CN113224477A

CN113224477A - Protection device for battery bulging

Info

Publication number: CN113224477A
Application number: CN202110503734.1A
Authority: CN
Inventors: 周霞瑛; 朱昕玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-08-06

Abstract

A battery bulge protection device comprises a protection shell, a main body cavity is arranged in the protection shell, the main body cavity comprises a central cavity, an even number of track accommodating grooves are formed in the periphery of the central cavity, a plurality of packaged batteries are arranged in the central cavity, elastic heat dissipation cushion layers are arranged at two ends of the height direction of the packaged batteries, sealing covers are arranged at two ends of the height direction of the main body cavity, at least one sealing cover is provided with a contact switch, positive and negative output positioning blocks are arranged on the outer side surfaces of the packaged batteries and are electrically connected with the contact switch to form a series circuit, track assemblies are arranged in the four track accommodating grooves and comprise insulating sheets and conductive positioning pieces, the insulating sheets are arranged between the conductive positioning pieces and the protection shell, elastic cushion layer positioning grooves are formed in the four conductive positioning pieces, two positioning ends are formed in the peripheral side wall of the elastic heat dissipation cushion layer, output block positioning grooves are formed in the four conductive positioning pieces, the positive positioning pieces, The negative output block can be accommodated in the output block positioning groove and can reciprocate up and down. The safety of the operation of the whole equipment and the circuit is guaranteed.

Description

Protection device for battery bulging

Technical Field

The invention belongs to the technical field of battery protection devices, and particularly relates to a battery bulging protection device.

Background

With the rapid development of technology, batteries are widely used in various fields of industrial production and daily life, and with the rapid development of new energy vehicles in recent years, batteries have become the most important power units and components of pure electric vehicles, and in order to obtain high voltage, a plurality of packaged batteries are generally required to be grouped into a circuit for use. However, when the batteries in the electric vehicle are tightly arranged and the batteries swell, the deformation pressure of the batteries affects the connection strips and other batteries, and when the batteries swell seriously, the batteries can be damaged or the connection strips are broken or the batteries are burnt or exploded, so that the batteries are dangerous when being charged continuously. In order to solve the problem, existing manufacturers make many beneficial attempts, but the current battery swelling protection devices are all focused on realizing the lifetime protection of the battery, that is, effective protection is performed only when the battery swells and cannot be used or is damaged, which not only causes unnecessary loss due to further damage of the battery after swelling, but also causes fire alarm due to damage of some batteries, especially high-energy-density batteries such as lithium batteries, which further causes unnecessary life and property loss around the batteries.

In view of the above-mentioned prior art, the applicant has made an advantageous design, and the technical solutions described below have been made in this context.

Disclosure of Invention

The invention aims to provide a battery bulging protection device which is simple in structure, reliable and durable, is beneficial to ensuring that a circuit is timely disconnected when the bulging of a packaged battery exceeds a design range so as to prevent the packaged battery from being further damaged to cause unnecessary loss and improve the safety, is beneficial to ensuring that the operation reliability of the whole device can not be easily disconnected when the reasonable bulging deformation quantity of the packaged battery occurs and does not exceed the design range, and is convenient to prevent the deformation pressure of the bulging of the packaged battery from influencing a connecting strip and other batteries through a protection shell so as to ensure the safety of the operation of the whole device and the circuit.

The invention aims to achieve the aim that a battery bulging protection device comprises a protection shell, a main body cavity penetrating through the height direction of the protection shell is formed in the protection shell, the main body cavity comprises a central cavity, the central cavity is arranged at the center of the protection shell and penetrates through the height direction of the protection shell, a plurality of even number of track accommodating grooves symmetrically arranged in pairs are formed around the central cavity, a plurality of packaged batteries are arranged in the central cavity, the packaged batteries are arranged along the height direction of the central cavity, an elastic heat dissipation cushion layer capable of realizing reciprocating telescopic motion can be arranged at the end parts of the two end parts of the packaged batteries in the height direction according to requirements, two sealing covers are respectively and fixedly arranged at the two end parts of the main body cavity in the height direction, and a contact switch is fixedly arranged on at least one of the two sealing covers, the contact force bearing surface of the contact switch is contacted with an elastic heat dissipation cushion layer arranged at one end of a main body cavity in the height direction, a plurality of positive output positioning blocks and negative output positioning blocks which are mutually symmetrical about the central line of the vertical direction of the packaged battery and have the same shape and size are formed on the outer side surface of the packaged battery, the plurality of positive output positioning blocks and negative output positioning blocks of the packaged battery are electrically connected with the contact switch through leads to form a series circuit capable of outputting outwards, a track assembly is arranged in each of four track accommodating grooves of the main body cavity and comprises an insulating sheet and a conductive positioning piece, the insulating sheets are arranged between the conductive positioning pieces and a protective shell, and an elastic cushion layer positioning groove is formed on each of the four conductive positioning pieces and at the position corresponding to the elastic heat dissipation cushion layer, the peripheral lateral wall of elasticity heat dissipation bed course is formed with two location ends about this elasticity heat dissipation bed course's radial centerline symmetry and these two location ends all can hold in this elasticity bed course constant head tank and can carry out reciprocating motion from top to bottom wherein, and four on the electrically conductive setting element and corresponding to positive pole output piece or negative pole output piece's position department has all seted up the output piece constant head tank, positive pole output piece or negative pole output piece all can hold in this output piece constant head tank and can carry out reciprocating motion from top to bottom wherein.

In a specific embodiment of the present invention, a heat dissipation channel is formed in the main cavity of the protection housing and in a space between the connection portion corresponding to the two adjacent rail receiving grooves and the packaged battery, and a plurality of temperature sensing elements are fixedly mounted in the heat dissipation channel.

In another specific embodiment of the present invention, the elastic heat dissipation cushion includes a positioning barrel, a telescopic matching barrel and a spring, the positioning barrel and the telescopic matching barrel are installed together in a matching manner, a positioning barrel hollow cavity is formed in the positioning barrel in a hollow manner, one axial end of the positioning barrel is in an open mouth shape, a pair of insulating positioning blocks is convexly arranged on the circumferential outer side wall of the positioning barrel, the pair of insulating positioning blocks are symmetrically arranged with respect to the radial center line of the positioning barrel, the pair of insulating positioning blocks are respectively accommodated in the elastic cushion layer positioning grooves of the two opposite conductive positioning elements and can realize vertical reciprocating movement in the elastic cushion layer positioning grooves, the telescopic matching barrel is also hollow in the same interior and is formed with a telescopic matching hollow cavity, the axial direction of the telescopic matching barrel is in an open mouth shape towards one end of the positioning barrel, and the radial diameter of the telescopic matching barrel is smaller than the radial diameter of the positioning barrel hollow cavity of the positioning barrel, so that the positioning barrel and the positioning barrel are in a radial diameter so as to enable the telescopic matching barrel and the positioning barrel to be in a radial direction The telescopic matching barrel can be accommodated in the hollow cavity of the positioning barrel, the spring is arranged in the hollow cavity of the telescopic matching barrel and is in contact matching with the circumferential side wall of the telescopic matching barrel, the other end of the spring is arranged on one side panel of the positioning barrel opposite to the opening end of the positioning barrel in a supporting way, a pair of locking blocks are convexly arranged on the outer side surface of the circumferential side wall plate of the telescopic matching barrel and at the end part close to the opening of the telescopic matching barrel in the height direction, the pair of locking blocks are symmetrically arranged along the radial center line of the telescopic matching barrel, a pair of locking matching grooves are formed on the circumferential plate of the positioning barrel, the locking matching grooves are symmetrically arranged relative to the radial center line of the positioning barrel and penetrate through the thickness direction of the circumferential side wall plate of the positioning barrel, the locking piece of flexible cooperation cask with the locking cooperation groove can realize mutually supporting the locking just the locking piece can realize reciprocating sliding from top to bottom in this locking cooperation groove.

In another specific embodiment of the present invention, the locking engagement groove includes a probing groove, a turning groove and a retractable groove, the probing groove extends from a position of the circumferential side wall plate of the positioning barrel near one end of the retractable engagement barrel along the vertical direction, and the one end of the probing groove near the height direction of the circumferential side wall plate of the positioning barrel forms an open end, the turning groove extends from a position of a proximal end of the probing groove far away from the open end along the horizontal direction, and the turning groove is communicated with the probing groove, the retractable groove extends from a position of the end of the turning groove far away from the probing groove along the vertical direction, the retractable groove is communicated with the turning groove, and the retractable groove is not communicated with the end of the circumferential side wall plate of the positioning barrel along the height direction to form an open end, the steering groove is arranged at the position of the proximal end part of one end of the barrel panel close to the positioning barrel, the locking block can slide in the probing groove of the locking matching groove, the steering groove and the telescopic groove, and when the positioning barrel is mutually matched and connected with the telescopic matching barrel, the locking block is locked and installed in the telescopic groove and performs vertical reciprocating motion in the telescopic groove.

In another specific embodiment of the present invention, the contact switch includes a conductive drum membrane, two insulating spacers, two conductive members and an insulating base, which are fixedly connected together in sequence, a stressed base is disposed at a position on a side of the insulating base opposite to the conductive members, the conductive drum membrane includes a conductive drum membrane accommodating plate in an elliptical plate shape, an elastic conductive drum membrane in a spherical plate shape is mounted on the conductive drum membrane accommodating plate, two semicircular conductive drum membrane accommodating plate ear seats are respectively formed at two ends of a long axis of the conductive drum membrane accommodating plate, the two insulating spacers are also in a semicircular plate shape, the two insulating spacers are respectively disposed at positions of the conductive drum membrane accommodating plate ear seats, the two conductive members are both in a semicircular elliptical plate shape, and a conductive drum membrane spherical contact cavity is formed at a position of the conductive member corresponding to the elastic conductive drum membrane, the insulating base is also in an elliptical plate shape structure, a conductive tympanic membrane accommodating cavity is formed in the center of the insulating base, the stressed base comprises a stress plate in a circular plate shape structure, the stress plate is contacted with an elastic heat dissipation cushion layer arranged at one end of the height direction of the main body cavity, a conductive tympanic membrane positioning rod is formed in the center of one side surface of the elastic heat dissipation cushion layer opposite to the conductive tympanic membrane part, the conductive tympanic membrane positioning rod extends along the vertical direction and sequentially penetrates through the conductive tympanic membrane accommodating cavity and the conductive tympanic membrane spherical contact cavity, the height direction of the conductive tympanic membrane positioning rod is far away from one end of the stress plate and contacted with the elastic conductive tympanic membrane, when the contact switch is in a conduction state, the stressed base protrudes out of the insulating base, the elastic conductive tympanic membrane of the conductive tympanic membrane part is sunken towards the conductive membrane part and is contacted with the inner side surface of the conductive tympanic membrane spherical contact cavity of the conductive member, so that a circuit is realized When the contact switch is in an off state, the stress plate of the stress base keeps a flat state with the surface of one side of the insulating base, and at the moment, the elastic conductive tympanic membrane protrudes outwards away from the conductor part and is not contacted with the inner side surface of the spherical contact cavity of the conductive tympanic membrane of the conductor part, so that the circuit is disconnected.

In another specific embodiment of the present invention, a receiving plate ear seat fixing hole penetrating through the thickness direction of each of the two conductive tympanic membrane receiving plate ear seats is formed, an insulating gasket fixing hole penetrating through the thickness direction of each of the two insulating gaskets is formed at a position corresponding to the respective receiving plate ear seat fixing hole, a conductor ear seat is also formed at an end of each of the two conductors far away from the spherical contact cavity, a conductor ear seat penetrating through the thickness direction of each of the two conductors is formed at a position corresponding to the respective receiving plate ear seat fixing hole, an insulating base ear seat is also formed at an end of each of the two long axes of the insulating base, and an insulating base ear seat fixing hole penetrating through the thickness direction of each of the two insulating base ear seats is formed at a position corresponding to the respective opposite conductor ear seat fixing hole, and a fastener is arranged in the holding plate lug seat fixing hole in a matched mode, the fastener penetrates through the holding plate lug seat fixing hole, the insulating gasket fixing hole and the conductor lug seat fixing hole in sequence and then probes into the insulating base lug seat fixing hole to realize the connection and fixation of the conductive film bulging piece, the insulating gasket, the conductor piece and the insulating base, and the fastener can realize the fixed installation of the contact switch and the sealing cover by the connection and fixation of the sealing cover.

Due to the adoption of the structure, compared with the prior art, the invention has the beneficial effects that: the elastic heat dissipation cushion layer capable of realizing reciprocating telescopic motion is arranged at the end parts of the two ends of the height direction of the packaged battery according to requirements, and the contact switch is arranged at least at one end of the end part of the two ends of the protection shell in the height direction, so that when the overall environmental temperature rises, the packaged battery begins to bulge and deform, the elastic heat dissipation cushion layer can stretch along with the bulging of the packaged battery and can stretch and recover along with the recovery of the packaged battery, and therefore when the packaged battery has reasonable bulging deformation quantity and does not exceed the design range, the operation reliability of the overall device can be guaranteed, a circuit cannot be easily disconnected, and unnecessary troubles are avoided; when the bulging deformation amount of the packaged battery exceeds the designed range, the elastic heat dissipation cushion layer is compressed to the limit, the elastic heat dissipation cushion layer gradually transmits the deformation amount to the contact switch at one end of the height direction of the protection shell, the stress point of the contact switch is triggered and can be automatically disconnected to realize the disconnection of the connection circuit, the structure is simple, the structure is reliable and durable, on one hand, the protection requirement of the interior of the packaged battery can be effectively reduced, the low-cost manufacturing of the packaged battery is realized, the production cost is effectively reduced, on the other hand, the circuit can be timely disconnected when the packaged battery is excessively bulged, the packaged battery can be protected, and a user can be quickly reminded that the battery is damaged and needs to be timely replaced, so that the user can effectively recover the packaged battery before the packaged battery is damaged, and the packaged battery is prevented from further damage to cause unnecessary loss, greatly improves the safety and embodies the advantages of environmental protection.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is an exploded perspective view of an embodiment of the present invention.

Fig. 3 is an exploded perspective view of the elastic cushion according to the present invention.

Fig. 4 is an exploded perspective view of the contact switch of the present invention.

Fig. 5 is a schematic structural diagram of the contact switch shown in fig. 4 in a conducting state.

Fig. 6 is a schematic structural view of the contact switch shown in fig. 5 in an open state.

In the figure: 1. the temperature sensor comprises a protective shell, 11, a main body cavity, 111, a central cavity, 112, a track accommodating groove, 12, a sealing cover, 13, a heat dissipation pore channel, 14 and a temperature sensing part; 2. packaging a battery, 21, a positive electrode output positioning block, 22, a negative electrode output positioning block; 3. elastic heat dissipation cushion layer, 31, positioning barrel, 311, hollow cavity of positioning barrel, 312, insulating positioning block, 313, locking matching groove, 3131, probing groove, 3132, steering groove, 3133, telescopic groove, 32, telescopic matching barrel, 321, hollow cavity of telescopic matching barrel, 322, locking block, 33, spring; 4. the contact switch comprises a contact switch 41, a conductive drum membrane piece 411, a conductive drum membrane containing plate 412, an elastic conductive drum membrane 413, a conductive drum membrane containing plate lug seat 4131, a containing plate lug seat fixing hole 42, an insulating gasket 421, an insulating gasket fixing hole 43, a conductor piece 431, a conductive drum membrane spherical contact cavity 432, a conductor piece lug seat 4321, a conductor piece lug seat fixing hole 44, an insulating base 441, a conductive drum membrane containing cavity 442, an insulating base lug seat 4421, an insulating base lug seat fixing hole 45, a stress base 451, a stress plate 452, a conductive drum membrane positioning rod 46 and a fastener; 5. the track assembly, 51, an insulating sheet, 52, a conductive positioning piece, 521, an elastic cushion layer positioning groove, 522 and an output block positioning groove.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.

In the following description, any concept related to the directions or orientations of up, down, left, right, front, and rear is based on the position state of the corresponding drawings, and thus, it should not be understood as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1 and 2 and fig. 3 to 6, a protection device for battery swelling is shown, which includes a protection housing 1, a main body cavity 11 formed in the protection housing 1 and penetrating through the height direction thereof, a central cavity 111 formed in the middle of the main body cavity 11, the central cavity 111 extending from the center of the upper end surface to the center of the lower end surface of the protection housing 1 along the height direction thereof, and a plurality of even number of rail receiving grooves 112 formed around the central cavity 111, as shown in fig. 2, the number of the rail receiving grooves 112 is four, the cross section of the main body cavity 11 is formed in a clover shape, a plurality of packaged batteries 2 are mounted in the central cavity 111, the packaged batteries 2 are disposed along the height direction of the central cavity 111, it should be noted that the number of the rail receiving grooves 112 is four, certainly, the number can be increased or reduced according to the actual use requirement, at least one pair is provided, or a plurality of pairs are added for standby use to improve the flexibility of the series circuit of the packaged batteries 2, the number of the packaged batteries 2 is multiple, specifically three, and two ends of the packaged batteries 2 in the height direction are respectively provided with an elastic heat dissipation cushion 3 capable of doing reciprocating telescopic motion, the elastic heat dissipation cushion 3 can be used for positioning and separating the packaged batteries 2 in the central cavity 111, and the elastic heat dissipation cushion 3 can be compressed and has a good heat dissipation effect; in the present embodiment, a contact switch 4 is fixedly mounted on the sealing cover 12 at the upper end, a contact force-bearing surface of the contact switch 4 can be attached to the elastic heat dissipation cushion 3 at the upper end of the main body cavity 11, and a switch circuit for realizing internal circuit connection and an outward output port circuit can be mounted on the sealing cover 12 at the lower end, so that the purpose of the arrangement is to provide a contact switch 4 which can effectively reduce the cost and facilitate the connection of the output terminal to the circuit when the whole device is in the condition of cooling of the air cooling device, or to provide a contact switch 4 which can be mounted on the sealing cover 12 at the upper and lower ends of the main body cavity 11 when the upper part of the packaged battery 2 is heated and the lower part of the packaged battery 2 is more swollen or the center of the packaged battery 2 is not in the center region but is more swollen toward one side, the arrangement can ensure that the contact switch 4 is turned off in time after the deformation quantity of the packaged battery 2 reaches the set safety value when the packaged battery swells, so that the safety is further improved; a positive output positioning block 21 and a negative output positioning block 22 which are mutually symmetrical about the center line of the packaged battery 2 in the vertical direction and have the same shape and size are formed on the outer side surfaces of the plurality of packaged batteries 2, and the positive output positioning block 21 and the negative output positioning block 22 of the plurality of packaged batteries 2 are electrically connected with the contact switch 4 through wires to form a series circuit capable of outputting outwards; a track assembly 5 is installed in each of the four track accommodating grooves 112 of the main body cavity 11, the track assembly 5 includes an insulating sheet 51 and a conductive positioning member 52, the insulating sheet 51 is disposed between the conductive positioning member 52 and the protection housing 1, an elastic cushion positioning slot 521 is disposed on each of the four conductive positioning members 52 and at a position corresponding to the elastic heat dissipation cushion 3, two positioning ends symmetrical with respect to a radial center line of the elastic heat dissipation cushion 3 are formed on an outer peripheral sidewall of the elastic heat dissipation cushion 3 and can be accommodated in the elastic cushion positioning slot 521 and can reciprocate up and down therein, output block positioning slots 522 are disposed on each of the four conductive positioning members 52 and at a position corresponding to the positive output block 21 or the negative output block 22, and the positive output block 21 or the negative output block 22 can be accommodated in the output block positioning slots 522 and can enter therein The packaged batteries 2 located at the upper and lower ends in the main body cavity 11 are mounted on the conductive positioning members 52 at the left and right sides, and the packaged battery 2 located at the middle part in the main body cavity 11 is mounted on the conductive positioning members 52 at the front and rear sides by twisting 90 °, as shown in fig. 2, at this time, the three packaged batteries 2 are formed into a series circuit and the voltage multiplication can be realized compared with the case where all the three packaged batteries 2 are mounted on the conductive positioning members 52 at the left and right sides, and the conductive positioning members 52 of the four sets of rail assemblies 5 can also be connected with the conductor end of the contact switch 4 at the upper end and the switch on the sealing cover 12 at the lower end to form a series circuit for outputting to the outside. In addition, the height of the output block positioning slot 522 is greater than the heights of the positive output positioning block 21 and the negative output positioning block 22, and since the packaged batteries 2 at the two ends overlap the bulging displacement of the packaged battery 2 at the middle portion, the height of the output block positioning slot 522 at the two ends of the protective casing 1 is greater than the height of the output block positioning slot 522 at the middle portion, so that the range of motion of the positive output positioning block 21 and the negative output positioning block 22 of the packaged battery 2 at the middle portion is the smallest, the range of motion of the positive output positioning block 21 and the negative output positioning block 22 of the packaged batteries 2 at the two ends is relatively increased, and when the number of the packaged batteries 2 exceeds three, the range of motion of the positive output positioning block 21 and the negative output positioning block 22 of the packaged battery 2 is gradually increased from the middle portion to the two ends.

In the present embodiment, the protection casing 1 has a vertical rectangular parallelepiped shape, which has the advantages of being firmly fixed and not easy to move, the cross section of the main body cavity 11 is configured to be clover-shaped, the central cavity 111 is configured to be a cylindrical cavity, and the packaged battery 2 has a cylindrical shape and has the advantages of being easy to bulge, long in service life and convenient to manufacture; of course, the shapes of the protection casing 1 and the packaged battery 2 are not limited by this, and a user can make corresponding changes according to actual needs, for example, the protection casing 1 and the packaged battery 2 are in a cylindrical shape or a hexagonal prism shape, and the protection casing 1 can prevent the deformation pressure of the packaged battery 2 from affecting the connecting strips and other batteries under the condition of swelling, thereby further improving the safety of the whole device.

Further, a heat dissipation duct 13 is formed at the four corner connection point in the main body cavity 11 of the protection housing 1 and in the space between the connection point corresponding to the two adjacent rail receiving grooves 112 and the packaged battery 2, the number of the heat dissipation ducts 13 is four, the inner side wall surface of the heat dissipation duct 13 is a threaded surface, and a plurality of temperature sensing pieces 14 are fixedly mounted in the four heat dissipation ducts 13.

Referring to fig. 3 in combination with fig. 1 and 2, the elastic heat dissipation cushion 3 includes a positioning barrel 31, a telescopic matching barrel 32 and a spring 33, the positioning barrel 31 and the telescopic matching barrel 32 are installed together in a matching manner, a positioning barrel hollow cavity 311 is formed in the positioning barrel 31 in a hollow manner, one end of the positioning barrel 31 in the axial direction is in an open mouth shape, a pair of insulation positioning blocks 312 is formed on the circumferential outer side wall of the positioning barrel 31 in a protruding manner, the pair of insulation positioning blocks 312 are symmetrically arranged with respect to the radial center line of the positioning barrel 31, the pair of insulation positioning blocks 312 are respectively accommodated in the elastic cushion layer positioning grooves 521 of the two opposite conductive positioning elements 52 and can realize the up-and-down reciprocating motion therein, the telescopic matching barrel 32 is also hollow, a telescopic matching barrel hollow cavity 321 is formed in the same hollow manner, and one end of the positioning barrel 31 in the axial direction is in an open mouth shape, the radial diameter of the telescopic matching barrel 32 is smaller than the radial diameter of the hollow cavity 311 of the positioning barrel 31, so that the telescopic matching barrel 32 can be accommodated in the hollow cavity 311 of the positioning barrel, in this embodiment, the radial diameter of the telescopic matching barrel 32 is smaller than the radial diameter of the positioning barrel 31 by two wall thickness dimensions of the circumferential side wall plate of the positioning barrel 31, the spring 33 is disposed in the hollow cavity 321 of the telescopic matching barrel, the spring 33 is in contact fit with the circumferential side wall of the telescopic matching barrel 32, the other end of the spring 33 is supportingly disposed on a side panel of the positioning barrel 31 opposite to the open end thereof, a pair of locking blocks 322 are convexly disposed on the outer side surface of the circumferential side wall plate of the telescopic matching barrel 32 and at the position close to the open end of the telescopic matching barrel 32 in the height direction, the pair of locking blocks 322 are symmetrically arranged along the radial central line of the telescopic matching barrel 32, a pair of locking matching grooves 313 are formed on the circumferential side wall plate of the positioning barrel 31, the pair of locking matching grooves 313 are symmetrically arranged about the radial central line of the positioning barrel 31 and penetrate through the thickness direction of the circumferential side wall plate of the positioning barrel 31, the locking blocks 322 of the telescopic matching barrel 32 and the locking matching grooves 313 can be matched and locked with each other, and the locking blocks 322 can slide up and down in the locking matching grooves 313 in a reciprocating manner.

In this embodiment, the thickness and the amount of expansion of the elastic heat dissipation cushion 3 are not limited, and the user can calculate the most suitable thickness and the amount of expansion of the elastic heat dissipation cushion 3 in advance according to the shape and the volume of the packaged battery 2, thereby effectively ensuring the service life and the safety of the packaged battery 2.

Further, the locking groove 313 includes a probing groove 3131, a turning groove 3132, and a telescopic groove 3133, the probing groove 3131 extends vertically from a position of the circumferential side wall plate of the positioning drum 31 close to the one end of the telescopic drum 32, the probing groove 3131 forms an opening end close to the one end of the circumferential side wall plate of the positioning drum 31 in the height direction, the turning groove 3132 extends horizontally from a position of the proximal end of the probing groove 3131 away from the opening end, the turning groove 3132 is in communication with the probing groove 3131, the telescopic groove 3133 extends vertically from the end of the turning groove 3132 in the length direction away from the probing groove 3131, the telescopic groove 3133 is in communication with the turning groove 3132, and the telescopic groove 3133 is not open to the end of the circumferential side wall plate of the positioning drum 31 in the height direction, the deflecting groove 3132 is provided in the proximal end portion of the telescopic groove 3133 close to the end face of the positioning drum 31, and the locking block 322 is slidable in the insertion groove 3131, the deflecting groove 3132, and the telescopic groove 3133 of the locking groove 313, and when the positioning drum 31 and the telescopic matching drum 32 are fitted to each other, the locking block 322 is locked in the telescopic groove 3133 and reciprocates vertically therein. During installation, the locking block 322 of the telescopic matching barrel 32 is pressed from the opening end of the probing groove 3131 to the end of the probing groove 3131, at this time, the spring 33 is compressed, then the telescopic matching barrel 32 is rotated to enable the locking block 322 to enter the steering groove 3132 and to enter the telescopic groove 3133 after rotating for a certain angle in the horizontal direction, at this time, the telescopic matching barrel 32 is released to enable the spring 33 to be opened, the telescopic matching barrel 32 moves under the action of the spring 33 and the locking block 322 moves to the sealing end of the telescopic groove 3133, when the packaged battery 2 swells, the locking block 322 moves up and down in the telescopic groove 3133 and the positioning barrel 31 and the telescopic matching barrel 31332 can freely stretch in the range of the up-down distance of the telescopic groove 3, and the stretching amplitude of the elastic heat dissipation cushion 3 in the middle part is greater than the stretching amplitudes of the elastic heat dissipation cushion 3 at the upper and lower ends, that is, the stretching amplitudes of the elastic heat dissipation cushion 3 at the upper and lower ends follow the expanding of the packaged battery 2 Gradually decreases and decreases, and the accumulated expansion and contraction amount of all the elastic heat dissipation cushion layers 3 corresponds to the safe bulging displacement amount of all the packaged batteries 2 in the main body cavity 11.

Referring to fig. 4 to 6, the contact switch 4 includes a conductive drum film 41, two insulating spacers 42, two conductive members 43 and an insulating base 44 fixedly connected together in sequence, and a force-receiving base 45 is disposed at a position on a side of the insulating base 44 opposite to the conductive members 43, the conductive drum film 41 includes a conductive drum film accommodating plate 411 having an elliptical plate shape, an elastic conductive drum film 412 having a spherical sheet shape is mounted on the conductive drum film accommodating plate 411, and two conductive drum film accommodating plate ear seats 413 having a semicircular plate shape are respectively formed at two ends of a major axis of the conductive drum film accommodating plate 411, the two insulating spacers 42 are also having a semicircular plate shape, and the two insulating spacers 42 are respectively disposed at positions of the conductive drum film accommodating plate ear seats 413, the two conductive members 43 are both having a semicircular plate shape, a conductive tympanic membrane spherical contact cavity 431 is formed at a position of the conductor 43 corresponding to the elastic conductive tympanic membrane 412, the insulation base 44 is also in an elliptical plate shape and a conductive tympanic membrane accommodating cavity 441 is formed at a central position thereof, the stress base 45 includes a stress plate 451 in a circular plate shape, the stress plate 451 is contacted with the elastic heat dissipation cushion 3 disposed at one end of the body cavity 11 in the height direction, a conductive tympanic membrane positioning rod 452 is formed at a central position of a side surface of the elastic heat dissipation cushion 3 opposite to the conductive tympanic membrane 41, the conductive tympanic membrane 452 extends along the vertical direction and sequentially passes through the conductive tympanic membrane accommodating cavity 441 and the conductive spherical tympanic membrane contact cavity 431, and an end of the conductive tympanic membrane positioning rod 452 far away from the stress plate 451 in the height direction is contacted with the elastic conductive tympanic membrane 412, as shown in fig. 5, when the contact switch 4 is in the on state, the force-receiving base 45 protrudes from the insulating base 44, and the elastic conductive drum 412 of the conductive drum 41 is recessed toward the conductor 43 and contacts with the inner side of the conductive drum spherical contact cavity 431 of the conductor 43, so as to conduct the circuit, as shown in fig. 6, when the contact switch 4 is in the off state, the force-receiving plate 451 of the force-receiving base 45 is in a flat state with one side surface of the insulating base 44, and at this time, the elastic conductive drum 412 protrudes outward away from the conductor 43 and does not contact with the inner side of the conductive drum spherical contact cavity 431 of the conductor 43, so as to disconnect the circuit.

In the present embodiment, a receiving lug fixing hole 4131 penetrating through the thickness direction of the two conductive tympanic membrane receiving lugs 413 is formed, an insulating pad fixing hole 421 penetrating through the thickness direction of the two conductive lugs is formed on each of the two insulating pads 42 and at a position corresponding to the respective receiving lug fixing hole 4131, a conductor lug 432 is also formed on each of the two conductive members 43 at an end portion away from the spherical contact cavity 431, a conductor lug fixing hole 4321 penetrating through the thickness direction of the conductive member is formed on each of the conductor lugs 432 and at a position corresponding to the respective receiving lug fixing hole 4131, an insulating base lug 442 is also formed on each of the two end portions of the long axis of the insulating base 44, and an insulating base lug fixing hole 4421 penetrating through the thickness direction of the insulating base lug 442 and at a position corresponding to the respective corresponding conductor lug fixing hole 4321 is formed on each of the insulating base lug 442, a fastening member 46 is disposed in the receiving plate ear seat fixing hole 4131, the fastening member 46 penetrates the receiving plate ear seat fixing hole 4131, the insulating gasket fixing hole 421 and the conductor ear seat fixing hole 4321 in sequence and then protrudes into the insulating base ear seat fixing hole 4421 to realize the connection and fixation of the conductive film member 41, the insulating gasket 42, the conductor member 43 and the insulating base 44, and the fastening member 46 can realize the connection and fixation with the sealing cover 12 to realize the fixed installation of the contact switch 4 and the sealing cover 12.

Referring to fig. 1 to fig. 6, the applicant briefly describes the working principle of the technical solution provided by the present invention: the packaged batteries 2 installed in the central cavity 111 of the protection casing 1 are electrically connected with the contact switch 4 arranged at one end of the protection casing 1 through the positive output positioning block 21 and the negative output positioning block 22 of the packaged batteries to form a series circuit, and at this time, the contact switch 4 is in a conducting state, the elastic conductive drum 412 is sunken towards the conductor 43 and contacts with the inner side surface of the conductive drum spherical contact cavity 431 of the conductor 43 to realize the circuit conduction, when the overall environmental temperature rises, the packaged batteries 2 start to bulge and deform, when the bulge deformation of the packaged batteries 2 is within a designed range, the elastic heat dissipation cushion 3 can be normally compressed and can move in the elastic cushion positioning groove 521 at the insulating positioning block 312 of the positioning barrel 31, and the elastic heat dissipation cushion 3 can recover along with the shrinkage of the packaged batteries 2, when the bulging deformation amount of the packaged battery 2 exceeds the designed range, the elastic heat dissipation cushion 3 is compressed to the limit, at the moment, the elastic heat dissipation cushion 3 gradually transmits the deformation amount to the contact switch 4 at one end of the height direction of the protection shell 1, at the moment, the stress plate 451 of the stress base 45 is stressed to move to be in a flat state with the surface of one side of the insulation base 44, and the elastic conductive drum membrane 412 is ejected out and protrudes outwards towards the direction far away from the conductor 43, so that the elastic conductive drum membrane 412 is contacted with the inner side surface of the conductive drum membrane spherical contact cavity 431 of the conductor 43, the disconnection of the contact switch 4 is realized, the whole series circuit is disconnected, the packaged battery 2 is effectively protected, and the safety is greatly improved.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. A battery bulge protection device, characterized by: the protective casing comprises a protective casing (1), a main body cavity (11) penetrating through the protective casing (1) in the height direction is formed in the protective casing (1), the main body cavity (11) comprises a central cavity (111), the central cavity (111) is arranged at the center of the protective casing (1) and penetrates through the height direction of the protective casing, a plurality of even number of track accommodating grooves (112) symmetrically arranged in pairs are formed around the central cavity (111), a plurality of packaged batteries (2) are installed in the central cavity (111), the packaged batteries (2) are arranged along the height direction of the central cavity (111), elastic heat dissipation cushion layers (3) capable of realizing reciprocating telescopic motion can be arranged at the end parts of the two ends of the packaged batteries (2) in the height direction according to requirements, and sealing covers (12) are fixedly installed at the two ends of the main body cavity (11) in the height direction respectively, and a contact switch (4) is fixedly installed on at least one of the two sealing covers (12), the contact force bearing surface of the contact switch (4) is contacted with an elastic heat dissipation cushion layer (3) arranged at one end of the height direction of the main body cavity (11), a positive output positioning block (21) and a negative output positioning block (22) which are mutually symmetrical and have the same shape and size are formed on the outer side surfaces of the plurality of packaged batteries (2), the positive output positioning block (21) and the negative output positioning block (22) of the plurality of packaged batteries (2) are electrically connected with the contact switch (4) through leads to form a series circuit capable of outputting outwards, a track assembly (5) is installed in each of the four track accommodating grooves (112) of the main body cavity (11), the track assembly (5) comprises an insulating sheet (51) and a conductive positioning piece (52), the insulation sheet (51) is arranged between the conductive positioning piece (52) and the protective shell (1), an elastic cushion layer positioning groove (521) is arranged on each of the four conductive positioning pieces (52) and at the position corresponding to the elastic heat dissipation cushion layer (3), two positioning ends which are symmetrical relative to the radial central line of the elastic heat dissipation cushion (3) are formed on the peripheral side wall of the elastic heat dissipation cushion (3) and can be contained in the elastic cushion positioning groove (521) and can reciprocate up and down in the elastic cushion positioning groove, output block positioning grooves (522) are respectively arranged on the four conductive positioning pieces (52) and at the positions corresponding to the positive output block (21) or the negative output block (22), the positive electrode output block (21) or the negative electrode output block (22) can be accommodated in the output block positioning groove (522) and can reciprocate up and down therein.

2. A battery swelling protection device according to claim 1, wherein a heat dissipating tunnel (13) is formed in the main body cavity (11) of said protection case (1) and in the space between the junction corresponding to the adjacent two rail receiving grooves (112) and the packaged battery (2), and a plurality of temperature sensing pieces (14) are fixedly mounted in said heat dissipating tunnel (13).

3. The battery swelling protection device according to claim 1, wherein the elastic heat dissipation cushion layer (3) comprises a positioning barrel (31), a telescopic matching barrel (32) and a spring (33), the positioning barrel (31) and the telescopic matching barrel (32) are installed together in a matching manner, a positioning barrel hollow cavity (311) is formed in the positioning barrel (31) in a hollow manner, one axial end of the positioning barrel hollow cavity is in an open mouth shape, a pair of insulation positioning blocks (312) are convexly formed on the circumferential outer side wall of the positioning barrel (31), the pair of insulation positioning blocks (312) are symmetrically arranged about the radial center line of the positioning barrel (31), the pair of insulation positioning blocks (312) are respectively accommodated in the elastic cushion layer positioning grooves (521) of the two opposite conductive positioning pieces (52) and can realize vertical reciprocating motion therein, the same inside cavity of flexible cooperation cask (32) is and is formed with cavity (321) and its axial orientation in the flexible cooperation cask location drum (31) one end is open mouth shape structure, and the radial diameter of this flexible cooperation cask (32) is less than the radial diameter of cavity (311) in the location cask of location cask (31) thereby makes this flexible cooperation cask (32) can be held in this location cask cavity (311), and spring (33) are set up in flexible cooperation cask cavity (321) and this spring (33) with the cooperation of pasting the contact is realized to the circumference lateral wall of flexible cooperation cask (32), and the other end of this spring (33) then sets up with bearing location cask (31) and its open mouth end on the relative side board, be close to in this flexible cooperation cask (32) open mouth's tip position department on the outside surface of the circumference lateral wall board of this flexible cooperation cask (32) and on its direction of height is close to in this flexible cooperation cask (32) open mouth end position department Establish and be formed with a pair of locking piece (322), this pair of locking piece (322) along the radial central line symmetry setting of flexible cooperation cask (32), just be formed with a pair of locking cooperation groove (313) on the circumference lateral wall board of location cask (31), this pair of locking cooperation groove (313) about the radial central line symmetry setting of location cask (31) just runs through the circumference lateral wall thickness direction of this location cask (31), locking piece (322) of flexible cooperation cask (32) with locking cooperation groove (313) can realize mutually supporting the locking just locking piece (322) can realize reciprocating sliding from top to bottom in this locking cooperation groove (313).

4. A battery swelling protection device according to claim 3, wherein said locking fitting groove (313) comprises a probing groove (3131), a diverting groove (3132) and a telescopic groove (3133), said probing groove (3131) is vertically extended from a position of a circumferential side wall plate of said positioning drum (31) near an end of said telescopic fitting drum (32), and an end of said probing groove (3131) near a height direction of said circumferential side wall plate of said positioning drum (31) is formed as an open end, said diverting groove (3132) is horizontally extended from a position of a proximal end of said probing groove (3131) far from the open end thereof, and said diverting groove (3132) is communicated with said probing groove (3131), and said telescopic groove (3133) is vertically extended from an end of said diverting groove (3132) far from said probing groove (3131), the telescopic groove (3133) and the turning groove (3132) are communicated with each other, the telescopic groove (3133) is not opened with the end part of the circumferential side wall plate of the positioning barrel (31) in the height direction, the turning groove (3132) is arranged at the position of one end part of the telescopic groove (3133) close to the barrel panel of the positioning barrel (31), the locking block (322) can slide in the probing groove (3131), the turning groove (3132) and the telescopic groove (3133) of the locking matching groove (313), and when the positioning barrel (31) is matched and connected with the telescopic barrel matching groove (32), the locking block (322) is locked and installed in the telescopic groove (3133) and moves up and down in the telescopic groove.

5. The battery bulge protector as claimed in claim 1, wherein the contact switch (4) comprises a conductive drum membrane (41), two insulating spacers (42), two conductor members (43) and an insulating base (44) which are fixedly connected together in sequence, a stressed base (45) is arranged at a position on one side of the insulating base (44) opposite to the conductor members (43), the conductive drum membrane (41) comprises a conductive drum membrane accommodating plate (411) in an elliptical plate shape, an elastic conductive drum membrane accommodating plate (412) in a spherical plate shape is mounted on the conductive drum membrane accommodating plate (411), conductive drum membrane accommodating plate ear seats (413) in a semicircular plate shape are respectively formed at two ends of a long axis of the conductive drum membrane accommodating plate (411), and the two insulating spacers (42) are also in a semicircular plate shape, two insulation gaskets (42) are respectively arranged at the positions of the ear seats (413) of the conductive tympanic membrane accommodating plates, two conductor pieces (43) are in a semi-elliptical plate shape structure, a conductive tympanic membrane spherical contact cavity (431) is formed at the position of the conductor piece (43) corresponding to the elastic conductive tympanic membrane (412), the insulation base (44) is also in an elliptical plate shape structure, a conductive tympanic membrane accommodating cavity (441) is formed at the center of the insulation base, the stress base (45) comprises a stress plate (451) in a circular plate shape structure, the stress plate (451) is contacted with the elastic heat dissipation cushion layer (3) arranged at one end of the height direction of the main body cavity (11) in an attaching manner, a conductive tympanic membrane positioning rod (452) is formed at the center of one side surface of the elastic heat dissipation cushion layer (3) opposite to the tympanic membrane piece (41), and the conductive tympanic membrane positioning rod (452) extends along the vertical direction and sequentially passes through the conductive tympanic membrane accommodating plates The conductive drum membrane positioning rod (452) is arranged in a cavity (441) and a conductive drum membrane spherical contact cavity (431), one end part of the conductive drum membrane positioning rod (452) far away from the stress plate (451) in the height direction is in contact with the elastic conductive drum membrane (412), when the contact switch (4) is in a conducting state, the stress base (45) protrudes out of the insulating base (44), the elastic conductive drum membrane (412) of the conductive drum membrane piece (41) is sunken towards the conductive piece (43) and is in contact with the inner side surface of the conductive drum membrane spherical contact cavity (431) of the conductive piece (43) so as to realize the conduction of a circuit, when the contact switch (4) is in a disconnecting state, the stress plate (451) of the stress base (45) is in a flat state with the surface of one side of the insulating base (44), and at the moment, the elastic conductive drum membrane (412) is far away from the conductive piece (43) and protrudes outwards and is not in contact with the inner side surface of the conductive drum membrane spherical contact cavity (431) of the conductive drum membrane contact piece (43) so as to realize the disconnection of the circuit And opening.

6. The device for protecting battery from bulging according to claim 5, wherein each of said two conductive tympanic membrane receiving lug seats (413) has a receiving lug seat fixing hole (4131) penetrating through the thickness direction thereof, and each of said two insulating spacers (42) has an insulating spacer fixing hole (421) penetrating through the thickness direction thereof at a position corresponding to the respective receiving lug seat fixing hole (4131), and each of the two conductive members (43) has a conductive member lug seat (432) also formed at an end portion thereof far from the spherical contact cavity (431), and each of said conductive member lug seats (432) has a conductive member lug seat fixing hole (4321) penetrating through the thickness direction thereof at a position corresponding to the respective receiving lug seat fixing hole (4131), and each of the two end portions of the long axis of said insulating base (44) has an insulating base lug seat (442) also formed thereon, and the insulating base ear seat (442) is provided with an insulating base ear seat fixing hole (4421) penetrating through the thickness direction thereof at the position corresponding to the conductor ear seat fixing hole (4321) respectively opposite to the insulating base ear seat fixing hole, a fastener (46) is arranged in the accommodating plate ear seat fixing hole (4131), the fastener (46) sequentially penetrates through the accommodating plate ear seat fixing hole (4131), the insulating gasket fixing hole (421) and the conductor ear seat fixing hole (4321) and then extends into the insulating base ear seat fixing hole (4421) to realize the connection and fixation of the conductive drum membrane element (41), the insulating gasket (42), the conductor element (43) and the insulating base (44), and the fastener (46) can realize the connection and fixation with the sealing cover (12) so as to realize the fixed installation of the contact switch (4) and the sealing cover (12).