Storage battery with double-exhaust structure

Abstract

The invention discloses a storage battery with a double-exhaust structure, and relates to the technical field of storage batteries. The storage battery with the double-exhaust structure comprises a battery body and an exhaust cover, wherein the exhaust structure is arranged in the exhaust cover; the exhaust structure comprises a first exhaust structure and a second exhaust structure; the first exhaust structure comprises a first exhaust channel and a first waterproof breathable sheet, the first exhaust channel is formed in the exhaust cover, an air inlet end of the first exhaust channel is communicated with an inner cavity of the battery body, and an air outlet end is communicated with external atmosphere; the first waterproof breathable sheet is mounted at the air outlet end of the first exhaust channel; the second exhaust structure comprises a liquid adding channel and a pressure release valve, the liquid adding channel is formed in the exhaust cover, the liquid adding end of the liquid adding channel is communicated with external atmosphere, the liquid outlet end is communicated with the inner cavity of the battery body, and the pressure release valve is mounted at the liquid adding end of the liquid adding channel. The first exhaust structure and the second exhaust structure are matched for exhausting, so that double insurance is realized, and the swelling risk in operation after colloid is added into the electrolyte of the storage battery is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of storage batteries, and in particular to a storage battery with a double exhaust structure. Background Art

[0002] During operation, flooded parking batteries are mostly deep-cycle discharged. The low-voltage charging and deep-discharging working mode will cause the battery to be undercharged, and the electrolyte stratification will be serious, resulting in premature capacity loss or failure of the parking battery. In order to suppress the stratification of flooded parking batteries, many manufacturers choose to add silica colloids to the electrolyte to increase the discharge capacity to increase the parking time and service life. Heavy trucks have bad driving conditions, bumpy driving, or when the battery is charged with a large current, the electrolyte will overflow onto the exhaust cover and soak the air filter. The air filter is contaminated with silica colloids and it is very easy to block the battery exhaust nozzle. The gas generated during the subsequent battery charging process cannot be discharged smoothly through the air filter, causing the battery internal pressure to be too high and the battery to swell. Once the exhaust nozzle is blocked, there is a greater risk of bursting.

[0003] Therefore, how to reduce the swelling risk of the glue-filled flooded parking type battery is a problem that those skilled in the art need to solve urgently. Summary of the invention

[0004] In view of this, the present invention aims to provide a battery with a dual exhaust structure to at least to some extent solve the problem in the prior art that the exhaust holes on the outer cover are easily blocked, causing the battery to swell and pose a safety hazard.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A storage battery with a double exhaust structure comprises a battery body and an exhaust cover, wherein the battery body has an open top, the exhaust cover is arranged at the open top and connected to the battery body, and an exhaust structure is arranged inside the exhaust cover; the exhaust structure comprises a first exhaust structure and a second exhaust structure arranged at intervals;

[0007] The first exhaust structure comprises a first exhaust channel and a first waterproof breathable sheet, wherein the first exhaust channel is opened inside the exhaust cover and the air inlet end thereof is connected to the inner cavity of the battery body, and the air outlet end thereof is connected to the outside atmosphere; the first waterproof breathable sheet is installed at the air outlet end of the first exhaust channel;

[0008] The second exhaust structure includes a liquid filling channel and a pressure relief valve. The liquid filling channel is opened inside the exhaust cover and its liquid filling end is connected to the outside atmosphere, and its liquid outlet end is connected to the inner cavity of the battery body. The pressure relief valve is installed at the liquid filling end of the liquid filling channel.

[0009] The beneficial effects that can be achieved by the present invention are as follows: during the use of the battery of the present invention, the gas generated inside the battery is discharged through the first exhaust structure, and the pressure relief valve plays a role in blocking the liquid addition channel to prevent the internal electrolyte from flowing out; when the colloid in the electrolyte blocks the first waterproof breathable sheet and the first exhaust structure cannot exhaust normally, the gas is exhausted through the pressure relief valve to adjust the internal pressure of the battery. The present invention uses the first exhaust structure and the second exhaust structure to cooperate in exhausting gas, realizing double insurance, and greatly reducing the risk of swelling during operation after the battery electrolyte is added with colloid.

[0010] Furthermore, the exhaust structure also includes a second exhaust channel arranged in the exhaust cover, and two ends of the second exhaust channel are respectively connected to the air inlet end of the first exhaust channel and the liquid outlet end of the liquid adding channel.

[0011] Furthermore, there are multiple exhaust structures, and mutually communicating vents are provided between the second exhaust passages of the multiple exhaust structures.

[0012] Furthermore, a plurality of the liquid adding channels are provided, each of the liquid adding channels is communicated with the second exhaust channel, and the pressure relief valve is installed at the liquid adding end of each of the liquid adding channels.

[0013] Furthermore, a plurality of labyrinth reflux channels are provided, and each of the liquid adding channels is provided with the labyrinth reflux channels on the outer peripheral side, and the inlet end of each of the labyrinth reflux channels is connected to the second exhaust channel, and the reflux end is connected to the liquid outlet end of the liquid adding channel.

[0014] Furthermore, the height of the inner bottom wall of the labyrinth-type reflux channel gradually decreases from its inlet end to its reflux end.

[0015] Further, the pressure relief valve comprises a valve body, a connecting ring, a valve sleeve, a valve cover and a valve cover limit cover, the valve body is mounted on the inner wall of the liquid adding channel close to its liquid adding end, and is provided with a mounting hole communicating with the liquid adding channel, and the connecting ring is fixed on the inner wall of the mounting hole away from the liquid adding end of the liquid adding channel;

[0016] The valve sleeve is coaxially arranged with the mounting hole and one end of the valve sleeve is connected to the inner ring side of the connecting ring, and the other end of the valve sleeve is provided with a first air outlet hole; the valve cover is provided with a sealing sliding cover along the axial direction of the valve sleeve at the other end thereof to block or open the first air outlet hole; the valve cover limiting cover is fixed on the inner wall of the mounting hole on the side of the valve cover close to the liquid filling end of the liquid filling channel and has a gap H between the valve cover and the valve cover, and a plurality of second air outlet holes are provided on the valve cover limiting cover.

[0017] Furthermore, the anti-leakage component includes a second waterproof breathable sheet and a second waterproof breathable sheet pressure cover, the second waterproof breathable sheet is installed on the side of the valve cover limit cover close to the liquid adding end of the liquid adding channel, the second waterproof breathable sheet pressure cover is pressed on the side of the second waterproof breathable sheet close to the liquid adding end of the liquid adding channel, and it is provided with a plurality of third air outlet holes.

[0018] Furthermore, the pressure relief valve also includes a dustproof component, which includes a positioning pin and a dustproof cover. The end of the valve body close to the liquid filling end of the liquid filling channel is circumferentially evenly spaced with a plurality of positioning holes corresponding to the outer circumferential side of the mounting hole. The plurality of positioning pins correspond one-to-one to the plurality of positioning holes and one end is positioned and connected in the positioning hole; the dustproof cover is fixed to the other end of the plurality of positioning pins and has an air-permeable gap H between the dustproof cover and the valve body to enable the third air outlet to communicate with the outside world.

[0019] Furthermore, the pressure relief valve also includes a liquid baffle plate, one end of which is fixed on the inner wall of the mounting hole corresponding to the valve sleeve away from the liquid adding end of the liquid adding channel, and the other end is inclined in the direction away from the liquid adding end of the liquid adding channel and is provided with an upper air channel passing through the axial direction of the mounting hole.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a battery with a double exhaust structure, which has the following beneficial effects:

[0021] 1. The present invention utilizes the first waterproof breathable sheet and the first exhaust channel to form a first exhaust structure, and the pressure relief valve and the liquid adding channel to form a second exhaust structure, thereby achieving double insurance and greatly reducing the risk of swelling during operation of the battery electrolyte after adding colloid.

[0022] 2. The liquid adding channel of the present invention is connected to the first exhaust channel through the second exhaust channel, and each of the liquid adding channels is connected to the second exhaust channel, so that the gas in the liquid adding channel and the gas in the first exhaust channel can communicate with each other, and vents are provided between the second exhaust channels of the plurality of exhaust structures, so that when any first waterproof breathable sheet or any pressure relief valve cannot exhaust, exhaust can be exhausted through other first waterproof breathable sheets or pressure relief valves, thereby ensuring that the battery can be exhausted and preventing the battery from swelling.

[0023] 3. The pressure relief valve can be adjusted automatically according to the internal pressure of the battery, which can not only play a sealing role but also be used for exhaust.

[0024] 4. The pressure relief valve is provided with a dustproof component to prevent dust from clogging the second waterproof breathable sheet, and the liquid baffle is provided to prevent the electrolyte from gushing upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the main structure of a battery with a double exhaust structure provided by the present invention.

[0027] Figure 2 A schematic top view of a battery with a double exhaust structure provided by the present invention.

[0028] Figure 3 This is a schematic diagram of the top structure of the inner cover provided by the present invention.

[0029] Figure 4 This is a schematic bottom view of the structure of the outer cover provided by the present invention.

[0030] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of part A.

[0031] Figure 6 for Figure 1 The enlarged structural diagram of part B is shown in the figure.

[0032] Figure 7 This is a schematic cross-sectional structure diagram of the pressure relief valve provided by the present invention.

[0033] Figure 8 This is a schematic diagram of the liquid adding channel structure provided by the present invention.

[0034] Fig. 9 for Figure 3 Schematic diagram of the enlarged structure of part C in the middle.

[0035] In the figure: 1. battery body, 2. exhaust cover, 21. inner cover, 22. outer cover, 3. first exhaust structure, 31. first exhaust channel, 311. air inlet section, 312. air outlet section, 32. first waterproof breathable sheet, 4. second exhaust structure, 41. liquid adding channel, 42. pressure relief valve, 421. valve body, 4211. mounting hole, 422. connecting ring, 423. valve sleeve, 4231. first air outlet, 424. valve cover, 425. valve cover limit cover, 426. anti-leakage component, 4261. second waterproof breathable sheet, 4262. second waterproof breathable sheet pressure cover, 427. dustproof component, 4271. positioning pin, 4272. dustproof cover, 428. liquid baffle plate, 4281. upper air channel, 43. sealing ring, 5. second exhaust channel, 6. vent, 7. labyrinth reflux channel. DETAILED DESCRIPTION

[0036] 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.

[0037] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1-Figure 9 The embodiment of the present invention discloses a storage battery with a dual exhaust structure, including a battery body 1 and an exhaust cover 2. The battery body 1 is open at the top, and the exhaust cover 2 is arranged at the open position and connected to the battery body 1, and an exhaust structure is arranged inside the exhaust cover; the exhaust structure includes a first exhaust structure 3 and a second exhaust structure 4 arranged at intervals;

[0040] The first exhaust structure 3 includes a first exhaust channel 31 and a first waterproof breathable sheet 32. Figure 5 As shown, the first exhaust channel 31 includes an air inlet section 311 arranged along the cover surface direction perpendicular to the exhaust cover 2 and an air outlet section 312 arranged parallel to the cover surface of the exhaust cover 2, one end of the air inlet section 311 is connected to the inner cavity of the battery body, one end of the air outlet section 312 is connected to the air inlet section 311, and the other end is connected to the external atmosphere, and the arrow direction in the figure is the gas flow direction; the first waterproof breathable sheet 32 ​​is installed at the air inlet end of the air outlet section 312;

[0041] The second exhaust structure 4 includes a liquid adding channel 41 and a pressure relief valve 42. The liquid adding channel 41 is opened inside the exhaust cover 2 along a direction perpendicular to the cover surface of the exhaust cover 1, and its liquid adding end is connected to the outside atmosphere, and the liquid outlet end is connected to the inner cavity of the battery body 1. The pressure relief valve 42 is installed at the liquid adding end of the liquid adding channel 41.

[0042] During the use of the battery of the present invention, the gas generated inside is discharged through the exhaust channel through the first waterproof breathable sheet 32. When the colloid in the electrolyte blocks the first waterproof breathable sheet 32, the internal pressure increases, and the pressure is released through the pressure relief valve 42 to adjust the internal pressure of the battery. The present invention uses the first waterproof breathable sheet 32 ​​and the first exhaust channel 31 to form a first exhaust structure, and uses the pressure relief valve 42 and the liquid adding channel 41 to form a second exhaust structure, thereby achieving double insurance and greatly reducing the risk of swelling during operation of the battery after adding colloid to the electrolyte.

[0043] See also Figure 3-Figure 4 The exhaust structure further includes a second exhaust channel 5 disposed in the exhaust cover 2, and the two ends of the second exhaust channel 5 are respectively connected to the air inlet end of the first exhaust channel 31 and the liquid outlet end of the liquid adding channel 41. The liquid adding channel 41 is connected to the first exhaust channel 31, so that the gas in the liquid adding channel 41 is interconnected with the gas in the first exhaust channel 31, thereby enhancing the exhaust effect.

[0044] According to the size of the battery, multiple exhaust structures can be provided, and vents 6 are provided between the second exhaust passages 5 of the multiple exhaust structures. When the first waterproof breathable sheet 32 ​​of any exhaust structure is blocked, the internal gas can flow through the vents 6 to other exhaust structures for further exhaust.

[0045] According to different sizes of the battery, a plurality of liquid adding channels 41 may be provided, each of which is connected to the second exhaust channel 5 , and a pressure relief valve 42 is installed at the liquid adding end of each liquid adding channel 41 .

[0046] See also Figure 3 , Figure 4 and Fig. 9 , a plurality of labyrinth reflux channels 7 are provided, and the plurality of labyrinth reflux channels 7 correspond to the plurality of liquid adding channels 41 one by one, and each labyrinth reflux channel 7 is opened on the outer peripheral side of the liquid adding channel 41, and its inlet end is connected to the second exhaust channel 5, and the reflux end is respectively connected to the outlet end of the corresponding liquid adding channel 41 to prevent the electrolyte from gushing out of the liquid adding channel 41. The water generated by the battery or the splashed electrolyte flows back into the battery body 1 through the labyrinth reflux channel 7.

[0047] The height of the inner bottom wall of the labyrinth reflux channel 7 gradually decreases from its inlet end to its reflux end, so that the water or electrolyte flowing into the labyrinth reflux channel 7 can smoothly flow back into the battery body 1.

[0048] like Figure 6-Figure 7 As shown, the pressure relief valve 42 includes a valve body 421, a connecting ring 422, a valve sleeve 423, a valve cover 424 and a valve cover limit cover 425. The valve body 421 is installed at the liquid adding end of the liquid adding channel 41, and is provided with a mounting hole 4211 connected to the liquid adding channel 41. The mounting hole is a stepped hole, including a first hole, a second hole and a third hole whose apertures increase in sequence toward the liquid adding end of the liquid adding channel 41. The connecting ring 422 is fixed on the inner wall of the first hole.

[0049] The valve sleeve 423 is coaxially arranged with the mounting hole 4211 and connected to the inner ring side of the connecting ring 422, and a first air outlet hole 4231 is provided on the upper side wall thereof; a valve cover 424 is provided at the other end of the valve sleeve 423 as a sealing sliding cover along the axial direction of the valve sleeve 423 to block or open the first air outlet hole 4231; a valve cover limiting cover 425 is fixed in the second hole and a gap H1 is provided between the valve cover 424 and a plurality of second air outlet holes are provided on the valve cover limiting cover 425.

[0050] When the first waterproof breathable sheet 32 ​​is blocked and the internal pressure of the battery body 1 increases, the gas pushes the valve cover 424 to slide along the sliding sleeve until the first air outlet 4231 can be connected with the mounting hole 4211, and the gas flows from the first air outlet 4231 to the mounting hole 4211 and is discharged from the second air outlet on the valve cover 424. In a specific embodiment, the first air outlet 4231 is a square hole with a hole size of 1-2mm×1-2mm. When the internal air pressure of the battery body 1 decreases, the external gas pushes the valve cover 424 to slide and block the first air outlet 4231, thereby achieving sealing and preventing the internal electrolyte from flowing out of the first air outlet 4231.

[0051] Specifically, the valve cover 424 and the valve sleeve 423 have an interference fit. On the one hand, when the internal pressure of the battery is too high, the first air outlet 4231 can be slid open to adjust the internal pressure of the battery and prevent the battery from swelling or rupture. On the other hand, it can play a sealing role. When the internal pressure of the battery is lower than the closing pressure of the pressure relief valve 42, the pressure relief valve 42 is closed to prevent the internal gas mist from leaking out, and also prevent the external air from entering the battery. In a specific embodiment, the measured opening pressure of the pressure relief valve 42 is 10kpa-15kpa, and the closing pressure is 3kpa-5kpa.

[0052] The pressure relief valve 42 also includes a liquid leakage prevention component 426, which includes a second waterproof breathable sheet 4261 and a second waterproof breathable sheet pressure cap 4262. The second waterproof breathable sheet 4261 is installed on the side of the valve cover limit cover 425 close to the liquid filling end of the liquid filling channel 41, and plays a role of ventilation and waterproofing to prevent the electrolyte carried in the gas from flowing out. The second waterproof breathable sheet pressure cap 4262 is installed in the third hole and has an interference fit with the third hole to limit the second waterproof breathable sheet 4261 to prevent the second waterproof breathable sheet 4261 from rising. The second waterproof breathable sheet pressure cap 4262 is provided with a plurality of third air outlet holes to facilitate gas discharge.

[0053] The first waterproof breathable sheet 32 ​​and the second waterproof breathable sheet 4261 are made of polytetrafluoroethylene and sodium chloride, which are mixed, pressed and baked at a certain temperature, and play the role of water isolation and exhaust, and have the characteristics of porous air permeability but hydrophobicity. During the use of the battery, it plays the effect of preventing the internal electrolyte from overflowing and the external liquid from penetrating, and its air permeability is conducive to maintaining the internal pressure of the battery stable.

[0054] The pressure relief valve 42 also includes a dustproof assembly 427, which includes a positioning pin 4271 and a dustproof cover 4272. A plurality of positioning holes are evenly spaced apart on the outer circumference of the corresponding mounting hole 4211 at the top of the valve body 421. The plurality of positioning pins 4271 correspond to the plurality of positioning holes one by one and one end of the positioning pins 4271 is positioned and connected in the positioning hole. The dustproof cover 4272 is a conical structure, which is fixed to the other end of the plurality of positioning pins 4271 and has a breathable gap H between the dustproof cover 4272 and the valve body 421. 2 The third air outlet is connected to the outside. The top surface of the second waterproof breathable sheet gland 4262 is flush with or lower than the top surface of the valve body 421. The dustproof component 427 can block dust to prevent dust from clogging the second waterproof breathable sheet 4261. The positioning hole can not only be used for positioning and plugging with the positioning pin 4271, but also can be used as a tooling insertion hole for tightening and loosening the valve body 421 when it is installed at the liquid filling end of the liquid filling channel 41.

[0055] The pressure relief valve 42 further includes a liquid baffle plate 428, one end of which is fixed to the inner wall of the mounting hole 4211 on the side of the corresponding valve sleeve 423 away from the liquid adding end of the liquid adding channel 41, and the other end is inclined in a direction away from the liquid adding end of the liquid adding channel 41 and is provided with an upper air channel 4281 that passes through the axial direction of the mounting hole 4211. The electrolyte gushing out during the shaking of the battery collides with the liquid baffle plate 428 and flows downward back into the battery cavity, preventing the electrolyte from impacting the valve cover 424 to slide open the valve cover 424, thereby preventing the electrolyte from contacting the second waterproof breathable sheet 4261 and causing the second waterproof breathable sheet 4261 to be blocked.

[0056] A sealing ring 43 is provided at the connection between the valve body 421 and the liquid adding channel 41. Specifically, the liquid adding channel 41 is a stepped hole with a decreasing aperture toward its liquid outlet end. The lower part of the valve body 421 is threadedly connected to the small aperture section of the stepped hole, and the upper part is connected to the large aperture section of the stepped hole. The sealing ring 43 is provided at the connection between the valve body 421 and the shoulder of the stepped hole. The sealing ring 43 is a sealing rubber ring, which is integrally formed with the valve body 421 during injection molding of the valve body 421.

[0057] See also Figure 8 A convex ring 411 is formed on the shoulder of the stepped hole, and the cross section of the convex ring 411 is a triangular structure, and the width of the triangular structure gradually decreases toward the liquid adding end, and the sealing ring 43 is pressed and sealed with the convex ring 411. Preferably, the width of the triangular structure is 0.5mm-1.0mm, and the height is 0.3mm-0.5mm.

[0058] See also Figure 1 The exhaust cover 2 includes an inner cover 21 and an outer cover 22. The inner cover 21 is set on the top opening of the battery body 1, and the outer cover 22 is set on the top of the inner cover 21 and fixed to the top wall of the battery body 1 by bolts. The edge portion where the inner cover 21 and the outer cover 22 are connected is connected by heat sealing and pressing to improve the bonding strength and enhance the sealing effect. The inner cover 21 and the outer cover 22 are buckled together to form the first exhaust channel 31, the second exhaust channel 5, the vent hole 6, the labyrinth reflux channel 7 and the liquid adding channel 41.

[0059] Working principle of the present invention:

[0060] During the operation of the battery, when the first waterproof breathable sheet 32 ​​of the first exhaust structure 3 can be used normally, the pressure relief valve 42 is sealed, and the gas generated inside the battery is discharged outward through the first exhaust channel 31. The first waterproof breathable sheet 32 ​​can block the electrolyte while being breathable to prevent the electrolyte from flowing out. At the same time, the gas generated inside can also flow from the liquid adding channel 41 to the first exhaust channel 31 through the second exhaust channel 5 for discharge. When the first waterproof breathable sheet 32 ​​is blocked, the second exhaust structure 4 is exhausted, and the gas generated inside the battery flows into the liquid adding channel 41 and is discharged by the pressure relief valve 42.

[0061] When the pressure relief valve 42 is sealed, the internal pressure of the battery is less than the external pressure, the valve cover 424 slides downward to have an interference fit with the valve sleeve 423 to achieve a sealed connection, the first air outlet 4231 cannot be connected to the mounting hole 4211, and the electrolyte cannot be discharged through the pressure relief valve 42. When the pressure relief valve 42 is venting, the internal pressure of the battery is greater than the external pressure, the internal gas lifts the valve cover 424, the first air outlet 4231 is connected to the mounting hole 4211, the gas can be discharged from the first air outlet 4231, and the electrolyte is blocked by the liquid baffle plate 428 and the second waterproof and breathable sheet 4261 and cannot be discharged through the pressure relief valve 42.

[0062] When the liquid adding channel 41 of the present invention is filled with liquid, the electrolyte flows downward from the liquid adding end to the liquid outlet end and then flows into the battery body 1; when exhausting, the gas inside the battery body 1 flows upward from the liquid outlet end to the pressure relief valve and is discharged through the pressure relief valve 42. By installing the pressure relief valve 42, the liquid adding channel 41 can be sealed and exhaust can be performed, thereby enhancing its functionality and reducing cost expenditure.

[0063] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0064] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A storage battery with a double exhaust structure, comprising a battery body (1) and an exhaust cover (2), wherein the battery body (1) has an open top, the exhaust cover (2) is arranged at the open top and is fixed to the battery body (1), and an exhaust structure is arranged inside the exhaust cover; characterized in that: The exhaust structure comprises a first exhaust structure (3) and a second exhaust structure (4) which are arranged at intervals; The first exhaust structure (3) comprises a first exhaust channel (31) and a first waterproof breathable sheet (32); the first exhaust channel (31) is opened inside the exhaust cover (2) and its air inlet end is connected to the inner cavity of the battery body (1), and its air outlet end is connected to the outside atmosphere; the first waterproof breathable sheet (32) is installed at the air outlet end of the first exhaust channel (31); The second exhaust structure (4) comprises a liquid adding channel (41) and a pressure relief valve (42); the liquid adding channel (41) is opened inside the exhaust cover (2) and its liquid adding end is connected to the outside atmosphere, and its liquid outlet end is connected to the inner cavity of the battery body (1); the pressure relief valve (42) is installed at the liquid adding end of the liquid adding channel (41).

2. A battery with a double exhaust structure according to claim 1, characterized in that: The exhaust structure further comprises a second exhaust channel (5) arranged in the exhaust cover (2), and two ends of the second exhaust channel (5) are respectively connected to the air inlet end of the first exhaust channel (31) and the liquid outlet end of the liquid adding channel (41).

3. A storage battery with a double exhaust structure according to claim 2, characterized in that: There are a plurality of exhaust structures, and mutually communicating vent holes (6) are provided between the second exhaust passages (5) of the plurality of exhaust structures.

4. A storage battery with a double exhaust structure according to claim 2, characterized in that: A plurality of the liquid adding channels (41) are provided, each of the liquid adding channels (41) is in communication with the second exhaust channel (5), and the pressure relief valve (42) is installed at the liquid adding end of each of the liquid adding channels (41).

5. A storage battery with a double exhaust structure according to claim 4, characterized in that: A plurality of labyrinth-type reflux channels (7) are also provided, and the plurality of labyrinth-type reflux channels (7) correspond one to one with the plurality of liquid adding channels (41). Each of the labyrinth-type reflux channels (7) is opened on the outer peripheral side of the liquid adding channel (41), and its inlet end is connected to the second exhaust channel (5), and the reflux end is respectively connected to the liquid outlet end of the corresponding liquid adding channel (41) to prevent the electrolyte from gushing out of the liquid adding channel (41).

6. A storage battery with a double exhaust structure according to claim 5, characterized in that: The height of the inner bottom wall of the labyrinth-type reflux channel (7) gradually decreases from its inlet end to its reflux end.

7. A storage battery with a double exhaust structure according to any one of claims 1 to 6, characterized in that: The pressure relief valve (42) comprises a valve body (421), a connecting ring (422), a valve sleeve (423), a valve cover (424) and a valve cover limiting cover (425); the valve body (421) is mounted on the inner wall of the liquid adding channel (41) close to the liquid adding end thereof, and is provided with a mounting hole (4211) communicating with the liquid adding channel (41); the connecting ring (422) is fixed on the inner wall of the mounting hole (4211) away from the liquid adding end of the liquid adding channel (41); The valve sleeve (423) is coaxially arranged with the mounting hole (4211) and one end of the valve sleeve is connected to the inner ring side of the connecting ring (422), and the other end is provided with a first air outlet (4231); the valve cover (424) is provided with a sealing sliding cover along the axial direction of the valve sleeve (423) at the other end thereof to block or open the first air outlet (4231); the valve cover limiting cover (425) is fixed on the inner wall of the mounting hole (4211) of the valve cover (424) on the side close to the liquid adding end of the liquid adding channel (41) and has a gap H1 between the valve cover (424), and a plurality of second air outlets are provided on the valve cover limiting cover (425).

8. A storage battery with a double exhaust structure according to claim 7, characterized in that: The pressure relief valve (42) further comprises a liquid leakage prevention component (426), wherein the liquid leakage prevention component (426) comprises a second waterproof breathable sheet (4261) and a second waterproof breathable sheet pressure cover (4262), wherein the second waterproof breathable sheet (4261) is mounted on a side of the valve cover limit cover (425) close to the liquid adding end of the liquid adding channel (41), and the second waterproof breathable sheet pressure cover (4262) is pressed on a side of the second waterproof breathable sheet (4261) close to the liquid adding end of the liquid adding channel (41), and is provided with a plurality of third air outlet holes.

9. A storage battery with a double exhaust structure according to claim 8, characterized in that: The pressure relief valve (42) also includes a dustproof component (427), and the dustproof component (427) includes a positioning pin (4271) and a dustproof cover (4272). The end of the valve body (421) close to the liquid filling end of the liquid filling channel (41) is circumferentially evenly spaced with a plurality of positioning holes corresponding to the outer circumference of the mounting hole (4211). The plurality of positioning pins (4271) correspond to the plurality of positioning holes one by one and one end is positioned and connected in the positioning hole; the dustproof cover (4272) is fixed to the other end of the plurality of positioning pins (4271) and has an air-permeable gap H2 between the dustproof cover (4272) and the valve body (421) so that the third air outlet is connected to the outside.

10. A storage battery with a double exhaust structure according to claim 9, characterized in that: The pressure relief valve (42) further comprises a liquid baffle plate (428), one end of which is fixed to the inner wall of the mounting hole (4211) corresponding to the valve sleeve (423) on the side away from the liquid adding end of the liquid adding channel (41), and the other end of which is inclined in a direction away from the liquid adding end of the liquid adding channel (41) and is provided with an upper air channel (4281) passing through the mounting hole (4211) in the axial direction.

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