Dual-mode switched start power system and mobile vehicle

Abstract

The utility model discloses a kind of starting power supply systems of dual-mode switching, it is related to battery technology field, especially it is a kind of starting power supply system and mobile carrier of dual-mode switching, it includes: power module, switching module, positive output interface and negative output interface;Power module includes main battery and secondary battery;Switching module includes first switching unit and second switching unit;First switching unit is arranged between main battery and negative output interface or positive output interface, second switching unit is arranged between secondary battery and negative output interface or positive output interface, respectively for controlling the conduction of corresponding current and the direction of flow, its main battery is responsible for parking and normal start, only in low temperature environment or main battery power / voltage is insufficient, system starts high rate secondary battery, not only can effectively improve starting efficiency, especially in low temperature environment, only need to heat secondary battery to meet starting demand, energy loss reduces 40 times.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field especially relates to a kind of dual-mode switching starting power system and mobile carrier. BACKGROUND

[0002] With the continuous improvement of intelligent level of truck, vehicle-mounted electrical equipment is increasing, and the demand for long-time power supply is growing rapidly. At present, the traditional truck generally uses lead-acid battery as starting power, although its safety performance is higher, but there are many drawbacks in practical application: first, the low-temperature performance of lead-acid battery is poor, and the starting ability is significantly reduced in cold environment; second, its volume is large, weight is heavy, and energy density is low; third, the cycle life is short, and the self-discharge rate is high, and the economy is poor in long-term use.

[0003] To overcome the shortcomings of lead-acid battery, lithium battery start-stop power supply gradually appears in the market as a replacement scheme. Although this scheme improves the energy density and cycle life to some extent, and relieves the parking power supply endurance problem, but due to the use of single low-rate power cell or energy storage cell, it still has obvious shortcomings in key performance: insufficient starting reliability: especially in low-temperature environment and low power state, the battery resistance increases, the output voltage drops sharply, and cannot provide the large current required for vehicle starting, resulting in starting failure. To ensure successful starting next time, the system must reserve a certain proportion (for example, more than 20%) of power, which seriously limits the actual available capacity of the battery and shortens the parking power supply time.

[0004] High energy consumption in low temperature: under low temperature condition, the chemical activity of lithium battery is reduced, and the battery pack must be preheated by built-in heating system before normal starting. The energy consumption of heating the whole battery pack is huge, and the energy efficiency is very low, which further aggravates the energy waste problem. Therefore, there is an urgent need in the field for an innovative power solution that can meet the dual needs of long-time parking power supply and high-reliability emergency starting of truck, and effectively solve the industry common technical problems of starting difficulty and low energy utilization rate in low temperature environment. UTILITY MODEL CONTENT

[0005] The utility model aims at avoiding the deficiencies in the prior art and providing a technology that can realize dual-mode switching starting.

[0006] The utility model achieves the purpose by the following technical scheme: According to one aspect of the utility model, provide a kind of dual-mode switching starting power supply system, comprising: power module, switching module, positive output interface and negative output interface;Power module includes main battery and secondary battery;And the positive terminal of main battery and secondary battery is connected with positive output interface, the negative terminal of main battery and secondary battery is connected with negative output interface;Switching module at least includes one switching unit, switching unit is arranged between main battery and secondary battery, for controlling the conduction of current.

[0007] Specifically, the main battery uses a low-rate battery pack; the secondary battery uses a high-rate battery pack; the main battery and the secondary battery are connected in parallel.

[0008] More specifically, it further includes a control module; the control module includes a master control MCU; the switching unit includes a first switching unit and a second switching unit; the first switching unit is arranged between the main battery and the negative output interface or the positive output interface, and the second switching unit is arranged between the secondary battery and the negative output interface or the positive output interface, and is respectively used for controlling the conduction and the flow direction of the corresponding current; the master control MCU is connected with the first switching unit and the second switching unit respectively.

[0009] More specifically, the first switching unit includes a first MOS tube and a second MOS tube; the source or drain of the first MOS tube is connected with the drain or source of the second MOS tube, and the turn-off directions of the first MOS tube and the second MOS tube are opposite; the second switching unit includes a third MOS tube and a fourth MOS tube; the source or drain of the third MOS tube is connected with the drain or source of the fourth MOS tube, and the turn-off directions of the third MOS tube and the fourth MOS tube are opposite.

[0010] More specifically, the master control MCU is connected with the gate of the second MOS tube and the fourth MOS tube respectively.

[0011] More specifically, the first switching unit further includes a first monitoring chip; the second switching unit further includes a second monitoring chip; the first monitoring chip is connected with the gate of the first MOS tube; the second monitoring chip is connected with the third MOS tube.

[0012] More specifically, the first monitoring chip is further connected with a first temperature measuring probe; the second monitoring chip is further connected with a second temperature measuring probe.

[0013] The above further includes a sampling module; the sampling module is connected with the main battery and the master control MCU respectively, and is used for collecting the output voltage of the main battery.

[0014] Further, the sampling module includes a first voltage dividing resistor and a second voltage dividing resistor; one end of the first voltage dividing resistor is connected with one end of the second voltage dividing resistor, and is connected with the master control MCU at the same time; the other end of the first voltage dividing resistor is connected with the positive electrode of the main battery, and the other end of the second voltage dividing resistor is grounded.

[0015] According to another aspect of the utility model, still provide a kind of mobile carrier, using the starting power supply system of above-mentioned dual-mode switching.

[0016] The utility model discloses the beneficial effect reached: a kind of dual-mode switching's starting power supply system, comprising: power module, switching module, positive output interface and negative output interface;Power module includes main battery and secondary battery;Main battery and secondary battery are connected in parallel, and the positive terminal of main battery and secondary battery is connected with positive output interface, and the negative terminal is connected with negative output interface;Switching module includes first switching unit and second switching unit;First switching unit is arranged between main battery and negative output interface or positive output interface, and second switching unit is arranged between secondary battery and negative output interface or positive output interface, respectively for controlling the conduction of corresponding current and direction, its main battery is responsible for parking and normal start, only in low temperature environment or main battery power / voltage is insufficient, system starts high rate secondary battery, not only can effectively improve starting efficiency, especially in low temperature environment, Only need to heat secondary battery can meet the starting demand, and energy loss reduces 40 times. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be simply introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0018] Figure 1 It is the principle block diagram of a kind of dual-mode switching's starting power supply system of the embodiment of the utility model; Figure 2 It is the circuit principle schematic diagram of power module and switching module of a kind of dual-mode switching's starting power supply system of the embodiment of the utility model; Figure 3 It is the circuit principle schematic diagram of acquisition module of a kind of dual-mode switching's starting power supply system of the embodiment of the utility model; Figure 4 It is the circuit principle schematic diagram of first switching unit of a kind of dual-mode switching's starting power supply system of the embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described clearly and completely below by referring to the drawings in the utility model embodiments, and obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Embodiment 1 One of the implementation methods of the dual-mode switching starting power supply system of the utility model is shown as follows, which comprises a power module, a switching module, a control module, an acquisition module, a positive output interface and a negative output interface. Figures 1 to 4 The power module comprises a main battery and a secondary battery; the main battery B1 and the secondary battery B2 are connected in parallel, and the positive terminals (B1+ and B2+) of the main battery B1 and the secondary battery B2 are connected with the positive output interface P+, and the negative terminals (B1- and B2-) are connected with the negative output interface P-. Among them, the main battery B1 adopts a low-rate battery pack; the secondary battery B2 adopts a high-rate battery pack; the positive output interface P+ and the negative output interface P- are external interfaces of the power supply system, which are used for connecting with a mobile carrier and supplying power for the mobile carrier.

[0021] In the embodiment, the power module further comprises an internal power supply circuit for supplying power to the switching module and the control module.

[0022] Specifically, the switching module comprises a first switching unit and a second switching unit; the first switching unit is arranged between the main battery B1 and the negative output interface P- or the positive output interface P+ (in this embodiment, the arrangement between B1 and the negative output interface P- is taken as an example), and the second switching unit is arranged between the secondary battery B2 and the negative output interface P- or the positive output interface P+ (in this embodiment, the arrangement between B1 and the negative output interface P- is taken as an example), which are respectively used for controlling the conduction and the flow direction of the corresponding current.

[0023] The control module comprises a master control MCU; the master control MCU is connected with the first switching unit and the second switching unit.

[0024] More specifically, the first switching unit comprises a first MOS tube D1 and a second MOS tube C1; the source or drain of the first MOS tube D1 is connected with the drain or source of the second MOS tube C1, and the off directions of the first MOS tube D1 and the second MOS tube C1 are opposite; the second switching unit comprises a third MOS tube D2 and a fourth MOS tube C2; the source or drain of the third MOS tube D2 is connected with the drain or source of the fourth MOS tube C2, and the off directions of the third MOS tube D2 and the fourth MOS tube C2 are opposite.

[0025] More specifically, the main control MCU is connected with the gate of the second MOS transistor C1 and the fourth MOS transistor C2 respectively.

[0026] The first switching unit further comprises a first monitoring chip U10, and the second switching unit further comprises a second monitoring chip; the first monitoring chip is connected with the gate of the first MOS transistor D1; and the second monitoring chip is connected with the third MOS transistor D2. Figure 4 The circuit principle diagram corresponding to the first switching unit is shown in the embodiment, and the second switching unit has the same structure as the first switching unit, and thus will not be described again.

[0027] In some embodiments, the first monitoring chip U10 is further configured to monitor the voltage of the main battery B1, and the second monitoring chip is further configured to monitor the voltage of the auxiliary battery B2.

[0028] The sampling module is connected with the main battery and the main control MCU respectively, and is configured to collect the output voltage of the main battery. The main control MCU can calculate the current battery capacity according to the collected voltage data.

[0029] In some embodiments, the first monitoring chip is further connected with a first temperature measuring probe, and the second monitoring chip is further connected with a second temperature measuring probe, and is configured to monitor the temperature of the main battery B1 and the auxiliary battery B2 respectively.

[0030] Specifically, the sampling module comprises a first voltage dividing resistor R1 and a second voltage dividing resistor R2. One end of the first voltage dividing resistor R1 is connected with one end of the second voltage dividing resistor R2, and is connected with the main control MCU at the same time; the other end of the first voltage dividing resistor R1 is connected with the positive electrode of the main battery B1, and the other end of the second voltage dividing resistor R2 is grounded.

[0031] Specific working principle: In the embodiment, the system can be divided into a single battery output mode and a double battery output mode.

[0032] 1. When the capacity of the main battery B1 is greater than a set capacity threshold (for example, 5%), the system defaults to a single battery input and output mode, and the main battery can be used for starting and parking alone. At this time, the first MOS transistor D1 and the second MOS transistor C1 are opened, the third MOS transistor D2 and the fourth MOS transistor C2 are closed, and the system is powered by the main battery B1 only.

[0033] 2. In the single battery input and output mode, when the voltage of B1+ is detected to be less than a set voltage threshold (for example, 7V), the system is actively switched to a double battery (main battery B1 and auxiliary battery B2) mode, and starting is performed through the double battery.

[0034] 3. When the capacity of the main battery B1 is less than a set capacity threshold, a protection mechanism is triggered, and at this time, the double battery mode needs to be manually entered to start through the double battery.

[0035] The dual-battery mode includes both dual-battery output mode and dual-battery input / output mode.

[0036] 1) When the voltage of the main battery B1 is greater than or equal to the voltage of the secondary battery B2, the dual-battery input / output mode is entered. At this time, the first MOSFET D1, the second MOSFET C1, the third MOSFET D2, and the fourth MOSFET C2 are all turned on. The main battery B1 and the secondary battery B2 can both discharge and charge. During this time, the high-rate secondary battery B2 will be continuously charged to full capacity by the low-rate main battery B1.

[0037] 2) When the voltage of the main battery B1 is lower than that of the auxiliary battery B2, to prevent the auxiliary battery B2 from charging the main battery B1 in reverse, the second MOSFET C1 needs to be turned off, entering the dual-battery output mode. At this time, the second MOSFET C1 is off, while the first MOSFET D1, the third MOSFET D2, and the fourth MOSFET C2 are on. Since MOSFETs are unidirectional turn-off devices, when the second MOSFET C1 is off, the charging current cannot pass through it. Therefore, the low-rate main battery B1 is in a dischargeable but not rechargeable state, and it shares the same output port with the high-rate auxiliary battery B2, operating in parallel. This prevents the high-rate auxiliary battery B2 from reversing and charging the low-rate main battery B1, thus improving the startup success rate.

[0038] According to another aspect of the present invention, a mobile vehicle is also provided, which employs the above-described dual-mode switching start-up power system.

[0039] In summary, the dual-mode switching starter power supply system of this utility model has the following effect: 1) Solves the problem of difficult low-temperature start-up and serious energy waste, effectively improving the start-up success rate; Its main battery is responsible for parking and normal starting. The system only starts the high-rate auxiliary battery when the main battery is low in low temperature environment or when the main battery is low in power / voltage. This not only effectively improves starting efficiency, but also meets the starting requirements by heating the auxiliary battery, especially in low temperature environment, reducing energy loss by 40 times.

[0040] 2) There is no need to reserve too much power margin to ensure the starting voltage, which improves the battery life and the utilization rate of the battery.

[0041] In traditional solutions, at least 20% of the battery capacity must be retained to prevent the battery from running out of power and failing to start. However, in the technical solution of this invention, because a high-rate auxiliary battery B2 is used in parallel to boost the voltage, the main battery B1 can continue to be used until the battery capacity is low (e.g., 5%). This greatly improves the effective utilization rate of battery capacity.

[0042] It should be noted that the above only the preferred embodiments of the present application and the use of technical principles. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, those skilled in the art can make various obvious changes, re-adjustment and replacement without departing from the scope of the present application. Therefore, although the above embodiments of the present application has been described in more detail, but the present application is not limited to the above examples, without departing from the concept of the present application, but also can include more other equivalent embodiments, and the scope of the present application is determined by the appended claims.

Claims

1. A dual-mode switching startup power supply system, characterized in that, include: Power module, switching module, positive output interface and negative output interface; The power module includes a main battery and a secondary battery; the positive terminals of the main battery and the secondary battery are connected to the positive output interface, and the negative terminals of the main battery and the secondary battery are connected to the negative output interface; the switching module includes at least one switching unit, which is disposed between the main battery and the secondary battery and is used to control the conduction of current.

2. The dual-mode switching startup power supply system according to claim 1, characterized in that... The main battery uses a low-rate battery pack; the auxiliary battery uses a high-rate battery pack; the main battery and the auxiliary battery are connected in parallel.

3. The dual-mode switching startup power supply system according to claim 2, characterized in that... It also includes a control module; the control module includes a main control MCU; The switching unit includes a first switching unit and a second switching unit; The first switching unit is disposed between the main battery and the negative output interface or the positive output interface, and the second switching unit is disposed between the auxiliary battery and the negative output interface or the positive output interface, respectively, for controlling the conduction and flow direction of the corresponding current; the main control MCU is connected to the first switching unit and the second switching unit respectively.

4. The dual-mode switching startup power supply system according to claim 3, characterized in that: The first switching unit includes: a first MOS transistor and a second MOS transistor; the source or drain of the first MOS transistor is connected to the drain or source of the second MOS transistor, and the turn-off directions of the first MOS transistor and the second MOS transistor are opposite. The second switching unit includes a third MOS transistor and a fourth MOS transistor; the source or drain of the third MOS transistor is connected to the drain or source of the fourth MOS transistor, and the turn-off directions of the third MOS transistor and the fourth MOS transistor are opposite.

5. A dual-mode switching startup power supply system according to claim 4, characterized in that: The main control MCU is connected to the gates of the second MOS transistor and the fourth MOS transistor, respectively.

6. A dual-mode switching startup power supply system according to claim 5, characterized in that: The first switching unit further includes a first monitoring chip; the second switching unit further includes a second monitoring chip; the first monitoring chip is connected to the gate of the first MOS transistor; and the second monitoring chip is connected to the third MOS transistor.

7. A dual-mode switching startup power supply system according to claim 6, characterized in that: The first monitoring chip is also connected to a first temperature probe; the second monitoring chip is also connected to a second temperature probe.

8. A dual-mode switching startup power supply system according to any one of claims 4 to 7, characterized in that, Also includes: A sampling module is connected to both the main battery and the main control MCU to collect the output voltage of the main battery.

9. A dual-mode switching startup power supply system according to claim 8, characterized in that: The sampling module includes a first voltage divider resistor and a second voltage divider resistor; One end of the first voltage divider resistor is connected to one end of the second voltage divider resistor, and is also connected to the main control MCU; the other end of the first voltage divider resistor is connected to the positive terminal of the main battery, and the other end of the second voltage divider resistor is grounded.

10. A mobile vehicle, characterized in that, The dual-mode switching startup power supply system described in any one of claims 1 to 9 is adopted.

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