Power supply method and power supply system

Abstract

The embodiment of the invention discloses a power connection method and a power connection system. The power-on system includes a first battery configured to supply power to the vehicle, a second battery, and a power-on power source. The power-on method comprises the steps that if a first battery of the vehicle is in a power-lack state, a power-on power source is adopted to charge the first battery; if the internal total voltage of the first battery reaches the preset first voltage, the second battery is adopted to charge the first battery, so that the problem of current impact on the first battery caused by relatively large charging current of the second battery for charging the first battery in the process of charging the first battery by the second battery can be avoided; and meanwhile, the problem of relatively long charging time caused by low-current charging of the first battery can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a jump-starting method and a jump-starting system. Background Art

[0002] Since 12V lead-acid batteries have problems such as high failure rate, low energy density, and short life, and 12V lithium batteries have advantages such as light weight, long life, and high energy density, the application of 12V lithium batteries in automobiles has gradually replaced traditional lead-acid batteries.

[0003] In the related art, the charging and discharging efficiency of 12V lithium batteries at low temperatures is low, resulting in very little charging capacity. If the vehicle is left unattended for a long time, the low-voltage battery will inevitably run out of power, causing the vehicle to be unable to start. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides a jump-charging method and a jump-charging system, which can not only avoid the problem of current shock to the first battery due to the larger output voltage of the second battery during the process of charging the first battery, but also solve the problem of long charging time of the first battery due to small current charging.

[0005] To solve the above problems, in a first aspect, the present application provides a jump-starting method, which is applied to a jump-starting system, the jump-starting system comprising a first battery, a second battery and a jump-starting power source, the first battery being configured to supply power to a vehicle; the jump-starting method comprising:

[0006] If the first battery of the vehicle is in a low-power state, charging the first battery with a jumper power source;

[0007] If the total internal pressure of the first battery reaches a preset first voltage, the second battery is used to charge the first battery.

[0008] Furthermore, in the jump-starting method provided in the present application, charging the first battery using a jump-starting power source includes:

[0009] If the jump-start power source is connected to the jump-start system, the battery management system of the first battery is awakened by hard wire;

[0010] When the battery management system is awakened, the first battery is charged using a jumper power source.

[0011] Furthermore, in the jump-starting method provided in the present application, the jump-starting system further includes a current limiting module, and the current limiting module is arranged between the jump-starting power source and the first battery;

[0012] The method of charging the first battery using a jumper power supply includes:

[0013] The current limiting module is used to adjust the output current of the jumper power supply to a preset current;

[0014] The first battery is charged with a constant current according to a preset current.

[0015] Furthermore, in the jump-starting method provided in the present application, the jump-starting system further includes a converter, and the converter is disposed between the second battery and the first battery;

[0016] Wherein, before the total internal pressure of the first battery reaches a preset first voltage, the method further includes:

[0017] The battery management system of the first battery is used to collect the internal total pressure and adjust the output voltage of the converter according to the internal total pressure.

[0018] Furthermore, in the jumper method provided in the present application, before adjusting the output voltage of the converter according to the internal total voltage, it also includes:

[0019] Use the battery management system to detect whether the converter starts normally;

[0020] If the converter starts normally, the battery management system sends a message of the internal total pressure to the converter.

[0021] Furthermore, in the jumper method provided in the present application, after adjusting the output voltage of the converter according to the internal total voltage, it also includes:

[0022] Determine the voltage difference between the internal total voltage and the output voltage;

[0023] It is determined whether the internal total pressure reaches the first voltage according to the voltage difference.

[0024] Furthermore, in the jump-charging method provided in the present application, if the total internal voltage of the first battery reaches a preset first voltage, the first battery is charged by the second battery, including:

[0025] If the voltage difference is within a preset voltage range, determining that the internal total pressure reaches a first voltage;

[0026] According to the converter, the first battery is charged using the second battery.

[0027] Furthermore, in the jump-starting method provided in the present application, the jump-starting system further includes a charge-discharge switch, the charge-discharge switch is disposed between the first battery and the second battery, and the charge-discharge switch is configured to control the charge and discharge of the first battery;

[0028] The method of charging the first battery with the second battery includes:

[0029] The battery management system is used to close the charge and discharge switch so that the second battery can charge the first battery.

[0030] In a second aspect, the present application also provides a power-up system, which includes:

[0031] a first battery, the first battery being configured to supply low voltage power to the vehicle;

[0032] a second battery, one end of the second battery being electrically connected to one end of the first battery, and the other end of the second battery being electrically connected to the other end of the first battery;

[0033] A jumper power source, wherein a first end of the jumper power source is electrically connected to one end of the first battery, and a second end of the jumper power source is electrically connected to the other end of the first battery;

[0034] Among them, when the first battery is in a low-power state, the jumper power supply is configured to charge the first battery so that the total internal pressure of the first battery is a preset first voltage; when the total internal pressure of the first battery reaches the first voltage, the second battery is configured to charge the first battery.

[0035] Further, in the jump-starting system provided in the present application, the jump-starting system further includes a current limiting module, one end of the current limiting module is electrically connected to the jump-starting power supply, the other end of the current limiting module is electrically connected to one end of the first battery, and the current limiting module is configured to adjust the output current of the jump-starting power supply to a preset current; or / and,

[0036] The jump-starting system also includes a converter, a first end of the converter is electrically connected to one end of the first battery, a second end of the converter is electrically connected to the other end of the first battery, and a third end and a fourth end of the converter are electrically connected to the two ends of the second battery respectively; the converter is configured to convert the output voltage of the second battery into the first voltage.

[0037] The jump-starting method provided in the present application is applied to a jump-starting system, which includes a first battery, a second battery and a jump-starting power supply. The first battery is configured to power a vehicle. When the first battery is in a power-deficient state, the jump-starting power supply can be used to preferentially charge the first battery, and after the total internal voltage of the first battery reaches a first voltage, the second battery can be used to charge the first battery. This can avoid the problem of current shock to the first battery due to the large charging current of the second battery during the charging of the first battery. At the same time, it can also solve the problem of a long charging time of the first battery due to low current charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic block diagram of a power-up system provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the flow of the power-up method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0043] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0044] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0045] In addition, in this application, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific implementation situation.

[0046] The embodiments of the present application provide a power-on method and a power-on system.

[0047] To facilitate understanding, the jumper system is introduced first, and then the jumper method is introduced in detail based on the jumper system.

[0048] See also Figure 1 , Figure 1 This is a schematic block diagram of a power-up system provided in an embodiment of the present application. Figure 1 As shown, the present application provides a power-on system, which includes:

[0049] A first battery 110 , the first battery 110 is configured to provide low voltage power to the vehicle;

[0050] A second battery 120, one end of the second battery 120 is electrically connected to one end of the first battery 110; the other end of the second battery 120 is electrically connected to the other end of the first battery 110;

[0051] When the first battery 110 is in a power-deficient state, the second battery 120 is configured to charge the first battery 110 .

[0052] In this embodiment, one end of the second battery 120 is electrically connected to one end of the first battery 110 to form a first terminal A; the other end of the second battery 120 is electrically connected to the other end of the first battery 110 to form a second terminal B. The first battery 110 may be a 12V low-voltage lithium battery, which may be configured to provide low-voltage power to the vehicle for starting the vehicle and providing auxiliary power to the vehicle.

[0053] Specifically, the vehicle can be divided into a low-voltage battery vehicle side and a whole vehicle side. The low-voltage battery side can be understood as the side that provides low-voltage power to the vehicle, and the whole vehicle side can be understood as the side that controls the vehicle and provides high-voltage power to the vehicle. Among them, a low-power network (LPN) can be set on the whole vehicle side of the vehicle, and the first battery 110 can provide power for the low-power network to ensure that the low-power network can control the vehicle.

[0054] The second battery 120 may be a high-voltage lithium battery, which can provide power for the vehicle. At the same time, the second battery 120 can charge the first battery 110 when the first battery 110 is in a low-power state, thereby avoiding the situation where the vehicle cannot be started and ensuring the normal use of the vehicle.

[0055] In some embodiments, Figure 1 As shown, the jump-starting system also includes a converter 130; wherein, a first end of the converter 130 is electrically connected to one end of the first battery 110, a second end of the converter 130 is electrically connected to the other end of the first battery 110, and a third end and a fourth end of the converter 130 are respectively connected to the two ends of the second battery 120; the converter 130 is configured to convert the output voltage of the second battery 120 into a preset first voltage, and the first voltage is configured as the charging voltage of the first battery 110.

[0056] Specifically, the converter 130 may be a direct current (DC / DC) converter, which may convert the output voltage of the second battery 120. The second battery 120 may be a high-voltage battery pack, which may provide power for the vehicle. The output voltage of the second battery 120 is much greater than the charging voltage of the first battery 110, and the second battery 120 cannot directly charge the first battery 110.

[0057] Therefore, the present application can set a direct current DC / DC converter between the first battery 110 and the second battery 120, the first end and the second end of the converter 130 are electrically connected to the first terminal A and the second terminal B respectively, and the third end and the fourth end of the converter 130 are the two ends of the second battery 120 respectively, so as to realize the conversion of the output voltage of the second battery 120 into the charging voltage of the first battery 110, so as to realize the charging of the first battery 110 in the power-deficient state.

[0058] In some embodiments, Figure 1 As shown, the jump-starting system also includes a current limiting module 140, one end of the current limiting module 140 is electrically connected to one end of the first battery 110, and the other end of the current limiting module 140 is electrically connected to the first terminal A; when the first battery 110 is in a low-power state, the current limiting module 140 is configured to adjust the charging current of the first battery 110 to a preset current.

[0059] Specifically, since the second battery 120 may generate a large current when charging the first battery 110 in a power-deficient state, and the first battery 110 cannot withstand the large current when it is in a severely power-deficient state, the first battery 110 is impacted. To this end, the present application may set a current limiting module 140 between the first battery 110 and the second battery 120, and then when the first battery 110 is in a power-deficient state, the current limiting module 140 may be used to limit the charging current of the first battery 110 to a preset current, and specifically, the output current of the second battery 120 may be limited to a preset current, so as to realize constant current charging of the battery in a power-deficient state. Among them, the current limiting module 140 may be a direct current DC / DC converter, which may convert the output current of the second battery 120 into direct current, and the model of the current limiting module 140 may be MPQ4232.

[0060] It can be understood that when the jump-starting system provided in the present application uses the second battery 120, the converter 130 and the current limiting module 140 to charge the first battery 110, the converter 130 can convert the output voltage of the second battery 120 and perform current conversion again through the current limiting module 140 to achieve constant current charging of the first battery 110 in a power-deficient state.

[0061] Furthermore, in some embodiments, Figure 1As shown, the jump-starting system also includes a jump-starting power supply 160; wherein the jump-starting power supply 160 is electrically connected to the first terminal A and the second terminal B respectively; when the first battery 110 is in a power-deficient state, the jump-starting power supply 160 is configured to charge the first battery 110 through the current limiting module 140 so that the total internal voltage of the first battery 110 reaches a preset second voltage.

[0062] In this embodiment, the second voltage may be the first voltage mentioned above. Specifically, when the first battery 110 is in a power-deficient state, if the second battery 120 cannot charge the first battery 110, for example, the second battery 120 is also in a power-deficient state, then the jumper power supply 160 may be connected to the first terminal A and the second terminal B, and the jumper power supply 160 may be used to perform constant current charging of the first battery 110 in a power-deficient state through a current limiting module until the total internal voltage of the first battery 110 reaches a preset second voltage.

[0063] Further, in some embodiments, when the first battery is in a power-deficient state and the total internal voltage of the first battery is greater than or equal to a second voltage, the second battery is configured to charge the first battery.

[0064] Specifically, when the second battery 120 uses the converter 130 and the current limiting module 140 to charge the first battery 110 in a power-deficient state, the charging current of the first battery 110 may be 2A, and the charging current of 2A will cause the first battery 110 to take a long time to be fully charged. Similarly, the jump power supply 160 can use the current limiting module to perform constant current charging on the first battery 110 in a power-deficient state, and at this time, the charging current of the first battery 110 may be 2A, causing the first battery 110 to take a long time to be fully charged.

[0065] In order to shorten the charging time of the first battery 110 in a low-power state, the present application can first use the jumper power supply 160 and the current limiting module 140 to perform constant-current charging on the first battery 110 until the total internal voltage of the first battery 110 reaches a preset second voltage, and then use the second battery 120 and the converter 130 to perform constant-voltage charging on the first battery at this time to shorten the charging time of the first battery 110 until the first battery 110 is fully charged.

[0066] The jump power source 160 can be provided by a jump power bank, which can provide a 9V to 16V DC power source, similar to a power bank used to charge a mobile phone. At the same time, the jump power source 160 can also be a 220V AC power source, which can be converted by the current limiting module 140 to realize charging the first battery 110 with a preset current.

[0067] It should be noted that the first battery mentioned in the present application can be understood as a low-voltage battery pack, and the total internal pressure of the first battery can be understood as the sum of the voltages of all the battery cells in the first battery.

[0068] Furthermore, in some embodiments, Figure 1 As shown, the jump-starting system is also provided with a charge and discharge switch 150, one end of the charge and discharge switch 150 is electrically connected to one end of the first battery 110 and one end of the current limiting module 140, and the other end of the charge and discharge switch 150 is electrically connected to the second terminal B; when the charge and discharge switch 150 is disconnected, the jump-starting power supply 160 is configured to charge the first battery 110 through the current limiting module 140; when the charge and discharge switch is closed, the second battery 120 is configured to charge the first battery 110 through the charge and discharge switch.

[0069] In this embodiment, the charge and discharge switch 150 is a switch for charging and discharging the first battery 110, which can be a MOS tube. When the first battery 110 is in a low-power state, if the jumper power supply 160 is used to charge the first battery 110, the charge and discharge switch 150 is in a disconnected state; if the second battery 120 is used to charge the first battery 110, the current limiting module 140 exits the current limiting mode, and the charge and discharge switch 150 is closed, the converter 130 can convert the output voltage of the second battery 120 into the charging voltage of the first battery 110, and directly charge the first battery 110 through the charge and discharge switch 150, thereby avoiding the impact of the first battery 110 due to the large current.

[0070] In some embodiments, the jump-start system further includes a battery management system configured to manage the first battery 110 .

[0071] In this embodiment, the battery management system can collect and manage the voltage, current and temperature of the first battery 110, and can also control the on and off of the battery-side charge and discharge switch 150. The first battery 110 and the battery management system can form a low-voltage battery pack.

[0072] Furthermore, in some embodiments, the battery management system is also configured to establish a communication connection with the second battery 120 .

[0073] In this embodiment, the battery management system can use the CAN network to communicate with the second battery 120, the converter 130 and the current limiting module 140 respectively, and then when the first battery 110 is in a low-power state, the jumper power supply 160, the converter 130, the current limiting module 140 and the second battery 120 can be used to complete the charging of the first battery 110 in a shorter time without generating current shock to the first battery 110.

[0074] Further, in some embodiments, when the first battery 110 is in a low-power state, the battery management system is configured to be in a dormant state, or when the first battery 110 is in a low-power state, the battery management system is configured to be in an active state.

[0075] In this embodiment, when the first battery 110 is in a low-power state, the battery management system of the first battery 110 can be configured to be in a dormant state. When the low-power first battery needs to be recharged, the battery management system of the first battery needs to be awakened, and after the battery management system of the first battery is awakened, the second battery 120 and / or the jumper power supply are used to recharge the first battery 110.

[0076] When the first battery 110 is in a low-power state, the battery management system of the first battery 110 can be configured to be in a working state. When the low-power first battery needs to be recharged, the battery management system of the first battery can be put into sleep mode first, and then awakened, and after the battery management system of the first battery is awakened, the second battery 120 and / or the jumper power supply can be used to recharge the first battery 110.

[0077] When the first battery 110 is in a low-power state, the battery management system of the first battery 110 can be configured to be in a working state. When the low-power first battery needs to be recharged, the second battery 120 or / and the jumper power supply can be directly used to recharge the first battery 110.

[0078] In some embodiments, the jumper power source 160 is electrically connected to the first terminal A through a first jumper clip, and is electrically connected to the second terminal B through the first jumper clip.

[0079] Specifically, the battery management system of the first battery provided in the present application is also configured to detect whether there is any looseness between the first jumper clip and the first terminal A, and between the second jumper clip and the second terminal B, thereby achieving timely detection of jumper failure caused by loose jumper clips, thereby improving the reliability of the jumper system.

[0080] It can be understood that the jumper system provided in the above embodiment is only an example. The jumper system described in the embodiment of the present application is to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. It is known to those skilled in the art that with the evolution of the system and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. The following are detailed descriptions.

[0081] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments. The following is a detailed description of the jumper method.

[0082] In the related art, when the vehicle's 12V low-voltage lithium battery (first battery) runs out of power, the vehicle's high-voltage battery pack (second battery) is usually used to charge the 12V low-voltage lithium battery. However, when the output voltage of the high-voltage battery pack is converted by the converter into the charging voltage of the first battery, the charging current output by the converter is large, which will have an impact on the first battery and further damage the first battery. Therefore, a current limiting module is set between the converter and the first battery. However, after the current limiting module is added, it takes several hours to complete the charging of the first battery, which cannot meet the vehicle safety redundancy requirements.

[0083] To this end, the present application provides a jumpering method, which can not only avoid the problem of current shock to the first battery caused by the large charging current of the second battery when the second battery is charging the first battery, but also solve the problem of long charging time of the first battery due to small current charging.

[0084] See also Figure 2 , Figure 2 The figure is a flow chart of the method for connecting a power source provided in the embodiment of the present application. Figure 2 As shown, the present application provides a jump-starting method, which is applied to a jump-starting system, the jump-starting system includes a first battery, a second battery and a jump-starting power source, and the first battery is configured to power a vehicle. Specifically, as Figure 2 As shown, the jumper method includes steps S110 and S120.

[0085] S110: If the first battery of the vehicle is in a low-power state, charge the first battery using a jumper power source.

[0086] In this embodiment, the jump-start power supply can be provided by a jump-start power bank, which can provide a 9V to 16V DC power supply, and the jump-start power bank is similar to a power bank used to charge a mobile phone. At the same time, the jump-start power supply can also be a 220V AC power supply, which can be converted by a current limiting module to achieve constant current charging of the first battery using a preset current.

[0087] It should be noted that when the jump power supply is used to charge the first battery with a constant current, a current limiting module may not be provided between the jump power supply and the first battery, and the output power of the jump power supply only needs to be a preset current, wherein the preset current may be 2A.

[0088] In some embodiments, step S110 includes the steps of: if the jump-start power source is connected to the jump-start system, hard-wire waking up the battery management system of the first battery; and charging the first battery using the jump-start power source when the battery management system is awakened.

[0089] In this embodiment, when the first battery is in a low-power state, the battery management system of the first battery is in a dormant state. If a jump power supply is used to charge the first battery with a constant current, when the jump power supply is connected to the first terminal and the second terminal, the battery management system of the first battery is awakened due to the voltage change at the second terminal, and then after the battery management system of the first battery is awakened, the jump power supply can be used to charge the first battery with a constant current, thereby ensuring that the battery management system can monitor and manage the first battery in a charging state. The first terminal is grounded, and the second terminal is electrically connected to the other end of the first battery.

[0090] In some embodiments, the jump-starting system further includes a current limiting module, which is disposed between the jump-starting power source and the first battery; step S110 further includes the steps of: using the current limiting module to adjust the output current of the jump-starting power source to a preset current; and performing constant current charging on the first battery according to the preset current.

[0091] In this embodiment, one end of the current limiting module is electrically connected to the first end of the jumper power supply, and the other end of the current limiting module is electrically connected to one end of the first battery. The current limiting module is configured to adjust the output current of the jumper power supply to a preset current.

[0092] Specifically, the current limiting module can be connected to the battery management system of the first battery for communication. When the battery management system of the first battery is awakened by the access of the jump power supply, the current limiting module can be communicated and controlled to convert the output current of the jump power supply into a preset current, so as to realize constant current charging of the first battery in a power-deficient state with the preset current. The current limiting module is actually also a converter, but the converter is configured to perform DC conversion.

[0093] S120: If the total internal pressure of the first battery reaches a preset first voltage, the second battery is used to charge the first battery.

[0094] Specifically, during the process of the jump power supply charging the first battery in a power-deficient state, the battery management system of the first battery is in an awakened state, so the battery management system of the first battery can monitor the internal total voltage of the first battery, and then after monitoring that the internal total voltage of the first battery reaches a preset first voltage, the second battery can be controlled to charge the first battery. At this time, the charging current of the second battery to the first battery will not have an impact on the first battery, so the charging speed of the first battery can be accelerated, the charging time of the first battery can be reduced, and the charging efficiency of the first battery can be improved.

[0095] The internal total pressure refers to the sum of the voltages of all cells in the first battery, and the internal total pressure can reflect the overall state of the first battery. In a lithium battery, the cells are usually connected in series, so the total pressure is the accumulation of the voltages of each cell.

[0096] In some embodiments, the jump-starting system further includes a converter, which is disposed between the second battery and the first battery; before step S120, it further includes the step of using the battery management system of the first battery to collect the internal total pressure, and adjusting the output voltage of the converter according to the internal total pressure.

[0097] Specifically, the converter may be a direct current (DC / DC) converter, which may convert the output voltage of the second battery into a charging voltage of the first battery. A first end of the converter is electrically connected to one end of the first battery, a second end of the converter is electrically connected to the other end of the first battery, a third end of the converter is electrically connected to the first terminal, and the other end of the converter is electrically connected to the second terminal; the converter is configured to convert the output voltage of the second battery into a preset first voltage.

[0098] In this embodiment, when the jump power source is connected to the first terminal and the second terminal, the converter can be started, and after the converter completes normal startup, a communication connection can be established with the battery management system of the first battery. At the same time, when the jump power source is performing constant current charging on the first battery, the battery management system of the first battery can detect the internal total pressure of the first battery and feed back the detected internal total pressure to the converter, so that the converter can adjust its output voltage to quickly charge the first battery.

[0099] Furthermore, in some embodiments, before adjusting the output voltage of the converter according to the internal total pressure, the method further includes: using a battery management system to detect whether the converter starts normally; if the converter starts normally, the battery management system sends a message of the internal total pressure to the converter.

[0100] In this embodiment, after the converter completes normal startup, the battery management system of the first battery can actively communicate with the converter to detect whether the converter is started normally. If the battery management system of the first battery detects that the converter is started normally, the monitored internal total pressure of the first battery can be sent to the converter in the form of a message. After receiving the message, the converter can adjust the output voltage of the converter according to the internal total pressure of the first battery to achieve rapid charging of the first battery without generating current shock to the first battery.

[0101] Furthermore, in some embodiments, after adjusting the output voltage of the converter according to the internal total voltage, the steps of: determining a voltage difference between the internal total voltage and the output voltage; and determining whether the internal total voltage reaches the first voltage according to the voltage difference.

[0102] In this embodiment, after the converter adjusts its output voltage according to the internal total voltage of the first battery, the adjusted output voltage can be fed back to the battery management system of the first battery. After the battery management system of the first battery receives the feedback from the converter, it can determine the voltage difference between the internal total voltage and the output voltage according to the internal total voltage and the output voltage, and then determine whether the internal total voltage of the first battery reaches the first voltage according to the voltage difference, so that the second battery can be used to quickly charge the first battery.

[0103] In some embodiments, step S120 includes the steps of: if the voltage difference is within a preset voltage range, determining that the internal total voltage reaches a first voltage; and charging the first battery with a second battery according to a converter.

[0104] In this embodiment, the voltage range can be preset, and it can be between -0.6 V and 0.6 V. When the voltage difference is within the preset voltage range, the current limiting module can be controlled to exit the current limiting mode, and the second battery is used to quickly charge the first battery through the converter to shorten the charging time of the first battery in the power-deficient state, thereby improving the charging efficiency of the first battery.

[0105] In some embodiments, the jump-starting system further includes a charge and discharge switch, which is disposed between the first battery and the second battery, and is configured to control the charge and discharge of the first battery; step S120 includes the step of: using a battery management system to close the charge and discharge switch to enable the second battery to charge the first battery.

[0106] In this embodiment, the charge and discharge switch is connected in parallel with the current limiting module. When the jump power supply is used to charge the first battery in the power-deficient state, the charge and discharge switch is in the disconnected state, and the jump power supply charges the first battery through the current limiting module. At this time, the converter is in the normal startup state; when the converter completes the normal startup and can charge the first battery, the battery management system of the first battery can control the charge and discharge switch to close, and control the current limiting module to exit the current limiting mode. At this time, the second battery can pass through the converter and the charge and discharge switch to quickly charge the first battery without generating current shock to the first battery, thereby improving the charging efficiency of the first battery.

[0107] The jump-starting method provided by the present application, when the first battery is in a power-deficient state, the jump-starting power supply is configured to charge the first battery so that the internal total voltage of the first battery is a preset first voltage; when the internal total voltage of the first battery reaches the first voltage, the second battery is configured to charge the first battery of the second voltage, thereby avoiding the problem of current shock to the first battery due to the large charging current of the second battery charging the first battery during the process of charging the first battery by the second battery, and also solving the problem of long charging time of the first battery due to small current charging.

[0108] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for connecting electricity, characterized in that: The invention is applied to a jump-starting system, the jump-starting system comprises a first battery, a second battery and a jump-starting power source, the first battery is configured to supply power to a vehicle; the method comprises: If the first battery of the vehicle is in a low-power state, charging the first battery with the jump-start power supply; If the total internal pressure of the first battery reaches a preset first voltage, the second battery is used to charge the first battery.

2. The method for connecting a power source according to claim 1, characterized in that: The step of charging the first battery using the jump power supply comprises: If the jump-start power source is connected to the jump-start system, the battery management system of the first battery is awakened by hard wire; When the battery management system is awakened, the jump power source is used to charge the first battery.

3. The method for connecting a power source according to claim 1 or 2, characterized in that: The jump-starting system further includes a current limiting module, which is disposed between the jump-starting power source and the first battery; The step of charging the first battery using the jump power supply includes: The current limiting module is used to adjust the output current of the jump power supply to a preset current; The first battery is charged with a constant current according to the preset current.

4. The method for connecting a power source according to claim 1, characterized in that: The jump-start system further includes a converter, which is disposed between the second battery and the first battery; Wherein, before the total internal pressure of the first battery reaches a preset first voltage, the method further includes: The battery management system of the first battery is used to collect the internal total pressure, and adjust the output voltage of the converter according to the internal total pressure.

5. The method for connecting a power source according to claim 4, characterized in that: Before adjusting the output voltage of the converter according to the internal total pressure, the method further includes: Using the battery management system to detect whether the converter is started normally; If the converter starts normally, the battery management system sends a message of the internal total pressure to the converter.

6. The method for connecting a power source according to claim 4, characterized in that: After adjusting the output voltage of the converter according to the internal total pressure, the method further includes: determining a voltage difference between the internal total pressure and the output voltage; It is determined whether the internal total pressure reaches the first voltage according to the voltage difference.

7. The method for connecting a power source according to claim 6, characterized in that: If the total internal pressure of the first battery reaches a preset first voltage, charging the first battery with the second battery comprises: If the voltage difference is within a preset voltage range, determining that the internal total pressure reaches the first voltage; According to the converter, the first battery is charged by the second battery.

8. The method for connecting a power source according to claim 1, characterized in that: The jump-start system further includes a charge-discharge switch, which is disposed between the first battery and the second battery, and is configured to control the charge and discharge of the first battery; The step of charging the first battery using the second battery includes: The battery management system is used to close the charge and discharge switch so that the second battery charges the first battery.

9. A power-up system, characterized in that: include: a first battery configured to supply low voltage power to the vehicle; a second battery, one end of the second battery being electrically connected to one end of the first battery, and the other end of the second battery being electrically connected to the other end of the first battery; A jumper power source, wherein a first end of the jumper power source is electrically connected to one end of the first battery, and a second end of the jumper power source is electrically connected to the other end of the first battery; Among them, when the first battery is in a low-power state, the jump-start power supply is configured to charge the first battery so that the total internal pressure of the first battery is a preset first voltage; when the total internal pressure of the first battery reaches the first voltage, the second battery is configured to charge the first battery.

10. The jump-start system according to claim 9, characterized in that: The jump-starting system further includes a current limiting module, one end of which is electrically connected to the jump-starting power source, and the other end of which is electrically connected to one end of the first battery, and the current limiting module is configured to adjust the output current of the jump-starting power source to a preset current; or / and, The jump-starting system also includes a converter, a first end of the converter is electrically connected to one end of the first battery, a second end of the converter is electrically connected to the other end of the first battery, and a third end and a fourth end of the converter are electrically connected to the two ends of the second battery respectively; the converter is configured to convert the output voltage of the second battery into the first voltage.

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