CN108878692B

CN108878692B - Battery pack and communication equipment

Info

Publication number: CN108878692B
Application number: CN201810619578.3A
Authority: CN
Inventors: 钟正; 李兴粮; 何忠勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2018-06-15
Filing date: 2018-06-15
Publication date: 2020-12-15
Anticipated expiration: 2038-06-15
Also published as: CN108878692A

Abstract

The application provides a battery package and communications facilities, include the shell and locate one or more electric cores in the shell, it is a plurality of electricity is connected between the electric core. The battery cell is arranged in the shell, so that the battery cell is protected. And a heat dissipation structure is arranged on the box body of the shell, so that the heat dissipation of the battery cell is realized, and the damage to the battery pack caused by overhigh heat when the battery cell works is avoided. Meanwhile, the terminal and the explosion-proof valve which are easy to corrode are sealed in the accommodating cavity of the cover body through the sealing piece, so that corrosive gas or liquid and the like are prevented from entering the accommodating cavity of the cover body to corrode the terminal and the explosion-proof valve of the battery cell, the service life of the battery pack is further prolonged, and the service life of the communication equipment is further prolonged.

Description

Battery pack and communication equipment

Technical Field

The application relates to the field of power supplies, in particular to a battery pack and communication equipment.

Background

At present, batteries are applied more and more outdoors, the batteries are affected by factors such as high temperature, salt mist corrosion and the like when being applied outdoors, and if protection is not done, the service life of the batteries can be greatly affected. Therefore, the battery pack is protected from corrosion while heat dissipation is ensured inside the battery pack. Particularly, for the terminal of the battery cell, the explosion-proof valve and other parts which are easy to corrode, protection needs to be made to avoid corrosion.

Disclosure of Invention

The application provides a battery package and communication equipment of good radiating effect and anticorrosive effect to make it have longer life.

The battery pack comprises a battery cell, a box body, a cover body and a sealing element, wherein the cover body covers the box body, the cover body and the box body both comprise accommodating cavities, and the battery cell is accommodated in the sealing cavities of the cover body and the box body; the battery cell comprises a battery cell body, and a terminal and an explosion-proof valve which are positioned at one end of the battery cell body, and the end of the battery cell body, provided with the terminal and the explosion-proof valve, is accommodated in the accommodating cavity of the cover body; the sealing element seals the containing cavity of the cover body so as to seal the terminal and the explosion-proof valve in the containing cavity of the cover body; the battery cell comprises a battery cell body, a battery cover body and a terminal, wherein the battery cell body is provided with a terminal, the terminal is electrically connected with the battery cell body, and the terminal is electrically connected with the terminal.

The terminal and the explosion-proof valve which are easy to corrode are sealed in the containing cavity of the cover body, so that the terminal and the explosion-proof valve are prevented from contacting with external water, gas and the like, corrosive substances possibly contained in the external water, gas and the like are prevented from corroding the terminal and the explosion-proof valve, and the service life of the battery pack is prolonged. And, set up heat radiation structure on the box body, for the electricity core body provides the heat dissipation, further guarantees the life of battery package.

In some embodiments of the present application, the sealing member is a sealing plate, and the sealing plate is detachably connected to the cover body to seal the receiving cavity of the cover body; the sealing element is provided with one or more openings arranged at intervals, one end of the battery cell body of each battery cell, provided with the terminal and the explosion-proof valve, penetrates through one opening to be inserted into the accommodating cavity of the cover body, and each battery cell and the sealing element are detachably connected and seal the opening.

The battery cell is inserted into the accommodating cavity of the cover body through the opening of the sealing element, so that the battery cell and the sealing element are fixed. The sealing element is detachably connected with the cover body and seals the opening end of the cover body, so that the terminal and the explosion-proof valve are sealed in the cover body, and the service life of the battery pack is prolonged. And the sealing element is detachably connected with the cover body, and the battery cell is detachably connected with the sealing element, so that when the battery cell has a problem, the sealing element can be conveniently detached from the cover body, and the battery cell can be maintained or replaced.

Alternatively, in other embodiments of the present application, the number of the openings is greater than the number of the battery cells, and the openings into which the battery cells are not inserted are sealed by a plug detachably connected to the sealing member. When the electric core is inserted into the opening, the blocking piece is taken down. Therefore, the number of the battery cores in the battery pack can be adaptively adjusted according to actual needs, so that the voltage or the current of the battery pack can be increased according to the actual needs.

Specifically, the inner wall of the cover body is annularly provided with a groove, a sealing ring is arranged in the groove, and the periphery of the sealing element is clamped in the groove, so that the sealing element seals the containing cavity of the cover body.

The sealing member is detachably connected with the cover body by clamping the periphery of the sealing member in the groove. And, be equipped with the sealing washer in the recess, avoid external water, gas etc. to get into in the lid for the accepting cavity of lid is sealed, in order to prevent to be located terminal and explosion-proof valve in the lid are corroded.

In an embodiment of the application, the electric core body surface ring is provided with a groove, be equipped with the sealing washer in the groove or the trompil edge of sealing member has set firmly the sealing washer, the trompil edge card of sealing member is held in the recess on electric core body surface and extrusion the sealing washer, so that electric core with the sealing member can be dismantled and be connected and sealed the trompil.

The battery core and the sealing element are fixed by clamping the opening edge of the sealing element in the groove on the surface of the battery core body. And, be equipped with the sealing washer in the recess or the trompil edge of sealing member sets firmly the sealing washer, through the sealing washer prevents that external water, gas from passing through get into between the gap of electricity core body with the sealing member in the lid, realize IP 55's protection standard to guarantee the lid is inside to be sealed structure, guarantees to locate terminal and explosion-proof valve in the lid receive the corruption.

In another embodiment of this application, electricity core body surface ring is equipped with fixed arch, the trompil edge bearing of sealing member fixed arch, just fixed arch with the trompil edge of sealing member can be dismantled fixedly, fixed arch with be equipped with the sealing washer between the sealing member, fixed arch with the sealing member can be dismantled fixedly and extrude the sealing washer, so that electricity core with the sealing member can be dismantled to be connected and sealed the trompil.

Through the fixed arch on electric core body surface with the trompil edge of sealing member is fixed, in order will electric core with the sealing member is fixed, and pass through fixed arch with sealing washer between the sealing member is sealed the trompil avoids external water, gas etc. to pass through the trompil gets into in the lid, guarantees for sealed environment in the lid, avoid being located terminal and explosion-proof valve in the lid corrode.

Furthermore, a plurality of radiating fins are fixed on the sealing plate, and the radiating fins penetrate through the sealing plate from the containing cavity of the cover body and extend to the containing cavity of the box body. And the interior of the box body is divided into a plurality of accommodating areas, and at least one battery cell is arranged in each accommodating area.

The radiating fins extend from the containing cavities of the cover body to the containing cavities of the box body through the sealing plates, so that heat in the cover body can be transmitted from the cover body to the box body through the radiating fins, and the heat in the cover body is radiated.

In another embodiment of the present application, a plurality of partition plates arranged at intervals are arranged in the accommodating cavity of the cover body, so that the accommodating cavity of the cover body is separated into a plurality of slots through the partition plates, and each slot is accommodated in one slot at one end of the battery cell body provided with the terminal and the explosion-proof valve, so that the slot is sealed in the accommodating cavity of the cover body at one end of the battery cell body provided with the terminal and the explosion-proof valve.

Through with the accepting cavity of lid separates into individual slot, with every electric core is inserted and is located one in the slot, thereby be convenient for electric core with the fixed of lid, and be convenient for every electric core is to the sealed of slot.

The sealing element is a sealing ring, a circle of groove is annularly arranged on the surface of the battery cell body, the sealing element is arranged in the groove, a circle of bulge is annularly arranged at the position, close to the notch, of the inner surface of each slot, the bulge is clamped in the groove on the surface of the battery cell body and extrudes the sealing element, so that the battery cell is connected with the cover body, and the second end of the battery cell body is sealed in the accommodating cavity of the cover body.

The battery cell and the cover body are fixed by inserting the bulges on the surface of the battery cell body into the grooves on the slot walls of the slot. And, establish the sealing washer in the slot, avoid external water, gas etc. to pass through the gap between electric core and the lid gets into in the lid, guarantee the internal sealed of lid.

Furthermore, a plurality of radiating fins are fixed on the partition board, the radiating fins extend into the box body from the partition board, the accommodating cavity of the box body is divided into a plurality of accommodating areas, and one or more battery cells are arranged in each accommodating area.

Through set up the fin on the baffle for from the heat in the lid is followed the baffle transmits to in the fin, the rethread fin transmit to in the box body. And the accommodating cavity of the box body is divided into a plurality of accommodating areas, and one or more electric cores are arranged in each accommodating area, so that the electric cores can be more stably arranged in the accommodating cavity of the box body.

In an embodiment of the present application, the heat dissipation structure on the box body is a heat dissipation hole, and each of the heat dissipation fins is provided with one or more openings arranged at intervals, and the openings are communicated with the heat dissipation holes of the box body. Through establish the louvre on the box body to realize the inside and outside air convection of box body, thereby take out the heat in the box body, in order to realize the heat dissipation. And through set up the trompil on the fin, avoid the circulation of air in the box body by the fin blocks for heat can circulate between the accommodation area that the fin separates.

In another embodiment of the present application, the heat dissipation structure is a heat conduction member such as a heat conduction adhesive, one end of the heat conduction member is connected to the cell body, and the other end of the heat conduction member is connected to the surface of the box body, so that the heat of the cell body is transmitted to the surface of the box body through the heat conduction member for heat dissipation.

Further, in some embodiments of the present application, the outer surface of the cover is an uneven surface. Compared with the planar outer surface of the cover body, the contact area between the surface of the cover body and the outside is increased, so that the heat dissipation effect is increased.

Further, in some embodiments of the present application, the second end of the battery cell body in the cover body is connected to the inner surface of the cover body through a heat conducting member such as a heat conducting glue, so that the heat at the second end of the battery cell body is transmitted to the inner surface of the cover body through the heat conducting member, so as to more rapidly dissipate the heat in the cover body.

Further, in some other embodiments of the present application, a plurality of heat dissipation fins are disposed on a surface of the cover at intervals, so as to dissipate heat in the cover more rapidly.

Furthermore, an electric connecting piece is arranged in the cover body, and when the terminals of the battery cores and one end of the explosion-proof valve are inserted into the cover body, the terminals of each battery core are electrically connected with the electric connecting piece so as to realize the electric connection among the battery cores through the electric connecting piece. Through electric connector, can realize fast electric connection between the electric core facilitates the use.

In some embodiments of the present application, the battery pack further includes a Battery Management System (BMS). The battery management system is arranged in the accommodating cavity of the cover body, and the battery cores are electrically connected. The battery management system can prevent the overcharge and overdischarge of the battery cell in the battery pack, monitor the state of the battery cell and prolong the service life of the battery pack.

The communication equipment comprises a remote radio unit and the battery pack, wherein the battery pack is electrically connected with the remote radio unit to supply power to the remote radio unit. The battery pack supplies power to the remote radio unit, so that the remote radio unit can work normally. Because the battery pack has longer service life, the communication equipment has longer service life.

Further, this application communication equipment still includes power module, power module with the battery package electricity is connected, power module converts alternating current into direct current, for the battery package charges into direct current. Because the battery pack needs direct current for charging, and the electricity in the power grid is generally alternating current, the alternating current in the power grid needs to be converted into direct current through the power supply module and then recharged into the battery pack.

This application is through inciting somebody to action electric core is located in the shell, thereby it is right electric core protects. And, set up the louvre on the box body of shell to realize the heat dissipation of electricity core avoids electric core during operation heat too high and to the damage of battery package. Meanwhile, the terminal and the explosion-proof valve which are easy to corrode are sealed in the accommodating cavity of the cover body through the sealing piece, so that corrosive gas or liquid and the like are prevented from entering the accommodating cavity of the cover body to corrode the terminal and the explosion-proof valve of the battery cell, the service life of the battery pack is further prolonged, and the service life of the communication equipment is prolonged.

Drawings

To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a perspective view of a battery pack of an embodiment of the present application;

fig. 2 is a perspective view of the battery pack of fig. 1 in a disassembled configuration;

fig. 3 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

FIG. 4 is a schematic view of an opening direction of a cover according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of the battery pack of the embodiment of FIG. 4 of the present application along the direction I-I;

fig. 6 is a schematic cross-sectional view of a battery pack of another embodiment of the present application along the direction I-I;

FIG. 7 is a schematic view of an opening direction of a cover according to another embodiment of the present application

FIG. 8 is a schematic cross-sectional view of the battery pack of the embodiment of FIG. 7 of the present application along the direction I-I;

FIG. 9 is an enlarged schematic view of the embodiment of FIG. 4 at position II of the battery pack;

fig. 10 is a schematic structural view of a battery pack according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The drawings are for illustrative purposes only and are merely schematic representations, not intended to limit the present patent.

The application provides a battery pack, the battery pack uses as energy storage battery, can be applied to in energy storage basic station, electric motor car or other various electric tools.

Referring to fig. 1 and 2, a battery pack 100 is provided. The battery pack 100 includes a housing 10 and one or more battery cells 20 disposed in the housing 10. Referring to fig. 3, the battery cell 20 includes a battery cell body 21, and a terminal 22 and an explosion-proof valve 23 disposed at one end of the battery cell body 21. Specifically, the battery cell body 21 includes an intermediate section 21a, and a first end 21b and a second end 21c respectively located at two sides of the intermediate section 21 a. The terminal 22 and the explosion-proof valve 23 are provided at the second end 21 c. The casing 10 is used to protect the battery cell 20 disposed therein. Specifically, the casing 10 can prevent mechanical damage such as collision to the battery cell 20, and can also prevent chemical corrosion of the battery cell 20 by corrosive gas or corrosive liquid outside the casing 10. The housing 10 includes a box 11 and a cover 12 covering the box 11. The cover 12 includes an accommodating cavity 121, the case 11 includes an accommodating cavity 111, and the battery cell 20 is accommodated in the cover 12 and the accommodating cavity of the case 11. Specifically, the cover 12 is sleeved on the periphery of the second end 21c from one side of the second end 21c, that is, the second end 21c of the battery cell body 21 is accommodated in the accommodating cavity 121 of the cover 12, and the terminal 22 and the explosion-proof valve 23 which are arranged at the second end 21c are accommodated in the accommodating cavity 121 of the cover 12. The box body 11 is sleeved on the peripheries of the central section 21a and the first end 21b from one side of the first end 21b, that is, the central section 21a and the first end 21b are accommodated in the accommodating cavity 111 of the box body 11. The cover 12 is provided with a sealing element 13, the sealing element 13 is used for sealing the terminal 22 and the explosion-proof valve 23 in the receiving cavity 121 of the cover 12, that is, the sealing element 13 seals the receiving cavity 121 of the cover 12 to form a closed cavity structure, so as to prevent the terminal 22 and the explosion-proof valve 23 from contacting with the outside, and further prevent the terminal 22 and the explosion-proof valve 23, which are easily corroded, from being corroded by external corrosive gas or liquid. Further, because the battery cell 20 is in operation, the battery cell body 21 of the battery cell 20 is very easy to generate a large amount of heat, in order to avoid the influence of high temperature on the service life and the working effect of the battery pack 100, the box body 11 is provided with a heat dissipation structure 112 for providing heat dissipation for the battery cell body 21.

In this embodiment, the heat dissipation structure 112 is a plurality of heat dissipation holes disposed at intervals on the surface of the box 11, and the heat dissipation holes communicate with the accommodating cavity 111 of the box 11 and the outside of the box 11, so that the air in the accommodating cavity 111 of the box 11 can circulate with the air outside the box 11, thereby reducing the temperature inside the box 11 and avoiding the influence of high temperature on the operation of the battery cell 20.

In this application, through the surface of box body 11 sets up the louvre for box body 11 accepts the air in the chamber 111 and can circulate with the outside air of box body 11, with will box body 11 accepts the heat in the chamber 111 and takes out, improves battery package 100's life. Meanwhile, the weak terminal 22 and the weak explosion-proof valve 23 are sealed in the accommodating cavity 121 of the cover 12, so that the terminal 22 and the explosion-proof valve 23 are prevented from contacting with external water, gas and the like, and therefore, the terminal 22 and the explosion-proof valve 23 are prevented from being corroded by corrosive substances possibly contained in the external water, gas and the like, and the service life of the battery pack 100 is prolonged. For example, in a coastal environment, the terminal 22 and the explosion-proof valve 23 of the battery cell 20 are easily corroded due to a high salt content in the air, and the terminal 22 and the explosion-proof valve 23 are prevented from being corroded by the air with a high salt content from the outside by sealing the weak terminal 22 and the explosion-proof valve 23 of the battery cell 20 in the housing cavity 121 of the cover 12.

In other embodiments of the present application, the heat dissipation structure 112 disposed on the box 11 is a heat conducting member such as a heat conducting glue or a heat conducting strip. One end of the heat conducting piece is connected with the battery cell body 21, and the other end of the heat conducting piece is connected with the box wall of the box body, so that heat in the box body 11 is transmitted to the outside of the box body 11.

Further, in other embodiments of the present application, the heat dissipation structure 112 disposed on the box 11 is a heat dissipation fin, through which the heat in the box 11 is transferred to the outside of the box 11. It should be understood that the heat dissipation structure 112 on the box body may also be any one or more of the heat dissipation holes, heat dissipation members, or heat dissipation fins.

Further, in some embodiments of the present application, the battery pack 100 further includes a Battery Management System (BMS). The battery cell 20 is electrically connected to the battery management system, so that the battery management system can prevent the overcharge and overdischarge of the battery, monitor the state of the battery, and prolong the service life of the battery. The battery management system is composed of a PCB, a chip and various electrical elements, wherein the chip and the various electrical elements are electrically connected to the PCB, so that various functions of the battery management system are realized. The battery management system may be provided inside or outside the housing 10. When the battery management system is disposed inside the housing 10, the battery management system is disposed in the accommodating cavity 121 of the cover 12, so that the battery core 20 is electrically connected to the battery management system, and the battery management system is protected.

The battery cell 20 may be a lithium ion battery cell, or may be a nickel-hydrogen battery cell, a nickel-chromium battery cell, a lead-acid battery cell, or other battery cells of various systems. The present application mainly takes a high-temperature blade lithium battery cell applied in an energy storage base station as an example for explanation. The number of the terminals 22 at one end of the cell body 21 is two, and the two terminals 22 are respectively a positive terminal and a negative terminal, through which the cell 20 is connected to a circuit. In this embodiment, the number of the battery cells 20 in the battery pack 100 is ten, and the battery cells are divided into two layers. As can be understood, the number and arrangement of the battery cells 20 in the battery pack 100 are changed according to actual needs.

The shell 10 is made of engineering plastics or metal materials, has certain mechanical strength and heat resistance, and meets the actual protection requirements. Specifically, the metal material may be die-cast aluminum or a die-cast sheet metal part, and the engineering plastic may be various types of engineering plastics such as polyamide, polyphenylene sulfide, polycarbonate, and the like. The box body 11 and the cover body 12 of the casing 10 can be detached and fixed, so that the battery cell 20 can be conveniently taken from and placed in the box body 11, or the battery cell 20 and other structures in the box body 11 can be conveniently maintained when the battery pack 100 is damaged. For example, the cover 12 may be fixed to the case 11 by screws after the cover 12 is placed on the case 11, or the cover 12 may be fixed to the case 11 by a snap fit. Need will lid 12 with when the box body 11 is unpacked apart, take off set screw or open the buckle and can realize the dismantlement of lid 12 and box body 11 easily and fix. It should be understood that the cover 12 and the box 11 may be detachably connected by other detachable fixing methods. In this embodiment, the housing 10 has a rectangular parallelepiped box shape, and is obtained by covering a rectangular parallelepiped case 11 with a rectangular parallelepiped cover 12.

In this embodiment, the heat dissipation holes 112 on the box body 11 are disposed on two opposite surfaces of the box body 11 in a rectangular parallelepiped shape, so that air on two sides of the box body 11 can be sufficiently convected, and heat generated by heating the battery cell body 21 in the box body 11 can be better dissipated. That is, the external air enters the case 11 through the heat dissipation hole 112 on one surface, passes through the housing cavity of the case 11 to take away the electric core body 21 in the housing cavity 111 of the case 11 for heat exchange and take away the hot air in the housing cavity 111, thereby reducing the temperature of the battery pack 100 and ensuring the normal operation of the battery pack 100. The heat dissipation holes 112 on two opposite surfaces of the box body 11 may be in one-to-one correspondence or may be arranged in a staggered manner. The heat dissipation holes 112 on the two opposite surfaces of the box 11 are in one-to-one correspondence, that is, the orthographic projection of the heat dissipation hole 112 on one surface of the box 11 on the other surface opposite to the orthographic projection coincides, so that the external air can rapidly pass through the accommodating cavity 111 of the box 11, and the external air can rapidly circulate in the box 11. And when the heat dissipation holes 112 on the two surfaces of the box body 11 are staggered, the circulation efficiency of the external air in the box body 11 is reduced, but the time for the external air to remain in the accommodating cavity of the box body 11 is longer, so that the external air can exchange heat with the battery cell body 21 in the accommodating cavity of the box body 11 more sufficiently, and a better heat dissipation effect is achieved. In the present application, the heat dissipation holes 112 on the two opposite surfaces of the case 11 are determined to correspond or be staggered according to the specific usage environment of the battery pack 100. For example, when the ambient temperature is high, the heat dissipation holes 112 on the two opposite surfaces of the body 11 may be correspondingly disposed, so as to quickly take out the heat in the box body; when the ambient temperature is lower, the heat dissipation holes 112 on the two opposite surfaces of the body 11 can be staggered, so that the heat exchange is more sufficient, and a better heat dissipation effect is realized.

Referring to fig. 4 to 6, in the present embodiment, the sealing member 13 is a sealing plate for sealing the opening end of the cover 12 to form a closed cavity in the receiving cavity 121. The sealing plate and the cover 12 may be fixedly connected or detachably connected. Specifically, when the sealing plate is fixedly connected to the cover 12, the sealing plate may be fixedly connected by gluing or welding; when the sealing plate is detachably connected to the cover 12, the cover 12 and the sealing plate may be connected by a snap connection, a screw connection, or the like. Referring to fig. 5, in the present embodiment, the cover 12 is detachably connected to the sealing member 13. Specifically, a groove 122 is annularly formed on the inner wall of the cover 12, and the groove 122 is close to the opening of the cover 12. The peripheral edge of the sealing member 13 is retained in the groove 122 to achieve the connection of the sealing member 13 and the cover 12. In this embodiment, the sealing member 13 has a certain elasticity, so that the sealing member 13 can be slightly deformed by simply applying a force to the sealing member 13, so that the peripheral edge of the sealing member 13 is retained in the groove 122, or removed from the groove 122 to separate the sealing member 13 from the cover 12. Further, a sealing ring 123 is disposed in the groove 122. When the peripheral edge of the sealing member 13 is clamped in the groove 122, the peripheral edge of the sealing member 13 presses the sealing ring 123, so that the sealing ring 123 seals the gap at the joint between the sealing member 13 and the cover 12, thereby preventing external water, air and the like from permeating into the accommodating cavity 121 of the cover 12 from the gap at the joint, and maintaining the accommodating cavity 121 of the cover 12 in a sealed environment. In this embodiment, the sealing ring 123 is a rubber ring. It is understood that the sealing ring 123 may also be fixed on the periphery of the sealing member 13, and when the periphery of the sealing member 13 is held in the groove 122, the sealing ring 123 seals the gap at the connection position of the sealing member 13 and the cover 12.

Further, the sealing member 13 is provided with one or more spaced apart openings 124. In this embodiment, the number of the openings 124 is the same as that of the battery cells 20 disposed in the housing 10, one end of each battery cell 20, which is provided with the terminal 22 and the explosion-proof valve 23, is inserted into the receiving cavity 121 through the opening 124, and each battery cell 20 is detachably connected to the sealing member 13 and seals the opening 124. It is understood that, in other embodiments, the number of the openings 124 is greater than that of the battery cells, and the openings 124 into which the battery cells 20 are not inserted are inserted into the openings 124 through a plug detachably connected to the sealing member 13 to seal the openings 124. The blocking member needs to be removed when the opening 124 is inserted into the battery cell 20. In this embodiment, the size of the opening 124 is slightly smaller than the radial cross-sectional size of the battery cell 20. A circle of groove 211 is annularly arranged on the surface of the cell body 21 of the cell 20, a sealing ring 212 is arranged in the groove 211, and the edge of the opening 124 of the sealing element 13 is clamped in the groove 122 on the surface of the cell body 21, so that one end of the cell 20 is inserted into the accommodating cavity 121 and connected with the sealing element 13. The periphery of the opening 124 of the sealing member 13 presses the sealing ring 212, so that the sealing ring 212 seals a gap at a connection position between the sealing member 13 and the cell body 21, and thus water, gas and the like outside the surface enter the accommodating cavity of the cover 12 through the gap between the sealing member 13 and the cell body 21, thereby ensuring that the accommodating cavity of the cover 12 is in a closed state, and protecting the terminal 22 and the explosion-proof valve 23 in the accommodating cavity of the cover 12. It can be understood that, when the sealing ring 212 is fixed to the edge of the opening 124 of the sealing member 13, and when the opening edge of the sealing member 13 is held in the groove 122, the edge of the opening 124 of the sealing member 13 and the wall of the groove press the sealing ring 212, so that the sealing ring seals the gap at the connection between the sealing member 13 and the cell body 21, and the receiving cavity 121 of the cover 12 is kept in a sealed state. In this embodiment, the accommodating cavity 121 of the cover 12 can reach the protection level of IP 55.

Further, the sealing element 13 and the cover 12 may be fastened together by screws or fasteners disposed on the cover 12 and/or the sealing element 13 to further fix the cover 12 and the battery cell 20, so that the battery cell 20 is more stable in the housing 10.

Referring to fig. 6, in another embodiment of the present application, a circle of fixing protrusions 213 is annularly disposed on a surface of the cell body 21 of the cell 20, and a size of the opening 124 of the sealing member 13 is equal to or slightly larger than a size of a radial cross section of the cell body 21, so that the cell body 21 can smoothly pass through the sealing member 13 and be inserted into the receiving cavity 121 of the cover 12. The edge of the opening 124 of the sealing member 13 holds the fixing protrusion 213, and the fixing protrusion 213 is detachably fixed to the edge of the opening 124 of the sealing member 13. Specifically, the fixing protrusion 213 and the sealing member 13 are detachably fixed by a screw or a snap. In this embodiment, the fixing protrusion 213 and the sealing member 13 are fixed together by a screw. Further, a sealing ring 214 is arranged between the fixing protrusion 213 and the sealing member 13, and the sealing ring 214 is compressed when the fixing protrusion 213 and the sealing member 13 are fixed, so that a gap between the connecting position of the fixing protrusion 213 and the sealing member 13 is sealed by the sealing ring 214, thereby preventing external water, air and the like from entering the accommodating cavity of the box body 11 through the gap between the sealing member 13 and the fixing protrusion 213, and ensuring the sealing property of the accommodating cavity 121 of the cover body 12.

In this embodiment, the sealing member 13 is detachably connected to the cover 12, so that the sealing member 13 can be easily detached from the cover 12 while the sealing property of the receiving cavity 121 of the cover 12 is ensured, thereby facilitating the inspection or maintenance of the components or structures (such as various components in a battery management system) in the receiving cavity 121. In addition, through the detachable connection between the battery cell 20 and the sealing member 13, the battery cell 20 can be easily detached while the sealing performance of the accommodating cavity 121 of the cover 12 is ensured, and when one of the battery cells 20 is damaged, the replacement can be conveniently performed. It should be understood that the sealing member 13 may be connected and sealed with the cover 12 by welding or adhesive fixing when there is no need to consider convenient replacement of the battery cell 20 or repair of components or structures in the receiving cavity 121. The battery cell 20 may also be connected and sealed with the battery cell 20 by welding or adhesive fixation.

Further, referring to fig. 4, a plurality of heat dissipation fins 14 are fixed on the sealing plate, and the heat dissipation fins 14 are made of a material having a good heat conduction effect. For example, the heat sink 14 may be a metal aluminum strip. The heat sink 14 extends from the accommodating cavity of the cover 12 to the accommodating cavity of the box 11 through the sealing plate, so as to conduct heat in the accommodating cavity of the cover 12 to the accommodating cavity of the box 11, and then the heat in the accommodating cavity of the cover 12 is discharged through heat exchange with the outside air in the accommodating cavity of the box 11. Further, the heat sink 14 divides the accommodating cavity 111 of the box body 11 into a plurality of accommodating areas, and at least one battery cell body 21 is disposed in each accommodating area. Thereby confining the cell body 21 within a fixed area, and ensuring stability of the cell body 21 within the casing 10.

The heat dissipation plate 14 may be a heat dissipation strip, and a plurality of the heat dissipation strips may be located in the same plane to divide the receiving cavity 111 into a plurality of receiving areas. The heat dissipation strips in the same plane are arranged at intervals, so that air can circulate through the gap between two adjacent heat dissipation strips, and the influence of the heat dissipation fins 14 on the air circulation in the box body 11 is avoided. Further, in some embodiments of the present invention, the planes of the plurality of heat dissipation bars are parallel and located on the air flow path of the receiving cavity 111 of the box 11. The adjacent two planar heat dissipation strips can be arranged in a staggered manner, so that the length of a flow path of air in the accommodating cavity 111 of the box body 11 is increased, the heat exchange efficiency of the outside air in the accommodating cavity 111 of the box body 11 is increased, and the heat exchange effect is further improved.

In other embodiments of the present application, the heat dissipation plate 14 may also be a heat dissipation plate, and a plurality of the heat dissipation plates are disposed in parallel or in a cross manner to divide the accommodating cavity of the box 11 into a plurality of accommodating areas. Each of the heat dissipation plates is provided with a plurality of through holes 141 arranged at intervals, so that external air can circulate among different accommodating areas through the through holes 141, and the heat dissipation plates are prevented from influencing air circulation in the accommodating cavities of the box body 11. Similarly, when a plurality of heat dissipation plates are arranged on the air flow path in the accommodating cavity of the box body 11, the through holes 141 of two adjacent heat dissipation plates can be arranged in a staggered manner, so that the flow path of air in the accommodating cavity of the box body 11 is increased, and the heat exchange effect is improved.

Referring to fig. 7 and 8, a battery pack 100 according to another embodiment of the present application has a structure substantially the same as the structure of the battery pack 100 shown in fig. 4, except that: the accommodating cavity 121 of the cover 12 is divided into a plurality of slots 125 by a partition 15, and one end of each cell body 21, which is provided with a terminal 22 and an explosion-proof valve 23, is inserted into one of the slots 125 and seals the slot 125, so that one end of the cell 20, which is provided with the terminal 22 and the explosion-proof valve 23, is sealed in the accommodating cavity 121 of the cover 12. Specifically, in an embodiment of the present application, a circle of groove 215 is annularly disposed on a surface of the electric core body 21, and the sealing ring is disposed in the groove 215. In this embodiment, the sealing ring is the sealing member 13. A circle of protrusions 216 are annularly arranged at positions of the slots 125 close to the notches, and the protrusions 216 are clamped in the grooves 215 on the surface of the battery cell body 21 and press the sealing member 13, so that the battery cell 20 is connected with the cover 12, and one end of the battery cell body 21, which is provided with the terminal 22 and the explosion-proof valve, is sealed in the accommodating cavity 121 of the cover 12. It can be understood that, a circle of protrusion may be arranged around one end of the battery cell body 21 close to the terminal 22, a circle of groove is annularly arranged on a groove wall of each slot 125, a sealing ring is arranged in the groove, and the protrusion on the surface of the battery cell body 21 is clamped in the groove on the groove wall, so that the battery cell body 21 is fixed with the cover 12, and the sealing of the accommodating cavity 121 of the cover 12 is realized.

Further, the cover 12 and the battery cell 20 may be further fixed by screws, or the cover 12 and/or the battery cell 20 are provided with fasteners and fastened to each other, so as to further fix the cover 12 and the battery cell 20, and thus the battery cell 20 is more stable in the housing 10.

Further, at least one opening 126 is formed in the separator, so that two adjacent battery cells 20 can be connected in series. For example, two adjacent battery cells 20 are electrically connected by an electrical connector such as a wire, and the wire can pass through the opening 126 of the partition board to electrically connect the battery cells 20 in the two adjacent slots 125.

In this embodiment, the partition plate 15 is made of a heat conductive material with good heat conductivity, a plurality of heat dissipation fins 16 are fixed on the partition plate 15, the heat dissipation fins 16 extend from the partition plate 15 into the accommodating cavity 111 of the box body 11, and divide the accommodating cavity 111 of the box body 11 into a plurality of accommodating areas, and at least one battery cell 20 is disposed in each accommodating area. So that the heat in the cover 12 is transferred to the heat sink 14 through the partition 16, and then exchanges heat with the outside air in the receiving cavity 111 of the box 11, thereby dissipating the heat. The structure of the heat sink 16 may be the same as that of the heat sink 14 in the embodiment of fig. 4, and details are not repeated herein.

Further, referring to fig. 9, in some embodiments of the present application, the outer surface 11a of the cover 11 is an uneven surface, so as to increase a contact area between the outer surface of the cover 11 and the outside, thereby increasing heat dissipation of the cover 11. For example, the outer surface of the cover may be a serrated surface or a wavy surface, etc. In this embodiment, the outer surface of the cover 11 is serrated. Further, in some embodiments of the present application, the outer surface of the cover 12 may further be provided with heat dissipation fins arranged at intervals, so as to enhance the heat dissipation effect of the cover 12. Further, in some other embodiments of the present application, the second end of the battery cell body in the cover 12 is connected to the inner surface of the cover 12 by a heat conducting member such as a heat conducting glue, so that the heat at the second end of the battery cell body is more quickly transmitted to the inner surface of the cover 12 by the heat conducting member, so as to more quickly dissipate the heat in the cover 11.

Further, in some embodiments of the present application, an electrical connector is disposed in the cover 12, so as to facilitate a plurality of the battery cells 20 to be connected in series or in parallel or to be connected to a circuit. The electric connecting piece can be a cable, a copper bar, an aluminum bar and the like. Specifically, the terminal of each battery cell is electrically connected with the electrical connector, so that the electrical connection among the battery cells is realized through the electrical connector. Alternatively, the electrical connector is further connected to a circuit, so as to connect the plurality of battery cells 20 to the circuit. The electrical connector may also be a socket. The socket comprises a plurality of groups of jacks, wherein the jacks are internally provided with elastic pieces, and the elastic pieces in the jacks are electrically connected through a certain series or parallel circuit. The terminals 22 of each of the battery cells 20 are inserted into a set of the insertion holes. The terminals 22 of the battery cells 20 are inserted into the insertion holes to contact with the spring pieces in the insertion holes, so that a plurality of battery cells 20 inserted into the socket are connected in series or in parallel. Or, the elastic sheet in each group of the jack is connected to a circuit, and when the terminal of the battery core 20 is inserted into the jack, the terminal is connected to the circuit, so that the battery is convenient to use.

Further, referring to fig. 10 again, in some embodiments of the present application, a connection end 30 is further disposed on an outer surface of the cover 12, and one end of the connection end 30 is inserted into the cover 12 and electrically connected to the terminal 22 of each of the battery cells 20. The connection end 30 and the cover 12 are connected by injection molding or by colloid connection, and the sealing environment in the cover 12 is maintained. The connecting terminal 30 may be made of a material with a good corrosion resistance, such as a quick-insertion terminal made of copper alloy, so as to prevent corrosion of the connecting terminal 20. The number of the connecting ends 30 and is varied according to actual needs. In this embodiment, two connection terminals 30 are provided, which are respectively used as the positive terminal and the negative terminal of the battery pack 100. The battery pack 100 can be connected to a circuit through the connection terminal 30, and the battery pack 100 can be used.

The battery cell 20 is arranged in the casing 10, so that the battery cell 20 is protected. Moreover, the heat dissipation hole 112 is formed in the box body 11 of the casing 10, so that heat dissipation of the battery cell 20 is realized, and damage to the battery pack 100 caused by overhigh heat during operation of the battery cell 20 is avoided. Meanwhile, the terminal 22 and the explosion-proof valve 23, which are easily corroded, are sealed in the housing cavity 121 of the cover 12 by the sealing member 13, so that corrosive gas, liquid and the like are prevented from entering the housing cavity 121 of the cover 12 to corrode the terminal 22 and the explosion-proof valve 23, which are easily corroded by the battery cell 20, and the service life of the battery pack 100 is further prolonged.

Referring to fig. 11, the present application further provides a communication device 1000, where the communication device 1000 includes a Radio Remote Unit (RRU) 200 and the battery pack 100. The battery pack 100 is electrically connected to the remote radio unit 200 to supply power to the remote radio unit 200. The remote radio unit 200 is configured to convert a baseband signal into a radio signal, amplify the radio signal, and transmit the radio signal. The battery pack 100 supplies power to the remote radio unit 200, so that the remote radio unit 200 can work normally. The battery pack 100 of the present application has a long service life, so that the communication device 1000 has a long service life.

Further, the communication device 1000 of the present application further includes a power module 300, and the power module 300 is electrically connected to the battery pack 100. The power module 300 converts the ac power into the dc power to charge the battery pack 100 with the dc power. Since the battery pack 100 needs direct current for charging, and the electricity in the power grid is generally alternating current, the alternating current in the power grid needs to be converted into direct current by the power module 300 and then recharged into the battery pack 100. It should be noted that, in some embodiments of the present application, the Battery Management System (BMS) is included in the battery pack 100, and the battery management system prevents overcharge and overdischarge of the battery pack 100 and monitors the state of the battery pack to prolong the life of the battery pack. At this time, the power module 300 can be directly electrically connected to the battery pack 100. In some other embodiments of the present application, the battery management system is not included in the battery pack 100. At this time, the battery pack 100 needs to be electrically connected to the battery management system and the power module 300, so as to ensure that the battery pack 100 is charged and discharged normally and prolong the service life of the battery pack 100.

The foregoing is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A battery pack is characterized by comprising a battery cell, a box body, a cover body and a sealing piece, wherein the cover body covers the box body, the cover body and the box body both comprise accommodating cavities, and the battery cell is accommodated in the accommodating cavities of the cover body and the box body; the battery cell comprises a battery cell body, and a terminal and an explosion-proof valve which are positioned at one end of the battery cell body, and the end of the battery cell body, provided with the terminal and the explosion-proof valve, is accommodated in the accommodating cavity of the cover body; the cover body comprises an opening, and the sealing element seals the opening so as to seal the containing cavity of the cover body and seal the terminal and the explosion-proof valve in the containing cavity of the cover body; the battery cell comprises a battery cell body and a cover body, wherein the battery cell body is provided with a terminal, the cover body is provided with a terminal, and the terminal is electrically connected with the terminal.

2. The battery pack of claim 1, wherein the sealing member is a sealing plate that is removably coupled to the cover to seal the receiving cavity of the cover; the sealing element is provided with one or more openings arranged at intervals, one end of each battery cell body, which is provided with the terminal and the explosion-proof valve, penetrates through one opening to be inserted into the containing cavity of the cover body, and each battery cell is detachably connected with the sealing element and seals the opening.

3. The battery pack according to claim 2, wherein the inner wall of the cover has a groove formed therein, and a sealing ring is disposed in the groove, and the peripheral edge of the sealing member is retained in the groove, so that the sealing member seals the receiving cavity of the cover.

4. The battery pack according to claim 2 or 3, wherein a groove is formed around the surface of the battery cell body, a sealing ring is arranged in the groove or a sealing ring is fixedly arranged on the opening edge of the sealing member, and the opening edge of the sealing member is clamped in the groove on the surface of the battery cell body and presses the sealing ring, so that the battery cell and the sealing member are detachably connected and seal the opening.

5. The battery pack according to claim 2 or 3, wherein a fixing protrusion is annularly disposed on a surface of the battery cell body, an opening edge of the sealing member supports the fixing protrusion, the fixing protrusion is detachably fixed to the opening edge of the sealing member, a sealing ring is disposed between the fixing protrusion and the sealing member, and the fixing protrusion and the sealing member are detachably fixed to press the sealing ring, so that the battery cell is detachably connected to the sealing member and seals the opening.

6. The battery pack according to claim 2, wherein the sealing plate has a plurality of heat radiating fins fixed thereto, the heat radiating fins extending from the receiving cavity of the lid body to the receiving cavity of the case body through the sealing plate.

7. The battery pack of claim 1, wherein a plurality of partition plates are disposed at intervals in the receiving cavity of the cover body, so as to divide the receiving cavity of the cover body into a plurality of slots through the partition plates, and one end of each cell body, which is provided with a terminal and an explosion-proof valve, is received in one of the slots and seals the slot, so that one end of each cell body, which is provided with the terminal and the explosion-proof valve, is sealed in the receiving cavity of the cover body.

8. The battery pack according to claim 7, wherein the sealing element is a sealing ring, a groove is formed around the surface of the battery cell body, the sealing element is disposed in the groove, a protrusion is formed around a position of the inner surface of each slot, which is close to the slot opening, the protrusion is clamped in the groove on the surface of the battery cell body and presses the sealing element, so that the end of the battery cell body, which is provided with the terminal and the explosion-proof valve, is sealed in the accommodating cavity of the cover body.

9. The battery pack of claim 7, wherein a plurality of fins are secured to the separator plate, the fins extending from the separator plate into the case.

10. The battery pack according to claim 6 or 9, wherein each of the heat dissipation fins has one or more openings spaced apart from each other, and the openings communicate with the heat dissipation holes of the case.

11. The battery pack according to claim 1, wherein the outer surface of the cover body is an uneven surface.

12. The battery pack of claim 1, wherein an electrical connector is disposed in the cover, and when the terminals of the plurality of cells and one end of the explosion-proof valve are inserted into the cover, the terminal of each cell is electrically connected to the electrical connector, so that the electrical connection between the plurality of cells is realized through the electrical connector.

13. A communication device comprising a remote radio unit and the battery pack of any of claims 1-12, the battery pack being electrically connected to the remote radio unit to power the remote radio unit.

14. The communication device of claim 13, comprising a power module electrically coupled to the battery pack, the power module converting alternating current to direct current to charge the battery pack with direct current.