CN216085107U - Dampproof device and power battery system - Google Patents

Abstract

The utility model belongs to the technical field of battery moisture protection, and particularly relates to a moisture protection device and a power battery system. Wherein, dampproofing device is provided with the holding chamber including dampproofing case and protective sheath, dampproofing case, and the bleeder vent in intercommunication holding chamber is seted up to the lateral wall, and the first open end and the dampproofing case sealing connection and the penetrating gas pocket of parallel connection of protective sheath, the second open end of protective sheath supply power battery's electric connector to peg graft to make the electric connector cover establish to the protective sheath in, the holding intracavity is provided with the drier. The electric connection joint of the power battery can be sleeved in the protective sleeve, and the protective sleeve protects the electric connection joint from contacting with external moist air; in addition, the drying agent in the accommodating cavity can absorb moisture in the air in the accommodating cavity and the protective sleeve and can also absorb moisture on the surface of the electric connection joint which is just inserted, so that the air in the accommodating cavity and the protective sleeve and the electric connection joint are always kept dry, and the electric connection joint of the power battery is effectively prevented from being wetted and rusted.

Description

Dampproof device and power battery system

Technical Field

The utility model belongs to the technical field of battery moisture protection, and particularly relates to a moisture protection device and a power battery system.

Background

The power battery is a battery for providing a power source for electric tools and products, and generally refers to a rechargeable battery for providing power for electric vehicles, electric trains, electric bicycles, and the like. In the field of electric automobiles, a power battery is mainly different from a starting battery for starting an automobile engine, and the power battery mostly adopts a valve port sealed storage battery.

The power battery generally includes a housing and a battery main body disposed inside the housing, and an electrical connection terminal of the battery main body extends out of the housing for connection with an electrical connector of an external electrical structure and a charging connector of an external charging structure. Therefore, the shell can play a certain protection role for the internal battery body, the battery body can be effectively prevented from being affected with damp or being impacted, however, the electric connection joint of the battery body is exposed outside the shell, the power battery is in the condition of transportation, storage and the like without use, the electric connection structure is exposed in the air, the joint is easily affected with damp and rusted, the normal conductive performance of the joint is affected, the charging and discharging capacity of the battery body is affected, and the normal use of the power battery is affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide a moisture-proof device and a power battery system, and aims to solve the technical problems that in the prior art, an electric connection joint of a power battery is exposed outside a shell, and the electric connection joint is easily affected by moisture and rust to influence the normal use of the power battery.

In order to achieve the purpose, the utility model adopts the technical scheme that: a moisture barrier comprising:

the moisture-proof box is provided with an accommodating cavity, the side wall of the moisture-proof box is provided with an air hole, and the air hole is communicated with the accommodating cavity;

the protection sleeve is provided with a first opening end and a second opening end which are oppositely arranged, the first opening end is hermetically connected with the moisture-proof box and communicated with the air holes, and the second opening end is used for inserting the electric connection joint of the power battery so that the electric connection joint is sleeved in the protection sleeve;

the drying agent is contained in the containing cavity and used for absorbing moisture in the air in the containing cavity and the protective sleeve.

By adopting the technical scheme, when the power battery is not used, such as transportation or storage, the electric connection joint of the power battery is inserted from the second opening end of the protective sleeve, and the electric connection joint is sleeved in the protective sleeve and cannot be contacted with external moist air; and, set up dampproofing case to place the drier at the holding intracavity of dampproofing case, the holding chamber passes through the bleeder vent intercommunication with the protective sheath, and like this, the moisture in the air in holding chamber and the protective sheath can be absorbed to the drier, still absorbs the moisture on just inserted electric connection surface simultaneously, makes air and electric connection in holding chamber, the protective sheath keep dry all the time, avoids electric connection to wet rust, ensures that electric connection is normal stable electrically conductive.

In some embodiments, two air holes are formed in the side wall of the moisture-proof box at intervals, the moisture-proof box is connected with two protective sleeves in a sealing mode, two first open ends are respectively communicated with the two air holes, and two second open ends are respectively used for inserting and connecting a positive electrode connector and a negative electrode connector of the power battery.

Through adopting foretell technical scheme, because power battery generally has two electric connection of positive terminal and negative terminal, so, set up two independent bleeder vents and holding chamber intercommunication on dampproofing case, set up two independent protective sheaths and dampproofing case and be connected and communicate through two bleeder vents and holding chamber respectively, two protective sheaths are used for cup jointing two electric connection of protection respectively, ensure that power battery's two joints all can not wet and rust.

In some embodiments, the side wall of the moisture-proof box is provided with an air vent, the protective sleeve is a three-way joint sleeve, the three-way joint sleeve is provided with a first opening end and two second opening ends, and the two second opening ends are respectively used for inserting and connecting a positive electrode joint and a negative electrode joint of the power battery.

Through adopting foretell technical scheme, the three way connection cover that adopts to have three interface is as the protective sheath, set up a bleeder vent on dampproofing case can, the first open end of three way connection cover links to each other with dampproofing case and feeds through with the holding chamber through this bleeder vent, two second open ends of three way connection cover are used for cup jointing two electric connection joint of protection power battery respectively, like this, only need set up a bleeder vent on dampproofing case can, dampproofing case structure is simpler, production technology can simplify, the connection between protective sheath and the dampproofing case is also simple relatively.

In some embodiments, the protective sheath is an elastic sheath.

Through adopting foretell technical scheme, the elastic sleeve has certain elastic deformation ability, can avoid when cup jointing electric connection joint, electric connection joint and protective sheath take place the friction and interfere, avoid electric connection joint wearing and tearing to appear.

In some embodiments, the moisture barrier further comprises a sealing head removably connected to the protective sleeve and sealing the second open end when the sealing head is connected to the protective sleeve.

Through adopting foretell technical scheme, when damp proof device does not use, be connected sealing joint and protective sheath, the second open end of sealing joint sealing protective sheath avoids outside air to get into protective sheath and holding chamber from the second open end, prolongs the life of holding intracavity drier, ensures damp-proof effect of damp proof device.

One or more technical schemes in the moisture-proof device provided by the utility model have at least one of the following technical effects: the protective sleeve of the moisture-proof device can be suitable for being matched and connected to the electric connection joint of the power battery, when the power battery is not used, the electric connection joint is sleeved in the protective sleeve, and the protective sleeve protects the electric connection joint from being contacted with external moist air; and, the holding chamber and the protective sheath of dampproofing case pass through the bleeder vent intercommunication, and the moisture in the air in holding chamber and the protective sheath can be absorbed to the drier of placing in the holding chamber, can also absorb the surperficial moisture of electric connection joint that just inserts simultaneously, makes air and electric connection joint in holding chamber, the protective sheath remain dry throughout, avoids electric connection joint to wet rust, ensures that electric connection joint is normally stable electrically conductive.

The other technical scheme of the utility model is as follows: the utility model provides a power battery system, includes power battery and foretell dampproof device, and power battery includes shell and battery main body, is provided with the installation cavity in the shell, and battery main body installs in the installation cavity, and battery main body's electric connection joint extends to outside the shell, and electric connection joint can follow the second open end and insert and the cover is established to the cover in.

By adopting the technical scheme, the moisture-proof device is arranged for performing moisture-proof protection on the electric connection joint of the power battery, when the power battery is in idle conditions such as transportation or storage, the electric connection joint of the power battery is in an exposed state, at the moment, the electric connection joint is sleeved in the protective sleeve, and the protective sleeve protects the electric connection joint from contacting with external humid air; and, the setting of dampproofing case holding intracavity drier can make air and the electric connection in the protective sheath keep dry all the time, avoids electric connection to wet the rust, ensures that electric connection is normal stable electrically conductive to ensure power battery's normal charge-discharge performance.

In some embodiments, the housing includes a first half and a second half detachably connected in a protruding direction of the electrical connection terminal, and the first half and the second half enclose a mounting cavity.

Through adopting foretell technical scheme, first half can be dismantled with the second half and be connected and form the shell, and battery body installs in the installation intracavity that is enclosed to establish the formation by first half and second half, when needing to get to put or overhaul battery body, it can to detach first half and second half, the operation such as installation and maintenance of the interior battery body of shell of being convenient for.

In some embodiments, a clamping groove is formed in an end portion of the first half portion, which is away from the electrical connection joint, a clamping block which is in plug-in fit with the clamping groove is arranged in an end portion of the second half portion, which faces the electrical connection joint, at least one positioning groove is formed in each of two opposite groove walls of the clamping groove, and an elastic positioning block is arranged at a position, corresponding to the positioning groove, of the clamping block;

when the clamping blocks are inserted into the clamping grooves, the two elastic positioning blocks are correspondingly clamped into the two positioning grooves one by one.

Through adopting foretell technical scheme, first half and second carry out the joint through fixture block and draw-in groove cooperation, set up constant head tank and the cooperation of elastic positioning fixture block joint simultaneously for first half that prevents the joint connection breaks away from the second half, and the connection structure of shell is simple, easy dismounting, and has better connection stability.

In some embodiments, a plurality of clamping grooves are uniformly arranged at intervals on the end part of the first half part, which is far away from the electric connection joint, and clamping blocks are arranged at positions of the second half part, which correspond to the clamping grooves;

or the clamping groove is an annular clamping groove arranged at the end part of the first half part, the clamping block is an annular clamping block arranged at the second half part, a plurality of positioning grooves are respectively arranged on two opposite groove walls of the annular clamping groove at intervals, and elastic positioning blocks are respectively arranged at positions of the annular clamping block corresponding to the positioning grooves.

Through adopting foretell technical scheme, set up a plurality of draw-in grooves and a plurality of fixture block cooperation joint, perhaps set up the draw-in groove of annular form and trade the fixture block cooperation joint of shape, set up a plurality of constant head tanks and a plurality of elastically positioned piece joint cooperation simultaneously, improve the stability and the fastness of shell connection assembly.

In some embodiments, the battery body is covered with an anti-corrosion structure layer, the anti-corrosion structure layer is covered with a flame-retardant structure layer, and the electrical connection joint sequentially penetrates through the anti-corrosion structure layer and the flame-retardant structure layer and then extends out of the shell.

According to the power battery system provided by the utility model, the anticorrosion structure layer is arranged outside the battery main body to cover the outer surface of the battery main body, and the anticorrosion structure layer can protect the surface of the battery main body from being corroded, so that the effect of protecting the battery main body is achieved; in addition, the flame-retardant structure layer is arranged outside the anti-corrosion structure layer, and the flame-retardant structure layer can protect the battery main body in a high-heat state, so that spontaneous combustion of the battery main body is avoided, and the use safety of the power battery is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a cross-sectional view of a moisture barrier in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional structural view of another moisture barrier in accordance with one embodiment of the present invention;

FIG. 3 is a cross-sectional view of the moisture barrier as shown in FIG. 1 with the protective sleeve attached to the sealing head;

FIG. 4 is a schematic cross-sectional structural view of a power battery system according to a second embodiment of the present invention;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

FIG. 6 is a schematic diagram of a partial configuration of a power cell of the power cell system shown in FIG. 4.

Wherein, in the figures, the respective reference numerals:

10. a moisture barrier; 11. a moisture-proof box; 111. an accommodating cavity; 112. air holes are formed; 12. a protective sleeve; 121. a first open end; 122. a second open end; 13. a desiccant; 14. a sealing head; 200. a power battery; 20. a housing; 21. a mounting cavity; 22. an electrical connection terminal; 23. a first half portion; 231. a card slot; 2311. positioning a groove; 24. a second half; 241. a clamping block; 2411. an elastic positioning block; 2412. a spring; 25. a handle; 30. a battery main body; 40. an anti-corrosion structural layer; 50. and (4) a flame-retardant structural layer.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to fig. 1 to 6 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The first embodiment is as follows:

as shown in fig. 1 to 3, a first embodiment of the present invention provides a moisture protection device 10 for protecting an electrical connector 22 of a power battery against moisture and preventing the electrical connector 22 of the power battery from rusting due to moisture.

The moisture barrier 10 of the present embodiment includes a moisture barrier case 11, a protective cover 12, and a desiccant 13. Wherein, the interior of the moisture-proof box 11 is provided with an accommodating cavity 111, the side wall of the moisture-proof box 11 is provided with a vent hole 112, and the vent hole 112 is communicated with the accommodating cavity 111; the protective cover 12 has a first opening end 121 and a second opening end 122 opposite to each other, and the first opening end 121 is connected with the moisture-proof box 11 in a sealing manner and is communicated with the air hole 112. Specifically, when the first opening end 121 of the protective cover 12 is connected with the moisture-proof box 11, the air hole 112 is located in the first opening end 121, the air in the accommodating cavity 111 directly enters the protective cover 12 from the first opening end 121 through the air hole 112, and meanwhile, the first opening end 121 is hermetically connected with the moisture-proof box 11, so that it is ensured that the outside air cannot enter the protective cover 12 or the accommodating cavity 111 through the first opening end 121. The second opening end 122 of the protection cover 12 is used for inserting the electrical connector 22 of the power battery 200, so that the electrical connector 22 is sleeved in the protection cover 12, and the drying agent 13 is contained in the containing cavity 111 and is used for absorbing moisture in the air in the containing cavity 111 and the protection cover 12.

In this way, when the power battery is not used, such as for transportation or storage, the power battery electrical connection terminal 22 is inserted from the second open end 122 of the protection sleeve 12, and the electrical connection terminal 22 is sleeved in the protection sleeve 12 and is not in contact with the external humid air; and, set up dampproofing case 11, and place drier 13 in the holding chamber 111 of dampproofing case 11, holding chamber 111 passes through bleeder vent 112 with protective sheath 12 and communicates, like this, drier 13 can absorb the moisture in the air in holding chamber 111 and protective sheath 12, still absorb the moisture on the electric connection joint 22 surface that just inserts simultaneously, make the air in holding chamber 111, protective sheath 12 and electric connection joint 22 keep dry all the time, avoid electric connection joint 22 to wet rust, ensure that electric connection joint 22 is normally stable electrically conductive.

According to the moisture-proof device 10 provided by the embodiment of the utility model, the protective sleeve 12 can be suitable for being matched and connected to the electric connection joint 22 of the power battery, when the power battery is not used, the electric connection joint 22 is sleeved in the protective sleeve 12, and the protective sleeve 12 protects the electric connection joint 22 from being contacted with external moist air; moreover, the accommodating cavity 111 of the moisture-proof box 11 is communicated with the protective sleeve 12 through the air holes 112, the desiccant 13 placed in the accommodating cavity 111 can absorb moisture in the air in the accommodating cavity 111 and the protective sleeve 12, and can also absorb moisture on the surface of the electric connection joint 22 which is just inserted, so that the air in the accommodating cavity 111 and the protective sleeve 12 and the electric connection joint 22 are always kept dry, the electric connection joint 22 is prevented from being wetted and rusted, and the normal stable conduction of the electric connection joint 22 is ensured.

In the embodiment, as shown in fig. 1 and fig. 2, the drying agent 13 is a solid drying agent 13, such as silica gel or calcium chloride, and in practical use, the drying agent 13 may be made into a block structure with a volume larger than the opening size of the air hole 112, and filled or fixed in the accommodating cavity 111 to prevent the drying agent 13 from escaping through the air hole 112.

In this embodiment, as shown in fig. 1 and 2, the inner diameter of the protective casing 12 may be slightly larger than the size of the electrical connector 22, so as to prevent the electrical connector 22 from frictionally interfering with the protective casing 12 when the protective casing 12 is sleeved on the electrical connector 22. In addition, the length of the protective sleeve 12 may be set to be slightly longer than the length of the electrical contact portion of the electrical connection terminal 22, so as to ensure that the electrical contact portion can be completely sleeved into the protective sleeve 12, thereby avoiding being affected with damp.

In this embodiment, the protective cover 12 may be integrally formed with the moisture-proof box 11, so as to ensure that the first opening end 121 of the protective cover 12 is hermetically connected with the moisture-proof box 11. The protective cover 12 may be welded or bonded to the moisture-proof box 11, so that the connection tightness can be ensured while the moisture-proof box 11 of the protective cover 12 is firmly connected. Therefore, the specific connection mode of the protective cover 12 and the moisture-proof box 11 is not limited uniquely here, and the design can be selected according to the actual situation.

In this embodiment, as shown in fig. 1, two air holes 112 are spaced apart from each other on a side wall of the moisture-proof box 11, the moisture-proof box 11 is connected with two protection sleeves 12 in a sealing manner, first open ends 121 of the two protection sleeves 12 are respectively communicated with the two air holes 112, and second open ends 122 of the two protection sleeves 12 are respectively used for inserting a positive terminal and a negative terminal of the power battery 200. So, because power battery generally has two electric connection joint 22 of positive pole joint and negative pole joint, set up two independent bleeder vent 112 and holding chamber 111 intercommunication on dampproofing case 11, set up two independent protective sheaths 12 and be connected with dampproofing case 11 and communicate with holding chamber 111 through two bleeder vent 112 respectively, two protective sheaths 12 are used for cup jointing two electric connection joint 22 of protection respectively, ensure that power battery's two joints all can not wet rust.

Or, as shown in fig. 2, as an alternative to the above solution, in some other embodiments, only one vent 112 may be formed on the side wall of the moisture-proof box 11, and the protective sleeve 12 may be a three-way joint sleeve, that is, a joint with three joints, where one opening of the three-way joint sleeve is used as a first open end 121 to be connected with the moisture-proof box 11, and the other two openings are used as second open ends 122 to be respectively used for inserting a positive joint and a negative joint of the power battery 200. Like this, the three way connection cover that adopts to have three interface is as protective sheath 12, set up a bleeder vent 112 on dampproofing case 11 can, the first open end 121 of three way connection cover links to each other with dampproofing case 11 and communicates with holding chamber 111 through this bleeder vent 112, two second open ends 122 of three way connection cover are used for cup jointing two electric connection joint 22 of protection power battery respectively, like this, only need set up a bleeder vent 112 on dampproofing case 11 can, dampproofing case 11 structure is simpler, the production technology can be simplified, the connection between protective sheath 12 and the dampproofing case 11 is also simple relatively.

In this embodiment, the protective sleeve 12 is an elastic sleeve, such as a rubber sleeve or a silicone sleeve. The elastic sleeve has certain elastic deformation capacity, and can avoid the friction interference between the electric connection joint 22 and the protective sleeve 12 when the electric connection joint 22 is sleeved, so that the electric connection joint 22 is prevented from being worn.

In this embodiment, as shown in fig. 3, the moisture-proof device 10 further includes a sealing head 14, the sealing head 14 is detachably connected to the protective sheath 12, and the sealing head 14 seals the second open end 122 when the sealing head 14 is connected to the protective sheath 12. Like this, when dampproofing device 10 does not use, be connected sealing joint and protective sheath 12, sealing joint sealing protective sheath 12's second open end 122 avoids outside air to get into protective sheath 12 and holding chamber 111 from second open end 122, prolongs the life of 13 interior desiccants of holding chamber 111, ensures dampproofing effect of dampproofing device 10. Specifically, the sealing head 14 may be a plugging head that is plugged into the second open end 122 of the protection sleeve 12, and the sealing is achieved by plugging the plugging head into the second open end 122.

Example two:

as shown in FIGS. 4-6, a second embodiment of the present invention provides a power battery system. The power battery system comprises a power battery 200, wherein the power battery 200 comprises a shell 20 and a battery main body 30, a mounting cavity 21 is arranged in the shell 20, the battery main body 30 is mounted in the mounting cavity 21, and an electric connection joint 22 of the battery main body 30 extends out of the shell 20. The power battery system further comprises the moisture-proof device 10 of the above embodiment, and the electrical connection terminal 22 of the battery body 30 can be inserted into and sleeved in the protective sleeve 12 from the second open end 122 of the protective sleeve 12 of the moisture-proof device 10, as shown in fig. 4.

In the power battery system of the embodiment, the moisture-proof device 10 is arranged to protect the electrical connection terminal 22 of the power battery 200 from moisture, when the power battery 200 is in idle conditions such as transportation or storage, the electrical connection terminal 22 of the power battery 200 is in an exposed state, at this time, the electrical connection terminal 22 is sleeved in the protective sleeve 12, and the protective sleeve 12 protects the electrical connection terminal 22 from contacting with external moist air; moreover, due to the arrangement of the drying agent 13 in the accommodating cavity 111 of the moisture-proof box 11, the air in the protective sleeve 12 and the electric connection joint 22 can be kept dry all the time, the electric connection joint 22 is prevented from being wetted and rusted, the electric connection joint 22 is ensured to be normally and stably conductive, and the normal charging and discharging performance of the power battery 200 is ensured.

In this embodiment, the structure and the using manner of the moisture-proof device 10 are the same as those of the first embodiment, and the features that are not explained in this embodiment are all explained in the first embodiment, which is not described herein again.

Further, in the present embodiment, as shown in fig. 4, the housing 20 of the power battery 200 includes a first half 23 and a second half 24 detachably connected in the extending direction of the electrical connection tab 22, for example, when the electrical connection tab 22 extends in the length direction of the battery main body 30, the first half 23 and the second half 24 are two parts connected or detached in the length direction. Therefore, the first half part 23 and the second half part 24 are detachably connected to form the shell 20, the first half part 23 and the second half part 24 are surrounded to form the mounting cavity 21, and the battery body 30 is mounted in the mounting cavity 21, so that when the battery body 30 needs to be taken or examined, the first half part 23 and the second half part 24 can be detached, and the operations such as mounting and examining of the battery body 30 in the shell 20 are facilitated.

Specifically, in this embodiment, as shown in fig. 4 and fig. 5, a clamping groove 231 is disposed at an end of the first half portion 23 away from the electrical connection joint 22, a clamping block 241 inserted into the clamping groove 231 is disposed at an end of the second half portion 24 facing the electrical connection joint 22, two groove walls opposite to the clamping groove 231 are respectively provided with at least one positioning groove 2311, and an elastic positioning block 2411 is disposed at a position of the clamping block 241 corresponding to the positioning groove 2311. When the locking blocks 241 are inserted into the locking slots 231, the two elastic positioning blocks 2411 are correspondingly locked into the two positioning slots 2311.

When the housing 20 is assembled, the latch 241 of the second half 24 is aligned with the slot 231 of the first half 23, and the first half 23 and the second half 24 are pushed to approach each other by applying a force, so that the latch 241 is inserted into the corresponding slot 231, and the elastic positioning block 2411 is correspondingly latched into the positioning slot 2311, thereby completing the assembly of the housing 20. In this way, the first half part 23 and the second half part 24 of the housing 20 are matched with the clamping groove 231 through the clamping block 241 for clamping, and the connecting structure of the housing 20 is simple and convenient to assemble and disassemble; meanwhile, the positioning groove 2311 is arranged to be matched with the elastic positioning clamping block 241 in a clamping manner, so that whether the first half portion 23 and the second half portion 24 are connected in place or not is confirmed in an auxiliary manner, and the first half portion 23 is also used for preventing the first half portion 23 from being separated from the second half portion 24 in a clamping manner, so that the shell 20 has good connection stability.

Specifically, the elastic positioning block 2411 of the present embodiment may be an elastic rubber block connected to two sides of the fixture block 241, that is, the positioning block itself has elasticity, or the positioning block may be connected to the spring 2412 of the fixture block 241 and then connected to the free end of the spring 2412, and the positioning block is connected to the fixture block 241 through the spring 2412 to form an elastic positioning block 2411 structure.

In this embodiment, as shown in fig. 4, a handle 25 is further disposed at an end of the second half 24 away from the electrical connection joint 22, when the housing 20 needs to be disassembled, an operator holds the handle 25 with a hand, and forcibly pulls the first half 23 in a direction away from the electrical connection joint 22 to disengage the latch 241 from the corresponding slot 231, so that the first half 23 can be separated from the second half 24, and thus the housing 20 can be opened, and the battery body 30 in the mounting cavity 21 can be repaired or replaced.

In this embodiment, as shown in fig. 5, the positioning groove 2311 is an arc-shaped groove, and correspondingly, the end of the elastic positioning block 2411 facing the positioning groove 2311 is arc-shaped, so as to play a role of clamping and guiding, and improve the smoothness of the elastic positioning block 2411 sliding into the positioning groove 2311 or sliding out from the positioning groove 2311.

In this embodiment, as shown in fig. 4 and 5, a plurality of slots 231 are uniformly spaced at an end of the first half portion 23 away from the electrical connection joint 22, and a latch 241 is disposed at a position of the second half portion 24 corresponding to each slot 231. Set up a plurality of draw-in grooves 231 and a plurality of fixture block 241 cooperation joint, set up a plurality of constant head tanks 2311 and a plurality of elastically positioned piece 2411 joint cooperation simultaneously, improve shell 20 and connect the stability and the fastness of equipment.

Or, as an alternative to the above solution, in some other embodiments, the locking groove 231 may be an annular locking groove 231 disposed at an end of the first half 23, the locking block 241 is an annular locking block 241 disposed at the second half 24, a plurality of positioning grooves 2311 are respectively disposed on two opposite groove walls of the annular locking groove 231 at intervals, and the elastic positioning blocks 2411 are disposed at positions of the annular locking block 241 corresponding to the positioning grooves 2311. Like this, set up the draw-in groove 231 of annular form and trade the fixture block 241 cooperation joint of shape, set up a plurality of constant head tanks 2311 and a plurality of elastic locating piece 2411 joint cooperation simultaneously, also can improve the stability and the fastness that shell 20 connects the equipment equally.

In this embodiment, as shown in fig. 4 and 6, an anti-corrosion structure layer 40, such as a rubber layer, a plastic layer, or a glass fiber reinforced plastic layer, is covered on the exterior of the battery main body 30, a flame retardant structure layer 50 is covered on the exterior of the anti-corrosion structure layer 40, the flame retardant structure layer 50 may be formed by coating a gas generating type flame retardant coating or a heat absorbing type flame retardant coating on the anti-corrosion structure layer 40, and the electrical connection joint 22 sequentially passes through the anti-corrosion structure layer 40 and the flame retardant structure layer 50 and then extends out of the housing 20. In this way, by disposing the anti-corrosion structure layer 40 outside the battery main body 30 to cover the outer surface of the battery main body 30, the anti-corrosion structure layer 40 can protect the surface of the battery main body 30 from corrosion, and plays a role in protecting the battery main body 30; in addition, the flame-retardant structure layer 50 is arranged outside the anti-corrosion structure layer 40, and the flame-retardant structure layer 50 can protect the battery main body 30 in a high-heat state, so that spontaneous combustion of the battery main body 30 is avoided, and the use safety of the power battery 200 is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A moisture barrier, comprising:

the moisture-proof box is provided with an accommodating cavity, the side wall of the moisture-proof box is provided with an air hole, and the air hole is communicated with the accommodating cavity;

the protection sleeve is provided with a first opening end and a second opening end which are oppositely arranged, the first opening end is hermetically connected with the moisture-proof box and communicated with the air holes, and the second opening end is used for inserting and connecting an electric connection joint of the power battery so that the electric connection joint is sleeved in the protection sleeve;

the drying agent is contained in the containing cavity and used for absorbing moisture in the air in the containing cavity and the protective sleeve.

2. The moisture barrier of claim 1, further comprising: the lateral wall of the moisture-proof box is provided with two air holes at intervals, the moisture-proof box is connected with two protective sleeves in a sealing mode, the first opening end is communicated with the two air holes, and the second opening end is used for inserting a positive connector and a negative connector of a power battery.

3. The moisture barrier of claim 1, further comprising: the side wall of the moisture-proof box is provided with one air hole, the protective sleeve is a three-way joint sleeve, the three-way joint sleeve is provided with one first opening end and two second opening ends, and the two second opening ends are respectively used for inserting a positive electrode joint and a negative electrode joint of the power battery.

4. The moisture barrier of claim 1, further comprising: the protective sleeve is an elastic sleeve.

5. The moisture barrier of claim 1, further comprising: the dampproof device further comprises a sealing head, the sealing head is detachably connected with the protective sleeve, and when the sealing head is connected with the protective sleeve, the sealing head seals the second opening end.

6. A power battery system, characterized in that, including power battery and the dampproof device of any claim 1 ~ 5, power battery includes shell and battery main part, the shell is provided with the installation cavity, battery main part install in the installation cavity, battery main part's electric connection connects extends to outside the shell, and electric connection connects can insert and establish to in the cover from the second open end.

7. The power battery system of claim 6, wherein: the shell comprises a first half part and a second half part which are detachably connected along the extending direction of the electric connection joint, and the first half part and the second half part are surrounded to form the installation cavity.

8. The power battery system of claim 7, wherein: a clamping groove is formed in the end part, away from the electric connection joint, of the first half part, a clamping block which is in splicing fit with the clamping groove is arranged at the end part, facing the electric connection joint, of the second half part, at least one positioning groove is formed in each of two opposite groove walls of the clamping groove, and an elastic positioning block is arranged at the position, corresponding to the positioning groove, of the clamping block;

when the clamping blocks are inserted into the clamping grooves, the two elastic positioning blocks are correspondingly clamped into the two positioning grooves one by one.

9. The power battery system of claim 8, wherein: a plurality of clamping grooves are uniformly arranged at intervals on the end part of the first half part, which is far away from the electric connection joint, and the clamping blocks are arranged at positions of the second half part, which correspond to the clamping grooves;

or, the clamping groove is an annular clamping groove arranged at the end part of the first half part, the clamping block is an annular clamping block arranged at the second half part, a plurality of positioning grooves are respectively arranged on two opposite groove walls of the annular clamping groove at intervals, and the elastic positioning blocks are arranged at positions of the annular clamping block corresponding to the positioning grooves.

10. The power battery system according to any of claims 6 to 9, wherein: the battery comprises a battery body and is characterized in that an anti-corrosion structure layer covers the outer part of the battery body, a flame-retardant structure layer covers the outer part of the anti-corrosion structure layer, and the electric connection joint sequentially penetrates through the anti-corrosion structure layer and the flame-retardant structure layer and then extends out of the shell.

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