CN204303941U - Lithium battery management system waterproof packaging box, packaging structure and power supply system - Google Patents

Abstract

The utility model discloses a waterproof packaging box of lithium battery management system for the PCB board of encapsulation lithium battery management system, the PCB board includes mainboard and subplate, the waterproof packaging box of lithium battery management system includes casing and cover, be equipped with the encapsulation groove on the casing, the protruding mounting groove that is equipped with the installation mainboard in the encapsulation groove, set up the breach that supplies the subplate to stretch out on the cell wall of mounting groove, the tank bottom in the encapsulation groove becomes the subplate installing zone of installation subplate outside the breach, cover cooperation ground cover outside the mounting groove and with form the confession between the breach the subplate through-hole that the subplate cooperation passed, and have certain clearance between the lateral wall of cover and the cell wall of encapsulation groove and seal the district in order to form. The utility model discloses only need glue filling in the glue sealing area when encapsulating the PCB board, the mainboard can be sealed in the cover, and the glue filling is convenient, and the leakproofness is good, and dampproofing and waterproofing is effectual and difficult ageing. The utility model also discloses a lithium battery management system packaging structure and electric bicycle power battery electrical power generating system.

Description

Lithium battery management system waterproof packaging box, packaging structure and power supply system

technical field

The utility model relates to a lithium battery management system, in particular to a waterproof package of the lithium battery management system.

Background technique

Due to its excellent performance, lithium battery packs have been widely used in recent years. The emergence of lithium battery management systems has made it easier to manage and use lithium battery packs safely and efficiently. The electric vehicle battery management system (BMS) is especially an important link connecting the on-board power battery and electric vehicles. Its main functions include: real-time monitoring of battery physical parameters; battery state estimation; online diagnosis and early warning; charge, discharge and pre-charge control; management and thermal management, etc. However, for electric vehicles, especially electric bicycles, when it encounters rainy days or rainy seasons, its battery management system is likely to affect its normal work due to water ingress and damp.

For this reason, in the prior art, the lithium battery management system is now installed in a housing, and then waterproof glue is poured in the housing, and the entire lithium battery management system is sealed with waterproof glue. Although this method can achieve a waterproof effect, However, firstly, this solution requires waterproof glue to cover the entire circuit board of the lithium battery management system. The pouring area is large, which is a waste of material and packaging time. Second, when this solution is pouring waterproof glue, air is often mixed in the waterproof glue, so it solidifies There are too many air bubbles in the cured product of the waterproof glue, which will affect the waterproof effect and service life. Therefore, a new battery management system packaging structure is urgently needed.

Utility model content

The purpose of the utility model is to provide a waterproof packaging box for a lithium battery management system, which is used for packaging the battery management system. The packaging is simple and the waterproof sealing is good.

Another object of the present utility model is to provide a packaging structure for a lithium battery management system, which can seal the battery management system in a waterproof packaging box for the lithium battery management system, with simple packaging and good waterproof sealing.

Another object of the present utility model is to provide a power battery power system for electric bicycles, in which the battery management system is sealed in a waterproof packaging box for the lithium battery management system, the packaging is simple and the waterproof sealing is good.

In order to realize the purpose, the utility model discloses a lithium battery management system waterproof packaging box, which is used to package the PCB board of the lithium battery management system. The PCB board includes a main board and a sub-board formed by extending outward along the main board. , the sub-board is provided with an input terminal and an output terminal electrically connected to the lithium battery management system, the lithium battery management system waterproof packaging box includes a casing and a cover, and the casing is provided with a packaging groove, so A mounting groove for installing the main board of the PCB board is provided in the packaging groove, the groove wall of the mounting groove protrudes from the groove bottom of the packaging groove, and the groove wall of the mounting groove is provided with a groove for the sub-board protruding notch, the groove bottom of the packaging groove forms a sub-board installation area for installing the sub-board of the PCB board outside the notch; the cover is provided with an opening matching the notch, and the cover Fittingly cover the installation groove and form a through hole for the sub-board to fit through between the opening and the notch, and the side wall of the cover and the groove wall of the packaging groove There is a certain gap between them so that a sealing area is formed between the side wall of the cover and the groove wall of the packaging groove.

Compared with the prior art, the utility model uses a cover to seal the main board where the lithium battery management system is installed, and sets a sealing area outside the cover. When packaging the lithium battery management system, only need to pour waterproof glue in the sealing area That is, the area for pouring waterproof glue is less; on the other hand, the sealing area can guide the waterproof glue, which is not only convenient for glue filling, but also not easy to generate air bubbles, good waterproof effect and not easy to age; on the other hand, after packaging , The gap between the bottom of the cover and the installation groove is sealed at the bottom of the cured waterproof glue, which has good sealing performance and good waterproof and moisture-proof effect.

Preferably, the bottom of the notch is higher than the bottom of the packaging groove. This solution isolates the sealing area from the mounting groove at the bottom of the packaging groove, and facilitates the formation of a sub-board through hole between the cover and the gap. When the PCB board is installed, the sub-board and the sub-board communicate. The hole fits well, and the sub-board completely seals the through-hole of the sub-board to prevent the waterproof glue from entering the installation groove and wasting the waterproof glue during glue filling.

Specifically, a mounting frame protrudes from the groove bottom of the packaging groove at a position outside the notch, and a mounting area for the sub-board is formed on the mounting frame at a height equal to that of the notch. This solution allows the sub-board to be carried on the installation frame when the PCB board is installed, so that the installation of the PCB board is stable, and it is convenient for the waterproof glue to cover and fix the sub-board on the sealing area.

Preferably, the groove wall of the packaging groove surrounds the groove wall of the installation groove and the periphery of the sub-board installation area at a certain interval. This solution makes the structure of the packaging groove correspond to the PCB board, saves the area of the glue sealing area to the greatest possible extent, saves glue pouring materials, and increases the glue pouring speed.

Preferably, the cover includes a side wall covering the outside of the installation groove and a top wall closing the side wall, the opening is opened on the side wall of the cover, and the installation groove An engaging component is provided between the groove wall and the side wall, so that the cover closes the installation groove and is engaged with the installation groove. This solution facilitates the installation between the cover and the installation groove.

Specifically, fastening grooves are formed on the outer surface of the side wall of the cover and located in the sealing area, and the fastening grooves are long grooves distributed along the horizontal direction. More specifically, at least two fastening grooves are provided on each side wall of the cover, and the at least two fastening grooves are distributed in parallel. Wherein, the long groove may be a straight groove, or an arc groove or a wavy, curved or even zigzag long groove.

The utility model also discloses a lithium battery management system packaging structure, including a lithium battery management system waterproof packaging box, a PCB board and a cured waterproof glue. The lithium battery management system waterproof packaging box is as described above, and the PCB board A lithium battery management system is installed on the main board and installed in the installation slot, and the sub-board of the PCB protrudes out of the installation slot along the gap and is located in the installation area of the sub-board; the waterproof glue cured material is filled The sealing area is used to seal the cover in the package groove while directly wrapping and sealing the sub-board of the PCB board.

Preferably, there are two sub-boards and they are respectively located at both ends of the main board, the input and output terminals are respectively located on the two sub-boards, and there are two notches symmetrically located on the mounting both ends of the groove.

The utility model also discloses an electric bicycle power battery power supply system, which includes a battery box, a lithium battery installed in the battery box, and a lithium battery management system packaging structure. The lithium battery management system packaging structure is as described above. The battery box is provided with a load positive interface and a load negative interface, the positive electrode of the lithium battery is connected to the load positive interface of the battery box, and the negative electrode is electrically connected to the input end of the packaging structure of the lithium battery management system. The output end of the package structure of the battery management system is electrically connected to the negative interface of the load.

Description of drawings

Fig. 1a is a three-dimensional structural schematic diagram of the waterproof packaging box of the lithium battery management system described in the present invention.

Fig. 1b is a cross-sectional view of the waterproof packaging box of the lithium battery management system in Fig. 1a along line B-B.

Fig. 1c is a top view of the waterproof packaging box of the lithium battery management system in Fig. 1a.

Fig. 2 is an exploded perspective view of Fig. 1a.

Fig. 3 is a schematic structural view of the casing of the waterproof packaging box of the lithium battery management system shown in Fig. 1a.

Fig. 4 is a schematic structural view of the cover of the waterproof packaging box of the lithium battery management system in Fig. 1a.

Fig. 5a is a schematic diagram of the assembly of the PCB board and the casing of the waterproof packaging box of the lithium battery management system.

Figure 5b is a schematic diagram of the assembly of the PCB board and the waterproof packaging box of the lithium battery management system.

Fig. 5c is a structural schematic diagram of the packaging structure of the lithium battery management system described in the present invention.

Fig. 5d is a cross-sectional view along line C-C of the package structure of the lithium battery management system in Fig. 5c.

Fig. 6 is an exploded schematic view of Fig. 5b.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

1a to 2, the utility model discloses a lithium battery management system waterproof packaging box 10, the lithium battery management system waterproof packaging box 10 includes a housing 11 and a cover 12 for mounting a PCB board 20 (as shown in FIG. 5a and 5b), referring to FIG. 6, the PCB board 20 includes a main board 21 and a sub-board 22 extending outward along the main board 21, and the sub-board 22 is provided with the lithium battery management system. Electrically connected input terminal 31 and output terminal 32; referring to Fig. 2 and Fig. 3, the housing 11 is provided with a packaging groove 41, and the packaging groove 41 is provided with a mounting groove for installing the main board 21 of the PCB board 20 42. The groove wall 421 of the installation groove 42 protrudes from the groove bottom of the packaging groove 41, and the groove wall 421 of the installation groove 42 is provided with a gap 422 for the sub-plate 22 to protrude. The bottom of the groove 41 is outside the notch 422 to form a sub-board installation area 43 for installing the sub-board 22 of the PCB board 20; referring to Fig. 1a, Fig. 1b, and Fig. Out of the slot 42, the cover 12 is provided with an opening 122 that matches the notch 422, so that a sub-plate passage for the sub-plate 22 to fit through is formed between the opening 122 and the notch 422. hole 46 (as shown in Figure 1b and Figure 5d), and there is a certain gap between the side wall 121 of the cover 12 and the groove wall 411 of the packaging groove 41 so that the side wall 121 of the cover 12 and the packaging groove A sealing area 44 is formed between the groove walls 411 of the groove 41 (as shown in FIG. 1c ).

Preferably, referring to FIG. 2 and FIG. 5 , the bottom 422 a of the notch 422 is higher than the bottom of the packaging groove 41 . This solution completely isolates the sealant 33 from the mounting groove 42 at the bottom of the packaging groove 41 . Specifically, a mounting frame 43a protrudes from the bottom of the packaging groove 411 outside the notch 422, and the sub-board mounting area 43 having the same height as the notch 422 is formed on the mounting frame 43a. . 5a, when the main board 21 of the PCB board 20 is installed in the installation groove 42, the sub-board 22 of the PCB board 20 is installed on the sub-board installation area 43 of the installation frame 43a through the gap 422, At this time, the sub-board 22 is loaded on the bottom 422 a of the notch 422 and the mounting bracket 43 a, which facilitates the installation of the PCB board 20 . In this embodiment, the mounting frame 43a is a frame body that forms a closed rectangular section with the bottom 422a of the notch 422, and the height of the entire frame body is equal to the gap 422. Of course, the mounting frame 43a can also be a mounting platform. , as long as the area where the installation table is connected to the notch forms a table or installation surface with the same height as the notch 422 .

Preferably, referring to FIG. 2 and FIG. 3 , the groove wall 411 of the packaging groove 41 surrounds the groove wall 421 of the installation groove 42 and the periphery of the sub-board mounting area 43 at a certain interval. This solution makes the structure of the package groove 41 correspond to the PCB board 20 , saves the area of the glue sealing area 44 to the greatest possible extent, saves glue filling materials, and increases the glue filling speed. Of course, the package slot 41 may also be other closed slots that are not similar in structure to the PCB board 20 .

Preferably, referring to FIG. 2 and FIG. 4 , the cover 12 includes a side wall covering the outside of the groove wall 421 of the installation groove 42 and a top wall closing the side wall, and the opening 122 is opened in the On the side wall of the cover 12, the groove wall 421 of the installation groove 42 is provided with an engaging groove 451 (as shown in FIG. When the cover 12 is installed outside the installation groove 42, the side wall of the cover 12 is engaged with the installation groove 42. Wherein, the engaging groove 451 and the engaging protrusion 452 constitute an engaging assembly that engages and connects the cover 12 and the mounting groove 42 together, but the structure of the engaging assembly is not limited thereto, and other engaging structures also belong to this invention. Protection scope of utility models.

Preferably, referring to Fig. 1a, Fig. 2 and Fig. 4, a fastening groove 123 is opened on the outer surface of the side wall of the cover 12 and located in the sealing area 44, and the fastening groove 123 is along the horizontal Long grooves distributed in different directions. More specifically, at least two fastening grooves 123 are provided on each of the side walls of the cover, and the at least two fastening grooves 123 are distributed in parallel. Wherein, the long groove may be a straight groove, or an arc groove or a wavy, curved or even zigzag long groove.

Referring to Figure 5b to Figure 6, the utility model also discloses a lithium battery management system packaging structure 100, continue to refer to Figure 5b to Figure 6, the lithium battery management system packaging structure 100 includes a lithium battery management system waterproof packaging box 10, a PCB board 20 and waterproof glue cured product 30; referring to Fig. 5a and Fig. 5b, a lithium battery management system BMS is installed on the main board 21 of the PCB board 20, and the main board 21 is installed in the installation groove 42, and the PCB board The sub-board 22 of 20 protrudes from the installation groove along the gap 422 and is located in the sub-board installation area 43; referring to Fig. 5c and Fig. 5d, the waterproof glue curing material 30 fills the sealing area 44 to While directly wrapping and sealing the sub-board 22 of the PCB board 20 , the cover 12 is sealed in the packaging groove 41 .

Preferably, referring to FIG. 6, there are two sub-boards 22 and they are located at both ends of the main board 21 respectively, and the input terminals 31 and output terminals 32 are located on the two sub-boards 22 respectively. There are two 422 and they are symmetrically arranged at both ends of the installation groove 42 .

Referring to Figures 5a to 5d, the packaging process of packaging the PCB board 20 installed with the battery management system BMS into a lithium battery management system waterproof packaging box is described: as shown in Figure 5a, the PCB board 20 is mounted on the In the housing 11, the main board 21 of the PCB board 20 is installed in the installation groove 42, and at this time, the sub-board 22 of the PCB board 20 is installed in the sub-board installation area 43 of the installation frame 43a through the gap 422 Above; referring to Figure 5b, cover the cover 12 outside the installation groove 42, and when the cover 12 is engaged and connected by the snap-fit components (451, 452), the opening 122 of the cover 12 and the gap of the installation groove 42 422 just forms the sub-board through hole 46 through which the sub-board 22 passes, that is, the cover 12 seals the main board 21 in the installation groove 41, and forms a sealing area 44 between the side wall of the cover 12 and the groove wall of the packaging groove 41 ; With reference to Fig. 5c and Fig. 5d, glue is poured in the sealing area 44, and the waterproof glue is poured into the sealing area 33 along the passage in the sealing area 44, and the waterproof glue 44 invades the sub-plate 22 and closes the entire sub-plate Board through hole 46, the waterproof glue is cured to form a waterproof glue cured product 30, at this time, the waterproof glue cured product 30 fills the sealing area 44, so as to directly wrap and seal the sub-board 22 of the PCB board 20 Sealing and installing the cover 12 in the packaging groove 41 constitutes the lithium battery management system packaging structure 100 of the present invention. Wherein, the waterproof glue cured product 30 can fill the entire sealing area 44, or can only be filled on the sub-board 22, only need to make the waterproof glue cured product 30 wrap and seal the sub-board 22 and the cover of the PCB board 20 12 at the bottom. Wherein, if the input terminal 31 and the output terminal 32 do not have lead wires, then it is necessary to set up a lead-out interface 33 (as shown in Figure 5c) on the input terminal 31 and the output terminal 32, and the signals of the input terminal 31 and the output terminal 32 are drawn out to facilitate The lithium battery management system packaging structure 100 is electrically connected to the lithium battery.

Compared with the prior art, the lithium battery management system packaging structure 100 of the utility model uses the cover 12 to seal the main board 21 on which the lithium battery management system is installed, and sets a sealing area 44 outside the cover 12. When packaging the lithium battery management system , it only needs to pour waterproof glue in the glue sealing area 44, and there are few areas for pouring waterproof glue; The waterproof effect is good and it is not easy to age; on the other hand, after packaging, the gap between the bottom of the cover 12 and the installation groove 42 is covered by the bottom of the waterproof glue cured product 30, which has good sealing performance and good waterproof and moisture-proof effect.

The utility model also discloses an electric bicycle power battery power supply system, comprising a battery box (not shown in the figure), a lithium battery (not shown in the figure) installed in the battery box (not shown in the figure) and a lithium battery Management system packaging structure 100, the battery box is provided with a load positive interface and a load negative interface, the positive electrode of the lithium battery is connected to the load positive interface of the battery box, and the negative electrode is connected to the lithium battery management system packaging structure 100 The input terminal B- is electrically connected, the output terminal P- of the lithium battery management system packaging structure 100 is electrically connected to the load negative interface, and the casing 11 of the lithium battery management system packaging structure is reversed (the packaging groove 41 faces The direction of the battery box) is covered on the battery box to close the battery box, which is easy to install. When the electric bicycle power battery power supply system is used, it is only necessary to connect the load positive pole interface and the load negative pole interface of the battery box to the positive pole and the negative pole of the load respectively.

What is disclosed above is only the preferred embodiment of the present utility model, and of course the scope of rights of the present utility model cannot be limited with this. Therefore, the equivalent changes made according to the patent scope of the utility model still belong to the scope covered by the utility model .

Claims (9)

1. A waterproof packaging box for a lithium battery management system, characterized in that it is used to package the PCB board of the lithium battery management system, the PCB board includes a main board and a sub-board extending outward along the main board, the sub-board An input terminal and an output terminal electrically connected to the lithium battery management system are provided on it. The waterproof packaging box of the lithium battery management system includes a casing and a cover. The casing is provided with a packaging groove, and the packaging groove is provided There is an installation groove for installing the main board of the PCB board, the groove wall of the installation groove protrudes from the groove bottom of the packaging groove, and the groove wall of the installation groove is provided with a gap for the auxiliary board to protrude from, The groove bottom of the packaging groove forms a sub-board installation area for installing the sub-board of the PCB board outside the notch; the cover is provided with an opening that matches the notch, and the cover is matched to cover the sub-board. Outside the mounting groove and between the opening and the notch is formed a sub-board through hole for the sub-board to fit through, and there is a certain gap between the side wall of the cover and the groove wall of the packaging groove A sealing area is formed between the side wall of the cover and the groove wall of the packaging groove. 2. The waterproof packaging box for the lithium battery management system according to claim 1, wherein the bottom of the notch is higher than the bottom of the packaging groove. 3. The waterproof packaging box for a lithium battery management system according to claim 2, wherein a mounting bracket is protruded from the bottom of the packaging groove at a position outside the notch, and a mounting bracket is formed on the mounting bracket. The height of the notch is equal to the installation area of the sub-board. 4 . The waterproof packaging box for the lithium battery management system according to claim 1 , wherein the groove wall of the packaging groove surrounds the groove wall of the installation groove and the periphery of the sub-board installation area at a certain distance. 5. The waterproof packaging box for a lithium battery management system according to claim 1, wherein the cover includes a side wall covering the outside of the installation groove and a top wall that closes the side wall. The opening is set on the side wall of the cover, and an engaging component is provided between the groove wall of the installation groove and the side wall, so that the cover closes the installation groove and engages with the installation groove connect. 6. The waterproof packaging box for a lithium battery management system according to claim 1, wherein a fastening groove is opened on the side wall of the cover and on the outer surface located in the sealing area, and the fastening groove It is a long groove distributed along the horizontal direction. 7. The lithium battery management system waterproof packaging box according to claim 6, wherein at least two fastening grooves are provided on each of the side walls of the cover, and the at least two fastening grooves Parallel distribution. 8. A lithium battery management system packaging structure, characterized in that it includes a lithium battery management system waterproof packaging box, a PCB board and a cured waterproof glue, and the lithium battery management system waterproof packaging box is as in any one of claims 1-7 As mentioned in the item above, the lithium battery management system is installed on the main board of the PCB board and installed in the installation slot, and the sub-board of the PCB board protrudes out of the installation slot along the gap and is located in the installation slot of the sub-board. area; the waterproof glue cured product fills the sealing area, so as to seal the cover in the packaging groove while directly wrapping and sealing the sub-board of the PCB board. 9. An electric bicycle power battery power supply system, characterized in that it includes a battery box, a lithium battery installed in the battery box and a lithium battery management system packaging structure, and the lithium battery management system packaging structure is as claimed in claim 8 As described above, the battery box is provided with a load positive interface and a load negative interface, the positive electrode of the lithium battery is connected to the load positive interface of the battery box, and the negative electrode is electrically connected to the input end of the packaging structure of the lithium battery management system. The output end of the packaging structure of the lithium battery management system is electrically connected to the negative interface of the load.