Sodium ion automobile emergency starting power supply charging method

Abstract

The invention discloses a sodium ion automobile emergency starting power supply charging method. The method comprises a DC charging circuit charging mode, a USB charging circuit charging mode and a generator charging mode. The sodium ion vehicle emergency starting power supply has the advantages that the charging speed of the sodium ion vehicle emergency starting power supply is increased, the service life of the sodium ion vehicle emergency starting power supply is prolonged, and when the sodium ion vehicle emergency starting power supply is used on a 12V vehicle or a 24V vehicle, the electric quantity consistency of four high battery packs and four low battery packs can be guaranteed to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the field of supplementary charging of sodium-ion automotive emergency starting power supplies, and particularly relates to a method for supplementary charging of sodium-ion automotive emergency starting power supplies. Background Art

[0002] Compared with lithium-ion batteries, sodium-ion batteries have better capacity retention rates in the temperature range of -40°C to 80°C, low costs, high charge-discharge rates, and high safety without potential hazards such as fire and explosion. They are particularly suitable for emergency starting situations where commercial vehicles and passenger vehicles often encounter difficulties in starting due to insufficient discharge capacity of lead-acid batteries at low temperatures in winter.

[0003] Compared with lithium-ion batteries, sodium-ion batteries have disadvantages such as low energy density, short cycle life, and insufficient technology maturity. The battery voltage platforms vary under different technical routes, requiring higher requirements for the battery management system.

[0004] Since it is necessary to support the emergency starting of vehicles with 12V generators and vehicles with 24V generators, and the voltage range of a single sodium-ion battery is 2.0 - 3.6V, in order to achieve the common use of emergency starting for vehicles with 12V generators and vehicles with 24V generators, 8 sodium-ion batteries are used in series. Therefore, when a voltage output of about 12V is required, 4 sodium-ion batteries are used in series; when a voltage output of about 24V is required, 8 sodium-ion batteries are used in series.

[0005] Set 1 - 4 sodium-ion batteries as the lower four-battery group, and 5 - 8 sodium-ion batteries as the upper four-battery group;

[0006] Therefore, in order to achieve the common use of emergency starting for vehicles with 12V generators and vehicles with 24V generators, 8 sodium-ion batteries are used in series; from the perspectives of cost and volume, 1 - 4 sodium-ion batteries are common for both 12V output and 24V output, and usually the lower four-battery group is selected as the common one. Considering the problems of low energy density and short cycle life of sodium-ion batteries, after more common 24V commercial vehicle emergency starting and supplementary charging, it becomes crucial to avoid the over-discharge or over-charge states of the upper four-battery group or the lower four-battery group and try to keep the capacitance of the upper four-battery group and the lower four-battery group consistent.

[0007] However, when customers mix the use of 12V and 24V jump starting, it is inevitable to cause an unbalanced state between the power of the lower four battery packs and the higher four battery packs. When the power of the lower four battery packs and the higher four battery packs is unbalanced, it will cause the problem of insufficient discharge capacity during 24V jump starting. For example, when the power of the lower four battery packs is relatively low, during 24V jump starting, all eight batteries discharge together. When the power of the lower four battery packs is exhausted, there is still power in the higher four battery packs. At this time, the discharge capacity depends on the power of the lower four battery packs; during 24V jump starting charging, all eight batteries charge together. When the higher four battery packs are fully charged, the lower four battery packs are not fully charged yet. Summary of the Invention

[0008] The purpose of the present invention is to provide a method for supplementing the power of a sodium-ion automotive emergency starting power supply, which has the advantages of improving the power supply speed of the sodium-ion automotive emergency starting power supply, extending the service life of the sodium-ion automotive emergency starting power supply, and ensuring the power consistency of the higher four battery packs and the lower four battery packs to the greatest extent when the sodium-ion automotive emergency starting power supply is used on 12V vehicles or 24V vehicles.

[0009] The above technical object of the present invention is achieved through the following technical solutions:

[0010] The method for supplementing the power of a sodium-ion automotive emergency starting power supply includes a DC charging circuit, a USB charging circuit for power supply, and a generator for power supply;

[0011] The sodium-ion automotive emergency starting power supply includes a lower four battery pack and a higher four battery pack, and the sodium-ion automotive emergency starting power supply is respectively used on vehicles with 12V generators and vehicles with 24V generators;

[0012] S1, first, according to the specifications of the sodium-ion automotive emergency starting power supply, charge the higher four battery packs and the lower four battery packs through one of the corresponding charging circuits, namely the DC charging circuit or the USB charging circuit. When the higher four battery packs and the lower four battery charging packs are fully charged, stop charging;

[0013] S2, for a vehicle with a 12V generator, after emergency starting through the sodium-ion automotive emergency starting power supply, the vehicle uses the 12V generator to charge the lower four battery packs of the sodium-ion automotive emergency starting power supply. When the voltage of the lower four battery packs is replenished to be the same as the voltage of the higher four battery packs, stop charging;

[0014] For a vehicle with a 24V generator, after emergency starting through the sodium-ion automotive emergency starting power supply, the vehicle uses the 24V generator to charge the higher four battery packs and the lower four battery packs of the sodium-ion automotive emergency starting power supply. When any one of the higher four battery packs and the lower four battery packs is fully charged, stop charging;

[0015] S3, repeat S1.

[0016] The preferred solutions are as follows:

[0017] Preferably: in S1, the upper four-cell battery pack and the lower four-cell battery pack are provided with a battery full flag bit, and each battery is provided with a discharged capacity value statistic;

[0018] The charging methods of the DC charging circuit and the USB charging circuit include the following operation steps,

[0019] S11, judge the full state of the upper four-cell battery pack and the lower four-cell battery pack;

[0020] S12, if both the upper four-cell battery pack and the lower four-cell battery pack are not full, control the DC charging circuit and the USB charging circuit to charge the upper four-cell battery pack and the lower four-cell battery pack;

[0021] S13, during the charging process,

[0022] State 1, if the upper four-cell battery pack is full first, then clear the discharged capacity value of the upper four-cell battery pack, control the DC charging circuit and the USB charging circuit to charge the lower four-cell battery pack, and enter S14;

[0023] State 2, if the lower four-cell battery pack is full first and the upper four-cell battery pack is not full, then clear the discharged capacity value of the lower four-cell battery pack and enter S15;

[0024] S14, if the lower four-cell battery pack is full, then clear the discharged capacity value of the lower four-cell battery pack, and at the same time set a mark at the battery full flag bit;

[0025] S15, stop charging.

[0026] Preferably: in S2, for a vehicle using a 12V generator to replenish power, the specific operation steps are as follows,

[0027] S21, the vehicle with a 12V generator is emergently started through the sodium-ion vehicle emergency starting power supply, and the vehicle uses the 12V generator to replenish power to the lower four-cell battery pack of the sodium-ion vehicle emergency starting power supply;

[0028] S22, marks are set at the battery full flag bits of both the upper four-cell battery pack and the lower four-cell battery pack;

[0029] Then, if the upper four-cell battery pack has not been used and the discharged capacity value of the lower four-cell battery pack is continuously decreasing due to the replenishment of the lower four-cell battery pack;

[0030] S23, when the discharged capacity value of the lower four-cell battery pack and the discharged capacity value of the upper four-cell battery pack are within the range of 5 - 10 mc, the charging circuit is disconnected and charging stops.

[0031] Preferred: In S2, when charging a vehicle using a 24V generator, the specific operation steps are as follows:

[0032] S21, The vehicle with a 24V generator is emergently started through a sodium-ion vehicle emergency starting power supply. The vehicle uses the 24V generator to charge the high four-section battery pack and the low four-section battery pack of the sodium-ion vehicle emergency starting power supply;

[0033] S22, The discharge amount values of the high four-section battery pack and the low four-section battery pack are continuously decreasing due to charging.

[0034] S23, When any one of the high four-section battery pack and the low four-section battery pack is fully charged, the charging circuit is disconnected and the charging stops.

[0035] Preferred: The vehicle with a 12V generator is emergently started through a sodium-ion vehicle emergency starting power supply. The discharge amount value of the low four-section battery pack increases, the high four-section battery pack is not used, and the discharge amount value of the low four-section battery pack is due to charging and does not decrease. Then, when the voltage of the low four-section battery pack exceeds the high four-section battery pack by 500mV, the charging stops.

[0036] Preferred: In S22, no mark is set for the battery full flag of the high four-section battery pack and the low four-section battery pack;

[0037] Then, when the high four-section battery pack is not used and the low four-section battery pack is charged, and the voltage of the low four-section battery pack and the voltage of the high four-section battery pack are within the range of 5 - 10mV, the charging circuit is disconnected and the charging stops.

[0038] In summary, the present invention has the following beneficial effects:

[0039] 1. Through the setting of the charging method combining the DC charging circuit, the USB charging circuit and the generator charging method, after slow charging by the DC charging circuit and the USB charging circuit, after the vehicle with a 12V generator is used, the vehicle with a 12V generator charges the sodium-ion vehicle emergency starting power supply, enabling the low four-section battery pack to quickly increase the power. The 12V generator charging has the advantages of high power and fast speed, and it can quickly charge, but it fails to accurately fill and balance the power of the low four-section battery pack and the high four-section battery pack of the sodium-ion vehicle emergency starting power supply. After quick charging, to ensure that the sodium-ion vehicle emergency starting power supply has no power shortage, then use the DC charging circuit and the USB charging circuit for slow charging, which can improve the charging speed of the sodium-ion vehicle emergency starting power supply and at the same time ensure the consistency of the power of the low four-section battery pack and the high four-section battery pack of the sodium-ion vehicle emergency starting power supply;

[0040] 2. By setting the power replenishment methods of the DC charging circuit, USB charging circuit and generator in combination, after the sodium-ion vehicle emergency starting power supply is used, it can be quickly replenished at any time through the 12V generator and 24V generator of the vehicle, avoiding the power deficit after the use of the sodium-ion vehicle emergency starting power supply, and can improve the service life of the sodium-ion vehicle emergency starting power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow framework diagram of the power replenishment methods of the DC charging circuit and USB charging circuit in the embodiment;

[0042] Figure 2 is a flow framework diagram of the power replenishment method of the generator in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] A power replenishment method for a sodium-ion vehicle emergency starting power supply, the sodium-ion vehicle emergency starting power supply includes a lower four-cell battery pack and an upper four-cell battery pack. The upper four-cell battery pack and the lower four-cell battery pack are provided with a battery full flag bit, and each battery is provided with a discharge amount value statistic. The sodium-ion vehicle emergency starting power supply is respectively used in vehicles with a 12V generator and vehicles with a 24V generator;

[0045] As Figure 1 - Figure 2 shown, it includes a power replenishment method of a DC charging circuit, a USB charging circuit and a generator;

[0046] S1. First, charge the upper four-cell battery pack and the lower four-cell battery pack through the corresponding one of the DC charging circuit and the USB charging circuit according to the specifications of the sodium-ion vehicle emergency starting power supply. When the upper four-cell battery pack and the lower four-cell battery charging group are full, stop charging;

[0047] S2. When a vehicle with a 12V generator is emergently started through the sodium-ion vehicle emergency starting power supply, the vehicle uses the 12V generator to charge the lower four-cell battery pack of the sodium-ion vehicle emergency starting power supply. When the voltage of the lower four-cell battery pack is replenished to be the same as the voltage of the upper four-cell battery pack, stop charging;

[0048] When a vehicle with a 24V generator is emergently started through the sodium-ion vehicle emergency starting power supply, the vehicle uses the 24V generator to charge the upper four-cell battery pack and the lower four-cell battery pack of the sodium-ion vehicle emergency starting power supply. When any one of the upper four-cell battery pack and the lower four-cell battery pack is full, stop charging;

[0049] S3. When the vehicles with a 12V generator and a 24V generator are not in use, repeat S1.

[0050] The specific operation steps are as follows:

[0051] As Figure 1 shown, in S1, the power supply replenishment methods of the DC charging circuit and the USB charging circuit include the following operation steps:

[0052] S11, determine the full state of the upper four-cell battery pack and the lower four-cell battery pack;

[0053] S12, if both the upper four-cell battery pack and the lower four-cell battery pack are not fully charged, control the DC charging circuit and the USB charging circuit to charge the upper four-cell battery pack and the lower four-cell battery pack;

[0054] S13, during the charging process,

[0055] State 1, if the upper four-cell battery pack is fully charged first, then clear the discharge amount value of the upper four-cell battery pack, control the DC charging circuit and the USB charging circuit to charge the lower four-cell battery pack, and enter S14;

[0056] State 2, if the lower four-cell battery pack is fully charged first and the upper four-cell battery pack is not fully charged, then clear the discharge amount value of the lower four-cell battery pack and enter S15;

[0057] S14, if the lower four-cell battery pack is fully charged, then clear the discharge amount value of the lower four-cell battery pack, and at the same time set a mark at the battery once fully charged flag bit;

[0058] S15, stop charging.

[0059] As Figure 2 shown, in S2, for replenishing power to a vehicle using a 12V generator, the specific operation steps are as follows:

[0060] When the current sampling circuit of the vehicle is not damaged,

[0061] S21, a vehicle with a 12V generator is emergently started through a sodium-ion vehicle emergency starting power supply, and the vehicle uses the 12V generator to replenish power to the lower four-cell battery pack of the sodium-ion vehicle emergency starting power supply;

[0062] S22,

[0063] State 1, marks are set at the battery once fully charged flag bits of both the upper four-cell battery pack and the lower four-cell battery pack;

[0064] Then, the upper four-cell battery pack has not been used, and the discharge amount value of the lower four-cell battery pack is continuously decreasing because the lower four-cell battery pack is being replenished with power, and enter S23;

[0065] State 2, marks are not set at the battery once fully charged flag bits of both the upper four-cell battery pack and the lower four-cell battery pack;

[0066] Then, when the upper four-cell battery pack is not in use and the lower four-cell battery pack is being charged, and the voltage of the lower four-cell battery pack and the upper four-cell battery pack is within the range of 0 - 10 mV, the charging circuit is disconnected and charging stops.

[0067] S23, when the discharge amount value of the lower four-cell battery pack and the discharge amount value of the upper four-cell battery pack are within the range of 5 - 10 mc, the charging circuit is disconnected and charging stops.

[0068] In the case where the current sampling circuit of the vehicle is damaged,

[0069] To prevent overcharging of the lower four-cell battery pack and damage to the battery, a vehicle with a 12V generator is emergently started through a sodium-ion vehicle emergency starting power supply. The discharge amount value of the lower four-cell battery pack increases, the upper four-cell battery pack is not in use, the discharge amount value of the lower four-cell battery pack is due to charging, and the discharge amount value does not decrease. Then, when the voltage of the lower four-cell battery pack exceeds the upper four-cell battery pack by 500 mV, charging stops.

[0070] In S2, for a vehicle with a 24V generator to replenish power, the specific operation steps are as follows.

[0071] S21, a vehicle with a 24V generator is emergently started through a sodium-ion vehicle emergency starting power supply. The vehicle uses the 24V generator to replenish power to the upper four-cell battery pack and the lower four-cell battery pack of the sodium-ion vehicle emergency starting power supply.

[0072] S22, the discharge amount values of the upper four-cell battery pack and the lower four-cell battery pack are continuously decreasing due to charging.

[0073] S23, when either the upper four-cell battery pack or the lower four-cell battery pack is fully charged, the charging circuit is disconnected and charging stops.

[0074] This specific embodiment is only an explanation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A sodium ion automobile emergency starting power supply replenishment method, characterized in that: Including DC charging circuit, USB charging circuit charging method and generator charging method; The sodium ion car emergency starting power supply includes a low four-cell battery pack and a high four-cell battery pack. The sodium ion car emergency starting power supply is used in vehicles with 12V generators and vehicles with 24V generators respectively; S1, firstly, according to the specification of the sodium ion automobile emergency starting power supply, a corresponding charging circuit of a DC charging circuit and a USB charging circuit is used to charge the high four-cell battery pack and the low four-cell battery pack. When the high four-cell battery pack and the low four-cell battery charging group are fully charged, the charging is stopped; S2, the vehicle with a 12V generator is emergency started by the sodium-ion automobile emergency starting power supply. The vehicle uses the 12V generator to charge the lower four-cell battery pack of the sodium-ion automobile emergency starting power supply. When the voltage of the lower four-cell battery pack is replenished to the same voltage as the higher four-cell battery pack, the charging is stopped; The vehicle with 24V generator is emergency started by the sodium ion car emergency starting power supply. The vehicle uses the 24V generator to charge the high four-cell battery group and the low four-cell battery group of the sodium ion car emergency starting power supply. When any one of the high four-cell battery group and the low four-cell battery group is full, the charging stops; S3: When the vehicle with a 12V generator or a vehicle with a 24V generator is not in use, repeat S1.

2. The sodium ion automobile emergency starting power supply replenishment method according to claim 1 is characterized in that: In S1, the upper four-cell battery pack and the lower four-cell battery pack are equipped with a battery full mark, and each battery is equipped with a discharge value statistics; The DC charging circuit and USB charging circuit charging method include the following steps: S11, determining the full state of the upper four-cell battery pack and the lower four-cell battery pack; S12, if both the upper four-cell battery pack and the lower four-cell battery pack are not fully charged, the DC charging circuit and the USB charging circuit are controlled to charge the upper four-cell battery pack and the lower four-cell battery pack; S13, during charging, In state 1, the upper four-cell battery pack is fully charged first, then the discharge value of the upper four-cell battery pack is reset to zero, and the DC charging circuit and the USB charging circuit are controlled to charge the lower four-cell battery pack, and then enter S14; State 2: The lower four battery packs are fully charged first, and the upper four battery packs are not fully charged. Then, the discharge value of the lower four battery packs is reset to zero, and the process goes to S15. S14, when the lower four battery packs are fully charged, the discharge value of the lower four battery packs is reset to zero, and a mark is set at the position where the battery was once fully charged; S15, stop charging.

3. The sodium ion automobile emergency starting power supply replenishment method according to claim 2 is characterized in that: In S2, the specific operation steps for recharging the vehicle using a 12V generator are as follows: S21, the vehicle with 12V generator is emergency started by the sodium ion car emergency starting power supply, and the vehicle uses the 12V generator to recharge the low four-cell battery pack of the sodium ion car emergency starting power supply; S22, the battery full mark positions of the upper four-cell battery pack and the lower four-cell battery pack are both marked; Then, the upper four-cell battery pack has not been used, and the discharge value of the lower four-cell battery pack is constantly decreasing because the lower four-cell battery pack is replenishing power; S23, when the discharge capacity value of the lower four-cell battery pack and the discharge capacity value of the upper four-cell battery pack are within the range of 5-10mc, the charging circuit is disconnected and charging stops.

4. The sodium ion automobile emergency starting power supply replenishment method according to claim 3 is characterized in that: In S2, the specific operation steps for recharging the vehicle using a 24V generator are as follows: S21, the vehicle with a 24V generator is emergency started by the sodium-ion automobile emergency starting power supply, and the vehicle uses the 24V generator to recharge the high four-cell battery pack and the low four-cell battery pack of the sodium-ion automobile emergency starting power supply; S22, the discharge values ​​of the high four-cell battery group and the low four-cell battery group are constantly decreasing due to charging; S23, when any one of the upper four-cell battery pack and the lower four-cell battery pack is fully charged, the charging circuit is disconnected and charging stops.

5. The sodium ion automobile emergency starting power supply replenishment method according to claim 3 is characterized in that: When a vehicle with a 12V generator is emergency started by the sodium ion automobile emergency starting power supply, the discharge value of the lower four battery packs increases, the upper four battery packs have not been used, the discharge value of the lower four battery packs is due to charging, and the discharge value has not decreased, then the voltage of the lower four battery packs exceeds the upper four battery packs by 500mV, and charging stops.

6. The sodium ion automobile emergency starting power supply replenishment method according to claim 3 is characterized in that: In S22, the battery full mark of the upper four-cell battery group and the lower four-cell battery group is not marked; Then, the upper four-cell battery pack is not used, the lower four-cell battery pack is charged, and when the voltage of the lower four-cell battery pack is within the range of 5-10mV with the voltage of the upper four-cell battery pack, the charging circuit is disconnected and charging stops.

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