A lead-acid battery acid adding device and acid adding method

Abstract

The invention relates to the technical field of lead-acid batteries, and discloses an acid-adding device and an acid-adding method for lead-acid batteries. The acid-adding device comprises a lead-acid battery body and a bracket, wherein a plurality of chambers and a plurality of liquid injection ports are arranged in the lead-acid battery body, and the plurality of chambers are respectively connected with the plurality of liquid injection ports; a plurality of injection mechanisms are arranged on the bracket, and the injection mechanism comprises a syringe, and the plurality of syringes are respectively inserted into the plurality of liquid injection ports; the injection mechanism also comprises a liquid pump assembly and an opening and closing assembly arranged on the syringe; the acid-adding device and the acid-adding method for lead-acid batteries can complete liquid injection into a plurality of chambers at one time, and freely adjust the spacing between the plurality of injection mechanisms according to the distribution of liquid injection ports of lead-acid batteries of different models, and can automatically close the syringe when the liquid level rises to a certain level according to the liquid level in each chamber during liquid injection, thereby preventing acid leakage.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid batteries, in particular to an acid adding device and an acid adding method for lead-acid batteries. Background Art

[0002] Lead-acid battery is a storage battery whose electrodes are mainly made of lead and its oxides, and whose electrolyte is sulfuric acid solution. Lead-acid battery is widely used due to its low manufacturing cost, simple production process and easy repair. When the electrolyte in the lead-acid battery is partially consumed, it can be repaired by adding liquid. There are many options such as distilled water, electrolyte and repair liquid.

[0003] In the prior art, when a lead-acid battery is repaired by adding liquid, the end cover on the lead-acid battery is usually opened manually, and then the acid is injected into each chamber of the lead-acid battery through a syringe such as a syringe.

[0004] However, this method of adding acid to lead-acid batteries is inefficient because it requires injecting liquid into multiple chambers on the lead-acid battery one by one. Secondly, since the existing liquid level in each chamber is unclear, it is impossible to control and stop the injection in time during the injection, which may cause acid leakage.

[0005] Therefore, in order to solve the above technical problems existing in the prior art, a lead-acid battery acid adding device and acid adding method are proposed. Summary of the invention

[0006] The present invention provides an acid-adding device and an acid-adding method for a lead-acid battery, which can complete the filling of multiple chambers at one time, freely adjust the spacing between multiple injection mechanisms according to the distribution of injection ports of lead-acid batteries of different models, and automatically close the syringe when the liquid level rises to a certain level according to the liquid level in each chamber during the filling, thereby avoiding the beneficial effect of acid leakage. The present invention solves the problem that when adding acid to the existing lead-acid battery mentioned in the background technology, the end cover on the lead-acid battery is usually opened manually, and then the acid is injected into each chamber of the lead-acid battery through an injector such as a syringe. First, the efficiency of filling multiple chambers on the lead-acid battery one by one is low, and second, since the existing liquid level in each chamber is unclear, the filling cannot be stopped in time during the filling, which may cause the acid leakage.

[0007] The present invention provides the following technical solution: a lead-acid battery acid-adding device, comprising a lead-acid battery body and a bracket, wherein the lead-acid battery body is provided with a plurality of chambers and a plurality of liquid injection ports, and the plurality of chambers are respectively connected with the plurality of liquid injection ports;

[0008] The bracket is provided with a plurality of injection mechanisms, the injection mechanisms comprising syringes, and the plurality of syringes are respectively inserted into the plurality of injection ports;

[0009] The injection mechanism also includes a liquid pump assembly and an opening and closing assembly arranged on the syringe, and the liquid pump assembly is used to control the syringe to draw liquid and inject liquid;

[0010] The opening and closing assembly comprises a sealing groove provided on the syringe, a sealing block is slidably arranged in the sealing groove, a floating block is slidably arranged on the syringe, the floating block is connected to the sealing block, a sliding groove is provided on the sealing block, and a sealing plate is slidably arranged in the sliding groove;

[0011] When the liquid level in the chamber rises and pushes the floating block to float up, the port of the syringe is sealed by the sealing plate to stop the liquid injection.

[0012] As an optional solution of the lead-acid battery acid adding device of the present invention, wherein: the opening and closing assembly further comprises a guide rod arranged on the sealing plate, a guide groove is provided in the syringe, the guide groove is in a broken line shape inclined from bottom to top toward the center of the syringe, and the guide rod is slidably arranged in the guide groove;

[0013] Two opening and closing components are symmetrically arranged based on the central axis of the syringe.

[0014] As an optional solution of the lead-acid battery acid adding device described in the present invention, the liquid pump assembly includes a piston rod slidably arranged in the syringe, and a piston and a first slide seat are arranged on the piston rod, and the first slide seat is elastically connected to the inner wall of the syringe through a first spring.

[0015] As an optional solution of the lead-acid battery acid adding device described in the present invention, the liquid pump assembly also includes a second slide seat slidably arranged in the syringe, the piston rod is slidably connected in the second slide seat, the second slide seat is elastically connected to the inner wall of the syringe through a second spring, and the elastic coefficient of the second spring is greater than that of the first spring.

[0016] As an optional solution of the lead-acid battery acid adding device of the present invention, wherein: the bracket is also provided with a connecting mechanism, the connecting mechanism comprises a first connecting rod and a second connecting rod provided on the piston rod, the first connecting rod is slidably connected to the adjacent second connecting rod;

[0017] The syringe is provided with a third connecting rod and a fourth connecting rod, and the third connecting rod is slidably connected to the adjacent fourth connecting rod.

[0018] As an optional solution of the lead-acid battery acid adding device of the present invention, wherein: the bracket is also provided with a liquid supply mechanism, the liquid supply mechanism comprises a first pipe and a second pipe provided on the piston rod, the first pipe is slidably connected to the adjacent second pipe;

[0019] A hose is arranged on one of the first pipes, and solenoid valves are arranged in both the first pipe and the second pipe.

[0020] As an optional solution of the lead-acid battery acid adding device of the present invention, wherein: the bracket is also provided with a first adjustment mechanism, and the first adjustment mechanism is used to adjust the height of a plurality of the piston rods and a plurality of the first slide seats;

[0021] The first adjustment mechanism comprises a fifth connecting rod and a sixth connecting rod disposed on the first sliding seat, wherein the fifth connecting rod is slidably connected to the adjacent sixth connecting rod;

[0022] A lifting block is slidably arranged on the bracket, and the lifting block is connected to one of the sixth connecting rods. A first screw rod is rotatably arranged on the bracket, and the lifting block is threadedly connected to the first screw rod.

[0023] As an optional solution of the lead-acid battery acid adding device of the present invention, the plurality of liquid injection ports are arranged in a grid shape of two rows and three columns, and the bracket is further provided with a second adjustment mechanism, which is used to adjust the distance between the plurality of syringes, so that the plurality of syringes correspond to the plurality of liquid injection ports one by one;

[0024] The second adjustment mechanism includes two first limit grooves and a second limit groove opened on the bracket, wherein the two syringes are each provided with a first limit block, and the two first limit blocks are respectively slidably set in the two first limit grooves, and the other syringe is provided with a second limit block, and the second limit block is slidably connected in the second limit groove.

[0025] As an optional solution of the lead-acid battery acid adding device of the present invention, the second adjusting mechanism further comprises a second screw and a third screw rotatably arranged on the bracket, and the second screw is provided with a first external thread and a second external thread;

[0026] The two first limit blocks are respectively threadedly connected to the first external thread and the second external thread, and the pitch of the first external thread is different from that of the second external thread;

[0027] The second limiting block is threadedly connected to the third screw rod.

[0028] The present invention also provides the following technical solution: an acid adding method of a lead-acid battery acid adding device, comprising the following steps:

[0029] S1, adjusting the spacing of several syringes by rotating the second screw and the third screw respectively, and adjusting the stroke of several piston rods by rotating the first screw, opening several solenoid valves and pressing several piston rods downward until several piston rods hit several second slide seats, then connecting the hose to the container containing the acid solution, loosening several piston rods to absorb the liquid, and then closing several solenoid valves;

[0030] S2, aligning a plurality of syringes with a plurality of injection ports and inserting them, and continuously pushing a plurality of piston rods to inject the absorbed acid into a plurality of chambers;

[0031] S3. When the float block is pushed upward by floating on the liquid surface in the chamber, the two sealing plates automatically move together under the guidance of the two guide grooves to close the port of the syringe and stop injecting liquid.

[0032] The present invention has the following beneficial effects:

[0033] 1. The lead-acid battery acid-adding device and method are provided with a plurality of injection mechanisms according to the plurality of liquid injection ports on the lead-acid battery body, and a plurality of syringes can be respectively inserted into the plurality of liquid injection ports at one time. On the plurality of injection mechanisms, when extracting liquid, the strokes of the plurality of piston rods can be uniformly adjusted, which is convenient for operation. During injection, the plurality of piston rods are pressed synchronously, and the acid can be synchronously injected into the plurality of chambers at one time. Thus, the efficiency of acid-adding the lead-acid battery is greatly improved.

[0034] 2. The lead-acid battery acid adding device and method, in each chamber, taking into account the difference in the original liquid level, when the liquid level in the chamber rises to the standard height, it will automatically push the float on the syringe to trigger the two sealing plates in the syringe to move together and close the syringe. Thereby, the liquid addition is automatically stopped to avoid acid overflow.

[0035] 3. The lead-acid battery acid-adding device and method take into account that the relative distances of the injection ports distributed in rows and columns of the lead-acid battery bodies of different models are different, and the syringes distributed in rows and columns are set to be freely adjusted left and right, front and back, and during the adjustment process, the syringes in each row are kept at an equal distance, thereby improving the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the explosion structure of the lead-acid battery body in the present invention.

[0037] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0038] Figure 3 It is a first cross-sectional structural schematic diagram of the present invention as a whole.

[0039] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0040] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0041] Figure 6 for Figure 3 A partial enlarged view of point B in the middle.

[0042] Figure 7 for Figure 6 A partial enlarged view of point D in the middle.

[0043] Figure 8 It is a schematic diagram of the local structure of the present invention.

[0044] Fig. 9 It is a schematic diagram of the explosion structure of the second regulating mechanism in the present invention.

[0045] Fig.10 It is a schematic diagram of the explosion structure of the first regulating mechanism in the present invention.

[0046] Fig.11 It is a schematic diagram of the explosion structure of the opening and closing component in the present invention.

[0047] In the figure: 100, lead-acid battery body; 110, chamber; 120, liquid injection port; 130, cap; 140, end cover; 200, bracket; 300, injection mechanism; 310, syringe; 320, liquid pump assembly; 321, piston rod; 322, piston; 323, first slide seat; 324, first spring; 325, second slide seat; 326, second spring; 330, opening and closing assembly; 331, sealing groove; 332, sealing block; 333, floating block; 334, slide groove; 335, sealing plate; 336, guide rod; 337, guide groove; 400, connecting mechanism; 410, first connecting rod; 420, second connecting rod; 430, third connecting rod; 440, fourth connecting rod; 500, liquid supply mechanism; 510, first pipeline; 520, second pipeline; 530, hose; 540, solenoid valve; 600, first adjusting mechanism; 610, fifth connecting rod; 620, sixth connecting rod; 630, lifting block; 640, first screw; 700, second adjusting mechanism; 710, first limiting groove; 720, first limiting block; 730, second screw; 740, first external thread; 750, second external thread; 760, second limiting groove; 770, second limiting block; 780, third screw. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] For example, see Figure 1-Figure 11 A lead-acid battery acid adding device includes a lead-acid battery body 100 and a bracket 200. The lead-acid battery body 100 is provided with a plurality of chambers 110 and a plurality of liquid injection ports 120. The plurality of chambers 110 are respectively connected to the plurality of liquid injection ports 120.

[0050] The support 200 is provided with a plurality of injection mechanisms 300, the injection mechanisms 300 include syringes 310, and the plurality of syringes 310 are respectively inserted into the plurality of injection ports 120;

[0051] The injection mechanism 300 further includes a liquid pump assembly 320 and an opening and closing assembly 330 disposed on the syringe 310. The liquid pump assembly 320 is used to control the syringe 310 to draw liquid and inject liquid;

[0052] The opening and closing assembly 330 includes a sealing groove 331 provided on the syringe 310, a sealing block 332 is slidably provided in the sealing groove 331, a floating block 333 is slidably provided on the syringe 310, the floating block 333 is connected to the sealing block 332, a sliding groove 334 is provided on the sealing block 332, and a sealing plate 335 is slidably provided in the sliding groove 334;

[0053] When the liquid level in the chamber 110 rises and pushes the float 333 upward, the port of the syringe 310 is sealed by the sealing plate 335 to stop the injection;

[0054] The opening and closing assembly 330 further includes a guide rod 336 disposed on the sealing plate 335. A guide groove 337 is provided in the syringe 310. The guide groove 337 is in a broken line shape inclined from bottom to top toward the center of the syringe 310. The guide rod 336 is slidably disposed in the guide groove 337.

[0055] Two opening and closing components 330 are symmetrically arranged based on the central axis of the syringe 310.

[0056] In this embodiment: the lead-acid battery body 100 is a common battery, which usually includes six chambers 110, in which there are electrode plates, and electrolyte exists in the chambers 110. Each chamber 110 is provided with a liquid injection port 120, and a cap 130 is installed on the liquid injection port 120. The lead-acid battery body 100 is installed with an end cover 140 as a whole. When adding liquid, first pry open the end cover 140, and then pull out several caps 130.

[0057] The plurality of liquid injection ports 120 are usually distributed in two rows and three columns. The liquid injection ports 120 in each row are equidistant. For the convenience of description, the row at the rear side is set as the first row, the row at the front side is set as the second row, and the three columns from left to right are set as the first column, the second column and the third column respectively.

[0058] After the plurality of syringes 310 are respectively inserted into the plurality of liquid injection ports 120, the support is provided by the bracket 200 placed on the lead-acid battery body 100. At this time, the acid liquid composed of distilled water, electrolyte or special repair liquid can be injected into the plurality of chambers 110 by controlling the liquid pump assembly 320.

[0059] During the injection, specifically in each chamber 110, when the liquid level rises and contacts the float block 333, the float block 333 has a relatively small density and is subjected to a relatively large buoyancy. The float block 333 floats up and drives the two sealing blocks 332 to move upward. At this time, the two sealing plates 335 slidably mounted on the two sealing blocks 332 slide along the two guide grooves 337 under the action of the two guide rods 336. When the float block 333 floats up to the turning point of the guide groove 337, the float block 333 continues to float up, causing the two sealing plates 335 to gradually move closer together until the lower port of the syringe 310 is completely closed. This achieves automatic stop of injection.

[0060] Embodiment 2: This embodiment is an improvement on Embodiment 1. For details, please refer to Figure 1-Figure 10 The liquid pump assembly 320 includes a piston rod 321 slidably disposed in the syringe 310, a piston 322 and a first slide seat 323 are disposed on the piston rod 321, and the first slide seat 323 is elastically connected to the inner wall of the syringe 310 through a first spring 324;

[0061] The liquid pump assembly 320 further includes a second slide seat 325 slidably disposed in the syringe 310, the piston rod 321 is slidably connected in the second slide seat 325, the second slide seat 325 is elastically connected to the inner wall of the syringe 310 via a second spring 326, and the elastic coefficient of the second spring 326 is greater than that of the first spring 324;

[0062] The bracket 200 is also provided with a connecting mechanism 400, which includes a first connecting rod 410 and a second connecting rod 420 provided on the piston rod 321, and the first connecting rod 410 is slidably connected to the adjacent second connecting rod 420;

[0063] The syringe 310 is provided with a third connecting rod 430 and a fourth connecting rod 440, and the third connecting rod 430 is slidably connected to the adjacent fourth connecting rod 440;

[0064] The bracket 200 is also provided with a liquid supply mechanism 500, which includes a first pipe 510 and a second pipe 520 provided on the piston rod 321, and the first pipe 510 is slidably connected to the adjacent second pipe 520;

[0065] A hose 530 is disposed on one of the first pipes 510 , and a solenoid valve 540 is disposed in each of the first pipe 510 and the second pipe 520 ;

[0066] The bracket 200 is also provided with a first adjustment mechanism 600, which is used to adjust the height of the plurality of piston rods 321 and the plurality of first slide seats 323;

[0067] The first adjustment mechanism 600 includes a fifth connecting rod 610 and a sixth connecting rod 620 disposed on the first sliding seat 323, and the fifth connecting rod 610 is slidably connected to the adjacent sixth connecting rod 620;

[0068] A lifting block 630 is slidably disposed on the bracket 200 , and the lifting block 630 is connected to one of the sixth connecting rods 620 . A first screw rod 640 is rotatably disposed on the bracket 200 , and the lifting block 630 is threadedly connected to the first screw rod 640 .

[0069] In this embodiment: among the six syringes 310, the syringe 310 located in the second row and third column is fixed on the bracket 200, and the remaining five can move in the left and right or front and back directions. As shown in the figure, the four syringes 310 located at the four corners of the first row and first column, the first row and third column, the second row and first column, are all installed with the third connecting rod 430 and the fourth connecting rod 440. And the two syringes 310 of the first row and second column and the second row and second column are respectively installed with two third connecting rods 430 and one fourth connecting rod 440 or a third connecting rod 430 and two fourth connecting rods 440. The adjacent third connecting rod 430 is slidably connected to the adjacent fourth connecting rod 440. A total of six third connecting rods 430 and six fourth connecting rods 440 are spliced ​​into a sun-shaped shape flipped 90°, which plays the role of connecting the six syringes 310 to each other.

[0070] Similarly, the six piston rods 321 are connected by six first connecting rods 410 and six second connecting rods 420. The six first slide seats 323 are connected by six fifth connecting rods 610 and six sixth connecting rods 620. The sixth connecting rod 620 on the syringe 310 in the second row and third column can only be raised and lowered, and the sixth connecting rod 620 is connected to the lifting block 630.

[0071] When performing specific liquid injection, the first screw 640 can be rotated forward and reversely to drive the lifting block 630 to rise or fall, thereby driving the sixth connecting rod 620 on the syringe 310 in the second row and third column to rise and fall, thereby driving all the first slides 323 to rise and fall synchronously to adjust the distance between the piston rod 321 and the second slide 325.

[0072] Then press the first connecting rod 410, the second connecting rod 420 or one of the piston rods 321, in short, the six piston rods 321 will be moved down synchronously, and the first spring 324 will be compressed in this process, and the second spring 326 will not be compressed. Until the piston rod 321 is released to the second slide 325, the second spring 326 with larger elastic force will feedback larger resistance, and then stop pressing and maintain. At this time, negative pressure will be formed in the inner cavity of the six syringes 310, and six electromagnetic valves 540 will be opened by means of electric signal control and other modes. Then the hose 530 is connected in the container filled with acid solution, and the six piston rods 321 are released to make it rebound. At this time, under the negative pressure effect, the inner cavity of the six syringes 310 absorbs acid solution, and then closes the two electromagnetic valves 540 on the right side that are connected to the hose 530.

[0073] Then, after the six syringes 310 are respectively inserted into the six injection ports 120 , the six piston rods 321 are continuously pressed downward, and the acid liquid is injected into the six chambers 110 .

[0074] When the lower port of one of the syringes 310 is closed, since the inner cavities of the six syringes 310 are still interconnected and the channels can also provide a function of storing acid, when a syringe 310 is closed, continuing to press the piston rod 321 will not encounter resistance caused by the inability of the acid to flow.

[0075] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figure 1-Figure 9 , the plurality of injection ports 120 are arranged in a grid shape of two rows and three columns, and the bracket 200 is further provided with a second adjustment mechanism 700, which is used to adjust the distance between the plurality of syringes 310, so that the plurality of syringes 310 correspond to the plurality of injection ports 120 one by one;

[0076] The second adjustment mechanism 700 includes two first limiting grooves 710 and a second limiting groove 760 provided on the bracket 200, wherein the two syringes 310 are provided with a first limiting block 720, and the two first limiting blocks 720 are respectively slidably provided in the two first limiting grooves 710, and the other syringe 310 is provided with a second limiting block 770, and the second limiting block 770 is slidably connected in the second limiting groove 760;

[0077] The second adjustment mechanism 700 further includes a second screw 730 and a third screw 780 rotatably disposed on the bracket 200, and the second screw 730 is provided with a first external thread 740 and a second external thread 750;

[0078] The two first limit blocks 720 are respectively threadedly connected to the first external thread 740 and the second external thread 750, and the pitch of the first external thread 740 is different from that of the second external thread 750;

[0079] The second limiting block 770 is threadedly connected to the third screw rod 780 .

[0080] In this embodiment, since the distribution distances of the six injection ports 120 of different types of lead-acid battery bodies 100 may vary, and the injection ports 120 in each row are usually equidistant, the positions of the six syringes 310 are set to be adjustable.

[0081] When adjusting the distance between the six syringes 310, the four syringes 310 in the first and second columns can be driven to move left and right by rotating the second screw rod 730 forward and backward. The three syringes 310 in each row are equidistant, and the first stopper 720 in the first column of the second row is threadedly connected to the second external thread 750 with a larger pitch, and the first stopper 720 in the second column of the second row is threadedly connected to the first external thread 740 with a smaller pitch.

[0082] The pitch of the second external thread 750 is twice the pitch of the first external thread 740, and the pitch is equal to the stroke of the first limit block 720 when the second screw 730 rotates one circle. For example, the positions of the three syringes 310 in the second row from right to left are set to 0 / 1 / 2 respectively. At this time, the distance between the three syringes 310 is 1. When the second screw 730 rotates one circle, the syringe 310 in the second row and second column moves to the left by 1, while the syringe 310 in the second row and first column moves to the left by 2. At this time, the positions of the three syringes 310 are 0 / 2 / 4 respectively, and the three are still equidistant, and the distance between them is 2.

[0083] The three syringes 310 in the first row can be driven to move forward and backward by rotating the third screw 780 forward and backward.

[0084] For details, please refer to Example 4. Figure 1-Figure 11 , a method for adding acid to a lead-acid battery acid adding device, comprising the following steps:

[0085] S1, adjusting the spacing of the plurality of syringes 310 by rotating the second screw 730 and the third screw 780 respectively, and adjusting the stroke of the plurality of piston rods 321 by rotating the first screw 640, opening the plurality of solenoid valves 540 and pressing the plurality of piston rods 321 downward until the plurality of piston rods 321 abut against the plurality of second slide seats 325, then connecting the hose 530 to the container containing the acid solution, loosening the plurality of piston rods 321 to absorb the liquid, and then closing the plurality of solenoid valves 540;

[0086] S2, aligning a plurality of syringes 310 with a plurality of injection ports 120 and inserting them, and continuously pushing a plurality of piston rods 321 to inject the absorbed acid solution into a plurality of chambers 110;

[0087] S3. When the float block 333 is pushed upward by floating on the liquid surface in the chamber 110, the two sealing plates 335 are automatically moved together under the guidance of the two guide grooves 337 to close the port of the syringe 310 and stop injecting liquid.

[0088] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0089] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lead-acid battery acid-adding device, comprising a lead-acid battery body (100) and a bracket (200), characterized in that: A plurality of chambers (110) and a plurality of liquid injection ports (120) are provided in the lead-acid battery body (100), and the plurality of chambers (110) are respectively connected to the plurality of liquid injection ports (120); A plurality of injection mechanisms (300) are arranged on the support (200), wherein the injection mechanisms (300) include syringes (310), and the plurality of syringes (310) are respectively inserted into the plurality of injection ports (120); The injection mechanism (300) further comprises a liquid pump assembly (320) and an opening and closing assembly (330) arranged on the syringe (310), wherein the liquid pump assembly (320) is used to control the syringe (310) to extract and inject liquid; The opening and closing assembly (330) comprises a sealing groove (331) provided on the syringe (310), a sealing block (332) being slidably disposed in the sealing groove (331), a floating block (333) being slidably disposed on the syringe (310), the floating block (333) being connected to the sealing block (332), a sliding groove (334) being provided on the sealing block (332), and a sealing plate (335) being slidably disposed in the sliding groove (334); When the liquid level in the chamber (110) rises and pushes the floating block (333) upward, the port of the syringe (310) is sealed by the sealing plate (335) to stop the injection of liquid; The liquid pump assembly (320) comprises a piston rod (321) slidably disposed in the syringe (310), the piston rod (321) being provided with a piston (322) and a first sliding seat (323), the first sliding seat (323) being elastically connected to the inner wall of the syringe (310) via a first spring (324); The liquid pump assembly (320) further comprises a second slide seat (325) slidably disposed in the syringe (310), the piston rod (321) being slidably connected in the second slide seat (325), the second slide seat (325) being elastically connected to the inner wall of the syringe (310) via a second spring (326), and the elastic coefficient of the second spring (326) is greater than that of the first spring (324); The opening and closing assembly (330) further comprises a guide rod (336) arranged on the sealing plate (335); a guide groove (337) is provided in the syringe (310); the guide groove (337) is in the shape of a broken line inclined from bottom to top toward the center of the syringe (310); the guide rod (336) is slidably arranged in the guide groove (337); Two opening and closing components (330) are symmetrically arranged based on the central axis of the syringe (310).

2. A lead-acid battery acid adding device according to claim 1, characterized in that: The bracket (200) is further provided with a connection mechanism (400), the connection mechanism (400) comprising a first connection rod (410) and a second connection rod (420) provided on the piston rod (321), the first connection rod (410) being slidably connected to an adjacent second connection rod (420); The syringe (310) is provided with a third connecting rod (430) and a fourth connecting rod (440), and the third connecting rod (430) is slidably connected to the adjacent fourth connecting rod (440).

3. A lead-acid battery acid adding device according to claim 2, characterized in that: The bracket (200) is also provided with a liquid supply mechanism (500), the liquid supply mechanism (500) comprising a first pipe (510) and a second pipe (520) provided on the piston rod (321), the first pipe (510) being slidably connected to the adjacent second pipe (520); A hose (530) is provided on one of the first pipes (510), and solenoid valves (540) are provided in both the first pipe (510) and the second pipe (520).

4. A lead-acid battery acid adding device according to claim 3, characterized in that: The bracket (200) is also provided with a first adjustment mechanism (600), and the first adjustment mechanism (600) is used to adjust the height of a plurality of the piston rods (321) and a plurality of the first slide seats (323); The first adjustment mechanism (600) comprises a fifth connecting rod (610) and a sixth connecting rod (620) which are arranged on the first sliding seat (323), and the fifth connecting rod (610) is slidably connected to the adjacent sixth connecting rod (620); A lifting block (630) is slidably disposed on the bracket (200), and the lifting block (630) is connected to one of the sixth connecting rods (620). A first screw rod (640) is rotatably disposed on the bracket (200), and the lifting block (630) is threadedly connected to the first screw rod (640).

5. A lead-acid battery acid adding device according to claim 4, characterized in that: The plurality of injection ports (120) are arranged in a grid shape of two rows and three columns. The support (200) is further provided with a second adjustment mechanism (700), and the second adjustment mechanism (700) is used to adjust the distance between the plurality of syringes (310), so that the plurality of syringes (310) correspond one to one with the plurality of injection ports (120); The second adjustment mechanism (700) comprises two first limiting grooves (710) and a second limiting groove (760) which are opened on the bracket (200), wherein the two syringes (310) are each provided with a first limiting block (720), and the two first limiting blocks (720) are respectively slidably provided in the two first limiting grooves (710), and the other syringe (310) is provided with a second limiting block (770), and the second limiting block (770) is slidably connected in the second limiting groove (760).

6. A lead-acid battery acid adding device according to claim 5, characterized in that: The second adjustment mechanism (700) further comprises a second screw rod (730) and a third screw rod (780) rotatably disposed on the bracket (200), and the second screw rod (730) is provided with a first external thread (740) and a second external thread (750); The two first limit blocks (720) are respectively threadedly connected to the first external thread (740) and the second external thread (750), and the pitch of the first external thread (740) is different from that of the second external thread (750); The second limiting block (770) is threadedly connected to the third screw rod (780).

7. The acid adding method of the lead-acid battery acid adding device according to claim 6, characterized in that: The steps include: S1, adjusting the spacing between the plurality of syringes (310) by rotating the second screw (730) and the third screw (780) respectively, and adjusting the stroke of the plurality of piston rods (321) by rotating the first screw (640), opening the plurality of solenoid valves (540) and pressing the plurality of piston rods (321) downward until the plurality of piston rods (321) abut against the plurality of second slide seats (325), then connecting the hose (530) to a container containing acid liquid, loosening the plurality of piston rods (321) to aspirate liquid, and then closing the plurality of solenoid valves (540); S2, aligning a plurality of syringes (310) with a plurality of injection ports (120) and inserting them, and continuously pushing a plurality of piston rods (321) to inject the absorbed acid into a plurality of chambers (110); S3. When the float (333) is pushed upward by floating on the liquid surface in the chamber (110), the two sealing plates (335) automatically move together under the guidance of the two guide grooves (337) to close the port of the syringe (310) and stop the injection of liquid.

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