CN216928687U

CN216928687U - 48V lithium ion battery system

Info

Publication number: CN216928687U
Application number: CN202220355778.4U
Authority: CN
Inventors: 徐礼新
Original assignee: Wuhu Yunhan Power New Energy Technology Co ltd
Current assignee: Wuhu Yunhan Power New Energy Technology Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-08
Anticipated expiration: 2032-02-22

Abstract

The utility model discloses a 48V lithium ion battery system which comprises a BMS, a box body assembly, a module assembly arranged in the box body assembly and a fire extinguishing device which is arranged in the box body assembly and used for spraying aerogel, wherein the BMS is arranged on the box body assembly and is positioned outside the box body assembly. The 48V lithium ion battery system is portable, can meet various entertainment places such as household, vehicle-mounted and the like, and is convenient and quick; BMS is external can satisfy quick replacement and information reading, reduces the maintenance cost, and secondly battery system is inside to be provided with extinguishing device, guarantees that the battery package can not cause personnel, loss of property when meetting the condition of a fire, improves the security.

Description

48V lithium ion battery system

Technical Field

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a 48V lithium ion battery system.

Background

With the further improvement of the national fuel consumption and emission standards of vehicles, energy conservation and emission reduction become the subjects which are required to be faced by the automobile enterprises. The 48V system has the characteristics of low investment and obvious energy conservation and emission reduction, can obviously improve the power of the vehicle-mounted power supply, can be quickly applied and obtain a certain energy-saving effect due to the advantage of relatively low technical threshold, and is one of short-term solutions for meeting increasingly severe oil consumption regulations. Energy and environmental protection are major problems in a global sense, and the low-carbon development of automobiles as energy consumers is widely concerned by people. In this context, 48V systems are receiving increasing attention as an effective energy saving technology. The 48V system has two layers, namely a vehicle electric system with the voltage of 48V, and the other layer of the system is a mild hybrid power system designed and developed by people based on the electric system, wherein the 48V system can be carried on a traditional fuel vehicle for use, the technical cost of the system is only 30% of that of a high-voltage hybrid electric technology, 70% of performance of the high-voltage hybrid electric vehicle can be achieved, and the fuel saving rate is improved by 10% -15% or even higher.

With the subsidy of new energy accelerating the grade back, the 48V battery system is the first to solve the power supply problem that the 12V voltage system can not solve. In addition, the 48V battery system can achieve obvious oil-saving effect on the optimization of the engine under the working conditions of starting and stopping, starting, braking and the like. The degree of electrification of automobiles is still continuously improved, and the upgrading of automobile electrical systems is concerned by the automobile electrical industry again. Due to the rapid improvement of the electrification degree of the vehicle, various high-power electronic devices are continuously integrated, such as electronic equipment of a start-stop system, an electronic power steering system, an active suspension system, a higher-power air conditioning system, a driving auxiliary system, a long-short distance radar and the like, and a high-power motor of a hybrid power system. In addition, in order to reduce fuel consumption and emissions, various electric drive and intelligent control systems will replace conventional systems, such as water pump drive systems, mechanical drive systems, fans, compressors, and the like. These changes all require automotive electrical systems that can meet higher power requirements, so 48V battery systems have come to the fore, and the main characteristics of such systems can be summarized as corresponding speed, light weight, high voltage platform, and can be applied to increasingly numerous vehicle-mounted electrical systems. Specifically, the energy-saving device has the advantage that a certain energy-saving effect can be rapidly achieved with low total investment cost.

Among the current 48V lithium ion battery system, BMS is for built-in the inside of box assembly, and built-in BMS has restricted the narrow and small space of battery package, is unfavorable for arranging of the inside electrical part of battery package and module, has reduced the electric quantity demand of whole package, moreover in the routine maintenance in-process, just can arrange and change BMS software and hardware after need unpacking, needs more time, and after-sale maintenance cost also increases.

In the existing 48V lithium ion battery system, an independent metal plate box body or a plastic outer shell is arranged outside a BDU (brain-based battery unit) design, the cost of a battery pack is increased, and then the weight and the space of the whole battery pack are limited, so that the energy density of the battery pack is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a 48V lithium ion battery system, aiming at improving the safety and reducing the maintenance cost.

In order to achieve the purpose, the utility model adopts the technical scheme that: 48V lithium ion battery system, including BMS, box assembly, set up in the inside module assembly of box assembly and set up in the inside extinguishing device who just is used for spraying the aerogel of box assembly, BMS sets up on the box assembly and is located the outside of box assembly.

The box assembly includes casing assembly and last casing assembly down, the BMS sets up on last casing assembly, extinguishing device pastes on the inner wall of casing assembly down, the inside of casing assembly is installed down to the module assembly.

Go up the casing assembly and include casing body and set up on last casing body and be used for hiding the shield of the last casing via hole that sets up on the casing body, the BMS sets up on last casing body.

And a transfer handle is arranged on the lower shell assembly.

The transfer handles are arranged in 4 numbers.

And a charging and discharging port and a communication interface are arranged on the plug-in panel of the lower shell assembly.

The BDU assembly is arranged in the box body assembly and adopts a shell-free design, and the BDU assembly comprises a BDU bottom plate, and a fuse, a main positive relay, a pre-charging relay, a Hall sensor, an insulator and a pre-charging resistor which are arranged on the BDU bottom plate.

The 48V lithium ion battery system is portable, can meet various entertainment places such as household, vehicle-mounted and the like, and is convenient and quick; BMS is external can satisfy quick replacement and information reading, reduces the maintenance cost, and secondly the inside extinguishing device that is provided with of battery system guarantees that the battery package can not cause personnel, loss of property when meetting the condition of a fire, improves the security.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic diagram of a 48V lithium ion battery system of the present invention;

FIG. 2 is an exploded schematic view of a 48V lithium ion battery system of the present invention;

FIG. 3 is a schematic diagram of the module structure of a 48V lithium ion battery system of the present invention;

FIG. 4 is a schematic diagram of a BDU structure of a 48V lithium ion battery system of the present invention;

FIG. 5 is a schematic structural diagram of a fire extinguishing apparatus of a 48V lithium ion battery system according to the utility model;

FIG. 6 is a schematic diagram of a low voltage connection harness configuration of a 48V lithium ion battery system of the present invention;

labeled as: 1. BMS (battery management system); 2. a box body assembly; 3. a nameplate; 4. charging and discharging the positive electrode of the socket; 5. charging and discharging a cathode of the socket; 6. a low voltage communication port; 7. a dust cover; 8. a transfer handle; 9. soaking cotton with a dustproof cover; 10. a wire harness via hole; 11. connecting copper bars at high voltage; 12. a fire extinguishing device; 13. BDU assembly (high voltage box); 14. a lower housing assembly; 15. module protection foam; 16. a module assembly; 17. an upper housing body; 18. a module voltage acquisition point; 19. a module tab; 20. an electric core; 21. a module fixing hole; 22. the battery cell is connected with the pole piece; 23. a fuse; 24. a BDU backplane; 25. a main positive relay; 26. a pre-charging relay; 27. a Hall sensor; 28. an insulator; 29. pre-charging a resistor; 30. the fire extinguishing device controls the wire harness; 31. 3M gum; 32. a fire suppression device system; 33. a fire extinguishing device jet orifice; 34. a low voltage master control harness assembly; 35. the module collects a harness assembly.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 6, the utility model provides a 48V lithium ion battery system, which comprises a BMS1, a box assembly, a fire extinguishing apparatus 12 arranged inside the box assembly and used for spraying aerogel, and a module assembly 16 arranged inside the box assembly, a low-voltage main control harness assembly 34, a module collection harness assembly 35, a high-voltage connecting copper bar 11, module protection foam 15 and a BMS13, wherein a BMS1 is arranged on the box assembly and is positioned outside the box assembly.

Specifically, as shown in fig. 2, the case assembly includes a lower case assembly 14 and an upper case assembly, the BMS1 is provided on the upper case assembly, the fire extinguishing device 12 is adhered to the inner wall of the lower case assembly 14, and the module assembly 16 is installed inside the lower case assembly 14. Go up the casing assembly and include last casing body 17 and set up on last casing body 17 and be used for hiding the shield 7 of the last casing via hole that sets up on last casing body 17, BMS1 sets up on last casing body 17. Set up on the lower casing assembly 14 and transport handle 8, transport handle 8 and set up 4 altogether, 4 transport handle 8 settings are on two relative outer wall of casing assembly 14 down.

As shown in fig. 2, when assembled, one of the lower housing assemblies 14 is removed and the module protective foam 15 is placed in the lower housing assembly 14. The module assembly 16 is taken out and placed in the lower housing assembly 14, and the module assembly 16 has a reserved fixing hole 21 which can be matched with a corresponding beam fixing hole of the lower housing assembly 14. And taking out the positive electrode 4 of the charge and discharge socket, the negative electrode 5 of the charge and discharge socket and the low-voltage communication wiring harness assembly 34, and respectively assembling the positive electrode, the negative electrode and the low-voltage communication wiring harness assembly to the corresponding panel silk-screen printing positions of the lower shell assembly 14.

The BDU assembly 13 is split-packaged off line as shown in fig. 4, the fuse 23, the BDU bottom plate 24, the main and positive relay 25, the pre-charging relay 26, the hall sensor 27, the insulator 28 and the pre-charging resistor 29 are taken out during assembly, the BDU bottom plate 24 is a carrier for all the components, bolts or nuts are reserved for all the components to fix, the fuse 23, the main and positive relay 25, the pre-charging relay 26, the hall sensor 27, the insulator 28 and the pre-charging resistor 29 are sequentially assembled on the BDU bottom plate 24 according to the illustration in fig. 4, the BDU split-packaging off line is completed, and the assembly is completed as shown in fig. 4. The BDU base plate 24 is finally installed within the interior cavity of the lower housing assembly 14.

The fire extinguishing device 12 is separately assembled as shown in fig. 5, the fire extinguishing device body 32 is taken out, the 3M back glue 31 is taken out, the protective films on two sides of the back glue 31 are torn, and one side of the protective films is bonded on the surface of the fire extinguishing device body 32.

As shown in fig. 4 to 5, the fire extinguishing device 12 and the BDU assembly 13 are sequentially installed in the lower housing assembly 14, and the BDU base plate 24 is reserved with installation holes corresponding to the installation holes of the lower housing assembly 14. And tearing the 3M back adhesive on the back of the fire extinguishing device 12, and bonding the fire extinguishing device 12 on the side sheet metal of the lower shell assembly 14. Then a sleeve of high-voltage connecting copper bar 11 is taken out, and the module positive and negative electrode lug 19, the BDU assembly 13, the charge and discharge plug-in anode 4 and the charge and discharge plug-in cathode 5 are connected in series by the copper bar in sequence to complete high-voltage loop connection. Then a set of low voltage communication harness 34 and module collection harness 35 are taken out, one end of the module collection harness 35 is a voltage collection end and is respectively connected to the voltage collection point 18 at the module assembly 16.

The low voltage communication harness 34 is then removed and the communication port 6 is secured to the lower housing assembly 14 as shown in fig. 1. Then one end of the low-voltage acquisition wiring harness 34 is used for the main control relay 25, the Hall control 27, the pre-charging relay control 26 and the fire extinguishing device control 13 to be correspondingly connected with the insulation and total pressure detection, and the connection of the low-voltage main control wiring harness 34 is completed. Then, the upper housing body 17 is taken out, and the opposite plug ends of the low-voltage main control wiring harness 34 and the module collection wiring harness 35, which are connected with the BMS1, are led out through the wiring harness through holes 10 of the upper housing body 17. And taking out the BMS1, installing the BMS1 on the upper shell body 17 at a reserved installation position, connecting the control ports of the low-voltage main control wiring harness 34 and the module collection wiring harness 35 to the BMS1, and completing the connection of all the module collection and low-voltage control wiring harnesses. The dust cover 7 and the dust cover foam 9 are taken out, the dust cover foam is mounted on the inner side of the dust cover 7, the dust cover foam 9 is special-shaped, and the wrapping can be completed through a wire harness. And (4) taking out the assembled dustproof cover 7, installing the dustproof cover at the wire harness through hole 10, and completing the assembly of the 48V battery system, wherein the assembled dustproof cover is shown in figure 1.

The 48V lithium ion battery system with the structure has the following advantages:

first, the BMS adopts externally, and traditional battery package adopts the BMS built-in usually, and built-in BMS has restricted the narrow and small space of battery package, is unfavorable for arranging of inside electrical part of battery package and module, has reduced the electric quantity demand of whole package. Secondly, the BMS is externally arranged, so that space is continuously saved in the battery pack, and secondly, due to the fact that the BMS is prone to faults, in the daily maintenance process, software and hardware of the BMS can be continuously checked and replaced without unpacking, so that time and after-sales maintenance cost are saved;

and secondly, the low-voltage wire harness and the module collecting wire harness directly penetrate out of the upper shell, and the dustproof sealing protective cover is arranged above the low-voltage wire harness and the module collecting wire harness. The wire harness directly passes through the upper shell, a set of plug wire harness end is not independently configured, so that the cost can be saved, and the wire harness is not subjected to secondary switching, so that the battery pack installation accident caused by poor wire harness outgoing contact is avoided;

thirdly, the battery pack is provided with a miniature fire extinguishing device 12, which works according to the following principle: on fire suppression unit 12, there is fire suppression unit control harness 30, which is connected to low voltage main control harness 34, controlled by BMS1, and is powered by battery pack internal module assembly 16 without interruption. The specific implementation mode is as follows: inside smog, the integrated sol of putting out a fire of being provided with of extinguishing device 12, the battery package appears the condition of a fire and the short circuit has smog to appear, triggers smog, the temperature sensor in the extinguishing device 12, and smog volume, condition of a fire temperature contrast with BMS1 preset value in the package, and when the smog volume, package inside temperature exceeded BMS1 set value, the extinguishing device triggered. The aerogel is sprayed through the spraying openings on the fire extinguishing device 12, so that the fire extinguishing effect is achieved.

Fourth, the BDU gathers no shell design, and there is independent panel beating box or plastics shell body traditional BDU design outside, and this design has not only increased the battery package cost, and secondly the weight and the space of whole package all receive the restriction, have influenced the energy density of battery package. This utility model discloses a no shell design, BDU bottom only adopt the one deck 2mm panel beating face, and the thickness of BDU bottom plate also is 2mm, and on this panel beating bottom plate was directly installed to the inside components and parts of BDU, practical space in this scheme not only can reducing the guarantor, and manufacturing cost and follow-up investigation, repair all traditional BDU before have greatly improved.

The utility model is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the utility model are not limited in this respect. Any insubstantial improvements over the methods and technical solutions of the present invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1.48V lithium ion battery system, include BMS, box assembly and set up in the inside module assembly of box assembly, its characterized in that: still including set up in the inside extinguishing device who just is used for spraying the aerogel of box assembly, the BMS sets up on the box assembly and is located the outside of box assembly.

2. The 48V lithium ion battery system of claim 1, wherein: the box assembly includes casing assembly and last casing assembly down, the BMS sets up on last casing assembly, extinguishing device pastes under on casing assembly's the inner wall, the inside of casing assembly is under in the module assembly installation.

3. The 48V lithium ion battery system of claim 2, wherein: go up the casing assembly and include casing body and set up on last casing body and be used for hiding the shield of the last casing via hole that sets up on last casing body, the BMS sets up on last casing body.

4. The 48V lithium ion battery system of claim 2, wherein: and a transfer handle is arranged on the lower shell assembly.

5. The 48V lithium ion battery system of claim 4, wherein: the transfer handles are arranged in 4 in total.

6. The 48V lithium ion battery system of claim 2, wherein: and a charging and discharging port and a communication interface are arranged on the plug-in panel of the lower shell assembly.

7. The 48V lithium ion battery system of any of claims 1 to 6, wherein: the BDU assembly is arranged in the box body assembly and adopts a shell-free design, and the BDU assembly comprises a BDU bottom plate, and a fuse, a main positive relay, a pre-charging relay, a Hall sensor, an insulator and a pre-charging resistor which are arranged on the BDU bottom plate.