Direct connection type anti-overflow lead-acid battery

Abstract

The invention belongs to the technical field of batteries, and particularly relates to a direct connection type anti-overflow lead-acid battery which comprises a battery array, and the battery array comprises a plurality of square lead-acid batteries arranged in a row; the side plates are arranged on the two sides of the battery array respectively; the end plates are arranged on the front face and the back face of the battery array respectively, the two ends, in the width direction, of the end plates fixedly abut against side supports arranged at the two ends, in the length direction, of the side plates, and the battery array is restrained into a block through interconnection of the end plates and the side plates; the battery pack has the advantages that the side plates are fixedly connected with the end plates through the side supports on the two sides to form a rigid frame similar to a box, the battery array is tightly restrained in the rigid frame, the structure forms overall rigidity through mechanical connection, displacement of the battery array due to external force such as vibration and extrusion is avoided, and the reliability of the battery pack is improved. Therefore, the leakage of the internal electrolyte caused by the loosening of the structure is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a direct-connected anti-spill lead-acid battery. Background Art

[0002] In today's era of growing energy demand, battery technology, as a key area, continues to pursue higher performance, safety, and reliability. Direct-connect batteries, due to their advantages in simplifying battery connection structures and improving energy transmission efficiency, are widely used in various fields, including new energy vehicles and energy storage systems.

[0003] However, the existing direct-connected batteries still have many deficiencies in their structural design. For example, the fixation and connection methods of the battery array are not stable enough. When subjected to external forces such as vibration and impact, problems such as loose batteries and falling off of connection parts are likely to occur, which in turn affects the overall performance and service life of the battery and may even cause safety hazards. At the same time, the existing side plate and end plate structures perform poorly in terms of protecting and limiting the battery array. They cannot effectively limit the displacement of the battery array, and it is difficult to fully utilize the space for reasonable layout, resulting in low integration of the battery pack, affecting the overall design and performance optimization of the equipment. Furthermore, in terms of the expansion and installation and fixation of the battery pack, the existing technology also has problems such as inconvenient operation and insufficiently tight connection, which cannot meet the diverse usage scenarios and the ever-increasing market demands. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a direct-connected anti-overflow lead-acid battery to solve the problems of the prior art such as inconvenient operation, loose connection, and easy overflow.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A direct-connected, spill-proof lead-acid battery comprises a battery array comprising a plurality of square lead-acid batteries arranged in a row; a pair of side plates, respectively arranged on either side of the battery array; and a pair of end plates, respectively arranged on the front and back sides of the battery array, wherein both ends of the end plates in the width direction are fixed against side brackets arranged at both ends of the side plates in the length direction, and the interconnection of the end plates and the side plates constrains the battery array into a block.

[0007] Further, the side panel may include a single panel bent into a "U" shape having an open top to form a space therein.

[0008] Furthermore, the side plate may include concave surfaces on both sides of the bent plate, and may be provided with at least one bonding rib formed by bonding the concave surfaces facing each other along the length direction.

[0009] Furthermore, the top of the side plate may have a curved upper flange, and the curved upper flange contacts the top surface of the battery array.

[0010] Further, the side bracket may include a connecting groove into which a welding bolt protruding from the end plate is inserted, and the welding bolt and the connecting groove may be connected to each other by welding.

[0011] The welding bolts and the coupling grooves may be arranged in pairs up and down with the center of the battery array in the height direction as a reference.

[0012] Furthermore, the side bracket may be provided with coupling grooves on the left and right sides with respect to the center in the width direction of the side plate.

[0013] Thus, another battery array arranged along the width direction can share the side plate, and multiple battery arrays can be extended along the width direction by fixing the welding bolts on a pair of end plates arranged on the front surface and rear surface of the other battery array relative to the coupling groove of the side bracket.

[0014] Further, the end plate may include an end bracket fixed to the battery pack housing.

[0015] Further, the side brackets may include end brackets fixed to the battery box.

[0016] The end bracket may include a connector portion parallel to the width direction, and the coupling surface may include one or more connection holes formed therethrough.

[0017] Furthermore, the end bracket may include a reinforcing rib perpendicular to the connecting member portion.

[0018] The side panels (single plates bent into a U-shape) are fixedly connected to the end panels via side brackets on either side, forming a rigid "box" frame that tightly constrains the battery array. This structure, through mechanical connections (such as welding bolts and connecting slots), provides overall rigidity, preventing the battery array from shifting due to external forces such as vibration and compression, thereby preventing internal electrolyte leakage caused by structural loosening.

[0019] The end plates are fixed to the side brackets of the side plates at both ends in the width direction, forming a rigid support for the front and rear surfaces of the battery array, limiting the movement of the battery in the thickness direction (front and back direction), and further enhancing the sealing of the package.

[0020] Taking the center of the height direction of the battery array as the reference, fix them symmetrically up and down to ensure that the end plates and side plates are evenly stressed in the vertical direction (height direction), avoiding cracking of the connection parts due to local stress concentration, thereby preventing the generation of leakage paths.

[0021] This modular design allows for the use of shared side panels when expanding the battery array in the width direction. While expanding the structure, it also maintains the sealing between modules through a unified connection method (welded bolts) to avoid gaps caused by the expanded connection.

[0022] Used to accommodate the battery array, the curved structure itself has a certain elastic buffering effect, which can absorb external impact and reduce the damage of the battery shell caused by vibration and collision (such as cracking of the square lead-acid battery shell), thereby avoiding leakage of electrolyte from the battery body.

[0023] The flange is in close contact with the top surface of the battery array, forming a physical barrier on the top. This flange not only limits the vertical movement of the battery (top), but also reduces the top gap by closely fitting, preventing liquid or gas from leaking out from the top.

[0024] Bonding ribs are formed by bonding the concave surfaces facing each other along the length. This design increases the side panel's connection area (bonding ribs), improving its structural strength. At the same time, the bonding area can be filled with sealant (such as epoxy resin) to form an additional sealing layer, preventing liquid leakage from the side panel seams.

[0025] Located in the length direction of the side plate (the direction in which the battery array is arranged), a continuous sealing line can be formed along the long axis direction of the battery array, covering the side of the battery array and further blocking the leakage path.

[0026] The end plates are fixed to the battery pack housing (e.g., a battery box) through connectors and holes parallel to the width of the battery pack. This fixing method forms a rigid whole with the external housing, avoiding gaps caused by relative movement between the battery pack and the housing, thereby preventing the infiltration of external liquids (e.g., coolant) or the leakage of internal electrolyte.

[0027] Mechanical support of reinforcing ribs: The reinforcing ribs in the end brackets, which are perpendicular to the connectors, can enhance the deformation resistance of the connection between the end plate and the shell, prevent cracking around the connection holes due to vibration or installation stress, and further ensure the sealing.

[0028] The battery pack is also secured to the battery pack case through connection holes, forming dual fixing points between the side panels and the external casing. This design rigidly connects the left and right sides (side panels) and the front and rear surfaces (end panels) of the battery pack to the casing, forming a "four-sided" seal and minimizing gaps at all interfaces.

[0029] When multiple battery arrays are expanded along the width, shared side panels reduce the number of independent side panels, thereby reducing the connection interfaces between the side panels and the end panels (each independent module requires two pairs of side panels to connect to the end panels, and shared side panels can reduce the number of interfaces by half). The fewer interfaces, the lower the risk of leakage.

[0030] During expansion, adjacent end panels are fixed to the joint grooves of the shared side panels by welding bolts. This unified connection method ensures that the sealing standards of the new modules are consistent with those of the original structure, avoiding sealing failure due to differences in the expansion process.

[0031] The battery block disclosed herein has the aforementioned structure and is simple in construction, wherein the end plates are connected by side brackets provided on the side plates, thereby confining the front, rear, and sides of a plurality of prismatic lead-acid battery arrays within a single block. Therefore, by simplifying the battery block structure, it is possible to improve the space utilization of the battery pack and reduce production costs.

[0032] Because the side panels of the battery pack of the present invention are constructed from a single sheet of material bent into a U-shape, and these side panels replace the crossbeam structure found in conventional battery packs, they offer lightweight and high mechanical strength. Consequently, battery packs employing the battery pack of the present invention can achieve a further improvement in energy density within the same volume due to the elimination of the crossbeam structure.

[0033] Since the battery block of the present invention is a structure formed by connecting multiple battery blocks, adjacent battery arrays share a side plate, so the total number of side plates only needs to be one more than the number of battery arrays, thereby further improving the space efficiency of the battery pack equipped with the battery block of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a direct-connected anti-spill lead-acid battery of the present invention;

[0035] Figure 2 Schematic diagram of the exploded structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 1 ;

[0036] Figure 3 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 1 ;

[0037] Figure 4 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 2 ;

[0038] Figure 5 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 3 ;

[0039] Figure 6 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 4 ;

[0040] Figure 7 Schematic diagram of the exploded structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 2 ;

[0041] Figure 8 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 4 ;

[0042] Figure 9 A schematic diagram of the local structure of a direct-connected anti-spill lead-acid battery embodiment of the present invention Figure 5 ;

[0043] The reference numerals in the drawings of the specification include:

[0044] 10 battery blocks, 100 battery array, 110 square lead-acid batteries, 112 electrode terminals, 114 exhaust device, 200 side plate, 210 side bracket, 212 connecting groove, 220 adhesive rib, 222 concave surface, 230 upper flange, 300 end plate, 310 welding bolt, 320 concave surface, 330 upper flange, 400 end bracket, 410 connecting part, 412 connecting hole, 420 reinforcing rib, 500 battery module, 600 battery pack housing, 610 bottom plate, 620 side frame, 630 upper cover, 640 mounting part, 642 side mounting part, 644 center mounting part, W width direction, L length direction, H height direction. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments:

[0046] It should be noted that the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, a feature labeled "first" or "second" may explicitly or implicitly include at least one of these features.

[0048] In the description of the present invention, unless otherwise clearly specified and fixed, if the term "connection" appears to indicate the connection relationship between components, the term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] Example 1

[0050] like Figure 1-5 As shown, a direct-connected anti-spill lead-acid battery, the battery block 10 includes: a pair of side plates 200 and a pair of end plates 300, which are joined together to form a parallelepiped-shaped space; and a battery array 100, which is accommodated in the parallelepiped-shaped space.

[0051] A battery array 100 is a group of batteries consisting of multiple prismatic lead-acid batteries 110 arranged in a row. Each prismatic lead-acid battery 110 is a finished prismatic secondary battery capable of independent charging and discharging. In the diagram, twelve prismatic lead-acid batteries 110 are combined to form a battery array 100. All prismatic lead-acid batteries 110 are typically manufactured using the same specifications, and the overall shape of the prismatic lead-acid batteries 110 arranged in a row is a parallelepiped.

[0052] The illustrated prismatic lead-acid battery 110 corresponds to a unidirectional prismatic lead-acid battery 110 , with both positive and negative terminals 112 disposed on the top surface. A vent 114 is also provided between the pair of electrode terminals 112 . The vent 114 is a safety valve that, when excessive pressure is applied, ruptures to release pressure within the prismatic lead-acid battery 110 . The vent 114 may comprise, for example, a thin plate-shaped notched rupture disk made of a metal material. When pressure rises within the enclosed prismatic lead-acid battery 110 , the pressure causes the thin plate to stretch and deform, tearing the less-strength notched portion, thereby releasing pressure within the prismatic lead-acid battery 110 .

[0053] The electrode terminals 112 of the prismatic lead-acid batteries 110 in the battery array 100 can be arranged in a series of rows with the same polarity, or alternately arranged with opposite polarity to facilitate parallel or series electrical connection. In other words, arranging multiple prismatic lead-acid batteries 110 in a row does not necessarily mean that the polarity of the electrode terminals 112 is also aligned in a row.

[0054] A pair of side panels 200 are provided on either side of the battery array 100, and a pair of end panels 300 are provided on the front and rear surfaces of the battery array 100. The ends of the end panels 300 in the width direction (W) are fixed to side brackets 210 provided at the ends of the side panels 200 in the length direction (L). The connection between the end panels 300 and the side panels 200 constrains the battery array 100 into a single unit.

[0055] Figure 3 is a schematic diagram of the side panel 200, Figure 4 This is a cross-sectional view cut along line "AA" Figure 3 The side panel 200 shown in the figure is formed by bending a single plate into a U-shape with an open top to form a space inside. By bending the single plate into the U-shape with an open top, the side panel 200 is light in weight and has excellent mechanical strength.

[0056] like Figure 3 and Figure 4 As shown, the side panel 200 has concave surfaces 222 on both sides of the bent plate. The opposing concave surfaces 222 are connected to each other to form connecting ribs 220. At least one of these connecting ribs 220 is provided along the length direction L of the side panel 200. In the illustrated embodiment, three connecting ribs 220 are provided at both ends and the center of the side panel 200.

[0057] The U-shaped single plate has excellent durability and compressive strength in the length direction (L) due to its bent structure, but is relatively weak in the height direction (H). The connecting ribs 220 connect the concave surfaces 222 on both sides of the side plate 200 through welding, riveting, etc., thereby increasing the rigidity of the side plate 200 against forces in the height direction (H).

[0058] The side panels 200 utilize this "U"-shaped single-plate structure and interconnected concave surfaces 222, resulting in a lightweight yet mechanically strong design. Therefore, in the battery pack 10, the side panels 200 replace the conventional crossbeam structure of the battery pack. The simplified battery pack structure improves space utilization, further increasing energy density within the same volume and reducing production costs.

[0059] A curved upper flange 230 is formed on the top of the side panel 200. This upper flange 230 contacts the top surface of the battery array 100. When the battery block 10 is installed in the battery pack housing 600, the upper flange 230 generates a downward fixing force, pressing the battery array 100 toward the bottom. The installation structure of the battery block 10 in the battery pack housing 600 will be described in more detail later with reference to the accompanying drawings.

[0060] Figure 5 and Figure 2This is an enlarged view of the connection structure between the side plate 200 and the end plate 300. The side bracket 210 provided on the side plate 200 has a connection groove 212, and the welding bolt 310 extending from the end plate 300 is inserted into the connection groove 212. The welding bolt 310 and the connection groove 212 are connected by welding.

[0061] Weld bolts 310 are respectively provided on the pair of end plates 300 located on the front and rear sides of the battery array 100, providing connection points for the side brackets 210. The connection slots 212 engage with the weld bolts 310, thereby securing the assembly position of the side plates 200 and end plates 300. To ensure a stable and secure connection between the side plates 200 and end plates 300 and to provide a firm constraint on the battery array 100, the weld bolts 310 and connection slots 212 are positioned vertically relative to the center of the height direction H of the battery array 100.

[0062] refer to Figure 1-Figure 5 The end plate 300 includes an end bracket 400 fixed to the battery case 600. The side bracket 210 also includes an end bracket 400 fixed to the battery case 600.

[0063] The end bracket 400 provided on the end plate 300 and the side plate 200 has a connector portion 410 parallel to the width direction W, and one or more connection holes 412 are formed on the connector portion 410 of the end bracket 400. The connector portion 410 of the end bracket 400 is engaged with the mounting portion 640 provided on the battery pack housing 600 (see FIG. Figure 1 ). Figure 9 The battery block 10 is fixed to the pack case 600 by coupling or binding the end bracket 400 to the mounting portion 640 of the pack case 600 through the coupling hole 412 .

[0064] The end frame 400 may include a reinforcing rib 420, such as a right triangle perpendicular to the connector portion 410, to provide additional strength to withstand loads in the height direction H. One or more concave surfaces 320 similar to the concave surfaces 222 of the side panels 200 may be bent to enhance the rigidity of the end panel 300 itself, and an upper flange 330 may be provided on the top of the end panel 300 to stably fix the battery array 100.

[0065] Thus, the battery block 10 has a simple structure, wherein the end plates 300 are connected by side brackets 210 provided on the side plates 200, thereby constraining the front, rear, and sides of the battery array 100 composed of multiple prismatic lead-acid batteries 110 into a single block. Therefore, the simplified structure of the battery block 10 can improve the space utilization of the battery pack and reduce production costs.

[0066] Since the side panels 200 of the battery block 10 are formed by bending an integrally formed plate into a U-shape, and the side panels 200 of the battery block 10 replace the crossbeam structure of the conventional battery pack, the battery block 10 is light in weight and has good mechanical strength.

[0067] Example 2

[0068] The battery block 10 can be expanded to any number of battery arrays 100 along the width direction W through the side plates 200 and the side supports 210 .

[0069] Reference Figure 6 The side bracket 210 is provided with connecting grooves 212 on the left and right sides relative to the center of the side plate 200 in the width direction W. Thus, one side plate 200 can be connected to one end plate 300 on both sides in the width direction W thereof.

[0070] like Figure 7 As shown, another battery array 100 arranged along the width direction W shares a single side plate 200 located in the center, and multiple battery arrays 100 can be extended along the width direction W by welding bolts 310 provided on a pair of end plates 300 respectively provided on the front surface and the rear surface of the other battery array 100 and fixed on the coupling groove 212 on the side bracket 210.

[0071] Because the side brackets 210 are provided with coupling grooves 212 on both the left and right sides, an end plate 300 can be coupled to the left and right sides of a side plate 200. Adjacent battery arrays 100 share a single side plate 200. Therefore, in a structure where multiple battery blocks 10 are connected, the total number of side plates 200 only needs to be one more than the number of battery arrays 100. This further improves the space efficiency of a battery pack equipped with battery blocks 10.

[0072] Figure 8 and Figure 9 Schematic diagram of the fixing structure of the battery block 10 relative to the battery pack housing 600.

[0073] The battery pack housing 600, in which a plurality of battery blocks 10 are mounted, includes a bottom plate 610 constituting a bottom surface; side frames 620 forming walls along all sides of the bottom plate 610; and a top cover 630 covering the top surface of the battery pack housing 600. The illustrated battery pack housing 600 shows an example of two battery modules 500, in which the side plates 200 and the end plates 300 are connected together in a grid structure to form a row of three battery arrays 100.

[0074] In one battery module 500 , three battery arrays 100 are arranged in a row, with end brackets 400 exposed along the front and rear end plates 300 , and one end bracket 400 also exposed on the side brackets 210 between the end plates 300 .

[0075] Reference Figure 9 The battery pack housing 600 is provided with a rail-shaped mounting portion 640 corresponding to the connector portion 410 of the end bracket 400, and the mounting portion protrudes toward the front and rear of the battery module 500. The mounting portion 640 includes a pair of side mounting portions 642 connected to or integrally formed with the side frames 620, and a central mounting portion 644 extending across the center of the bottom plate 610.

[0076] When the battery module 500 is inserted into the space between the side mounting portion 642 and the central mounting portion 644, the connecting member portion 410 of the end bracket 400 extends along and relative to the mounting portion 640 of the battery pack housing 600, and by engaging or binding the end bracket 400 to the mounting portion 640 of the battery pack housing 600 via the connecting hole 412, all the battery blocks 10 are fixed to the battery pack housing 600.

[0077] At this time, when the end bracket 400 of each battery block 10 is engaged and fixed to the mounting portion 640 of the battery pack shell 600, the side panel 200 and the upper flanges 230 and 330 bent at the upper part of the end 300 automatically generate a downward fixing force, pressing the battery array 100 against the bottom plate 610, thereby ensuring that the battery array 100 is firmly pressed against the bottom plate 610.

[0078] The contact between the battery array 100 and the base plate 610 plays an important role in promoting the transfer of heat generated by the battery array 100 to the base plate 610. Therefore, if tolerances can be controlled so that a small gap remains between the connector portion 410 of the end bracket 400 and the mounting portion 640 when the battery block 10 or the battery module 500 is placed in the battery pack case 600, the upper flanges 230 and 330 can generate sufficient downward fixing force.

[0079] The above is only an embodiment of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the guidance of this application. Some typical well-known structures or well-known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A direct-connected anti-spill lead-acid battery, characterized in that: The battery array includes a plurality of square lead-acid batteries arranged in a row; a pair of side plates, respectively arranged on both sides of the battery array along the length direction of the battery array; and a pair of end plates, respectively arranged on the front surface and the rear surface of the battery array along the width direction of the battery array, wherein both ends of each end plate in the pair of end plates are respectively fixed on side brackets arranged at both ends of each side plate in the side plates, so that the pair of end plates and the pair of side plates are connected to each other and limit the battery array to a block, and each side plate in the pair of side plates includes a single curved plate with a "U" shape, the top of the "U" shape is open, and a space is fixed therein.

2. A direct-connected anti-spill lead-acid battery according to claim 1, characterized in that: Each of the pair of side plates includes concave surfaces located on both sides of a single curved plate, the concave surfaces being combined together to fix at least one combining rib, the concave surfaces being opposite to each other along the length direction, and each of the pair of side plates having a curved upper flange, the curved upper flange being configured to contact the top surface of the battery array.

3. A direct-connected anti-spill lead-acid battery according to claim 2, characterized in that: Each of the side brackets is provided with a coupling groove configured to receive a welding bolt protruding from a corresponding end plate of the pair of end plates, and wherein each welding bolt and each corresponding coupling groove are welded together.

4. The direct-connected anti-spill lead-acid battery according to claim 1, characterized in that: The protruding welding bolts of each end plate are arranged in a pair of welding bolts along the height direction of the battery array, and the coupling grooves of each bracket are arranged in a pair of coupling grooves along the height direction of the battery array, so that the center of the battery array in the height direction is located between the pair of welding bolts and the pair of coupling grooves.

5. The direct-connected anti-spill lead-acid battery according to claim 3, characterized in that: The connecting grooves are arranged in a first pair of connecting grooves and a second pair of connecting grooves, the first pair of connecting grooves and the second pair of connecting grooves are located on opposite sides of each of the side brackets, and the center of the first side plate of the pair of side plates in the width direction is located between the first pair of connecting grooves and the second pair of connecting grooves.

6. A direct-connected anti-spill lead-acid battery according to claim 5, characterized in that: The side bracket further includes a second battery array disposed adjacent to a first side plate of the pair of side plates. The second battery array includes a plurality of battery arrays extending in a longitudinal direction and is configured such that second welding bolts extending from a pair of second end plates disposed respectively on the front and rear surfaces of the second battery array are secured to the coupling grooves of the side bracket.

7. The direct-connected anti-spill lead-acid battery according to claim 5, characterized in that: A first end plate of the pair of end plates includes an end bracket fixed to the battery pack case, the end bracket including a connector portion extending parallel to the width direction, and the connector portion including one or more connection holes provided therethrough.

8. The direct-connected anti-spill lead-acid battery according to claim 5, characterized in that: The end bracket includes a reinforcing rib extending from the connector portion.

9. The direct-connected anti-spill lead-acid battery according to claim 5, characterized in that: The end bracket includes a connector portion extending parallel to the width direction, and the connector portion includes one or more connection holes provided therethrough.

10. The direct-connected anti-spill lead-acid battery according to claim 5, characterized in that: The end bracket includes a reinforcing rib extending from the connector portion.

Images