CN210245573U

CN210245573U - Safety protection power module

Info

Publication number: CN210245573U
Application number: CN201921058032.1U
Authority: CN
Inventors: Yinggui Zhang; 张应贵
Original assignee: Guangdong Top Power Electronics Technology Co ltd
Current assignee: Guangdong Top Power Electronics Technology Co ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-04-03
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to a power module technical field just discloses a safety protection power module, including outer container, inner box, coupling part, supporting part, water absorbent resin, tinfoil, dust screen, cooling fan, apron, sealing strip, lug, electrothermal tube, fire-retardant rock wool, handle and footing, the inner box is located the inside of outer container, coupling part and supporting part all are located the space between outer container and the inner box, coupling part and supporting part fixed connection, the inner box inside wall all around respectively with one side fixed connection of water absorbent resin, the inside of water absorbent resin is the saturated condition. The utility model discloses reached the purpose that improves power module security performance, even also can give the buffering effect under the condition that is in external shock or puncture to can also play shock attenuation, heat preservation explosion-proof and fire-retardant effect, consequently can improve internal power module's security performance, still have the radiating effect simultaneously.

Description

Safety protection power module

Technical Field

The utility model relates to a power module technical field specifically is a safety protection power module.

Background

A power supply system composed of a lithium ion secondary battery and a battery module is widely applied to power and energy storage equipment systems. When the battery is impacted, extruded or punctured by mechanical external force, short circuit occurs, and the safety accident of battery ignition, combustion and explosion is caused. When the ambient temperature is lower than-40 ℃, the lithium ion secondary battery stops working.

Chinese patent publication No. CN205752266U discloses "a safety protection power module", in the specification, a shell of a fire extinguishing layer 5 is made of tin-bismuth low-melting-point fusible alloy with a melting point of 95 ℃, and a carbon tetrachloride organic solvent fire extinguishing agent is arranged in the fire extinguishing layer. When the internal temperature of the battery module is higher than 95 ℃, the shell of the low-melting-point fire extinguishing layer 5 is preset for 4 seconds, after 4 seconds, the tin-bismuth low-melting-point fusible alloy is melted, and carbon tetrachloride in the shell of the fire extinguishing layer 5 is led out to cover the surface of the battery pack, so that the flame-retardant and fireproof effects are achieved, and the battery is prevented from being exploded due to fire.

However, carbon tetrachloride is a colorless toxic liquid, which dissolves various substances such as fats and paints, a volatile liquid, which is not flammable, has been used as a fire extinguishing agent, but has been stopped because it reacts with water at temperatures above 500 ℃ to produce carbon dioxide and toxic phosgene, chlorine and hydrogen chloride gases, which in addition accelerate the decomposition of the ozone layer. The use of carbon tetrachloride is strictly limited by the country, and is only used for the raw material use and special use of non-ozone depleting substances.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a safety protection power module has reached the purpose that improves power module security performance, even also can give the buffering effect under the condition that is in external shock or puncture to can also play shock attenuation, heat preservation explosion-proof and fire-retardant effect, consequently can improve inside power module's security performance, still have the radiating effect simultaneously.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a safety protection power supply module comprises an outer box, an inner box, a connecting part, a supporting part, water-absorbing resin, tinfoil, a dust screen, a heat-radiating fan, a cover plate, a sealing strip, a bump, an electric heating tube, flame-retardant rock wool, a handle and feet, wherein the inner box is positioned inside the outer box, the connecting part and the supporting part are both positioned in a gap between the outer box and the inner box, the connecting part and the supporting part are fixedly connected, the periphery of the inner side wall of the inner box is fixedly connected with one side of the water-absorbing resin respectively, the inside of the water-absorbing resin is in a saturated state, the other side of the water-absorbing resin is fixedly connected with one side of the tinfoil through glue, heat-radiating holes are formed in the middle positions of the front surface and the back surface of the outer box, the heat-radiating holes are communicated with the inside of the inner box, the inner side wall of the heat-radiating holes is fixedly connected, the heat dissipation fan and the heat dissipation holes are located at the same position.

Preferably, the connecting part and the supporting part are both of rubber structures, the connecting part is a transverse straight edge, the supporting part is a staggered oblique edge, the connecting part and the supporting part are connected in a staggered mode, and the connecting part and the supporting part are of an integrally formed structure.

Preferably, the periphery of the bottom of the cover plate is fixedly connected with the periphery of the top of the sealing strip, and a groove matched with the sealing strip for use is formed in the periphery of the top of the inner box.

Preferably, the middle position of apron bottom and the top fixed connection of lug, the both sides of lug inner wall respectively with the both ends fixed connection of electrothermal tube, the bottom of lug and the top fixed connection of fire-retardant rock wool, the through-hole has been seted up to the bottom of lug, the through-hole is in the connected state with fire-retardant rock wool.

Preferably, the outer box and the inner box are of an integrally formed structure, and the outer box and the inner box are of aluminum alloy structures.

Preferably, the tops of the middle positions of the two sides of the outer box are respectively fixedly connected with one side of the two handles, and the outer surfaces of the handles are sleeved with the protective sleeves.

Preferably, two sides of the bottom of the outer box are respectively and fixedly connected with one side of the four bottom feet, and hole grooves matched with bolts for use are formed in the four bottom feet.

(III) advantageous effects

The utility model provides a safety protection power module. The method has the following beneficial effects:

(1) the utility model discloses because the outer container, the inner box, coupling part and supporting part's setting, two-layer independent structure through outer container and inner box, can make the inside of inner box keep the state isolated relatively, adopt the aluminum alloy material simultaneously, can improve holistic physical strength and anti collision ability, and whole quality is light, cooperate rubber material crisscross coupling part and the supporting part of formula between vertically and horizontally, consequently receive powerful extrusion and the inner box when the explosion strikes at the outer box, supporting part's shear force formula structure can give abundant buffering effect between outer container and the inner box, and can also play the shock attenuation, keep warm and fire-retardant effect, consequently, can improve internal power module's security performance.

(2) The utility model discloses because the setting of water absorbent resin and tinfoil, the water absorbent resin through setting up the saturated condition around the inner wall at the inner box, when the inside of inner box received the high temperature state, the tinfoil is because the melting point is lower, can melt fast, the water absorbent resin who makes the saturated condition reaches fire-retardant effect, water absorbent resin can set to half saturated condition or unsaturated state simultaneously, consequently, can play absorptive effect to the inside moist steam of inner box, thereby the dry condition of inner box internal power module group has been guaranteed, and then the dampproofing effect in the power module operation has been improved, and the safety performance is improved.

(3) The utility model discloses because louvre, dust screen and cooling fan's setting, when the inside high temperature of inner box, the operation through cooling fan realizes the exchange with the outside temperature environment of outer container through the louvre, thereby make the power module of inner box inside be in among the suitable environment, and the dustproof effect of cooperation dust screen, can block the dust in the external environment, thereby guaranteed the inside clean and tidy of inner box, avoided power module to receive dust pollution, and lead to shortening life phenomenon's emergence.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a single schematic view of the structural attachment and support portions of the present invention;

FIG. 3 is a schematic cross-sectional view of the structure of the present invention;

fig. 4 is a schematic cross-sectional view of the structure bump of the present invention;

fig. 5 is a schematic diagram of the main circuit of the structural power supply of the present invention.

In the figure: 1. an outer box; 2. an inner box; 3. a connecting portion; 4. a support portion; 5. a water-absorbent resin; 6. tin foil; 7. heat dissipation holes; 8. a dust screen; 9. a heat radiation fan; 10. a cover plate; 11. a sealing strip; 12. a bump; 13. a groove; 14. an electric heating tube; 15. flame-retardant rock wool; 16. a through hole; 17. a handle; 18. and (5) footing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution: a safety protection power supply module comprises an outer box 1, an inner box 2, a connecting part 3, a supporting part 4, water-absorbent resin 5, tinfoil 6, a dustproof net 8, a heat-radiating fan 9, a cover plate 10, a sealing strip 11, a bump 12, an electric heating tube 14, flame-retardant rock wool 15, a handle 17 and a footing 18, wherein the inner box 2 is positioned inside the outer box 1, the connecting part 3 and the supporting part 4 are both positioned in a gap between the outer box 1 and the inner box 2, the connecting part 3 and the supporting part 4 are fixedly connected, the periphery of the inner side wall of the inner box 2 is fixedly connected with one side of the water-absorbent resin 5 respectively, the inside of the water-absorbent resin 5 is in a saturated state, the other side of the water-absorbent resin 5 is fixedly connected with one side of the tinfoil 6 through glue, due to the arrangement of the water-absorbent resin 5 and the tinfoil 6, the water-absorbent resin 5 in the saturated state is arranged around the inner wall of, the tin foil 6 can be melted rapidly due to a lower melting point, so that the water-absorbent resin 5 in a saturated state achieves a flame-retardant effect, and meanwhile, the water-absorbent resin 5 can be set to be in a semi-saturated state or an unsaturated state, so that moisture vapor in the inner box 2 can be absorbed, thereby ensuring the dry state of the power module group in the inner box 2, further improving the moisture-proof effect in the operation of the power module, and improving the safety performance, the heat dissipation holes 7 are respectively arranged at the middle positions of the front surface and the back surface of the outer box 1, the heat dissipation holes 7 are communicated with the inside of the inner box 2, the inner side walls of the heat dissipation holes 7 are fixedly connected with the outer side wall of the dustproof net 8, one side of the inner wall of the inner box 2 is fixedly connected with one side of the heat dissipation fan 9, the heat dissipation fan 9 and the heat dissipation holes 7 are positioned at the same position, due to the, the operation through cooling fan 9 is through louvre 7 and the outside temperature environment realization exchange of outer container 1 to make the inside power module of inner box 2 be in among the suitable environment, and cooperate the dustproof effect of dust screen 8, can block the dust in the external environment, thereby guaranteed the inside clean and tidy of inner box 2, avoided power module to receive dust pollution, and lead to the emergence of shortening life phenomenon.

The outer box 1 and the inner box 2 are of an integrally formed structure, the outer box 1 and the inner box 2 are of aluminum alloy structures, the connecting part 3 and the supporting part 4 are of rubber structures, the connecting part 3 is a transverse straight edge, the supporting part 4 is a staggered inclined edge, the connecting part 3 and the supporting part 4 are mutually staggered and connected, the connecting part 3 and the supporting part 4 are of an integrally formed structure, due to the arrangement of the outer box 1, the inner box 2, the connecting part 3 and the supporting part 4, the inner part of the inner box 2 can be kept in a relatively isolated state through the two-layer independent structure of the outer box 1 and the inner box 2, meanwhile, the aluminum alloy material is adopted, the integral physical strength and the anti-collision capacity can be improved, the integral quality is light, and meanwhile, the connecting part 3 and the supporting part 4 which are staggered vertically and horizontally are made of rubber materials are matched, so when the outer box 1 is strongly extruded and the inner box 2 is impacted, the shear structure of the supporting part can provide sufficient buffering effect between the outer box 1 and the inner box 2, and can also play the roles of shock absorption, heat preservation and flame retardance, thereby improving the safety performance of the internal power module, the periphery of the bottom of the cover plate 10 is respectively and fixedly connected with the periphery of the top of the sealing strip 11, the periphery of the top of the inner box 2 is provided with a groove 13 matched with the sealing strip 11 for use, when the cover plate 10 is buckled with the top of the outer box 1, the sealing strip 11 and the groove 13 are mutually clamped, at the moment, the sealing strip 11 made of rubber can form a sealing effect between the cover plate 10 and the inner box 2, thereby avoiding the entering of water vapor, dust and pollutants, further improving the integral protection performance, the middle position of the bottom of the cover plate 10 is fixedly connected with the top of the convex block 12, the two sides of the inner wall of the convex block 12 are respectively and fixedly connected with the two ends of the electric heating tube, through-hole 16 has been seted up to the bottom of lug 12, through-hole 16 is in the intercommunication state with fire-retardant rock wool 15, electrothermal tube 14 can carry out the thermal treatment to the inside of inner box 2, when the temperature is less than suitable operating temperature, carry out real-time supervision by temperature sensor, simultaneously by the operation of controller control electrothermal tube 14, thereby make the inside temperature of inner box 2 rise, guarantee internal power module's normal operating, the top of outer container 1 both sides intermediate position respectively with one side fixed connection of two handles 17, the lag has been cup jointed to the surface of handle 17, the both sides of outer container 1 bottom respectively with one side fixed connection of four footing 18, and all set up the hole groove that the cooperation bolt used on four footing 18.

As shown in FIG. 5, the power supply is rectified, filtered and directly sent to a primary side of a T, in the figure, R4, R5, D8, D9 and Q1 form a self-starting circuit which only works during starting and feedback, then a self-feeding circuit formed by N3, D12 and C4 provides working voltage for a chip, a drain clamping circuit formed by D10 and D11 can absorb spike voltage generated by primary leakage inductance of a high-frequency transformer when VT is turned off to protect VT from damage, R10 and C8 are external timing resistors and timing capacitors of LT1247, different switching frequencies can be obtained by adjusting the values of the external timing resistors and the timing capacitors, a voltage stabilizing circuit formed by an adjustable precise parallel voltage regulator TL431 and a linear optical coupler PC817A is used for forming a voltage stabilizing circuit, when the output voltage of a secondary side increases due to faults or load reduction, the TL431 is conducted, the voltage of a 2 pin is increased through the optical coupler, the PWM pulse width of a 6 pin is narrowed, and the output is kept unchanged, wherein R9, C6, R17, C10 and C11 are, the detection resistor R8 can realize the pulse peak current limit one by one, so the output overcurrent or short circuit protection of the switch power supply can be realized, D13 and C9 are output rectifying filter elements, the secondary side in the single-ended flyback circuit can not be opened, so a dummy load R13 is added, the efficiency of the intrinsic safety power supply is greatly improved, a power frequency transformer is omitted in the circuit, the single-ended flyback converter is directly used, the electrical isolation can be well realized, the multi-path output can be realized, the size is greatly reduced, the weight is lightened, and the design of a portable intrinsic safety product is facilitated.

The utility model discloses a control mode comes automatic control through the controller, and the control circuit of controller can realize through the simple programming of technical staff in this field, and the supply also belongs to the common general knowledge in this field, and the utility model discloses mainly used protects mechanical device, so the utility model discloses no longer explain control mode and circuit connection in detail.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a safety protection power module, includes outer container (1), inner box (2), coupling part (3), supporting part (4), water absorbent resin (5), tinfoil (6), dust screen (8), cooling fan (9), apron (10), sealing strip (11), lug (12), electrothermal tube (14), fire-retardant rock wool (15), handle (17) and footing (18), its characterized in that: the inner box (2) is positioned in the outer box (1), the connecting part (3) and the supporting part (4) are positioned in a gap between the outer box (1) and the inner box (2), the connecting part (3) and the supporting part (4) are fixedly connected, the periphery of the inner side wall of the inner box (2) is fixedly connected with one side of water-absorbent resin (5) respectively, the inside of the water-absorbent resin (5) is in a saturated state, the other side of the water-absorbent resin (5) is fixedly connected with one side of tin foil (6) through glue, heat dissipation holes (7) are formed in the middle positions of the front surface and the back surface of the outer box (1), the heat dissipation holes (7) are communicated with the inside of the inner box (2), the inner side wall of each heat dissipation hole (7) is fixedly connected with the outer side wall of a dust screen (8), one side of the inner wall of the inner box (2) is fixedly connected with one side of a heat dissipation fan (9, the heat dissipation fan (9) and the heat dissipation holes (7) are located at the same position.

2. A safety protected power supply module as claimed in claim 1, wherein: the connecting part (3) and the supporting part (4) are both of rubber structures, the connecting part (3) is a transverse straight edge, the supporting part (4) is a staggered oblique edge, the connecting part (3) and the supporting part (4) are connected in a staggered mode, and the connecting part (3) and the supporting part (4) are of an integrally formed structure.

3. A safety protected power supply module as claimed in claim 1, wherein: the periphery of the bottom of the cover plate (10) is fixedly connected with the periphery of the top of the sealing strip (11) respectively, and the periphery of the top of the inner box (2) is provided with a groove (13) matched with the sealing strip (11) for use.

4. A safety protected power supply module as claimed in claim 1, wherein: the utility model discloses a fire-retardant rock wool fire-fighting cover plate, including apron (10), the top fixed connection of intermediate position and lug (12) of apron (10) bottom, the both sides of lug (12) inner wall respectively with the both ends fixed connection of electrothermal tube (14), the bottom of lug (12) and the top fixed connection of fire-retardant rock wool (15), through-hole (16) have been seted up to the bottom of lug (12), through-hole (16) are in the feed through state with fire-retardant rock wool (15).

5. A safety protected power supply module as claimed in claim 1, wherein: outer container (1) and inner box (2) are integrated into one piece structure, and outer container (1) and inner box (2) are the aluminum alloy structure.

6. A safety protected power supply module as claimed in claim 1, wherein: the top of the middle positions of the two sides of the outer box (1) are respectively fixedly connected with one side of the two handles (17), and the outer surfaces of the handles (17) are sleeved with the protecting sleeves.

7. A safety protected power supply module as claimed in claim 1, wherein: the two sides of the bottom of the outer box (1) are fixedly connected with one sides of the four bottom feet (18) respectively, and hole grooves matched with bolts for use are formed in the four bottom feet (18).