Control method and device for preventing power battery from being discharged by mistake in charging process

Abstract

The invention relates to the technical field of power batteries, and discloses a control method and device for preventing mistaken discharging of a power battery in the charging process, and the method comprises the steps: determining a thermal management scheme for the power battery when it is detected that the power battery of a vehicle enters a preset charging mode; detecting battery information of the power battery based on the thermal management scheme; when it is detected that temperature information contained in the battery information is used for representing that the temperature of the power battery is smaller than or equal to a first preset temperature, a to-be-heated target object contained in a heat management scheme is heated according to the battery information and the heat management scheme of the vehicle, so that the temperature of the power battery rises to a second preset temperature, the second preset temperature is higher than the first preset temperature. Visibly, when the power battery is charged under the low-temperature condition, the condition that the power battery is heated by mistaken discharging can be reduced by setting the battery heating process, so that the charging efficiency and the charging speed of the power battery are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a control method and device for preventing mis-discharging of a power battery during charging. Background Art

[0002] The current charging methods used by new energy vehicles on the market mainly include DC charging and AC charging (slow charging). Due to the characteristics of power batteries, charging efficiency will be low or charging will be prohibited under low temperature conditions. The existing thermal management solutions mainly include: using liquid heat / PTC / heating film to heat the battery to raise the battery temperature to the optimal temperature.

[0003] However, it is found in practice that, due to the low output power of the existing OBC and the high power required for thermal management, it is easy to cause the battery to mistakenly release a certain amount of electricity to heat the battery during the slow charging process (slow charging mode 2), so that the power battery is charged less and less, reducing the charging efficiency of the battery, and easily causing over-discharge in extreme cases. It can be seen that it is particularly important to propose a control technology solution to prevent the power battery from mis-discharging during the charging process to improve the charging efficiency of the power battery. Summary of the invention

[0004] The present invention provides a control method and device for preventing a power battery from mis-discharging during charging, which can reduce the occurrence of the power battery mis-discharging and heating itself when charging the power battery under low temperature conditions, thereby helping to improve the charging efficiency of the power battery.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses a control method for preventing mis-discharging of a power battery during charging, the method comprising:

[0006] When it is detected that the power battery of the vehicle enters a preset charging mode, determining a thermal management solution for the power battery;

[0007] Based on the thermal management solution, detecting battery information of the power battery;

[0008] When it is detected that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to a first preset temperature, the charging environment of the power battery is heated and controlled according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature, which is higher than the first preset temperature.

[0009] As an optional implementation, in the first aspect of the present invention, the thermal management solution is a solution for heating the charging environment of the power battery by a preset heating object, the heating object is used to heat the temperature of the charging environment of the power battery, and the heating object includes an electric heating element or a water pump management system;

[0010] When the thermal management scheme is a first thermal management scheme of heating by the electric heating element, the battery information includes temperature information and power information;

[0011] When the thermal management scheme is a first thermal management scheme of performing heating through the water pump management system, the battery information includes the temperature information.

[0012] As an optional implementation, in the first aspect of the present invention, the heating control of the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature includes:

[0013] When the thermal management scheme is the first thermal management scheme, determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information, wherein the branch circuit pickup requirement includes a single-circuit pickup requirement or a dual-circuit pickup requirement;

[0014] Based on the branch circuit closing requirement, controlling a target heating branch among all heating branches of the battery high voltage circuit that matches the branch circuit closing requirement to be turned on;

[0015] The charging environment of the power battery is heated by the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises to a second preset temperature.

[0016] As an optional embodiment, in the first aspect of the present invention, heating the charging environment of the power battery by the target electric heating element in the target heating branch so that the ambient temperature of the power battery rises to a second preset temperature includes:

[0017] When the branch circuit pickup requirement is the dual-circuit pickup requirement, the charging environment of the power battery is heated by the electric heating element in the target heating branch circuit that matches the dual-circuit pickup requirement, and battery change information of the power battery during the heating process is detected, wherein the battery change information includes temperature change information and power change information;

[0018] Determining whether the real-time power level of the power battery represented by the power level change information is greater than or equal to a second preset power level, and the second preset power level is less than the first preset power level;

[0019] When it is determined that the real-time power of the power battery represented by the power change information is less than or equal to the second preset power, the operation of determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information is triggered;

[0020] When it is determined that the real-time power of the power battery represented by the power change information is greater than the second preset power, repeatedly performing the operation of heating the charging environment of the power battery by using the electric heating element in the target heating branch matching the dual-path pickup requirement until the ambient temperature of the power battery rises to the second preset temperature;

[0021] And, the method further comprises:

[0022] When the ambient temperature of the power battery rises to the second preset temperature, the target heating branch is controlled to be disconnected so that the power battery is in a normal charging state.

[0023] As an optional implementation, in the first aspect of the present invention, determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information included in the battery information includes:

[0024] According to the power information included in the battery information, determining whether the power information is used to indicate whether the power of the power battery is less than or equal to a first preset power;

[0025] When it is determined that the power information is used to indicate that the power of the power battery is less than or equal to the first preset power, determining the branch circuit pickup demand of the power battery as a single circuit pickup demand;

[0026] When it is determined that the power information is used to indicate that the power of the power battery is greater than the first preset power, the branch circuit pickup requirement of the power battery is determined as a dual-circuit pickup requirement.

[0027] As an optional implementation, in the first aspect of the present invention, the heating control of the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature includes:

[0028] When the thermal management scheme is the second thermal management scheme, detecting the water inlet temperature of the water pump management system adopted by the second thermal management scheme;

[0029] Determining a speed mode of the water pump management system according to the water inlet temperature;

[0030] Based on the speed mode, determining a parameter control requirement of the water pump management system, wherein the parameter control requirement includes a water temperature control requirement and / or a water pump speed control requirement;

[0031] According to the parameter control requirement, the water pump management system is controlled to heat the charging environment of the power battery so that the ambient temperature of the power battery rises to a second preset temperature.

[0032] As an optional implementation, in the first aspect of the present invention, determining the speed mode of the water pump management system according to the water inlet temperature includes:

[0033] Determining whether the water inlet temperature is greater than a preset water inlet temperature;

[0034] When it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode;

[0035] When it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, and the first water pump speed corresponding to the first speed mode is higher than the second water pump speed corresponding to the second speed mode.

[0036] As an optional implementation manner, in the first aspect of the present invention, determining a thermal management solution for the power battery includes:

[0037] Acquire at least one preset initial thermal management scheme for the power battery of the vehicle, each of the initial thermal management schemes having a corresponding execution priority;

[0038] When the number of the initial thermal management schemes is 1, determining the initial thermal management scheme as a thermal management scheme for the power battery;

[0039] When the number of the initial thermal management schemes is greater than 1, one with the highest execution priority is selected from all the initial thermal management schemes as the thermal management scheme for the power battery.

[0040] A second aspect of the present invention discloses a control device for preventing a power battery from accidentally discharging during charging, the device comprising:

[0041] A determination module, configured to determine a thermal management solution for the power battery when it is detected that the power battery of the vehicle enters a preset charging mode;

[0042] A detection module, used to detect battery information of the power battery based on the thermal management solution;

[0043] A control module is used to control the heating of the charging environment of the power battery according to the battery information and the thermal management scheme when it is detected that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to the first preset temperature, so that the ambient temperature of the power battery rises to a second preset temperature, and the second preset temperature is higher than the first preset temperature.

[0044] As an optional implementation, in the second aspect of the present invention, the thermal management scheme is a scheme of heating the charging environment of the power battery by a preset heating object, the heating object is used to heat the temperature of the charging environment of the power battery, and the heating object includes an electric heating element or a water pump management system;

[0045] When the thermal management scheme is a first thermal management scheme of heating by the electric heating element, the battery information includes temperature information and power information;

[0046] When the thermal management scheme is a first thermal management scheme of performing heating through the water pump management system, the battery information includes the temperature information.

[0047] As an optional implementation, in the second aspect of the present invention, the control module controls the heating of the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to the second preset temperature, specifically including:

[0048] When the thermal management scheme is the first thermal management scheme, determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information, wherein the branch circuit pickup requirement includes a single-circuit pickup requirement or a dual-circuit pickup requirement;

[0049] Based on the branch circuit closing requirement, controlling a target heating branch among all heating branches of the battery high voltage circuit that matches the branch circuit closing requirement to be turned on;

[0050] The charging environment of the power battery is heated by the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises to a second preset temperature.

[0051] As an optional implementation, in the second aspect of the present invention, the control module heats the charging environment of the power battery through the target electric heating element in the target heating branch so that the ambient temperature of the power battery rises to the second preset temperature, specifically including:

[0052] When the branch circuit pickup requirement is the dual-circuit pickup requirement, the charging environment of the power battery is heated by the electric heating element in the target heating branch circuit that matches the dual-circuit pickup requirement, and battery change information of the power battery during the heating process is detected, wherein the battery change information includes temperature change information and power change information;

[0053] Determining whether the real-time power level of the power battery represented by the power level change information is greater than or equal to a second preset power level, and the second preset power level is less than the first preset power level;

[0054] When it is determined that the real-time power of the power battery represented by the power change information is less than or equal to the second preset power, the operation of determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information is triggered;

[0055] When it is determined that the real-time power of the power battery represented by the power change information is greater than the second preset power, repeatedly performing the operation of heating the charging environment of the power battery by using the electric heating element in the target heating branch matching the dual-path pickup requirement until the ambient temperature of the power battery rises to the second preset temperature;

[0056] Furthermore, the control module is further configured to control the target heating branch to be disconnected when the ambient temperature of the power battery rises to the second preset temperature, so that the power battery is in a normal charging state.

[0057] As an optional implementation, in the second aspect of the present invention, the control module determines the branch pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information included in the battery information, specifically including:

[0058] According to the power information included in the battery information, determining whether the power information is used to indicate whether the power of the power battery is less than or equal to a first preset power;

[0059] When it is determined that the power information is used to indicate that the power of the power battery is less than or equal to the first preset power, determining the branch circuit pickup demand of the power battery as a single circuit pickup demand;

[0060] When it is determined that the power information is used to indicate that the power of the power battery is greater than the first preset power, the branch circuit pickup requirement of the power battery is determined as a dual-circuit pickup requirement.

[0061] As an optional implementation, in the second aspect of the present invention, the control module controls the heating of the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to the second preset temperature, specifically including:

[0062] When the thermal management scheme is the second thermal management scheme, detecting the water inlet temperature of the water pump management system adopted by the second thermal management scheme;

[0063] Determining a speed mode of the water pump management system according to the water inlet temperature;

[0064] Based on the speed mode, determining a parameter control requirement of the water pump management system, wherein the parameter control requirement includes a water temperature control requirement and / or a water pump speed control requirement;

[0065] According to the parameter control requirement, the water pump management system is controlled to heat the charging environment of the power battery so that the ambient temperature of the power battery rises to a second preset temperature.

[0066] As an optional implementation, in the second aspect of the present invention, the control module determines the speed mode of the water pump management system according to the water inlet temperature in a manner that specifically includes:

[0067] Determining whether the water inlet temperature is greater than a preset water inlet temperature;

[0068] When it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode;

[0069] When it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, and the first water pump speed corresponding to the first speed mode is higher than the second water pump speed corresponding to the second speed mode.

[0070] As an optional implementation, in the second aspect of the present invention, the manner in which the determination module determines the thermal management solution for the power battery specifically includes:

[0071] Acquire at least one preset initial thermal management scheme for the power battery of the vehicle, each of the initial thermal management schemes having a corresponding execution priority;

[0072] When the number of the initial thermal management schemes is 1, determining the initial thermal management scheme as a thermal management scheme for the power battery;

[0073] When the number of the initial thermal management schemes is greater than 1, one with the highest execution priority is selected from all the initial thermal management schemes as the thermal management scheme for the power battery.

[0074] A third aspect of the present invention discloses another control device for preventing mis-discharging of a power battery during charging, the device comprising:

[0075] A memory storing executable program code;

[0076] a processor coupled to the memory;

[0077] The processor calls the executable program code stored in the memory to execute the control method for preventing the power battery from accidentally discharging during the charging process disclosed in the first aspect of the present invention.

[0078] The fourth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the control method for preventing the power battery from accidentally discharging during the charging process disclosed in the first aspect of the present invention.

[0079] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0080] In the embodiment of the present invention, when it is detected that the power battery of the vehicle enters the preset charging mode, a thermal management scheme for the power battery is determined; based on the thermal management scheme, the battery information of the power battery is detected; when it is detected that the temperature information contained in the battery information is used to indicate that the temperature of the power battery is less than or equal to the first preset temperature, the target object to be heated contained in the thermal management scheme is heated according to the battery information and the thermal management scheme of the vehicle, so that the temperature of the power battery rises to a second preset temperature, and the second preset temperature is higher than the first preset temperature. It can be seen that the implementation of the present invention can provide an efficient, automatic and flexible method for heating control with multiple schemes compared to the existing battery charging environment heating scheme, which not only reduces the situation that the power battery is discharged incorrectly during the charging process to heat the charging environment where the battery is located and causes over-discharge under extreme conditions, but also improves the charging efficiency and charging accuracy of the power battery, ensures the reliability and accuracy of charging the power battery, thereby facilitating the subsequent power battery to provide power to the vehicle. Efficiency and speed of power supply, thereby facilitating the normal operation of the vehicle, and improving the user experience of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0082] Figure 1 It is a flow chart of a control method for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention;

[0083] Figure 2 It is a schematic diagram of a process of heating a charging environment of a power battery during a charging process disclosed in an embodiment of the present invention;

[0084] Figure 3 It is a flow chart of another control method for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention;

[0085] Figure 4 It is a schematic diagram of another process of heating the charging environment of the power battery during the charging process disclosed in an embodiment of the present invention;

[0086] Figure 5 It is a structural schematic diagram of a control device for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention;

[0087] Figure 6 It is a structural schematic diagram of another control device for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0088] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0089] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0090] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0091] The present invention discloses a control method and device for preventing the mis-discharge of a power battery during charging. Compared with the existing battery charging environment heating scheme, it provides an efficient, automated method with flexible selection of multiple schemes for heating control, which not only reduces the mis-discharge of the power battery during charging to heat the charging environment of the battery and causes over-discharge under extreme conditions, but also improves the charging efficiency and charging accuracy of the power battery, ensures the reliability and accuracy of charging the power battery, and is conducive to improving the subsequent power battery power supply efficiency and power supply speed for the vehicle, thereby facilitating the normal operation of the vehicle and improving the user experience of the vehicle. The following are detailed descriptions.

[0092] Embodiment 1

[0093] See also Figure 1 , Figure 1 1 is a flow chart of a control method for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention. Figure 1 The control method for preventing the power battery from accidentally discharging during charging described above can be applied to a control device for preventing the power battery from accidentally discharging during charging, wherein the device may include a control device or a control server, wherein the control server may include a cloud server or a local server, which is not limited in the embodiments of the present invention. Figure 1 As shown, the control method for preventing the power battery from mis-discharging during charging may include the following operations:

[0094] 101. When it is detected that the power battery of the vehicle enters a preset charging mode, a thermal management solution for the power battery is determined.

[0095] In the embodiment of the present invention, the thermal management scheme is a scheme for heating the charging environment of the power battery through a preset heating object. Optionally, the heating object is used to heat the temperature of the charging environment of the power battery, and the heating object includes an electric heating element or a water pump management system. Optionally, the electric heating element may include a PTC contactor of the power battery, or may include a heating film contactor of the power battery, which is not limited in the embodiment of the present invention.

[0096] Specifically, the thermal management scheme may include a first thermal management scheme for heating the temperature of the charging environment of the power battery by an electric heating element, and / or a second thermal management scheme for heating the temperature of the charging environment of the power battery by a water pump management system.

[0097] Specifically, determining the thermal management solution for the power battery may include:

[0098] Obtaining at least one preset initial thermal management scheme for a power battery of a vehicle, each initial thermal management scheme having a corresponding execution priority;

[0099] When the number of initial thermal management schemes is 1, determining an initial thermal management scheme as a thermal management scheme for the power battery;

[0100] When the number of initial thermal management schemes is greater than 1, one with the highest execution priority is selected from all initial thermal management schemes as the thermal management scheme for the power battery.

[0101] In the embodiment of the present invention, the execution priority of the second thermal management scheme is higher than the execution priority of the first thermal management scheme. In this way, when the vehicle has both the first thermal management scheme and the second thermal management scheme, the second thermal management scheme with the highest thermal efficiency for the battery part is executed first, which is beneficial to improving the thermal efficiency of the power battery.

[0102] 102. Detect battery information of the power battery based on the thermal management solution.

[0103] In the embodiment of the present invention, optionally, the battery information may include the temperature information of the power battery during the charging process, the power information of the power battery during the charging process, and the health status information of the power battery during the charging process. Specifically, when the thermal management scheme is the first thermal management scheme for heating by an electric heating element, the battery information may include temperature information and power information; when the thermal management scheme is the first thermal management scheme for heating by a water pump management system, the battery information may include temperature information, which is not limited in the embodiment of the present invention.

[0104] In the embodiment of the present invention, when step 102 detects that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to the first preset temperature, step 103 is triggered to be executed; when step 102 detects that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is greater than the first preset temperature, the power battery can be charged normally through the charging mode, or the present process can be terminated. The ambient temperature of the power battery is the temperature of the charging environment in which the power battery is located during the charging process, which is not limited in the embodiment of the present invention.

[0105] 103. According to the battery information and the thermal management solution, the charging environment of the power battery is heated and controlled so that the ambient temperature of the power battery rises to a second preset temperature.

[0106] In the embodiment of the present invention, the second preset temperature is higher than the first preset temperature.

[0107] Specifically, when the thermal management scheme only includes the first thermal management scheme, the electric heating element is controlled to heat the charging environment of the power battery according to the temperature information and power information of the power battery and the first thermal management scheme, so that the ambient temperature of the power battery rises to the second preset temperature.

[0108] When the thermal management scheme only includes the second thermal management scheme, the water pump management system is controlled to heat the charging environment of the power battery according to the temperature information of the power battery, the detected water inlet temperature of the water pump management system, and the second thermal management scheme, so that the ambient temperature of the power battery rises to the second preset temperature.

[0109] It can be seen that implementation Figure 1 The described control method for preventing the power battery from being discharged accidentally during the charging process can, by setting a thermal management solution for the power battery, control the heating of the charging environment of the power battery through the temperature information and / or power information of the power battery and the thermal management solution when the power battery of the vehicle is in a low-temperature and slow-charging state, thereby efficiently and accurately achieving control of the rise in the ambient temperature of the power battery. Compared with the existing battery charging environment heating solution (i.e., a solution that heats the battery based on the OBC output power and the thermal management demand power to increase the battery temperature, for example, the original PTC heating power is 4Kw, and the heating efficiency can reach 20℃ / h, but this model is equipped with an OBC of 3.3Kw, which requires the battery pack to be discharged additionally for heating), an efficient, automated method with flexible selection of multiple solutions for heating control is provided, which not only reduces the situation where the power battery discharges incorrectly during charging to heat the charging environment of the battery and causes over-discharge under extreme conditions, but also improves the charging efficiency and charging accuracy of the power battery, ensures the reliability and accuracy of charging the power battery, and is beneficial to improving the subsequent power battery power supply efficiency and power supply speed for the vehicle, which in turn helps the normal operation of the vehicle and improves the user experience of the vehicle.

[0110] In an optional embodiment, the above step 103 of heating and controlling the charging environment of the power battery according to the battery information and the thermal management solution so that the ambient temperature of the power battery rises to the second preset temperature may include:

[0111] When the thermal management scheme is the first thermal management scheme, determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information;

[0112] Based on the branch pickup demand, the target heating branch matching the branch pickup demand among all the heating branches of the battery high voltage circuit is controlled to be turned on;

[0113] The charging environment of the power battery is heated by the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises to a second preset temperature.

[0114] In an embodiment of the present invention, optionally, the battery high voltage circuit connected to the power battery may include a first heating branch provided with a first electric heating element and a second heating branch provided with a second electric heating element. The branch pickup requirement may include a single-way pickup requirement or a dual-way pickup requirement. Specifically, the method further includes:

[0115] According to the branch circuit closing requirement, a target heating branch matching the branch circuit closing requirement is selected from all heating branches of the battery high voltage circuit;

[0116] Among them, according to the branch pickup demand, the target heating branch matching the branch pickup demand is selected from all the heating branches of the battery high voltage circuit, which may include:

[0117] When the branch circuit closing requirement is a single-circuit closing requirement, determining the first heating branch circuit or the second heating branch circuit as the target heating branch circuit that matches the branch circuit closing requirement;

[0118] When the branch pickup requirement is a dual-branch pickup requirement, the first heating branch and the second heating branch are determined as target heating branches that match the branch pickup requirement. In this way, the selection flexibility and diversity of the target heating branches can be improved through the branch pickup requirement.

[0119] It can be seen that this optional embodiment can, when the thermal management scheme is the first thermal management scheme for heating the charging environment of the power battery through electric heating elements, accurately determine the branch closing requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information, and based on the branch closing requirement, control the conduction of the target heating branch that matches the branch closing requirement among all the heating branches of the battery high-voltage circuit, thereby improving the conduction control accuracy and efficiency of the target heating branch, and then heat the charging environment of the power battery through the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises slowly, and can improve the heating control accuracy and efficiency of the charging environment of the power battery through the electric heating element, which is conducive to efficiently and accurately realizing the control of the rising ambient temperature of the power battery.

[0120] In this optional embodiment, as an optional implementation, heating the charging environment of the power battery by the target electric heating element in the target heating branch so that the ambient temperature of the power battery rises to the second preset temperature may include:

[0121] When the branch circuit pickup requirement is a dual-circuit pickup requirement, the charging environment of the power battery is heated by the electric heating element in the target heating branch circuit that matches the dual-circuit pickup requirement, and the battery change information of the power battery during the heating process is detected, and the battery change information includes temperature change information and power change information;

[0122] Determine whether the real-time power level of the power battery represented by the power level change information is greater than or equal to a second preset power level, and the second preset power level is less than the first preset power level;

[0123] When it is determined that the real-time power of the power battery represented by the power change information is less than or equal to the second preset power, an operation of determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information is triggered;

[0124] When it is determined that the real-time power level of the power battery represented by the power level change information is greater than the second preset power level, the operation of heating the charging environment of the power battery through the electric heating element in the target heating branch that matches the dual-path suction requirement is repeated until the ambient temperature of the power battery rises to the second preset temperature.

[0125] In the embodiment of the present invention, specifically, the first preset temperature may be a preset battery charging prohibition temperature, and the second preset temperature may be a preset battery optimal charging temperature, wherein the battery charging prohibition temperature is used to indicate the temperature of the charging environment in which the power battery is located when charging of the power battery is prohibited, and the battery optimal charging temperature is used to indicate the optimal temperature of the charging environment in which the power battery is located when charging.

[0126] For example, assuming that the electric heating elements used in each heating branch are PTC contactors, the high-voltage battery circuit can adopt a 2*2Kw heating method. When the ambient temperature is low and the power battery needs to be heated, if the battery itself has a low charge, a single PTC can be turned on to allow the temperature to rise slowly; if the battery itself has a high charge, a dual PTC can be turned on to further improve the heating efficiency and reduce the time required for charging.

[0127] It can be seen that this optional implementation method can heat the charging environment of the power battery by the electric heating element in the target heating branch that matches the dual-path suction requirement when it is necessary to use a dual-path suction method to heat the charging environment of the power battery, which can improve the heating accuracy and reliability of the charging environment, and detect the battery change information of the power battery during the heating process. The battery change information includes temperature change information and power change information, which can improve the detection efficiency and accuracy of the battery change information, and judge that the power battery represented by the power change information has a large power. If not, the operation of determining the branch suction method to be adopted according to the power information is re-executed, which is beneficial to reduce the occurrence of battery mis-discharge during charging by setting a power abnormality detection process; if so, continue to heat the charging environment until its temperature rises to the second preset temperature, which is beneficial to improve the heating accuracy and reliability of the charging environment.

[0128] In this optional implementation, optionally, the method may further include:

[0129] When the ambient temperature of the power battery rises to a second preset temperature, the target heating branch is controlled to be disconnected so that the power battery is in a normal charging state.

[0130] It can be seen that this optional implementation can also quickly and accurately control the target heating branch to disconnect when the temperature of the charging environment rises to the optimal temperature required for charging, so that the power battery is in a normal charging state, which is beneficial to improving the charging efficiency and charging speed of the power battery to a certain extent.

[0131] In this optional embodiment, as another optional implementation, determining the branch circuit pickup requirement corresponding to the battery high voltage circuit to which the power battery is connected according to the power information included in the battery information may include:

[0132] According to the power information included in the battery information, determining whether the power information is used to indicate whether the power of the power battery is less than or equal to a first preset power;

[0133] When it is determined that the power information is used to indicate that the power of the power battery is less than or equal to the first preset power, the branch circuit pickup requirement of the power battery is determined as a single circuit pickup requirement;

[0134] When it is determined that the power information is used to indicate that the power of the power battery is greater than the first preset power, the branch circuit pickup requirement of the power battery is determined as a dual-circuit pickup requirement.

[0135] It can be seen that this optional implementation method can determine whether the power information is used to indicate that the power of the power battery is small based on the power information contained in the battery information. If so, it is determined that a single-circuit suction method needs to be adopted; if not, it is determined that a dual-circuit suction method needs to be adopted. This can improve the diversity and flexibility of determining the branch suction method to be adopted, and is conducive to improving the reliability and accuracy of the determined branch suction method.

[0136] For example, Figure 2 As shown, Figure 2 1 is a schematic diagram of a process for heating the charging environment of a power battery during a charging process disclosed in an embodiment of the present invention. Figure 2 As shown, when the power battery enters the preset charging mode (i.e. Figure 2 In the slow charging mode 2 in the power battery charging environment, it is detected whether the lowest temperature of the power battery charging environment is less than or equal to the first preset temperature (i.e. Figure 2 Tmin≤-30℃);

[0137] When the test result is no, the power battery is charged normally;

[0138] When the detection result is yes, it is further determined whether the power of the power battery is less than or equal to the first preset power (i.e. Figure 2 SOC≤10%);

[0139] When the judgment result is yes, the battery high voltage circuit connected to the power battery is controlled to attract the single heating branch (i.e. Figure 2 The branch where the PTC / heating film contactor is located is connected to the heating branch, so that the battery high voltage circuit enters the heating mode to heat the charging environment;

[0140] When the judgment result is no, the battery high voltage circuit is controlled to attract the dual heating branches, so that both heating branches are turned on, so that the battery high voltage circuit enters the heating mode to heat the charging environment, and judges whether the power battery power is less than or equal to the second preset power (i.e. Figure 2 If the SOC is less than or equal to the first preset power, the operation of determining whether the power battery is less than or equal to the first preset power is re-executed; if not, the operation of heating the charging environment through the dual heating branch is continued;

[0141] Detect whether the temperature of the charging environment rises to a second preset temperature (i.e. Figure 2 When the temperature rises to a second preset temperature, if the detection result is yes, all heating branches are disconnected and the power battery is charged normally.

[0142] Embodiment 2

[0143] See also Figure 3 , Figure 3 1 is a flow chart of another control method for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention. Figure 3 The control method for preventing the power battery from accidentally discharging during charging described above can be applied to a control device for preventing the power battery from accidentally discharging during charging, wherein the device may include a control device or a control server, wherein the control server may include a cloud server or a local server, which is not limited in the embodiments of the present invention. Figure 3 As shown, the control method for preventing the power battery from mis-discharging during charging may include the following operations:

[0144] 201. When it is detected that a power battery of a vehicle enters a preset charging mode, a thermal management solution for the power battery is determined.

[0145] 202. Based on the thermal management solution, detect the battery information of the power battery.

[0146] In the embodiment of the present invention, when the thermal management scheme is the second thermal management scheme, at this time, when step 202 detects that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to the first preset temperature, step 203 can be triggered to execute; when step 202 detects that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is greater than the first preset temperature, the power battery can be charged normally through this charging mode, or, as Figure 2 As shown, this process can be ended, and the embodiment of the present invention is not limited thereto.

[0147] 203. Detect the water inlet temperature of the water pump management system adopted by the second thermal management solution.

[0148] 204. Determine the speed mode of the water pump management system according to the water inlet temperature.

[0149] In an embodiment of the present invention, optionally, the speed mode may include a first speed mode or a second speed mode, wherein the first speed mode includes a mode in which the water pump speed is a preset first water pump speed, and the second speed mode includes a mode in which the water pump speed is a preset second water pump speed, wherein the first water pump speed corresponding to the first speed mode is higher than the second water pump speed corresponding to the second speed mode.

[0150] 205. Based on the speed mode, determine the parameter control requirements of the water pump management system.

[0151] In an embodiment of the present invention, the parameter control demand may include a water temperature control demand and / or a water pump speed control demand. Specifically, when the speed mode is the first speed mode, the parameter control demand includes a water temperature control demand, and the water temperature control demand may be a water temperature request as the water inlet temperature; when the speed mode is the second speed mode, the parameter control demand includes a water temperature control demand and a water pump speed control demand, wherein the water temperature control demand may include a demand to control the water temperature to be constant or a demand to dynamically adjust the water temperature, and the water pump speed control demand may include a demand to control the water pump speed to be constant or a demand to dynamically adjust the water pump speed, and the water temperature remains constant when it is different from the water pump speed, that is, when the water temperature control demand is a demand to control the water temperature to be constant, the water pump speed control demand is a demand to dynamically adjust the water pump speed; when the water pump speed control demand is a demand to control the water pump speed to be constant, the water temperature control demand is a demand to dynamically adjust the water temperature.

[0152] 206. According to the parameter control requirement, control the water pump management system to heat the charging environment of the power battery so that the ambient temperature of the power battery rises to a second preset temperature.

[0153] In the embodiment of the present invention, specifically, when the speed mode is the second speed mode, parameter conversion can be performed according to the battery pack current of the power battery, so as to dynamically adjust the water pump speed control demand and the water temperature control demand.

[0154] In the embodiment of the present invention, for other descriptions of step 201 to step 206, please refer to the detailed description of step 101 to step 103 in the first embodiment, and the embodiment of the present invention will not be repeated.

[0155] It can be seen that the implementation Figure 3The control method for preventing the power battery from mis-discharging during the charging process described can control the charging environment of the power battery by setting a thermal management scheme for the power battery, and when the power battery of the vehicle is in a low-temperature slow-charging state, the temperature information and / or power information of the power battery, as well as the thermal management scheme, are used to heat the charging environment of the power battery, thereby efficiently and accurately realizing the control of the rise of the ambient temperature of the power battery. Compared with the existing battery charging environment heating scheme (i.e., a scheme for heating the battery to increase the battery temperature based on the OBC output power and the thermal management required power, for example, the original PTC heating power is 4Kw, and the heating efficiency can reach 20℃ / h, but this model is equipped with an OBC of 3.3Kw, and the battery pack needs to be discharged additionally for heating), an efficient, automated method with flexible selection of multiple schemes for heating control is provided, which not only reduces the situation of mis-discharging of the power battery during the charging process to heat the charging environment of the battery and causes over-discharging under extreme conditions, but also improves the charging efficiency and charging accuracy of the power battery, ensures the reliability and accuracy of charging the power battery, thereby facilitating the subsequent power battery to provide power to the vehicle. The efficiency and speed of power supply, which in turn facilitates the normal operation of the vehicle and improves the user experience of the vehicle. In addition, when the second thermal management scheme is adopted, the water inlet temperature of the water pump management system adopted by the second thermal management scheme can be automatically detected, and the speed mode of the water pump management system can be determined according to the water inlet temperature, which can improve the accuracy and efficiency of determining the water pump speed mode. Subsequently, based on the speed mode, the parameter control requirements of the water pump management system are determined, which can improve the accuracy and efficiency of determining the parameter control requirements. Then, according to the parameter control requirements, the water pump management system is controlled to heat the charging environment where the power battery is located, so that the ambient temperature of the power battery rises to the second preset temperature, which can improve the accuracy and reliability of heating the charging environment based on the second thermal management scheme, and is conducive to improving the diversity and flexibility of heating the charging environment based on diversified thermal management schemes.

[0156] In an optional embodiment, the above step 204 of determining the speed mode of the water pump management system according to the water inlet temperature may include:

[0157] Determine whether the water inlet temperature is greater than the preset water inlet temperature;

[0158] When it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode;

[0159] When it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode.

[0160] It can be seen that this optional embodiment is capable of determining whether the water inlet temperature is greater than the preset water inlet temperature, and when it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode, and when it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, which can improve the selection diversity and flexibility of the speed mode based on the water inlet temperature, and is conducive to improving the reliability and accuracy of the selected speed mode.

[0161] For example, Figure 4 As shown, Figure 4 FIG. 1 is another schematic diagram of a process for heating the charging environment of a power battery during a charging process disclosed in an embodiment of the present invention. Figure 4 As shown, when the power battery enters the preset charging mode (i.e. Figure 4 In the slow charging mode 2 in the power battery charging environment, it is detected whether the lowest temperature of the power battery charging environment is less than or equal to the first preset temperature (i.e. Figure 4 Tmin≤-30℃);

[0162] When the test result is no, the process can be terminated, or the execution and parameter control requirements can be stopped (i.e. Figure 4 The heating operation corresponding to the stop water temperature request and water pump speed request in the above table is performed, and the power battery is charged normally (i.e. Figure 4 Full power charging in ).

[0163] When the test result is yes, it is further determined whether the water inlet temperature of the water pump management system is greater than the preset water inlet temperature (i.e. Figure 4 Tin>0℃);

[0164] When the judgment result is yes, the water pump management system is controlled to enter the first speed mode (i.e. Figure 4 In the high-speed mode of the water pump speed, the water temperature request is the water inlet temperature), so that the water pump management system heats the charging environment of the power battery;

[0165] When the judgment result is no, the water pump management system is controlled to enter the second speed mode (i.e. Figure 4 In the medium speed mode of the water pump speed, the speed and water temperature request are dynamically adjusted according to the battery pack current), so that the water pump management system heats the charging environment of the power battery;

[0166] Detect whether the temperature of the charging environment rises to a second preset temperature (i.e. Figure 4 If Tmin>0℃), if not, the operation of detecting whether the lowest temperature of the charging environment in which the power battery is located is less than or equal to the first preset temperature is re-executed. If so, the heating operation corresponding to the parameter control requirement is stopped, and the power battery is charged normally.

[0167] Embodiment 3

[0168] See also Figure 5 , Figure 5 Schematic diagram of a control device for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention. Figure 5 The control device for preventing the power battery from mis-discharging during charging may include a control device or a control server, wherein the control server may include a cloud server or a local server, which is not limited in the embodiment of the present invention. Figure 5 As shown, the control device for preventing the power battery from mis-discharging during charging may include:

[0169] The determination module 301 is used to determine a thermal management solution for the power battery when it is detected that the power battery of the vehicle enters a preset charging mode.

[0170] In an embodiment of the present invention, optionally, the thermal management scheme is a scheme for heating the charging environment of the power battery by a preset heating object, and the heating object is used to heat the temperature of the charging environment of the power battery, and the heating object includes an electric heating element or a water pump management system, which is not limited in the embodiment of the present invention.

[0171] The detection module 302 is used to detect battery information of the power battery based on the thermal management solution.

[0172] In an embodiment of the present invention, specifically, when the thermal management scheme is the first thermal management scheme for heating through an electric heating element, the battery information includes temperature information and power information; when the thermal management scheme is the first thermal management scheme for heating through a water pump management system, the battery information includes temperature information.

[0173] The control module 303 is used to control the heating of the charging environment of the power battery according to the battery information and the thermal management scheme when it is detected that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to the first preset temperature, so that the ambient temperature of the power battery rises to a second preset temperature, and the second preset temperature is higher than the first preset temperature.

[0174] It can be seen that the implementation Figure 3The control device for preventing the power battery from being discharged accidentally during charging can, by setting a thermal management solution for the power battery, control the heating of the charging environment of the power battery through the temperature information and / or power information of the power battery and the thermal management solution when the power battery of the vehicle is in a low-temperature and slow-charging state, thereby efficiently and accurately achieving control of the rise in the ambient temperature of the power battery. Compared with the existing battery charging environment heating solution (i.e., a solution that heats the battery based on the OBC output power and the thermal management demand power to increase the battery temperature, for example, the original PTC heating power is 4Kw, and the heating efficiency can reach 20℃ / h, but this model is equipped with an OBC of 3.3Kw, which requires the battery pack to be discharged additionally for heating), an efficient, automated method with flexible selection of multiple solutions for heating control is provided, which not only reduces the situation where the power battery discharges incorrectly during charging to heat the charging environment of the battery and causes over-discharge under extreme conditions, but also improves the charging efficiency and charging accuracy of the power battery, ensures the reliability and accuracy of charging the power battery, and is beneficial to improving the subsequent power battery power supply efficiency and power supply speed for the vehicle, which in turn helps the normal operation of the vehicle and improves the user experience of the vehicle.

[0175] In an optional embodiment, the manner in which the determination module determines the thermal management solution for the power battery specifically includes:

[0176] Obtaining at least one preset initial thermal management scheme for a power battery of a vehicle, each initial thermal management scheme having a corresponding execution priority;

[0177] When the number of initial thermal management schemes is 1, determining an initial thermal management scheme as a thermal management scheme for the power battery;

[0178] When the number of initial thermal management schemes is greater than 1, one with the highest execution priority is selected from all initial thermal management schemes as the thermal management scheme for the power battery.

[0179] It can be seen that this optional embodiment can give priority to executing the second thermal management scheme with the highest thermal efficiency for the battery part when the vehicle has both the first thermal management scheme and the second thermal management scheme, which is beneficial to improving the corresponding thermal efficiency of the power battery.

[0180] In an optional embodiment, the control module 303 controls the heating of the charging environment of the power battery according to the battery information and the thermal management solution so that the ambient temperature of the power battery rises to the second preset temperature. Specifically, the method may include:

[0181] When the thermal management scheme is the first thermal management scheme, the branch circuit pickup demand corresponding to the battery high-voltage circuit to which the power battery is connected is determined according to the power information contained in the battery information, and the branch circuit pickup demand includes a single-circuit pickup demand or a dual-circuit pickup demand;

[0182] Based on the branch pickup demand, the target heating branch matching the branch pickup demand among all the heating branches of the battery high voltage circuit is controlled to be turned on;

[0183] The charging environment of the power battery is heated by the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises to a second preset temperature.

[0184] It can be seen that this optional embodiment can, when the thermal management scheme is the first thermal management scheme for heating the charging environment of the power battery through electric heating elements, accurately determine the branch closing requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information, and based on the branch closing requirement, control the conduction of the target heating branch that matches the branch closing requirement among all the heating branches of the battery high-voltage circuit, thereby improving the conduction control accuracy and efficiency of the target heating branch, and then heat the charging environment of the power battery through the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises slowly, and can improve the heating control accuracy and efficiency of the charging environment of the power battery through the electric heating element, which is conducive to efficiently and accurately realizing the control of the rising ambient temperature of the power battery.

[0185] In this optional embodiment, as an optional implementation manner, the control module 303 heats the charging environment of the power battery through the target electric heating element in the target heating branch so that the ambient temperature of the power battery rises to the second preset temperature, which may specifically include:

[0186] When the branch circuit pickup requirement is a dual-circuit pickup requirement, the charging environment of the power battery is heated by the electric heating element in the target heating branch circuit that matches the dual-circuit pickup requirement, and the battery change information of the power battery during the heating process is detected, and the battery change information includes temperature change information and power change information;

[0187] Determine whether the real-time power level of the power battery represented by the power level change information is greater than or equal to a second preset power level, and the second preset power level is less than the first preset power level;

[0188] When it is determined that the real-time power of the power battery represented by the power change information is less than or equal to the second preset power, an operation of determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information is triggered;

[0189] When it is determined that the real-time power level of the power battery represented by the power level change information is greater than the second preset power level, the operation of heating the charging environment of the power battery through the electric heating element in the target heating branch that matches the dual-path suction requirement is repeated until the ambient temperature of the power battery rises to the second preset temperature.

[0190] It can be seen that this optional implementation method can heat the charging environment of the power battery by the electric heating element in the target heating branch that matches the dual-path suction requirement when it is necessary to use a dual-path suction method to heat the charging environment of the power battery, which can improve the heating accuracy and reliability of the charging environment, and detect the battery change information of the power battery during the heating process. The battery change information includes temperature change information and power change information, which can improve the detection efficiency and accuracy of the battery change information, and judge that the power battery represented by the power change information has a large power. If not, the operation of determining the branch suction method to be adopted according to the power information is re-executed, which is beneficial to reduce the occurrence of battery mis-discharge during charging by setting a power abnormality detection process; if so, continue to heat the charging environment until its temperature rises to the second preset temperature, which is beneficial to improve the heating accuracy and reliability of the charging environment.

[0191] In this optional implementation, the control module 303 is optionally further configured to control the target heating branch to be disconnected when the ambient temperature of the power battery rises to a second preset temperature, so that the power battery is in a normal charging state.

[0192] It can be seen that this optional implementation can also quickly and accurately control the target heating branch to disconnect when the temperature of the charging environment rises to the optimal temperature required for charging, so that the power battery is in a normal charging state, which is beneficial to improving the charging efficiency and charging speed of the power battery to a certain extent.

[0193] In this optional embodiment, as another optional implementation, the control module 303 determines the branch pickup requirement corresponding to the battery high-voltage circuit connected to the power battery according to the power information included in the battery information, which may specifically include:

[0194] According to the power information included in the battery information, determining whether the power information is used to indicate whether the power of the power battery is less than or equal to a first preset power;

[0195] When it is determined that the power information is used to indicate that the power of the power battery is less than or equal to the first preset power, the branch circuit pickup requirement of the power battery is determined as a single circuit pickup requirement;

[0196] When it is determined that the power information is used to indicate that the power of the power battery is greater than the first preset power, the branch circuit pickup requirement of the power battery is determined as a dual-circuit pickup requirement.

[0197] It can be seen that this optional implementation method can determine whether the power information is used to indicate that the power of the power battery is small based on the power information contained in the battery information. If so, it is determined that a single-circuit suction method needs to be adopted; if not, it is determined that a dual-circuit suction method needs to be adopted. This can improve the diversity and flexibility of determining the branch suction method to be adopted, and is conducive to improving the reliability and accuracy of the determined branch suction method.

[0198] In another optional embodiment, the control module 303 controls the heating of the charging environment of the power battery according to the battery information and the thermal management solution so that the ambient temperature of the power battery rises to the second preset temperature. Specifically, the method may include:

[0199] When the thermal management scheme is the second thermal management scheme, detecting the water inlet temperature of the water pump management system adopted by the second thermal management scheme;

[0200] Determine the speed mode of the water pump management system according to the water inlet temperature;

[0201] Based on the speed mode, determining the parameter control requirements of the water pump management system, the parameter control requirements including water temperature control requirements and / or water pump speed control requirements;

[0202] According to the parameter control requirement, the water pump management system is controlled to heat the charging environment of the power battery so that the ambient temperature of the power battery rises to a second preset temperature.

[0203] It can be seen that this optional embodiment can automatically detect the water inlet temperature of the water pump management system adopted by the second thermal management scheme when the second thermal management scheme is adopted, and determine the speed mode of the water pump management system according to the water inlet temperature, which can improve the accuracy and efficiency of determining the water pump speed mode. Subsequently, based on the speed mode, the parameter control requirements of the water pump management system are determined, which can improve the accuracy and efficiency of determining the parameter control requirements. Then, according to the parameter control requirements, the water pump management system is controlled to heat the charging environment where the power battery is located, so that the ambient temperature of the power battery rises to the second preset temperature, which can improve the accuracy and reliability of heating the charging environment based on the second thermal management scheme, and is conducive to improving the diversity and flexibility of heating the charging environment based on diversified thermal management schemes.

[0204] In this optional embodiment, as an optional implementation manner, the control module 303 determines the speed mode of the water pump management system according to the water inlet temperature, which may specifically include:

[0205] Determine whether the water inlet temperature is greater than the preset water inlet temperature;

[0206] When it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode;

[0207] When it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, and the first water pump speed corresponding to the first speed mode is higher than the second water pump speed corresponding to the second speed mode.

[0208] It can be seen that this optional implementation mode is capable of determining whether the water inlet temperature is greater than the preset water inlet temperature, and when it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode, and when it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, which can improve the selection diversity and flexibility of the speed mode based on the water inlet temperature, and is conducive to improving the reliability and accuracy of the selected speed mode.

[0209] Embodiment 4

[0210] See also Figure 6 , Figure 6 FIG. 1 is a schematic diagram of another control device for preventing mis-discharging of a power battery during charging disclosed in an embodiment of the present invention. Figure 6 As shown, the control device for preventing the power battery from mis-discharging during charging may include:

[0211] A memory 401 storing executable program codes;

[0212] a processor 402 coupled to the memory 401;

[0213] The processor 402 calls the executable program code stored in the memory 401 to execute the steps of the control method for preventing the power battery from mis-discharging during the charging process described in the first embodiment of the present invention or the second embodiment of the present invention.

[0214] Embodiment 5

[0215] An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the steps of the control method for preventing the mis-discharge of a power battery during charging described in Embodiment 1 or Embodiment 2 of the present invention.

[0216] Embodiment 6

[0217] An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute the steps of the control method for preventing the mis-discharge of a power battery during charging described in Embodiment 1 or Embodiment 2.

[0218] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0219] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0220] Finally, it should be noted that the control method and device for preventing the mis-discharge of a power battery during charging disclosed in the embodiment of the present invention disclose only the preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A control method for preventing mis-discharge of a power battery during charging, characterized in that: The method comprises: When it is detected that the power battery of the vehicle enters a preset charging mode, determining a thermal management solution for the power battery; Based on the thermal management solution, detecting battery information of the power battery; When it is detected that the temperature information contained in the battery information is used to indicate that the ambient temperature of the power battery is less than or equal to a first preset temperature, the charging environment of the power battery is heated and controlled according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature, which is higher than the first preset temperature.

2. The control method for preventing mis-discharge of a power battery during charging according to claim 1, characterized in that: The thermal management scheme is a scheme for heating the charging environment of the power battery by a preset heating object, the heating object is used to heat the temperature of the charging environment of the power battery, and the heating object includes an electric heating element or a water pump management system; When the thermal management scheme is a first thermal management scheme of heating by the electric heating element, the battery information includes temperature information and power information; When the thermal management scheme is a first thermal management scheme of performing heating through the water pump management system, the battery information includes the temperature information.

3. The control method for preventing mis-discharge of a power battery during charging according to claim 2, characterized in that: The step of controlling the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature includes: When the thermal management scheme is the first thermal management scheme, determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information, wherein the branch circuit pickup requirement includes a single-circuit pickup requirement or a dual-circuit pickup requirement; Based on the branch closing requirement, controlling a target heating branch among all heating branches of the battery high voltage circuit that matches the branch closing requirement to be turned on; The charging environment of the power battery is heated by the target electric heating element in the target heating branch, so that the ambient temperature of the power battery rises to a second preset temperature.

4. The control method for preventing mis-discharge of a power battery during charging according to claim 3, characterized in that: The step of heating the charging environment of the power battery by the target electric heating element in the target heating branch so that the ambient temperature of the power battery rises to a second preset temperature includes: When the branch circuit pickup requirement is the dual-circuit pickup requirement, the charging environment of the power battery is heated by the electric heating element in the target heating branch circuit that matches the dual-circuit pickup requirement, and battery change information of the power battery during the heating process is detected, wherein the battery change information includes temperature change information and power change information; Determining whether the real-time power level of the power battery represented by the power level change information is greater than or equal to a second preset power level, and the second preset power level is less than the first preset power level; When it is determined that the real-time power of the power battery represented by the power change information is less than or equal to the second preset power, the operation of determining the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected according to the power information contained in the battery information is triggered; When it is determined that the real-time power of the power battery represented by the power change information is greater than the second preset power, repeatedly performing the operation of heating the charging environment of the power battery by using the electric heating element in the target heating branch matching the dual-path pickup requirement until the ambient temperature of the power battery rises to the second preset temperature; And, the method further comprises: When the ambient temperature of the power battery rises to the second preset temperature, the target heating branch is controlled to be disconnected so that the power battery is in a normal charging state.

5. The control method for preventing mis-discharging of a power battery during charging according to claim 3 or 4, characterized in that: The determining, according to the power information included in the battery information, the branch circuit pickup requirement corresponding to the battery high-voltage circuit to which the power battery is connected, includes: According to the power information included in the battery information, determining whether the power information is used to indicate whether the power of the power battery is less than or equal to a first preset power; When it is determined that the power information is used to indicate that the power of the power battery is less than or equal to the first preset power, determining the branch circuit pickup demand of the power battery as a single circuit pickup demand; When it is determined that the power information is used to indicate that the power of the power battery is greater than the first preset power, the branch circuit pickup requirement of the power battery is determined as a dual-circuit pickup requirement.

6. The control method for preventing mis-discharge of a power battery during charging according to claim 2, characterized in that: The step of controlling the charging environment of the power battery according to the battery information and the thermal management scheme so that the ambient temperature of the power battery rises to a second preset temperature includes: When the thermal management scheme is the second thermal management scheme, detecting the water inlet temperature of the water pump management system adopted by the second thermal management scheme; Determining a speed mode of the water pump management system according to the water inlet temperature; Based on the speed mode, determining a parameter control requirement of the water pump management system, wherein the parameter control requirement includes a water temperature control requirement and / or a water pump speed control requirement; According to the parameter control requirement, the water pump management system is controlled to heat the charging environment of the power battery so that the ambient temperature of the power battery rises to a second preset temperature.

7. The control method for preventing mis-discharge of a power battery during charging according to claim 6, characterized in that: Determining the speed mode of the water pump management system according to the water inlet temperature includes: Determining whether the water inlet temperature is greater than a preset water inlet temperature; When it is determined that the water inlet temperature is greater than the preset water inlet temperature, the speed mode of the water pump management system is determined to be the first speed mode; When it is determined that the water inlet temperature is less than or equal to the preset water inlet temperature, the speed mode of the water pump management system is determined to be the second speed mode, and the first water pump speed corresponding to the first speed mode is higher than the second water pump speed corresponding to the second speed mode.

8. The control method for preventing mis-discharging of a power battery during charging according to any one of claims 1, 2, 3, 4, 6 and 7, characterized in that: The determining of a thermal management solution for the power battery includes: Acquire at least one preset initial thermal management scheme for the power battery of the vehicle, each of the initial thermal management schemes having a corresponding execution priority; When the number of the initial thermal management schemes is 1, determining the initial thermal management scheme as a thermal management scheme for the power battery; When the number of the initial thermal management schemes is greater than 1, one with the highest execution priority is selected from all the initial thermal management schemes as the thermal management scheme for the power battery.

9. A control device for preventing accidental discharge of a power battery during charging, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the control method for preventing the power battery from accidentally discharging during charging as described in any one of claims 1 to 8.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the control method for preventing the power battery from accidentally discharging during charging as described in any one of claims 1 to 8.

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