Power supply system

Abstract

The embodiment of the utility model discloses a power-on system, and the system comprises a first battery which is configured to carry out the low-voltage power supply of a vehicle; one end of the second battery is electrically connected with one end of the first battery; the other end of the second battery is electrically connected with the other end of the first battery; wherein, when the first battery is in an undervoltage state, the second battery is configured to charge the first battery. According to the application, when the first battery for low-voltage power supply to the vehicle is lack of power, the second battery pre-configured on the vehicle can be directly adopted to charge the first battery, so that the situation that the vehicle cannot be started due to lack of power is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a power-up system. BACKGROUND

[0002] Due to the high failure rate, low energy density and short service life of 12V lead-acid batteries, 12V lithium batteries gradually replace traditional lead-acid batteries in the application of automobiles because of their light weight, long service life and high energy density.

[0003] In the related art, the charging and discharging efficiency of 12V lithium batteries at low temperature is low, which results in a small amount of charge, and if the vehicle is left for a long time, the low-voltage battery will certainly be discharged, thereby causing the vehicle to be unable to start. UTILITARIAN CONTENT

[0004] In view of the deficiencies of the prior art, the present application provides a power-up system, aiming to solve the technical problem of low-voltage lithium battery discharge in the prior art.

[0005] To solve the above problems, the present application provides a power-up system, which comprises:

[0006] A first battery configured to supply low-voltage power to a vehicle;

[0007] 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;

[0008] When the first battery is in a discharged state, the second battery is configured to charge the first battery.

[0009] Further, in the power-up system provided by the present application, the power-up system further comprises a converter;

[0010] Wherein, the first end of the converter is electrically connected to one end of the first battery, the second end of the converter is electrically connected to the other end of the first battery, and the third end and the fourth end of the converter are respectively electrically connected to the two ends of the second battery;

[0011] The converter is configured to convert the output voltage of the second battery into a preset first voltage, and the first voltage is configured as the charging voltage of the first battery.

[0012] Further, in the power-up system provided by the present application, the power-up system further comprises a current limiting module;

[0013] Wherein, one end of the current limiting module is electrically connected to one end of the first battery, and the other end of the current limiting module is electrically connected to one end of the second battery; when the first battery is in a discharged state, the current limiting module is configured to adjust the charging current of the first battery to a preset current.

[0014] Further, the power-up system further comprises a power-up power supply.

[0015] The power-up power supply is electrically connected to the other end of the current-limiting module and the other end of the first battery, respectively.

[0016] When the first battery is in the power shortage state, the power-up power supply is configured to charge the first battery through the current-limiting module, so that the internal total voltage of the first battery reaches the preset second voltage.

[0017] Further, in the power-up system provided in the present application, when the first battery is in the power shortage state and the internal total voltage of the first battery is greater than or equal to the second voltage, the second battery is configured to charge the first battery.

[0018] Further, the power-up system further comprises a charge-discharge switch.

[0019] The charge-discharge switch is electrically connected to one end of the first battery and one end of the current-limiting module, and is electrically connected to the other end of the second battery and the other end of the current-limiting module, respectively.

[0020] When the charge-discharge switch is turned off, the power-up power supply is configured to charge the first battery through the current-limiting module.

[0021] When the charge-discharge switch is turned on, the second battery is configured to charge the first battery through the charge-discharge switch.

[0022] Further, in the power-up system provided in the present application, when the first battery is in the power shortage state, the battery management system of the first battery is configured to be in a sleep state, or is configured to be in a working state.

[0023] Further, in the power-up system provided in the present application, the battery management system of the first battery is further configured to be in communication connection with the second battery.

[0024] Further, in the power-up system provided in the present application, the second battery is further configured to supply high-voltage power to the vehicle.

[0025] Further, in the power-up system provided in the present application, the first battery and the second battery are both lithium batteries.

[0026] The power-up system provided in the present application can directly use the second battery pre-configured on the vehicle to charge the first battery when the first battery used to supply low-voltage power to the vehicle is in a power shortage state, so as to avoid the vehicle from being unable to start due to the power shortage. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described in the following are some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings are within the protection scope of the present application.

[0028] Figure 1 The schematic diagram of the power hitching system provided by the embodiments of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present application.

[0030] It should be understood that, when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the 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 groups thereof.

[0031] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless otherwise clearly indicated by the context, the singular forms "a", "an" and "the" are intended to include the plural forms as well.

[0032] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] In addition, in the present application, unless otherwise explicitly specified or limited in the embodiments, the terms "mounting", "connection", "connection" and "fixing" and the like appearing in the embodiments should be understood in a broad sense, for example, the connection can be a fixed connection, or a detachable connection, or an integral part, which can be understood, or can be a mechanical connection, an electrical connection, etc. Of course, it can also be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements, or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific implementation situation.

[0034] Please refer to Figure 1 ,Figure 1 A schematic diagram of a power matching system provided by an embodiment of the present application is shown. As shown in Figure 1 The present application provides a power matching system, which comprises:

[0035] a first battery 110, configured to supply low-voltage power to the vehicle;

[0036] a second battery 120, one end of the second battery 120 is electrically connected to one end of the first battery 110, and the other end of the second battery 120 is electrically connected to the other end of the first battery 110;

[0037] When the first battery 110 is in a depleted state, the second battery 120 is configured to charge the first battery 110.

[0038] 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, and 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 can be a 12V low-voltage lithium battery, which can be configured to supply low-voltage power to the vehicle for starting the vehicle and providing auxiliary power to the vehicle.

[0039] Specifically, the vehicle can be divided into a low-voltage battery 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. The whole vehicle side of the vehicle can be provided with a low-power network (LPN), and the first battery 110 can provide power for the low-power network to ensure that the low-power network can control the vehicle.

[0040] The second battery 120 can be a high-voltage lithium battery, which can provide power to the vehicle. At the same time, the second battery 120 can charge the first battery 110 when the first battery 110 is in a depleted state, thereby avoiding the situation that the vehicle cannot be started, and ensuring the normal use of the vehicle.

[0041] In some embodiments, as shown in Figure 1 The power matching system further comprises a converter 130, wherein the first end of the converter 130 is electrically connected to one end of the first battery 110, the second end of the converter 130 is electrically connected to the other end of the first battery 110, the third end and the fourth end of the converter 130 are respectively electrically connected to the two ends of the second battery 120, and 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.

[0042] Specifically, the converter 130 can be a direct current DC / DC converter, which can convert the output voltage of the second battery 120. The second battery 120 can be a high-voltage battery pack, which can provide power for the vehicle, and the output voltage of the second battery 120 is much higher than the charging voltage of the first battery 110, so the second battery 120 cannot directly charge the first battery 110.

[0043] Therefore, the 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 electrically connected to the two ends of the second battery 120, thereby converting the output voltage of the second battery 120 to the charging voltage of the first battery 110, and charging the first battery 110 in the depleted state.

[0044] In some embodiments, as shown in Figure 1 The power-up system further 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 the depleted state, the current limiting module 140 is configured to adjust the charging current of the first battery 110 to a preset current.

[0045] Specifically, since the second battery 120 may generate a large current when charging the first battery 110 in the depleted state, and the first battery 110 cannot withstand a large current when it is in a serious depleted state, resulting in the first battery 110 being impacted. Therefore, the application can set a current limiting module 140 between the first battery 110 and the second battery 120, thereby limiting the charging current of the first battery 110 to a preset current when the first battery 110 is in the depleted state. Specifically, the output current of the second battery 120 can be limited to a preset current, to achieve constant current charging of the battery in the depleted state. The current limiting module 140 can be a direct current DC / DC converter, which can convert the output current of the second battery 120, and the model of the current limiting module 140 can be MPQ4232.

[0046] It can be understood that when the power-up system provided by the application charges the first battery 110 using the second battery 120, the converter 130 and the current limiting module 140, the converter 130 can convert the output voltage of the second battery 120, and the current limiting module 140 can convert the current again, to achieve constant current charging of the first battery 110 in the depleted state.

[0047] Further, in some embodiments, as shown in Figure 1As shown, the power-up system further comprises a power-up power supply 160; wherein the power-up power supply 160 is electrically connected to the first terminal A and the second terminal B respectively; when the first battery 110 is in the power shortage state, the power-up power supply 160 is configured to charge the first battery 110 through the current limiting module 140, so that the internal total voltage of the first battery 110 reaches the preset second voltage.

[0048] In the embodiment, the second voltage can be the first voltage mentioned above. Specifically, when the first battery 110 is in the power shortage state, if the second battery 120 cannot charge the first battery 110, for example, the second battery 120 is also in the power shortage state, at this time, the power-up power supply 160 can be connected to the first terminal A and the second terminal B, and the power-up power supply 160 can charge the first battery 110 in the power shortage state through the current limiting module until the internal total voltage of the first battery 110 reaches the preset second voltage.

[0049] Further, in some embodiments, when the first battery is in the power shortage state and the internal total voltage of the first battery is greater than or equal to the second voltage, the second battery is configured to charge the first battery.

[0050] Specifically, when the second battery 120 uses the converter 130 and the current limiting module 140 to charge the first battery 110 in the power shortage state, the charging current of the first battery 110 can 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 power-up power supply 160 can charge the first battery 110 in the power shortage state through the current limiting module, and at this time, the charging current of the first battery 110 can be 2A, which causes the first battery 110 to take a long time to be fully charged.

[0051] In order to shorten the charging time of the first battery 110 in the power shortage state, the application can first use the power-up power supply 160 and the current limiting module 140 to charge the first battery 110 at a constant current until the internal total voltage of the first battery 110 reaches the preset second voltage, and then use the second battery 120 and the converter 130 to charge the first battery at this time at a constant voltage, so as to shorten the charging time of the first battery 110 until the first battery 110 is in the full power state.

[0052] Wherein, the power-up power supply 160 can be provided by a power-up power bank, which can provide a direct current power supply of 9V-16V, and the power-up power bank is similar to a power bank used for charging a mobile phone. At the same time, the power-up power supply 160 can also be an alternating current power supply of 220V, which can be converted through the current limiting module 140 to realize charging the first battery 110 at a preset current.

[0053] 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 voltage of the first battery can be understood as the sum of the voltages of all the battery cells in the first battery.

[0054] Further, in some embodiments, as shown in Figure 1 The power supply 160 is configured to charge the first battery 110 through the current limiting module 140 when the charge-discharge switch 150 is open, and the second battery 120 is configured to charge the first battery 110 through the charge-discharge switch when the charge-discharge switch is closed.

[0055] In the present embodiment, the charge-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 depleted state, if the power supply 160 is used to charge the first battery 110, the charge-discharge switch 150 is in an open 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 at the same time, the charge-discharge switch 150 is closed, and 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-discharge switch 150, thereby avoiding the impact of large current on the first battery 110.

[0056] In some embodiments, the power supply system further comprises a battery management system configured to manage the first battery 110.

[0057] In the present 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-off of the charge-discharge switch 150 on the battery side. The first battery 110 and the battery management system can form a low-voltage battery pack.

[0058] Further, in some embodiments, the battery management system is further configured to be in communication connection with the second battery 120.

[0059] In the present embodiment, the battery management system can use CAN network to be in communication connection with the second battery 120, the converter 130 and the current limiting module 140, respectively, so that when the first battery 110 is in a depleted state, the power supply 160, the converter 130, the current limiting module 140 and the second battery 120 can be used to complete the power supply to the first battery 110 in a shorter time without generating current impact on the first battery 110.

[0060] Further, in some embodiments, the battery management system is configured to be in a sleep state when the first battery 110 is in the depleted state, or the battery management system is configured to be in an active state when the first battery 110 is in the depleted state.

[0061] In the present embodiment, the battery management system of the first battery 110 can be configured to be in a sleep state when the first battery 110 is in the depleted state. When the first battery in the depleted state needs to be charged, the battery management system of the first battery needs to be woken up, and after the battery management system of the first battery is woken up, the second battery 120 or / and the power supply is used to charge the first battery 110.

[0062] When the first battery 110 is in the depleted state, the battery management system of the first battery 110 can be configured to be in an active state. When the first battery in the depleted state needs to be charged, the battery management system of the first battery can be put to sleep first, and then the battery management system of the first battery is woken up, and after the battery management system of the first battery is woken up, the second battery 120 or / and the power supply is used to charge the first battery 110.

[0063] When the first battery 110 is in the depleted state, the battery management system of the first battery 110 can be configured to be in an active state. When the first battery in the depleted state needs to be charged, the second battery 120 or / and the power supply can be directly used to charge the first battery 110.

[0064] In some embodiments, the power supply 160 is electrically connected to the first terminal A through the first power supply clip, and is electrically connected to the second terminal B through the first power supply clip.

[0065] Specifically, the battery management system of the first battery provided in the present application is further configured to detect whether the first power supply clip and the first terminal A, and the second power supply clip and the second terminal B are loose, which can timely detect the failure of the power supply system due to the loosening of the power supply clip, and improves the reliability of the power supply system.

[0066] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements shall be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A hitching system, characterized in that The application relates to a power supply system for a vehicle. The power supply system comprises a first battery configured to supply low-voltage power to the vehicle, and a second battery having one end electrically connected to one end of the first battery and the other end electrically connected to the other end of the first battery. When the first battery is in a low-power state, the second battery is configured to charge the first battery. The power supply system further comprises a converter and a current-limiting module. The converter has one end electrically connected to one end of the first battery, the other end electrically connected to the other end of the first battery, the third end electrically connected to one end of the second battery, and the fourth end electrically connected to the other end of the second battery.

2. The power boost system of claim 1, wherein, The converter is configured to convert the output voltage of the second battery into a preset first voltage, which is configured as the charging voltage of the first battery. The current-limiting module has one end electrically connected to one end of the first battery and the other end electrically connected to one end of the second battery. When the first battery is in a low-power state, the current-limiting module is configured to adjust the charging current of the first battery to a preset current.

3. The power boost system of claim 2, wherein, The power supply system further comprises a power supply.

4. The power boost system of claim 2, wherein, The power supply is electrically connected to the other end of the current-limiting module and the other end of the first battery. When the first battery is in a low-power state, the power supply is configured to charge the first battery through the current-limiting module so that the internal total voltage of the first battery reaches a preset second voltage. When the first battery is in a low-power state and the internal total voltage of the first battery is greater than or equal to the second voltage, the second battery is configured to charge the first battery. The power supply system further comprises a charge-discharge switch.

5. The power boost system of any one of claims 1-4, wherein, The charge-discharge switch has one end electrically connected to one end of the first battery and one end of the current-limiting module, and the other end electrically connected to one end of the second battery and the other end of the current-limiting module.

6. The power boost system of any one of claims 1-4, wherein, When the charge-discharge switch is turned off, the power supply is configured to charge the first battery through the current-limiting module.

7. The power boost system of any one of claims 1-4, wherein, When the charge-discharge switch is turned on, the second battery is configured to charge the first battery through the charge-discharge switch.

8. The power boosting system of any one of claims 1-4, wherein, When the first battery is in a low-power state, the battery management system of the first battery is configured to be in a sleep state or a working state. The battery management system of the first battery is further configured to be communicatively connected to the second battery. The second battery is further configured to supply high-voltage power to the vehicle. The first battery and the second battery are both lithium batteries.

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