Energy storage power supply with gas concentration detection function

Abstract

The invention relates to the technical field of energy storage power supplies, in particular to an energy storage power supply with a gas concentration detection function. A battery shell and a battery cover are arranged in the shell; the battery cover is arranged at the top of the battery shell; a sealed battery cavity is formed between the battery shell and the battery cover; a battery assembly is arranged in the battery cavity; a gas concentration sensor is arranged in the battery cavity; the shell is provided with a power switch; and the power switch is electrically connected with the gas concentration sensor. The gas concentration sensor is arranged in the battery cavity, the concentration value of one gas or multiple gases in the battery cavity can be detected in real time, and when the concentration value of the gas exceeds the threshold value, the energy storage power supply stops charging or discharging, so that the energy storage power supply can stop working quickly, and damage to a user is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power supplies, and in particular to an energy storage power supply with a gas concentration detection function. Background Art

[0002] In the current electric bicycle field, the widespread use of lithium batteries has brought many conveniences, but it is also accompanied by safety risks. Among them, how to respond quickly to ensure user safety when the lithium battery has thermal runaway has become a key issue. At present, most solutions are to determine the thermal runaway situation by detecting the temperature of the lithium battery, and respond by cutting off the power supply when the temperature rises rapidly. However, this method has the defect of slow response speed and cannot take effective measures in time at the early stage of thermal runaway.

[0003] On the other hand, when a lithium battery is abnormal, a large amount of gas will be generated. The speed of responding by detecting gas is faster than the response speed of detecting temperature. However, in this field, how to effectively achieve rapid response by detecting gas is still in a state of urgent need to be solved, and there is a lack of mature and reliable technical solutions to meet the needs of rapid response to thermal runaway of lithium batteries in electric bicycles. Summary of the invention

[0004] The purpose of the present invention is to provide an energy storage power supply with a gas concentration detection function in view of the above-mentioned deficiencies in the prior art.

[0005] The object of the present invention is achieved through the following technical solutions: an energy storage power supply with a gas concentration detection function, comprising a shell; a battery shell and a battery cover are arranged in the shell; the battery cover is arranged on the top of the battery shell; a sealed battery cavity is formed between the battery shell and the battery cover; a battery assembly is arranged in the battery cavity; A gas concentration sensor is arranged in the battery cavity; a power switch is arranged in the housing; and the power switch is electrically connected to the gas concentration sensor.

[0006] The present invention is further configured such that a display shell is provided in the outer shell; a display cavity is provided in the display shell; a display liquid is provided in the display cavity; and a one-way valve is provided between the display cavity and the battery cavity and opens toward the display cavity.

[0007] The present invention is further configured such that a receiving groove is provided through the middle of the display shell; the battery shell and the battery cover are arranged in the receiving groove; the display shell is made of transparent material; and the outer shell is provided with an observation window.

[0008] The present invention is further configured as follows: the battery cover is provided with an opening through it; a fire extinguishing shell is fixedly provided on the top of the battery cover; a fire extinguishing liquid is provided in the fire extinguishing shell; the fire extinguishing shell is provided with a fire extinguishing port at the top of the opening; and a trigger mechanism is provided between the fire extinguishing port and the opening of the battery cover.

[0009] The present invention is further configured such that the trigger mechanism comprises a rotating disk rotatably arranged between the battery cover and the fire extinguishing shell; a through hole is arranged at the center of the rotating disk; the through hole is arranged between the fire extinguishing port and the opening; A plurality of valve plates are movably provided on the top of the rotating disc; the plurality of valve plates abut against each other to cover the through hole; a plurality of first limit grooves are provided along the diameter direction of the rotating disc; a first limit pin is provided at the bottom of the valve plate; the first limit pin is movably provided in the first limit groove; a plurality of second limit grooves connected end to end are provided at the bottom of the fire extinguishing shell; a second limit pin is provided on the top of the valve plate; the second limit pin is movably provided in the second limit groove.

[0010] The present invention is further configured that the rotating disc is provided with a driving plate; the driving plate is provided with an inclined groove; A lifting frame is provided in the display cavity for sealed lifting movement; a boss is provided on the top of the lifting frame; the boss protrudes out of the display shell; a tension spring is provided between the top of the display shell and the bottom of the boss; the boss is provided with a bayonet; the bayonet is movably arranged in the inclined groove.

[0011] The present invention is further configured such that an exhaust device is provided between the battery shell and the battery cover; the exhaust device comprises an exhaust shell provided in the battery cavity; an exhaust passage is provided in the exhaust shell; an air inlet communicating with the battery cavity is provided in the middle of the exhaust shell; an air outlet is provided through the battery cover; a first exhaust port communicating with the air outlet is provided at the top of the exhaust shell; a second exhaust port communicating with the display cavity is provided at the bottom of the exhaust shell; and the one-way valve is provided at the second exhaust port; The air inlet, the first exhaust port and the second exhaust port are respectively communicated with the exhaust passage.

[0012] The present invention is further configured such that a valve core is provided in the exhaust channel for sealing and lifting activities; the valve core divides the exhaust channel into an upper airway and a lower airway; the first exhaust port is connected to the top of the upper airway; and the second exhaust port is connected to the bottom of the lower airway.

[0013] The present invention is further configured such that the exhaust device further comprises a locking shell connected to the exhaust shell; a locking chamber is provided in the locking shell; a piston is provided in the locking chamber for sealing and movement; a connecting pipe communicating with the first exhaust port is provided at one end of the locking chamber; a first spring is provided between one end of the locking chamber and the piston; a locking pin is provided after the piston protrudes out of the locking shell; the locking pin is clamped with the valve core after protruding into the exhaust shell; a second spring is provided between the bottom of the valve core and the lower air passage; After the locking pin is clamped with the valve core, the air inlet is connected with the upper airway; After the locking pin is separated from the valve core, the second spring pushes the valve core to move so that the air inlet is connected to the lower air passage.

[0014] The present invention is further configured such that the first exhaust port is a trumpet-shaped structure.

[0015] Beneficial effects of the present invention: By arranging a gas concentration sensor in the battery cavity, the present invention can detect the concentration value of one or more gases in the battery cavity in real time. When the concentration value of the gas exceeds a threshold, the energy storage power supply stops charging or discharging, thereby quickly stopping the energy storage power supply from working and effectively preventing harm to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after the housing is hidden; Figure 4 It is a schematic diagram of the structure of the present invention when the housing and the fire extinguishing housing are hidden and in a normal state; Figure 5 It is a schematic diagram of the structure of the hidden housing and the fire extinguishing housing of the present invention when thermal runaway occurs; Figure 6 It is a cross-sectional view of the present invention when thermal runaway occurs after the housing is hidden; Figure 7 This is an exploded view of the structure of the present invention after the housing is hidden; Figure 8 This is a structural exploded view of the present invention from another perspective after the housing is hidden; Fig. 9 is a cross-sectional view of the display shell, battery shell and battery cover of the present invention; Fig.10 It is a schematic diagram of the structure of the exhaust device of the present invention; Fig.11 is a schematic structural diagram of the exhaust device of the present invention from another perspective; Fig.12 is a cross-sectional view of the exhaust device of the present invention; Among them: 1. Shell; 11. Observation window; 21. Battery shell; 22. Battery cavity; 23. Battery assembly; 24. Gas concentration sensor; 3. Battery cover; 31. Opening; 32. Gas outlet; 4. Display shell; 41. Display cavity; 42. One-way valve; 43. Accommodation groove; 44. Lifting frame; 45. Boss; 46. Tension spring; 47. Bayonet; 5. Fire extinguishing shell; 51. Fire extinguishing port; 52. Second limit groove; 6. Rotating disc; 61 , through hole; 62, valve plate; 63, first limit groove; 64, first limit pin; 65, second limit pin; 66, drive plate; 67, inclined groove; 7, exhaust shell; 71, air inlet; 72, upper air duct; 73, first exhaust port; 74, lower air duct; 75, second exhaust port; 8, valve core; 81, second spring; 9, locking shell; 91, locking chamber; 92, piston; 93, first spring; 94, connecting pipe; 95, locking pin. DETAILED DESCRIPTION

[0018] The present invention is further described in conjunction with the following examples.

[0019] Depend on Figures 1 to 12 It can be seen that the energy storage power supply with gas concentration detection function described in this embodiment includes a shell 1; a battery shell 21 and a battery cover 3 are arranged in the shell 1; the battery cover 3 is arranged on the top of the battery shell 21; a sealed battery cavity 22 is formed between the battery shell 21 and the battery cover 3; a battery assembly 23 is arranged in the battery cavity 22; wherein the battery assembly 23 can be a lithium battery, including electrodes, a diaphragm and an electrolyte, etc.; A gas concentration sensor 24 is provided in the battery cavity 22; a power switch is provided in the housing 1; and the power switch is electrically connected to the gas concentration sensor 24. The power switch is not shown in the figure, but the power switch can cut off the circuit when the energy storage power source is charging or discharging, so that the energy storage power source stops charging or discharging; the gas concentration sensor 24 can detect the concentration value of one or more gases in the battery cavity 22.

[0020] The energy storage power supply with a gas concentration detection function described in this embodiment can detect the concentration value of one or more gases in the battery cavity 22 in real time by setting a gas concentration sensor 24 in the battery cavity 22. When the concentration value of the gas exceeds a threshold value, the energy storage power supply stops charging or discharging, thereby quickly stopping the energy storage power supply from working and effectively preventing harm to the user.

[0021] In the energy storage power supply with gas concentration detection function described in this embodiment, a display shell 4 is provided in the outer shell 1; a display cavity 41 is provided in the display shell 4; a display liquid is provided in the display cavity 41; a one-way valve 42 is provided between the display cavity 41 and the battery cavity 22 and is opened toward the display cavity 41.

[0022] Specifically, when an abnormality occurs in a lithium battery, a variety of gases are generated, including acidic gases such as hydrofluoric acid or phosphoryl fluoride, and the display liquid can be a litmus solution; therefore, when an abnormality occurs in a lithium battery, the generated gas will enter the display cavity 41 through the one-way valve 42, and the display liquid in the display cavity 41 will react with the acidic gas and change color, thereby reminding the user that an abnormality occurs in the lithium battery.

[0023] In the energy storage power supply with gas concentration detection function described in this embodiment, a receiving groove 43 is provided through the middle of the display shell 4; the battery shell 21 and the battery cover 3 are arranged in the receiving groove 43; the display shell 4 is made of transparent material; and the outer shell 1 is provided with an observation window 11. The provision of the receiving groove 43 makes the overall structure stable and reliable; the provision of the observation window 11 facilitates the user to observe the color change of the display liquid.

[0024] In the energy storage power supply with a gas concentration detection function described in this embodiment, the battery cover 3 is provided with an opening 31; a fire extinguishing shell 5 is fixedly provided on the top of the battery cover 3; a fire extinguishing liquid is provided in the fire extinguishing shell 5; the fire extinguishing shell 5 is provided with a fire extinguishing port 51 at the top of the opening 31; and the battery cover 3 is provided with a trigger mechanism between the fire extinguishing port 51 and the opening 31. The energy storage power supply with gas concentration detection function described in this embodiment comprises a trigger mechanism comprising a rotating disk 6 rotatably arranged between a battery cover 3 and a fire extinguishing shell 5; a through hole 61 is arranged at the center of the rotating disk 6; the through hole 61 is arranged between the fire extinguishing port 51 and the opening 31; a plurality of valve plates 62 are movably arranged on the top of the rotating disk 6; the plurality of valve plates 62 cover the through hole 61 after abutting against each other; the rotating disk 6 is provided with a plurality of first limiting grooves 63 along the diameter direction; a first limiting pin 64 is arranged at the bottom of the valve plate 62; the first limiting pin 64 is movably arranged in the first limiting groove 63; a plurality of second limiting grooves 52 connected end to end are arranged at the bottom of the fire extinguishing shell 5; a second limiting pin 65 is arranged on the top of the valve plate 62; the second limiting pin 65 is movably arranged in the second limiting groove 52; wherein the plurality of second limiting grooves 52 form a regular polygon structure. In the energy storage power supply with gas concentration detection function described in this embodiment, the rotating disk 6 is provided with a driving plate 66; the driving plate 66 is provided with an inclined groove 67; a lifting frame 44 is provided in the display cavity 41 for sealing and lifting movement; a boss 45 is provided on the top of the lifting frame 44; the boss 45 protrudes out of the display shell 4; a tension spring 46 is provided between the top of the display shell 4 and the bottom of the boss 45; the boss 45 is provided with a bayonet 47; the bayonet 47 is movably arranged in the inclined groove 67.

[0025] Specifically, in the energy storage power supply with gas concentration detection function described in this embodiment, when the lithium battery is abnormal, the electrolyte will produce a large amount of gas, and the gas enters the display cavity 41 through the one-way valve 42. The color of the display liquid changes and the lifting frame 44 is pushed to move upward, so that the boss 45 overcomes the action of the tension spring 46 and drives the latch 47 to move upward; and the latch 47 is movably arranged in the inclined groove 67, so during the process of the latch 47 moving upward, the rotating disk 6 is driven to rotate.

[0026] During the rotation of the rotating disk 6, since the first limit pin 64 is movably arranged in the first limit groove 63, and the second limit pin 65 is movably arranged in the second limit groove 52, the rotating disk 6 rotates to move the valve plate 62, thereby opening the through hole 61, so that the fire extinguishing port 51, the through hole 61 and the opening 31 are connected, and the fire extinguishing liquid in the fire extinguishing shell 5 enters the battery cavity 22 through the fire extinguishing port 51, the through hole 61 and the opening 31 to cool the battery assembly 23, thereby preventing the battery assembly 23 from burning and causing harm to the user.

[0027] In the energy storage power supply with gas concentration detection function described in this embodiment, an exhaust device is provided between the battery shell 21 and the battery cover 3; the exhaust device includes an exhaust shell 7 arranged in the battery cavity 22; an exhaust channel is arranged in the exhaust shell 7; an air inlet 71 connected to the battery cavity 22 is arranged in the middle of the exhaust shell 7; an air outlet 32 ​​is provided through the battery cover 3; a first exhaust port 73 connected to the air outlet 32 ​​is arranged at the top of the exhaust shell 7; a second exhaust port 75 connected to the display cavity 41 is arranged at the bottom of the exhaust shell 7; the one-way valve 42 is arranged at the second exhaust port 75; the air inlet 71, the first exhaust port 73 and the second exhaust port 75 are respectively connected to the exhaust channel. In the energy storage power supply with gas concentration detection function described in this embodiment, a valve core 8 is provided in the exhaust channel for sealing and lifting activities; the valve core 8 divides the exhaust channel into an upper airway 72 and a lower airway 74; the first exhaust port 73 is connected to the top of the upper airway 72; the second exhaust port 75 is connected to the bottom of the lower airway 74. The energy storage power supply with gas concentration detection function described in this embodiment, the exhaust device also includes a locking shell 9 connected to the exhaust shell 7; a locking chamber 91 is provided in the locking shell 9; a piston 92 is sealed and movably provided in the locking chamber 91; a connecting pipe 94 connected to the first exhaust port 73 is provided at one end of the locking chamber 91; a first spring 93 is provided between one end of the locking chamber 91 and the piston 92; a locking pin 95 is provided after the piston 92 protrudes out of the locking shell 9; the locking pin 95 protrudes into the exhaust shell 7 and is clamped with the valve core 8; a second spring 81 is provided between the bottom of the valve core 8 and the lower air duct 74; after the locking pin 95 is clamped with the valve core 8, the air inlet 71 is connected with the upper air duct 72; after the locking pin 95 is separated from the valve core 8, the second spring 81 pushes the valve core 8 to move so that the air inlet 71 is connected with the lower air duct 74.

[0028] Specifically, the energy storage power supply with gas concentration detection function described in this embodiment, since the battery assembly 23 also generates gas during normal charging and normal discharging, that is, the generation of gas by the battery assembly 23 does not mean that the battery assembly 23 has thermal runaway; only when the battery assembly 23 generates a large amount of multiple different gases in a short period of time, it will be determined that the battery assembly 23 has thermal runaway.

[0029] Therefore, when the battery assembly 23 is in normal use, under the action of the locking pin 95, the valve core 8 is located below the air inlet 71. At this time, the air inlet 71 is connected to the upper air duct 72. Therefore, the gas generated by the battery assembly 23 during normal charging and normal discharging can be discharged to the outside through the air inlet 71, the upper air duct 72, the first exhaust port 73 and the air outlet 32 ​​in sequence, thereby preventing the air pressure in the battery cavity 22 from being too high.

[0030] When thermal runaway occurs in the battery assembly 23, the battery assembly 23 generates a large amount of multiple different gases in a short period of time. When the gas concentration sensor 24 detects that the concentration value of one or more gases in the battery chamber 22 exceeds the threshold value, the energy storage power supply stops charging or discharging, thereby quickly stopping the energy storage power supply from working and effectively preventing harm to the user. In addition, due to the increase in the gas concentration in the battery chamber 22, the flow rate of the gas flowing through the first exhaust port 73 increases. According to the Bernoulli principle, the pressure at the first exhaust port 73 is relatively low. At this time, the piston 92 overcomes the action of the first spring 93 and moves toward the connecting pipe 94, so that the locking pin 95 withdraws from the exhaust shell 7 and separates from the valve core 8, and the second spring 81 pushes the valve core 8 to move upward. The first exhaust port 73 of the valve core 8 is sealed, and the air inlet 71 is connected to the lower air duct 74; at this time, the gas generated by the battery assembly 23 enters the display cavity 41 through the air inlet 71, the lower air duct 74, the second exhaust port 75 and the one-way valve 42 in sequence, so that the display liquid in the display cavity 41 can quickly change color, and at the same time the lifting frame 44 can quickly move upward, so that the boss 45 overcomes the action of the tension spring 46 to drive the latch 47 to move upward, and drives the rotating disk 6 to rotate, so that the fire extinguishing port 51, the through hole 61 and the opening 31 are connected, and the fire extinguishing liquid in the fire extinguishing shell 5 enters the battery cavity 22 through the fire extinguishing port 51, the through hole 61 and the opening 31 to cool the battery assembly 23, thereby preventing the battery assembly 23 from burning and causing harm to the user.

[0031] In the energy storage power supply with gas concentration detection function described in this embodiment, the first exhaust port 73 is a trumpet-shaped structure. Through the above arrangement, the flow rate of the first exhaust port 73 can be further increased when thermal runaway occurs, so that the piston 92 can move quickly.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An energy storage power supply with gas concentration detection function, characterized in that: The battery comprises a housing (1); a battery housing (21) and a battery cover (3) are arranged inside the housing (1); the battery cover (3) is arranged on the top of the battery housing (21); a sealed battery cavity (22) is formed between the battery housing (21) and the battery cover (3); a battery assembly (23) is arranged inside the battery cavity (22); A gas concentration sensor (24) is provided in the battery cavity (22); a power switch is provided in the housing (1); and the power switch is electrically connected to the gas concentration sensor (24).

2. The energy storage power supply with gas concentration detection function according to claim 1, characterized in that: A display shell (4) is provided in the housing (1); a display cavity (41) is provided in the display shell (4); a display liquid is provided in the display cavity (41); and a one-way valve (42) is provided between the display cavity (41) and the battery cavity (22), which opens in the direction of the display cavity (41).

3. The energy storage power supply with gas concentration detection function according to claim 2, characterized in that: A receiving groove (43) is provided through the middle of the display shell (4); the battery shell (21) and the battery cover (3) are arranged in the receiving groove (43); the display shell (4) is made of transparent material; and the outer shell (1) is provided with an observation window (11).

4. The energy storage power supply with gas concentration detection function according to claim 2, characterized in that: The battery cover (3) is provided with an opening (31) extending through it; a fire extinguishing shell (5) is fixedly provided on the top of the battery cover (3); a fire extinguishing liquid is provided in the fire extinguishing shell (5); the fire extinguishing shell (5) is provided with a fire extinguishing port (51) at the top of the opening (31); and the battery cover (3) is provided with a trigger mechanism between the fire extinguishing port (51) and the opening (31).

5. The energy storage power supply with gas concentration detection function according to claim 4, characterized in that: The trigger mechanism comprises a rotating disk (6) rotatably arranged between the battery cover (3) and the fire extinguishing shell (5); a through hole (61) is arranged at the center of the rotating disk (6); the through hole (61) is arranged between the fire extinguishing port (51) and the opening (31); A plurality of valve plates (62) are movably provided on the top of the rotating disc (6); the plurality of valve plates (62) are abutted against each other to cover the through hole (61); a plurality of first limiting grooves (63) are provided on the rotating disc (6) along the diameter direction; a first limiting pin (64) is provided on the bottom of the valve plate (62); the first limiting pin (64) is movably provided in the first limiting groove (63); a plurality of second limiting grooves (52) connected end to end are provided on the bottom of the fire extinguishing shell (5); a second limiting pin (65) is provided on the top of the valve plate (62); the second limiting pin (65) is movably provided in the second limiting groove (52).

6. The energy storage power supply with gas concentration detection function according to claim 4, characterized in that: The rotating disc (6) is provided with a driving plate (66); the driving plate (66) is provided with an inclined groove (67); A lifting frame (44) is provided in the display cavity (41) so as to be sealed and lifted; a boss (45) is provided on the top of the lifting frame (44); the boss (45) protrudes out of the display shell (4); a tension spring (46) is provided between the top of the display shell (4) and the bottom of the boss (45); a latch (47) is provided on the boss (45); and the latch (47) is movably arranged in the inclined groove (67).

7. The energy storage power supply with gas concentration detection function according to claim 2, characterized in that: An exhaust device is provided between the battery shell (21) and the battery cover (3); the exhaust device comprises an exhaust shell (7) arranged in the battery cavity (22); an exhaust passage is provided in the exhaust shell (7); an air inlet (71) communicating with the battery cavity (22) is provided in the middle of the exhaust shell (7); an air outlet (32) is provided through the battery cover (3); a first exhaust port (73) communicating with the air outlet (32) is provided at the top of the exhaust shell (7); a second exhaust port (75) communicating with the display cavity (41) is provided at the bottom of the exhaust shell (7); the one-way valve (42) is provided at the second exhaust port (75); The air inlet (71), the first exhaust port (73) and the second exhaust port (75) are respectively connected to the exhaust channel.

8. The energy storage power supply with gas concentration detection function according to claim 7, characterized in that: A valve core (8) is provided in the exhaust passage for sealing and lifting movement; the valve core (8) divides the exhaust passage into an upper air passage (72) and a lower air passage (74); the first exhaust port (73) is connected to the top of the upper air passage (72); and the second exhaust port (75) is connected to the bottom of the lower air passage (74).

9. The energy storage power supply with gas concentration detection function according to claim 8, characterized in that: The exhaust device further comprises a locking shell (9) connected to the exhaust shell (7); a locking chamber (91) is provided in the locking shell (9); a piston (92) is provided in the locking chamber (91) in a sealing manner; a connecting pipe (94) communicating with the first exhaust port (73) is provided at one end of the locking chamber (91); a first spring (93) is provided between one end of the locking chamber (91) and the piston (92); a locking pin (95) is provided after the piston (92) protrudes out of the locking shell (9); the locking pin (95) is clamped with the valve core (8) after protruding into the exhaust shell (7); a second spring (81) is provided between the bottom of the valve core (8) and the lower air passage (74); After the locking pin (95) is clamped with the valve core (8), the air inlet (71) is connected to the upper airway (72); After the locking pin (95) is separated from the valve core (8), the second spring (81) pushes the valve core (8) to move so that the air inlet (71) is connected to the lower air passage (74).

10. The energy storage power supply with gas concentration detection function according to claim 9, characterized in that: The first exhaust port (73) is a trumpet-shaped structure.

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