Power supply method and power supply system

Abstract

The embodiment of the invention discloses a power connection method and a power connection system. According to the method, the external total voltage and the internal total voltage of the first battery can be obtained by detecting the power supply signal of the power supply, and the first battery is charged according to the external total voltage and the internal total voltage of the first battery, so that the problem that the battery management system of the first battery is continuously awakened when the first battery is lack of power is solved. And therefore, the stability and the reliability of the power connection system can be greatly improved.

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-starting method and a jump-starting system, which can jump-start the battery when the battery is low on power and the battery management system is in working condition, thereby improving the stability and reliability of the jump-starting system.

[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; when the first battery is in a low-power state, a battery management system of the first battery is configured to be in a working state; the method comprises:

[0006] When the first battery is in a power-deficient state, if a power signal of the jumper power source is detected, obtaining the external total pressure and the internal total pressure of the first battery;

[0007] The first battery is charged according to the external total pressure and the internal total pressure.

[0008] Furthermore, in the jump-charging method provided in the present application, charging the first battery according to the external total pressure and the internal total pressure includes:

[0009] determining whether the external total voltage of the first battery is within a preset voltage range;

[0010] If the external total pressure of the first battery is within a preset voltage range, the first battery is charged according to the external total pressure and the internal total pressure.

[0011] Furthermore, in the jump-charging method provided in the present application, charging the first battery according to the external total pressure and the internal total pressure includes:

[0012] Acquiring on / off information of a charge / discharge switch of a first battery;

[0013] If the on-off information is the preset first information, the first battery is charged according to the external total pressure and the internal total pressure.

[0014] Furthermore, in the jump-starting method provided in the present application, charging the first battery according to the external total pressure and the internal total pressure includes:

[0015] Determine whether the external total pressure is greater than the internal total pressure;

[0016] If the external total pressure is greater than the internal total pressure, a preset current limiting module is used to adjust the charging current of the first battery to a preset current, so as to perform constant current charging on the first battery.

[0017] Furthermore, in the jumper method provided in the present application, before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes:

[0018] Get the identification information of the current limiting module;

[0019] If the identification information is the preset second information, the current limiting module is started.

[0020] Furthermore, in the jumper method provided in the present application, before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes:

[0021] Obtaining the voltage difference between the external total pressure and the internal total pressure;

[0022] If the voltage difference is less than the preset first voltage, the current limiting module is started.

[0023] Furthermore, in the jumper method provided in the present application, before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes:

[0024] Acquire status information of a first battery;

[0025] If the status information is the preset third information, the current limiting module is started.

[0026] Furthermore, in the jump-starting method provided in the present application, after obtaining the status information of the first battery, the method further includes:

[0027] If the state information is the preset fourth information, obtaining the closing condition of the charge and discharge switch;

[0028] If the closing condition is the preset fifth information, the charge and discharge switch is closed, and the preset second battery is used to charge the first battery.

[0029] Furthermore, in the jumper method provided in the present application, after obtaining the closing condition of the charge and discharge switch, it also includes:

[0030] If the closing condition is the preset sixth information, the battery management system is configured to enter a dormant state after the preset first time.

[0031] In a second aspect, the present application also provides a power-up system, which includes:

[0032] a first battery, the first battery being configured to supply low voltage power to the vehicle;

[0033] 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;

[0034] When the first battery is in a power-deficient state, the battery management system of the first battery is configured to be in a working state, and the second battery is configured to charge the first battery.

[0035] The jump-starting method provided in the present application can obtain the external total pressure and the internal total pressure of the first battery by detecting the power signal of the jump-starting power supply, and charge the first battery according to the external total pressure and the internal total pressure of the first battery, thereby solving the problem that the first battery cannot be jump-started when the first battery is low on power and the battery management system of the first battery is in working state, and greatly improving the stability and reliability of the jump-starting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A schematic block diagram of a power-up system provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the flow of the power-up method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The embodiments of the present application provide a power-on method and a power-on system.

[0045] For ease of understanding, the jumper system is introduced first, and then the jumper method is introduced in detail based on the jumper system.

[0046] 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:

[0047] A first battery 110 , the first battery 110 is configured to provide low voltage power to the vehicle;

[0048] 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;

[0049] When the first battery 110 is in a power-deficient state, the second battery 120 is configured to charge the first battery 110 .

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Furthermore, in some embodiments, Figure 1 As 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Furthermore, in some embodiments, Figure 1As 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.

[0067] 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.

[0068] In some embodiments, the jump-start system further includes a battery management system configured to manage the first battery 110 .

[0069] 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.

[0070] Furthermore, in some embodiments, the battery management system is also configured to establish a communication connection with the second battery 120 .

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] In the related art, when the first battery is in a low-power state, the battery management system of the first battery controls the charge and discharge switch of the first battery to be disconnected and enter a dormant state. The jump-start method of the first battery is usually that after the first battery is low-power and the battery network of the first battery is in a dormant state, it is necessary to first wake up the battery management system according to the new signal of the connected power supply to jump-start the first battery. However, when the first battery is used in a vehicle, the battery equipment of the vehicle may continue to wake up the network through the bus, thereby making the battery management system of the first battery in a working state. At this time, if the second battery or jump-start power supply is connected, there will be no step of waking up the battery management system of the first battery, which will cause the battery management system to be unable to manage the charging status of the first battery, resulting in the inability to jump-start the first battery.

[0081] To this end, the present application provides a jump-charging method, which can obtain the external total pressure and the internal total pressure of the first battery by detecting the power signal of the jump-charging power supply, and charge the first battery according to the external total pressure and the internal total pressure of the first battery, thereby solving the problem that the first battery cannot be jump-charged when the first battery is low on power and the battery management system of the first battery is in a working state, thereby greatly improving the stability and reliability of the jump-charging system.

[0082] See also Figure 2 , Figure 2 The figure is a flow chart of the method for connecting a power supply provided in the embodiment of the present application. Figure 2 As shown, the present application provides a power-on method, which includes steps S110 and S120.

[0083] S110, when the first battery is in a low-power state, if a power signal of the jumper power source is detected, obtaining an external total pressure and an internal total pressure of the first battery;

[0084] S120: charging the first battery according to the external total pressure and the internal total pressure.

[0085] When the first battery is low on power, the charge and discharge switch of the first battery is in a disconnected state, causing the first battery to be unable to continuously supply low voltage power to the vehicle. However, when the first battery is used in a vehicle, the vehicle's own battery device may continuously wake up the network through the bus, thereby making the battery management system of the first battery in a working state, but the first battery cannot continuously provide power to the battery management system because the charge and discharge switch is disconnected. Therefore, it is necessary to charge the first battery in a low-power state.

[0086] In this embodiment, when the first battery is low on power and the battery management system of the first battery is continuously awakened by the battery device of the vehicle, if the access of the jump-start power supply is detected, that is, the power signal of the jump-start power supply is identified, the battery management system can obtain the external total pressure and the internal total pressure of the first battery, and charge the first battery according to the external total pressure and the internal total pressure. Among them, the external total pressure of the first battery can be understood as the voltage between the first terminal and the second terminal of the vehicle, and the external total pressure of the first battery can be understood as the total voltage of each battery cell in the first battery. When the external total pressure is close to the internal total pressure, the jump-start power supply can be used to charge the first battery directly to realize jump-starting the first battery. It should be noted that the jump-start power supply at this time can be understood as the power supply of the second battery provided in this application, and can also be understood as the power supply of the jump-start system provided by itself.

[0087] In some embodiments, step S120 includes: determining whether the external total pressure of the first battery is within a preset voltage range; if the external total pressure of the first battery is within the preset voltage range, charging the first battery according to the external total pressure and the internal total pressure.

[0088] In this embodiment, the external total pressure of the first battery can be understood as the output voltage of the jumper power supply. If the output voltage of the connected jumper power supply is too large, for example, the second power supply is used to directly charge the battery in the power-off state, the charging voltage of the first battery will be too high, which will not only damage the electrical and mechanical properties of the first battery, but also may cause safety problems such as heating or leakage. Therefore, after obtaining the external total pressure and internal total pressure of the first battery, the present application also needs to determine whether the external total pressure of the first battery is within a preset voltage range, and the voltage range can be between 9V and 17.5V. If the external total pressure of the first battery is within the voltage range, it can be judged whether the external total pressure is close to the internal total pressure. If so, the jumper power supply can be used to charge the first battery. Among them, the voltage range can be set according to the internal total pressure after the first battery is power-off.

[0089] In some embodiments, step S120 includes: obtaining on-off information of a charge and discharge switch of the first battery; if the on-off information is preset first information, charging the first battery according to the external total pressure and the internal total pressure.

[0090] In this embodiment, a current limiting module is provided between the first battery and the second terminal. The purpose of the current limiting module is to adjust the output current of the jumper power supply to a preset current to prevent the first battery from being subjected to current shock. At the same time, the current limiting module is electrically connected to the charge and discharge switch in parallel. In order to improve the charging efficiency of the first battery, the present application also uses a second battery on the vehicle, i.e., a high-voltage battery, to charge the first battery.

[0091] Specifically, when the first battery is in a power-deficient state, the jumper 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 a fourth voltage, the second battery is configured to charge the first battery of the fourth voltage, thereby avoiding the problem of current shock to the first battery caused by the large charging current of the second battery when the second battery charges the first battery, and also solving the problem of a long charging time of the first battery due to low current charging. Among them, the first information can be the disconnection information of the charge and discharge switch, which can be determined by whether the main control board of the battery management system of the first battery sends instruction information to the charge and discharge switch to control the closing of the charge and discharge switch.

[0092] Furthermore, when the jump power supply is used to charge the first battery, it is necessary to ensure that the charge and discharge switch is in the disconnected state; when the second battery is used to charge the first battery, the current limiting module needs to exit the current limiting mode, and the charge and discharge switch needs to be in the closed state, thereby ensuring that the first battery can be quickly fully charged. Therefore, if the jump power supply is used to charge the first battery with a constant current, it is necessary to determine whether the charge and discharge switch of the first battery is in the disconnected state. If the on-off information of the charge and discharge switch shows that the charge and discharge switch is disconnected, and the external total pressure is close to the internal total pressure, the current limiting module can be started at this time to convert the output current of the jump power supply into a preset current to avoid the first battery from being subjected to current shock.

[0093] In some embodiments, step S120 includes: determining whether the external total pressure is greater than the internal total pressure; if the external total pressure is greater than the internal total pressure, using a preset current limiting module to adjust the charging current of the first battery to a preset current to perform constant current charging on the first battery.

[0094] In this embodiment, after determining that the charge and discharge switch is in the off state and before starting the current limiting module, it is also necessary to determine whether the external total pressure of the first battery is greater than the internal total pressure. If the external total pressure is greater than the internal total pressure, the current limiting module can be started at this time, and then the current limiting module can be used to adjust the charging current of the first battery to a preset current to perform constant current charging on the first battery.

[0095] In some embodiments, before using a preset current limiting module to adjust the charging current of the first battery to a preset current to perform constant current charging on the first battery, it also includes: obtaining identification information of the current limiting module; if the identification information is preset second information, starting the current limiting module.

[0096] Specifically, in the process of starting the current limiting module, the battery management system also needs to confirm whether the first battery prohibits the current limiting module from limiting current. For example, when the first battery is not seriously depleted, the second battery can actually be used to charge the first battery directly. However, at this time, the jump power supply is connected, so the jump power supply does not need to limit current, and can directly charge the first battery through the charge and discharge switch, so that the first battery can achieve the purpose of fast charging. Among them, the second information can be understood as data information that the first battery can use the current limiting module to limit current. For example, when the current limiting module is a buck-boost converter of the MPQ4232 model, it has an ALT pin, and the ALT pin is electrically connected to the main control board. When the current limiting module is required to limit the charging current of the first battery, if the ALT pin does not send an alarm message to the main control board, it can be determined that the first battery can use the current limiting module to limit current, and the battery management system can start the current limiting module.

[0097] In some embodiments, before using a preset current limiting module to adjust the charging current of the first battery to a preset current to perform constant current charging on the first battery, it also includes: obtaining the voltage difference between the external total pressure and the internal total pressure; if the voltage difference is less than the preset first voltage, starting the current limiting module.

[0098] Specifically, after determining that the charge and discharge switch is in the off state and before starting the current limiting module, if it is determined that the external total pressure is greater than the internal total pressure, in order to ensure that the preset current converted by the current limiting module will not impact the first battery, the voltage difference between the external total pressure and the internal total pressure must be less than the preset first voltage, and then the current limiting module can be started after the voltage difference is less than the preset first voltage to ensure that the current limiting module can continuously convert the output current of the jump power supply into the preset current, thereby realizing constant current charging of the first battery. The first voltage can be 0.6V.

[0099] In some embodiments, before using a preset current limiting module to adjust the charging current of the first battery to a preset current to perform constant current charging on the first battery, the method further includes: obtaining status information of the first battery; if the status information is preset third information, starting the current limiting module.

[0100] Specifically, after an undervoltage fault occurs in the first battery, the outside world may mistakenly believe that the first battery is in a low-power state, and then the battery management system needs to start the current limiting module to charge the first battery. Therefore, in the process of starting the current limiting module, the battery management system also needs to obtain the status information of the first battery and confirm whether the status information is the preset third information. If the status information is the preset third information, it can be confirmed that the first battery is in a low-power state, and then the battery management system can be used to start the current limiting module. Among them, the third information can be understood as the voltage, current and other information of the first battery collected by the battery management system. Since the battery management system can collect and manage the voltage, current and temperature of the first battery, after the battery management system is awakened, it can collect and identify the voltage or current of the first battery again to determine whether the first battery is in a low-power state.

[0101] In some embodiments, after obtaining the status information of the first battery, it also includes: if the status information is the preset fourth information, obtaining the closing condition of the charge and discharge switch; if the closing condition is the preset fifth information, closing the charge and discharge switch, and using the preset second battery to charge the first battery.

[0102] In this embodiment, the fourth information can be understood as data information prohibiting the use of the current limiting module, which can also be determined by the ALT pin of the current limiting module. If the first battery shows that the current limiting module is prohibited from being used for current limiting, the jumper power supply may not be used to charge the first battery at this time, and the external total voltage of the first battery may be the voltage output by the converter at the first battery. For this reason, the present application also needs to further determine whether the second battery can be used to charge the first battery to avoid current shock during the charging process of the first battery.

[0103] In the process of determining whether the second battery can be used to charge the first battery, the closing condition of the charge-discharge switch can be obtained, specifically, the voltage difference between the external total pressure and the internal total pressure can be obtained, and it can be determined whether the voltage difference is less than the preset first voltage. If the voltage difference is less than the preset first voltage, the charge-discharge switch can be controlled to close, and the second battery can be used to charge the first battery to speed up the charging efficiency of the first battery. Among them, the fifth information can be understood as the voltage difference is less than the preset first voltage.

[0104] In some embodiments, after acquiring the closing condition of the charge and discharge switch, it also includes: if the closing condition is a preset sixth information, after a preset first time, the battery management system is configured to enter a sleep state.

[0105] In this embodiment, the sixth information can be understood as the voltage difference being greater than or equal to the preset first voltage. If the second battery is directly used to charge the first battery, the first battery will be subjected to a current shock. Therefore, the battery management system needs to obtain the external total pressure and the internal total pressure of the first battery again after the preset first time, and determine whether the first battery needs to be charged based on the external total pressure and the internal total pressure. If the charging condition of the first battery is still not met after the first time, the battery management system can be configured to enter a dormant state.

[0106] The jump-charging method provided in the present application can obtain the external total pressure and the internal total pressure of the first battery by detecting the power signal of the jump-charging power source when the first battery is low on power and the battery management system of the first battery is continuously awakened, and charge the first battery according to the external total pressure and the internal total pressure of the first battery, thereby solving the problem that the first battery cannot be jump-charged when the first battery is low on power and the battery management system of the first battery is continuously awakened, and greatly improving the stability and reliability of the jump-charging system.

[0107] In some embodiments, during the charging process of the first battery, first communication information between the current limiting module and the battery management system of the first battery can also be obtained. If the first communication information is the preset seventh information, second communication information between the current limiting module and the battery management system of the first battery is obtained after the preset first time; if the second communication information is the seventh information, information on the electrical connection disconnection between the jumper and the current limiting module is generated.

[0108] In this embodiment, after the current limiting module is started, it can communicate and connect with the battery management system of the first battery. Then, when the first battery is charged with a preset current for constant current, the battery management system can obtain the first communication information between the current limiting module and the current limiting module. Specifically, it can detect the communication connection signal sent by the current limiting module to the battery management system, so that the battery management system can control the current limiting module to convert the output current of the jump power supply, so that the first battery is charged with a preset current for constant current.

[0109] At the same time, the jump-on power supply can be provided by a jump-on power bank, which can provide a 9V to 16V DC power supply, and the jump-on power bank is similar to a power bank used to charge a mobile phone. At the same time, the jump-on 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.

[0110] 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.

[0111] The seventh information can be understood as information that the jumper clip is disconnected from the terminal on the vehicle. When the first communication information is the seventh information, it can be confirmed that the jumper clip is loose at the terminal on the vehicle, but the reason for the looseness may be due to the shaking during the jumper process, and the jumper clip may be reconnected to the terminal on the vehicle after a certain period of time. Therefore, in order to further confirm that the jumper clip is disconnected from the terminal on the vehicle, and at the same time to confirm whether the disconnection between the jumper clip and the terminal on the vehicle is caused by looseness, the present application can obtain the second communication information between the current limiting module and the battery management system of the first battery after a preset first time. If the second communication information is still the seventh information, it can be confirmed that the jumper clip is disconnected from the terminal on the vehicle, and the jumper clip falls off during the jumper process.

[0112] Specifically, if the second communication information is still the seventh information, it can be confirmed that the jumper clip is disconnected from the terminal on the vehicle. At this time, the electrical connection disconnection information between the jumper connector and the current limiting module can be generated, and the outside world can be promptly prompted that the jumper clip is disconnected from the terminal on the vehicle, so as to facilitate timely processing, thereby ensuring the reliability of the jumper system.

[0113] Among them, the seventh information can be data information sent by the current limiting module to the main control board of the battery management system of the first battery. For example, when the current limiting module is a buck-boost converter of the MPQ4232 model, it has pins SDA and VIN, pin VIN is electrically connected to the jump power supply through the second terminal, pin SDA is electrically connected to the main control board, and communicates with the main control board. When the main control board does not receive the data information sent by pin SDA, it can be determined that there is looseness between the jump power supply and the first terminal, or / and between the jump power supply and the second terminal.

[0114] In some embodiments, before obtaining the first communication information between the current limiting module and the battery management system of the first battery, it also includes: when the first battery is in a low-power state, if the power signal of the jump-on power supply is detected, a rising edge signal is generated; the battery management system is awakened according to the rising edge signal, and the current limiting module is started by the battery management system; according to the started current limiting module, the output current of the jump-on power supply is adjusted to a preset current to charge the first battery.

[0115] 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. When the jump-start power supply is connected, the power signal provided by the jump-start power supply can wake up the battery management system in the dormant state. However, after the jump-start power supply completes charging the first battery, the battery management system needs to be dormant, and at this time the jump-start power supply is still electrically connected to the first battery, resulting in the battery management system being unable to be powered off and enter the dormant state.

[0116] To this end, when waking up the battery management system, the present application uses a wake-up signal that needs to be designed as a rising edge signal, and then after detecting the power signal of the jump power source, a rising edge signal can be generated, and the battery management system can be woken up according to the rising edge signal. After the battery management system is awakened, the current limiting module can be started through the battery management system to adjust the output current of the jump power source to a preset current, and then the preset current can be used to perform constant current charging on the first battery.

[0117] 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 comprising: a first battery; when the first battery is in a low-power state, a battery management system of the first battery is configured to be in a working state; the method comprising: When the first battery is in a low-power state, if a power signal of a jumper power source is detected, obtaining an external total pressure and an internal total pressure of the first battery; The first battery is charged according to the external total pressure and the internal total pressure.

2. The method for connecting a power source according to claim 1, characterized in that: The charging the first battery according to the external total pressure and the internal total pressure includes: determining whether the external total voltage of the first battery is within a preset voltage range; If the external total pressure of the first battery is within a preset voltage range, the first battery is charged according to the external total pressure and the internal total pressure.

3. The method for connecting a power source according to claim 1, characterized in that: The charging the first battery according to the external total pressure and the internal total pressure includes: Acquiring on / off information of a charge / discharge switch of the first battery; If the on-off information is preset first information, the first battery is charged according to the external total pressure and the internal total pressure.

4. The method for connecting a power source according to claim 3, characterized in that: The charging the first battery according to the external total pressure and the internal total pressure includes: determining whether the external total pressure is greater than the internal total pressure; If the external total pressure is greater than the internal total pressure, a preset current limiting module is used to adjust the charging current of the first battery to a preset current, so as to perform constant current charging on the first battery.

5. The method for connecting a power source according to claim 4, characterized in that: Before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes: Obtaining identification information of the current limiting module; If the identification information is the preset second information, the current limiting module is started.

6. The method for connecting a power source according to claim 4, characterized in that: Before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes: Obtaining a voltage difference between the external total pressure and the internal total pressure; If the voltage difference is less than a preset first voltage, the current limiting module is started.

7. The method for connecting a power source according to claim 4, characterized in that: Before the preset current limiting module is used to adjust the charging current of the first battery to a preset current so as to perform constant current charging on the first battery, the method further includes: Acquiring status information of the first battery; If the state information is the preset third information, the current limiting module is started.

8. The method for connecting a power source according to claim 7, characterized in that: After acquiring the status information of the first battery, the method further includes: If the state information is the preset fourth information, obtaining the closing condition of the charge and discharge switch; If the closing condition is the preset fifth information, the charge and discharge switch is closed, and the first battery is charged by using the preset second battery.

9. The method for connecting a power source according to claim 8, characterized in that: After obtaining the closing condition of the charge-discharge switch, the method further includes: If the closing condition is the preset sixth information, the battery management system is configured to enter a dormant state after a preset first time.

10. 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; When the first battery is in a power-deficient state, the battery management system of the first battery is configured to be in a working state, and the second battery is configured to charge the first battery.

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