforcing ribs 8. No liquid supply holes 10 are located in the area corresponding to the clearance notch of the horizontal pressure plate 6. That is, when the front end of the horizontal pressure plate 6 is inserted below the horizontal limiting plate 5, all the liquid supply holes 10 will not be blocked by the horizontal limiting plate 5, allowing the electrolyte to be injected into the electrode group 2 through the multiple liquid supply holes 10, so that the electrolyte can smoothly penetrate into the channels inside the electrode group 2.

[0035] Please refer to Figure 1 The side pressure plate 3 has multiple longitudinal reinforcing ribs 11 on its outer side. The longitudinal reinforcing ribs 11 are integrally formed with the side pressure plate 3. The multiple longitudinal reinforcing ribs 11 abut against the wall 12 of the battery compartment 1. While improving the structural strength of the side pressure plate 3 itself, it can provide more contact area between the side pressure plate 3 and the wall 12 of the battery compartment 1, so that the side pressure plate 3 can apply a stable clamping force to the electrode group 2 and ensure that the electrode group 2 remains stable in the battery compartment 1.

[0036] Preferably, the outer surfaces of the multiple longitudinal reinforcing ribs 11 are inclined surfaces adapted to the inner wall of the battery compartment 1. These inclined surfaces are adapted to the draft angle designed for the wall 12 of the battery compartment 1. When the side pressure plates 3, together with the electrode group 2, are inserted into the compartment, the plane formed by the inner surfaces of the two side pressure plates 3 can form a longitudinally arranged and parallel plane, applying a balanced clamping force to both sides of the electrode group 2. Simultaneously, the longitudinal plane formed by the inner surfaces of the two side pressure plates 3 can protect the side plates of the electrode group 2, effectively preventing damage and destruction to the side plates of the electrode group 2 by the wall 12 of the battery compartment 1 during the insertion of the electrode group 2 into the compartment.

[0037] To ensure a stable assembly relationship between this tight-fitting structure, pole group 2, and battery compartment 1, please refer to... Figures 4 to 7 The dimensional parameters and their relationships of this tight-fitting structure are as follows:

[0038] The height from the lower end face of the horizontal limiting plate 5 to the lower end face of the side pressure plate 3 is H1, the height from the lower end face of the horizontal pressure plate 6 to the lower end face of the side pressure plate 3 is H2, and the height from the lower end face of the horizontal pressure plate 6 to the lower end face of the horizontal limiting plate 5 is H3, where H1 = H2 + H3. This ensures that when the horizontal pressure plate 6 and the horizontal limiting plate 5 are inserted together, the upper end face of the horizontal pressure plate 6 can abut against the lower end face of the horizontal limiting plate 5, providing effective longitudinal limiting.

[0039] The multiple horizontal limiting plates 5 on the side pressure plate 3 have the same length, all H5, and the multiple horizontal pressure plates 6 on the side pressure plate 3 have the same height, all H6. The width of the horizontal limiting plate 5 on the outer limiting structure is the same as the width of the horizontal pressure plate 6 on the outer limiting structure, both W2, and the width of the horizontal limiting plate 5 on the middle limiting structure is the same as the width of the horizontal pressure plate 6 on the middle limiting structure, both W3, where W3 < W2. This ensures that a clearance space 7 is formed between the outer limiting structure and the middle limiting structure to accommodate the position of the busbar 4.

[0040] In the same limiting structure, a 2mm gap is left between adjacent horizontal pressure plates 6 and horizontal limiting plates 5 to ensure that after the horizontal pressure plates 6 and horizontal limiting plates 5 are inserted into each other, there can be a certain amount of displacement in the lateral direction, which is convenient for adjustment.

[0041] The thickness of the horizontal pressure plate 6 is H3. Its front end has a trapezoidal structure, which makes it easy to insert it under the horizontal limiting plate 5. It will not cause the corner of its edge to protrude from the edge of the horizontal limiting plate 5 due to lateral deviation, thus scratching the electrode plates of the electrode group 2.

[0042] The thickness of the side pressure plate 3 is gradually distributed with a larger thickness at the top and a smaller thickness at the bottom. The upper thickness is δ1 and the lower thickness is δ2, that is, δ1 > δ2. The overall formation of the side pressure plate 3 can match the draft angle inside the battery slot 1 while keeping the inner sides of the two side pressure plates 3 in a vertical and horizontal state.

[0043] The upper part of the wall 12 of the battery compartment 1 has a thickness of δ′, and the lower part has a thickness of δ”, where δ1+1 / 2δ′=δ2+1 / 2δ”. That is, after the two side pressure plates 3 and the electrode group 2 are inserted into the compartment, the two side pressure plates 3 located on both sides of the electrode group 2 are in parallel with the wall 12 of the battery compartment 1 which has a certain demolding slope. This ensures that the compression ratio of the upper and lower parts of the electrode group 2 is the same, that is, the tight assembly pressure is consistent.

[0044] After the two side pressure plates 3 and the electrode group 2 are pressed into the battery slot 1, the relationship between the length of the horizontal limiting plate 5 (H5), the length of the horizontal pressure plate 6 (H6), and the thickness δ of the pressed electrode group 2 is: δ=H6+2mm, and H5=8~10mm, that is, the insertion depth of the top of the horizontal pressure plate 6 below the horizontal limiting plate 5 is: 6~8mm.

[0045] After the two side pressure plates 3 and the electrode group 2 are pressed into the battery compartment 1, the height H2 from the lower end face of the horizontal pressure plate 6 to the lower end face of the side pressure plate 3 is the same as the height H′ of the electrode group 2, that is: H2=H′. The relationship between the total height H4 of the side pressure plate 3 and the welding height of the busbar 4 of the electrode group 2 (the height from the lower edge of the busbar 4 to the bottom of the electrode group 2) H” is: H4=H”-(2~3mm), that is, the upper end face of the side pressure plate 3 is 2~3mm away from the lower edge of the busbar 4 of the electrode group 2, so as to avoid the side pressure plate 3 and the busbar 4 from overlapping each other. At the same time, the side pressure plate 3 is prevented from moving upward under the obstruction of the busbar 4.

[0046] The relationship between the width W1 of the side pressure plate 3, the width W′ of the electrode group 2, and the width W of the battery compartment 1 is: W = W′, W1 = W - 2mm. That is, the width of the side pressure plate 3 is 2mm smaller than the width of the battery compartment 1 and the width of the electrode group 2, which facilitates the insertion of the electrode group 2 and the side pressure plate 3 into the compartment.

[0047] Furthermore, the tight-fitting structure provided by this invention is designed based on the structure of the electrode group 2 and the tight-fitting pressure requirements. That is, in the design of AGM lead-acid batteries, universal plates and separators can be designed to assemble battery electrode groups 2 of different capacities. In addition, side pressure plates 3 of different sizes can be designed to achieve consistent tight-fitting pressure for electrode groups 2 with different structures. This can reduce the replacement and adjustment of tooling molds in production, thereby improving production efficiency and ensuring the stability of production quality. It also reduces the complexity of calculating technical parameters in the design and improvement of AGM lead-acid batteries and simplifies the design calculation.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tight assembly structure for AGM battery terminals, characterized in that, It includes two side pressure plates (3) respectively disposed on both sides of the electrode group (2). The side pressure plates (3) are pressed between the electrode group (2) and the battery compartment (1) to limit the lateral displacement of the electrode group (2). The outer side of the side pressure plate (3) is adapted to the slope of the battery compartment (1) so that the inner side surfaces of the two side pressure plates (3) form a longitudinal pressing plane. Multiple limiting structures are formed at the upper ends of the two side pressure plates (3), and a clearance space (7) is formed between adjacent limiting structures to allow the busbar (4) to be welded and installed on the pole group (2). The limiting structure includes a horizontal limiting plate (5) and a horizontal pressure plate (6) arranged opposite to each other. The horizontal limiting plate (5) and the horizontal pressure plate (6) are inserted into each other to prevent the pole plate of the pole group (2) from growing longitudinally and to limit the longitudinal displacement of the pole group (2). The front end of the horizontal pressure plate (6) is inserted below the opposite horizontal limiting plate (5), and the upper end surface of the horizontal pressure plate (6) abuts against the lower end surface of the horizontal limiting plate (5). The side pressure plate (3) is provided with multiple longitudinal reinforcing ribs (11) on its outer side, and the multiple longitudinal reinforcing ribs (11) abut against the groove wall (12) of the battery compartment (1); the outer surfaces of the multiple longitudinal reinforcing ribs (11) are all inclined surfaces adapted to the groove wall (12) of the battery compartment (1), and the inner surface of the side pressure plate (3) in the pressed-in state forms the pressing plane. The longitudinal reinforcing ribs (11) can improve the structural strength of the side pressure plate (3) itself, and at the same time enable the side pressure plate (3) to apply a stable pressing force to the electrode group (2); By adjusting the height of the side pressure plate (3) and the length of the horizontal pressure plate (6), the requirements for tight assembly and assembly pressure of the pole group (2) can be met, making it suitable for use with different models of pole groups (2).

2. The AGM battery electrode group tight assembly structure as described in claim 1, characterized in that, The plurality of limiting structures include two outer limiting structures at both ends and a middle limiting structure in the middle, wherein the width of the middle limiting structure is smaller than the width of the outer limiting structures, and the clearance space (7) is formed between the outer limiting structures and the middle limiting structure.

3. The AGM battery electrode group tight assembly structure as described in claim 1, characterized in that, The limiting structure includes two sets of horizontal limiting plates (5) and horizontal pressure plates (6). The same limiting structure provides one horizontal limiting plate (5) and one horizontal pressure plate (6) on each side pressure plate (3).

4. The AGM battery electrode group tight assembly structure as described in claim 1, characterized in that, The upper surface of the horizontal pressure plate (6) is provided with a plurality of first transverse reinforcing ribs (8). The length of the first transverse reinforcing ribs (8) is less than the length of the horizontal pressure plate (6) to form a clearance notch at the front end of the horizontal pressure plate (6) for the horizontal pressure plate (6) to be inserted below the horizontal limiting plate (5). The upper surface of the horizontal limiting plate (5) is provided with a plurality of second transverse reinforcing ribs (9). The first transverse reinforcing ribs (8) and the second transverse reinforcing ribs (9) are arranged opposite to each other and their upper surfaces are at the same height.

5. The AGM battery electrode group tight assembly structure as described in claim 4, characterized in that, The horizontal pressure plate (6) is provided with a plurality of liquid supply through holes (10), and the plurality of liquid supply through holes (10) are all arranged between adjacent first transverse reinforcing ribs (8).

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