Starting and parking hybrid battery for heavy truck and control method thereof

Abstract

The invention discloses a starting and parking hybrid battery for a heavy truck and a control method thereof, and belongs to the technical field of vehicle power supplies. The hybrid battery comprises a power supply box body, a high-rate battery cell pack, a low-rate battery cell pack and an intelligent control device, the high-rate battery cell pack and the low-rate battery cell pack are arranged in the power supply box body, a positive pole and a negative pole are arranged on the power supply box body, and the high-rate battery cell pack and the low-rate battery cell pack are connected with the positive pole and the negative pole through the intelligent control device; the intelligent control device comprises a state monitoring module used for monitoring the running state of the vehicle, and the running state of the vehicle comprises starting and parking; the discharging control module is used for switching the high-magnification battery core bag to supply power when the vehicle is in a starting state; and when the vehicle is in a parking state, the low-rate battery cell is switched to supply power. According to the invention, the cost can be effectively reduced, and the electricity safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power supply, and in particular to a starting and parking hybrid battery for a heavy truck and a control method thereof. Background Art

[0002] At present, heavy trucks generally use lithium batteries for starting and parking. Lithium batteries have the advantages of high energy density and long life, so they can effectively meet the starting and parking needs of heavy trucks. However, the cost of lithium batteries is relatively high. At the same time, due to their high energy density, they are prone to thermal runaway and cause fire or explosion, especially when the vehicle is started, a large current output is required, which can easily cause lithium batteries to overheat. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a starting and parking hybrid battery for heavy trucks and a control method thereof, which can effectively reduce costs and ensure electricity safety.

[0004] The objective of the present invention is achieved through the following technical solutions: In the first aspect, the embodiments of the present specification provide a hybrid battery for starting and parking a heavy truck, including a power supply box, a high-rate battery pack and a low-rate battery pack arranged in the power supply box, and an intelligent control device. The power supply box is provided with positive and negative poles, and the high-rate battery pack and the low-rate battery pack are connected to the positive and negative poles through the intelligent control device; the intelligent control device includes: The status monitoring module is used to monitor the running status of the vehicle, including starting and parking; The discharge control module is used to switch the high-rate battery pack to supply power when the vehicle is in the starting state; when the vehicle is in the parking state, it switches the low-rate battery pack to supply power.

[0005] Preferably, the intelligent control device comprises: The charging control module is used to control the charging of each battery pack according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack.

[0006] Preferably, the intelligent control device comprises: The battery pack detection module is used to collect status data of each battery pack; the discharge control module and the charge control module adjust the charge and discharge of each battery pack according to the status data of each battery pack.

[0007] Preferably, the intelligent control device comprises: The deep learning module is used to record the charging and discharging process and status data of each battery pack, and to adjust the discharge control module and the charging control module.

[0008] Preferably, the intelligent control device comprises: An isolation module is used to isolate the high-rate battery cell pack from the low-rate battery cell pack.

[0009] In a second aspect, an embodiment of the present specification provides a method for controlling a start-park hybrid battery for a heavy truck, wherein the hybrid battery includes a high-rate battery pack and a low-rate battery pack, and the control method includes: Monitor the vehicle's operating status, including starting and parking; When powering the vehicle: when the vehicle is in the starting state, switch to the high-rate battery pack for power supply; when the vehicle is in the parking state, switch to the low-rate battery pack for power supply.

[0010] Preferably, the control method comprises: When charging the battery: according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack, control the charging of each battery pack.

[0011] Preferably, the control method comprises: The status data of each battery pack is collected; the discharge control module and the charge control module adjust the charge and discharge of each battery pack according to the status data of each battery pack.

[0012] Preferably, the control method comprises: Record the charging and discharging process and status data of each battery pack, and adjust the discharge control module and the charging control module.

[0013] Preferably, the control method comprises: The high-rate battery cell pack and the low-rate battery cell pack are isolated.

[0014] The advantages of the present invention are: a battery structure combining a high-rate battery pack and a low-rate battery pack is adopted, and different battery packs are switched for power supply based on the vehicle operating status, which makes it easier to reasonably match different power demands, and different types of battery packs can play their respective advantages in corresponding scenarios, taking into account the capacity, life and safety of the product, and improving the cost performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a starting and parking hybrid battery for a heavy truck provided in this embodiment; Figure 2 A functional module diagram of the intelligent control device provided in this embodiment; Figure 3 A flowchart of a start-park hybrid battery control method for a heavy truck provided in this embodiment; In the figure: 1-power box; 3-high rate battery pack; 4-low rate battery pack; 5-positive pole; 6-negative pole. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] like Figure 1 As shown, this embodiment provides a starting and parking hybrid battery for heavy trucks, including a power box 1, a high-rate battery pack 3 and a low-rate battery pack 4 arranged in the power box, and an intelligent control device. The power box is provided with a positive pole 5 and a negative pole 6, and the high-rate battery pack 3 and the low-rate battery pack 4 are connected to the positive and negative poles through the intelligent control device; Figure 2 As shown, the intelligent control device includes: The status monitoring module is used to monitor the running status of the vehicle, including starting and parking; The discharge control module is used to switch the high-rate battery pack to supply power when the vehicle is in the starting state; when the vehicle is in the parking state, it switches the low-rate battery pack to supply power.

[0018] Specifically, the high-rate battery pack can use a sodium-ion battery pack. The cost of sodium-ion batteries is relatively low. At the same time, its electrolyte is an inorganic salt solution, which is not easy to cause thermal runaway and has good high-temperature resistance. Its high-rate characteristics can ensure that it releases enough electricity in a short time to meet the power demand of heavy trucks when starting and ensure the stability of starting. The low-rate battery pack can use a lithium-ion battery pack. The energy density of lithium-ion batteries is high, which can ensure the storage capacity of the entire hybrid battery. At the same time, it has a long service life and can meet the long-term power demand of heavy trucks when they are parked.

[0019] Of course, in some special cases, the discharge control module also includes: The emergency discharge unit is used to monitor the power of the high-rate battery pack when the vehicle is in the starting state. When the power of the high-rate battery pack is lower than the first set threshold, the high-rate battery pack and the low-rate battery pack are used to supply power at the same time according to the set ratio; when the power of the high-rate battery pack is lower than the second set threshold, the low-rate battery pack is switched to supply power. The first set threshold is greater than the second set threshold.

[0020] When the vehicle is in the parking state, the power of the low-rate battery pack is monitored. When the power of the low-rate battery pack is lower than the third set threshold, the high-rate battery pack and the low-rate battery pack are used to supply power at the same time according to the set ratio; when the power of the low-rate battery pack is lower than the fourth set threshold, the high-rate battery pack is switched to supply power. The third set threshold is greater than the fourth set threshold.

[0021] Intelligent control device includes: The charging control module is used to control the charging of each battery pack according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack. The operating state of the vehicle also includes parking.

[0022] Specifically, when the vehicle is in a parking state, when the power of the low-rate battery pack is lower than the fifth set threshold, switch to charging the low-rate battery pack to ensure the power supply of the on-board electrical appliances. When the power of the low-rate battery pack is higher than the sixth set threshold, and the power of the high-rate battery pack is lower than the seventh set threshold, switch to charging the high-rate battery pack, which means that the low-rate battery pack can maintain sufficient power supply time and give priority to meeting the power required for the next vehicle start. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, switch to charging the low-rate battery pack. On the premise of ensuring the power required for the next vehicle start, give priority to providing enough power for the on-board electrical appliances to deal with unexpected situations. When the power of the low-rate battery pack is greater than or equal to the sixth set threshold, and the power of the high-rate battery pack is greater than or equal to the seventh set threshold, switch to charging the high-rate battery pack and the low-rate battery pack at the same time in a certain proportion to reduce the heat of each battery pack, slow down the aging of the battery pack, delay the service life, and improve safety. Among them, the sixth set threshold is greater than the fifth set threshold.

[0023] When the vehicle is parked, when the power of the high-rate battery pack is lower than the seventh set threshold, switch to charging the high-rate battery pack to give priority to meeting the power required for vehicle starting. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, and the power of the low-rate battery pack is lower than the fifth set threshold, switch to charging the low-rate battery pack to ensure timely power supply to the on-board electrical appliances after the vehicle starts. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, and the power of the low-rate battery pack is greater than or equal to the fifth set threshold, switch to charging the high-rate battery pack and the low-rate battery pack at the same time in a certain proportion to reduce the heat of each battery pack, slow down the aging of the battery pack, delay the service life, and improve safety at the same time.

[0024] Intelligent control device includes: The battery pack detection module is used to collect the status data of each battery pack, including power, temperature, charging and discharging efficiency, etc.; the discharge control module and the charging control module adjust the charging and discharging of each battery pack according to the status data of each battery pack. Among them, the electric energy data is mainly used for the charging and discharging control module to perform the above-mentioned charging and discharging logic control. The temperature data mainly takes safety into consideration and takes precedence over the above-mentioned charging and discharging logic control. When the temperature of a battery pack is greater than or equal to the set safety value, the charging of the battery pack is suspended until the temperature of the battery pack is lower than the set safety value, and the above-mentioned charging and discharging logic control is performed on the battery pack again. The charging and discharging efficiency is mainly used when the high-rate battery pack and the low-rate battery pack are charged at the same time. According to the respective power shortage and real-time charging and discharging efficiency, the respective charging efficiency is adjusted, that is, the above-mentioned certain proportion, to achieve the purpose of fully charging the high-rate battery pack and the low-rate battery pack at the same time, so as to save charging time.

[0025] Intelligent control device includes: The deep learning module is used to record the charging and discharging process and status data of each battery pack, and adjust the discharge control module and the charging control module. Among them, the charging and discharging process and status data mainly include the charging and discharging time point, charging and discharging duration, charging and discharging efficiency, the power of the battery pack and the temperature change. The adjustment of the charging and discharging module may include: obtaining the rate of change of temperature over time of a certain battery pack under a certain average charging efficiency, or a certain average discharging efficiency, or a certain average charging and discharging efficiency, and accordingly adjusting the maximum duration of the subsequent charging and discharging process of the battery pack to avoid excessive temperature. Of course, the above-mentioned change rate will continue to learn and update to adapt to different environments and the aging status of the battery pack at different stages.

[0026] Intelligent control device includes: The isolation module is used to isolate the high-rate battery pack and the low-rate battery pack to prevent the two battery packs from affecting each other. For example, when the low-rate battery pack is powering the on-board electrical appliances and the high-rate battery pack is being charged at the same time, the electric energy output by the low-rate battery pack is charged into the high-rate battery pack, thereby affecting the normal use of the on-board electrical appliances.

[0027] like Figure 3 As shown, the embodiment of this specification provides a method for controlling a starting and parking hybrid battery for a heavy truck, wherein the hybrid battery includes a high-rate battery pack and a low-rate battery pack, and the control method includes: Step 102, monitoring the running state of the vehicle, the running state of the vehicle including starting and parking; Step 104a, when supplying power to the vehicle: when the vehicle is in the starting state, switch to the high-rate battery pack for power supply; when the vehicle is in the parking state, switch to the low-rate battery pack for power supply.

[0028] Specifically, the high-rate battery pack can use a sodium-ion battery pack. The cost of sodium-ion batteries is relatively low. At the same time, its electrolyte is an inorganic salt solution, which is not easy to cause thermal runaway and has good high-temperature resistance. Its high-rate characteristics can ensure that it releases enough electricity in a short time to meet the power demand of heavy trucks when starting and ensure the stability of starting. The low-rate battery pack can use a lithium-ion battery pack. The energy density of lithium-ion batteries is high, which can ensure the storage capacity of the entire hybrid battery. At the same time, it has a long service life and can meet the long-term power demand of heavy trucks when they are parked.

[0029] Of course, in some special cases, step 104a also includes: When the vehicle is in the starting state, the power of the high-rate battery pack is monitored. When the power of the high-rate battery pack is lower than the first set threshold, the high-rate battery pack and the low-rate battery pack are used to supply power at the same time according to the set ratio; when the power of the high-rate battery pack is lower than the second set threshold, it switches to the low-rate battery pack for power supply.

[0030] When the vehicle is in the parking state, the power of the low-rate battery pack is monitored. When the power of the low-rate battery pack is lower than the third set threshold, the high-rate battery pack and the low-rate battery pack are used to supply power at the same time according to the set ratio; when the power of the low-rate battery pack is lower than the fourth set threshold, the high-rate battery pack is switched to supply power.

[0031] Control methods include: Step 104b, when charging the battery: according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack, control the charging of each battery pack, and the operating state of the vehicle also includes parking.

[0032] Specifically, when the vehicle is in a parking state, when the power of the low-rate battery pack is lower than the fifth set threshold, switch to charging the low-rate battery pack to ensure the power supply of the on-board electrical appliances. When the power of the low-rate battery pack is higher than the sixth set threshold, and the power of the high-rate battery pack is lower than the seventh set threshold, switch to charging the high-rate battery pack, which means that the low-rate battery pack can maintain sufficient power supply time and give priority to meeting the power required for the next vehicle start. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, switch to charging the low-rate battery pack. On the premise of ensuring the power required for the next vehicle start, give priority to providing enough power for the on-board electrical appliances to deal with unexpected situations. When the power of the low-rate battery pack is greater than or equal to the sixth set threshold, and the power of the high-rate battery pack is greater than or equal to the seventh set threshold, switch to charging the high-rate battery pack and the low-rate battery pack at the same time in a certain proportion to reduce the heat of each battery pack, slow down the aging of the battery pack, delay the service life, and improve safety at the same time.

[0033] When the vehicle is parked, when the power of the high-rate battery pack is lower than the seventh set threshold, switch to charging the high-rate battery pack to give priority to meeting the power required for vehicle starting. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, and the power of the low-rate battery pack is lower than the fifth set threshold, switch to charging the low-rate battery pack to ensure timely power supply to the on-board electrical appliances after the vehicle starts. When the power of the high-rate battery pack is greater than or equal to the seventh set threshold, and the power of the low-rate battery pack is greater than or equal to the fifth set threshold, switch to charging the high-rate battery pack and the low-rate battery pack at the same time in a certain proportion to reduce the heat of each battery pack, slow down the aging of the battery pack, delay the service life, and improve safety at the same time.

[0034] Control methods include: Step 100, collect the status data of each battery pack, including power, temperature, charge and discharge efficiency, etc.; the discharge control module and the charge control module adjust the charge and discharge of each battery pack according to the status data of each battery pack. Among them, the electric energy data is mainly used for the charge and discharge control module to perform the above-mentioned charge and discharge logic control. The temperature data mainly takes safety into consideration and takes precedence over the above-mentioned charge and discharge logic control. When the temperature of a battery pack is greater than or equal to the set safety value, the charging of the battery pack is suspended until the temperature of the battery pack is lower than the set safety value, and the above-mentioned charge and discharge logic control is performed on the battery pack again. The charge and discharge efficiency is mainly used when the high-rate battery pack and the low-rate battery pack are charged at the same time. According to the respective power shortage and real-time charge and discharge efficiency, the respective charging efficiency is adjusted, that is, the above-mentioned certain proportion, to achieve the purpose of fully charging the high-rate battery pack and the low-rate battery pack at the same time, so as to save charging time.

[0035] Control methods include: Step 106, record the charging and discharging process and status data of each battery pack, and adjust the discharge control module and the charging control module. Among them, the charging and discharging process and status data mainly include charging and discharging time points, charging and discharging duration, charging and discharging efficiency, the amount of electricity and temperature changes of the battery pack, etc. The adjustment of the charging and discharging module may include: obtaining the rate of change of temperature over time of a certain battery pack under a certain average charging efficiency, or a certain average discharging efficiency, or a certain average charging and discharging efficiency, and accordingly adjusting the maximum duration of the subsequent charging and discharging process of the battery pack to avoid the occurrence of excessive temperature. Of course, the above-mentioned rate of change will continue to learn and update to adapt to different environments and the aging status of the battery pack at different stages.

[0036] Control methods include: The high-rate battery pack and the low-rate battery pack are isolated to prevent the two battery packs from affecting each other. For example, when the low-rate battery pack is powering on-board electrical appliances and the high-rate battery pack is being charged at the same time, the electric energy output by the low-rate battery pack is charged into the high-rate battery pack, thereby affecting the normal use of the on-board electrical appliances.

[0037] The above is only a preferred specific embodiment of the present invention, which is an implementation method based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A starting and parking hybrid battery for heavy trucks, characterized in that: It includes a power box, a high-rate battery pack and a low-rate battery pack arranged in the power box, and an intelligent control device. The power box is provided with positive and negative poles. The high-rate battery pack and the low-rate battery pack are connected to the positive and negative poles through the intelligent control device. The intelligent control device includes: A status monitoring module is used to monitor the running status of the vehicle, including starting and parking; The discharge control module is used to switch the high-rate battery pack to supply power when the vehicle is in the starting state; when the vehicle is in the parking state, it switches the low-rate battery pack to supply power.

2. A starting and parking hybrid battery for heavy trucks according to claim 1, characterized in that: The intelligent control device comprises: The charging control module is used to control the charging of each battery pack according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack.

3. A starting and parking hybrid battery for heavy trucks according to claim 2, characterized in that: The intelligent control device comprises: The battery pack detection module is used to collect status data of each battery pack; the discharge control module and the charge control module adjust the charge and discharge of each battery pack according to the status data of each battery pack.

4. A starting and parking hybrid battery for heavy trucks according to claim 3, characterized in that: The intelligent control device comprises: The deep learning module is used to record the charging and discharging process and status data of each battery pack, and to adjust the discharge control module and the charging control module.

5. A starting and parking hybrid battery for heavy trucks according to claim 1, characterized in that: The intelligent control device comprises: An isolation module is used to isolate the high-rate battery cell pack from the low-rate battery cell pack.

6. A start-and-park hybrid battery control method for heavy trucks, characterized in that: The hybrid battery includes a high-rate battery pack and a low-rate battery pack, and the control method includes: Monitor the vehicle's operating status, including starting and parking; When powering the vehicle: when the vehicle is in the starting state, switch to the high-rate battery pack for power supply; when the vehicle is in the parking state, switch to the low-rate battery pack for power supply.

7. A starting and parking hybrid battery control method for heavy trucks according to claim 6, characterized in that: The control method comprises: When charging the battery: according to the operating state of the vehicle and the power of the high-rate battery pack and the low-rate battery pack, control the charging of each battery pack.

8. A starting and parking hybrid battery control method for heavy trucks according to claim 7, characterized in that: The control method comprises: The status data of each battery pack is collected; the discharge control module and the charge control module adjust the charge and discharge of each battery pack according to the status data of each battery pack.

9. A starting and parking hybrid battery control method for heavy trucks according to claim 8, characterized in that: The control method comprises: Record the charging and discharging process and status data of each battery pack, and adjust the discharge control module and the charging control module.

10. A starting and parking hybrid battery control method for heavy trucks according to claim 6, characterized in that: The control method comprises: The high-rate battery cell pack and the low-rate battery cell pack are isolated.

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