The power lithium-ion battery module
Technical field
The utility model belongs to the vehicle power field of power supplies, relates in particular to a kind of power lithium-ion battery module.
Background technology
At present, in the electrokinetic cell that domestic electric motor car industry is used, some is the cell product, the user take battery need oneself to assemble, supporting, also have some battery products in groups, also claim lithium ionic cell module, can directly buy use.Yet in existing lithium ionic cell module, owing to adopt bolt to connect battery pole piece usually, contact resistance between pole piece is increased, thereby make the pole piece caloric value bigger, and the bolt ease of connection causes the loosening of bolt or comes off under vibration condition, influences the operate as normal of battery pack.Therefore, this just needs the lithium ionic cell module that a kind of caloric value is low and can keep pole piece firmly to connect.
The utility model content
The purpose of this utility model is to overcome the shortcoming that above-mentioned lithium ionic cell module exists, and the lithium ionic cell module that a kind of caloric value is low and keep battery pole piece firmly to connect is provided.
Above-mentioned purpose realizes by following technical proposal:
According to an aspect of the present utility model, a kind of power lithium-ion battery module is provided, comprising:
Battery pack 8;
Casing; And
Battery management system;
Battery pole ear in the wherein said battery pack 8 adopts the ultra-sonic welded mode to connect.
According to another aspect of the present utility model, described battery pack 8 is for to be in series by 10 or 13 power lithium-ion batteries; Described casing comprises shell 2, top board 7, loam cake 3, side cover 4, middle baffle plate 9, plate 12 and side plate 10; Described battery management system comprises voltage temperature acquisition module 11, electric interfaces 1 and communication interface 6.
According to another aspect of the present utility model, also comprise cooling system, be used for the heat in the described module is discharged, wherein said cooling system comprises air inlet 14, air channel 18, air outlet 15 and fan 5.Preferably, described cooling system also comprises dirt filtrating screen, and it is installed in the inboard of described air inlet 14.
Compare with existing lithium ionic cell module, advantage of the present utility model is:
1. reduce the contact resistance between battery pole piece, reduce caloric value, improve the specific energy of battery;
2. make the connection between battery pole piece firm;
3. prolong the working life of battery.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the outside drawing of the lithium ionic cell module of the utility model embodiment;
Fig. 2 is the structure chart of the lithium ionic cell module of the utility model embodiment;
Fig. 3 is the side plate schematic diagram of the lithium ionic cell module of the utility model embodiment;
Fig. 4 is middle baffle plate, the plate schematic diagram of the lithium ionic cell module of the utility model embodiment;
Fig. 5 is the top board schematic diagram of the lithium ionic cell module of the utility model embodiment;
Fig. 6 is the cooling system schematic diagram of the lithium ionic cell module of the utility model embodiment;
Fig. 7 is the interior electrical diagram of lithium ionic cell module of the utility model embodiment;
Fig. 8 is the circuit diagram when the lithium ionic cell module series connection of the utility model embodiment is used.
The Reference numeral list
1-electric interfaces; 2-shell; 3-loam cake; 4-side cover; 5-fan; 6-communication interface; 7-top board; 8-battery pack; 9-middle baffle plate; 10-side plate; 11-voltage temperature acquisition module; 12-plate; 13-fixed strip; 14-air inlet; 15-air outlet; 16-wire casing; 17-groove; 18-air channel.
Embodiment
[embodiment 1]:
Fig. 1 is the lithium ionic cell module outside drawing of the utility model embodiment.Electric interfaces 1 is positioned on the loam cake 3; The installed inside of side cover 4 has fan 5, and described fan and communication interface 6 are by being bolted on the side cover 4.
Fig. 2 is the lithium ionic cell module structure chart of the utility model embodiment.For Understanding Module structure better, its structure is described below in conjunction with the manufacturing process of lithium ionic cell module.At first adopt welding manners to be connected with shell 2 side plate 10, middle baffle plate 9 and plate 12 all adopt the fixed strip 13 on inserting mode and described shell and the side plate peg graft mutually (shown in Fig. 3,4); Then, battery pack 8 is put into casing; By bolt voltage temperature acquisition module 11 is fixed to the front (as shown in Figure 3) of described side plate, notices that the interface direction of acquisition module is inwardly wanted; After installing described battery pack and voltage temperature acquisition module, battery pole ear is passed from the slit of top board 7, as shown in Figure 5, bend adjacent battery pole ear and be pressed onto mutually in the groove 17 on the described top board, re-using the lug that ultrasonic bond will press mutually welds, line is gathered in welding on lug then, finally gathers line and is connected on the described voltage temperature acquisition module by wire casing 16; At last described top board is fixed to above the described battery pack, described top board is a nylon sheet, in order to the support fixation lug, with bolt described loam cake and side cover is installed then.
Adopt the ultra-sonic welded mode that the battery pole ear in the battery pack 8 is coupled together to realize the battery series connection, can reduce the contact resistance of battery effectively, thereby reduce the caloric value of pole piece, and it can improve the steadiness of battery pack under the vibration condition.
In order to reduce the heat of lithium ionic cell module better, alternatively, the utility model also adopts cooling system, and this cooling system comprises air inlet 14, air channel 18, air outlet 15 and fan 5; Described air inlet is positioned at the top of shell left side; Described air outlet is positioned at the top of described side plate, and the two is formed by row's aperture.Preferably, described cooling system can also comprise one deck dirt filtrating screen, is placed on the inboard of described air inlet.Exemplary air-flow direction in module when as shown in Figure 6, direction shown in the dotted line is cooling system work.As can be seen from the figure, air channel 18 is interior spaces of the relative closure that is made of the left side of described shell, side plate, plate (two), top board, middle baffle plate and battery pack.When cooling system was worked, the running of fan made and forms negative pressure in the module, and cold air enters battery module from described air inlet, via described air channel and air outlet, finally discharges module by fan, takes away the heat of battery pack.This trapezoidal air channel structure can make air contact battery pack more in large area, helps the heat of cell body is taken away.
Fig. 7 is the interior electrical diagram of lithium ionic cell module of the utility model embodiment.As shown in the figure, the temperature acquisition line of the temperature sensor 19 of 11 voltage acquisition lines and DS18B20 type is connected on the voltage temperature acquisition module 11 jointly; Two communication interfaces 6 are drawn from described voltage temperature acquisition module, and described communication interface uses the aviation plug (communication 4 cores, fan 2 cores) of 6 cores.
Fig. 8 is the circuit diagram of the lithium ionic cell module series connection of the utility model embodiment when using.As shown in the figure, realize the series connection of module by connecting electric interfaces 1 and communication interface 6.Electric interfaces uses cable to link to each other, and communication interface uses the connection of double end to link to each other.Watch-dog can demonstrate voltage, electric current and the battery capacity (SOC) of battery.Charge port is that charger matching battery management system can reach charging effect preferably with mouth with the discharge mouth.
Consider intensity, weight and cost; described shell and side cover preferably adopt mild steel to make; be responsible for support and protection to the entire lithium ion battery module; described plate, side plate, middle baffle plate and loam cake all adopt PVC (polyvinyl chloride) plate to make; yet for it should be appreciated by those skilled in the art, other materials that can satisfy intensity, weight and cost requirement all can use.In addition, it is further to be understood that, although described battery pack is made up of 10 flat type lithium ion batteries in aluminum plastic film flexible package side, the specification of battery pack is 50Ah, 38V, yet also can use the power lithium-ion battery group of other known different sizes that are made of 10 or 13 power lithium-ion batteries.
Although made specific descriptions for the utility model with reference to the above embodiments, but for the person of ordinary skill of the art, should be appreciated that and can make amendment or improve based on the disclosed content of the utility model, and these modifications and improving all within spirit and scope of the present utility model.