Battery pack charging management system, management method and vehicle

Abstract

The present invention relates to the technical field of battery pack charging management for electric vehicles, and specifically refers to a battery pack charging management system, management method and vehicle. The present invention comprises a charging rate acquisition module for acquiring the current battery pack charging rate; a temperature acquisition module for acquiring the current battery pack temperature; a charging abnormality judgment module for judging whether the current battery pack has a problem of slow charging by the current battery pack charging rate; a temperature abnormality judgment module for judging whether the battery pack has a temperature abnormality by the current battery pack temperature; and a temperature adjustment module for adjusting the temperature of the battery pack when the battery pack has a problem of slow charging and the battery pack temperature has a temperature abnormality. The battery pack charging management method of the present invention is extremely simple, can solve the problem of slow charging rate occurring during the battery pack charging process, improves the charging efficiency and safety of the battery pack, and has great promotion value.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle battery pack charging management, and in particular to a battery pack charging management system, a management method and an automobile. Background Art

[0002] Compared with traditional vehicles, new energy electric vehicles have added three electrical systems such as battery packs. The battery pack will generate heat during the charging process, causing the temperature of the battery pack to rise sharply. If the charging temperature of the battery pack is not controlled, it will affect the charging rate of the battery pack. More seriously, it may cause the battery pack to spontaneously ignite and cause a fire. At present, new energy vehicles are equipped with a thermal management system that can adjust the temperature of the battery pack, but this adjustment is mainly made during the driving process of the car. There is no suitable temperature adjustment control method for the car in a static charging state. Moreover, during the charging process of new energy vehicles, not only the heat dissipation of the battery pack itself will have an adverse effect on the charging rate, but the temperature of the external environment will also cause a decrease in the charging rate. Too high or too low external environment temperature will affect the charging of the battery pack. Therefore, there is an urgent need for a method that can adjust the temperature of the battery pack when the battery pack is charging to improve the problem of the slow charging rate of the battery pack. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a battery pack charging management system, a management method and a vehicle.

[0004] The technical solution of the present invention is: a battery pack charging management system, comprising:

[0005] A charging rate acquisition module, which is used to acquire the current battery pack charging rate;

[0006] A temperature acquisition module, which is used to acquire the current battery pack temperature;

[0007] A charging abnormality judgment module, wherein the charging abnormality judgment module judges whether the current battery pack has a problem of slow charging according to the current battery pack charging rate;

[0008] A temperature abnormality judgment module, which judges whether the battery pack has a temperature abnormality according to the current battery pack temperature;

[0009] A temperature regulating module is used to regulate the temperature of the battery pack when the battery pack has a problem of slow charging and the battery pack has an abnormal temperature.

[0010] According to a battery pack charging management system provided by the present invention, the charging anomaly judgment module is used to compare the current battery pack charging rate with the set rate, and judge that the current battery pack has a problem of slow charging when the current battery pack charging rate is less than the set rate.

[0011] According to a battery pack charging management system provided by the present invention, the temperature abnormality judgment module is used to judge that the current battery pack is in a low temperature restricted state when the current battery pack temperature is lower than the first set temperature, judge that the current battery pack is in an over-temperature restricted state when the current battery pack temperature is higher than the second set temperature and lower than or equal to the third set temperature, and judge that the current battery pack is in a high temperature restricted state when the current battery pack temperature is higher than the third set temperature; the third set temperature is higher than the second set temperature and higher than the first set temperature.

[0012] According to a battery pack charging management system provided by the present invention, the temperature adjustment module comprises:

[0013] A heat dissipation and cooling module, which is used to dissipate heat and cool the battery pack when the battery pack is in an over-temperature limiting state or a high-temperature limiting state;

[0014] An air conditioning cooling module, the air conditioning cooling module is used to cool the battery pack when the battery pack is in a high temperature limited state;

[0015] A heating module is used to heat the battery pack when the battery pack is in a low temperature restricted state.

[0016] The present invention also provides a battery pack charging management method. When the battery pack is charging, the current battery pack charging rate and the current battery pack temperature are collected, and based on the current battery pack charging rate, it is determined whether the current battery pack has a problem of slow charging. When the battery pack has a problem of slow charging, it is determined which restricted state the current battery pack is in based on the current battery pack temperature, and the temperature of the battery pack is adjusted through a temperature adjustment module based on the restricted state of the battery pack.

[0017] According to a battery pack charging management method provided by the present invention, the method for judging whether the current battery pack charging has a problem of charging too slowly based on the current battery pack charging rate includes: comparing the collected current battery pack charging rate with a set rate, and judging that the battery pack has a problem of charging too slowly when the current battery pack charging rate is less than the set rate, otherwise judging that the current battery pack does not have a problem of charging too slowly.

[0018] According to a battery pack charging management method provided by the present invention, when the battery is charged, the SOC value of the current battery is collected, and a set rate corresponding to the SOC value is obtained based on the SOC value of the current battery.

[0019] According to a battery pack charging management method provided by the present invention, the method for determining which restricted state the current battery pack is in based on the current battery pack temperature includes: comparing the collected current battery pack temperature with a first set temperature, a second set temperature, and a third set temperature;

[0020] When the current battery pack temperature is lower than the first set temperature, it is determined that the current battery pack is in a low temperature restricted state;

[0021] When the current battery pack temperature is greater than or equal to the first set temperature and less than or equal to the second set temperature, it is determined that the current battery pack has other abnormal conditions;

[0022] When the current battery pack temperature is greater than the second set temperature and less than or equal to the third set temperature, it is determined that the current battery pack is in an over-temperature restricted state;

[0023] When the current battery pack temperature is greater than the third set temperature, it is determined that the current battery pack is in a high temperature restricted state.

[0024] According to a battery pack charging management method provided by the present invention, a method for adjusting the temperature of a battery pack through a temperature adjustment module based on a restricted state of the battery pack includes: when the battery pack is in a low temperature restricted state, heating the battery pack through a heating module in the temperature adjustment module;

[0025] When the battery pack is in a state where other abnormal conditions exist, the battery pack is not temperature regulated;

[0026] When the battery pack is in a state of over-temperature limitation, the heat dissipation module in the temperature regulation module is used to dissipate heat and cool the battery pack;

[0027] When the battery pack is in a high temperature limited state, the heat dissipation module and the air conditioning module in the temperature regulation module cooperate to cool the battery pack.

[0028] An electric vehicle uses the above management system.

[0029] The advantages of the present invention are as follows: 1. The present invention monitors the charging rate of the battery pack during charging to determine whether the battery pack has a problem of slow charging. If there is a problem of slow charging, the temperature of the battery pack is collected to determine whether it is affected by the temperature. When the temperature affects the charging rate of the battery pack, the temperature of the battery pack is adjusted in time through the temperature adjustment module, so that the battery pack can quickly get rid of the state of slow charging rate during the charging process, which greatly improves the charging efficiency and charging safety of the battery pack and has great promotion value.

[0030] 2. The present invention is very simple to judge whether the charging rate is too slow. The current battery pack charging rate is compared with the set rate. Once the current battery pack charging rate is less than the set rate, it can be judged that the current battery pack charging rate is too slow. The whole judgment method is simple and efficient, and the charging status of the battery pack can be quickly obtained.

[0031] 3. The present invention has an extremely simple temperature regulation method for the battery pack. It performs targeted regulation according to the restricted state of the battery pack. It uses a heating module to increase the temperature of the battery pack in the low temperature restricted state, uses a heat dissipation module to dissipate heat for the battery pack in the over-high temperature restricted state, and uses a heat dissipation module and an air conditioning module to coordinately cool the battery pack in the high temperature restricted state. The temperature regulation method is simple and the regulation efficiency is extremely high, so that the battery pack can quickly get out of the restricted state.

[0032] 4. The set rate of the present invention is set according to the SOC value of the battery pack. Different SOC values ​​correspond to different set rates. Such a setting can more accurately reflect the charging process of the battery pack and make the charging management of the battery pack more reasonable and scientific.

[0033] The battery pack charging management method of the present invention is extremely simple, can solve the problem of slow charging rate occurring during the battery pack charging process, improves the battery pack charging efficiency and safety, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : A schematic diagram of the structure of the battery pack charging temperature management system of the present invention;

[0035] Among them: 1—controller; 2—cooling water pump; 3—radiator; 4—heating pipeline; 5—air conditioning compressor; 6—condenser; 7—first heat exchanger; 8—cooling pipeline; 9—PTC; 10—heating water pump; 11—second heat exchanger; 12—heating pipeline. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1 This embodiment relates to a battery pack charging management system, which is mainly used in the charging process of new energy vehicles to solve the problem of slow charging rate of the battery pack due to temperature limitation during the charging process. By actively adjusting the temperature of the battery pack, the battery pack can be kept within a suitable temperature range. The battery pack can be charged quickly at a normal charging rate, thereby improving the charging efficiency and charging safety of the battery pack during the charging process.

[0041] Specifically, the battery pack charging management system of the present embodiment includes the following modules: a charging rate acquisition module for acquiring the current battery pack charging rate, a temperature acquisition module for acquiring the current battery pack temperature, a charging abnormality judgment module for judging whether the current battery pack has a problem of slow charging through the current battery pack charging rate, a temperature abnormality judgment module for judging whether the battery pack has a temperature abnormality through the current battery pack temperature, and a temperature regulation module for regulating the temperature of the battery pack when the battery pack has a problem of slow charging and the battery pack has a temperature abnormality.

[0042] When the battery pack is in the charging state, the charging rate acquisition module first acquires the current battery pack charging rate (the charging rate can be acquired by acquiring the battery pack charge change per unit time through a power sensor, etc.), and the charging abnormality judgment module determines whether the current battery pack charging rate is too slow based on the current battery pack charging rate. If the current battery pack has a problem of charging too slowly, the temperature acquisition module acquires the current battery pack temperature (the battery pack temperature can be acquired through the temperature sensor in the battery pack), and the temperature abnormality judgment module determines whether the current battery pack has a temperature abnormality based on the current battery pack temperature. If a temperature abnormality exists, the temperature regulation module can regulate the temperature of the battery pack to free the battery pack from the temperature abnormality, thereby ensuring that the battery pack can be charged at a normal charging rate.

[0043] The management system of this embodiment is mainly used in the charging process of the battery pack. It can monitor the rate and temperature of the battery pack during the charging process to ensure that the battery pack is always within the appropriate temperature range, so that the battery pack can be charged at a normal charging rate, greatly improving the efficiency and safety of battery pack charging.

[0044] In a further embodiment, this embodiment optimizes the charging abnormality judgment module. Specifically, the charging abnormality judgment module of this embodiment is used to compare the current battery pack charging rate with the set rate, and when the current battery pack charging rate is less than the set rate, it is judged that the current battery pack has a problem of slow charging.

[0045] That is, it is only necessary to compare the current battery pack charging rate with the set rate. If the current battery pack charging rate is less than the set rate, it can be determined that the battery pack is charging too slowly. The judgment method is extremely simple.

[0046] In another embodiment, the temperature abnormality judgment module is optimized in this embodiment. Specifically, the temperature abnormality judgment module judges the current battery pack temperature in the following cases:

[0047] When the current battery pack temperature is lower than the first set temperature, determining that the current battery pack is in a low temperature restricted state;

[0048] When the current battery pack temperature is greater than or equal to the first set temperature and less than or equal to the second set temperature, it is determined that the current battery pack has other abnormal conditions;

[0049] When the current battery pack temperature is greater than the second set temperature and less than or equal to the third set temperature, it is determined that the current battery pack is in an over-temperature restricted state;

[0050] When the current battery pack temperature is greater than the third set temperature, it is determined that the current battery pack is in a high temperature restricted state.

[0051] Among them, the third set temperature is greater than the second set temperature and greater than the first set temperature. The first set temperature, the second set temperature and the third set temperature can be set accordingly according to the actual situation of the battery pack, and the specific setting can be obtained through calibration.

[0052] That is, the temperature judgment mode of this embodiment is extremely simple. By setting the temperature division interval, the current battery pack temperature is compared, and the temperature limit of the current battery pack can be judged by looking at the interval.

[0053] In a further embodiment, the temperature adjustment module is optimized in this embodiment, such as Figure 1 As shown, the temperature adjustment module of this embodiment includes:

[0054] A heat dissipation and cooling module, which is used to dissipate heat and cool the battery pack when the battery pack is in an over-temperature limiting state or a high-temperature limiting state;

[0055] like Figure 1 As shown, the heat dissipation and cooling module of this embodiment includes a cooling water pump 2 and a radiator 3. The heat dissipation pipeline 4 connects the cooling water pump 2 and the radiator 3 in series. The heat dissipation pipeline 4 passes through the battery pack. The heat dissipation and cooling module is controlled by the controller 1. The cooling water pump 2 is started, and the coolant circulates in the heat dissipation pipeline 4 to bring the heat of the battery pack to the radiator 3 for heat dissipation, thereby dissipating and cooling the battery pack.

[0056] An air conditioning cooling module, the air conditioning cooling module is used to cool the battery pack when the battery pack is in a high temperature limited state;

[0057] like Figure 1 As shown, the air conditioning cooling module of this embodiment includes an air conditioning compressor 5, a condenser 6 and a first heat exchanger 7. The air conditioning compressor 5, the condenser 6 and the first heat exchanger 7 are connected in series through a cooling pipe 8. The air conditioning cooling module is controlled by a controller 1. The air conditioning compressor 5 is started, and the coolant flows in the cooling pipe 8. The cooling pipe 8 passes through the battery pack and brings the heat of the battery pack to the first heat exchange 7 for exchange. The heat in the first heat exchanger 7 flows into the condenser 6 through the coolant to dissipate.

[0058] A heating module, the heating module is used to heat the battery pack when the battery pack is in a low temperature limited state;

[0059] like Figure 1As shown, the heating module of this embodiment includes PTC9, a heating water pump 10 and a second heat exchanger 11. PTC9, the heating water pump 10 and the second heat exchanger 11 are connected in series through a heating pipe 12. PTC9, the heating water pump 10 and the second heat exchanger 11 are controlled by a controller 1. When PTC9 and the heating water pump 10 are started, the heating pipe 12 passes through the battery pack, and the heating liquid in the heating pipe 12 flows through the battery pack to heat the battery pack.

[0060] The present invention also provides a management method for a battery pack charging management system, and the specific method is as follows: when the battery pack is charging, the current battery pack charging rate and the current battery pack temperature are collected, and based on the current battery pack charging rate, it is determined whether the current battery pack has a problem of charging too slowly; when the battery pack has a problem of charging too slowly, it is determined based on the current battery pack temperature which restricted state the current battery pack is in, and based on the restricted state of the battery pack, the temperature of the battery pack is adjusted through a temperature adjustment module.

[0061] A specific method for determining whether the current battery pack is charging too slowly is as follows: comparing the collected current battery pack charging rate with the set rate; if the current battery pack charging rate is less than the set rate, determining that the battery pack is charging too slowly; otherwise, determining that the current battery pack is not charging too slowly.

[0062] The set rate is obtained according to the following method: when the battery is charged, the SOC value of the current battery is collected, and the set rate corresponding to the SOC value is obtained based on the SOC value of the current battery;

[0063] That is, the SOC value is divided into multiple intervals, each interval corresponds to a set rate, and the set rate of the interval can be obtained by calibration. When the battery is charging, the current battery pack charging rate is collected, and the current battery pack charging rate is compared with the set rate corresponding to the interval. For example, the battery pack is divided into ten intervals according to SOC, namely A1, A2, A3...A10, and each interval corresponds to a set rate, that is, the A1 interval corresponds to the a1 set rate, A2 corresponds to the a2 set rate, and so on, until the A10 interval corresponds to the a10 set rate. During actual charging, the SOC value of the current battery pack is obtained, and then the set rate corresponding to the SOC value is obtained, and then the charging rate obtained is compared with the set rate by collecting the current battery pack charging rate.

[0064] A specific method for determining which restricted state the current battery pack is in based on the current battery pack temperature includes: comparing the collected current battery pack temperature with a first set temperature, a second set temperature, and a third set temperature;

[0065] When the current battery pack temperature is lower than the first set temperature, it is determined that the current battery pack is in a low temperature restricted state;

[0066] When the current battery pack temperature is greater than or equal to the first set temperature and less than or equal to the second set temperature, it is determined that the current battery pack has other abnormal conditions;

[0067] When the current battery pack temperature is greater than the second set temperature and less than or equal to the third set temperature, it is determined that the current battery pack is in an over-temperature restricted state;

[0068] When the current battery pack temperature is greater than the third set temperature, it is determined that the current battery pack is in a high temperature restricted state. For example, the first set temperature is 20°C, the second set temperature is 60°C, and the third set temperature is 80°C. When the temperature of the battery pack is between the first set temperature and the second set temperature, it proves that the charging temperature of the battery pack is normal at this time. The problem of the slow charging rate of the battery pack is not caused by temperature factors. The temperature factor can be excluded and other factors can be considered.

[0069] In addition, the method for adjusting the temperature of the battery pack by the temperature adjustment module based on the limited state of the battery pack is as follows: when the battery pack is in the low temperature limited state, the battery pack is heated by the heating module in the temperature adjustment module, referring to the above method of adjusting the temperature of the battery pack by using the PTC, the heating water pump and the second heat exchanger;

[0070] When the battery pack is in a state of other abnormal conditions, the battery pack is not temperature-regulated. In this case, the temperature factor needs to be eliminated and the influence of other factors on the charging rate of the battery pack needs to be considered;

[0071] When the battery pack is in a temperature-limited state, the heat dissipation module in the temperature regulation module is used to dissipate heat and cool the battery pack, referring to the above method of using a cooling water pump and a radiator to dissipate heat and cool the battery pack;

[0072] When the battery pack is in a high temperature limited state, the heat dissipation module and the air conditioning module in the temperature regulation module cooperate to cool the battery pack, referring to the above use of the cooling water pump, radiator, air conditioning compressor, condenser and first heat exchanger to cool the battery pack.

[0073] The purpose of temperature regulation is to adjust the temperature of the battery pack to be within a suitable range. The suitable temperature range in this embodiment is a temperature range between the first set temperature and the second set temperature.

[0074] The present invention also provides an electric vehicle, and the vehicle provided by the present invention uses the above-mentioned management system.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A battery pack charging management system, characterized in that: include, A charging rate acquisition module, which is used to acquire the current battery pack charging rate, acquire the current battery SOC value, and acquire a set rate corresponding to the SOC value based on the current battery SOC value; A temperature acquisition module, which is used to acquire the current battery pack temperature; A charging abnormality judgment module, wherein the charging abnormality judgment module judges whether the current battery pack has a problem of slow charging according to the current battery pack charging rate; A temperature abnormality judgment module, which judges whether the battery pack has a temperature abnormality according to the current battery pack temperature; A temperature regulating module, wherein when the battery pack has a problem of slow charging, the temperature regulating module is used to determine which restricted state the battery pack is in based on the current battery pack temperature, and to regulate the temperature of the battery pack based on the restricted state of the battery pack; The charging anomaly judgment module is used to compare the current battery pack charging rate with the set rate, and when the current battery pack charging rate is less than the set rate, it is judged that the current battery pack has a problem of charging too slowly.

2. A battery pack charging management system as claimed in claim 1, characterized in that: The temperature abnormality judgment module is used to judge that the current battery pack is in a low temperature restricted state when the current battery pack temperature is lower than the first set temperature, to judge that the current battery pack is in an over-temperature restricted state when the current battery pack temperature is higher than the second set temperature and lower than or equal to the third set temperature, and to judge that the current battery pack is in a high temperature restricted state when the current battery pack temperature is higher than the third set temperature; the third set temperature is higher than the second set temperature and higher than the first set temperature.

3. A battery pack charging management system as claimed in claim 1, characterized in that: The temperature adjustment module comprises: A heat dissipation and cooling module, which is used to dissipate heat and cool the battery pack when the battery pack is in an over-temperature limiting state or a high-temperature limiting state; An air conditioning cooling module, the air conditioning cooling module is used to cool the battery pack when the battery pack is in a high temperature limited state; A heating module is used to heat the battery pack when the battery pack is in a low temperature restricted state.

4. A management method for a battery pack charging management system according to any one of claims 1 to 3, characterized in that: When the battery pack is charging, the current battery pack charging rate and the current battery pack temperature are collected, and based on the current battery pack charging rate, it is determined whether the current battery pack has a problem of charging too slowly. If the battery pack has a problem of charging too slowly, it is determined based on the current battery pack temperature which restricted state the current battery pack is in, and the temperature of the battery pack is adjusted through the temperature adjustment module based on the restricted state of the battery pack; The method for judging whether the current battery pack has a problem of charging too slowly based on the current battery pack charging rate includes: comparing the collected current battery pack charging rate with a set rate, and judging that the battery pack has a problem of charging too slowly when the current battery pack charging rate is less than the set rate, and otherwise judging that the current battery pack does not have a problem of charging too slowly; When the battery is charging, the current SOC value of the battery is collected, and based on the current SOC value of the battery, a set rate corresponding to the SOC value is obtained.

5. A battery pack charging management method as claimed in claim 4, characterized in that: The method for determining which restricted state the current battery pack is in based on the current battery pack temperature includes: comparing the collected current battery pack temperature with a first set temperature, a second set temperature, and a third set temperature; When the current battery pack temperature is lower than the first set temperature, it is determined that the current battery pack is in a low temperature restricted state; When the current battery pack temperature is greater than or equal to the first set temperature and less than or equal to the second set temperature, it is determined that the current battery pack has other abnormal conditions; When the current battery pack temperature is greater than the second set temperature and less than or equal to the third set temperature, it is determined that the current battery pack is in an over-temperature restricted state; When the current battery pack temperature is greater than the third set temperature, it is determined that the current battery pack is in a high temperature restricted state.

6. A battery pack charging management method as claimed in claim 5, characterized in that: The method for adjusting the temperature of a battery pack by a temperature adjustment module based on a limited state of the battery pack includes: when the battery pack is in a low temperature limited state, heating the battery pack by a heating module in the temperature adjustment module; When the battery pack is in a state where other abnormal conditions exist, the battery pack is not temperature regulated; When the battery pack is in a state of over-temperature limitation, the heat dissipation module in the temperature regulation module is used to dissipate heat and cool the battery pack; When the battery pack is in a high temperature limited state, the heat dissipation module and the air conditioning module in the temperature regulation module cooperate to cool the battery pack.

7. An electric vehicle, characterized in that: It uses a management system as described in any one of claims 1 to 3.

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