A flooded AGM valve-regulated lead-acid battery

Abstract

The invention relates to the technical field of lead-acid batteries; discloses a flooded AGM valve-regulated lead-acid battery, comprising a battery shell and a plurality of pole groups, wherein the battery shell comprises a top cover provided with vent holes and a shell; a plurality of plastic partition walls are provided in the shell, and a vertical plate is provided on a side of the top cover close to the shell; a plastic shell tank comprises a plurality of high liquid level tanks and a low liquid level tank; a safety valve and a connecting valve are provided on the top cover; two plastic shell tanks are connected by an A connecting pipe, and the A connecting pipe is connected to the safety valve; the other end of the A connecting pipe is connected to the low liquid level tank; the ratio of the weight of the positive plate grid to the weight of the paste board is greater than 1.3; and a positive plate grid and a negative plate grid are both provided with a plate having an area of ​​less than 36 mm 2 The present invention prevents leakage of battery electrolyte, makes the internal resistance of positive and negative plates smaller, and outputs larger current, prevents thermal runaway, and increases the electrolyte storage capacity. The improvement of positive and negative plates provides sufficient and necessary conditions for increasing the service life of the battery.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid batteries, in particular to a flooded AGM valve-controlled lead-acid storage battery. Background Art

[0002] In the prior art, the four types of AGM valve-regulated lead-acid batteries are all liquid-free, that is, the electrolyte is stored in the AGM separator, and there is no excess electrolyte that submerges the electrode group and the electrolyte above it.

[0003] The existing lean AGM valve-regulated batteries have the following technical problems: they require a voltage-stabilizing power supply with high charging voltage accuracy and low voltage. Under these conditions, thermal runaway may easily occur, causing the battery to heat up and swell, resulting in the battery being scrapped, i.e., the average life span is short.

[0004] When using flooded AGM valve-regulated lead-acid batteries, there are exhaust holes that easily produce acidic water vapor that is compressed into liquid by the atmosphere, corroding equipment and the environment. Summary of the invention

[0005] The object of the present invention is to provide a flooded AGM valve-regulated lead-acid battery, which is specifically applied to four types of AGM valve-regulated lead-acid batteries for starting, energy storage, power and postal and telecommunications; and can effectively improve the service life of the battery.

[0006] The present invention is achieved through the following technical solutions:

[0007] A flooded AGM valve-regulated lead-acid battery, comprising a battery shell, and a plurality of pole groups installed in the battery shell, wherein the battery shell comprises a top cover with a vent hole on the side and a shell body for installing the pole groups in cooperation with the top cover; a plurality of plastic partition walls are arranged in parallel to each other to divide the shell body into a plurality of plastic shell grooves, and a vertical plate corresponding to the plastic partition wall is arranged on a side of the top cover close to the shell body; the plastic shell grooves comprise a plurality of high liquid level grooves and a low liquid level groove; a safety valve is arranged at a position corresponding to the high liquid level groove of the top cover, and a connecting rod is arranged at a position corresponding to the low liquid level groove of the top cover. The two adjacent plastic shell tanks are connected by an A connecting pipe, and the A connecting pipe is connected to the safety valve; the end of the A connecting pipe close to the low liquid level tank is connected to the low liquid level tank, and the low liquid level tank is connected to the vent through a connecting valve; the electrode group includes a positive plate, a negative plate, and an AGM separator arranged between the positive plate and the negative plate; the positive plate includes a positive plate grid and a paste board extruded with the positive plate grid; the ratio of the weight of the positive plate grid to the weight of the paste board is greater than 1.3; the positive plate grid and the negative plate grid in the negative plate are both provided with mesh holes, and the mesh holes are less than 36mm in area 2 square hole.

[0008] The low liquid level tank and the high liquid level tank are both filled with electrolyte, and the distance between the liquid level of the electrolyte in the low liquid level tank and the top cover is greater than the distance between the liquid level of the electrolyte in the high liquid level tank and the top cover, so that the remaining volume in the low liquid level tank that is not filled with electrolyte is larger.

[0009] When charging, gas is generated inside the plastic tank, and the gas moves upward and enters the safety valve. As the gas pressure continues to increase, when it reaches a certain pressure, the safety valve will open and transport the gas to the low liquid level tank. Since the remaining volume of the low liquid level tank that is not filled with electrolyte is large, the pressure is reduced, so that the gas discharged from the vent hole will not be compressed into liquid, thereby avoiding liquid corrosion to the locomotive.

[0010] The above arrangement greatly increases the weight of the positive grid in the positive plate, which prolongs the time for the grid to be completely oxidized, thereby increasing the service life.

[0011] Furthermore, in order to better realize the present invention, the safety valve includes a throttle valve and a high-pressure valve mounted on the side of the throttle valve away from the top cover, and the pressure of the high-pressure valve is 10Kpa-30Kpa. When the gas pressure in the high liquid level tank reaches above 10Kpa, the high-pressure valve will open, so that the gas enters the low liquid level tank and then is discharged.

[0012] Furthermore, in order to better implement the present invention, a circular annular channel A is provided on the outer side of the throttle valve, and a throttle valve vent hole connected to the circular annular channel A is provided on the side of the throttle valve close to the top cover.

[0013] Furthermore, in order to better realize the present invention, a high-pressure valve mounting groove for mounting a high-pressure valve is provided on the side of the throttle valve away from the top cover, and the high-pressure valve includes a valve body tube with a spiral airflow channel on the outside and a rubber cover installed on the side of the valve body tube close to the top cover; the side wall of the high-pressure valve is provided with a spiral airflow channel; a rubber cover mounting groove is provided on the side of the valve body tube close to the top cover, and a B connecting channel connected to the spiral airflow channel is provided on the side wall of the rubber cover mounting groove.

[0014] Further, in order to better realize the present invention, the connecting valve includes a connecting valve body with a B annular channel on the outside and connected to the low liquid level tank, and an anti-dialysis liquid tube sleeved on the side of the connecting valve body away from the top cover. The side of the connecting valve body away from the anti-dialysis liquid tube is provided with a C through hole connected to the anti-dialysis liquid tube and the B annular channel. The diameter of the C through hole is 1.5mm, and the opening pressure of the connecting valve is 1Kpa.

[0015] Furthermore, in order to better implement the present invention, the electrode group also includes a positive electrode busbar connected to the positive electrode grid and a negative electrode busbar connected to the negative electrode plate.

[0016] Furthermore, in order to better implement the present invention, each of the electrode groups includes N-1 positive electrode plates and N negative electrode plates, and each positive electrode plate is located between adjacent negative electrode plates.

[0017] Furthermore, in order to better realize the present invention, the AGM separator is made of ultra-fine glass fiber wool;

[0018] The positive electrode grid and the negative electrode grid in the negative electrode plate are both made of lead-calcium alloy material.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] (1) The present invention uses a safety valve and a low liquid level tank in combination, so that the exhaust gas will not be compressed into liquid, thereby avoiding corrosion to the locomotive;

[0021] (2) The present invention effectively prevents the battery from tipping over, tilting or inverting during storage and transportation, thereby preventing the electrolyte from leaking out, causing damage to the battery and polluting the environment.

[0022] (3) The present invention improves the positive grid, so that its service life is longer than that of existing batteries;

[0023] (4) The present invention improves the positive plate grid and the negative plate grid, so that the internal resistance of the positive plate and the negative plate is smaller than that of the positive plate and the negative plate of the existing battery, and the output current is larger;

[0024] (5) The present invention has a simple structure and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the battery shell in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the safety valve in the present invention;

[0027] Figure 3 It is a cross-sectional schematic diagram of the safety valve in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the connecting valve in the present invention;

[0029] Figure 5 It is a cross-sectional schematic diagram of the connecting valve in the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the electrode group and the battery shell of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the positive electrode grid in the present invention;

[0032] Among them, 1. battery shell; 11. plastic partition wall; 12. high liquid level tank; 13. low liquid level tank; 2. top cover; 21. vent; 22. vertical plate; 23. safety valve; 231. throttle valve; 2311. annular channel A; 2312. throttle valve vent; 232. high pressure valve; 2321. rubber cover; 2322. connecting channel B; 2323. spiral air flow channel; 24. connecting valve; 241. annular channel B; 242. through hole C; 243. anti-analysis liquid pipe; 25. A connecting pipe; 3. pole group; 31. negative plate; 311. AGM separator; 32. positive plate; 321. mesh. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0037] Embodiment 1:

[0038] The present invention is achieved through the following technical solutions: Figure 1-Figure 7As shown, a flooded AGM valve-regulated lead-acid battery comprises a battery shell 1, and a plurality of pole groups 3 installed in the battery shell 1, wherein the battery shell 1 comprises a top cover 2 with a vent hole 21 on the side thereof and a shell body which is mounted in cooperation with the top cover 2 and is used to install the pole groups 3; a plurality of plastic partition walls 11 which divide the shell body into a plurality of plastic shell grooves and are arranged parallel to each other are arranged in the shell body, and a vertical plate 22 corresponding to the plastic partition wall 11 is arranged on a side of the top cover 2 close to the shell body; the plastic shell grooves comprise a plurality of high liquid level grooves 12 and a low liquid level groove 13; a vertical plate 22 is arranged at a position of the top cover 2 corresponding to the high liquid level groove 12, and a connecting valve 24 is arranged at a position of the top cover 2 corresponding to the low liquid level groove 13; two adjacent plastic shell grooves are connected by an A connecting pipe 25, and the A connecting pipe 25 is connected to the vertical plate 22; one end of the A connecting pipe 25 close to the low liquid level groove 13 is connected to the low liquid level groove 13, and the low liquid level groove 13 is connected to the vent hole 21 through the connecting valve 24.

[0039] A connecting valve 24 communicating with the low liquid level tank 13 is provided at a position corresponding to the top cover 2 and the low liquid level tank 13 ; a safety valve 23 communicating with the high liquid level tank 12 is provided at a position corresponding to the top cover 2 and the high liquid level tank 12 .

[0040] It should be noted that, through the above improvements, the pole group 3 is installed in the plastic shell tank, and the low liquid level tank 13 and the high liquid level tank 12 are both filled with electrolyte, and the distance between the liquid level of the electrolyte in the low liquid level tank 13 and the top cover 2 is greater than the distance between the liquid level of the electrolyte in the high liquid level tank 12 and the top cover 2. As a result, the remaining volume in the low liquid level tank 13 that is not filled with electrolyte is larger. A low liquid level tank 13 is arranged in parallel with multiple high liquid level tanks 12; multiple high and low liquid level tanks 12 form a high liquid level large tank, and the low liquid level tank 13 is arranged on one side of the high liquid level large tank.

[0041] Gas is generated inside the plastic shell tank during charging, and the gas moves upward and enters the safety valve 23. As the gas pressure continues to increase, when it reaches a certain pressure, the safety valve 23 will open and transport the gas to the low liquid level tank 13. Since the remaining volume of the low liquid level tank 13 that is not filled with electrolyte is large, the pressure is reduced, and the flow rate of the gas becomes smaller, so that the gas discharged from the vent hole 21 will not be compressed into liquid by atmospheric pressure, thereby avoiding corrosion to the locomotive by the compressed liquid.

[0042] Preferably, there is one low liquid level tank 13 and five high liquid level tanks 12 .

[0043] A vent hole 21 is provided on the side of the top cover 2 near the low liquid level tank 13, and the high liquid level tank 12 is connected in sequence through the A connecting pipe 25, and then connected to the low pressure tank through the A connecting pipe 25; the top cover 2 is provided with a safety valve 23 at the position corresponding to the high liquid level tank 12, the number of high liquid level tanks 12 is the same as the safety valve 23 and they are arranged one by one, and are connected to the A connecting pipe 25 and the high liquid level tank 12 respectively; wherein the A connecting pipe 25 and the safety valve 23 are always in a connected state, and the safety valve 23 and the high liquid level tank 12 will only open when the pressure reaches a certain requirement, and will be in a closed state if the specified pressure is not reached. The safety valve 23 mainly plays the role of controlling the switch and closing the channel, thereby realizing the opening and closing of the gas channel.

[0044] Figure 7 As shown, the positive grid and the negative grid of the negative plate 31 are both provided with meshes 321, and the meshes 321 have an area of ​​less than 36 mm. 2 Square hole;

[0045] Preferably, the square hole is a square hole. Since the paste board and the positive grid are extruded, the lead paste in the paste board enters the mesh 321 under the action of the extrusion force. The smaller the square hole, the larger the contact area between the lead paste in the paste board and the positive grid, thereby reducing the internal resistance of the battery. The smaller the internal resistance of the battery, the greater the output current when the current is output.

[0046] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0047] Embodiment 2:

[0048] This embodiment is further optimized based on the above embodiment. Figure 1 As shown, further, in order to better realize the present invention, the low liquid level tank 13 and the high liquid level tank 12 are both filled with electrolyte, the liquid level of the electrolyte in the low liquid level tank 13 is at a distance D from the top cover 2, and the liquid level of the electrolyte in the high liquid level tank 12 is at a distance d from the top cover 2, Dd=25mm.

[0049] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0050] Embodiment 3:

[0051] This embodiment is further optimized based on the above embodiment. Figure 2 , Figure 3As shown, further, in order to better implement the present invention, the safety valve 23 includes a throttle valve 231 and a high-pressure valve 232 mounted on the side of the throttle valve 231 away from the top cover 2, and the pressure of the high-pressure valve 232 is 10Kpa-30Kpa. When the air pressure in the high liquid level tank 12 reaches above 10Kpa, the high pressure valve 232 will open, so that the gas enters the low liquid level tank 13 and then is discharged.

[0052] It should be noted that, through the above improvements, the throttle valve 231 is connected to the A connecting pipe 25, and the high-pressure valve 232 is connected to the high liquid level tank 12. Only when the pressure in the high liquid level tank 12 reaches above 10Kpa, the high-pressure valve 232 will open to realize the discharge of gas.

[0053] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0054] Embodiment 4:

[0055] This embodiment is further optimized based on the above embodiment. Figure 2 , Figure 3 As shown, further, in order to better implement the present invention, a circular annular channel 2311 is provided on the outer side of the throttle valve 231, and a throttle valve vent 2312 connected to the circular annular channel 2311 is provided on the side of the throttle valve 231 close to the top cover 2.

[0056] It should be noted that, through the above-mentioned improvement, the gas in the high liquid level tank 12 which is relatively far away from the low liquid level tank 13 can enter the low liquid level tank 13 through the A connecting pipe 25 and the A circular channel 2311 which are connected once. The A circular channel 2311 makes the flow distance longer and the flow speed slower.

[0057] When the air pressure in the high liquid level tank 12 opens the high pressure valve 232 , the gas will be discharged into the low liquid level tank 13 through the high pressure valve 232 , the throttle valve vent 2312 , the A annular channel 2311 , and the A connecting pipe 25 in sequence.

[0058] The top cover 2 is provided with a mounting hole for mounting the throttle valve 231 , the mounting hole is threadedly connected to the throttle valve 231 , and the A annular channel 2311 is provided on the outer surface between the threads on the top cover 2 and the throttle valve 231 . The mounting hole is communicated with the A connecting pipe 25 .

[0059] The throttle valve vent hole 2312 is arranged between the A circular annular channel 2311 and the top cover 2.

[0060] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0061] Embodiment 5:

[0062] This embodiment is further optimized based on the above embodiment. Figure 2 , Figure 3 As shown, a high-pressure valve mounting groove for mounting a high-pressure valve 232 is provided on the side of the throttle valve 231 away from the top cover 2, and the high-pressure valve 232 includes a valve body tube with a spiral airflow channel 2323 on the outside and a rubber cover 2321 installed on the side of the valve body tube close to the top cover 2; the side wall of the high-pressure valve 232 is provided with a spiral airflow channel 2323; a rubber cover mounting groove is provided on the side of the valve body tube close to the top cover 2, and a B connecting channel 2322 connected to the spiral airflow channel 2323 is provided on the side wall of the rubber cover mounting groove.

[0063] The rubber cover mounting groove is connected to the B connecting channel 2322 , and is connected to the spiral airflow channel 2323 through the connecting channel 2322 .

[0064] Under the action of air pressure, the rubber cover 2321 moves toward the side close to the top cover 2, so that the gas entering the B connecting channel 2322 from the spiral air flow channel 2323 enters the throttle valve vent 2312, and then enters the A circular channel 2311, thereby entering the common channel formed by the A connecting pipe 25, and then discharged into the low liquid level tank 13.

[0065] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0066] Embodiment 6:

[0067] This embodiment is further optimized based on the above embodiment. Figure 4 , Figure 5 As shown, further, in order to better implement the present invention, the connecting valve 24 includes a connecting valve body with a B annular channel 241 provided on the outside and connected to the low liquid level tank 13, and an anti-dispersion liquid tube 243 sleeved on the side of the connecting valve body away from the top cover 2. A C through hole 242 connected to the anti-dispersion liquid tube 243 and the B annular channel 241 is provided on the side of the connecting valve body away from the anti-dispersion liquid tube 243.

[0068] The gas entering the low liquid level tank 13 passes through the anti-dialysis liquid pipe 243, the C through hole 242, and the B annular channel 241, and then enters the vent hole 21 for discharge. The diameter of the C through hole 242 is 1.5 mm; at this time, the opening pressure corresponding to the connecting valve 24 is 1 Kpa. Compared with the connecting valve in the prior art, the filter plate is eliminated, and the C through hole 242 will not be blocked, making the performance more reliable and reducing the processing cost.

[0069] Preferably, the distance between the electrolyte surface and the electrolyte surface of the anti-dialysis liquid tube 243 close to the electrolyte is 15-20 mm;

[0070] The anti-liquidation tube 243 will effectively prevent the electrolyte from leaking out when the whole structure is tilted or inverted during use and transportation. When the battery is tilted or inverted, the electrolyte will flow into the low liquid level tank 13 under the influence of air pressure. The anti-liquidation tube 243 is set so that the electrolyte entering the low liquid level tank 13 will enter the connecting valve 24 only when the electrolyte accumulates to a length that exceeds the length of the anti-liquidation tube 243 extending into the low liquid level tank 13; this prevents electrolyte leakage when the battery is tilted or inverted; effectively prevents electrolyte leakage and environmental pollution caused by tilting or inverting.

[0071] The outer side of the valve body of the connecting valve 24 is provided with an external thread, and the top cover 2 is provided with a connecting valve 24 mounting hole with a threaded hole used in conjunction with the connecting valve 24 .

[0072] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0073] Embodiment 7:

[0074] This embodiment is further optimized based on the above embodiment. Figure 1 As shown, further, in order to better realize the present invention, further, in order to better realize the present invention, the thickness of the outer shell plate arranged parallel to the shell and the plastic partition wall 11 is greater than the thickness of the plastic partition wall 11.

[0075] It should be noted that, through the above improvements, in order to avoid deformation and possible leakage or cracking when subjected to a large internal air pressure, the thickened layer structure design can effectively increase the structural strength of the shell, especially for the side wall that is not in direct contact with the plastic partition wall 11. The plastic partition wall 11 is a, and the thickness of the outer shell plate of the shell parallel to the plastic partition wall 11 is A, Aa=5-6mm.

[0076] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0077] Embodiment 8:

[0078] This embodiment is further optimized based on the above embodiment. Figure 6 As shown, further, in order to better realize the present invention, the electrode group 3 includes a positive electrode plate 32, a negative electrode plate 31 and an AGM separator 311 disposed between the positive electrode plate 32 and the negative electrode plate 31; the positive electrode plate 32 includes a positive electrode grid and a paste plate extruded with the positive electrode grid; the ratio of the weight of the positive electrode grid to the weight of the paste plate is greater than 1.3. The paste plate is extruded on the positive electrode grid so that the two form a whole;

[0079] The weight of the positive plate grid in one positive plate 32 is more than 1.3 times the weight of the paste plate in the positive plate 32 .

[0080] Preferably, one positive plate 32 includes two positive grids and two paste boards, and one positive grid and one paste board are arranged correspondingly; the two positive grids in one positive plate 32 are far away from each other, so that the material on the paste board is not easy to fall off during use. The AGM separator 311 is arranged between the positive grid and the negative plate 31.

[0081] The above arrangement greatly increases the weight of the positive grid in the positive plate 32, so that the time for the grid to be completely oxidized is longer, thereby making the grid more resistant to oxidation and thus having a longer service life.

[0082] Furthermore, in order to better implement the present invention, the electrode group 3 further includes a positive electrode busbar connected to the positive electrode grid and a negative electrode busbar connected to the negative electrode plate 31 .

[0083] Furthermore, in order to better implement the present invention, each of the electrode groups 3 includes N-1 positive electrode plates 32 and N negative electrode plates 31 , and each positive electrode plate 32 is located between two adjacent negative electrode plates 31 .

[0084] Furthermore, in order to better realize the present invention, the AGM separator 311 is made of ultra-fine glass fiber wool; the ultra-fine glass fiber wool here is AGM; the positive electrode grid and the negative electrode grid in the negative electrode plate 31 are both made of lead-calcium alloy material.

[0085] It should be noted that, through the above-mentioned improvements, the ultra-fine glass fiber wool can reduce oxygen into water for use when the liquid is unsaturated, thereby increasing its service life.

[0086] The other parts of this embodiment are the same as those of the above embodiment, so they will not be described in detail.

[0087] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A flooded AGM valve-regulated lead-acid battery, comprising a battery shell (1), a plurality of electrode groups (3) mounted in the battery shell (1), the battery shell (1) comprising a top cover (2) having a vent hole (21) disposed on a side thereof, and a shell body mounted in cooperation with the top cover (2) and used for mounting the electrode groups (3); a plurality of plastic partition walls (11) are disposed in parallel to each other and divide the shell body into a plurality of plastic shell grooves, the battery shell (1) comprising: A vertical plate (22) corresponding to the plastic partition wall (11) is arranged on one side of the top cover (2) close to the shell; the plastic shell tank comprises a plurality of high liquid level tanks (12) and a low liquid level tank (13); a safety valve (23) is arranged at a position of the top cover (2) corresponding to the high liquid level tank (12), and a connecting valve (24) is arranged at a position of the top cover (2) corresponding to the low liquid level tank (13); two adjacent plastic shell tanks are connected via an A connecting pipe (25), and the A connecting pipe (25) is in communication with the safety valve (23); one end of the A connecting pipe (25) close to the low liquid level tank (13) is in communication with the low liquid level tank (13), and the low liquid level tank (13) is in communication with the vent hole (21) via the connecting valve (24); The electrode group (3) comprises a positive electrode plate (32), a negative electrode plate (31), and an AGM separator (311) arranged between the positive electrode plate (32) and the negative electrode plate (31); the positive electrode plate (32) comprises a positive electrode grid and a paste plate extruded and formed with the positive electrode grid; the ratio of the weight of the positive electrode grid to the weight of the paste plate is greater than 1.3; the positive electrode grid and the negative electrode grid in the negative electrode plate (31) are both provided with mesh holes (321), and the mesh holes (321) have an area of ​​less than 36 mm. 2 Square hole; The safety valve (23) comprises a throttle valve (231) and a high-pressure valve (232) mounted on a side of the throttle valve (231) away from the top cover (2), wherein the pressure of the high-pressure valve (232) is 10 Kpa-30 Kpa; The connecting valve (24) comprises a connecting valve body having a B annular channel (241) provided on the outside and connected to the low liquid level tank (13), and an anti-analysis liquid tube (243) sleeved on a side of the connecting valve body away from the top cover (2); a C through hole (242) connected to the anti-analysis liquid tube (243) and the B annular channel (241) is provided on a side of the connecting valve body away from the anti-analysis liquid tube (243).

2. A flooded AGM valve-regulated lead-acid battery according to claim 1, characterized in that: An A-circular annular channel (2311) is provided on the outside of the throttle valve (231), and a throttle valve vent hole (2312) connected to the A-circular annular channel (2311) is provided on a side of the throttle valve (231) close to the top cover (2).

3. A flooded AGM valve-regulated lead-acid battery according to claim 2, characterized in that: A high-pressure valve mounting groove for mounting a high-pressure valve (232) is provided on a side of the throttle valve (231) away from the top cover (2); the high-pressure valve (232) comprises a valve body tube with a spiral airflow channel (2323) provided on the outside, and a rubber cover (2321) installed on a side of the valve body tube close to the top cover (2); a spiral airflow channel (2323) is provided on a side wall of the high-pressure valve (232); a rubber cover mounting groove is provided on a side of the valve body tube close to the top cover (2), and a B connecting channel (2322) connected to the spiral airflow channel (2323) is provided on the side wall of the rubber cover mounting groove.

4. The flooded AGM valve-regulated lead-acid battery according to claim 1, characterized in that: The diameter of the C through hole (242) is 1.5 mm, and the opening pressure of the connecting valve (24) is 1 Kpa.

5. A flooded AGM valve-regulated lead-acid battery according to any one of claims 1 to 4, characterized in that: The electrode group (3) also includes a positive electrode busbar connected to the positive electrode grid and a negative electrode busbar connected to the negative electrode plate (31).

6. A flooded AGM valve-regulated lead-acid battery according to claim 5, characterized in that: The AGM separator (311) is made of ultra-fine glass fiber wool; the positive electrode grid and the negative electrode grid in the negative electrode plate (31) are both made of lead-calcium alloy material.

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