Battery pack structure with air-cooled upper cover

Abstract

The utility model discloses an upper cover air-cooled heat dissipation battery pack structure which comprises an outer box, a battery module and a BDC module, and the outer box comprises an upper cover for assembling the BDC module and a box body for assembling the battery module; a charging port, a discharging port, a handle and a fan are arranged on the surface of the upper cover; a handle is arranged on the outer side of the box body; the battery module is formed by connecting a plurality of battery cells in series and is fixedly mounted in the box body; and the BDC module is assembled between the battery module and the upper cover and is fixed on the back of the upper cover. The air-cooling heat dissipation design is adopted, heat of the battery pack is discharged from the upper cover fan and the heat dissipation holes from bottom to top, the structure provides sufficient heat dissipation conditions for the battery pack, and the internal temperature of the battery is improved. Besides, the BDC module and the battery module adopt a split type design, and the BDC module is integrally arranged on the upper cover, so that a battery pack structure with high safety performance is provided for the large-electric-quantity battery module.

Description

TECHNICAL FIELD

[0001] The utility model belongs to battery technical field, concretely relates to a top cover air -cooled heat dissipation battery package structure. BACKGROUND

[0002] The existing battery package usually adopts multiple lithium ion cells, and a BDC (Bi-directional DC-DC Converter) module is arranged in the lithium battery package to monitor the lithium battery. In the existing battery package structure, the battery management system is usually fixed together with the lithium battery pack. This structure is not safe, and the heat generated by the battery pack and the BDC module during the working process of the battery package will affect the service life of the battery, and even cause safety accidents.

[0003] The conventional natural heat dissipation battery package structure is not suitable for large-capacity battery package and BDC module heat dissipation. For example, a battery package of an electric bicycle is provided in Chinese patent application No. CN211252908U, which includes a main body, a first protective plate is arranged on one end of the outer surface of the main body, a charging plug is arranged on one end of the outer surface of the first protective plate, a second protective plate is arranged on the other end of the outer surface of the main body, a disassembly cover is arranged on the upper end of the outer surface of the main body, a pull rod is arranged on the upper end of the outer surface of the disassembly cover, connecting blocks are arranged on the two ends of the outer surface of the disassembly cover, a limiting hole is arranged in the front end of the connecting block, an inlay groove is arranged on the outer surface of the main body on the upper end of the inner surface of the connecting block, and a disassembly mechanism is arranged on the front side of the connecting block on the upper end of the main body. The internal heat of this kind of battery package is not effectively dissipated by natural cooling, which easily causes the internal temperature to be too high, resulting in large internal loss of the battery, causing the battery to appear heat aggregation phenomenon, and even causing explosion, fire, and endangering life and property safety. SUMMARY

[0004] In view of the above, the utility model provides a top cover air-cooled heat dissipation battery package structure, which adopts a BDC module and a battery module in a separate design, is simple in structure, high in safety, and easy to disassemble.

[0005] A top cover air-cooled heat dissipation battery package structure includes an outer box, a BDC module and a battery module, the battery module and the BDC module are both fixedly installed in the outer box, the BDC module is connected with the battery module for monitoring and controlling the operation of the battery module.

[0006] The outer box includes a top cover and a box body, the top cover is detachably fixed on the top of the box body, the surface of the top cover is provided with a charging port, a discharging port, a fan assembly and a handle, and the side surface is provided with heat dissipation holes for the battery module and the BDC module in the box body to dissipate heat outward; the BDC module is fixed to the inner side of the top cover and located between the battery module and the top cover.

[0007] Further, the box side is provided with a handle for facilitating flat carrying, so that the battery pack is more convenient to carry in the horizontal direction of the ground.

[0008] Further, the heat dissipation hole and the fan assembly are located in the same horizontal plane, which ensures that the upper cover provides sufficient heat dissipation space for the fan assembly, avoids the surface of the upper cover being too hot after the battery pack works, and reduces the influence of the temperature of the battery pack on the use of the handle during carrying.

[0009] Further, the upper cover and the box edge are connected by screws and sealed by sealing glue, so that the battery pack structure reaches the IP65 waterproof level.

[0010] Further, the battery module includes a battery pack shell and a battery cell in the shell, the battery cell is connected in series and parallel by a copper bar, and adjacent battery cells are separated by a partition; the battery module is fixed in the box by a glue filling method, or is fixed and installed in the box by a pressing strip and screws, and shock-absorbing foam is arranged between the bottom of the battery pack shell and the box to achieve a shock-absorbing effect.

[0011] Further, the BDC module includes a PCBA board and a heat sink, one side of the heat sink is fixed in the inner side of the upper cover by a connecting piece, and the other side is connected and fixed with the PCBA board by a connecting piece; the heat sink is attached to the upper surface of the PCBA board and faces the fan assembly, and can discharge the heat of the key power devices on the PCBA board outward through the heat dissipation hole and the air cooling condition provided by the fan assembly.

[0012] Further, the lower surface of the PCBA board is provided with a Mylar sheet, which plays an insulating role between the battery module; a sealing strip is arranged between the heat sink and the upper cover, and in the installed state, the sealing strip is in a compressed state, so that the battery pack structure is sealed to achieve the IP65 waterproof level.

[0013] Further, the fan assembly is composed of a fan cover plate and a fan, and the fan is fixed on the upper cover by screws and a fan cover plate, so that the fan can be taken out of the upper cover by disassembling the fan cover plate, which is convenient and easy to disassemble.

[0014] Further, the battery pack structure is also provided with a 4G module, the 4G module is embedded in the upper cover by screws, and a sealing strip is arranged between the shell of the 4G module and the contact surface of the upper cover, so that the battery pack structure reaches the IP65 waterproof level.

[0015] Based on the above technical scheme, the utility model has the following beneficial technical effects:

[0016] 1. Good waterproof effect; the utility model discloses because the sealing glue sealing is carried out to the upper cover and the rim connecting place of box body, increases the rubber strip to the radiator and the upper cover connecting place of BDC module setting, all play the waterproof effect, to avoid the inside structure of box body because of waterlogging is damaged, make the upper cover air cooling heat dissipation battery package structure meet IP65 waterproof grade.

[0017] 2. Good heat dissipation effect; the utility model discloses because the BDC module power consumption of big electric quantity battery package structure adopts, the heat dissipation demand is high, adopts the fan heat dissipation mode, provides sufficient condition for battery package internal heat dissipation, and the fan is placed in the upper cover, and the dismounting is convenient, and simplifies the assembly maintenance.

[0018] 3. Structure integration, assembly is more convenient; the utility model discloses the fan is integrated and is set up in the upper cover, and the component can be directly assembled and disassembled from the upper cover position, and the BDC module is fixed to the back of the upper cover, and the battery module is fixed to the box body through the connecting piece, improves the integration of the system, reduces the number of parts, reduces the process link, and makes the battery package assembly more convenient.

[0019] 4. Convenient multi-scene carrying; the utility model discloses the outer box includes the upper cover and the box body, and the handle convenient to carry is set up on the upper cover and the box body, is applicable to multi-scene use, uses the upper cover handle to carry the battery package in the warehouse transportation process, is taken out from the battery package storage cabinet in actual use, and the box body side handle is convenient to drag. DRAWINGS

[0020] Fig. 1 It is the appearance structure schematic diagram of the upper cover air cooling heat dissipation battery package in the embodiment of the utility model.

[0021] Fig. 2 It is the whole structure explosion drawing of the upper cover air cooling heat dissipation battery package in the embodiment of the utility model.

[0022] Fig. 3 It is the battery module explosion drawing of the upper cover air cooling heat dissipation battery package in the embodiment of the utility model.

[0023] In the drawing: 1 - box body, 2 - upper cover, 3 - BDC module, 4 - battery module, 11 - box handle, 12 - screw, 21 - discharge port, 22 - charging port, 23 - upper cover handle, 24 - fan assembly, 25 - upper cover heat dissipation hole, 26 - 4G module, 31 - radiator, 32 - PCBA board, 41 - battery cell partition, 42 - battery pack shell, 43 - battery cell, 431 - copper bar, 432 - pressing strip. PREFERRED EMBODIMENT

[0024] In order to more specifically describe the utility model, the technical scheme of the utility model is explained in detail below in combination with the drawings and specific embodiments.

[0025] For example, Figs. 1-3As shown, the utility model discloses upper cover air -cooling heat dissipation battery package structure includes the outer box, and the outer box contains the upper cover 2 of assembly BDC module 3 and the box body 1 of assembly battery module 4, the box body 1 is equipped with the box handle 11 for plane (ground) to transport, and horizontal direction carries battery package more convenient. The upper cover is equipped with the discharge port 21 of external power car, the charging port 22 of external charging machine, the upper cover handle 23 and fan assembly 24. Fan assembly 24 is by fan upper cover and fan, and fan assembly 24 is fixed on the upper cover 2 through screw and fan upper cover, provides strong heat dissipation effect for the inside of battery package, and can directly replace fan assembly 24 through directly disassembling fan upper cover and screw. The upper cover handle 23 is convenient for battery package multi-scene carrying, and can be used in combination with the box handle 11 during carrying process, and the battery package is inclined and lifted, and carrying is convenient.

[0026] As Fig. 1 As shown, in a preferred embodiment, the surface of the upper cover 2 is provided with the discharge port 21, and the charging port 22 is arranged beside, and the two are evenly distributed side by side, and are both provided with waterproof design. The surface of the upper cover 2 is provided with two symmetrical handles 23. The side of the upper cover 2 is arranged with the upper cover heat dissipation hole 25 for the heat dissipation of the battery module 4 and the BDC module 3 in the inside of the battery package box body to the outside, and the upper cover heat dissipation hole 25 is arranged at the position of the horizontal direction fan assembly 24, that is, to ensure that the upper cover 2 provides sufficient heat dissipation space for the fan assembly 24, and also makes the position of the upper cover 2 avoid the upper cover surface being too hot after the battery package works, and reduces the influence of the temperature of the battery package on the use of the handle during the carrying process.

[0027] In a preferred embodiment, the battery package is provided with the 4G module 26, the 4G module 26 is fixed to the upper cover 2 through screw, and a sealing strip is arranged between the shell of the 4G module 26 and the contact surface of the upper cover 2 to realize sealing, so that the battery package structure meets the IP65 waterproof level.

[0028] In a preferred embodiment, the edges of the box body 1 and the upper cover 2 are connected through screw 12, to make the connection of the upper cover 2 and the box body 1 uniform in stress, the connection holes are uniformly distributed, and sealing glue is used to reinforce the edges to realize sealing, so that the upper cover air -cooling heat dissipation battery package structure realizes the IP65 level waterproof effect. One box handle 11 is arranged on the side of the box body 1, the folding direction of the box handle 11 is the same as that of the upper cover handle far away from the position, so that the two handles can be used simultaneously to lift the battery package up and down.

[0029] As Fig. 3As shown, in a preferred embodiment, the battery module 4 includes a battery pack housing 42 and a plurality of battery cells 43 in the housing. The battery pack structure in this embodiment uses a plurality of square aluminum shell battery cells 43, a plurality of arrayed battery cells 43 are connected in series and parallel using copper bars 431, and a plurality of square aluminum shell hard-pack battery cells 43 are separated by cell separators 41. When arranged and installed in close contact with each other, insulation between adjacent battery cells 43 can be effectively achieved, thereby avoiding the influence of internal leakage in the battery cell block on the safety performance of the battery module 4. The plurality of square aluminum shell hard-pack battery cells 43 are provided with a pressing strip 432 connected to the box 1 by screws to achieve a fixing effect. To protect the battery module 4 from being affected by handling, shock-absorbing foam is provided between the side of the battery pack housing 42 and the inner side of the box 1, and shock-absorbing foam is provided at the bottom of the battery pack housing 42 to achieve a shock-absorbing effect.

[0030] As shown, Fig. 2 The BDC module 3 includes a heat sink 31 and a PCBA board 32. Since the PCBA board 32 has more power components than the DC-DC module, it generates more heat and requires higher heat dissipation. Therefore, the heat dissipation design needs to be highlighted. The upper cover fan can provide good heat dissipation conditions for the BDC module 3 to avoid overheating inside the battery pack. The BDC module 3 is fixed to the back of the upper cover 2 using cross-head screws.

[0031] The heat sink 31 of the BDC module 3 is installed and fixed to the upper cover 2 by a connecting member (screw). The heat sink 31 and the PCBA board 32 are connected by a copper column. A sealing strip is provided between the upper cover 2 and the heat sink 31. In the installed state, the sealing strip is in a compressed state. The heat sink is attached to the upper surface of the PCBA board 32, so that the PCBA board 32 can effectively dissipate heat through the heat sink 31 when it is working.

[0032] The heat sink 31 dissipates heat from the key power components on the PCBA board 32 to the outside through the upper cover vent and the air cooling conditions provided by the fan. The heat sink is made of aluminum alloy 6063, and the sealing strip is made of rubber. The back of the PCBA board 32 uses a mica sheet for insulation. The sealing strip isolates the BDC module 3 from the outside to achieve sealing, so that the upper cover air-cooled battery pack structure can achieve IP65 level waterproof effect.

[0033] The BDC module 3 effectively monitors the charging and discharging of the battery module 4. The battery module 4 also connects to the battery temperature and voltage sampling interface of the BDC module 3 to detect battery voltage, temperature, and current, and to protect. The BDC module 3 supports 4G communication, uploads battery information to the background, facilitates management and monitoring, supports GPS positioning, and can obtain positioning data in real time.

[0034] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, the battery module 4 can also be directly fixed to the box 1 by filling glue without using the pressing strip and screws, and the shock-absorbing foam for shock absorption between the battery module 4 and the box 1 can be omitted.

[0035] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, the battery module 4 can also use one or more hard-pack battery cells 43 of different shapes or battery cells 43 of different sizes that conform to the battery pack structure.

[0036] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, a metal sheet partition can also be arranged between the BDC module 3 and the battery module 4 to achieve insulation by other forms of design.

[0037] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, the box 1 can also be square or have four equal walls, and the design of the box 1 can be changed according to the implementation of the battery module 4.

[0038] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, the 4G module 26 can also be cancelled, and the battery pack does not use the 4G communication function.

[0039] In other embodiments of the battery pack structure with the upper cover air-cooled heat dissipation, the box handle 11 can be arranged on the outer wall in any direction of the side surface, and there can be one or multiple handles. The upper cover handle 23 can also be arranged in an asymmetric form or only one handle can be designed. The carrying is completely considered in combination with the box handle 11 on the side surface of the outer box, so as to save the cost.

[0040] The above description of the embodiments is for the convenience of the ordinary skilled in the art to understand and apply the present application. It is obvious that those skilled in the art can easily make various modifications to the above embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present application is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art based on the disclosure of the present application should be within the scope of protection of the present application.

Claims

1. A top-cover air-cooled heat dissipation battery pack structure, comprising an outer casing, a BDC module, and a battery module, wherein the battery module and the BDC module are both installed and fixed inside the outer casing, and the BDC module is connected to the battery module for monitoring and controlling the operation of the battery module, characterized in that: The outer casing includes a top cover and a casing body. The top cover is detachably installed and fixed on the top of the casing body. The surface of the top cover is provided with a charging port, a discharging port, a fan assembly, and a handle. The side is provided with heat dissipation holes for the battery module and BDC module inside the casing to dissipate heat outward. The BDC module is fixed inside the top cover and located between the battery module and the top cover.

2. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The side of the box is equipped with a handle for easy handling on a flat surface, making it more convenient to lift the battery pack horizontally on the ground.

3. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The heat dissipation holes are located on the same horizontal plane as the fan assembly, which ensures that the top cover provides sufficient space for the fan assembly to dissipate heat, and also prevents the surface of the top cover from getting too hot after the battery pack is working, thus reducing the impact of the battery pack temperature on the handle during transportation.

4. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The top cover is connected to the edge of the casing with screws and sealed with sealant, so that the battery pack structure achieves an IP65 waterproof rating.

5. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The battery module includes a battery housing and battery cells inside the housing. The battery cells are connected in series and parallel using copper busbars, and adjacent battery cells are separated by partitions. The battery module is fixed to the housing by potting glue, or by installing and fixing it to the housing with pressure strips and screws. Shock-absorbing foam is provided at the bottom of the battery housing and between the battery housing and the housing to achieve a shock absorption effect.

6. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The BDC module includes a PCBA board and a heat sink. One side of the heat sink is fixed to the inside of the top cover by a connector, and the other side is connected and fixed to the PCBA board by a connector. The heat sink is close to the upper surface of the PCBA board and faces the fan assembly, and can dissipate the heat of the key power devices on the PCBA board to the outside through the heat dissipation holes and the air cooling provided by the fan assembly.

7. The top cover air-cooled heat dissipation battery pack structure according to claim 6, characterized in that: The lower surface of the PCBA board is made of Mylar sheet, which serves to insulate it from the battery module; a sealing strip is provided between the heat sink and the top cover, which is in a compressed state during installation, so that the battery pack structure is sealed to achieve an IP65 waterproof rating.

8. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The fan assembly consists of a fan cover and a fan. The fan is fixed to the upper cover by screws and the fan cover, so that the fan can be removed from the upper cover by removing the fan cover, making it convenient and easy to disassemble.

9. The top cover air-cooled heat dissipation battery pack structure according to claim 1, characterized in that: The battery pack structure is also equipped with a 4G module, which is fixedly embedded in the top cover by screws. A sealing strip is provided between the outer shell of the 4G module and the contact surface of the top cover, so that the battery pack structure achieves an IP65 waterproof rating.

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