Management system for vehicle braking energy

Abstract

The utility model relates to a management system for vehicle braking energy, and belongs to the technical field of braking energy management. Comprising a rotation device used for recharging braking energy to a battery, the rotation device is further connected with a PTC heater used for converting the braking energy into heat energy, and the PTC heater is used for being connected in a liquid cooling circulation loop in series. The PTC heater used for converting braking energy into heat energy is connected to an original rotating device, redundant braking energy is consumed through the PTC heater, the PTC heater is used for being connected in a liquid cooling circulation loop in series so as to achieve heat energy consumption, the use of the PTC heater is not limited to the environment temperature, and the service life of the PTC heater is prolonged. The redundant braking energy can be consumed in time under different environment conditions, and the applicability of the management system is effectively improved.

Description

Technical Field

[0001] The utility model relates to a management system for vehicle braking energy, belonging to the technical field of braking energy management. Background Art

[0002] Pure electric vehicles, with their zero-pollution and zero-emission advantages, have garnered widespread attention and development worldwide. Improving their range has become a key research focus for these vehicles. For pure electric engineering vehicles, achieving higher horsepower and longer range requires energy recovery to enhance their range. Pure electric mining trucks, as a mainstream type of pure electric engineering vehicle, are poised to become a significant competitor in the future mining truck market, driven by advancements in battery technology.

[0003] To increase the range of pure electric mining vehicles, the battery capacity has been continuously increased, and brake energy recovery devices have been added. Braking energy recovery devices recharge braking energy back into the battery through the slewing mechanism, thereby increasing the vehicle's range. However, when the battery energy storage reaches saturation, the recovered braking energy must be consumed promptly. Failure to do so will not only damage the slewing mechanism but also shorten the battery life.

[0004] To this end, the braking energy recovery device of the pure electric mining vehicle can be monitored and the recharging power of the slewing device can be controlled. However, the monitoring of the slewing device is difficult, and the recharging power of the slewing device is difficult to control, resulting in the excess recovered braking energy not being consumed in time, causing irreversible impact on the slewing device and battery life.

[0005] Traditional braking resistor systems primarily consume excess braking energy through braking resistors, which convert the braking energy into heat. This heat is then exchanged with the environment through water pipes surrounding the braking resistors. Natural heat dissipation occurs through the water pipes surrounding the braking resistors. This system is inefficient in consuming excess braking energy and is not suitable for sub-zero temperatures.

[0006] Chinese patent application publication number CN111845361A discloses a liquid-cooled automotive brake resistor system. This system places a cooling pipe surrounding the brake resistor in a liquid cooling circulation system. The radiator and water pump in the liquid cooling circulation system accelerate the heat exchange between the brake resistor and the environment. However, due to the limited heat conduction efficiency between the brake resistor and the cooling pipe, the upper limit of the excess braking energy consumed is low, and the applicability is poor. There is still a problem of untimely consumption of excess braking energy, which has irreversible effects on the slewing device and battery life. Utility Model Content

[0007] The purpose of the utility model is to provide a management system for vehicle braking energy, so as to solve the problem of poor applicability of the existing braking resistor system for consuming excess braking energy.

[0008] To achieve the above objectives, the solution of the utility model includes:

[0009] The utility model provides a management system for vehicle braking energy, including a rotary device for charging braking energy back to a battery. The rotary device is also connected to a PTC heater for converting braking energy into thermal energy. The PTC heater is connected in series in a liquid cooling circulation loop.

[0010] Furthermore, the liquid cooling circulation loop includes a circulating water pump and a radiator connected in series, and the radiator accelerates the heat exchange between the liquid cooling circulation loop and the environment through a heat dissipation fan.

[0011] Furthermore, the circulating water pump, the PTC heater and the radiator are connected in series in sequence.

[0012] Furthermore, the liquid cooling circulation loop also includes an expansion water tank, which is connected to the liquid cooling circulation loop to maintain the amount of liquid in the liquid cooling circulation loop.

[0013] Beneficial effects of the utility model:

[0014] The utility model is an improved invention, which provides a management system for vehicle braking energy. A PTC heater for converting braking energy into thermal energy is connected to the original rotary device, and excess braking energy is consumed by the PTC heater. The PTC heater is used to be connected in series in a liquid cooling circulation loop to realize the consumption of thermal energy. The use of the PTC heater is not limited to the ambient temperature, and it can consume excess braking energy in time under different environmental conditions, effectively improving the applicability of the management system.

[0015] The utility model converts braking energy into thermal energy through a PTC heater. The thermal energy is heat-exchanged with the environment in a liquid cooling circulation loop through a coolant in the PTC heater. The heat exchange between the liquid cooling circulation loop and the environment is accelerated by the cooperation of a radiator equipped with a fan and a circulating water pump. The use of the PTC heater is not limited to the ambient temperature. The PTC heater and the cooling fan can also be adjusted to meet the consumption of different braking energies, thus having better applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a working principle diagram of the management system for vehicle braking energy;

[0017] Figure 2 This is the working principle diagram of the PTC heater.

[0018] Description of reference numerals:

[0019] 1. Circulating water pump; 2. PTC heater; 3. Radiator; 4. Cooling fan; 5. Expansion tank; 6. Electric control box; 7. Electric control box; 8. Rotating device. DETAILED DESCRIPTION

[0020] To solve the problems in the background technology, the present invention consumes the excess braking energy recovered by the rotary device through a PTC heater, takes advantage of the low impact of the environment on the use of the PTC heater, and improves the applicability of the management system for vehicle braking energy.

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] An embodiment of a management system for vehicle braking energy:

[0023] A management system for vehicle braking energy includes a rotary device for charging braking energy back to a battery. The rotary device is also connected to a PTC heater for converting braking energy into thermal energy. The PTC heater is used to be connected in series in a liquid cooling circulation loop.

[0024] The liquid cooling circulation loop may be any existing liquid cooling circulation loop.

[0025] Of course, the liquid cooling circulation loop can be an independent circulation system. The specific PTC heater is connected in series in the liquid cooling circulation to work, and the entire liquid cooling circulation loop is an independent circulation system and is not related to the vehicle thermal management system, which makes the system more independent and stable.

[0026] Specifically, it is used for the management system of vehicle braking energy, such as Figure 1 As shown, it includes a rotary device for charging braking energy back to the battery. The rotary device is also connected to a PTC heater 2 for converting braking energy into thermal energy. The PTC heater 2 is connected in series in the liquid cooling circulation loop. The liquid cooling circulation loop includes a circulating water pump 1 and a radiator 3 connected in series. The radiator 3 accelerates the heat exchange between the liquid cooling circulation loop and the environment through the cooling fan 4.

[0027] Specifically, the circulating water pump 1 , the PTC heater 2 and the radiator 3 are connected in series in sequence.

[0028] Specifically, the liquid cooling circulation loop further includes an expansion water tank 5 , which is in communication with the liquid cooling circulation loop to maintain the amount of liquid in the liquid cooling circulation loop.

[0029] The management system for vehicle braking energy operates as follows:

[0030] The coolant (coolant) flowing out of the circulating water pump 1 enters the PTC heater 2, then passes through the radiator 3 for heat dissipation and returns to the circulating water pump 1 again. The power of the PTC heater 2 is provided by the rotary device.

[0031] The working principle of PTC heater 2 is as follows Figure 2 As shown, the main process is to send commands through the electrical control box 7, which controls the electrical control box 6 to transfer excess power in the rotary device 8 to the PTC heater 2. The rotary device 8 provides the power required for the PTC heater 2 to operate. The electrical control box 7 provides operating instructions to the PTC heater 2, controlling its on / off state and the power level.

[0032] The utility model heats and cools the coolant through the radiator and the PTC heater to form a whole circuit, and mainly consumes excess braking energy through the PTC heater to meet the working condition requirements of the pure electric engineering vehicle.

[0033] This utility model separates the braking energy consumption device, which maintains the stable recharging efficiency of the slewing device and ensures the service life of the vehicle battery. The braking energy consumption device is a PTC heater connected in series in the liquid cooling circuit.

[0034] The present invention applies a vehicle brake energy management system to pure electric mine vehicles. Considering that pure electric mine vehicles incorporate brake energy recovery to improve range, continued operation of the slewing mechanism after the battery reaches saturation can damage the battery. When the battery reaches saturation during brake energy recovery, the inability to dissipate the braking energy can damage the slewing mechanism. Conventional brake resistor systems, which utilize water pipes for surround cooling, are not only inefficient but also unsuitable for cold winters in regions. This new system utilizes a PTC heater and a water-core radiator to dissipate excess brake energy during recharging of the battery, maintaining a stable recharge power and thus ensuring battery life and vehicle operation. Compared to monitoring the entire vehicle's brake energy and controlling the recharge power of the slewing mechanism, this system is independently installed and dissipates excess brake energy through heating and cooling using the PTC heater and radiator, maintaining a stable recharge power and extending the battery life. This results in a simpler and more stable system. The number of PTC heaters, cooling fans, and expansion tanks, as well as the specifications of the circulating water pump, can be adjusted according to actual needs.

Claims

1. A management system for vehicle braking energy, comprising a rotary device for recharging braking energy back to a battery, characterized in that: The rotary device is further connected to a PTC heater for converting braking energy into thermal energy, and the PTC heater is used to be connected in series in a liquid cooling circulation loop.

2. The vehicle braking energy management system according to claim 1, characterized in that: The liquid cooling circulation loop includes a circulating water pump and a radiator connected in series, and the radiator accelerates heat exchange between the liquid cooling circulation loop and the environment through a heat dissipation fan.

3. The vehicle braking energy management system according to claim 2, characterized in that: The circulating water pump, PTC heater and radiator are connected in series in sequence.

4. The vehicle braking energy management system according to claim 2, characterized in that: The liquid cooling circulation loop further includes an expansion water tank, which is communicated with the liquid cooling circulation loop to maintain the amount of liquid in the liquid cooling circulation loop.

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