Lead-acid battery with balanced heat dissipation and manufacturing method thereof

Abstract

The application discloses a lead-acid storage battery with balanced heat dissipation and a manufacturing method thereof, and aims to solve the problem that the existing battery adopts six single cells arranged in a straight line, so that the single cell in the middle of the battery has poor heat dissipation performance. The application solves the above technical problem by the following technical scheme: a battery shell is arranged, six single cells are arranged in the battery shell and arranged in a 2*3 form; a battery cover is arranged in cooperation with the battery shell; a pole group is arranged in the single cell, the pole group comprises a plurality of positive plates and a plurality of negative plates, a partition plate is arranged between adjacent plates, the plurality of positive plates are connected with a positive bus bar, and the plurality of negative plates are connected with a negative bus bar. The single cell is arranged in a 2*3 form, and the width direction of the pole group is arranged to be the same as the width direction of the battery shell, so that the pressure surface becomes six, and the heat dissipation area is increased, and the heat dissipation efficiency of the lead-acid storage battery is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lead-acid storage battery, more particularly, it relates to a lead-acid storage battery with balanced heat dissipation and a manufacturing method thereof. BACKGROUND

[0002] The lead-acid storage battery used by the electric vehicle is an important factor to support the performance of the electric vehicle, but the performance of the battery is greatly affected by the temperature. The lead-acid storage battery is usually tightly installed in the electric vehicle, which affects the heat dissipation of the battery, especially in the high-temperature season, which further affects the performance of the battery.

[0003] And the existing battery will continuously produce gas after being used for a certain period of time, and the newly produced gas continuously accumulates in the interior of the battery, so that the battery is expanded by the gas, causing the battery to leak and other conditions, affecting the environment. At the same time, since the battery is installed in the electric vehicle, it is difficult for the user to timely discover the gas production condition of the battery in the process of continuous gas production of the battery. Even if the user discovers that the battery is swollen, it is also difficult to determine whether the battery has reached the standard of replacement.

[0004] Chinese patent publication No. CN201620630093.0, published on December 7, 2016, the name of the invention is a battery tank for preventing deformation of the bulging, the application discloses a battery tank for preventing deformation of the bulging, the 6 single cells of the lead-acid storage battery in the above application are arranged in a straight line, the pressure surface is in the same straight line, and the heat generated by the electrochemical reaction of the pole group is mainly transmitted to the adjacent single cell through the shell wall of the pressure surface to reduce the temperature in the interior, which causes a large difference in heat transfer between the internal single cell and the external single cell, so that the utilization rate of the lead paste of the middle pole group and the two end pole groups in the battery is different, resulting in the single cell lag phenomenon of the battery. And the high temperature in the battery cannot be quickly cooled, causing the temperature of the battery to rise sharply, accelerating the aging of the battery tank; the battery loses water too fast, the gas produced causes the internal pressure to be too large, and the battery is seriously swollen and fails; the temperature rises, the corrosion of the grid is intensified, the diffusion speed of the sulfate ions in the electrolyte is accelerated, the degree of sulfation of the negative plate is accelerated, and the cycle life of the battery is sharply shortened. SUMMARY

[0005] The present application overcomes the following deficiencies of the prior art lead-acid storage battery: (1) the battery adopts 6 single cells arranged in a straight line, which makes the heat dissipation performance of the middle single cell poor; (2) the battery is easily swollen by the pressure of the internal gas, causing the battery to leak; a lead-acid storage battery with balanced heat dissipation is provided, which can improve the heat dissipation effect of the battery and prolong the service life of the battery.

[0006] In order to solve the above technical problems, the present application adopts the following technical scheme: a lead-acid storage battery with balanced heat dissipation, comprising:

[0007] The battery shell is provided with six single cells arranged in a 2*3 form;

[0008] The battery cover cooperates with the battery shell.

[0009] The pole group is arranged in the single cell, and the pole group comprises a plurality of positive pole plates and a plurality of negative pole plates, a separator is arranged between adjacent pole plates, the plurality of positive pole plates are connected with the positive bus bar, and the plurality of negative pole plates are connected with the negative bus bar.

[0010] The single cell is arranged in a 2*3 form, the width direction of the pole group is arranged to be the same as the width direction of the battery shell, compared with two pressure surfaces in the existing single cell 1*6 arrangement mode, the pressure surface is changed to six, the lead paste utilization rate of each single cell is more uniform, and the phenomenon that the single cell is backward due to uneven battery single cell temperature is improved; meanwhile, the area of heat dissipation is increased, and the heat dissipation efficiency of the lead storage battery is effectively improved.

[0011] As preferred, reinforcing ribs are arranged on both sides of the width direction of the battery shell.

[0012] The reinforcing ribs are arranged on both sides of the width direction of the shell, and the arrangement of the reinforcing ribs can improve the size of the pressure borne by the battery shell and strengthen the expansion pressure of the single inner pole group.

[0013] As preferred, a plurality of clamping strips are arranged on one side of the width direction of the battery shell, and a plurality of clamping grooves are arranged on the other side of the width direction of the battery shell, and the clamping strips are matched with the clamping grooves of the adjacent battery shell when the plurality of battery shells are arranged.

[0014] Through the cooperation of the clamping grooves and the clamping strips, the spacing between the adjacent batteries can be maintained while ensuring the stability of the battery installation when the battery is installed, and the spacing between the two can improve the heat dissipation effect.

[0015] As preferred, a plurality of springs are arranged in the clamping grooves, the clamping strips are matched with the clamping grooves of the adjacent battery shell when the plurality of battery shells are arranged, one end of the spring abuts against the bottom of the clamping groove, and the other end of the spring abuts against the clamping strip.

[0016] The spring can provide elastic force to the clamping groove and the clamping strip, so that the battery can be buffered, and the influence of vibration on the battery can be reduced.

[0017] As preferred, a plurality of gas venting openings are arranged on the battery cover and communicated with the single cells, and a gas venting device is arranged on the gas venting opening.

[0018] Through the arrangement of the gas venting device, the gas in the battery can be leaked out of the battery through the gas venting device.

[0019] As preferred, the gas venting device is a pressure valve.

[0020] The pressure valve can be opened only when the battery has a certain pressure inside, so as to discharge the gas. The air inside the battery can be effectively prevented from entering the battery, and the gas inside the battery can be discharged after the battery has a certain pressure, so as to prevent the battery from swelling due to excessive gas pressure inside the battery.

[0021] As preferred, the battery cover is provided with a plurality of gas vents in communication with the single cell, and a collection air bag is arranged in the battery cover and communicated with the gas vents through a pipeline; the battery cover is provided with a pressure measuring hole communicated with the collection air bag, and a piston and an abutting spring are arranged in the pressure measuring hole; the piston slides along the pressure measuring hole, and the abutting spring is arranged between the bottom of the pressure measuring hole and the piston.

[0022] In order to intuitively observe the size of the gas pressure inside the battery, the piston and the abutting spring are arranged, so that when the piston is subjected to the pressure of the gas in the collection air bag, the piston slides along the pressure measuring hole, and the position of the piston in the pressure measuring hole can be observed to observe the condition of the internal gas pressure; the maintenance personnel can be facilitated to overhaul.

[0023] As preferred, the battery cover is provided with a pressure relief device, the pressure relief device comprises a first abutting pin and a first spring, a first mounting hole is arranged in the side wall of the pressure measuring hole in the radial direction, the first abutting pin is arranged in the first mounting hole, and the first spring is arranged between the first mounting hole and the first abutting pin; an inclined surface is arranged at the end of the first abutting pin, and the side wall of the piston is provided with a bayonet matched with the inclined surface; a pressure relief hole is arranged on the side wall of the pressure measuring hole, one end of the pressure relief hole is communicated with the pressure measuring hole, and the other end of the pressure relief hole is communicated with the outside; when the piston is subjected to the thrust of the gas and the bayonet is clamped on the inclined surface, the pressure relief hole is communicated with the collection air bag through the pressure measuring hole at this time.

[0024] When the gas pressure inside reaches a certain size, the gas pushes the piston to move, so that the bayonet on the piston is matched with the inclined surface on the first abutting pin, the first abutting pin limits the movement of the piston, and at the same time, the pressure relief hole is communicated with the collection air bag through the pressure measuring hole, so that the gas in the collection air bag can be discharged outward through the pressure relief hole.

[0025] As preferred, a whistle is connected to the end of the pressure relief hole away from the pressure measuring hole.

[0026] The whistle is arranged, so that the gas discharged through the pressure relief hole produces a sound when passing through the whistle, reminding the driver to check and replace the battery.

[0027] The application also provides a manufacturing method of the lead-acid storage battery, comprising the following steps:

[0028] In the first step, the pole group is placed in the single cell, and the width direction of the pole group corresponds to the width direction of the battery shell.

[0029] The second step is electrode group casting and welding, which connects each electrode group in series through a positive busbar and a negative busbar; positive and negative terminals are respectively set at both ends of the battery cover along its length, and the positive and negative terminals of the connected electrode groups are connected to the positive and negative terminals respectively.

[0030] The third step is to manufacture semi-finished batteries by sealing the battery casing and battery cover together with epoxy resin glue and welding terminals on the positive and negative terminals.

[0031] The fourth step is the production of finished batteries. The semi-finished batteries are oxidized and formed to obtain finished batteries, and the positive and negative terminals of the batteries are in the same direction and position as in existing technologies.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) Increase the number of pressure surfaces to make the lead paste utilization rate of each cell more uniform and improve the phenomenon of cell lagging caused by uneven cell temperature.

[0034] (2) Increase the heat dissipation area, which effectively improves the heat dissipation efficiency of lead-acid batteries. At the same time, the setting of card strips and card slots further improves the heat dissipation effect of the battery.

[0035] (3) It can determine the pressure inside the collection bag by judging the position of the piston sliding in the pressure measuring hole, which is convenient for maintenance personnel to inspect and repair.

[0036] (4) Set up a whistle to remind the driver to check and replace the battery. Attached Figure Description

[0037] Figure 1 This is an exploded view of the present invention;

[0038] Figure 2 This is a structural diagram of the battery casing of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of several battery casings assembled together according to the present invention;

[0040] Figure 4 This is a schematic diagram of the structure of several battery cases installed together according to another embodiment of the present invention;

[0041] Figure 5 This is a cross-sectional view of the battery cover according to another embodiment of the present invention;

[0042] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0043] Figure 7 Is with Figure 5Structural diagrams of the same structure in different states;

[0044] Figure 8 yes Figure 7 A magnified view of a portion of the image;

[0045] In the diagram: 1. Battery casing, 11. Single cell, 12. Clip, 13. Slot, 131. Spring, 14. Positive terminal, 15. Negative terminal;

[0046] 2. Battery cover, 21. Vent, 22. Airbag, 23. Pressure test hole, 231. Piston, 2311. Bayonet, 232. Abutment spring, 241. First mounting hole, 242. Pressure relief hole, 243. Second mounting hole, 244. Third mounting hole;

[0047] 3. Extreme group,

[0048] 4. Pressure relief device; 41. First abutment pin; 411. Inclined surface; 412. Second inclined surface; 42. First spring.

[0049] 5. Whistling;

[0050] 6. Locking rod; 61. First locking rod inclined surface; 62. Locking rod hole; 63. Second locking rod inclined surface.

[0051] 7. The second spring;

[0052] 8. Third abutment pin; 81. Third inclined surface; 82. Third abutment spring;

[0053] 9. Airway, 91. Airbag. Detailed Implementation

[0054] The technical solution of the present invention will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0055] Example 1: Refer to Figures 1 to 3 As shown, the battery case 1 has six individual cells 11 arranged in a 2x3 configuration.

[0056] Battery cover 2, which mates with battery casing 1;

[0057] Electrode group 3 is set in cell 11. Electrode group 3 includes several positive electrode plates and several negative electrode plates. A partition is set between adjacent electrode plates. Several positive electrode plates are connected to the positive electrode busbar and several negative electrode plates are connected to the negative electrode busbar. The electrode groups in each cell 11 are connected in series through the positive electrode busbar and the negative electrode busbar. Positive electrode post 14 and negative electrode post 15 are respectively set at both ends of the battery cover in the length direction. The positive electrode of the series-connected electrode group is welded to the positive electrode post, and the negative electrode of the series-connected electrode group is welded to the negative electrode post 15.

[0058] The battery casing 1 has reinforcing ribs on both sides in the width direction. One side of the reinforcing rib in the width direction of the battery casing 1 is set as a retaining strip, and the other side of the reinforcing rib in the width direction of the battery casing 1 is set as a retaining strip 12. When several battery casings 1 are arranged, the retaining strip 12 cooperates with the retaining groove 13 of the adjacent battery casing 1.

[0059] In this embodiment, the individual cells are arranged in a 2x3 configuration, and the width direction of the electrode group 3 is set to be the same as the width direction of the battery casing 1. Compared with the existing 1x6 arrangement of individual cells, which only has two pressure surfaces, this arrangement increases the number of pressure surfaces to six, making the lead paste utilization rate of each individual cell 11 more uniform and improving the phenomenon of uneven temperature in individual cells 11 that causes them to lag behind. At the same time, the heat dissipation area is increased, effectively improving the heat dissipation efficiency of the lead-acid battery. The reinforcing ribs are set on both sides of the width direction of the battery casing 1. The setting of the reinforcing ribs can increase the pressure that the battery casing 1 can withstand and strengthen the pressure of the expansion of the individual inner electrode group 3. At the same time, through the cooperation of the slot 13 and the clip 14, the battery installation can be made stable while maintaining the spacing between adjacent batteries. The spacing between the batteries can improve the heat dissipation effect.

[0060] Example 2: Refer to Figures 1 to 3 As shown, this embodiment is similar in structure to embodiment 1, except that the battery cover 2 is provided with a number of vents 21 that are connected to the single cell 11, and the vents 21 are provided with venting devices.

[0061] The venting device can be a rubber cap fitted onto the vent. The rubber cap is made of rubber and has an exhaust hole. When the gas in a single cell reaches a certain amount, the rubber cap expands, causing the exhaust hole on the rubber cap to open and allowing the gas in the single cell to be expelled.

[0062] In this embodiment, the venting device is configured as a pressure valve (not shown in the figure, representing existing technology). The pressure valve opens only after the battery has reached a certain internal pressure, releasing the gas. This effectively prevents internal air from entering the battery and allows the gas inside the battery to be released once a certain pressure is reached, preventing the battery from swelling and leaking internal liquid due to excessive internal gas pressure.

[0063] Example 3, referring to Figures 1 to 4 As shown, this embodiment is similar in structure to embodiment 1 or embodiment 2, except that a plurality of springs 131 are provided in the slot 13. When a plurality of battery cases 1 are arranged, the card strip 12 cooperates with the slot 13 of the adjacent battery case 1. One end of the spring 131 abuts against the bottom of the slot 13, and the other end of the spring 131 abuts against the card strip 12.

[0064] In this embodiment, the spring 131 provides elastic force to the card slot 13 and the card strip 12, thereby buffering the battery and reducing the impact of vibration on the battery.

[0065] Example 4: Reference Figures 1 to 6 As shown, this embodiment is structurally similar to Embodiment 2, except for the improvement of the battery cover 2, specifically:

[0066] The battery cover 2 has several vents 21 connected to the individual cells 11. An air collection bladder 22, made of elastic material, is installed inside the battery cover 2 and is connected to the vents 21 via a pipe (not shown in the figure). A pressure measuring hole 23 is provided on the battery cover 2, connected to the air collection bladder 22. A piston 231 and a retaining spring 232 are installed inside the pressure measuring hole 23. The piston 231 slides along the pressure measuring hole 23, and the retaining spring 232 abuts against the bottom of the pressure measuring hole 23 and the piston 231. A transparent material is provided at the location on the battery cover 2 corresponding to the pressure measuring hole 23, allowing the position of the piston 231 inside the pressure vent 23 to be observed through the battery cover 2. Pressure scale lines are also provided along the pressure measuring hole 23 according to actual conditions.

[0067] In this embodiment, when the piston 231 is subjected to the pressure of the gas inside the collection bladder 22, the piston 231 slides along the pressure measuring hole 23, and the internal gas pressure can be observed by the position of the piston 231 inside the pressure measuring hole 23; this facilitates maintenance personnel's inspection.

[0068] Example 5: Refer to Figures 1 to 6 As shown, this embodiment is structurally similar to embodiment 4, except that a pressure relief device 4 is provided on the battery cover 2. The pressure relief device 4 includes a first abutment pin 41 and a first spring 42. A first mounting hole 241 is provided radially on the side wall of the pressure measuring hole 23. The first abutment pin 41 is disposed in the first mounting hole 241, and the first spring 42 abuts between the first mounting hole 241 and the first abutment pin 41. An inclined surface 411 is provided at the end of the first abutment pin 41, and a bayonet 2311 that mates with the inclined surface 411 is provided on the side wall of the piston 23. A pressure relief hole 242 is provided on the side wall of the pressure measuring hole 23. One end of the pressure relief hole 242 is connected to the pressure measuring hole 23, and the other end of the pressure relief hole 23 is connected to a whistle 5. When the piston 231 is pushed by gas, causing the bayonet 2311 to engage with the inclined surface 411, the pressure relief hole 242 is connected to the air collection bag 22 through the pressure measuring hole 23.

[0069] The working principle of this embodiment is as follows: When the gas pressure inside the collecting airbag 22 reaches a certain level, the gas pushes the piston 231 to move. Before the latch 2311 on the piston 231 engages with the inclined surface on the first abutment pin 41, the piston 231 blocks the pressure measuring hole 23, so that the pressure inside the collecting airbag 22 will not be discharged from the pressure relief hole 242. When the latch 2311 on the piston 231 engages with the inclined surface 411 on the first abutment pin 41, the first abutment pin 41 restricts the movement of the piston 231. At this time, the pressure relief hole 242 is connected to the collecting airbag 22 through the pressure measuring hole 23, so that the gas inside the collecting airbag 22 can be discharged outward through the pressure relief hole 242. The gas discharged from the pressure relief port 242 produces a sound when it passes the whistle 5, reminding the driver to check and replace the battery. Since the air collection bag 22 will only discharge from the pressure relief port 242 after collecting a certain amount of gas, and the size of the pressure measuring port 23 is controlled, the gas inside the air collection bag 22 can be discharged for a long time, so that the whistle 5 will keep sounding, making it easier to remind the driver.

[0070] Example 6: Refer to Figures 1 to 8 As shown, this embodiment is structurally similar to embodiment 5, except that a second mounting hole 243 is provided inside the battery cover 2. The second mounting hole 243 connects vertically through the pressure relief hole 242 and communicates with the first mounting hole 241. A locking rod 6 and a second spring 7 are provided inside the second mounting hole 243. One end of the second spring 7 abuts against the end of the second mounting hole 243 away from the first mounting hole 241, and the other end of the second spring 7 abuts against the locking rod 6. A first locking rod inclined surface 61 is provided at the end of the locking rod 6 near the first mounting hole 241, and a first abutting pin 41 is provided with a surface that is inclined to the first locking rod 61. The second inclined surface 412 abuts against the first locking rod inclined surface 61; the locking rod 6 is provided with a locking rod hole 62; the end of the locking rod 6 away from the first mounting hole 241 is provided with a second locking rod inclined surface 63, the side wall of the second mounting hole 243 is provided with a third mounting hole 244 communicating with it, a third abutting pin 8 is provided in the third mounting hole 244, the third abutting pin 8 is provided with a third inclined surface 81, the third inclined surface 81 abuts against the second locking rod inclined surface 63; a third spring 82 is provided in the third mounting hole 244 to push the third abutting pin 8 to move towards the locking rod 6.

[0071] The working principle of this embodiment is as follows: In this embodiment, in order to ensure that the pressure relief hole 242 will only discharge gas after the latch 2311 on the piston 231 abuts against the inclined surface 411, and to ensure that the gas stored in the collection bag 22 can be discharged in time when it reaches a certain pressure, this embodiment is set up, referring to... Figure 6As shown, initially: the piston 231 is not engaged with the first abutment pin 41. The locking rod 6 is pushed by the second spring 7 and abuts against the first abutment pin 41. At this time, the locking rod hole 62 and the pressure relief hole 242 are intersected, and the pressure relief hole 242 is blocked. During operation: when the piston 231 abuts against the abutment surface 411 on the first abutment pin 41, the first abutment pin 41 moves into the first mounting hole 241. When the first abutment pin 41 moves inward, the second inclined surface 412 acts on the first locking rod inclined surface 61, and the second inclined surface 412 pushes the locking rod 6 downward. When the first abutment pin 41 is completely pushed into the first mounting hole 241, the locking rod 6 also moves downward to the bottom. At this time, the third abutment pin 8 is moved towards the locking rod 6 by the force of the third spring 82. The third abutment surface 81 abuts against the second locking rod inclined surface 63, and the third abutment pin 8 restricts the displacement of the locking rod 6. Ventilation state: as shown Figure 8 As shown, the locking rod hole 62 engages with the pressure relief hole 242, allowing gas to escape from the pressure relief hole 242. Therefore, this structure provides a safety locking function, effectively ensuring that gas is only released from the pressure relief hole 242 after the latch 2311 on the piston 231 abuts against the inclined surface 411. This prevents gas leakage before the piston 231 contacts the first abutment pin 41, ensuring that the gas stored in the collection bladder 22 can be released promptly when it reaches a certain pressure.

[0072] Example 7: This example is similar to Example 5 and Example 6, except that the end of the pressure relief hole 242 away from the pressure measuring hole 23 is connected to the air guide tube 9, the whistle 5 is set inside the air guide tube 9, the end of the air guide tube 9 away from the pressure measuring hole is connected to the air bag 91, and the air bag 91 is set on the side wall of the battery case 1.

[0073] In order to collect the gas and prevent it from polluting the air, an airbag 91 is provided in this embodiment. When the gas flows out from the pressure relief hole 242, it is collected by the airbag 91. The collected airbag 91 inflates and comes into contact with the adjacent batteries, which can buffer the adjacent batteries.

[0074] This invention also provides a method for manufacturing a lead-acid battery, comprising the following steps:

[0075] The first step is to place electrode group 3 into the slot. Place electrode group 3 in the single cell 11, with the width direction of electrode group 3 corresponding to the width direction of battery case 1.

[0076] The second step is to weld the electrode group 3, connecting each electrode 3 in series through the positive and negative busbars; positive terminal 14 and negative terminal 15 are respectively provided at both ends of the battery cover 2 along the length direction, and the positive and negative terminals of the connected electrode group 3 are connected to the positive terminal 14 and negative terminal 15 respectively.

[0077] The third step is to manufacture semi-finished batteries by sealing the battery casing and battery cover together with epoxy resin glue and welding terminals on the positive terminal 14 and negative terminal 15.

[0078] The fourth step is the production of finished batteries. The semi-finished batteries are oxidized and formed to obtain finished batteries. The positive and negative terminals of the batteries are in the same direction and position as in existing technologies. This allows the batteries to maintain the existing connection method with the load through the terminals, improving the compatibility of the batteries.

[0079] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A lead-acid battery with balanced heat dissipation, characterized in that it comprises: The battery casing contains six individual compartments arranged in a 2x3 configuration. Battery cover, which fits into the battery casing; An electrode group is set in a single cell. The electrode group includes several positive electrode plates and several negative electrode plates. A partition is set between adjacent electrode plates. Several positive electrode plates are connected to a positive electrode busbar, and several negative electrode plates are connected to a negative electrode busbar. The battery cover is provided with a pressure testing hole. The side wall of the pressure testing hole is provided with a first mounting hole and a pressure relief hole communicating with the pressure testing hole in a radial direction. A first abutment pin is provided in the first mounting hole. The battery cover has a second mounting hole that is connected to and perpendicularly passes through the pressure relief hole and is connected to the first mounting hole. The second mounting hole has a locking rod that can abut against the first abutting pin. The locking rod has a locking rod hole that can cooperate with the pressure relief hole. The side wall of the second mounting hole is provided with a third mounting hole that communicates with it, and the third mounting hole is provided with a third abutment pin that can abut against the locking rod.

2. The lead-acid battery with balanced heat dissipation according to claim 1, characterized in that, The battery casing has reinforcing ribs on both sides in the width direction.

3. The lead-acid battery with balanced heat dissipation according to claim 1, characterized in that, Several locking strips are provided on one side of the battery case in the width direction, and several locking slots are provided on the other side of the battery case in the width direction. When several battery cases are arranged, the locking strips cooperate with the locking slots of the adjacent battery cases.

4. The lead-acid battery with balanced heat dissipation according to claim 3, characterized in that, The slot contains several springs. When several battery cases are arranged, the locking strip engages with the slot of the adjacent battery case. One end of the spring abuts against the bottom of the slot, and the other end of the spring abuts against the locking strip.

5. The lead-acid battery with balanced heat dissipation according to claim 1, characterized in that, The battery cover has several vents that are connected to the individual cells, and each vent is equipped with a venting device.

6. The lead-acid battery with balanced heat dissipation according to claim 5, characterized in that, The venting device is a pressure valve.

7. The lead-acid battery with balanced heat dissipation according to claim 1, characterized in that, The battery cover has several vents that are connected to individual cells. Inside the battery cover is a collection bladder, which is connected to the vents via a pipe. The pressure test hole is connected to the collection bladder. Inside the pressure test hole is a piston and a retaining spring. The piston slides along the pressure test hole, and the retaining spring abuts against the bottom of the pressure test hole and between the piston and the piston.

8. The lead-acid battery with balanced heat dissipation according to claim 7, characterized in that, The battery cover is equipped with a pressure relief device, which includes a first abutment pin and a first spring. The side wall of the pressure measuring hole is provided with a first mounting hole in the radial direction. The first abutment pin is disposed in the first mounting hole, and the first spring abuts between the first mounting hole and the first abutment pin. The end of the first abutment pin is provided with an inclined surface, and the side wall of the piston is provided with a bayonet that mates with the inclined surface. The side wall of the pressure measuring hole is provided with a pressure relief hole. One end of the pressure relief hole is connected to the pressure measuring hole, and the other end of the pressure relief hole is connected to the outside. When the piston is pushed by the gas and the bayonet is engaged with the inclined surface, the pressure relief hole is connected to the air collection bag through the pressure measuring hole.

9. The lead-acid battery with balanced heat dissipation according to claim 8, characterized in that, A whistle is connected to the end of the pressure relief port that is away from the pressure measuring port; a vent tube is connected to the end of the pressure relief port that is away from the pressure measuring port, and the whistle is placed inside the vent tube. An air bladder is connected to the end of the vent tube that is away from the pressure measuring port, and the air bladder is placed on the side wall of the battery casing.

10. A method for manufacturing a lead-acid battery with balanced heat dissipation as described in claim 1, characterized in that, Includes the following steps: The first step is to place the electrode group in the slot, with the width of the electrode group corresponding to the width of the battery case. The second step is electrode group casting and welding, which connects each electrode group in series through a positive busbar and a negative busbar; positive and negative terminals are respectively set at both ends of the battery cover along its length, and the positive and negative terminals of the connected electrode groups are connected to the positive and negative terminals respectively. The third step is the production of semi-finished batteries. Several vents connected to individual cells are set on the battery cover. An air collection bladder is set inside the battery cover, and the air collection bladder is connected to the vents through a pipe. A pressure testing hole is set on the battery cover, and the pressure testing hole is connected to the air collection bladder. A piston and a retaining spring are set inside the pressure testing hole, so that the piston slides along the pressure testing hole, and the retaining spring abuts against the bottom of the pressure testing hole and between the piston. The battery casing and battery cover are glued together with epoxy resin adhesive, and terminals are welded to the positive and negative terminals. The fourth step is the production of finished batteries. The semi-finished batteries are oxidized and formed to obtain finished batteries, and the positive and negative terminals of the batteries are in the same direction and position as in existing technologies.

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