CN213401368U - Waterproof structure of lithium battery protection board - Google Patents

Abstract

The utility model belongs to the technical field of lithium battery protection boards, and discloses a waterproof structure of a lithium battery protection board, which comprises a bottom shell and a shell cover which are matched with each other, wherein a sealing installation cavity is formed by matching the inside of the bottom shell and the inside of the shell cover, and a circuit board is installed in the sealing installation cavity; the edges of the three adjacent sides of the shell cover extend downwards to form side plates, the three side plates are connected end to form a U-shaped structure and cover the outer side of the bottom shell, and sealing clamping strips are arranged on the inner walls of the three side plates; sealing grooves are formed in the outer walls of three adjacent sides of the bottom shell, and the three sealing grooves are respectively matched with the three sealing clamping strips; a sealing barrier strip is arranged at the bottom of the shell cover and is matched with the inner wall of one side of the bottom shell, which is not provided with the sealing groove; in conclusion, based on the arrangement of the sealing clamping strip and the sealing barrier strip, the sealing of the connection part of the sealing clamping strip and the sealing barrier strip is realized, so that the integral structure has good sealing and waterproof performance.

Description

Waterproof structure of lithium battery protection board

Technical Field

The utility model belongs to the technical field of lithium battery protection shield, concretely relates to lithium battery protection shield's waterproof construction.

Background

The lithium battery protection board mainly aims at protecting the charging and discharging of the series lithium battery pack, but the existing lithium battery protection board has poor waterproof performance, so that the lithium battery protection board is very easy to be affected with damp in an environment with high humidity, and the protection effect cannot be achieved;

in order to solve the above problems, in patent CN208478511U, a waterproof lithium battery protection board is disclosed, in which a closed housing is formed by combining a heat dissipation board and an injection molding glue, so as to achieve the purposes of heat dissipation and water resistance; however, based on the structure and principle disclosed in the patent, the interface connected to the circuit board is still located outside the integrated protection board, so that complete sealing and waterproof cannot be achieved; in addition, the injection molding body formed by injection molding is connected with the circuit board, so that the whole protection plate cannot be disassembled, assembled, overhauled and replaced.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the deficiencies in the above background art, the present invention provides a waterproof structure for a lithium battery protection board.

In order to achieve the above object, the utility model provides a following technical scheme: a waterproof structure of a lithium battery protection plate comprises a bottom shell and a shell cover which are matched with each other, wherein a sealed installation cavity is formed in the bottom shell and the shell cover in a matched mode, and a circuit board is installed in the sealed installation cavity;

the edges of the three adjacent sides of the shell cover extend downwards to form side plates, the three side plates are connected end to form a U-shaped structure and cover the outer side of the bottom shell, and sealing clamping strips are arranged on the inner walls of the three side plates;

sealing grooves are formed in the outer walls of three adjacent sides of the bottom shell, and the three sealing grooves are matched with the three sealing clamping strips respectively;

a sealing barrier strip is arranged at the bottom of the shell cover and is matched with the inner wall of one side of the bottom shell, which is not provided with the sealing groove;

and a detachable fixing component is connected between the shell cover and the bottom shell, and the fixing component and the sealing barrier strip are arranged in parallel and are positioned on the outer side of the bottom shell.

Preferably, the fixing assembly comprises a fixing bolt and at least two limiting blocks sleeved on the fixing bolt, two ends of the fixing bolt penetrate through the two parallel side plates respectively, and the limiting blocks are located between the two parallel side plates and contact with the outer wall of one side of the bottom shell, on which the sealing groove is not formed.

Preferably, the two ends of the circuit board are respectively provided with a first wire and an interface, the interface is connected with a flat cable socket in a clamping manner and is connected with a second wire through the flat cable socket, and the first wire and the second wire respectively penetrate through two side walls of the bottom shell.

Preferably, all imbed detachable bunch cover on the both sides wall of drain pan, the bunch is sheathe in and is seted up the through wires hole, just the through wires hole is used for passing first wire or second wire.

Preferably, the space between the threading hole and the first and second wires is filled with a sealant, and the sealant is a waterproof adhesive.

Preferably, one side integrated into one piece of bunch cover has sealed fixed plate, sealed fixed plate is located the drain pan inside to be connected with the drain pan inner wall through dismantling the bolt.

Preferably, the bottom of the circuit board is connected with a heat-conducting silica gel plate, and the surface wall of the heat-conducting silica gel plate is in contact with the inner wall of the bottom shell.

Compared with the prior art, the utility model, following beneficial effect has:

(1) in the utility model, a bottom shell and a shell cover with heat dissipation effect are arranged, and a sealing clamping strip and a sealing barrier strip are arranged between the bottom shell and the shell cover to realize the sealing of the connection part, so that the whole structure has good sealing and waterproof performance;

in addition, form fixedly through the cooperation of bolt and stopper between drain pan and the cap to guarantee the stability that drain pan and cap are connected, its bolt and stopper all are located the drain pan outside, can effectively guarantee overall structure's integrality from this, thereby further improve the sealed water-proof effects between drain pan and the cap.

(2) Aiming at the bottom shell, the side wall of the bottom shell is hermetically penetrated with the wire bundling sleeve, so that a lead connected between the circuit board and the lithium battery can conveniently penetrate through the wire bundling sleeve, and sealant is filled between the lead and the wire bundling sleeve to realize the sealing and the water proofing of the lead; and the wire harness sleeve is detachably connected with the bottom shell, so that the whole circuit board can be detached.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

FIG. 3 is a schematic structural view of the present invention;

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

FIG. 5 is an enlarged view taken at A in FIG. 3;

FIG. 6 is an enlarged view of FIG. 4 at B;

in the figure: the structure comprises a bottom shell-1, a sealing groove-11, a wire harness sleeve-12, a sealant-13, a sealing fixing plate-14, a shell cover-2, a side plate-21, a sealing clamping strip-22, a sealing barrier strip-23, a circuit board-3, a first lead-31, an interface-32, a second lead-33, a heat-conducting silica gel plate-34, a fixing component-4, a fixing bolt-41 and a limiting block-42.

Detailed Description

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

Referring to fig. 1-6, the present invention provides the following technical solutions: a waterproof structure of a lithium battery protection plate comprises a bottom shell 1 and a shell cover 2 which are matched with each other, wherein a sealed installation cavity is formed in the bottom shell 1 and the shell cover 2 in a matched mode, and a circuit board 3 is installed in the sealed installation cavity (the circuit board 3 is represented as a lithium battery protection plate with a protection function);

the edges of three adjacent sides on the shell cover 2 extend downwards to form side plates 21, the three side plates 21 are connected end to form a U-shaped structure and are coated on the outer side of the bottom shell 1, and sealing clamping strips 22 are arranged on the inner walls of the three side plates 21;

the outer walls of three adjacent sides of the bottom shell 1 are provided with sealing grooves 11, and the three sealing grooves 11 are respectively matched with the three sealing clamping strips 22;

a sealing barrier strip 23 is arranged at the bottom of the shell cover 2, and the sealing barrier strip 23 is matched with the inner wall of one side of the bottom shell 1, which is not provided with the sealing groove 11;

the detachable fixing component 4 is connected between the shell cover 2 and the bottom shell 1, and the fixing component 4 is arranged in parallel with the sealing barrier strip 23 and is positioned on the outer side of the bottom shell 1.

The following steps: the three side plates 21 extend downwards to form primary outer side seals corresponding to the three sides, and the three sealing clamping strips 22 are matched with the three sealing grooves 11 to form secondary outer side seals corresponding to the three sides, so that the sealing effect of the three side plates corresponding to the three sides is effectively ensured; the sealing bar 23 is used to seal the other side, thereby ensuring the integrity of the seal between the bottom case 1 and the case cover 2, and providing a good waterproof seal in the sealed installation cavity.

Further, the fixing assembly 4 includes a fixing bolt 41 and at least two limiting blocks 42 sleeved on the fixing bolt 41, two ends of the fixing bolt 41 respectively penetrate through the two parallel side plates 21, and the limiting blocks 42 are located between the two parallel side plates 21 and contact with the outer wall of the bottom case 1 on the side where the sealing groove 11 is not formed.

Based on this structure can know, fixed subassembly 4 has good spacing and can dismantle the effect, guarantees complex stability between drain pan 1 and the cap 2 on the one hand, and on the other hand then through the dismantlement of fixed subassembly 4 for also can slide between cap 2 and the drain pan 1 and dismantle, and then be convenient for realize fixing and taking out of circuit board 3.

Furthermore, a first wire 31 and a connector 32 are respectively disposed at two ends of the circuit board 3, a flat cable socket is connected to the connector 32 in a snap-fit manner, and a second wire 33 is connected to the connector through the flat cable socket, and the first wire 31 and the second wire 33 respectively penetrate through two side walls of the bottom case 1.

Specifically, detachable bunch covers 12 are embedded into two side walls of the bottom case 1, a threading hole is formed in each bunch cover 12, and the threading hole is used for penetrating through the first wire 31 or the second wire 33. Therefore, stable limiting during installation of the first lead 31 and the second lead 33 is achieved, the sealant 13 is filled between the threading hole and the first lead 31 and the second lead 33, the sealant 13 is waterproof, sealing at the installation position of the first lead 31 and the second lead 33 is effectively achieved, and sealing waterproofness of the whole structure is further improved.

It should be noted that, a sealing fixing plate 14 is integrally formed on one side of the wire harness sleeve 12, and the sealing fixing plate 14 is located inside the bottom case 1 and connected to the inner wall of the bottom case 1 through a detachable bolt. Specifically, as can be seen from fig. 3 and 5, the size of the sealing fixing plate 14 is larger than that of the wire harness sleeve 12, so that the sealing fixing plate 14 can effectively seal the wire harness sleeve 12 and the bottom case 1 when being attached to the inner wall of the bottom case 1, thereby ensuring the installation stability of the wire harness sleeve 12 and ensuring the sealing and waterproof performance of the corresponding structure.

In addition, the bottom of the circuit board 3 is connected with a heat-conducting silica gel plate 34, and the surface wall of the heat-conducting silica gel plate 34 contacts with the inner wall of the bottom case 1. From this, make heat on the circuit board 3 can transmit to drain pan 1 fast through the heat conduction of heat conduction silica gel board 34, drain pan 1 and outside air contact to effectively realize the heat dissipation of circuit board 3 during operation.

The utility model discloses a theory of operation and use flow assemble the utility model provides a lithium battery protection shield's waterproof construction during (using figure 3 to show as an example):

first, the case cover 2 is pulled to the right (at this time, the fixing member 4 is not mounted), thereby causing the bottom case 1 to be opened;

then, assembling the circuit board 3, and sleeving a wire bundling sleeve 12 on the first lead 31 and the second lead 33 at the two ends of the circuit board 3;

then, fixing the circuit board 3 in the bottom case 1, and embedding the two wire harness sleeves 12 in corresponding mounting holes on two sides of the bottom case 1 respectively;

then, the sealing fixing plate 14 is fixed on the inner wall of the bottom shell 1 by using a detachable bolt so as to fix the wire bundling sleeve 12; adjusting the positions of the first lead 31 and the second lead 33, and filling sealant 13 (waterproof glue) between the threading hole on the bunch cover 12 and the first lead 31 and the second lead 33;

then, the shell cover 2 is pushed to the left, so that the side plate 21 on the right side of the shell cover 2 is in contact with the outer wall of the bottom shell 1, and the corresponding three sealing clamping strips 22 are matched with the sealing grooves 11;

then, two limiting blocks 42 are disposed between the two parallel side plates 21, and one side of the limiting block 42 is tightly abutted to the left side wall of the bottom case 1, and the fixing bolt 41 is screwed into the side plate 21 and sequentially penetrates through the two limiting blocks 42, so as to fix the bottom case 1 and the case cover 2.

The following steps: the left fixing component 4 is matched with the three side plates 21 to limit the bottom shell 1 and the shell cover 2 in the horizontal direction; the three sealing strips 22 are matched with the three sealing grooves 11 to realize the limitation of the bottom shell 1 and the shell cover 2 in the longitudinal direction; the three sealing clamping strips 22 are matched with the left sealing barrier strip 23 to realize the sealing of the bottom shell 1 and the shell cover 2; in conclusion, the stable installation of the circuit board 3 (lithium battery protection board) is realized, and the sealing and waterproof protection of the circuit board 3 is also realized.

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

Claims (7)

1. The utility model provides a waterproof construction of lithium battery protection shield which characterized in that: the circuit board comprises a bottom shell (1) and a shell cover (2) which are matched with each other, wherein a sealed installation cavity is formed by matching the bottom shell (1) and the shell cover (2) in the inner part, and a circuit board (3) is installed in the sealed installation cavity;

the three adjacent side edges of the shell cover (2) extend downwards to form side plates (21), the three side plates (21) are connected end to form a U-shaped structure and are coated on the outer side of the bottom shell (1), and sealing clamping strips (22) are arranged on the inner walls of the three side plates (21);

sealing grooves (11) are formed in the outer walls of three adjacent sides of the bottom shell (1), and the three sealing grooves (11) are respectively matched with three sealing clamping strips (22);

a sealing barrier strip (23) is arranged at the bottom of the shell cover (2), and the sealing barrier strip (23) is matched with the inner wall of one side of the bottom shell (1) which is not provided with the sealing groove (11);

the sealing structure is characterized in that a detachable fixing component (4) is connected between the shell cover (2) and the shell (1), and the fixing component (4) and the sealing barrier strip (23) are arranged in parallel and are positioned on the outer side of the shell (1).

2. The waterproof structure of a lithium battery protection plate as claimed in claim 1, wherein: the fixing assembly (4) comprises a fixing bolt (41) and at least two limiting blocks (42) sleeved on the fixing bolt (41), two parallel side plates (21) are respectively penetrated through two ends of the fixing bolt (41), the limiting blocks (42) are located between the two parallel side plates (21) and are in contact with the outer wall of one side of the bottom shell (1) without the sealing groove (11).

3. The waterproof structure of a lithium battery protection plate as claimed in claim 1 or 2, wherein: the both ends of circuit board (3) are equipped with first wire (31) and interface (32) respectively, the block is connected with the winding displacement socket on interface (32) to be connected with second wire (33) through the winding displacement socket, first wire (31) and second wire (33) pass the both sides wall of drain pan (1) respectively.

4. The waterproof structure of a lithium battery protection plate as claimed in claim 3, wherein: the two side walls of the bottom shell (1) are respectively embedded with a detachable wire bundling sleeve (12), the wire bundling sleeve (12) is provided with a threading hole, and the threading hole is used for penetrating through a first wire (31) or a second wire (33).

5. The waterproof structure of a lithium battery protection plate as claimed in claim 4, wherein: all pack between threading hole and first wire (31) and second wire (33) and have sealed glue (13), just sealed glue (13) are waterproof glue.

6. The waterproof structure of a lithium battery protection plate as claimed in claim 5, wherein: one side integrated into one piece of wire harness cover (12) has sealed fixed plate (14), sealed fixed plate (14) are located drain pan (1) inside to be connected with drain pan (1) inner wall through dismantling the bolt.

7. The waterproof structure of a lithium battery protection plate as claimed in claim 1, wherein: the bottom of circuit board (3) is connected with heat conduction silica gel board (34), just the table wall and drain pan (1) inner wall of heat conduction silica gel board (34) contact.

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