CN215418490U

CN215418490U - Battery structure with good exhaust effect

Info

Publication number: CN215418490U
Application number: CN202121820778.9U
Authority: CN
Inventors: 童育林
Original assignee: Shaoguan Tongshi Power Technology Co ltd
Current assignee: Shaoguan Tongshi Power Technology Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-04
Anticipated expiration: 2031-08-05

Abstract

The utility model provides a battery structure with good exhaust effect, which comprises a storage battery box body, a battery box cover and a battery upper cover, wherein the battery box cover is arranged on an opening of the storage battery box body; the battery box cover and the upper cover are buckled to form a separation inner cavity, a plurality of mutually isolated separation unit grids are arranged in the separation inner cavity, and the separation unit grids are arranged corresponding to the battery units in the battery box body; the utility model has the advantages of difficult loss of electrolyte and good gas-liquid separation effect.

Description

Battery structure with good exhaust effect

Technical Field

The utility model relates to the technical field of storage batteries, in particular to a battery structure with a good exhaust effect.

Background

The electrolyte of the vehicle-mounted lead-acid storage battery is prepared by dilute sulfuric acid solution and water and concentrated sulfuric acid. The effect of annotating the liquid stopper is when the battery charges, need not to open the lid and just can discharge the hydrogen and the oxygen that produce, can carry out the fluid infusion to the battery through annotating the hole site that the liquid stopper corresponds simultaneously, opens and annotates the proportion and the temperature that the liquid stopper just can measure electrolyte, and in order to prevent that the gas that produces when the battery is inside to carry the acid mist that inside electrolyte formed directly to spill over, takes away a large amount of inside moisture of electrolyte, annotates the structure that the liquid stopper was equipped with the condensation backward flow more, reduces the loss of water.

However, in the conventional condensation backflow structure on the liquid filling plug, due to the limitation of the size of the liquid filling plug, the backflow efficiency is low, and therefore, a battery cover device which can exhaust gas and greatly improve the condensation backflow of acid mist is needed for solving the problems.

In order to solve the technical problem, a patent document with Chinese patent number CN202020463544.2 and publication number 2020.11.13 discloses a double-layer labyrinth acid-proof cover for a vehicle-mounted storage battery, which comprises a middle cover, the middle cover is covered on the opening of the storage battery, the top of the middle cover is covered with the upper cover, the middle cover and the upper cover are covered to form a sealed condensation inner cavity, a plurality of mutually isolated battery unit cells are arranged in the condensation inner cavity, a plurality of labyrinth baffles are vertically arranged in the battery unit cells and divide the interior of the battery unit cells into a winding labyrinth air guide condensation channel, the left side and the right side of the condensation inner cavity are respectively provided with a converging cavity, the two converging cavities are communicated through an air guide channel, each battery cell is provided with a bin air outlet communicated with the air guide channel, and an air outlet with an outer opening arranged on the side wall of the upper cover is arranged in each converging cavity; according to the utility model, a plurality of independent labyrinth type gas guide condensation channels opposite to the battery unit are constructed through the double-cover design, so that the condensation reflux efficiency is improved, and the service life of the battery is prolonged.

According to the technical scheme disclosed by the patent document, in a sealed condensation inner cavity formed by covering a middle cover and an upper cover, gas is discharged into a gas guide channel, a plurality of gas guide baffles for blocking the radial linear flow of the gas are radially arranged in the gas guide channel, the gas guide baffles are respectively and vertically fixed on the top surface of the middle cover and the bottom surface of the upper cover in a staggered manner, and communicated gaps are reserved between the gas guide baffles and the inner bottom surface of the gas guide channel respectively, so that the gas flow direction is in an up-and-down crossing manner.

However, the air guide baffle plates are arranged at intervals, so that accumulated liquid is formed between the upper air guide baffle plate and the lower air guide baffle plate by electrolyte, the air pressure in the condensation inner cavity is increased after the accumulated liquid is formed, the accumulated liquid is difficult to climb over the lower air guide baffle plate, the air pressure in the condensation inner cavity is continuously increased, when the air pressure can push the accumulated liquid to climb over the lower air guide baffle plate, and the electrolyte cannot flow back after crossing over the lower air guide baffle plate; meanwhile, when the storage battery is shaken or toppled and the like, the electrolyte enters the condensation inner cavity and passes over the lower air guide baffle plate, and the electrolyte can not flow back after passing over the lower air guide baffle plate; thus, the loss of electrolyte can be caused, and the service life of the storage battery is influenced; meanwhile, the air guide channel in the scheme is formed by buckling the air guide baffles on the upper cover and the lower cover in a staggered manner, so that the space in the air guide channel is insufficient, and the condensation effect is poor; in addition, the left side and the right side in the upper cover are independent, if the exhaust port on one side is blocked, the gas on the side cannot be discharged, and the upper cover on the side is raised due to overhigh air pressure, so that the upper cover and the middle cover are connected unstably, and the leakage hidden danger exists.

Disclosure of Invention

The utility model provides a battery structure with good exhaust effect, and electrolyte is not easy to run off by using the structure of the utility model, and the gas-liquid separation effect is good.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides an effectual battery structure exhausts, includes battery box, battery case lid and battery upper cover, and the battery case lid should be established on battery box opening, and the inside battery unit that is equipped with a plurality of cells and sets up of battery box, the battery case lid is reserved has the injection through-hole that is used for injecting electrolyte to the cell, the top lid of battery case lid has closed the upper cover.

The battery box comprises a battery box cover and an upper cover, wherein the battery box cover is arranged in the battery box body, the upper cover is buckled with the battery box cover to form a separation inner cavity, a plurality of mutually isolated separation unit lattices are arranged in the separation inner cavity, and the separation unit lattices correspond to the positions of battery units in the battery box body.

The battery box cover is provided with an injection through hole communicated with the inside of the battery box body, the injection through hole is formed by upwards extending from the battery box cover, the upper cover is provided with a cover hole corresponding to the injection through hole, the top surface of the side wall of the injection through hole is abutted to the top surface of the side wall of the cover hole, and the side wall of the injection through hole is provided with two buffer ports symmetrically arranged.

The injection through hole comprises a first arc part and a second arc part, the first arc part is positioned at the upper sides of the two buffer openings, and the second arc part is positioned at the lower sides of the two buffer openings; the cover hole is arranged corresponding to the first arc part; and the upper cover forms a backflow opening at the position of the cover hole corresponding to the second arc part.

A first closed cavity is formed in one side, corresponding to the same battery unit, of the separation unit grid on one side of the battery box cover, and a first closed cavity is formed by the side wall of the separation unit grid on the battery box cover and the second arc part; more than one buffer through hole communicated with the storage battery box body is arranged in the first closed cavity.

The battery box cover is provided with a plurality of lower bus plates on one side of the separation unit grid, the upper cover is provided with a plurality of upper bus plates corresponding to the lower bus plates, the battery box cover and the upper cover are in butt joint through the top surfaces of the upper bus plates and the top surfaces of the lower bus plates to form a roundabout bus passage, and the separation unit grid is provided with a shunt exhaust port on one side of the upper cover; the confluence channel at one side of the upper cover is communicated with the separation cell at the other side of the upper cover through the shunt exhaust port; the confluence channel at one side of the battery box cover is isolated from the separation cell at the position far away from the middle of the battery box cover; the lower confluence plate is provided with a liquid backflow port on one side of the separation unit lattice close to the middle position, and the separation unit lattice close to the middle position is communicated with the backflow confluence channel through the liquid backflow port.

Peripheral baffles are respectively arranged on one side of a confluence channel on the battery box cover and one side of the confluence channel on the upper cover, exhaust valves are respectively arranged on the two sides of the confluence channel on the upper cover, and exhaust cavities are respectively formed on the two sides of the shunting cavity by the upper cover and the battery box cover through an upper confluence plate, a lower confluence plate and the peripheral baffles; the exhaust cavity is communicated with an opening on one side of the confluence channel, which is far away from the separation unit grids; the height of the bottom surface of one side, far away from the injection through hole, of the battery box cover is higher than that of the bottom surface of one side, close to the injection through hole, of the battery box cover, the height of the bottom surface of one side, far away from the injection through hole, of the battery box cover is gradually reduced towards one side, close to the injection through hole, of the battery box cover, and the height of the bottom surface of the outlet end of the confluence channel is higher than that of the bottom surface of the inlet end.

And the gas in the storage battery box body is discharged from the exhaust valve to the separation inner cavity after sequentially passing through the injection through hole, the separation unit lattice, the confluence channel and the exhaust cavity.

According to the arrangement, after the liquid injection into the storage battery box body is completed, acid mist generated by the battery unit in the storage battery box body enters the separation inner cavity through the injection through hole and the buffer through hole to be condensed; the acid mist entering the first closed cavity from the buffer through hole enters the cover hole from the first closed cavity through the backflow opening, then enters the injection through hole, leaves the injection through hole from the buffer opening together with the acid mist generated in the injection through hole, and then enters the zigzag labyrinth-shaped confluence channel in the separation unit lattice through the flow dividing exhaust port on the upper confluence plate, so that the stroke of the acid mist in the condensation inner cavity is increased, and the condensation efficiency of the acid mist is improved; finally, the gas enters the exhaust cavity from the confluence channel and is exhausted out of the condensation inner cavity through the exhaust valve; therefore, acid mist in the shunting unit grids can only enter the confluence channel through the shunting exhaust port on the upper confluence plate, if part of electrolyte is left in the separation unit grids and the confluence channel on one side of the battery box cover, and the height of one side, far away from the injection through hole, of the bottom surface of the battery box cover is higher than that of one side, close to the injection through hole, of the bottom surface of the outlet end of the confluence channel, and the height of the bottom surface of the outlet end of the confluence channel enters the height of the bottom surface of the end, so that the electrolyte in the separation unit grids on one side of the battery box cover and the electrolyte in the confluence channel can flow back under the action of gravity, and the electrolyte in the confluence channel enters the separation unit grids in the middle position through the return port of the lower confluence plate and finally flows back to the injection hole; the electrolyte has better backflow effect from the confluence channel; therefore, the confluence channel is formed by abutting the upper confluence plate and the lower confluence plate, so that the confluence channel has a larger space, and the whole confluence channel forms a channel structure instead of a staggered gap structure, so that gas is discharged through the upper confluence channel, and the electrolyte flows back through the lower confluence channel, thereby improving the gas-liquid separation effect, improving the condensation and backflow efficiency of the electrolyte and reducing the loss of the electrolyte; meanwhile, the confluence channel on one side of the upper cover is communicated with the separation unit on the other side of the upper cover, and the confluence channel on one side of the battery box cover is isolated from the separation unit lattice on the middle position of the battery box cover, so that acid mist can only flow in the confluence channel on one side of the upper confluence plate, electrolyte is not easy to enter the confluence channel from the separation unit lattice on one side of the battery box cover, and the gas-liquid separation effect is good after the electrolyte overflows.

Furthermore, a lower closed baffle extending towards the injection through hole is arranged on the side wall of the separation unit lattice of the battery box cover close to the buffer port on one side, an upper closed baffle is arranged on the upper cover corresponding to the lower closed baffle, a second closed cavity is formed by the separation unit lattice on the battery box cover and the side wall of the upper cover, the upper closed baffle, the lower closed baffle and the side wall of the injection through hole, and the second closed cavity is communicated with the injection through hole through the buffer port; above setting, the closed chamber of second overflows for electrolyte and provides the buffering space to electrolyte after overflowing can get into the injection through-hole from the buffering mouth, and the battery cell flows back fast.

Furthermore, a flow blocking channel is arranged between an outlet of the confluence channel on the upper cover in the gas flowing direction and the exhaust cavity, the flow blocking channel is formed by intervals among the peripheral baffle plate, the upper confluence plate and the lower confluence plate, an inlet of the flow blocking channel is communicated with the outlet of the confluence channel and is arranged in a winding way, and an outlet of the flow blocking channel is communicated with the exhaust cavity; the flow-resisting baffle plates are arranged in the flow-resisting channel, the flow-resisting baffle plates are obliquely arranged on two opposite side walls of the flow-resisting channel towards the middle position of the separation inner cavity respectively, and the flow-resisting baffle plates on the two side walls are arranged in a staggered mode; a flow blocking channel is correspondingly arranged on the battery box cover and the flow blocking channel on the upper cover, a peripheral baffle is correspondingly arranged in the flow blocking channel on the battery box cover, a lower confluence plate is arranged on the battery box cover and corresponds to the upper confluence plate, a flow blocking baffle is correspondingly arranged in the flow blocking channel on the battery box cover, the flow blocking baffles are respectively obliquely arranged on two opposite side walls of the flow blocking channel towards the middle position of the separation inner cavity, and the flow blocking baffles on the two side walls are arranged in a staggered mode; above setting, because the choked flow baffle sets up to the intermediate position slope of separation inner chamber respectively for form the contained angle between choked flow baffle and the choked flow passageway, contained angle opening direction and acid mist flow direction opposite in the choked flow passageway, thereby the choked flow baffle can play better effect of blockking to flowing out electrolyte from the conflux channel.

Further, the buffer port is formed by sinking downwards along the side wall from the upper side opening of the injection through hole; the lower opening of the injection through hole is provided with a buffer inclined plane which is formed by extending from the side surface of the injection through hole to the inner side and downwards, and the lowest end of the buffer port is higher than the buffer inclined plane; thus, the electrolyte is not easy to overflow from the injection through hole.

Furthermore, reinforcing ribs are arranged on one side of the bottom surface of the battery box cover corresponding to the side walls of the battery units, guide pieces are symmetrically arranged on two sides of each reinforcing rib respectively, and the two guide pieces are gradually inclined from the bottom to the direction of the reinforcing ribs and are arranged corresponding to the side walls of the battery units; above setting, in the assembly battery in-process, when battery case lid lock is on battery case lid opening, because two guides incline gradually and correspond the lateral wall setting of battery unit respectively from the bottom to the strengthening rib direction, the guide can play the spacing effect of direction to the lateral wall of battery unit, and battery case lid is difficult for controlling to rock behind the lock simultaneously.

Furthermore, a terminal through hole for arranging a terminal is reserved on the battery box cover; the terminal is provided with a battery anode and cathode interface for connecting the anode and cathode of the battery, the bottom end of the terminal is arranged in the terminal through hole, and the terminal is fixed with the connecting terminal through hole at the upper side of the battery box cover; the bottom of the terminal extends out of the bottom of the terminal through hole and then extends outwards and upwards to form a riveting part which is riveted on the outer side wall of the bottom of the terminal through hole; like this, the upside of terminal passes through hot melt fixed connection battery case lid, and the terminal downside passes through the riveting portion riveting on terminal through-hole bottom lateral wall, and the terminal passes through upside and downside fixed connection battery case lid respectively to it is more firm to make terminal and battery case lid be connected.

Furthermore, the height of the top surface of the peripheral baffle plate is respectively equal to that of the top surface of the upper bus plate, the height of the top surface of the peripheral baffle plate is equal to that of the top surface of the lower bus plate, the height of the top surface of the flow-resisting baffle plate is respectively lower than that of the top surface of the peripheral baffle plate, the height of the top surface of the flow-resisting baffle plate is lower than that of the top surface of the upper bus plate, and the height of the top surface of the flow-resisting baffle plate is lower than that of the top surface of the lower bus plate; above setting, because choked flow baffle's top surface forms the clearance with peripheral baffle respectively, the top surface of going up cylinder manifold, lower cylinder manifold, gaseous can flow toward the exhaust cavity direction from this clearance, and electrolyte is difficult for flowing toward the exhaust cavity direction from this clearance, has further improved gas-liquid separation's effect.

Furthermore, the height of the bottom surface of the outlet of the flow resisting channel is higher than that of the bottom surface of the inlet of the flow resisting channel, and the height of the bottom surface of the outlet of the flow resisting channel gradually decreases towards the inlet of the flow resisting channel; through the arrangement, the bottom surface of the outlet of the flow blocking channel is higher than that of the inlet of the flow blocking channel, so that the gas-liquid separation effect and the backflow efficiency are further improved.

Further, the upper cover is provided with two converging channels, the middle position of the upper cover is provided with a separation plate, the separation plate is arranged between the two converging channels, the two converging channels are symmetrically arranged relative to the separation plate, the separation plate is provided with a gas flow distribution port, the gas flow distribution port is communicated with the flow distribution exhaust port and the converging channels, and the gas flow distribution port is arranged at the middle position of the upper cover, so that acid mist passing through the gas exhaust port from the cover hole is distributed through the gas flow distribution port, and the gas flow distribution effect is good.

Furthermore, the battery units are correspondingly provided with pole groups, each pole group consists of a plurality of pole plates and busbars welded on the pole plates, each pole group is correspondingly provided with a positive busbar and a negative busbar, wall penetrating holes for welding the positive busbars and the negative busbars in the adjacent battery units are reserved on the side walls between the adjacent battery units, and the positive busbars and the negative busbars in the adjacent battery units are electrically connected in the wall penetrating holes after being pressed; when the bus bars are pressed, one side of each bus bar, which is far away from the through-wall hole, is extruded towards the through-wall hole, so that the two bus bars deform towards the through-wall hole until the two bus bars are contacted and electrically connected; therefore, the pole group has good electrical connection effect, and meanwhile, the electrolytes in the adjacent battery units are not easy to contact with each other, so that short circuit is caused.

Drawings

Fig. 1 is a schematic structural view of a battery case cover and an upper cover according to the present invention.

Fig. 2 is a partial side view of the battery case cover according to the present invention.

Fig. 3 is a partial structural view of the terminal of the present invention disposed in the terminal through hole.

Fig. 4 is a schematic bottom view of the terminal of the present invention disposed in the terminal through hole.

FIG. 5 is a schematic view of the structure of the separation unit of the present invention.

Fig. 6 is a schematic view of a partial structure of the battery case cover fastened to the battery case body according to the present invention.

Fig. 7 is a schematic structural view of a choke passage in a battery case cover according to the present invention.

Fig. 8 is a partial connection view of the upper bus bar and the lower bus bar when the upper cover and the battery case cover are fastened in the present invention.

Fig. 9 is a schematic structural view illustrating the connection of bus bars between two adjacent battery cells according to the present invention.

Fig. 10 is a schematic partial cross-sectional view at C-C in fig. 9.

Reference numerals:

1-battery box cover, 11-separation unit grid, 12-injection through hole, 121-first arc part, 122-second arc part, 123-buffer port, 124-buffer inclined plane, 13-first closed cavity, 131-buffer through hole, 14-lower junction plate, 141-liquid reflux port, 15-shunt exhaust port, 16-lower closed baffle, 17-reinforcing rib, 171-guide piece and 18-terminal through hole.

2-upper cover, 21-cover hole, 211-reflux opening, 22-upper confluence plate, 23-exhaust valve, 24-upper closing baffle, 25-partition plate and 26-gas shunt port.

3-separator, 30-cell, 31-pole group, 32-pole bus bar, 33-through-wall hole.

41-confluence channel, 42-exhaust cavity, 43-second closed cavity, 44-flow-resisting channel and 441-flow-resisting baffle.

5-peripheral baffles.

6-terminal, 61-riveting part and 62-battery anode and cathode interface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-10, a battery structure with good exhaust effect includes a battery box body, a battery box cover 1 and a battery upper cover 2, wherein the battery box cover 1 is arranged on an opening of the battery box body, a plurality of battery units 30 arranged in a cell are arranged in the battery box body, an injection through hole 12 for leading out a positive electrode interface and a negative electrode interface of the battery and for injecting electrolyte into the cell is reserved on the battery box cover 1, and the top of the battery box cover 1 is covered with the upper cover 2; wherein A is the flowing direction of the gas in the upper cover; and B is the backflow direction of the electrolyte on the battery box cover.

The battery box cover 1 and the upper cover 2 are buckled to form a separation inner cavity, a plurality of mutually isolated separation unit lattices 11 are arranged in the separation inner cavity, and the separation unit lattices 11 are arranged corresponding to the positions of the battery units 30 in the storage battery box body.

The battery box cover 1 is provided with an injection through hole 12 communicated with the inside of the battery box body, the injection through hole 12 is formed by extending upwards from the battery box cover 1, the upper cover 2 is provided with a cover hole 21 corresponding to the injection through hole 12, the top surface of the side wall of the injection through hole 12 is abutted to the top surface of the side wall of the cover hole 21, and the side wall of the injection through hole 12 is provided with two buffer ports 123 symmetrically arranged.

The injection through hole 12 comprises a first arc part 121 and a second arc part 122, the first arc part 121 is positioned at the upper side of the two buffer openings 123, and the second arc part is positioned at the lower side of the two buffer openings 123; the cover hole 21 is arranged corresponding to the first arc part 121; the upper cover 2 forms a return opening 211 at the cover hole 21 corresponding to the second circular arc portion 122.

A first closed cavity 13 is formed in one side, corresponding to the same battery unit 30, of the separation cell 11 on one side of the battery box cover 1, and the side wall of the separation cell 11 on the battery box cover 1 and the second arc part 122 form the first closed cavity 13; more than one buffer through hole 131 communicated with the storage battery box body is arranged in the first closed cavity 13.

A plurality of lower bus plates 14 are arranged on one side of the separation cell 11 of the battery box cover 1, a plurality of upper bus plates 22 are arranged on the upper cover 2 corresponding to the lower bus plates 14, a roundabout bus duct 41 is formed between the battery box cover 1 and the upper cover 2 through the top surfaces of the upper bus plates 22 and the top surfaces of the lower bus plates 14 in an abutting mode, and a shunt exhaust port 15 is formed in one side of the upper cover 2 of the separation cell 11; the confluence passage 41 at one side of the upper cover 2 is communicated with the separation unit cell 11 at the other side of the upper cover 2 through the shunt exhaust port 15; the collecting channel 41 on the battery case cover 1 side is isolated from the separation cell 11 far from the middle position on the battery case cover 1; the lower bus bar 14 is provided with a liquid return port 141 on one side of the separation unit cell 11 near the middle position, and the separation unit cell 11 near the middle position is communicated with the bus duct 41 through the liquid return port 141.

Peripheral baffles 5 are respectively arranged on one side of a confluence channel 41 on the battery box cover 1 and one side of the confluence channel 41 on the upper cover 2, exhaust valves 23 are respectively arranged on two sides of the confluence channel 41 on the upper cover 2, and exhaust cavities 42 are respectively formed on two sides of the shunting cavity by the upper cover 2 and the battery box cover 1 through an upper confluence plate 22, a lower confluence plate 14 and the peripheral baffles 5; the exhaust cavity 42 is communicated with an opening on one side of the confluence channel 41, which is far away from the separation unit cell 11; as shown in fig. 2 and 7, the height of the bottom surface of the battery case cover 1 on the side far from the injection through hole 12 is higher than the height of the bottom surface of the battery case cover on the side near the injection through hole 12, the height of the bottom surface of the battery case cover 1 on the side far from the injection through hole 12 is gradually reduced toward the side near the injection through hole 12, and the height of the bottom surface of the outlet end of the confluence channel 41 is higher than the height of the bottom surface of the inlet end.

The gas in the accumulator box body is discharged out of the separation inner cavity from the exhaust valve 23 after sequentially passing through the injection through hole 12, the separation unit cell 11, the confluence channel 41 and the exhaust cavity.

With the arrangement, after the liquid injection into the storage battery box body is completed, acid mist generated by the battery unit 30 in the storage battery box body enters the separation inner cavity through the injection through hole 12 and the buffer through hole 131 for condensation; the acid mist entering the first closed cavity 13 from the buffer through hole 131 enters the cover hole 21 from the first closed cavity 13 through the backflow opening 211, then enters the injection through hole 12, leaves the injection through hole 12 from the buffer opening 123 together with the acid mist generated in the injection through hole 12, and then enters the labyrinth-shaped confluence channel 41 arranged in a winding manner through the diversion exhaust port 15 on the upper confluence plate 22 in the separation unit cell 11, so that the stroke of the acid mist in the condensation cavity is increased, and the condensation efficiency of the acid mist is improved; finally, the gas enters the exhaust cavity from the confluence channel 41 and is exhausted out of the condensation cavity through the exhaust valve 23; thus, the acid mist in the shunting cells can only enter the confluence channel 41 through the shunting exhaust ports 15 on the upper confluence plates 22, if part of the electrolyte stays in the separation cells 11 and the confluence channel 41 on one side of the battery case cover 1, and because the height of the bottom surface of the battery case cover 1 on the side far away from the injection through holes 12 is higher than that of the bottom surface on the side close to the injection through holes 12, the height of the bottom surface of the outlet end of the confluence channel 41 enters the height of the bottom surface of the end, so that the electrolyte in the separation cells 11 and the confluence channel 41 on one side of the battery case cover 1 can flow back under the action of gravity, and the electrolyte in the confluence channel 41 enters the separation cells 11 at the middle position through the return ports 141 of the lower confluence plates and finally flows back to the injection holes 12; in this embodiment, the confluence channels 41 on the same straight line are confluence channels on the same straight line in the left-right direction, because the height of the bottom surface of one side of the battery box cover, which is far away from the injection through hole, is higher than the height of the bottom surface of one side of the battery box cover, which is close to the injection through hole, and the height of the bottom surface of one side of the battery box cover, which is far away from the injection through hole, is gradually reduced towards one side, which is close to the injection through hole, and the height of the bottom surface of the outlet end of the confluence channel is higher than the height of the bottom surface of the inlet end of the confluence channel, the backflow effect of the electrolyte from the confluence channels 41 is better; in this way, because the confluence channel 41 is formed by abutting the upper bus plate 22 and the lower bus plate 14, the confluence channel 41 has a larger space, and the whole confluence channel 41 forms a channel structure instead of a staggered gap structure, so that gas is discharged through the upper confluence channel 41, and the electrolyte flows back through the lower confluence channel 41, thereby improving the gas-liquid separation effect, improving the efficiency of the condensation and backflow of the electrolyte, and reducing the loss of the electrolyte; meanwhile, as the confluence channel on one side of the upper cover 2 is communicated with the separation cell 11 on the other side of the upper cover 2, and the confluence channel 41 on one side of the battery box cover 1 is isolated from the separation cell 11 far away from the middle position of the battery box cover 1, acid mist can only flow through the confluence channel 41 on one side of the upper confluence plate 22, electrolyte is not easy to enter the confluence channel 41 from the separation cell 11 on one side of the battery box cover 1, and the gas-liquid separation effect is good after the electrolyte overflows.

A lower closing baffle 16 extending towards the injection through hole 12 is arranged on the side wall of the separation cell 11 of the battery box cover 1 close to the buffer port 123 on one side, an upper closing baffle 24 is arranged on the upper cover 2 corresponding to the lower closing baffle 16, a second closing cavity 43 is formed by the side walls of the separation cell 11 on the battery box cover 1 and the upper cover 2, the upper closing baffle 24, the lower closing baffle 16 and the injection through hole 12, and the second closing cavity 43 is communicated with the injection through hole 12 through the buffer port 123; with the above arrangement, the second closed chamber 43 provides a buffer space for the electrolyte to overflow, and the overflowed electrolyte can enter the injection through hole 12 from the buffer port 123 and rapidly flow back to the battery cell 30.

A flow blocking channel 44 is arranged between an outlet of the upper cover upper confluence channel 41 in the gas flowing direction and the exhaust cavity 42, the flow blocking channel 44 is formed by intervals among the peripheral baffle 5, the upper confluence plate 22 and the lower confluence plate 14, an inlet of the flow blocking channel 44 is communicated with an outlet of the confluence channel 41 and is arranged in a winding way, and an outlet of the flow blocking channel 44 is communicated with the exhaust cavity 42; the flow-resisting baffles 441 are arranged in the flow-resisting channel 44, the flow-resisting baffles 441 are respectively obliquely arranged on two opposite side walls of the flow-resisting channel 44 towards the middle position of the separation inner cavity, the flow-resisting baffles 441 on the two side walls are arranged in a staggered manner, the flow-resisting channel 44 on the battery box cover 1 and the flow-resisting channel 44 on the upper cover 2 are correspondingly arranged, the peripheral baffle 5 is correspondingly arranged in the flow-resisting channel 44 on the battery box cover 1, the lower confluence 14 plate is arranged on the battery box cover 1 and corresponds to the upper confluence plate 22, the flow-resisting baffles 441 are also correspondingly arranged in the flow-resisting channel 44 on the battery box cover 1, the flow-resisting baffles 441 are respectively obliquely arranged on the two opposite side walls of the flow-resisting channel 44 towards the middle position of the separation inner cavity, and the flow-resisting baffles 441 on the two side walls are arranged in a staggered manner; due to the arrangement, the flow blocking baffle plates 441 are respectively arranged in an inclined manner towards the middle positions of the separating inner cavities, so that an included angle is formed between the flow blocking baffle plates 441 and the flow blocking channel 44, an angle formed by the flow blocking baffle plates 441 on the upper cover and the flow direction of acid mist in the flow blocking channel 44 on the upper cover is larger than 90 degrees, so that the inclined direction of the flow blocking baffle plates 441 is opposite to the flow direction of the acid mist in the flow blocking channel 44, and the flow blocking baffle plates 441 can well block the electrolyte flowing out of the confluence channel 41.

The flow-resisting channel 44 on the box cover corresponding to the upper cover is correspondingly provided with flow-resisting channels, the flow-resisting channel 44 on the box cover is formed by intervals among the peripheral baffle 5, the upper confluence plate 22 and the lower confluence plate 14, the inlet of the flow-resisting channel 44 is communicated with the outlet of the confluence channel 41 and is arranged in a winding way, and the outlet of the flow-resisting channel 44 is communicated with the exhaust cavity 42; the flow-resisting baffles 441 are arranged in the flow-resisting channel 44, the flow-resisting baffles 441 are respectively obliquely arranged on two opposite side walls of the flow-resisting channel 44 towards the middle position of the separation inner cavity, the flow-resisting baffles 441 on the two side walls are arranged in a staggered manner, the flow-resisting baffles 441 on the case cover are arranged corresponding to the flow-resisting baffles 441 on the upper cover, namely, an angle formed by the flow-resisting baffles 441 on the case cover and the backflow direction of the electrolyte in the flow-resisting channel 44 on the case cover is smaller than 90 degrees, so that the backflow of the electrolyte is facilitated; after the upper cover is covered on the box cover, the top surface of the peripheral baffle 5 on the upper cover is abutted with the top surface of the peripheral baffle 5 on the box cover.

The buffer port 123 is formed by sinking downwards along the side wall from the upper opening of the injection through hole 12; the lower opening of the injection through hole 12 is provided with a buffer inclined plane 124, the buffer inclined plane 124 is formed by extending from the side surface of the injection through hole 12 to the inner side and downwards, and the lowest end of the buffer port 123 is higher than the buffer inclined plane 124; thus, the electrolyte is less likely to overflow from the injection through-hole 12.

A reinforcing rib 17 is arranged on one side of the bottom surface of the battery box cover 1 corresponding to the side wall of the battery unit 30, two sides of the reinforcing rib 17 are respectively and symmetrically provided with a guide member 171, and the two guide members 171 are respectively inclined gradually from the bottom to the direction of the reinforcing rib 17 and are arranged corresponding to the side wall of the battery unit 30; the adjacent battery cells 30 are isolated from each other by the partition plate 3, as shown in fig. 6, when the battery box cover is fastened to the battery box body, the two guide members 171 are arranged corresponding to the partition plate 3; above setting, in the assembly battery in-process, when battery case lid 1 lock is on battery case lid 1 opening, because two guides 171 respectively from the bottom to the setting of the lateral wall that the strengthening rib 17 direction slopes gradually and correspond battery unit 30, guides 171 can play the spacing effect of direction to battery unit 30's lateral wall, and battery case lid 1 is difficult for controlling to rock behind the lock simultaneously.

A terminal through hole 18 for arranging a terminal is reserved on the battery box cover 1; the terminal 6 is provided with a battery anode and cathode interface 62 for connecting the anode and cathode of the battery; the bottom end of the terminal 6 is disposed in the terminal through hole 18, and the terminal 6 fixes the connection terminal through hole 18 on the upper side of the battery case lid 1; the bottom of the terminal 6 extends out of the bottom of the terminal through hole 18 and then extends upwards to form a riveting part 61, and the riveting part 61 is riveted on the outer side wall of the bottom of the terminal through hole 18; in this way, the upper side of the terminal 6 is fixedly connected with the battery case cover 1 through hot melting, the lower side of the terminal 6 is riveted on the outer side wall of the bottom of the terminal through hole 18 through the riveting part 61, and the terminal 6 is fixedly connected with the battery case cover 1 through the upper side and the lower side respectively, so that the terminal 6 is more stably connected with the battery case cover 1; in the present embodiment, the terminal 6 is fixed to the connection terminal through hole 18 on the upper side of the battery case lid 1 by thermal fusion.

The height of the top surface of the peripheral baffle plate 5 is equal to that of the top surface of the upper bus plate 22, the height of the top surface of the peripheral baffle plate 5 is equal to that of the top surface of the lower bus plate 14, the height of the top surface of the flow blocking baffle plate 441 is lower than that of the top surface of the peripheral baffle plate 5, the height of the top surface of the flow blocking baffle plate 441 is lower than that of the top surface of the upper bus plate 22, and the height of the top surface of the flow blocking baffle plate is lower than that of the top surface of the lower bus plate 14; with the above arrangement, since the top surfaces of the baffle plates 441 and the top surfaces of the peripheral baffle plates 5, the upper bus plate 22, and the lower bus plate 14 form gaps, gas can flow from the gaps to the exhaust cavity 42, and electrolyte is not likely to flow from the gaps to the exhaust cavity 42, which further improves the gas-liquid separation effect.

As shown in fig. 1 and 7, the height of the bottom surface of the outlet of the choke passage 44 is higher than the height of the bottom surface of the inlet of the choke passage 44 and the height of the bottom surface of the outlet of the choke passage 44 gradually decreases toward the inlet of the choke passage 44; with the above arrangement, the height of the bottom surface of the outlet of the choked flow passage 44 is higher than that of the bottom surface of the inlet of the choked flow passage 44, so that the gas-liquid separation effect and the reflux efficiency are further improved.

As shown in fig. 1, two converging passages 41 are arranged on the upper cover 2, a partition plate is arranged in the middle of the upper cover, a partition plate 25 is arranged between the two converging passages 41, the two converging passages 41 are symmetrically arranged relative to the partition plate 25, a gas diversion port 26 is arranged on the partition plate 25, and the gas diversion port 26 is communicated with the diversion exhaust port 15 and the converging passage 41.

As shown in fig. 9-10, a pole group 31 is correspondingly disposed in the battery unit 30, the pole group is composed of a plurality of pole plates 310 and bus bars 32 welded on the pole plates, each pole group 31 is correspondingly provided with a positive bus bar 32 and a negative bus bar 32, a wall penetrating hole 33 for welding the positive bus bar 32 and the negative bus bar 32 in the adjacent battery unit 30 is reserved on a side wall between the adjacent battery units 30, and the positive bus bar 32 and the negative bus bar 32 in the adjacent battery units 30 are electrically connected through the wall penetrating hole 33 after being pressed; when the bus bars 32 are pressed, one side of the bus bar 32, which is far away from the through-wall hole 33, is pressed towards the through-wall hole 33, so that the two bus bars 32 deform towards the through-wall hole 33 until the two bus bars 32 are electrically connected in a contact manner; thus, the electrical connection between the electrode group 31 and the electrode group 31 is good, and the electrolytes in the adjacent battery cells 30 are not easily contacted with each other to cause a short circuit.

Claims

1. A battery structure with good exhaust effect comprises a storage battery box body, a battery box cover and a battery upper cover, wherein the battery box cover is arranged on an opening of the storage battery box body, a plurality of battery units arranged in unit cells are arranged in the storage battery box body, injection through holes for injecting electrolyte into the unit cells are reserved on the battery box cover, and the top of the battery box cover is covered with the upper cover;

the method is characterized in that: the battery box cover and the upper cover are buckled to form a separation inner cavity, a plurality of mutually isolated separation unit grids are arranged in the separation inner cavity, and the separation unit grids are arranged corresponding to the battery unit positions in the battery box body;

the battery box cover is provided with an injection through hole communicated with the inside of the battery box body, the injection through hole is formed by extending upwards from the battery box cover, the upper cover is provided with a cover hole corresponding to the injection through hole, the top surface of the side wall of the injection through hole is abutted against the top surface of the side wall of the cover hole, and the side wall of the injection through hole is provided with two buffer ports which are symmetrically arranged;

the injection through hole comprises a first arc part and a second arc part, the first arc part is positioned at the upper sides of the two buffer openings, and the second arc part is positioned at the lower sides of the two buffer openings; the cover hole is arranged corresponding to the first arc part; the upper cover forms a backflow opening at the position of the cover hole corresponding to the second arc part;

a first closed cavity is formed in one side, corresponding to the same battery unit, of the separation unit grid on one side of the battery box cover, and a first closed cavity is formed by the side wall of the separation unit grid on the battery box cover and the second arc part; more than one buffer through hole communicated with the storage battery box body is arranged in the first closed cavity;

the battery box cover is provided with a plurality of lower bus plates on one side of the separation unit grid, the upper cover is provided with a plurality of upper bus plates corresponding to the lower bus plates, the battery box cover and the upper cover are in butt joint through the top surfaces of the upper bus plates and the top surfaces of the lower bus plates to form a roundabout bus passage, and the separation unit grid is provided with a shunt exhaust port on one side of the upper cover; the confluence channel at one side of the upper cover is communicated with the separation cell at the other side of the upper cover through the shunt exhaust port; the confluence channel at one side of the battery box cover is isolated from the separation cell at the position far away from the middle of the battery box cover; the lower bus board is provided with a liquid backflow port at one side of the separation unit lattice close to the middle position, and the separation unit lattice close to the middle position is communicated with the bus channel through the liquid backflow port;

peripheral baffles are respectively arranged on one side of a confluence channel on the battery box cover and one side of a confluence channel on the upper cover, exhaust valves are respectively arranged on the two sides of the confluence channel on the upper cover, and exhaust cavities are respectively formed on the two sides of the shunting cavity by the upper cover and the battery box cover through an upper confluence plate, a lower confluence plate and the peripheral baffles; the exhaust cavity is communicated with an opening on one side of the confluence channel, which is far away from the separation unit grids; the height of the bottom surface of one side of the battery box cover, which is far away from the injection through hole, is higher than that of the bottom surface of one side of the battery box cover, which is close to the injection through hole, and the height of the bottom surface of one side of the battery box cover, which is far away from the injection through hole, is gradually reduced towards one side close to the injection through hole; the bottom surface of the outlet end of the confluence channel is higher than that of the inlet end;

2. The battery structure with good exhaust effect according to claim 1, characterized in that: the battery box cover is characterized in that a lower closed baffle extending towards the injection through hole is arranged on the side wall of the separation unit lattice close to the buffer hole on one side, an upper cover is provided with an upper closed baffle corresponding to the lower closed baffle, the side wall of the separation unit lattice on the battery box cover and the upper cover, the side wall of the upper closed baffle, the side wall of the lower closed baffle and the side wall of the injection through hole form a second closed cavity, and the second closed cavity is communicated with the injection through hole through the buffer hole.

3. The battery structure with good exhaust effect according to claim 1, characterized in that: a flow blocking channel is arranged between an outlet of the confluence channel on the upper cover in the gas flowing direction and the exhaust cavity, the flow blocking channel is formed by intervals among the peripheral baffle plate, the upper confluence plate and the lower confluence plate, an inlet of the flow blocking channel is communicated with an outlet of the confluence channel and is arranged in a winding way, and an outlet of the flow blocking channel is communicated with the exhaust cavity; the flow-resisting baffle is arranged in the flow-resisting channel, the flow-resisting baffle is obliquely arranged on two opposite side walls of the flow-resisting channel towards the middle position of the separation inner cavity respectively, the flow-resisting baffles on the two side walls are arranged in a staggered manner, the flow-resisting channel on the battery box cover and the flow-resisting channel on the upper cover are correspondingly provided with flow-resisting channels, the peripheral baffle is correspondingly arranged in the flow-resisting channel on the battery box cover, the lower confluence plate is arranged on the corresponding confluence plate on the battery box cover, the flow-resisting baffles are also correspondingly arranged in the flow-resisting channel on the battery box cover, the flow-resisting baffles are obliquely arranged on the two opposite side walls of the flow-resisting channel towards the middle position of the separation inner cavity respectively, and the flow-resisting baffles on the two side walls are arranged in a staggered manner.

4. The battery structure with good exhaust effect according to claim 1, characterized in that: the buffer opening is formed by sinking downwards along the side wall from the upper side opening of the injection through hole; the injection through-hole's downside opening is equipped with the buffering inclined plane, the buffering inclined plane inwards slopes downwards from the side of injection through-hole and extends and form, the lower extreme of buffering mouth is higher than the buffering inclined plane.

5. The battery structure with good exhaust effect according to claim 1, characterized in that: the lateral wall that battery box lid bottom surface one side corresponds the battery unit is equipped with the strengthening rib, and the both sides of strengthening rib are the symmetry respectively and are provided with the guide, and two guides incline gradually and correspond the lateral wall setting of battery unit from the bottom to the strengthening rib direction respectively.

6. The battery structure with good exhaust effect according to claim 1, characterized in that: a terminal through hole for arranging a terminal is reserved on the battery box cover; the terminal is provided with a battery anode and cathode interface for connecting the anode and cathode of the battery, the bottom end of the terminal is arranged in the terminal through hole, and the terminal is fixed with the connecting terminal through hole at the upper side of the battery box cover; the bottom of the terminal extends out of the bottom of the terminal through hole and then extends outwards and upwards to form a riveting part, and the riveting part is riveted on the outer side wall of the bottom of the terminal through hole.

7. The battery structure with good exhaust effect according to claim 3, characterized in that: the height of the top surface of the peripheral baffle plate is equal to that of the top surface of the upper bus plate, the height of the top surface of the peripheral baffle plate is equal to that of the top surface of the lower bus plate, the height of the top surface of the flow blocking baffle plate is lower than that of the top surface of the peripheral baffle plate, the height of the top surface of the flow blocking baffle plate is lower than that of the top surface of the upper bus plate, and the height of the top surface of the flow blocking baffle plate is lower than that of the top surface of the lower bus plate.

8. The battery structure with good exhaust effect according to claim 3, characterized in that: the bottom surface of the flow resisting channel outlet is higher than that of the flow resisting channel inlet, and the bottom surface of the flow resisting channel outlet gradually decreases towards the flow resisting channel inlet.

9. The battery structure with good exhaust effect according to claim 1, characterized in that: the upper cover is provided with two confluence passages, the middle position of the upper cover is provided with a partition plate, the partition plate is arranged between the two confluence passages, the two confluence passages are symmetrically arranged relative to the partition plate, the partition plate is provided with a gas distribution port, and the gas distribution port is communicated with a distribution exhaust port and the confluence passages.

10. The battery structure with good exhaust effect according to claim 1, characterized in that: the battery unit is internally and correspondingly provided with a pole group, the pole group consists of a plurality of pole plates and busbars welded on the pole plates, each pole group is correspondingly provided with a positive pole busbar and a negative pole busbar, wall penetrating holes for welding the positive pole busbar and the negative pole busbar in the adjacent battery unit are reserved on the side wall between the adjacent battery units, and the positive pole busbar and the negative pole busbar in the adjacent battery unit are electrically connected in the wall penetrating holes after being pressed.