CN217848185U - Power battery system of new energy vehicle and vehicle - Google Patents
Power battery system of new energy vehicle and vehicle Download PDFInfo
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- CN217848185U CN217848185U CN202220528872.5U CN202220528872U CN217848185U CN 217848185 U CN217848185 U CN 217848185U CN 202220528872 U CN202220528872 U CN 202220528872U CN 217848185 U CN217848185 U CN 217848185U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a new energy vehicle's power battery system and vehicle, power battery system include the battery package, have multiunit high pressure lithium battery module, at least a set of low pressure lithium battery module in the battery package and with at least one first zone of heating that at least a set of low pressure lithium battery module corresponds, every first zone of heating heats the low pressure lithium battery module that corresponds controlledly. The utility model discloses can ensure that low pressure lithium cell group also can keep normal performance under low temperature environment.
Description
Technical Field
The utility model relates to a vehicle field especially relates to a new forms of energy vehicle's power battery system and vehicle.
Background
The automobile controller generally supplies power for 12V low voltage, and a power supply system for the automobile controller for supplying power for the automobile controller for low voltage mainly comprises a lead-acid battery, a DC-DC voltage regulator and the like. The low-voltage power supply system of the existing electric automobile generally adopts a lead-acid battery for power supply. With the development of the internet of vehicles, vehicle-mounted equipment on a vehicle effectively utilizes all vehicle dynamic information in an information network platform through a wireless communication technology, and provides different functional services in the running process of the vehicle. Most controllers of the whole automobile need to be frequently awakened due to the internet of vehicles, and lead-acid batteries with low capacity are fed when the automobile is parked for a long time, so that the automobile cannot be normally started, which is a ubiquitous problem in the new energy automobile industry.
In the prior art, there is a technical scheme of replacing a lead-acid battery in a low-voltage power supply system of a vehicle with a lithium battery, however, since the lithium battery has poor performance under low temperature conditions, the technical scheme has poor practicability under low temperature conditions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is unable the starting of vehicle that the low pressure power supply system feed of avoiding new energy automobile leads to.
The utility model discloses a further aim is to improve the performance of lithium cell at low temperature among the new energy automobile low pressure power supply system.
Particularly, the utility model discloses a power battery system of new forms of energy vehicle, including the battery package, have multiunit high pressure lithium cell module, at least a set of low pressure lithium cell module in the battery package and with at least one first zone of heating that at least a set of low pressure lithium cell module corresponds, every the zone of heating is controlled ground and is heated the low pressure lithium cell module that corresponds.
Furthermore, the heating layer is a heating film, and the low-voltage lithium battery module is coated by the heating film.
Further, the low-voltage lithium battery module comprises a plurality of lithium iron phosphate batteries.
Further, still include first thermal management unit, with the zone of heating is connected to control the start-stop and the temperature regulation of zone of heating.
The battery pack is connected with the first heat management unit, and the second heat management unit is connected with the battery pack to regulate the temperature of the battery pack.
Particularly, the utility model also discloses a power battery system of new energy vehicle, be in including battery package and setting the outer first low pressure lithium battery module of battery package, high-pressure lithium battery module and second low pressure lithium battery module have in the battery package.
Furthermore, the first low-voltage lithium battery module and/or the second low-voltage lithium battery module correspond to a second heating layer, and the second heating layer is used for heating the corresponding low-voltage lithium battery module in a controlled manner.
Furthermore, the heating layer is a heating film, and the first low-voltage lithium battery module and/or the second low-voltage lithium battery module are/is coated by the heating film.
Further, still include first thermal management unit, with the zone of heating is connected to control the start-stop and the temperature regulation of zone of heating.
Particularly, the utility model also discloses a vehicle, include an arbitrary new forms of energy vehicle's power battery system.
The utility model discloses in, use low pressure lithium cell module to replace lead acid battery, the vehicle is parking the back for a long time, still can normally start behind the low pressure power supply system electric quantity. Low-voltage lithium battery module compares in lead acid battery weight low, small, can alleviate whole car weight, release front cabin space, promotes to use car reliability. In order to solve the problem that low temperature performance of the low-voltage lithium battery module is low, the heating layer is used for heating the low-voltage lithium battery module, and normal performance of the low-voltage lithium battery module can be kept in a low-temperature environment.
Further, the zone of heating adopts the heating membrane, and this kind of heating membrane is convenient for arrange, can heat for every low pressure lithium battery module, improves the heating effect.
Further, the first thermal management unit and the second thermal management unit form double management of the temperature of the low-voltage lithium battery module so as to ensure that the low-voltage lithium battery module is heated in a low-temperature state.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:
FIG. 1 is a schematic block diagram of a power battery system according to one embodiment of the present invention;
FIG. 2 is a schematic circuit connection diagram of the power cell system of FIG. 1;
FIG. 3 is a line graph comparing the use of a prime power battery system according to one or more embodiments of the present disclosure with an existing power battery system;
in the figure:
1-a battery pack;
11-a high voltage lithium battery module;
12-a low voltage lithium battery module;
2-a high voltage component;
3-low pressure components;
a 4-DC-DC module;
5-an IBMS controller;
6-VCU；
7-vehicle control unit.
Detailed Description
Example 1
Fig. 1 is a schematic block diagram of a power battery system according to an embodiment of the present invention. Particularly, an embodiment of the utility model discloses a power battery system of new forms of energy vehicle, including battery package 1, have multiunit high pressure lithium cell module 11, at least a set of low pressure lithium cell module 12 and with at least one first zone of heating that at least a set of low pressure lithium cell module 12 corresponds, every in the battery package 1 the first zone of heating is controlled to heat corresponding low pressure lithium cell module 12.
The lead-acid battery is replaced by the low-voltage lithium battery module, and the vehicle can still be normally started after being parked for a long time and the electric quantity of the power battery system. Low-voltage lithium battery module compares in lead acid battery weight low, small, can alleviate whole car weight, release front cabin space, promotes to use car reliability. In order to solve the problem that the low performance of low pressure lithium battery module low temperature, still use the zone of heating to heat low pressure lithium battery module, ensure that low pressure lithium battery module also can keep normal performance under low temperature environment.
According to an embodiment of the present invention, generally, the battery PACK 1 is a product that is processed by combining an electric core, a battery protection plate, a battery connection sheet, label paper, and the like by a battery PACK process. In this embodiment, the battery pack 1 includes two kinds of electric cores, one kind is a high-voltage lithium battery module 11, the other kind is a low-voltage lithium battery module 12, and the two kinds of battery modules are integrated in the battery pack 1. Multiunit high voltage lithium battery module 11 is the rectangular array in this embodiment, and every high voltage lithium battery module 11 all includes 4 strings of ternary lithium batteries, in the battery package 1 is packed into in order to be convenient for integrate low pressure lithium battery module 12, with 11 replacements of high voltage lithium battery module in the battery package 1 for low pressure lithium battery module 12.
According to the utility model discloses an embodiment, high pressure lithium battery module 11 is the original battery module in the battery package 1, generally, considers the cost and the security of vehicle, and high pressure lithium battery module 11 adopts the ternary lithium cell of the ternary cathode material preparation of compriseing nickel, cobalt, manganese, and its capacity is higher, and the voltage of high pressure lithium battery module 11 output generally is 100 ~ 400V, and its output current is 100A at least. The high voltage lithium battery module 11 is connected to the high voltage part 2, such as a motor, a compressor and a heater of a vehicle, through a certain power conversion device (e.g., a motor controller MCU).
According to the utility model discloses an embodiment, low pressure lithium cell module 12 includes a set of or multiunit lithium iron phosphate battery, lithium iron phosphateThe battery is a battery using lithium iron phosphate (LiFePO) 4 ) The lithium ion battery using carbon as a cathode material and carbon as an anode material has a single rated voltage of 3.2V and a charge cut-off voltage of 3.6V-3.65V. In order to meet the working requirements of low-voltage components 3 (such as an automobile controller with the working voltage of 12V) in a vehicle, a plurality of lithium iron phosphate batteries are connected in series to obtain a target voltage, and the plurality of lithium iron phosphate batteries are connected in parallel to increase the capacity. The arrangement of the lithium iron phosphate batteries can be designed according to actual needs by those skilled in the art, and details are not described herein. Compared with a lead-acid battery with the same volume, the capacity of the lithium iron phosphate battery is 3-4 times or even more than that of the lead-acid battery, and compared with a ternary battery, the lithium iron phosphate battery has higher safety.
According to an embodiment of the present invention, the heating layer is one or more layers of heating films coated outside the low voltage lithium battery module 12. In particular, considering that the lithium iron phosphate batteries are generally arranged in rows and columns, the heating film may be arranged between two adjacent rows or two adjacent columns of lithium iron phosphate batteries to heat each lithium iron phosphate battery and improve the performance thereof at low temperature. The heating film can also be directly coated outside a group of lithium iron phosphate batteries. The heating film used in the embodiment is a semitransparent polyester film capable of heating after being electrified, is made by processing and hot-pressing conductive special printing ink and metal current carrying strips between insulating polyester films, and takes an electrothermal film as a heating body to send heat into a space in a radiation mode when in work. In other embodiments the heating layer may be a heating plate or a heating resistor.
Fig. 1 is a schematic block diagram of a power battery system according to an embodiment of the present invention. FIG. 2 is a schematic circuit connection diagram of the power cell system of FIG. 1. According to the utility model discloses an embodiment, for the heating condition of control battery package 1, battery package 1 still includes temperature monitoring module, controller, DC-DC module 4, first thermal management unit and second thermal management unit, and temperature monitoring module arranges the temperature in order to monitor low pressure lithium battery module 12 around low pressure lithium battery module 12. The controller is connected the zone of heating in order to control its concrete heating condition, and the temperature monitoring module is connected in order to acquire low pressure lithium cell module 12 operating temperature to the controller, and the controller still connects battery package 1 in order to control the holistic charge-discharge of battery package 1. The DC-DC module 4 is connected with the high-voltage lithium battery module 11, the low-voltage lithium battery module 12, the controller, the VCU6 (vehicle-mounted communication device) and the vehicle control unit 7 for power supply. The first heat management unit is connected with the heating layer to control the starting and stopping of the heating layer and temperature adjustment. And the second thermal management unit is connected with the controller and the battery pack 1 so as to regulate the overall temperature of the battery pack 1. The first thermal management unit can adopt a current management chip, and the heating temperature of the heating layer is adjusted by adjusting the current; the second thermal management unit may employ a temperature regulation component of the primary battery pack. The first thermal management unit and the second thermal management unit form dual management of the temperature of the lithium battery pack 12, so as to ensure that the lithium iron phosphate battery is heated desirably in a low-temperature state. Wherein. The temperature monitoring module specifically adopts a thermistor, a bimetal strain gauge or a thermocouple. The controller is an IBMS (integrated Battery Management System) controller, the IBMS controller 5 can manage the lithium iron phosphate Battery, and is in communication with the vehicle control unit 7 through the VCU6 to control the DC-DC module 4 to charge the lithium iron phosphate Battery, and in the driving stage, the lithium iron phosphate Battery can be automatically controlled to discharge according to the driving habit, and when the new energy electric vehicle is charged, the lithium iron phosphate Battery is fully charged. Through IBMS management lithium iron phosphate battery, replace lead-acid battery, can effectively solve new forms of energy electric automobile feed problem. The lithium iron phosphate battery has more sufficient electric quantity, so that the battery pack 1 has enough time to perform voltage equalization and SOC (State of Charge) calibration, and compared with a vehicle matched with a lead-acid battery, the vehicle matched with the lithium iron phosphate battery keeps consistent in endurance, the vehicle weight is reduced, and the cost is reduced.
Fig. 3 is a graph comparing the usage of the original power battery system and the existing power battery system according to one or more embodiments of the present invention, in which the vertical axis is SOC, the horizontal axis is time T, the charging period is from the original point to the point a ', the standing period is from the point a to the point B or from the point a ' to the point B ', the driving period is from the point B to the end, and the driving period is from the point B ' to the point C '. In a specific implementation scenario, for example, 4 lithium iron phosphate batteries replace 4 ternary lithium batteries, so that the low-voltage lithium battery module 12 is placed in the battery pack 1, and the heating film and the IBMS controller 5 are equipped, the SOC of the lithium iron phosphate batteries during charging, standing and driving is controlled as shown in fig. 3, where the capacity of the lithium iron phosphate battery pack serving as the low-voltage lithium battery module in the figure is 1.5kW · h, the capacity of the lead-acid battery is 0.45kW · h, the capacity is increased by 3.33 times, and the long-time parking without feeding is prolonged by 3.33 times. Compared with the original battery pack, the battery pack has basically consistent cruising duration, reduces the power consumption of the whole vehicle in hundred kilometers and lowers the cost. The specific parameter of relevance is shown to table 1 below, table 1 below be primary battery package with the utility model discloses power battery package's result of use contrast chart.
TABLE 1
In the table, NEDC means the new european driving cycle. At a constant speed of 40=26.4km, which means that the vehicle runs 26.4km at a constant speed of 40km/h, the same applies below. Therefore, the charge and discharge control is carried out on the low-voltage lithium battery module through the IBMS and the DCDC system, so that the endurance mileage of the whole vehicle can be kept unchanged. The low-voltage lithium battery module can supply a primary battery pack control system to perform battery equalization, SOC calibration and correction when a vehicle is in a dormant state.
Example 2
Particularly, the utility model also discloses a power battery system of new forms of energy vehicle, lie in with the difference of above-mentioned embodiment, including battery package 1 and the first low pressure lithium battery module of setting outside battery package 1, have high-pressure lithium battery module 11 and second low pressure lithium battery module in the battery package 1. The first low pressure battery module that independent setting in this embodiment can adapt to special operating mode.
According to the utility model discloses an embodiment, first low pressure lithium cell module and/or second low pressure lithium cell module still correspond the second zone of heating outward, and the second zone of heating is controlled to the low pressure lithium cell module that corresponds. For the specific control principle, please refer to embodiment 1 above, which is not described herein again. It is still to be noted that, since the heating layers are divided into two, both heating layers can be connected to the first thermal management module; or the number of the first heat management modules is two, and the two heating layers are managed respectively.
Example 3
Particularly, the utility model also discloses a new energy automobile, including foretell arbitrary new energy vehicle's power battery system.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. The utility model provides a new energy vehicle's power battery system, its characterized in that, includes the battery package, have multiunit high pressure lithium battery module, at least a set of low pressure lithium battery module in the battery package and with at least one first zone of heating that at least a set of low pressure lithium battery module corresponds, every first zone of heating is controlled to heat the low pressure lithium battery module that corresponds.
2. The power battery system of the new energy vehicle as claimed in claim 1, wherein the first heating layer is a heating film that encapsulates the low voltage lithium battery module.
3. The power battery system of the new energy vehicle as claimed in claim 1, wherein the low voltage lithium battery module comprises a plurality of lithium iron phosphate batteries.
4. The power battery system of the new energy vehicle as set forth in claim 1, further comprising a first thermal management unit connected to the first heating layer to control start and stop of the heating layer and temperature regulation.
5. The power battery system of the new energy vehicle as claimed in claim 1, further comprising a second thermal management unit coupled to the battery pack to provide temperature regulation to the battery pack.
6. The utility model provides a power battery system of new energy vehicle, its characterized in that includes the battery package and sets up the outer first low pressure lithium battery module of battery package, high pressure lithium battery module and second low pressure lithium battery module have in the battery package.
7. The power battery system of the new energy vehicle as claimed in claim 6, wherein the first low-voltage lithium battery module and/or the second low-voltage lithium battery module corresponds to a second heating layer, and the second heating layer is controlled to heat the corresponding low-voltage lithium battery module.
8. The power battery system of the new energy vehicle as claimed in claim 7, wherein the heating layer is a heating film that covers the first low-voltage lithium battery module and/or the second low-voltage lithium battery module.
9. The power battery system of the new energy vehicle as set forth in claim 7, further comprising a first thermal management unit connected to the second heating layer to control the start and stop of the second heating layer and temperature regulation.
10. A vehicle, characterized by comprising the power battery system of the new energy vehicle as claimed in any one of claims 1 to 5, or the power battery system of the new energy vehicle as claimed in any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220528872.5U CN217848185U (en) | 2022-03-11 | 2022-03-11 | Power battery system of new energy vehicle and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220528872.5U CN217848185U (en) | 2022-03-11 | 2022-03-11 | Power battery system of new energy vehicle and vehicle |
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| Publication Number | Publication Date |
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| CN217848185U true CN217848185U (en) | 2022-11-18 |
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| CN202220528872.5U Active CN217848185U (en) | 2022-03-11 | 2022-03-11 | Power battery system of new energy vehicle and vehicle |
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- 2022-03-11 CN CN202220528872.5U patent/CN217848185U/en active Active
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