Power battery of all-terrain vehicle

Abstract

The utility model relates to the technical field of all-terrain vehicles, in particular to a power battery of an all-terrain vehicle. Comprising a shell, a heating film, a battery cell module, a BMS controller, a relay and a heating wire harness, the battery cell module, the BMS controller and the relay are arranged in the shell, the heating film is arranged on the outer side of the battery cell module, and the heating wire harness is connected with the heating film and the BMS controller. The problems that a pure electric all-terrain vehicle cannot meet the requirement for the power performance of the vehicle due to the low discharge rate in a low-temperature environment, and a lithium battery is prone to dissociation in the low-temperature environment and cannot charge a power battery can be solved. And meanwhile, the driving problem of the all-terrain vehicle in geographical environments such as rugged mountain roads, urgent earth roads, beaches and gobi and climatic environments such as rain and snow can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of all-terrain vehicles, in particular to a power battery for an all-terrain vehicle. Background Art

[0002] As the core component of pure electric vehicles, the power battery provides power to the motor controller to drive the motor to move the vehicle forward and reverse, and provides power to the DC-DC to charge the low-voltage battery to achieve normal operation of the vehicle and the normal operation of the vehicle's electrical loads.

[0003] In the design of traditional power batteries, the use environment of all-terrain is rarely considered. The waterproof and dustproof performance of power batteries is relatively poor, and the overall ability to withstand vibration and impact is low, so the existing power batteries have great limitations on usage scenarios and weather. In addition, when all-terrain vehicles are used in low-temperature environments (-20℃), due to the poor charging and discharging performance of lithium-ion power batteries, the power of all-terrain vehicles is poor in low-temperature environments, and lithium batteries are prone to decomposition at low temperatures, so it is dangerous to charge the power battery cells below 0℃.

[0004] In summary, it is very necessary to propose an all-terrain vehicle power battery that can be suitable for low-temperature environments. Summary of the invention

[0005] The utility model aims to provide an all-terrain vehicle power battery, which solves the problem that the existing all-terrain vehicle battery cannot be used in low temperature environments.

[0006] To achieve the above-mentioned purpose, the utility model adopts an all-terrain vehicle power battery, including a heating film, a battery cell module, a BMS controller, a relay and a heating harness. The heating film is arranged on the outside of the battery cell module, and the heating harness is respectively connected to the heating film and the BMS controller.

[0007] Wherein, the BMS controller monitors the single cell voltage, battery temperature, and charge and discharge current signals of the battery cell module.

[0008] Among them, the all-terrain vehicle power battery also includes a shell, and the battery cell module, the BMS controller and the relay are respectively arranged inside the shell.

[0009] Wherein, the shell is a sealed structure.

[0010] Wherein, the BMS controller is integrated with a power interface and a communication interface.

[0011] The utility model provides an all-terrain vehicle power battery. When charging the battery module in a low temperature environment, the charger starts the BMS controller. At this time, the BMS controller is responsible for monitoring the single cell voltage, battery temperature, charge and discharge current and other information of the battery module. When the temperature of the battery module is monitored to be lower than 0°C, the BMS controller controls the relay to close, and then uses the charger to supply power to the six heating films through the heating harness, thereby heating the four battery modules respectively. When the BMS controller monitors that the temperature of the battery module is higher than 0°C, the relay is controlled to close to charge the battery module, thereby protecting the battery module. It can solve the problem that the pure electric all-terrain vehicle cannot meet the vehicle power requirements due to the low discharge rate in a low temperature environment and the lithium battery is prone to decomposition in a low temperature environment and cannot charge the power battery. At the same time, it can solve the driving problem of the all-terrain vehicle in rugged mountain roads, rapidly built dirt roads, beaches, Gobi and other geographical environments and rain and snow climate environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is an exploded view of the power battery of the all-terrain vehicle of the present utility model.

[0014] Figure 2 It is a schematic diagram of the power battery of the all-terrain vehicle of the utility model.

[0015] 1- heating film, 2- battery cell module, 3- power interface, 4- communication interface, 5- BMS controller, 6- heating harness, 7- shell. DETAILED DESCRIPTION

[0016] See also Figure 1 and Figure 2 ,in Figure 1 This is an exploded view of the power battery of an all-terrain vehicle. Figure 2 This is the schematic diagram of the power battery for an all-terrain vehicle.

[0017] The utility model provides an all-terrain vehicle power battery: comprising a heating film 1, a battery module 2, a BMS controller 5, a relay and a heating harness 6, wherein the heating film 1 is arranged on the outside of the battery module 2, and the heating harness 6 is respectively connected to the heating film 1 and the BMS controller 5.

[0018] In this embodiment, when charging the battery module 2 in a low temperature environment, the charger starts the BMS controller 5, and at this time, the BMS controller 5 is responsible for monitoring the single cell voltage, battery temperature, charge and discharge current and other information of the battery module 2. When the temperature of the battery module 2 is monitored to be lower than 0°C, the BMS controller 5 controls the relay to close, and then uses the charger to supply power to the six heating films 1 through the heating harness 6, so as to heat the four battery modules 2 respectively. When the BMS controller 5 monitors that the temperature of the battery module 2 is higher than 0°C, it controls the relay to close and charge the battery module 2 to protect the battery module 2; it can solve the problem that the pure electric all-terrain vehicle cannot meet the vehicle power requirements due to the low discharge rate in a low temperature environment and the lithium battery is prone to decomposition in a low temperature environment and cannot charge the power battery. At the same time, it can solve the driving problem of the all-terrain vehicle in rugged mountain roads, rapidly built dirt roads, beaches, Gobi and other geographical environments and rainy and snowy climate environments.

[0019] Furthermore, the BMS controller 5 monitors the single cell voltage, battery temperature, and charge and discharge current signals of the battery cell module 2 .

[0020] Furthermore, the all-terrain vehicle power battery also includes a shell 7 , and the battery cell module 2 , the BMS controller 5 and the relay are respectively arranged inside the shell 7 .

[0021] Furthermore, the housing 7 is a sealed structure.

[0022] Furthermore, the BMS controller 5 is integrated with a power interface 3 and a communication interface 4 .

[0023] In this embodiment, the BMS controller 5 is integrated with the power interface 3 and the communication interface 4. When charging the battery module 2 in a low temperature environment, the charger starts the BMS controller 5 through the 12V low-voltage power supply provided by the communication interface 4. At this time, the BMS controller 5 is responsible for monitoring the single cell voltage, battery temperature, charge and discharge current and other information of the battery module 2. When the temperature of the battery module 2 is monitored to be lower than 0°C, the BMS controller 5 controls the relay to close, and then uses the high-voltage power provided by the charger through the power interface 3 to supply power to the six heating films 1 through the heating harness 6, thereby heating the four battery modules 2 respectively. The housing 7 is a sealed structure, which is dustproof and waterproof, and can withstand high-intensity vibration and impact. It uses natural cooling to dissipate heat, and has the relay and the BMS controller 5 built in, and has the discharge circuit pre-charging function and heating function. The BMS controller 5 is responsible for monitoring the single cell voltage, battery temperature, charge and discharge current and other information of the battery, and uploads the information to the vehicle control system through the CAN bus. Isolate CAN communication, support bus upgrade function, support host computer monitoring software and protection parameters can be modified, and estimate the remaining capacity SOC of the battery pack in real time. It can also control the on and off of the charging and discharging circuit to achieve overcharge, over-discharge and overcurrent protection of the battery, and realize temperature management of the battery module 2 by controlling the start and stop of the heating film 1. Figure 2 As shown in the schematic diagram, the heating function is that when the battery module 2 receives the start signal from the vehicle control system in a low temperature environment (-20°C), the BMS controller 5 controls the heating film 1 to start, heats the battery module 2 to above 0°C, and discharges at a high rate to meet the power requirements of the all-terrain vehicle. On the other hand, when the all-terrain vehicle is charged in a low temperature environment (-20°C), the charger sends a charging signal to the BMS controller 5, and the BMS controller 5 controls the heating film 1 to start, heats the battery module 2 to above 0°C within 40 minutes, and then charges the battery module 2.

[0024] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. An all-terrain vehicle power battery, characterized in that: It includes a heating film, a battery module, a BMS controller, a relay and a heating harness. The heating film is arranged on the outside of the battery module, and the heating harness is respectively connected to the heating film and the BMS controller.

2. The all-terrain vehicle power battery according to claim 1, characterized in that: The BMS controller monitors the single cell voltage, battery temperature, and charge and discharge current signals of the battery cell module.

3. The all-terrain vehicle power battery according to claim 1, characterized in that: The all-terrain vehicle power battery also includes a shell, and the battery cell module, the BMS controller and the relay are respectively arranged inside the shell.

4. The all-terrain vehicle power battery according to claim 3, characterized in that: The housing is a sealed structure.

5. The all-terrain vehicle power battery according to claim 1, characterized in that: The BMS controller is integrated with a power interface and a communication interface.

Images