Multifunctional battery shell

Abstract

The multifunctional battery shell comprises a bottom box and a box cover arranged at the upper end of the bottom box, the lower end of the bottom box is fixedly connected with a water box, a plurality of heat pipe plate mechanisms are horizontally fixed in the bottom box at equal intervals, and each heat pipe plate mechanism comprises a heat pipe, a connecting plate, a vacuumizing one-way valve assembly and a medium injection one-way valve assembly. The multiple connecting plates are horizontally arranged at equal intervals from front to back, heat pipes are fixed between the adjacent connecting plates, and the lower portions of the heat pipes penetrate through the bottom box and extend into the water box. When the lithium battery catches fire due to high-speed collision, due to the fact that the spontaneous combustion temperature of the lithium battery is usually between 150 DEG C and 250 DEG C, when the temperature borne by the glass valve body on the heat pipe exceeds 182 DEG C, the purple liquid medicine explodes the glass valve body in a supporting mode, the glass valve body does not block the upper end of the heat pipe any more, and then trifluoromethane in the heat pipe enters the bottom box to extinguish fire. Therefore, not only can the heat dissipation function be achieved, but also the automatic fire extinguishing function can be achieved, and the safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of battery shells, in particular to a multifunctional battery shell. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Due to the extremely active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. Therefore, lithium batteries need to be equipped with an outer shell as a protective barrier to reduce interference from the external environment.

[0003] Currently, when lithium batteries are installed in battery casings, if lithium batteries are used in new energy vehicles, when the new energy vehicle is in a high-speed collision, the lithium batteries may break or leak. The electrolyte is a flammable organic liquid. Once it leaks and encounters fire, it will burn immediately. Now the fire rate of new energy vehicles after a collision is extremely high. The cause of the fire is that the lithium battery is caused by a high-speed collision. For this reason, there is currently a lack of structure inside the battery casing to extinguish the fire of the lithium battery in the first time, which makes it difficult to improve safety. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a multifunctional battery housing to solve the problems raised in the above background technology.

[0005] A multifunctional battery housing, comprising a bottom box and a box cover arranged at the upper end thereof, wherein the lower end of the bottom box is fixedly connected to a water box, and a plurality of heat pipe plate mechanisms are fixed horizontally and equidistantly inside the bottom box, wherein the heat pipe plate mechanism comprises a heat pipe, a connecting plate, a vacuum one-way valve assembly and a medium injection one-way valve assembly, wherein the connecting plates are multiple and are arranged horizontally and equidistantly from front to back, and heat pipes are fixed between adjacent connecting plates, wherein the lower part of the heat pipe passes through the bottom box and extends into the water box, wherein the vacuum one-way valve assembly is installed at the upper end of the heat pipe, and the medium injection one-way valve assembly is installed at the lower end of the heat pipe;

[0006] The vacuum one-way valve assembly includes a glass valve body, a first spring, a first valve ball and a first L-shaped rod. The glass valve body is threadedly connected to the upper end of the heat pipe. A first valve cavity is provided in the middle of the glass valve body. The first valve ball is arranged inside the first valve cavity. The first spring is connected between the upper end of the first valve ball and the inner wall of the first valve cavity. The first L-shaped rod has a pair of symmetrically fixed on the left and right ends of the first valve ball.

[0007] Furthermore, a refrigeration device is installed at the front of the water box, and the refrigeration device includes a semiconductor refrigeration plate, a heat dissipation fin, and a heat dissipation fan. The semiconductor refrigeration plate is fixedly installed on the water box, the heat dissipation fin is fixedly installed on the hot end of the semiconductor refrigeration plate, and the heat dissipation fan is located on the other side of the heat dissipation fin, and the heat dissipation fan is fixedly installed on the water box.

[0008] Furthermore, the outer walls of the upper and lower ends of the heat pipe are provided with threads, and the lower end of the glass valve body is provided with a first thread groove, and the first thread groove is connected to the upper part of the heat pipe through threads.

[0009] Furthermore, the glass valve body is a heat-sensitive glass tube, and a liquid storage cavity is provided inside the inner wall of the glass valve body. The liquid storage cavity is filled with purple liquid medicine, and the expansion boiling point of the purple liquid medicine is 182°C.

[0010] Furthermore, the heat pipe is filled with a fire-fighting heat-conducting medium, and the fire-fighting heat-conducting medium is trifluoromethane.

[0011] Furthermore, the medium injection one-way valve assembly includes a copper valve body, a second spring, a second valve ball and a second L-shaped rod. A second thread groove is opened at the upper end of the copper valve body, and the second thread groove is connected to the lower part of the heat pipe by a thread. A second valve cavity is provided in the middle part of the copper valve body, and the second valve ball is arranged inside the second valve cavity. The second spring is connected between the upper end of the second valve ball and the inner wall of the second valve cavity. The second L-shaped rod has a pair of symmetrically fixed on the left and right ends of the second valve ball.

[0012] Furthermore, a fixing plate is fixed to the outside of the heat pipe, and the fixing plate is located at the bottom of the bottom box and is fixed to the bottom box.

[0013] Furthermore, a moisture-proof pad is provided at the bottom end of the bottom box, a rubber pad is provided at the upper end of the moisture-proof pad, a stainless steel pad is provided at the upper end of the rubber pad, a screw is provided through the stainless steel pad and the bottom box, the screw is threadedly connected to the bottom box, the screw is provided through the moisture-proof pad and the rubber pad, the fixing plate is located above the stainless steel pad and is welded to the stainless steel pad in a ring shape, and the heat pipe is provided through the moisture-proof pad and the rubber pad.

[0014] Furthermore, elastic members are fixed to the upper sides of both left and right ends of the connecting plate, the elastic members are made of graphene, the connecting plate is made of copper, and the elastic members and the evaporation end of the heat pipe are located on the same side.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. Multiple heat pipe plate mechanisms are arranged horizontally and equidistantly inside the bottom box, so that the lithium battery is placed between two adjacent heat pipe plate mechanisms, and can pass through the heat pipe, and the condensation end of the heat pipe is placed in the water of the water box, so that the trifluoromethane at the evaporation end of the heat pipe absorbs the heat emitted by the lithium battery, and then the steam moves down to the condensation end of the heat pipe, and then condenses and returns to the evaporation end through capillary phenomenon, so that the lithium battery in the battery shell can be cooled and prevented from overheating;

[0017] 2. When a lithium battery is caught in a high-speed collision, due to the wide combustion temperature range of lithium batteries, the maximum external temperature can reach 283°C to 1090°C, and the self-ignition temperature of lithium batteries is usually between 150°C and 250°C. When the temperature of the glass valve body on the heat pipe exceeds 182°C, the purple liquid will burst the glass valve body, so that the glass valve body no longer blocks the upper end of the heat pipe, and then the trifluoromethane inside the heat pipe enters the bottom box to extinguish the fire, which not only plays the role of heat dissipation, but also plays the role of automatic fire extinguishing, improving safety;

[0018] 3. By installing a refrigeration device at the front end of the water box, the water inside the water box can be cooled by using a semiconductor refrigeration sheet, and the cooperation of the heat dissipation fins and the heat dissipation fan can dissipate heat from the semiconductor refrigeration sheet, so that the condensation end of the heat pipe can be kept at a low temperature, thereby improving the use effect of the heat pipe;

[0019] 4. The setting of the vacuum check valve assembly is not only conducive to bursting due to the flame temperature, but also conducive to vacuuming the inside of the heat pipe. The setting of the medium injection check valve assembly not only injects the fire-fighting heat-conducting medium into the heat pipe after vacuuming, but also the copper material of the copper valve body is conducive to heat conduction inside the water box, improving practicality;

[0020] 5. By setting an elastic member, the elastic member is made of graphene. Since the thermal conductivity of graphene is far superior to that of metal materials and graphene has extremely high elasticity, the elastic member can not only conduct the heat of the lithium battery to the connecting plate, and the heat of the connecting plate to the evaporation end of the heat pipe, but also when the new energy vehicle collides, when the lithium battery squeezes the elastic member, the elastic member can play a buffering role, so that the impact force on the lithium battery on one side is gradually reduced;

[0021] 6. A moisture-proof pad, a rubber pad and a stainless steel pad are sequentially arranged at the bottom of the bottom box. The moisture-proof pad is laid as a bottom in the bottom box to prevent moisture from entering the bottom of the bottom box. The rubber pad laid on the moisture-proof pad improves the sealing between the heat pipe and the bottom box and the sealing between the water box and the bottom box. In particular, the lithium battery presses down on the rubber pad to deform the rubber pad so that the hole of the rubber pad is close to the heat pipe. Then, the stainless steel pad is used for the fixing plate of the heat pipe and the stainless steel pad. After the ring welding, the penetration gap between the heat pipe and the stainless steel pad is further prevented from leaking, thereby avoiding water from entering the bottom of the bottom box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 A partial enlarged view of;

[0024] Figure 3 This is a schematic diagram of the heat pipe plate structure of the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of the bottom box of the present invention;

[0026] Figure 5 For the present invention Figure 4 B is a partial enlarged view;

[0027] Figure 6 For the present invention Figure 4 A partial enlarged view of C.

[0028] In the figure: 1-bottom box, 11-moisture-proof pad, 12-rubber pad, 13-stainless steel pad, 2-box cover, 3-water box, 4-heat pipe plate mechanism, 41-heat pipe, 42-connecting plate, 43-vacuum one-way valve assembly, 431-glass valve body, 432-first valve cavity, 433-first spring, 434-first valve ball, 435-first L-shaped rod, 436-liquid storage cavity, 437-first thread groove, 44-medium injection one-way valve assembly, 441-copper valve body, 442-second valve cavity, 443-second spring, 444-second valve ball, 445-second L-shaped rod, 446-second thread groove, 45-fixed plate, 46-elastic member, 5-refrigeration device, 51-semiconductor refrigeration plate, 52-heat sink, 53-heat sink fan. DETAILED DESCRIPTION

[0029] See also Figure 1-Figure 6A multifunctional battery housing comprises a bottom box 1 and a box cover 2 arranged at the upper end thereof, the lower end of the bottom box 1 is fixedly connected to a water box 3, a plurality of heat pipe plate mechanisms 4 are fixed horizontally and equidistantly inside the bottom box 1, the heat pipe plate mechanism 4 comprises a heat pipe 41, a connecting plate 42, a vacuum check valve assembly 43 and a medium injection check valve assembly 44, the connecting plates 42 are multiple and are arranged horizontally and equidistantly from front to back, and a heat pipe 41 is fixed between adjacent connecting plates 42, the lower part of the heat pipe 41 passes through the bottom box 1 and extends into the water box 3, the vacuum check valve assembly 43 is installed at the upper end of the heat pipe 41, the medium injection check valve assembly 44 is installed at the lower end of the heat pipe 41, the vacuum check valve assembly 43 comprises a glass valve body 431, a first spring 4 33, a first valve ball 434 and a first L-shaped rod 435, the glass valve body 431 is threadedly connected to the upper end of the heat pipe 41, the outer walls of the upper and lower ends of the heat pipe 41 are provided with threads, the lower end of the glass valve body 431 is provided with a first thread groove 437, the first thread groove 437 is threadedly connected to the upper part of the heat pipe 41, the middle part of the glass valve body 431 is provided with a first valve cavity 432, the first valve ball 434 is arranged inside the first valve cavity 432, the first spring 433 is connected between the upper end of the first valve ball 434 and the inner wall of the first valve cavity 432, the first L-shaped rod 435 has a pair of symmetrically fixed on the left and right ends of the first valve ball 434, when the vacuum one-way valve assembly 43 is used for vacuuming, the suction force sucks the first valve ball 434 open, so that the first valve ball 432 34 squeezes the first spring 433, at this time the first valve ball 434 no longer blocks the bottom of the first valve cavity 432, and the first valve ball 434 drives the end of the first L-shaped rod 435 to abut against the top of the first valve cavity 432 to prevent the first valve ball 434 from blocking the top of the first valve cavity 432, so that the inside of the heat pipe 41 can be evacuated, and the glass valve body 431 is a thermosensitive glass tube, and the inner wall of the glass valve body 431 is provided with a liquid storage cavity 436, and the liquid storage cavity 436 is filled with purple liquid, and the expansion boiling point of the purple liquid is 182°C. Since the heat pipe 41 is filled with a fire-fighting heat-conducting medium, which is trifluoromethane, when the lithium battery is caught in a high-speed collision, due to the wide combustion temperature range of the lithium battery, its external maximum temperature can reach 283°C To 1090℃, and the self-ignition temperature of lithium batteries is usually between 150℃ and 250℃. As the temperature of the glass valve body 431 on the heat pipe 41 exceeds 182℃, the purple liquid will burst the glass valve body 431, so that the glass valve body 431 no longer blocks the upper end of the heat pipe 41, and then the trifluoromethane inside the heat pipe 41 enters the bottom box 1 for fire extinguishing. The trifluoromethane can be used as both a refrigerant and a fire extinguishing agent. In this way, by arranging multiple heat pipe plate mechanisms 4 at equal intervals horizontally inside the bottom box 1, the lithium battery is placed between two adjacent heat pipe plate mechanisms 4, and the heat pipe 41 can be passed through. The condensation end of the heat pipe 41 is placed in the water of the water box 3. The trifluoromethane at the evaporation end of the heat pipe 41 absorbs the heat emitted by the lithium battery, and then the steam moves down to the condensation end of the heat pipe 41.The recondensation returns to the evaporation end through capillary phenomenon, which can dissipate heat to the lithium battery in the battery shell and prevent the lithium battery in the battery shell from overheating. This not only plays a heat dissipation function, but also plays an automatic fire extinguishing function, thereby improving safety.

[0030] See also Figure 1-Figure 5 The medium injection one-way valve assembly 44 includes a copper valve body 441, a second spring 443, a second valve ball 444 and a second L-shaped rod 445. The upper end of the copper valve body 441 is provided with a second thread groove 446, and the second thread groove 446 is connected to the lower part of the heat pipe 41 by a thread. The middle part of the copper valve body 441 is provided with a second valve cavity 442, and the second valve ball 444 is arranged inside the second valve cavity 442. The second spring 443 is connected between the upper end of the second valve ball 444 and the inner wall of the second valve cavity 442. The second L-shaped rod 445 has a pair of and is symmetrically fixed on the left and right ends of the second valve ball 444. When the interior of the heat pipe 41 is evacuated, the first valve ball 434 is vented by the first spring 443. 33 blocks the bottom of the first valve chamber 432 again, and then the fire-fighting heat-conducting medium can be injected through the copper valve body 441. The copper valve body 441 is made of copper material to better conduct temperature inside the water box 3. During injection, the fire-fighting heat-conducting medium pushes the second valve bead 444 to squeeze the second spring 443, and then enters the heat pipe 41. The setting of the vacuum one-way valve assembly 43 is not only conducive to bursting due to the flame temperature, but also conducive to vacuuming the inside of the heat pipe 41. The setting of the medium injection one-way valve assembly 44 is not only conducive to injecting the fire-fighting heat-conducting medium after the heat pipe 41 is vacuumed, but also the copper material of the copper valve body 441 is conducive to conducting temperature inside the water box 3, thereby improving practicality.

[0031] See also Figure 1-Figure 2 A refrigeration device 5 is installed at the front of the water box 3, and the refrigeration device 5 includes a semiconductor refrigeration sheet 51, a heat dissipation fin 52, and a heat dissipation fan 53. The semiconductor refrigeration sheet 51 is fixedly installed on the water box 3, and the heat dissipation fin 52 is fixedly installed on the hot end of the semiconductor refrigeration sheet 51. The heat dissipation fan 53 is located on the other side of the heat dissipation fin 52. The heat dissipation fan 53 is fixedly installed on the water box 3. By installing the refrigeration device 5 at the front end of the water box 3, the semiconductor refrigeration sheet 51 can be used to cool the water inside the water box 3, and the heat dissipation fin 52 and the heat dissipation fan 53 cooperate to dissipate the heat of the semiconductor refrigeration sheet 51, so that the condensation end of the heat pipe 41 can ensure a low temperature, thereby improving the use effect of the heat pipe 41.

[0032] See also Figure 1-Figure 4The heat pipe 41 is fixed with a fixing plate 45 on the outside, and the fixing plate 45 is located at the bottom of the bottom box 1 and fixed to the bottom box 1. The bottom end of the bottom box 1 is paved with a moisture-proof pad 11, and the upper end of the moisture-proof pad 11 is padded with a rubber pad 12, and the upper end of the rubber pad 12 is padded with a stainless steel pad 13. Screws are arranged between the stainless steel pad 13 and the bottom box 1, and the screws are threadedly connected to the bottom box 1. The screws are arranged through the moisture-proof pad 11 and the rubber pad 12. The fixing plate 45 is located above the stainless steel pad 13 and is annularly welded to the stainless steel pad 13. The heat pipe 41 is penetrated by the moisture-proof pad 11 and the rubber pad 12. The moisture-proof pad 11 is laid as a bottom in the bottom box 1, which can play a moisture-proof role at the bottom of the bottom box 1, and the rubber pad 12 laid on the moisture-proof pad 11 improves the sealing between the heat pipe 41 and the bottom box 1 and the sealing between the water box 3 and the bottom box 1. In particular, the lithium battery presses down the rubber pad 12, which can deform the rubber pad 12 and make the hole of the rubber pad 12 close to the heat pipe 41. Then, through the stainless steel pad 13, the fixing plate 45 for the heat pipe 41 is annularly welded with the stainless steel pad 13 to produce an annular weld, which further prevents water leakage from the through gap between the heat pipe 41 and the stainless steel pad 13, thereby avoiding water from entering the bottom of the bottom box 1.

[0033] See also Figure 1-Figure 3 Elastic members 46 are fixed to the upper sides of both left and right ends of the connecting plate 42. Since the elastic member 46 is made of graphene and the connecting plate 42 is made of copper, the elastic member 46 and the evaporation end of the heat pipe 41 are located on the same side. The thermal conductivity of graphene is far superior to that of metal materials, and graphene has extremely high elasticity, so that the elastic member 46 can not only conduct the heat of the lithium battery to the connecting plate 42, and the heat of the connecting plate 42 to the evaporation end of the heat pipe 41, but also when the new energy vehicle collides, when the lithium battery squeezes the elastic member 46, the elastic member 46 can play a buffering role, so that the impact force on the lithium battery in the opposite direction of the impact force is gradually reduced.

Claims

1. A multifunctional battery housing, comprising a bottom box (1) and a box cover (2) arranged at the upper end thereof, Features: The lower end of the bottom box (1) is fixedly connected to a water box (3); a plurality of heat pipe plate mechanisms (4) are fixedly arranged horizontally and equidistantly inside the bottom box (1); the heat pipe plate mechanism (4) comprises a heat pipe (41), a connecting plate (42), a vacuum one-way valve assembly (43) and a medium injection one-way valve assembly (44); there are a plurality of connecting plates (42) which are arranged horizontally and equidistantly from front to back; a heat pipe (41) is fixedly arranged between adjacent connecting plates (42); the lower portion of the heat pipe (41) passes through the bottom box (1) and extends into the water box (3); the vacuum one-way valve assembly (43) is mounted on the upper end of the heat pipe (41); and the medium injection one-way valve assembly (44) is mounted on the lower end of the heat pipe (41); The vacuum one-way valve assembly (43) comprises a glass valve body (431), a first spring (433), a first valve ball (434) and a first L-shaped rod (435); the glass valve body (431) is threadedly connected to the upper end of the heat pipe (41); a first valve cavity (432) is provided in the middle of the glass valve body (431); the first valve ball (434) is arranged inside the first valve cavity (432); the first spring (433) is connected between the upper end of the first valve ball (434) and the inner wall of the first valve cavity (432); and a pair of the first L-shaped rods (435) are symmetrically fixed at the left and right ends of the first valve ball (434).

2. A multifunctional battery housing according to claim 1, Features: A refrigeration device (5) is installed at the front of the water box (3), and the refrigeration device (5) comprises a semiconductor refrigeration sheet (51), a heat dissipation fin (52), and a heat dissipation fan (53). The semiconductor refrigeration sheet (51) is fixedly installed on the water box (3), the heat dissipation fin (52) is fixedly installed on the hot end of the semiconductor refrigeration sheet (51), and the heat dissipation fan (53) is located on the other side of the heat dissipation fin (52). The heat dissipation fan (53) is fixedly installed on the water box (3).

3. A multifunctional battery housing according to claim 1, Features: The outer walls of the upper and lower ends of the heat pipe (41) are both provided with threads, and the lower end of the glass valve body (431) is provided with a first thread groove (437), and the first thread groove (437) is connected to the upper part of the heat pipe (41) through threads.

4. A multifunctional battery housing according to claim 1, Features: The glass valve body (431) is a heat-sensitive glass tube. A liquid storage chamber (436) is provided inside the inner wall of the glass valve body (431). Purple liquid medicine is contained inside the liquid storage chamber (436). The expansion boiling point of the purple liquid medicine is 182°C.

5. A multifunctional battery housing according to claim 1, Features: The heat pipe (41) is filled with a fire-fighting heat-conducting medium, and the fire-fighting heat-conducting medium is trifluoromethane.

6. A multifunctional battery housing according to claim 3, Features: The medium injection one-way valve assembly (44) comprises a copper valve body (441), a second spring (443), a second valve ball (444) and a second L-shaped rod (445). The upper end of the copper valve body (441) is provided with a second thread groove (446), and the second thread groove (446) is connected to the lower part of the heat pipe (41) by a thread. A second valve cavity (442) is provided in the middle of the copper valve body (441), and the second valve ball (444) is arranged inside the second valve cavity (442). The second spring (443) is connected between the upper end of the second valve ball (444) and the inner wall of the second valve cavity (442). The second L-shaped rod (445) has a pair of symmetrically fixed on the left and right ends of the second valve ball (444).

7. A multifunctional battery housing according to claim 1, Features: A fixing plate (45) is fixed to the outside of the heat pipe (41); the fixing plate (45) is located at the bottom of the bottom box (1) and is fixed to the bottom box (1).

8. A multifunctional battery housing according to claim 7, Features: The bottom of the bottom box (1) is padded with a moisture-proof pad (11), the upper end of the moisture-proof pad (11) is padded with a rubber pad (12), the upper end of the rubber pad (12) is padded with a stainless steel pad (13), a screw is provided between the stainless steel pad (13) and the bottom box (1), the screw is threadedly connected to the bottom box (1), the screw is provided through the moisture-proof pad (11) and the rubber pad (12), the fixing plate (45) is located above the stainless steel pad (13) and is annularly welded to the stainless steel pad (13), and the heat pipe (41) is provided through the moisture-proof pad (11) and the rubber pad (12).

9. A multifunctional battery housing according to claim 1, Features: Elastic members (46) are fixed to the upper sides of both left and right ends of the connecting plate (42), the elastic member (46) is made of graphene, the connecting plate (42) is made of copper, and the elastic member (46) and the evaporation end of the heat pipe (41) are located on the same side.

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